Multiobjective Optimization Method for Polymer Injection Molding Based on a Genetic Algorithm

Table 2

Experimental factors and their levels.

No.	Factors	Abbr.	Levels
			Low	High
1	Rib radius (mm)	r	0	0.8
2	Rib relative thickness	t	0.4	0.8
3	Rib relative height	h	2	4
4	Sprue diameter (mm)	d	6	12
5	Gate location	s	A	B
6	Injection time (s)		1.97	2.17
7	Melt temperature (°C)		210	250
8	Mold temperature (°C)		20	40
9	Coolant temperature (°C)		10	40
10	Coolant time (s)		20	50
11	The Re number of coolant	RE	9000	11000
12	Cooling channel diameter (mm)	D	8	12
13	V/P switch-over point	V/P	90%	99%
14	Packing pressure (MPa)		25	45
15	Packing time (s)		6	14

Annotation: wall thickness of the physical model presented in Section 3.1 was 2.33 mm.
Diameter of the sprue was double that of the runner.