Vim yog lub siab hloov ntaub ntawv ntawm pob tshabplastics, cov nplauv zoo ntawm cov khoom lag luam yas yuav tsum nruj, tsis muaj kab txaij, qhov hws thiab ntxuav hniav dawb. Cov huab tawg, cov pob dub, tshem tawm, tsis zoo thiab lwm yam tsis xws luag, yog li nyob rau hauv tag nrho cov kev txhaj tshuaj molding cov txheej txheem ntawm cov ntaub ntawv raw, khoom siv.
Kev txwv nruj thiab txawm tias qhov tshwj xeeb yuav tsum tau them rau thiab muab tso rau pem hauv ntej tsim cov pwm thiab cov khoom lag luam. Thib ob, vim tias lub siab yaj thiab ua tsis zoo ntawm cov pob tshab pob tshab, txhawm rau kom cov khoom zoo ntawm cov khoom, nws yog feem ntau yuav tsum kho cov txheej txheem cov txheej txheem xws li kub, txhaj tshuaj siab, txhaj tshuaj nrawm, thiab lwm yam, kom kev txhaj tshuaj ntawm cov yas tsis tuaj yeem tsis tsuas yog tuaj pwm, tab sis kuj yuav tsis tsim kev ntxhov siab sab hauv, uas yuav ua rau deformation thiab tawg ntawm qhov khoom.
Hauv qab no yog kev npaj cov khoom siv raw. Daim ntawv no tham txog cov teeb meem xav tau kev saib xyuas hauv cov khoom ntawm cov cuab yeej siv thiab kev xav tau pwm, kev txhaj tshuaj molding cov txheej txheem thiab cov khoom siv raw kev kho mob ntawm cov khoom.
Kev npaj thiab ziab ntawm raw khoom
Raws li ib qho kev tsis muaj tseeb nyob hauv cov yas yuav cuam tshuam rau cov pob tshab ntawm cov khoom, yog li ntawd, thiab kev cia khoom, kev thauj mus los. Hauv kev ua haujlwm ntawm kev pub mis, yuav tsum tau them nyiaj rau kev sib khi kom ntseeg tau tias cov ntaub ntawv raw.
Hauv tshwj xeeb, cov khoom siv raw khoom muaj cov dej noo, uas yuav ua rau lub cev tsis zoo ntawm cov khoom siv tom qab cua sov, yog li nws yuav tsum tau qhuav, thiab thaum lub sijhawm txhaj tshuaj, lub tshuab raj kom qhuav yuav tsum siv rau kev pub mis. Txhawm rau txhawm rau paub tseeb tias cov huab cua yuav tsis ua pa thaum lub sijhawm ziab.
Kev ntxuav tu ntawm cov ntsia hlau, cov ntsia hlau thiab cov khoom ntxiv
Txhawm rau tiv thaiv cov khoom ua kom tsis muaj kuab paug thiab muaj cov khoom qub lossis cov khoom tsis zoo hauv cov ntsia hlau thiab cov khoom siv tiv thaiv kev nyuaj siab, tshwj xeeb tshaj yog muaj cov khoom siv nrog cov roj thermal tsis ruaj, ntsia hlau nqus yuav tsum siv los ntxuav txhua qhov chaw ua ntej siv thiab tom qab kaw, kom tsis muaj impurities tuaj yeem raug daig. Thaum tsis muaj cov ntsia hlau los tu tus neeg saib xyuas, PE, PS thiab lwm cov resins tuaj yeem siv los ntxuav cov ntsia hlau.
