Method and installation for inclusion of solid granules in the tyre tread
(57) Abstract:The invention relates to a method and installation for inclusion of solid granules in the tyre tread, and in some rubber bands and a workpiece protector. Rubber blank is extruded in an extruder with obtaining protective strips of the required forms, which are under the control of the continuously rolled several layers of a certain thickness on the preprocessed bus or other material (subject). Then they give emphasis with the formation of the corresponding figure and are vulcanized. A distinctive feature of the invention is that the solid granules are distributed (applied) in accordance with a given configuration, at least part of the surface of the extruded rubber tread strip before rolling the next layer on the pretreated bus using for a specified distribution of granules device so that the granules after profiling and vulcanization were included in the fitting, i.e., a figure, wearing the tread surface of the tire. The result is improved stability of the vehicle on slippery roads. 3 S. and 8 C.p. f-crystals, 8 ill. Izobreteniya tape and the workpiece protector, through which the rubber blank is extruded with obtaining protective strips of the required form, which several layers of a certain thickness is continuously under control, rolled around pretreated tires or other material (subject), and then give emphasis with the formation of the corresponding figure and are vulcanized.Bus vehicles are, generally speaking, from fiber reinforced frame (provided with wire or rope), which forms the inner layer of the tire, and an outer wear layer, which is made of vulcanized rubber or similar material, and which profiles to obtain the desired picture above by reinforced tire carcass.Tires are manufactured in accordance with the above-described steps, and the restoration of their protectors is also a known process. When the shape of the outer surface (the protector) is worn so that it ceases to perform its function, the rest of this outer surface is polished and specified on the tire carcass put a new protector. One method of retreading is continuous coating frame Aniem new drawing and vulcanizer.The role of the outer layer of the tire is the formation of stable and wear-resistant surface with respect to the road surface on which the vehicle is moving. There are many ways of increasing the wear resistance of the tire and reduce slipping of vehicles on slippery surfaces such as ice or snow. Special mention should be made of thorns, closed up in a bus after their manufacture in a known manner, and anti-skid chains.The premise of the invention.In recent years and decades have been proposed ideas related to the inclusion and/or consolidation of different types of materials in or on the wearing surface of the tire.Known methods include solid granules in the tyre tread to increase its stability on slippery surfaces, especially on snow and ice. In U.S. patent N 2672910, issued in 1948, described the manufacture of tires, where the crude rubber used for its production, mixed with coated carbide granules. Superior grip with rubber granules is achieved by coating.In addition, they developed methods of recovery of the tyre tread. To prepare worn tires to roll on nm Germany DE 4025459 A1, referring generally to the recovery of tires used tires, a new layer of rubber wrapped around the bar, after which he was profiled with obtaining the desired figure.In addition, in European patent applications EP 0454025 A1 and EP 442155 A1 describes methods for the production of tyres and/or repair of tires, in accordance with which the raw rubber before extrusion and knurling on the preprocessed bus, was mixed into coated carbide granules.In the above-mentioned patents describe methods and installations for the manufacture of treads and tires. They describe the inclusion of solid granules in the tread of the tire to increase the wear resistance of the tire and reduce slipping of the vehicle on ice or snow.None of the mentioned methods or setting to enable solid granules have not received wide acceptance because of their deficiencies, which occur when they are used in the production process. The drawback of these methods lies in the cost of production in the implementation of the inclusion of solid granules in the rubber due to the significant depreciation of the equipment.If the solid granules are mixed with a whole lot of raw material, that is, the I solid granules in the outer wear surface of the tire, what should also be considered as a drawback.Another disadvantage is the insufficient adhesion between the reinforced fiber frame and provided with beads protector, because the granules show a tendency to weaken the adhesion between the carcass and the tread, i.e. the outer wear surface of the tire. In addition, it is believed that the granules mixed into the whole mass of rubber material, reduce the elasticity of the tire carcass.Disclosure of the invention.The aim of the invention is the provision of a method and installation, which, however, is simple in implementation and manufacture, efficient in operation, and which also allow you to control the inclusion of solid granules and their location in the outer wearing surface of the tire. One of the main advantages of the method on which the bid is submitted, is that it does not allow for additional work on the restoration of the tyre tread.The manufacture of tyres and treads with an admixture of solid granules provides the following benefits:
