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The daily use and maintenance of Teflon mesh conveyor belt

The daily use and maintenance of Teflon mesh conveyor belt published on

Attentions
Teflon mesh conveyor belt is made of glass fiber fabric coated with PTFE resin, and according to the warp and weft are divided into single and double weft. With good performance of high temperature resistance, weather resistance, anti-aging, non-toxic, high strength, fire retardant, good permeability, acid and alkali resistant, widely used in all walks of life. In order to extend its service life, What matters in the use of maintenance procedures need to pay attention to?

In order to extend the service life of the belt, to ensure that the belt in the course of the operation has a good lubrication effect, use according to the use of environmental conditions should be from time to time to supplement or replace the bearing grease, the number of refueling can not be less than 1000 times / hour, oil starvation operation is strictly forbidden. In order to keep the net belt surface clean, the inlet and outlet no debris, should develop equipment maintenance and mesh belt with maintenance rules and regulations, and regularly eliminate the mesh belt and pipe dust and other debris, to keep the environment clean and tidy.

In the course of use, if you find the mesh belt with abnormal sound, motor serious fever, shell charged, switch tripping, can not start and so on, should immediately stop to checking. Teflon mesh belt operation should be prohibited when checking. After the first test run for five minutes, confirm that no abnormal phenomenon can boot. Disassemble and install the mesh belt, need Technical staff in the side to guide.

As the Teflon mesh conveyor belt running may occur deviation phenomenon, so the operation should be in the side of care, in the event of deviation phenomenon can be corrected, and do a good job entrance maintenance records.

Some parts of the conveyor equipment will affect the service life of the mesh belt, so if you want to extend its service life, also need inspect regular for transmission equipment on the driving wheel and the passive wheel and load roller.

Storage mesh belt, if it is open-air storage should be good rain measures, preferably stored in a dry environment, in order to avoid damage to the mesh belt, the mesh belt should be prevented from bumping during storage and handling.

If you want get to know more about Teflon conveyor belt or you want to purchase Teflon conveyor belt, please don’t hesitate to contact us system@corefrp.com. Our people will answer you as soon as possible. Thank you!

How to improve the service life of Teflon Conveyor Belt

How to improve the service life of Teflon Conveyor Belt published on

Teflon conveyor belt in the course of the use of easily has some problems, how to improve its service life?

Rope-type conveyor belt transverse strength is insufficient, At startup, belt wheel will cause the local force of the conveyor belt is too large, causing the conveyor belt to tear. To avoid this problem, to extend the service life of the conveyor belt, can be any of the concave transition of the driving wheel at the wheel umbrella to change the claw belt roller.

To extend the life of the Teflon conveyor belt to prevent early damage, can be achieved by improving the conveyor belt hopper. By improving the hopper at the transfer of the belt conveyor, to increasing hopper the ability of through foreign material by 2.5 times, Long, large foreign body in the transport process is not easy to be stuck between the funnel wall and conveyor belt, and effectively reduce the damage to the conveyor belt, the hopper is improved, the gap between the skirting board and the net belt of the hopper is running in the direction of the conveyor belt, and the material will not be stuck between the conveyor belt and the baffle plate, thus eliminating the damage of the mesh belt caused thereby.

To ensure that the conveyor belt does not appear folded, the phenomenon of the middle of the bulge, to reduce the wear and tear of the conveyor belt surface, can be improved by the conveyor head, tail and intermediate transfer of the transition length and transition method to achieve, but also to avoid the phenomenon of the blanking at the material leakage.

Teflon conveyor belts are consumables, so the use of life is not very long, which requires reasonable use and maintenance in order to extend its service life. Maintenance and maintenance of conveyor belt should be adjusted in accordance with seasonal changes along the correction device, plus sunscreen and winter maintenance and other measures. From the start to the late use should pay attention to maintenance.

Teflon conveyor belt wear and tear how to repair

Teflon conveyor belt wear and tear how to repair published on

Teflon conveyor belt although has the properties of wear-resistant high temperature, but because of the load capacity and running fast, after a long run back and forth, the wear resistance of the conveyor belt will decline, Inevitably there will be wear and tear, glass fiber leakage problems encountered in these problems should be promptly repaired, otherwise the conveyor belt will be scrapped, affecting production schedule. So how to fix it?

