Method for producing a vehicle tire

Abstract

Method for producing a vehicle tire with a tire carcass (10), tire beads with cores, a tire belt and a tread, comprising the following steps: a) positioning a carcass drum (12) in a first winding position (11) in front of a first servicer (13) for placing carcass components at a carcass station (2), b) construction of a tyre carcass (10) with the carcass drum (12), wherein at least the tyre inner layer and one or more carcass inserts are wound onto the carcass drum (12) in the first winding position (11), c) positioning of tyre cores on the carcass drum (12), d) carrying out two layer wraps on the tyre carcass (10), whereby the laterally projecting ends of the carcass plies are wrapped around the tyre cores, e) Lateral movement of the carcass drum (12) with the tyre carcass (10) into a second winding position (5) in front of a second servicer (7) for winding further tyre components, f) Winding two sidewalls or profiled rubber strips in the form of shoulder cushions onto the tyre carcass (10) in the second winding position (5) with the second servicer (7) of the carcass station (2), g) removing the tyre carcass (10) from the carcass drum, h) assembling the tyre carcass with a belt-tread package on a crowning drum (6), i) Completing the vehicle tire with further steps, characterized in that after step f) in which the shoulder cushions have been wound onto the tire carcass (10), the tire carcass (10) is removed from the carcass drum (12) by a carcass stretcher unit (9) and moved to a sidewall station (3) outside the carcass station (2).

Description

[0001] The invention relates to a method for producing a vehicle tire.

[0002] In conventional vehicle tires, the insert is wrapped around a bead core in the tire bead. This firmly anchors the insert or carcass ply in the tire bead. Such conventional vehicle tires are manufactured by first arranging the inner layer and the inserts as wide layers of material on a tire building drum. The bead core is then placed on the insert, and the end of the insert is wrapped around the core.

[0003] In conventional tire manufacturing, the ply end is wrapped around the bead core from the inside of the tire in one process step. In a two-stage process for manufacturing vehicle tires, the tire carcass is built on a separate carcass drum. Such a carcass drum is usually relatively complex.

[0004] In conventional tire building processes, both sidewalls are wound onto the carcass drum. The tire carcass, with the sidewalls already applied, is then moved to the crowning drum. A disadvantage of this conventional process is that certain tire designs cannot be realized.

[0005] DE 11 2004 003 006 T5 and WO 2013 / 011396 A1 disclose known methods for producing vehicle tires.

[0006] The invention is based on the object of providing an improved method for producing vehicle tires.

[0007] The process should also make it possible to create special tire designs, while also enabling flexible use.

[0008] The problem is solved according to claim 1.

[0009] A particular advantage of the invention is that the process allows vehicle tires to be manufactured with a high degree of flexibility and at a high process speed.

[0010] The process also enables the production of special tire constructions that were previously impossible with conventional tire building methods. This type of tire construction is made possible by the inventive sequence of process steps according to patent claim 1. A further advantage is that the overall cycle time for producing the vehicle tire or green tire is optimized.

[0011] The process is also characterized by its high degree of flexibility, as it allows for the realization of different tire designs. This flexibility is achieved in particular by the two adjacent winding positions, which allow tire designs to be realized in which the ends of the sidewalls can be arranged either below or above the belt-tread package. Another key advantage of the second winding position on the carcass drum is that the different servicers for different tire components can be distributed across two winding positions. The servicers with the different tire components are generally arranged one above the other in front of the carcass drum. For space and design reasons, the number of servicers that can be arranged one above the other in the vertical direction is limited.The second winding position also has the advantage that both sidewalls and other tire components can be wound onto the carcass drum. This makes the two different tire designs mentioned above possible.

[0012] In an advantageous development of the invention, it is provided that after step f) the sidewalls wound on the tire carcass are wrapped axially inward around the tire beads of the tire carcass in the second wrapping position using a wrapping means.

[0013] This manufacturing process makes it possible to produce vehicle tires in which the end of the sidewalls ends below the tread.

[0014] In a further advantageous development of the invention, it is provided that after step f) the tire carcass with the connected sidewalls is removed from the carcass drum by a carcass stretcher unit and moved to the crowning drum, wherein after the crowning process the ends of the sidewalls are arranged below the belt-tread package.

[0015] This allows the cycle time for producing the green tire to be optimized.

[0016] It is intended that after step f), in which the shoulder cushions have been wound onto the tire carcass, the tire carcass is removed from the carcass drum by a carcass transfer unit and moved to a sidewall station outside the carcass station.

[0017] This reduces the number of stacked servicers in the first winding position. In subsequent steps, tire designs are implemented in which the ends of the sidewalls are positioned above the belt-tread package.

[0018] In a further advantageous development of the invention, it is provided that after step f) the carcass stretcher unit with the tire carcass is arranged in the sidewall station with two sidewall drums arranged laterally to the carcass drum in a vertical direction, wherein the two sidewall drums are subsequently moved towards one another in the axial direction and positioned coaxially to the tire carcass, wherein subsequently both sidewalls resting on the sidewall drums are pressed against the tire carcass.

