Ungakuvimbela Kanjani Ukulimala Kwe-Poposion Okubangelwa Umswakama Okwengeziwe Ngesikhathi Sokukhiqizwa Kwezinkampani Ezihlanganisiwe Esebenzisa Ubuchwepheshe Besihlabathi Eseduze Ehlobo?

Ehlobo, kunokwanda okukhulu kwesizathu sokulimaza lapho usebenzisa isihlabathi esihlanganisiwe ukukhiqiza ama-castings, okuhlobene nomswakama ophakeme womoya kanye nokwenyuka kwemvula ehlobo. Ukuze ubhekane nokwanda kwe-porosity esihlabathini esihlanganisiwe sasehlobo, zombili amabhizinisi ahlanganisiwe wesihlabathi kanye namathole adinga ukuthatha izinyathelo zokuqeda umkhathi we-porosing ekukhiqizweni kwesihlabathi okuhlanganisiwe.

1. Izinyathelo ezizothathwa ngumphakeli wesihlabathi ohlanganisiwe: Ukulawulwa kwezinto ezibonakalayo kanye nokwelashwa kwesihlabathi: ukomisa ngokuqinile izinto ezivuthiwe zesihlabathi (njenge-quartz sand) ukuqinisekisa okuqukethwe umswakama ongaphansi kuka-0.2%. Zingafudunyezwa ziye ku-100-150 ℃ zisebenzisa imishini yokomisa (efana nesithando sokomisa (esibilayo sokomisa) amahora angu-2-4 ukunciphisa umswakama ama-adsorbed yizinhlayiya zesihlabathi. I-Resin nokwelapha i-agent agent umswakama-bufakazi: indawo yokugcina i-phenolic resin kanye ne-ejenti yokwelapha (njenge-urotropin) kufanele igcinwe yomile, kulawulwa ngomswakama ngaphansi kwama-40% -50% ngaphansi kwama-40% -50%. Ngemuva kokuvula, sebenzisa ngokushesha ngangokunokwenzeka ukugwema ukuvezwa isikhathi eside komoya onomswakama. Ngaphezu kwalokho, ukuhanjiswa kwesihlabathi esihlanganisiwe kufanele kulandelwe ngesikhathi esifanele ukuqapha ukusetshenziswa kwesihlabathi kwe-sandry, nokuholwa kanye nezikhumbuzi kufanele kunikezwe i-wadry ekuvinjelweni komswakama nokususwa kwesihlabathi esinomswakama. Ukulungisa amapharamitha enqubo ukunciphisa izinga lokuxutshwa kwesihlabathi kanye nesikhathi: Lawula izinga lokushisa ku-80-100 ℃ ngesikhathi sokuxuba kwesihlabathi, futhi ugweme ukungqubuzana okwedlulele ngenxa yezimpawu zomswakama eziphakeme ukuze ukhiqize ama-adsorplicatic adsorpr of water umphunga wamanzi.

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a. Izindlela zokuqapha zokwenza ngcono izimo zelapha ngesikhathi sokwenza amagobolondo: Khulisa izinga lokuphumula ngokufanele (okufana no-210 ℃ kuya ku-300 Ngeza izengezo zomswakama we-anti: lapho uxubana nesihlabathi, engeza i-calcium stearate noma ama-silicone oil agents-proof agents ngesilinganiso esingu-0.5% -1% ukwakha i-hydrophobic film ngaphezulu kwezinhlayiya zamanzi, ivimbela ama-adsorption wamanzi. Ukulawulwa komswakama wendawo: faka ukugeleza kwesendlalelo komile ngaphezu komshini owenza umgogodla bese wethula umoya owomile ngomswakama ongaphansi kwama-50% kanye nokushisa kuka-30-40 ℃ ukuqinisekisa ukumiswa komhlaba okusheshayo; Umswakama ophelele endaweni yokusebenzela ulawulwa ngaphansi kwama-60% usebenzisa i-dehumidifier (nge-dehumidiirier eyodwa yamandla aphezulu afake njalo amamitha-skwele ayi-100). Ukulawula nokupholisa ukulawula: Masinyane beka isisekelo sesihlabathi endaweni yokujikeleza komoya ku-50-60 ℃ amahora angu-1-2 ngemuva kokuthola isibani se-infrared ukusheshisa umhwamuko wamanzi asele; Lapho kuphola, gwema ukuvezwa ngqo emoyeni bese uwafaka ezingxenyeni zomisha. Lungiselela uhlelo lokuthulula ngokufaka intambo yokuphelelwa amandla (ububanzi obungu-35mm) ngaphakathi komgogodla wesihlabathi, ukuvula i-groove ephumayo (ukujula u-0.3mm, i-widel 20mm) engxenyeni evulekile yesihlabathi, bese ufaka ipayipi lensimbi elivulekile, bese ufaka ipayipi lensimbi engu-8mm elivuthiwe kulondolozi. Amapharamitha wokuhlola isihlabathi kufanele abheke amandla ashubile egobolondo lesihlabathi noma umnyombo, okufanele alingane no-2,8 megapascass. Ehlobo, u-10% wamandla ashubile anikezwe uma uqhathaniswa nezinye izinkathi zonyaka. Ukutholwa kwegesi Yesizukulwane: Kufanele kube ngaphansi noma kulingana no-16ml / g (kuhlolwe ku-950 ℃). Lapho ingxenye yama-pores inyuka, kufanele kuthathwe izinyathelo zokuchazwa kwamazinyo. Lapho ama-pores enzeka kaningi, xubha igobolondo lesihlabathi nge-zinc oxide okotshwala enhlamba (isilinganiso 1: 3). Ngaphambi kokubumba, sebenzisa isifutho sophethiloli ukuze ukhulule ingaphezulu le-Shell Shell eSand noma i-Sand (izinga lokushisa ku-150 ℃, isikhathi esikhulu kune noma elilingana nemizuzwana engama-30)

