2013年8月30日星期五

The use of more than one job at the same time sand shaker

The use of multiple sand vibrating screen simultaneously, the waste can be re- oscillating screen , improve utilization of sand can be sieved material directly into a similar

specification and qualified material becomes waste into treasure. Reduce the amount of sand lost shaker of more than 50% . Also in the use of sand vibrating sieve machine

When the water-wash system can be added , and through the circulation to solve the problem of waste water . Rinse sand, gravel , clay content to reduce excessive phenomenon .

But also through the water cycle, can work day and night , do not worry about water decreased. However, in the purchase of equipment , when sand shaker ,

To do civil foundation work hardening production site in advance to avoid poor planning resulting slowdown rework phenomenon.
Fertilizer shaker with low energy consumption , high output , simple structure, easy maintenance, fully enclosed structure , etc. . No dust shaker fertilizer , automatic nesting

, more suitable for pipeline operations. Fertilizer vibration sieving machine of single and multi-layer, suitable for different customer needs, but also for customers

Individually customized.
Large angle direction of vibration shaker design angle 45 °, horizontal effect is able to make large angle vibrating sieve machine performance parameters are reasonable

configuration , to get good speed and handling of materials and high volume screening efficiency. But according to individual process requirements and certain special

Special needs vibrating screen can be placed at an angle , generally 5 ° or 10 °. Inclined vibrating screen is mainly used for fine grading and dehydrating materials off the

mud , etc., so if the angle is too large , it may lead to poor screening efficiency .

Selection of dust shaker

Dust shaker selection : First, to consider the use of the selected dust shaker , shaker dust generally has two purposes , classification of materials and material dehydration,

medium . In determining the dust shaker purposes , the first thing to consider is coal screening machine material characteristics, such as the screening material

The bulk density , angle of repose , particle shape , the material flow resistance, adhesion, moisture absorption , there is no static electricity , the particle surface

moisture , operating temperature , particle size distribution , which will affect the operational performance of screening material . Second , select the mesh , the mesh is

selected to be

Consider sieve hours capacity , porosity, mesh , Linear vibrating screen and mesh plug life , stick by other factors. Finally, experiments to determine the physical parameters of a sieve , mesh

form of exercise such as vibration frequency , amplitude ,  pore size screen was used , a straight mesh

Diameter , material and mesh  inclination angle .
Vibration on vertical conveyors, vertical conveyors under vibration is a new type of vertical vibration conveyor equipment, vertical vibration on the conveyor, vibrating under

vertical conveyor is widely used in metallurgy , coal, building materials, food , machinery, medicine , food and other industries. Vibration on vertical conveyors

And lower vibration vertical conveyors for powder, granular materials, vertical lifting operation , the conveyor can also be carried out on the material drying and cooling

operations. Vibration on vertical conveyor, vibrating under vertical vibration conveyor drive motor is mounted on the lower conveyor tower , two vibrating motors symmetrical

Cross mounted , transmission tower in the tube and the welded tube groove formed around the screw conveyor , conveyor pylon on the damping device , the damping device consists

of a base and isolation springs .

2013年8月29日星期四

Motor feeder installation requirements

1 feeder used for batching , dosing time in order to ensure uniform feeding stability and to prevent gravity materials should be installed horizontally , such as for general

continuous feeding materials Sand vibrating screen can be down-dip 10 ° installation. For viscous materials and high moisture material can be down-dip 15 ° installation.
(2) After installation of the feeder should be left lateral clearance of 20mm should be the level of swimming , hanging device using flexible connections .
3 air test done, the entire bolt once, especially the vibration motor bolts , 3-5 hours of continuous operation should be re- tightened once.
4 when testing two vibrating motors must reverse rotation , current and noise stability , abnormal should promptly stop treatment .
5 motor bearing grease once every February filling , filling the hot season should once monthly oil .
Motor feeder maintenance and requirements:
1 feeder during operation should always check the amplitude of the vibration of the motor current and motor surface Linear vibrating screen temperature , requiring uniform amplitude before and after ,

do not swing around shaking , vibrating motor current stability, such as unusual circumstances , should immediately stop processing .
2 vibration motor bearing lubrication is the entire feeder working key , in the course of second-rate should be raised regularly molybdenum bearing # 2 grease filling once every

two months , the monthly filling the hot season once every six months once the motor overhaul , replacement of internal bearings.

How to maintain good GZG motor feeder

How to maintain good GZG motor feeder breaker, let GZG motor feeder better serve you do ? Here I give you support two strokes

1, GZG vibrating feeder motor bearing lubrication is the entire feeder working key , in the course of second-rate should be raised regularly molybdenum bearing # 2 grease

filling once every two months , high temperatures plate feeder season filling once a month , once every six months to overhaul the motor , replace the internal bearings. 2 ,

Feeder during operation should always check the amplitude of the vibration of the motor current and motor surface temperature , requiring uniform amplitude before and after , do

not swing around shaking , vibrating motor current stability, such as unusual circumstances , should immediately stop processing .

2013年8月28日星期三

Precautions start shaker

Shaker before the start there are some considerations and maintenance work is indispensable :
1, check the rubber pad with sieve and rack connections .
2, check all parts are securely locked .
3, check the vibrating motor:
4, check the supply voltage shaker
5 , check the screen machinery grid on the banana screen surface is pressed .
6 , check the vibrating motor with sieve connections.
7 , check the vibrating motor interlock control devices.
8 Remove the motor cover and check the relative phase angle of the segments are aligned , tighten the fastening screws the segments .
9 , two motor mounting angle shall be consistent feed means , tightening the shutter .
10 , check the inlet and outlet hose connections are sealed , but not too tight , otherwise it will twist in the sieve body movement broke , no-load test .
11 , runs in, vibrating sieve body and chassis , etc. not to have collision or unusual sounds.
12 , check the amplitude sieve for reciprocating linear motion may not have distorted and other irregularities .
13 , 10-15 minutes after the operation , using the wrench tightening bolts used the drive mechanism .
Operators must develop good operating practices, in order to better reduce production costs and improve efficiency.

