Gaineamh teilgcheárta ceirmeach le haghaidh próiseas gaineamh glas

Green Sand Castings are castings made using wet sand or “green sand” molds. The sand is not green in color nor do the molds use “greensand,” a greenish color sandstone. Instead of the sand is called “green” because it has moisture in it (like green wood) before the sand dries out when molten metal is poured in the mold.

What gives the sand moisture and helps the sand stick together when making molds is the clay that is mixed in the sand. Bentonite clay and the sand mixed together provide strong molds that can be created on an automated assembly line.

Déantar gaineamh teilgcheárta ceirmeach sintered den chuid is mó de mhianraí ina bhfuil Al2O3 agus SiO2 agus cuirtear le hábhair mhianracha eile é. Gaineamh teilgcheárta sféarúil déanta ag próisis púdar, pelletizing, shintéirithe agus grádaithe. Is é Mullite agus Corundum a phríomh-struchtúr criostail, le cruth grán cruinn, teasfhulangacht ard, cobhsaíocht mhaith teirmeimiceach, leathnú teirmeach íseal, tionchar agus friotaíocht scríobach, gnéithe ilroinnte láidir. Nuair a bheidh an gaineamh ceirmeach i bhfeidhm sa phróiseas gaineamh glas, d'fhéadfadh sé cur leis na hamanna athúsáidte gaineamh amh, laghdaigh astaíochtaí gaineamh dramhaíola, toradh réitigh feabhsaithe.