b. Ukusebenziseka kahle kwenqubo yokuthela kanye nokuthulula uhlelo lwe-System: Lungiselela ukwakheka, ukukhulisa iziteshi zokuphelelwa amandla (njengokuvula izintambo zokushisa phezulu kwesihlabathi somugqa wesihlabathi ophakathi nendawo ye-liquid yomugqa we-liquid yomugqa wokuphonsa we-liquid Imigqa yesigaba se-liquid of castings eyenziwe ngezinto ezahlukahlukene nayo inezigaba ezahlukahlukene, ezidinga ukubalwa. Isibonelo, ezingxenyeni zensimbi ezimpunga, okuqukethwe yi-carbon kungu-3.2-3,5%, okuqukethwe yi-silicon kungu-1.8-2.2%, futhi izinga lokushisa le-liquingus lingaba ngu-1180 ℃. I-Carbon iphakathi kuka-2.9-3.2%, i-silicon iphakathi kuka-1.6-1.8%, futhi izinga lokushisa le-liquidius lizungeze i-1230 ℃. Amazinga okushisa afanele ampunga we-iron grey cast yi-liquingus line + izinga lokushisa elishisayo le-120-150 ° C, lilandelwa ukuguqula ubukhulu bokuphonswa kodonga lokuphonswa okuhlangene. Kwezingxenye eziyinkimbinkimbi zejometri omncane, izinga lokushisa eliphakeme lithathwa njengomkhawulo ophezulu, bese lingezwa cishe ngomkhawulo we-30-50 °

I-3. Ukuqapha isikhathi sangempela komswakama ngokuhlolwa kwenqubo kanye nempendulo: Izinzwa zomswakama zifakwe ngezinqubo ezisemqoka ezifana nokuxuba kwesihlabathi, ukubumba, nokuthulula ukubheka ushintsho kumswakama wezemvelo ngesikhathi sangempela. Lapho umswakama udlula ama-65%, izindlela zokuvikelwa kwezimo eziphuthumayo zisebenza ngokushesha. Ukuhlolwa kwamandla kwesinkwa sesihlabathi (ama-cores): Ngemuva kokuqokwa ngakunye kwesinkwa (ama-cores) akhiqizwayo, amasampula athathwa ekuvikeleni kwamanani entengo egumbini lokufaka amandla. Uma amandla encipha ngaphezu kwe-10%, amapharamitha enqubo adinga ukulungiswa noma izinto ezingavuthiwe zidinga ukushintshwa.

Izinyathelo ezingenhla zinganciphisa ngempumelelo umthelela womswakama womoya wasehlobo kwi-film camera sand cated sand ukuphonsa futhi unciphise inkohliso ye-polority. Ekukhiqizweni kwangempela, amapharamitha adinga ukuguqulwa ngokuya ngemishini ethile nezimpawu ezibonakalayo ezingavuthiwe. Uma kunesidingo, inani elincane le-agent-proof agent (efana ne-calcium stearate) ingangezwa ukuze kuthuthukiswe umthamo wokutholwa komswakama wesihlabathi isikhunta.