Failure Analysis of Injection Molding of Plastic Fuel Tank Welding Accessories

doi:10.19491/j.issn.1001-9278.2020.08.010

China Plastics ›› 2020, Vol. 34 ›› Issue (8): 63-66.DOI: 10.19491/j.issn.1001-9278.2020.08.010

• Processing and Application • Previous Articles Next Articles

Failure Analysis of Injection Molding of Plastic Fuel Tank Welding Accessories

Aoxiang CHEN¹, Zhihong WANG¹, Hang GAO²()

^1.School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China
^2.Wuhan Kinderly Technology Co, Ltd, Wuhan 430070, China

Received:2020-01-13 Online:2020-08-26 Published:2020-08-26

Abstract

Abstract:

A good appearance and high quality were achieved for the welding accessory products through the analysis and verification of failure modes such as welding cracks, insert deformation and running glue during the injection molding process of the fuel filler assembly, the fuel pump flange assembly, and the drain assembly of plastic fuel tank. This lays the solid foundation for ensuring the high quality of plastic fuel tanks.

Key words: plastic fuel tank, injection molding, welding cracks, running glue

CLC Number:

TQ320.66⁺2

Aoxiang CHEN, Zhihong WANG, Hang GAO. Failure Analysis of Injection Molding of Plastic Fuel Tank Welding Accessories[J]. China Plastics, 2020, 34(8): 63-66.

材料名称	熔体流动速率/g·10 min^-1	密度/g·cm^-3	耐环境应力开裂性能（ESCR）/h	拉伸屈服应力/MPa	断裂伸长率/%	弯曲模量/MPa
PTX?6	7	0.949	>1 000	24	>700	1 100
MS201B	8.4	0.948	720	24	835	1 029
PA6GF15	67.65	1.23	-	125.6	-	5 800

材料名称	熔体流动速率/g·10 min^-1	密度/g·cm^-3	耐环境应力开裂性能（ESCR）/h	拉伸屈服应力/MPa	断裂伸长率/%	弯曲模量/MPa
PTX?6	7	0.949	>1 000	24	>700	1 100
MS201B	8.4	0.948	720	24	835	1 029
PA6GF15	67.65	1.23	-	125.6	-	5 800

次数	进胶点规格	分流道规格	主流道规格
第一次	1.8 mm×0.8 mm	Φ6 mm	6 mm、锥度1 °
第二次	6.9 mm×3.2 mm	10 mm×9 mm	8.2 mm、锥度2 °

次数	进胶点规格	分流道规格	主流道规格
第一次	1.8 mm×0.8 mm	Φ6 mm	6 mm、锥度1 °
第二次	6.9 mm×3.2 mm	10 mm×9 mm	8.2 mm、锥度2 °

次数	进胶点规格	分流道规格	主流道规格
第一次	0.86 mm×0.58 mm	半圆形Φ4 mm	Φ6.87 mm、锥度2 °
第二次	1.37 mm×2.73 mm	5.55 mm×3.5 mm	Φ6.87 mm、锥度2 °
第三次	1.37 mm×2.73 mm	Φ6 mm	Φ6.87 mm、锥度2 °

Failure Analysis of Injection Molding of Plastic Fuel Tank Welding Accessories

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次数	进胶点规格	分流道规格	主流道规格
第一次	1.6 mm×0.7 mm	Φ5 mm	Φ5 mm、锥度0.7 °
第二次	3.7 mm×1.3 mm	Φ6 mm	Φ8.4 mm、锥度2 °

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