Kev txhaj tshuaj molding cov txheej txheem ntawm cov theem yas feem ntau suav nrog plaub yam ntxwv ua tiav cov khoom lag luam zoo nkauj, thiab plaub theem yog ua tiav cov txheej txheem txuas ntxiv {}}
1.} sau theem
Txhaws yog thawj kauj ruam nyob rau hauv tag nrho kev txhaj tshuaj molding {{lub sij hawm yuav tau sau moulding thiab kev txhaj tshuaj, lub sijhawm moulding yog tsim kom muaj ntau lub sijhawm lossis kev txhaj tshuaj nrawm yog muaj ntau yam mob.
Kev Tawm Tsam Tshaj Tawm
Tus nqi shear yog qhov siab thaum lub sijhawm nrawm nrawm, thiab viscosity ntawm cov yas txo qis vim tias cov nyhuv shear therming nyhuv; Lub zos cov nyhuv muaj cua sov kuj tseem yuav ua rau cov theem me me, thiab yog qhov kev coj ua yooj yim, thiab cov nyhuv txias rau ntawm daim nyias nyias
Tsawg-ceev filling
Thaum tshav kub conduction electing qis, cov nyhuv shear yog qhov muaj ntau, thiab cov cua sov kom qeeb, thiab cov cua sov me me ntawm cov khoom siv cua sov, thiab cov cua sov thicker, uas ntxiv nce cov kev ntws tsis kam ntawm lub phab ntsa thinner .
Vim yog tus ciav dej ntws, cov ntaub pua tsev yas hauv pem hauv ntej ntawm nthwv dej pem hauv ntej {yog li ntawd, thaum ob lub polymer sib ntsib ntawm kev tiv tauj saum npoo av yog sib piv rau ib leeg; Coupled nrog cov khoom sib txawv ntawm ob lub suab nrov (qhov chaw nyob sib txawv ntawm cov khoom sib tshuam ntawm Melt sib tshuam yog tsis zoo.
When the parts are placed at an appropriate angle under light and observed with the naked eye, it can be found that there are obvious joint lines, which is the formation mechanism of the weld mark. The weld mark not only affects the appearance of the plastic part, but also easily causes stress concentration due to the loose microstructure, which reduces the strength of the part and causes fracture.
Feem ntau hais lus, Weld cov cim tsim nyob rau hauv qhov kev kub siab muaj lub zog zoo dua, thiab muaj peev xwm nkag rau hauv qhov kev kub ntxhov siab, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab tuaj yeem nkag siab zoo dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab tuaj yeem nkag siab zoo dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm loj dua, thiab muaj peev xwm nkag mus rau hauv ib qho siab tshaj plaws, uas muaj zog ntxiv, ntawm qhov tsis sib xws, hauv cheeb tsam kub tsawg, chav Weld tsis zoo .
2.} tuav lub siab theem
Txoj haujlwm ntawm kev tuav siab theem yog kom txuas ntxiv siv siab, ua kom muaj zog ntawm cov yas (ua kom muaj qhov sib zog ua ke, ntxiv rau kev siv lub zog ua kom tiav, nce ntxiv vim tias me ntsis, thiab qhov txaus ntshai ntawm lub yas kuj yog qeeb . qhov ntws ntawm lub sijhawm no yog hu ua Holding Flow {}}}
Vim hais tias nyob rau hauv tuav lub siab theem, cov yas yog txias thiab cov khoom siv ntom ntom nti ntxiv, thiab cov khoom siv ntom ntom nti. Lub vag muaj kev ruaj khov thiab kaw . Nyob rau lub sijhawm no, pwm kab noj hniav siab hauv kev tuav siab theem nce mus txog qhov siab tshaj plaws {}}
Thaum lub siab tuav theem, vim muaj kev kub siab, cov yas qhia qee yam ntawm cov khoom siv siab, cov yas yog denser thiab muaj qhov ceev dua; Nyob rau hauv qhov chaw siab qis, yas yog xoob thiab muaj qhov qis dua, yog li qhov ceev faib cov kev faib tawm nrog txoj haujlwm thiab sijhawm.
Thaum lub sij hawm lub siab tuav cov txheej txheem, tus nqi txaus yog tsawg kawg nkaus, thiab cov dej tsis ua yeeb yam ib lub luag haujlwm tseem ceeb; lub siab yog qhov tseem ceeb cuam tshuam rau lub siab tuav cov txheej txheem {}}} tau muaj cov pwm sib zog, thiab cov yas tau ruaj khov nyob rau lub sijhawm no rau kev xa khoom nruab nrab.
Lub siab nyob rau hauv pwm kab noj hniav yog kis tau rau cov pwm phab ntsa sib kis tau rau cov pwm hluav taws xob, thiab muaj qhov tsim nyog qhib cov pwm, uas muaj txiaj ntsig rau kev ua pa ntawm cov pwm; Tab sis yog tias cov pwm nthuav dav loj dhau lawm, nws yog qhov yooj yim los ua rau burrs, txeej, thiab txawm qhib cov khoom lag luam ntawm cov khoom siv pwm ....
