Device for producing castings that comprises a wall can be guided into the casting mold

Abstract

The invention relates to a device for producing castings from flowable or strewable starting material. Said device comprises an injection unit, out of which the at least partially liquefied material can be injected into a casting mold. The injection unit has an inlet opening for supplying the material, and the injection unit has a chamber with two moveable walls. These walls can either be moved together in one direction or in opposite directions in such a manner that the volume of the interior of the chamber can be altered as desired and/or the interior of the chamber can he displaced, whereby one or both walls form a portion of the wall delimiting the mold cavity. The invention provides that both walls each form a portion of the wall delimiting the mold cavity, whereby one of the walls can be guided into the casting mold.

1 . Device for producing castings out of fusible or dispersible base material, 
 including an injection unit from which the at least partially liquefied material can be injected into a mold,    wherein the injection unit has an inlet port for feeding the material,    and wherein the injection unit has a chamber with two movable walls which may as desired be moved either together in the same direction or in opposite directions so that the cavity of the chamber may be varied by volume as desired and/or be displaceable,    one of the two walls forming a section of the wall delimiting the mold cavity ( 9 ),    characterized in    that the two walls each form a part of the walls delimiting the mold cavity ( 9 ),    one of the two walls being movable into the mold ( 2 ).    
     
     
         2 . Device according to  claim 1 , characterized in that the wall which is movable into the mold ( 2 ) is designed as a piston ( 8 ) which is supported within a tubular chamber wall so as to be longitudinally movable or is supported so as to be movable toward chamber ( 5 ) to perform a sealing function, and that this wall is movable together with a movable mold section ( 11 ) of mold ( 2 ).  
     
     
         3 . Device according to  claim 1 , characterized in that the wall which is movable into mold ( 2 ) is designed to partially determine the surface shape of the casting.