- increased stability of the vehicle on slippery surfaces;
- reduced wear on dorogaya the case of the use of tyres with spikes and anti-skid chain.These characteristics are confirmed by tests conducted by the office of Sweden VTI (Swedish Public Roads Administration and the office BAST Germany (German Public Roads Administration or Bundesanstalt lur Stasserwesen).These advantages are achieved by implementing a distinctive characteristic of the invention, which consists in placing solid granules on at least part of the surface of extruded rubber tread strip in accordance with a given configuration before rolling the next layer in a circle on the preprocessed bus using a special device so that the granules were included in shapes having the desired pattern, the tread surface of the tire after profiling and vulcanization.Another aspect of the invention is that the solid granules are placed in accordance with a given configuration, at least part of the surface of extruded rubber tread strip, which ensures the control of a segment of the tread strip, the coated solid granules, and also distribution of granules in given areas shaped and vulcanized tires.Another hallmark izobreteniya bands distributed from 0.01 to 0.1 gram of solid granules, where the diameter of each pellet is 1 to 3 mm, in particular 1.5 to 2.0 mmIn addition, a distinctive feature of the invention is that the solid granules are distributed in accordance with a given configuration on the surface of extruded rubber tread strip, which after its knurling on the pretreated surface of the tire casing forms the outer surface of vulcanized and shaped bus, and in that the device for applying granules have after the extruder and on extruded rubber tread strip and the front of the bus, and in that the granules are applied to the specified tread strip in front of her knurling on the bus.A device for applying granules is unique because it consists of a hopper-type funnel, which serves before applying solid granules, and feeder (rotating, rubber coated cylinder), which delivers the required amount of granules from the hopper into the guide element, controlling their supply rubber tread strip, and a distribution device (specified by the guide element, can be adjusted to control the direction and the tion and speed of the strip, moreover, the number of granules, supplied and applied from the hopper is regulated by a slide feeder and speed of rotation of the cylinder, which ensures the location of the granules on the tread strip to the required density.Much work has been carried out to study the characteristics of the tires made above in a new way. Very thorough tests conducted by the traffic office BAST, Germany, has convincingly shown that the wear of the road surface caused by tyres with solid granules, more wear and tear caused by winter tyres, but significantly less than the average road wear caused by the 9 types of tyres with spikes. Tests BAST showed that, if the road wear caused by tyres with spikes, to take over 100% as a reference point, the road wear caused by the mentioned tires with solid granules, is 7%, and the wear from "winter tires" - 2%.Tests conducted by the Swedish road authority (see above) , linköping, showed that tires with solid pellets have a much greater stability (adhesion) on slippery roads than the same type of tires without solid granules. Tests also showed that tires with solid granules have, in General, better stability, i.e., the adhesion of the EIT, for example, the bends in the road and in cases where antihormone system prevents the complete locking of the wheels.In all likelihood, many types of solid granules can be used for inclusion in the tyre tread. Tests were carried out on the use of pellets SIC (silicon carbide, i.e., "silicon carbide"), and Al2O3(aluminum oxide), which have been coated with known binders and/or adhesives.A brief description of the drawings.The invention is described in more detail below with reference to the attached drawings figures, where:
Fig. 1 is a side view of an installation for the recovery of the tyre tread and to enable solid granules in the tread;
Fig. 2 is a top view of the installation for the recovery of the tyre tread and to enable solid granules in the tread;
Fig. 3 - elements of a device for the application and distribution of solid pellets protectors;
Fig. 4A and 4b are fragments of the guide element, which controls the supply of solid granules rubber tread strip;
Fig. 5 - section tyres with solid granules in the extreme outer layer of the tread;
Fig. 6 is a top view of a tread pattern in accordance with Fig. 5;
