Finger-shaped turning down device for tyre molding machine

Abstract

The invention relates to a finger-shaped turning down device for a tyre molding machine. The finger-shaped turning down device comprises a base, a support of finger-shaped pieces, a plurality of finger-shaped pieces, an opening driving pneumatic cylinder of a plurality of finger-shaped pieces, a push tray, two overall stroke oil cylinders, a plurality of turning down oil cylinders, a buckle ring disc, a plurality of buckle ring oil cylinders and a plurality of bead supports. The finger-shaped turning down device for the tyre molding machine integrates the functions of finger-shaped turning down, a buckle ring, bladder turning up and boosting into a whole, the finger-shaped turning down device is arranged on a guide track by utilizing the base and not contacted with a main shaft, so that the finger-shaped turning down device can prevent the whole device from rotating along with the whole device and the problems of holding shaft caused by gravity reason and the like, and simultaneously reduce loads of the main shaft. In addition, the opening of the finger-shaped pieces is completed by the pneumatic cylinder with constant output thrust, the actions of the finger-shaped pieces are stable, and the replacement is more convenient; furthermore, the closing of the finger-shaped pieces is completed by driving a pressing wheel to push the finger-shaped pieces by the push tray, as the contact between the pressing wheel and the finger-shaped pieces is rolling friction, the service life of the device can be greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of rubber machinery, and in particular relates to a finger-shaped wrapping device for a giant or large engineering radial tire building machine. Background technique [0002] The finger-shaped positive wrapping device is used to put a steel ring on the outside of the two ends of the carcass ply tube made in the previous process and put on the building drum, and then wrap the two ends of the carcass ply tube on the steel wire. Production equipment on circle. Usually, a finger-shaped wrapping device is arranged on the inside and outside of the forming drum. Traditional finger wrappers are all installed on the main shaft. During the production process, under the action of the driving device in the main box, the main shaft will drive the forming drum to rotate together. But, there are following problems in this prior art finger-shaped wrapping device: 1) although the finger-shaped wrapping device is installed ...

AI Technical Summary

Problems solved by technology

But, there are following problems in this prior art finger-shaped wrapping device: 1) although the finger-shaped wrapping device is installed on the main shaft, it itself does not need to rotate together with the main shaft, but utilizes the main shaft as a guide to move along the axial direction. This will make the structure of the finger-shaped wrapping device complicated, and the load on the main shaft will be relatively large, and at the same time, the problem of holding the shaft will easily occur due to gravity.

2) The finger-shaped sheets on the finger-shaped wrapper are usually driven by torsion springs, coil springs, steel sheets and other components, and the spring force gradually increases when retracted, but the actual working conditions do not want the spring force to increase. In addition, due to the high spring force, it is extremely difficult to replace the fingers

3) The folding of the fingers is achieved by pushing the outer sleeve. During this process, there is strong sliding friction between the fingers and the outer sleeve. As a result, the contact parts between the two are severely worn, so that Will affect the service life of the equipment

4) When it is necessary to produce tires of different specifications, it is necessary to replace a full set of finger-shaped wrappers of different specifications, which will undoubtedly increase the workload and labor intensity of the operators, and the production efficiency is low

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