Manipulation apparatus and method for manipulating annular tyre structures

Abstract

A handling apparatus for handling a toroidal tyre structure (200), the handling apparatus comprising a plurality of gripping members (5) mounted on a toroidal frame (2). Each gripping member (5) comprises a radially movable shoe (6) and an actuator (8) interposed between the toroidal frame (2) and the respective shoe (6). Each actuator (8) is configured to generate an operating movement of the shoe (6) independent of the operating movement of the other shoes, independently of the other actuators. A monitoring system is configured to perform a position monitoring, by which the radial position of each shoe (6) is monitored during the operating movement of each shoe (6) in the presence or absence of force monitoring, and a force monitoring, by which the force exchanged between each shoe (6) and the toroidal tyre structure (200) is monitored during the operating movement of each shoe (6).

Description

Technical Field

[0001] The present invention relates to a manipulation device for manipulating a ring-shaped tire structure and a method for manipulating a ring-shaped tire structure.

[0002] The present invention also relates to a forming machine and a method for constructing a green tire. Background Technology

[0003] Tires for vehicle wheels typically include a carcass structure comprising at least one carcass ply having corresponding opposing ends that engage with a corresponding anchoring ring structure integrated in an area commonly referred to as a "bead," the inner diameter of which roughly corresponds to the tire's "mounting diameter" on the corresponding mounting rim.

[0004] An impermeable coating, commonly referred to as a "liner," can cover the inner surface of the tire carcass structure and thus the inner surface of the tire.

[0005] The carcass structure is associated with a belt structure, which may include one or more belt layers that are radially stacked relative to each other and relative to the carcass ply, and have woven or metal reinforcing cords that have a cross orientation and / or a orientation substantially parallel to the circumferential extension direction (0 degrees) of the tire.

[0006] A tread belt is applied at a radially external position relative to the belt structure, and the tread belt, like other components of the tire, is made of an elastomeric material.

[0007] A corresponding sidewall made of elastomeric material is also applied to the axially outer position on the side surface of the carcass structure, each sidewall extending from one of the side edges of the tread strip to the corresponding anchoring ring structure at the bead.

[0008] In the process of constructing a tire, it is possible to specify the separate manufacture of the so-called "carcass sleeve" and the so-called "outer sleeve".

[0009] To manufacture the carcass sleeve, one or more carcass ply layers are applied to the construction drum. Anchoring annular structures are fitted or formed on opposite end flaps of the carcass ply / multiple carcass ply layers, the end flaps then being folded substantially upward around the annular structure itself to enclose the anchoring annular structure in a loop. Before terminating the construction of the carcass sleeve, at least a portion of the sidewalls may be applied to the carcass ply / multiple carcass ply layers.

[0010] To manufacture the outer sleeve, one or more belt layers are applied to a second or auxiliary drum in a radially stacked manner. At least a portion of the tread belt and possible sidewalls are applied at radially outer positions of the belt layers / multiple belt layers.

[0011] Then pick up the outer sleeve from the auxiliary drum so that it can be connected to the tire sleeve.

[0012] For this purpose, the outer sleeve is coaxially arranged around the carcass sleeve. Subsequently, the carcass plies or multiple carcass plies approach each other axially through the bead and simultaneously introduce pressurized fluid into the carcass sleeve, causing radial expansion of the carcass plies until they are formed to adhere to the inner surface of the outer sleeve and are shaped according to the toroidal configuration.

[0013] The assembly of the tire carcass sleeve and the outer sleeve can be actuated on the same drum used to manufacture the tire carcass sleeve; this is known as a "single-stage construction process" or "single-stage process".

[0014] The construction process is also known to have a so-called "two-stage" type, in which a so-called "first-stage drum" is used to manufacture the carcass sleeve, and the assembly between the carcass sleeve and the outer sleeve is actuated on a so-called "second-stage drum" or "forming drum", where the carcass sleeve picked up from the first-stage drum and the outer sleeve picked up subsequently from the auxiliary drum are transferred to the "second-stage drum" or "forming drum".

[0015] After the construction of the tire, molding and vulcanization processes are typically performed. These processes are designed to determine the structural stability of the tire by crosslinking the elastomer composition and, if necessary, to imprint the desired tread design and any unique graphic markings on the tire's sidewalls.

[0016] "Annular tire structure" refers to an annular structure obtained during the process of constructing a green tire, and includes one or more components of the tire itself.

[0017] According to the first example, the annular tire structure is an outer sleeve.

[0018] According to the second example, the annular tire structure is an assembly consisting of a carcass sleeve and an outer sleeve, for example, in the coupling step or in an immediately following step.

[0019] According to the third example, the annular tire structure is the raw tire itself.

[0020] According to the fourth example, the annular tire structure is a tire body sleeve.

[0021] "Brake shoe" refers to a movable element that is adapted to abut against the radial outer surface of a ring tire structure in order to clamp the ring tire structure.

[0022] "Operating motion" refers to the motion used to open and / or close the brake shoes, preferably radial motion, for manipulating the annular tire structure, particularly for clamping or releasing the annular tire structure.

[0023] "Independent operation motion" refers to a motion in which the strokes performed by different brake shoes can be controlled independently and are therefore actively different from each other, and this is independent of the presence of a ring tire structure.

[0024] "Monitoring system" refers to a component of mechanical and electrical / electronic parts that is appropriately constructed to perform the described function.

[0025] "The forces exchanged between the brake shoe and the toroidal tire structure" refers to the main radial load applied to the brake shoe by the toroidal tire structure as it reacts to the contact and clamping of the brake shoe itself.

[0026] "Drive signal generated based on position monitoring" or "drive signal generated based on position and force monitoring" refers to a signal generated when a deviation relative to a specific reference value is detected by monitoring, and / or a signal associated with an appropriate instruction when a deviation relative to a specific reference value is detected by monitoring.

[0027] "Control action" refers to an action designed to correct and / or signal potential irregularities.

[0028] "Electric shaft" refers to an electrical / mechanical component used for linear motion in a mechanical system.

[0029] The term "radial" and the expression "radial in / out" are used in reference to the radial direction of the device (e.g., drum, clamping ring) and / or the tire, i.e., the direction perpendicular to the axis of rotation or center of the device / devices / tire.

[0030] The term "axial" and the expressions "axially in / out" are used in reference to the axial direction of the device (e.g., drum, clamping ring) and / or the tire, i.e., the direction parallel to the axis of rotation or central axis of the device / devices / tire.

[0031] The terms “circumferential” and “circumferentially” are used to refer to the annular extension of the device or tire used.

[0032] The term "elastomeric material" is intended to refer to a composition comprising at least one elastomeric polymer and at least one reinforcing filler. Preferably, such a composition also contains additives, such as crosslinking agents and / or plasticizers. Due to the presence of the crosslinking agent, this material can be crosslinked by heating, thereby forming the final finished product.

[0033] WO2012 / 021160 describes a transfer ring including brake shoes movable relative to first and second housing rings. The collective radial movement of the brake shoes is driven by an actuator ring rotatably mounted between the housing rings.

[0034] US5861079 describes a transfer ring for a tire assembly machine. According to such a document, current practice in the tire industry involves constructing the tire carcass and tread belt separately. The tread belt forms a belt bundle, which must then be precisely positioned onto the tire carcass by a transfer ring, which can also be used to move the raw tire. Specifically, a tire assembly machine is described comprising an annular shape on which the belt bundle structure is assembled. The annular shape is arranged coaxially with a drum on which the tire carcass structure is positioned. A transfer ring is slidably mounted between the annular shape and the drum. The transfer ring includes multiple grippers pneumatically supplied by a single supply source. Different supply sources can be provided, arranged circumferentially along the ring to achieve uniform closure of the grippers. Each gripper moves independently of the others until it contacts the belt bundle; in fact, once in contact with the belt bundle, the advance of each gripper stops. The activation and independent movement of each gripper gives the grippers the possibility of taking slightly different radial positions from each other while they grip and hold the belt bundle. Therefore, when all grippers are in contact with the belt bundle, they do not necessarily follow the same stroke. The actual stroke of the gripper depends on the centering accuracy of the transfer ring relative to the ring shape or potential defects in the belt itself. In particular, a pneumatic actuation is provided that allows for independent radial stroke of each gripper, providing a degree of flexibility in adjusting the positioning of the transfer ring within the assembly machine and limiting the risk of deformation of the belt or the tire to be gripped. Summary of the Invention

[0035] In the tire manufacturing sector, the applicant has observed an increasing need for a balance: on the one hand, the ability to change production between different medium / small batch tires, and on the other hand, the need to maintain a constant level of high quality without negatively impacting cycle time.

