Cov txheej txheem yas txhaj tshuaj molding txheej txheem

1. PP khoom yas:
1.1 Txheej txheem cej luam: Polypropylene, abbreviated li PP hauv lus Askiv, yog cov khoom siv waxy dawb nrog qhov ceev ntawm 0.90g/cm3. PP muaj cov khoom siv hluav taws xob zoo thiab tshuaj lom neeg ruaj khov. Nws cov khoom siv hluav taws xob thiab cov cua sov ua haujlwm siab dua li ntawm PE. Lub zog PP tuaj yeem siv los ua cov khoom siv engineering. PP muaj cov khoom siv fiber ntau zoo thiab qaug zog, thiab lub pob khawm ua los ntawm nws tau siv tsis tu ncua rau ntau pua txhiab zaus; PP muaj qhov tsis zoo ntawm qhov kub thiab txias tsis kam, siab molding shrinkage, thiab cov khoom tsis raug.
1.2 Kev ua haujlwm:
1.2.1 Kev tsim cov yam ntxwv:
1.2.1.1 Cov khoom siv Crystalline muaj qhov nqus dej tsawg thiab tuaj yeem raug yaj thiab tawg. Lawv yog cov nquag mus decomposition nyob rau lub sij hawm ntev kev sib cuag nrog kub hlau.
1.2.1.2 Cov kua dej zoo heev, nrog tus nqi dhau ntawm kwv yees li 0.03mm.
1.2.1.3 Cov cua txias ceev yog ceev, thiab cov txheej txheem pouring thiab cua txias yuav tsum dissipate cua sov maj mam.
1.2.1.4 Cov txheej txheem shrinkage ntau yog loj, tus nqi shrinkage yog loj, thiab nws yog nquag mus shrinkage, dents, deformation, thiab muaj zog directionality.
1.2.1.5 Ua tib zoo saib xyuas qhov kub thiab txias. Cov kev taw qhia yog pom tseeb thaum cov khoom siv kub qis, tshwj xeeb tshaj yog nyob rau qhov kub thiab txias. Cov khoom yas nrog pwm kub hauv qab 50 degree tsis ci thiab ua rau tsis zoo fusion thiab ntws cov cim; Warping thiab deformation yog feem ntau tshwm sim saum 90 degree.
1.2.1.6 Cov khoom yas yuav tsum muaj cov phab ntsa tuab tuab, tsis txhob muaj qhov tsis zoo thiab cov kaum ntse ntse kom tsis txhob muaj kev ntxhov siab.
1.2.1.7 Txhaj pwm thiab txhaj tshuaj molded khoom:
A. Qhov tsawg kawg nkaus demolding lub kaum sab xis yog 30 '-1 degree .
B. Qhov tsawg kawg nkaus phab ntsa thickness yog 0.85mm.
C. Kev sib raug zoo ntawm cov txheej txheem thiab phab ntsa thickness: qhov twg t yog phab ntsa thickness (mm) thiab l yog txheej txheem (mm).
D. Yuav tsum muaj qhov sib npaug ntawm qhov tsis pub tsawg dua 0.5-1.mm ntawm qhov sib txuas ntawm cov khoom yas.
E. Cov phab ntsa tuab ntawm cov khoom yas yuav tsum zoo ib yam li qhov ua tau los tiv thaiv cov txheej txheem shrinkage, warping, thiab deformation ntawm cov khoom.
1.3 Kev txhaj tshuaj molding txheej txheem:
1.2.3.1 Qhuav kub thiab lub sij hawm: Sealing hnab PP tuaj yeem txhaj yam tsis tau ziab, preheating kub thiab sij hawm: 80-100 degree /1-2 teev.
1.2.3.2 chim kub: 200-230 degree .
1.2.3.3 Nozzle kub: 180-190 degree .
1.2.3.4 Pwm kub: 20-60 degree .
1.2.3.5 Txhaj siab: Tsawg dua lossis sib npaug rau 69-98Mpa
1.2.3.6 Lub sijhawm txhaj tshuaj (nrog rau lub sijhawm tuav lub zog): Tsawg dua lossis sib npaug rau 20-60S.
1.2.3.7 Lub sijhawm txias: Tsawg dua lossis sib npaug rau 20-90S.
1.2.3.8 Screw ceev: Tsawg dua los yog sib npaug rau 80rpm.
2. PE khoom yas:
2.1 Txheej txheem cej luam: Polyethylene, abbreviated li PE hauv lus Askiv, muaj peb hom: low-density polyethylene (LDPE), high-density polyethylene (HDPE), thiab linear low-density polyethylene (LLDPE). Nws cov molecular muaj pes tsawg leeg yog tib yam, tab sis cov txheej txheem synthesis txawv.
