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PET注塑工藝篇一

molding technique procedure and parameter introduction 第一節(jié) 成型工藝

section 1 molding technique.1.成型工藝參數(shù)類型

sorts of molding parameter.(1).注塑參數(shù)

injection parameter.a.注射量 injection rate.b.計量行程

screw back position c.余料量 cushion d.防誕量

sucking back rate e.螺桿轉(zhuǎn)速 screw speed f.塑化量 lastic rate g.預(yù)塑背壓

screw back pressure h.注射壓力和保壓壓力

injection pressure and holding pressure i.注射速度 injection speed(2)合模參數(shù)

clamping parameter a.合模力 clamping force b.合模速度 clamping speed ng stroke d.開模力 opening force e.開模速度 opening speed f.開模行程 opening position g.頂出壓力

ejector advance pressure h.頂出速度

ejector advance speed i.頂出行程

ejector advance position 2.溫控參數(shù)

temperature parameter a.烘料溫度

dry resin material temperature b.料向與噴嘴溫度

cylinder temperature and nozzle temperature c.模具溫度 mold temperature d.油溫

oil temperature 3.成型周期 molding cycle a.循環(huán)周期 cycle time b.冷卻時間 cool time c.注射時間 injection time d.保壓時間

holding pressure time e.塑化時間

lant time

f.頂出及停留時間

knocking out and delay time g.低壓保護(hù)時間 mold protect time g technique parameter setting differs depending on type of product 第二節(jié)成型條件設(shè)定

section 2 molding parameter setting 按成型步驟:可分為開鎖模,加熱,射出,g steps: mold opening/closing, heating injection and knocking out.開鎖模條件: mold opening parameter: 快速段中速度

低壓高壓速度 high-speedmid-speed low pressure high pressure speed 鎖模條件設(shè)定: mold closing parameter setting 1鎖模一般分:快速→中速→低壓→高壓

mold closing: high-speed →low-speed →low pressure→high pressure

2.快鎖模一般按模具情況分,如果是平面二板模具,快速鎖模段可用較快速度,甚至于用到特快,當(dāng)用到一般快速時,速度設(shè)到55-75%,完全平面模可設(shè)定到80-90%,如果用到特快就只能設(shè)定在45-55%,壓力則可設(shè)定于50-75%,位置段視產(chǎn)品的深淺(或長短)不同,一般是開模寬度的1/ high-speed section, mold closing speed depends on type of two –plate mold it can set quick and even especially quick usually, it set speed within 55-75%.for full-plate mold it set speed within80-90% while using especially high speed it set speed within 45-55% and pressure within 50-75% position distance setting differs depending on the volume of product and usually it can be set 1/3 of mold opening position.3.中速段,在快速段結(jié)束后即轉(zhuǎn)換成中速,中速的位置一般是到模板(包括三板模,二板模)合在一塊為止,具體長度應(yīng)視模板板間隔,速度一般設(shè)置在30%-50%間,壓力則是20%-45% mid-speed section: mold closing speed changes into mid-speed after high-speed section -speed start position is where two plates meet(include three-plate mold and two-plate mold)distance of mid-speed is up to distance of two plates plate it speed within 30-50% and pressure 20-45%.4.低壓設(shè)定,低速設(shè)定一般是在模板接觸的一瞬間,具體位置就設(shè)在機(jī)臺顯示屏顯示的一瞬間的數(shù)字為準(zhǔn),這個數(shù)字一般是以這點(diǎn)為標(biāo)準(zhǔn),，即于此點(diǎn)則起不了高壓,高于此點(diǎn)則大,輕易起高壓.設(shè)定 的速度一般是15%-25%,視乎不同機(jī)種而定,壓力一般設(shè)定于1-2%,有些機(jī)則可設(shè)于5-15%,-pressure section: mold closing sets low-pressure when plates position is set to the data of machine screen on this point is the gage of the lower the point there is no higher the point there is high-pressure set speed within 15-25% and pressure within 1-2% depending on type within 1-2% depending on type of injection molding machine.5.高壓設(shè)定,按一般機(jī)臺而言,高壓位置機(jī)臺在出廠時都已作了設(shè)定,相對來講,是不可以隨便更改的,比如震雄機(jī)在50p.速度相對低壓略高,大約在30-35%左右,而壓力則視乎模具而定,可在55-85%中取,比如完全平面之新模,模具排氣良好,甚至于設(shè)在55%即可,如果是滑塊較多,原來生產(chǎn)時毛邊也較多,甚至于可設(shè)在90%-pressure section: to normal injection molding machine, high-pressure position had been set before they were sent to can not be example high-pressure position of chenhsong machine is speed of high-pressure section is about 30-35% and higher than that of pressure is up to mold, it can set within 55-85% for full-plate mold, it’s eject air well, it can set pressure 55%.if mold has a lot of slides and flash rate high in production, pressure can set 90%.加熱工藝條件設(shè)定

heating technique parameter setting 1.加熱段溫度設(shè)定必須按照產(chǎn)品所使用的原料的不同而不同,但卻必須遵循一個這樣的規(guī)則, proper temperature setting differs depending on type of resin material, but it must be abide by a rule that temperature setting should diminish in step 10.c from nozzle to feeding resin material position.2特殊情況下.如料頭抽絲,則射口筒溫度應(yīng)降低, temperature setting should low if product resin material such as ps, pa, cool very soon , nozzle temperature should higher more 10.c than the second cylinder temperature.3.機(jī)臺馬達(dá)啟動溫度視乎機(jī)臺不同而不同,一般出于對機(jī)臺油路中的油封保護(hù)需要,油溫最好能控制在40度-60度,以免油封長期高壓而變化,縮短使用壽命, turning on temperature is different depending on type of injection molding protect oil seal of machine it set oil temperature within 40.c-60.c, if oil seal work on condition that high pressure and damaged it’s work time will be shorter, it

can cause molding stable.第三節(jié)注射及熔膠(加料)工藝條件設(shè)定

injection and plastic technique parameter setting 一.注射 injection 第四節(jié)常見塑料原料的有關(guān)溫度值.原料 resin名稱 name熔點(diǎn)℃

melt’s成型溫度℃

molding temperature(’c)分解溫度℃

decomposing temperature(‘c)模具溫度℃

mold temperature(‘c)干燥溫度℃

resin dry temperature(‘c)

