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洗發(fā)水瓶蓋塑料成型工藝及模具設(shè)計
摘要:本設(shè)計題目為洗發(fā)水瓶蓋注塑模設(shè)計,體現(xiàn)了蓋類零件的設(shè)計要求、內(nèi)容及方向,有一定的設(shè)計意義。通過對該零件模具的設(shè)計,進一步加強了設(shè)計者注塑模的基礎(chǔ)知識,為設(shè)計更復雜的注塑模具做好了鋪墊并吸取了更深刻的經(jīng)驗。
本設(shè)計運用塑料成型工藝及模具設(shè)計的基礎(chǔ)知識,首先分析了塑件的成分及性能要求,為選取澆口的類型做好了準備;然后估算了塑件的體積,便于選取注塑機及確定型腔數(shù)目;最后分析了塑件的特征,確定模具的設(shè)計參數(shù),設(shè)計要點,及推出裝置的選取。
通過分析洗發(fā)水瓶蓋的工藝性,可知工件分型比較復雜,塑件采用順序脫模法進行脫模分型。由于瓶蓋的結(jié)構(gòu)比較復雜,所以采用點澆口澆注系統(tǒng),脫模后不在修正澆口的痕跡。但采用這種澆口時,常常要在模具上增加一個分型面,以便澆口凝料脫模。
關(guān)鍵詞:工藝分析 塑件成型 澆注系統(tǒng) 模具結(jié)構(gòu)
THE PLASTIC –FORMING AND MOLD DESIGN PROCESS OF SCREW CAP PARTS
Abstract: This design topic covers the note mold design for the thread, manifested has covered kind of components the design request, the content and the direction, had certain design significance.Through to this components mold design, further strengthened the designer to pour the mold the elementary knowledge, for designed the more complex injection molding mold to complete the upholstery to absorb a more profound experience.
Through the foundation knowledge, firstly, the composion and the perfourmance of thr part is analyzed to choose the type of the gat advantagely. Secondly, the volume of the part is estimated to choose the injection molding machine and to detemine the mould quantity conveniencely. Lastly the character of the part is analyzed to determine the mould design parameter and design point and choose the ejection assembly.
Through the analysis interrupted box thread bottle cap technology capability, may know the box thread is the semicircle thread, the models to use pulls out the core organization to carry on the drawing of patterns,Because bottle cap's on part request is strict, therefore uses the runner gating system, after the drawing of patterns, not in revision runner trace. But when uses this kind of runner, must increase a profile frequently on the mold, so that the runner can congeal the material drawing of patterns.
Keywords: process analysis; plastic parts moulding; casting system; molding structure.