Thaum lub tshuab hluav taws xob kaw ib ntus, txhawm rau tiv thaiv cov khoom nyoos kom tsis txhob nyob hauv qhov kub thiab txias ntev ntev, qhov kub ntawm lub tshuab ziab khaub ncaws thiab lub thoob yuav tsum tau txo, xws li PC, PMMA, thiab lwm yam, kom qis dua 160 ℃. (hopper kub yuav tsum tsawg dua 100 ℃ rau PC)
Pwm tsim (nrog rau cov qauv khoom)
Txhawm rau tiv thaiv kev thim rov qab tsis zoo, cov teeb meem saum npoo thiab lub cev tsis zoo los ntawm qhov tsis zoo rov qab los yog cua txias tsis txaus, cov ntsiab lus hauv qab no yuav tsum tau them rau hauv pwm tsim:
Cov phab ntsa tuab yuav tsum zoo ib yam li ua tau, thiab txoj kab nqes ntawm cov nyom yuav tsum yog qhov loj txaus;
Txoj kev hloov yuav tsum yog qeeb me ntsis. Txoj kev hloov pauv kom tiv thaiv cov ces kaum ntse. Ntse ntug, tshwj xeeb tshaj yog cov khoom PC yuav tsum tsis muaj qhov tsis sib xws;
Rooj vag. Tus khiav yuav tsum dav thiab luv li sai tau, thiab lub rooj vag txoj haujlwm yuav tsum tau teeb tsa raws li cov txheej txheem shrinkage hws. Yog tias tsim nyog, cov khoom siv txias yuav tsum tau ntxiv;
Lub ntsej muag tuag yuav tsum du thiab du, nrog qis roughness (dua li qis dua 0.8);
Qhov quav. Lub tank yuav tsum tsim nyog kom tso cua thiab roj kom yaj hauv cov sijhawm;
Tshwj tsis yog tsiaj, lub phab ntsa tuab yuav tsum tsis txhob dhau nyias, feem ntau tsis tsawg tshaj li 1 hli.
Txhaj tshuaj molding tshuab thiab txhaj tshuaj molding tshuab
Txhawm rau kom txo qhov kev ntxhov siab sab hauv thiab sab nrauv qhov tsis zoo, cov teeb meem hauv qab no yuav tsum tau them sai sai rau hauv txheej txheem kev txhaj tshuaj molding
Kev txhaj tshuaj molding tshuab nrog cov ntsia hlau tshwj xeeb thiab cais qhov kub tswj tsis pub dhau lub suab yuav tsum tau xaiv;
Nyob rau qhov pom tias lub hnab yas tsis yas, cov kev txhaj tshuaj yuav tsum yog siab dua;
Txawm li cas los xij, vim yog lub siab yaj ntawm lub zog thiab lub siab ua haujlwm, nws nyuaj rau kev kov yeej cov teeb meem sab hauv;
Kev txhaj tshuaj nrawm: feem ntau, nws yuav tsum tau qis thaum txhaj pwm txaus. Nws yog qhov zoo dua los txais yuav ntau theem ntawm kev txhaj tshuaj ntawm cov qeeb qeeb ceev;
Tuav lub sijhawm thiab lub voj voog molding: nyob rau hauv cov xwm txheej uas cov khoom lag luam txaus siab thiab tsis muaj kev nyuaj siab thiab npuas, nws yuav tsum tau luv li sai tau los txo lub chaw nyob lub sijhawm ntawm cov khoom siv molten hauv chim;
Cov ntsia hlau ceev thiab nrawm nraub qaum: nyob rau qhov chaw ntawm lub rooj sib tham yas zoo, nws yuav tsum ua kom tsawg li tsawg tau los tiv thaiv qhov ua kom poob;
Cov pwm kub: qhov txias txias ntawm cov khoom muaj qhov cuam tshuam rau qhov zoo, yog li cov pwm kub yuav tsum muaj peev xwm tswj cov txheej txheem kom yog, yog tias ua tau, pwm kub yuav tsum muaj ntau dua.
Lwm yam teeb meem
Txhawm rau tiv thaiv kom tsis txhob muaj teeb meem ntawm lub npoo sab saum toj zoo, tus tso tawm yuav tsum siv tsawg li sai tau thaum txhaj tshuaj molding; thaum cov khoom siv coj los siv, nws yuav tsum tsis pub ntau tshaj 20%.
Tag nrho cov khoom tshwj tsis yog tsiaj yuav tsum tau kho kom tshem tawm kev ntxhov siab sab hauv. PMMA yuav tsum tau qhuav hauv 70-80t cov cua kub cua rau 4 teev; PC yuav tsum tau qhuav hauv cov cua huv thiab glycerin. Lub sijhawm ua kom sov lub sijhawm ua kua paraffin wax ntawm 110-135 ℃ nyob ntawm cov khoom lag luam, thiab lub sijhawm siab tshaj plaws yog ntau dua 10 teev. Yuav kom tau txais cov khoom zoo rau lub tshuab, tus tsiaj yuav tsum mus dhau ntawm kev tsim cov txheej txheem thiav biaxialWhat teeb meem yuav tsum tau them sai sai rau hauv cov pob tshab yas txhaj tshuaj?
