摘要
利用UG对显微镜镜筒及模具进行三维造型,该模具在XS-ZY-125型注射机上成型,一模两腔,浇注系统采用矩形侧浇口浇注。根据塑件的形状特点对其进行工艺性分析,塑件为圆筒形件,长158 mm,在圆筒形一端135 mm处有细颈现象,筒形外径φ=36 mm。考虑到注射机的开模行程及装模空间,因此,分型面选在圆筒形的柱体纵向截面处。由于筒身有细颈结构,需要分成两段侧向分型抽芯,抽拔距为136 mm,采用液压侧向分型抽芯,另一端抽拔距为25 mm处采用斜导柱侧向分型抽芯。筒身外侧还有一筒状分支,抽拔距为13 mm,为了简化模具结构,采用弯销侧向抽芯。该模具的最大特点是采用先复位机构,当斜导柱侧向分型抽芯时,斜导柱在定模,滑块在动模,顶出机构与斜滑块在复位时发生干涉,采用楔杆三角滑块先复位机构,能够避免复位时滑块与顶杆相撞。
Three-dimensional modeling for microscope tube and mold were implemented by the use of UG. The mold was installed in the XS-ZY-125 injection machine. Structure of a mold with two cavities and gating system of rectangular side gate were adopted. According to the process analysis of shape characteristics of the plastic parts,thin necks were observed at 135 mm of end the cylindrical plastic parts with length of 158 mm and outer diameter φ36 mm. The parting surface was selected at the longitudinal section of the cylindrical cylinder in consideration of the mold opening stroke and the mold clamping space of the injection machine. Due to the thin neck structure at the tube body,two side parting core pulling mechanisms were used,and the pulling distance of 136 mm was implemented by hydraulic cylinder side parting core pulling mechanism,and the inclined guide pillar side parting core pulling mechanism was adopted for the other pulling distance of 25 mm. In order to simplify the mold structure,a bent pin side parting core pulling mechanism was used for the tubular branch on the outside of the tube body with a pulling distance of 13 mm. The design of first resetting mechanism was regarded as the biggest characteristic of the mold. The inclined guide pillar was installed in the fixed die and sliding block was fixed in movable die,so the ejection mechanism would be interfered by the inclined slider during resetting on the process of side parting core pulling of inclined guide pillar. To avoid the collision between the slider and the ejector during resetting,wedge-rod triangular slider first resetting mechanism was adopted.
作者
王建玲
张丹
王永瑛
WANG Jianling;ZHANG Dan;WANG Yongying(Tangshan College,Tangshan,Hebei 063000,China;Jiangsu University,Zhenjiang,Jiangsu 212013,China)
出处
《塑料》
CAS
CSCD
北大核心
2020年第5期143-146,共4页
Plastics
关键词
显微镜镜筒
弯销抽芯
先复位机构
斜导柱抽芯
液压抽芯
microscope tube
bent pin core pulling
first resetting mechanism
inclined guide pillar core pulling
hydraulic core pulling