2.1.1 LDPE, tseem hu ua high-pressure polyethylene, yog cov khoom siv mis nyuj dawb nrog qhov ntom ntawm 0.91 txog 0.93g/cm3 thiab crystallinity ntawm 65 feem pua ​​​​rau 75 feem pua. LDPE muaj cov txheej txheem zoo, cov khoom siv nruab nrab, tab sis muaj kev cuam tshuam zoo; Tsawg kub tsis kam, tab sis tsis tshua muaj embrittlement kub; Zoo ib puag ncig tiv thaiv thiab zoo heev rwb thaiv tsev. LDPE tsis zoo adhesion thiab luam tawm, feem ntau yog siv rau kev ua liaj ua teb tsev xog paj zaj duab xis, yas zaj duab xis, lub teeb ntim zaj duab xis, thiab niaj hnub txhaj tshuaj molding khoom.
2.1.2 HDPE, tseem hu ua low-pressure ethylene, muaj qhov zoo ib yam li LDPE, nrog qhov ceev ntawm 0.92 txog 0.97g/cm3 thiab crystallinity ntawm 80 feem pua ​​​​rau 95 feem pua. . Cov khoom siv hluav taws xob thiab cov cua sov ntawm HDPE yog me ntsis zoo dua li LDPE, thiab cov rigidity yog ntau dua LDPE. Lwm yam khoom yog qhov tseem ceeb tib yam li LDPE. HDPE yog tsuas yog siv rau hnyav ntim zaj duab xis, woven hnab, torn films, ntim siv, txhaj tshuaj molded khoom (xws li turnover thawv), ntau yam nyuaj kav, hollow khoom, nuv ntses nets, thiab lwm yam.
2.1.3 LLDPE yog lub cim thib peb polyethylene nrog qhov ntom ntawm 0918-- -0.96g/cm3. Ntxiv rau qhov muaj cov khoom ntawm LDPE thiab HDPE, nws lub zog tensile, lub zog tsim kua muag, ib puag ncig kev ntxhov siab tawg tsis kam, tsis kub tsis kam, cuam tshuam tsis kam, toughness, rigidity, kub tsis kam, roj tsis kam, puncture resistance, thiab transparency yog tag nrho superior rau LDPE. thiab HDPE. LLDPE yog qhov nyuaj rau kev ua haujlwm ntau dua li LDPE thiab HDPE, thiab feem ntau yog sib xyaw nrog HDPE lossis LDPE rau kev ua haujlwm lossis ntxiv nrog kev pabcuam ua haujlwm. Feem ntau yog siv los ua cov yeeb yaj kiab ultra-thin, woven tapes, hollow khoom, txhaj tshuaj molded cov khoom, thiab cov kav dej.
2.2 Kev ua haujlwm:
2.2.1 Cov yam ntxwv ua haujlwm ntawm PE: Siv HDPE ua piv txwv:
2.2.1.1 Cov khoom siv Crystalline uas tsis tshua muaj dej nqus;
2.2.1.2 Zoo flowability, nrog ib tug overflow tus nqi ntawm 0.02mm, thiab flowability rhiab heev rau siab.
2.2.1.3 Melt cracking yuav tshwm sim, thiab cracking yuav tshwm sim nyob rau hauv kev sib cuag nrog organic solvents.
2.2.1.4 Yog tias qhov txias txias qeeb, nws raug nquahu kom teeb tsa cov khoom siv txias txias, thiab cov pwm yuav tsum muaj qhov cua txias.
2.2.1.5 Loj shrinkage ntau, loj shrinkage nqi, pom tseeb directionality, yooj yim deformation, warping, crystallinity, thiab pwm txias tej yam kev mob muaj ib tug tseem ceeb cuam tshuam rau shrinkage. Pwm qhov kub thiab txias yuav tsum tau tswj kom muaj qhov sib xws thiab ruaj khov txias.
2.2.1.6 Kev txhaj tshuaj siab yuav tsum tau siv, nrog rau cov khoom siv kub thiab txias, ua kom nrawm nrawm, thiab ruaj khov txaus.