Fig. 7 is a partial illustration of processtrace roll rubber tread strip (6) on the bus, and the image location of solid granules (25) between the layers of rubber tread strip.In Fig. 1 and 2 shows a known device used for the formation of the tyre tread. In Fig.1 shows a side view of the installation, and Fig. 2 its top view. Installation can be additionally equipped with a device for mixing solid granules in the tyre tread. The unit consists of extruder (2), which produces a thin elastic rubber band (6) of rubber of the workpiece (5). In the extruder (2) of the workpiece (5) extends in a thick band (4), which is processed here and extruded through a forming head (3) of the extruder in the form of a relatively thin rubber tread strip (6). Strip (6) extending from the head (3), extends above and below the control rollers (16) and then again over and under second pair of control rollers (15) up until it ultimately will not nakataya on pretreated bus (9, 17). Part of a roll profile (15), alternatively, may be collected from a number of thin disks, similar to the pressure roller (8), which presses the rubber tread strip (6) to the bus. The tire is attached to the device, which, on the one hand, it rotates around an axis (11), and the vertical axis, thereby shifting the alignment of pre-processed tires about the rolling device (13). This provides the possibility of rolling strip (6) layers, which overlap overlap, covering the entire bus (see POS. 13), as wrapping around her. Between the extruder (2) and bus (9) the device (1) designed to enable solid granules in the tread strip and/or for applying them on the bar. The device (1) is attached to the lever (14), which comes out of the extruder (2), which supports some of the rolls (15) and pressure roller (8). Of course, this device can be placed separately. Its function is to distribute the solid granules on the tread band before knurling on the bus or at an appropriate stage before rolling the next layer of the tread band on top of the previous layer (see Fig. 7 and 8).In Fig. 3 shows the device (1), the function of which is the inclusion of solid pellets in a rubber tread strip (6) or the application of granules on it. The device (1) consists of a hopper (20) with a funnel, which serves granules prior to their distribution and feeder (21, 22), which provides a supply of a controlled quantity of granules from the hopper bunno under the funnel (20), and who picks up the bottom of the granules leaving the funnel under the flap (21) or similar metering device. The cylinder moves the pellets prior to their fall in the control guide element (7) which is curved in the direction of the tread strip (6), and then into the distribution head (23) located on the end of the element (7), which ensures the application of solid granules on the strip (6).In Fig. 4A and 4b shows the details of the application of granules to the tread strip (6). This band is moving in the direction of the arrow (36), while at her from the distribution head (23) of the element (7) is applied granules (25), and they come out of the head (23) at a rate that, as far as possible, accurately synchronized with the speed of the tape (6). The size (width) and the accuracy of the position of the distribution head (23) provide controlled application of granules to the area (37) of the strip (6) or over the entire band.In Fig. 5 shows a cross-section of vulcanized and shaped with a corresponding pattern tires (35) and the location of solid granules (25) protector (27) bus. The pellets are sealed at the outer part (28) of the tread.In Fig. 6 shows how the granules (25) are arranged on the figure is a circle layers (6', 6", 6"') on the pre-processed frame (26) of the tire. Depending on the method of continuous rolling tread strip in a circle on the bus each layer of strips partially overlap overlap the next layer.In Fig. 8 shows the details of the rolling rubber tread strip (18), where each layer partially overlaps overlap(6', 6", 6"', 6"") layer the following, as well as the location of the deposited solid granules between the layers of the tread strip(25', 25"...).The above invention is not limited precisely to these details of its embodiment and can be modified in many ways without deviating from its main concept. 1. The method of inclusion of solid granules in the tyre tread and in some rubber bands and protectors, in accordance with which the rubber blank is extruded with obtaining protective strips (6) of the required form, which several layers of a certain thickness rolled under control around pretreated bus (9) or other material, and which are then concerned with obtaining the appropriate picture and are vulcanized, characterized in that the solid granules (25) are distributed according to a given configuration is attorney stripes on pretreated bus (9) with the use intended for the specified distribution of the granules of the device (1) thus, to the granules (25) were included in the fitting, i.e., a figure, wearing surface (35) of the tire tread after profiling and vulcanization.2. The method of inclusion of solid granules in the tyre tread under item 1, characterized in that the solid granules (25) are distributed according to a given