Teflon conveyor belt sent wear common repair methods: Rubber patch up method, local rubber vulcanization method and rubber repair rubber covered repair method.

Adhesive patch method has the advantage of fast repair, as long as the subsidy at the polished cleaning adhesive after the cast glue, and then paste the patch even if the patch is good, you can boot run. The patch method is not very reliable, because after 60 ~ 90d operation, the film will fall off, And the use of the patch method, the conveyor belt can not run in a wet environment. Because the water vapor will accumulate in the gap between the bonding surface, rust wire rope, a long time will rust off the rope, or even the entire conveyor belt fracture, and the repair cost is relatively high.

Local vulcanized rubber vulcanization method is to use a small pair of local breakage vulcanized, sulfide by the size limit, repair speed is relatively slow, only 5m / h. So the repair method is not suitable for long-distance repair.

Rubber repair rubber cover method is to two-component polyurethane glue mixed together even after mixing, and then to fill the surface to be repaired, such as 5 to 6 hours after curing, curing will form an elastomer. The time required for general cure depends on the ambient temperature. After curing the appearance of the colloid and the conveyor belt has a good adhesive properties, bonding and sealing performance is very good, does not appear in the film after running off the problem, it will not operate in a wet environment rust off the rope, causing the belt breakage problems. After the repair method adopted, the abrasion resistance is very excellent, and the problem of local wear of the conveyor belt is effectively solved. At present, the repair method is the best effect, effectively extending the service life of the conveyor belt and avoiding the occurrence of broken belt.

Teflon conveyor belt storage usage and maintenance methods

Teflon conveyor belt storage usage and maintenance methods published on

Teflon conveyor belt is made of glass fiber cloth and then coated with a special process Teflon emulsion made of a kind of high temperature conveyor belt. Will inevitably damage the conveyor belt if storage and use of improper maintenance. Then what matters to increase its service life should be paid attention to when storage and use and maintenance process?

When unloading Teflon conveyor belt to prevent the destruction of band-edge, preferably with a crane, and rigging with a rigging beam lifting, not barbaric handling.

To avoid the sun and rain, Teflon conveyor belt should be promptly warehousing, Warehouse must keep clean and dry, warehouse room temperature should be maintained at -15 ℃ ~ 40 ℃. Acid, alkali, oil and organic solvents are prohibited from direct contact, from the heat source device maintained at 1 meter away. Storage should be rolled into a roll placed, can not be folded, if the storage time is too long, should be turned once every quarter.

when used, which should be in accordance with the needs and specific conditions to choose the right type and specifications, different varieties, different specifications, strength, not the same number of Teflon conveyor belt can not be used in conjunction with a group.

In order to improve the reliability and maintain high effective strength, the Teflon conveyor belt joint can adopt the heat vulcanized rubber joint. The diameter of the conveying roller and the minimum pulley diameter of the conveyor belt shall meet the relevant requirements, and no meandering or creeping shall occur, to link the roller, stick flexible, tension should be appropriate.

If the conveyor needs to install the baffle and the installation of clean assembly, to prevent it from wear and tear, the installation should be very careful.

Due to foreign impurities will affect the belt running, resulting in deviation, uneven tension and even fracture, to avoid such problems must  ensure good operation to have a high degree of cleanliness.

In the process of using the process if the early signs of destruction, to prevent adverse results, should be real-time search for the cause, the timely repair of damaged parts.

