Pet (polyethylene terephthalate)
Ukomisa nokukhazimula ngaphambi kokusebenza kokubumba kokuhlanganisa
Kumele yomiswe ngaphambi kokubumba. Isilwane sizwela kakhulu i-hydrolysis. I-air heansing yokushisa umoya ingu-120-165 c (248-329 f) amahora ama-4. Okuqukethwe komswakama kufanele kube ngaphansi kwe-0,02%.
I-Adopt Ademade Ird System, isikhathi sokumisa sidinga kuphela ama-15mins. Gcina izindleko zamandla cishe ngo-45-50%. Okuqukethwe komswakama kungaba ngu-50-70ppm. (Izinga lokushisa lokumisa, isikhathi sokumisa singashintshwa ngesidingo samakhasimende ezintweni zomiswa, lonke uhlelo lulawulwa yi-Nokia PLC). Futhi kungukucutshungulwa ngomisa futhi kukhazimula ngesikhathi.
Ukuncibilika kokushisa
265-280 c (509-536 F) kumabanga angafakwanga
275-290 c (527-554 F) ngebanga lokuqinisa ingilazi
Izinga lokushisa le-Main
80-120 C (176-248 F); Ibanga Elikhethwayo: I-100-110 C (212-230 F)
Ingcindezi Yomlomo Wezinto Ezibonakalayo
30-130 MPA
Isivinini somlingo
Ijubane eliphakeme ngaphandle kokubangela ukufona
Umshini wokubumba umjovo:
Ukubumba kokuwohloka kusetshenziselwa ikakhulukazi ukuthuthukisa ukubumba kwesilwane. Imvamisa, isilwane singakhiwa kuphela ngumshini wokubumba wesikulufu.
Kungcono ukukhetha isikulufa esiguqukayo ngendandatho ebuyiselwe phezulu, okunobunzima obukhulu bendawo nokugqoka ukumelana, futhi isilinganiso se-Aspect akuyona i-L / D = (15 ~ 20): 1 Compression ratio of 3: 1.
Izinto ezinama-L / D zikhulu kakhulu i-L / D Hlala emgqonyeni isikhathi eside kakhulu, futhi ukushisa ngokweqile kungadala ukonakala futhi kuthinte ukusebenza komkhiqizo. Isilinganiso sokushintshana sincane kakhulu ukukhiqiza ukushisa okuncane, kulula kakhulu ukupristi ukwenza ngeplastishi, futhi kunokwenza kahle. Ngakolunye uhlangothi, ukwephuka kwemicu yengilazi kuzoba okuningi futhi nezindawo zemishini zemicu zizoncishiswa. Lapho i-fiber fiber fieldced pet iyaqiniswa, udonga olungaphakathi lomgqomo lugqokwa kakhulu, futhi umgqomo wenziwa ngento yokuvimbela ukumelana noma ufakwe ezintweni ezibonakalayo zokungamelana nalokhu.
Njengoba i-nozzle imfushane, udonga lwangaphakathi ludinga ukuba ngumhlabathi futhi ukuthambekela kufanele kube kukhulu ngangokunokwenzeka. I-nozzle yohlobo lwe-hydraulic brake valve luhle. Ama-nozzles kufanele abe nezinyathelo nezindlela zokulawula izinga lokushisa ukuze aqinisekise ukuthi ama-nozzles awahambisanga futhi avimbe. Kodwa-ke, izinga lokushisa lama-nozzle akufanele liphezulu kakhulu, uma kungenjalo lizodala ukuqina. Izinto ze-pp ye-PP ephansi kumele zisetshenziswe futhi umgqomo uhlanzwe ngaphambi kokuqala ukwakha.
Izimo eziphambili zokubumba izimbotshana zezilwane ezifuywayo
1, izinga lokushisa lomgqomo.Uhla lokushisa lokubumba isilwane esincane luncane, futhi izinga lokushisa lizothinta ngqo ukusebenza komkhiqizo. Uma izinga lokushisa liphansi kakhulu, akukuhle ukuppisa izingxenye zepulasitiki, ama-dents, kanye nokuntuleka kwezici ezibonakalayo; Ngokuphambene nalokho, uma izinga lokushisa liphezulu kakhulu, lizodala ukugoqa, ama-nozzles azogeleza, umbala uyoba mnyama, amandla omshini azokwehla, futhi aze anciphe. Ngokuvamile, izinga lokushisa le-barrel lilawulwa ngo-240 kuya ku-280 ° C, futhi i-fiber fiber ukuqiniswa kwe-pet barrel lokushisa lingama-250 kuya ku-290 ° C. izinga lokushisa le-nozzle akufanele lidlule ngaphansi kokushisa kwe-barnel.
