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Method for preparing special-shaped complex part through powder injection molding technology

A technology of powder injection molding and complex parts, which is applied in the manufacture of tools, ceramic molding machines, etc., can solve the problems of deformation, collapse and fracture of parts, and achieve the effect of high precision, better quality and complex appearance

Active Publication Date: 2015-12-02
SHENZHEN ELEMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that, in order to overcome the defect that the special-shaped complex parts are prepared by powder injection molding technology during the degreasing and sintering process, the parts are deformed, collapsed, or even broken. Provides a method for preparing special-shaped complex parts using powder injection molding technology

Method used

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  • Method for preparing special-shaped complex part through powder injection molding technology

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The preparation of embodiment 1Cp-Ti special-shaped complex parts

[0032] S1. Mixing and granulation: mix 55% Cp-Ti powder with volume fraction of 45% binder (the mass ratio of binder is paraffin:polyethylene:stearic acid=36:60:4) Blend in the mill at 160°C for 2 hours; then pass through the granulator to form granular feed;

[0033] S2. Injection molding: inject the feed material obtained by mixing into the mold of special-shaped complex parts and conformal support parts through the injection machine, the injection temperature is 160 ° C, the injection pressure is 110 MPa, and the injection mold temperature is 80 ° C to obtain the green body of special-shaped complex parts and Conformal support parts green body;

[0034] S3. Degreasing and sintering: degrease the green body of special-shaped complex parts and the green body of conformal support parts by combining solvent degreasing method and thermal degreasing method, first degrease with n-hexane solution at 60 °C f...

Embodiment 2

[0035] The preparation of embodiment 2 Cp-Ti special-shaped complex parts

[0036] S1. Mixing and granulation: mix 55% Cp-Ti powder with volume fraction of 45% binder (the mass ratio of binder is paraffin:polyethylene:stearic acid=36:60:4) Blend in the mill at 160°C for 2 hours; then pass through the granulator to form granular feed;

[0037] S2. Injection molding: inject the feed material obtained by mixing into the mold of special-shaped complex parts and conformal support parts through the injection machine, the injection temperature is 160 ° C, the injection pressure is 110 MPa, and the injection mold temperature is 80 ° C to obtain the green body of special-shaped complex parts and Conformal support parts green body;

[0038] S3. Degreasing and sintering: Degrease the green body of special-shaped complex parts and conformal support parts by combining solvent degreasing method and thermal degreasing method, first degrease with n-hexane solution at 50 °C for 24 hours, and ...

Embodiment 3316

[0039] Example 3316 stainless steel special-shaped complex parts injection molding

[0040] S1. Mixing and granulation: 316 stainless steel powder with a volume fraction of 62%, and a binder with a volume fraction of 38% (the mass ratio of the binder is polyoxymethylene:polyethylene:paraffin:stearic acid=75:10:10: 5) Blend in the mixer at 190°C for 2 hours; then pass through the granulator to form granular feed;

[0041] S2. Injection molding: inject the feed material obtained by mixing into the mold of special-shaped complex parts and conformal support parts through the injection machine, the injection temperature is 190 °C, the injection pressure is 160 MPa, and the injection mold temperature is 120 °C to obtain the green body of special-shaped complex parts and Conformal support parts green body;

[0042]S3. Degreasing and sintering: Spray a layer of 2μm Al2O3 powder on the contact surface of the conformal support part green body and the special-shaped complex part green b...

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Abstract

The invention relates to the technical field of powder injection molding and particularly discloses a method for preparing a special-shaped complex part through a powder injection molding technology. The method includes the steps of mixing and pelleting, injection molding, and degreasing and sintering. In the injection molding step, a green body of the special-shaped complex part and a green body of a profile-followed supporting part corresponding to the special-shaped complex part are prepared; in the degreasing and sintering step, the special-shaped complex part is placed on the profile-followed supporting part corresponding to the special-shaped complex part for degreasing and sintering. According to the method, the problems of deformation, collapse and even breakage in the degreasing and sintering process of the special-shaped complex part can be well solved, the problem that the special-shaped complex part cannot be sintered through a traditional method is effectively solved, and the complexity of the powder injection molding field is lowered.

Description

technical field [0001] The invention relates to the technical field of powder injection molding, in particular to a method for preparing special-shaped complex parts by using the powder injection molding technology. Background technique [0002] Powder injection molding technology combines the advantages of powder metallurgy and plastic injection molding technology, breaks through the limitations of traditional metal powder molding technology on product shape, and uses plastic injection molding technology to form complex shapes in large quantities and with high efficiency The characteristics of the parts have become a near-net-shaping technology for modern manufacturing of high-quality precision parts. It has the incomparable advantages of conventional powder metallurgy, machining and precision casting. It can shape and produce shapes at one time just like plastic products. Complex metal and ceramic parts are widely used in defense, communication, machinery, automobile, medi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B28B1/24
Inventor 余鹏顾道敏吕永虎屈小勇薄震
Owner SHENZHEN ELEMENT TECH CO LTD
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