Phakathiukubunjwa kwegobolondo, ngaphambi kokwenza isikhunta kanye nomgogodla, isihlabathi esiboshwe simbozwe ngefilimu eqinile ye-resin ebusweni bezinhlayiya zesihlabathi. Isihlabathi esimboziwe sibizwa nangokuthi igobolondo (core) sand. Iwukuhlanganisa ngomshini isihlahla se-phenolic se-thermosetting esiyimpuphu nesihlabathi esingavuthiwe futhi siqiniswe ukuze sibe lukhuni futhi sibe namandla uma sishiswa. Seyenziwe yaba isihlabathi esimboziwe kusetshenziswa i-thermoplastic phenolic resin plus latent healing agent (efana ne-urotropine) kanye ne-lubricant (njenge-calcium stearate) ngenqubo ethile yokumboza. Lapho isihlabathi esimboziwe sifudumala, inhlaka embozwe phezu kwezinhlayiya zesihlabathi iyancibilika. I-resin encibilikisiwe ishintsha ngokushesha isuka esakhiweni esiwumugqa iye esakhiweni somzimba esingenakunyakaziswa ukuze isihlabathi esimboziwe siqine futhi sakheke. Ngaphezu kohlobo olujwayelekile lwe-granular eyomile yesihlabathi esimboziwe, kukhona nesihlabathi esimanzi futhi esinama-viscous.
Isihlabathi esimbozwe nge-resinizingxenye zokuphonsa igobolondoinezici ezilandelayo:
1) Inokusebenza okufanelekile kwamandla. Ingakwazi ukuhlangabezana nezidingo zesihlabathi esiwumgogodla wegobolondo eliphezulu, isihlabathi sebhokisi elishisayo esinamandla amaphakathi, nesihlabathi esinengxubevange engeyona insimbi enamandla aphansi.
I-2) I-fluidity enhle kakhulu, ukubumba okuhle komgogodla wesihlabathi kanye nohlaka olucacile, olungakhiqiza ama-sand cores ayinkimbinkimbi kakhulu, njengama-sand cores ebhantshi lamanzi njengamakhanda e-cylinder kanye nemizimba yomshini.
3) Izinga eliphezulu le-sand core lihle, lihlangene futhi alikhululekile. Ngisho noma kusetshenziswa ukumbozwa okuncane noma kungasebenzi, ikhwalithi engcono yangaphezulu ye-castings ingatholakala. Ukunemba kwe-dimensional kokulingisa kungafinyelela ku-CT7-CT8, futhi ubulukhuni be-Ra bungafinyelela ku-6.3-12.5μm.
I-4) Ukugoqeka okuhle, okulungele ukuhlanza nokuthuthukisa ukusebenza komkhiqizo
I-5) Umgogodla wesihlabathi akulula ukumunca umswakama, futhi amandla okugcina isikhathi eside akulula ukunciphisa, okulungele ukugcina, ukuthutha nokusetshenziswa.
Izinqubo zokukhiqiza zesikhunta sesihlabathi esimboziwe (umgogodla) sokwenza ukubunjwa kwegobolondo:
1. Inqubo eyisisekelo yokukhiqiza isikhunta sesihlabathi esinamekwe (umgogodla) yilena: flip noma vunguza isihlabathi→uqweqwe →ukuphuma kwesihlabathi→ukuqiniswa→umgogodla (isikhunta) nokunye.
1) Phenduka noma uvuthulule isihlabathi. Okusho ukuthi, isihlabathi esiboshwe sithululelwa esikhunjeni segobolondo noma siqhunyiswe ebhokisini eliyinhloko ukuze kukhiqizwe igobolondo noma umgogodla wegobolondo.
2) Ukuthunjwa. Ubukhulu bengqimba yegobolondo kulawulwa ngokulungisa izinga lokushisa lokushisa kanye nesikhathi sokubamba.
3) Ukukhishwa kwesihlabathi. Tshekisa isikhunta nebhokisi eliwumgogodla ukuze wenze isihlabathi esingaphenduliwe siwele endaweni yegobolondo elishisayo, bese usiqoqa ukuze siphinde sisetshenziswe. Ukuze kube lula ukususa isihlabathi esihlanganisiwe esingancibilikisiwe, uma kunesidingo, indlela yomshini wokuthuthumela emuva naphambili ingamukelwa.
4) Ukuqina. Esimweni sokushisa, ukuze wenze ukushuba kwegobolondo kube okufanayo, kwenze ukuthintana nobuso begobolondo elishisayo phakathi nesikhathi esithile ukuze uqhubeke nokuqina.
5) Thatha ingqikithi. Khipha umumo wegobolondo eliqinile kanye nomgogodla wegobolondo ngaphandle kwesikhunta kanye nebhokisi eliwumgogodla.