注射是把塑料原料經(jīng)加熱后射進(jìn)模腔的過程,它一般可分為第一級,第二級,第三級,第四級及保壓幾段: injection is a step which inject melt resin material into consists of stepl,step2 ,step3,step4 and holding pressure step: 1.第一級注射一般是注射料頭段.具注射量一般可根據(jù)料頭的輕重來估計其行程,當(dāng)然也可以依據(jù)公式來計算,如公式: step l injects usually tunnel material, injection volume can be estimated according to the weight of course it can be calculated by formula: l=si=vi/0.785ds2 l:注射行程;si:注射行程;l: injection stroke si: injection stroke vi:理論注射容積;ds:螺桿直徑;vi: injection volume of theoretical ds: diameter of screw 0.785:是ω/4的值.0.785: value ofω/4.當(dāng)然,如果我們在成型時每設(shè)定一個參數(shù)都要計算一次, it cost a lot of time to produce one product if every time molding parameter is setting by calculation.2.第二級是注塑產(chǎn)品約2/3的階段,當(dāng)然,根據(jù)產(chǎn)品特殊需要,也允許成型不到2/3階段,比如避免結(jié)合線問題,這一階段的成型速度及壓力一般是整個成型段的最大值段,如果排的產(chǎn)品與機(jī)臺基本

是相吻合的.模具結(jié)構(gòu)合理,排氣良好,這一段的壓力一般也不會超過80%.速度側(cè)視產(chǎn)品需變,可能大到95%也可,自然一般都是在55%-80% 2 inject 2/3 of can lower 2/3 of product according to requirement of example to prevent weld g speed and pressure on this step is the maximum of whole molding mold suit the injection molding machine and mold structure reasonable and eject air well, pressure of this step should lower 80%.molding speed setting within 55-80% but it may setting 95% for especial product.3.第三段是注射余下的1/3段,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往下降的過程.主要是為了防止產(chǎn)品毛邊的產(chǎn)生,3 inject remain 1/3 of ing to product molding speed and pressure lower than that of step2 to prevent flash speed and pressure should decrease but it can’t shot short.4.第四段:一般有機(jī)臺還有第五,第六段,這段的成型速度和壓力相同前,4 section: some injection machines have step5,step6 which are same as former molding speed and pressure this step should diminish and inject once more.5.保壓段:不論成型什么產(chǎn)品,都存在一個保壓過程.任何產(chǎn)品都不同程度的存在一個厚薄不一的問題,正常情況下,較厚的部分都可能存在一個收縮凹陷的現(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%g pressure step: no matter what product there is a holding pressure product can’t molding a same y the deeper section may sink prevent this defect it should set holding pressure, the injection speed of holding pressure step is slow but holding pressure setting within 25-80% depending on sink mark.二.熔膠段工藝 lastic technique 1.再復(fù)雜的熔膠旋轉(zhuǎn)過程最多不會超過三段,因為熔膠本身就是存在于把膠熔進(jìn)料筒的過程,如果原料粘度大,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越大,料管溫度則越高,局部原料產(chǎn)生分解的可能性則會越大,故一般熔膠會采用中速為宜,如45%-75%,熔膠同時會碰到一個比較重要的環(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)品則尺寸更穩(wěn)定,外觀越好.當(dāng)然,背壓太大,則會產(chǎn)生流涎, should lower 3 steps, because plastic is a step to add melt resin material to cyclinder , higher stick of resin material ,higher screw back speed differs depending on decomposing temperature of resin material ,higher screw speed ,higher

trim force of resin, higher cyclinder resin material may decomposes so it set screw speed in mid-speed such as 45-75%, in plastic step setting screw back pressure is very important, higher screw back pressure ,higher quality of product screw back pressure make resin structure order, molding product is beautiful and volume ,it maybe flow if screw back pressure too all factors should be considered when using screw back pressure.2.熔膠過程還有一個比較重要的環(huán)節(jié),那就是松退,松退分前松退和后松退,其作用一般是為了防止流涎和抽絲,設(shè)定值速度和壓力都在20%-50%間,設(shè)定的行程一般在2-5cm間,太長的行程可能會使料筒里面貯存空氣, plastic step sucking back is very important g back include front sucking back and back sucking back it setting sucking back to prevent flow and sets sucking back speed and pressure within 20-50% and distance within long distance make cyclinder reserve air and cause bubble at next molding.頂出的工藝設(shè)定

knocking out technique setting 產(chǎn)品經(jīng)冷卻定型后則有一個開模的過程,開?；旧鲜呛夏５姆催^程.開模的未段則有一個慢速設(shè)置,開模完成后, is a mold opening step after product cooling taking opening is a reverse step of mold last step of mold opening speed set t should be knocked out after mold opened.一.頂前: knocking out 頂前最好分兩個階級,第一階可分為中壓慢速,即是把產(chǎn)品輕輕頂出一部分,然后是中壓中速頂,中壓中速一般指的是35%-55%,而低速則有可能低到5%,這需視產(chǎn)品不同而言,ng out includes two steps, step1 section setting mid-speed, knocks product out partly step2 section setting mid-pressure and ing on different product, mid-pressure and mid-speed sets within 35-55% but low-speed can set 5%.distance of knocking out longer 1-2cm than the vertical thickness of product.二.退針 back 頂退包括兩個過程與頂落的過程基本一致,頂退的終點(diǎn)應(yīng)預(yù)留1-3cm的空間, same as knocking out, ejector back includes 2 protect the ejector oil jar, it should make a 1-3mm distance in the ending point of ejector back.三.頂針方式還包括一個多次頂,單次頂及頂針停留的選擇,機(jī)械手取產(chǎn)品,脫模順利的情況都采