2.2.1.7 Nws tsis raug nquahu kom siv lub qhov rooj ncaj nraim, vim nws tuaj yeem ua rau muaj kev ntxhov siab sab hauv lossis ua rau tsis sib xws, kev taw qhia pom tseeb, thiab nce deformation. Kev saib xyuas yuav tsum tau them rau kev xaiv txoj haujlwm ntawm qhov chaw noj mov kom tsis txhob shrinkage thiab deformation.
2.2.1.8 Mos thiab yooj yim rau demould, yas qhov chaw nrog ntiav sab grooves tuaj yeem raug demoulded.
2.2.1.9 Txhaj pwm thiab txhaj tshuaj molded khoom:
A. Qhov tsawg kawg nkaus demolding lub kaum sab xis yog 30 '-1 degree .
B. Qhov tsawg kawg nkaus phab ntsa thickness yog 0.6mm.
C. Kev sib raug zoo ntawm cov txheej txheem thiab phab ntsa thickness: qhov twg t yog phab ntsa thickness (mm) thiab l yog txheej txheem (mm).
D. Yuav tsum muaj qhov sib npaug ntawm qhov tsis pub tsawg dua 0.5-1.mm ntawm qhov sib txuas ntawm cov khoom yas.
E. Cov phab ntsa tuab ntawm cov khoom yas yuav tsum zoo ib yam li qhov ua tau los tiv thaiv cov txheej txheem shrinkage, warping, thiab deformation ntawm cov khoom.
2.2.3 Cov txheej txheem txhaj tshuaj molding cov xwm txheej: (Kev siv lub zog qis PE ua piv txwv)
2.2.3.1 Qhuav kub thiab lub sij hawm: kaw PE hnab tuaj yeem txhaj tshuaj yam tsis tau ziab, preheating kub thiab sij hawm: 70-80 degree /1-2h.
2.2.3.2 Barrel kub: 180-220 degree .
2.2.3.3 Nozzle kub: 150-180 degree .
2.2.3.4 Pwm kub: 30-60 degree .
2.2.3.5 Txhaj siab: 70-100Mpa
2.2.3.6 Lub sijhawm txhaj tshuaj (nrog rau lub sijhawm tuav lub zog): Tsawg dua lossis sib npaug rau 15-60S.
2.2.3.7 Lub sijhawm txias: Tsawg dua lossis sib npaug rau 15-50S.
2.2.3.8 Screw ceev: Tsawg dua los yog sib npaug rau 30-60rpm. Txhaj Molding Training Website www.injtrain.com www.injtrain.com www.injtrain.com
3. PVC yas khoom:
3.1 Txheej txheem cej luam: PVC, abbreviated li PVC hauv lus Askiv, yog ib tug dawb los yog lub teeb daj hmoov nrog ib tug ceev ntawm 1.35-1.45g/cm3. Nws cov khoom tuaj yeem muab faib ua cov khoom muag muag thiab tawv nyob ntawm cov ntsiab lus plasticizer. Feem ntau, 0-5 qhov chaw ntawm cov khoom siv yas yog cov khoom tawv, 5-25 qhov chaw yog cov khoom lag luam ib nrab, thiab ntau tshaj 25 qhov chaw yog cov khoom muag muag. Hom 4, 5, 6, 7, thiab 8 rau xoob XS-1-8 cov khoom nyuaj
PVC cob
Hom 1, 2, thiab 3 rau compact XJ-1-8 cov khoom muag muag
Piv nrog rau PE, PVC muaj qhov zoo xws li siab hardness, hnav tsis kam, corrosion kuj, siab zog, thiab nplaim taws, thiab yog dav siv los hloov hlau thiab ntoo. PVC yog qhov nyuaj rau kev ua haujlwm vim nws qhov kub thiab txias yog ze rau qhov kub decomposition. Yog li ntawd, plasticizers thiab stabilizers feem ntau ntxiv thaum lub sij hawm ua, nrog stabilizers ntxiv los ntawm li 7 qhov chaw hauv cov khoom tawv thiab 2-4 qhov chaw hauv cov khoom muag muag. PVC yog tsuas yog siv rau kev tsim ntau yam yeeb yaj kiab, cov laug cam, nplooj ntawv, kav, profiles, hollow tshuab fwj, cables, ntau yam kev txhaj tshuaj molded cov khoom, nrog rau cov tawv tawv, tawv hauv pem teb, yas lined cov khoom ua si, thiab lwm yam.
