【正文】
面應(yīng)該選擇在最大截面處,這樣有利于開(kāi)模取出塑件,而節(jié)流閥和外螺紋采用側(cè)向分型機(jī)構(gòu)成型。通過(guò)斜導(dǎo)柱與滑塊的斜孔相配合,帶動(dòng)滑塊向外運(yùn)動(dòng),從而使得側(cè)抽芯從模具型腔中脫離出來(lái),從而達(dá)到抽芯的目的。抽芯機(jī)構(gòu)沒(méi)有標(biāo)準(zhǔn)件,所以這樣會(huì)影響到設(shè)計(jì)、加工、裝配的難度。在推出機(jī)構(gòu)工作時(shí),通過(guò)斜頂桿在斜孔里面所鎖定的位置向上滑動(dòng),從而使得側(cè)型芯有向上和向內(nèi)兩個(gè)分運(yùn)動(dòng),從而使得型芯從節(jié)流閥中脫離出來(lái)。推出機(jī)構(gòu)采用傳統(tǒng)的推件板機(jī)構(gòu)。兩個(gè)外抽芯機(jī)構(gòu)主要用來(lái)實(shí)現(xiàn)節(jié)流閥以及外螺紋的側(cè)向分型。其余的細(xì)節(jié),如:外螺紋等,尺寸沒(méi)有特殊要求,只要滿(mǎn)足一般要求即可。塑件的長(zhǎng)度方向?yàn)?0mm,最大外圓直徑為26mm。比如在設(shè)計(jì)中運(yùn)用了Pro/E進(jìn)行分模,從而極大的簡(jiǎn)化了模具型腔的設(shè)計(jì),提高了設(shè)計(jì)的效率。上部的側(cè)向抽芯主要來(lái)成型節(jié)流閥部分,而下部的側(cè)向抽芯成型外螺紋部分。從塑件的外形以及內(nèi)部結(jié)構(gòu)來(lái)看,需要上下兩次側(cè)向分型抽芯。在這套注射模具的設(shè)計(jì)中廣泛采用了先進(jìn)的模具CAD/CAE技術(shù)。關(guān)鍵詞 : 塑料模具設(shè)計(jì),側(cè)向分型分析,CAD/CAE,塑料顧問(wèn),Pro/E IAbstractThe main task of this graduation design is the design of the injection mould for medical drip device. From the plastic parts of the shape and internal structure, need two times side parting and core pulling. The upper part of the side core pulling is forming the throttle valve, and the lower part of the side core pulling and forming the outer threaded portion. From the requirements of plastic parts of the size and the product, the injection mould need high precision, it is also a difficult point of the design. From the design point of view, the threedimensional design involved, especially the application of 3D design in the mold design, the main difficulty lies in the threedimensional mold gate location and type, form, and finally the establishment of 3D assembly realization.The advanced mould CAD/CAE technology is widely used in the design of the injection mould. For example, in the design uses the Pro/E sub module, which greatly simplifies the design of the mould cavity, improves the design efficiency. And the use of Plastic Advisor in the design process, a simple analysis of the plastic parts of the cavity and runner and other important parts, the feasibility of the mold has a guiding role to a certain extent. In the design stage, using the Pro/E optimized, and the 3D assembly, the last generation of 2D part drawing, so the optimization to reduce a lot of work late.Keywords: plastic mold design, lateral type analysis, CAD/CAE, Plastic Advisor, Pro/E.第一章 任務(wù)分析第1章 任務(wù)分析本套塑料注射模具設(shè)計(jì)成型的塑件():塑件名稱(chēng):醫(yī)用滴液器塑件材質(zhì):PP(聚丙烯)塑件功能:與醫(yī)用輸液管相接,控制流速塑件尺寸及質(zhì)量要求:見(jiàn)塑件圖 塑件結(jié)構(gòu)分析通過(guò)初步對(duì)塑件的三維模型以及二維塑件圖的了解,該塑件屬于超薄件,所以在設(shè)計(jì)的精度控制上會(huì)有一定的壓力,結(jié)構(gòu)還是比較典型的。而塑件上會(huì)有一個(gè)長(zhǎng)細(xì)管(),如果通過(guò)常規(guī)的澆口形式,很難保證精度要求,這樣無(wú)疑也給模具的設(shè)計(jì)上帶來(lái)一定的難度。側(cè)向分型抽芯機(jī)構(gòu)主要分為兩種,一種是外抽,另一種是內(nèi)抽,而本塑件只需要外抽即可。 塑件澆口位置分析根據(jù)Moldflow的分析可以得到,模具需要采用三板模即可,但是最佳澆口位置不在主分型面上,且如果單純的采用點(diǎn)澆口的方式,巨大的注射壓力會(huì)將型芯沖歪,這樣就很難保證長(zhǎng)細(xì)管的精度,擬采用爪型澆口與點(diǎn)澆口結(jié)合的方式,這樣,塑件與澆注系統(tǒng)中的凝料在模具開(kāi)模過(guò)程中會(huì)自動(dòng)分離,塑件的后處理只要將爪型澆口與塑件分離即可。第2章 模具結(jié)構(gòu)形式的確定方案一:采用斜頂機(jī)構(gòu)進(jìn)行分型,該機(jī)構(gòu)主要由導(dǎo)滑槽、定位銷(xiāo)、斜頂桿、滑塊等零件組裝而成。如果使用斜頂機(jī)構(gòu),無(wú)論從零件的數(shù)量還是復(fù)雜程度,都會(huì)比較大。該方案由斜導(dǎo)柱、滑塊、楔緊塊、壓板等零件構(gòu)成。第二章 模具結(jié)構(gòu)形式的確定 斜導(dǎo)柱滑塊機(jī)構(gòu)常規(guī)機(jī)構(gòu)綜合考慮,采用方案二。第二