Resin and plastic belt pulley and its manufacturing method

Abstract

Disclosed is a resin and plastic belt pulley and its manufacturing method, wherein the belt sheave includes an inner layer and an outer layer, the outer layer is made of materials including phenol resin, inorganic powder, fortifying fiber and demoulding agent. The inorganic filler is preferably nano silicon oxide, the fortifying fiber is preferably glass fiber, the phenolic resin is preferably linear phenolic resin or soluble phenolic resin.

Description

technical field [0001] The invention relates to a pulley and a manufacturing method thereof, in particular to a double-resin plastic pulley used in the surrounding areas of an engine and is easy to recycle and a manufacturing method thereof. Background technique [0002] Generally, there are two main types of pulleys for vehicles: steel pulleys and plastic pulleys. Steel pulleys are gradually being replaced by plastic pulleys due to weight and noise. The material of the plastic pulley is generally glass fiber reinforced resin material, and the resin can be phenolic resin and nylon, etc., and phenolic resin is a thermosetting material, which is difficult to recycle, and the glass fiber reinforced phenolic resin must be cured at the same time, reducing the Production efficiency; Nylon is a thermoplastic material and is easy to recycle. Glass fiber reinforced nylon can also be processed by ordinary injection molding, but its dimensional stability, wear resistance and heat resi...

AI Technical Summary

Problems solved by technology

The material of the plastic pulley is generally glass fiber reinforced resin material, and the resin can be phenolic resin and nylon, etc., and phenolic resin is a thermosetting material, which is difficult to recycle, and the glass fiber reinforced phenolic resin must be cured at the same time, reducing the Production efficiency; nylon is a thermoplastic material, easy to recycle, glass fiber reinforced nylon can also be processed by ordinary injection molding, but its dimensional stability, wear resistance and heat resistance are not as good as glass fiber reinforced phenolic resin

[0003] Report in Japanese patent JP8-159244, add a kind of inorganic powder in calcium carbonate, clay and wollastonite, and the resin pulley that mica powder and glass fiber are formed in phenolic resin, because the inorganic powder shown above and mica powder Poor wear resistance, especially in dusty atmospheres

The glass fiber reinforced phenolic resin pulley described in Chinese patent 03157726.1 has good dimensional accuracy, high strength and excellent wear resistance. Novolac or resole phenolic resin is selected, and its number average molecular weight should be limited between 600 and 900. , but it is difficult for injection molding, and phenolic resin is a thermosetting material, which is difficult to recycle, and glass fiber reinforced phenolic resin must be cured after injection molding, which affects its processing performance

Therefore, although the phenolic resin plastic pulley has realized the weight reduction of the pulley, it is difficult to recycle, and it is not easy to form and process

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