Vibration motor development prospects in the industry

Vibration motor industry in the future , micro vibration motor with high performance and with precision motor control systems will play a leading role in the appearance of

ordinary generic heavy Mobile crushing plant motor , the vibration of its own devastating more serious , direct impact on their life and performance play . Special

Do not be in a mine field of application , maintenance and repair are far below standard, especially with the continuous use of dust pollution , bushings and lubricants is not

timely cleaning of non-compliance . Reform of new mobile screening plant products, take the high road , the development of precision and small vibration motor vibration motor development, especially

Mine explosion-proof vibration motor development . The introduction of foreign vibration motor technology , the development of self- economy is a major factor in the development

of enterprises and competition embodies the essence .
Lack of sharing of domestic vibration technology industry , the slow development of its technology , the phenomenon showed a significant difference between the two , micro

vibration motor vibration motor and general principles on the technical and less communication , the lack of cooperation between enterprises , the profits of ordinary vibration

motor gradually reduced, the new motor

Combined with the development of the electronics industry technology, research and development on the original multi-purpose product technical issues , such as mobile phone

vibration motor vibration motor used in flat , medical and health supplies that are used in vibration massage motors. Will be the future of high-margin products.
Many manufacturers are now shouting industry profits fell to a low vibration , vibration motor prices have fallen to historic lows , the quality can be guaranteed , regional

brand can be protected and development of all enterprises are worried about the two years of raw materials continue to rise, indeed

Affect the vibration industry, but certainly not the main reason for development of enterprises encounter difficulties .
Imports in the domestic application of the vibration motor limitations and more problems , first of all maintenance and repair problems in the country is difficult to solve ,

mounting dimensions are different, resulting in domestic motor can not replace each other, the differences Furthermore technology and performance differences. We can see that

the development of the domestic industry, the vibration

With foreign countries there are still a considerable gap . Absorb foreign technology into I , the formation of research teams , research and development of their products , is

an important issue for future development .

2013年8月27日星期二

Will cause the sieve shaker linear fracture occurs Factors

    linear vibrating screen mesh rendering fracture, generally due to vibration sieve mesh without tension (or pull tight) formed under the state support bar and mesh sieve box

between the secondary vibration caused by the vibrating Sand screening machine mesh a regular linear fracture, several possible causes of this damage is

:
Screen size is too long, causing the tensioning screw Zhang is not tight; ZS vibrating sieve machine tensioner problems, tension plate and screening machine is not complete, the

tension plate (hook) wear thin or deformed; multi-linear vibration screen mesh crimping shape and size do not match with the tension plate; sieve welding fracture conductivity

Structural damage caused by the sieve; rubber pad free of wear or when; mesh sieve machine design or structural defects; efficient linear vibrating sieve box support bar below

the screen, which has some support bar and mesh spacing; shaker machine four spring stiffness uneven; shaker machine amplitude is too large

And so on.

Vibrating sieve iron accumulation how do online

CLAY vibration amplitude is too small, difficult conditions in the polymer drilling fluid stone screening machine, can not effectively overcome the drill cuttings (clay) of viscous forces,

resulting cuttings accumulation in the sieve shaker Circular vibrating screen and quickly damaged.

Solution: ① increased vibration amplitude; ② flush with spraying sieve shaker and cuttings, reducing the viscosity of the cuttings, but this method only allows the addition of

water suitable for the occasion; ③ Adjust the mouth end of the row of sand screen angle down conducive cuttings discharged by gravity, but it may cause

Running pulp; ④ replacement mesh sieve shaker single screen or adjust the flow of drilling fluid flow only point to ensure close mesh export, so that the cuttings in the

drilling fluid lubrication smoothly discharged.

2013年8月25日星期日

Mining machinery industry to enhance innovation capability

Application and development of mining machinery and infrastructure are inextricably linked, in the near future there is a great development, but it seems a lot of people in the

industry, I had this in the mining machinery stone feeding machine industry, the technological level to have great with foreign differences with foreign behind many of our domestic mining machinery

technology currently used mostly in the 1980s when the technology came from abroad, in China, the share of the domestic coal vibrating screen machinery also simply accounted for less than 80%,

In mostly imported products, big, fine, sharp and strong sets of products, such as crushers, large high-efficiency separation equipment, full-face joint boring machine, coal

mining, grinding equipment and other products.
Mining machinery industry, science and technology is not strong, the reform and opening up, mining machinery sector has been in the market for technology to improve the

technical level of the main ways to view the world from a comprehensive course of development of each country, the main products are stand-alone devices to stand-alone to

complete the process in the evolution of the process equipment, mining machinery manufacturing country generally completed only complete stand-alone products into production, as

use of the product by the person to be responsible for the process, the single product of the process plant is also completed by professionals, which resulting in equipment

manufacture and use of equipment, the gap between, experts believe that when mining machinery manufacturing sectors and enterprises process design is weak in the case, except in

the case of their own conditions as well organize forces into the role, should be taken abroad domestic construction companies and different forms of joint professional design

institutes, including the formation of groups, unions, the introduction of talent, technology and other methods to fight in a joint project on the design methods, the first

intervention to improve and achieve win-win situation.
In addition, experts suggest, mining machinery industry is not applied technology research data and databases, you can not convince customers use the company's products and

processes, let alone truly innovative application of technology.

Shaker development

As China's overall industrial development of the Feeding equipment equipment quality also put forward higher requirements, and its development has been raised to a new stage,

ultrasonic coal crushing plant is the same, its features and performance, at home and abroad, which has to high-efficiency, high yield quantitative development; towards

standardization, serialization, universal development; vibration intensity increases; to light, environmental protection, simplify the structure of the direction of development

trends.
In the shaker industry, ultra-fine powder materials require special equipment to screening, Hongyuan vibratory screening machine after years of experience in fine grading,

developed a special ultra-fine powders of S49C ultrasonic vibrating screen, an effective solution to the strong absorption, Easy reunion, high static, high precision, high

density, light weight and other screening problems. Ultrasonic generator to achieve the perfect combination with the shaker, and the performance achieved great breakthrough!
After improvement in low-density powder horizon in gravity settling down, slip, high-density metal in the net mouth to remain with electrostatic powder adheres to the material

to improve screening efficiency. After ultrasonic generator coupled to rate than without an increase of 50% -400%.

2013年8月19日星期一

Feeder safety requirements

1, the regular maintenance and repair is to extend the life of vibrating feeder, an important means to ensure the normal sieving machine operation, the user should be paid. For lubrication, you

should note the following:
(1) The machine adopts thin oil splash lubrication, lubricants should be based on place of use, the temperature conditions determine the general use of gear oil;
(2) shall ensure that the thin exciter oil Mobile crushing plant standard height above the oil surface (through the joint bends filling), must be replaced every 3-6 months once, oil change,

application of clean gasoline or kerosene tanks, bearing raceway and gear surfaces.
2, security technology:
(1) The machine operator, subject to safety and technical education;
(2) operation, the non-machine side Liren, touching the body, adjusting, clear finishing, cleaning or maintenance, etc.;
(3) machinery and equipment should be grounded, insulated wires should be reliable and packed in snakeskin tube, always check the electrical wiring for wear and leakage.