取多項,為了頂針油缸 壽命的延長,多次頂就以不超過三次為宜,頂針停留一般用在頂針帶著產(chǎn)品退回有可能對增品產(chǎn)生損傷的模具,同時為配合機(jī)械手使用, way of knocking out includes knocking out once, knocking out repeat and ejector product by manipulator or take product easy, it should select knocking out longer the work time of ejector oiljar, times of knocking out lower 3 r delay used when product will be damaged if ejector back or suit manipulator.成型時間的設(shè)定 molding time setting 在保證產(chǎn)品質(zhì)量的前提下,周期時間是越短越好,周期時間又包括如下幾項:射膠時間,保壓時間,熔膠時間,冷卻時間,頂出時間,鎖模低壓時間,甚至乎關(guān)系到時間因素的還有還開模與鎖模, time should shorter on condition that product quality time includes: injection time , holding pressure time, plastic time, cure time, knocking out time and mold protect mold opening closing sopeed and knocking out speed affect cycle.1.射膠時間包含保壓時間,一般看起來,射膠時間越長,產(chǎn)品越飽和,但我們在講求質(zhì)量時,同時也須考慮產(chǎn)能,更何況,射膠時間過長,有可能會造成產(chǎn)品過于飽滿而尋致粘模頂?shù)淖冃螀沾缙蟮纫幌盗袉栴},故我們在設(shè)置射膠時間時應(yīng)綜合考慮,ion time consists holding pressure injection time, fuller product, we should consider production quantity when we suit for injection 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 requirement.2.熔膠時間的長短取決于熔膠速度設(shè)定的快慢,背壓設(shè)定的大小,但有一點(diǎn), time depends on plastic speed and screw back pressure, but plastic time must shorter than cure time.3.冷卻時間:冷卻時間的長短直接影響到成型的周期,冷卻時間越長,成型時間就越長,造成產(chǎn)能就越低,故我們在設(shè)定高壓冷卻時間時,只要能保證到產(chǎn)品成型順利,不會直接影響到變形等問題, time: cure time affects molding cure time, longer molding cycle, lower production it sets cure time short on condition that product molding succed and can’t deformation..4.在大量使用機(jī)械手的塑膠公司,我們的頂出時間一般是與機(jī)械手配合為宜,全自動使用機(jī)械手時頂出停留時間一般保持1.5-2秒,半自動生產(chǎn),如因頂針退回會導(dǎo)致產(chǎn)品掉落或卡緊,而取不下產(chǎn)品, pce company, for using manipulator in abundence , knocking out time suits

manipulator, knocking out delay keeps 1.5-2 second when using manipulator full-manipulator, knocking out delay keeps about 5 second when using manipulator semi-manipulator and product will fall or can’t be taken off if ejector back.5.低壓保護(hù)時間對保護(hù)我們?nèi)松戆踩?模具安全起很大作用,配合好模具低壓位置和低壓壓力的調(diào)整,低壓保護(hù)的時間應(yīng)取1-3秒,保護(hù)時間越短,-pressure protect is very important for safety and protect mold, mold protect time should adjust within 1-3 second suit low pressure and position of mold protect, shorter protect time, make e appearance 外觀 glossiness/gloss finish 光潔度 matt finish/matt surface 毛面

glass fiber rich surface/glass emergence on the surface 玻纖外露 blooming/surface blooming 表面析出 white patches on surface 表面白斑 silver marks/silver streak 銀紋 splay mark 水紋 flow mark 流紋 weld line 溶結(jié)紋 brittle/brittleness 脆 bubbles/trapped gas 氣泡 void 孔

burn marks 燒傷

fr failed 阻燃不合格 flame rating v-2 阻燃v-2 poor dispersion 分散不好

fr/ptfe …agglomerates etc 阻燃劑/ptfe…結(jié)塊 pellet porous 粒子不密/蜜蜂窩 low impact/tensile etc 物理性能低

high flow/filler content etc 流動性/填充…過高 longs/fines/doubles 長粒/碎屑/連粒 poor cut 粒形不好

bristle/voids 表面有小氣泡/孔 glass bundles 玻纖結(jié)團(tuán)

product was rejected due to 產(chǎn)品不能接受因為… high moisture level 高水分 warpage/warped 翹曲 shrinkage/shrink 收縮 sink marks 縮影

short shot/short molding 打不滿 distortion 變形

over dimension 尺寸過大 under dimension 尺寸過小

flashing 飛邊 discoloration 變色 off color 顏色差異 flow rate 流動率 viscous 粘

high flow 高流動 low flow 低流動 sticky 粘

mold release 脫模 antioxidant 抗氧劑

flame retardant agent 阻燃劑 heat stabilizer 熱穩(wěn)定劑

chopped glass fiber 短切玻纖

roving glass fiber 粗紗/長玻纖 glass beads 玻璃微珠 milled fiber 碾磨纖

molybdenum disulfide/moly/mos2 二硫化鉬 colorant 著色劑 pigment 顏料

dye 染料

accepted product specification 接受產(chǎn)品規(guī)格 approved our product 認(rèn)可我們的產(chǎn)品 re-set spec 重新定標(biāo)準(zhǔn)

