Copper alloy injection forming technology

An injection molding, copper alloy technology, applied in the field of copper alloy injection molding process, can solve the problems of difficult to meet high strength and high thermal conductivity, unstable product performance, high production cost, achieve excellent antimagnetic performance, shorten production cycle, Simple process effect

Inactive Publication Date: 2017-08-18
CHANGZHOU GIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] High strength and high thermal conductivity in copper alloy are a pair of contradictory characteristics. At present, it is mainly solved by alloying method and composite material method: the composite material method has complicated process, unstable product performance, high production cost, and is in the initial stage of research. stage; while the alloying method has the advantages of relatively mature technology, relatively simple process, low cost, and suitable for large-scale production, but the above two methods have the defects that it is difficult to meet high strength and high thermal conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A copper alloy injection molding process, comprising the following preparation steps:

[0043] a. Mixing material: uniformly mix copper alloy powder and binder together to make feed for injection, wherein the mass percentage of chemical components in copper alloy powder is: copper 98.8%, chromium 1.2%.

[0044] b. Injection molding: the feed is injected into the injection machine, and the feed is injected into the barrel of the injection machine at an appropriate pressure and heated to form a rheological plastic material. The injection pressure of the feed into the barrel is 120Mpa, and the injection speed is 50g / s, the temperature range of each temperature interval in the barrel is:

[0045] The first section of the barrel: 160°C, the second section of the barrel: 150°C, the third section of the barrel: 140°C, the fourth section of the barrel: 130°C, the fifth section of the barrel: 120°C;

[0046] Then inject it into the mold cavity from the nozzle of the injection ...

Embodiment 2

[0071] A copper alloy injection molding process, comprising the following preparation steps:

[0072] a. Mixing: Evenly mix copper alloy powder and binder together to make feed for injection.

[0073] The mass percentages of the chemical components in the copper alloy powder are: 99.0% copper and 1.0% chromium.

[0074] b. Injection molding: The feed is injected into the injection machine, and the feed is injected into the barrel of the injection machine at an appropriate pressure and heated to form a rheological plastic material. The injection pressure of the feed into the barrel is 115Mpa, and the injection speed is 60g. / s, the temperature range of each temperature range in the barrel is: the first barrel section: 170°C, the second barrel section: 160°C, the third barrel section: 150°C, the fourth barrel section: 140°C, the fifth barrel section: 130°C;

[0075] Then inject it into the mold cavity from the nozzle of the injection machine through a certain injection pressur...

Embodiment 3

[0100] A copper alloy injection molding process, comprising the following preparation steps:

[0101] a. Mixing: Evenly mix copper alloy powder and binder together to make feed for injection.

[0102] The mass percentages of the chemical components in the copper alloy powder are: 99.2% copper and 0.8% chromium.

[0103] b. Injection molding: The feed is injected into the injection machine, and the feed is injected into the barrel of the injection machine at an appropriate pressure and heated to form a rheological plastic material. The injection pressure of the feed into the barrel is 135Mpa, and the injection speed is 55g. / s, the temperature range of each temperature interval in the barrel is:

[0104] One stage of barrel: 180°C, second stage of barrel: 170°C, third stage of barrel: 160°C, fourth stage of barrel: 150°C, fifth stage of barrel: 140°C;

[0105] Then inject it into the mold cavity from the nozzle of the injection machine through a certain injection pressure. Th...

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Abstract

The invention discloses a copper alloy injection molding process, which sequentially forms copper alloy products with complex structures through feeding, injection molding, degreasing extraction, sintering and post-treatment processes. Through the above method, the copper alloy products formed by the copper alloy injection molding process of the present invention meet the requirements of high strength and high thermal conductivity at the same time, and the whole process is simple, the production cycle is shortened, the surface finish is high, the corrosion resistance is good, and it has excellent corrosion resistance. Magnetic properties.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to a copper alloy injection molding process. Background technique [0002] High-strength and high-conductivity copper alloy is a kind of structural functional material with excellent comprehensive physical and mechanical properties. It is widely used in electric power, electronics, machinery and other industrial fields. It can be used as electrical engineering switch contact bridge, mold lining of continuous casting machine, Integrated circuit lead frame, high-power asynchronous traction motor rotor, electrified railway contact wire (tram line), high pulse magnetic field conductor material, etc. [0003] High strength and high thermal conductivity in copper alloy are a pair of contradictory characteristics. At present, it is mainly solved by alloying method and composite material method: the composite material method has complicated process, unstable product performance, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22C22C1/04
CPCB22F3/225C22C1/0425
Inventor 邬均文孙爱平张杨刘春林
Owner CHANGZHOU GIAN TECH
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