ʻO ka inoa kemika o ka acrylic he polymethylmethacrylate (PMMA ma ka ʻōlelo Pelekania). Ma muli o nā hemahema o ka PMMA e like me ka haʻahaʻa haʻahaʻa o ka ʻili, ka maʻalahi o ka hamo ʻana, ka haʻahaʻa haʻahaʻa haʻahaʻa, a me ka maikaʻi ʻole o ka hoʻoheheʻe ʻana, ua ʻike ʻia nā hoʻololi o ka PMMA ma hope o kekahi. E like me ka copolymerization o ka methyl methacrylate me ka styrene a me ka butadiene, ka hui ʻana o PMMA a me PC, etc.
Ka hana kahe oPMMAʻoi aku ka maikaʻi ma mua o ka PS a me ABS, a ʻoi aku ka maʻalahi o ka hoʻoheheʻe ʻana i nā loli wela. I ka wā o ke kaʻina hana, hoʻololi nui ʻia ka viscosity melt ma muli o ka mahana injection. ʻO ka PMMA kahi polymer amorphous me ka wela hoʻoheheʻe ʻoi aku ma mua o 160°C a me ka mahana decomposition o 270°C.
1. Ka hoʻolei ʻana i nā plastics
Loaʻa i ka PMMA kekahi degere o ka hoʻoheheʻe wai, me ka nui o ka wai o ka 0.3-0.4%. Pono ka hoʻoheheʻe ʻana i kahi haʻahaʻa ma lalo o 0.1%, maʻamau 0.04%. ʻO ka loaʻa ʻana o ka wai e hoʻoulu ai i nā ʻōhū, nā ea, a me ka hōʻemi ʻana i ke aniani o ka heheʻe. No laila pono e maloʻo. ʻO 80-90 ka mahana maloʻo℃a ʻoi aku ka manawa maloʻo ma mua o 3 mau hola. Hiki ke hoʻohana ʻia nā mea hana hou i 100% i kekahi mau hihia. ʻO ka nui maoli e pili ana i nā koi maikaʻi, ʻoi aku ma mua o 30%. Pono e pale ʻia nā mea hana hou mai ka hoʻohaumia ʻana, inā ʻaʻole ia e pili i ka ʻike a me nā waiwai o ka huahana i hoʻopau ʻia.
2. Ke kohoʻana i ka mīkini hoʻoheheʻe injection
ʻAʻohe koi kūikawā o ka PMMA no nā mīkini hoʻoheheʻe injection. Ma muli o kona kiʻekiʻe hoʻoheheʻe viscosity, pono ia i kahi hohonu hohonu a me kahi puka nozzle nui. Inā ʻoi aku ka kiʻekiʻe o nā koi ikaika o ka huahana, pono e hoʻohana ʻia kahi wili me kahi lākiō ʻoi aku ka nui no ka plasticization haʻahaʻa haʻahaʻa. Eia kekahi, pono e mālama ʻia ka PMMA i loko o kahi pahu maloʻo.
3. Mold a me ka hoʻolālā puka
Hiki ke 60 ka mahana o ka mold℃-80℃. Pono ke anawaena o ke auwai nui me ka lipi o loko. ʻO 5 ka huina kūpono° i ka 7°. Inā makemake ʻoe e hoʻoheheʻe i ka 4mm a i ʻole nā huahana ma luna, ʻo ke kihi he 7° a he 8 a 8 ke anawaena o ke kahawai nui°. 10mm, ʻaʻole pono ka lōʻihi o ka puka ma mua o 50mm. No nā huahana me ka mānoanoa pā ma lalo o 4mm, pono ke anawaena o ke kahawai kahe he 6-8mm
No nā huahana me ka mānoanoa pā i ʻoi aku ma mua o 4mm, ʻo ke anawaena o ka mea kukini he 8-12mm. He 0.7 a 0.9t ka hohonu o ka puka diagonal, ʻano peʻa a me ke kūpaʻa (t ka mānoanoa o ka pā o ka huahana). ʻO ke anawaena o ka puka nila he 0.8 a 2mm; pono e koho ʻia ka liʻiliʻi liʻiliʻi no ka haʻahaʻa viscosity.
Aia nā puka puka maʻamau i loko o 0.05 hohonu, 6 mm ākea, a ʻo ke kihi huki ma waena o 30.'-1° a aia ka ʻāpana o ka lua ma waena o 35'-1°30°.
4. Ka wela hehee
Hiki ke ana ʻia e ke ʻano hoʻoheheʻe in-air: mai ka 210℃i 270℃, ma muli o ka ʻike i hāʻawi ʻia e ka mea hoʻolako.
E haʻalele i ka noho hope, e haʻalele i ka nozzle mīkini hoʻoheheʻe ʻia i ke kahawai nui, a laila hana lima lima i ka hoʻoheheʻe ʻia ʻana, ʻo ia ka hoʻoheheʻe ʻana i ka ea.
5. Injection wela
Hiki ke hoʻohana i ka hoʻokēʻai wikiwiki, akā no ka pale ʻana i ke koʻikoʻi o loko, ʻoi aku ka maikaʻi o ka hoʻohana ʻana i ka injection multi-stage, e like me ka slow-fast-slow, etc.
6. Noho manawa
Inā he 260 ka mahana°C, ʻaʻole hiki i ka manawa noho ma mua o 10 mau minuke. Inā he 270 ka mahana°C, ʻaʻole hiki i ka manawa noho ma mua o 8 mau minuke.
ZAOGE Film CrusherHe kūpono ia no ka ʻoki ʻana i nā mea ʻōpala palupalu palupalu a paʻakikī me ka mānoanoa o 0.02 ~ 5MM, e like me nā kiʻi ʻoniʻoni PP/PE/PVC/PS/GPPS/PMMA, nā pepa, a me nā papa i hoʻohana ʻia i nā mea kākau, paʻi, a me nā ʻoihana ʻē aʻe.
Hiki ke hoʻohana ʻia e hōʻiliʻili, ʻohi a lawe i nā mea ʻōpala i hana ʻia e nā extruders, laminators, nā mīkini pepa, a me nā mīkini pā. No ka laʻana, lawe ʻia nā mea i ʻoki ʻia e ka mea hoʻoili ma o ka pipeline i kahi mea hoʻokaʻawale cyclone, a laila hoʻokuʻu ʻia i loko o ka extruder screw feed port e kahi wili hānai no ka hui ʻana me nā mea hou, no laila e loaʻa koke ai ka palekana a me ka hoʻohana ʻana.
Ka manawa hoʻouna: Jul-01-2024
