WO2009068629A1

WO2009068629A1 - Method and device for producing, particularly for restoring, the roundness of tires

Info

Publication number: WO2009068629A1
Application number: PCT/EP2008/066367
Authority: WO
Inventors: Bernward Mähner; Stefan Dengler
Original assignee: Maehner Bernward; Stefan Dengler
Priority date: 2007-11-27
Filing date: 2008-11-27
Publication date: 2009-06-04
Also published as: DE102007056967B4; DE102007056967A1

Abstract

The invention relates to a method for producing tires (10), particularly for restoring roundness thereof, said tires comprising a running surface (11), two side walls (12, 13), and a casing (15) supporting the running surface (11), comprising the following process steps: a) at least the running surface (11) and/or the casing (15) of a tire (10) is roughened by removing an amount of material (14); b) the casing (15) is covered with a material strand (27) for forming a new running surface (11); c) wherein the contour (61, 62) of the running surface (11) and/or the casing (15) is measured before and/or during the roughening, and d) wherein the amount of material (14) to be removed is determined by means of the contour data obtained by the measurement.

Description

Method and device for the manufacture, in particular for retreading, of tires

The invention relates to a method for producing, in particular for retreading, tires having a tread, two side walls and a carcass carrying the tread. The sidewalls are usually part of the carcass. The method proposes to rough at least the tread and / or the carcass of a tire by removing a quantity of material and then to cover the carcass with a material strand to form a new tread. The invention further relates to a device for producing, in particular for retreading, of tires by means of which the method according to the invention can be carried out.

It is known that tires for vehicles and aircraft are made up of different material layers. These include, for example, as the innermost layer of Innerliner for sealing tubeless tires, carcass layers to produce a support and tensile structure, one or more belt layers to stabilize the tread and the profiled tread on which the tire rolls on the road.

A tire is therefore a complex product made up of different materials, which is built in several successive stages of production. One of the last steps in building a tire is to apply the tread. Especially in the production of so-called OTR tires (off-the-road) results in the peculiarity that the carcass may have already been vulcanized before applying the tread. In this case, it is indispensable to rough the carcass before applying the tread in order to achieve a sufficient bond between the carcass and the tread.

In the tire retreading, which is of great importance in trucks and aircraft tires, the worn tire is provided with a new tread. Here one differentiates between cold and hot renewal. In the cold renewal, as known for example from EP 0 505 910 B1, a prefabricated tread is mounted on the carcass, wherein the connection between the carcass and the new tread is made via a layer of gum. In the hot renewal, however, the tread and possibly the side edges are rebuilt on the old carcass. For this purpose, a rubber compound in the form of a continuous strand is wound on the tire in several revolutions until the tire at the tread is covered with a sufficiently thick rubber layer. The strand material for covering the tire with the tread rubber may originate directly from an extruder producing the rubber compound. The freshly occupied tire must then be in a hot press, in which he receives his final profile shape and vulcanized the applied rubber material under heat.

In order to bring the used carcass in the tread area in a geometrically correct shape during retreading and to bring the surface of the rubber in a chemically reactive state for connection to the new rubber, the tire is first roughened. This process takes place on a space machine, which removes the remains of the old tread and brightens the surface. Thereafter, either a new tread is built on a slipboard machine (hot renewal) or the tread area is covered with gum on which a prefabricated tread is placed (cold renewal). The tread, usually preformed to the circumference of the tire, is optionally pulled or cut to the required length, and the two ends of the tread are fixed with staples.

In the retreading process, whether hot or cold renewal, it is necessary that the roughened carcass conforms to a geometrically predetermined shape within certain tolerances. To compensate for flaws after roughing by applying additional or reduced amounts of rubber would result in an unbalanced tire or risk of insufficient adhesion of the new tread on the old carcass. The amount of rubber applied to build up the tread or the amount of tying gum applied to the carcass must also be well dosed so that the tire can obtain its correct final shape. If too little rubber is applied, the tire will have undersize areas. If too much rubber is applied, the tire will be oversized. When the hot renewal, this would mean that the tire, for example, not sat in the hot press or receives too much pressure points. During cold renewal, the prefabricated tread would be too long or too short or would not rest evenly on the tying rubber. To determine the required amount of rubber backing therefore the actual circumference and the length of the route between defined points of the opposite tire sidewalls is measured and from this the required amount of rubber is determined. To determine the circumference, for example, a measuring wheel runs in the zenith of the tire during a rotation of the tire on the document machine.

