Kwinkqubo yokubumba yokuguqula amasuntswana eplastiki kwiimveliso zeplastiki, iiplastiki zihlala ziphantsi kobushushu obuphezulu kunye noxinzelelo oluphezulu, kunye nokubunjwa okuhambayo kumazinga aphezulu okucheba.Iimeko ezahlukeneyo zokubumba kunye neenkqubo ziya kuba nemiphumo eyahlukileyo kumgangatho wemveliso.Isitofu sokubumba sineplastiki Inemiba emine: imathiriyeli ekrwada, umatshini wokubumba inaliti, ukubumba kunye nenkqubo yokubumba inaliti.
Umgangatho weemveliso ubandakanya umgangatho wezinto zangaphakathi kunye nomgangatho wokubonakala.Umgangatho wezinto zangaphakathi ngamandla omatshini, kwaye ubukhulu boxinzelelo lwangaphakathi buchaphazela ngokuthe ngqo amandla omatshini wemveliso.Izizathu eziphambili zokuvelisa uxinzelelo lwangaphakathi zichongwa yi-crystallinity yemveliso kunye nokuqhelaniswa kwama-molecule kwi-plastiki yokubumba.ye.Umgangatho wembonakalo yemveliso ngumgangatho womphezulu wemveliso, kodwa ukulwa kunye nokuguqulwa kwemveliso okubangelwa uxinzelelo olukhulu lwangaphakathi kuya kuchaphazela umgangatho wokubonakala.Umgangatho wembonakalo yeemveliso zibandakanya: iimveliso ezingonelanga, izibonda zemveliso, amanqaku e-weld, i-flash, amaqamza, iingcingo zesilivere, amabala amnyama, i-deformation, iintanda, i-delamination, i-peeling kunye ne-discoloration, njl., zonke ezinxulumene nobushushu bokubumba, uxinzelelo, ukuhamba, ixesha. kunye nesikhundla.ezinxulumene.
Umxholo
Icandelo lokuqala: Ubushushu bokubumba
Icandelo lesibini: Uxinzelelo lwenkqubo yokubumba
Icandelo lesithathu: Isantya somatshini wokubumba isitofu
Icandelo leSine: Ukumisela ixesha
Icandelo lesihlanu: Ulawulo lweNdawo
Icandelo lokuqala: Ubushushu bokubumba
Ubushushu bomphanda:Bubushushu obunyibilikayo beplastiki.Ukuba iqondo lokushisa lombhobho libekwe phezulu kakhulu, i-viscosity yeplastiki emva kokunyibilika iphantsi.Ngaphantsi koxinzelelo lwenaliti efanayo kunye nesantya sokuhamba, isantya sokutofa siyakhawuleza, kwaye iimveliso ezibunjiweyo zithande ukudanyaza, isilivere, ukuguquka kombala kunye nokuqina.
Iqondo lobushushu lombhobho liphantsi kakhulu, iplastiki yenziwe kakuhle ngeplastiki, i-viscosity iphezulu, isantya sokutofa siyacotha phantsi koxinzelelo lwenaliti efanayo kunye nesantya sokuhamba, iimveliso ezibunjiweyo azanelanga ngokulula, amanqaku e-weld ayabonakala, imilinganiselo ilungile. engazinzanga kwaye kukho iibhloko ezibandayo kwiimveliso.
Ubushushu bombhobho:Ukuba ubushushu bombhobho bubekwe phezulu, umbhobho uya kuthontsiza ngokulula, kubangele imicu ebandayo kwimveliso.Ubushushu obuphantsi bombhobho bubangela ukuvaleka kwenkqubo yokugalela isikhunta.Uxinzelelo lwenaliti kufuneka lwandiswe ukutofa iplastiki, kodwa kuya kubakho imathiriyeli ebandayo kwimveliso ebunjiweyo kwangoko.
