Why do the copper castings have mesh sometimes?

Copper castings encounter various problems in the production process, including the case of mesh fins, which are characterized by the presence of reticular or dents on the surface of the copper casting. As the number of die castings increases and expands and expands, what is the reason?

1. The surface of the cavity of the die-casting mold is cracked;

2. The material of the die-casting mold is improper or the heat treatment process is incorrect;

3. The temperature difference between the hot and cold of the die-casting mold is too large;

4, the pouring temperature is too high;

5. The preheating of the die casting mold is insufficient;

6, the surface of the cavity is rough;

7. The die-casting mold wall is thin or has sharp corners.

The above are several common reasons for the occurrence of mesh fins in copper castings. Of course, there may be other situations, but these are more common. We need to avoid the above-mentioned situations in the production process to ensure that The quality of the product can be satisfied by the customer.

Copper and other casting by foundry

Why do the copper castings have mesh sometimes?