注射模具外文翻譯---注射模具的介紹

1、<p><b>　　注射模具的介紹</b></p><p><b>　　1.模具基本知識(shí)</b></p><p>　　1.1引言     </p><p>　　我們?nèi)粘Ｉa(chǎn)、生活中所使用到的各種工具和產(chǎn)品，大到機(jī)床的底座、機(jī)身外殼，小到一個(gè)胚頭螺絲、紐扣以及各種家用電器的外殼，無(wú)不與模具有著密

2、切的關(guān)系。模具的形狀決定著這些產(chǎn)品的外形，模具的加工質(zhì)量與精度也就決定著這些產(chǎn)品的質(zhì)量。因?yàn)楦鞣N產(chǎn)品的材質(zhì)、外觀、規(guī)格及用途的不同，模具分為了鑄造模、鍛造模、壓鑄模、沖壓模等非射膠模具，以及射膠模具。近年來(lái)，隨著射料工業(yè)的飛速發(fā)展和通用與工程射料在強(qiáng)度和精度等方面的不斷提高，射料制品的應(yīng)用范圍也在不斷擴(kuò)大，如：家用電器、儀器儀表，建筑器材，汽車工業(yè)、日用五金等眾多領(lǐng)域，射料制品所占的比例正迅猛增加。一個(gè)設(shè)計(jì)合理的射料件往往能代替多個(gè)傳統(tǒng)

3、金屬件。工業(yè)產(chǎn)品和日用產(chǎn)品射料化的趨勢(shì)不斷上升。</p><p>　　1.2 模具的一般定義</p><p>　　在工業(yè)生產(chǎn)中，用各種壓力機(jī)和裝在壓力機(jī)上的專用工具，通過(guò)壓力把金屬或非金屬材料制出所需形狀的零件或制品，這種專用工具統(tǒng)稱為模具。</p><p>　　1.3 模具的一般分類</p><p>　　可分為射膠模具及非射膠模具：（1）非

4、射膠模具有：鑄造模、鍛造模、沖壓模、壓鑄模等。 A．鑄造?！堫^、生鐵平臺(tái)  B．鍛造?！嚿?   C．沖壓?！?jì)算機(jī)面板    D．壓鑄?！辖穑左w （2）射膠模具根據(jù)生產(chǎn)工藝和生產(chǎn)產(chǎn)品的不同又分為：A．注射成型?！娨暀C(jī)外殼、鍵盤(pán)按鈕（應(yīng)用最普遍） B．吹氣?！嬃掀?  C．壓縮成型?！娔鹃_(kāi)關(guān)、科學(xué)瓷碗碟  D．轉(zhuǎn)移成型?！?/p>

5、電路制品  E．?dāng)D壓成型?！z水管、射膠袋  F．熱成型?！该鞒尚桶b外殼   G．旋轉(zhuǎn)成型模——軟膠洋娃娃玩具  </p><p>　　注射成型是射料加工中最普遍采用的方法。該方法適用于全部熱射性射料和部分熱固性射料，制得的射料制品數(shù)量之大是其它成型方法望塵莫及的，作為注射成型加工的主要工具之一的注射模具，在質(zhì)量精度、制造周期以及注射成型過(guò)程中的生產(chǎn)效率等方面水平高

6、低，直接影響產(chǎn)品的質(zhì)量、產(chǎn)量、成本及產(chǎn)品的更新，同時(shí)也決定著企業(yè)在市場(chǎng)競(jìng)爭(zhēng)中的反應(yīng)能力和速度。  注射模具是由若干塊鋼板配合各種零件組成的，基本分為： A 成型裝置（凹模，凸模） B 定位裝置（導(dǎo)柱，導(dǎo)套）  C 固定裝置（工字板，碼模坑）  D 冷卻系統(tǒng)（運(yùn)水孔）  E 恒溫系統(tǒng)（加熱管，發(fā)熱線） F 流道系統(tǒng)（唧咀孔，流道槽，流道孔） G 頂出系統(tǒng)（頂針，頂棍）</p><

