Optimization Parameters of Injection Moulding Machine For Reducing Warpage of Dog Bone Plastic Part
The optimization of processing parameters on warpage of polypropylene (PP) in the application of injection moulding machine was studied. The appropriate parameters were adjusted to reduce the warpage defect on the tensile test specimen of dog bone. The type of injection moulding machine used in th...
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| Main Authors: | , , , , , , |
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| Format: | Conference or Workshop Item |
| Language: | en |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/6627/1/PPS28_-_MOHD_AMRAN.pdf http://eprints.utem.edu.my/id/eprint/6627/ |
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| Summary: | The optimization of processing parameters on warpage of polypropylene (PP) in the application of injection
moulding machine was studied. The appropriate parameters were adjusted to reduce the warpage defect on the tensile
test specimen of dog bone. The type of injection moulding machine used in this research is Arburg 420C 800-250C.
Four parameters that have been investigated; injection pressure, clamping pressure, back pressure and holding pressure.A concept of design of experiment (DOE) has been applied using Taguchi method to determine the suitable parameters.To measure the warpage of the dog bone, digital height gauge was used to measure the flatness of the part surface.According the analysis of variance (ANOVA), the most significant factor that effect the warpage was holding pressure by 57.82%, followed with back pressure by 25.75%, clamping pressure by 16.27% and injection pressure by 0.16%. Itis found that the optimum parameters setting that have been obtained were injection pressure at 950 bar, clamping pressure at 600 kN, holding pressure at 700 bar and back pressure at 75 bar. The depreciation value of warpage minimum index in this experiment was decreased by 4.6% after confirmation run. |
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