Reducing the Sink Marks of a Crystalline Polymer Using External Gas-Assisted Injection Molding

Table 4

Uniform table remarking , including the unimportant parameters designed using the uniform design.

Number	Parameter					Result
	Material temperature (^oC)	Injection pressure (MPa)	Injection speed (mm/s)	Packing pressure (MPa)	Packing time (s)	Sink marks (mm)
1	180	110	40	80	5	0.116
2	220	110	50	20	4	0.111
3	200	110	60	60	1	0.096
4	180	80	60	20	4	0.096
5	200	100	40	20	2	0.092
6	180	100	70	40	3	0.103
7	220	100	30	100	3	0.102
8	200	80	70	100	4	0.096
9	200	70	50	80	3	0.089
10	200	90	30	40	5	0.096
11	180	90	50	100	1	0.085
12	220	90	70	80	2	0.087
13	220	80	40	40	1	0.091
14	220	70	60	60	5	0.085
15	180	70	30	60	2	0.103