METHOD OF PRODUCING ARTICLES WITH CAVITIES BY THIXOMOULDING AND CLOSED MOULD TO THIS END

摘要

FIELD: process engineering. ^ SUBSTANCE: invention relates to metallurgy and may be used in moulding complex-shape articles from aluminium alloys by thixomoulding. Billet is deformed in closed mould at press. Billet is pierced by top male die and bottom fixed male die. At the same time, deformed metal is supported by press pusher forced downward by metal pressure. Note here that cavity for surplus metal is formed. Then die forging is carried out by acting by pusher on surplus metal. Note also that pusher diameter is defined by relationship cited in description. ^ EFFECT: uniform filling of mould cavities, higher quality of moulded articles. ^ 2 cl, 3 dwg