I-injection yokubumba ukuzinza kweeplastiki ezicacileyo - i-PMMA, i-PC, i-PET

I-Injection Molding Stability ye-Transparent Plastics-PMMA, PC, PET

Ixesha lokufunda eliqikelelweyo:3 imizuzu, 37 imizuzwana

Ezona plastiki zisetyenziswa ngokuqhelekileyo elubala kwimarike namhlanje ziyi-polymethyl methacrylate (eyaziwa njenge-acrylic okanye i-plexiglass, i-PMMA), i-polycarbonate (i-PC), i-polyethylene terephthalate (PET), inayiloni ecacileyo, i-AS (i-acrylic-styrene copolymer), i-polysulfone (PSF) kwaye nangokunjalo.Iiplastiki ezintathu ezisetyenziswa ngokuqhelekileyo yi-PMMA, i-PC kunye ne-PET.Ngenxa yokunqongophala kwendawo, oku kulandelayo yingxoxo yeepropati kunye nenkqubo yokubumba yesitofu kwezi plastiki zintathu.Unako kwakhonaqhagamshelana neenjineli zethungqo iinkonzo Consulting simahla.

1, PMMA

I-PMMA yePlastiki yeMathiriyeli ekrwada
I-PMMA ine-viscosity ephezulu kunye nokuhamba okungahambi kakuhle, ngoko ke kufuneka ifakwe kwiqondo lokushisa eliphezulu kunye noxinzelelo oluphezulu lwenaliti, apho ubushushu benaliti bunempembelelo enkulu kunoxinzelelo lwenaliti, kwaye ukuphakama koxinzelelo lwenaliti, ngcono Ukuncipha kwemveliso.
Uluhlu lobushushu lokutofa lubanzi, iqondo lobushushu lokunyibilika liyi-160 ℃, ngelixa iqondo lobushushu lokubola lifikelela kuma-270 ℃, ngoko ke uluhlu lohlengahlengiso lobushushu bezinto lubanzi kwaye ukuqhubekeka kungcono.Ke ngoko, ukuphucula ubumanzi, ubushushu benaliti bubalulekile.Impembelelo embi, ukuqina, kulula ukukrazula, ukuqhekeka ngokulula kunye nezinye iingxaki, kufuneka kwandiswe ngokunyusa ubushushu bokubumba, ukuphucula inkqubo yokudibanisa, ukoyisa ezi ziphene.

2, iPC

Iphepha lePC

I-PC ine-viscosity ephezulu, ubushushu obuphezulu bokunyibilika, ukungabikho kwamanzi, ngoko ke kufuneka ibe nenaliti ephezulu yobushushu (phakathi kwe-270-320 ℃), uluhlu oluncinci lohlengahlengiso lobushushu, inkqubo ayilunganga njenge-PMMA, ukusetyenzwa kunzima kancinane PMMA.Uxinzelelo lwenaliti kumbane wempembelelo incinci, kodwa ngenxa ye-viscosity, kusafuneka ibe noxinzelelo olukhulu lwenaliti, oluhambelanayo ukuze kuthintelwe uxinzelelo lwangaphakathi oluveliswayo Ukuthintela uxinzelelo lwangaphakathi, ixesha lokugcina uxinzelelo kufuneka mfutshane kangangoko.

3, PET

Ibhotile ye-PET

Ubushushu bokwenza i-PET buphezulu, kwaye uluhlu lohlengahlengiso lobushushu lezinto eziphathekayo limxinwa (260-300 ℃), ngoko ke ukwenziwa kokwenziwa kumbi, kodwa emva kokunyibilika, ulwelo lulungile.Amandla omatshini kunye nokusebenza akuphezulu emva kwesitofu, kwaye kufuneka kuphuculwe ngenkqubo yokwelula kunye nokuguqulwa kokuphucula ukusebenza.
Ubushushu bomngundo bufuna ukulawulwa ngokuchanekileyo ukuze kuthintelwe i-warpage.Umba obalulekileyo kwi-deformation, ngoko ke isincomo sokubumba komgijimi oshushu.Iqondo lobushushu lokungunda kufuneka libephezulu kungenjalo liya kubangela ukuqaqamba komphezulu okungekuhle kunye nobunzima bokudiliza.

Iziphene kunye nezisombululo zamalungu eplastiki acacileyo

Iziphene malunga noku kulandelayo:

Ingqolowa yesilivere ngokuzaliswa kwe-mold kunye nenkqubo ye-condensation, uxinzelelo lwangaphakathi lwempembelelo ye-anisotropic, isalathiso esithe nkqo soxinzelelo, ukwenzela ukuba i-resin igeleze kwi-orientation, kunye ne-non-flow orientation ukuvelisa isalathisi esahlukileyo se-refractive kunye nokuzalwa kwe-flash filament. , xa isanda, inokwenza ukuba imveliso ibonakale iqhekekile.Ukongeza kwinkqubo yokubumba inaliti kunye nengqalelo yokubumba, iimveliso ezingcono kakhulu zonyango lwe-annealing.Umzekelo, izinto zePC zinokufudunyezwa ukuya kwi-160 ℃ okanye ngaphezulu kwimizuzu eyi-3-5, kwaye emva koko ipholile ngokwemvelo.

Amaqamza omoyangenxa ye-resin ngaphakathi kwamanzi kunye nenye igesi ayikwazi ukukhutshwa, (kwinkqubo ye-condensation ye-mold) okanye ngenxa yokungagcwali ngokwaneleyo, ukunyanzeliswa komphezulu kunye nokukhawuleza ngokukhawuleza kunye nokubunjwa kwamaqamza e-vacuum.

Iglosi yomphezulu embingenxa yoburhabaxa bomngundo, kwelinye icala ukujiya kwangethuba ukuze i-resin ingakwazi ukukopa imo yobuso bokungunda, zonke ezi zenza umphezulu wayo uvelise ukungalingani okuncinci, kwaye imveliso ilahlekelwe yiglosi.

Ukothukaibhekiselele ekubunjweni kwe-ripple exineneyo ukusuka kwisango elithe tye njengeziko, isizathu kukuba i-viscosity ye-melt inkulu kakhulu, izinto zangaphambili ziye zaxinaniswa kwi-cavity, kwaye emva koko izinto zaqhekeka kulo mphezulu wokudibanisa, kwaye umphezulu womothuko.

Inkungu emhlopheikakhulu ngenxa yothuli oluwela kwimathiriyeli ekrwada emoyeni okanye isiqulatho sokufuma kwempahla ekrwada inkulu kakhulu kwaye ibangelwa.

Umsi omhlophe kunye namabala amnyamaikakhulu zibangelwa ukubola okanye ukuwohloka kwe-resin ye-barrel ngenxa yokushisa kwendawo yeplastiki kwi-barrel.

I-injection molding isetyenziswa ngokubanzi kumashishini ahlukeneyo kwaye inokufikelela kwi-seamless, imveliso echanekileyo yobuninzi beengxenye ngexesha elifutshane.I-PorLean Tech ibonelela ngeenkonzo zokubumba inaliti kwizinto ezininzi, kubandakanya iiplastiki kunye ne-elastomers.Ngokululalayisha imodeli yakhokwaye ufumane isicatshulwa esisimahla kunye neengcebiso kwiinkonzo ezinxulumeneyo.