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US 6,120,722 AGranted
Tiebar removal method and apparatus
AssigneeHusky Injection Molding Systems Ltd.
InventorRobert D. Schad
Life of this patent
Estimating the term…
Abstract
A tiebar removal method and apparatus for tiebar removal in a two (2) platen injection molding machine wherein some of the tiebars may be removed while others remain in the injection molding machine.
Claims22
Method for removing tiebars, which comprises:
- providing a horizontal clamp device having two platens, with a movable platen and a fixed platen and with a plurality of tiebars extending therebetween and with at least one mold half affixed to each platen and with at least one of the tiebars being removable and the balance being non-removable;
- clamping the removable tiebars to the stationary platen, and fixedly securing the non-removable tiebars to the stationary platen;
- moving the movable platen to a mold open position;
- clamping each tiebar to the movable platen;
- unclamping the tiebars to be removed from the stationary platen while leaving the non-removable tiebars fixedly secured to the stationary platen;
- unclamping the non-removable tiebars from the movable platen;
- and
- moving the movable platen away from the stationary platen with the removable tiebars disengaged from the stationary platen and solely supported by the movable platen while the non-removable tiebars remain fixedly secured to the stationary platen, to permit removal of the removable tiebars.
5 more elements
Apparatus for removing tiebars, which comprises:
- a horizontal clamp device having two platens, with a movable platen and a stationary platen, wherein the movable platen is movable relative to said stationary platen to form a mold closed and mold open position;
- a plurality of tiebars extending between the movable and stationary platen with at least one of said tiebars being removable and the balance being non-removable;
- at least one mold half adjacent to each platen;
- clamping means to clamp each tiebar to the movable platen, clamping means to clamp the removable tiebars to the stationary platen, and means to fixedly secure the non-removable tiebars to the stationary platen;
- means to unclamp the removable tiebars from the stationary platen while leaving the non-removable tiebars fixedly secured to the stationary platen;
- means to unclamp the non-removable tiebars from the movable platen while leaving the removable tiebars clamped to the movable platen;
- means to move the movable platen away from the stationary platen to disengage the removable tiebars from the stationary platen wherein the removable tiebars are solely supported by the movable platen;
- whereby the movable platen may be moved away from the stationary platen with the removable tiebars disengaged from the stationary platen while the non-removable tiebars remain secured to the stationary platen to permit removal of the removable tiebars.
5 more elements
Dependencies are inferred from the claim text.