CAJ | 학술논문

针对传统的双色注塑模具尺寸大、结构复杂、对注塑机尺寸要求高并且产品合格率不高等缺点，以汽车的通风盖板为例设计了一种新型的封刀片式双色注塑模具。封刀片采用镶拼结构，当注射硬质塑料时，封刀片处于上限位置隔离软质塑料部分的型腔；当硬质塑料注射完成以后，封刀片下降到下限位置，软质和硬质塑料的型腔连通，另一个机头注射软质塑料。制品的硬质塑料部分采用热流道顺序注射方式减少了熔接痕等缺陷；软质塑料部分采用潜伏式浇口以自动脱料。实际生产证明，该模具生产的产品合格率增加，外观质量满足要求，硬质塑料和软质塑料结合处符合客户要求。
침대전통적쌍색주소모구척촌대、결구복잡、대주소궤척촌요구고병차산품합격솔불고등결점，이기차적통풍개판위례설계료일충신형적봉도편식쌍색주소모구。봉도편채용양병결구，당주사경질소료시，봉도편처우상한위치격리연질소료부분적형강；당경질소료주사완성이후，봉도편하강도하한위치，연질화경질소료적형강련통，령일개궤두주사연질소료。제품적경질소료부분채용열류도순서주사방식감소료용접흔등결함；연질소료부분채용잠복식요구이자동탈료。실제생산증명，해모구생산적산품합격솔증가，외관질량만족요구，경질소료화연질소료결합처부합객호요구。
According to defects of that the traditional double-color injection mold is large in size,complex in structure,strict in the size of injection molding machine and has low qualified rate of products,a new sealing blade type double-color injection mold was designed by taking a car ventilation cover plate as object. The structure of the blade is insert structure,and when hard plastic is injected,the blade locates the upper limit position for insulating the cavity of soft plastic,when the injection of hard plastic is completed,the blade descends to the lower limit position for connecting the cavities of soft plastic and hard plastic,then the soft plastic is injected through another injector nozzle. Hot runner injection molding in sequence is adopted in the gating system of hard plastic which reduces weld marks. Submarine gate is adopted in the gating system of soft plastic for auto-stripping. The qualified rate of products produced by the mold increases through practical producing test meet customers’requirements in the appearance of the products and especially in the junction of soft and hard plastic.