【正文】 section: Some injection machines have 據(jù)料頭的輕重來估計(jì)其行程,當(dāng)然也可以依據(jù)公式來計(jì)step5,step6 which are same as former molding speed andpressure this step should diminish and inject once ,如公式::不論成型什么產(chǎn)品, l injects usually tunnel material, Injection Volume can be estimated according to the weight of course 任何產(chǎn)品都不同程度的存在一個(gè)厚薄不一的問題,正常it can be calculated by formula: 情況下,較厚的部分都可能存在一個(gè)收縮凹陷的現(xiàn)象,為 了解決這種現(xiàn)象,就應(yīng)應(yīng)用到保壓,保壓一般來講都應(yīng)用L=Si=Vi/ 較慢的射速,而壓力的設(shè)置則應(yīng)看縮水的情況如何,小到25%,大到80%:注射行程。prevent this defect it should set holding pressure, The injection speed of holding pressure step is slow but holdingVi: injection volume of theoretical Ds: diameter of pressure setting within 2580% depending on sink :是Ω/ Technique: value ofΩ/,因?yàn)槿郛?dāng)然,如果我們?cè)诔尚蜁r(shí)每設(shè)定一個(gè)參數(shù)都要計(jì)算膠本身就是存在于把膠熔進(jìn)料筒的過程,如果原料粘度一次,熔膠壓力則大,但速度則應(yīng)取決于原料的分解溫度,熔膠速度越快,原料中的剪切力則會(huì)越大,料管溫度則越高,But it cost a lot of time to produce one product if every局部原料產(chǎn)生分解的可能性則會(huì)越大,故一般熔膠會(huì)采time molding parameter is setting by ,如45%75%,熔膠同時(shí)會(huì)碰到一個(gè)比較重要,當(dāng)然,根據(jù)產(chǎn)品特的環(huán)節(jié),那就是背壓的使用,產(chǎn)品精度要求越大,背壓的使殊需要,也允許成型不到2/3階段,比如避免結(jié)合線問題,用則更大,背壓可使原料分子間結(jié)構(gòu)更緊密,成型出的產(chǎn)這一階段的成型速度及壓力一般是整個(gè)成型段的最大值品則尺寸更穩(wěn)定,背壓太大,則會(huì)產(chǎn)生流涎,段,這一段的壓力一般也不會(huì)超過80%.速度側(cè)視Plastic should lower 3 steps, because plastic is a step 產(chǎn)品需變,可能大到95%也可,自然一般都是在55%80%to add melt resin material to cyclinder , Higher stick of material ,higher screw back speed differs depending on deposing temperature of resinStep 2 inject 2/3 of can lower 2/3 of material ,Higher screw speed ,Higher trim force of resin, product according to requirement of example higher cyclinder resin material may to prevent weld speed and pressure on this deposes so it set screw speed in midspeed such as 45step is the maximum of whole molding Mold suit 75%, In plastic step setting screw back pressure is very the injection molding machine and mold structure important, Higher screw back pressure ,higher quality of reasonable and eject air well, pressure of this step should product screw back pressure make resin structure order, lower 80%.Molding speed setting within 5580% but it Molding product is beautiful and volume ,it may setting 95% for especial flow if screw back pressure too all factors should be considered when using screw back ,其速度和壓力根據(jù)產(chǎn)品的需要,一般是小于第二段,速度和壓力存在于一個(gè)往,那就是松退,但同時(shí)又松退分前松退和后松退,設(shè)定值速度和壓力都在20%50%間,設(shè)定的行程一 般在25cm間,太長的行程可能會(huì)使料筒里面貯存空氣,Step3 inject remain 1/3 of to molding speed and pressure lower than that ofstep2 To prevent flash speed and pressure should decreaseIn plastic step sucking back is very important it can’t shot back include front sucking back and back suckingback It setting sucking back to prevent flow and sets:一般有機(jī)臺(tái)還有第五,第六段,這段的成型sucking back speed and pressure within 2050% and 速度和壓力相同前, within long distance make cyclinder reserve air and cause bubble at next ,周期時(shí)間是越短越好,周頂出的工藝設(shè)定 期時(shí)間又包括如下幾項(xiàng):射膠時(shí)間,保壓時(shí)間,熔膠時(shí)間,冷 卻時(shí)間,頂出時(shí)間,鎖模低壓時(shí)間,甚至乎關(guān)系到時(shí)間因素knocking out technique setting 的還有還開模與鎖模,開?