Reasons and solutions for the deformation of the blank of the lost foam casting

The lost foam casting casting process has outstanding advantages such as high casting dimensional accuracy and less pollution. It has developed rapidly in recent years, but forging blank deformation is one of the common defects of lost foam casting. The following lost foam casting factories will give you a comprehensive understanding of lost foam casting and forging Causes and Solutions of Blank Distortion!

White film deformation and solution caused by forming process

When taking the mold after molding, due to some complex geometric shapes, due to the effect of air pressure and pressure, and physical stretching deformation when taking the mold manually.

Solution:

1. When making molds, try to use molds coated with Teflon on the surface;

2. Moderate mold draft angle;

3. Apply proper air pressure;

4. For shell white molds, adhesive tape can be used to fix lost foam casting products;

5. Do corrective solution when bonding combination.

White mold deformation and white mold drying solution

When the white mold is drying, it is unscientific to place it, and if the layer is too high, it will cause deformation. The drying time of the white mold is not suitable, resulting in insufficient or excessive shrinkage of the linear specification of the white mold, and the blank specification after pouring does not meet the requirements of the drawing.

Solution:

1. The drying rack is used when the white mold is dried and placed, which does not waste the space of the drying room and avoids the deformation of the white mold;

2. Drying of the white mold has two functions, one is to dry the moisture inside the white mold, and the other is to make the residual styrofoam in the white mold escape. White mold can cause linear gauge shrinkage during drying. The mold factory leaves the shrinkage capacity of the white mold in the design, but different products, the same drying temperature and drying time, the linear shrinkage of the white mold is different, so the drying process of different products is different. In the manufacturing process of lost foam casting equipment, it is necessary to take care of the two functions of white mold drying and ensure the specifications of the casting blank after shrinkage.