How to control the quality of precision casting in the wax mold workshop

Quality control is an important task in the wax mold workshop. Many defects in castings are caused by the pre-process wax pattern. Once the problem occurs, the product has been circulated to the subsequent departments and cannot or is difficult to handle. Therefore, the quality of the wax mold workshop is controlled. To do a good job of the quality of castings, this article is based on the experience of medium temperature molding materials combined with our experience, the following points:
First, in order to stabilize the wax performance of the wax-making workshop, our company changed the shortcomings of the original high-temperature dehydration process to the static water discharge and the hydraulic machine dehydration process. The impurities of the wax material, the ash is greatly reduced, and the quality is guaranteed.
2. Confirm whether the equipment is in normal use, timely maintenance and annual inspection.
A: Make sure the temperature meter and pressure gauge of the waxing machine are normal.
B: The hydraulic and air compressors are operating normally.
C: The temperature of the ice water machine requires the specified range, and the wax tube and wax tank are kept warm.
In short, to ensure that the parameters of a waxing machine are standard, when there is a problem with other equipment, this machine can be used to correct
Third, the quality control of wax parts
3.1 The appearance of the wax, to ensure that the following appearance defects do not occur
A) wax flow pattern, rough surface
B) Wax cracks
C) Bubbles, white wax
D) Large flash, especially where the parting line is (mold wear)
E) The ceramic core breaks in the wax mold or the water-soluble core has residual
F) Depression (mold, wax temperature is too high, pressure is insufficient, the position of the wax inlet is not right or too small, there is no chilling block or cold wax)
G) Deformation (usually caused by short waxing time or incorrect mode)
H) not full
I) Mold failure