Design of Injection Mold with Floating Roof Side Core⁃pulling Mechanism for Rain Deflector

doi:10.19491/j.issn.1001-9278.2020.05.015

Abstract

Abstract:

This paper reported the structural design of a two?plate injection mold for the special?shaped plastic part of the rain deflector of automobile. This mold was designed on the basis of the difficulty in the complete demolding of the plastic part by the conventional slide core?pulling and inclined top mechanisms. Aiming at a breakthrough in the traditional design scheme, a core floating top side core?pulling mechanism was designed to realize the automatic injection production of the plastic part. In this mechanism, the plastic part and the part of the mold were ejected through an ejector plate and an ejector rod after the mold was opened, and then the plastic part was ejected from the local core through the side secondary ejection mechanism to realize the complete demolding. Such a design effectively simplified the mold structure, reduced the difficulty level in the processing and manufacturing of the mold and also reduced the manufacturing cost of the mold. The mold structure was complex and novel, but it was stable and reliable. This work provided a good reference for the innovative design of molds and mechanisms of special?shaped plastic parts.

Key words: special?shaped plastic part, mechanism design, mold structure, demolding, injection molding

CLC Number:

TQ320.66⁺2

Zhongqi YI, Liucao HE. Design of Injection Mold with Floating Roof Side Core⁃pulling Mechanism for Rain Deflector[J]. China Plastics, 2020, 34(5): 97-101.

Figures/Tables 5

Fig.1. Structure of plastic parts

Fig.2. Setting of parting and demoulding

Fig.3. Mould structure

Fig.4. Core pulling mechanism with floating?ejecting

Fig.5. Working principle of the mould

References 15

1	陈黎明,孙忠刚,简忠武,等.基于Moldflow和UG的异型塑件注射模具设计[J].塑料工业,2018,46(10):59⁃62.
	CHEN L M, SUN Z G, JIAN Z W, et al. The Injection Mould Design of Special Plastic Part Based on Moldflow and UG[J]. China Plastic Industry, 2018,46(10): 59⁃62.
2	黄力,许傲.自动抽液瓶盖脱模机构与注塑模具设计[J].塑料科技,2016,44(8):80⁃84.
	HUANG L, XU A. Design of Injection Mould and Demoulding Mechanism of Automatic Liquid Suction Bottle Cap[J]. Plastics Science and Technology, 2016, 44(8): 80⁃84.
3	温瑞,肖国华.传感器载体注射模具设计[J].塑料,2017,46(3):74⁃78.
	WEN R, XIAO G H. The Design of Injection Mould for A Sensor carrier[J]. Plastics, 2017,46 (3): 74⁃78.
4	卞平.热流道双叠层注射模具设计[J].塑料工业,2017,45(10):65⁃68.
	BIAN P. Design of Injection Mold with Double Stack and Hot Runner Gate System[J].China Plastics Industry, 2017,45(10): 65⁃68.
5	钟锋良.基于二次抽芯机构标准化的发射器面盖注射模设计[J].塑料科技,2016,44(9):63⁃67.
	ZHONG F L. Design of Injection Mold with Two Time Core Pulling Based on Standard for Active Emitter [J].Plastics Science and Technology, 2016,44(9): 63⁃67.
6	李春玲.工业机器人接插转动板注射模具设计[J].工程塑料应用,2019,47(6):87⁃91.
	LI C L. Design of Innovative Mould for Connecting Rotary Plate of Industrial Robot[J].Engineering Plastics Application, 2019,47(6): 87⁃91.
7	郑爱权.储物箱盒盖机械式自动抽芯机构设计[J].塑料,2017,46(5):111⁃114.
	ZHENG A Q. Design of Automatic Core Pulling Mechanism Mechanical Storage Box Lid[J]. Plastics, 2017,46(5): 111⁃114.
8	范国良,路英华.周转箱注射模具及其四侧面滑块推出脱模机构设计[J].工程塑料应用,2018,46(9):94⁃99.
	FAN G L, LU Y H. Design of Injection Mould with Four Special Mechanism and Gas Auxiliary Ejection for Transform Box[J].Engineering Plastics Application, 2018,46(9): 94⁃99.
9	邓远华,熊建武,梁蓓,等.锥台镂空环圆周旋转抽芯机构模具设计[J].工程塑料应用,2019,47(9):98⁃102.
	DENG Y H, XIONG J W, LIANG B, et al.Mould Design of Conical Table Hollow Ring with Circular Revolving Core⁃pulling Mechanism[J].Engineering Plastics Application, 2019,47(9): 98⁃102.
10	聂艳平,贺柳操.洗发液喷嘴瓶盖弯管与螺纹脱模机构及其注射模具设计[J].工程塑料应用,2019,47(2):76⁃81.
	NIE Y P, HE L C.Mold Design of Bend Pipe and External Thread Demoulding Mechanism for A Shampoo Nozzle [J]. Engineering Plastics Application, 2019,47 (2): 76⁃81.
11	冯文健,黄镇谨,王华金.数据线插头盖二次顶出斜顶脱模机构及注射模具设计[J].工程塑料应用,2019,47(7):93⁃99.
	FENG W J, HUANG Z J, WANG H J. Design of Injection Mould and Inclined Top Ejecting Mechanism with Secondary Ejection of Data Line Plug Cover[J]. Engineering Plastics Application, 2019,47 (7): 93⁃99.
12	王怀奥,肖国华.电饭煲注射模具自动脱模机构及控制机构设计[J].中国塑料,2017,31(9):137⁃144.
	WANG H A, XIAO G H. Design of Automatic Demoulding Mechanism and Control Mechanism for Injection Mold of Rice Cooker [J]. China Plastics, 2017,31(9): 137⁃144.
13	贾林玲.一种内外螺纹同步脱模的抽芯机构及模具设计[J].塑料科技,2016,44(8):75⁃79.
	JIA L L. Core Pulling Mechanism and Mold Design of Internal and External Thread Synchronization Stripping[J]. Plastics Science and Technology, 2016,44(8): 75⁃79.
14	许傲.斜度头洗发液瓶盖脱模机构及模具设计出[J].塑料,2017,46(4):102⁃105.
	XU A. Demoulding Mechanism and the Mould Design for A Shampoo Bottle Head Cover [J]. Plastics, 2017,46(4): 102⁃105.
15	陈黎明,熊建武,沈忠良.内壁六面包围框形塑料件脱模机构及模具设计[J].工程塑料用,2019,47(9):87⁃93.
	CHEN L M, XIONG J W, SHEN Z L.Design of Compound Core⁃pulling Mechanism and Injection Mold for Six⁃Bread Frame⁃Shaped Parts with Inner Wall[J].Engineering Plastics Application, 2019,47(9): 87⁃93.

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