To accurately detect the three-dimensional shape of an object, several methods are known. For example, by projecting line patterns, the surface of an object can be measured. One of these methods is described for example in DE 41 20 115 C2. Another method is the light-section method, in which a thin light-section plane is generated and the line thus generated on an object is recorded by means of a camera. Meanwhile, sensors based on this measuring principle are also available as ready-made measuring systems that already output the measured values calculated by means of triangulation. Such sensors are offered for example by the company Sick in Dusseldorf (www.sick.com).

The use of light section sensors to measure tires is also known. For example, in the manufacture of new tires, sides and ruts are measured in so-called uniformity machines and the tires are classified accordingly. The patent DE 100 19 386 C2 further describes a method in which the structural strength of a tire is tested by the tire is measured three-dimensionally at at least two different pressure levels and from this the shape change behavior of the tire is determined.

In practice it has been found that the measurement of the tire circumference and the length of the route between the opposite tire sidewalls before the rubber material is often not accurate enough to meet current demands for concentricity and geometrical accuracy. Reasons for this are, on the one hand, that the tire does not receive an exactly cylindrical running surface due to roughing, but rather a crowned one; on the other hand that a tire is not rigid, but significantly deformed under the machining forces, so that the final shape always deviates from the way worn by the tool shape. These influences have to be compensated by the tire retreader through his experience and knowledge. A method and apparatus for coating a body, such as a tire carcass, with an elastomeric material, particularly rubber, in the form of uncured strips, is described in US 5,942,059. The method provides to measure the profile of the tread and to compare it with a predetermined profile to control the amount of elastomeric material to be applied. For this purpose, a camera can be used, which detects the contour of the tread.

Furthermore, DE 10 2005 028 231 A1 discloses a concept for monitoring the production of objects consisting of a plurality of material layers. The concept is to create a height profile after applying a material layer and to compare this with a reference information in order to be able to take any measures to correct. The concept can be used in tire production to ensure that the tire cross section follows the given profile over the entire tire circumference.

A method in which a metal detector continuously measures the thickness between the tread and the steel belt to thereby determine the abrasion of a rubber material is described in JP 58001546 A.

Moreover, it is known from US 2004/0084120 A1 to use a detector in a tire grooming machine, which detects during the removal of a fluorescent layer of the tire, which lies above the belt.

The invention has for its object to provide a method and an apparatus for manufacturing, in particular for retreading of tires, which allow the production form loyal tires. This object is achieved by a method according to claim 1 and an apparatus according to claim 22. Preferred embodiments of the invention are defined in claims 2 to 21 and 23 to 35.

The inventive method provides to rough at least the tread and / or the carcass of a tire by removing a quantity of material and to occupy the carcass with a strand of material to form a new tread. Under a material strand in the context of the present invention, both a prefabricated tread, as used in the cold renewal, as well as an extruded Belegegummi, as used in the hot renewal understood. Moreover, in the context of the present invention, a material strand can also be a binding rubber which is used during the cold renewal in order to connect the prefabricated tread to the carcass. The method according to the invention also provides for measuring the contour of the tread and / or the carcass before and / or during roughing, and for determining the amount of material to be removed by means of the contour data obtained by the measurement.

In a preferred embodiment of the method according to the invention not only the tread, but also the sidewalls of the tire are roughened by removing a quantity of material. In this case, the contour of the side walls is preferably measured before and / or during roughing, so that the amount of material to be removed can be determined by means of the contour data obtained by the measurement. Preferably, the contour of the tread and / or the side walls is additionally measured after roughing.

In a further preferred embodiment of the method according to the invention, the contour of the tread and / or the side walls is measured during and / or after the receipt, so that it is possible to obtain a card Cash register with the material strand occupying slip machine in response to the contour data obtained by the measurement. In this context, it has proved to be advantageous to machine the material strand during and / or after covering by means of a cutting device and to control the cutting device by means of the contour data. The machining is particularly useful during hot renewal to remove an excess amount of the material strand.

