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Expanded polystyrene (EPS) worm gear and preparation method thereof

A technology of worm gear and skeleton layer, which is applied in the direction of mechanical equipment, belt/chain/gear, portable lifting device, etc., and can solve the problems of inability to achieve light weight and long molding cycle

Pending Publication Date: 2021-05-18
株洲时代工程塑料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main processes for preparing EPS worm gears: casting and injection molding. Casting molding can cast the tooth shape of EPS worm gears. Although cast EPS worm gears perform well in terms of wear resistance and service life, they cannot achieve lightweight; injection molding EPS worm gears The main material is PA66. Compared with casting, its wear resistance and fatigue life have a long distance, and the molding cycle is long.

Method used

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  • Expanded polystyrene (EPS) worm gear and preparation method thereof
  • Expanded polystyrene (EPS) worm gear and preparation method thereof
  • Expanded polystyrene (EPS) worm gear and preparation method thereof

Examples

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preparation example Construction

[0052] The present invention provides a kind of preparation method of the EPS worm gear described in the above technical solution, comprising:

[0053] The outer ring of the worm wheel is prepared by reaction injection molding;

[0054] The reinforced material is filled between the outer ring of the worm wheel and the metal shaft for injection molding to form a skeleton layer to obtain the EPS worm wheel.

[0055]The present invention has no special limitation on the specific technical process of the reaction injection molding, and the outer ring of the worm wheel can be prepared by using a specific method of reaction injection molding well known to those skilled in the art. The technological process of reaction injection molding in the embodiment of the present invention is as follows figure 1 shown.

[0056] In the present invention, the method of reaction injection molding preferably includes:

[0057] Material A and material B are injected into the mold after high-speed...

Embodiment 1

[0072] The caprolactam of 50 parts by weight, the sodium caprolactam (catalyst) of 0.1 part by weight, the glass fiber (reinforcing material) of 5 parts by weight, the PTFE micropowder (wearing agent) of 15 parts by weight is put into reactor A, 50 parts by weight of Caprolactam, 5 parts by weight of block compound (prepared by polytetramethylene glycol and hexamethylene diisocyanate, number average molecular weight is 12000) is put into reactor B; The material is heated to 120°C, and the moisture in the system is replaced by nitrogen replacement, under nitrogen protection, waiting for reaction injection molding.

[0073] Connect the nozzle of the reaction injection molding machine to the injection port of the EPS worm wheel outer ring mold, and the materials in the reactor A and reactor B are injected into the cavity of the mold after high-speed collision and mixing in the mixing chamber of the reaction injection molding machine, and the mold is kept The temperature is 150°C....

Embodiment 2～7

[0076] The EPS worm wheel was prepared according to the method of Example 1, and the difference from Example 1 was that the preparation was carried out according to the amount of raw materials in Table 1.

[0077] The consumption ratio (parts by weight) of each raw material in the embodiment of table 1

[0078]

[0079]

[0080] Note: Caprolactam and laurolactam in Table 1 are parts by weight of total caprolactam and laurolactam in reactor A and reactor B, and the quality of caprolactam and laurolactam in reactor A and reactor B The ratio is 1:1.

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Abstract

The invention provides an expanded polystyrene (EPS) worm gear. The EPS worm gear comprises a metal shaft, a framework layer and an abrasion-resistant layer, wherein the framework layer is arranged on the outer layer of the metal shaft; the abrasion-resistant layer is arranged on the outer layer of the framework layer; the framework layer is made of reinforcing materials, and the reinforcing materials comprise nylon materials; and the abrasion-resistant layer is a worm gear outer ring prepared by a reaction injection molding method. The EPS worm gear is prepared from reaction injection molding nylon, the advantage of abrasion resistance of casting nylon can be combined, light weight can be achieved, the molding period is short, and far-reaching significance is achieved; The abrasion-resistant layer of the EPS worm gear is prepared from the reaction injection nylon, PA6 or PA66 fibers are used as the reinforcing materials, the prepared EPS worm gear product is good in abrasion resistance, long in service life and short in molding process, and tooth shapes can be formed. The invention further provides a preparation method of the EPS worm gear.

Description

technical field [0001] The invention belongs to the technical field of worm gears, and in particular relates to an EPS worm gear and a preparation method thereof. Background technique [0002] The EPS worm gear is the core component of the electronic power steering. At present, the main material for preparing the EPS worm gear is the composite of plastic parts (wear-resistant layer) and metal, and there are also all plastics; the inner layer of the EPS worm gear structure is a skeleton, which can be made of metal materials or It can be made of glass fiber reinforced nylon material, and the outer layer is a wear-resistant layer, mainly PA66, PA12 or cast nylon. There are two main processes for preparing EPS worm gears: casting and injection molding. Casting molding can cast the tooth shape of EPS worm gears. Although cast EPS worm gears perform well in terms of wear resistance and service life, they cannot achieve lightweight; injection molding EPS worm gears The main materi...

Claims

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Application Information

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IPC IPC(8): F16H55/22F16H55/06C08L77/02C08L27/18C08L75/04C08K7/14C08J5/04B29C45/14
CPCF16H55/22F16H55/06C08J5/043B29C45/14C08J2377/02C08J2427/18C08J2475/04C08K7/14
Inventor 郑梯和袁绍军胡天辉陈碧帆黄伟伟
Owner 株洲时代工程塑料科技有限责任公司
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