1. Dab tsi yog qhov shrinkage ntawm plastics, thiab dab tsi yog qhov tseem ceeb cuam tshuam rau lub shrinkage ntawm plastics?
Shrinkage yog hais txog qhov loj me me ntawm cov yas tom qab nws tau tawm ntawm pwm thiab txias rau chav tsev kub. Vim tias qhov shrinkage no tsis tsuas yog tshwm sim los ntawm thermal expansion thiab txias contraction ntawm resin nws tus kheej, tab sis kuj muaj feem xyuam rau ntau yam molding yam, lub shrinkage ntawm yas qhov chaw tom qab molding yog hu ua molding shrinkage. Cov yam tseem ceeb uas cuam tshuam rau tus nqi shrinkage muaj xws li: (1) ntau yam yas; (2) Cov qauv yas; (3) Pwm qauv; (4) txheej txheem tsim.
2. Dab tsi yog qhov fluidity ntawm cov yas? Dab tsi yog cov yam tseem ceeb uas cuam tshuam rau qhov fluidity ntawm plastics?
Lub peev xwm ntawm cov yas yaj los sau cov pwm kab noj hniav ntawm qhov kub thiab txias yog hu ua yas fluidity. Lub ntsiab tseem ceeb cuam tshuam rau lub fluidity ntawm plastics yog: (1) cov khoom kub; (2) Kev txhaj tshuaj siab; (3) Pwm qauv.
3. Kev ntxhov siab tawg yog dab tsi? Dab tsi yog cov kev ntsuas los tiv thaiv kev ntxhov siab tawg?
Qee cov yas yog rhiab heev rau kev ntxhov siab, yooj yim los tsim kev ntxhov siab sab hauv thaum molding, nkig thiab yooj yim tawg. Thaum cov khoom yas raug rau sab nraud quab yuam lossis hnyav, lawv yooj yim tawg, uas yog hu ua kev ntxhov siab tawg. Txhawm rau tiv thaiv qhov tsis xws luag, ntawm ib sab, cov ntaub ntawv txhawb nqa tuaj yeem muab ntxiv rau hauv cov yas los hloov nws; Ntawm qhov tod tes, kev saib xyuas yuav tsum tau them rau qhov tsim nyog tsim ntawm cov txheej txheem molding thiab pwm, xws li preheating thiab ziab ntawm cov ntaub ntawv ua ntej molding, qhov tseeb specification ntawm molding txheej txheem tej yam kev mob, kom deb li deb li deb li deb li sai tau kom tsis txhob teeb inserts, tom qab kho cov yas. qhov chaw, tsim nyog tsim ntawm lub rooj vag system thiab ejection ntaus ntawv. Nco ntsoov yuav tsum tau them nyiaj rau kev txhim kho cov txheej txheem txheej txheem ntawm cov khoom yas.
4. Dab tsi yog qhov curing yam ntxwv ntawm thermosetting yas thiab dab tsi cuam tshuam?
Curing khoom yog ib yam khoom tshwj xeeb ntawm thermosetting plastics, uas yog hais txog cov txheej txheem ntawm kev ua tiav cov tshuaj tiv thaiv crosslinking thaum thermosetting plastics raug tsim. Lub curing ceev tsis yog tsuas yog cuam tshuam nrog cov yas ntau yam, tab sis kuj rau cov duab, phab ntsa thickness, pwm kub thiab molding txheej txheem ntawm cov khoom yas. Kev kho ceev tuaj yeem ua kom nrawm dua los ntawm kev siv cov khoom siv ua ntej nias, preheating, nce qhov kub ntawm molding thiab nce lub sij hawm pressurization. Tsis tas li ntawd, qhov curing ceev yuav tsum tau raws li qhov yuav tsum tau ntawm txoj kev molding.
5. Polyethylene tuaj yeem muab faib ua ntau hom raws li lub siab siv hauv polymerization, thiab nws tuaj yeem siv rau hauv qhov twg?
Polyethylene tuaj yeem muab faib ua kev kub siab, nruab nrab siab thiab tsis tshua muaj siab polyethylene raws li qhov sib txawv ntawm kev siv hauv polymerization. Kev kub siab polyethylene, tseem hu ua low-density polyethylene, feem ntau yog siv los ua cov yeeb yaj kiab yas (cov khoom ntim zoo tagnrho), hoses, lub raj mis yas, insulating qhov chaw thiab coated cables hauv kev lag luam hluav taws xob. Nruab nrab siab polyethylene Cov txheej txheem tsim nyog tshaj plaws rau nruab nrab siab polyethylene yog kev kub ceev tshuab moulding, lub raj mis tsim, zaj duab xis rau ntim, ntau yam kev txhaj tshuaj molding khoom thiab cov khoom siv molding, thiab tseem tuaj yeem siv rau ntawm cov xov hlau thiab cables. Tsis tshua muaj siab polyethylene tuaj yeem siv los tsim cov kav dej yas, cov ntawv yas, cov hlua yas thiab cov khoom uas tsis muaj peev xwm thauj khoom, xws li lub zog, bearings, thiab lwm yam.