In a further preferred embodiment of the method according to the invention, the surface of the tire is detected by scanning before roughing. The scanning is expediently a three-dimensional optical and thus non-contact scanning of the surface of the tire. The contour of the tread and / or sidewalls is advantageously measured during scanning.

In a further preferred embodiment of the method according to the invention, the surface of the tire is machined after grinding by grinding in order to achieve a high dimensional accuracy of the tire. The contour of the tread and / or the side walls is measured in this case, advantageously before and / or during and / or after grinding.

Preferably, the size and the location of the amount of material to be removed are determined from the contour data.

A practical embodiment results when the contour of the tread is determined by a spatial measurement of a plurality of sections of the surface of the tread, which are offset from each other in the axial direction of the tire. The contour of the sidewalls, on the other hand, is expediently determined by a spatial measurement of a multiplicity of sections of the surface of the sidewalls, which are offset relative to one another in the radial direction of the tire. Furthermore, it has proven to be appropriate proven to measure the contour of the tread and / or the side walls at a plurality of positions distributed in the circumferential direction of the tire.

Preferably, the contour of the tread and / or the side walls is detected by means of a non-contact measuring method. The non-contact measuring method may be an optical measuring method, in particular a light-section method or a strip projection method, an acoustic measuring method or a capacitive measuring method.

A surface model of the tread and / or the side walls is preferably generated from the contour data.

The contour data suitably comprise not only the measured actual contour, but also a predetermined nominal contour. The amount of material to be removed can be determined in this case by comparing the actual contour with the desired contour. The actual contour is expediently measured continuously.

A practical embodiment also results if the actual contour and the nominal contour are displayed by means of a display unit, for example a monitor. The deviation of the actual contour from the nominal contour is expediently displayed by means of a false-color representation. The actual contour and the nominal contour can be displayed as a surface model of the unwound tire. Alternatively or additionally, the actual contour and the nominal contour can also be displayed as a height profile in the radial direction of the tire.

In a further preferred embodiment of the method according to the invention, the contour data are transmitted to a space machine and / or a slip machine and / or a grinding machine, so that it is possible is to control the space machine, the slip machine and / or the grinding machine depending on the contour data. In this context, it has proven to be advantageous to correlate the measurement of the contour of the tread and / or the side walls with the rotational movement of the tire on the space machine and / or the bedding machine and / or the grinding machine. Due to the correlation, the contour data can be assigned the corresponding rotational positions.

The device according to the invention comprises at least one space machine, a measuring device and an evaluation unit. The spacecraft is designed so that at least the tread and / or the carcass of a tire can be roughened by removing a quantity of material. The measuring device is designed such that the contour of at least the running surface and / or the carcass can be measured, and the evaluation unit is designed so that the amount of material to be removed can be determined by means of the contour data obtained by the measurement.

In a preferred embodiment, the device according to the invention also comprises a laying machine, which is designed so that the carcass can be covered with a strand of material. In this context, it has proved to be advantageous if the device according to the invention comprises a cutting device which is designed so that the material strand can be machined to remove in particular an excess amount of the material strand.

In a further preferred embodiment, the device according to the invention additionally comprises a grinding machine, which is designed so that the surface of the tire can be ground. The final grinding gives the tire a particularly form-true design. In a further preferred embodiment, the device according to the invention further comprises a scanner, which is designed so that the surface of the tire can be detected. The scanner preferably captures the surface of the tire visually and in three dimensions.

In a further preferred embodiment, the device according to the invention also comprises a conveyor, by means of which the tire can be transported. The conveyor may be part of a conveyor system, which feeds, for example, a tire testing system. The conveyor expediently has a scanning module on which the scanner is arranged. The scanning module advantageously has a turntable which is suitable for rotating the tire about its roll axis. In addition, the scanning module expediently has at least one light barrier, which makes it possible to detect the position of the tire. Knowing the position of the tire on the scan module allows the tire to be aligned on the turntable.

In a further preferred embodiment, the device according to the invention has a sensor for detecting the rotational position of the tire. The sensor is preferably connected to the evaluation unit in order to be able to assign the contour data to the detected rotational positions.

Preferably, the measuring device is not only suitable to measure the contour of the tread, but also the contour of the side walls. The measuring device is expediently designed such that the contour of the running surface and / or the side walls can be measured without contact, preferably optically, acoustically or capacitively.

