Expansion drum device for tyre retreading and tyre retreading method

Abstract

The invention relates to an expansion drum device for tyre retreading and a tyre retreading method. The expansion drum device for tyre retreading comprises a first moving mechanism, a second moving mechanism and a supporting part at the tail end of the second moving mechanism, wherein the radial motion of the second moving mechanism is driven by virtue of the axial motion of the first moving mechanism; the first moving mechanism comprises a main shaft, a tapered shaft sleeved at the main shaft, and a driving mechanism used for driving the axial motion of the tapered shaft; the second moving mechanism comprises a radial shaft matched with the inclined surface of the tapered shaft; the radial shaft is clamped between a left tray and a right flange plate. The driving mechanism is used for driving the tapered shaft to move forward and backward in the axial direction, so that the radial shaft with the inclined surface at the lower end is driven to extend out at the same time, and therefore, self centering of a tyre is realized; the expansion drum device is simple in structure; a gas passage structure adopted by the expansion drum device is relatively simple, so that winding of a gas pipe caused by the rotation of an expansion drum is avoided, and the expansion drum device is safe and reliable and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of tire retreading, and in particular relates to an expansion drum device for tire retreading and a tire retreading method. Background technique [0002] The refurbishment and reuse of waste tires is the main way to recycle tire resources, and it is also the main measure to reduce waste tires. Tire retreading is to replace the worn and damaged part with a new rubber combination, so that the damaged tire is called a complete tire. However, there are a series of problems in the retreading process, such as: the diameter of the bead of the tire in contact with the chuck is not exactly equal to the diameter of the outer chuck, and even if they are all car tires, different brands of tires produced by different manufacturers are also different. There will be a difference, which will cause a gap between the tire mouth and the chuck during installation, making the center of the tire and the center of the chuck eccen...

AI Technical Summary

Problems solved by technology

For example, Chinese patent literature discloses a shaping device and method of a tread laminating machine [Application No.: CN200810138001.7]. The invention imposes centripetal constraints and The reset force avoids the dislocation and locking of the sector blocks, solves the problem of overall disassembly and replacement of the forming drum, and improves the pneumatic transmission between the internal structures, but the structure is relatively complicated. The expansion drum is expanded outwards by compressing the gas. Need to ensure good sealing

Images