Method for preparing a tire and system or factory for preparing tires

Abstract

The present invention relates to a method for preparing a tire, comprising determining the vulcanization conditions of the unvulcanized tire and a system or plant for preparing tires to carry out the method according to the present invention. Figure to be published with the abbreviation: [Fig 2]

Description

Title of the invention: Method for preparing a tire and system or plant for preparing tires

[0001] The present invention relates to a method for preparing a tire comprising determining the vulcanization conditions of the unvulcanized tire and a system or plant for preparing tires in order to carry out the method according to the present invention.

[0002] In the tire industry, it is important to respond as effectively and quickly as possible to the needs of automotive manufacturers, particularly with regard to the transition to electric vehicles. Therefore, developing new tire preparation methods is essential to adapt to these needs and the latest regulations. While various methods have been developed in recent years, there is still a need to develop new ones, especially for optimizing manufacturing steps, increasing tire quality, and reducing greenhouse gas emissions, such as carbon dioxide.

[0003] Therefore, an object of the present invention is to develop an improved method of tire preparation allowing the preparation of improved tires while limiting greenhouse gas emissions and being cost-effective.

[0004] Thus, the present invention relates to a method for preparing a tire, the method comprising

[0005] (a) prepare a non-vulcanized tire, comprising the assembly of tire components;

[0006] (b) associate the unvulcanized tire prepared according to (a) with a means identification E, the identification means E comprising one or more pieces of information on one or more characteristics of said tire, obtaining a marked non-vulcanized tire;

[0007] (c) determine the vulcanization conditions of the marked non-vulcanized tire obtained according to (b), comprising

[0008] (cl) identify the unvulcanized tire to be vulcanized by means of identification E associated with the tire according to (b);

[0009] (c.2) measure without contact at least one parameter of said pneumatic marked not vulcanized influencing the vulcanization time of tires;

[0010] (c.3) calculate the vulcanization time of the unvulcanized tire as a function of at least one parameter of said non-vulcanized marked tire influencing the tire vulcanization time measured according to (c.2), obtaining the vulcanization time t(V) of the unvulcanized tire;

[0011] (d) vulcanize the unvulcanized tire in a vulcanizing mold during the vulcanization time t(V) determined according to (c).

[0012] Indeed, the process of the present invention makes it possible to reduce curing time, because the safety measures, which correspond to the added curing time to compensate for measurement error, generally applied as well known to those skilled in the art, can be reduced or even eliminated. This therefore reduces the vulcanization (curing) time of the tires, energy consumption, and thus decreases CO2 emissions due to this type of process. By reducing curing time, this process makes it more efficient and therefore more profitable.

[0013] Preferably the assembly according to (a) is done on a manufacturing drum.

[0014] Preferably, the tire components comprising a tire casing, tire sidewalls, and a tread. Preferably, the assembly comprising mounting the casing on a manufacturing drum and mounting the sidewalls and tread onto the casing.

[0015] For example, the fitting is done with respect to a reference point defined on the drum. Preferably, the reference point is on the manufacturing drum. Preferably, when fitting the tread onto the casing, a seal is formed. Alternatively, the reference point is the seal formed on the tire (e.g., [Fig. 1]).

[0016] Preferably the method further includes the supply of the tire components used according to (a) including the preparation of the tire components, more preferably the preparation of the carcass components, the preparation of the sidewalls and the preparation of the tread.

[0017] Preferably the preparation of tire components includes the use of several unvulcanized tire preparation units, the preparation units being connected to each other by a network, the network being more preferably an internal network, for example an intranet, or an external network.

[0018] Preferably according to (a) the assembly of the pneumatic components is automated.

[0019] Preferably (a) further includes the inflation of the non-vulcanized tire on the manufacturing drum in order to obtain a toroidal shape.

[0020] Preferably the association according to (b) is done by applying the identification means E to one of the sidewalls of the unvulcanized tire prepared according to (a).

[0021] It is possible that the identification means E according to (b) be affixed to one of the sidewalls of the unvulcanized tire prepared according to (a), preferably at a distance dl from said reference point. An example of the placement of E is illustrated in [Fig.1].

[0022] Preferably the association of the tire by means of identification E according to (b), more preferably the application of means E according to (b), is automated.

