機(jī)械模具專業(yè)本科畢業(yè)設(shè)計(jì)外文翻譯-注塑機(jī)-免費(fèi)閱讀
【正文】 對(duì)于內(nèi)部不帶有其他形狀的塑件，例如，實(shí)芯矩形件，塑件的收縮作用使其脫離型腔壁，因此，可以采用簡(jiǎn)單的脫模方式（推出塑件）。推出支架通常由定模座板和幾塊支撐塊組成，支撐塊安裝在動(dòng)模座板上，且便于加工成型。 推出機(jī)構(gòu) 塑料熔體在壓力作用下進(jìn)過(guò)澆注系統(tǒng)進(jìn)入模具型腔形成塑件，因此（塑件成型后）必須手動(dòng)取出。 、分流道 分流道是引導(dǎo)熔體塑料進(jìn)入模具型腔的通道。這些術(shù)語(yǔ)應(yīng)用在相應(yīng)的進(jìn)料通道本身，以及取出塑料時(shí)從進(jìn)料通道中一同取出的澆注系統(tǒng)凝料。浮動(dòng)型腔板移動(dòng)預(yù)定距離后，被限位釘限位。彈簧的彈力必須足夠大，確保在初始推力的作用下浮動(dòng)型腔板跟隨動(dòng)模部分一起運(yùn)動(dòng)。導(dǎo)套分別安裝在動(dòng)模板和浮動(dòng)型腔板上。熱塑性塑料熔體必須在模具內(nèi)冷卻成型，以保證推出時(shí)不發(fā)生變形，這種熱固性循環(huán)速度很快。當(dāng)熔體充滿螺桿前部區(qū)域時(shí)，螺桿在熔體壓力的作用下后退，觸動(dòng)限位開(kāi)關(guān)使液壓缸工作，在液壓力的作用下推動(dòng)螺桿向前運(yùn)動(dòng)，將熔融塑料注射到閉合的模具型腔中。注塑成型的工藝包括：首先把料斗中的粉狀或粒狀的塑料混合物依次輸送發(fā)哦計(jì)量區(qū)和溶化區(qū)，然后再注射到模具的型腔中，經(jīng)過(guò)短時(shí)冷卻后，開(kāi)模，推出成型塑件，注塑機(jī)分為手動(dòng)、半自動(dòng)及全自動(dòng)操作。 本科畢業(yè)設(shè)計(jì)（論文） 外文翻譯 題 目 電風(fēng)扇上蓋注塑成型模具設(shè)計(jì) 學(xué) 院 機(jī)電工程學(xué)院 專 業(yè) 機(jī)械工程及自動(dòng)化 班 級(jí) 05 機(jī)自本一 學(xué) 號(hào) 學(xué)生姓名 指導(dǎo)教師 溫州大學(xué)教務(wù)處制 外文資料來(lái)源及題目 模具專業(yè)英語(yǔ)，王浩鋼等主編，人民郵電出版社 譯成中文后題目 （譯文附后） 注塑模具 指導(dǎo)教師審閱意見(jiàn)： 簽名： 年 月 日 The Injection Molding The injection molding Injection molding is principally used for the production of the thermoplastic parts,although some progress has been made in developing a method for injection molding some thermosetting problem of injection a method plastic into a mold cavity from a reservoir of melted material has been extremely difficult to solve for thermosetting plastic which cure and harden under such conditions within a few principle of injection molding is quite similar to that of process consists of feeding a plastic pound in powered or granular form from a hopper through metering and melting stages and then injecting it into a a brief cooling period,the mold is opened and the solidified part machine advantage of injection molding are：（ ⅰ ） a high molding speed adapter for mass production is possible；（ ⅱ ） there is a wide choice of thermoplastic materials providing a variety of useful properties；（ ⅲ ） it is possible to mold threads,undercuts,side holes,and large thin section. The injectionmolding machine Several methods are used to force or inject the melted plastic into the most monly used system in the larger machines is the inline reciprocating screw,as shown in Figure screw acts as a bination injection and plasticizing the plastic is fed to the rotating screw,it passes through three zones as shown：feed,pression,and the feed zone,the screwflight depth is gradually reduced,force the plastic to work is converted to heat by conduction from the barrel the chamber in front of the screw bees filled,it forces the screw back,tripping a limit switch that activates a hydraulic cylinder that forces the screw forward and injects the fluid plastic into the closed antiflowback valve presents plastic under pressure from escaping back into the screw flight. The clamping force that a machine is capable of exerting is part of the size designation and is measured in ruleofthumb can be used to determine the tonnage required for a particular is based on two tons of clamp force per square inch of projected the flow pattern is difficult and the parts are thin,this
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