7、p><b>　　1.4 模具的類型</b></p><p>　　根據(jù)澆注系統(tǒng)型制的不同可將模具分為三類:（1）大水口模具：流道及澆口在分模線上，與產(chǎn)品在開(kāi)模時(shí)一起脫模，設(shè)計(jì)最簡(jiǎn)單，容易加工，成本較低，所以較多人采用大水口系統(tǒng)作業(yè)。（2）細(xì)水口模具：流道及澆口不在分模線上，一般直接在產(chǎn)品上，所以要設(shè)計(jì)多一組水口分模線，設(shè)計(jì)較為復(fù)雜，加工較困難，一般要視產(chǎn)品要求而選用細(xì)水口系統(tǒng)。（3）熱流

8、道模具：主要由熱澆口套，熱澆道板，溫控電箱構(gòu)成。熱流道模具是在一個(gè)半模有流道加熱系統(tǒng)的兩板式模具。熱流道系統(tǒng)分成兩個(gè)部分：分流板和噴嘴。分流板的通道將射料傳送到一個(gè)和分型線平行平面，這個(gè)平面在型腔的上面。噴嘴垂直于分流板安裝，把射料從分流板送進(jìn)行腔。熱流道系統(tǒng)的優(yōu)勢(shì):（1）無(wú)水口料，不需要后加工，使整個(gè)成型過(guò)程完全自動(dòng)化，節(jié)省工作時(shí)間，提高工作效率。（2）壓力損耗小。</p><p><b>　　2．注

9、射模</b></p><p>　　設(shè)計(jì)模具有很多的規(guī)則。這些規(guī)則和標(biāo)準(zhǔn)的做法，都是基于邏輯，過(guò)往的經(jīng)驗(yàn)，方便性，經(jīng)濟(jì)性。設(shè)計(jì)，模具制造，和成型，它通常的優(yōu)勢(shì)就是遵循規(guī)則。但有時(shí)候，它可能會(huì)做出更好的，如果一項(xiàng)方法是被忽視和另一種方法被選擇。在一些書(shū)中,最普通的規(guī)則都會(huì)一一列出,而設(shè)計(jì)者設(shè)計(jì)的東西也僅僅是跟著以往的經(jīng)驗(yàn)走而已。設(shè)計(jì)者應(yīng)該研究出新的想法和方法,來(lái)進(jìn)行新的成型和選擇模具材料。</p&g

10、t;<p>　　注射工藝過(guò)程就是從給料斗送進(jìn)粉狀或粒狀的射料混合物，經(jīng)過(guò)定量區(qū)和熔化區(qū)，然后將其注射到模具型腔中。注射過(guò)程說(shuō)明：模具是一種生產(chǎn)射料制品的工具。它由幾組零件部分構(gòu)成，這個(gè)組合內(nèi)有成型模腔。注射時(shí)，模具裝夾在注射機(jī)上，熔融射料被注入成型模腔內(nèi)，并在腔內(nèi)冷卻定型，然后上下模分開(kāi)，經(jīng)由頂出系統(tǒng)將制品從模腔頂出離開(kāi)模具，最后模具再閉合進(jìn)行下一次注射，整個(gè)注射過(guò)程是循環(huán)進(jìn)行的。</p><p>

11、　　注射模至少是由裝在注射機(jī)的兩個(gè)壓板上的兩部分組成，以便可以開(kāi)模和合模。在合模的時(shí)候,模具的兩半部分形成的產(chǎn)品成型表面是由射料熔體通過(guò)澆口和熱流道系統(tǒng)注入模具型腔形成的。模具中冷卻的原則是產(chǎn)品要在模具中冷卻和凝固,以便隨后可以脫模。</p><p>　　隨著產(chǎn)品注射的完成,模具就必須開(kāi)模。產(chǎn)品的形狀決定著它是否由模具兩部份簡(jiǎn)單地開(kāi)模或由有側(cè)向分型來(lái)開(kāi)模。模具的設(shè)計(jì)是由產(chǎn)品的形狀和產(chǎn)品開(kāi)模的方式?jīng)Q定的。注射成型的