[0036] The applicant has recognized the possibility of balancing these opposing aspects by inserting precise control over the steps of the construction process, thereby avoiding the introduction of additional stations or components.

[0037] In particular, the applicant has recognized the ability to gain precise control over the steps of the manufacturing process by using the steps of clamping and / or transferring tire components, especially toroidal tire structures.

[0038] The applicant has observed that the accuracy of the mechanical actuators described in WO2012 / 021160 decreases during use due to wear and adjustment losses, which leads to an increase in the clearance between the mechanical components used.

[0039] The applicant has observed that the pneumatic actuation described in US5861079 is described as independent for each gripper because it does not mechanically force the grippers to perform the same stroke, but is instead constructed (because it is pneumatic) to allow one or more grippers to stop upon contact with the belt while other grippers can continue their forward stroke. This characteristic makes a lack of coaxiality between the transfer ring and the assembly consisting of the toroidal shape and the drum acceptable. Therefore, the precision required to adjust the coaxiality between the transfer ring and the assembly consisting of the toroidal shape and the drum is less than the precision required to adjust the coaxiality between the toroidal shape and the drum. Thus, the applicant has observed that document US5861079 teaches to tolerate coaxiality precision errors between the transfer ring and the assembly consisting of the toroidal shape and the drum to limit the amount of adjustment to be performed.

[0040] In view of the foregoing, the applicant has observed that US5861079 entrusts the precision of the mutual positioning between the tire carcass and the belt to the use of a specific assembly machine comprising an annular shape on which the belt structure is constructed and the precise axial positioning between such an annular shape and the drum.

[0041] By pursuing the opposite objective of US5861079, namely, to achieve accurate control over the steps of the manufacturing process by limiting possible inaccuracies as much as possible, the applicant has ultimately found that the combination of active independent movement of the brake shoe and position monitoring allows for the prevention of clearances and provides further information related to tire quality that can be used in various modes across the manufacturing process / equipment.

[0042] According to a first aspect, the present invention relates to a maneuvering device for manipulating a ring-shaped tire structure.

[0043] Preferably, a clamping ring is provided.

[0044] Preferably, the clamping ring includes an annular frame and a plurality of clamping members mounted on the annular frame and distributed according to the circumferential direction of the annular frame itself.

[0045] Preferably, each of the plurality of clamping members includes a brake shoe that is movable relative to the annular frame between a plurality of radial positions and has a clamping surface facing the central axis of the clamping ring.

[0046] Preferably, the clamping surface is designed to contact the radial outer surface of the annular tire structure.

[0047] Preferably, the clamping surfaces of the plurality of clamping members are arranged in a circumferential direction relative to the central axis.

[0048] Preferably, each clamping member includes an actuator inserted between the annular frame and the corresponding brake shoe, and is configured to generate operative movement of the brake shoe between the plurality of radial positions independently of other actuators.

[0049] Preferably, the operating motion of the brake shoe is independent of the operating motion of other brake shoes.

[0050] Preferably, a monitoring system is provided, which is configured to perform position monitoring, thereby monitoring the radial position of each brake shoe during the operational movement of each brake shoe.

[0051] According to a second aspect, the present invention relates to a method for manipulating a ring-shaped tire structure.

[0052] Preferably, a plurality of brake shoes are arranged according to a circumferential direction around a central axis, each of the plurality of brake shoes being movable between a plurality of radial positions and having a clamping surface facing the central axis, wherein the clamping surfaces of the plurality of brake shoes are arranged according to a circumferential direction relative to the central axis.

[0053] Preferably, each brake shoe is arranged in a first radial position suitable for receiving the annular tire structure to be operated.

[0054] Preferably, the annular tire structure wound around the drum is arranged within the plurality of brake shoes and is coaxial with the central axis.

[0055] Preferably, each brake shoe is operated and moved independently to generate an operational closing motion, which begins from a first radial position and brings the brake shoe to a second radial position, in which the clamping surface contacts and holds the annular tire structure.

[0056] Preferably, position monitoring is performed, wherein the radial position of each brake shoe is monitored at least during the operative closing motion of each brake shoe.

[0057] Preferably, the radially contracting drum is removed axially from the annular tire structure held by the brake shoes.

[0058] Therefore, the applicant believes that a high-precision control system with no clearance can be arranged, which also allows for the use of tire components, particularly the clamping and / or transfer steps of the toroidal tire structure, to further obtain available information related to tire quality, thereby improving the level of control over the steps of the construction process.

[0059] According to a third aspect, the present invention relates to a forming machine comprising an operating device according to a first aspect adapted to receive at least one outer sleeve and a mandrel adapted to receive a body sleeve.

[0060] According to a fourth aspect, the present invention relates to a method for constructing a green tire.

[0061] Preferably, a tire sleeve is constructed on the construction drum.

[0062] Preferably, an outer sleeve is constructed on the auxiliary drum.

[0063] Preferably, the outer sleeve is clamped by a plurality of brake shoes of a clamping ring of a forming machine by means of applying the method for manipulating the annular tire structure according to the second aspect, wherein the outer sleeve defines the first annular tire structure.

[0064] Preferably, the tire body sleeve is formed inside the outer sleeve by connecting the tire body sleeve and the outer sleeve together.

[0065] The applicant believes that by applying the manipulation system according to the first and second aspects to the forming step, the level of control over the steps of the construction process is further improved, thereby improving the connection between the outer sleeve and the body sleeve, both in terms of mutual coaxiality and the absence of defects caused by the preceding construction steps.

[0066] In one or more of the foregoing aspects, the present invention may include one or more of the following features.

[0067] Preferably, force monitoring is performed, wherein the force exchanged between each brake shoe and the annular tire structure is monitored at least during the operative closing motion of each brake shoe.

[0068] Preferably, the monitoring system is configured to perform force monitoring, thereby monitoring the force exchanged between each brake shoe and the annular tire structure at least during the operative closing motion of each brake shoe.

[0069] Preferably, the control action is performed based on the location monitoring.

[0070] Preferably, the control action is performed based on the position monitoring and the force monitoring.

[0071] Preferably, the control action includes one or more of the following:

[0072] - Control at least the operational closed motion based on the position monitoring.

[0073] - Control at least the operational closed motion based on the position monitoring and the force monitoring.

[0074] -Signal or activate maintenance or adjustment interventions for stations or devices used to construct ring-shaped tire structures.

[0075] - Signal or activate adjustment interventions for the steps used to construct the ring tire structure.

[0076] Preferably, the monitoring system is configured to generate drive signals for performing the control actions.

[0077] Preferably, the drive signal is generated based on the position monitoring.

[0078] Preferably, the drive signal is generated based on the position monitoring and the force monitoring.

[0079] The applicant believes that monitoring the radial position of the brake shoes, or the radial position and force of the brake shoes, helps improve tire quality. This not only allows control over the actual clamping steps that affect the arrangement of the annular tire structure in subsequent processes, but also allows for intervention in preceding processes. For example, it is possible to:

[0080] - Each brake shoe is adjusted independently to achieve a defined position or a defined position and a specific radial load;

[0081] - Each brake shoe is adjusted independently to maintain synchronization between brake shoes, especially during the step of contacting the annular tire structure;

[0082] - Adjust the coaxiality of the annular tire structure and the brake shoe;

[0083] - To intervene in order to eliminate defects caused by the construction and / or manage possible maintenance or adjustment interventions.

[0084] Preferably, performing the position monitoring includes detecting the radial position of each brake shoe at least during the operation closing motion and comparing the detected radial position with at least one reference value.

[0085] Preferably, the monitoring system is configured to detect the radial position of each brake shoe at least during the operating motion and to compare the detected radial position with at least one reference value.

[0086] Preferably, the radial position of each brake shoe is detected by means of a position sensor.

[0087] Preferably, performing the force monitoring includes detecting the force exchanged between each brake shoe and the annular tire structure and comparing the detected exchanged force with at least one reference value.

[0088] Preferably, the monitoring system is configured to detect the force exchanged between the brake shoe and the annular tire structure and to compare the detected force exchanged with at least one reference value.

