摘要:
A method & apparatus for determining carbon black in rubber composites (e.g. for tyres) based on time-resolved laser breakdown spectroscopy (TREUBS) are described. A laser beam (4a) is raster scanned across the sample surface (1a), and atomic or molecular emission from the laser excited plasma (4c) is collected from measuring points (4b), spectrally dispersed by grating (11) and detected using the photodiode array (12). To determine the carbon black distribution, spectral line intensity ratios relative to carbon acting as internal standard, for elements present in the sample are measured at two different delay times after the exciting laser pulse. At short delay times
摘要:
The invention concerns a tyre for vehicles wheels and specifically a tyre of the so-called "all season" type, capable of assuring the best performance in any running, weather and road condition. The tyre of this invention presents a tread band (1) axially divided into two circumferential portions of different width, distinguished for the type of compound and tread pattern, wherein one of the two portions, that (11) of greater width, constituted by a compound and presenting a pattern especially suitable for wintry uses, embeds anti-skid granules (2) of high resistance, ceramic or metal-ceramic materials, whose volume quantity is comprised between 8% and 15% with respect to the volume of the corresponding compound portion.
摘要:
The invention relates to high-performance tyres provided with self-supporting capability, that is capable of running at high speed and for rather long periods even if they are completely deflated. The tyre is comprised of a lenticular section member (9) made of elastomeric material of average hardness, disposed at the inside of the tyre side and incorporating a textile reinforcement insert (10) provided with cords oriented towards a substantially radial direction and extending radially from the side centre line as far as under the end of the belt.
摘要:
The described device comprises two primary pliers systems (2, 2a) arranged to engage through respective gripping elements (25, 26) the opposite ends of an elastomeric filler (45) applied on the bead core (46). The pliers systems are pivoted around an axis a little far, toward the center of the bead core, with respect to the convergence point of the V-shaped opening formed by the ends of the fillers and are angularly mobile to draw near and to splice the ends themselves. It is provided that on carrying out their movement, the pliers systems rotate the one with respect to the other according to an angulation greater than the value of the angle formed by the ends of the filler and that the gripping means (25, 26) are shaped in such a way that in a circumferential outer zone of the filler, the ends are oriented according to offset planes to mutually get near during the action of the pliers systems. An ancillary pliers system (24) compresses laterally the approached ends to effect the final splicing.
摘要:
The invention relates to a breaker belt structure to be used in pneumatic tires, in particular in those of the radial carcass type. The structure comprises a radially outer strip of circumferentially arranged cords (61), preferably but not exclusively made of textile material, as polyamide or aromatic polyamide, and two felted layers (62), (63), situated in a radially inner position, which comprise an elastomeric or plastomeric supporting material and a reinforcing filler of aramide pulp oriented along a preferred direction which is inclined with respect to the circumferential direction, the preferred directions of orientation in the two felted layers being preferably inclined symmetrically to each other at an angle of 45° with respect to said circumferential direction.
摘要:
This invention concerns a tire especially for motorcycles, having a textile carcass that comprises at least one pair of cord plies. Each ply has a plurality of cords. The cords are parallel to each other, crossed with those of the adjacent plies and are symmetrically inclined with respect to the circumferential direction, preferably at an angle between 50 DEG and 65 DEG to the midcircumferential plane, measured on the tire crown zone. The tire also has an annular reinforcing structure between the carcass and the tread, comprising at least one pair of textile cord strips, the cords of said strips being crossed with each other and symmetrically inclined with respect to the circumferential direction, at an angle comprised between 18 DEG and 25 DEG , measured also on the crown of the tire.
摘要:
The invention concerns a tyre, especially suited for motorcycles, that is capable of high performances during racing competitions, due to the high rigidity of the tyre sidewall which permits considerable increases in speed in cornering. The said tyre presents, in correspondence of the radially inner portion of the sidewall and in a straight section, the profile of the carcass plies and of the axially inner surface, concave inwardly, together with the profile of the axially outer surface, concave outwardly.
摘要:
The invention concerns a metal wire, used to produce reinforcing elements for articles of elastomeric material, which is provided with a coating able to ensure at the same time a good resistance to corrosion, good values of initial adhesion and a low decay, due to ageing, of the bond with the elastomeric material, said coating being formed by two concentric layers of a Zn/Ni alloy, where the radially inner layer contains Zn in an amount ranging between 60% and 90% on the layer total and the radially outer layer contains Ni in an amount ranging between 60% and 80% on the layer total.
摘要:
There is described here a tyre-vulcanizing press, comprising a frame provided with a lower supporting plate (1) - apt for allowing a mould (2) for vulcanizing said tyres to rest upon it, and an upper plate (6) that is mobile with respect to said lower plate, said mould comprising a lower cheek (15), an upper cheek (16) that is mobile with respect to said lower cheek, and a series of sectors (17) that are mobile with respect to an annular containing-element, each of which is radially mobile with respect to said upper cheek; the said mould comprising connecting-means apt for fixing said lower cheek to said lower plate, and said upper cheek and said annular element to the said upper mobile cheek, and which comprise a series of rotating bodies (26, 27, 28) on said lower and upper plates - which are actionable from the outer side of said plates with respect to said mould.