Vim tias qhov zoo ntawm lub teeb yuag, lub cev nyhav zoo, yooj yim sib sau thiab tsis tshua muaj nqi, cov yas siv ntau dua los hloov cov iav hauv kev lag luam niaj hnub thiab cov khoom lag luam niaj hnub, tshwj xeeb hauv kev siv cov khoom siv kho qhov muag thiab ntim kev lag luam. Txawm li cas los xij, feem ntau nws yuav tsum tau siv cov yas siv yuav tsum muaj cov yam ntxwv ntawm kev ua kom zoo, siab hnav tsis kam thiab zoo cuam tshuam toughness. Yog li no, cov kev cai siab tau muab tso rau pem hauv ntej ntawm cov yas sib xyaw, cov txheej txheem, cov khoom siv thiab cov pwm ntawm tag nrho cov txheej txheem ntawmtxhaj tshuaj molding, yog li los xyuas kom meej tias cov yas siv los hloov cov iav (tom qab xa mus rau lub hnab yas pob tshab) muaj cov khoom zoo saum npoo av, thiaj li ua tau raws li cov cai ntawm kev siv.
Tam sim no, cov pob tshab pob tshab uas feem ntau siv hauv khw muaj xws li polymethylmethacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), nylon pob tshab, xws li (acrylonitrile styrene copolymer), polysulfone (PSF), thiab lwm yam, Ntawm lawv, PMMA, PC thiab tsiaj yog peb lub plastics uas peb tau raug rau feem ntau. Vim tias muaj qhov chaw tsis txaus, peb yuav siv peb lub plastics no los ua piv txwv los tham txog cov yam ntxwv thiab kev txhaj tshuaj molding ntawm cov pob tshab pob tshab.
1 、 Cov yam ntxwv ntawm cov yas pob tshab
Lub pob tshab plooj yuav tsum muaj lub siab pob tshab ua ntej, tom qab ntawd qee yam muaj zog thiab hnav tsis kam, muaj kev cuam tshuam, ua haujlwm zoo thaum tshav kub kub, zoo tshuaj lom neeg kuj thiab cov dej nqus me me. Tsuas yog txoj hauv kev no lawv tuaj yeem ua kom tau raws li qhov xav tau ntawm pob tshab thiab muaj qhov ua haujlwm ruaj khov. Cov kev sib piv ntawm kev ua tau zoo ntawm PMMA, PC thiab tus tsiaj muaj qhia nyob hauv qab rooj hauv qab no.
Nco tseg: vim tias muaj ntau ntau yam, qhov no tsuas yog tus nqi nruab nrab. Cov ntaub ntawv tiag tiag ntawm ntau ntau yam yog txawv. PET data (Mechanical) yog cov ntaub ntawv tom qab ncab.
Nws tuaj yeem pom los ntawm cov ntaub ntawv hauv Table 1 tias PC yog qhov kev xaiv zoo tshaj plaws, tab sis vim nws cov khoom siv kim kim thiab kev txhaj tshuaj nyuaj nyuaj, PMMA tseem siv tau ntau dua (rau cov khoom lag luam nrog dav dav), thaum tsiaj yog feem ntau siv rau hauv ntim thiab ntim khoom vim tias nws yuav tsum ua kom ncav kom tau txais lub zog zoo txhua yam.
2 、 Yuav ua li cas xaiv cov ntaub ntawv pob tshab
Cov khoom siv khoom
1. Cov duab pob tshab: PE, PP, PS, PVC thiab PVC rau ntim, PE, PVC thiab tsiaj rau kev ua liaj ua teb, thiab lwm yam
2. Cov pob tshab tawv: PP, PVC, tus tsiaj, PMMA, PC, thiab lwm yam
3. Cov kav dej pob tshab: PVC, PA, thiab lwm yam
4. Cov hwj hwj pob tshab: PVC, tus tsiaj, PP, PS, PC, thiab lwm yam.
Cov khoom siv teeb pom kev zoo
Mas siv raws li kev siv lub teeb roj, siv cov PS, hloov PS, raws li, PMMA, PC, thiab lwm yam.
Khoom siv kho qhov muag
1. Lub iav lub cev tawv: mas CR-39 thiab JD
2. Cov lo ntsiab muag muag: feem ntau siv HEMA.
Iav khoom
1. Cov iav tsheb: feem ntau siv PMMA thiab PC
2. Cov iav vaj tse: feem ntau siv PVF thiab tsiaj.
Cov khoom siv hnub ci
Feem ntau siv PMMA, PC, gf-up, FEP, PVF, Si, thiab lwm yam.
Khoom siv fiber ntau
Lub hauv paus txheej txheem yog PMMA lossis PC, thiab txheej txheej txheej yog fluorine-olefin polymer thiab fluorine-uas muaj methyl methacrylate.
Cov khoom siv CD
Nquag siv PC thiab PMMA.