In a further preferred refinement, the device according to the invention has a display unit, for example a monitor, by means of which the contour data can be displayed. The contour data includes in In this case, suitably the measured actual contour and a predetermined nominal contour.

In addition, it has proved to be advantageous if the space machine and / or the slipboard machine and / or the grinding machine have a device for dynamically controlling the rotational speed of the tire to be renewed.

According to the invention, the contour of the tread before and / or during the roughening process is measured, and the measured contour data are used to determine the amount of rubber material to be removed. The contour measurement can be carried out repeatedly and used to determine the amount of rubber still to be removed. In the measurement, advantageously, a plurality of points axially offset along the roll axis of the tire are measured on the surface of the tread area. As a result, the contour of the tread is completely and detailed recorded. Further, the contour measurement is preferably performed for a plurality of positions offset in the circumferential direction of the tire. This gives a contour data set of the entire tire tread. This contour data set is advantageously used to determine the amount of rubber material to be removed depending on location. The location-dependent quantity determination can take into account the position in the tire circumference. In a simpler embodiment of the invention, however, the location-dependent quantity determination is carried out only in the axial direction. The measurements distributed along the circumference of the tire can advantageously also be used to calculate contours averaged over the tire circumference.

According to one aspect of the invention, parts of the outer side walls of the tire are measured in addition to the tread. This is an advantage if in addition to the tread and the side walls are covered with new Gummimatehai, as is common, for example, in the hot renewal.

The measuring device may be mounted directly on the document machine for detecting the tire contour. This is expedient for two reasons: Firstly, a receipt machine has a rotation device for the tire, whereby the contour measurement can be carried out on the entire tire circumference in a simple manner. On the other hand, a measuring device on the receipt machine allows a measurement during the proofing process. This is particularly advantageous if the measured contour data for controlling the documenting process are transmitted to the control of the document machine.

However, it is also expedient to regularly repeat the measurement of the tire contour during the documenting process when the measured contour data are displayed to the operator on a monitor. Thus, the operator can follow the construction of the new tread and, if necessary, readjust the bedding machine manually or turn off when reaching the desired contour timely. This procedure is particularly suitable when older machines are to be retrofitted with the new measuring system. The target contour is the contour that the tire should have reached after the receipt process. It is expediently stored in a memory in the control of the slip machine or in the evaluation unit of the measuring system. A nominal contour is predetermined for example by the heating press. The desired contour may already include a certain pre-profiling of the tread after receipt. The desired contour is advantageously selected from a plurality of desired contours and in such a way that the desired contour is selected for the further processing of the tire, which proves to be most favorable after an example, for example, first measurement of the tire. The desired contours can be used in practice for example, correspond in number and shape existing in the manufacturing plant heating presses.

If a single measurement of the contour before the beginning of the documenting process is sufficient, the measurement can also be carried out on the setup side of the document machine, if the document machine has a setup page and a processing page, as is the case with the Marangoni Alpha Twin Builder.

To perform the contour measurement according to the invention when roughening the tire is of particular advantage, since it is unfavorable in practice to compensate for larger dimensional errors of the tire after roughing by applying additional or omitting rubber material during the subsequent Belegevorgangs. In order to ensure a sufficiently correct geometric shape of the tire in the tread area and optionally in the sidewall region, the contour of the tire is measured according to the invention before and / or during the roughening process. With the measured contour data, the amount of (still) to be removed rubber material is then determined. The measurement takes place with advantage analogous to the document machine directly on the space machine, as well as a space machine has a drive for rotating the tire. After completion of the roughening process, the tire is advantageously measured again in order, for example, to select the most favorable nominal contour for further processing and / or to already generate a first contour data set for the subsequent documenting process.

The target contour to be achieved by the rough and the target contour to be achieved by the documenting are always different, in particular even if the target contour for roughing and the target contour for documenting are aimed at a specific tire size. This is given by the fact that the Belegegummischicht must always have a non-negligible layer thickness.

Details and further advantages of the invention will be described below with reference to an embodiment. In the drawings, which only schematically illustrate the exemplary embodiment, illustrate in detail:

1: a schematic representation of the retreading of a tire:

2a shows a plan view of a conveyor, which has a scan module;

FIG. 2b shows a side view of the conveyor device according to FIG. 2a; FIG.