Mechanical shaker classification

Mainly divided into Linear vibrating screen vibrating screen, circular vibrating screen, high frequency vibrating screen. According to the type vibrator shaker vibration

screening can uniaxial and biaxial shaker shaker. Is the use of single-axis shaker excitation so unbalanced weight oscillating screen box, screen tilt, the trajectory of a screen

box

Generally circular or oval. Biaxial shaker is different to the use of synchronous rotation of the pair of unbalanced heavy vibrating screen surface horizontal or gently inclined

sieve box trajectory is a straight line. Inertial vibrating screen vibrating screen, eccentric vibrating screen, vibrating screen and self-centering and other types of

electromagnetic shaker.
Linear vibrating screen
Shaker excitation using the vibration motor as vibration source, so that the material in the sieve was tossed, and forward in a straight line, the material from the feeder

evenly into the screening machine feed, by multi-screen several kinds of specifications The oversize, undersize fraction, respectively, from the respective exit

Discharge. With low energy consumption, high output, simple structure, easy maintenance, fully enclosed structure, no dust, automatic nesting, more suitable for pipeline

operations. Work, two-motor synchronous reverse placed so that the exciter excitation force generated reverse, forcing driven mesh sieve to make longitudinal movement

To the surface of the material by the exciting force and periodically thrown forward a range, thus completing the materials screening operations. Linear shaker (gridiron) with

stable, reliable, low consumption, low noise, long life, stable modes, screening efficiency advantages, is a highly efficient design of new screening

Equipment, widely used in mining, coal, metallurgy, building materials, refractories, light industry, chemical industry.
Circular Vibrating Screen
Circular Vibrating Screen Circular Vibrating Screen (Vibrating Feeder) to make a circular movement, a number of layers, efficient new shaker. Circular vibrating screen using

cylinder-type eccentric shaft vibration exciter and partial block help to adjust amplitude, material sieve drip line length, screening specifications, reliable structure, strong

exciting force, high screening efficiency

High, low vibrating noise, durable, easy maintenance, use of safety features, round vibrating screen is widely used in mining, building materials, transportation, energy,

chemical industry product classification. Circular Vibrating Screen are screen box, screen, vibrators, damping spring device, chassis and other components. Shake

Actuator on the side in the screen box, together with the motor through the coupling or belt drive rotation, centrifugal force, forcing the screen box vibrate. Screen is the

main wearing parts. According to the material product and user requirements, can be high manganese steel woven mesh, perforated metal and rubber sieve sieve, sieve with

Single and double two kinds, all kinds of sieve screening effect can meet different requirements. The series circular vibrating screen for the seat mounting. Screen angle can be

adjusted by changing the position of the spring seat height to achieve.
High frequency vibrating screen
High-frequency sieve shaker short, high-frequency vibrating screen (high-frequency screen) by the exciter, pulp distributor, screen frame, frame, suspension springs and sieve

and other components.
High frequency vibrating screen (frequency screen), high efficiency, small amplitude, high frequency of screening. High frequency vibrating screen with the principle of common

screening equipment different, because high-frequency vibrating screen (high-frequency screen) using a high-frequency, on the one hand destroyed the surface tension of pulp and

fine-grained material in the sieve surface high-speed oscillation

Accelerate the large density of useful minerals and segregations effect, increasing the granularity of the material and sieve separation less than the probability of contact.
Stone trommel
Trommel drum is hexagonal, rack, funnel, reducer, motor into five parts. After crushing the stone into the drum, on the one hand with the rotation of the drum being screened by

the centrifugal force of rotation of the drum and jigging action of screening material. On the one hand large size of stone along

The slope of the drum forward flow through various mesh sieve gradually being screened out. After screening out small stone falling into each funnel, then the labor movement by

the people rushed out of the finished product or gravity heap. Its structure is simple and reliable, smooth running, with a good seal, no pollution, low noise, fast changer

McNair, fine grading, sorting a large proportion of high yield, sorting accuracy, low failure rate, easy maintenance, etc., especially suitable for use grading gravel yard.

Trommel fine workmanship, durable, steel to steel welding, funnel large volume of steel pick from. With five missing

Bucket were discharged. Funnel spout with flange connections can be made to both sides or one side material, easy to transport or gravity pull, increase production, prevent

blocking material wear mesh, delay production.

2013年8月18日星期日

Miniature electromagnetic vibrating feeder advantages and characteristics

Miniature electromagnetic Vibrating feeder is a new feeding equipment, widely used in mining, metallurgy, coal, building materials, chemicals, electricity, food and other

industries, for the massive, granular and powdered materials from storage silos or other storage feeding equipment in uniform, continuous or quantitatively to receiving feed

located

Equipment, the plate-type electromagnetic vibrating Pan feeder adapted to automatic batching, quantitative packaging and automatic control. With a small volume, low noise, light

weight, low power consumption, easy installation and maintenance, etc..

      Miniature electromagnetic vibrating feeder advantages: small electromagnetic vibrating feeder during use, you can adjust the exciting force to change and control the flow,

and thus convenient adjustment, flow stability, low noise, low power consumption, no red material phenomenon, while The machine has a light weight, small size, Paul

Yang and convenient features, such as a closed structure that prevents dust spills and environmental pollution.

DZT electromagnetic vibrating feeder features:
        1, electromagnetic vibrating feeder electrical control uses a half-wave rectifier appliances, can be adjusted to the quantity, can be used for automatic control of the

production process, production process automation.
  2, electromagnetic vibrating feeder no rotating parts, no lubrication, simple structure, easy maintenance.
3, small electromagnetic vibrating feeder chute made of alloy steel plate, suitable conveying high temperature, severe wear and corrosive materials.

Electromagnetic feeder is a weight measurement and quantitative control as one of the new generation of products

Electromagnetic vibrating weight feeder is a steady flow of powder material conveying, weighing measurement and quantitative control as one of the new generation of products; DZ1

electromagnetic belt weigh feeder for a variety of industrial environments continuous metering of the powder materials and ingredients; micro- spiral electromagnetic vibrating

feeder using a number of first

Advanced technology, reliable operation, high precision control; electromagnetic feeder is particularly suitable and building materials, metallurgy, electric power, chemical

industry, continuous measurement of powder materials and ingredients.

