PET (Polyethylene terephthalate)
Qhuav thiab crystallizing ua ntej txhaj tshuaj molding ua
Nws yuav tsum tau qhuav ua ntej molding.PET yog rhiab heev rau hydrolysis.Cov pa cua cua sov-dryer yog 120-165 C (248-329 F) rau 4 teev.Cov dej noo yuav tsum tsawg dua 0.02%.
Txais yuav ODEMADE IRD system, lub sij hawm ziab tsuas xav tau 15mins.Txuag hluav taws xob raug nqi txog 45-50%.Cov dej noo tuaj yeem yog 50-70ppm.(Lub tshuab ziab khaub ncaws, lub sijhawm ziab tuaj yeem kho tau los ntawm cov neeg siv khoom xav tau ntawm cov khoom siv ziab, tag nrho cov txheej txheem yog tswj los ntawm Siemens PLC).Thiab nws yog kev ua haujlwm nrog ziab & Crystallizing ib zaug.
Melt kub
265-280 C (509-536 F) rau cov qhab nia tsis tau ua tiav
275-290 C (527-554 F) rau qib iav reinforcement
Pwm kub
80-120 C (176-248 F);Ntau yam xav tau: 100-110 C (212-230 F)
Cov khoom siv txhaj tshuaj siab
30-130 MPa
Txhaj ceev
Kev kub ceev tsis ua rau embrittlement
Txhaj tshuaj molding tshuab:
Kev txhaj tshuaj molding feem ntau yog siv los txhim kho molding ntawm PET.Feem ntau, PET tsuas yog tsim los ntawm lub tshuab txhaj tshuaj molding tshuab.
Nws yog qhov zoo tshaj plaws los xaiv ib tug mutant ntsia hlau nrog lub nplhaib rov qab rau sab saum toj, uas muaj qhov loj ntawm qhov tawv tawv thiab hnav tsis kam, thiab qhov sib piv tsis yog L / D = (15 ~ 20): 1 compression ratio ntawm 3: 1.
Cov khoom siv nrog L / D loj dhau nyob rau hauv lub thoob rau ntev heev, thiab cov cua kub ntau dhau tuaj yeem ua rau degradation thiab cuam tshuam rau kev ua haujlwm ntawm cov khoom.Lub compression ratio yog me me dhau los ua kom muaj cua sov tsawg, yooj yim rau plasticize, thiab muaj kev ua haujlwm tsis zoo.Ntawm qhov tod tes, qhov tawg ntawm cov iav fibers yuav ntau dua thiab cov khoom siv ntawm cov fibers yuav raug txo.Thaum cov iav fiber reinforced PET yog ntxiv dag zog, lub puab phab ntsa ntawm lub thoob yog hnyav hnyav, thiab lub thoob yog ua los ntawm ib tug hnav resistant khoom los yog lined nrog ib tug hnav resistant khoom.
Txij li thaum lub nozzle luv luv, cov phab ntsa sab hauv yuav tsum yog hauv av thiab lub aperture yuav tsum loj li sai tau.Lub nozzle ntawm hydraulic nres valve hom yog zoo.Lub nozzles yuav tsum muaj rwb thaiv tsev thiab ntsuas kub los xyuas kom meej tias lub nozzles tsis khov thiab thaiv.Txawm li cas los xij, qhov kub ntawm lub nozzle yuav tsum tsis txhob siab dhau, txwv tsis pub nws yuav ua rau dej ntws.Cov khoom siv PP uas tsis tshua muaj siab yuav tsum tau siv thiab lub thoob ntxuav ua ntej pib tsim.
Lub ntsiab txhaj tshuaj molding tej yam kev mob rau PET
1, qhov kub ntawm lub thoob.Lub molding kub ntau ntawm PET yog nqaim, thiab qhov kub thiab txias yuav cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov khoom.Yog tias qhov kub thiab txias qis dhau, nws tsis zoo rau cov khoom yas yas, dents, thiab cov khoom tsis zoo;ntawm qhov tsis sib xws, yog tias qhov kub thiab txias dhau lawm, nws yuav ua rau tawg, lub nozzles yuav ntws, xim yuav tsaus dua, lub zog txhua yam yuav txo, thiab txawm tias degradation yuav tshwm sim.Feem ntau, qhov kub ntawm lub thoob yog tswj ntawm 240 txog 280 ° C, thiab cov iav fiber reinforced PET chim kub yog 250 txog 290 ° C. Qhov kub ntawm lub nozzle yuav tsum tsis txhob ntau tshaj 300 ° C, thiab qhov kub ntawm lub nozzle feem ntau yog qis dua. tshaj lub chim kub.