3 shows a schematic representation of a space machine;

4: a schematic representation of a slip-on machine;

Fig. 5: a schematic representation of a grinding machine;

Fig. 6 is a schematic representation of the detection of the contour of the tread and the side walls of a tire and

Fig. 7: a schematic representation of the display of measured

Contour data.

The retreading of a tire shown schematically in FIG. 1 comprises four process steps. In method step A, the surface of the tire to be renewed is scanned. For this purpose, as shown in FIGS. 2a and 2b, a scanner 80 is used which three-dimensionally detects the surface of the tires 10a, 10b, 10c to be renewed. The scanner 80 expediently uses an optical measuring method and comprises, for example, a line laser and a sensor. After the surface has been detected, the tire 10 to be renewed is roughened in the method step B. For this purpose, the tire 10 is clamped on a space machine 50, as shown in Fig. 3. After the rough becomes the renewing tire 10 in step C is covered with a strand of material 27, which in the case of cold renewal, for example, is a prefabricated tread and, in the case of hot renewal, an extruded rubber. After being set on a receipt machine 20, as shown in FIG. 4, the tire 10 to be renewed is clamped on a grinding machine 70, as shown in FIG. 5, in method step D. The grinding machine 70 serves to finally grind the surface of the tire 10 to ensure a high dimensional accuracy of the tire 10.

FIGS. 2 a and 2 b show that the tires 10 a, 10 b, 10 c to be renewed are usually transported by means of a conveyor 100. The conveyor 100 comprises a plurality of conveyor modules 101, 102, which may be provided with a conveyor belt or, as in the present case, with a roller conveyor. The conveyor 100 also includes a scanning module 110, on which the scanner 80 is arranged. The scan module 110 has a turntable 111, which makes it possible to rotate the tire 10b on the scan module 110 about its roll axis R. The turntable 111 is connected to a drive 112 by means of a toothed belt 113 for this purpose. The turntable 111 is further provided with a conveyor belt or a roller conveyor, which make it possible to receive the tires 10a, 10b, 10c from the conveyor module 101 and to convey them to the conveyor module 102. The scanner 80 is arranged so that upon complete rotation of the tire 10b, the entire tread of the tire is detected. The scanning module 110 is further provided with light barriers 114, 115, which make it possible to detect the position of the tire 10b on the scanning module 110, so that the tire 10b can be aligned on the turntable 111.

FIG. 3 shows the schematic structure of the spacecraft 50, which is provided with a measuring device 42. The spacecraft 50 comprises a tensioning cowl 51 for receiving the tire 10, a drive 53 for rotating the tire 10 about the axis 52, a roughing tool 54, a drive 55 for the roughing tool 54 and a controller 56. The roughing tool 54 consists of a group of disc-shaped cutting plates over the drive 55 are set in rotation. For roughening the tire 10, the rotating roughing tool 54 is pressed against the running surface 11 of the rotating tire 10. For processing the side walls 12, 13 are not shown, further Rauwerkzeuge with drive available.

The measuring device 42 detects the contour of the tire 10 over the entire width of the tread area 11. The measuring device 42 consists for example of a light section sensor with a line laser and an area camera. The contour data acquired by the measuring device 42 are transmitted to an evaluation unit 44 for further processing. In order to be able to assign the respective rotational position of the tire 10 to the detected contour data, the rotational position of the axle 52 and thus of the tire 10 is detected by a rotational position sensor 43 and transmitted to the evaluation unit 44. Throughout the roughening process, the tire 10 is regularly measured by the measuring device 42. In the first phase of the roughening process, if necessary, the remnants of the old tread are removed from the tire 10. In the production of OTR tires with a new carcass that is vulcanized, this phase is not required. Based on the now measured contour of the tread 11, a desired contour 61 is selected and used as a default for the further roughening. The desired contour 61 and the measured actual contour 62 are displayed to the operator by means of a display unit 45. The operator can thus observe the approach of the actual contour 62 to the nominal contour 61 during the roughening process and, if appropriate, intervene in the process. The contour data are further transmitted to the controller 56 of the spacecraft 50, which controls in this way the delivery of the roughing tool 54 and the rotational speed of the drive motor 53 of the rotation axis 52 by means of a regulator 57. As soon as the measured actual contour 62 with the predetermined nominal contour 61 sufficiently accurate matches, the roughness is terminated. The tread contour detected in a final measurement is transmitted to the slip machine 20 used for the subsequent covering process. As a result, a new measurement of the roughened tire 10 on the slip machine 20 is not absolutely necessary.