3.2 Kev ua haujlwm:
3.2.1 Cov yam ntxwv ua haujlwm: (Nqe PVC nruj ua piv txwv)
3.2.1.1 Cov ntaub ntawv tsis zoo muaj qhov nqus dej tsawg, tab sis txhawm rau txhim kho fluidity thiab tiv thaiv qhov tshwm sim ntawm npuas, lawv yuav tsum tau qhuav ua ntej.
3.2.1.2 Tsis zoo flowability thiab yooj yim decomposition, tshwj xeeb tshaj yog nyob rau hauv high kub thaum nws decomposes nrog hlau thiab tooj liab hlau, nrog ib tug decomposition kub ntawm 200 degree. Muaj corrosive thiab irritating gases thaum lub sij hawm decomposition.
3.2.1.3 molding kub ntau yam me me, thiab cov khoom kub yuav tsum tau nruj me ntsis tswj.
3.2.2.2 Txhaj pwm thiab txhaj tshuaj molded khoom:
A. Cov txheej txheem pouring ntawm pwm yuav tsum yog tuab thiab luv, lub rooj vag seem yuav tsum loj, thiab yuav tsum tsis txhob muaj cov ces kaum tuag los yog cov ntaub ntawv stagnation. Cov pwm yuav tsum tau txias, thiab nws qhov chaw yuav tsum yog chrome plated los yog ua los ntawm cov khoom siv corrosion-resistant.
B. Yam tsawg kawg nkaus demolding lub kaum sab xis: Cov khoom muag PVC: 30 '- -1 degree ; Hard PVC khoom 50 '- -2 degree .
C. Qhov tsawg kawg nkaus phab ntsa thickness yog 0.6mm.
D. Kev sib raug zoo ntawm cov txheej txheem thiab phab ntsa thickness: qhov twg t yog phab ntsa thickness (mm) thiab l yog txheej txheem (mm).
E. Yuav tsum muaj qhov sib npaug ntawm qhov tsis pub tsawg dua 0.5-1.mm ntawm qhov sib txuas ntawm cov khoom yas.
3.2.3 Kev txhaj tshuaj molding txheej txheem: (Kev siv tawv PVC ua piv txwv)
3.2.3.1 Qhuav kub thiab lub sij hawm: Feem ntau, ziab tsis tsim nyog, tab sis yuav tsum tau preheating. Preheating kub thiab sijhawm: 70-90 degree /4-6 teev.
3.2.3.2 Barrel kub: 170-190 degree .
2.2.3.3 Nozzle kub: kho raws li cov khoom, tab sis tsis siab tshaj 190 degree.
2.2.3.4 Pwm kub: 30-60 degree .
2.2.3.5 Txhaj siab: 78--127Mpa
2.2.3.6 Lub sijhawm txhaj tshuaj (nrog rau lub sijhawm tuav lub zog): Tsawg dua lossis sib npaug rau 15-60S.
2.2.3.7 Lub sijhawm txias: Tsawg dua lossis sib npaug rau 15-50S.
2.2.3.8 Screw ceev: Tsawg dua los yog sib npaug rau 28rpm.
4. PS cov khoom siv yas:
4.1 Txheej txheem cej luam: Polystyrene, abbreviated li PS hauv lus Askiv, yog ib yam khoom tsis muaj xim thiab pob tshab granular nrog siab hardness. Cov khoom muaj hlau tapping suab rau hauv av, thiab nws qhov ceev yog 1.05g / cm3, nrog cov qauv qauv. Lub ntsiab kom zoo dua ntawm PS yog nws cov pob tshab zoo, nrog rau kev xa tawm ntawm 88 feem pua ​​-92 feem pua ​​​​thiab qhov ntsuas qhov ntsuas ntawm 1.59 feem pua ​​-1.60 feem pua. PS muaj cov rwb thaiv tsev zoo, qhov siab ruaj khov, thiab yooj yim rau cov duab thiab xim. PS muaj kev hnav tsis zoo, cuam tshuam tsis kam, huab cua tsis kam, thiab kub tsis kam. PS feem ntau yog siv rau cov yas ua npuas ncauj, ua raws li PS ua npuas ncauj board, ua npuas ncauj ntawv, txhaj tshuaj molding khoom, optical instrument accessories, optical iav, lampshade, hluav taws xob accessories, ntsuas qhov chaw, thiab lwm yam.