Forming agent, feed material and preparation method thereof, green body and preparation method thereof

A molding agent and feeding technology, which is applied in the fields of feeding and its preparation method, green body and its preparation, and molding agent. It can solve the problems of complex solvent or acid degreasing treatment process and environmental pollution, so as to achieve simple use process and reduce pollution. , The effect of simple process

Active Publication Date: 2020-07-24
DONGGUAN HUAJING POWDER METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 of the problems of using solvent or acid degreasing in the traditional powder injection molding technology, which are complicated and pollute the environment

Method used

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  • Forming agent, feed material and preparation method thereof, green body and preparation method thereof
  • Forming agent, feed material and preparation method thereof, green body and preparation method thereof
  • Forming agent, feed material and preparation method thereof, green body and preparation method thereof

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preparation example Construction

[0043] see figure 1 , the preparation method of the feed of an embodiment, comprises the following steps:

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

[0045] In one embodiment, 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 embodiment, the base material is titanium alloy powder, and the heat treatment is carried out in a protective gas atmosphere or under vacuum conditions.

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

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

[0049] The molding agent is added into the heated titanium alloy and mixed until it becomes a muddy dough to obtain a mixture. During mixing, the temperature is maintained at 160°C to 190°C. The mixin...

Embodiment 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 evenly to obtain Forming agent. Take 95Kg of 316L type metal powder and add in the internal mixer, and the internal mixer is vacuumized. The 316L type metal powder is heat treated to a temperature of 180°C. Then weigh 5Kg of the above-mentioned molding agent, add the molding agent into the internal mixer, and keep the temperature at 180°C for mixing until a uniform muddy mixture is formed. The rotating speed of internal mixer is set as 10r / min, and the time of mixing in internal mixer is 60min to obtain feeding.

[0066] The selected product mold is installed in the injection molding equipment, and the feed material is injected into the injection molding equipment for injection molding to obtain an intermediate. The intermediate is thermally degreased. The intermed...

Embodiment 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 them uniformly to obtain a molding agent. Weigh 85Kg of 17-4PH type metal powder and add it into the internal mixer, and vacuumize the internal mixer. The 17-4PH type metal powder is heat treated to a temperature of 200°C. Then weigh 15Kg of the above-mentioned molding agent, add the molding agent into the internal mixer, and keep the temperature at 200°C for mixing until a uniform mud-like mixture is formed. The rotating speed of internal mixer is set as 30r / min, and the time of mixing in internal mixer is 120min to obtain feeding.

[0069] The selected product mold is installed in the injection molding equipment, and the feed material is injected into the injection molding equipment for injection molding to obtain an intermediate. The intermediate is thermally degreased. The...

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Abstract

The invention relates to a forming agent, a feeding material and a preparation method thereof, a green body and a preparation method thereof. A molding agent for injection molding of metal powder or ceramic powder, comprising: 15 to 30 parts of the first high molecular polymer; 10 to 20 parts of the second high molecular polymer; 5 parts of paraffin wax 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 surfactant; among them, The first high molecular polymer is polyoxymethylene; the second high molecular polymer is selected from at least one of polypropylene, polyethylene and polyvinyl acetate. In the injection molding of powder materials, the above molding agent can be directly removed by thermal degreasing; it can be removed after heat treatment at 450 ° C ~ 700 ° C; no solvent removal or acid catalyzed removal, degreasing process It is simpler and does not require the use of solvents and acid catalysts, reducing environmental pollution.

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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Patent Type & Authority Patents(China)
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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