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In order to address cracking failure of door arrester of a vehicle in door slamming durability test, polarized microscope and mold flow analysis are used to analyze defects in parts and develop process optimization measures. The results show that extending the shot blasting time of steel core can effectively remove surface burrs and reduce microdefect and stress concentration around sharp boundary after injection molding. Extending boiling time can improve water absorption of plastic cladding, thereby enhancing the notch impact strength and failure stress. Adding exhaust insert in the tooling can improve parting line and reduce air pockets inside the plastic cladding. Adjust injection hole of check link arm to transfer the uneven flow of material to low stress zone, reducing failure risk. Finally, the reliability of optimized parts is verified via door slamming durability test, which solves plastic cladding cracking failure.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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