Iqondo lobushushu lokungunda:Ukuba iqondo lobushushu lokungunda liphezulu, uxinzelelo lwenaliti kunye nesantya sokuhamba sinokusetwa ngaphantsi.Nangona kunjalo, kuxinzelelo olufanayo kunye nesantya sokuhamba, imveliso iya kukhanya ngokulula, i-warp kunye ne-deform, kwaye kuya kuba nzima ukukhupha umkhiqizo kwi-mold.Iqondo lokushisa lokubunjwa liphantsi, kwaye phantsi koxinzelelo lwe-injection efanayo kunye nesantya sokuhamba, imveliso yenziwe ngokungafanelekanga, kunye namaqamu kunye namanqaku e-weld, njl.
Iqondo lobushushu lokumisa ngeplastiki:Iiplastiki ezahlukeneyo zinamaqondo obushushu omileyo ahlukeneyo.Iiplastiki ze-ABS ngokubanzi zibeka iqondo lobushushu lokumisa le-80 ukuya kwi-90 ° C, ngaphandle koko kuya kuba nzima ukomisa kunye nokukhupha ukufuma kunye nezinyibilikisi eziseleyo, kwaye iimveliso ziya kuba lula ukuba neengcingo zesilivere kunye namaqamza, kwaye amandla emveliso nawo aya kuncipha.
Icandelo lesibini: Uxinzelelo lwenkqubo yokubumba
Uxinzelelo lwangaphambili lokubumba:uxinzelelo oluphezulu lwasemva kunye nobuninzi bokugcina obuphezulu kuthetha ukuba izinto ezininzi zinokugcinwa ngaphakathi komthamo ofanayo wokugcina.Ukunyanzeliswa kwengcinezelo ephantsi kuthetha ukuxinwa kokugcinwa okuphantsi kunye nezinto ezincinci zokugcina.Emva kokumisela indawo yokugcina, kwaye emva koko wenze uhlengahlengiso olukhulu kuxinzelelo lwangasemva, kufuneka ubeke ingqalelo ukusetha kwakhona indawo yokugcina, ngaphandle koko kuya kubangela ngokulula i-flash okanye imveliso enganeleyo.
Uxinzelelo lokutofa:Iindidi ezahlukeneyo zeplastiki zinee-viscosities zokunyibilika ezahlukeneyo.I-viscosity yeeplastiki ze-amorphous zitshintsha kakhulu ngotshintsho kwiqondo lokushisa leplastiki.Uxinzelelo lwenaliti lubekwe ngokwe-welding viscosity yeplastiki kunye nomlinganiselo wenkqubo yeplastiki.Ukuba uxinzelelo lwenaliti lubekwe phantsi kakhulu, imveliso iya kujovwa ngokungafanelekanga, okukhokelela kwizibonda, amanqaku e-weld kunye nemilinganiselo engazinzanga.Ukuba uxinzelelo lwenaliti luphezulu kakhulu, imveliso iya kuba ne-flash, i-discoloration kunye nobunzima bokukhupha i-mold.
Uxinzelelo lokubamba:Kuxhomekeke kwindawo eqikelelweyo ye-mold cavity kunye noxinzelelo lwenaliti.Ukuba uxinzelelo lwe-clamping alunelanga, imveliso iya kukhanya ngokulula kwaye inyuse ubunzima.Ukuba i-clamping force inkulu kakhulu, kuya kuba nzima ukuvula i-mold.Ngokuqhelekileyo, ukusetwa koxinzelelo lwe-clamping akufuneki kudlule i-120par/cm2.
