Non-capsule two-stage tyre setting drum

Abstract

The invention relates to a non-capsule two-stage tyre setting drum, comprising a left side drum and a right side drum which are respectively provided with a cylinder power plant and a shrink ring, wherein the shrink rings at two side are arranged in an eudipleural manner, and a bead clamp toe opening is arranged on the periphery of each shrink ring and is an annular groove; and the shrink ring comprising multiple large sector blocks and small sector blocks which are arranged alternatively and successively and have the same amount of blocks, sector blocks are respectively connected with a slider fixedly, the slider is connected with a connecting rod connected with a shifting ring, the contact surface of the large sector block and the small sector block is provided with sealing fins which are pasted and fixed on reserved grooves on the small sector blocks, and the thickness of the sealing fin is slightly larger than the depth of the groove. In the invention, a capsule type tyre setting drum is changed into the non-capsule two-stage tyre setting drum, thus realizing tyre positioning and setting under a full mechanical proper circle state, saving capsule manufacturing expense and use cost, improving precision and quality of tyre contour machining, and especially being suitable for moulding of high performance saloon car tyres.

Description

technical field [0001] The invention relates to a tire molding machine, in particular to a capsule-free two-stage tire shaping drum used for manufacturing car radial tires. Background technique [0002] The structure of the prior art tire shaping drum (i.e. capsule two-stage tire shaping drum) is as follows: figure 1 As shown, it consists of two parts, the left drum and the right drum. The left drum and the right drum are respectively installed and connected to the telescopic shaft of the molding machine through bushings. The left drum and the right drum are equipped with air cylinders. The power unit and the contraction ring, the contraction ring is generally left-right symmetrically arranged, the contraction ring is composed of a large fan-shaped block (04) and a small fan-shaped block (07) which are equal in number and alternate in sequence, and the large fan-shaped block and the small fan-shaped block are respectively connected to The corresponding slider is fixedly con...

AI Technical Summary

Problems solved by technology

The above-mentioned capsule type tire shaping drum has the following disadvantages: (1) when the molding machine is working, under the action of the moving parts of the cylinder power unit, the shrinkage ring becomes an umbrella shape and opens or shrinks, and the shrinkage ring is opened and closed every time. Therefore, the sealing capsule is easy to be damaged, thereby increasing the manufacturing cost and the use cost; (2) Since the sealing capsule is an elastic part, when the tire tire is processed and molded, the tire tire After the steel ring passes through the sealing capsule, it is clamped on the toe of the shrink ring, which affects the precision and quality of the tire molding process.

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