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Product of foaming-type polyurethane shock pad and manufacturing method thereof

A manufacturing method and vibration damping pad technology are applied in the manufacturing method and product field of high-speed locomotives used as vibration damping components, and can solve problems such as poor weather resistance, poor wear resistance, and poor oil resistance.

Active Publication Date: 2013-01-09
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is mainly aimed at the existing rubber elastic damping pads with poor wear resistance, low heavy load fatigue resistance, unobvious vibration damping effect, poor oil resistance, poor weather resistance and unsatisfactory aging performance, and propose a

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0017] The polyether polyol mixture is used as the main material, water is used as the foaming agent, and NCO-terminated high-density isocyanate is used as the crosslinking agent. The specific steps are as follows:

[0018] 1) Preheat material A in an oven at 45-90°C to remove its crystallization state, the purpose is to make material A have good fluidity and reach the curing temperature; place material B in an oven at 55-100°C to preheat Heat, its purpose is to make material B have good fluidity and reach the curing temperature;

[0019] 2) Put the pretreated material A and material B in step 1) in the insulation tank of the production line, adjust the temperature and stir the materials A and B separately, and set the temperature and pressure parameters of the insulation tank as follows:

[0020] Material A is 25~55℃ and 0.1~0.5MPa, material B is 35~65℃ and 0.1~0.5MPa;

[0021] 3) Put the insulated materials A and B in step 2) into the low-pressure insulation tank for produc...

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Abstract

The invention provides a product of a foaming-type polyurethane elastic shock pad and a manufacturing method of the product. The method is characterized in that a polyether glycol mixture ( material A for short) is used as a main material, and prepolymer slurry based on diphenylmethane diisocyanate (MDI) ( material B for short) is used as a curing agent and water is used as a foaming agent. The method comprises the steps of: adding material B and water into material A, preheating materials A and B, uniformly mixing materials A and B under the conditions of a vacuum environment and high-speed stirring, and casting to obtain the final product. The prepared product has a change rate of static stiffness of less than or equal to 20% after a fatigue test for 4000000 times and a ratio of dynamic stiffness to static stiffness of less than or equal to 1.3, and the product has an obvious damping effect, good resistance to wear and oil, and excellent anti-aging property. The whole manufacturing process is high in automation degree and safe, and the product has stable quality.

Description

technical field [0001] The invention relates to a product and a manufacturing method of a foamed polyurethane damping pad, in particular to a manufacturing method and a product of a high-speed locomotive used as a damping element. Background technique [0002] With the increasing development of the national economy, higher requirements are put forward for railway transportation, which requires high speed, safety and comfort, and requires that railway equipment and accessories have good performance and long service life. Therefore, in order to meet the requirements of the development of high-speed railways, high requirements are put forward for the performance indicators of the damping pads under the railway tracks. At present, domestic railway rail transit usually uses rubber sleeper pads, but its physical and mechanical properties are low, weather resistance is poor, and its service life is short. Especially in the application of high-speed locomotives, the use performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/32C08J9/08C08L75/08
Inventor 蒋集成张友南刘刚李斌姚春勇
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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