Experimental-Based Optimization of Injection Molding Process Parameters for Short Product Cycle Time

Table 4

Effect of process parameters on the on the product defect and the product cycle time.

Process parameters	Warpage	Volumetric shrinkage	Comment
Injection speed	Opposing effect	Opposing effect	Reducing the injection speed decreases the warpage and vol. shrinkage but increases the cycle time
Cooling time			Increasing the cooling time decreases the warpage and vol. shrinkage but increases the cycle time
Packing time			Increasing the packing time decreases the warpage and vol. shrinkage but increases the cycle time
Injection pressure	Assisting effect	Assisting effect	Increasing the injection pressure decreases the warpage and vol. shrinkage while decreasing the cycle time
Mold temperature			Reducing the mold temperature decreases the warpage and vol. shrinkage and decreases the cycle time
Melt temperature			Reducing the melt temperature decreases the warpage and vol. shrinkage and decreases the cycle time
Packing pressure	Not clear	Not clear	Increasing the packing pressure decreases the warpage and vol. shrinkage; however, from Figure 4c, the effect on the cycle time is not clear