Ib, Kev txhaj tshuaj molding tso tawm yog dab tsi, thiab vim li cas nws tseem ceeb
Txhaj tshuaj molding tso pa tawm yog cov txheej txheem ntawm kev tso pa tawm ntawm huab cua, chav, lossis cov pa tsis haum los ntawm cov pwm kab noj hniav thaum lub sijhawmtxhaj tshuaj moldingtxheej txheem. Cov pwm tau ntim sai sai nrog cov yas molten thaum lub sijhawm txhaj tshuaj molding, uas tshwm sim ntawm qhov kub thiab txias. Yog tias huab cua tsis tuaj yeem tso tawm sai sai, cov hnab ntim roj lossis cov npuas tuaj yeem tsim hauv pwm kab noj hniav
Lub qhov tso pa tawm muaj qhov tso pa tawm, qhov tso pa tawm, thiab qhov cua tsim tawm. Cov no yog txhua qhov tseem ceeb uas pab kom cov khoom muaj qhov du, yog qhov loj, thiab muaj suab nrov. Cov pa phem tsis tsuas yog txo qis cov khoom zoo ntawm tus kheej, tab sis nws tuaj yeem ua rau qeeb thiab nce cov nqi seem.
2, Cov pa phem npaum li cas cuam tshuam rau qhov zoo ntawm cov khoom
Cov cim huab cua thiab qhov tsaus ntuj
Qhov pom tseeb tshaj plaws ntawm kev tso pa tawm tsis zoo yog qhov pom ntawm huab cua lossis cov pob dub ntawm cov khoom nto. Cov no yog cov pits me me lossis cov dots dub uas tshwm sim ntawm qhov chaw tom qab tau qhwv hauv cov yas molten vim tias huab cua lossis cov pa tsis haum tsis tau tso tawm sai txaus, tshwj xeeb tshaj yog rau cov ntaub ntawv ntshiab lossis lub teeb - xim.
Cov cim los ntawm hlawv
Thaum cov huab cua nyob hauv cov pwm kab noj hniav kub heev, nws yuav hnov mob nrog cov yas molten nyob rau hauv ib txoj kev uas ua rau me ntsis hlawv caws pliav los yog lub teeb - xim kub. Qhov no yuav hloov qhov zoo thiab kev xav ntawm cov khoom.
Wrinkles thiab indentations ntawm qhov chaw
Thaum huab cua nkag mus rau hauv pwm, nws nres qhov ntws ntawm cov yas molten, uas ua rau lub ntsej muag shrinks unevenly thiab ua rau wrinkles los yog indentations. Qhov no tshwm sim ntau heev nyob rau hauv loj - cheeb tsam nyias- cov khoom phab ntsa.
3, Cov pa phem npaum li cas cuam tshuam rau kev tsim khoom
Kev ntxhov siab ntau hauv
Yog tias huab cua tsis tuaj yeem tawm, lub siab hauv pwm tuaj yeem ua tsis sib xws, ua rau muaj kev ntxhov siab rau cov khoom yas hauv txoj kev tsis sib xws. Sij hawm dhau mus, kev ntxhov siab sab hauv tuaj yeem tsim thiab ua rau cov khoom tsis muaj zog, ua rau nws muaj peev xwm tawg lossis tawg thaum siv.
Sau cov pwm ib nrab
Cov pa phem tuaj yeem ua rau qeeb ntawm cov khoom molten, ua rau qee qhov ntawm cov pwm kab noj hniav yuav tsum tau ntim nrog yas. Qhov no tuaj yeem ua rau shrinkage, txhaj tshuaj luv luv, lossis voids, uas tuaj yeem cuam tshuam cov khoom loj thiab ua haujlwm.
Ntau brittleness
Qee cov roj tau daig hauv cov yas, uas ua rau lub qhov microscopic uas ua rau cov khoom tsis muaj zog thiab tsis muaj peev xwm tiv taus qhov cuam tshuam. Qhov no yog qhov tseeb tshwj xeeb tshaj yog rau cov khoom uas yuav tsum muaj zog, xws li cov khoom siv hluav taws xob thiab cov khoom siv tsheb.
