Strategies to improve the service life of aluminum die casting mold

Aluminum die casting mold faces harsh working conditions such as high temperature, high pressure, and high-speed aluminum liquid scouring during the die casting production process. Improving its service life is crucial to reducing costs and improving production efficiency.

1. Optimal selection of mold materials

High-quality mold materials are the basis for extending the service life. Mold steel with high thermal fatigue resistance, high hardness and good toughness should be selected. For example, H13 steel has good comprehensive properties and can withstand high temperatures and stress changes during aluminum die casting. In addition, for some die-casting molds with special requirements, powder metallurgy mold steel can also be used. This material has uniform and dense structure and better thermal fatigue resistance.

2. Reasonable mold design

Gate and runner system

A reasonably designed gate and runner system can make the aluminum liquid flow evenly and smoothly in the mold cavity. Avoid high-speed aluminum liquid directly impacting the mold cavity wall to reduce scouring wear. The size and shape of the gate should be precisely designed according to the structure and weight of the casting to ensure that the filling speed of the aluminum liquid is moderate.

Cooling system

An efficient cooling system helps control the temperature of the mold. By rationally arranging the cooling channels, the various parts of the mold can be cooled quickly and evenly. This can not only improve production efficiency, but also reduce problems such as mold cracking caused by thermal stress.

3. Improvement of mold manufacturing process

Processing accuracy

Improve the processing accuracy of aluminum die casting mold to ensure that the dimensional accuracy and surface roughness of key parts such as cavity and core meet the requirements. Precision processing can reduce local stress concentration and improve the overall strength of the mold.

Heat treatment process

The correct heat treatment process can improve the hardness and toughness of the mold. During the heat treatment process, strictly control parameters such as heating speed, quenching temperature, and tempering times to eliminate residual stress inside the mold material.

4. Use and maintenance of molds

Reasonable die casting process parameters

In die casting production, reasonable die casting temperature, pressure, speed and other process parameters should be set according to the characteristics of the mold and casting. Avoid excessive wear or damage to the mold due to improper process parameters.

Regular maintenance

Clean, inspect and repair the aluminum die casting mold regularly. Remove aluminum chips, oxides and other impurities from the mold surface in time, check the wear of the mold, and repair or replace the worn parts.