Nylon 6 special for low-noise, self-lubricated wear-resisting injection molding gear and preparation process thereof

Abstract

The invention relates to an organic polymer composite material, in particular to a nylon 6 special for a low-noise, self-lubricated wear-resisting injection molding gear and a preparation method thereof. The nylon 6 consists of the following components in percentage by weight: 49.5-90 percent of nylon 6, 3-35 percent of cross-linking wear-resisting agent, 3-35 percent of nylon 6 powder, 0.3-1.5 percent of antioxidant, 0.3-3.0 percent of heat stabilizer and 0.3-5.5 percent of other addition agents. By the nylon 6 special for the low-noise, self-lubricated wear-resisting injection molding gear and the preparation method thereof, gears with different sizes can be rapidly produced by adopting an injection molding mode; the gear produced by the material has the characteristic of effectively eliminating noise when being used together with a metal gear, simultaneously has better self-lubricating and wear resisting performances and cannot fall off powder dust caused by wear, thereby providing longer service life.

Description

technical field [0001] The invention relates to an organic polymer composite material, and more specifically relates to a low-noise self-lubricating and wear-resistant nylon 6 special for injection molding grade gears and a preparation method thereof. Background technique [0002] Nylon 6 is one of the most widely used engineering plastics. Its amide group is polar and has a strong hydrogen bond in its structure, which makes nylon 6 have a high melting point and good physical and mechanical properties. And wear resistance and self-lubricating properties, these comprehensive characteristics are not available in other plastics. However, ordinary nylon 6 has high water absorption, low impact strength before water absorption, sharp drop in rigidity after water absorption, and unstable dimensions, which limit the application of nylon 6, which in turn reduces the material selection room for design engineers in downstream industries. Therefore, research on compound modification of...

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Problems solved by technology

Therefore, it has caused serious troubles to many export enterprises in my country.

At the same time, since nylon 6 is a crystalline material, it is easy to generate large internal stress during molding, which leads to uncertainty in the performance of the finished product

At the same time, for components such as gears, the many advantages of ordinary nylon 6 are favored by designers, but the above shortcomings are very troublesome, especially when it comes to the requirement that the friction sound generated during gear operation can be effectively and greatly reduced. At the same time, the raw material It has strong wear resistance and can be used under harsh conditions where the temperature is sometimes high and sometimes low

The raw materials with the above functions currently available on the market are either expensive such as nylon 12, or are added with expensive additive materials such as polytetrafluoroethylene, which also leads to high material costs.