4, Cov pa phem npaum li cas cuam tshuam txog qhov ua tau zoo npaum li cas
Ua kom tus nqi seem zoo dua
Cov pa paug tsis zoo tuaj yeem nce qhov ntau ntawm cov khoom tsis raug, uas ncaj qha nce cov nqi ntawm cov ntaub ntawv thiab kev tsim khoom. Qhov no tuaj yeem tshwm sim vim muaj qhov tsis xws luag, pwm tsis zoo, lossis teeb meem sab hauv porosity.
Ua kom cov pwm hnav sai dua
Cov huab cua nyob rau hauv cov pwm kab noj hniav nyob rau hauv lub siab siab tuaj yeem ua rau qhov kub thiab txias hauv cheeb tsam ntawd. Qhov no tuaj yeem ua rau cov pwm ntog, ua kom cov pwm hnav thiab xeb, thiab ua rau lub neej luv.
Lub suab ntawm ntau lawm hloov.
Txhawm rau kom tsis txhob muaj roj seem, koj yuav tsum ncua lub sijhawm tuav lossis ua kom lub voj voog ua kom luv. Qhov no yuav txo cov efficiency thiab tawm los ntawm cov txheej txheem ntau lawm.
5, Kev sib raug zoo ntawm cov pa phem thiab cov khoom siv
Cov ntaub ntawv uas muaj fluidity siab (xws li PP thiab PE) tsis xav tau ntau npaum li cov pa tawm, tab sis nyias - cov khoom siv phab ntsa lossis cov pwm sib txawv tseem xav tau cov pa tawm txaus kom tsis txhob muaj cov pa phem.
Engineering plastics, suav nrog ABS, PC, thiab PA, yog qhov nkag siab zoo rau kev tso pa tawm. Yog tias qhov tso pa tawm tsis zoo, nws tuaj yeem ua rau cov pob dub tau yooj yim, txhaj tshuaj luv luv, lossis hlawv.
Cov ntaub ntawv pob tshab (xws li PMMA thiab PC): Cov pa phem tuaj yeem cuam tshuam ncaj qha rau qhov tseeb ntawm cov khoom, ua rau npuas lossis pos huab -zoo li cov cim huab cua thiab txo cov khoom zoo.
cov pwm tsim tawm yuav tsum tau hloov raws li hom khoom thiab cov kev xav tau ntawm cov khoom.
6, Yog vim li cas rau pa phem
Tsis txaus xav mus rau hauv lub qhov tso pa tawm tsim
Yog tias lub qhov tso tawm me me dhau los yog tsis nyob hauv qhov chaw zoo, huab cua yuav nkag mus rau hauv, tshwj xeeb tshaj yog nyob rau hauv cov pwm nrog cov phab ntsa tuab lossis cov txheej txheem nyuaj.
Thaiv lub qhov tso pa tawm
Plastic residue los yog plua plav tuaj yeem cuam tshuam qhov tso pa tawm thaum lub pwm ua haujlwm, uas yuav cuam tshuam cov pa tawm.
Tus nqi ntws ntawm cov yaj yog ceev heev.
Cov dej ntws ntau dhau tuaj yeem thawb cua mus rau hauv pwm, ua rau cov pa ua haujlwm nyuaj.
Pwm uas tsis tswj qhov kub thiab txias sib npaug
Yog tias cov pwm kub dhau los yog txias dhau rau hauv ib qho chaw, cov yaj yuav tsis ntws ib txwm, uas yuav ua rau cov pa phem.
Tej yam uas ntub heev los yog hloov sai heev
Thaum koj siv kev txhaj tshuaj molding, cov ntaub ntawv uas ntub dej los yog tsis ruaj khov yuav muab cov pa tawm. Yog tias qhov kev tsim tawm tsis zoo txaus, nws yooj yim rau cov npuas lossis cov xim dub kom loj hlob hauv pwm.