12、產(chǎn)品可以分為以下幾類:</p><p><b>　　無(wú)側(cè)抽芯的產(chǎn)品；</b></p><p>　　有側(cè)向開(kāi)口的外側(cè)抽芯的產(chǎn)品；</p><p><b>　　有內(nèi)側(cè)抽芯的產(chǎn)品；</b></p><p>　　有外側(cè)抽芯和內(nèi)側(cè)抽芯的產(chǎn)品。</p><p><b>　　3．

13、注射模具的組成</b></p><p><b>　　3.1 型腔空間</b></p><p>　　型腔空間是在模具中的一個(gè)形狀,當(dāng)注射的材料充滿這個(gè)空間的時(shí)候,它就會(huì)呈現(xiàn)出和型腔空間一樣的形狀。在注射成型時(shí),射料是通過(guò)很高的壓力注射入型腔空間的,所以模具必須要足夠的堅(jiān)固來(lái)抵抗注射的壓力,以防變形。</p><p><b>

14、　　3.2 型腔的數(shù)量</b></p><p>　　許多的模具，特別是較大產(chǎn)品的模具，僅僅只有一個(gè)模具型腔，但是也有許多的模具，特別是比較大型的模具，都會(huì)有2個(gè)或更多的型。究其原因就是它純粹的經(jīng)濟(jì)性。它僅僅是注入多個(gè)型腔比注入一個(gè)型腔多花了一點(diǎn)的時(shí)間。今天,大多數(shù)的模具型腔數(shù)量都是以這些數(shù)字為參考的: 2,4,6,8,12,16,24,32,48,64,96,128。選擇這些數(shù)字（偶數(shù)）的原因是為了在

15、長(zhǎng)方形區(qū)域內(nèi)布置型腔方便，這樣就有利于設(shè)計(jì)、定尺寸、加工制造和圍繞機(jī)器中心對(duì)稱，這種對(duì)稱分布對(duì)于保證每個(gè)型腔分配到相同的鎖模力非常重要。</p><p><b>　　3.3 型腔和型芯</b></p><p>　　按照習(xí)慣，腔空間的中空部分稱為型腔。與型腔空間所匹配的部分稱為型芯。 大部分射膠制品是杯形的。 但這并不意味著它們看起來(lái)就像是一個(gè)杯，只是它們有一個(gè)內(nèi)部和外

16、部。產(chǎn)品的外部是由型腔形成的,而內(nèi)部是有由型芯形成的。通常情況下,型腔是位于注射一邊的那半模具上,而型芯是位于可以移動(dòng)的那半模具上的。這樣安排的原因是注射機(jī)上的移動(dòng)板有一個(gè)彈射裝置,而產(chǎn)品是收縮和包緊在型芯上的,然后產(chǎn)品就可以通過(guò)此來(lái)彈射出來(lái)。大部分的注射機(jī)在注射的一邊都不會(huì)安裝彈射裝置。</p><p>　　對(duì)于模具包含復(fù)雜型腔和多型腔模具，試圖象整體模具那樣在一塊鋼板加工型腔和型芯是不讓人滿意的。型腔和型芯分

17、別決定著成型的外部和內(nèi)部的形狀,而它們的整體決定著整個(gè)成型的方式。</p><p><b>　　3.4 分模線</b></p><p>　　為了能夠生產(chǎn)出一個(gè)模具,我們必需具備有兩個(gè)分半的模具,一半裝型腔一半裝型芯。這兩個(gè)板分離時(shí)的部分叫做分模線,簡(jiǎn)稱P/L。其實(shí),這是一個(gè)分離的區(qū)域或面,但是為了方便,我們習(xí)慣叫它成一條線。 模具的分型面是兩模板接近型腔的那些部分，它