[0089] Preferably, the force exchanged between each brake shoe and the annular tire structure is detected by means of a force sensor. Alternatively, if each brake shoe is actuated by an actuator that includes an electric motor, detecting the force exchanged between each brake shoe and the annular tire structure preferably includes performing torque control of the electric motor.

[0090] Knowing the radial position or radial position and the force of exchange, and its comparison with a reference value (e.g., an absolute reference value), allows for the arrangement of additional target information about the known clamping system and increases control without introducing additional steps and / or devices and without affecting cycle time.

[0091] Preferably, performing the position monitoring includes comparing the detected radial positions of the brake shoes with each other, each detected radial position defining a reference value for the radial positions of other detected brake shoes.

[0092] Preferably, the monitoring system is configured to compare the detected radial positions of the brake shoes with each other, each detected radial position defining a reference value for the radial positions of other detected brake shoes.

[0093] Preferably, performing the force monitoring includes comparing the exchanged forces detected for each brake shoe with each other, wherein each exchanged force detected at a brake shoe defines a reference value for the exchanged forces detected at other brake shoes.

[0094] Preferably, the monitoring system is configured to compare the exchange forces detected for each brake shoe with each other, wherein each exchange force detected at a brake shoe defines the reference value of the exchange forces detected at other brake shoes.

[0095] Knowing the radial position of the brake shoes relative to other brake shoes, or the exchanging forces between the brake shoes and other brake shoes, allows for information about the synchronicity of the movement of each brake shoe, in the presence of independent actuators, where the brake shoes are structurally disconnected from the other brake shoes. Furthermore, this comparison allows for the arrangement of additional target information regarding known clamping systems and increases control without introducing additional steps and / or devices and without affecting cycle time.

[0096] Preferably, controlling at least the operational closing motion includes driving an actuator associated with the brake shoe to restore the reference value of the radial position when a detected radial position deviates from a reference value.

[0097] Preferably, the control action includes driving the actuator to restore the radial position to the reference value when the detected radial position deviates from the reference value.

[0098] Preferably, the monitoring system is configured to generate a drive signal pointing to one or more of the actuators when a detected radial position deviates from a reference value in order to restore the reference value of the radial position.

[0099] Preferably, controlling at least the operational closing motion includes driving an actuator associated with the brake shoe to restore the reference value of the exchange force when the detected exchange force deviates from a reference value.

[0100] Preferably, the control action includes driving the actuator to restore the reference value of the exchange force when the detected exchange force deviates from the reference value.

[0101] Preferably, the monitoring system is configured to generate a drive signal pointing to one or more of the actuators to restore the reference value of the exchanged force when the detected exchanged force deviates from a reference value.

[0102] Brake shoes are managed and controlled by independently checking and / or adjusting each brake shoe based on a reference position or a reference value of the force exchanged between the reference position and the reference position (e.g., related to the type and size of the toroidal tire structure) or based on a reference position (e.g., related to the position taken by other brake shoes), in order to keep them synchronized.

[0103] By managing and controlling the radial position of the brake shoes, the clamping accuracy of the annular tire structure can be improved, thus positively impacting its positioning in subsequent steps. For example, when manipulating the outer sleeve in a step prior to connection with the carcass sleeve, managing and controlling the radial position of the brake shoes affects the accuracy of their coaxial positioning.

[0104] Preferably, the relative axial positioning movement of the annular structure and the transport manipulator that carries the annular tire structure is controlled.

[0105] Preferably, the control action includes signaling or activating an adjustment intervention for the steps of constructing the annular tire structure when the detected radial position deviates from the reference value.

[0106] Preferably, the monitoring system is configured to generate a drive signal to the control unit of the equipment when a detected radial position deviates from a reference value, for signaling or activating adjustment interventions for the steps of constructing the annular tire structure.

[0107] Preferably, the control action includes signaling or activating an adjustment intervention for the steps of constructing the annular tire structure when the detected exchange force deviates from a reference value.

[0108] Preferably, the monitoring system is configured to generate a drive signal to the control unit of the equipment when the detected exchange force deviates from a reference value, for signaling or activating adjustment interventions for the steps of constructing the annular tire structure.

[0109] Preferably, the control action includes signaling or activating maintenance or adjustment interventions for the station or device used to construct the annular tire structure when the detected radial position deviates from the reference value.

[0110] Preferably, the monitoring system is configured to generate a drive signal pointing to the control unit of the equipment when a detected radial position deviates from a reference value, for signaling or activating maintenance or adjustment interventions at the station or construction device.

[0111] Preferably, the control action includes signaling or activating maintenance or adjustment interventions for the station or device used to construct the annular tire structure when the detected exchange force deviates from a reference value.

[0112] Preferably, the monitoring system is configured to generate a drive signal directed to the control unit of the equipment when the detected exchange force deviates from a reference value, for signaling or activating maintenance or adjustment interventions at the station or construction device.

[0113] Incorrect positioning of one or more brake shoes, detection of unexpected radial loads, or both of these conditions may indicate a defect in the construction of the annular tire structure.

[0114] Preferably, the control action includes signaling or activating maintenance or adjustment interventions for the clamping rings comprising the plurality of brake shoes.

[0115] Preferably, the adjustment intervention of the clamping ring includes releasing the annular tire structure and performing an adjustment movement opposite to the closing movement of the operation until the brake shoe abuts against the radially outer end stop.

[0116] Preferably, the adjustment intervention of the clamping ring includes releasing the annular tire structure and performing an adjustment movement according to the operation closing motion until the brake shoe abuts against the flange of the adjustment member having a lateral dimension corresponding to the radial adjustment position of the brake shoe.

[0117] Therefore, monitoring data can be used to correct and / or predict potential errors in brake shoe movement, which is the basis for maintaining the clamping ring or allows for effective maintenance. It can also verify and automatically calibrate the concentricity of the brake shoes.

[0118] Preferably, the actuator is an electric actuator. More preferably, the actuator includes an electric motor.

[0119] Preferably, the actuator includes an electric shaft and a rotary electric motor associated with a corresponding position sensor.

[0120] Preferably, the actuator includes an electric shaft and a rotary electric motor, the electric shaft being inserted between the rotary electric motor and the brake shoe.

[0121] More preferably, the rotary electric motor is brushless.

[0122] Preferably, the electric actuator includes a linear electric motor.

[0123] Preferably, the linear electric motor is inserted between the annular frame and the brake shoe.

[0124] More preferably, the linear electric motor is directly connected to the brake shoe.

[0125] Preferably, the brake shoe can move along a radial trajectory relative to the annular frame.

[0126] Preferably, the monitoring system includes a position sensor for each clamping member, the position sensor being configured to generate a position signal indicating the radial position of the corresponding brake shoe.

[0127] Preferably, the monitoring system includes at least one electronic monitoring module configured to receive the location signal.

[0128] Preferably, each position sensor is associated with a brake shoe.

[0129] More preferably, each position sensor is associated with an actuator. If the actuator includes an electric motor, the position sensor is preferably an encoder associated with the electric motor.

[0130] Preferably, the monitoring system includes a force sensor for each clamping member, the force sensor being configured to generate a force signal indicating the force exchanged between each brake shoe and the annular tire structure during the operating movement.

[0131] Preferably, the monitoring system includes at least one electronic monitoring module configured to receive the force signal.

[0132] Preferably, the force sensor is a force sensor that operates under traction or compression.

[0133] Preferably, the force sensor is obtained by applying a strain gauge directly to each brake shoe.

[0134] Preferably, the force sensor is inserted between the brake shoe and the actuator.

[0135] If the actuator comprises a rotary electric motor and an electric shaft inserted between the rotary electric motor and the brake shoe, then the force sensor is preferably inserted between the electric shaft and the brake shoe.

[0136] If the actuator includes an electric motor, then preferably the monitoring system is configured to perform torque control of the electric motor in order to perform the force monitoring.

[0137] Preferably, the clamping ring includes a radially outer end stop corresponding to the radial adjustment position of the brake shoe.

[0138] Preferably, the end stop is formed from the fixed portion of the clamping member or the circumferential surface of the annular frame.

[0139] Preferably, the end stop is formed from the head surface of the electric shaft of the actuator.

[0140] The presence of end stops allows the zero or reference position of the brake shoes to be uniquely defined by using the brake shoes themselves and the fixed parts to which they are connected.

[0141] Preferably, the clamping ring includes brake shoes in a number different from the number of vulcanization sections of the vulcanization mold arranged downstream of the operating device.

