Patent ID: 11904511
Assignee: SOCIETA COOPERATIVA MECCANICI IMOLA SOCIETA' COOPERATIVA
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A mould for the production of closures of plastic material with a tear-off membrane, in a compression moulding machine, the mould comprising a male die element, including a first abutment surface, and a female die element, movable relative to each other along a moulding orientation, such that the mould is positionable between a closed configuration, in which the male die element and the female die element are in contact with each other, and an open configuration, in which the male die element and the female die element are spaced apart, wherein the female die element includes:
a first block, a second block and a third block, aligned with each other and movable relative to each other along the moulding orientation;
a first spring, interposed between the first block and the second block;
a second spring, interposed between the second block and the third block and configured to apply an opening force along the moulding orientation to keep the second block and the third block spaced apart when no other forces are applied,
wherein the first spring is configured to apply a closing force along the moulding orientation to keep the second block and the first block in contact with each other when no other forces are applied.