Design of injection mold for dust box cover of sweeping robot

doi:10.19491/j.issn.1001-9278.2022.11.020

Abstract

Abstract:

This paper analyzed the design process of an injection mold for the dust box cover of a sweeping robot in terms of the characteristics of the product and injection mold using antistatic acrylonitrile butadiene styrene copolymer （ABS） as a raw material. To meet the requirements of appearance， structure， and production capacity for the dust box cover of the sweeping robot， the mold was designed by adopting the layout of the first mock examination and two holes. The pouring system of converting the hot runner to the cold runner of the single nozzle mold and the side gate feeding form were also employed for the mold. This improved the molding yield and appearance quality of the product. This mold was designed with an inclined top core pulling mechanism of the front mold and a secondary core pulling mechanism of the slider to take off the reverses in two directions simultaneously. An inclined top core pulling mechanism of the rear mold combined with the ordinary slider core pulling mechanism was also adopted to complete the demolding， solving the demolding problem of the hole position reverses in different directions of the product and the sticking force problem of the ring deep rib position of the product. Through the actual production verification， the structural design of the mold was reasonable， and the product molding was stable， which met the requirement of production.

Key words: sweeping robot dust box cover, sliding block secondary core?pulling mechanism, hot runner, front die inclined top core pulling mechanism, after die oblique top retraction core pulling mechanism

CLC Number:

TQ320.66⁺2

ZHAO Liping, ZHANG Yanhua, YU Weibin, ZHANG Weihe. Design of injection mold for dust box cover of sweeping robot[J]. China Plastics, 2022, 36(11): 133-139.