[0142] More preferably, the clamping rings include brake shoes in a number that is a multiple or approximation of the number of vulcanization sections of the vulcanization mold arranged downstream of the operating device.

[0143] Preferably, the clamping ring includes brake shoes in a number different from the number of drum construction sections used for construction.

[0144] More preferably, the clamping rings include brake shoes in a number that is a multiple or approximation of the number of drum construction sections used for construction.

[0145] Preferably, the clamping ring includes an odd number of brake shoes, more preferably nine brake shoes.

[0146] In this way, the presence of defects that are always circumferentially distributed at the same frequency can be limited, thereby limiting the occurrence of other harmonics in the annular tire structure that may cause vibration of the finished tire.

[0147] Preferably, the manipulator is positioned in a fixed location on the forming machine, and the mandrel is axially movable to approach and move away from the clamping ring.

[0148] Preferably, the mandrel is stably connected to the forming drum.

[0149] Alternatively, the mandrel is preferably configured to receive a construction drum on which the tire sleeve is disposed, and the construction drum is adapted to operate as a forming drum in a forming machine.

[0150] Preferably, the clamping ring performs a radial external resistance function during the forming of the tire carcass sleeve.

[0151] Preferably, an adjusting member is provided, which includes at least one flange and preferably includes a central shaft on which the flange is mounted.

[0152] Preferably, the central shaft is adapted to be mounted on the mandrel of the forming machine.

[0153] Preferably, the lateral dimension of the flange corresponds to the radial adjustment position of the brake shoe.

[0154] More preferably, the flange has a polygonal shape with the number of sides equal to the number of brake shoes of the clamping ring, for example, nine.

[0155] In this way, the radial position of the brake shoes relative to the theoretical axis representing the target reference point can be adjusted by checking and automatically calibrating the concentricity of the brake shoes.

[0156] Preferably, the approach stroke of the operation closing motion is performed, which brings the brake shoe from a first radial position to a radial contact position, where the clamping surface contacts the annular tire structure.

[0157] Preferably, the radial contact position of the brake shoe is detected by the position monitoring and the force monitoring.

[0158] Preferably, the initial step of radial contraction of the drum and the tracking stroke of the operation closing motion are performed simultaneously, the tracking stroke bringing the brake shoe from the radial contact position to the second radial position.

[0159] Preferably, the operation closing motion is stopped when the brake shoe is found to be in the second radial position, and the radial contraction of the drum continues until the radial dimension suitable for the drum to be axially removed from the annular tire structure is reached.

[0160] Preferably, the clamping surface remains in contact with the annular tire structure during the tracking stroke.

[0161] In this way, dynamic, synchronous, and simultaneous tracking is achieved between the brake shoe and the drum, which allows for the recovery of possible elastic contractions, such as the elastic contraction of the outer sleeve.

[0162] Preferably, the brake shoe is locked in the second radial position.

[0163] If the outer sleeve defines a first annular tire structure, then preferably the control action is performed based on the position monitoring, the control action being related to the clamping conditions of the outer sleeve and / or the construction conditions of the outer sleeve.

[0164] If the outer sleeve defines a first annular tire structure, then control actions are preferably performed based on the position monitoring and the force monitoring, the control actions being related to the clamping conditions and / or the construction conditions of the outer sleeve.

[0165] Preferably, the tire sleeve is arranged on the mandrel of the forming machine, coaxial with respect to the outer sleeve, and in a radially inward position.

[0166] Preferably, the second annular tire structure is defined by an assembly consisting of a tire carcass sleeve arranged within an outer sleeve.

[0167] Preferably, the tire sleeve is formed inside the outer sleeve, while the brake shoe of the clamping ring is locked in a second radial position and serves as a support for the formation.

[0168] Preferably, the carcass sleeve is picked up from the construction drum and positioned on the forming drum of the forming machine. Alternatively, the carcass sleeve is arranged on a mandrel to remain connected to the construction drum, which performs the function of the forming drum.

[0169] Preferably, the mandrel carrying the carcass sleeve is axially translated until the carcass sleeve is positioned radially inward relative to the outer sleeve, while the axial position of the clamping ring remains unchanged.

[0170] Preferably, the forces exchanged between each brake shoe and the second annular tire structure are monitored during the forming of the tire carcass sleeve.

[0171] Preferably, the control action is performed based on the position monitoring and the force monitoring, the control action being related to the forming conditions of the carcass sleeve and / or the construction conditions of the outer sleeve or carcass sleeve.

[0172] Preferably, the second annular tire structure is rolled outside the clamping ring to obtain a green tire.

[0173] More preferably, an opening movement of the brake shoe is generated, which is opposite to the closing movement of the operation, and the mandrel carrying the second annular structure is axially translated until it is placed in the rolling station, while the axial position of the clamping ring remains unchanged.

[0174] Preferably, the raw tire is held by the plurality of brake shoes, wherein the raw tire defines a third annular tire structure.

[0175] Preferably, the control action is performed based on the position monitoring, and the control action is related to the clamping conditions of the raw tire and / or the construction conditions of the raw tire.

[0176] Preferably, the control action is performed based on the position monitoring and the force monitoring, the control action being related to the clamping conditions of the green tire and / or the construction conditions of the green tire.

[0177] Other features and advantages will become clearer from the following detailed description of preferred embodiments. Attached Figure Description

[0178] This description will be illustrated below with reference to the accompanying drawings, which are provided as non-limiting examples, in which:

[0179] Figure 1 The clamping ring used to manipulate the annular tire structure is schematically shown;

[0180] Figure 2 Different configurations are shown Figure 1 Clamping ring;

[0181] Figures 3A-3C The diagram schematically illustrates different configurations corresponding to several actions used in manipulating the annular tire structure. Figure 1 A section of the clamping ring;

[0182] Figure 4 The diagram illustrates the adjustment. Figure 1 The components of the clamping ring;

[0183] Figure 5 A schematic top view of the equipment used for tire production is shown;

[0184] Figure 6-12 Different configurations corresponding to several actions in the method for constructing a green tire are shown. Figure 5 A side view of part of the equipment. Detailed Implementation

[0185] Referring to the accompanying drawings, reference numeral 1 indicates a clamping ring belonging to the actuation device for manipulating the annular tire structure 200. This clamping ring 1 is suitable for use in tire manufacturing equipment 100 ( Figure 5 The equipment 100 includes a construction station and / or device 101 configured to actuate at least one step for constructing the annular tire structure 200. Between such construction stations and / or devices, a rolling station, more specifically designated 102, includes, for example, one or more rolling rollers 102a.

[0186] 103 represents the control unit equipped with 100, and 104 represents the vulcanizing mold for the raw tire.

[0187] In the equipment 100, a drum 300 suitable for performing a specific function is used, the drum including, for example, at least one construction drum 301 (for constructing the tire body sleeve), at least one auxiliary drum 302 (for constructing the outer sleeve), and a forming drum 303 (for forming the tire body sleeve and assembling the tire body sleeve and the outer sleeve).

[0188] The clamping ring 1 allows manipulation of the annular tire structure 200 manufactured during the construction of the green tire. The annular tire structure 200 may be, for example, an outer sleeve 201, a carcass sleeve 202, an assembly 203 consisting of a carcass sleeve and an outer sleeve, or a green tire 204.

[0189] The clamping ring 1 includes an annular frame 2 extending around the central axis 3. Preferably, the annular frame 2 has a circular shape around the central axis 3, and in particular, it has a ring shape. More preferably, the annular frame 2 consists of a closed structure that completely surrounds the internal space 4.

[0190] The manipulator can be used as a moving part of the production equipment for clamping and translating the annular tire structure 200, or it can be used as a fixed part of the production equipment as described below for clamping and providing the annular tire structure 200.

[0191] The clamping member 5 is designated as mounted on the annular frame 2. The clamping member 5 includes a brake shoe 6 having a clamping surface 7 facing the central axis 3. The clamping surface 7 is intended to contact the radially outer surface 205 of the annular tire structure 200.

[0192] The brake shoe 6 can move in multiple radial positions relative to the annular frame 2 and relative to the central axis 3. Preferably, the brake shoe 6 can move along a radial trajectory relative to the annular frame 2. Regarding the operating motion, the brake shoe 6 can move between a first radial position or a radially outer position and a second radial position or a radially inner position.

