Plastic mould for moulding concrete test cubes

摘要

1. Plastic mould for moulding concrete test cubes, which has been prepared of structurally foamed polyolefin of 0,5 to 0,85 g/cm**3 density by extrusion as a sandwich construction having peripheral walls (1) with ribs (5) and a bottom (2), which has been strengthened by a peripheral flange (3) having at least three protrusions (8) and an inner rim (4) standing by 0.2 to 2.0 mm higher than the outer rim thereof, and which has been provided in the center of the bottom (2) with a conical hole (6) diverging in the direction toward the hollow (7) of the mould.