After the material of the electromagnetic vibrating feeder tray detected weight by weighing to determine the weight of material on the tape, mounted at the rear of the digital

speed sensor to continuously measure the speed of the feeder, the pulse output proportional to the speed sensor at the speed of the feeder,

Speed ​​signal and the weight signal fed together DZ1 electromagnetic vibrating feeder controller, a microprocessor, generates and displays the total volume / instantaneous flow.

The flow rate is compared with the set flow rate, controlled by the output signal of the inverter control instrumentation changes feeder drive

Speed ​​so tiny spiral electromagnetic vibrating feeder material flow on the changes and remain in the set close to the feed flow rate, in order to achieve the requirements of

electromagnetic feeder.

2013年8月16日星期五

The material in the feeder to the desired particle size by crushing process

The material under the feeder to the desired particle size by crushing after the material sent by the hoist storage hopper, then by Gf impeller powder machine will feed into the

star-shaped uniform continuous unloader China Vibrating Screen grinding chamber, when the centrifugal force due to the rotation , roller swings outward, pressed on the grinding ring, shovel blade

materials

Sent between the roller and grinding ring, because the rolling mill roll to achieve the purpose of crushing. After grinding the powder material with the circulating air blower

is brought into vibrating screen manufacturers rotation under the feeder for sorting, fine through coarse material regrinding, qualified powder into the air finished cyclone powder collector through the

powder tube row

Out is finished. In Gf internal impeller powder material to be ground in a certain moisture, grinding heat, moisture evaporates, and the whole of the pipe interface is not

tight, the outside air is drawn into the circulation increased pressure in the negative pressure to ensure the mill mode of operation, the increase in air traffic

I discharged through duct precipitator was after purification into the atmosphere.

       Under the feeder Scope: unloader for grinding barite, limestone, ceramics, slag, etc. Mohs hardness of not greater than 9.3 and humidity below 6% of non-inflammable

mines, metallurgy, chemicals, building materials and other industries more than 280 kinds of materials for high fine powder processing, product

Particle size 80-425 head of the regulator (the smallest 1,000 head). Swing under the feeder can add special device can produce 30-80 mesh coarse powder. Gf impeller powder

machine host, roll grinding hanger on fastening a 1000-1500 kg pressure spring is. After beginning work, grinding

Spindle rotary roll around, and in the high-pressure spring and centrifugal dual role, keep grinding ring is rotated, the rotation over the same pressure under dynamic

conditions Raymond mill high 1.2 times the yield is greatly improved. When the star under the feeder material into the grinding chamber, by the shovel blade into the Roller

Between the grinding ring rolling, rolling pink child with the blower after the cycle wind machine, qualified with the powder flow into the cyclone powder collector collection

is finished, large particles tablets to regrinding. Circulating air blower to repeat the above process, I entered the Wind bag filter purification

. When the grinding roller and grinding ring reach a certain wear, adjust the length of the spring pressure to keep the grinding roller and grinding ring between the constant

grinding pressure.

Block-type disc feeder use vibrator eccentric rotation of the centrifugal force

        Hanging disc feeder is suitable for the following fines 20mm feeding equipment. Block-type disc feeder by driving means, feeder body, metering belt conveyor and metering

device component. Feeder and Mining vibrating screen driven by a set of device drivers, the electric drive unit

Magnetic clutch has achieved feeder open, stop, and the role of both functional transformation can evenly and continuously fed to the material under a process for feeding

various non-viscous material, DK-type disc feeder Not good flow properties for the powder materials, the use of small flow disk

Feeder feed materials are ores, coal, cement, clinker, limestone, clay powder, granular or small bulk materials.

        Block-type disc feeder is to use the vibrator eccentric rotation of the centrifugal force, so sieve compartment, movable parts such as vibrators forced continuous circle

or approximately circular movement. Material is in the car with the Vibrating screen surface inclined to make continuous throwing motion, and for objects evenly

Material supplied by the feed mouth. When the plate moves forward together with the material, the material within the hopper along with the body of the space filled. When the

plate moves backwards, disc feeder hanging on the floor material can not be returned along hampered unloading achieve feeding. Changing the amplitude of plate movement, the

frequency

Rate and the discharge gate height adjustable feeding amount. Small flow disc feeder feeding amount is generally 40 tons / hour or less. DK-type disc feeder suitable for medium

and small size materials, there are two kinds of trough and tilting feeder. Feeder plate is flat, working reciprocate. Pendulum

Feeder bottom plate is curved, hinged on the body, the work floor swing.

2013年8月15日星期四

Feeder series development of product diversification

Although the level of ordinary agricultural engineering machinery products is not high, but after several years of development, agricultural machinery is moving "from low to

high, from coarse to fine" and diversification, serialization direction, from the initial work only consider action, shoddy, which focus on the development of today

Performance and pay attention to appearance, product quality and manufacturing standards have markedly improved, increasing banana screen satisfaction. As the market continue to be

optimistic, production and sales will continue to increase, further expand the scope of use. Of course, there are a lot of manufacturers and products need to change

Forward and lift motor feeder high. Most agricultural machinery manufacturing enterprises feeder industry strength is weak, due to intense market competition, many companies at

low prices as a means to win the market, leading to lower corporate profits, poor efficiency, the production run is difficult, there are companies constantly stop and turn

Closed. The attractiveness of the market, and continue to have new companies have joined, including some powerful private enterprises crusher, changing patterns of production

enterprises. Next few years, small-scale production, the strength of weak enterprises will gradually decrease; strength, and companies will gradually develop

Growth, product market share increasing feeder for agricultural machinery play a role in promoting development and improvement.

After several years of development, the agricultural machinery market demand and product is constantly changing. Enterprise production and management should be based on market

demand, and actively make our products diversified series of high-end extension of the implementation of product differentiation strategy, small jaw crusher continuously

The development of marketable products, enterprises should win DZG motor feeder differentiated competitive advantage obtained DZG motor feeder. Low-end products dominate the

market, to expand its influence, increasing our market share, high-end products to lead the market trend, to promote the screen machinery product to rapidly improve, so that enterprises

Profits, and promote rapid development of enterprises. Single enterprise products, it is difficult to adapt to market changes, the lack of price competition strategy, this trick

will dominate the market price, is a very small jaw crusher dangerous thing, it will affect the development of enterprises, affecting product water quality and technology

Level increased. With the expansion of rural development and farmers' incomes increase, the demand for agricultural machinery will be differentiated, the highest quality of

agricultural machinery possession ratio will gradually increase.

