Molding unit for the manufacture of containers comprising a compensation gripper
AssigneeSidel Participations
InventorsJocelyn MICHEL, Frederic LECOMTE, Patrice ANDREUX, Michel DAUDIGNY
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Abstract
A molding unit (10) for the manufacture of containers from preforms made of thermoplastic, includes compensating elements which are formed of at least one gripper (60) which acts on mold carriers (16) that carry the mold (12) of the unit (10) in order to clamp them against one another when the molding unit (10) is in the closed position and to apply a compensating force that tends to clamp together molding elements (14) of the mold (12) at a parting line (P) and opposes the forces that a pressurized fluid applies to the molding elements (14) when a container is being molded from a preform.
Claims20
Molding unit (10) for the manufacture of containers from preforms made of thermoplastic material, with said molding unit (10) comprising at least:
- a frame (11) that carries a mold (12) that comprises at least two molding elements (14), each respectively mounted in an associated mold carrier (16),
- at least one of said mold carriers (16) being mounted to move in rotation in relation to the other around a vertical axis (0) of rotation between an open position and a closed position of the mold in which said molding elements (14) are mated with one another by respective support faces (18) defining a longitudinally-oriented vertical parting line (P) and together delimit a molding cavity (20);
- forming means for introducing at least one pressurized fluid inside the preform for the purpose of molding the corresponding container in the cavity (20),
- a control mechanism (30) of the opening and the closing of the mold (12) for controlling the movement of at least one of the mold carriers (16) between said open and closed positions of the mold,
- and selectively controlled compensation means (60) for applying a compensation force, tending to clamp the molding elements (14) against one another in the area of said parting line (P) and to oppose the forces that the pressurized fluid applies on the molding elements (14) during the molding of a container from a preform,
- wherein said compensation means are formed by at least one gripper (60) that acts on the mold carriers (16) to clamp them against one another in the closed position of the molding unit (10) and to apply said compensation force.
Dependencies are inferred from the claim text.