[0019] This allows the sidewalls to be prefabricated on separate sidewall drums, saving overall cycle time. Furthermore, the ends of the sidewalls can be subsequently positioned over the tread.

[0020] In a further advantageous development of the invention, it is provided that the carcass stretcher unit with the tire carcass and the connected sidewalls is moved to the crowning drum, wherein the tire carcass is subsequently transferred to the crowning drum.

[0021] In this way, the cycle time for producing the green tire is reduced.

[0022] In a further advantageous development of the invention, it is provided that during the completion of the green tire on the crowning drum, the ends of the sidewalls are arranged above the tread.

[0023] In this way, vehicle tires with special tire properties can be produced.

[0024] In a further advantageous development of the invention, it is provided that at least in steps a) to d) the carcass drum is mounted on one side on a sliding box and on the opposite side on a headstock.

[0025] In this way, the carcass ply ends can be folded around the tire cores using bellows supports.

[0026] In a further advantageous development of the invention, it is provided that in steps e) the carcass drum is separated from the shifting box and moved with the connected headstock on a rail guide into the second winding position of the carcass station.

[0027] This allows the carcass drum to be moved into the second wrapping position at high speed.

[0028] In a further advantageous development of the invention, it is provided that in step b), in the first winding position, additional tire components in the form of a reinforcement component for the sidewalls, a bead reinforcement, and / or additional rubber strips as filler material are wound onto the tire carcass. This allows different tire designs to be produced using the method.

[0029] In a further advantageous development of the invention, it is provided that in step f), in the second winding position of the carcass station, additional tire components in the form of a reinforcement component for the sidewalls, a bead reinforcement, and / or additional rubber strips as filler material are wound onto the tire carcass. This reduces the number of servicers at the first winding position.

[0030] In a further advantageous development of the invention, the distance between the sidewall drums can be variably adjusted in the axial direction. This allows different tire dimensions to be produced.

[0031] In a further advantageous development of the invention, it is provided that the side walls are connected to the tire carcass by means of an expansion in the radial direction.

[0032] In this way, the sidewalls are transferred precisely to the tire carcass.

[0033] The invention will be explained in more detail using several exemplary embodiments. They show: Fig. 1 - 3: an embodiment of the method.

[0034] The Fig. Figure 1 shows a top view of the machine arrangement for carrying out the method. The machine arrangement shown can be used to produce two different types of vehicle tires. In the first production variant, the carcass drum 12 is initially positioned in the carcass station 2 in front of the carcass component service unit 13. Subsequently, the tire carcass 10 is manufactured, with no sidewall components being arranged on the tire carcass 10.

[0035] In the first winding position 11, at least the tire inner ply and one or more carcass plies are wound onto the carcass drum 10. Furthermore, additional tire components, such as bead reinforcements and additional rubber strips, can be wound onto the carcass drum 10 in the first winding position. The tire carcass is then turned over, with the ends of the carcass plies being wrapped around the tire core on both sides. Optionally, the carcass drum 10 can then be moved to the second winding position 5 to apply additional tire structural components, such as shoulder cushions in the form of a pre-profiled rubber strip. In the first production variant, no sidewalls are wound onto the tire carcass in the second winding position 5. The carcass transfer unit 9 is then moved over the carcass drum 10 to receive the finished tire carcass 10.The tire carcass 10 is then moved to the sidewall station 3, where the sidewalls are arranged from the inside onto the tire beads of the tire carcass 10. The sidewall station 3 is in the . Fig. 3. It comprises a right sidewall drum 1 and a left sidewall drum 4, onto which a left and a right sidewall are each wound beforehand. The sidewall drums are then positioned coaxially beneath the tire carcass in order to subsequently arrange the sidewalls on the tire beads of the tire carcass. The tire carcass with the attached sidewalls is then moved to the crowning station with the crowning drum 6. At the crowning drum 6, the tire carcass is joined to the belt-tread assembly, with the ends of the sidewalls being arranged above the belt-tread assembly.

[0036] The second manufacturing variant allows the production of vehicle tires in which the ends of the sidewalls are positioned below the tread. In this manufacturing variant, a tire carcass without sidewalls is first produced on the carcass drum 12 in the first winding position 11. The carcass components are again placed on the carcass component service unit 13.

[0037] The carcass drum 12 is then moved to the second winding position 5, which in this production variant is a second sidewall station. In this position, the sidewalls are wound over the outer circumference of the tire carcass using the second sidewall server 7. The two outer protruding sidewall ends are then folded inward using a rolling device at the tire carcass turn-up station. The finished tire carcass with sidewall components is transferred to the carcass transfer unit 9. The carcass transfer unit with the tire carcass is then moved along the transverse axis 8 of the machine assembly to the crowning station. The crowning drum 6 then connects the tire carcass to a belt-tread package.

[0038] The servicer 13 in front of the first winding position 11 consists of several individual servicers arranged vertically one above the other. The same applies to the servicer 7 in front of the second winding position 5. In the second manufacturing variant, the servicer 7 is designed as a sidewall servicer. The carcass drum 10 is held in the first winding position 11 on the left side by the shift box 17 and on the right side by the headstock 5. Fig. Figure 2 shows the process in which the carcass drum 10 was moved to the second winding position 5, with the carcass drum being held in this position only on the right side by the headstock 15. The transfer box 17 was moved laterally so that the carcass transfer unit 9 can subsequently remove the finished tire carcass 10 from the carcass drum 12.

