The purpose of focusing on weight as a reference element is to focus on the concept of compactness.The degree of compactness is different under different conditions, so we need to look at this point reasonably.

Generally speaking, if the surface of thin - walled castings is to be done well, the injection velocity must be fast. Thick wall surface to do well, the process of shooting must be strong.

Thin - walled surface to do a good job, the injection rate of the conventional machine is basically ok.For thick wall parts that require both surface and compactness, in addition to fast shooting speed, it is also necessary to ensure the inner compactness of the casting. During die-casting, after the explosive power of the two-speed nitrogen cylinder, the pressure supplement of the conventional machine may be insufficient.

In fact, speed and force are inversely proportional, like a car, low gear, the force is the largest, high gear force is not strong.Therefore, for thick wall parts with required surface, if there is a force supplement in the forming process, it can be better to assist the force this element, powerful and speed, compactness will be better.

Combined with the actual situation of die-casting, the relationship between force and speed, the engineer added the supercharging action to the machine to make the machine have this characteristic.Of course, reasonable excellent mold is the main part of improving the product excellent rate, the machine and skilled operators play an important auxiliary role.

The concept of force and speed for castings with different thickness and thin wall is clear, and the good standard of castings can be treated reasonably if the key points of each process are properly applied.

The sprue sand hole of thick wall products is usually caused by shrinkage hole caused by too high mold temperature. Under the condition that mold temperature control is not ideal enough, if the follow-up supplementary force is enough, it can make up for the sand hole to some extent.