Ubushushu ngaphakathiisitofu sokungundaayilingani kumanqaku ahlukeneyo, ekwanxulunyaniswa nenqanaba lexesha kumjikelo wokutofa.Umsebenzi womshini wokushisa we-mold kukugcina ukushisa rhoqo phakathi kwe-2min kunye ne-2max, oku kuthetha ukuthintela ukuhluka kweqondo lokushisa ukusuka ekuguquguqukeni kunye nokuhla ngexesha lenkqubo yokuvelisa okanye i-gap.Ezi ndlela zilandelayo zokulawula zifanelekile ukulawula ukushisa kwesikhunta: Ukulawula ukushisa kwamanzi kuyindlela esetyenziswa ngokuqhelekileyo, kwaye ukuchaneka kokulawula kunokuhlangabezana neemfuno zeemeko ezininzi.Ukusebenzisa le ndlela yokulawula, iqondo lokushisa eliboniswe kumlawuli alihambelani nokushisa kwe-mold;iqondo lobushushu lokungunda liguquguquka kakhulu, kuba izinto ezishushu ezichaphazela ukungunda azikhange zilinganiswe ngokuthe ngqo kwaye zihlawulelwe ezi zinto zibandakanya utshintsho kumjikelo wokutofa, isantya sokutofa, ubushushu obunyibilikayo kunye nobushushu beGumbi.Okwesibini lulawulo oluthe ngqo lobushushu bomngundo.Le ndlela kukufaka inzwa yeqondo lokushisa ngaphakathi kwesikhunta, esisetyenziswa kuphela xa ukuchaneka kokulawula ubushushu besikhunta kuphezulu.Iimpawu eziphambili zokulawulwa kweqondo lokushisa zibandakanya: ukushisa okubekwe ngumlawuli kuhambelana nokushisa kwe-mold;izinto ezishushu ezichaphazela isikhunta zinokulinganiswa ngokuthe ngqo kwaye zihlawule.Kwiimeko eziqhelekileyo, ukuzinza kweqondo lokushisa lokubumba kungcono kunokulawula ukushisa kwamanzi.Ukongeza, ulawulo lobushushu lokungunda lunokuphinda-phinda ngcono kulawulo lwenkqubo yokuvelisa.Okwesithathu lulawulo oludibeneyo.Ulawulo oludibeneyo luyinkqubo yezi ndlela zingentla, inokulawula ukushisa kwamanzi kunye nokubumba ngexesha elifanayo.Kulawulo oludibeneyo, indawo yenzwa yokushisa kwi-mold ibaluleke kakhulu.Xa ubeka inzwa yokushisa, imilo, isakhiwo, kunye nendawo yomjelo wokupholisa kufuneka kuthathelwe ingqalelo.Ukongeza, inzwa yobushushu kufuneka ibekwe kwindawo edlala indima eqinisekileyo kumgangatho wamalungu abunjiweyo enaliti.Zininzi iindlela zokudibanisa umatshini wobushushu omnye okanye ngaphezulu kwisilawuli somatshini wokubumba inaliti.Kungcono ukusebenzisa ujongano lwedijithali ngokwemigaqo yokusebenza, ukuthembeka kunye nokuchasana nokuphazamiseka.

Ibhalansi yobushushu yeisitofu sokungundailawula ukuqhuba kobushushu phakathi komatshini wokubumba inaliti kunye nokungunda ngundoqo kwimveliso yeendawo ezibunjiweyo zenaliti.Ngaphakathi kwesikhunta, ubushushu obuziswe yiplastiki (njenge-thermoplastic) idluliselwe kwizinto eziphathekayo kunye nentsimbi ye-mold ngokusebenzisa i-radiation ye-thermal, kwaye idluliselwe kumanzi okudlulisa ubushushu ngokusebenzisa i-convection.Ukongeza, ubushushu budluliselwa kwi-atmosfera kunye nesiseko sokungunda ngemitha ye-thermal.Ubushushu obufunxwa lulwelo lokudlulisa ubushushu buthathwa ngumatshini wobushushu bokungunda.Ibhalansi ye-thermal yokubumba ingachazwa njenge: P = Pm-Ps.Apho i-P bubushushu obuthathwe ngumatshini wobushushu bokungunda;I-Pm bubushushu obuveliswa yiplastiki;I-Ps bubushushu obukhutshwa ngumngundo emoyeni.Injongo yokulawula ubushushu bokubumba kunye nefuthe lobushushu bokubumba kwiindawo ezibunjiweyo zesitofu Kwinkqubo yokubumba isitofu, eyona njongo iphambili yokulawula ubushushu bomngundo kukufudumeza ukungunda kwiqondo lobushushu elisebenzayo, kunye nokugcina ubushushu bomngundo rhoqo kwiqondo lobushushu lokusebenza.Ukuba la manqaku mabini angentla aphumelele, ixesha lomjikelo linokuphuculwa ukuze kuqinisekiswe umgangatho ozinzileyo wezinto ezibunjiweyo zesitofu.Ubushushu bomngundo buyakuchaphazela umgangatho womphezulu, ubumanzi, ukushwabana, umjikelo wenaliti kunye noguquko.Ukushisa okugqithisileyo okanye okungonelanga kwesikhunta kuya kuba nemiphumo eyahlukileyo kwizinto ezahlukeneyo.Kwi-thermoplastics, ubushushu obuphezulu bokungunda buhlala buphucula umgangatho womphezulu kunye nolwelo, kodwa buya kwandisa ixesha lokupholisa kunye nomjikelo wenaliti.Iqondo lobushushu elisezantsi lokungunda liya kunciphisa ukushwabana kubumba, kodwa liya kwandisa ukucutheka kwenaliti ebunjiweyo inxalenye emva kokudilizwa.Kwiiplastiki ze-thermoset, ubushushu obuphezulu bokubumba buhlala bunciphisa ixesha lokujikeleza, kwaye ixesha lichongwa lixesha elifunekayo ukuze inxalenye iphole.Ukongeza, ekusetyenzweni kweeplastiki, ubushushu obuphezulu bokubumba buya kunciphisa ixesha leplastiki kunye nokunciphisa inani lemijikelo.