The reason why Power Tools Die Casting Part appears under casting:
 

1. Poor filling conditions, irregular condensed metal in the undercast part.

① When the pressure is insufficient, insufficient, and the metal at the front of the activity solidifies prematurely, under-casting occurs in corners, deep recesses, thin walls (even thinner than the average wall thickness), and cylindrical hole walls.

②The mold temperature is too low.

③The alloy pouring temperature is too low.

④The position of the inner gate is not good, forming a large resistance to movement.

2. The gas is obstructed, the surface of the undercast part is lubricated, but the shape is irregular.

①The place where it is difficult to set up the drainage system and the gas accumulates.

② When the molten metal is in motion, the turbulence is intense and envelops the gas.

3. There are residues in the plastic mold cavity.

① Improper amount of paint or spraying method may cause local paint deposition.

②The inlay gap of the molded part is too large, or the sliding cooperation gap is too large, and the metal enters during filling, and after the casting is released, it cannot be completely taken out and appears to be sandwiched in the gap. When the sheet metal is more protruding from the surrounding surface, the height of the protrusion is changed to the wall thickness of the casting when the mold is closed so that future castings will have a penetrating groove there. . This penetrating groove becomes a special form of undercasting. This kind of under-casting phenomenon mostly occurs in the case of a deep cavity composed of inlays.

Through the above introduction,Power Generating Tools  Factory hopes that you can simply refer to the content of this article in future use.