Vim lub siab transmittance ntawm cov pob tshab pob tshab, qhov zoo ntawm cov khoom yas yog qhov yuav tsum ua kom nruj, tsis muaj kab txaij, qhov hws thiab ntxuav hniav dawb. Cov huab tawg, cov pob dub, tshem tawm, tsis zoo thiab lwm yam tsis xws luag, yog li nyob rau hauv tag nrho cov kev txhaj tshuaj molding cov txheej txheem ntawm cov ntaub ntawv raw, khoom siv.
Kev txwv nruj thiab txawm tias qhov tshwj xeeb yuav tsum tau them rau thiab muab tso rau pem hauv ntej tsim cov pwm thiab cov khoom lag luam. Thib ob, vim tias lub siab yaj thiab ua tsis zoo ntawm cov pob tshab pob tshab, txhawm rau kom cov khoom zoo ntawm cov khoom, nws yog feem ntau yuav tsum kho cov txheej txheem cov txheej txheem xws li kub, txhaj tshuaj siab, txhaj tshuaj nrawm, thiab lwm yam, kom kev txhaj tshuaj ntawm cov yas tsis tuaj yeem tsis tsuas yog tuaj pwm, tab sis kuj yuav tsis tsim kev ntxhov siab sab hauv, uas yuav ua rau deformation thiab tawg ntawm qhov khoom.
Hauv qab no yog kev npaj cov khoom siv raw. Daim ntawv no tham txog cov teeb meem xav tau kev saib xyuas hauv cov khoom ntawm cov cuab yeej siv thiab kev xav tau pwm, kev txhaj tshuaj molding cov txheej txheem thiab cov khoom siv raw kev kho mob ntawm cov khoom.
Kev npaj thiab ziab ntawm raw khoom
Raws li ib qho kev tsis muaj tseeb nyob hauv cov yas yuav cuam tshuam rau cov pob tshab ntawm cov khoom, yog li ntawd, thiab kev cia khoom, kev thauj mus los. Hauv kev ua haujlwm ntawm kev pub mis, yuav tsum tau them nyiaj rau kev sib khi kom ntseeg tau tias cov ntaub ntawv raw.
Hauv tshwj xeeb, cov khoom siv raw khoom muaj cov dej noo, uas yuav ua rau lub cev tsis zoo ntawm cov khoom siv tom qab cua sov, yog li nws yuav tsum tau qhuav, thiab thaum lub sijhawm txhaj tshuaj, lub tshuab raj kom qhuav yuav tsum siv rau kev pub mis. Txhawm rau txhawm rau paub tseeb tias cov huab cua yuav tsis ua pa thaum lub sijhawm ziab.
Kev ntxuav tu ntawm cov ntsia hlau, cov ntsia hlau thiab cov khoom ntxiv
Txhawm rau tiv thaiv cov khoom ua kom tsis muaj kuab paug thiab muaj cov khoom qub lossis cov khoom tsis zoo hauv cov ntsia hlau thiab cov khoom siv tiv thaiv kev nyuaj siab, tshwj xeeb tshaj yog muaj cov khoom siv nrog cov roj thermal tsis ruaj, ntsia hlau nqus yuav tsum siv los ntxuav txhua qhov chaw ua ntej siv thiab tom qab kaw, kom tsis muaj impurities tuaj yeem raug daig. Thaum tsis muaj cov ntsia hlau los tu tus neeg saib xyuas, PE, PS thiab lwm cov resins tuaj yeem siv los ntxuav cov ntsia hlau.