18、們對(duì)接一起形成油封并且避免型腔里射性材料的損失。分模線可以是任何形狀的, 許多的注射成型都是要求分模線是不在同一平面或是曲面的,但是為了便于模具制造,最好設(shè)計(jì)在同一個(gè)平面上。為了能夠在模具上脫出產(chǎn)品,分模線總是在分布在產(chǎn)品最寬的圓周區(qū)域。對(duì)一些形狀來(lái)說(shuō)，設(shè)置分模線或其角度是非常有必要的，但是在任何情況下，都要有目的地讓它容易加工，以確保當(dāng)注射的時(shí)候模具能夠緊緊地合在一起。如果分模線設(shè)計(jì)不好,射料將會(huì)溢出來(lái),那樣產(chǎn)品就會(huì)有一個(gè)非常大的凹陷

19、,那樣的產(chǎn)品肯定會(huì)被拆除,否則那樣的產(chǎn)品是不能夠使用的。甚至更危險(xiǎn)的是,射料噴射進(jìn)模具的時(shí)候,它會(huì)飛濺出傷害到人本身。</p><p><b>　　3.5 流道和澆口</b></p><p>　　現(xiàn)在,增加介紹的是把射料從外面帶到型腔空間的裝置。在射料冷卻之前(也就是射料冷卻后不能在流動(dòng)之前),它必需有足夠的壓力以便使射料能夠充滿型腔。流動(dòng)的通道就是流道,它把注射機(jī)的

20、噴嘴和模具連接了起來(lái),流道是一個(gè)獨(dú)立的型腔, 流道本身要光滑,以便可以阻止射料自由流動(dòng)。同時(shí), 型腔被充滿后，澆口處先凝固，注射機(jī)螺桿抽回時(shí)可防止成型中的回流。澆口是一個(gè)小型的開(kāi)口,它引導(dǎo)著流道到型腔空間。澆口是一個(gè)渠道,是連接與流道相通的小口。與其他的進(jìn)料系統(tǒng)相比,它有一個(gè)很小的橫截面積。在射料充滿型腔后,澆口很快就會(huì)冷卻,注射的噴嘴往后退,在模具退后的時(shí)候射料還是留有在噴嘴中的。</p><p>　　4. 注

21、射機(jī)的工作過(guò)程</p><p>　　注射模具是安裝在注射機(jī)上的，它的注射成型過(guò)程是由注射機(jī)來(lái)完成的。以下是注射機(jī)的工作過(guò)程：注射成型機(jī)通過(guò)抽真空把射料原料從干燥機(jī)吸到料斗里面。料斗實(shí)際上是一個(gè)小的漏斗，它被安裝在機(jī)臺(tái)料筒的后面。開(kāi)始起實(shí)際作用的地方是料筒，料筒實(shí)質(zhì)上是四周都是加熱器的一個(gè)很大的螺桿安放室，它把原料送向模具。隨著螺桿的旋轉(zhuǎn)，原料在料筒里前進(jìn)并成為熔融狀態(tài)。只有完全熔融后，原料才會(huì)在螺桿高速旋轉(zhuǎn)產(chǎn)生的

22、擠壓力下射進(jìn)模腔。當(dāng)螺桿前端壓室注滿射料時(shí)，螺桿被迫后退，斷開(kāi)限位開(kāi)關(guān)而開(kāi)動(dòng)液壓缸，從而向前推動(dòng)螺桿，將熔融射料注射到閉合的模具型腔中。型腔被充滿后，澆口處先凝固，注射機(jī)螺桿抽回時(shí)可防止成型中的回流。螺桿端部稱為噴嘴，從這里開(kāi)始直到模具型腔這段空間內(nèi)，熔融材料沒(méi)有被加熱，并且一直處于被冷卻的狀態(tài)。流道水口料就是在噴嘴到模腔之間冷卻固化的射料，屬于工藝廢料。實(shí)際上，在噴嘴到模腔之間的冷卻射料是“主流道”，但它和流道是連在一塊的。有一些關(guān)于

