Yuav ua li cas xaiv cov qauv hauv cov ntaub yas molding tshuab?
Kev siv tshuaj moulding tshuab hauv txoj hlua hluav taws xob, feem ntau siv lub zog ntsuas txoj kab taub dav dav. Cov neeg mob tshwj xeeb yog tsim nyog, yuav tsum muaj cov pa roj carbon dioxide txaus siab rau cov kev pabcuam siab lossis muaj siab. tshuab yog nruab rau qhov txhaj tshuaj molding ua haujlwm ntawm hom tshuaj.Raws li qhov khoom sib txawv ntawm cov khoom siv tshuaj, ib cov qauv tsim nyog muaj feem ntau yuav tsum xaiv.Qhov qab no yog cov yam ntxwv ntawm cov ciav hlau rau kev txhaj tshuaj molding khoom.
(1) ntsia hlau pas nrig rau PVC cov khoom siv
Vim cov neeg pluag thermal stability ntawm txoj hlua polyvinyl chloride resin, siab viscosity ntawm molten khoom, yog li cov tshuaj pvc-u khoom nrog cov ntsia hlau yuav tsum xaiv me me compression ratio (feem ntau yog siv 1.4 ~ 2), thiab qhov ntev mus rau qhov piv cov me me, homogenization ntawm cov ntsia hlau (ntsuas) thiab chaw thau khoom (thauj khoom) yog luv dua, thiab homogenization ntawm qhov xov qhov zaws mus ntxaum.Qhov taub hau ntawm lub hau yuav tsum tau ceev thiab qhov kev txhaj tshuaj nozzle yuav tsum ncaj nraim ntawm.
(2) ntsia hlau qws rau ABS thiab lwm cov khoom yas tsis-crystalline
Cov kab hlau sib txuas rau kev txhaj molding ntawm amorphous plastics xws li ABS yuav raug siv rau cov qauv txhuam tsis muaj homogeneous seem (ntsuas ntu) tab sis tsuas pub noj tshooj thiab kev hloov hauv seem.Qhov no tuaj yeem txo cov khoom uas overheating thiab txhim kho cov peev xim thiab nws cov nyhuv ntawm cov nqus . Kev txhaj tshuaj ntawm amorphous high viscosity frit (xws li PS PS, PPO, PC, PMMA, AS thiab POM), ncaj qha los ntawm lub taub hau yuav tsum siv.
(3) ntsia hlau pas nrig rau kev txhaj tshuaj ntawm crystalline plastics xws li polyethylene thiab polypropylene
Xws li cov polyethylene, polypropylene crystallization hom yas txhaj tshuaj nrog cov ntsia hlau, feem ntau yuav tsum tau xaiv qhov loj compression ratio (3 ~ 3.5) ntawm cov ntsia hlau, thiab yuav tsum muaj lub nplhaib ntawm cov khoom tsis yog rov qab, qhov no yog los xyuas kom meej tias qhov ua hauj lwm zoo ntawm cov txhaj molding tshuab, tiv thaiv qhov rov qab ntws ntawm cov kua txhaj yog loj dua.Vim cov viscosity tsawg ntawm cov cob, cov tshuaj tiv thaiv nozzle yuav tsum tau saws.