[0023] Preferably E is a label with a barcode, or a label with a QR code, or a radio tag (in English “RFID tag”).

[0024] Preferably, the barcode, QR code, or radio tag is unique for each tire. This allows the tire to be identified for vulcanization and the vulcanization conditions to be determined individually, rather than only by batch.

[0025] Preferably the association according to (b) is made when the pneumatic is positioned on a manufacturing drum.

[0026] Preferably, the characteristic(s) of the tire according to (b) are the chemical composition of said tire and / or the chemical properties of said tire and / or the physical properties of said tire. The information included in E allows for increased traceability of tires from a factory.

[0027] Preferably (c. 1) includes reading the identification means E, more preferably the barcode, QR code, or RFID tag. Identifying the marked, unvulcanized tire before calculating the vulcanization time also allows the information associated with this means E to be updated at the various manufacturing stages as the manufacturing process progresses.

[0028] Indeed, in the context of the present application, E is an identification means specific to each tire manufactured according to the present invention; it comprises, or is associated in a processing system with, information on the various manufacturing, analysis, and / or quality control stages. Unlike prior art processes, the optimization of the tire preparation process, such as the vulcanization stage, is no longer carried out by batch but individually.

[0029] Preferably the non-contact measurement of at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time according to (c.2) is done by laser scanning or tomography, more preferably by laser scanning.

[0030] Preferably, at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time is the thickness of the tire shoulders and / or the tire thickness at the beads and / or the tire volume. More preferably, at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time is the thickness of the tire shoulders and / or the tire thickness at the beads.

[0031] In the context of the present invention, the thickness of the tire shoulders is the maximum measured thickness of the shoulders of said marked non-vulcanized tire (see [Fig.2]).

[0032] In the context of the present invention, the thickness of the tire at the beads is the maximum thickness measured of said marked non-vulcanized tire at the beads (see [Fig.2]).

[0033] The non-contact measurement according to (c.2) allows for highly accurate measurements, preferably with an accuracy of 5 microns, and therefore reduces uncertainty. This will make it possible to reduce safety measures, which correspond to the added cooking time to compensate for measurement error.

[0034] Preferably, the non-contact measurement according to (c.2) is performed when the marked, unvulcanized tire is placed on the tire manufacturing drum or on a robotic arm. Indeed, the measurement of the tire shoulder thickness and / or the tire thickness at the beads, and / or the tire volume can be carried out when the marked, unvulcanized tire is placed on the robotic arm or directly on the manufacturing drum.

[0035] Preferably when the non-contact measurement is carried out when the marked unvulcanized tire is placed on a robotic arm, this robotic arm is also used for handling the marked unvulcanized tire (e.g. for positioning in a vulcanization mold or for entry or exit from an intermediate storage space).

[0036] Preferably the calculation of the vulcanization time t(V) according to (c.3) is automated.

[0037] Preferably the calculation of the vulcanization time t(V) according to (c.3) is carried out based on the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2). Optionally, the calculation of the vulcanization time t(V) according to (c.3) is performed based on the tire volume measured according to (c.2), in addition to being calculated based on the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2).

[0038] Preferably, the calculation of the vulcanization time t(V) according to (c.3) is carried out as a function

[0039] - of at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time being the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2) and / or the volume of the tire measured according to (c.2) and / or the volume of the tire measured according to (c.2), preferably being the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2);

[0040] - safety measures being the added cooking time to compensate for the error of measurement during the measurement according to (c.2);

[0041] - optionally of the composition of the non-vulcanized tire, plus preferably thermal conductivity based on the composition of the unvulcanized tire;

[0042] - optionally the temperature of the unvulcanized tire to be vulcanized according to (d).

[0043] Preferably, the calculation of the vulcanization time t(V) according to (c.3) is carried out according to one of the following formulas:

[0044] formula (1)

[0045] t(V) = A + Xb + Yc(l);

[0046] formula (2)

[0047] t(V) = A + Xb + Yc + Zd (2);

[0048] formula (3)

[0049] t(V) = A + Xb + Yc + Zd + We (3);

[0050] in which

[0051] A is a constant;

[0052] Xb is a function of the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2) and / or the volume of the tire measured according to (c.2), preferably of the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2);

[0053] Yd is a safety measure function being the added cooking time to compensate for the measurement error according to (c.2);

[0054] Zd is a function of the composition of unvulcanized tire;

[0055] We is a function of the temperature of the unvulcanized tire to be vulcanized according to (d).

