Variable-supporting-diameter seamless forming drum

Abstract

The invention discloses a variable-supporting-diameter seamless forming drum. The variable-supporting-diameter seamless forming drum comprises a shaft sleeve, a guide disc, a guide key disc, a movablebase, a power mechanism, floating connecting rod bases, springs, guide rods, fixed connecting rod bases, large locking blocks, small locking blocks, sliding blocks, first connecting rods, second connecting rods, a limiting ring and a limiting ejector rod, wherein the shaft sleeve, the guide disc and the guide key disc are fixedly connected together; the power mechanism drives the movable base toslide along the shaft sleeve, and pushes the floating connecting rod bases and the fixed connecting rod bases to move synchronously; and the large locking blocks and the small locking blocks are driven by the connecting rods to move outwards in the radial direction of the guide key disc. When a sliding sleeve makes contact with the limiting ring, the sliding sleeve stops moving, the large lockingblocks stop moving accordingly, the movable base continues to push the fixed connecting rod bases to move, and the small locking blocks continue to move outwards till the small locking blocks and thelarge locking blocks jointly define a locking circle. Moreover, the position of the limiting ring can be adjusted by adjusting the limiting ejector rod, and locking circles with different diameters can be formed, so that locking of tire blanks with different seam allowance inner diameters is met.

Description

technical field [0001] The invention relates to the field of tire manufacturing equipment, in particular to a seamless forming drum with a variable diameter. Background technique [0002] In the tire production process, the tire embryos with the same rim size are affected by factors such as process parameters, specifications and models, and semi-part sizes, and the inner diameter of the spigot will have certain differences. Due to the structural characteristics of the existing seamless locking block technology, the propping diameter of the locking block is a fixed value. When there is a large deviation between the inner diameter of the embryonic slit and the propping diameter of the forming drum locking block, the locking block will The block cannot be propped up in place or the tire embryo is not tightly locked, which seriously affects the quality of the embryo forming. Contents of the invention [0003] The purpose of the present invention is to make up for the deficien...

AI Technical Summary

Problems solved by technology

Due to the structural characteristics of the existing seamless locking block technology, the propping diameter of the locking block is a fixed value. When there is a large deviation between the inner diameter of the embryonic slit and the propping diameter of the forming drum locking block, the locking block will The block cannot be propped up in place or the embryo hole is not tightly locked, which seriously affects the quality of the embryo forming

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