Ukugqabhuka kokunyibilika kubangela ukutshisa
Xa i-melt ifakwe kwi-cavity kunye nomthamo omkhulu phantsi kwesantya esiphezulu kunye noxinzelelo oluphezulu, kulula ukuvelisa ukunyibilika kokuqhaqha. Ngeli xesha, umphezulu onyibilikayo ubonakala uqhekeko olunqamlezileyo, kwaye indawo yokuqhekeka ixubene kakhulu kumphezulu weendawo zeplastiki ukwenza iindawo zokuncamathisela. Ngokukodwa xa ixabiso elincinci lezinto ezityhidiweyo zifakwe ngokuthe ngqo kwi-cavity ekulula ukuba ibe nkulu kakhulu, ukugqabhuka kwenyibilika kubi kakhulu kwaye indawo yokunamathisela inkulu.
Undoqo wokuqhekeka okunyibilikayo kubangelwa kukuziphatha kwe-elastic ye-polymer melt material, xa ukuhamba kolwelo kwi-cylinder, kufuphi ne-cylinder yolwelo ngodonga oluxutywe nodonga, uxinzelelo lukhulu, ukuhamba kwesantya sezinto ezityhidiweyo kuncinci, kanye izinto ezityhidiweyo eziphuma kumbhobho wokuphuma, uxinzelelo kwisiphumo sodonga lwento enyamaleleyo, kunye nesilinda esisembindini sesantya sokuqukuqela kolwelo siphezulu kakhulu, siyathelekiswa. Kwimathiriyeli etyhidiweyo liziko lezinto ezityhidiweyo ezithwala kunye nokukhawulezisa, Ekubeni ukuhamba kwezinto ezityhidiweyo kuqhubekayo, isantya sokuhamba kwempahla etyhidiweyo yangaphakathi nangaphandle iya kulungelelaniswa kwakhona kwisantya esiphakathi.
Kule nkqubo, izinto ezityhidiweyo ziya kuba noshintsho olubukhali loxinzelelo luya kuvelisa ubunzima, ngenxa yokuba isantya se-injection sikhawuleza kakhulu, uxinzelelo lukhulu kakhulu, lukhulu kakhulu kunobunzima bezinto ezinyibilikisiweyo, okubangelwa ukuqhaqha.
Ukuba izinto ezinyibilikisiweyo kumjelo flow kwimeko yokutshintsha ngesiquphe imilo, ezifana ukushwabana ububanzi, ukwandisa kwaye efile Angle, njl, izinto ezinyibilikisiweyo zihlale kwikona kunye nokujikeleza, yahlukile kumandla eqhelekileyo yokunyibilika, ukucheba deformation. inkulu, xa ixutywe ukuhamba kwayo okuqhelekileyo kwezinto eziphumayo, ngenxa yokubuyiselwa kokuguqulwa okungahambelaniyo, ayikwazi ukuvala, ukuba ukungafani kukhulu kakhulu, ukuphuka kwe-fracture kwenzeka, Kuthatha kwakhona uhlobo lokuqhawula ukunyibilika.
Ukulawulwa ngokungafanelekanga kweemeko zokubumba kukhokelela ekutshiseni
Oku kukwangunobangela obalulekileyo wokutshisa kunye nokuncamathisela kumphezulu wamalungu eplastiki, ngakumbi ubungakanani besantya sokutofa sinempembelelo enkulu kuyo. Xa i-flow material ifakwe kancinci kwi-cavity, ukuhamba kwemeko yezinto ezinyibilikisiweyo kukuhamba kwe-laminar. Xa isantya sokutofa sinyukela kwixabiso elithile, imeko yokuqukuqela isuka iphazamiseke.
Ngokubanzi, umphezulu wamacandelo eplastiki eyenziwe yi-laminar flow igqamile kwaye igudileyo, kwaye iinxalenye zeplastiki ezenziwe phantsi kweemeko eziphazamisayo azikwazi nje ukuncamathela amabala angaphezulu, kodwa kulula nokuvelisa iipores ngaphakathi kweendawo zeplastiki.
