Precautions for the operation of coreless ukufakwa kwesithando somlilo for conventional foundry

The following precautions are well-known to melters and foundries, and are common knowledge not only for coreless induction furnaces but also for all metal smelting operations. This is just for general knowledge and does not involve all types of operations. These matters should be explained clearly and appropriately expanded or perfected by a specific operator.

Imisebenzi yokuncibilikisa kanye nokuphonsa kufanele ikhawulelwe kubasebenzi abanezitifiketi zemfundo, noma izisebenzi eziqeqeshelwe ukuqeqeshwa kwasefekthri nokuhlola, noma imisebenzi ngaphansi komyalo wobunjiniyela abaqeqeshiwe kanye nabasebenzi bezobuchwepheshe efekthri.

Izisebenzi ezisendaweni kufanele zihlale zigqoke izibuko zokuphepha ezinamafreyimu okuzivikela, futhi zisebenzise izihlungi ezikhethekile lapho zibuka izinsimbi ezinezinga lokushisa eliphezulu.

4. Izisebenzi ezisebenza endaweni yomlilo noma eduze kwayo kufanele zigqoke ama-ovaroli angashisi futhi angashi. Izingubo zamakhemikhali zokwenziwa (inayiloni, i-polyester, njll.) akufanele zigqokwe eduze komlilo.

5. Uhlaka lwesithando somlilo kufanele luhlolwe njalo ngezikhathi ezithile ukuze kuvinjelwe “ukuphelelwa amandla”. Ngemva kokupholisa, hlola uhlaka lwesithando somlilo. Lapho ubukhulu bomugqa wesithando somlilo (ngaphandle kwebhodi le-asbestos) bungaphansi kuka-65mm-80mm ngemva kokugqoka, isithando somlilo kufanele silungiswe.

6. Ukwengeza izinto ezisetshenziswayo kufanele uqaphele ukugwema “amabhuloho” wezinto zokwakha. Ukushisa okuphezulu kakhulu kwensimbi ezinhlangothini zombili “zamabhuloho” kuzobangela ukugqwala kwesithando somlilo ukusheshisa.

7. Isithando somlilo esisha se-coreless induction kufanele senziwe ngezinto ezifanele, ezifanele ukuthi insimbi incibilikiswe, futhi yomiswe ngokuphelele ngaphambi kokwengeza izinto zokuncibilikisa. Imithetho ye-sintering yezinto ezibonakalayo kufanele ilandele ngokuqinile lesi sihloko.

8. Izinto ezincibilika kancane njenge-aluminium ne-zinc kufanele zengezwe ngokuqaphela oketshezini olunezinga lokushisa eliphezulu njengensimbi. Uma izithasiselo zamaphuzu okuncibilika aphansi zicwila ngaphambi kokuncibilika, zizobila ngamandla futhi zidale ukuchichima noma ngisho nokuqhuma. Qaphela ikakhulukazi lapho wengeza ishaja ye-tubular.

9. Inkokhelo kufanele yome, ingabi nezinto ezivuthayo, futhi ingagqwali kakhulu noma ibe manzi. Ukubilisa okunamandla koketshezi noma izinto ezivuthayo ekushajelweni kungabangela insimbi encibilikisiwe ukuthi igcwale noma iqhume.

10. Izinsimbi ze-quartz ezihambayo zingasetshenziswa lapho kokubili izithando zokushisa zensimbi ne-coreless zinobukhulu obufanele. Azidizayinelwe ukuncibilika kwezinsimbi ezinokushisa okuphezulu kwezinsimbi. Isitatimende sokusebenza komkhiqizi kufanele sibe umhlahlandlela wokusetshenziswa kwe-crucible.

11. Uma insimbi ihanjiswa ku-crucible, izinhlangothi nangaphansi kwe-crucible kumele zisekelwe ubakaki. Ukwesekwa kufanele kuzame ukuvimbela i-crucible ukuthi ingasheleli ngaphandle ngesikhathi sokuphonsa.

12. Ulwazi olufanele lwekhemistri yokuncibilikisa kufanele luqondwe. Isibonelo, ukusabela kwamakhemikhali njengokubilisa okunobudlova kwekhabhoni kungabangela ukulimala kwemishini kanye nokulimala komuntu siqu. Ukushisa kwesisombululo sokushisa akufanele kudlule inani elidingekayo: Uma izinga lokushisa lensimbi encibilikisiwe liphezulu kakhulu, ukuphila kolwelwesi lwesithando somlilo kuzoncishiswa kakhulu, ngoba ukusabela okulandelayo kuzokwenzeka emgqeni wesithando somlilo we-asidi: SiO2 + 2 (C) [Si] +2COLokhu kusabela kufinyelela ku-1500℃ ensimbi encibilikisiwe Okungenhla kwaqhubeka ngokushesha okukhulu, futhi ngesikhathi esifanayo ukwakheka kwensimbi encibilikisiwe nakho kwashintsha, i-carbon element yashiswa, futhi okuqukethwe kwe-silicon kwanda.

13. Indawo yokwamukela kufanele igcine ivolumu engenamanzi. Ukuthintana kwensimbi eshisayo noketshezi kungabangela ukuqhuma okunamandla futhi kubangele ukulimala komuntu siqu. Ezinye izinsalela zingavimbela insimbi encibilikisiwe ukuthi ingagelezi ethangini elichichimayo noma ibase umlilo.

14. Ithangi elichichimayo kufanele lilungele ukwamukela insimbi encibilikisiwe nganoma yisiphi isikhathi lapho isithando somlilo esingenasisekelo sisebenza. Ukuchitheka kungase kuvele ngaphandle kwesixwayiso. Ngesikhathi esifanayo, uma isithando somlilo sokungeniswa kwe-coreless kufanele sithululwe ngokushesha futhi umgqomo (i-ladle) awufaneleki, isithando somlilo esingenasici singalahlwa ngqo ethangini elichichimayo.

15. Bonke abasebenzi abafaka izitho zokwenziwa, amalunga, amapuleti nokunye okunjalo kufanele baqhelelane nanoma yisiphi isithando somlilo esingenasisekelo. Inkambu kazibuthe eseduze nedivayisi ingakwazi ukusebenzisa amandla amanje kunoma yikuphi ukufakwa kwensimbi. Abantu abanama-pacemaker enhliziyo basengozini ikakhulukazi futhi kufanele baqhelelane nanoma yisiphi isithando somlilo esingenasisekelo.