Giant engineering radial tire mechanical turn down and turn up device

Abstract

The invention discloses a giant engineering radial tire mechanical turn down and turn up device. The giant engineering radial tire mechanical turn down and turn up device comprises a turn down and turn up push rod opening and closing mechanism and a turn up device, wherein the turn up device comprises a pull-out ring and a expanding-collapsing mechanism; the turn down and turn up push rod opening and closing mechanism comprises a base frame; multiple turn down and turn up push rods are circumferentially hinged to the base frame; one end of the base frame is provided with a retaining ring disc; the retaining ring disc moves axially driven by a retaining ring disc cylinder, and is circumferentially provided with multiple retaining ring claws; the base frame is also circumferentially provided with multiple push plates; and each push plate is arranged on the base frame through a guide rod and can move axially driven by a push plate cylinder. According to the giant engineering radial tire turn down and turn up device, turn down and turn up are combined into a whole, so that a cord fabric tire bead is more compact and stable during turn up; and internal air can be easily discharged so that a cord fabric drum is more compact after turn up. Bladder turn up is omitted, so that the possibility that a high-pressure bladder explodes is avoided, and the safety is greatly improved.

Description

technical field [0001] The invention relates to a tire building machine, in particular to a mechanical front and back wrapping device for giant engineering radial tires. Background technique [0002] The front and back wrapping device of the tire building machine is the core component of the tire building machine. The traditional front and back wrapping devices include capsule front wrapping, finger-shaped wrapping; finger-shaped wrapping, capsule turn-back wrapping; form. Among them, the capsule turn-up device has problems such as fragile capsules and difficult replacement, uniform but not tight wrapping at the junction of the cord and the traveler root, high difficulty in processing the finger pieces, and high cost. [0003] The application number of the Chinese patent "Finger-shaped front and back wrapping device for tire building machine" is 200810073479.6. The pull ring device that the shape bar tensioning mechanism turns up the steel cord; the turn-up pull ring devic...

AI Technical Summary

Problems solved by technology

In the above-mentioned patent, an air motor is used as the power of the finger rod opening and closing mechanism. The air motor can only control the lead screw to extend or retreat in one direction. At the same time, it is difficult to guarantee the accuracy of the pneumatic control. If the operation is wrong, it may collide and cause the forming drum or the turn-up rod to be bent, deformed and scrapped. The risk is extremely high, and the device has a large safety hazard; and the device in the above patent is not stable after the buckle ring is returned. , so that the cord bead is not tight when it is turned up, and the stability is poor

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