Forming agent, feeding material, preparation method of feeding material, green body and the preparation method of green body

A forming agent and feeding technology, which is applied in the fields of feeding and its preparation method, green body and its preparation, and forming agent, can solve the problems of environmental pollution, complex solvent or acid degreasing process, etc., and achieve pollution reduction and simple use process , Degreasing process simple effect

Active Publication Date: 2018-10-09
DONGGUAN HUAJING POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a molding agent, a feed material and its preparation method, a green body and its preparation method in view

Method used

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  • Forming agent, feeding material, preparation method of feeding material, green body and the preparation method of green body
  • Forming agent, feeding material, preparation method of feeding material, green body and the preparation method of green body
  • Forming agent, feeding material, preparation method of feeding material, green body and the preparation method of green body

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] See figure 1 , The preparation method of feed in one embodiment includes the following steps:

[0044] S110, heat treating the substrate until the temperature of the substrate is 180°C to 200°C.

[0045] In one of the embodiments, the substrate is selected from at least one of metal powder and ceramic powder. Further, the metal powder may be at least one of titanium alloy powder, steel alloy powder, iron alloy and molybdenum metal.

[0046] In one of the embodiments, the substrate is titanium alloy powder, and the heat treatment is performed under protective gas atmosphere or vacuum conditions.

[0047] In one of the embodiments, the particle size of the substrate is 40nm-50nm.

[0048] S120, mixing the base material and the forming agent uniformly to obtain a mixture.

[0049] The forming agent is added to the heated titanium alloy and mixed to a mud mass to obtain a mixture. Keep the temperature at 160℃~190℃ during mixing. The mixing speed is 10r / min~30r / min, and the mixing t...

Example Embodiment

[0064] Example 1

[0065] Weigh 1.5Kg of polyoxymethylene, 2Kg of polypropylene, 0.5Kg of liquid paraffin, 1.5Kg of naphthalene, 1.5Kg of PE wax, 2Kg of microcrystalline wax, 1.5Kg of carnauba wax and 0.5Kg of stearic acid and mix it evenly. Forming agent. Weigh 95Kg of 316L metal powder into the internal mixer, and vacuumize the internal mixer. The 316L metal powder is heated to a temperature of 180°C. Then weigh 5Kg of the above-mentioned forming agent, add the forming agent into the internal mixer, and keep the temperature at 180°C for mixing until a uniform mud-like mixture is formed. The speed of the internal mixer is set to 10r / min, and the mixing time in the internal mixer is 60min to obtain the feed.

[0066] The product mold is selected and installed in the injection molding equipment, and the feed is injected into the injection molding equipment to obtain an intermediate for injection molding. Thermal degreasing of intermediates. The intermediate is placed in a vacuu...

Example Embodiment

[0067] Example 2

[0068] Weigh 3Kg of polyoxymethylene, 1Kg of polyethylene, 1Kg of liquid paraffin, 0.5Kg of naphthalene, 2Kg of PE wax, 1Kg of microcrystalline wax, 3Kg of carnauba wax and 0.1Kg of oleic acid and mix uniformly to obtain a molding agent. Weigh 85Kg of 17-4PH type metal powder into the internal mixer, and vacuumize the internal mixer. The 17-4PH type metal powder is heated to a temperature of 200°C. Weigh 15Kg of the above-mentioned forming agent, add the forming agent to the internal mixer, and keep the temperature at 200°C for mixing until a uniform mud-like mixture is formed. The rotation speed of the internal mixer is set to 30r / min, and the mixing time in the internal mixer is 120min to obtain the feed.

[0069] The product mold is selected and installed in the injection molding equipment, and the feed is injected into the injection molding equipment to obtain an intermediate for injection molding. Thermal degreasing of intermediates. The intermediate is ...

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Abstract

The invention relates to a forming agent, a feeding material, a preparation method of the feeding material, a green body and the preparation method of the green body. The forming agent is used for injection molding of metal powder or ceramic powder, and comprises the following components of, by mass, 15-30 parts of a first high-molecular polymer, 10-20 parts of second high-molecular polymer, 5-10parts of paraffin, 5-15 parts of naphthalene, 15-20 parts of PE wax, 10-20 parts of microcrystalline wax, 15-30 parts of carnauba wax, and 1-5 parts of a surfactant, wherein the first high-molecular polymer is polyformaldehyde, and the second high-molecular polymer is selected from at least one of polypropylene, polyethylene and polyvinyl acetate. The forming agent can be directly removed in a hotdegreasing manner during injection molding of a powder material; and the hot degreasing can be realized through heat treatment at the temperature of 450-700 DEG C; and solvent removal or acid catalytic removal is not needed, so that the degreasing process is simpler, a solvent and an acid catalyst do not need to be used, so that the pollution to the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of powder injection molding, in particular to a molding agent, a feeding material and a preparation method thereof, a green body and a preparation method thereof. Background technique [0002] Powder injection molding technology is a molding method that injects the mixture of metal or ceramic powder and molding agent into the mold cavity. It perfectly combines the mature modern polymer injection molding and powder metallurgy technology. It has the advantages of producing workpieces with complex shapes, high dimensional accuracy, no need for machining, and easy to realize high-efficiency automated production. It is especially suitable for mass production of small mechanical parts with complex shapes, high precision and high-performance materials. It is an advanced parts processing technology. In particular, in recent years, powder injection molding technology has been widely used in the communication industr...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/10B22F3/22B28B1/24
CPCB22F3/1021B22F3/225B28B1/24B22F1/10
Inventor 王落平谢庆丰彭毅萍
Owner DONGGUAN HUAJING POWDER METALLURGY
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