What is the mold retention time?

Mold retention time: The period from the end of pressure holding to the opening of the mold to eject the casting is called the mold retention time.

If the mold retention time is too long, the clamping force will increase, ejection will be difficult, and the ejection will be deformed or cracked.

If the mold retention time is too short, the ejection will be easy to deform or even penetrate, affecting the dimensional accuracy of the casting.

How to choose the mold retention time?

Zinc alloy wall thickness <3mm 5~10S; wall thickness 3~4mm 7-12S; wall thickness >5mm 20~25S

Aluminum alloy wall thickness <3mm 7-12S; wall thickness 3~4mm 10~15S; wall thickness >5mm 25-30S

Magnesium alloy wall thickness <3mm 7-12S; wall thickness 3~4mm 10~15S; wall thickness >5mm 15-25S

Copper alloy wall thickness <3mm 8-12S; wall thickness 3~4mm 15-20S; wall thickness >5mm 25-30S

The lower limit can be used for die-cast alloys with large shrinkage, high high-temperature strength, strong mold cooling capacity, and relatively complex casting structures.