Scientific control of product quality and increased cost Crusher

       The increase in the production of manufactured feeder feeder and quality assessment of the efforts to control manufacturing costs in the scientific premise, and

continuously improve product quality, performance, improved appearance, make the products at a low cost, high quality participation competition in the market. For the majority

of private

Insufficient levels of production technology, companies should first improve their management level and technical level, increase technical training for front-line staff. Enable

enterprises mainly rely on feeder improve sieving machine management, technological progress, increased productivity and other means to obtain benefits and improve the quality, not

Rely on lower jaw crusher machine cost for profit. Affect agricultural machinery Another important factor is the quality of spare parts, improve the level of domestic

agricultural machinery configuration is a slow process. Therefore, scientific and rational choice fittings are particularly important. Nearly two years of agricultural

engineering

Mechanical rapid development of the domestic emergence of a group of specialized agricultural machinery production for the spare parts manufacturers, most of China crusher camp

individual enterprises, rapid development, technology continues to improve, but there are still many supporting parts quality problems remain constrained improve the quality of

the main bottleneck machine

Need spare parts manufacturers to accelerate technological progress, the rapid increase in quality.

Currently, agricultural machinery should work for feeder object changing characteristics, open jaw crusher hair developed a variety of operating devices, such as hammers, grab,

grapple, transfer holes, etc., to achieve a multi-purpose machine, to maximize efficiency. Agricultural machinery in the rural market, the rapid

Development for producers to bring a rare opportunity, agricultural machinery in terms of product development, or improving the quality of technology and have a lot of work to

study, which also requires manufacturers, mobile screening plant researchers deep into the rural market research to fully understand the development of agriculture for construction machinery

Actual demand. For users in the process reflected the problems and formulate solutions mainframe products of continuous quality improvement, improve product quality and

technical level, demand for the guide, crusher accelerate the pace of product development and improvement, and promote the rapid increase in agricultural engineering machinery

and development.

Screening machine mining industry in recent years has become a star

        In the screening machine and feeder for use on rubber springs, often due to equipment vibration trajectory is a circle or a straight line, so the rubber springs

generally subject to two kinds of compression and shear deformation state. Rubber spring design is based on job requirements, need to identify various dimensions, calculate the

stiffness and strength check. So you can use gravel production line equipment from. The viscoelastic properties of the rubber, to absorb the vibration of the selected frequency

band, therefore, the spring is relatively small noise.
   
        When calculating the rubber spring stiffness, the first to determine the elastic modulus, calculated spring form factor, and then calculate the spring stiffness. When

the stone screening machine work, rubber spring work in dynamic compression deformation state, then said that the relationship between load and strain, called compression dynamic

stiffness. Rubber spring such as working at different temperature conditions, but also the rigidity value by the range of the temperature coefficient m7.
   
         Screening machine used in making rubber springs calculations, shaped to calculate the stiffness of the spring. To more accurately calculate the spring stiffness of the

vibration system, according to the vibration Circular vibrating screen direction angle to calculate the compressive deformation and shear deformation, and then calculate the

corresponding stiffness. The compressed combination of stiffness and shear stiffness vibration system to calculate the stiffness. Rubber springs still need to calculate the

compressive stress and shear stress, the compressive stress is less than the allowable stress of rubber, rubber shear stress is less than the allowable shear stress. The

composite spring is a metal coil springs and rubber spring combination, that is, the surface-treated metal coil spring outside, including a viscoelastic rubber, the composite

spring has a metal coil springs and rubber springs the advantages of both.

Screening machine capacity and efficiency of screening interdependence

        With the growth of sieving time, the screen surface less easily sieve particles; left most "difficult sieve particles," grain size of the material is close to a mesh

size of these particles. These hard particles through the sieve sieve, takes a long time, screening efficiency increases more slowly. Therefore, the length of the screen surface

only within a certain range, to improve screening efficiency work, can not be over-extended length of the screen surface, otherwise the Screen machine bulky structure,

achieving the desired effect.
   
        Screening machine processing capacity and screening efficiency are interdependent, to a reasonable selection. Thus, the width and length of the screen surface to combine

consideration in order to determine a reasonable proportion of the width and length parameters. In general, the length and width of the screen surface ratio of 2 to 3. For

coarse materials, screening, screen surface length is 3. 5 ~ 4m; For medium fine grade material screening, screen surface length of 5 ~ 6m; materials for dehydration and

sculping screening, sieve surface length of 6 ~ 7m; sand vibrating screen of the screen surface can be shorter, the final screening sieve surface should be longer.
   
        All kinds of screening machine width and length to form a series of screening machine type spectrum. Crusher manufacturers believe that screening should pay attention to

the correct choice is very important.

2013年8月13日星期二

Screening machine installation place should be spacious and airy

         Repair screening machine, regardless of the use of the site, or in the assembly plant, screening machine runs in, use a rope around the screening machine 500mm distance

across the region, the general staff not to enter the area. Clean vibrating screen supplier, only in the screening machine is completely stopped state for

. This double roll crusher and different opportunities for cleaning clogged sieve, sieve can tap wooden hammer, so that the material blocking the hole prolapse.
   
        Screening machine installation place, sand washing machine should have the necessary ventilation and dust removal equipment, so that the necessary screening machine

around sanitation. Easy to produce dust for screening materials, screening machine deal will be closed, and dust removal system connections. High-speed rotation of the flywheel

counterweight

, With weights on the pulley firmly fixed to prevent screening machine is running, flying out with weights. In the screening machine running empty, the non-repair personnel

remain in the vibrating sieve surface. Operation and maintenance personnel screening machines, screening machines must learn the technical knowledge, and general mechanical

power

Gas safety technical knowledge.

        Screening machinery parameters and performance testing, usually in the screening machine crushing machine manufacturing is complete, the manufacturing facility to

validate the manufacturing vibration screen parameters and performance to meet the design requirements. Such trials generally known as factory tests. In the use of on-site

screening machine

, The machine is installed, the installation of screening machine for testing the quality of engineering and inspection work of the screening machine performance, but also need

to be tested and performance parameters in order to determine the screening machine kinematics and dynamics parameters and performance, acting on the basis of identified dynamic

load, in order for screening

Machine research and improvement, but also need to make the screening machine parameters and performance of detailed testing work.

