Isihlabathi se-resin yisihlabathi esibumbayo (noma isihlabathi esiwumgogodla) esilungiswe nge-resin njenge-binder. I-resin coated sand casting ibizwa nangokuthiukubunjwa kwegobolondongoba isikhunta sesihlabathi se-resin singaba siqinile sibe igobolondo eliqinile ngemuva kokushisisa nje endaweni yokushisa yegumbi (inqubo yokungabhaki noma yokuziqinisa), ehlukileinqubo yokuphonsa isihlabathi esiluhlaza. Ukusetshenziswa kwe-furan resin njengesibopho sokubumba isihlabathi kuwushintsho olukhulu enqubweni yokuphonsa isihlabathi. Selokhu kwavela le ndlela, isidonse ukunaka kwemboni yokulingisa futhi ithuthuke ngokushesha. Njenge-resin yokubumba isikhunta (core) sand binder, izinhlobonhlobo nekhwalithi zikhula njalo, ezingahlangabezana nezidingo zama-alloys ahlukahlukene.
Ngenxa yokusetshenziswa kwesihlabathi se-resin, izinqubo eziningi ezintsha zokubumba (core) ziye zavela ngokulandelana, njenge-shell core (shape), ibhokisi elishisayo, ibhokisi elibandayo, umgogodla wesihlabathi oziqinisayo, njll. Njengamanje, ukusetshenziswa ye-resin sand isibe esinye sezimo eziyisisekelo zokukhiqiza ngobuningiukusakaza kwekhwalithi ephezulu. Ezingqungqutheleni zokwenziwa kwesihlabathi zokwenziwa kocezu olulodwa kanye nokukhiqizwa ngobuningi, ukukhiqizwa kwezinhlamvu zesihlabathi kanye nokubunjwa kwesihlabathi ngesihlabathi se-resin kuyindlela evamile, futhi ukuthuthukiswa kuye kwaba ngokushesha ikakhulukazi eminyakeni yamuva.
Izinzuzo ze-Resin Coated Sand Casting:
1. Ukulingisa kunekhwalithi enhle yendawo kanye nokunemba okuphezulu kobukhulu;
2. Asikho isidingo sokoma, lapho sokunciphisa umjikelezo wokukhiqiza;
3. Inqubo yokubunjwa kwesikhunta sesihlabathi se-resin yonga amandla ngoba isikhunta sesihlabathi se-resin (umgogodla) sinamandla amakhulu, ukungena komoya okuhle, amaphutha ambalwa okuphonsa kanye nezinga eliphansi lokwenqatshwa;
4. Isihlabathi se-resin sine-fluidity enhle futhi kulula ukuhlanganisa;
5. Ukugoqeka okuhle, kulula ukukunyakazisa nokuhlanza, kunciphisa kakhulu amandla omsebenzi.
Ububi benqubo yokusakazwa kwe-Resin Sand Mold:
1. Ngenxa yokuthi usayizi wesihlabathi esingahluziwe, umumo, okuqukethwe yi-sulphur dioxide kanye nezinhlanganisela ze-alkaline kungaba nomthelela omkhulu ekusebenzeni kwesihlabathi se-resin, izidingo zesihlabathi esingavuthiwe ziphakeme;
2. Izinga lokushisa kanye nomswakama wendawo yokusebenza kunomthelela omkhulu esivinini sokuqina namandla okuqina kwesihlabathi se-resin;
3. Uma kuqhathaniswa nezibophezelo ze-inorganic, isihlabathi se-resin sinenani elikhulu legesi;
4. I-resin kanye ne-catalyst inephunga elimnandi, futhi kuyadingeka ukungena komoya okuhle endaweni yokusebenzela;
5. Intengo ye-resin iphakeme kunokukhishwa kwesihlabathi esiluhlaza.
Isihlabathi se-resin esisetshenziswa kakhulu yiisihlabathi se-furan resin esiziqinisayo. I-Furan resin isekelwe ku-furfuryl alcohol futhi yethiwa ngendandatho ye-furan eyingqayizivele esakhiweni sayo. Ngokwesakhiwo sayo esiyisisekelo, kukhona i-furfuryl alcohol furan resin, i-urea formaldehyde furan resin, i-phenolic furan resin kanye ne-formaldehyde furan resin. I-Furan resin ivame ukusetshenziswa njenge-binder lapho kulungiswa isihlabathi esiziqinisayo se-resin ekukhiqizeni. I-Furan resin esetshenziselwa isihlabathi sokuzibekela inokuqukethwe okuphezulu kakhulu kwe-furfuryl alcohol, ukusebenza okuthuthukisiwe kokugcinwa kwe-resin, amandla aphezulu okushisa, kodwa izindleko ezikhulayo.
Isihlabathi esiziqinisayo se-Furan resin sibhekisela ohlotsheni lwesihlabathi (umgogodla) i-furan resin binder ebhekana nokusabela kwamakhemikhali ngaphansi kwesenzo se-catalyst bese siqina ekamelweni lokushisa. Isihlabathi se-Furan resin ngokuvamile sakhiwe ngesihlabathi esingavuthiwe, i-furan resin, i-catalyst, izithasiselo, njll. Ikhwalithi nokusebenza kwezinto ezihlukahlukene zokusetshenziswa kuzoba nomthelela omkhulu ekusebenzeni kwesihlabathi se-resin kanye nekhwalithi yokubunjwa, ngakho-ke kubaluleke kakhulu khetha kahle izinto zokusetshenziswa ezahlukahlukene zesihlabathi se-resin.
Isikhathi sokuthumela: Mar-08-2021