23、處理水口料的方法，但這不是我們這里要討論的。大多數(shù)人以前都見(jiàn)過(guò)流道，但卻沒(méi)有認(rèn)出。最容易見(jiàn)到他們的地方是由單獨(dú)零件構(gòu)成的飛機(jī)和汽車模型上，在這些零件上面一般都附著著流道系統(tǒng)。一般地</p><p>　　盡管塑料一旦被加熱就會(huì)發(fā)生降解，而且有些成型工藝不允許碎材混入原材料里面，因?yàn)檫@樣會(huì)導(dǎo)致成品的缺陷。這種情況下水口料可以用到其他地方或者干脆不用。收縮在成型中影響深遠(yuǎn)，大部分塑料冷卻后會(huì)收縮20%。為了在重點(diǎn)（關(guān)鍵

24、）塑料零件上--當(dāng)然不只是玩具---克服這種現(xiàn)象，模具設(shè)計(jì)者必須把這個(gè)要素考慮到設(shè)計(jì)里面去，那樣成型出來(lái)的產(chǎn)品才能滿足設(shè)計(jì)規(guī)格。 頂針是模具本身的零件，用來(lái)在模具打開(kāi)的時(shí)候頂出產(chǎn)品。整個(gè)過(guò)程都有注射成型機(jī)控制。一個(gè)成型周期實(shí)際上就是合模--注射--開(kāi)模--頂出。模具被鎖緊在機(jī)臺(tái)上，前模固定不動(dòng)（在機(jī)臺(tái)的料筒側(cè)），后模則可以移動(dòng)。上面說(shuō)的頂針就是后模側(cè)。當(dāng)模具打開(kāi)，產(chǎn)品吸附在后模側(cè)以被頂出。</p><p>　　以

25、上就是關(guān)于注射模具的相關(guān)介紹。</p><p>　　The introdution of the Injection Mold </p><p>　　1. Mold basic knowledge</p><p>　　1.1 Introduction </p><p>　　There is a close relationship with

26、 all kinds of mold,which are refered to our daily production, and life in the use of the various tools and products, the large base of the machine tool, the body shell, the first embryo to a small screws, buttons, as wel

27、l as various home appliances shell. Mold’s shape determine the shape of these products, mold’s precision and machining quality determine the quality of these products,too. Because of a variety of products, appearance, sp

28、ecifications and the diffe</p><p>　　1.2 Mold general definition</p><p>　　In the industrial production，with the various press and the special instruments which installed in the press,it produces

29、the required shape parts or products through pressure on the metal or non-metallic materials, this special instruments collectively call as the mold.</p><p>　　1.3 Mold general classification</p><p

30、>　　Mold can be divided into plastic and non - plastic mould: (1) Non-plastic mould: Die Casting, forging Die, Die, die-casting mould and so on. A. Die Casting - taps, pig iron platformB. Forging Die - car body C. Die

31、- computer panel D. Die Casting Die - superalloy, cylinder body (2) For the production technology and production, the plastic mold are divided into different products: A. Injection molding die - TV casing, keyboard butto

32、n (the most common application) B. Inflatable module - drink bottl</p><p>　　1.4 Type of mold</p><p>　　It can be divided into three categories according to gating system with the different type o

33、f mold :(1) intake die: Runner and gate at the partig line,it will strip together with products when in the open mode,it is the most simple of design, easy processing and lower costing.So more people operations by using

34、large intake system. (2) small inlet die:It general stay in the products directly,but runner and gate are not at the partig line.Therefore,it should be design a multi-outlet parting line.A</p><p>　　2、Injecti

35、on Mold</p><p>　　There are many rules for designing molds.These rules and standard practices are based on logic,past experience,convenience,and economy.For designing,mold making,and molding,it is usually of

36、advantage to follow the rules.But occasionally,it may work out better if a rule is ignored and an alternative way is selected.In some texts,the most common rules are noted,but the designer will learn only from experience

37、 which way to go.The designer must ever be open to new ideas and methods,to new molding an</p><p>　　An injection mold consists of at least two halves that are fastened to the two platens of the injection mol

38、ding machine so that can be opened and closed.In the closed position,the product-forming surfaces of the two mold halves define the mold cavity into which the plastic melt is injected via the runner system and the gate.C

39、ooling provisions in the mold provide for cooling and solidification of the molded product so that it can be subsequently ejected.</p><p>　　For product ejection to occur,the mold must open.The shape of the

40、molded product determines whether it can be ejected simply by opening the two mold halves or whether undercuts must be present.The design of a mold is dictated primarily by the shape of the product to be molded and the p

41、rovisions necessary for product ejection.Injection-molded products can be classified as:</p><p>　　1).Products without undercuts.</p><p>　　2).products with external undercuts of lateral openings.

