Sand casting: Valve industry-a hman tlanglawn tak sand casting pawh hi sand chi hrang hrangah then theih a ni a, chu chuwet sand, dry sand, water glass sand leh furan resin no-bake sand te a awm bawkbinder hrang hrangte angin.
(1) Green sand hi molding process method a ni a, hnathawhnaah hian bentonite hi binder atan hman a ni. A mizia chu: sand mold siam zawh tawh chu a vawt a ngai lo emaw, special hardening treatment a paltlang emaw a, sand mold hian wet strength engemaw chen a nei a, sand core leh shell hian concession tha zawk a nei a, hei hi casting cleaning leh falling sand atan a awlsam hle. Molding production efficiency a sang a, production cycle a tawi a, material cost pawh a hniam a, hei hi assembly line production buatsaih nan a awlsam hle. A that lohna chu: casting-ah hian pores, sand inclusions, leh sticky sand ang chi chhiatna a awm fo a, casting quality, a bik takin a chhung lam quality chu a tawk lo hle.
(2) Dry sand hi modeling process a ni a, leilung hi binder atan hman a ni a, bentonite tlem te hian a wet strength a ti tha thei a ni. A mizia chu: sand mold hi a vawt a ngai a, boruak luh theihna leh boruak a darh tha hle a, sand washing, sand sticking, leh pores ang chi chhiatna siam a awlsam lo va, casting chhungril quality pawh a tha tawk hle bawk. A that lohna chu: sand drying hmanrua a ngai a, a siam chhuah hun pawh a rei hle.
(3) Sodium silicate sand hi moulding process method a ni a, water glass chu binder atan hman a ni. A mizia chu: water glass hian CO2 a tawn hnuah automatic-a harden theihna hna a nei a, gas hardening modeling leh core making-ah pawh thatna leh thatna hrang hrang a nei thei bawk. Mahse, a chhiatna a awm a, chu chu shell collapsibility tha lo, casting atana sand tihfai harsatna, leh sand hman tawh recycling rate hniam te hi a ni.
(4) Furan resin no-bake sand molding hi casting process method a ni a, furan resin chu binder atan hman a ni. Room temperature-ah chuan curing agent hnathawh hnuaia binder-in chemical reaction a neih avangin molding sand chu a cured a ni. A ziarang chu: sand mold chu a vawt a ngai lo va, hei hian a siam chhuahna cycle nasa takin a ti tawi a, energy a humhim bawk. Resin molding sand hi a compact awlsam hle a, collapsibility tha tak a nei bawk a, castings molding sand pawh awlsam taka tihfai theih a ni a, castings dimensional accuracy a sang a, surface finish a tha a, hei hian casting quality nasa takin a tisang thei a ni. A that lohna chu: raw sand quality mamawh pawh a sang a, a siamna hmunah hian rimtui deuh a awm a, resin man pawh a to hle. Furan resin self-hardening sand mixing process: Resin self-hardening sand hi continuous sand mixer hmanga siam a tha ber a, raw sand, resin, curing agent, etc. te chu a inthlak a, a inthlak a, rang takin mix a ni. Mix la, engtik lai pawhin hmang rawh. Resin sand kan pawlh huna raw material hrang hrang dah dan tur chu hetiang hi a ni: original sand + curing agent (p-toluenesulfonic acid aqueous solution) – (120-180S) – resin + silane – (60-90S) – sand (5) Typical sand type Casting production process: precision casting.
Post hun chhung: Aug-17-2022