configuration, at least part of the surface (37) co-extruded rubber tread strip (6), which allows you to control a segment of the tread strip, coated carbide granules, and also to control the distribution of granules in given areas wearing surface shaped and vulcanized tread.3. The method of inclusion of solid granules in the tyre tread under item 1 or 2, characterized in that on one square centimeter of rubber tread strip, the coated solid granules, distributed between 0.01 and 0.1 g of solid granules.4. The method of inclusion of solid granules in the tyre tread according to any one of paragraphs.1-3, characterized in that the diameter of each pellet is 1-3 mm and, in particular, 1,5-2,0 mm5. The method of inclusion of solid granules in the tyre tread according to any one of paragraphs.1-4, characterized in that the solid granules are distributed according to the weight of the roll on the frame pretreated bus forms the outermost layer (28) formed i.e., formed with a corresponding picture, and vulcanized tread.6. Installation to include solid granules in the tyre tread and some rubber bands and protectors, through which the rubber material (4) extruded in the extruder (2) with obtaining protective strips (6), with several layers of a certain thickness controlled rolled the pretreated bus (9) or other material, and which are then concerned with with the formation of the corresponding figure and are vulcanized, and where the tread strip is rolled on the frame, a rotatable tire, characterized in that it, in the process of manufacturing a product, the device (1) distribution of the granules are placed after the extruder (2) and over the rubber tread strip (6), extrudable from the extruder (2).7. Installation to include solid granules in the tyre tread on p. 6, characterized in that it, in the process of manufacturing a product, the device (1) is located after the extruder (2) front tires (9) and before the rubber tread strip, rolled on the bus.8. Installation to include solid granules in the tyre tread on any of the p. 6 or 7, characterized in that the device is decomposing the cylinder and valve 21, 22), which ensures delivery of the required number of pellets from the hopper into the guide element (7, 23) to implement the controlled application of granules to the surface of the rubber tread strip (6).9. Installation to include solid granules in the tyre tread according to any one of paragraphs.6, 7 or 8, characterized in that the distribution unit, i.e., the guide element (7, 23), can be adjusted so that the direction and speed of applying granules to the surface of the rubber tread strips were, as far as possible, accurately aligned with the direction and speed of movement of the tread strip to provide, thereby, control the distribution of granules (25) on the tread strip (6).10. Installation to include solid granules in the tyre tread according to any one of paragraphs. 6-9, characterized in that the rotating cylinder (22) has a surface covered with rubber, to ensure the supply and distribution of pellets, coming at it from the funnel (20) under the flap (21).11. Tires with solid granules produced by the method and installation according to any one of paragraphs.1-10.
FIELD: process engineering.
SUBSTANCE: proposed method comprises the stage of winding whereat rubber belt is coiled with partial superimposition onto cylindrical body surface to form tire rubber element whereon rubber belt if wound with partial superimposition. Note here that said rubber belt is simultaneously shifted axially from one side to the other. Multiple air discharge grooves are formed between superimposing rubber belts on at least one rubber belt surfaces. Each aforesaid groove runs at θ varying from 20° to 90° with respect to rubber belt lengthwise direction. Air discharge groove maximum varies from 0.3 to 3.0 mm, while groove maximum depth varies from 0.1 to 3.0 mm. Air tire is produced from raw tire using rubber element for tire produced in compliance with patented method, subjected to curing and forming.
EFFECT: forming rubber element by winding of belts.
9 cl, 23 dwg, 3 tbl
FIELD: automobile industry.
SUBSTANCE: this invention covers automobile tire tread design. A pneumatic tire includes a tread rubber consisting of the layers; each layer is modeled by overlapped reeling of a rubber tape. This rubber tape contains a conducting portion in each layer in longitudinal direction and least conducting portion, where conducting portion is reeled on the tire at least once. In the most outer radial layer the conducting portion protrudes the tread for the overall axial length of at least 1.00 mm. In the most inner radial layer the conducting portion protrudes the radial outer surface, so that to be electrically connected to the conducting below structure at the overall axial length of at least 1.00 mm. Between radially adjacent layers the conducting portion of the outer layer is interlocked with the conducting portion of the radially inner layer at the overall axial length of at least 1.00 mm. The rubber tape shall be preferably made of a mixture enriched by silicon dioxide.
