Parameter Optimization of PET Plastic Preform Bottles in Injection Molding Process Using Grey-Based Taguchi Method

Table 3

Shrinkage values for PET preform.

Runs	Normalized sequence		Deviation sequence		Grey relation coefficient		GRG
	Diameter	Length	Diameter	Length	Diameter	Length
1	0.928	0.866	0.072	0.134	0.874	0.789	0.832
2	1.000	1.000	0.000	0.000	1.000	1.000	1.000
3	0.792	0.833	0.208	0.167	0.706	0.749	0.728
4	0.000	0.000	1.000	1.000	0.333	0.333	0.333
5	0.083	0.167	0.917	0.833	0.353	0.375	0.364
6	0.591	0.749	0.409	0.251	0.550	0.666	0.608
7	0.383	0.665	0.617	0.335	0.448	0.599	0.524
8	0.628	0.749	0.372	0.251	0.573	0.666	0.620
9	0.155	0.500	0.845	0.500	0.372	0.500	0.436