基于脱模力数学模型的花洒变截面弯管抽芯机构设计  

Design of Core⁃Pulling Mechanism of Variable Cross⁃Section Bend of Sprinkler Based on Mathematical Model of Demolding Force

作　　者：彭国荣 隋丽丽 陆龙福[3] PENG Guorong;SUI Lili;LU Longfu(School of Education,HUBEI MINZU UNIVERSITY,Enshi 445000,China;North China Institute of Science and Technology School of Science,Sanhe 065201,China;College of Mechanical and Electrical Engineering,Huanggang Polytechnic College,Huanggang 438002,China)

机构地区：[1]湖北民族大学教育学院,湖北恩施445000 [2]华北科技学院理学院,河北三河065201 [3]黄冈职业技术学院机电学院,湖北黄冈438002

出　　处：《中国塑料》2020年第10期63-68,共6页China Plastics

基　　金：国家自然基金项目(11702094)。

摘　　要：针对塑件变截面弧形弯管内壁及直管内壁的特点,采用微积分方法创新性地构建了弯管内壁脱模力数学模型,计算并获得了连体弯管型芯的脱模力。据此,优化设计了塑件弯管内壁的脱模机构,机构由单一油缸驱动2个扇形齿轮弯管型芯进行转动抽芯,确保了塑件的顺利脱模。在脱模机构设置的基础上,塑件的模具结构为1模2腔单次开模两板模具,且设置有2组哈弗滑块外螺纹脱模机构,1个联动式油缸驱动的扇形齿轮弯销抽芯机构。模具结构简单实用,机构动作可靠,能提供较好的设计参考价值。According to the characteristics of the inner wall of curved pipe with variable cross-section and the inner wall of straight pipe,the mathematical model was established for the demolding force of the inner wall of curved pipe by using a calculus method,and the demolding force of the core of connecting pipe was calculated.Based on the obtained results,the demolding mechanism of the inner wall of curved pipe was optimized and designed for the plastic part,and this mechanism was driven by a single oil cylinder to rotate and pull out the core of the two-sector gear bent pipes.On the basis of the demolding mechanism set in this work,the mold structure of plastic part was composed of a mold with two cavities and a single opening and two-plate mold.In this mold,there are two groups of external thread demolding mechanisms with a Haver slider and a sector gear bent pin core-pulling mechanism driven by a linkage oil cylinder.The die structure is simple and practical,and the action of mechanism is reliable.This design can offer a good reference for design of other similar molds.

关 键 词：变截面弯管 机构设计 弯管抽芯 注塑模 脱模力计算 数学模型 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]