Kukho iindlela ezahlukeneyo zokubumba inkqubo ye-TPU:isitofu sokubumba, ukubumba ukuvuthela, ukunyanzeliswa kwe-compression, i-extrusion molding, njl., phakathi kwe-injection ye-injection ixhaphake kakhulu.
Umsebenzi wokubumba i-injection kukucwangcisa i-TPU kwiindawo ezifunekayo, eziye zahlulahlulwe zibe yinkqubo engapheliyo yokubumba kwangaphambili, i-injection kunye ne-ejection kwizigaba ezintathu.
Kukho iindidi ezimbini zoomatshini bokubumba, uhlobo lwe-plunger kunye nohlobo lwe-screw, kunye nomatshini wokubumba we-screw wohlobo lwe-screw uyacetyiswa kuba unamandla okubonelela ngesantya esifanayo, iplastiki kunye nokunyibilika.
TPU Material Molding Conditions
Ezona meko zibalulekileyo zokubumba i-TPU linqanaba lobushushu, uxinzelelo kunye nexesha eliphembelela ukujikeleza kweplastiki kunye nokupholisa.Ezi ndlela ziya kuba nefuthe kwimbonakalo kunye nokusebenza kakuhle kwecandelo leTPU.Ukuba usebenzisa iimeko zokuphatha ezigqwesileyo, isiphumo kufuneka sibe nemveliso engaguqukiyo emhlophe ukuya kumalungu e-beige.
Ubushushu
Amanqanaba obushushu afuna ukulawulwa kwinkqubo yokubumba i-TPU yinqanaba lobushushu lomphanda, inqanaba lobushushu bombhobho kunye nobushushu bokubumba.Amaqondo obushushu amabini okuqala ngokubanzi achaphazela iplastiki kunye nokuhamba kwe-TPU, kwaye ubushushu bokugqibela buchaphazela ukupholisa kwe-TPU.
a.Iqondo lobushushu lomphanda
Inketho yeqondo lokushisa lomgqomo ihambelana nokuqina kwe-TPU.Iqondo lobushushu elinyibilikayo le-TPU elinokuqina okuphezulu liphezulu, ngoko ke ukuphela kobushushu bomatshini kufuna phezulu ngakumbi.Uluhlu lobushushu lomgqomo wokuphathwa kwe-TPU yi-177 ~ 232 ℃.
Ukujikeleziswa kweqondo lobushushu lomphanda ngokuqhelekileyo ukusuka kwicala le-hopper ukuya kwi-nozzle, ngokuthe ngcembe kwandisa, ukuze iqondo lobushushu le-TPU linyuke ngokuthe ngcembe ukufezekisa injongo yeplastiki engaguqukiyo.
b.Ubushushu beNozzle
Ihlala ingaphantsi kancinci kunelona nqanaba lobushushu lomphanda ukuthintela ukunyibilika kwe-TPU kwi-nozzle kwindlela ethe ngqo.
Ukuba umlomo wokuzitshixa usetyenziselwa ukukhupha izinkcwe, iqondo lobushushu lombhobho linokulawulwa kwelona qondo liphezulu lobushushu lomphanda.
c.Ubushushu bomngundo
Ubushushu bokubumba bunempembelelo enkulu kwiipropati zangaphakathi kunye nomgangatho weemveliso ze-TPU.Iimpembelelo zayo ezichaphazelayo zichongwa zizinto ezininzi ezifana ne-crystallinity ye-TPU kunye nobukhulu bemveliso.
Ubushushu bomngundo buqhele ukulawulwa sisixhobo sokupholisa somgangatho wobushushu obungaguqukiyo njengamanzi, kwaye inqanaba lobushushu lokungunda kunye nokungunda lifuna ukuphakama ngakumbi kwi-TPU enobulukhuni obuphezulu kunye nekristale ephezulu.Izinto TPU ubushushu ngundo ngokubanzi kwi 10 ~ 60 ℃.
Ukuba iqondo lokushisa lokungunda kunye ne-mildew liyancitshiswa, oko kuya kubangela i-post-shrinkage yemveliso kunye noshintsho ekusebenzeni kakuhle.
Uxinzelelo
Inkqubo yokutofa uxinzelelo lubandakanya uxinzelelo lweplastiki (uxinzelelo lwangasemva) kunye noxinzelelo lwenaliti.
Inkqubo yokudubula i-stress ibandakanya uxinzelelo lweplastiki (uxinzelelo lwangasemva) kunye noxinzelelo lokudubula.
