Cov ntsiab lus ntawm kev txhaj tshuaj molding thiab cov yam ntxwv ntawm kev ua haujlwm zoo tib yam thiab molding

Kev txhaj tshuaj molding yog qhov kev txhaj tshuaj ceev ceev ntawm cov yas yaj mus rau hauv qhov kaw pwm kab noj hniav nyob rau hauv kev kub siab, ua raws li kev txias thiab shaping kom tau cov khoom yas uas zoo ib yam li cov pwm kab noj hniav.
Kev txhaj tshuaj molding thiab molding yuav tsum ua kom tau raws li ob yam tsim nyog rau molding: yas yuav tsum tau txhaj rau hauv kab noj hniav ntawm Txhaj pwm tsim nyob rau hauv lub xeev molten, thiab cov yas txhaj tshuaj yaj yuav tsum muaj txaus siab thiab ntws ceev kom puv cov kab noj hniav ntawm pwm. Yog li ntawd, kev txhaj tshuaj molding thiab molding yuav tsum muaj cov haujlwm tseem ceeb ntawm cov yas yas, yaj txhaj tshuaj thiab siab tswj molding.
Yas plasticization: thaum lub sij hawm plasticization txheej txheem ntawm kev txhaj tshuaj molding, cov khoom yas txuas ntxiv mus rau pem hauv ntej raws cov kev taw qhia ntawm cov ntsia hlau zawj los ntawm kev ua haujlwm ntawm cov ntsia hlau tig. Tom qab cua sov, compaction, shearing thiab sib tov ntawm cov ntsia hlau threads, lawv yog rhuab thiab hloov mus rau hauv ib tug viscous yas yaj nrog uniform ntom, viscosity, muaj pes tsawg leeg thiab ruaj khov tis.
Kev txhaj tshuaj molding txheej txheem: Cov yas yas yaj yog khaws cia rau hauv cov khoom cia ntawm lub tshuab chim. Thaum txhaj tshuaj molding, cov ntsia hlau txav axially. Nyob rau hauv kev txhaj tshuaj siab ntawm cov ntsia hlau, cov yas yaj tau ntws los ntawm lub nozzle nruab rau hauv pem hauv ntej ntawm lub tshuab chim, pwm pouring system, thiab lwm yam ntawm ib tug npaum li cas thiab txhaj rau hauv lub pwm kab noj hniav ntawm cov pwm.
Txias thiab shaping txheej txheem: cov yas yaj txhaj rau hauv pwm kab noj hniav ntawm Txhaj pwm kev tsim kho overcomes ntau yam ndlwg tsis kam thiab nyob rau hauv pwm kab noj hniav. Cov yas yaj ntim nrog cov pwm kab noj hniav yog raug rau lub siab loj los ntawm pwm kab noj hniav. Lub siab no muaj lub siab nyiam tsav cov yas yaj rov qab mus rau lub thoob. Cov nyhuv txias ntawm cov pwm kab noj hniav ua rau cov yas yaj kom txias thiab ntsws.
Nyob rau lub sijhawm no, kev txhaj tshuaj molding ntsia hlau txuas ntxiv muab lub zog kom cov yas yaj ntim cov pwm kab noj hniav tsis muaj rov qab, thiab tsim nyog ntxiv cov yas yaj rau hauv pwm kab noj hniav kom puv qhov chaw shrinkage hauv pwm kab noj hniav kom txog thaum cov yas yaj maj mam txias thiab solidifies rau hauv cov khoom.
Cov ntsiab lus txiav txim siab ua tiav lossis tsis ua tiav, uas tau dhau los ua tus qauv raws li txhua qhov kev lag luam. Niaj hnub no, qhov tseeb ntawm cov khoom yog nce siab, thiab cov kev xav tau zoo tau nce zuj zus. Qhov no yuav tsum muaj kev tswj xyuas nruj thiab saib xyuas txhua yam ntawm cov khoom thaum lub sij hawm tsim khoom, tshwj xeeb tshaj yog nyob rau hauv kev txhaj tshuaj molding khoom lag luam.
Txhaj molded qhov chaw ua cov khoom lag luam tau nkag mus rau hauv txhua qhov kev lag luam, thiab kev txhim kho txuas ntxiv ntawm cov khoom yas tau ua rau ntau qhov chaw uas yav tas los yuav tsum tau ua los ntawm cov hlau tag nrho hloov tau nrog cov khoom siv yas.
Txawm li cas los xij, vim muaj qhov zoo fluidity ntawm cov yas thiab qhov nyuaj ntawm kev tswj nws qhov loj me, kev tsim cov txheej txheem ntawm kev txhaj tshuaj molded qhov chaw yog qhov nyuaj dua li lwm yam kev lag luam. Tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus, yog tias tsis them sai sai rau, kev txhaj tshuaj molding yog nquag mus rau pores, xim txawv, flash edges, thiab lwm yam tshwm sim. Nyob rau hauv cov xwm txheej hnyav, cov khoom raug tshem tawm ncaj qha. Cov teeb meem no tshwm sim hauv cov txheej txheem txhaj tshuaj molding ncaj qha mus kuaj seb puas muaj kev txhaj tshuaj molding engineers muaj kev tswj xyuas cov ntsiab lus ntawm kev txhaj tshuaj molded khoom.
Cov yam ntxwv ntawm kev txhaj tshuaj molding zoo tib yam yog:
Qhov kev xav tau qhov tseeb ntawm qhov kev txhaj tshuaj molded qhov chaw tsis siab, feem ntau yog raws li tus qauv ntawm kev tuaj yeem sib sau ua ke. Cov kev xav tau ntawm kev txhaj tshuaj molded qhov chaw yog qhov siab, thiab yog tias tsim nyog, kev ua haujlwm thib ob (xws li kev txhaj tshuaj roj) yuav raug siv los txhim kho cov tsos mob.
Kev txhaj tshuaj molding tsis tas yuav tsum tau siv cov tshuab txhaj tshuaj tshwj xeeb lossis cov khoom siv tshwj xeeb. Feem ntau siv cov thermoplastic plastics tuaj yeem siv rau kev tsim khoom, yog li cov txheej txheem txhaj tshuaj molding zoo tib yam tau siv dav hauv kev lag luam yas niaj hnub.
Txhaj tshuaj molding: Yog tias phab ntsa tuab ntawm qhov txhaj tshuaj molded tsis sib npaug, nws tuaj yeem ua rau deformation lossis shrinkage ntawm cov khoom. Txhawm rau daws qhov teeb meem no, nws raug nquahu kom cov neeg siv khoom hloov kho cov khoom. Tau kawg, yog tias cov khoom tsis tuaj yeem hloov kho, qhov kev hloov pauv tsuas yog ua tau los ntawm chamfering C lossis R lub kaum sab xis ntawm qhov hloov pauv ntawm tuab thiab nyias. Qhov no yuav txo qhov teeb meem kev ntxhov siab ntawm cov yas thaum lub sij hawm ntws, txo kev ntxhov siab, thiab cov khoom yuav tsis yooj yim deformed. Tau kawg, qhov tuab thiab nyias tsis tuaj yeem tshaj 60 feem pua, Txwv tsis pub, nws yuav tsum tau thinned los yog thickened.