[0193] The clamping ring 1 includes a plurality of clamping members 5, which are distributed on the annular frame 2 in accordance with the circumferential direction of the annular frame itself. In addition, the brake shoes 6 and the corresponding clamping surfaces 7 are arranged in a circumferential direction relative to the central axis 3.

[0194] Figure 1 and Figure 3A The diagram shows a first radial position of the brake shoe 6 and the corresponding clamping surface 7, at which the clamping ring 1 can receive the annular tire structure 200 to be manipulated.

[0195] Figure 2 and Figure 3C The diagram shows a second radial position of the brake shoe 6 and the corresponding clamping surface 7, in which each clamping surface 7 contacts and holds the annular tire structure 200.

[0196] Preferably, the number of clamping members 5 or the number of brake shoes 6 is different from the number of vulcanization sections of the vulcanization mold 104 arranged downstream of the operating device. More preferably, the number of clamping members 5 or the number of brake shoes 6 is different from a multiple or approximation of the number of vulcanization sections of the vulcanization mold 104.

[0197] Preferably, the number of clamping members 5 or the number of brake shoes 6 is different from the number of construction segments of the one or more drums 300 used for construction. More preferably, the number of clamping members 5 or the number of brake shoes 6 is different from a multiple or approximation of the number of construction segments of the one or more drums 300 used for construction.

[0198] According to the example shown, the number of clamping members 5 or the number of brake shoes 6 is an odd number and preferably equal to nine.

[0199] Each clamping member 5 includes an actuator 8, preferably an electric actuator 8, which is inserted into the annular frame 2 and the corresponding brake shoe 6. Figure 3A Between. The clamping ring 1 therefore includes a plurality of actuators 8 that are independent of each other, with one actuator for each clamping member 5. Each brake shoe 6 is actuated and moved independently of the actuators of the other brake shoes by its actuator 8.

[0200] Each actuator 8 is configured to generate the operating movement of the brake shoe 6 between a first radial position and a second radial position independently of the other actuators. This operating movement of the brake shoe is independent of the operating movements of the other brake shoes.

[0201] Each clamping member 5 is associated with a position sensor 9. Preferably, the position sensor 9 is associated with a brake shoe 6, and more preferably, the position sensor 9 is associated with an actuator 8. Each position sensor 9 is configured to generate a position signal S1 indicating the radial position of the corresponding brake shoe during operational movement. As an alternative to that shown, other types of position sensors 9 may be provided, for example, the position sensor 9 may be formed by an external sensor capable of detecting the radial position of the brake shoe 6.

[0202] The actuator 8 can be of an electric type and, in particular, it can include an electric motor. As shown, for example, in the accompanying drawings, the electric actuator 8 includes a rotary electric motor 10, preferably a brushless motor. An electric shaft 11 is operatively inserted between the rotary electric motor 10 and the brake shoe 6 to convert the rotational motion output from the rotary electric motor 10 into linear motion of the brake shoe 6. This conversion is achieved, for example, via a lead screw / nut drive connection. As shown, for example, in the accompanying drawings, the electric shaft 11 includes a slider 11a integral with the brake shoe 6 and slidable along a linear guide 11b integral with the annular frame 2.

[0203] As shown, for example, in the accompanying drawings, the rotary electric motor 10 is associated with the position sensor 9, preferably with an encoder.

[0204] As an alternative to the one shown, other types of actuators 8 can be provided, such as linear electric motors that are directly inserted between the annular frame 2 and the brake shoe 6. In this case, preferably, there is no electric shaft and the linear electric motor is preferably directly connected to the brake shoe 6.

[0205] Each clamping member 5 is associated with a force sensor 12. The force sensor 12 is configured to generate a force signal S2 indicating the force exchanged between each brake shoe 6 and the annular tire structure 200 during the operational movement of the brake shoe itself.

[0206] Preferably, the force sensor 12 is a force sensor that operates under traction or compression. Alternatively, the force sensor 12 can be formed by a strain gauge (not shown) applied directly to each brake shoe 6.

[0207] As shown, for example, in the accompanying drawings, the force sensor 12 can be inserted between the brake shoe 6 and the actuator 8. Preferably, according to the foregoing example, the force sensor 12 is inserted between the motor shaft 11 and the brake shoe 6, more preferably between the slider 11a and the brake shoe 6.

[0208] The clamping ring 1 includes an end stop 13 corresponding to a radially adjusted position of the brake shoe 6. The end stop 13 is arranged in a radially outward position. The end stop 13 may be formed, for example, by the fixed portion of the clamping member 5, or it may be formed, for example, by the circumferential surface of the annular frame 2. As shown, for example, in the figures, the end stop 13 may be formed by the head surface of the electric shaft 11, particularly the head surface of the linear guide 11b.

[0209] The operating device includes a monitoring system, which includes at least one electronic monitoring module 14.

[0210] According to a possible embodiment, the monitoring system includes each position sensor 9. An electronic monitoring module 14 is configured to receive a position signal S1 generated by each position sensor 9. In this case, the monitoring system is configured to perform position monitoring, by which the radial position of each brake shoe 6 is monitored during a corresponding operational movement.

[0211] According to a possible embodiment, the monitoring system includes each force sensor 12. An electronic monitoring module 14 is configured to receive a force signal S2 generated by each force sensor 12. In this case, the monitoring system is configured to perform force monitoring, by which the force exchanged between each brake shoe 6 and the annular tire structure 200 during the operational movement of each brake shoe 6 is monitored.

[0212] Preferably, the monitoring system is configured to perform position monitoring and force monitoring.

[0213] refer to Figure 4 Figure 15 shows an adjusting member comprising at least one flange 16 and preferably a central shaft 17 on which the flange 16 is mounted. The lateral dimension of the flange 16 corresponds to the radial adjustment position of the brake shoe 6. The flange 16 preferably has a polygonal shape with the number of sides equal to the number of brake shoes 6 of the clamping ring 1.

[0214] Preferably, two or more flanges 16 are provided, which are arranged on the same central axis 17 and have different lateral dimensions and correspond to the radial adjustment positions of the brake shoes 6 respectively.

[0215] The use of the control device enables a method for manipulating the annular tire structure 200, during which each brake shoe 6 undergoes an operational movement generated by a corresponding actuator 8 independently of the other actuators.

[0216] In order to hold the annular tire structure 200, each brake shoe 6 is initially arranged in the first radial position.

[0217] The annular tire structure 200, wound around the drum 300, is arranged within multiple brake shoes 6 and is coaxial with the central axis 3. Figure 3A ).

[0218] If the annular tire structure 200 is the outer sleeve 201, then the drum 300 is preferably the auxiliary drum 302.

[0219] If the annular tire structure 200 is a tire carcass sleeve 202, then the drum 300 is preferably a construction drum 301.

[0220] If the annular tire structure 200 is an assembly 203 consisting of a tire sleeve arranged coaxially with respect to the outer sleeve and located radially inward, then the drum 300 is preferably a shaped drum 303.

[0221] If the annular tire structure 200 is a green tire 204, then the drum 300 is preferably a shaped drum 303.

[0222] Each brake shoe 6 is actuated and moved independently of each other to generate an operational closing motion that moves the brake shoe from a first radial position to a second radial position. This operational closing motion is generated, for example, by an actuator 8. The operational closing stroke performed by each brake shoe 6 with the operational closing motion is indicated by the reference numeral "X" (…). Figure 3C ).

[0223] Preferably, the operation closing stroke "X" is divided into an approach stroke X1 and a tracking stroke X2.

[0224] Initially, an approach stroke X1 is performed, which brings the brake shoe 6 from a first radial position to a radial contact position, where the clamping surface 7 contacts the annular tire structure 200. Figure 3B-3C ).

[0225] Subsequently, a tracking stroke X2 is executed, which moves the brake shoe 6 from the radial contact position to the second radial position ( Figure 3CSimultaneously with the tracking stroke X2, the initial step of radial contraction of the drum 300 is performed. Preferably, the clamping surface 7 remains in contact with the annular tire structure 200 during the tracking stroke X2.

[0226] When the brake shoe is found to be in the second radial position, the closing motion of the brake shoe 6 is interrupted. Preferably, the brake shoe 6 is locked in the second radial position.

[0227] The radial contraction of drum 300 continues until the radial dimension suitable for axial removal of drum 300 from the annular tire structure 200 is reached.