Ngoko ke, isantya sokujova akufanele sibe phezulu kakhulu, izinto zokuhamba kufuneka zilawulwe kwi-laminar flow flow state of mold filling.
Ukuba ubushushu bezinto ezityhidiweyo ziphezulu kakhulu, kulula ukubangela ukubola kwezinto ezityhidiweyo kunye ne-coking, okukhokelela kwiindawo zokunamathisela phezu kwendawo yeplastiki.
I-injection jikelele yokubumba umatshini wokujikeleza kufuneka ibe ngaphantsi kwe-90r / min, uxinzelelo lwangasemva lungaphantsi kwe-2MPa, enokuthintela ubushushu obugqithisileyo obuveliswa yi-cylinder.
Ukuba inkqubo yokubumba ngenxa ye-screw umva xa ixesha lokujikeleza lide kakhulu kunye nobushushu obugqithisileyo, inokunyuswa ngokufanelekileyo isantya se-screw, ukwandisa umjikelo wokubumba, ukunciphisa uxinzelelo lwangasemva lwe-screw, ukuphucula ubushushu bokutya kwesilinda kunye nokusetyenziswa kwe-screw. ukuthanjiswa kakubi kwemathiriyeli ekrwada kunye nezinye iindlela zokoyisa.
Kwinkqubo yokutofa, ukubuya umva okuninzi kakhulu kwemathiriyeli etyhidiweyo ecaleni kwesikrufu segroove kunye nokugcinwa kwentlaka kwiringi yokumisa kuya kukhokelela ekuthotyweni kwepolima yemathiriyeli enyibilikisiweyo. Kule meko, i-resin ene-viscosity ephezulu kufuneka ikhethwe, uxinzelelo lwenaliti kufuneka luncitshiswe ngokufanelekileyo, kwaye umatshini wokubumba wenaliti kunye nobukhulu obukhulu kufuneka utshintshwe. Isitofu ukubumba umatshini ngokuqhelekileyo esetyenziswa ukumisa umsesane kulula ukuba kubangele ukugcinwa, ukuze ukubola kokutshintsha kombala, xa i-dicoloration yezinto ezinyibilikisiweyo zitofelwe emngxunyeni, oko kukuthi, ukubunjwa kogxininiso omdaka okanye omnyama. Kulo mba, i-nozzle centered screw system kufuneka icocwe rhoqo.
Ukutshisa okubangelwa kukusilela kokungunda
Ukuba i-exhaust hole ye-mold ivaliwe yi-arhente yokukhulula kunye nezinto eziqiniweyo ezikhutshwe kwizinto eziluhlaza, umngxuma wokukhupha we-mold awumiselwanga ngokwaneleyo okanye indawo ayichanekanga, kunye nesantya sokuzalisa ngokukhawuleza, Umoya ekubunjeni kade kakhulu ukuba ukhuphe i-adiabatic kwaye icinezelwe ukuvelisa igesi ephezulu yobushushu, kwaye i-resin iya kubola kwaye icoke. Kule nkalo, izinto ezithintelayo kufuneka zisuswe, amandla okubamba kufuneka ancitshiswe, kwaye ukukhutshwa kakubi kwesikhunta kufuneka kuphuculwe.
Kukwabaluleke kakhulu ukumisela uhlobo kunye nendawo yesango lokufa. Isimo sokuhamba kwezinto ezityhidiweyo kunye nokusebenza kokuphela kokufa kufuneka kuqwalaselwe ngokupheleleyo kuyilo. Ukongezelela, inani le-arhente yokukhulula akufanele libe lininzi, kwaye umphezulu wesigxina kufuneka ugcine ukugqiba okuphezulu.
Ixesha lokuthumela: 19-10-21