Investment casting support

The structural design of investment casting parts should not only meet the requirements of the machinery and equipment itself and the processing technology, but also meet the requirements of the casting process. Casting structure design should pay attention to the following points:

One, to facilitate the manufacture of core boxes and molding.

1) small blender, investment mold precision casting chuck casting process should be used as far as possible not to shape the inside of the blender castings. In the choice of core, there should be sufficient process holes to facilitate the support, fixed and exhaust sand.

2) for the inside and outside of the casting and strengthen the rib and other structures, the starting mold orientation should be set a certain construction slope.

3) castings in the convex part of the mold and the casting itself should not be too far apart, several convex mold at the same height, the same surface spacing is close, the overall raised part of the good connected into.

4) the shape of the casting should be simple and easy to start the mold, the fractal surface of the casting should be as flat as possible, the number should be as much as possible small;

Second, the tendency to reduce casting defects.

1) castings with large planes within the casting should be avoided as much as possible.

2) application of convex edges to reinforce the casting holes in the inner wall of the casting plane to reduce the thickness.

3) casting structure should shrink as much as possible during the cooling process.

4) large compartmentalized cavities, such as waterways within the casting, air supply, etc., should have a number of connecting columns.