EFFECT: improvement of adhesion between the spins for enhancement of tread service life.
10 cl, 15 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to tire production. Proposed method comprises producing uncured tire in making tread rubber by pile winding of crude rubber band and curing of uncured tire in mould. Mould has ledges to form tread grooves in tread rubber. Ledge is arranged radially outside of crude rubber band winding edge to make tread rubber of uncured tire in said mould. In curing of uncured tire in mould, said edge is pressed inside tire by one of ledges.
EFFECT: higher uniformity of tire.
15 cl, 11 dwg, 1 tbl
FIELD: process engineering.
SUBSTANCE: invention relates to making tire rubber element and to method of making air tire. Proposed method comprises attaching first end section of rubber band to cylindrical object. Then, rubber band is coiled onto cylindrical object. Then, second end section of rubber band is secured on to coiled rubber band produced at coiling step. Note here that end surfaces of said first and second end sections have front end edge extending horizontally over band width. Then, said end sections are clamped by band cutter. Note here that cutter clamping section is composed of round column with axis extending in parallel with cutter cutting edge and has clamping surface inclined to extend upward from cutting edge base. Rubber band is cute so that clamping surface clamps ends of band sections being cut to form inclined surface on every band every end. Note here that inclined surface angle Θ in cross-section perpendicular to front end edge varies from 10 to 80 degrees relative to rubber band surface.
EFFECT: higher uniformity of tire, ruled out forming defects.
4 cl, 28 dwg, 2 tbl
SUBSTANCE: invention relates to design of pneumatic tire capable to discharge static electricity of vehicle to road surface. Tread rubber (2G) includes undertread layer (9) located radially inside so that this layer goes continuously from one tread edge (el) to another tread edge (e2) and made of nonconductive rubber, running path (10) made of nonconductive rubber and located radially outside from undertread layer (9) with tread (2a) formation, and conducting part (11) made of conducting rubber and having one end coming out on tread (2a) and another end connected with rubber (3G) of sidewall electrically connected with rim when the rim is installed. Running path (10) includes the first part (10A) of running path and the second part (10B) of running path obtained by division in vertical direction. Conducting part (11) goes from tread (2a) radially inwards between the first part (10A) of running path and the second part (10B) of running path, and the second part (10B) of running path before connecting with sidewall rubber (3G).
EFFECT: better vehicle static electricity discharge to road surface without decrease of rolling resistance and tire uniformity.
26 cl, 26 dwg, 3 tbl
SUBSTANCE: tread rubber has subtread rubber composed by first non-electro conducting rubber band, running surface rubber composed by helical winding of second non-electro conducting rubber band and conducting area extending through subtread rubber and running surface rubber in radial direction. Conducting area consists of two sections. First conducting section consists of the first conducting rubber band wound inside subtread ply rubber so that it is applied on first non-electro conducting rubber band. Second conducting section consists of the second conducting rubber band wound inside subtread ply rubber so that it is applied on second non-electro conducting rubber band. Exposed surface area composed by radially top end of the first conducting section and exposed surface area formed by radially bottom end of said second conducting section are inclined in different directions relative to tire lengthwise direction to intersect.
EFFECT: higher reliability of tire conductance.
5 cl, 11 dwg, 2 tbl
SUBSTANCE: tread rubber 2G comprises: subtread ply 9 consisting of non-electro conducting rubber including silicon dioxide in width equal, in fact, to that of cords ply 7 reinforcing the tread. It includes conducting area 11 consisting of conducting rubber extending axial to cover subtread ply outer surface and including opposite ends 11a, 11b extending outward from subtread ply 9 and connected with tire elements Ty electrically connected with rim J with tire fitted thereon. Tire tread 10 consists of non-electro conducting rubber including silicon dioxide and arranged outside said conducting area 10 to make the major contact surface area 2a. Conducting area 10 is bent to extend outward in tire radial direction. Conducting area outer surface 11A extends to contact surface 2a. Tire tread 10 includes first part 10A arranged at one side of conducting area outer surface 11A in tire axial direction and second part 10B located at opposite side of outer surface 11A.
