Txhaj tshuaj molding txheej txheem ntawm organic iav (PMMA)

PMMA feem ntau hu ua organic iav, acrylic, thiab lwm yam. Lub npe tshuaj yog polymethyl methacrylate. Vim muaj qhov tsis zoo ntawm PMMA, xws li qhov tsis zoo ntawm qhov tawv, khawb yooj yim, tsis tshua muaj kev cuam tshuam, kev ua haujlwm tsis zoo ntawm cov pwm, thiab lwm yam, PMMA resin yog non-toxic thiab environmentally friendly, tuaj yeem siv los tsim cov tais diav, khoom noj khoom haus, thiab lwm yam. , thiab muaj tshuaj lom neeg ruaj khov thiab huab cua tsis kam, yog li kev hloov kho ntawm PMMA tau tshwm sim ib tom qab. Piv txwv li, copolymerization ntawm methyl methacrylate nrog styrene thiab butadiene, nrog rau kev sib xyaw ntawm PMMA thiab PC.
Cov khoom siv PMMA (Jinyang ntsia hlau)
PMMA muaj cov dej ntws tsis zoo dua li PS thiab ABS, thiab nws cov viscosity yaj yog rhiab rau qhov kub thiab txias. Thaum lub sij hawm molding txheej txheem, cov yaj viscosity feem ntau yog hloov los ntawm kev txhaj tshuaj kub. PMMA yog amorphous polymer nrog melting kub siab tshaj 160 degree thiab decomposition kub ntawm 270 degree. Xav txog ntau yam ntawm PMMA, nws cov txheej txheem molding yuav tsum pib los ntawm cov hauv qab no.
1, Kev ua cov yas
PMMA muaj qee qhov kev nqus dej, nrog rau qhov nqus dej ntawm {{{0}}}3-0.4 feem pua ​​, thaum txhaj tshuaj molding yuav tsum tau kub qis dua 0.1 feem pua ​​, feem ntau 0.04 feem pua. Lub xub ntiag ntawm dej ua rau npuas, cov kab cua, thiab txo cov pob tshab hauv cov yaj. Yog li nws yuav tsum tau qhuav. Qhov kub kom qhuav yog 80-90 degree, thiab lub sij hawm yog ntau tshaj 3 teev. Cov ntaub ntawv rov qab tuaj yeem siv tau 100 feem pua ​​​​hauv qee qhov xwm txheej, thiab tus nqi tiag tiag nyob ntawm qhov yuav tsum tau ua, feem ntau tshaj 30 feem pua. Cov khoom siv rov ua dua tshiab yuav tsum tsis txhob muaj kuab paug, txwv tsis pub nws yuav cuam tshuam rau pob tshab thiab cov khoom ntawm cov khoom tiav.
2, Kev xaiv ntawm kev txhaj tshuaj molding tshuab
PMMA tsis muaj cov cai tshwj xeeb rau kev txhaj tshuaj molding tshuab. Vim nws cov viscosity siab, cov ntsia hlau sib sib zog nqus grooves thiab cov kab loj dua nozzle qhov yuav tsum tau ua. Yog tias muaj qhov yuav tsum tau ua rau lub zog ntawm cov khoom, lub hau ntswj nrog qhov sib piv loj dua yuav tsum tau siv rau cov yas yas qis. Tsis tas li ntawd, PMMA yuav tsum siv lub hopper qhuav rau kev khaws cia.
3, Pwm thiab rooj vag tsim
1. Cov pwm kub tuaj yeem nyob nruab nrab ntawm 60 degree -80 degree , thiab txoj kab uas hla ntawm lub ntsiab khiav yuav tsum sib phim rau sab hauv taper. Lub kaum sab xis zoo yog 5 degree txog 7 degree. Yog tias txhaj tshuaj molding ntawm 4 hli lossis ntau dua cov khoom yuav tsum tau, lub kaum sab xis yuav tsum yog 7 degree. Txoj kab uas hla ntawm lub ntsiab khiav tuaj yeem ncav cuag 8 mus rau 10mm, thiab qhov ntev ntawm lub rooj vag yuav tsum tsis pub tshaj 50mm.
2. Rau cov khoom uas muaj phab ntsa thickness tsawg dua 4 hli, txoj kab uas hla ntawm cov ntws channel yuav tsum yog 6-8mm. Rau cov khoom uas muaj phab ntsa thickness ntau dua 4 hli, qhov ntws channel txoj kab uas hla yuav tsum yog 8-12mm.
3. Qhov tob ntawm qhov ntxeev ntawm ntug, sector, thiab ntsug rooj vag yuav tsum yog 0.7 mus rau 0.9t (t yog lub thickness ntawm cov khoom phab ntsa), thiab txoj kab uas hla ntawm rab koob rooj vag yuav tsum be 0.8 mus rau 2mm; Cov me me yuav tsum tau siv rau cov khoom uas muaj viscosity tsawg. Cov qhov tso pa tawm yuav tsum yog 0.05 txog 0.07mm tob thiab 6mm dav
4. Lub demolding lub kaum sab xis yog nruab nrab ntawm 30 '-1 degree thiab kab noj hniav yog nruab nrab ntawm 35' -1 degree thiab 30 degree .
4, Melting kub
Nws tuaj yeem ntsuas los ntawm txoj kev txhaj tshuaj huab cua: xws li 210 degree txog 270 degree, nyob ntawm cov ntaub ntawv muab los ntawm tus neeg muag khoom.
5, Kev txhaj tshuaj kub
Kev txhaj tshuaj nrawm tuaj yeem siv tau, tab sis kom tsis txhob muaj kev ntxhov siab sab hauv, kev txhaj tshuaj ntau theem yuav tsum tau siv, xws li qeeb qeeb qeeb, thiab lwm yam. Thaum txhaj cov tuab tuab, yuav tsum siv qhov nrawm nrawm.
6, Lub sijhawm khaws cia
Yog tias qhov kub thiab txias yog 260 degree, lub sijhawm khaws cia yuav tsum tsis pub tshaj 10 feeb, thiab yog tias qhov kub thiab txias yog 270 degree, lub sijhawm khaws cia yuav tsum tsis pub tshaj 8 feeb.