Some brief screening machine part parameters



        Screening machine test items according to the purpose and requirements of the different detection, you can choose different content for testing. For example, the factory

test must include measuring the amplitude of the vibration frequency, bearing temperature, noise, make sure the oil level and lubrication, and some factories also measured motor

power and

The natural frequency of the China Vibrating Screen. Screening machine parameters and performance testing, involving vibration measurements and strength measurements specialized areas. If

you need to make in-depth analysis, we can see this specialized books and literature. Here, only the screening machine several main parameters and performance testing for

A brief description.

        Brand cement production lines amplitude measuring the amplitude of the measurement method is the simplest method is widely used. Measure linear trajectory amplitude.

Usually in a thin aluminum plate engraved with a vertical line and a diagonal triangle formed or constituted by the two slashes

Trapezoid. What is the distance between two lines from small to large, or from large to small; amplitude value as the distance of the size of intermediate values, the distance

marked by an integer size. When the measured amplitude, the amplitude of the card affixed to the screen box on the side, with the screen box vibrate together, to see in the size

of the intersection, ie

The amplitude value (double amplitude).
   
       Cement or similar mechanical measuring circle circular trajectory amplitude. It is a thin aluminum plate engraved with if in different diameters and marked with size

circle. When measuring vibration, saw two circles tangent to that circle, is the amplitude value (double amplitude). This and double roll crusher

There are differences. The amplitude of the card, can be used as vibrating screen manufacturers machine measurement of linear motion amplitude.

2013年8月12日星期一

Thermal mineral shaker works

Gridiron excitation using vibration motor as vibration source, so that the material in the sieve was tossed, and forward in a straight line, linear sieve material from the

feeder evenly into the Screen machine feed inlet, a straight line through the multilayer sieve sieve Network produces several kinds of specifications of oversize, undersize,

subdivision

Not from the respective outlet, linear sieve powder, granular materials selection and classification, gridiron widely used in plastics, abrasives, chemicals, pharmaceuticals,

building materials, food, carbon, fertilizer and other industries.

Thermal mineral shaker work, sieve material directly in contact with the high temperature, requiring a good wear resistance, heat resistance, thermal mineral shaker using

biaxial exciter, the motor is not part of the vibration, drag outside by two motors for reverse synchronous rotation, so that the sieve in a linear direction for a cyclical

reciprocating motion

So as to achieve the purpose of a vibrating screening equipment, thermal mineral sieve shaker is made using high temperature alloy steel, heat-resistant side panels and beams

made of high quality stainless steel, the main force plate and side connections, side panels and beams connected by ring groove riveted connections are tight and reliable.

Mine shaker using biaxial exciter, the motor is not part of the vibration, dragged outside by the two motors for reverse self-synchronous rotation, so that a greater screen box

amplitude in a linear direction for a cyclical reciprocating shaker mine has been widely used in metallurgy, mining, coal, ports and other industrial sectors, mainly

At a temperature below 150 ℃ cold sinter grading operations, mining shaker motor can be mounted on the left or right, mine shaker Vibration feeder motor and exciter according to the

installation location of the design and manufacture of a variety of different cold mine vibrating screen.

Sand and gravel production line equipment is widely used in various gravel industry

Sand production line has vibrating feeder, jaw crusher, sand making machine, Linear vibrating screen and belt conveyor and other equipment combination, sand stone production line from

the initial coarse crusher broken, then, sand production line capacity into coarse material by belt conveyors to carry into a crushing machine

Step crushing, sand production line, after crushing stone into the two kinds of stone vibrating sieve, to meet the gravel crusher feed size into the sand making sand.

Sand and gravel production line is a production of construction sand and stone dedicated production line equipment, it is 50% energy saving than traditional sand making machine,

sand production line is defined according to the material type, and produced the finished product, including artificial stone and sand, so also known as sand and gravel

production line, sand production line

In road construction, plant construction and other raw materials, often require public aggregate production line, the set of aggregates production line equipment will be able to

meet both stone and artificial sand production requirements.

Sand and gravel production line equipment suitable for soft or hard and extremely hard materials, crushing, plastic, widely used in various ores, cement, refractories, aluminum

where the soil clinker, carborundum, glass feeder breaker raw materials, mechanism building sand, stone and a variety of metallurgical slag, sand and gravel production line equipment combined

Hammerhead design, simply replace worn hammer section, you can reduce the cost of more than 30% sand and gravel production line equipment dual bulk trays, simple operation, easy

to implement two feeding method conversion.

2013年8月9日星期五

Circular vibrating screen moves round

Circular vibrating screen moves round and round vibrating screen is a number of layers, efficient new shaker. Circular vibrating screen adopt cylinder-type eccentric shaft

vibration exciter and partial block help to crushing plant adjust amplitude, material sieve drip line length, screening specifications, is designed for quarry screening material stone design,

but also for mining,

Coal preparation, mineral processing, building materials, electricity and chemical industries for product grading, reliable structure, strong exciting force, high screening

efficiency, low vibrating noise, durable, easy maintenance, use of safety features.
Gridiron excitation using vibration motor as vibration source, so that the material in the sieve was tossed, and forward in a straight line, the material from the feeder evenly

into the screening machine feed, by multi-screen several kinds of specifications The oversize, undersize fraction, respectively, from the respective exit

Discharge. Gridiron With low energy crusher manufacturer consumption, high output, simple structure, easy maintenance, fully enclosed structure, no dust, automatic nesting, more suitable for

pipeline operations.

Sand and gravel production line is a sand and gravel used in construction of special equipment

Sand and gravel production line is a kind of building sand, stone and special equipment. Sand production line is the feeder, jaw crusher, PCL direct impact crusher, vibrating

screen and high heavy sand washing machine, and the machine is connected with a belt as a line. Gravel production line to produce the sandy granularity

Uniform, high compressive strength, than natural sand, sand hammer breaking production more in line with high standards of building sand requirements.
Sand production line adopts the high-speed rotating wheel thrown stone to 76m / s line speed thrown collision resistant liner, forming a rock stone, stone crushing and screening plant principle

blacksmith. Gravel line the entire process to ensure smooth discharging, reliable, energy efficient, energy-saving than traditional equipment

50%.
Sand gravel production line equipment, work process, in which sets of sand production line, especially the role of the mobile screening plant is very important; in roads, buildings, bridges

and other raw materials process, usually with a total aggregate production line will be able to easily meet artificial stone and sand

While the production requirements.