Applications of Teflon conveyor belt and joint methods

Applications of Teflon conveyor belt and joint methods published on

Teflon conveyor belt has properties of a high temperature resistance, good insulation, corrosion resistance, good air permeability, low coefficient of friction table machine, etc. It is widely used in printing drying belt, UV drying, textile printing, rapid drying Offset, bonders, pine-dryer, high frequency dryer, solvent-based inks, UV series, screen printing, light aircraft, food baking machine belt, garment dyeing and drying of water containing articles and a series of devices. The specific applications are below:

Plastic products welding, Welding cloth; Plastic sheet, film, heat sealing sheet lining; Microwave gaskets, oven tablets, food drying; Flexible compensator, friction material, grinding wheel slices; heat-resistant coating; laminated substrate, insulation dressing; bonding machine belt, transfer printing hot table cloth, carpet adhesive curing conveyor belt, rubber vulcanized conveyor belt, Curing from the type of cloth. Used in the construction of the various sports venues of the roof and Corrosion-resistant coating of various petrochemical pipelines, environmental desulfurization of power plant waste. According to different thickness, which can be used for a variety of drying machinery conveyor belt, adhesive tape, sealing tape and so on. Electrical insulation belt-based, septa, gaskets, washers. High frequency CCL board. Pressure-sensitive adhesive tape base fabric and special processing can be produced after the “anti-static cloth”.

The main joint types of Teflon conveyor belt are soft joint and steel buckle joint, Soft joint commonly known as bullnose joint. Teflon high-temperature cloth joints are docking, lap, thin lap, steel buckle joint and more. No matter what kind of joint, joint process on the life of Teflon conveyor belt has a very important impact, which is not only the conveyor belt itself can affect the material.

To make soft joint, first of all, the two sides of the connector for docking, and the accessories Teflon plugs into the kevlar circle; And then with the side of the high-temperature cloth tile to the other side of the above. When it is tiled, which can cover one side of the bullnose joint, and then use the equipped Kevlar thread with a needle to wear, and the other side of the joints can be sewn on, just need to sew two on it, and also block the bullnose joint so that the material does not extend into the joint. Checking the cover is sewn after the cover is not already covered in the joint above, to ensure that the operation will not be set off.

The effect analysis based on ADAMS Teflon conveyor chain polygon

The effect analysis based on ADAMS Teflon conveyor chain polygon published on

Car interior pieces including the car roof and interior carpet, its production line as Figure 1 by shows, which conveying track part used special fluoride Dragon with form, car roof and car carpet by with material for GFP Board or MA felt board, size: 2650mm*1700mm (long * wide), weight 900~1400g or 1500~1900 a, transfer device maximum transfer trip 7200mm, transfer speed range: 300~600 mm/s, it guarantee transfer device stable speed 500 mm/s. Teflon transmission requires dynamic stability, large power, carrying load adaptability is strong, and can be applied to high temperature working environment.

The line high speed feeding system adopts chain drive, not Teflon belt transmitting power. Due to chain drive inherent in the polygon effect, will make an impact on chains and sprockets, vibrate and periodic variation of speed and noise, it will affect the chain drive and big implications for the normal production.

In order to study the polygon effect of chain drive that Teflon belts work, determining their impact factor, aiming at the sprockets and chain gearing mechanisms, modeling and simulation with SolidWorks software, can directly reflect the movement of the chain, finally into ADAMS for simulation, simulation results can be used in Teflon belt optimized design of chain drive.

Polygon effect
As shown in Figure 2, chain and sprocket contacts could not completely meet the sprocket pitch trajectory.
From a geometrical point of view, positioning sprocket radius R, chain and sprocket after chain angle θ from a match turned, theory of displacement as: St= Rθ
Wheel rotation actually make up circular motion meshing with the chord movements alternating movements, chain movement phase linear displacement is equal to the string on the sprocket pitch cogging chord length, namely: Sf= 2sinθ/2R
The deviation of St and Sf is defined as ΔX=St-Sf.
This phenomenon is the chain drive sprocket polygon effect.

Chain sprocket Assembly modeling and motion simulation
Chain uses 16A double row of chain and the size standards adopted GB/T1243-1997, the chain track by automobile roof line, teflon conveyor belt slewing mechanism as a template, assembly molding.

Using SolidWorks to create whole body trajectory model (see Figure 3a). In order to simplify the model, set up Rotary sprocket pitch 98.13mm-Agency, inner-60.96mm. Swivel included both 180 ° and 90 °.

Finally build constraint for add drive sprocket wheel, keep the sprocket angular velocity is 10 ° / s, the movement simulation results was observed.

