Preparation method of vibration-damping sponge base plate for high speed railway

Abstract

The invention relates to a preparation method of a vibration-damping sponge base plate for a high speed railway. The method comprises the following process procedures: step 1, mixing so as to form mixed glue: placing glue stock in a internal mixer for mixing so as to form the mixed glue, wherein the glue stock is composed of the following raw materials in parts by weight: 80 parts of natural glue, 20 parts of ethylene propylene diene monomer (EPDM), 5 parts of zinc oxide ZnO, 50 parts of carbon black 550, 2 parts of antiager 4010 NA, 1 part of antiager RD, 2.5 parts of sulfur, 1.5 parts of vulkafor DM and 0.2 part of vulkafor TT; step 2, extruding so as to form a material blank: placing the mixed glue prepared in the step 1 in a screw extruder for extrusion so as to form the material blank; step 3, mould pressing and vulcanization molding: placing the material blank prepared in the step 2 in a flat vulcanizer for mould pressing and vulcanization molding so as to prepare a sponge base plate; and step 4, punching and cutting: punching the sponge base plate prepared in the step 3 so as to form the finished vibration-damping sponge base plate product. The vibration-damping sponge base plate has the advantages of good weather resistance, good hydrolysis resistance, good train travel comfortableness and low cost, and is environmentally-friendly.

Description

technical field [0001] The invention relates to a preparation method of a damping sponge backing plate for a high-speed railway. It belongs to the technical field of rubber and plastic products. Background technique [0002] Since the running speed of high-speed railway reaches more than 200km / h, polyurethane backing plate is mostly used as its vibration damping pad in the past. And there are following deficiencies in the polyurethane backing plate: [0003] 1. Poor weather resistance [0004] The vibration-damping pads are laid in the open air, exposed to the sun and rain for a long time, due to the poor weather resistance of polyurethane, the performance drops rapidly, and cannot maintain its performance for a long time under harsh climatic conditions. [0005] 2. Poor hydrolysis resistance [0006] Polyurethane will be broken due to the hydrolysis of the polyester chain segment when it meets water, so the safety of the polyurethane backing plate used in the open air i...

AI Technical Summary

Problems solved by technology

[0003] 1. Poor weather resistance

[0004] The vibration damping pads are laid in the open air, exposed to the sun and rain for a long time, due to the poor weather resistance of polyurethane, the performance declines rapidly, and cannot maintain its performance for a long time under harsh climatic conditions

[0005] 2. Poor hydrolysis resistance

[0006] Polyurethane will be broken due to the hydrolysis of the polyester chain segment when it meets water, so the safety of polyurethane pads used in the open air is poor

[0007] 3. Poor driving comfort of the train

[0008] Due to the insufficient stability of the polymerization process of the polyurethane backing plate, the performance of the product fluctuates greatly, so the static stiffness and dynamic-static ratio fluctuate greatly, and the hysteresis is also large. After laying on the railway, the train will experience great bumps when passing by, which cannot provide passengers with a comfortable ride. car environment

[0009] 4. High cost and not environmentally friendly

[0010] The main material of polyurethane backing plate is isocyanate and polyol, its price is high, and the raw material is toxic, which is harmful to the operator, the three wastes in raw material production are not small, and the environmental protection is poor