Patent ID: 6241509
Filing Date: 2001-06-05
Classification: B29C

Abstract:
A tiebar construction for an injection molding machine, comprising: a stationary platen; a movable platen which is movable with respect to the stationary platen from a closed position in clamping engagement with the stationary platen to an open position spaced from the stationary platen; at least two hollow tiebars connecting the stationary platen to the movable platen; a stroke cylinder including a stroke cylinder rod within at least two of said tiebars operative to move the platens from an open to closed position and from a closed to open position; wherein said at least two tiebars are fixed at one end only to one platen and said stroke cylinder rods are fixed at one end only to the other platen; releasable clamping means to clamp the platens together in the closed position; and engagement means carried by at least two of said tiebars to engage said clamping means.