42、</p><p>　　3).products with internal undercuts.</p><p>　　4).products with external and internal undercuts.</p><p>　　3.The composition of injection mold</p><p>　　3.1 Mold

43、 Cavity Space</p><p>　　The mold cavity space is a shape inside the mold,when the molding material is forced into this space it will take on the shape of the cavity space.In injection molding the plastic is i

44、njected into the cavity space with high pressure,so the mold must be strong enough to resist the injection pressure without deforming.</p><p>　　3.2 Number of Cavities</p><p>　　Many molds,particu

45、larly molds for larger products,ate built for only 1 cavity space,but many molds,especially large production molds,are built with 2 or more cavities.The reason for this is purely economical.It takes only little more time

46、 to inject several cavities than to inject one.Today,most multicavity molds are built with a preferred number ofcavities:2,4,6,8,12,16,24,32,48,64,96,128.These numbers are selected because the cavities can be easily arr

47、anged in a rectangular pattern,which is ea</p><p>　　3.3 Cavity and Core</p><p>　　By convention,the hollow portion of the cavity space is called the cavity.The matching,often raised portion of th

48、e cavity space is called the core.Most plastic products are cup-shaped.This does not mean that they look like a cup,but they do have an inside and an outside.The outside of the product is formed by the cavity, the inside

49、 by the core.Usually,the cavities are placed in the mold half that is mounted on the injection side,while the cores are placed in the moving half of the mold.The reaso</p><p>　　For moulds containing intricat

50、e impressions,and for multi-impression moulds, it is not satisfactory to attempt to machine the cavity and core plates from single blocks of steel as with integer moulds. The cavity and core give the molding its external

51、 and internal shapes respectively, the impression imparting the whole of the form to the molding.</p><p>　　3.4 The Parting Line</p><p>　　To be able to produce a mold,we must have ta least two se

52、parate mold halves,with the cavity in one side and the core in the other.The separation between these plates is called the parting line,and designated P/L.Actually,this is a parting area or plane,but,by cinvention,in thi

53、s intext it is referred to as a line. The parting surfaces of a mould are those portion of both mould plates, adjacent to the impressions, which butt together to form a seal and prevent the loss of plastic material from

54、the</p><p>　　3.5 Runners and Gates</p><p>　　Now,we must add provisions for bringing the plastic into these cavity spaces.This must be done with enough pressure so that the cavity spaces are fill

55、ed completely before the plastic "freezes"(that is,cools so much that the plastic cannot flow anymore).The flow passages are the sprue,from wherethe machine nozzle contactss the mold,the runners,which distribut

56、e the plastic to the individual cavities, the wall of the runner channel must be smooth to prevent any restriction to flow. Also, as the run</p><p>　　4. The injection molding machine process</p><p

57、>　　Injection Mold is installed in the injection molding machine, and its injection molding process is completed by the injection molding machine. Following is the injection molding machine process.The molding machine

58、uses a vacuum to move the plastic from the dryer to it's initial holding chamber. This chamber is actually a small hopper on the back of the "barrel" of the machine。 The barrel is where all the real work is

59、 done and it's essentially a large screw housed in a heater which moves the plas</p><p>　　Though, once plastic has been heated, it degrades a bit and some molding processes will not allow for "regri

60、nd" to be mixed back in with virgin material as it can cause problems with the final part. In cases like this the regrind is used elsewhere or it is discarded completely. Shrinkage plays a crucial role in molding an

61、d most plastic shrinks 20% as it cools. In order to combat this phenomenon in critical plastic pieces (not really toys) it is up the mold designer to build this factor into his </p><p>　　These are related to