Yog li ntawd, thaum xaiv lub tshuab txhaj tshuaj molding tshuab nrog kev txhaj tshuaj loj kom tiv thaiv pwm thiab ua kom muaj kev kub siab {}}
3.} txias theem
Kev txhaj tshuaj molding pwm, tus tsim ntawm cov khoom txias yog qhov tseem ceeb heev rau cov khoom siv hluav taws xob, ua kom cov khoom siv sib xyaw ua ke, txhim kho kev txhaj tshuaj yas kom muaj cov khoom lag luam sib xyaw thiab Txo cov nqi .
Ib qho kev tsim qauv tsim kom txias yuav ntev lub sijhawm siv lub sijhawm thiab cov nqi nce ntxiv; tsis xwm yeem yuav ua rau muaj kev tawm tsam thiab deformation yas ntawm cov yas yas {}}
Raws li cov kev sim, cov cua sov nkag mus rau hauv cov roj hmab dej txias thiab kev hloov pauv mus rau cov pa roj hmab kom sov li, thiab tom qab ntawd nqa tawm ntawm cov khoom tawg los ntawm kev lees paub tshav kub . Qhov dej txias me me uas tsis tau nqa tawm hauv cov pwm, thiab tsis ncaj rau hauv huab cua tom qab hu rau sab nraud ntiaj teb {}}
Lub voj voog moulding ntawm kev txhaj tshuaj moulding muaj lub sijhawm ntim cov khoom siv, txog li lub sijhawm, kev sib tw lub sijhawm, lub sijhawm ua kom txias, thaum muaj cov khoom siv kub, txias rau qhov ntsuas kub tshaj qhov kub ntawm cov khoom siv yas los tiv thaiv cov khoom siv yas vim yog cov rog sab nraud thaum lub sijhawm rhuav tshem.
Qhov xwm txheej cuam tshuam rau cov khoom txias txias ntawm cov khoom lag luam yog:
Yas Khoom Tsim . Cov Khoom Siv Yas, lub sijhawm txias tshaj plaws ntawm cov khoom siv yas, lub sijhawm ntev tshaj plaws rau cov khoom siv roj hmab uas muaj zog, lub sijhawm ntev tshaj plaws Cov khoom lag luam yas ua ob npaug, lub sijhawm txias nce los ntawm 4 zaug.
Pwm cov ntaub ntawv thiab lawv cov hau kev txias {{0} Cov ntaub ntawv ntim khoom, nrog cov khoom siv hluav taws xob, nrog rau lub sijhawm txias dua, thiab lub sijhawm txias txias .
Cua txias Dej Yeeb Nkab Qauv . Lub taub dej txias dua thiab cov khoom txias dua thiab lub sijhawm txias txias.
Coolant Flow tus nqi . Cov dej txias loj dua (feem ntau cov dej txias txias dua), qhov zoo dua cov dej txias txias tuaj yeem nqa tau tshav kub kub los ntawm kev lees paub.
Lub zog txias . Lub viscosity thiab thermal conductivity, qhov siab dua qhov kub, thiab qhov zoo dua cov khoom txias txias, thiab qhov zoo dua qhov txias txias {}}
Kev Xaiv Yas . Daim ntaub ntawv yas ntawm cov yas, yog li cov cua sov yooj yim rau cov cua sov, qhov yooj yim dua cov cua sov, thiab lub sijhawm luv luv lub sijhawm txias Yuav tsum .
Ua Parameter Chaw . Qhov siab dua cov khoom kub, qhov siab dua qhov ntsuas kub, thiab lub sijhawm txias ntev dua.
Cua txias system tsim cov cai:
Cov qauv tsim txias cov channel yuav tsum ua kom muaj kev phom sij thiab txias nrawm .
Lub hom phiaj ntawm kev tsim lub tshuab txias txias yog tswj kom tsim nyog thiab ua kom muaj zog ntawm lub puab tsaig {{} {{.
Thaum tsim cov qauv tsim kom txias, cov tsim pwm tsim cov qauv ntawm cov yas: qhov chaw txaus thiab cov dej ntws tawm ntawm cov khoom siv hluav taws xob, cov dej ntws tawm ntawm cov khoom siv cua sov ntawm lub zog ntawm cov khoom txias (
4.}} lov nrhav theem
Kev hais tias cov kauj ruam kawg hauv kev txhaj tshuaj molding {{}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} ★} ★} Cov khoom lag luam tsis txaus ntseeg, ua rau muaj ob qho khoom lag luam tsis sib xws stripper demolding . Thaum tsim cov qauv tsim nyog raws cov qauv ntawm cov khoom lag luam kom ntseeg tau cov khoom lag luam zoo.
Rau cov pwm uas siv Ejector yuav tsum tau teem tseg rau qhov uas muaj qhov sib sib zog nqus thiab kev puas tsuaj rau cov khoom siv yas thiab cov khoom siv pob tshab uas tsis pub laub pas nrig cov cim . Cov yam ntxwv ntawm cov txheej txheem no yog cov loj thiab uniform doiled quab yuam, thiab tsis muaj tseeb realidual cov cim {}}
