Device for producing bead cores for tyres by crimping a braided wire, with optical tracking of the cutting and crimping point

Abstract

The invention relates to a device (1) for producing an annular bead core element (2) intended to reinforce a pneumatic tyre, with a splicing station (10) which is designed firstly to receive a braided torus (3) with a central axis (Z3) comprising a braid wire (4), which extends in a longitudinal direction from a first end section (5) to a second end section (6), and which is interwoven in helical coils (7), and secondly to bring the first end section (5) and the second end section (6) together and attach them to each other, the device comprising a positioning system (20) which allows automatic adjustment of the position of the braided torus relative to the splicing station and which comprises a drive unit (30) for this purpose to move the braided torus (3) relative to the splicing station (10), a spacer unit (40) to make the first and second end sections (5, 6) project, by means of elastic deformation, relative to the body of the braided torus (3A), and an end section sensor (60) to detect the passage of the end section (5, 6) projecting into a tracking point (O60).

Description

technical field [0001] The present invention relates to the field of manufacture of reinforcing bead cores intended to reinforce tires, in particular pneumatic tires, to hold such tires on the rim. Background technique [0002] In a known manner, the bead core is an annular element made of rigid material, usually metal, which may be a wire made of a plurality of interwoven strands. [0003] Therefore, when manufacturing a bead core wire, it is known to provide a braiding step in which the braiding wire is wound in a helical coil around a core wire which itself is closed in a loop, to form a braided annular body, after which the braiding wire is wound using, for example, a press A nipple secures the ends of the braided wires together to provide a cohesive braided annular body in the form of an annular element forming the bead core. [0004] For this purpose, a cutting operation is required to adjust the length of the end of the braided wire, after which the crimping sleeve i...

AI Technical Summary

Problems solved by technology

[0005]These operations are sometimes delicate, which makes them relatively slow and difficult to replicate from one bead core to the next

[0006] In addition, the sleeve may not be properly positioned on the end of the braided wire, which can lead to scrapping of the bead core wire and consequent raw material and energy waste of

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