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Metal powder injection molding feed and preparation method thereof

An injection molding and metal powder technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of unprocessed products, low production efficiency, and high processing costs, and achieve fast degreasing speed, high molding stability, and product size. stable effect

Inactive Publication Date: 2018-06-26
DONGGUAN HUAJING POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional manufacturing method of 2200 iron-based alloy parts has low production efficiency, difficult processing and high processing cost, and products with complex structures cannot be processed. It has completely failed to meet the rapid development needs of the manufacturing industry in modern society.

Method used

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] In another embodiment, a method for preparing the metal powder injection molding feedstock includes the following steps:

[0048] The 2200 iron-based alloy powder and the molding agent are heated and mixed uniformly, and then extruded and pelletized to obtain an injection molding feed.

[0049] In a preferred embodiment, the method includes the following steps:

[0050] S1. Start the kneader to rotate slowly at 4-6r / min, open the mixing chamber temperature of the equipment, and preheat the 2200 iron-based alloy powder to 180-190°C;

[0051] S2. After detecting the powder temperature ≥170℃, add the forming agent, increase the speed to 30-40r / min, reduce the mixing temperature to 175-185℃, until the material is melted, keep the temperature constant for 20-30min, then cool and extrude Cutting granulation feeding.

[0052] In another embodiment, a method of using the metal powder injection molding feed to make a product includes using the metal powder injection molding feed as a fee...

example 1

[0055] 1. Feeding production:

[0056] Pour 5 kg of 2200 iron-based alloy powder into the mixing chamber of the kneader in advance to preheat it to 180-190℃, start the kneader and rotate at a slow speed of 4-6r / min, wait until the temperature of the 2200 iron-based alloy powder is ≥170℃, then add it to the molding Agent: 40 grams of fully refined paraffin wax, 15 grams of light and heat stabilizer, 30 grams of high-density polyethylene, 20 grams of polyethylene glycol, 30 grams of stearic acid, 365 grams of polyformaldehyde, reduce the temperature of the mixing chamber of the equipment to 175- At 185°C, until the material melts, the temperature is kept at a constant temperature for 20-30 minutes, and then the temperature is lowered, extruded, and pelletized to feed.

[0057] 2. Material molding:

[0058] Choose a standard spline mold, the size of the spline is 100mm*10mm*5mm, install it on the injection molding machine, heat it to a suitable temperature, the mold temperature is 80℃~...

example 2

[0063] 1. Feeding production:

[0064] Pour 4.6 kilograms of 2200 iron-based alloy powder into the mixing chamber of the kneader in advance to preheat to 180-190℃, start the kneader to rotate slowly at 4-6r / min, and wait until the temperature of the 2200 iron-based alloy powder is ≥170℃, then add it to forming Agent: 32 grams of fully refined paraffin wax, 12 grams of light and heat stabilizer, 24 grams of high-density polyethylene, 16 grams of polyethylene glycol, 24 grams of stearic acid, 292 grams of polyformaldehyde, reduce the temperature of the mixing chamber of the equipment to 175- At 185°C, until the material melts, the temperature is kept at a constant temperature for 20-30 minutes, and then the temperature is lowered, extruded, and pelletized to feed.

[0065] 2. Material molding:

[0066] Choose a standard spline mold, the size of the spline is 100mm*10mm*5mm, install it on the injection molding machine, heat it to a suitable temperature, the mold temperature is 80℃~120℃...

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Abstract

The invention discloses a metal powder injection molding feed and a preparation method thereof. The injection molding feed comprises 2200 iron-based alloy powder and forming agents comprising, by weight, 7-9 parts of paraffin, 2-4 parts of photothermal stabilizers, 5-7 parts of polyethylene, 3-5 parts of polyethylene glycol, 5-7 parts of stearic acid and 72-74 parts of polyformaldehyde, and the injection molding feed is prepared from the 2200 iron-based alloy powder and the forming agents according to the ratio of 90:10-92:8. The metal powder injection molding feed is applied to the injectionmolding technology of alloy products, and has the advantages of high fluidity, degreasing rate, density, molding stability, and dimensional stability of products, etc.

Description

Technical field [0001] The invention relates to a metal powder injection molding feed and a preparation method thereof. Background technique [0002] With the continuous progress of social science and technology and the vigorous development of global industrialization, the powder metallurgy injection molding process has developed rapidly due to its many advantages, and its technology has been widely used in military, transportation, machinery, electronics, aerospace, aviation and other fields. [0003] MIM feeding is the core first-stage process for the preparation of metal injection molding products. It mixes metal powder and molding agent in a certain ratio under certain temperature conditions in a mixing and granulating integrated machine for a period of temperature, and then passes through the screw Extrusion, cutting, granulation, and injection molding feed. [0004] 2200 iron-based alloy materials are widely used in military weapons and other industries because of the high har...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/22C22C38/02C22C38/08C22C38/12
CPCC22C38/02C22C38/08C22C38/12B22F3/225B22F1/103B22F1/10
Inventor 庞前列张伟明谢庆丰张柯
Owner DONGGUAN HUAJING POWDER METALLURGY
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