EFFECT: lower rolling resistance, better homogeneity and conductance.
11 cl, 16 dwg, 1 tbl
SUBSTANCE: tire is made with a ring reinforcing layer formed by rubber strips wound along the spiral in the same direction from different places arranged in the direction along tire width. Rubber strips (12A and 12 B) are arranged with clearances on the part of the tire or along the entire tire in direction along width. Together with end sections of rubber strips, at least the middle end sections (12Bs and 12Ae), located on the side of the equatorial plane of the tire, are located in areas, where the middle end sections are fully covered with the units (2a) of the tread in the form of a rib in direction along tire width, and width of tread units in the form of a rib covered with the middle end sections is defined as W, and the width of rubber strips is defined as G (mm), at the same time the ratio G<W is met.
EFFECT: reduced frequency of cracks in grooves in all tires, which contain a circular reinforcing later wound along spiral.
7 cl, 2 dwg, 1 tbl
FIELD: automotive industry.
SUBSTANCE: proposed tire has V-shaped grooves of tread with top pointed forwards, with interval up to 50 mm and greater, and width and depth up to 20 mm depending on mass of vehicle (bus, truck, aircraft). Tire is provided with V-shaped abrasive element fitted in and made of abrasive material consisting of silicon carbide, titanium carbide, fillers and binders. Lower layer of element is made of more cheap material, particularly, of titanium alloy.
EFFECT: increased antislip and wear-resistant properties of tire tread.
FIELD: transport engineering; tires.
SUBSTANCE: proposed tire is provided with antislip members in form of stud made of wear resistant material and arranged over tire circumference. Studs are hinge-interconnected by means of fasteners to form flexible chain embedded in tire body with projection of stud over outer surface by 0.5-2 cm.
EFFECT: increased reliability and service life of antislip device.
4 cl, 3 dwg
FIELD: automobile production.
SUBSTANCE: invention relates to motor vehicles. Tyre includes anti-slip bands which are made from corrugated elastic material and equipped with anti-skid spikes. The bands are installed in special sunk bandage belts at tyre tread. Note that belt bottom is performed in a form of projections and dents corresponding to band corrugations.
EFFECT: increase of tyre contact with slippery road and their multifunction.
FIELD: automotive industry.
SUBSTANCE: tire comprises protrusions separated by longitudinal zigzag-shaped grooves to the central rib, middle and lateral rows of protrusions. In the protrusions of the middle rows the inserts of the material are mounted orderly next but one protrusion inside, having the large linear expansion when heated to 40°C.
EFFECT: increase in vehicle flotation in winter and increase in speed and comfort parameters in summer.
FIELD: motor car construction.
SUBSTANCE: portion of the tire tread pattern elements is made of felt, its fibres being selected from the group consisting of textile fibres, mineral fibres and the mix thereof.
EFFECT: better grip with wet road, sufficient tire stability, wear and rolling resistance .
10 cl, 5 dwg, 2 tbl
SUBSTANCE: tread for a pneumatic tyre comprises a plurality of sculptural elements, including the lateral sides and the contact surface intended for performing the contact with the road during the movement of the pneumatic tyre provided with said tread. At least one edge forms the contact boundary of the contact surface with the road. A plurality of cutouts in the form of a track and / or a cut also is represented, wherein said cutouts are bounded by the lateral sides disposed opposite one another. Each sculpture element is formed by at least one first rubber mixture called basic mixture. In the sectional view of a plane normal to the rotation axis of said pneumatic tyre and intersecting at least one contact surface sculptured element, wherein one of the cutouts adjacent to said contact surface is coated, at least partially, with the coating layer. The coating layer comprises a plurality of woven or non-woven fibers that are long fibers with the length greater than 50 mm.
EFFECT: improved characteristics of pneumatic tyres on wet surfaces.
32 cl, 9 dwg, 3 tbl