Ife tonse tikudziwa zimenezombiri za aluminiyamu mafakitalendi aloyi extrusion zipangizo. Zolakwika ntchito sitepe imodzi kupanga ndi processing ndondomeko mosavuta kuwononga zinthu ndi pamwamba zilema za mbiri. Mtundu wapamtunda wa mbiri yabwino ya aluminiyamu uyenera kukhala woyera wasiliva. Apa ndikulankhula mwachidule za zifukwa za chikasu chodabwitsa chomwe nthawi zambiri chimapezeka pamwamba pa mbiriyi kuwonjezera pa roughness ndi dullness.

Mbiri ya siliva yoyera ya aluminiyamu

Pali zifukwa ziwiri zazikulu za chikasu cha pamwamba pa mbiriyo. Imodzi ndi njira yoziziritsira yosayenera panthawi ya extrusion ya mbiriyo, ndipo ina ndi yosayenera pamwamba pa mankhwala. Kusanthula kwapadera kuli motere:

1. Mbiriyo iyenera kuziziritsidwa itatha kutulutsidwa ndi kufa, kuti ipititse patsogolo makina ndi zinthu zakuthupi. Kuziziritsa kumafunika kugwiritsidwa ntchito pozizira, ndipo zida zosiyanasiyana zimakhala ndi zoziziritsa zosiyanasiyana. Zomwe zimakonda kwambiri ndi madzi kapena mafuta oziziritsa kukhosi. Ngati madzi agwiritsidwa ntchito kuziziritsa kapena kuchuluka kwa mkuwa mu choziziritsira kumakhala kwakukulu, ndikosavuta kupangitsa kuti pamwamba pawonekedwe kukhala chikasu. Chifukwa chake ndi chakuti aluminiyumu ndi chinthu chogwira ntchito chachitsulo, ndipo chimakonda kukhudzana ndi zinthu zomwe zili mumlengalenga ndi madzi.

2. Pamwamba pazithunzi za aluminiyamu za mafakitale zimamangiriridwa ndi filimu ya oxide, yomwe imatha kuonjezera kukana kwa dzimbiri ndi kukongola kwapamwamba kwa mbiriyo. Pamaso mankhwala pamwamba mbiri, mbiri extruded ayenera kutsukidwa kuchotsa mafuta pamwamba. Ngati pamwamba pa mbiriyo si kutsukidwa bwino, n'zosavuta chifukwa okusayidi filimu kukhala kovuta mtundu mu wotsatira makutidwe ndi okosijeni ndondomeko, kapena mitundu adzakhala wosiyana, ndi chikasu chidzachitika.