2, lokushisa lokubumba.Ukushisa okubumba kuthinta ngqo isilinganiso sokupholisa kanye ne-crystaltaltity of the milet, i-crystallity yehlukile, futhi izakhiwo zezitho zepulasitiki nazo zihlukile. Imvamisa, izinga lokushisa elibumba lilawulwa ngo-100 kuye ku-140 ° C. Kunconywa amanani amancane lapho kwakheka izingxenye zepulasitiki ezidongeni elidongeni. Lapho wenza izingxenye zepulasitiki ezinodonga olubi, kunconywa ukuba ube nenani elikhulu.
3. Ukucindezela komjovo.Isilwane sincibilike uketshezi futhi kulula ukwakha. Imvamisa, ingcindezi ephakathi iyasetshenziswa, ingcindezi ingu-80 kuya ku-140 MPA, futhi isilwane esiqinisiwe se-fiber-fiber-sinengcindezi yomjovo ongu-90 kuye kwayi-150 MPA. Ukucindezela komjovo kufanele kunqunywe ngokubheka ukubonwa kwesilwane esifuywayo, uhlobo kanye nenani le-filler, indawo kanye nosayizi wesango, izinga lokushisa le-incword, kanye nohlobo lomshini wokubumba womuntu.
Wazi kangakanani ngokucutshungulwa kwamapulasitiki wezilwane?
1, ukucubungula kwepulasitiki
Njengoba ama-pet macromolecule aqukethe isisekelo se-lipid futhi abe ne-hydrophility ethile, izinhlayiya zizwela emanzini emazingeni okushisa aphezulu. Lapho okuqukethwe komswakama kudlula umkhawulo, isisindo se-moleemale sesilwane siyancipha, futhi umkhiqizo unemibala futhi uba brittle. Kulokhu, okuqukethwe kumele zomiswe ngaphambi kokucutshungulwa. Amazinga okushisa okomisa angamahora angama-150, imvamisa amahora angama-170 kuya kwayi-4. Indlela ye-Air Jet isetshenziselwa ukuvivinya ukuthi ngabe impahla yomile ngokuphelele.
2. Ukukhetha ngomshini wokubumba umjovo
I-PET inephuzu elifushane lokuncibilika kanye nephuzu eliphakeme elibi, ngakho-ke kuyadingeka ukukhetha uhlelo lomjovo olunobubanzi bokulawulwa kwezinga lokushisa nokuzikhandla ngesikhathi sokuzikhandla, futhi isisindo sangempela somkhiqizo asinakuba ngaphansi kuka-2/3 wesisindo saso. Inani lomjovo womshini. Ngokusekelwe kulezi zidingo, eminyakeni yamuva nje, uRamada usungule uchungechunge lwezinhlelo ezikhethekile ezilinganayo zeplastiki. Amandla akhethiwe akhethiwe akhulu kune-6300T / M2.
3. I-Mold ne-Gate Design
Izisetshenziswa zezilwane zasekhaya zivame ukwakhiwa yi-Hot Runner isikhunta. Isihlangu sokushisa phakathi kokubumba kanye nomshini wokubumba umjovo kunconywa ngobukhulu obungu-12 mm, kanti nesihlangu sokushisa sikwazi ukubekezelela ingcindezi ephezulu. Itheku lokuphelelwa amandla kumele linele ukugwema ukunqwala kwendawo noma ukushibilika, kepha ukujula kwetheku lokuphelelwa yisikhathi kuvame ukungadluli ku-0.03 mm, ngaphandle kwalokho kukhanye.
4. Ukushisa okuncibilikayo
Ukulinganiswa kungenziwa nge-Air jet indlela. Ku-270-295 ° C, izinga lokuthuthuka kwe-GF-Pet lingasetwa ku-290-315 ° C.
I-5. Isivinini somlingo
Isivinini sokujova okujwayelekile sishesha kakhulu, esivimbela ukwelashwa ekuqaleni komjovo. Kepha ngokushesha okukhulu, izinga eliphakeme le-shear lenza okubonakalayo. I-popup izoqedwa ngemizuzwana emi-4.
6, ingcindezi emuva
Engeza kangcono, ukuze ungagqoki. Ngokuvamile akukho ngaphezulu kwe-100bar.
Isikhathi sePosi: Feb-24-2022