I-PET (iPolyethylene terephthalate)
Ukomisa kunye nokuQinisekisa phambi kokwenziwa kwe-Injection yokubumba
Kufuneka yomiswe phambi kokubunjwa.I-PET ivakalelwa kakhulu kwi-hydrolysis.Isishicileli somoya esiqhelekileyo singu-120-165 C (248-329 F) iiyure ezi-4.Isiqulatho sokufuma kufuneka sibe ngaphantsi kwe-0.02%.
Yamkela inkqubo ye-ODEMADE IRD, ixesha lokumisa lifuna kuphela i-15mins.Gcina iindleko zamandla malunga ne-45-50%.Isiqulatho sokufuma singaba yi-50-70ppm.(Iqondo lokushisa lokumisa, ixesha lokumisa linokulungelelaniswa yimfuneko yabathengi kwizinto zokumisa, yonke inkqubo ilawulwa yi-Siemens PLC).Kwaye kukusetyenzwa ngokomisa kunye nokuQinisekisa ngexesha.
Ubushushu obunyibilikayo
265-280 C (509-536 F) kumabakala angazaliswanga
275-290 C (527-554 F) yomgangatho wokuqinisa iglasi
Ubushushu bomngundo
80-120 C (176-248 F);Uluhlu olukhethwayo: 100-110 C (212-230 F)
Uxinzelelo lwenaliti yezinto eziphathekayo
30-130 MPa
Isantya sokutofa
Isantya esiphezulu ngaphandle kokubangela i-embrittlement
Umatshini wokubumba wokutofa:
Isitofu sokubumba sisetyenziswa ikakhulu ukuphucula ukubunjwa kwePET.Ngesiqhelo, i-PET inokwenziwa kuphela ngomatshini wokubumba inaliti yesikrufu.
Kungcono ukhethe i-screw eguquguqukayo kunye nendandatho ebuyela umva phezulu, enobunzima obukhulu bomhlaba kunye nokumelana nokunxiba, kunye nomlinganiselo we-aspect ratio ayikho L / D = (15 ~ 20): 1 umlinganiselo woxinzelelo we-3: 1.
Izixhobo ezine-L / D enkulu kakhulu zihlala emgqomeni ixesha elide, kwaye ukushisa okugqithisileyo kunokubangela ukuthotywa kunye nokuchaphazela ukusebenza kwemveliso.Umlinganiselo wokunyanzeliswa uncinci kakhulu ukwenza ubushushu obuncinci, kulula ukwenza iplastiki, kwaye awusebenzi kakuhle.Ngakolunye uhlangothi, ukuphulwa kweefayili zeglasi kuya kuba ngaphezulu kwaye iimpawu zomatshini zemicu ziya kuncitshiswa.Xa i-fiber yeglasi iqiniswe i-PET iqiniswe, udonga lwangaphakathi lombhobho lugugile kakhulu, kwaye umbhobho wenziwa ngempahla enqabileyo okanye ifakwe kwizinto ezinqabileyo zokugqoka.
Ekubeni i-nozzle imfutshane, udonga lwangaphakathi lufuna ukuba lube phantsi kwaye i-aperture kufuneka ibe nkulu ngokusemandleni.Umlomo wohlobo lwevalve ye-hydraulic brake ulungile.Imilomo kufuneka ibe namanyathelo okugquma kunye nokulawula ubushushu ukuqinisekisa ukuba imilomo ayikhexi kwaye ivaleke.Nangona kunjalo, ukushisa kwe-nozzle akufanele kube phezulu kakhulu, ngaphandle koko kuya kubangela i-runny.Uxinzelelo oluphantsi lwePP kufuneka lusetyenziswe kwaye umgqomo ucocwe ngaphambi kokuba uqale ukwenza.
Iimeko eziphambili zokubunjwa kwesitofu kwi-PET
1, ubushushu bombhobho.Uluhlu lweqondo lokushisa lokubumba lwe-PET luncinci, kwaye ukushisa kuya kuchaphazela ngokuthe ngqo ukusebenza kwemveliso.Ukuba amaqondo obushushu aphantsi kakhulu, akulunganga ukwenza iplastiki iinxalenye zeplastiki, izibonda, kunye nokungabikho kweziphene zezinto;ngokuchaseneyo, ukuba iqondo lokushisa liphezulu kakhulu, liya kubangela ukutshiza, i-nozzles iya kuhamba, umbala uya kuba mnyama, amandla omatshini aya kuncipha, kunye nokuthotywa kuya kwenzeka.Ngokuqhelekileyo, iqondo lokushisa lombhobho lilawulwa kwi-240 ukuya kwi-280 ° C, kwaye i-fiber yeglasi iqiniswe kwi-PET ye-barrel ye-250 ukuya kwi-290 ° C. Ukushisa kwe-nozzle akufanele kudlule i-300 ° C, kwaye ubushushu bombhobho buhlala buphantsi. kunobushushu bomphanda.