4 shows the schematic structure of the slip-type machine 20, which is likewise provided with a measuring device 42 for detecting the contour of the tire 10 to be renewed. The wrapping machine 20 comprises an expansion rim 21 for receiving the tire 10, a drive 23 for rotating the tire 10 about the axis 22, an extruder 24 provided with an extruder die 25 for producing a continuous rubber strand 27, a strand guide 26 for transferring the rubber strand 27 the tread 11 and the side walls 12, 13 of the tire 10.

By extruding the rubber strand 27 while rotating the tire 10 and axially reciprocating the strand guide 26, the extruded rubber material 27 is wrapped around the tire 10 so that tread 11 and side walls 12, 13 of the tire 10 are coated with extruded rubber material 27 , During the Belegevorgangs the tire 10 thereby grows in height and in width. By means of the measuring device 42, which consists for example of a light section sensor, the growing contour of the tire 10 is detected during the Belegevorgangs over the entire width of the tread 11. The detected contour data are tapped by the measuring device 42 via an evaluation unit 44. The evaluation unit 44 may for example consist of an image processing system. In order to arrange the detected contour data in the correct position in the tire circumferential direction U, the rotational position of the tire 10 is detected via a rotational position sensor 43. The rotational position sensor 43 may for example consist of a rotary encoder. The measured and evaluated contour data th are displayed to the operator via the display unit 45. The display is supplemented by simultaneous display of the nominal contour 61, so that the instantaneous deviation of the actual contour 62 from the nominal contour for the operator is immediately apparent. The contour data are further transmitted to the controller 28 of the slip machine 20. The document machine 20 adjusted based on the data obtained from the actual contour 62 of the tire 10 via the controller 29, the rotational speed of the drive 23 for rotation of the tire 10, the movement of the strand guide 26 and the flow rate of the extruder die 25. The Belegevorgang is terminated as soon as the tire 10 over the entire tread 11 has reached the desired contour 61.

By means of a cutting device 30, which has a cutting steel 31, if necessary, excess material can be removed. However, this should be avoided if possible because of the associated loss of material and the additional work involved.

The grinding machine 70 shown in FIG. 5 is similar in construction to the space machine 50. Accordingly, the grinding machine 70 comprises a clamping rim 71 which is rotatable about a rotation axis 72 driven by a drive 73. Instead of a roughing tool, the grinding machine 70 has a grinding tool 74, which rotates by means of a drive 75 and against the running surface 11 and, but not shown, if necessary, against the side walls 12, 13 of the tire 10 can be pressed. The grinding machine 70 also has a controller 76, which comprises a controller 77. By means of the controller 77, in particular the drives 73, 74 can be regulated as a function of the contour data obtained by the measurement.

6 shows the schematic representation of the method when measuring the running surface 11 and the two side walls 12, 13. In this case, the measuring device 46 detects the first side wall 12 of the tire 10 and the measuring device 47 the second side wall 13 of the tire 10. As already shown in FIGS. 3 and 5, the device 42 detects the tread area 11 of the tire 10. The measuring devices 42, 46 and 47 are arranged on a holder 41, which in the present case is designed as a portal. Also shown are the actual contour 62 and the nominal contour 61 of the tire 10. The actual contour 62 of the tire 10 is detected by the measuring devices 42, 46 and 47. The tire 10 has a quantity of material 14 still to be removed on the carcass 15; the desired contour 61 has not yet been reached. Thus, the conditions during the roughening process are shown by way of example.

The desired contour 61 has a profiling of the tire 10 in the axial direction a. This profiling can be generated by the subsequent Belegevorgang again by the amount of documents is varied depending on the axial position a on the tread 11.

