Production process and products of EPDM microporous backing plate

Abstract

The invention discloses a production process for an ethylene propylene diene monomer microporous base plate. The production process comprises the following steps: adding ethylene propylene diene monomer into a kneading machine to knead, and then adding zinc oxide, stearic acid, carbon black, a moisture absorbent, an acid and alkali regulator, a softening agent and an inorganic filler into the kneading machine to knead, thereby preparing a master batch; adding the prepared master batch into an open mixing machine, adding a vulcanizing agent, a promoter, a foaming agent and a foaming aid, uniformly mixing, regulating roll spacing to 0.8-1.3 millimeters for thin-passing, carrying out triangular packaging for 3-4 times, regulating the roll spacing to 5-6 millimeters for discharging, so as to prepare a rubber compound, and standing the rubber compound for not smaller than 16 hours; putting the rubber compound on a cutter for cutting; feeding prepared rubber strips into a cold feeding extruder to extrude; sequentially feeding the prepared rubber strips into a high-temperature section, a microwave section and an oven section to carry out continuous vulcanizing until complete vulcanizing; and pulling the prepared vulcanized rubber into the cutter through a pulling machine, and cutting the prepared vulcanized rubber into a needed dimension, thereby obtaining a microporous base plate finished product. The invention further provides an ethylene propylene diene monomer microporous base plate.

Description

technical field [0001] The invention belongs to the technical field of microporous rubber production, and in particular relates to a production process of EPDM microporous pads and products thereof. Background technique [0002] The elastic support block track structure is a low-vibration under-rail foundation. The double-layer elastic system is composed of the microporous rubber backing plate under the support block and the rubber backing plate of the fastener under the rail, so that the combined stiffness of the track is close to that of the ballasted track. Improve the elasticity of ballastless track. [0003] At present, most of the microporous rubber backing plates under the support blocks are EPDM microporous backing plates. Because EPDM rubber has excellent resistance to oxidation, ozone and erosion, it is used in increasingly complex rail transit lines. The demand for its use will increase. In the prior art, the production process of the EPDM microporous backing pl...

AI Technical Summary

Problems solved by technology

In the prior art, the production process of EPDM microporous backing plate is mainly molded on a vulcanizing machine, which has disadvantages such as low production efficiency, high investment cost, poor product structure applicability, and high labor intensity. , and the overall performance of the vulcanized microporous backing plate needs to be improved to meet the vibration reduction requirements of low-vibration under-rail foundations in increasingly complex rail transit lines

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