Design of Large⁃scale Injection Mold for Car Bremsleuchte Cover

doi:10.19491/j.issn.1001-9278.2021.01.016

Abstract

Abstract:

In this work， we designed a large?scale injection mold with hot runners for the car bremsleuchte cover according to its structural characteristics and technical requirements. The problem in the large angle inclined roof lateral core?pulling process was successfully solved by using a new type of diagonal push rod with a cross assist bar. The accuracy and appearance of plastic parts were improved by using a hot runner and an arc latent gate. The safety and reliability of ejection balance of plastic parts and mold reset were ensured by taking the way of cylinder ejection and reset. The molding cycle was shortened to 35 s， and the production efficiency of the mold was increased by about 8% after adopting a mesh pattern 3D cooling system.

Key words: car bremsleuchte cover, large injection mold, hot runner, diagonal push rod with cross assist bar, mesh pattern and three?dimensional cooling system

CLC Number:

TQ 320.66⁺2

ZHANG Weihe, FENG Jing, YAN Lijing, LIU Fangfang, DENG Chenglin. Design of Large⁃scale Injection Mold for Car Bremsleuchte Cover[J]. China Plastics, 2021, 35(1): 98-102.

Figures/Tables 10

Fig.1. The car bremsleuchte cover

Fig. 2. Injection mold stracture of the car bremsleuchte cover

Fig.3. Gating system of mold

Fig.4. Submarine gating

Fig.5. Side core pulling mechanism

Fig.6. Core pulling mechanism with oblique top of cross auxiliary rod

Fig.7. Temperature Control System

Fig.8. Stereogram of the mold

Fig.9. The demoulding system

Fig.10. The exhaust system

References 9

1	张维合.注射模具设计实用手册［M］.北京：化学工业出版社，2011：112⁃177.
2	何镜奎，陈洪土. 汽车侧裙板的热流道大型注塑模具设计［J］. 中国塑料，2018，32（2）：134⁃137.
	HE J K，CHEN H T. Design of Large Injection Molds with Hot Runners for Automobile Side Aprons［J］. China Plastics.2018，32（2）： 134⁃137.
3	张维合.汽车注射模具设计要点与实例［M］. 北京：化学工业出版社，2016：23⁃45.
4	张维合. 基于顺序阀热流道技术汽车导流板注射模设计［J］.塑料科技，2018，46（12）： 100⁃105.
	ZHANG W H. Design of Injection Mold Based on SVG Hot Runner for Automobile Deflector［J］. Plastic Science and Technology.2018，46（05）： 100⁃105.
5	俞卫东. 汽车仪表板注射模设计［J］模具工业，2013，39（3）：70⁃75.
	YU W D. Injection Mould for Automobile Instrument Panel［J］.Engineering Plastics Appication，2013，39（03）： 70⁃75.
6	张维合.复印机定影器主板复杂抽芯精密注塑模设计［J］.现代塑料加工应用，2018，30（6）：49⁃53.
	ZHANG W H.Design of Precise and Complex Core Injection Mold for the Copier Fuser Board［J］.Modern Plastics Processing and Applications，2018，30（6）：49⁃53.
7	沈忠良，郑子军，肖国华，等.汽车中控面板IMD成组模具设计［J］. 工程塑料应用，2017，45（1）：70⁃75.
	SHEN Z L，ZHEN Z J，XIAO G H，et al.Design of IMD Group Mould for Central Control Panel in Automobile［J］.Engineering Plastics Appication，2017，45（01）： 70⁃75.
8	张维合.汽车副仪表板大型注塑模设计［J］.工程塑料应用，2015，43（5）：74⁃78.
	ZHANG W H.Design of Large Injection Mold for Automobile Auxillary Console［J］. Engineering Plastics Appication.2017，45（01）： 74⁃78.
9	张维合. 汽车后背门护板热流道大型注塑模设计［J］.中国塑料，2019，33（5）：102⁃108.
	ZHANG W H. Design of Large and Hot Runner Injection mold for the Rear Door of Automobile［J］.China Plastics，2019，33（5）：102⁃108.

[1]	ZHANG Weihe, FENG Guoshu, ZHU Xiaoming, WU Zichun, YE Mingshan, DU Hai, SONG Dongyang, WANG Jing. Design of large and thin⁃welled injection mold with SVG for car right⁃tuer hinten [J]. China Plastics, 2022, 36(1): 166-171.
[2]	WU Junchao. Process optimizationof injection mold for large plastic parts of automobile dashboard based on Moldflow [J]. China Plastics, 2021, 35(12): 121-128.
[3]	LIU Hongyan. Design of Hot Runner Injection Mold with Two Types of Multiple Core⁃pulling Mechanisms for Booster Cylinder [J]. China Plastics, 2021, 35(1): 103-109.
[4]	XU Xinhua. Design of Hot Runner Mould for Control-Knob Bi-color Injection Molding [J]. China Plastics, 2020, 34(9): 84-89.
[5]	LIU Shaohua, XIONG Jianwu, XU Wenqing, HU Zhiqing, CHEN Liming, WANG Zheneng. Structure Design of Hot Runner Injection Mold and Hot Cutting Mechanism in Mold for Door Hook Base Cover [J]. China Plastics, 2020, 34(9): 90-95.
[6]	Zijun ZHENG, Guohua XIAO, Zhongliang SHEN, Shaozeng YANG. Design of Vertical Injection Mold with Four⁃layered Hot Runners for Game Machine Handle [J]. China Plastics, 2020, 34(4): 96-101.
[7]	. Analysis of Optical Performance for Injection-compression-molded LED Lens [J]. China Plastics, 2018, 32(05): 103-108.
[8]	. Design of Injection Molds for a Two-color Cup with Handles Based on Conformal Cooling Technology [J]. China Plastics, 2018, 32(01): 131-136.
[9]	. Application of CAE Technology in Mold Design of Car Engine Hood [J]. China Plastics, 2017, 31(7): 132-136 .
[10]	. Design of Stacked-hot-runner-type Injection Molds for Outlet Joints of Cylinder Heads [J]. China Plastics, 2017, 31(5): 103-108 .
[11]	张维合 allenzhang. Design of Large-sized Injection Molds for Main Bodies of Auto Central Channels [J]. China Plastics, 2017, 31(5): 92-97 .
[12]	. Design of Injection Molds for a Sequentially Injection-molded Auto Front Bumper [J]. China Plastics, 2017, 31(2): 108-111 .
[13]	. Design of Large Injection Moulds for Printer Base Boards [J]. China Plastics, 2016, 30(07): 107-111 .
[14]	张维合 allenzhang. Design of Large Injection Moulds for Car Lefttuer Hinten [J]. China Plastics, 2016, 30(05): 98-103 .
[15]	. Design of Injection Molds with Core-pulling Mechanism and Hot Runner Systems for Screwed-bowl-covers [J]. China Plastics, 2015, 29(09): 92-95 .