Ukuphucula uxinzelelo lwangasemva kuya kuphakamisa ubushushu obunyibilikayo, ukwehlisa isantya seplastiki, wenze umgangatho wobushushu obunyibilikayo ufane, udibanise izinto zomthunzi ngokufanayo, kwaye ukhuphe irhasi yokunyibilikisa, kodwa ngokuqinisekileyo uya kwandisa umjikelo wokubumba.Uxinzelelo lwangasemva lwe-TPU luhlala kwi-0.3 ukuya kwi-4 MPa.
Uxinzelelo lwe-Shot luxinzelelo olunxulumene ne-TPU ngomphezulu we-screw, kwaye umsebenzi wayo kukufumana ukuchasana nokuhamba kwe-TPU ukusuka kwi-barrel ukuya kwi-cavity, ukubonelela ngesantya sokulayisha ukunyibilika, kunye nokuncinci ukunyibilika.
Ukuchasana nokuhamba kwe-TPU kunye nesantya sokuzaliswa kokungunda kunye nokungunda kusondele kakhulu kwi-viscosity yokunyibilika, kwaye i-viscosity yokunyibilika ihambelana ngokuthe tye nokuqina kwe-TPU kunye nobushushu obunyibilikayo, oko kukuthi, i-viscosity enyibilikayo ayibonwa kuphela ngamaqondo obushushu kunye noxinzelelo, ikwasekwa ngukuqina kweTPU. .
Uxinzelelo lokudubula lwe-TPU luqhelekile ukuba yi-20 ~ 110MPa.Uxinzelelo lokubamba lunesiqingatha soxinzelelo lwe-injection, kwaye uxinzelelo lwangemva lufuna ukudweliswa ngaphantsi kwe-1.4 MPa ukwenza i-TPU iplastiki ngokulinganayo.
Ixesha
Ixesha elifunekayo ukugqiba inkqubo yokudutyulwa libizwa ngokuba ngumjikelo wokubumba inaliti.
Umjikelezo wokubumba uquka ixesha lokuzalisa i-mold kunye ne-mildew, ixesha lokubamba, ixesha lokupholisa kunye nezinye ixesha ezahlukeneyo (ukuvulwa kwesikhunta kunye ne-mildew, ukuqaliswa kwe-mold, ukuvala i-mold, njalo njalo), echaphazela ngokuthe ngqo ukusebenza kakuhle komsebenzi kunye nesicelo sezixhobo.
Umjikelo wokubumba inaliti ye-TPU idla ngokumiselwa kukuqina, ubukhulu benxalenye kunye neemfuno zemveliso, umjikelo wokubumba we-TPU ngokufanayo uqhagamshelwe kwinqanaba lobushushu lokungunda.
Ireyithi yokutofa
Ireyithi yokudutyulwa ngokubanzi igqitywe ngokucwangciswa kwezinto ezakhiwe ngesitofu seTPU.Iimveliso ezinobuso obushinyeneyo zifuna isantya sokudubula esisezantsi, ngelixa isiphelo esibhityileyo sifuna isantya sokutofa ngokukhawuleza.
Emva konyango lweemveliso ezibunjiweyo zesitofu seTPU
I-TPU ngenxa yokungalingani kweplastiki emgqonyeni okanye amaxabiso ahlukeneyo okupholisa kumgodi wokungunda, ihlala ivelisa ukwakheka okungaqhelekanga, ulungelelwaniso kunye nokucutheka, okubangela ubukho bokungavisisani kwangaphakathi kwinto leyo, ebaluleke kakhulu kwiimveliso ezinodonga olungqingqwa okanye iimveliso ezinentonga. ukufakwa kwesinyithi.
Ukugcina kunye nokusetyenziswa, izinto ezinoxinzelelo lwangaphakathi kunye nexhala zihlala zinengxaki yokutshatyalaliswa kwepropathi ngoomatshini, ukwenza isilivere kumphezulu kunye nokuguqulwa kunye nokwahlula.
Inkonzo kwezi ngxaki kwimveliso kukuqinisa izinto.Iqondo lobushushu elinyibilikayo lixhomekeke ekuqineni kwe-TPU yeemveliso ezenziweyo, ukuqina okuphezulu kweqondo lobushushu lemveliso yokuqhotsa liphezulu, iqondo lobushushu elisezantsi liyancipha ngokunjalo;Iqondo lobushushu elibiza kakhulu linokwenza ukuba imveliso ijike okanye ijike, kwaye ibephantsi ukufikelela injongo yokuphelisa uxinzelelo kunye noxinzelelo lwangaphakathi.
I-TPU annealing kufuneka isetyenziswe ixesha elide kwinqanaba eliphantsi lobushushu, izinto ezinokuqina okuncitshisiweyo zinokubekwa kwindawo yobushushu kangangeeveki ezininzi ukufezekisa eyona ntsebenzo isebenzayo.
