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茶杯蓋的注塑模設計
摘 要:本設計題目為茶杯蓋的注塑模設計，體現(xiàn)了圓蓋形零件的設計要求、內(nèi)容、方向。通過對該模具的設計，進一步加強了設計者對注塑模各方面知識的擴展和運用，從中學到更多知識，為設計復雜模具打下基礎。
本設計根據(jù)工件的具體形狀及外觀，分析材料的使用性能及成型性能，再選取合適的分型面、澆口、注塑機及模具結構。然后根據(jù)模具的具體特征，確定其具體尺寸。
本模具采用三板式。脫模時，先將凝料脫出，再由中間板使其與塑件分離。本模具設有型環(huán) , 當模具在冷卻水的循環(huán)作用下冷卻后，塑件變硬。在動模后退過程中，型環(huán)將塑件從模具中頂出，最后由彈簧復位。這種機構脫?？煽?，設計方便且在模具中占用空間較小，非常適合在該模具中使用。
關鍵詞：注塑模、形狀、三板式、型環(huán)。
tea-cup top plastic injecting mold design
Abstract：The subject is the design of the tea-cup top plastic injecting mold, Which embodies the requirement content and direction of the design for round top plastic parts .By means of the mold design , the knowledge in all fields is spreaded and used . And the basic structure of plastic mold more comprehended .
According to the shape and appearance of the work , the designer analyzes the applying function and shaping function of plastic .And he chooses the apposite parting surface , the sprue , the injection –molding machine and the structure of mold . Then according to specific feature of the mold , the designer determines the specific size .
This is a three-plate mold . Since the mold is cooled by circulating cold water , the plastic hardens and the part may be ejected when the plunger draws back and the mold opens . The runner system which has been solidified is shaked off by the middle plate . This mold has two templates . The work will be ejected by the templates , when the moving die is falling back . And it is reseted by springs at last . Lastly the character of the part is analyzed to determine the mould design parameter and design point and choose the ejection assembly.
Keywords: injecting mold； shape； three-plate；templates