[0228] The radially contracting drum 300 is formed by the brake shoe 6 ( Figure 3C The ring-shaped tire structure is axially removed at 200°.

[0229] To release the annular tire structure 200, each brake shoe 6 initially positioned in the second radial position is actuated and moved according to an operational opening movement opposite to the operational closing movement until it reaches the first radial position. Preferably, the operational opening movement is also generated independently for each brake shoe 6. Preferably, the operational opening movement is also generated by an actuator 8.

[0230] Position monitoring can be performed at least during the operation of the closing motion, through which the radial position of each brake shoe 6 is monitored.

[0231] Preferably, position monitoring is provided for detecting the radial position of each brake shoe 6. The monitoring system is preferably configured to perform this detection, for example, by sending a position signal S1 to the electronic monitoring module 14.

[0232] The detected radial position is compared with at least one reference value. The monitoring system, particularly the electronic monitoring module 14, is configured to perform this comparison.

[0233] The reference value can be an absolute reference value, that is, the specific radial position that the brake shoe 6 must occupy.

[0234] The reference value can be a relative reference value, i.e., the radial position occupied by other brake shoes 6. In this case, the detected radial positions of brake shoes 6 are compared with each other, and each detected radial position defines a reference value for the radial positions of other detected brake shoes.

[0235] Preferably, the detected radial position is compared with an absolute reference value and a relative reference value.

[0236] Based on position monitoring, if a deviation relative to a reference value is detected, a control action is executed. For example, the monitoring system, particularly the electronic monitoring module 14, is configured to generate a drive signal S3 to execute such a control action.

[0237] The control action can be specified to control at least the closing motion based on position monitoring. For example, each brake shoe can be adjusted independently to achieve a defined position and / or each brake shoe can be adjusted independently to maintain synchronization between brake shoes, especially in the step of abutting the annular tire structure 200. Preferably, when a radial position of one or more brake shoes 6 is detected to deviate from a reference value, the control action includes driving the corresponding actuator 8 to restore the reference value of the radial position, i.e., radially moving the brake shoe 6 until the reference value of the radial position is reached. For example, the monitoring system, particularly the electronic monitoring module 14, is configured to generate a drive signal S3 pointing to one or more of the actuators 8 when a radial position deviation from the reference value is detected, to drive the actuator itself to restore the reference value of the radial position.

[0238] According to another example, monitoring reveals a defect that can be eliminated by intervening in the construction and / or by managing possible maintenance or adjustment interventions, as described below.

[0239] The control action can be defined as signaling or activating maintenance or adjustment interventions at the station or device 101 used to construct the annular tire structure 200 when a detected radial position deviation from a reference value is detected. For example, a monitoring system, particularly an electronic monitoring module 14, is configured to generate a drive signal S3 directed to the control unit 103 of the equipment 100 when a detected radial position deviation from a reference value is detected, to signal or activate maintenance or adjustment interventions at the station or device 101 of the equipment 100. In particular, the control action may include signaling or activating maintenance or adjustment interventions for the clamping ring itself.

[0240] The adjustment intervention of the clamping ring can specify the release of the annular tire structure and perform an adjustment movement opposite to the operation of the closing motion until the brake shoe abuts against the end stop 13.

[0241] The adjustment intervention of the clamping ring can specify the release of the annular tire structure and perform the adjustment movement according to the operation closing motion until the brake shoe abuts against the flange 16 of the adjustment member 15, which is properly inserted into a position coaxial and radially inward relative to the brake shoe 6.

[0242] Preferably, when the detected radial position deviates from the reference value, the control action can be specified to signal or activate an adjustment intervention for the steps of constructing the annular tire structure. For example, the monitoring system, particularly the electronic monitoring module 14, is configured to generate a drive signal S3 directed to the control unit 103 of the equipment 100 when the detected radial position deviates from the reference value, in order to signal or activate an adjustment intervention for the construction steps actuated in the equipment itself.

[0243] Force monitoring can be performed at least during the operation of the closed motion, through which the force exchanged between each brake shoe 6 and the annular tire structure 200 is monitored.

[0244] Specifically, the forces exchanged between each brake shoe 6 and the annular tire structure 200 are detected through mutual interaction.

[0245] The monitoring system is preferably configured to perform this detection via force sensor 12, for example, by sending force signal S2 to electronic monitoring module 14. Alternatively, if each actuator 8 includes an electric motor, the monitoring system can be configured to perform torque control of the electric motor in order to perform force monitoring. Thus, in this case, the action of detecting the force exchanged between each brake shoe 6 and the annular tire structure 200 includes the action of performing torque control of the electric motor.

[0246] The detected exchanged force is compared with at least one reference value. The monitoring system, in particular the electronic monitoring module 14, is configured to perform this comparison.

[0247] The reference value can be an absolute reference value, that is, the specific force that must be exchanged between the interacting brake shoe 6 and the annular tire structure 200.

[0248] The reference value can be a relative reference value, i.e., the force of exchange detected for each brake shoe. In this case, the force of exchange detected for each brake shoe is compared with each other, and each force of exchange detected at one brake shoe defines a reference value for the force of exchange detected at the other brake shoes.

[0249] Preferably, the detected exchange force is compared with absolute and relative reference values.

[0250] According to force monitoring, if the monitoring detects a deviation relative to a reference value, the control action described above is executed. For example, the monitoring system, particularly the electronic monitoring module 14, is configured to generate a drive signal S3 to execute such a control action.

[0251] The control action can be specified to control at least the closed motion of the operation based on force monitoring.

[0252] For example, each brake shoe can be adjusted independently to achieve a defined force and / or each brake shoe can be adjusted independently to maintain synchronization between brake shoes, especially in the step of abutting the annular tire structure.

[0253] Preferably, when the detected exchange force deviates from a reference value, the control action includes driving the actuator 8 to restore the reference value of the exchange force. For example, the monitoring system, particularly the electronic monitoring module 14, is configured to generate a drive signal S3 pointing to one or more of the actuators 8 when the detected exchange force deviates from the reference value, to drive the actuator itself to restore the reference value of the exchange force.

[0254] According to another example, monitoring reveals a defect that can be eliminated by intervening in the construction and / or management of possible maintenance or adjustment interventions, as described below.

[0255] Preferably, when the detected exchange force deviates from a reference value, the control action may specify signaling or activating maintenance or adjustment interventions at the station or device 101 used to construct the annular tire structure 200. For example, the monitoring system, particularly the electronic monitoring module 14, is configured to generate a drive signal S3 directed to the control unit 103 of the equipment 100 when the detected exchange force deviates from the reference value, to signal or activate maintenance or adjustment interventions at the station or device 101 of the equipment 100. In particular, the control action may include signaling or activating maintenance or adjustment interventions for the clamping ring itself.

[0256] The adjustment intervention of the clamping ring can specify the release of the annular tire structure and perform an adjustment movement opposite to the operation of the closing motion until the brake shoe abuts against the end stop 13.

[0257] The adjustment intervention of the clamping ring can specify the release of the annular tire structure and perform the adjustment movement according to the operation closing motion until the brake shoe abuts against the flange 16 of the adjustment member 15, which is properly inserted into a position coaxial and radially inward relative to the brake shoe 6.

[0258] Preferably, when the detected exchange force deviates from the reference value, the control action can be specified to signal or activate an adjustment intervention for the steps of constructing the annular tire structure. For example, the monitoring system, particularly the electronic monitoring module 14, is configured to generate a drive signal S3 directed to the control unit 103 of the equipment 100 when the detected exchange force deviates from the reference value, in order to signal or activate an adjustment intervention for the construction steps actuated in the equipment itself.

[0259] Position monitoring and force monitoring are used to detect the radial contact position of the brake shoe 6 during the approach stroke X1 of the operation closing motion.

[0260] Preferably, at least during the operation of the closing motion, position monitoring is performed to monitor the radial position of each brake shoe 6, and force monitoring is performed to monitor the force exchanged between each brake shoe 6 and the annular tire structure 200.

[0261] Depending on the possible application, the operating device may be a component of the molding machine 400, or operatively associated with it within the equipment 100. Preferably, the operating device is arranged in a fixed position on the molding machine 400.

[0262] The forming machine 400 also includes a mandrel 401, which is arranged coaxially with the clamping ring 1 of the operating device along the forming axis 402.