add in extra … 添加多一點(diǎn)…

reduced … content 減少…含量

dropped/reduced … by x％ 減少…含量…％ confirmed color standard 確認(rèn)顏色標(biāo)準(zhǔn) approved color standard 認(rèn)可顏色標(biāo)準(zhǔn) re-confirmed color standard 重新確認(rèn)顏色標(biāo)準(zhǔn) qualified our product 認(rèn)可我們的產(chǎn)品

undergoing heat aging test 在做熱老化實(shí)驗 product is under testing 產(chǎn)品在測試當(dāng)中 received first order 接了第一個定單

expected to finish by … 預(yù)計在…完成 expected order is xmt 預(yù)計定單量…噸

estimated annual/monthly consumption 預(yù)計年/月用量

PET注塑工藝篇二

to：

from:

t e l：

petg/pctg塑料的簡介

本公司專業(yè)總代理韓國petg/pctg聚酯塑料, 聚酯塑料制品高度透明，抗沖擊性能優(yōu)異,，特別適宜成型厚壁透明制品,對比pc(聚碳酸酯)塑料,petg/pctg聚酯塑料有如下突出特點(diǎn):

1)petg/pctg

經(jīng)過燃燒或降解之后只剩下co2和水,，對人體及環(huán)境不會產(chǎn)生任何影響！尤其現(xiàn)在國際主流大力提倡環(huán)境保護(hù)的前提下,，這種環(huán)保型材料更是受到各地政府與消費(fèi)者的親睞,！petg/pctg以其環(huán)保性(fda/rohs/sgs認(rèn)證)材料將被大力提倡使用,在歐美日等許多發(fā)達(dá)國家更始非常重視這一點(diǎn).2)它具有優(yōu)異的光學(xué)性能

petg/pctg是一種高透明的、高光澤表面,、低渾濁度的非結(jié)晶聚酯塑料,，透光率≥91％,與亞克力(pmma)相同,比聚碳酸酯(pc)的透光率要好，就算是做成厚壁的化妝品膏霜瓶或透明鞋跟也能象玻璃一樣清透.3)它具有極高的韌性和優(yōu)異的抗拉伸性能

petg/pctg堪稱“"捶不爛” ,它具有超強(qiáng)韌性,而且petg/pctg拉伸比率更可達(dá)到180%多,我們曾經(jīng)做過這樣兩個試驗:落球沖擊3毫米厚的petg/pctg板材可反彈5.4公斤重的球體;1公斤重球體10米跌落到3毫米厚的petg/pctg板材無開裂,。

4）petg/pctg具有很好的耐抗沖擊性能

其抗沖擊強(qiáng)度是亞克力的3~10倍,遠(yuǎn)高于abs.據(jù)客戶測試反映,當(dāng)petg/pctg做成薄片時,抗沖擊性比pc稍遜,但當(dāng)他被加工成厚壁的制品時,其抗沖性能與pc別無兩樣,，但是petg/pctg突出的優(yōu)勢在于,/pctg在零下40℃時可正常使用,因為其具有出色延展性和超強(qiáng)韌性, 不太容易因為在低溫環(huán)境中受內(nèi)應(yīng)力影響而使產(chǎn)品發(fā)生形變或者破裂現(xiàn)象等.6)petg/pctg具有

（如咖啡、巧克力,、油脂,、酸等）,它對以下化學(xué)物質(zhì)具有優(yōu)異的耐化學(xué)性：汽車用油、肥皂液,、去垢劑,、清潔劑、地毯洗潔劑,、牙膏和薄荷油,、香水、烹調(diào)油,、2-丙醇,、烴類溶劑等。

7)petg/pctg具有樂趣無窮的出色的延展性決定了petg/pctg的多種二次加工方式成為可能,。您可以對petg/pctg產(chǎn)品進(jìn)行激光切割,、銑邊、模切,、鉆孔,、焊接、沖孔,、熱彎,、冷彎（限2.5毫米以下）、螺絲/鉚釘/螺栓連接或固定.8)它具有優(yōu)異的印刷性能和涂覆性能

也就是說petg/pctg塑料制品表面無須經(jīng)過任何特別表面處理就可以進(jìn)行各種印刷(絲印,、移印,、熱壓印等)和噴涂。

9)petg/pctg具有可以有多樣的隨意粘合方法:如一般溶劑,、一般粘合劑,、摩擦粘合、高周波粘合,、超音波粘合,、機(jī)械方式粘合（螺絲、鉚釘?shù)龋?.10)petg/pctg具有出色的注塑加工性能

petg/pctg一旦正常生產(chǎn), 注塑工藝非常穩(wěn)定,而且還不需要特別設(shè)計的注塑機(jī)臺,其注塑溫度僅為220℃~235℃左右,。

小結(jié)：以上可以得知,，目前這種材料的特性，使其更廣泛的用在于食品,、醫(yī)療,、化妝品等高端產(chǎn)品上面，且其優(yōu)異的環(huán)保性能以及各種認(rèn)證（fda/rohs/sgs認(rèn)證）將是您更好的選擇,。

預(yù)祝

商祺!