[0056] Preferably the vulcanization time t(V) is calculated according to (c.3) at a temperature T and the vulcanization according to (d) is carried out at temperature T. The temperature T is known to the person skilled in the art and can vary according to the type of tires manufactured.

[0057] Preferably the temperature T is in the range of 140 to 300 °C, more preferably in the range of 150 to 200 °C.

[0058] Preferably, the determination of the vulcanization conditions of the marked unvulcanized tire according to (c) is carried out using an electronic data processing means. This means may, for example, use artificial intelligence.

[0059] Preferably the method includes the use of one or more digital twins.

[0060] Preferably, one or more digital twins are based on digital tire design data, data collected via the Internet Objects and a human-machine interface that correlates and presents data to facilitate decision-making. Preferably, decision-making is automated.

[0061] Preferably, the method of the present invention further comprises one or more intermediate storage steps. Preferably, one or more intermediate storage steps are automated.

[0062] Preferably the method includes an intermediate storage step S(I) before (d) and after (b). Preferably (c) is carried out before S(I) or after S(I), during the handling of the unvulcanized tire on a robotic arm.

[0063] Preferably, when a robotic arm is used according to (c.1.1), the method includes removing the marked non-vulcanized tire, placing it on a conveyor (conveyor belt) and picking up the tire with said robotic arm.

[0064] Preferably the robotic arm is connected to a network and possibly with units for preparing unvulcanized tires, more preferably the tire preparation units described herein.

[0065] Preferably, the network is an internal network, such as an intranet, or an external network, more preferably an internal network.

[0066] Preferably the tire mold used according to (d) comprises two lateral parts, each serving for the outer molding of a sidewall of the tire and a peripheral ring divided into at least two segments, more preferably divided into 3 to 20 segments, more preferably into 5 to 15 segments, more preferably into 6 to 10 segments.

[0067] Preferably during step (d) a vulcanizing bladder is used in the vulcanizing mold, in particular to mold the internal shape of the tire.

[0068] In the context of the present invention, the term "internal shape" relating to the mold means the shape of the internal part of the mold, namely the internal part of the mold which houses and is in contact with the marked non-vulcanized tire.

[0069] In the context of the present invention, the peripheral ring is intended to mold the radially external surface of the tread.

[0070] Optionally, the vulcanizing mold is connected to a network, namely an internal network, such as an intranet, or an external network, and by means of electronic data processing (EDP). The vulcanizing mold can further be connected to the tire preparation units defined in this invention.

[0071] Preferably the method of the present invention is a continuous or semi-continuous method.

[0072] Optionally, the method includes the use of one or more conveyor belts.

[0073] The present invention further relates to a system or plant for carrying out the tire preparation method according to the present invention, comprising

[0074] a tire assembly unit for manufacturing a non-vulcanized tire;

[0075] a means of identifying E of a tire;

[0076] a means for associating the non-vulcanized tire with E;

[0077] a means of reading E;

[0078] a means for non-contact measurement of at least one parameter of said pneumatic marked non-vulcanized influencing the vulcanization time of tires, preferably being the thickness of the tire shoulders and / or the thickness of the tire at the beads and / or the volume of the tire;

[0079] a means for calculating the vulcanization time of the marked non-vulcanized tire;

[0080] a vulcanization unit comprising the vulcanization mold and a heating means for vulcanization.

[0081] Preferably the system or plant further includes at least one tire manufacturing drum.

[0082] Preferably the system or plant further includes an electronic processing means for TED data for determining the vulcanization conditions of the marked unvulcanized tire.

[0083] Preferably, the system or plant further comprises at least one means for supplying tire components. This at least one means for supplying tire components is preferably several units for preparing unvulcanized tires.

[0084] Preferably the preparation units comprise one or more mixing units, one or more extrusion units, one or more cutting units, one or more bead / rod winding units (in English “beads”) and apex winding units, and / or one or more assembly units.

