Tire building drum

Abstract

The invention provides a t tire building drum which comprises two half drums. Each half drum comprises a tire ring locking unit, a reverse packing unit located on the outer side in the axial directionof the tire ring locking unit and a contraction area segment located on the inner side in the axial direction of the tire ring locking unit. Each contraction area segment comprises a body, an annularcontraction area which is arranged outside the body in a sleeving manner and can do in the radial direction, an actuating assembly contained in the body and multiple supporting sheet sets, wherein the multiple supporting sheet sets are evenly distributed along the circumference, and the actuating assembly drives the multiple supporting sheet sets to form a supporting face, so that the annular contraction face is at the flushing or contraction position. Each actuating assembly comprises multiple stop parts, and grooves are formed in the stop parts. In the contraction positions, the supportingsheet sets are connected with the grooves in the stop parts in an abutting manner, and circumferential grooves are formed in the contraction area segments. Each body comprises a side wall away from the corresponding tire ring locking unit, and multiple mounting holes are formed in each side wall. The stop parts are mounted in or taken out from the actuating assemblies through the mounting holes. Thus, the building drum has the advantage of high universality.

Description

technical field [0001] The invention relates to the technical field of tire building equipment, in particular to a tire building drum for building tire blanks. Background technique [0002] In order to ensure that the vehicle can continue to drive after a tire blowout or deflation, run-flat tires have been gradually applied to some cars. Current run-flat tires increase sidewall thickness and rigidity by adding a layer of rubber reinforcement to the sidewall. In run-flat tires the rubber reinforcement is inserted between the inner liner and the ply near the bead. After the green tire has been built, the rubber reinforcement extends from the bead in the radial direction of the run-flat tire, axially inward with respect to both the sidewall and carcass ply and axially outward with respect to the innerliner s position. It should be noted that the special structure of the run-flat tire also has corresponding requirements on the structure of the tire building drum. [0003] Ch...

AI Technical Summary

Problems solved by technology

The above-mentioned replacement operation is time-consuming and requires a long shutdown of the entire tire building equipment, and the loss caused by the shutdown of the equipment is very large

In addition, frequent disassembly and assembly of multiple components in the shrinkage section will affect its precision and service life

In short, because the profiled seat ring is not easy to replace, the versatility of the drum is poor and the maintenance is difficult

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