Yuav ua li cas kho cov txheej txheem tsis zoo ntawm kev txhaj tshuaj molding tshuab los daws cov khoom tsis xws luag?

Txhawm rau kho cov txheej txheem tsis xws luag rau kev txhaj tshuaj molding, nws yog qhov tsim nyog los ua kom zoo hloov kho cov tswv yim thiab cov ntsiab lus ua haujlwm los ntawm cov neeg tsis xws luag:
Kuv . txheej txheem parameter hloov kho txoj kev npaj los ntawm kev tsis xws luag hom
1. Flash (burrs)
Siab tsis:
Txhaj tshuaj nyem: txo los ntawm 10% -20 mpa mpa cia ntawm cov khoom siv pwm nrog molten cov khoom {}}
Clamping ceral: xam cov pob zeb tsawg kawg nkaus raws li qhov chaw ua haujlwm ntawm cov khoom lag luam (cov kab ke} mpa cia ntawm coring ke txiv ntseej) .
Qhov kub thiab qhov kub tshaj tawm:
Barrel / Pwm Kub: txo los ntawm 5-10℃(xws li txo cov khoom siv ntawm cov kev pheej hmoo ntawm kev pheej hmoo ntawm overflow {}}
Cov tsis ceev:
Kev Txhaj Tshuaj Ceev: Txo cov kev faib ua feem ntawm kev txhaj tshuaj ntau dua (xws li 60% ceev hauv ntu nrawm ua rau pwm nthuav dav ua rau pwm nthuav dav {5}
2.} shrinkage (shrinkage muaj kev nyuaj siab)
Siab thiab lub sijhawm:
Tuav Siab: Nce mus rau 60% {{-80 mpa}}}}}} {}-walled cheeb tsam {}}
Txhaj tshuaj ntim: nce 5% {{-10% (kho los ntawm kev txhaj tshuaj tiv thaiv kab mob tsis txaus) kom tsis txhob muaj lub ntsej muag tsis txaus) kom tsis txhob muaj roj tsis txaus ua tiav ....
Qhov kub thiab qhov kub tshaj tawm:
Pwm kub: nce {{10-20℃(tshwj xeeb tshaj yog cua sov-welled ntws thiab shrinkage nyiaj.
{{03. Tsis muaj cov khoom siv (luv txhaj tshuaj, tsis muaj txhij txhua)
Kub thiab nrawm:
Churren Kub: nce los ntawm 5-15℃(xws li los ntawm 200 degree}}} degree) los txhim kho lub suab paj nruag. Pwm kub yog nce los ntawm 10-20℃ib txhij rau kom txo tau txhaws {}}
Kev Txhaj Tshuaj Ceev: Ua kom muaj feem ntawm cov kev sib tw nrawm (xws li ntawm 50% rau 70% {15} {{{{}}}
Siab tsis:
Txhaj tshuaj nyem: nce los ntawm 10% -20}}% (xws li los ntawm 80mpa}} mpa mpa mpa cia rau nkag mus; rov qab siab yog tsim nyog nce ({5-10 mpa mpa mpa) kom ntseeg tau tias qhov ntom ntom {{5 5}}
{{04. qhov tsis xws luag (nyiaj sawb, txaus, cov pob dub)
Silver Streaks (cua Streaks):
Cov Khoom Siv Raw Kom Qhuav: Hygroscopic Cov Ntaub Ntawv (xws li PA, PC) tau qhuav kom paub cov ntsiab lus (LWEm)}} degree) .
Kev Txhaj Tshuaj Ceev: Tsawg-ceev ncuav nyob rau hauv sab xub ntiag (30%-40% ceev) kom tsis txhob muaj huab cua sov nrawm; Kev nrawm yuav yog kev nce qib kom zoo dua hauv seem nram qab los xyuas kom du filling {{4}
Flow Marks (cov khoom txias khoom siv):
Barrel / pwm kub: nce {5-10℃los txo cov viscosity ntawm yaj; siv kev txhaj tshuaj ntau theem (qis dua-rooj vag, qhov nrawm nrawm folding kab noj hniav) kom tiv thaiv cov hws ntawm lub rooj vag .
Dub Pob / Scorch Cim:
Rov qab siab thiab lub sijhawm melting: txo rov qab lub siab (xws li ntawm 20Mpa kom luv, thiab tsis txhob siv cov khoom siv ntawm cov roj av hauv lub thoob; siv cov khoom ntxuav kom huv rau lub thoob {23-5}}} lub sij hawm ua ntej nres {}}
5. deformation / warping
Cua txias thiab siab:
Lub sijhawm txias: txuas ntxiv los ntawm 10%-20% (xws li cov khoom txias tshaj li ntawm 5L / min).
Siab tuav tsis muaj: txo qis siab tuav siab (rau 50% {% ntawm kev txhaj tshuaj nias sab hauv los ntawm kev sib dhos ntau dhau.
