Tyre forming drum

Abstract

The invention provides a tyre forming drum. The tyre forming drum is provided with an attaching surface for receiving a first tyre layer, is further provided with two supporting segments which are axially arranged in a spacing manner, wherein the first tyre layer axially extends to cross the two supporting segments, each supporting segment is provided with a plurality of rotators which are uniformly distributed in the circumferential direction, the rotators can be driven to rotate to be positioned at a first position or a second position, when the rotators are at the first position, the supporting segments form first supporting surfaces for supporting the first tyre layer, and the first supporting surfaces and the attaching surface are radially located on the same circumference surface; when the rotators are at the second position, the supporting segments form annular sunken parts, a second supporting surface is formed on each annular sunken part, and the second supporting surfaces areradially lower than the attaching surface. Thus, according to the tyre forming drum provided by the invention, the rotators are driven to rotate, and the first supporting surfaces or the second supporting surfaces are alternatively provided at the supporting segments, so that requirements for a forming technology at each stage of forming of a high-quality run flat tyre are met.

Description

technical field [0001] The invention relates to the technical field of tire building equipment, in particular to a tire building drum applied to a tire building machine. Background technique [0002] Existing semi-steel radial method primary method tire building machine comprises belt tread drum and tire building drum. Wherein, the belt tread drum is used to form the tread assembly, that is, the tire components such as the belt layer, the cap band and the tread layer can be attached to the outer surface of the belt tread drum in order to form the tread assembly. The tire building drum is used to form the carcass assembly, that is, the tire components such as the PA composite layer (spliced ​​by the inner liner and the sidewall layer) and the ply can be attached to the outer surface of the tire building drum in sequence; Placed symmetrically radially outward of the carcass on the tire building drum; when the interior of the tire component inside the bead is inflated, the tir...

AI Technical Summary

Problems solved by technology

Due to the existence of the annular groove, it is impossible to form a continuous and flat cylindrical surface on the tire building drum

Therefore, after the inner liner is bonded to the outer surface of the tire building drum, the inner liner located on the radially outer side of the annular groove cannot be supported, resulting in The poor quality of end stitching will affect the quality of the tire blank

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