CS268975B1 - Tire skeleton - Google Patents

Abstract

The carcass is formed by at least one textile insert having warp and weft fibers connected by twill or satin weave, placed relative to the circumferential axis of the casing at an angle α< in the range from 30° to 50°.

Description

(57) The skeleton le consists of at least one textile lining comprising weft and weft fibers joined by twill or satin weave, placed at an angle of v within the range of 30 ° to 50 ° with respect to the circumferential axis of the sheath.

CS 268975 Bl

FIG

CS 268975 Bl

The invention relates to a tire carcass, in particular a tubular carcass structure.

Until now, the individual tubular carcass inserts have been fabricated from a textile material that consisted only of warp fibers arranged close to each other. The function of the weft, that is, to keep the warp fibers in the desired configuration and shape, was replaced by a rubber compound layer that connects the individual warp threads and keeps them at the desired spacing. the production of such a skeleton of tubus, made up of warp threads, is laborious. This is done by winding individual fibers onto a cylinder of appropriate diameter, followed by rubbing the thus formed carcass with a rubber compound solution, after drying followed by trimming the rubberized textile carcass from the cylinder at the desired angle. All of the above operations place considerable demands on operator precision and low productivity. Another construction material suitable for the manufacture of a tubular carcass is a plain weave fabric that is cut to the required width of the insert at a certain angle. The disadvantage of this fabric is the low tear or defect resistance of the skeleton thus formed, especially when the tubing is inflated to a higher pressure (above 750 kPa).

The above drawbacks are at least partially eliminated by the carcass of the tire, in particular the tubing, formed by at least one woven textile insert, when the carcass in the inflated condition has a ratio (D _k ): 0.318 (L) 1.2 where (D ^) denotes the crown diameter of the inflated tubing on the rim and (L) denotes the length of the tubular carcass skeleton, according to the invention, wherein the textile insert having warp and weft fibers joined by twill or satin weave is disposed at an angle (<<) of 30 ° to 50 relative to the circumferential axis °.

The design of the sleeve according to the invention greatly reduces the labor intensity of its manufacture while increasing labor productivity. There is also an increase in the service life of tubular tubes in practical operation. Compared with the structure of the skeleton with plain weave, the skeletal puncture resistance when overcoming obstacles and the tear resistance of the skeleton increases when the skeleton is damaged and beyond normal skeleton inflation, ie above 1000 kPa. This carcass resistance to carcass puncture and further tear was confirmed by laboratory tests of the tear resistance of the carcass material, using fabric samples of the same material and assembly that were rubberized, the sample width was 100 mm and the fabric was clamped into jaws cut in the warp or on the weft. For the linen weave sample, the average tear resistance values for the warp yarns were 17 N and for the weft yarns 16 N. II the twill weave samples of the fabric liner were the average tear resistance of the warp yarns 64 N and the weft yarns 62 N.

In the accompanying drawing, Figure 1 shows a portion of the skeleton insert with twill weave, and Figure 2 shows a portion of the skeleton insert with satin weave.

In Figure 1, the warp threads of the twill wedge liner are positioned at an angle α of the circumferential axis. 45 ° and in Figure 2 the warp threads of the satin-bonded insert are positioned at an angle of »45 ° to the circumferential axis 7. The tubular carcass insert has a ratio of: 0.318 L »1.06 in both cases. Both twill weave and satin weave It is made by cutting textile with a warp of 23 threads / cm and a weft thread of 22 threads / cm at an angle of 45 ° C.

The tire carcasses according to the invention can be used with all bicycle tire types.

Claims (1)

SUBJECT OF THE INVENTION The carcass of a tire, in particular a tire, comprising at least one woven textile insert, wherein the carcass when inflated has a ratio (D _k ): 0.318 (L) <1.2 and (0 _fc ) denotes the crown diameter of the inflated tire on the rim and (l) tubular carcass length characterized in that the textile insert (2) having warp threads (3) and weft threads (4) connected by twill or satin weave is disposed at an angle (X.) with respect to the circumferential axis (i) of the sheath. from 30 ° to 50 °.