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US 4,395,209 AGranted
Tire press
AssigneeNRM Corporation
InventorsAnand P. Singh, Daniel Shichman
Life of this patent
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AssigneeNRM Corporation
InventorsAnand P. Singh, Daniel Shichman
Estimating the term…
A tire curing press has a loader assembly comprising a bead grip for engaging and lifting the axial interior of the upper bead of a green tire and a tread positioning ring movable axially to an adjusted position to engage the tire tread shoulder and to force a predetermined distance between the upper bead and tread to identify precisely the transaxial middle or crown plane of the tread. The loader includes means to swing the bead grip and tread register from a tire pick-up position to a load position centered in the press and to position the lower bead of the green tire on or close to a movable toe ring, and then to lower the bead grip, tread register and toe ring uniformly with the green tire held open and firmly therebetween to match the transaxial middle plane of the tread to that of a bladder mounted in a center mechanism in the press by independently movable top and bottom bladder bead clamps. Adjustable mechanical stops and pilots are utilized for obtaining alignment of the movable press components with respect to one another and for accommodating different sizes of tires being processed. The center mechanism is mounted in a movable mounting sleeve, the upper end of which supports the toe ring. The sleeve is mounted in a well and the bottom plate of the mounting well is provided with passages for circulation of coolant therethrough to isolate the center mechanism hydraulic actuators mounted on and beneath such plate from the heat generated in the press cavity.
A tire curing press assembly comprising mating mold sections, means to open and close said mold sections, a center mechanism including an inflatable shaping and curing bladder, bead grip means for engaging the interior underside of the upper bead of a green tire, and means for engaging and holding the tread of the green tire away from said bead grip means to hold open the tire with the upper bead and tread held apart in fixed axial relation to one another to facilitate insertion of said bladder into the green tire.
In combination, a tire curing press, a center mechanism for said press, said center mechanism comprising a post and shaping bladder, a top bladder clamp mounted on and secured to said post, a bottom bladder clamp slidably mounted on said post, mechanical stop means within said press to limit elevation of said bottom bladder clamp to obtain a shaping reference point with the top bladder clamp down and butted thereagainst, and means externally of said press operably connected to said mechanical stop means for adjusting said mechanical stop means.
A tire curing press comprising top and bottom mating mold sections, means to open and close said mold sections, a center mechanism including a shaping and curing bladder and relatively vertically movable top and bottom bladder rings for said bladder, said bladder having a horizontal center plane when inflated, means to position a tire in the press, and means to locate said bladder rings against each other at a reference plane to position the horizontal center plane of the bladder within the axial extent and in precise relationship to the transaxial center line of the tire prior to pressure shaping the bladder into the tire.
A tire press comprising a bottom press half with a top press half movable vertically to open and close the press, a mounting well in said bottom press half, a center mechanism mounted in said mounting well, said center mechanism including a shaping and curing bladder and means operative to manipulate said bladder during tire loading and unloading, said means including at least one piston-cylinder assembly, the cylinder of said assembly being mounted on and beneath said mounting well and the rod of said assembly extending through said mounting well, and means for cooling said mounting well to isolate the fluid in said piston-cylinder assembly from the heat in the press.
Dependencies are inferred from the claim text.