Axial and radial stretching type tire molding drum

Abstract

The invention discloses an axial and radial stretching type tire molding drum which comprises an inner tile, an inner tile driving mechanism, an outer tile and an outer tile driving mechanism, wherein two axial ends of the inner tile and the outer tile are respectively provided with a drum shoulder capable of doing stretching motions along the axial direction thereof; the inner tile driving mechanism comprises a hollow spindle, a screw rod, a sliding seat and a connecting rod mechanism, and the connecting rod mechanism is used for realizing the stretching motions of the inner tile along the radial direction and the inner tile shoulder drum along the axial direction; the outer tile driving mechanism consists of two groups of space connecting rod mechanisms which are axially symmetrical relative to the outer tile and is used for realizing the stretching motions of the outer tile along the radial direction and the outer tile shoulder drum along the axial direction; the space connecting rod mechanism is formed by hinging a first group of rod pieces and a second group of rod pieces; the motion planes of the second group of rod pieces are all superposed with the radial symmetrical planeof the outer tile; and the motion planes of the first group of rod pieces are all vertical to the motion planes of the second group of rod pieces. The molding drum can be used for realizing axial andradial stretching, is suitable for molding aviation radial tires and has the characteristics of light weight, compact structure and convenience for tire disassembly.

Description

technical field [0001] The invention relates to a tire building technology, in particular to a tire building drum. Background technique [0002] At present, the drum folding methods of tire building drums include inertial drum folding and mechanical drum folding. Inertial drum folding has simple structure and convenient drum folding, but it has high impact force, short service life and low degree of automation. The mechanical folding drum is driven by the relative rubbing spindle and the brake sleeve, cylinder or hydraulic cylinder, which is convenient to control and stretches continuously, but it needs to add auxiliary equipment, the structure is complicated, the impact wear is large, and the equipment maintenance rate is high. In the mechanical drum folding method, for example, when the forming drum is folded, the large drum tiles are first supported outward, which is easy to damage the steel wires in the longitudinal and weft directions of the tire; Interference, techni...

AI Technical Summary

Problems solved by technology

In this kind of building drum, the movement of the inner tile and the outer tile is caused by the same guide rod driving two sets of connecting rods (small connecting rod, large connecting rod). The acceleration of the tile) is always greater than that of the other group of tiles (outer tiles), resulting in a larger space between the two sets of tiles after shrinkage, and the shrinkage mechanism is not compact enough to meet the production requirements.

The above-mentioned mechanism does not have a drum shoulder telescopic mechanism, so the axial telescopic expansion of the drum tile cannot be realized, and the accuracy and quality cannot be well guaranteed during the tire building and tire unloading process.

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