Nen pa Valve Casting

1. Ango ma ubedo casting

Dhahabu ma pii pii jubolo i vur mi mold ku kit ma rwate ku piny ne, man ingey edoko tek, piny moko ma nen ku kit piny moko, dit man ber pa piny ne ju nwango, ma julwongo ni casting. Piny adek madongo: alloy, modeling, pouring man solidification. Ber madit: dul ma tek copo bedu.

2. Dongo pa casting

Yubu piny ucaku i oro 1930 ku tic ku cuma ma tiyo ku yamo man yore mi yubu lum.

Kit lum ma cement uwok i 1933

I 1944, cold hard coated resin sand shell type uwok

CO2 hardened water glass sand mold uwok i 1947

I 1955, thermal coating resin sand shell type uwok

I 1958, furan resin no-bake sand mold uwok

I 1967, cement flow sand mold uwok

I 1968, kopo mi pii ku piny ma tek uwok

I kind oro 50 mukadho, yore manyen mi yubu jamb tedu ku yore mi nen, calu: magnetic pellet molding, vacuum sealing molding method, lost foam molding, etc. Yore matung tung mi yiku jamb tiyo ku cuma. Calu centrifugal casting, high pressure casting, low pressure casting, liquid extrusion, man mukende mapol.

3. Kit pa casting

A. Bedo ku copo mi loko kwo man bedo yot. Piny ceke ma juyubu ku cuma. Casting epe ku pek, dit man kite pa piny ne. Pek copo bedu gram manok nituc i ton miya mapol, lac pa cel copo bedu nicaku 0.3mm nitundu 1m, man kite copo bedu piny ma nyang ikume tek.

B. Pol pa piny ma jutiyo kudu ma podi jutiyo kudu man ma jukonyo kudu juyubu kamabor man wel migi yot, calu steel man lum.

C. Castings copo medo rwom pa piny man ber pa castings nikadhu kud i diro mi casting ma malu, kara jucopo poko piny manok man ma jupoko ngo.