Ukubamba uxinzelelo:Xa inaliti igqityiwe, isikrufu siyaqhubeka sinikwa uxinzelelo olubizwa ngokuba luxinzelelo lokubamba.Ngeli xesha, imveliso kwi-mold cavity ayikakakhenkcezi.Ukugcina uxinzelelo kunokuqhubeka nokuzalisa i-mold cavity ukuqinisekisa ukuba imveliso igcwele.Ukuba uxinzelelo lokubamba kunye nokumisela uxinzelelo kuphezulu kakhulu, kuya kuzisa ukuchasana okukhulu kwi-mold yokuxhasa kunye ne-core pull-out.Imveliso iya kuba mhlophe ngokulula kwaye i-warp.Ukongezelela, isango lomqhubi we-mold liya kwandiswa ngokulula kwaye liqiniswe ngeplastiki eyongezelelweyo, kwaye isango liya kuphulwa kumgijimi.Ukuba uxinzelelo luphantsi kakhulu, imveliso iya kuba nezibonda kunye nemilinganiselo engazinzanga.
Umgaqo-siseko wokumisela i-ejector kunye noxinzelelo lwe-neutron kukubeka uxinzelelo olusekelwe kubukhulu obupheleleyo bendawo ye-mold cavity, indawo ephambili yokubonisa i-core efakiweyo, kunye nobunzima bejometri yemveliso ebunjiweyo.ubukhulu.Ngokubanzi, oku kufuna ukuseta uxinzelelo lokungunda oluxhasayo kunye ne-neutron cylinder ukuze ikwazi ukutyhala imveliso.
Icandelo lesithathu: Isantya somatshini wokubumba isitofu
Isantya sokukrazula: Ukongezelela ekulungiseni izinga lokuhamba kweplastiki yangaphambili, ichaphazeleka kakhulu yingcinezelo yangaphambili yeplastiki.Ukuba isantya sokubunjwa kwangaphambili sihlengahlengiswa kwixabiso elikhulu kwaye uxinzelelo lwangaphambili lokubumba luphezulu, njengoko i-screw ijikeleza, iplastiki iya kuba namandla amakhulu okucheba emgqonyeni, kwaye isakhiwo seplastiki semolekyuli siya kunqunyulwa ngokulula. .Imveliso iya kuba namabala amnyama kunye nemivimbo emnyama, eya kuchaphazela umgangatho wokubonakala kunye namandla emveliso., kwaye ubushushu bombhobho wokufudumeza kunzima ukulawula.Ukuba i-pre-plastic flow rate ibekwe phantsi kakhulu, ixesha lokugcinwa kweplastiki kwangaphambili liya kwandiswa, eliya kuchaphazela umjikelezo wokubumba.
Isantya sokutofa:Isantya sokutofa kufuneka simiselwe ngokufanelekileyo, kungenjalo siya kuchaphazela umgangatho wemveliso.Ukuba isantya sokutofa sikhawuleza kakhulu, imveliso iya kuba namaqamza, itshiswe, iguqulwe umbala, njalo njalo.
Inkxaso yokungunda kunye nesantya sokuhamba kwe-neutron:akufunekanga ibekwe phezulu kakhulu, kungenjalo i-ejection kunye neentshukumo zokutsalwa okungundoqo ziya kukhawuleza kakhulu, okukhokelela kwi-ejection engazinzanga kunye nokutsalwa okungundoqo, kwaye imveliso iya kuba mhlophe ngokulula.
Icandelo leSine: Ukumisela ixesha
Ixesha lokumisa:Lixesha lokumisa izinto zeplastiki ekrwada.Iindidi ezahlukeneyo zeplastiki zinamaqondo obushushu afanelekileyo omileyo kunye namaxesha.Ubushushu bokomisa beplastiki ye-ABS yi-80 ~ 90 ℃ kwaye ixesha lokumisa ziiyure ezi-2.Iplastiki ye-ABS ifunxa ngokubanzi i-0.2 ukuya kwi-0.4% yamanzi kwiiyure ezingama-24, kwaye umthamo wamanzi onokutofwa yi-0.1 ukuya kwi-0.2%.
Isitofu kunye nexesha lokubamba uxinzelelo:Indlela yokulawula umatshini wokutofa wekhompyuter ixhotyiswe ngenaliti yamanqanaba amaninzi ukulungelelanisa uxinzelelo, isantya kunye nesixa seplastiki yokutofa ngezigaba.Isantya seplastiki esifakwe kwi-mold cavity sifikelela kwisantya esiqhubekayo, kwaye ukubonakala kunye nomgangatho wezinto zangaphakathi zeemveliso ezibunjiweyo ziphuculwe.
