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Preparation method for efficient and environment-friendly metal injection molding feed

An injection molding and metal technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of slow reaction and long time consumption, and achieve the effects of less environmental pollution, avoiding harm and inconvenience, and efficient process selection

Inactive Publication Date: 2021-01-29
苏州炻展新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-efficiency and environmentally-friendly preparation method of metal injection molding feedstock, which has the advantages of safety, environmental protection, and high efficiency, and solves the problems of slow reaction and long time consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Components by weight: 78 parts of PEG, 14 parts of paraffin, 3 parts of proppant, and 5 parts of toughening agent. After drying each material in a constant temperature vacuum drying oven for 5 hours, take it out, put it into a mixer respectively, and heat it to 180 ℃, keep stirring for 3 hours, then pour out and cool, after cooling, break to 2-5mm particles.

[0032] Add 5kg of 17-4PH stainless steel powder to the internal mixer successively, add 0.5kg of crushed lubricant, heat to 185°C under nitrogen protection, banbury for 50min, extrude and granulate to obtain feed, the feed melt The flow rate is 1500g / 10min~2000g / 10min.

[0033] Inject the fresh feed into a green sample on an injection molding machine, and the green density is 4.9g / cm3~5.1g / cm3.

[0034] Put the body into a combustion degreasing furnace at a temperature of 650°C for 20 minutes.

[0035] The degreased sample was vacuum sintered, the heating rate was set at 5°C / min, the temperature was raised to 11...

Embodiment 2

[0038] Components by weight: 70 parts of PEG, 22 parts of paraffin, 4 parts of proppant, and 4 parts of toughening agent. After drying each material in a constant temperature vacuum drying oven for 5 hours, take it out, put it into a mixer respectively, and heat it to 180 ℃, keep stirring for 3 hours, then pour out and cool, after cooling, break to 2-5mm particles.

[0039] Add 5kg of 316L stainless steel powder to the internal mixer successively, add 0.5kg of crushed lubricant, heat to 185°C under nitrogen protection, banbury for 50min, extrude and granulate to obtain the feed, and the melt flow rate of the feed is It is 1600g / 10min~2000g / 10min.

[0040] Inject the fresh feed into a green sample on an injection molding machine, and the green density is 4.9g / cm3~5.1g / cm3.

[0041] Put the body into a combustion degreasing furnace at a temperature of 650°C for 20 minutes.

[0042] The degreased sample was vacuum sintered, the heating rate was set at 5°C / min, the temperature w...

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Abstract

The invention relates to the technical field of metal injection molding, in particular to a preparation method for an efficient environment-friendly metal injection molding feed. The preparation method comprises the following step I of preparing adhesive comprising the following components by weight: 65-85 parts of PEG, 15-25 parts of paraffin, 1-5 parts of propping agents and 2-10 parts of toughening agents; the step II of performing vacuum drying for different processing aids, such as the PEG and the paraffin, and drying in a constant-temperature vacuum drying oven at 60 DEG C for 3-6 hours;and the step III of adding the dried raw materials to a constant-temperature mixing mill, starting stirring at the speed of 10-15 revolutions per minute, starting heating at the same time, and setting the temperature to be 180 DEG C-190 DEG C. The method for preparing the metal injection molding feed is safer, more environmentally friendly and more efficient; on the premise of ensuring that the fluidity and the molding performance of the metal feed are not changed, the degreasing time and the sintering time are shortened, and the energy consumption is reduced; and the environmental pollutionis reduced.

Description

technical field [0001] The invention relates to the technical field of metal injection molding, in particular to a method for preparing high-efficiency and environment-friendly metal injection molding feedstock. Background technique [0002] Metal Injection Molding (MIM for short) is a new type of powder metallurgy near-net forming technology that combines metal powder and injection molding technology. As we all know, plastic injection molding technology can conveniently and efficiently produce products of various complex shapes. With this feature, adding appropriate organic matter to the metal powder can make the metal powder have similar processing characteristics, so that it can produce various metal parts with complex shapes in large quantities and at low cost, and because the process does not need to melt the metal, so Can be applied to all types of metal materials, even refractory metals. [0003] The basic process steps of metal injection molding are: first, select t...

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 赵志刚
Owner 苏州炻展新材料科技有限公司
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