Defects and solutions of silica sol lost wax casting process
Author: Date: 2021-3-4 9:45:44
Defect 1: Casting shrinkage cavity
The main reasons are casting shrinkage caused by alloy solidification and shrinkage,and a large amount of oxygen and nitrogen in the air are absorbed when the alloy is dissolved,and gas is released when the alloy is solidified to cause casting shrinkage.
The solution:
1) Place the gold ball.
2) Thicken the diameter of the sprue or reduce the length of the sprue.
3) Increase the amount of metal.
4) Use the following methods to prevent the structure from sinking in the direction of the sprue.
A. Place a cooling channel at the root of the sprue.
B. In order to prevent the molten metal from hitting the cavity vertically,the sprue should be curved.
C. Place the sprue diagonally.