[0039] The Fig.Figure 3 shows the machine layout with carcass station 2, sidewall station 3, and crowning station 22. Sidewall station 3 is used for the production variant in which the ends of the sidewalls are to be arranged above the belt-tread package. The tire carcass 10 is moved essentially along the transverse axis 8 of the machine arrangement to carry out the individual production steps. The direction of movement P1 schematically represents the movement of the sidewall drums 1 and 4, in which the sidewall drums are arranged on both sides of the tire carcass. The two sidewall drums are then arranged coaxially to the tire carcass in the axial direction P2 in order to subsequently bond the sidewalls to the tire carcass. List of reference symbols 1 Right or first side wall drum 2 Carcass Station 3 side wall station 4 Left or second side wall drum 5 second changing position 6 crowning drum 7 Servicer for side walls or shoulder cushions in the second changing position 8 Transverse axis of the machine arrangement 9 Carcass transfer unit 10 Tire carcass with layer turn-up 11 first changing position 12 Carcass drum in the first winding position 13 Servicer for carcass components at the first wrapping position 14 Base frame 15 Headstock for carcass drum 16 Carcass drum in the position before the 2nd sidewall servicer 17 Sliding box for carcass drum 21 sidewall servicers 22 Crowning station P1 Direction of movement of the side wall drums to the transverse axis P2 Direction of movement of the side wall drums in axial direction

Claims

[1] Method for producing a vehicle tire with a tire carcass (10), tire beads with cores, a tire belt and a tread, comprising the following steps: a) positioning a carcass drum (12) in a first winding position (11) in front of a first servicer (13) for placing carcass components at a carcass station (2), b) construction of a tyre carcass (10) with the carcass drum (12), wherein at least the tyre inner layer and one or more carcass inserts are wound onto the carcass drum (12) in the first winding position (11), c) positioning of tyre cores on the carcass drum (12), d) carrying out two layer wraps on the tyre carcass (10), whereby the laterally projecting ends of the carcass plies are wrapped around the tyre cores, e) Lateral movement of the carcass drum (12) with the tyre carcass (10) into a second winding position (5) in front of a second servicer (7) for winding further tyre components, f) Winding two sidewalls or profiled rubber strips in the form of shoulder cushions onto the tyre carcass (10) in the second winding position (5) with the second servicer (7) of the carcass station (2), g) removing the tyre carcass (10) from the carcass drum, h) assembling the tyre carcass with a belt-tread package on a crowning drum (6), i) Completion of the vehicle tyre with further steps, characterized by that after step f) in which the shoulder cushions have been wound onto the tire carcass (10), the tire carcass (10) is removed from the carcass drum (12) by a carcass tensioner unit (9) and moved to a sidewall station (3) outside the carcass station (2). [2] Method according to claim 1, characterized by that after step f) the side walls wound on the tire carcass (10) are wrapped axially inwards around the tire beads of the tire carcass (10) in the second winding position (5) using a wrapping means. [3] Method according to one of the preceding claims, characterized by , that after step f) the tyre carcass (10) with the attached sidewalls is removed from the carcass drum (12) by a carcass stretcher unit (9) and moved to the crowning drum (6), After the crowning process, the ends of the sidewalls are arranged below the belt-tread package. [4] Method according to one of the preceding claims, characterized by , that after step f) the carcass stretcher unit (9) with the tire carcass (10) is arranged in the sidewall station (3) with two sidewall drums (1, 4) arranged laterally to the carcass drum (12) in the vertical direction (11), wherein the two sidewall drums (1, 4) are subsequently moved towards one another in the axial direction and positioned coaxially to the tire carcass (10), wherein both sidewalls resting on the sidewall drums (1, 4) are subsequently pressed against the tire carcass (10). [5] Method according to one of the preceding claims, characterized by , that the carcass stretcher unit (9) with the tire carcass (10) and the attached sidewalls is moved to the crowning drum (6), wherein the tire carcass (10) is subsequently transferred to the crowning drum (6). [6] Method according to one of the preceding claims, characterized bythat at least in steps a) to d) the carcass drum (10) is mounted on one side on a sliding box (17) and on the opposite side on a spindle box (15). [7] Method according to one of the preceding claims, characterized by that in steps e) the carcass drum (12) is separated from the shifting box (17) and moved with the connected headstock (15) on a rail guide into the second winding position (5) of the carcass station (2). [8] Method according to one of the preceding claims, characterized by that in step b) in the first winding position (11) further tyre components in the form of a reinforcing component for the side walls, a bead reinforcement and / or further rubber strips as filling material are wound onto the tyre carcass (10). [9] Method according to one of the preceding claims, characterized bythat in step f) in the second winding position (5) of the carcass station, further tire components in the form of a reinforcing component for the sidewalls, a bead reinforcement and / or further rubber strips as filling material are wound onto the tire carcass (10).

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