During the pouring process, the location of the metal casting of the casting will endanger the quality of the precision casting, the precision of the specifications, the model design and the difficulty coefficient of the processing technology.

How to choose pouring parts:

1. inPrecision castingThe key production processing surface or the key production surface is facing down or on the side: when pouring, the steam is taken from the metal material, and the sand in the slag and metal mold casting will increase, and there will be pores and welding on the upper part of the casting. In the case of defects such as bumps and sand holes, it is more likely that defects will appear at the bottom edge of the casting, and there may be a higher density.

2.Precision castingThe large-scale plan view is tilted or tilted pouring: because during pouring, the hot metal material liquid has obvious radiant heat to the upper end of the metal mold casting, which causes the phenomenon of internal expansion of the sand mold on the top of the wall, which leads to the occurrence of sand and sand on the top of the wall. Defects such as holes. Adopting inclined pouring or adopting large-scale layout can avoid welding defects in large-scale layout.

3. The thick wall of the precision casting is downward, inclined or inclined: In order to avoid cold barriers in the thick wall position of the casting, and no defects in pouring, the thick wall with a larger area should be placed at the bottom of the casting, or it should be placed on the outer wall or bent Place.

4. The vast majority of the thickness of precision castings should be placed on the upper end or side of the clinical diagnosis surface to facilitate feeding.