(57) In a machine for the simultaneous production of a pair of associated upper and lower
casting mould parts in pressing chambers (3, 4) which are movable towards and away
from an intermediate pattern carrier (5), and for joining the mould parts after drawing
off and lateral removal of said carrier, the pressing chamber walls (13, 14) have
sand introduction openings (22) as well as evacuation ports (16) which by displacement
of the walls in relation to the pattern carrier come into and out of position to communicate
with a sand store (2) and a vacuum source, respectively, in order to produce vacuum
in the chambers.
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