2013年8月8日星期四

Impact hammer crusher basic structure to determine the parameters

1 the diameter and length of the rotor
The diameter of the rotor body and maximum feed size information. According to the impact theory, particle size and feed hammer proportional to the mass, and with the hammer

effectively combat height (ie the height of the rotor body exposed hammer) are closely related. In addition, taking into account the impact hammer crusher machine work process there is

a certain role when rolling, turning their anger must have sufficient capacity, which requires the diameter of the rotor body with feed particle size increases.

Typically, the diameter of the rotor body and the ratio of the maximum feed size is 2 ^ -4, take small mainframe. The length of the rotor is taken according to the production

capacity of a given size.

Hammerhead
a. hammerhead hammerhead shape and the height of the rotor is exposed h.

Design, hammer face should in principle be the rotation axis of the rotor in order to achieve a positive impact on the material hammer. Taking into account the wear compensation

or hammer weight restrictions, a slight deviation. Hammerhead ends arc surface design should consider the introduction of bite angle a. This paper recommends a 5-100. Too large

bite angle so that the hammer premature wear and reduce the life of the hammer. The arc length is mainly based on the type of hammer weight required strength corresponding

hammer shaft diameter, and take an arm fixed thick. Hammer shaft and arm strength assessment can hammer in working condition in equilibrium when the force is calculated, and

when working with hammer centrifugal force as the payload checking.

Hammerhead exposed rotor body height h that is highly effective in combating the hammer. From the point of impact mining screen effects and hope h large production capacity, especially for

bulk materials, to achieve the desired impact, h is bound to large, in theory, if the force of the impact gob gob right through the center of gravity. Then shocks the best

results. Consideration to the structural design is reasonable, and the power consumption increases, the person must be properly increased. At the same time people can not be too

small, too small h increased the hammer on the material increases the abrasive cutting, it will affect the handling capacity of the crusher exacerbated hammer wear.

Jaw Crusher Symptom

Jaw Crusher hosts a sudden stop
Possible causes:

1) jaw coal crushing plant discharge opening clogged, causing wholehearted blocking material;

2) Drive V-belt sheave rotates too loose, causing the belt to slip;

3) Eccentric shaft adapter sleeve loose, causing the bearing housing on both sides of the rack without gaps, the eccentric shaft stuck, unable to rotate;

4) workplace voltage is too low, the host after experiencing aniseed, weakness broken;

5) bearing damage.


Remedy:

1) Clear the blockage discharge opening mining screen to ensure smooth flow of the material;

2) tighten or replace the V-belt;

3) Reinstall or replace the adapter bushing;

4) alignment workplace voltage, to conform to the requirements of the host operating voltage;

5) Replace the bearing.

2013年8月7日星期三

Jaw Crusher Introduction and Operation


Jaw crusher main working parts is composed of fixed jaw plate and movable jaw plates, movable jaw plate of the fixed jaw plate for a cyclical reciprocating, the material is

crushed between the two jaws. For coarse, medium crushing hard materials and medium hard materials. Of coarse and fine jaw jaw in two forms.

Jaw crusher operation and maintenance points

1, the basic operation

Jaw crusher correct operation is very important. Incorrect operation is often the major cause of the accident. The correct operation of the crushing plantwill also help to

improve production capacity. Correct operation of the device must be in accordance with the operating rules. In large and medium-sized jaw crusher basic operations, for example,

summarized as follows:

1) Preparation before driving

(A) carefully check crusher main parts, such as jaw plate, bearings, connecting rod, thrust plate, rod springs, pulleys and V-belts are in good condition, fastening bolts loose

connections, protective devices such as pulleys, flywheel housings are complete, whether moving parts collide with obstacles.

(2) Check the auxiliary equipment such as feeder, belt conveyor, lubrication station, electrical, instrumentation and signaling equipment is intact.

(3) check whether the materials in the crushing cavity, if there are bulk material crushing chamber must be removed before starting.

(4) Check the eccentric position of the eccentric shaft, when the eccentric shaft at the lower center of rotation, the application such as cranes and winches driven wheel

rotation center of the eccentric shaft to the upper part to start later. With two motor-driven China Vibrating Screen, because of its large starting torque can be started directly.

(5) Check the fuel storage tank lip, fuel shortage should replenish. By car, you should first start the pump until the return pipe with the oil return (usually takes 5-10min),

oil pressure gauge in the normal operating pressure value, in order to start the crusher. In the case of low winter temperatures, then start the pump should be preceded by an

aggregate oil heater switch, so that the oil is preheated to 15-20 ℃ and then start the pump.

2) up and running in the Handling Precautions

(A) prepare work, should be required to drive sequential operation. Start the main motor ammeter should pay attention to the control cabinet, after 30-40s starting peak current,

the current will be reduced to the normal operating current value. During normal operation, the current should also pay attention to a longer time than the specified value.

(2) After the normal operation of the crusher, you can start feeding machine, and according to the size of the block material and crushers functioning, regulating the transfer

belt feeder to change the volume of feed. Typically, the material in the crushing chamber crushing chamber stack height should exceed the height 2/3. The diameter of the block

material is preferably not more than the inlet width of 50% -60%, when the maximum production capacity of the crusher. When feeding larger blocks, it will cause congestion,

affecting the normal production.

(3) To prevent metal objects (such as shovel teeth, track shoes, drills, etc.) into the crusher, in order to avoid damage to the machine, as they pass through the crusher, you

should immediately notify the next post operator promptly removed to prevent access to the second level crushing system and cause an accident.

(4) When the automatic tripping electrical equipment, if unexplained, non-forcible consecutive starts.

(5) the inspection found the tour does not sound normal machine must stop treatment failure, should immediately stop feeding stalled until all the material in the crushing

chamber is discharged, and then stop the main motor, cut off the power and check processing.

3) Stop Precautions

(A) order the production process must stop, first stop the feeder until all the broken material discharged before stopping crushers and conveyors. Allowed to deposit material

crushing cavity, so as not to create difficulties for the next start.

(2) must be in the crusher completely stopped, in order to stop the oil pumps and cooling system. Cooling water should be let go in the winter, to prevent cracking the bearing.

2, inspection and maintenance

1) Check the bearing temperature, bearing temperature does not exceed the general control 60 ℃ (bearing no more than 70 ℃). In the case of the thermometer is not installed,

the available surface of the thermometer to measure the surface temperature of the bearing shell.

2) Check the lubrication system and water cooling system, oil leakage, water leakage, pump running sound and vibration.

3) Check the wear of machine parts and fastening connectors whether there is loosening.

