摘要
为了采用玻纤增强尼龙66注射成型滚焊机润滑油箱盖塑件,设计了一副两板热流道注塑模具,模腔布局为1模1腔,塑件的收缩率采用差异化设置,其中,长度、宽度方向的收缩率均为0.46%,高度方向为0.50%。在浇注系统中,热流道嘴与主浇道中心的中心距误差控制在±0.02 mm以内,热嘴长度误差控制在±0.05 mm以内。使用5个脱模机构用于塑件复杂特征的脱模,其中,滑块驱动斜顶复合机构中斜顶的顶出斜角为10°,以确保足够的抽芯距离;在弯销驱动斜滑块复合机构、斜导柱驱动斜滑块二次抽芯机构中,两个导向导轨之间的倾斜角大于90°,以防驱动夹死。成型件材料选用高耐磨模具钢1.2343,热处理硬度为HRC59~63,以满足模具高寿命要求。
In order to use glass fiber reinforced nylon 66 to finish the injection molding of the lubricating oil tank cover plastic parts of seam welding machine,a kind of two-plate hot runner injection mold was designed.The mold cavity layout is one mold with one cavity.The shrinkage rate of the plastic part is set differently.Among them,the shrinkage rate in the length and width directions is 0.46%,and it in the height direction is 0.50%.In the gating system,the tolerance of the center distance between the hot runner nozzle and the center of the sprue is controlled within±0.02 mm,and the tolerance of the length of the hot nozzle is controlled within±0.05 mm.Five ejection mechanisms are used for the ejection of complex features of plastic parts.Among them,in the slider driving lifter compound mechanism,the inclined ejection angle of the lifter is 10°to ensure sufficient core pulling distance.In the angular cam driving angel slider compound mechanism and the angle pin driving the angle slider secondary core-pulling mechanism,the inclination angle between the the two guide rails is more than 90ºto prevent the drive from being clamped.The material of the formed parts is made of high wear-resistant mold steel 1.2343,and the heat treatment hardness is HRC59–63,so as to meet the requirements of long life of the mold.
作者
何晖
He Hui(School of Mechanical and Electronic Engineering,Jingdezhen University,Jingdezhen 333032,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2022年第9期87-91,114,共6页
Engineering Plastics Application
关键词
滚焊机
润滑油箱盖
热流道
注塑模具
脱模
复合机构
seam welding machine
lubricating oil tank cover
hot runner
injection mold
demoulding
compound mechanism
