A laminated mould with 16 cavities was designed to meet the requirements of the product quality,appearance,production batch and other process characteristics of a health drink bottle cap.According to asymmetric trapezoidal thread of inner cap,top pits,anti-skid stria and other structural features,the injection system,cooling system,ejector mecha-nism,parting surface selection of the mould was introduced.The gap between the swollen hot runner nozzle and the cavity,the relationship between the position of the inlet and out-let of the cooling water channel and the temperature difference control,the matched rela-tionship between the stripping plate and the core and so on was analyzed to solve problems of the incidental strain in demoulding,deformation,low precision of inner surface and en-sure the forming quality of the health drink cap and achieve continuous mass production.%为满足某保健饮品瓶盖产品质量、外观形态、生产批量等工艺特性和生产需求,设计了1模16腔的叠层注塑模具.针对瓶盖的内表面非对称梯形螺纹、顶部凹点、防滑纹等结构特点,介绍了模具的浇注系统、冷却系统、顶出机构、分型面选择等结构,重点分析和计算了膨胀后的热流道喷嘴与型腔之间的间隙、冷却水道进、出口位置与温差控制的关系、脱模板与型芯的配作关系等,解决了瓶盖内表面脱模易拉伤、变形、精度不高等问题,保证了保健饮品瓶盖的成型质量,且实现了连续大批量生产.
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