[0263] Preferably, the forming machine 400 includes a linear guide 403 parallel to the forming axis 402, and the mandrel 401 is axially movable along the linear guide as it approaches and moves away from the clamping ring 1. Preferably, the clamping ring 1 is disposed at one end of the linear guide 403.

[0264] 404 indicates the discharge control mechanism used to discharge raw tires from the forming machine 400.

[0265] The clamping ring 1 is adapted to receive at least one outer sleeve 201 of the tire being processed. The mandrel 401 is adapted to receive the carcass sleeve 202 of the tire being processed. According to a possible embodiment, the mandrel 401 is stably connected to the forming drum 303 and receives only the carcass sleeve 202. Alternatively, the mandrel 401 is configured to receive the forming drum 301 on which the carcass sleeve 202 is disposed. In this case, the forming drum 301 is adapted to operate as the forming drum 303 in the forming machine 400.

[0266] After the carcass sleeve 202 is inserted into a coaxial radially inward position relative to the outer sleeve 201, the clamping ring 1 is adapted to perform a radially outward counteracting function during the forming of the carcass sleeve.

[0267] Preferably, the forming machine 400 includes an adjustment member 15, in which a central shaft 17 is adapted to be mounted on a spindle 401 in order to perform adjustment intervention of the clamping ring 1.

[0268] The following description describes a method for constructing a green tire, including the operation of the equipment 100 of the forming machine 400.

[0269] According to this method, an outer sleeve 201 is constructed on the auxiliary drum 302, and a tire sleeve 202 is constructed on the construction drum 301.

[0270] At the end of the construction, for example by means of the manipulator 105, the auxiliary drum 302 carrying the outer sleeve 201 is arranged coaxially with respect to the clamping ring 1, preferably on the opposite side with respect to the spindle 401. Figure 6 The auxiliary drum 302 supporting the outer sleeve 201 is axially inserted into the clamping ring 1 until the outer sleeve 201 is in a radially inward position relative to the brake shoe 6. The outer sleeve 201 thus represents the annular tire structure 200, and more particularly the first annular tire structure.

[0271] By applying the method described above for manipulating the annular tire structure, the outer sleeve 201 is clamped by the clamping ring 1 via multiple brake shoes 6. In this case, the control action performed based on position monitoring under conditions of engagement or disengagement force monitoring is related to the clamping conditions and / or construction conditions of the outer sleeve.

[0272] Preferably, the provided sequence of actions related to manipulating the outer sleeve 201 may include the following actions:

[0273] - The clamping ring 1 opens while waiting, with the brake shoe 6 positioned in the first radial position.

[0274] - Insert the outer sleeve 201 into the radially inner position coaxial with the brake shoe 6.

[0275] - Actuating actuator 8 to close brake shoe 6, thereby generating the approach stroke X1 of the closure motion.

[0276] - Check the radial position of each brake shoe 6, for example, by reading the encoder of the electric motor.

[0277] - Check the synchronization of the radial positioning of brake shoe 6.

[0278] - Check the force exchanged from the outer sleeve 201 on each brake shoe.

[0279] -Radial closure auxiliary drum 302 and dynamic tracking between brake shoe 6 (tracking stroke X2) and auxiliary drum 302,

[0280] - Lock the brake shoe in the second radial position, wherein the brake shoe retains the outer sleeve 201.

[0281] -Remove auxiliary drum 302.

[0282] Each inspection can reveal the need to adjust the positioning of individual brake shoes, the mutual positioning of brake shoes, or the positioning of the outer sleeve relative to the brake shoes. Each inspection can also reveal existing geometric defects in the outer sleeve, such as dimensional defects and / or shape defects, or it can reveal construction defects in the outer sleeve.

[0283] At the end of the construction process, for example, the carcass sleeve 202 is picked up from the construction drum 301 and positioned on the mandrel 401 of the forming machine 400 by the manipulator 106. Preferably, the carcass sleeve 202 is positioned on the forming drum 303 of the forming machine 400. Alternatively, the carcass sleeve 202 may be arranged on the mandrel 401, remaining connected to the construction drum 301, which performs the function of the forming drum 303 within the forming machine 400.

[0284] The spindle 401 carrying the tire carcass sleeve 202 is axially translated until the tire carcass sleeve 202 is arranged in a radially inward position coaxial with respect to the outer sleeve 201, thereby forming an assembly 203 that defines the second annular tire structure.

[0285] The tire body sleeve 202 is formed inside the outer sleeve 201, while the brake shoe 6 holding the ring 1 is locked in the second radial position and serves as a support for the formation.

[0286] During the forming of the tire body sleeve 202, force monitoring is applied to the second annular tire structure as described above, and the force exchanged between each brake shoe 6 and the second annular tire structure is monitored by the force monitoring.

[0287] In this case, the control actions performed based on force monitoring are related to the forming conditions of the carcass sleeve and / or the construction conditions of the outer sleeve or carcass sleeve.

[0288] Preferably, the provided sequence of actions related to manipulating the tire carcass sleeve 202 and the second annular tire structure may include the following actions:

[0289] - Insert the tire sleeve 202, which is arranged on the forming drum 303, into a radially inner position relative to the outer sleeve 201 and the brake shoe 6, and coaxially.

[0290] - The tire carcass is formed by the mutual axial approach of the tire beads and the simultaneous introduction of pressurized fluid inside the tire carcass.

[0291] - Check the force exchanged from the second annular tire structure on each brake shoe.

[0292] This inspection can reveal defects in the outer sleeve, carcass sleeve, or components formed after the carcass sleeve is formed. Such defects can be dimensional and / or shape defects, construction defects in the outer sleeve and / or inner sleeve, or connection defects between the outer sleeve and inner sleeve.

[0293] At the end of forming, the brake shoe 6 is operated to open in the opposite direction to the closed operation, and the mandrel 401 carrying the second annular structure is translated until it is positioned in the rolling station 102.

[0294] Then, the second annular tire structure is rolled at a position outside the clamping ring 1 to obtain a green tire that defines the third annular tire structure.

[0295] At the end of rolling, the mandrel 401 carrying the raw tire is translated until it is once again positioned radially inward relative to the brake shoe 6.

[0296] By applying the method described above for manipulating the annular tire structure, the raw tire, i.e. the third annular tire structure, is then clamped by multiple brake shoes 6.

[0297] In this case, the control actions performed based on position monitoring under conditions of engagement or disengagement force monitoring are related to the clamping conditions of the raw tire and / or the construction conditions of the raw tire.

[0298] Preferably, the provided sequence of actions related to manipulating the second and third annular tire structures may include the following actions:

[0299] - Activate actuator 8 to open brake shoe 6, thereby generating an operational opening motion.

[0300] Remove the forming drum 303 that supports the second annular tire structure.

[0301] -Rolled second ring tire structure

[0302] - Insert the green tire arranged on the forming drum 303 into a radially inward position relative to the brake shoe 6 and coaxially.

[0303] - Activate actuator 8 to close brake shoe 6, thereby generating an operational closing motion.

[0304] - Check the radial position of each brake shoe 6, for example, by reading the encoder of the electric motor.

[0305] - Check the synchronization of the radial positioning of brake shoe 6.

[0306] - Check the force exchanged from the tire on each brake shoe 6.

[0307] -Discharge pressurized fluid and radially close the forming drum 303.

[0308] - Remove the forming drum 303 while holding the raw tire in the brake shoe 6.

[0309] - The control mechanism was discharged into the raw tire.

[0310] - The raw tires are discharged from the forming machine 400.

[0311] According to the description, the actuating device allows for the elimination of gaps in the positioning of brake shoes encountered by known mechanisms, while maintaining synchronized centripetal movement (and possible centrifugal movement) between the brake shoes.

[0312] The position of each brake shoe 6 can be monitored, especially during the clamping cycle, and the monitoring can also be extended to the transfer and release cycles. This monitoring allows for the control and improvement of tire quality and the management of maintenance / adjustment interventions.

[0313] It can also monitor the forces that actually interact with each brake shoe and the annular tire structure, for example, to check for proper contact.

[0314] It can be checked whether the concentricity between the axis of the clamping ring and the ring tire structure is maintained within the tolerance provided in each cycle. If adjustment intervention of the clamping ring is required, it is sufficient to zero the position of the actuator, especially the electric motor, so that the brake shoe is against the radially outer end stop or pushed against the adjustment member arranged in the fixed position.

