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Adhesive and method for preparing metal powder injection molding feedstock from same

A technology of metal powder and binder, which is applied in the field of metal powder injection molding, can solve the problems of uneven density of the injection billet and low debonding efficiency, and achieve the effects of simple preparation process, high debonding efficiency and environmental protection

Active Publication Date: 2011-07-06
CHANGZHOU GIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: In order to overcome defects such as uneven density of the injection billet and low debonding efficiency during MIM feed molding, a binder and the feed material for metal powder injection molding made therefrom are provided. Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The configuration of each component in the binder: 2.3% thermoplastic elastomer olefin, 45% Brazilian wax, 24.5% industrial paraffin, 25.1% high-density polyethylene, 3% polypropylene and 0.1% stearic acid.

[0023] A method for preparing a feedstock for metal powder injection molding made of a binder:

[0024] (1) Ingredients: Accurately weigh the components in the binder according to the proportions of the various materials in the above binder. The binder accounts for 6% of the mass of the feed, that is, the metal The powder accounts for 94% of the mass of the feed, and the corresponding metal powder is accurately weighed according to this;

[0025] (2) Mixing: Put the metal powder into the kneader and mix and preheat. When the temperature reaches above 150°C, put in the binder in batches at intervals of half an hour and knead fully. After kneading into a fluid state and the kneading temperature reaches 170°C , start timing and kneading for 2 hours, and measure the t...

Embodiment 2

[0029] The configuration of each component in the binder: 3.5% thermoplastic elastomer olefin, 38.8% Brazilian wax, 20.4% industrial paraffin, 32% high-density polyethylene, 5% polypropylene and 0.3% stearic acid.

[0030] A method for preparing a feedstock for metal powder injection molding made of a binder:

[0031] (1) Ingredients: Accurately weigh the components in the binder according to the proportions of the various materials in the above binder. The binder accounts for 7% of the mass of the feed, that is, the metal The powder accounts for 93% of the mass of the feed, and the corresponding metal powder is accurately weighed according to this;

[0032] (2) Mixing: Put the metal powder into the kneader and mix and preheat. When the temperature reaches above 150°C, put in the binder in batches at intervals of half an hour and knead fully. After kneading into a fluid state and the kneading temperature reaches 170°C , start timing and kneading for 2 hours, and measure the t...

Embodiment 3

[0036] The configuration of each component in the binder: 5% thermoplastic elastomer olefin, 35.1% Brazilian wax, 23% industrial paraffin, 26.5% high-density polyethylene, 10% polypropylene and 0.4% stearic acid.

[0037] A method for preparing a feedstock for metal powder injection molding made of a binder:

[0038] (1) Ingredients: Accurately weigh the components in the binder according to the proportions of the various materials in the above binder. The binder accounts for 8% of the mass of the feed, that is, the metal The powder accounts for 92% of the mass of the feed, and the corresponding metal powder is accurately weighed according to this;

[0039] (2) Mixing: Put the metal powder into the kneader and mix and preheat. When the temperature reaches above 150°C, put in the binder in batches at intervals of half an hour and knead fully. After kneading into a fluid state and the kneading temperature reaches 170°C , start timing and kneading for 3 hours, and measure the te...

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PUM

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Abstract

The invention relates to the field of metal powder injection molding, in particular to an adhesive and a method for preparing metal powder injection molding feedstock from the same. The adhesive comprises olefinic thermoplastic elastomers, carnauba wax, commercial paraffin, high-density polyethylene, polypropylene and stearic acid; and the raw materials are mixed in a ratio, extruded, cooled, crushed, and packaged in vacuum to form the qualified feedstock. The metal powder injection molding feedstock prepared from the adhesive is low in manufacturing cost; in the molding process, a liquid phase and a solid phase are hardly separated, and an injection blank is uniform in density; the debonding efficiency is high; and a sintered blank is high in density. The invention overcomes the defect that the traditional metal powder injection molding feedstock is high in cost, widens the application range, and creates greater economic and social benefits.

Description

technical field [0001] The invention relates to the field of metal powder injection molding, especially a kind of binder and its made [0002] Process for the preparation of feedstock for metal powder injection molding. Background technique [0003] Metal powder injection molding (MIM) is a new molding technology that has developed rapidly in the world in recent years. Its advantage is that it can manufacture small parts of any complex shape, and the density of each part of the product is uniform and the performance is excellent. An important aspect of this technology lies in the selection and preparation of feed materials, and the key to the preparation of feed materials is the preparation of binders, so the proper preparation of binders and feed materials is fundamental to ensure the realization of this process technology. The ideal feeding material should be easy to form, easy to debond, high solid loading (volume fraction of metal powder occupied by the material), liqui...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08L23/06C08L23/00C08L23/12C08K5/09B22F1/00
Inventor 王明喜
Owner CHANGZHOU GIAN TECH
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