Die Casting

At Batnon, we have more than 40set die casting machineries and equipments, from small scale, medium scale, to large scale. Plus comprehensive tooing and mold fabrication machineries, we’re able to handle sizing up to 1000x1000x500mm large die casting part.

1. Die Casting Mold

At Batnon, precision mold factory covers an area of 5000 square meters, annual output value of more than 30 million, mold manufacturing total investment of more than 30 million.

2. Die Casting Manufacture

We make 30000pcs die casting parts daily.

3. Advantages of Die Casting

1) Good thermal conductivity, electrical conductivity and cutting performance;

2) Small linear shrinkage, so it has good filling performance;

3) Low density and high strength. The ratio of tensile strength to density is 9 ~ 15. It also maintains good mechanical properties when working at high or low temperature;

4) Good corrosion resistance and oxidation resistance. Aluminum alloys are corrosion resistant, they won’t get corroded in water, acide, gasoline or organic materials.

4. Disadvantages of Die Casting

Though there are advantages for die casting, it also has some disadvantages as follow:

1) Low hardness and poor wear resistance;

2) During solidification, the volume shrinkage is relatively large, about 6.6%;

3) The coefficient of linear expansion is relatively high;

4) For easy adhesive mold, the iron content shall be strictly controlled in the range of 0.8% – 0.9%;

5) The melting point is low and the use of high temperature is limited.

5. Application of Die Casting Aluminum Part

Aluminum alloy die casting parts can replace bronze as low, medium speed, medium temperature and heavy load bearings, and the price is 50% lower than that of bronze bearings.

Profiles can also be produced by continuous casting or centrifugal casting to manufacture bearing shells, bushings, etc.

Die casting is known for making molds, and widely used to make aluminum alloy bearings, mechanical joints, alloy pulleys and casting products which can subject to impact and wear.

Die cast aluminum alloy is widely used in automobile, engineering construction, power, electronics, computer, home appliances, high fidelity speaker casing, ships, aviation, and other fields.

6. Surface Treatment of Die Casting Part

Two surface treatments are applied for die casting part. The first is pre- treatment and the other post-treatment. Pre-treatment is to remove oxidation and oil, this will affect post-treatment adhesion and appearance.

During pre-treatment, the following methods can be used:

Shot blasting, sand blasting, phosphating.

During post-treatment, these methods will be common ways:

Spraying, oxidation, electroplating, electrophoresis

In terms of cost, the pretreatment is shot blasting → sand blasting → phosphating → polishing, spraying → electrophoresis → oxidation → electroplating. After phosphating, only spraying and electrophoresis can be carried out, and oxidation and electroplating can no longer be carried out.

Choose from the aspects of decoration and anti-corrosion. The pretreatment sequence is polishing → phosphating → sand blasting → shot blasting, oxidation → electroplating → spraying → electrophoresis.

The automobile engine shell is generally treated by shot blasting → spraying.