Fig. 7 shows the schematic representation of the measurement results for the operator. This is particularly important if the operator should manually influence the roughness or Belegevorgang. On the display unit 45, which is for example a computer monitor, the target contour 61 and the actual contour 62 are displayed. The contours shown correspond to radial height profiles. Dimensional arrows 63 show the measuring points of the measured values 64 along the tread contour. During the machining process, the actual contour 62 will approach the nominal contour 61 when the actual contour 62 is continuously measured. When the nominal contour 61 is exceeded by the actual contour 62, the relevant measuring point 63 can then optionally be represented with a different color. LIST OF REFERENCE NUMBERS

Tire 45 Display unit a Tire 46 Measuring device for the first tire Sidewall c Tire 47 Measuring device for second tread Side wall First side wall Second side wall 50 Spacecraft Amount of material 51 Tensioning rim Carcass 52 Rotation axis

53 Drive Rotary axis Documenting machine 54 Roughing tool Expansion rim 55 Drive Roughing tool Rotary axis 56 Control of spacecraft Drive Rotary axis 57 Speed control Extruder Extruder nozzle 61 Nominal contour of strand guide 62 Actual contour of material strand 63 Measuring point Control of document machine 64 Measured value Speed control

70 Grinder Cutting device 71 Clamping wheel Cutting steel 72 Rotary axis

73 Drive Rotary axis Bracket Measuring device 74 Grinding tool Measuring device for running surface 75 Drive Grinding tool Rotary position sensor 76 Control grinding machine evaluation unit ne 77 Speed control

80 scanners

100 conveyor

101 conveyor module

102 conveyor module

110 scan module

111 turntable

112 drive

113 toothed belt

114 photocell

115 photocell

R roll axis

U circumferential direction a axial direction r radial direction

Claims

claims

Method for producing, in particular for retreading, tires (10) having a tread (11), two side walls (12, 13) and a carcass (15) carrying the tread (11), comprising the following steps: at least the running surface (11) and / or the carcass (15) of a tire (10) is roughened by removing a quantity of material (14); b) the carcass (15) is covered with a strand of material (27) to form a new tread (11); c) wherein the contour (61, 62) of the tread (11) and / or the carcass (15) before and / or during roughing is measured, and d) wherein determined by means of the contour data obtained by the measurement, the amount of material (14) to be removed becomes.

2. The method according to claim 1, characterized in that the side walls (12, 13) of the tire (10) by removing a quantity of material (14) are roughened, wherein preferably the contour (61, 62) of the side walls (12, 13) in front and / or measured during roughing, and by means of the contour data obtained by the measurement, the amount of material (14) to be removed is determined.

3. The method according to claim 1 or 2, characterized in that the contour (61, 62) of the tread (11) and / or the side walls (12, 13) is measured after roughing.

4. The method according to any one of claims 1 to 3, characterized in that the contour (61, 62) of the tread (11) and / or the side walls (12, 13) during and / or after the receipt is measured.

5. The method according to claim 4, characterized in that the material strand (27) is machined during and / or after the documents by means of a cutting device (30), wherein the cutting device (30) is controlled by means of the contour data.

6. The method according to any one of claims 1 to 5, characterized in that the surface of the tire (10) is detected by roughing before scanning, wherein preferably the contour (61, 62) of the tread (11) and / or the side walls ( 12, 13) is measured during scanning.

7. The method according to any one of claims 1 to 6, characterized in that the surface of the tire (10) is processed after the documents by grinding, wherein preferably the contour (61, 62) of the tread (11) and / or the side walls ( 12, 13) is measured before and / or during and / or after grinding.

8. The method according to any one of claims 1 to 7, characterized in that from the contour data, the size and the location of the amount of material to be removed (14) are determined.

9. The method according to any one of claims 1 to 8, characterized in that the contour (61, 62) of the tread (11) by a spatial measurement of a plurality of portions of the surface of the tread (11), in the axial direction (a) of the tire (10) are offset from each other, is determined.

10. The method according to any one of claims 2 to 9, characterized in that the contour (61, 62) of the side walls (12, 13) by a spatial measurement of a plurality of portions of the surface of the side walls (12, 13) in the radial Direction (r) of the tire (10) are offset from each other, is determined.

11. The method according to any one of claims 1 to 10, characterized in that the contour (61, 62) of the tread (11) and / or the side walls (12, 13) at a plurality of positions in the circumferential direction (U ) of the tire (10) are measured.

12. The method according to any one of claims 1 to 11, characterized in that the contour (61, 62) of the tread (11) and / or the side walls (12, 13) by means of a non-contact optical measuring method, preferably a light section method or a stripe projection method is detected, or a non-contact acoustic measurement method or a non-contact capacitive measurement method.