Figures/Tables 10

Fig.1. Structure of dust box covers of sweeping robots

Fig.2. Mold assembly drawing

Fig.3. Gating system

Fig.4. Die core exhaust system

Fig.5. Slider exhaust system

Fig.6. Front mold inclined top core pulling mechanism

Fig.7. Slider secondary core pulling mechanism

Fig.8. Rear mold slider structure

Fig.9. Inclined roof structure of rear formwork

Fig.10. Combined structure of rear formwork

References 13

1	胡纲，赵振伦，潘宇，等.永久抗静电ABS性能研究［J］.工程塑料应用，2020，48（11）：33⁃37.
	HU G， ZHAO Z L， PAN Y， et al. Study on the performance of permanent antistatic ABS［J］. Application of Engineering Plastics， 2020，48（11）： 33⁃37.
2	张维合，冯婧，闫丽静，等.汽车高位制动灯盖板大型注塑模具设计［J］.中国塑料，2021，35（1）：98⁃102.
	ZHANG W H， FENG J， YAN L J，et al.Design of large⁃scale injection mold for automobile high⁃level brake lamp cover plate［J］. China Plastics， 2021，35（1）： 98⁃102.
3	温煌英.汽车尾箱盖护板热流道精密注塑模设计［J］.现代塑料加工应用，2020，32（6）：40⁃43.
	WEN H Y. Design of precision injection mold for hot runner of automobile boot cover guard plate［J］. Modern Plastic Processing and Application， 2020，32（6）： 40⁃43.
4	温煌英，赵利平，刘付国宇.汽车前保险杠热流道精密注塑模设计［J］.工程塑料应用，2020，48（3）：98⁃103.
	WEN H Y， ZHAO L P， LIU F G Y. Design of precision injection mold for hot runner of automobile front bumper［J］. Application of Engineering Plastics， 2020，48（3）： 98⁃103.
5	刘庆东.热流道复杂抽芯斜顶出双色注塑模具设计［J］.中国塑料，2018，32（10）：138⁃142.
	LIU Q D. Design of two⁃color injection mold with complex core pulling and inclined ejection in hot runner［J］. China Plastics， 2018，32（10）： 138⁃142.
6	徐勇军，邱腾雄.前后模双斜顶的多内凹面壳塑件注塑模具设计［J］.塑料科技，2018，46（7）：107⁃111.
	XU Y J， QIU T X. Design of injection mold for multi inner concave shell plastic parts with double inclined roofs of front and rear mold［J］. Plastic Technology， 2018，46（7）： 107⁃111.
7	周建安.行车记录仪面壳注塑模具设计［J］.中国塑料，2021，35（11）：133⁃137.
	ZHOU J A. Design of injection mold for dash cam shell［J］. China Plastics， 2021，35（11）： 133⁃137.
8	赵利平，温煌英，罗哲，等.汽车灯饰面盖零件热流道双色注塑模具设计［J］.工程塑料应用，2022，50（3）：96⁃100.
	ZHAO L P， WEN H Y， LUO Z， et al. Design of hot runner two⁃color injection mold for automotive lamp cover parts［J］. Engineering Plastic Application， 2022，50（3）： 96⁃100.
9	荣星，陈亚洲，蔡部林，等.相机结构件复合抽芯模具结构及冷却系统设计［J］.塑料，2021，50（6）：98⁃103.
	RONG X， CHEN Y Z， CAI B L， et al. Design of composi⁃te core pulling die structure and cooling system for camera structural parts［J］. Plastic， 2021，50（6）： 98⁃103.
10	孙令真，叶烁.分体空调底盘注塑模具设计［J］.中国塑料，2021，35（12）：129⁃136.
	SUN L Z， YE S. Design of injection mold for split air conditioner chassis［J］. China Plastics， 2021，35（12）： 129⁃136.
11	张维合，冯国树，朱晓敏，等.汽车右后门板顺序阀热流道大型薄壁注塑模具设计［J］.中国塑料，2022，36（1）：166⁃171.
	ZHANG W H， FENG G S， ZHU X M， et al. Design of large thin⁃wall injection mold for hot runner of sequence valve of right rear door panel of automobile［J］. China Plastics， 2022，36（1）： 166⁃171.
12	张维合，成永涛，冯婧，等.汽车后视镜镜壳热流道注塑模设计［J］.现代塑料加工应用，2020，32（5）：40⁃43.
	ZHANG W H， CHENG Y T， FENG J， et al. Design of hot runner injection mold for automobile rearview mirror shell［J］. Modern Plastic Processing and Application， 2020，32（5）： 40⁃43.
13	温煌英，冯国树，宋东阳，等.汽车B柱内饰板热流道大型精密注塑模设计［J］.工程塑料应用，2022，50（5）：101⁃106，120.
	WEN H Y， FENG G S， SONG D Y， et al. Design of large precision injection mold for hot runner of automobile B⁃pillar interior trim panel［J］. Engineering Plastic Application， 2022，50（5）： 101⁃106，120.

[1]	ZHANG Weihe, DENG Chenglin, ZHANG Yanhua, XU Yonglin. Design of fixed demoulding injection mould with sequential valve gating hot runner for door cladding under C⁃pillar of car [J]. China Plastics, 2022, 36(12): 127-132.
[2]	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.
[3]	WU Junchao. Process optimizationof injection mold for large plastic parts of automobile dashboard based on Moldflow [J]. China Plastics, 2021, 35(12): 121-128.
[4]	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.
[5]	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.
[6]	XU Xinhua. Design of Hot Runner Mould for Control-Knob Bi-color Injection Molding [J]. China Plastics, 2020, 34(9): 84-89.
[7]	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.
[8]	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.
[9]	LIU Qingdong. Design of Flip Injection Mould with Two-step Slide-pulling Mechanism for Car Storage Box [J]. China Plastics, 2019, 33(9): 104-108.
[10]	FENG Jing, ZHANG Weihe, DENG Chenglin. Design of Large Injection Mold with Hot Runner for Instrument Panel Storage Bin of Automobile [J]. China Plastics, 2019, 33(10): 94-99.
[11]	. Analysis of Optical Performance for Injection-compression-molded LED Lens [J]. China Plastics, 2018, 32(05): 103-108.
[12]	. Design of Injection Molds for a Two-color Cup with Handles Based on Conformal Cooling Technology [J]. China Plastics, 2018, 32(01): 131-136.
[13]	. Application of CAE Technology in Mold Design of Car Engine Hood [J]. China Plastics, 2017, 31(07): 132-136 .
[14]	. Design of Stacked-hot-runner-type Injection Molds for Outlet Joints of Cylinder Heads [J]. China Plastics, 2017, 31(05): 103-108 .
[15]	张维合 allenzhang. Design of Large-sized Injection Molds for Main Bodies of Auto Central Channels [J]. China Plastics, 2017, 31(05): 92-97 .