METHOD AND DEVICE FOR DIE CASTING WITH CRYSTALLIZATION Russian patent published in 1999 - IPC

FIELD: manufacture of various parts of non-ferrous metals and alloys. SUBSTANCE: melt is cast in the working chamber, molten metal is displaced from the working chamber through a gating system into the mould cavities of the multicavity mould and subsequent premoulding. Premoulding in the process of crystallization is accomplished by recoverable deformation of mould members by a value equal to or exceeding the residual porosity of parts. The device has a multicavity mould with moulding blocks connected to the working chamber cavity of the gating system, driving intermediate plate with central and peripheral holes. Each moulding block is made of three parts-bush, punch and die; and the working chamber plunger us step-shaped in its middle section. The driving intermediate plate is mounted for movement on guide columns between the base and slide. The bushes and punches of the moulding blocks are installed in the peripheral holes of the plate, which allows them to be recoverably deformed under the action of the extrusion force and provide premoulding of castings. EFFECT: eliminated porosity, enhanced output of applicable products. 3 cl, 3 dwg, 1 ex