The injection molding process is suitable for mass production of higher quality and more complex product parts. The injection molding process depends largely on the design and materials used in production. Therefore, manufacturers looking for simpler tooling processes to produce better products at lower cost turn to aluminum injection molding.

 Traditional aluminum die-casting products can also be produced. However, they still have many shortcomings, the product tolerance is relatively large, and some require secondary and tertiary processing. Because it is difficult for them to guarantee fast production. We will discuss the advantages, disadvantages, and features of aluminum injection molding.


What is injection mold aluminum background?

With the continuous progress of social science and technology and the vigorous development of global industrialization, the powder metallurgy industry develops rapidly because of its many advantages, and its technology has been widely used in the military, transportation, machinery, electronics, aerospace, aviation, and other fields.

MIM (metal injection molding) feeding is the core of the metal injection molding product preparation process, which is the metal powder and molding agent according to a certain proportion at a certain temperature, in the mixing machine for a period of time temperature mixing. Then through the screw extrusion cutting granulation, into injection molding feed.

Although the aluminum material has a low density, its product strength is relatively high, which is close to or exceeds that of high-quality steel. It has strong plasticity, good thermal conductivity, corrosion resistance, and thermal conductivity. Some aluminum alloys can obtain good mechanical properties and physical properties through heat treatment, and can also obtain better corrosion resistance through anodizing.

Because of the traditional aluminum alloy parts manufacturing method, low production efficiency, difficult processing cost, and complex structure of the product processing can not come out, has been completely unable to meet the needs of the rapid development of the modern social manufacturing industry.

Therefore, it is necessary to provide an aluminum mim metal injection molding feed suitable for the metal injection molding process.


What are Metal injection molding aluminum technology implementation elements?

Based on this, it is necessary to provide an aluminum injection molding feed, aluminum injection molding parts, and preparation method, including aluminum alloy injection molding feed, aluminum injection molding feed preparation method, aluminum alloy injection molding parts, and aluminum injection molding parts preparation method. It can also be referred to as aluminum injection molding feed and its preparation method and aluminum injection molding parts and its preparation method.

 An aluminum injection molding feed comprises aluminum powder and molding agent in the percentage of the following mass:

 Aluminum alloy powder 85% ~ 88%;

 Molding agent 12%-15%;

 Wherein, the molding agent comprises the following mass components:

 In one embodiment, the aluminum alloy powder is 2024 aluminum alloy powder.

 In one embodiment, the aluminum alloy 2024 aluminum powder comprises the following components by mass percentage:

 In one embodiment, the paraffin in question is No.58 paraffin.

In one embodiment, the molecular weight of the ethylene-vinyl acetate copolymer ranges from 1900 to 2000.

 In one of the embodiments, the polyformaldehyde is a co-polyformaldehyde.

 In one embodiment, the polyethylene glycol is polyethylene glycol 2000 to 6000.


What is Metal injection molding aluminum feed preparation method, including the following steps

  1. Preheat the aluminum alloy powder for injection molding feeding of any of the above to 170℃ to 190℃;
  2. Add the molding agent of any of the above aluminum alloy injection molding feedstock to the preheated aluminum alloy powder, continue heating, and maintain the temperature at 175℃ to 185℃ to melt the molding agent and mix with the aluminum alloy powder; 
  3. Keep the temperature at 175℃ to 185℃ for 20 to 30 minutes;
  4. Cool down;
  5. Extrude;
  6. Cut granulation feed.

A method for preparing an injection mold aluminum includes the following steps: including a method for preparing an injection molding feed of an aluminum alloy as described above and, after cutting and pelleting the feed, steps: forming, degreasing, and sintering.

The invention relates to an aluminum injection molding part prepared by the method of preparing any of the aluminum alloy injection molding parts mentioned above.

The above-mentioned aluminum injection molding feedstock, aluminum alloy injection molding parts, and preparation methods can be applied to the production of feasible aluminum alloy products with complex structures, which changes the shortcomings of traditional aluminum alloy processing difficulties, long processing cycle and high processing cost, greatly reduces the production and processing cost of complex aluminum alloy parts, and innovates the production mode of the entire aluminum alloy industry. It has raised the level of technological innovation and production in the domestic manufacturing industry. Moreover, through the new process, the new preparation and processing method, the quality of the obtained aluminum alloy injection molding parts is excellent, especially suitable for large-scale production, to reduce the cost and improve the efficiency of the production of aluminum molding parts.


What are the advantages of aluminum metal injection molding molds?

· Cost

When it comes to making injection molds, aluminum injection molds are cheaper than steel injection molds. Assuming all other conditions are equal, molds made of aluminum can recover the mold investment cost relatively quickly.

· Production time

Aluminum molds ensure a faster product production process. From mold design to finished product production, steel injection molding may take 1-2 months. However, with aluminum injection molds, the creation of molds, prototypes and finished products takes only 7-14 days. 

·Effective for low quantities

Aluminum plastic injection molds are more cost-effective for making parts in small batches. This is because of the initial cost he was able to reduce, while only making thousands of reliable parts.

·Grinding time

Steel molds do not dissipate heat as quickly as aluminum prototype molds. As a result, they can heat up and cool down significantly faster. In the injection molding process, the cooling time accounts for the cycle of the entire molding process. Therefore, choosing an aluminum forming method can shorten the cycle time and thus speed up the part manufacturing.


Uneven heating and cooling is one of the leading causes of part defects such as sink marks, voids and burn scars. The superior heat dissipation of aluminum molds allows the mold to be heated and cooled quickly and evenly, reducing the number of defective parts and scrap.

·Simple Repairs and Retrofits

The hardness of steel is very high, so the repair time of deformed or damaged steel molds is long and the repair cost is high, which in turn affects the delivery time of products. However, aluminum plastic injection molds are made of softer materials, and this feature makes repair and replacement simple if there is a problem with the aluminum injection mold.

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