[0085] Preferably E is a label with a barcode, or a label with a QR code, or a radio tag (in English “RFID tag”).

[0086] Preferably the system or factory further includes a means for editing E.

[0087] Preferably the means for non-contact measurement of at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time is a laser measuring device or a tomograph.

[0088] Preferably the system or plant further comprises a network enabling the link between at least one of the means included in said system or plant and at least one of the units included in said system or plant, more preferably an internal network of the intranet type.

[0089] Preferably, the system or plant further comprises one or more conveyor belts.

[0090] Preferably the system or plant further comprises at least one tire storage unit, more preferably at least one non-vulcanized tire storage unit and at least one vulcanized tire storage unit.

[0091] The present invention further relates to a vulcanized tire that can be obtained or obtained by a method according to the present invention.

[0092] In the context of the present invention, the term "digital twin" refers to a virtual representation of a product or process that makes it possible to understand and predict its physical equivalents in order to improve an object or method.

[0093] The present invention is further illustrated by the following set of embodiments and combinations of embodiments resulting from dependencies and back references as indicated. In particular, it should be noted that in each case where a range of embodiments is mentioned, for example in the context of a term such as "The method of any one of embodiments 1 to 3", each embodiment in that range is intended to be explicitly disclosed to the person skilled in the art, i.e., the formulation of that term should be understood by the person skilled in the art as being synonymous with "the method of any one of embodiments 1, 2 and 3".Furthermore, it is explicitly noted that the following set of embodiments represents a suitably structured part of the general description directed towards preferred aspects of the present invention and, consequently, appropriately supports, but does not represent, the claims of the present invention.

[0094] According to embodiment 1 of the present invention, a method for preparing a tire, the method comprising

[0095] (a) prepare a non-vulcanized tire, including the assembly of the tire components;

[0096] (b) associate the unvulcanized tire prepared according to (a) with a means identification E, the identification means E comprising one or more pieces of information on one or more characteristics of said tire, obtaining a marked non-vulcanized tire;

[0097] (c) determine the vulcanization conditions of the marked non-vulcanized tire obtained according to (b), comprising

[0098] (cl) identify the unvulcanized tire to be vulcanized by means of identification E associated with the tire according to (b);

[0099] (c.2) measure without contact at least one parameter of said pneumatic marked no vulcanized influencing the vulcanization time of tires;

[0100] (c.3) calculate the vulcanization time of the unvulcanized tire as a function of at least one parameter of said non-vulcanized marked tire influencing the tire vulcanization time measured according to (c.2), obtaining the vulcanization time t(V) of the unvulcanized tire;

[0101] (d) vulcanize the unvulcanized tire in a vulcanizing mold during the vulcanization time t(V) determined according to (c).

[0102] Embodiment 2: The method according to embodiment 1, in which the assembly according to (a) is carried out on a manufacturing drum.

[0103] Embodiment 3: The method according to embodiment 1 or 2, in which the tire components comprise a tire carcass, tire sidewalls and a tread, preferably the assembly comprises placing the carcass on a manufacturing drum and placing the sidewalls and tread on the carcass.

[0104] Embodiment 4: The method according to any one of embodiments 1 to 3, wherein according to (a) the assembly of the tire components is automated.

[0105] Embodiment 5: The method according to any one of the embodiments 1 to 4, in which the association according to (b) is made by applying the identification means E to one of the sidewalls of the unvulcanized tire prepared according to (a).

[0106] Embodiment 6: The method according to any one of embodiments 1 to 5, in which the association of the tire with the means of identification E according to (b) is automated.

[0107] Embodiment 7: The method according to any one of embodiments 1 to 6, in which E is a label with a barcode, or a label with a QR code, or a radio tag (in English “RFID tag”).

[0108] Embodiment 8: The method according to any one of embodiments 1 to 7, in which the association according to (b) is made when the pneumatic is positioned on a manufacturing drum.

[0109] Embodiment 9: The method according to any one of embodiments 1 to 8, wherein the characteristic(s) of the tire according to (b) are the chemical composition of said tire and / or the chemical properties of said tire and / or the physical properties of said tire.

[0110] Embodiment 10: The method according to any one of embodiments 1 to 9, in which (cl) comprises reading the identification means E, preferably the barcode or QR code or radio tag.