PET注塑工藝篇三

注塑吹塑成型介紹

注塑吹塑成型是生產(chǎn)塑料瓶的兩步法工藝,。第一步將塑料用注塑成型法制成有底空心型坯,。當(dāng)塑料注人預(yù)成型模內(nèi)芯桿周圍的時候瓶頸和型坯便形成。在這一步,，型坯進(jìn)行溫度狀態(tài)調(diào)節(jié),。然后型坯經(jīng)芯桿轉(zhuǎn)移到吹塑模內(nèi)，空氣經(jīng)芯桿導(dǎo)入,，將型坯吹塑成模型的形狀,。瓶子成型完畢以后，轉(zhuǎn)移到排出段,。

注塑吹塑成型的優(yōu)點(diǎn)很多：

無下腳料,，尺寸精確，瓶子制成后無需二次加工,。

成品瓶子的重量精確度可控制在土0．l克,。

瓶頸的形狀和瓶子內(nèi)外成型精度可達(dá) ± 0．004英寸。

瓶子重量與尺寸的可重復(fù)性適于匹配,，并易于與灌裝線連接,。

由于有一定的雙軸取向作用，可使多種不同材料的透明度與強(qiáng)度獲得改善,。在排出段瓶子受控于一定的方向,，從而可進(jìn)行自動化在線裝飾和灌裝。操作人員的工作量很小,。

設(shè)備

用現(xiàn)有的注塑吹塑成型機(jī)進(jìn)行有盈利的塑料瓶生產(chǎn)時,，瓶的大小和形狀受到一定限制。市場上可以買到的注塑吹塑成型機(jī)有數(shù)種,，它們從一段向另一段轉(zhuǎn)移芯桿的方法不同,，包括穿棱式的，兩位（段）旋轉(zhuǎn)式的,，軸向移動式的和三段及三段以上旋轉(zhuǎn)式的,。當(dāng)今三段或四段旋轉(zhuǎn)機(jī)頗受歡迎。這類設(shè)備可分為兩大類：即吹塑總成組件,，這種組件可以安裝在某些工業(yè)注塑成型機(jī)上,；和成套注塑吹塑成型設(shè)備，配有塑煉機(jī),、液壓裝置,、控制裝置和其他配套部件。這些設(shè)備還可進(jìn)一步區(qū)分為：帶垂直作往復(fù)式螺桿塑煉機(jī)的,，和帶水平往復(fù)式螺桿塑煉機(jī)的,。

垂直式的比往復(fù)式的簡單得多，在相等的充模速度和較低注射壓力下（如有必要）注射量相同時,，它的部件少,、能耗小,、占地少、維修簡便,。

往復(fù)式螺桿塑煉機(jī)主要是為注射成型研制的,；雖然它的結(jié)構(gòu)比垂直式的復(fù)雜，但操作的可靠性較好,。

當(dāng)前的成型機(jī)械，包括大型的標(biāo)準(zhǔn)生產(chǎn)裝置,，可在較高的生產(chǎn)速度下生產(chǎn)出較大的瓶子來,；注射裝置的完善使聚氯乙烯和含丙烯睛的樹脂更易于加工；增加工段（位）的開發(fā)工作正在繼續(xù)進(jìn)行,。

通常,，醫(yī)藥工業(yè)和化妝品工業(yè)是16央司和更小的注塑吹塑成型塑料瓶的市場。專門為這種工藝開發(fā)的新原料已經(jīng)使注塑吹塑成型工廠進(jìn)入其他市場,。聚丙

烯共聚物加工容易,，透明度好，而且成型快,，故實(shí)際上已經(jīng)取代了裝咳嗽感冒藥和漱口劑的玻璃瓶,。

其他新型樹脂有注塑吹塑級聚氯乙烯均聚物和聚碳酸酯。這些結(jié)晶透明的材料已經(jīng)比較容易地在垂直螺桿機(jī)上進(jìn)行了加工,，也在裝有連續(xù)柱塞螺桿的水平螺桿機(jī)上進(jìn)行了加工,。

新型的流線型歧管加上改進(jìn)的含丙烯腈樹脂和聚氯乙烯樹脂已經(jīng)使多腔室操作成為現(xiàn)實(shí)，盡管這些樹脂是熱敏性的,。一個8一腔室模具已成功地用于聚氯乙烯加工,，數(shù)個12一腔室的模具目前已應(yīng)用于含丙烯睛樹脂瓶的生產(chǎn)。

現(xiàn)有數(shù)個公司正要用8一腔室模具生產(chǎn)聚氯乙烯瓶子,，它01的材料是經(jīng)過改性的,，以降低其熱敏性。現(xiàn)已明顯,，采用較大的機(jī)器,，較高的合模壓力和較大的壓板面積將能經(jīng)濟(jì)地生產(chǎn)出4升以下的塑料瓶。精確的瓶頸和無下腳料這樣的優(yōu)點(diǎn)將能逐步補(bǔ)償工模具的較高成本,。

由于機(jī)器的發(fā)展（增加段數(shù)）和模具設(shè)計的革新,，未來的開發(fā)工作將致力于樹脂定向性的改善。模具設(shè)計技術(shù)的進(jìn)步已能制造偏頸塑料瓶,、方頸塑料瓶,，可使瓶底上帶精密的槽，和減少整個瓶壁的厚度,，縮短制作時間,。

模具設(shè)計的發(fā)展將使注塑吹塑成型逐步進(jìn)入家用化學(xué)品,、玩具，特別是食品容器市場,。

PET注塑工藝篇四

泵用材料介紹

一,、鑄鐵

1、灰口鑄鐵

最常用的一種鑄鐵,，國標(biāo)代號為ht,。一般清水泵的泵體、葉輪,、泵蓋,、懸架等均采用該材料，通常用到三種牌號：ht150,、ht200,、ht250。對于底座,、墊板等非主要零件多采用ht150,，泵體、泵蓋,、懸架等多采用ht200,，而葉輪、口環(huán),、軸套等多采用ht250,。

