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Based on the material consistency and mechanical properties, fracture morphology analysis, structure analysis, stress analysis, failure simulation, broken door handle shell material consistency and mechanical properties met the design requirements, it was found that the parts away from the tip of the modeling of gate structure was prone to stress fracture. Clearance between shell and skeleton was increased from 0.2 mm to 1.2 mm, handle tip comer with rectangular links was changed to bevel and circular arc transition, the position of mold feeding mouth was changed, temperature of the mold was fixed at 50~60 ℃, the drying time of baking material before injection was increased from 1 h to 2 h, the baking stress relief of 80 ℃ for an hour was increased after injection, and the pressure holding time was reduced from 7 s to 4 s, the stress could be reduced which eliminated handle fracture. After the rectification, the parts were verified and tracked, and no similar failure occurred again.
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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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