Thaum lub tshuab hluav taws xob kaw ib ntus, txhawm rau tiv thaiv cov khoom nyoos kom tsis txhob nyob hauv qhov kub thiab txias ntev ntev, qhov kub ntawm lub tshuab ziab khaub ncaws thiab lub thoob yuav tsum tau txo, xws li PC, PMMA, thiab lwm yam, kom qis dua 160 ℃. (hopper kub yuav tsum tsawg dua 100 ℃ rau PC)
Pwm tsim (nrog rau cov qauv khoom)
Txhawm rau tiv thaiv kev thim rov qab tsis zoo, cov teeb meem saum npoo thiab lub cev tsis zoo los ntawm qhov tsis zoo rov qab los yog cua txias tsis txaus, cov ntsiab lus hauv qab no yuav tsum tau them rau hauv pwm tsim:
Cov phab ntsa tuab yuav tsum zoo ib yam li ua tau, thiab txoj kab nqes ntawm cov nyom yuav tsum yog qhov loj txaus;
Txoj kev hloov yuav tsum yog qeeb me ntsis. Txoj kev hloov pauv kom tiv thaiv cov ces kaum ntse. Ntse ntug, tshwj xeeb tshaj yog cov khoom PC yuav tsum tsis muaj qhov tsis sib xws;
Rooj vag. Tus khiav yuav tsum dav thiab luv li sai tau, thiab lub rooj vag txoj haujlwm yuav tsum tau teeb tsa raws li cov txheej txheem shrinkage hws. Yog tias tsim nyog, cov khoom siv txias yuav tsum tau ntxiv;
Lub ntsej muag tuag yuav tsum du thiab du, nrog qis roughness (dua li qis dua 0.8);
Qhov quav. Lub tank yuav tsum tsim nyog kom tso cua thiab roj kom yaj hauv cov sijhawm;
Tshwj tsis yog tsiaj, lub phab ntsa tuab yuav tsum tsis txhob dhau nyias, feem ntau tsis tsawg tshaj li 1 hli.
Txhaj tshuaj molding tshuab thiab txhaj tshuaj molding tshuab
Txhawm rau kom txo qhov kev ntxhov siab sab hauv thiab sab nrauv qhov tsis zoo, cov teeb meem hauv qab no yuav tsum tau them sai sai rau hauv txheej txheem kev txhaj tshuaj molding
Kev txhaj tshuaj molding tshuab nrog cov ntsia hlau tshwj xeeb thiab cais qhov kub tswj tsis pub dhau lub suab yuav tsum tau xaiv;
Nyob rau qhov pom tias lub hnab yas tsis yas, cov kev txhaj tshuaj yuav tsum yog siab dua;
Txawm li cas los xij, vim yog lub siab yaj ntawm lub zog thiab lub siab ua haujlwm, nws nyuaj rau kev kov yeej cov teeb meem sab hauv;
Kev txhaj tshuaj nrawm: feem ntau, nws yuav tsum tau qis thaum txhaj pwm txaus. Nws yog qhov zoo dua los txais yuav ntau theem ntawm kev txhaj tshuaj ntawm cov qeeb qeeb ceev;
Tuav lub sijhawm thiab lub voj voog molding: nyob rau hauv cov xwm txheej uas cov khoom lag luam txaus siab thiab tsis muaj kev nyuaj siab thiab npuas, nws yuav tsum tau luv li sai tau los txo lub chaw nyob lub sijhawm ntawm cov khoom siv molten hauv chim;
Cov ntsia hlau ceev thiab nrawm nraub qaum: nyob rau qhov chaw ntawm lub rooj sib tham yas zoo, nws yuav tsum ua kom tsawg li tsawg tau los tiv thaiv qhov ua kom poob;
Cov pwm kub: qhov txias txias ntawm cov khoom muaj qhov cuam tshuam rau qhov zoo, yog li cov pwm kub yuav tsum muaj peev xwm tswj cov txheej txheem kom yog, yog tias ua tau, pwm kub yuav tsum muaj ntau dua.
Lwm yam teeb meem
Txhawm rau tiv thaiv kom tsis txhob muaj teeb meem ntawm lub npoo sab saum toj zoo, tus tso tawm yuav tsum siv tsawg li sai tau thaum txhaj tshuaj molding; thaum cov khoom siv coj los siv, nws yuav tsum tsis pub ntau tshaj 20%.
Tag nrho cov khoom tshwj tsis yog tsiaj yuav tsum tau kho kom tshem tawm kev ntxhov siab sab hauv. PMMA yuav tsum tau qhuav hauv 70-80t cov cua kub cua rau 4 teev; PC yuav tsum tau qhuav hauv cov cua huv thiab glycerin. Lub sijhawm ua kom sov lub sijhawm ua kua paraffin wax ntawm 110-135 ℃ nyob ntawm cov khoom lag luam, thiab lub sijhawm siab tshaj plaws yog ntau dua 10 teev. Txhawm rau kom tau txais cov cuab yeej zoo rau lub cev, tus tsiaj yuav tsum tau hla cov txheej txheem kev nthuav dav biaxial