2, pwm kub.Cov pwm kub ncaj qha cuam tshuam rau qhov txias txias thiab crystallinity ntawm cov yaj, cov crystallinity txawv, thiab cov khoom ntawm cov khoom yas kuj txawv.Feem ntau, pwm kub yog tswj ntawm 100 txog 140 ° C.Cov nqi me me raug pom zoo thaum tsim cov yas yas nyias nyias.Thaum tsim cov yas tuab tuab, nws raug pom zoo kom muaj nqi ntau dua.
3. Kev txhaj tshuaj siab.PET yaj yog kua thiab yooj yim rau tsim.Feem ntau, nruab nrab siab yog siv, lub siab yog 80 mus rau 140 MPa, thiab cov iav fiber ntau zog PET muaj kev txhaj tshuaj siab ntawm 90 mus rau 150 MPa.Kev txhaj tshuaj siab yuav tsum tau txiav txim siab los ntawm kev txiav txim siab qhov viscosity ntawm PET, hom thiab tus nqi ntawm cov muab tub lim, qhov chaw thiab qhov loj ntawm lub rooj vag, cov duab thiab qhov loj ntawm cov yas, qhov pwm kub, thiab hom kev txhaj tshuaj molding tshuab. .
Koj paub ntau npaum li cas txog kev ua cov yas PET?
1, yas ua
Txij li thaum PET macromolecules muaj lipid puag thiab muaj qee yam hydrophilicity, cov khoom yog rhiab heev rau dej ntawm qhov kub thiab txias.Thaum cov dej noo ntau dhau qhov kev txwv, qhov hnyav molecular ntawm PET txo qis, thiab cov khoom yog xim thiab ua nkig.Hauv qhov no, cov khoom siv yuav tsum tau qhuav ua ntej ua haujlwm.Qhov kub kom qhuav yog 150 4 teev, feem ntau 170 3 mus rau 4 teev.Txoj kev dav hlau dav hlau siv los ntsuas seb cov khoom puas qhuav tag.
2. Kev xaiv ntawm kev txhaj tshuaj molding tshuab
PET muaj qhov luv luv melting point thiab lub siab melting point, yog li nws yog ib qho tsim nyog los xaiv qhov kev txhaj tshuaj nrog qhov ntsuas kub loj dua thiab qis dua tus kheej cua sov thaum lub sij hawm plasticization, thiab qhov hnyav ntawm cov khoom tsis tuaj yeem tsawg dua 2/3 ntawm nws luj.Tus nqi ntawm lub tshuab txhaj tshuaj.Raws li cov kev cai no, nyob rau xyoo tas los no, Ramada tau tsim cov txheej txheem me me thiab nruab nrab PET tshwj xeeb plasticizing tshuab.Qhov xaiv clamping quab yuam yog ntau dua 6300t / m2.
3. Pwm thiab rooj vag tsim
PET preforms feem ntau yog tsim los ntawm kub khiav pwm.Lub tshav kub tiv thaiv ntawm cov pwm thiab lub tshuab txhaj tshuaj molding yog qhov zoo dua insulated nrog lub thickness ntawm 12 hli, thiab cov ntaub thaiv npog tuaj yeem tiv taus siab.Qhov chaw nres nkoj tso tawm yuav tsum txaus kom tsis txhob muaj cua sov hauv zos lossis chipping, tab sis qhov tob ntawm qhov chaw nres nkoj feem ntau tsis tshaj 0.03 hli, txwv tsis pub flashing yog ib qho yooj yim.
4. Melting kub
Kev ntsuas tuaj yeem ua tau los ntawm txoj kev dav hlau dav hlau.Ntawm 270-295 ° C, qib ntawm kev txhim kho ntawm GF-PET tuaj yeem teem rau 290-315 ° C.
5. Kev txhaj tshuaj ceev
Kev txhaj tshuaj dav dav yog ceev heev, uas tiv thaiv kev kho ntxov ntawm kev txhaj tshuaj.Tab sis ceev heev, lub siab shear tus nqi ua rau cov khoom nkig.Cov popup feem ntau yuav ua tiav hauv 4 vib nas this.
6, rov qab siab
Qhov qis dua qhov zoo, thiaj li tsis hnav.Feem ntau tsis ntau tshaj 100bar.
Post lub sij hawm: Feb-24-2022