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Preparation method for piston by powder injection molding

A powder injection molding and piston technology, which is applied to other manufacturing equipment/tools, mechanical equipment, engine components, etc., can solve the problems of complex three-dimensional shape of the piston, waste of output, and affecting product performance, etc.

Inactive Publication Date: 2016-01-27
NINGBO YUXIN METAL POWDER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Part of the traditional three-dimensional complex piston is made of YG6X tungsten steel. The production needs to be invested through a series of equipment, such as machining centers, punching machines, milling machines, precision punching machines, wire cutting, etc., requiring a lot of equipment and labor. , there is the problem of high production cost, low output and low waste of resources, especially because the three-dimensional shape of the piston is complex, so the processing difficulty is high. The metal powder injection molding process can solve the above problems well, but the metal powder injection molding process is due to the problem of degreasing rate. It is easy to affect the performance of the product

Method used

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Embodiment Construction

[0014] A detailed description will be given below of specific embodiments of the present invention.

[0015] The preparation method of the piston of powder injection molding, the steps include the following steps in sequence:

[0016] (1) Granulation, the metal powder and the binder are blended through a banbury mixer, the banbury temperature is 180 degrees, and after 3 hours of banbury mixing, natural cooling is obtained to obtain the fluidity of the pellets, which are extruded by a screw extruder. Granules become rheological pellets; according to the mass ratio of pellets, the metal powder is 93.5%, and the binder is 6.5%; the metal powder is mixed by the following components according to the mass ratio: Co5.98%, C5. 45%, TaC1.31%, Ti0.03%, the balance is Wc, Wc is tungsten carbide, TaC is tantalum carbide; the binder is made by mixing the following components: the binder is made by mixing the following components Composition: palm wax 15%, vinyl acetate 4%, stearic acid 2%...

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Abstract

The invention relates to a preparation method for a piston by powder injection molding. The preparation method for the piston by powder injection molding sequentially includes the following steps of pelletizing, wherein metal powder and a binding agent are mixed through an internal mixer to form granules with the rheological property; injection molding, wherein the granules are injected into a mold cavity in the piston shape to form a blank; degreasing, wherein part of the binding agent in the blank is removed, and a degreasing solvent is aviation kerosene; and sintering, wherein the binding agent is removed, and the piston is obtained. The preparation method for the piston by powder injection molding has the beneficial effects that the degreasing rate is high, product performance is good, and the production cost is low.

Description

technical field [0001] The invention relates to a method for preparing a metal powder injection molded piston. Background technique [0002] Part of the traditional three-dimensional complex piston is made of YG6X tungsten steel. The production needs to be invested through a series of equipment, such as machining centers, punching machines, milling machines, precision punching machines, wire cutting, etc., requiring a lot of equipment and labor. , there is the problem of high production cost, low output and low waste of resources, especially because the three-dimensional shape of the piston is complex, so the processing difficulty is high. The metal powder injection molding process can solve the above problems well, but the metal powder injection molding process is due to the problem of degreasing rate. It is easy to affect the performance of the product. Contents of the invention [0003] The object of the present invention is to provide a method for preparing a powder i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F1/00B22F5/00C22C29/08
Inventor 肖军
Owner NINGBO YUXIN METAL POWDER TECH CO LTD
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