各國對灰鐵的表示方法有所不同，如日本的代號為fc,，德國的代號為gg,，美國為class。

2,、球墨鑄鐵

是一種綜合性能較好的鑄鐵,，國標(biāo)代號為qt。由于其力學(xué)性能接近鋼,，同時其鑄造性能,、加工性能優(yōu)于鋼，因此通常把它作為鑄鋼的替代品,。最常用到的牌號有：qt450-

10,、qt500-

7、qt600-3,。由于受鑄造等原因的限制,，公司目前暫不做該材料。

din標(biāo)準(zhǔn)對球墨鑄鐵的表示方法為ggg，美國的表示方法為ductile iron,。

另外還有耐腐鑄鐵——高硅鑄鐵,，耐磨鑄鐵——白口鑄鐵，高韌性鑄鐵——可鍛鑄鐵等,，公司現(xiàn)有產(chǎn)品尚未用到,。

二、鑄鋼

由于鑄鋼的強(qiáng)度轉(zhuǎn)高,，通常當(dāng)壓力＞1.6mpa時,，承壓零件多采用鑄鋼，其國標(biāo)代號為zg,，最常用的牌號為zg230-450,。

日本和美國通常用cs表示鑄鋼。

三,、不銹鋼

應(yīng)用最多的不銹鋼為奧氏體不銹鋼，如0cr18ni9,、1cr18ni9ti,、0cr18ni12mo2ti等。除鹽酸,、稀硫酸等少數(shù)介質(zhì)外,，奧氏體不銹鋼是優(yōu)良的耐腐蝕材料，是化工泵最常采用的耐腐材料,。日本和美國通常用ss304,、ss316、ss316l來表示奧氏體不銹鋼,。

馬氏體不銹鋼如2cr13,、3cr13，其力學(xué)性能優(yōu)于奧氏體不銹鋼,，通常被用作泵軸和軸套的材料,，日本和美國的對應(yīng)代號為ss420。

另外,，高合金不銹鋼（20號合金）和雙項不銹鋼也是較理想的耐腐蝕材料,。

四、碳素結(jié)構(gòu)鋼

通常分為普通碳素結(jié)構(gòu)鋼和優(yōu)質(zhì)碳素結(jié)構(gòu)鋼,。

最具代表性的普通碳素結(jié)構(gòu)鋼為q235,，各類鋼板、型鋼多采用該材料,；最具代表性的優(yōu)質(zhì)碳素鋼為45號鋼,，其廣泛用于無腐蝕要求時的泵軸材料。

五、合金鋼

最具代表性的合金鋼為40cr,，通常用于高強(qiáng)度泵軸的材料,。

六、非金屬材料

泵用非金屬材料主要用于密封,，如聚四氟乙烯,、氟橡膠、丁腈橡膠等,。其中聚四氟乙烯因具有優(yōu)良的耐腐蝕,、耐高溫性能而用于化工泵的密封墊以及機(jī)械密封的靜密封，適用于250℃內(nèi)幾乎所有的化工介質(zhì),，其缺點(diǎn)是硬度較高,、裝配難度大。

氟橡膠也是一種較好的耐溫,、耐腐蝕材料,，耐溫上限以160℃為宜，當(dāng)用戶無特殊要求時,，公司化工泵均采用該材料的密封圈,；而丁腈橡膠主要用于耐油或清水介質(zhì)時的靜密封。

PET注塑工藝篇五

成型工藝流程及條件介紹

molding technique procedure and parameter introduction

第一節(jié) 成型工藝

section 1 molding technique.1.成型工藝參數(shù)類型

sorts of molding parameter.(1).注塑參數(shù)

injection parameter.a.注射量

injection rate.b.計量行程

screw back position

c.余料量

cushion

d.防誕量

sucking back rate

e.螺桿轉(zhuǎn)速

screw speed

f.塑化量

plastic0 rate

g.預(yù)塑背壓

screw back pressure

h.注射壓力和保壓壓力

injection pressure and holding pressure

i.注射速度

injection speed

(2)合模參數(shù)

clamping parameter

a.合模力

clamping force

b.合模速度

clamping speed

ng stroke

d.開模力

opening force

e.開模速度

opening speed

f.開模行程

opening position

g.頂出壓力

ejector advance pressure

h.頂出速度

ejector advance speed

i.頂出行程

ejector advance position

2.溫控參數(shù)

temperature parameter

a.烘料溫度

dry resin material temperature

b.料向與噴嘴溫度

cylinder temperature and nozzle temperature

c.模具溫度

mold temperature

d.油溫

oil temperature

3.成型周期

molding cycle

a.循環(huán)周期

cycle time

b.冷卻時間

cool time

c.注射時間

injection time

d.保壓時間

holding pressure time

e.塑化時間

plant time

f.頂出及停留時間

knocking out and delay time

g.低壓保護(hù)時間

mold protect time

g technique parameter setting differs depending on type of product 第二節(jié)成型條件設(shè)定

section 2 molding parameter setting

按成型步驟:可分為開鎖模,加熱,射出,g steps: mold opening/closing, heating injection and knocking out.開鎖模條件:

mold opening parameter:

快速段中速度

低壓高壓速度

high-speedmid-speed

low pressure high pressure speed

鎖模條件設(shè)定:

mold closing parameter setting

1鎖模一般分:快速→中速→低壓→高壓

mold closing: high-speed →low-speed →low pressure→high pressure

2.快鎖模一般按模具情況分,如果是平面二板模具,快速鎖模段可用較快速度,甚至于用到特快,當(dāng)用到一般快速時,速度設(shè)到55-75%,完全平面?？稍O(shè)定到80-90%,如果用到特快就只能設(shè)定在45-55%,壓力則可設(shè)定于50-75%,位置段視產(chǎn)品的深淺(或長短)不同,一般是開模寬度的1/3.同而不同,但卻必須遵循一個這樣的規(guī)則,即由射口筒到

in high-speed section, mold closing speed depends on of two –plate mold it can set quick and even

especially quick usually, it set speed within 55-75%.for

the proper temperature setting differs depending on full-plate mold it set speed within80-90% while using type of resin material, but it must be abide by a rule that especially high speed it set speed within 45-55% and temperature setting should diminish in step 10.c from pressure within 50-75% position distance setting differs nozzle to feeding resin material ing on the volume of product and usually it can be set 1/3 of mold opening position.2特殊情況下.如料頭抽絲,則射口筒溫度應(yīng)降低,如

