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《工程塑料应用》 2020年第05期
DOI:10.3969/j.issn.1001-3539.2020.05.018
单齿条驱动双孔内螺纹型芯脱模机构注塑模具设计
岳强
浙江纺织服装职业技术学院机电与轨道交通学院,浙江宁波 315211 
Injection Mould Design with Double Hole Internal Thread Core Demoulding Mechanism Driven by Single Rack
Yue Qiang
The Faculty of Electrical and Rail Traffic, Zhejiang Fashion Institute of Technology, Ningbo 315211, China 
摘要:设计了一种一模两腔两板注塑模具用于雾化器接头塑件的注射成型。基于模具内两个塑件的内螺纹孔布置于同侧、需要同步进行内孔脱螺纹的需要,设计了一种单齿条驱动双孔内螺纹型芯脱模机构,来实现两者的同步脱螺纹;机构中,驱动齿条安装于模具定模板上,内孔螺纹脱模的机构安装于动模板上;模具打开时,动模上的脱模机构在齿条的驱动下,通过中间传动齿轮驱动两个塑件的螺纹型芯转动,从而,两个螺纹型芯在各自螺纹导套的螺纹副驱动下,实现塑件内孔及内孔上内螺纹特征的脱模。运用该机构进行脱模,能使模具结构得到简化,模具结构尺寸相对比较小,且无须借助外接动力来进行驱动,降低了模具的制造成本,并且解决了现有技术中脱螺纹效率不高、内螺纹脱模易产生变形的问题。 
Abstract:A two-plate injection mould with two cavity was designed for injection molding of atomizer joint plastic part. In view of the need for synchronous thread demoulding of the inner holes of two plastic parts on the same side in a two cavity mould, a double hole internal thread core demoulding mechanism driven by single rack was designed for the synchronous demoulding of the two threaded holes. In the mechanism, the driving rack is fixed on the fixed mould plate, while the mechanism for demoulding the inner hole thread is fixed on the moving mould plate. When the mould is opened and moved, under the driving of the rack, the demoulding mechanism on the moving mould can drive the thread cores of the two plastic parts to rotate through the intermediate transmission gear, and the two thread cores are respectively driven by the thread pair of the thread guide sleeve for realizing the demoulding of the inner hole and the inner thread feature on the inner hole of the plastic part. By using the mechanism for demoulding, the mould structure can be simplified, the mould structure size is relatively small, and no external power is needed to drive, reducing the manufacturing cost of the mould and solving the problems of low efficiency of thread demoulding and easy deformation of internal thread demoulding in the prior technology. 
关键词:机构设计;结构;内螺纹;脱模;注塑 
Keywords:mechanism design; structure; internal thread; demoulding; injection molding 
本文引用格式:
岳强.单齿条驱动双孔内螺纹型芯脱模机构注塑模具设计[J].工程塑料应用,2020,48(5):98-102.
Yue Qiang. Injection mould design with double hole internal thread core demoulding mechanism driven by single rack[J]. Engineering Plastics Application,2020,48(5):98-102. 

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