Lisebelisoa tsa PMMA hangata li tsejoa e le plexiglass, acrylic, joalo-joalo Lebitso la lik'hemik'hale ke polymethyl methacrylate. PMMA ke thepa e seng chefo le tikoloho. Ntho e kholo ka ho fetisisa ke ponaletso e phahameng, e nang le khanya ea 92%. E nang le lisebelisoa tse ntle ka ho fetisisa tsa khanya, phetisetso ea UV e boetse e fihla ho 75%, 'me thepa ea PMMA e boetse e na le botsitso bo botle ba lik'hemik'hale le ho hanyetsa boemo ba leholimo.
Lisebelisoa tsa PMMA acrylic li atisa ho sebelisoa e le maqephe a acrylic, li-pellets tsa polasetiki tsa acrylic, mabokose a khanyang a acrylic, libate tsa acrylic, joalo-joalo Lihlahisoa tse sebelisoang tsa tšimo ea likoloi ke mabone a likoloi, mabone a pontšo, lisebelisoa tsa lisebelisoa, joalo-joalo, indasteri ea meriana (polokelo ea mali). lijana), lisebelisoa tsa indasteri (li-video discs, light diffuser)), likonopo tsa lihlahisoa tsa elektroniki (haholo-holo tse pepeneneng), thepa ea bareki (seno likopi, lingoloa, joalo-joalo).
Mokelikeli oa thepa ea PMMA o mpe ho feta oa PS le ABS, 'me viscosity e qhibilihisitsoeng e na le maikutlo a ho fetoha ha mocheso. Ts'ebetsong ea ho bopa, mocheso oa ente o sebelisoa haholo ho fetola viscosity ea ho qhibiliha. PMMA ke polymer ea amorphous e nang le mocheso o qhibilihang o fetang 160 ℃ le mocheso oa ho bola oa 270 ℃. Mekhoa ea ho bopa ea lisebelisoa tsa PMMA e kenyelletsa ho lahla,ho bopa ka ente, mechine, thermoforming, joalo-joalo.
1. Kalafo ea polasetiki
PMMA e na le mokhoa o itseng oa ho monya metsi, 'me tekanyo ea ho monya metsi ke 0.3-0.4%,' me mocheso oa ho etsa ente o tlameha ho ba ka tlase ho 0.1%, hangata 0.04%. Boteng ba metsi bo etsa hore ho qhibiliha ho bonahale eka ke li-bubble, likhase tsa khase le ho fokotsa pepenene. Kahoo e hloka ho omisoa. Mocheso oa ho omisa ke 80-90 ℃, 'me nako e feta lihora tse 3.
Maemong a mang, 100% ea lisebelisoa tse tsosolositsoeng li ka sebelisoa. Chelete ea sebele e itšetlehile ka litlhoko tsa boleng. Hangata, e ka feta 30%. Thepa e tsosolositsoeng e lokela ho qoba ho silafala, ho seng joalo e tla ama ho hlaka le thepa ea sehlahisoa se felileng.
2. Khetho ea mochini oa ho bopa ente
PMMA ha e na litlhoko tse khethehileng tsa mochini oa ho bopa ente. Ka lebaka la viscosity ea eona e phahameng ea ho qhibiliha, ho hlokahala sekoti se tebileng sa screw groove le lesoba le leholoanyane la nozzle. Haeba matla a sehlahisoa a hlokahala hore a be a phahameng, sekoti se nang le karolo e kholoanyane se lokela ho sebelisoa bakeng sa polasetiki e tlaase ea mocheso. Ho feta moo, PMMA e tlameha ho bolokoa ka har'a hopper e omeletseng.
3. Moqapi oa hlobo le heke
Thempereichara ea hlobo e ka ba 60℃-80℃. Bophara ba sprue bo lokela ho lumellana le taper e ka hare. Sebaka se setle ka ho fetisisa ke 5° ho isa ho 7°. Haeba u batla ho kenya lihlahisoa tsa 4mm kapa ho feta, angle e lokela ho ba 7 °, 'me bophara ba sprue e be 8 °. Ho fihla ho 10mm, bolelele ba heke ka kakaretso ha boa lokela ho feta 50mm. Bakeng sa lihlahisoa tse nang le botenya ba lebota ka tlase ho 4mm, bophara ba semathi e lokela ho ba 6-8mm, 'me bakeng sa lihlahisoa tse nang le botenya ba lebota ho feta 4mm, bophara ba semathi e lokela ho ba 8-12mm.
Botebo ba liheke tse diagonal, tse bōpehileng joaloka fene le tse otlolohileng li lokela ho ba 0.7 ho isa ho 0.9t (t ke botenya ba lerako la sehlahisoa), 'me bophara ba heke ea nale e lokela ho ba 0.8 ho 2mm; bakeng sa viscosity e tlaase, boholo bo fokolang bo lokela ho sebelisoa. Likoti tse tloaelehileng tsa moea ke 0.05 ho isa ho 0.07mm botebo le 6mm ka bophara.Moepa oa ho theola o pakeng tsa 30'-1 ° le 35'-1 ° 30 ° karolong ea cavity.
4. Mocheso o qhibilihang
E ka lekanyetsoa ka mokhoa oa ente ea moea: ho tloha ho 210 ℃ ho isa ho 270 ℃, ho latela lintlha tse fanoeng ke mofani oa thepa.
5. Mocheso oa ente
Ente e potlakileng e ka sebelisoa, empa ho qoba khatello e phahameng ea ka hare, ho lokela ho sebelisoa ente ea mekhahlelo e mengata, joalo ka butle-butle-e liehang, joalo-joalo Ha u kenya likarolo tse teteaneng, sebelisa lebelo le liehang.
6. Nako ea bolulo
Haeba mocheso o le 260 ℃, nako ea bolulo ha ea lokela ho feta metsotso e 10 ka ho fetisisa, 'me haeba mocheso o le 270 ℃, nako ea bolulo ha ea lokela ho feta metsotso e 8.
Nako ea poso: May-25-2022
