滑块与自动脱螺纹同步运动机构及模具设计

›› 2023, Vol. 37 ›› Issue (6): 117-122.

滑块与自动脱螺纹同步运动机构及模具设计

荣星¹,陈尧²,蔡部林³,林源琳²

1. 集美大学机械与能源工程学院
2. 集美大学海洋装备与机械工程学院
3. 厦门部林科技有限公司

收稿日期:2023-01-16 修回日期:2023-03-31 出版日期:2023-06-26 发布日期:2023-06-26
基金资助:
福建省高校产学合作项目;厦门市科技补助项目资助

Design of synchronous motion mechanism and mold for slide block and automatic thread demolding

Received:2023-01-16 Revised:2023-03-31 Online:2023-06-26 Published:2023-06-26

摘要/Abstract

摘要： 针对某电力设备接线柱保护套筒的结构特点，设计了丝杆螺母副驱动滑块直线移动、螺纹型芯边旋转边随滑块直线移动两套运动机构，实施自动脱螺纹；滑块齿轮、脱螺纹齿轮的齿数相同，丝杆螺距与螺纹型芯螺距一致；液压马达驱动主动齿轮旋转，主动齿轮同时与滑块齿轮及脱螺纹齿轮啮合，保证了滑块与脱螺纹同步运动，不会出现塑件螺纹被拉坏情况。保护套筒塑件材质为30 %玻璃纤维增强聚对苯二甲酸丁二醇酯（PBT/30 %GF），注射成型时，要求模具型腔、型芯的热量散失一定要快速而均匀，模具的冷却效果会直接影响塑件的弯曲变形，设计的螺纹型芯轴向移动由滑块驱动，有利于冷却水路的设计与加工，解决了螺纹型芯冷却问题。针对设计方案进行了模流分析验证，缩短了产品的开发周期，保证了产品质量。

关键词: 自动脱螺纹, 同步运动, 冷却系统, 模流分析, 注塑模具

Abstract: According to the structural characteristics of the terminal protection sleeve of an electric power equipment， two sets of motion mechanisms were designed to implement automatic thread demolding. These two mechanisms are a screw rod nut pair driving slider to move in a straight line and a thread core edge rotating in a straight line with the slider. The teeth of the slider gear and thread demolding gear have the same numbers， and their screw rod pitch is the same as that of the thread core. The hydraulic motor can drive the driving gear to rotate， and the driving gear is engaged with the slider gear and thread demolding gear at the same time. This ensures that the slider moves synchronously with the thread demolding without any damage in the plastic part thread. The plastic part of the protective sleeve was made of 30 % glass?fiber-reinforced polybutylene terephthalate （PBT+30 % GF）. During the injection molding， the heat loss of the mold cavity and core should be fast and uniform. The cooling effect of the mold directly influenced the bending deformation of the plastic part. The axial movement of the designed spiral core was driven by the slider， which is advantageous to the design and processing of the cooling water path and the solution of the cooling problem of the threaded core. The mold flow analysis and verification were carried out for the design scheme， which shortened the development period of products and ensured the product quality.

Key words: automatic thread demoulding, synchronous motion, cooling system, mold flow analysis, injection mould

荣星陈尧蔡部林林源琳. 滑块与自动脱螺纹同步运动机构及模具设计[J]. , 2023, 37(6): 117-122.

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