13. The method according to any one of claims 1 to 12, characterized in that from the contour data, a surface model of the tread (11) and / or the side walls (12, 13) is generated.

14. The method according to any one of claims 1 to 13, characterized in that the contour data comprise the measured actual contour (62) and a predetermined nominal contour (61), wherein the amount of material to be removed (14) by comparing the actual contour (62) with the desired contour (61) is determined.

15. The method according to claim 14, characterized in that the actual contour (62) is measured continuously.

16. The method according to claim 14 or 15, characterized in that the actual contour (62) and the desired contour (61) by means of a display unit (45) are displayed.

17. The method according to claim 16, characterized in that the deviation of the actual contour (62) from the desired contour (61) is displayed by means of a false color representation.

18. The method according to claim 16 or 17, characterized in that the actual contour (62) and the desired contour (61) are displayed as a surface model of the unwound tire (10).

19. The method according to any one of claims 16 to 18, characterized in that the actual contour (62) and the desired contour (61) as height profile in the radial direction (r) of the tire (10) are displayed.

20. The method according to any one of claims 1 to 19, characterized in that the contour data to a space machine (50) and / or a slip machine (20) and / or a grinding machine (70) are transmitted.

21. The method according to claim 20, characterized in that the measurement of the contour (61, 62) of the tread (11) and / or the side walls (12, 13) with the rotational movement of the tire (10) on the spacecraft (50) and / or the document machine (20) and / or the grinding machine (70) is correlated, wherein the correct rotational positions are assigned to the contour data by the correlation.

22. Device for producing, in particular for retreading, tires (10) having a running surface (11), two side walls (12, 13) and a carcass (15) carrying the running surface (11), with a space machine (50) suitable for roughing at least the running surface (11) and / or the carcass (15) of a tire (10) by removing a quantity of material (14); a measuring device (42) which is suitable for measuring the contour (61, 62) of at least the running surface (11) and / or the carcass (15), and an evaluation unit (44) which is suitable by means of the Measurement obtained contour data to determine the amount of material to be removed (14).

23. The apparatus according to claim 22, characterized by a slip machine (20) which is suitable to occupy the carcass (15) with a strand of material (27).

24. The device according to claim 23, characterized by a cutting device (30) which is adapted to machine the material strand (27).

25. Device according to one of claims 22 to 24, characterized by a grinding machine (70) which is adapted to grind the surface of the tire (10).

26. Device according to one of claims 22 to 25, characterized by a scanner (80) which is adapted to preferably optically detect the surface of the tire (10).

27. Device according to one of claims 22 to 26, characterized by a conveyor (100) which is adapted to transport the tire (10 a, 10 b, 10 c).

28. The apparatus of claim 26 and 27, characterized in that the conveyor (100) comprises a scanning module (110) on which the scanner (80) is arranged.

29. The device according to claim 28, characterized in that the scan module (110) has a turntable (111) which is adapted to rotate the tire (10) about the roll axis (R).

30. Device according to claim 28 or 29, characterized in that the scanning module (110) has at least one light barrier (114, 115) which is suitable for detecting the position of the tire (10).

31. Device according to one of claims 22 to 30, characterized by a sensor (43) for detecting the rotational position of the tire (10), wherein preferably the sensor (43) with the evaluation unit (44) is connected to the contour data to the detected rotational positions assigned.

32. Device according to one of claims 22 to 31, characterized in that the measuring device (46, 47) is adapted to measure the contour (61, 62) of the side walls (12, 13).

33. Device according to one of claims 22 to 32, characterized in that the measuring device (42, 46, 47) is configured, the contour (61, 62) of the tread (11) and / or the side walls (12, 13) without contact , preferably optically, acoustically or capacitively, to measure.

34. Device according to one of claims 22 to 33, characterized by a display unit (45) which is adapted to display the contour data, wherein preferably the contour data comprise the measured actual contour (62) and a predetermined nominal contour (61).

35. Device according to one of claims 22 to 34, characterized in that the space machine (50) and / or the slip machine (20) and / or the grinding machine (70) comprises means (29, 57, 77) for dynamically regulating the rotational speed of the tire (10).