摘要
根据车门扶手骨架产品的形状与技术要求,设计了基于时序阀控制的三点针阀式热流道模具,采用了潜伏式牛角浇口进胶,结合CAE技术对塑件进行气辅成型分析;在动模处设计了溢料井的结构,在定模侧设计了模内热切机构,使得溢料口与产品自动分离;T1区域为产品的外观面,厚度为22 mm,长度达265 mm,采用气辅成型工艺,解决了此处壁厚过厚的成型问题;T3区域位于产品的侧面,有4处厚度为1.2 mm的加强筋,与水平方向成7.5°的夹角,设计了“斜滑块+斜导柱”的抽芯机构;T4区域为两处带侧向通孔的卡扣特征,设计了“斜顶块+斜顶杆+万向滑座”脱模机构;T2区域位于产品的底部,有多处的boss柱结构,设计了分段式的司筒顶出结构,增强了司筒的强度;顶出系统中采用两个固定在动模B板上的方形液压缸形成平衡推出,在顶针板上设计了4组定距拉杆的结构,形成了二次顶出,解决了分段式司筒顶出距离不足的问题;冷却系统方面采用了“直通式与隔水片式”水路。试模后,该模具各运动机构无干涉,产品T1区域的表面质量良好,为相关气辅模具的研发,提供了有用的参考价值。
According to the shape and technical requirements of the car door armrest framework product,a three-point needle valve hot runner mold based on timing valve control was designed.The latent horn gate was used to inject glue,and CAE technology was used to analyze the gas assisted moulding of the plastic part.A structure of overflow well was designed at the dynamic mould,and an internal hot cutting mechanism was designed on the fixed mould side to automatically separate the overflow port from the product.The T1 area is the exterior surface of the product,with a thickness of 22 mm and a length of 265 mm.The column features a gas assisted forming process,which solves the problem of excessive wall thickness in the product.The T3 area is located on the side of the product,with four reinforcing ribs with a thickness of 1.2 mm,forming an angle of 7.5°with the horizontal direction.A core pulling mechanism of"inclined slider+inclined guide column"is designed.The T4 area has two buckle features with lateral through-holes,and a demoulding mechanism of"inclined top block+inclined top rod+universal sliding seat"has been designed;The T2 area is located at the bottom of the product,with multiple boss column structures.A segmented ejector structure has been designed to enhance the strength of the ejector.In the ejection system,two square hydraulic cylinders fixed on the moving mould B plate are used to form a balanced ejection.Four sets of fixed distance pull rods are designed on the ejector pin plate to form a secondary ejection,solving the problem of insufficient ejection distance of the segmented driver cylinder.The cooling system adopts a"straight through"and a"water separator"waterway.After the trial mould,the various motion mechanisms of the mould does not interfere,and the surface quality of the T1area of the product is good,providing useful reference value for the development of related gas assisted mould.
作者
谢祖通
翁礼杰
李朋
傅莹龙
夏文明
Xie Zutong;Weng Lijie;Li Peng;Fu Yinglong;Xia Wenming(Taizhou Vocational College of Science and Technology,Taizhou 318000,China;Taizhou Key Laboratory of MoldIntelligent Manufacturing,Taizhou 318000,China;Ningbo Runhua Full Core Microelectronics Equipment Co.,Ltd.,Ningbo 315000,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2023年第12期100-105,共6页
Engineering Plastics Application
基金
2023年台州市科技计划项目(23gyb29)
2023年度台州科技职业学院校级课题(23QNZ04)
2022年台州市科技计划项目(22gyb25)。
关键词
汽车扶手骨架
阀式热流道
气辅成型
模内热切
car armrest frame
valve type hot runner
gas assisted moulding
hot cutting in mould
