Ovaviu fɔ Valv Kastin

1. Wetin na fɔ kɔst

Dɛn kin tɔn di likwid mɛtal insay wan mold kɔva wit shep we fit di pat, ɛn afta i dɔn sɔlid, dɛn kin gɛt wan pat prodak we gɛt wan patikyula shep, saiz ɛn sɔfa kwaliti, we dɛn kɔl kastin. Tri men ɛlimɛnt dɛn: alɔy, mɔdelin, fɔ tɔn ɛn sɔlidifyeshɔn. Di big bɛnifit: dɛn kin mek kɔmpleks pat dɛn.

2. Divɛlɔpmɛnt fɔ kastin

Prodakshɔn bigin insay di 1930 dɛm yuz nyumɛtik mashin ɛn atifishal kle san prɔses.

Simen sand tayp bin apia insay 1933

Insay 1944, di kol had kɔt rɛsin sand shel tayp bin apia

CO2 hardened wata glas sand mold bin apia insay 1947

Insay 1955, di kayn we we dɛn kɔl thermal coating resin sand shell bin apia

Insay 1958, di furan rɛsin nɔ-bɛk san mold bin apia

Insay 1967, di simen flɔ san mold bin apia

Insay 1968, wata glas we gɛt ɔrganik hardener bin apia

Insay di pas 50 ia, nyu we dɛn fɔ mek kastin mold bay fizik we, lɛk: magnɛtik pɛlɛt mold, vaykum silin mold we, lɔs fom mold, ɛn ɔda tin dɛn Difrɛn kastin we dɛn bays pan mɛtal mold. Lɛk sɛntrifugal kastin, ay prɛshɔn kastin, lɔw prɛshɔn kastin, likwid ɛkstrushɔn, ɛn ɔda tin dɛn.

3. Di tin dɛn we dɛn kin yuz fɔ mek pɔsin in kast

A. Waid adaptabiliti ɛn fleksibiliti. Ɔl di mɛtal matirial prodakt dɛn. Casting nɔ de limited bay di wet, saiz ɛn shep fɔ di pat. di wet kin bi frכm fכ gram to כndrεd tכn, di wכl tik kin bi frכm 0.3mm to 1m, εn di shep kin bi pat dεm we rili kכmpleks.

B. Bɔku pan di raw ɛn ɔgzilari matirial dɛn we dɛn de yuz na bɔku say dɛn ɛn dɛn nɔ dia, lɛk skrap stɛl ɛn san.

C. Kastin kin impɔtant di dimɛnshɔnal akkuracy ɛn surface kwaliti fɔ kastin tru advans kastin teknɔlɔji, so dat dɛn kin kɔt pat dɛn smɔl ɛn we dɛn nɔ kɔt.