I-Anealing inokwenziwa kwisitovu somoya oshushu, qaphela ukubekwa kwendawo yokubeka kungekhona ebumelwaneni ukufumana kushushu kakhulu kunye nokuguqulwa kwemveliso.I-Anealing ayinakushenxisa kuphela uxinzelelo lwangaphakathi, kodwa ikwanyusa amakhaya oomatshini.
TPU imathiriyeli yokufakela inaliti yokubumba
Ukuhlangabezana neemfuno zokumisela kunye nokusetyenziswa kokuqina, amacandelo e-TPU afakwe kunye nokufakwa kwentsimbi.Ukufakwa kwesinyithi kuqala kubekwe kwindawo esisigxina kwi-injection mold kunye ne-mildew kwaye emva kokuba ifakwe kwimveliso yonke.
Iimveliso zeTPUkunye nokufakwa azibambeleli ngokukhuselekileyo kwi-TPU ngenxa yokwahlula kwizakhiwo ezishushu kunye nezinga lokucutha phakathi kokufakwa kwentsimbi kunye ne-TPU.Inketho yokutshiza le ngxaki kukutshisa i-preheating yentsimbi, ngenxa yokuba emva kokutshisa ukufakwa kunciphisa ubushushu. Umahluko wenqanaba lokunyibilika, ukwenzela ukuba inyibiliki ejikeleze into efakiweyo ikwazi ukupholiswa ngokuthe ngcembe ngexesha lokudubula, ukufinyela kufana kakhulu, kwaye ubungakanani obuthile bokucutheka kwezinto ezishushu kwenzekayo ukumisa uxinzelelo oluninzi lwangaphakathi malunga nokufakwa.
Ukubunjwa kwe-TPU ye-inlay kulula ukufumana ibhondi eqinile, ukufakwa kunokufakwa nge-adhesive, emva kokuba ishushu kwi-120 ° C kwaye emva koko itofwe.Ukongeza, kufuneka igcinwe engqondweni ukuba i-TPU esetyenzisiweyo akufuneki iqulathe i-lubricant.
Ukusetyenziswa kwakhona kwemathiriyeli yokurisayikilisha yeTPU
Kwinkqubo yokusetyenzwa kwe-TPU, izinto ezilahlwayo ezifana nejelo lomjelo oyintloko, ishaneli eninzi kunye neemveliso ezingafanelekanga zinokuphinda zisetyenziswe kwaye zisetyenziswe kwakhona.
Ukusuka kwiziphumo eziqikelelwayo, imveliso ehlaziyiweyo i-100 yeepesenti ayidityaniswanga nezinto ezintsha, ukuba iipropathi zomatshini zokuhla azikho mbi kakhulu, zingasetyenziswa ngokupheleleyo, kodwa ukugcina iipropathi zomzimba kunye noomatshini kunye neemeko zenaliti kwinqanaba eliphezulu, Umlinganiselo ocetyiswayo wezinto ezihlaziyiweyo kwi-25% ukuya kwi-30% ulungile.
Kufuneka kuqatshelwe ukuba izinto ezisetyenzisiweyo kunye nezinto ezintsha zeentlobo ezifanayo neenkcukacha, ziye zangcoliswa okanye ziye zahlanjululwa ukuze kuthintelwe ukusetyenziswa kwezinto ezisetyenzisiweyo, izinto ezisetyenzisiweyo akufanele zigcinwe ixesha elide kakhulu, ezona zingcono ngokukhawuleza zihlanjululwe, ukusetyenziswa okomileyo. .I-viscosity enyibilikayo yezinto ezihlaziyiweyo kufuneka zincitshiswe ngokubanzi, kwaye iimeko zokubumba kufuneka zilungiswe.
Isishwankathelo
Eli nqaku lihlalutya iimpawu zezixhobo ze-TPU, iimeko zokubumba, kunye neendlela zokubumba, eziya kunceda ngethemba iprojekthi yakho yezinto ze-TPU.
Inqaku likhankanya iTPUukugqithisakunye ne-TPU ifake iinkqubo zokubumba, ezifuna amava aphezulu abaxhasi be-injection mold kunye nabanikezeli bemveliso yokubumba.
Ukuba uneprojekthi ebandakanya ezi nkqubo zimbini, kuyacetyiswa ukuba uqinisekise ukuba umzi-mveliso we-injection mold kunye ne-injection yokubumba imveliso yemveliso unamava ekwenzeni iimveliso ezifanayo ukuqinisekisa ukuphunyezwa ngokufanelekileyo kweprojekthi.
UKUBA ufuna naluphi na uncedo ncedaQhagamshelana nathi!
Ixesha lokuposa: Apr-23-2024