6. Dab tsi yog cov khoom thiab kev siv ntawm polystyrene?
Cov khoom tseem ceeb ntawm polystyrene muaj xws li: (1) nws yog qhov zoo tshaj plaws high-frequency insulating khoom tam sim no; (2) Nws cov tshuaj lom neeg ruaj khov zoo; (3) Nws muaj qhov tsis muaj cua sov thiab tsuas yog siv tau rau qhov kub thiab txias. Nws yog ib qho nyuaj thiab nkig, thiab cov khoom yas yog yooj yim tawg vim muaj kev ntxhov siab sab hauv; (4) Polystyrene muaj pob tshab zoo. Polystyrene tuaj yeem siv rau hauv kev lag luam xws li ntsuas lub plhaub, lub teeb ci, cov khoom siv tshuaj lom neeg, cov qauv pob tshab, thiab lwm yam; Siv los ua cov khoom siv insulating zoo, cov thawv sib txuas, cov thawv roj teeb, thiab lwm yam hauv cov khoom siv hluav taws xob; Nws yog dav siv hauv cov khoom ntim, ntau lub thawv, cov khoom ua si, thiab lwm yam.
7. Dab tsi yog cov khoom thiab kev siv ntawm ABS?
ABS muaj (1) zoo deg hardness, kub tsis kam thiab tshuaj corrosion kuj; (2) Nws tenacity; (3) Nws muaj cov txheej txheem molding zoo thiab kev ua haujlwm xim; 4) Lub thermal deformation kub yog siab dua li ntawm polystyrene, polyvinyl chloride, nylon, thiab lwm yam, nrog zoo seem stability, tshuaj stability thiab zoo dielectric zog. Nws qhov tsis zoo yog qhov tsis zoo thaum tshav kub kub thiab huab cua tsis kam. ABS yog dav siv nyob rau hauv kev lag luam machinery los tsim lub zog, twj impellers, bearings, leeg, kav, motor casings, instrument casings, instrument panels, dej tank casings, roj teeb tso tsheb hlau luam, tub yees thiab tub yees linings; Hauv kev lag luam tsheb, ABS yog siv los tsim tsheb fenders, handrails, kub cua txias ducts, cua sov, thiab lwm yam., thiab ABS sandwich panels yog siv los ua lub cev tsheb; ABS tseem tuaj yeem siv los ua cov dej ntsuas dej, cov khoom siv textile, cov khoom siv hluav taws xob, cov khoom siv ua kis las thiab kev kawm, cov khoom ua si, hluav taws xob piano thiab cov ntawv kaw lus, cov thawv ntim khoom noj, tshuaj tua kab thiab rooj tog.
8. Cov khoom thiab kev siv ntawm phenolic plastics yog dab tsi?
Piv nrog rau cov thermoplastics dav dav, phenolic yas muaj qhov zoo rigidity, me me deformation, kub tsis kam thiab hnav tsis kam, thiab tuaj yeem siv tau ntev hauv qhov kub ntawm 150 ~ 200 degree. Nyob rau hauv cov xwm txheej ntawm cov dej lubrication, nws muaj kev sib txhuam coefficient tsis tshua muaj zog thiab kev ua haujlwm zoo ntawm hluav taws xob rwb thaiv tsev. Qhov tsis zoo ntawm phenolic yas yog nws cov brittleness thiab tsis zoo cuam tshuam lub zog. Phenolic resin tuaj yeem siv los tsim cov iav, cov kabmob, cov log tsheb, lub zog ntsiag to, cov kabmob, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, nrog rau ntau yam coil racks, terminal blocks, hluav taws xob cov cuab yeej vaj tsev, kiv cua nplooj, acid resistant twj impellers, iav thiab cams.
9. Dab tsi yog cov yam ntxwv ntawm kev txhaj tshuaj molding?
Kev txhaj tshuaj molding yog tus cwj pwm los ntawm lub voj voog luv molding, thiab nws tuaj yeem tsim cov khoom yas nrog cov duab zoo, qhov loj me thiab cov khoom sib txuas ntawm ib zaug; Muaj zog adaptability rau ntau yam yas; High efficiency efficiency, khoom zoo kub, yooj yim rau paub tsis siv neeg ntau lawm. Yog li ntawd, nws yog dav siv nyob rau hauv zus tau tej cov yas qhov chaw, tab sis cov raug nqi ntawm kev txhaj tshuaj molding khoom thiab pwm yog siab, uas yog tsis haum rau zus tau tej cov ib thooj thiab me me batch ntawm yas qhov chaw.
10. Qhia luv luv txog lub hauv paus ntsiab lus ntawm kev txhaj tshuaj molding.
Granular los yog hmoov plastics raug xa mus rau hauv lub thoob rhuab los ntawm lub hopper ntawm lub tshuab txhaj tshuaj, uas yog rhuab, melted thiab plasticized rau hauv ib tug viscous yaj. Tsav los ntawm kev kub siab ntawm lub plunger lossis ntsia hlau ntawm lub tshuab txhaj tshuaj, lawv raug txhaj rau hauv pwm kab noj hniav ntawm qhov loj txaus los ntawm lub nozzle. Tom qab qee lub sijhawm ntawm kev tswj xyuas lub siab, txias thiab ua kom zoo, cov duab muab los ntawm cov pwm kab noj hniav tuaj yeem khaws cia, thiab tom qab ntawd cov pwm qhib rau kev sib cais kom tau txais cov pwm yas pwm. Qhov no ua tiav lub voj voog txhaj tshuaj.