Abstract: The apparatus includes a shared pattern carrier (1), to which an upper and a lower half pattern (2, 3) are secured. Moulding chambers (4, 5) are provided above and below the pattern carrier (1), the moulding chambers having movable squeeze plates (6, 7) for post-compacting of the moulding material and forming top and bottom, respectively, in the moulding chambers. The moulding chambers (4, 5) can be impulsively subjected to vacuum for sucking in moulding material (8) through the squeeze plates (6, 7). The moulding material (8) is fed to the lower moulding chamber (5) through an essentially L-shaped down pipe (9), whose upper end (12) is connected with a materials container (10) above the moulding chambers (4, 5), and whose lower end (11) is connected with the squeeze plate (7) in the lower moulding chamber (5). The lower corner (14) of the L-shaped down pipe (9) is provided with at least one air intake opening (13).

Abstract: A apparatus for making mould parts with a horizontal parting face consists of a container (1) in which is kept moulding material (2), preferably moulding sand, a moulding chamber (3) which may be subjected to vacuum and which may be defined at the bottom by a pattern plate (4) and at the top by a squeeze plate (5). Moulding material (2) is impulsively sucked into the moulding chamber (3) through the squeeze plate (5) and is post-compacted in it by advancing the squeeze plate (5) with the pattern plate (4), which carries a half pattern. The moulding material (2) is sucked into the moulding chamber (3) through a slot (6) placed centrally in the squeeze plate (5). The container (1) is tapered in V-shape at the bottom (7) in the direction of the slot (6) in its entire longitudinal direction. One or more air intake openings (8) are provided on the tapered side faces of the container (1).