[0111] Embodiment 11: The method according to any one of embodiments 1 to 10, wherein the non-contact measurement of at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time according to (c.2) is carried out by laser scanning or tomography, preferably by laser scanning.

[0112] Embodiment 12: The method according to any one of the embodiments 1 to 11, wherein at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time is the thickness of the tire shoulders and / or the thickness of the tire at the beads and / or the tire volume, preferably wherein at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time is the thickness of the tire shoulders and / or the thickness of the tire at the beads.

[0113] Embodiment 13: The method according to any one of the embodiments 1 to 12, wherein the non-contact measurement according to (c.2) is carried out when the marked non-vulcanized tire is placed on a tire manufacturing drum, preferably the manufacturing drum according to embodiment 2, or on a robotic arm.

[0114] Embodiment 14: The method according to any one of the embodiments 1 to 13, in which the calculation of the vulcanization time t(V) according to (c.3) is automated.

[0115] Embodiment 15: The method according to any one of the embodiments 1 to 14, wherein the calculation of the vulcanization time t(V) according to (c.3) is carried out as a function of at least one parameter of said marked non-vulcanized tire influencing the vulcanization time of tires, preferably as a function of the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the level of the beads measured according to (c.2).

[0116] Embodiment 16: The method according to any one of the embodiments 1 to 15, in which the calculation of the vulcanization time t(V) according to (c.3) is carried out as a function

[0117] - of at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time being the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2) and / or the volume of the tire measured according to (c.2);

[0118] - safety measures being the added cooking time to compensate for the error of measurement during the measurement according to (c.2);

[0119] - optionally of the composition of the unvulcanized tire, preferably of thermal conductivity based on the composition of the unvulcanized tire;

[0120] - optionally the temperature of the unvulcanized tire to be vulcanized according to (d).

[0121] Embodiment 17: The method according to embodiment 16, in which the calculation of the vulcanization time t(V) according to (c.3) is carried out according to one of the following formulas:

[0122] formula (1)

[0123] t(V) = A + Xb + Yc(l);

[0124] formula (2)

[0125] t(V) = A + Xb + Yc + Zd (2);

[0126] formula (3)

[0127] t(V) = A + Xb + Yc + Zd + We(3);

[0128] in which

[0129] A is a constant;

[0130] Xb is a function of the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2) and / or the volume of the tire measured according to (c.2), preferably of the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2);

[0131] Yd is a safety measure function being the added cooking time to compensate for the measurement error according to (c.2);

[0132] Zd is a function of the composition of unvulcanized tire;

[0133] We is a function of the temperature of the unvulcanized tire to be vulcanized according to (d).

[0134] Embodiment 18: The method according to any one of embodiments 1 to 17, in which the vulcanization time t(V) is calculated according to (c.3) at a temperature T and the vulcanization according to (d) is carried out at temperature T.

[0135] Embodiment 19: The method according to embodiment 18, wherein the temperature T is in the range of 140 to 300 °C, preferably in the range of 150 to 200 °C.

[0136] Embodiment 20: The method according to any one of embodiments 1 to 19 further includes a storage step.

[0137] Embodiment 21: The method according to embodiment 20, in which (c) is carried out before the storage step, or after the storage step, during the handling of the unvulcanized tire on a robotic arm.

[0138] Embodiment 22: A system or plant for carrying out the tire preparation method according to any one of embodiments 1 to 21, comprising

[0139] a tire assembly unit for manufacturing a non-vulcanized tire;

[0140] a means of identifying E of a tire;

[0141] a means for associating the non-vulcanized tire with E;

[0142] a means of reading E;

[0143] a non-contact measurement means of at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time, preferably being the thickness of the tire shoulders and / or the thickness of the tire at the level of the beads and / or the volume of the tire;

[0144] a vulcanization unit comprising the vulcanization mold and a heating means for vulcanization.

[0145] Embodiment 23: A vulcanized tire that can be obtained or obtained by a method according to any one of embodiments 1 to 21. Description of figures

[0146] Figure 1 shows a drawing of a side view of an unvulcanized tire 1 marked with an identification means E (label with a barcode, QR code label, or RFID tag) and placed on a tire manufacturing drum obtained according to (b) of the method of the present invention. The figure shows the tread 3, the sidewall 5, the identification means E, and the reference point PR on the tire.

