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Water-soluble binder, preparation method of binder and method for preparing parts

A water-soluble binder and parts technology, which is applied in the field of metal powder injection molding, can solve the problem that the metal powder injection molding process cannot be well applied, and achieves advantages of popularization and large-scale production, cost-free pollution, and good extrusion. performance effect

Pending Publication Date: 2021-12-24
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents introduce ingredients that are not suitable for metal injection molding, such as SiC, which will adversely affect the performance of the sintered parts, so the above-mentioned binders are not well suitable for metal powder injection molding processes

Method used

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  • Water-soluble binder, preparation method of binder and method for preparing parts
  • Water-soluble binder, preparation method of binder and method for preparing parts
  • Water-soluble binder, preparation method of binder and method for preparing parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 Shown is the first preferred embodiment of the present invention. The metal powder in this embodiment is 316 stainless steel powder, the antioxidant is BHT (2,6-di-tert-butyl-4-methylphenol), and the framework material is HDPE (high-density polyethylene).

[0034] In terms of mass percentage, the water-soluble binder in this embodiment includes 30% PEG1000, 40% PEG2000, 15% POM, 5% SA, 1% BHT and 9% HDPE. The method for preparing the water-soluble binder in this embodiment is to first melt 15% POM, then add 30% PEG1000, 40% PEG2000, 5% SA, 1% BHT, 9% HDPE to the melted POM and wait for all After the raw materials are melted and mixed evenly, the water-soluble binder is prepared.

[0035] The method for preparing parts using the water-soluble binder of this embodiment includes the following steps in turn: S1 Mixing and feeding: According to the mass percentage, binder: 316 stainless steel powder=7:100 ratio is mixed evenly in the molten state ; S2 Mol...

Embodiment 2

[0037] Such as figure 2 Shown is the second preferred embodiment of the present invention. The metal powder in this embodiment is 316 stainless steel powder, the antioxidant is BHA (butyl hydroxyanisole), and the skeleton material is LDPE (low-density polyethylene, also known as high-pressure polyethylene).

[0038]The difference between this embodiment and the above-mentioned embodiment 1 is: 1) there are differences in the mass percentages of the components in the water-soluble binder, specifically, in terms of mass percentage, the binder of this embodiment includes 35% PEG1000, 35% % PEG2000, 15% POM, 6% SA, 2% BHA and 7% LDPE.

[0039] 2) There is a difference in the ratio of binder and stainless steel powder in the mixed feed. Specifically, the binder and stainless steel powder are mixed evenly at a ratio of 12:100. The bending strength of the tested part is 6.0MPa, and the strength of the green body of the part is higher than that of wax Base feed part strength increa...

Embodiment 3

[0043] Such as image 3 Shown is the 3rd preferred embodiment of the present invention.

[0044] The antioxidant is TBHQ (tert-butylhydroquinone), and the skeleton material is PP (polypropylene).

[0045] The difference between this embodiment and the above-mentioned embodiment 1 is: 1) there are differences in the mass percentages of the components in the water-soluble binder, specifically, in terms of mass percentage, the binder in this embodiment includes 35% PEG1000, 39% PEG2000, 15% POM, 5% SA, 1% TBHQ and 5% PP;

[0046] 2) There is a difference in the ratio of binder and stainless steel powder in the mixed feed. Specifically, the binder and stainless steel powder are mixed evenly at a ratio of 10:100. The bending strength of the tested part is 5.8MPa, and the strength of the green body of the part is higher than that of wax Base feed part strength increased by about 5%;

[0047] 3) There is a difference in the rotational speed of the agitator in the degreasing treatm...

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Abstract

The invention relates to a water-soluble binder, a preparation method of the binder and a method for preparing parts. The water-soluble binder is characterized by comprising the following components in percentage by mass: 30-37 % of PEG 1000-1500, 35-40 % of PEG 2000-3000, 10-15 % of POM, 5-6 % of SA, 1-2 % of an antioxidant, and 5-9 % of a framework material. According to the technical scheme, certain strength of a green body can be ensured while high degreasing rate is provided, good shape retention is achieved, meanwhile, no influence is caused to the parts, and no pollution exists.

Description

technical field [0001] The invention belongs to the field of metal powder injection molding, and specifically relates to a water-soluble binder, a preparation method of the water-soluble binder and a method for preparing parts using the water-soluble binder. Background technique [0002] Injection molding technology is an environmentally friendly mass production technology with energy saving, material saving, excellent performance, high product precision and good stability. It has been widely used in stainless steel, tungsten-based powder and other materials. [0003] The binders currently used in injection molding are mainly divided into two categories: plastic-based and wax-based. The main matrix of plastic-based binders is POM materials. Special equipment is required for degreasing, and oxalic acid or nitric acid is used as a catalyst for catalytic degreasing. Degreasing The exhaust gas produced needs to be processed by high-temperature combustion. However, the main matr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F1/00B22F3/10
CPCB22F3/225B22F3/1021B22F3/1007
Inventor 张辰秦晓冬包崇玺朱志荣
Owner NBTM NEW MATERIALS GRP
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