When the number of sprocket teeth less than 13, asymmetry and carries the load of the movement increased, as shown in Figure 4, the sprocket tooth number 12 when the dynamic load effects significantly greater than 15 of the sprocket teeth transmission. Gear transmission ratio unchanged when greater than 25 cases structure overall size is too large, do not conform to the actual application. Sprocket chain motion non-uniformity besides is directly related to the sprocket teeth, also is related to the sprocket center distance.

In order to analyze in detail the change of the load effect of the polygon effect in chain drive,the detailed data model is established, the above established SolidWorks model is simplified to single driving wheel driven wheel drive, the chain still USES 16 a double row of chain structure (as shown in figure 5).Due to the complexity of chain transmission model, kinematic and dynamic analysis was carried out on the chain, to simplify the analysis model. To simplify the SolidWorks model definition, processing with imported ADAMS software.

ADAMS polygon effect analysis
Chain drive model simplification and assumption
Teflon conveyor belt with chain drive of this paper is very complex, it is difficult to direct modeling in dynamic simulation software ADAMS, so using SolidWorks models have become a Parasolid file and then transfer to ADAMS. In the Parasolid file transfer process, the model information is lost (such as datum points and Datum coordinate systems, and so on). In addition, the simulation must be all new Marker in ADAMS, while dealing with a contact problem between the entity and entities, directly using SolidWorks models will be complex and long simulation time. Due to too many links, define the spin pair and contact one by one, will use a simplified chain model (see Figure 5).

According to the different location of interaction between link and sprocket, it is divided into three regions as shown in figure 6, and model reduction. Due to region a chain sprocket tooth contact at first, will have a relative velocity, resulting in a larger impact and dynamic load, and the contact force is relatively large. This part link have most influence on the dynamic characteristics of the system, it cannot be simplified. In area B, chain and sprockets continuous contact, in the steady-state phase, should be simplified. Regional chains in the C section, contact force is small, it also simplified.

To speed up the simulation process in ADAMS simulation model considers only rotating friction between the chain and does not take into account other friction, skidding and air resistance, and so on. The simulation results show: dynamic characteristics of simplified models in the analysis remain essentially the same as the original model, this model is reasonable. The model effect of ADAMS as shown in Figure 7.

Simulation results analysis
Figure 7 shows the model simulation analysis, Figure 8 describe a changes curve that a chain section from tight side NIE into to NIE out active round process in the contact force, it reflect superior contact force which only in near tight side of several chain section, chain section of location more near Pine side is contact force more small and reduced range is big, while showed that model simplified reasonable.

Here in the center line of the chain lower rate to measure the amount of fluctuation in sprocket and chain polygon effect of reduction is:
η=λ-ζ/λ*100%

In the formula: λ=p/2(1/sin(z/π))-(1/tan(z/π)),ζ is actual volatility, p is chain pitch.
Figure 9 respectively traditional linear tooth profile sprocket drive wheel in three critical speed 5 ° / s, 10 ° / s, 15 ° / s chain plate center of vertical center line change curve.

Figure 9 shows that changing chain plate center, in a fluctuating state, by observing the center of the chain plate can get chain fluctuation changed circumstances. Figure 10 depicts the 1 ~ 15 ° / s chain fluctuation quantity change trend.

Figure 11 is when 5 ° / s and 15 ° / s,the over time variation diagram of two drive meshing impact results.

When the tooth profile of the sprocket is different, the magnitude of the meshing impact force also changes. Figure 12 shows that, with the increasing of speed, increasing the impact between the chain and sprocket.

Conclusion
Teflon conveyor belt is studied in this paper with a chain of citations, the structure design and calculation of chain drive, primarily chain and sprocket selection, etc. In accordance with the chain transmission structure and components in SolidWorks establish digital model, and analyze the polygon effect theory. Finally will simplify the SolidWorks model into ADAMS, modeling, add motion pair and get after motion dynamics simulation model, simulation results help chain polygon effect after optimization design. Commonly used composite tooth profile sprocket, etc to minimize driven wheel angular velocity fluctuations, reduce the polygon effect.