The formula for mold shrinkage is: α = (D-M)/D;
Among them, the die size D at room temperature and the product size M after molding.
The commonly used plastic shrinkage rate is as follows:
1. Plastic name: PCTA
Actual open mold shrinkage: 0.003
2, plastic name: PETG
Actual mold shrinkage: 0.004
Molding Product Type: Cosmetics
3, plastic name: AS
Actual mold shrinkage: 0.005
4, plastic name: PBT
Actual mold shrinkage: 0.004
5, plastic name: ABS
Actual mold shrinkage: 5/1000
6, plastic name: PP
Actual mold shrinkage: 16/1000
7, plastic name: POM
Actual mold shrinkage: 16/1000
8, plastic name: PC
The actual mold shrinkage rate: 8/1000
9, plastic name: PA6
The actual mold shrinkage rate: 0.020.