PMMA, FEP, EVA, EMA, PVB, thiab lwm yam.
3 problems Cov teeb meem feem ntau hauv kev txhaj tshuaj yas pob tshab
Lub pob tshab plooj, vim nws lub teeb xa hluav taws xob ntau, yuav tsum muaj qhov yuav tsum nruj ntawm cov khoom zoo ntawm cov khoom lag luam yas, tsis muaj qhov tsis xws luag xws li mottling, huab cua qhov, ntxuav hniav dawb, pos huab, dub chaw, tshem tawm, cov duab tsis zoo, thiab lwm yam. nyob rau hauv tag nrho cov txheej txheem ntawm kev txhaj tshuaj moulding, peb yuav tsum them sai sai rau thiab muab tso rau pem hauv ntej nruj lossis txawm tias qhov tshwj xeeb tshwj xeeb rau kev tsim cov ntaub ntawv raw, khoom siv, pwm thiab txawm tias cov khoom lag luam. Thib ob, vim tias lub siab yaj thiab ua haujlwm tsis zoo ntawm cov pob tshab pob tshab tshaj plaws, txhawm rau xyuas kom cov khoom zoo ntawm cov khoom, txhaj tshuaj moulding feem ntau yog ua tiav ntawm qhov kub siab dua, thiab kev txhaj tshuaj siab, kev txhaj tshuaj nrawm thiab lwm yam txheej txheem tsis tseem xav tau. txhawm rau kho me ntsis, kom qhov kev txhaj tshuaj tiv thaiv tsis tuaj yeem tsis tsuas tuaj pwm, tab sis kuj tsim kev ntxhov siab sab hauv thiab ua rau deformation thiab tawg ntawm cov khoom.
Hauv qab no yog hais txog kev npaj cov ntaub ntawv raw, cov tseev kom muaj ntawm cov khoom siv thiab pwm, txheej txheem txhaj tshuaj molding thiab cov khoom siv raw ntawm cov khoom.
1. Kev npaj thiab ziab ntawm raw khoom
Raws li ib qho kev tsis muaj tseeb hauv cov yas yuav cuam tshuam rau lub pob tshab ntawm cov khoom, nws yog qhov yuav tsum tau them sai sai rau kev sib khi thaum khaws cia, kev thauj mus los thiab kev pub mis kom ntseeg tau tias qhov huv ntawm cov ntaub ntawv raw. Hauv tshwj xeeb, cov khoom siv raw khoom muaj cov dej noo, uas yuav ua rau cov khoom tawg yooj yim tom qab cua sov, yog li nws yuav tsum tau qhuav, thiab thaum txhaj tshuaj, qhov kev pub mis yuav tsum siv lub plhaw kom qhuav. Nws tseem yuav tsum tau sau tseg tias hauv cov txheej txheem ziab khaub ncaws, cov cua nkag yuav tsum tau lim thiab dehumidified los xyuas kom meej tias cov ntaub ntawv raw yuav tsis muaj kuab paug. Txoj kev ua kom qhuav yog li hauv qab no:
2. Kev ntxuav ntawm cov kav dej, cov ntsia hlau thiab nws cov khoom siv
Txhawm rau tiv thaiv cov khoom ua kom tsis txhob muaj kuab paug thiab muaj cov khoom qub los yog cuam tshuam rau hauv cov ntsia hlau thiab nws cov khoom siv kev nyuaj siab, tshwj xeeb yog cov khoom ua si nrog cov thermal tsis zoo, cov khoom siv yuav tsum tau muab ntxuav nrog cov ntsia hlau nqus dej ua ntej siv thiab tom qab kaw, kom tiv thaiv tau Lub impurities los ntawm so. Thaum tsis muaj ntsia hlau ntxhua khaub ncaws, cov ntsia hlau tuaj yeem ntxuav nrog PE, PS thiab lwm cov khoom tso tawm. Yog tias kaw ib ntus, txhawm rau tiv thaiv cov khoom kom tsis txhob nyob ntev ntev hauv qhov kub thiab ua rau muaj kev cuam tshuam, qhov kub ntawm lub tshuab ziab khaub ncaws thiab lub thoob yuav tsum raug txo kom tsawg. Piv txwv, qhov ntsuas kub ntawm cov thoob xws li PC thiab PMMA yuav tsum txo qis dua hauv qab 160 ℃ (lub plhaw qhov sib luag yuav tsum txo kom qis dua 100 ℃ rau PC).
3. Cov teeb meem hauv pwm tsim (suav nrog cov qauv khoom)
Txhawm rau tiv thaiv thim rov qab lossis tsis txias tsis txaus los ntawm kev ua cov yas tsis zoo, cov teeb meem saum npoo thiab tsis sib haum, cov ntsiab lus hauv qab no yuav tsum tau them sai sai rau hauv pwm tsim.
