The heat-resistant conveyor belt has a short residence time in the plasticizer, so it is not appropriate to plasticize the plasticizer. The factors affecting the overall effect of the tape plasticizer are the speed of feeding and the plasticizing temperature. The rubber pore size and baking quality are as follows:
When using a plastic screw smelting machine, the raw rubber block temperature must be controlled at 70-80°C, the minimum temperature must not be lower than 60°C, the temperature of the plastic block should be uniform, plastic smelting operation can be smooth, plastic smelting effect is large, and production efficiency is high. High and even plasticity, the temperature of the feed plastic block is low, not only the equipment load is too high and easy to damage, and the plasticizer plasticity is low and uneven, the temperature of the plastic block is uneven, and the quality of the plasticizer is also uneven;
Feeding speed The feeding speed should be appropriate and uniform, the speed is too fast, the residence time of rubber in the barrel is too short, the degree of plasticity is not enough, and it is also easy to be uneven, resulting in clip phenomenon. Too slow speed not only reduces the production efficiency, but also May cause excessive refining, damage the physical and mechanical properties of the rubber material, uneven feeding speed, and the plasticity and quality of the plasticized rubber belt covering rubber will also be uneven, so the feeding speed must be maintained properly and uniformly throughout the plastication process. If the plasticizing temperature is too low, the equipment load is too large, the plasticity of the plastic compound is also low and non-uniform, and if the temperature is too high, the macromolecular chains are oxidized and degraded and the quality of the rubber material in the conveyor belt is impaired, so the plasticating temperature must be Strictly controlled in a proper range, and the temperature of the front and back parts of the mechanical drum is reasonably distributed, the natural rubber plastics refining temperature is generally controlled at the tail 60 °C, the fuselage 80-90 °C, nose 90-100 °C, Below 180°C, the temperature of plastic rubber must be kept stable, otherwise it will fluctuate.
The size of the rubber drain is determined by the plasticity of the rubber. The porosity is small, the speed of rubber row and the amount of glue to be discharged are reduced, and the residence time of the rubber material in the cylinder is long. The heat-resistant rubber conveyor belt covers the rubber material up and down. The plasticity is too large, the production efficiency will be reduced, on the contrary, the rubber pores increase, the rubber volume increases, the production capacity increases, but the plastic material in the barrel of the residence time is shortened, the plasticity of the plasticity is low and Inhomogeneous, when the rubber extruding machine has the smallest void size, the final plasticity of the plastic compound can reach 0.38-0.43.
The plasticizing properties of industrial conveyor belt rubber also have good results, and it is easy to obtain the required plasticity. In the synthetic rubber, isoprene rubber and chloroprene rubber are relatively easy, nitrile rubber is the most difficult to plasticize, natural rubber and synthetic rubber. It has different plasticizing properties from natural rubber and needs to be given full attention. Although the viscosity of synthetic rubber is similar to that of natural rubber at low temperature and high temperature plasticity, the effect is far lower than that of natural rubber. When the plastic melts at a high temperature at °C, gels are easily generated. In general, synthetic rubber is more difficult to plasticize than natural rubber.