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US 12,275,182 B2Granted
Moulding unit with bistable magnetic device
AssigneeSidel Participations
InventorsDamien Hellouin, Sébastien Fevre
Life of this patent
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Abstract
The invention relates to a unit for molding containers, which comprises two mold supports, a device for locking the mold supports in the closed position, and a bistable device which comprises a fixed element and a mobile element able to move between two stable extreme positions. The mobile element comprises a mobile magnetic dipole, and the fixed element comprises a fixed magnetic dipole, the fixed magnetic dipole applying a magnetic force from a distance to the mobile magnetic dipole in order to force the mobile element toward one or other of its two stable extreme positions.
Claims20
A station (10) for forming thermoplastic containers, which comprises:
- a unit (18) for molding containers,
- a support frame (20);
- a blowing device (21) capable of translational movement with respect to said support frame (20) between two stable extreme positions, a blow-molding position to blow the preform, and a retracted position allowing the preform to be introduced or the container to be extracted;
- a bistable device (62) which comprises:
- a fixed first element (64) that is fixed with respect to said support frame (20),
- a mobile second element (66) connected to the blowing device (21) and able to move between two stable extreme positions (P1, P2) situated one on each side of an unstable equilibrium intermediate position (P0), and which is connected in terms of movement to the blowing device (21), the mobile second element (66) interacting with the fixed first element (64) to force the blowing device (21) toward its blowing-molding position or toward its retracted position corresponding to each of its stable extreme positions (P1, P2);
- wherein the mobile second element (66) comprises a first magnetic dipole, referred to as the mobile magnetic dipole (68), and the fixed first element (64) comprises at least a second magnetic dipole, referred to as the fixed magnetic dipole (70), the fixed magnetic dipole (70) applying a magnetic force (Fm) from a distance to the mobile magnetic dipole (68) in order to force the mobile second element (66) toward one or other of the stable extreme positions (P1, P2) whatever its position between its two stable extreme positions (P1, P2).
4 more elements
A station (10) for forming thermoplastic containers, which comprises:
- a unit (18) for molding containers, notably by blow-molding preforms;
- a first mold support (22) and a second mold support (24) which are each intended to support part of a mold, the mold supports (22, 24) being mounted with the ability to move one relative to the other between an open position in which they are parted from one another, and a closed position in which they meet;
- a locking device (42) for locking the mold supports (22, 24) in the closed position and which comprises at least one locking member (52) mounted with the ability to move on the second mold support (24) between a locked position in which it collaborates with at least a blocking face (45) of the first mold support (22) so as to prevent the opening of the mold supports (22, 24) and an unlocked position in which the locking member (52) is retracted with respect to the blocking face (45) so as to allow the opening of the mold supports (22, 24):
- a bistable device (62) which comprises:
- a fixed first element (64) that is fixed with respect to the second mold support (24),
- a mobile second element (66) which is mounted with the ability to move on the second mold support (24) between two stable extreme positions (P1, P2) situated one on each side of an unstable equilibrium intermediate position (P0), and which is connected in terms of movement to the locking member (52), the mobile second element (66) interacting with the fixed first element (64) to force the locking device (42) toward its locked position or toward its unlocked position corresponding to each of its stable extreme positions (P1, P2);
- wherein the mobile second element (66) comprises a first magnetic dipole, referred to as the mobile magnetic dipole (68), and the fixed first element (64) comprises at least a second magnetic dipole, referred to as the fixed magnetic dipole (70), the fixed magnetic dipole (70) applying a magnetic force (Fm) from a distance to the mobile magnetic dipole (68) in order to force the mobile second element (66) toward one or other of the stable extreme positions (P1, P2) whatever its position between its two stable extreme positions (P1, P2).
4 more elements
Dependencies are inferred from the claim text.