MOULD PROVIDED WITH A MOBILE BLOCK

摘要

The mold (60) has a block that is movable between molding and demolding positions. One of a metal member (82) and a electromagnetic system (80) e.g. polarisable magnet, is arranged on a part i.e. movable shutter (74), connected with a mold part, and the other one of the metal member and the magnet is arranged on another part connected to the block so as to allow the metal member and the magnet to face each other when the block is in the molding position. An elastic recall unit i.e. helical spring (84), generates force on the block restoring to the demolding position.