Mechanical forming drum and method thereof for realizing auxiliary turn-up of tire embryo slit

Abstract

According to a mechanical assembly drum assisting turn-up of tire embryo seam allowance and a method for realizing assisted turn-up provided in the invention, rubber ring structures capable of swelling when inflated are arranged at the interior and exterior side of the tire embryo seam allowance and form into capsules after inflation to realize internal and external extrusion to the part of seam allowance, thereby improving quality of turn-up and compaction of the tire embryo seam allowance. The invention enables the operation of wrapping and compacting directed to the part of seam allowance to be realized and bubbles in the interior and exterior side of the tire embryo seam allowance to be completely eradicated, thereby substantially enhancing quality of turn-up of the part of the seam allowance. The mechanical assembly drum has a hollow cylindrical main shaft and a driving shaft which drives a locking piece assembly and a finger type turning up means for reciprocating motion; a rubber ring, which is connected with a locking piece unit and forms a closed ring structure around the periphery of the main shaft, is provided on the top of a locking piece cylinder body; two ends at the exterior side of the rubber ring are respectively fixed on the interior and exterior side of the locking piece cylinder body; a breather pipeline of the locking piece cylinder body communicates with the interior of the rubber ring. When the rubber ring is inflated, internal and external capsules are formed for direct wrapping, compacting and venting of the part of the seam allowance.

Description

technical field [0001] The invention relates to a mechanical forming drum for realizing the turn-up and rolling operations of carcass components on a tire building machine, and a method for auxiliary turn-up mainly on the inner and outer sides of the tire embryo slit, belonging to the field of rubber machinery. Background technique [0002] In the manufacturing process of existing semi-steel tires and all-steel truck tires, the mechanical building drum assembled on the tire building machine is mainly used for laminating and turning up the inner liner and sidewall rubber. [0003] For example, the previous patent that discloses the content of the following scheme, patent number 03102556.0, the patent name is an automatic turn-up rolling mechanical forming drum, which mainly includes a turn-up rolling arm elastic rubber ring, a driving turn-up rolling piston assembly, and a cylinder block sleeve Cylinder, transmission shaft with positive and negative threads, hollow main trans...

AI Technical Summary

Problems solved by technology

[0007] 1. For the sealing inside the embryo and the positioning support of the traveler only rely on the locking effect of the fan-shaped block (56), it is easy to cause the embryo to leak and cause the carcass cord to be rolled incorrectly and easy to retain air bubbles;

[0008] 2. There is a lack of compaction and exhaust operations for the slit, and the quality of the turn-up operation inside and outside the slit of the embryo is poor;

[0009] 3. If the turn-up roller is directly used to compact the outside of the rim, it is more likely to appear rim indentation and affect the overall appearance of the embryo, and even introduce the phenomenon of discounting the sidewall parts, which directly leads to a decline in the quality of the embryo forming operation

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