4) regular replacement of lubricants, cleaning lubrication filter.

Solve jaw crusher vibrating one way

A 900 × 1200 jaw crusher for mobile screening plant limestone in the installation and commissioning, we found that the aircraft empty runs, 16t heavy jaw swinging force larger, causing the

thrust plate seat on the impact force is adjusted large, has a great body and the base felt. The thrust plate and the thrust plate between the pad wear is more than normal

level. By adjusting the tension spring, the situation is not improved.
Thus, we add a piece between the adjustment plate and the sheet conveying belt of the same size as the cushion. Power operation, the empty body and foundation felt basically

eliminated, the belt load operation, only in large blocks of limestone broken only when some felt, but much smaller than sand vibrating screen before, cushioning effect is obvious. After running a

station class and found easy adjustment plate channeling them in the adjustment plate above it after welding the two plates, eliminating the problem of adjusting plate sprang.
Through a period of operation, the conveyor belt is still intact, indicating that this digestion vibration method is feasible.

2013年8月2日星期五

Complex swing jaw crusher

How it works:
Moving jaw hanging in the eccentric shaft directly, by the favor of a direct drive shaft. Bottom jaw thrust plate supported by a rear wall of the rack. When the eccentric shaft

rotates, the moving jaw on one hand, fixed jaw for reciprocating swing, but also to a great extent along the fixed jaw up and down movement. Every movable jaw

Point trajectory not the same, the top of the eccentric shaft movement was constrained, close to the arc trajectory, the middle part of the movable jaw, the trajectory of the

elliptic curve, the more elliptical the closer the bottom long side. As these crusher work, each point on the moving jaw trajectory than

More complex, so called complex swing coal screening machine, referred to as complex pendulum jaw crusher (broken jaw).

Compound pendulum jaw crusher advantages and disadvantages:
(A) compound pendulum jaw crusher mobile jaw movement in the upper and lower ends of sync, alternately crushing and nesting, and thus power consumption evenly.
(2) vertical stroke moving jaw is relatively large, which for nesting, especially sticky and wet materials discharged beneficial.
(3) and a simple pendulum jaw crusher compared to the relatively simple structure, light compact, high production capacity.
(4) Since the movable jaw vertical stroke is large, only by extruding the material, but also by part of the grinding stripping effect, increasing the material over Mobile crushing plant, thus

increasing the energy consumption, large dust is generated, jaw plate relatively easy to wear.
(5) compound pendulum jaw crusher in the crushing of materials when moving jaw under immense pressure plot, acting directly on the eccentric shaft. At present such crushers are

made of medium and small.

Other forms of jaw crusher



1 Mixed swing-type (mixed pendulum type) jaw crusher
In order to overcome the simple pendulum jaw crusher and compound pendulum jaw crusher shortcomings, has been mixed trial pendulum Mining vibrating screen, it works: moving jaw and common

security in the eccentric shaft connecting rod, connecting rod head mounted on the eccentric shaft in the middle, and the two axes of the moving jaw is mounted on the rod shell

sides of the head.

Two thrust plate is still supported on the movable jaw and the lower end of the connecting rod and the rear wall of the rack. Moving jaw trajectory of each point is oval with

its major axis inclined in the direction towards the discharge, which makes the material forward, and the material toward the discharge port, improving the discharge conditions,

and improve the production capacity of the crusher

. While moving jaw bottom horizontal swing and vertical swing ratio is a ratio of 0.8, which surpasses compound pendulum jaw crusher reasonable, can reduce the wear of the tooth

plate. Since moving jaw and connecting rod are hanging in the eccentric shaft, the eccentric shaft and the bearing load is large, poor working conditions, easily damaged

. Same structure is also more complex, although the domestic mining machinery manufacturers have made about hybrid swing-type vibration screen, are due to the above reasons are not

promoted.
(2) crushing jaw crusher (thin broken)
The machine is simple pendulum, compound pendulum jaw crusher has been improved, the use of a number of movable jaw and a number of eccentric eccentric shaft structure composed

of columns, running through each of the movable jaw were crushed materials, thereby reducing machine load, and easy to start, running more stable, low energy consumption.

Currently

There pendulum-type crushing jaw crusher and crushing simple pendulum jaw crusher, the crusher working principle is the same prototype, but the length of the inlet increases,

the reduction ratio of up to 5 to 8. This type of fragmentation functions crushing compression strength not more than 250MPa / cm 2 of ores and rocks. Its processing power (

The machine calibration) is crushing medium hardness ores, rocks, loose density 1.6t/m3 prevail

Double roll crusher maintenance and safety technology

Maintenance of the machine is an extremely important regular work, it should be extremely closely with operations and maintenance, etc., should be full-time personnel on duty

checks.
(A) the maintenance of the machine:
1, the bearing
crushing plant bearing shoulder the entire load of the machine, so good lubrication for the bearing life of a great relationship, it directly affects the life of the machine and the

operation rate, which requires injection of lubricating oil must be clean, seal must be good, the machine The main oiling Office (1) transfer

Dynamic bearing (2) roller bearing (3) All gear (4) activities bearing, sliding plane.
2, the newly installed tires prone to loosening must always be checked.
3, pay attention to all parts of the machine is working properly.
4, pay attention to check the wear parts wear, and pay attention to replacement of worn parts.
5, put the event the device chassis plane should go out dust and other materials in order to avoid the machine encounters can not be broken material activities bearings can not

move on the bottom shelf, resulting in a serious accident.
6, the bearing temperature rise, the coal vibrating screen reasons should be eliminated immediately stopped and checked.
7, turning gears in operation should be immediately stopped if the impact of the sound check and eliminate

Crusher steel body and welded body distinction

Crusher same product the same model, the quality is not the same. Crusher into the body and welded steel body, cast steel body is called coal crushing plant entire body is one, steel

castings directly out of the body are one because it is such a device therefore quite durable,

A very long life. The welded steel body is composed by the multi-block, and then manually welded together, so that a much shorter service life of equipment. Welded steel body

and the body in the price gap is large, cast steel body price is relatively high, but the price is much lower welding body. A

Share price of a stock, here to remind you not to be stone feeding machine fooled by the manufacturer's offer, although some manufacturers give you the quoted prices are low, but the quality is

certainly not. In fact, distinguish the difference is very simple, you more consultation several manufacturers, and then listen to their offer, the regular manufacturers offer

Relatively high, while those small plants at much lower prices, the price is too low, or advise you not to buy. Here for everyone to look at the body and welded steel body