果是比較特殊的原料冷凝比較快的.則射口筒溫度則不

3.中速段,在快速段結(jié)束后即轉(zhuǎn)換成中速,中速的位

止比第二節(jié)法蘭溫度高10度.比如pps.尼龍等.置一般是到模板(包括三板模,二板模)合在一塊為止,具

體長度應(yīng)視模板板間隔,速度一般設(shè)置在30%-50%間,壓

nozzle temperature setting should low if product line.力則是20%-45% resin material such as

in mid-speed section: mold closing speed changes into

pps, pa, cool very soon , nozzle temperature should mid-speed after high-speed section -speed start higher more 10.c than the second cylinder on is where two plates meet(include three-plate mold and two-plate mold)distance of mid-speed is up to

3.機(jī)臺馬達(dá)啟動溫度視乎機(jī)臺不同而不同,一般出于distance of two plates plate it speed within 30-50% and 對機(jī)臺油路中的油封保護(hù)需要,油溫最好能控制在40度-pressure 20-45%.60度,以免油封長期高壓而變化,縮短使用壽命,造成成型

不穩(wěn)定.4.低壓設(shè)定,低速設(shè)定一般是在模板接觸的一瞬間,具體位置就設(shè)在機(jī)臺顯示屏顯示的一瞬間的數(shù)字為準(zhǔn),pump turning on temperature is different depending on 這個數(shù)字一般是以這點(diǎn)為標(biāo)準(zhǔn),，即于此點(diǎn)則起不了高壓,type of injection molding protect oil seal of 高于此點(diǎn)則大,輕易起高壓.設(shè)定的速度一般是15%-25%,machine it set oil temperature within 40.c-60.c, if oil seal 視乎不同機(jī)種而定,壓力一般設(shè)定于1-2%,有些機(jī)則可設(shè)work on condition that high pressure and damaged it’s

work time will be shorter, it can cause molding stable.于5-15%,-pressure section: mold closing sets low-pressure 第三節(jié)注射及熔膠(加料)工藝條件設(shè)定 when plates position is set to the data of

machine screen on this point is the gage of the

injection and plastic technique parameter setting lower the point there is no

higher the point there is high-pressure set speed

一.注射 within 15-25% and pressure within 1-2% depending on

type within 1-2% depending on type of injection molding

injection machine.第四節(jié)常見塑料原料的有關(guān)溫度值.5.高壓設(shè)定,按一般機(jī)臺而言,高壓位置機(jī)臺在出廠

時都已作了設(shè)定,相對來講,是不可以隨便更改的,比如震

原料 雄機(jī)在50p.速度相對低壓略高,大約在30-35%左右,而壓

力則視乎模具而定,可在55-85%中取,比如完全平面之新

resin名稱 模,模具排氣良好,甚至于設(shè)在55%即可,如果是滑塊較多，原來生產(chǎn)時毛邊也較多,甚至于可設(shè)在90%熔點(diǎn)℃

high-pressure section: to normal injection molding

melt’s成型溫度℃machine, high-pressure position had been set before they

were sent to can not be example

molding temperature(’c)分解溫度℃ high-pressure position of chenhsong machine is

speed of high-pressure section is about 30-35%

decomposing temperature(‘c)模具溫度℃ and higher than that of pressure is up to mold, it can set within 55-85% for full-plate mold, it’s

mold temperature(‘c)干燥溫度℃ eject air well, it can set pressure 55%.if mold has a lot of slides and flash rate high in production, pressure can set

resin dry temperature(‘c)90%.注射是把塑料原料經(jīng)加熱后射進(jìn)模腔的過程,它一

加熱工藝條件設(shè)定

般可分為第一級,第二級,第三級,第四級及保壓幾段:

heating technique parameter setting

injection is a step which inject melt resin material into

consists of stepl,step2 ,step3,step4 and holding

1.加熱段溫度設(shè)定必須按照產(chǎn)品所使用的原料的不pressure step: 是起到一個再次充滿的作用.1.第一級注射一般是注射料頭段.具注射量一般可根

step4 section: some injection machines have 據(jù)料頭的輕重來估計其行程,當(dāng)然也可以依據(jù)公式來計step5,step6 which are same as former molding speed and

pressure this step should diminish and inject once more.算,如公式:

5.保壓段: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/0.785ds2 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%都有可能.l:注射行程;si:注射行程;

holding pressure step: no matter what product there is

l: injection stroke si: injection stroke a holding pressure product can’t molding a same y the deeper section may sink

vi:理論注射容積;ds:螺桿直徑;prevent this defect it should set holding pressure, the injection speed of holding pressure step is slow but holding

vi: injection volume of theoretical ds: diameter of pressure setting within 25-80% depending on sink

二.熔膠段工藝

0.785:是ω/c technique

0.785: value ofω/4.1.再復(fù)雜的熔膠旋轉(zhuǎn)過程最多不會超過三段,因為熔

當(dāng)然,如果我們在成型時每設(shè)定一個參數(shù)都要計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,要成型出一個產(chǎn)品就要幾個小時才能完成了.大,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越大,故一般熔膠會采time molding parameter is setting by calculation.用中速為宜,如45%-75%,熔膠同時會碰到一個比較重要