Ke ngoko, inkqubo yokutofa ngokuqhelekileyo isebenzisa ulawulo lwendawo endaweni yolawulo lwexesha.Uxinzelelo lokubamba lulawulwa lixesha.Ukuba ixesha lokubamba lide, ubuninzi bemveliso buphezulu, ubunzima bunzima, uxinzelelo lwangaphakathi lukhulu, ukukhwabanisa kunzima, kulula ukwenza mhlophe, kwaye umjikelezo wokubumba uyandiswa.Ukuba ixesha lokubamba lifutshane kakhulu, imveliso iya kuba yinto ehambelana nezibonda kunye nemilinganiselo engazinzanga.
Ixesha lokupholisa:Kukuqinisekisa ukuba imveliso izinzile kwimilo.Ifuna ukupholisa okwaneleyo kunye nexesha lokubumba emva kokuba iplastiki efakwe kwi-mold cavity ibunjwe kwimveliso.Ngaphandle koko, imveliso kulula ukuyijika kunye nokukhubazeka xa i-mold ivuliwe, kwaye i-ejection ilula ukuguqula kwaye ibe mhlophe.Ixesha lokupholisa lide kakhulu, elongeza umjikelo wokubumba kwaye lingenamali.
Icandelo lesihlanu: Ulawulo lweNdawo
Indawo yokutshintsha umngundo ngumgama oshukumayo wonke ukusuka ekuvulekeni kokungunda ukuya ekuvaleni nasekutshixeni, okubizwa ngokuba yindawo yokutshintsha ukungunda.Eyona ndawo ilungileyo yokuhambisa isikhunta kukukwazi ukukhupha imveliso kakuhle.Ukuba umgama wokuvula umngundo mkhulu kakhulu, umjikelo wokubumba uya kuba mde.
Ngethuba nje isikhundla sokuxhaswa kwesikhunta silawulwa, indawo yokukhupha kwi-mold inokususwa ngokulula kwaye imveliso inokususwa.
Indawo yokugcina:Okokuqala, isixa seplastiki esifakwe kwimveliso ebunjiweyo kufuneka siqinisekiswe, kwaye okwesibini, ubungakanani bezinto ezigcinwe kwi-barrel kufuneka zilawulwe.Ukuba indawo yokugcina ilawulwa ngaphezu kokudubula kwesinye, imveliso iya kukhanya ngokulula, ngaphandle koko imveliso iya kwenziwa ngokungonelanga.
Ukuba kukho izinto ezininzi kwi-barrel, iplastiki iya kuhlala kwi-barrel ixesha elide, kwaye umkhiqizo uya kuphelelwa lula kwaye uchaphazele amandla emveliso ebunjiweyo.Ngokuchasene noko, kuchaphazela umgangatho weplastiki yeplastiki, kwaye akukho nto iphinda ifakwe kwi-mold ngexesha lokugcinwa koxinzelelo, okubangela ukubunjwa okunganeleyo kwemveliso kunye nezibonda.
Ukuqukumbela
Umgangatho weemveliso ezibunjiweyo zesitofu zibandakanya uyilo lwemveliso, izinto zeplastiki, uyilo lokubumba kunye nomgangatho wokusetyenzwa, ukukhethwa komatshini wokubumba kunye nohlengahlengiso lwenkqubo, njl njl. .Uqwalaselo olubanzi nolubanzi lwemiba, ulungelelwaniso lunokwenziwa nganye nganye ukusuka kwiinkalo ezininzi okanye imiba emininzi inokulungiswa kanye.Nangona kunjalo, indlela yokulungelelanisa kunye nomgaqo uxhomekeke kumgangatho kunye neemeko zenkqubo yeemveliso eziveliswe ngelo xesha.
Ixesha lokuposa: Nov-15-2023