Acrylic Txhaj Tshuaj Molding

Acrylic yog tshuaj hu ua polymethyl methacrylate (PMMA English). Vim yog qhov tsis txaus ntseeg ntawm PMMA nto hardness, Yooj yim, Kev cuam tshuam tsawg, Tsis zoo moulding futiling, lwm yam., Kev hloov kho ntawm PMMA tau tshwm sim ib qho tom qab lwm. Xws li Copolymerization ntawm methyl methacrylate nrog styrene thiab butadiene, Kev Blending PMMA thiab PC, lwm yam.

Kev khiav ntawm PMMA yog qhov phem dua li ntawm PS thiab ABS, thiab cov yaj viscosity yog rhiab heev rau kev hloov kub. Thaum lub sij hawm txheej txheem molding, cov yaj viscosity feem ntau yog hloov los ntawm cov txhaj tshuaj kub. PMMA yog ib qho amorphous polymer nrog melting kub siab tshaj 160 ° C thiab decomposition kub ntawm 270 ° C..

1. Kev ua yas

PMMA muaj qee qhov kev nqus dej, nrog tus nqi nqus dej ntawm 0.3-0.4%, thiab cov av noo ntawm kev txhaj tshuaj molding yuav tsum yog hauv qab no 0.1%, feem ntau 0.04%. Lub xub ntiag ntawm dej ua rau npuas, gas kab, thiab txo cov pob tshab hauv cov yaj. Yog li nws yuav tsum tau qhuav. Qhov kub kom qhuav yog 80-90 ℃, thiab lub sij hawm yog ntau tshaj 3 teev. Cov khoom siv rov ua dua tuaj yeem siv tau 100% qee zaum. Tus nqi tiag nyob ntawm qhov yuav tsum tau ua, feem ntau dhau 30%. Cov khoom siv rov ua dua yuav tsum tsis txhob muaj kuab paug, txwv tsis pub nws yuav cuam tshuam rau cov pob tshab thiab cov khoom ntawm cov khoom tiav.

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2. Txhaj tshuaj molding tshuab xaiv

PMMA tsis muaj cov cai tshwj xeeb rau kev txhaj tshuaj molding tshuab. Vim nws siab yaj viscosity, xav tau ib tug ntxaum ntsia hlau zawj thiab ib tug loj txoj kab uas hla nozzle qhov yuav tsum tau. Yog tias lub zog ntawm cov khoom yog siab dua, ib tug ntsia hlau nrog ib tug loj ntev mus rau txoj kab uas hla piv yuav tsum tau siv rau low-temperature plasticization. Ntxiv thiab, PMMA yuav tsum tau muab khaws cia rau hauv lub hopper qhuav.

3. Pwm thiab rooj vag tsim

Cov pwm kub tuaj yeem yog 60 ℃ -80 ℃, txoj kab uas hla ntawm lub ntsiab khiav yuav tsum phim lub puab taper, Lub kaum sab xis zoo tshaj plaws yog 5 ° txog 7 °, yog tias koj xav txhaj 4 hli lossis ntau dua cov khoom, lub kaum sab xis yuav tsum yog 7 °, thiab txoj kab uas hla ntawm tus khiav yuav tsum ncav cuag 8 rau 10mm, tag nrho ntev ntawm lub rooj vag yuav tsum tsis txhob ntau tshaj 50mm. Rau cov khoom uas muaj phab ntsa thickness tsawg dua 4 hli, Txoj kab uas hla ntawm tus khiav yuav tsum yog 6-8mm

Rau cov khoom nrog phab ntsa thickness ntau dua 4 hli, Txoj kab uas hla khiav yuav tsum yog 8-12mm. Diagonal, kiv cua-zoo li tus thiab tabular rooj vag qhov tob yuav tsum yog 0.7 ua 0,9t (t yog lub thickness ntawm cov khoom phab ntsa), thiab txoj kab uas hla ntawm rab koob rooj vag yuav tsum yog 0.8 rau 2mm; me me yuav tsum tau siv rau cov viscosity tsawg.

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Cov qhov vents feem ntau muaj qhov tob ntawm tsawg dua 0.05 thiab dav ntawm 6mm. Lub kaum sab xis demolding yog nruab nrab ntawm 30′-1° thiab 35′-1° 30 ° hauv kab noj hniav.

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4. Melting kub

Nws tuaj yeem ntsuas los ntawm txoj kev txhaj tshuaj cua: kub ntawm 210 ° C mus rau 270 ° C, nyob ntawm cov ntaub ntawv muab los ntawm tus neeg muag khoom.

Tshem lub rooj zaum rov qab, ua lub nozzle ntawm lub tshuab txhaj tshuaj molding tawm ntawm sprue bushing, thiab ces manually ua plasticization txhaj molding, uas yog cua txhaj molding.

5. Txhaj kub

Kev txhaj tshuaj sai tuaj yeem siv tau, tab sis kom tsis txhob muaj kev ntxhov siab sab hauv, Nws raug nquahu kom siv ntau theem txhaj tshuaj, xws li qeeb-ceev-slow, lwm yam., thaum txhaj cov tuab tuab, siv qeeb ceev.

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6. Lub sijhawm raug kaw

Yog tias qhov kub thiab txias yog 260 ° C, lub sij hawm nyob tsis tau tshaj 10 feeb, thiab yog tias qhov kub thiab txias yog 270 ° C, lub sij hawm nyob tsis tau tshaj 8 feeb.

Yog tias koj muaj lus nug txog kev lag luam yas,plz xav tias dawb nug FLYSE pab pawg,peb yuav muab kev pabcuam zoo tshaj rau koj!

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