Injection Molding Kwanciyar Ƙarfafan Filastik - PMMA, PC, PET
Kiyasta lokacin karantawa:Minti 3, dakika 37
Filayen filastik da aka fi amfani da su a kasuwa a yau sune polymethyl methacrylate (wanda aka fi sani da acrylic ko plexiglass, PMMA), polycarbonate (PC), polyethylene terephthalate (PET), nailan m, AS (acrylic-styrene copolymer), polysulfone (PSF) da sauransu.Filayen filastik guda uku da aka fi amfani dasu sune PMMA, PC da PET.Saboda matsalolin sararin samaniya, mai zuwa shine tattaunawa game da kaddarorin da tsarin yin allura na waɗannan robobi guda uku.Hakanan zaka iyatuntuɓi injiniyoyinmukai tsaye don sabis na shawarwari kyauta.
1, PMMA
PMMA Plastic Raw Material
PMMA yana da danko mai yawa kuma dan kadan mara nauyi, don haka dole ne a yi masa allura a yanayin zafi mai yawa da kuma matsananciyar allura, inda zafin allurar yana da tasiri fiye da karfin allurar, kuma mafi girman karfin allurar, mafi kyau. raguwar samfurin.
Injection zafin jiki kewayon ne m, da narkewa zafin jiki ne 160 ℃, yayin da bazuwar zafin jiki kai 270 ℃, don haka kayan zafin jiki daidaita kewayon ne fadi da kuma processability ne mafi alhẽri.Sabili da haka, don inganta yawan ruwa, zafin allurar yana da mahimmanci.Rashin tasiri mara kyau, karko, mai sauƙi don karewa, sauƙi ga raguwa da sauran matsalolin, ya kamata a ƙara ta hanyar ƙara yawan zafin jiki, inganta tsarin ƙaddamarwa, don shawo kan waɗannan lahani.
2, PC
PC takardar
PC yana da babban danko, high narke zafin jiki, matalauta liquidity, sabili da haka dole ne ya zama mafi girma zazzabi allura (tsakanin 270-320 ℃), in mun gwada da kunkuntar kewayon kayan zafin jiki daidaitawa, da tsari ne ba a matsayin mai kyau kamar yadda PMMA, aiki ne dan kadan mafi wuya fiye da. PMMA.matsa lamba na allura a kan tasirin tasirin yana da ƙananan, amma saboda danko, har yanzu yana buƙatar zama matsa lamba mafi girma, wanda ya dace don hana damuwa na ciki da aka haifar Domin hana matsalolin ciki, lokacin da za a kula da matsa lamba ya kamata ya kasance. a takaice kamar yadda zai yiwu.
3, PET
kwalban PET
PET samar da zazzabi yana da girma, kuma kewayon daidaita yanayin zafin jiki yana da kunkuntar (260-300 ℃), don haka masana'anta ba su da kyau, amma bayan narkewa, ruwa yana da kyau.Ƙarfin injina da aikin ba su da girma bayan allura, kuma dole ne a inganta ta hanyar tsarin shimfidawa da gyare-gyare don inganta aikin.
Ana buƙatar sarrafa zafin jiki daidai don hana yaƙe-yaƙe.Wani muhimmin mahimmanci a cikin nakasawa, saboda haka shawarwarin ga masu tsalle-tsalle masu zafi.Yanayin zafin jiki yana buƙatar zama babba in ba haka ba zai haifar da ƙarancin kyalli da matsaloli a cikin lalata.
Rashin lahani da mafita ga sassa na filastik m
Lalacewar sun kusan kamar haka:
Hatsi na azurfa ta hanyar cikowar ƙira da tsari, tasirin anisotropic na danniya na ciki, madaidaiciyar shugabanci na damuwa, don haka guduro yana gudana akan daidaitawa, da rashin kwararar juzu'i don samar da ma'anar refractive daban-daban da haihuwar filament filament. , lokacin da ya faɗaɗa, na iya sa samfurin ya zama fashe.Bugu da kari ga allura gyare-gyaren tsari da mold hankali, mafi kyau kayayyakin for annealing jiyya.Misali, PC kayan za a iya mai tsanani zuwa 160 ℃ ko fiye na 3-5 minutes, sa'an nan sanyaya ta halitta.
Kumfa na iskasaboda guduro a cikin ruwa da sauran iskar gas ba za a iya fitarwa, (a cikin mold condensation tsari) ko saboda kasa cika, condensing surface da kuma sauri condensation da samuwar injin kumfa.
Rashin kyalli mara kyausaboda kaushin gyambon, a daya bangaren kuma yana takushewa da wuri ta yadda resin ba zai iya kwafin yanayin saman ba, duk wadannan suna sa samansa ya yi kankanin rashin daidaito, kuma samfurin ya rasa kyalli.
Girgiza kaiyana nufin samuwar ripple mai yawa daga madaidaiciyar kofa a matsayin tsakiya, dalilin shi ne dankowar narke ya yi yawa, kayan gaba sun taru a cikin rami, sa'an nan kayan ya fashe ta wannan farfajiyar narke, kuma saman gigin girgiza.
Farin hazogalibi saboda ƙurar da ke faɗowa cikin ɗanyen abu a cikin iska ko kuma ɗanɗanon ɗanyen ya yi girma da yawa kuma yana haifar da shi.
Farin hayaki da baƙar fataMafi yawa yana faruwa ne sakamakon ruɓewa ko lalacewar guzurin ganga saboda zafin gida na filastik a cikin ganga.
Ana amfani da gyare-gyaren allura a ko'ina a masana'antu daban-daban kuma yana iya cimma daidaitaccen samar da sassa a cikin ɗan gajeren lokaci.PorLean Tech yana ba da sabis na gyare-gyaren allura don abubuwa da yawa, gami da robobi da elastomers.Kawailoda samfurin kukuma sami saurin faɗi da shawara akan ayyuka masu alaƙa.
Lokacin aikawa: Afrilu-12-2022