2, iqondo lobushushu ngundo.Iqondo lokushisa lokubunjwa lichaphazela ngokuthe ngqo izinga lokupholisa kunye ne-crystallinity yokunyibilika, i-crystallinity iyahluka, kwaye iipropati zeengxenye zeplastiki nazo zihluke.Ngesiqhelo, iqondo lobushushu lokungunda lilawulwa kwi-100 ukuya kwi-140 °C.Amaxabiso amancinci acetyiswayo xa kusenziwa iinxalenye zeplastiki ezinodonga olucekethekileyo.Xa usenza iinxalenye zeplastiki ezinodonga olungqingqwa, kuyacetyiswa ukuba ube nexabiso elikhulu.
3. Uxinzelelo lwesitofu.I-PET inyibilika ilulwelo kwaye kulula ukuyibumba.Ngokuqhelekileyo, uxinzelelo oluphakathi lusetyenziswa, uxinzelelo luyi-80 ukuya kwi-140 MPa, kunye ne-glass fiber-reinforced PET inoxinzelelo lwe-injection ye-90 kwi-150 MPa.Uxinzelelo lwenaliti kufuneka lugqitywe ngokuthathela ingqalelo i-viscosity ye-PET, uhlobo kunye nobungakanani bokugcwalisa, indawo kunye nobukhulu besango, imilo kunye nobungakanani benxalenye yeplastiki, ubushushu bokubumba, kunye nohlobo lomatshini wokubumba inaliti. .
Wazi kangakanani malunga nokusetyenzwa kweeplastiki zePET?
1, ukulungiswa kweplastiki
Ekubeni i-PET macromolecules iqulethe isiseko se-lipid kwaye ine-hydrophilicity ethile, iinqununu zivakalelwa kumanzi kumaqondo aphezulu.Xa ubumanzi bungaphezu komlinganiselo, ubunzima bemolekyuli bePET buyancipha, kwaye imveliso iba nemibala kwaye iba brittle.Kule meko, izinto eziphathekayo kufuneka zomiswe ngaphambi kokucubungula.Ubushushu bokomisa yi-150 4 iiyure, ngokuqhelekileyo 170 3 ukuya kwiiyure ezine.Indlela yejethi yomoya isetyenziselwa ukuvavanya ukuba ingaba impahla yomile ngokupheleleyo.
2. Ukukhethwa komatshini wokubumba inaliti
I-PET inendawo emfutshane yokunyibilika kunye nenqanaba eliphezulu lokunyibilika, ngoko ke kuyimfuneko ukukhetha inkqubo yokutofa enoluhlu olukhulu lokulawula ubushushu kunye nokuzifudumeza kancinci ngexesha leplastiki, kwaye ubunzima bokwenyani bemveliso abukwazi ukuba ngaphantsi kwe-2/3 ye ubunzima bayo.Ubungakanani benaliti yomatshini.Ngokusekwe kwezi mfuno, kwiminyaka yakutshanje, iRamada iphuhlise uthotho lweesistim ezincinci kunye neziphakathi zePET ezikhethekileyo zeplastiki.Amandla okubamba akhethiweyo mkhulu kune-6300t / m2.
3. Uyilo lokungunda kunye nesango
Ii-PET preforms zidla ngokuyilwa kukungunda kweembaleki ezishushu.Isikhuselo sokushisa phakathi kwesikhunta kunye nomatshini wokubumba we-injection ngokukhethekileyo ufakwe kwi-thickness ye-12 mm, kwaye isikhuselo sokushisa sinokumelana noxinzelelo oluphezulu.I-port exhaust port kufuneka yanele ukuphepha ukufudumala kwendawo okanye ukutshiza, kodwa ubunzulu be-exhaust port ngokuqhelekileyo abudluli kwi-0.03 mm, ngaphandle koko ukukhanya kulula.
4. Ubushushu obunyibilikayo
Umlinganiselo unokwenziwa ngendlela yejethi yomoya.Kwi-270-295 ° C, umgangatho wokuphucula i-GF-PET unokusetwa kwi-290-315 ° C.
5. Isantya sokutofa
Isantya sokutofa ngokubanzi sikhawuleza kakhulu, esithintela ukunyangwa kwangoko kwesitofu.Kodwa ngokukhawuleza okukhulu, izinga eliphezulu lokucheba lenza ukuba izinto zibe brittle.I-popup iya kugqitywa ngemizuzwana emi-4.
6, uxinzelelo lwasemva
Okuphantsi kungcono, ukuze ungagqoki.Ngokubanzi akukho ngaphezulu kwe-100bar.
Ixesha lokuposa: Feb-24-2022