2.第二級是注塑產(chǎn)品約2/3的階段,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成型段的最大值品則尺寸更穩(wěn)定,外觀越好.當(dāng)然,背壓太大,則會產(chǎn)生流涎,段,如果排的產(chǎn)品與機(jī)臺基本是相吻合的.模具結(jié)構(gòu)合理,所以背壓的使用又應(yīng)考虙到其它原因.排氣良好,這一段的壓力一般也不會超過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 decomposing temperature of resin

step 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 g speed and pressure on this decomposes so it set screw speed in mid-speed such as 45-step 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 55-80% 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 pressure.3.第三段是注射余下的1/3段,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往

2.熔膠過程還有一個比較重要的環(huán)節(jié),那就是松退,下降的過程.主要是為了防止產(chǎn)品毛邊的產(chǎn)生,但同時又松退分前松退和后松退,其作用一般是為了防止流涎和必須把產(chǎn)品充填飽滿.抽絲,設(shè)定值速度和壓力都在20%-50%間,設(shè)定的行程一 般在2-5cm間,太長的行程可能會使料筒里面貯存空氣,step3 inject remain 1/3 of ing to

t molding speed and pressure lower than that of

step2 to prevent flash speed and pressure should decrease

in plastic step sucking back is very important it can’t shot g back include front sucking back and back sucking

back it setting sucking back to prevent flow and sets

4.第四段:一般有機(jī)臺還有第五,第六段,這段的成型sucking back speed and pressure within 20-50% and 速度和壓力相同前,都存在兩段一個遞減過程.其作用都distance within long distance make cyclinder reserve air and cause bubble at next molding.在保證產(chǎn)品質(zhì)量的前提下,周期時間是越短越好,周頂出的工藝設(shè)定 期時間又包括如下幾項:射膠時間,保壓時間,熔膠時間,冷 卻時間,頂出時間,鎖模低壓時間,甚至乎關(guān)系到時間因素

knocking out technique setting 的還有還開模與鎖模,及頂出的快慢.產(chǎn)品經(jīng)冷卻定型后則有一個開模的過程,開?；?/p>

cycle time should shorter on condition that product 上是合模的反過程.開模的未段則有一個慢速設(shè)置,開模quality time includes: injection time , holding 完成后,re time, plastic time, cure time, knocking out time and mold protect mold opening closing sopeed

there 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 slow.1.射膠時間包含保壓時間,一般看起來,射膠時間越product should be knocked out after mold opened.長,產(chǎn)品越飽和,但我們在講求質(zhì)量時,同時也須考慮產(chǎn)能, 更何況,射膠時間過長,有可能會造成產(chǎn)品過于飽滿而尋

一.頂前: 致粘模頂?shù)淖冃螀沾缙蟮纫幌盗袉栴},故我們在設(shè)置

射膠時間時應(yīng)綜合考慮,盡量在合乎質(zhì)量要求時縮短射

knocking out

膠時間.頂前最好分兩個階級,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 ng out includes two steps, step1 section setting

mid-speed, knocks product out partly step2 section setting

2.熔膠時間的長短取決于熔膠速度設(shè)定的快慢,背壓mid-pressure and ing on different 設(shè)定的大小,但有一點(diǎn),熔膠時間控制的長短一定要比冷product, mid-pressure and mid-speed sets within 35-55% low-speed can set 5%.distance of knocking out longer 1-2cm than the vertical thickness of c time depends on plastic speed and screw back pressure, but plastic time must shorter than cure time.二.退針

3.冷卻時間:冷卻時間的長短直接影響到成型的周期,back

冷卻時間越長,成型時間就越長,造成產(chǎn)能就越低,故我們

在設(shè)定高壓冷卻時間時,只要能保證到產(chǎn)品成型順利,不

頂退包括兩個過程與頂落的過程基本一致,頂退的會直接影響到變形等問題,設(shè)定的時間也是越短越好.終點(diǎn)應(yīng)預(yù)留1-3cm的空間, time: cure time affects molding

the same as knocking out, ejector back includes 2

cure time, longer molding cycle, lower production protect the ejector oil jar, it should make a 1-3mm

so it sets cure time short on condition that product molding distance in the ending point of ejector and can’t deformation..三.頂針方式還包括一個多次頂,單次頂及頂針停留

4.在大量使用機(jī)械手的塑膠公司,我們的頂出時間一的選擇,機(jī)械手取產(chǎn)品,脫模順利的情況都采取多項,為了

般是與機(jī)械手配合為宜,全自動使用機(jī)械手時頂出停留頂針油缸 壽命的延長,多次頂就以不超過三次為宜,頂針

時間一般保持1.5-2秒,半自動生產(chǎn),如因頂針退回會導(dǎo)致停留一般用在頂針帶著產(chǎn)品退回有可能對增品產(chǎn)生損傷

產(chǎn)品掉落或卡緊,而取不下產(chǎn)品,停留時間則應(yīng)保持5秒的模具,同時為配合機(jī)械手使用,有時也需要較短的頂針

pce company, 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 1.5-2 second when using manipulator full-manipulator 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 semi-manipulator and product will knocking out lower 3 r delay used when fall or can’t be taken off if ejector t will be damaged if ejector back or suit manipulator.5.低壓保護(hù)時間對保護(hù)我們?nèi)松戆踩?模具安全起很

成型時間的設(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)的時間應(yīng)取1-3秒,保護(hù)時間越短,可能造成的危害則

molding time setting

-pressure protect is very important for safety and protect mold, mold protect time should adjust within 1-3 second suit low pressure and position of mold protect, shorter protect time, make damaged.