Fig 1.
The weld line formation mechanism during injection molding process: (a) without mold temperature control system, and (b) with mold temperature control system.
Fig 2.
Testing sample ASTM D638 (Unit: mm).
Fig 3.
Mold plates for molding process.
Table 1.
Injection molding parameters for PA6 samples.
Fig 4.
Stress-strain diagrams of sample 1 of PA6 composite.
Fig 5.
Comparison of UTS values of PA6 samples with weld line at different filling times.
Fig 6.
Comparison of elongation values of PA6 samples with weld line at different filling times.
Fig 7.
Comparison of UTS values of PA6 samples with weld line at different packing time.
Fig 8.
Comparison of elongation values of PA6 samples with weld line at different packing time.
Fig 9.
Comparison of UTS values of PA6 samples with weld line at different melt temperatures.
Fig 10.
Comparison of elongation values of PA6 samples with weld line at different melt temperatures.
Fig 11.
Comparison of UTS values of PA6 samples with weld line at different mold temperatures.
Fig 12.
Comparison of elongation values of PA6 samples with weld line at different mold temperatures.
Table 2.
Summary of molding parameters for good UTS value and elongation value of PA6 samples.
Fig 13.
The R-squared results of PA6 of the ANN method.
Table 3.
The table of optimized results for PA6.
Table 4.
Response table for means of UTS values.
Table 5.
Response table for means of elongation values.
Fig 14.
SEM picture of fracture surface of PA6 samples with weld line: (a1)–(a2) sample 3, (b1)–(b2) sample 7, (c1)–(c2) sample 12, and (d1)–(d2) sample 16.