；綜ycle time should shorter on condition that product ,開模quality time includes: injection time , holding 完成后, time, plastic time, cure time, knocking out time and mold protect mold opening closing sopeedThere is a mold opening step after product cooling and knocking out speed affect opening is a reverse step of mold last step of mold opening speed set ,一般看起來,射膠時(shí)間越Product should be knocked out after mold ,產(chǎn)品越飽和,但我們?cè)谥v求質(zhì)量時(shí),同時(shí)也須考慮產(chǎn)能, 更何況,射膠時(shí)間過長,有可能會(huì)造成產(chǎn)品過于飽滿而尋: 致粘模頂?shù)淖冃螀沾缙蟮纫幌盗袉栴},故我們?cè)谠O(shè)置射膠時(shí)間時(shí)應(yīng)綜合考慮,盡量在合乎質(zhì)量要求時(shí)縮短射Knocking out,第一階可分為中壓慢速,即是Injection time consists holding pressure 把產(chǎn)品輕輕頂出一部分,然后是中壓中速頂,中壓中速一injection time, fuller product, we should consider 般指的是35%55%,而低速則有可能低到5%,這需視產(chǎn)production quantity when we suit for injection 品不同而言,頂出行程設(shè)定是頂出長度稍比產(chǎn)品垂直深time too long, it may cause a series of defects suck as flash all sorts of factors should be considered, injection time should be shout if quality suit for out includes two steps, Step1 section settingmidspeed, knocks product out partly step2 section setting,背壓midpressure and on different 設(shè)定的大小,但有一點(diǎn),熔膠時(shí)間控制的長短一定要比冷product, midpressure and midspeed sets within 3555% lowspeed can set 5%.Distance of knocking out longer 12cm than the vertical thickness of time depends on plastic speed and screw back pressure, but plastic time must shorter than cure :冷卻時(shí)間的長短直接影響到成型的周期,Back冷卻時(shí)間越長,成型時(shí)間就越長,造成產(chǎn)能就越低,故我們?cè)谠O(shè)定高壓冷卻時(shí)間時(shí),只要能保證到產(chǎn)品成型順利,不頂退包括兩個(gè)過程與頂落的過程基本一致,頂退的會(huì)直接影響到變形等問題, time: Cure time affects molding The same as knocking out, ejector back includes 2cure time, longer molding cycle, lower production protect the ejector oil jar, it should make a 13mmSo it sets cure time short on condition that product molding distance in the ending point of ejector and can’t deformation..,單次頂及頂針停留,我們的頂出時(shí)間一的選擇,機(jī)械手取產(chǎn)品,脫模順利的情況都采取多項(xiàng),為了般是與機(jī)械手配合為宜,全自動(dòng)使用機(jī)械手時(shí)頂出停留頂針油缸 壽命的延長,多次頂就以不超過三次為宜,頂針,半自動(dòng)生產(chǎn),如因頂針退回會(huì)導(dǎo)致停留一般用在頂針帶著產(chǎn)品退回有可能對(duì)增品產(chǎn)生損傷產(chǎn)品掉落或卡緊,而取不下產(chǎn)品,停留時(shí)間則應(yīng)保持5秒的模具,同時(shí)為配合機(jī)械手使用,有時(shí)也需要較短的頂針 PCE pany, for using manipulator in abundence ，The way of knocking out includes knocking out once, knocking out time suits manipulator, Knocking out delay Knocking out repeat and ejector product by keeps second when using manipulator fullmanipulator or take product easy, it should select knocking manipulator, knocking out delay keeps about 5 second out longer the work time of ejector oiljar, times of when using manipulator semimanipulator and product will knocking out lower 3 delay used when fall or can’t be taken off if ejector will be damaged if ejector back or suit ,模具安全起很成型時(shí)間的設(shè)定大作用,配合好模具低壓位置和低壓壓力的調(diào)整,低壓保護(hù)的時(shí)間應(yīng)取13秒,保護(hù)時(shí)間越短,可能造成的危害則Molding time setting protect is very im