[0147] Fig. 2 represents a cross-section of an unvulcanized tire showing the (maximum) thickness of the tire shoulder and the (maximum) thickness of the tire at the beads, preferably measured by a laser measuring device.

Claims

Demands

1. A method for preparing a tire, the method comprising (a) preparing an unvulcanized tire, including the assembly of the tire components; (b) associating the unvulcanized tire prepared according to (a) with an identification means E, the identification means E comprising one or more pieces of information on one or more features of said tire, obtaining a marked unvulcanized tire; (c) determining the vulcanization conditions of the marked unvulcanized tire obtained according to (b), comprising (c1) identifying the unvulcanized tire to be vulcanized by means of the identification means E associated with the tire according to (b); (c2) non-contact measurement of at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time; (c.3) calculate the vulcanization time of the unvulcanized tire as a function of at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time measured according to (c.2), obtaining the vulcanization time t(V) of the unvulcanized tire; (d) vulcanize the unvulcanized tire in a vulcanization mold during the vulcanization time t(V) determined according to (c).

2. The method according to claim 1, wherein the association of the tire with the identification means E according to (b), preferably by affixing the identification means E to one of the sidewalls of the unvulcanized tire prepared according to (a), is automated.

3. The method according to claim 1 or 2, wherein E is a label with a barcode, or a label with a QR code, or a radio tag.

4. The method according to any one of claims 1 to 3, wherein the non-contact measurement of at least one parameter of said marked non-vulcanized tire influencing the tire vulcanization time according to (c.2) is carried out by laser scanning or tomography, preferably by laser scanning.

5. The method according to any one of claims 1 to 4, wherein at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time is the thickness of the tire shoulders and / or the thickness of the tire at the beads and / or the volume of the tire, preferably wherein at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time is the thickness of the tire shoulders and / or the thickness of the tire at the beads.

6. The method according to any one of claims 1 to 5, wherein the non-contact measurement according to (c.2) is carried out when the marked unvulcanized tire is placed on a tire manufacturing drum or on a robotic arm.

7. The method according to any one of claims 1 to 6, wherein the calculation of the vulcanization time t(V) according to (c.3) is carried out as a function of - at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time being the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2) and / or the volume of the tire measured according to (c.2); - safety measures being the added curing time to compensate for the measurement error according to (c.2); - optionally the composition of the unvulcanized tire, preferably the thermal conductivity based on the composition of the unvulcanized tire; - optionally the temperature of the unvulcanized tire to be vulcanized according to (d).

8. The method according to claim 7, wherein the calculation of the vulcanization time t(V) according to (c.3) is carried out according to one of the following formulas: formula (1) t(V) = A + Xb + Yc (1); formula (2) t(V) = A + Xb + Yc + Zd (2); formula (3) t(V) = A + Xb + Yc + Zd + We (3); where A is a constant; Xb is a function of the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2) and / or the volume of the tire measured according to (c.2), preferably of the thickness of the tire shoulders measured according to (c.2) and / or the thickness of the tire at the beads measured according to (c.2); Yd is a function of safety measures being the added curing time to compensate for the measurement error according to (c.2); Zd is a function of the composition of the unvulcanized tire; and We is a function of the temperature of the unvulcanized tire to be vulcanized according to (d).

9. The method according to any one of claims 1 to 8, wherein the vulcanization time t(V) is calculated according to (c.3) at a temperature T and the vulcanization according to (d) is carried out at temperature T.

10. A system or plant for carrying out the tire preparation method according to any one of claims 1 to 9, comprising a tire assembly unit for manufacturing an unvulcanized tire; a tire identification means E; a means for associating the unvulcanized tire with E; a means for reading E; a means for non-contact measurement of at least one parameter of said marked unvulcanized tire influencing the tire vulcanization time, preferably being the thickness of the tire shoulders and / or the thickness of the tire at the beads and / or the volume of the tire; a means for calculating the vulcanization time of the marked unvulcanized tire; a vulcanization unit comprising the vulcanization mold and a heating means for vulcanization.

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