Cov tsis ceev:
Kev Txhaj Tshuaj Ceev: Siv kev txhaj tshuaj nruab nrab-ceev (50%-60} kev kub siab), tshwj xeeb yog kom txo tau cov khoom sib txawv ntawm kev ua kom tsis muaj kev cuam tshuam nrog kev sib cais tsis tau ua ke {}}
6. bubbles / voids
Cov Khoom Siv Raw Thiab Siab:
Kev kho kom qhuav: nruj me ntsis tswj cov feem ntawm cov khoom siv ua rov qab (qis dua lossis sib npaug rau kev paug los ntawm cov khoom siv tsis sib xws los ntawm cov khoom siv tsis sib xws Hygroscopic raw cov ntaub ntawv tau qhuav rau ib qho chaw ntswj ntawm tsawg dua lossis sib npaug {{1} degree, thiab cov ntxaij kom lim impurities.
Siab tuav tsis muaj: Ua kom lub siab tuav siab (70% {1} {{% ntawm kev txhaj tshuaj siab), compact lub suab thiab ntiab tawm cov roj {}}
Cov tsis ceev:
Kev Txhaj Tshuaj Ceev: Tsawg nrawm hauv ntu pem hauv ntej (30% {%) kom tiv thaiv kev ua kom muaj kev nce qib cua kom paub meej tias cov txheej txheem sib sau ua ke.
Ii {. Cov ntsiab cai dav rau kev kho cov txheej txheem tseem ceeb
1. kub tswj
Churrel kub: Teeb raws li cov khoom siv Raw Melt Performance index (Mi), qhov kub thiab txias rau ntawm 10)
Pwm kub: Cov pwm kub ntawm cov ntaub ntawv siv tshuab crystalline (xws li PE thiab PP) yuav tsum muaj ntau dua los yog sib npaug rau 50℃los txhawb crystallization; Lub pwm kub ntawm cov khoom tsis yog-crystalline (xws li PS thiab ABS) yog {}}}℃los txhim kho filling {{5 5 5 5}
2.} kev tswj siab
Txhaj tshuaj siab: pib teeb tsa rau 60% -70}}}} Cov kab noj hniav pom zoo kom tsuas yog sau cov kab noj hniav (zam dhau flash).
Tuav Siab: Feem ntau 50% {-80}} Kev txhaj tshuaj ntawm lub rooj vag ("kev tuav lub sijhawm mus rau lub sijhawm luv luv thaum shrinkage yog tsis muaj kev txhim kho).
3. ceev thiab sijhawm
Kev tswj hwm theem ntau: Segmented tswj (xws li tsawg-ceev over-wind-ceev filling) kom tsis txhob muaj kev kub ceev rau ntawm cov neeg siv ceev nrawm nrawm
Lub sijhawm txias: Tus qauv yog tias cov khoom tau ntiab tawm yam tsis muaj kev cuam tshuam nrog kev sib txuas nrog "(piv txwv li cov khoom kub thiab txias. {
{{0 {}} txhaj ntim thiab rov lub siab
Txhaj tshuaj ntim: Khaws ib 5% -10}}% tsis loj dua los yog sib npaug nrog 5 hli) kom tsis txhob ntsia hlau idling .
Rov qab siab: Sab nraub qaum cov ntaub ntawv dav dav (xws li Abs) yog {}} mpa}}}}}} {} {{1} .
III {.} Txoj kev hloov kho tshiab thiab cov txheej txheem pov thawj
Kho qhov chaw: txiav txim siab cov hom tsis zoo (xws li qhov kev sib txawv (cov teeb meem saum npoo av, kev soj ntsuam thawj zaug lossis kev ntsuas xyuas cov pwm lossis cov pa yeeb tshuaj ntsuam.
Parameter fine-tuning: Adjust a single parameter each time (such as temperature ±5℃, pressure ±10%), and record the defect changes before and after the adjustment to avoid difficulties in tracing problems caused by simultaneous adjustment of multiple parameters.
Txheej Txheem Rai Qhov Ncauj Lus: Raws li cov kev ntsuas siab, qhov kev ntsuas tau ua rau cov khoom siv kub 520) ± 5 degree) {{5}.
Cov Qauv Cov Ntaub Ntawv: Tsim kom muaj cov qauv khoom siv rau cov khoom siv
Iv . Hloov cov ntsiab lus rau cov ntaub ntawv tshwj xeeb
Iav Fiber Reints (xws li GF-ABS): Txo cov kev txhaj tshuaj ceev (40% {}60-80℃kom tsis txhob muaj saum npoo ntoo floating fibers; Lub siab tuav yog qis me ntsis (50%-60}}}% ntawm kev txhaj tshuaj siab.
Cov ntaub ntawv pob tshab (xws li PMMA, PC): Hloov pauv tsawg dua los yog sib npaug rau kev ua kom tiav nyiaj nruab nrab (50% {1} {}}
Cov khoom siv cua sov (xws li PVC, POM) yog {{}}}} qhov muag tau qis dua los yog txiav txim siab los tsim cov pob dub {}}
Los ntawm cov laj thawj ntawm "ib qho ntsuas tsis muaj txiaj ntsig → Kev Txiav Txim Siab Txog Kev Txiav Txim Siab, thiab tom qab ntawd ua kom zoo dua los ntawm cov khoom lag luam pwm kom txog thaum kawg tsim cov phiaj xwm txheej txheem txheej txheem qauv txheej txheem.}