Injection molding method of large metal piece

A technology of injection molding and metal parts, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as incomplete sintering, cracking, bubbling, etc., achieve the effect of saving manufacturing costs, improving utilization rate, and reducing equipment requirements

Active Publication Date: 2017-05-31
PINGXIANG GREENLONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a method for injection molding of large metal parts, which solves the problem of bubbles that are prone to occur due to incomplete sintering caused by incomplete degreasing when manufacturing large metal parts by traditional methods , cracking and other issues, to improve the quality of large metal parts while avoiding production safety hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A method of injection molding a large metal piece, the method comprising the following steps:

[0061] 1) Pretreatment of raw materials: drying and dehumidifying the purchased aluminum alloy powder;

[0062] 2) Coating of raw materials: After step 1), the metal powder, POM, PE, PP and antioxidants are added to a mixer at 180°C for 2.5 hours, and the paste is obtained after completely mixing; The consumption of above-mentioned metal powder and POM, PE, PP and antioxidant is respectively in mass percent:

[0063] POM 3%;

[0064] PE 4%;

[0065] PP 4%;

[0066] Antioxidant 0.1%;

[0067] Metal powder balance;

[0068] 3) Feed granulation: extrude the paste obtained in step 2) through an extruder to obtain granule raw materials;

[0069] 4) Design molds: design molds for making metal parts with connecting holes and molds for making connecting parts that match the connecting holes

[0070] 5) Injection of metal parts: Inject the granular raw materials obtained in ste...

Embodiment 2

[0077] A method of injection molding a large metal piece, the method comprising the following steps:

[0078] 1) Pretreatment of raw materials: drying and dehumidifying the purchased ferroalloy powder;

[0079] 2) Coating of raw materials: after step 1), the metal powder, POM, PE, PP and antioxidants are added to a mixer at 180°C for 2 hours, and the paste is obtained after completely mixing; The consumption of above-mentioned metal powder and POM, PE, PP and antioxidant is respectively in mass percent:

[0080] POM 6%;

[0081] PE 6%;

[0082] PP 4%;

[0083] Antioxidant 0.6%;

[0084] Metal powder balance;

[0085] 3) Feed granulation: extrude the paste obtained in step 2) through an extruder to obtain granule raw materials;

[0086] 4) Design molds: design molds for making metal parts with connecting holes and molds for making connecting parts that match the connecting holes

[0087] 5) Injection of metal parts: Inject the granular raw materials obtained in step 3) i...

Embodiment 3

[0094] A method of injection molding a large metal piece, the method comprising the following steps:

[0095] 1) Pre-treatment of raw materials: drying the purchased stainless steel powder to dehumidify;

[0096] 2) Coating of raw materials: After step 1), the metal powder, POM, PE, PP and antioxidants are added to a mixer at 200°C for 1.5 hours, and the paste is obtained after completely mixing; The consumption of above-mentioned metal powder and POM, PE, PP and antioxidant is respectively in mass percent:

[0097] POM 8%;

[0098] PE 4%;

[0099] PP 2%;

[0100] Antioxidant 0.8%;

[0101] Metal powder balance;

[0102] 3) Feed granulation: extrude the paste obtained in step 2) through an extruder to obtain granule raw materials;

[0103] 4) Design molds: design molds for making metal parts with connecting holes and molds for making connecting parts that match the connecting holes

[0104] 5) Injection of metal parts: Inject the granular raw materials obtained in step ...

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Abstract

The invention discloses an injection (MIM) molding method of a large metal piece. The method comprises such steps as sintering raw material pretreatment, raw material coating, feeding granulation, mold design, injection molding, degreasing, splicing and sintering. The method solves such problems as cracking and bubbling caused by incomplete degreasing in manufacturing of the large metal piece by a traditional MIM method, and prevents potential safety hazards in production when improving the quality of the large metal piece.

Description

technical field [0001] The invention belongs to the technical field of injection molding processing, and in particular relates to an injection molding method for large metal parts. Background technique [0002] Metal Injection Molding (MIM) is a molding method in which a plasticized mixture of metal powder and its binder is injected into a model, and it is a method of producing a new type of metal industrial product; specifically, the selected powder and binder Mixing is carried out and the mixture is then pelletized and then injection molded into the desired shape. At present, in the traditional MIM process, when the metal parts are large, it is easy to cause problems such as bubbling and cracking during the sintering process due to incomplete degreasing, and the quality of the product cannot be guaranteed. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a method for injection m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/22
CPCB22F3/225B22F1/103B22F1/10
Inventor 陈冬检
Owner PINGXIANG GREENLONG IND
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