Claims

1. A control device for manipulating a ring-shaped tire structure (200), the control device comprising: - Clamping ring (1), the clamping ring comprising: Circular frame (2), Multiple clamping components (5) are mounted on the annular frame (2) and distributed according to the circumferential direction of the annular frame itself. Each of the plurality of clamping members (5) includes a brake shoe (6) movable relative to the annular frame (2) between a plurality of radial positions and having a clamping surface (7) facing the central axis (3) of the clamping ring (1), the clamping surface (7) being intended to contact the radially outer surface (205) of the annular tire structure (200). The clamping surfaces (7) of the plurality of clamping members (5) are arranged along a circumferential direction relative to the central axis (3). Each clamping member (5) includes an actuator (8) inserted between the annular frame (2) and the corresponding brake shoe (6), and configured to generate the operating movement of the brake shoe (6) between the plurality of radial positions independently of other actuators, the operating movement of one brake shoe (6) being independent of the operating movements of the other brake shoes; - A monitoring system configured to perform position monitoring, by means of which the radial position of each brake shoe (6) is monitored during the operational movement of each brake shoe (6).

2. The operating device according to claim 1, wherein, The monitoring system includes a position sensor (9) for each clamping member (5), the position sensor being configured to generate a position signal (S1) indicating the radial position of the corresponding brake shoe (6), and the monitoring system includes at least one electronic monitoring module (14) configured to receive the position signal (S1).

3. The operating device according to claim 2, wherein, The actuator (8) includes an electric shaft (11) and a rotary electric motor (10) associated with the corresponding position sensor (9).

4. The operating device according to any one of claims 1 to 3, wherein, The monitoring system is configured to perform force monitoring, which monitors the force exchanged between each brake shoe (6) and the annular tire structure (200) during the operational movement of each brake shoe (6).

5. The operating device according to claim 4, wherein, The monitoring system includes a force sensor (12) for each clamping member (5), the force sensor being configured to generate a force signal (S2) indicating the force exchanged between each brake shoe (6) and the annular tire structure (200) during the operation movement, the monitoring system including at least one electronic monitoring module (14) configured to receive the force signal (S2).

6. The operating device according to claim 5, wherein, The force sensor (12) is a force sensor that operates under traction or compression.

7. The operating device according to claim 5 or 6, wherein, The force sensor (12) is inserted between the brake shoe (6) and the actuator (8).

8. The operating device according to any one of claims 1 to 3, the operating device comprising brake shoes (6) in a number different from or a multiple or approximation of the number of vulcanizing sections of the vulcanizing mold (104) arranged downstream of the operating device, and / or comprising brake shoes (6) in a number different from or a multiple or approximation of the number of vulcanizing sections of the vulcanizing mold (104) arranged downstream of the operating device, and / or comprising brake shoes (6) in a number different from or a multiple or approximation of the number of construction sections of the drum (300) used for construction.

9. A forming machine (400), the forming machine comprising: The manipulator according to any one of claims 1 to 8, wherein the clamping ring (1) is adapted to receive at least the outer sleeve (201); and the mandrel (401) is adapted to receive the tire body sleeve (202).

10. The forming machine (400) according to claim 9, wherein, The operating device is arranged in a fixed position on the forming machine (400), and the mandrel (401) is axially movable to approach and move away from the clamping ring (1).

11. A method for manipulating a ring-shaped tire structure (200), the method comprising: - A plurality of brake shoes (6) are arranged according to a circumferential direction around a central axis (3), each of the plurality of brake shoes (6) being movable between a plurality of radial positions and having a clamping surface (7) facing the central axis (3), wherein the clamping surface (7) of the plurality of brake shoes (6) is arranged along a circumferential direction relative to the central axis (3), and each brake shoe (6) is arranged in a first radial position suitable for receiving the annular tire structure (200) to be actuated. - The annular tire structure (200) wound around the drum (300) is arranged inside the plurality of brake shoes (6) and coaxial with the central axis (3). Each brake shoe (6) is operated and moved independently to produce an operational closing motion, which, starting from a first radial position, brings the brake shoe (6) to a second radial position, in which the clamping surface (7) contacts and holds the annular tire structure (200). - Perform position monitoring, by which the radial position of each brake shoe (6) is monitored at least during the operational closing movement of each brake shoe (6). - The drum (300) is radially contracted and axially removed from the annular tire structure (200) held by the brake shoe (6).

12. The method for manipulating a ring-shaped tire structure (200) according to claim 11, the method comprising performing a control action based on the position monitoring, the control action comprising one or more of the following: - Control at least the operational closed motion based on the position monitoring. -Signal notification or activation of maintenance or adjustment interventions at the station or device (101) used to construct the annular tire structure (200), - Signal notification or activate the adjustment intervention of the construction steps of the annular tire structure (200).

13. The method for manipulating the annular tire structure (200) according to claim 12, wherein, Performing the position monitoring includes detecting the radial position of each brake shoe (6) at least during the operation closing motion and comparing the detected radial position with at least one reference value.

14. The method for manipulating the annular tire structure (200) according to claim 13, wherein, Performing the position monitoring includes comparing the detected radial positions of the brake shoes (6) with each other, with each detected radial position defining a reference value for the radial positions of the other detected brake shoes (6).

15. The method for manipulating the annular tire structure (200) according to claim 13 or 14, wherein, Controlling at least the operational closing motion includes driving the actuator (8) associated with the brake shoe (6) to restore the reference value of the radial position when the detected radial position deviates from the reference value.

16. The method for manipulating the annular tire structure (200) according to claim 13 or 14, wherein, The control actions include signaling or activating adjustment interventions in the construction steps of the annular tire structure (200) when a detected radial position deviates from a reference value.

17. The method for manipulating the annular tire structure (200) according to claim 13 or 14, wherein, The control actions include signaling or activating maintenance or adjustment interventions at the station or device (101) used to construct the annular tire structure (200) when the detected radial position deviates from the reference value.

18. The method for manipulating a ring-shaped tire structure (200) according to any one of claims 11 to 14, the method comprising: Force monitoring is performed to monitor the forces exchanged between each brake shoe (6) and the annular tire structure (200) at least during the operational closing motion of each brake shoe (6).

19. The method for manipulating a ring-shaped tire structure (200) according to claim 18, the method comprising performing control actions based on the position monitoring and the force monitoring, the control actions comprising one or more of the following: - Control at least the operational closed motion based on the position monitoring and the force monitoring. -Signal notification or activation of maintenance or adjustment interventions at the station or device (101) used to construct the annular tire structure (200), - Signal notification or activate the adjustment intervention of the construction steps of the annular tire structure (200).

20. The method for manipulating the annular tire structure (200) according to claim 19, wherein, Performing the force monitoring includes detecting the force exchanged between each brake shoe (6) and the annular tire structure (200) and comparing the detected exchanged force with at least one reference value.

21. The method for manipulating the annular tire structure (200) according to claim 20, wherein, Performing the force monitoring includes comparing the exchanged forces detected for each brake shoe (6) with each exchanged force detected at a brake shoe (6) to a reference value for the exchanged forces detected at other brake shoes (6).

22. The method for manipulating the annular tire structure (200) according to claim 20 or 21, wherein, Controlling at least the operational closing motion includes actuating the actuator (8) associated with the brake shoe (6) to restore the reference value of the exchange force when the detected exchange force deviates from a reference value.

23. The method for manipulating the annular tire structure (200) according to claim 20 or 21, wherein, The control actions include signaling or activating adjustment interventions in the construction steps of the annular tire structure (200) when the detected exchange force deviates from the reference value.

24. The method for manipulating the annular tire structure (200) according to claim 20 or 21, wherein, The control actions include signaling or activating maintenance or adjustment interventions at the station or device (101) used to construct the annular tire structure (200) when the detected exchange force deviates from the reference value.

25. The method for manipulating a ring-shaped tire structure (200) according to claim 18, the method comprising: - The approach stroke (X1) that performs the closing motion of the operation brings the brake shoe (6) from the first radial position to the radial contact position, where the clamping surface (7) contacts the annular tire structure (200). - The radial contact position of the brake shoe is detected by the position monitoring and the force monitoring. - Simultaneously performing the initial step of the radial contraction of the drum (300) and the tracking stroke (X2) of the operational closing motion, the tracking stroke bringing the brake shoe (6) from the radial contact position to the second radial position, - When the brake shoe (6) is in the second radial position, the operation closing motion is stopped, and the radial contraction of the drum (300) continues until the radial dimension suitable for the drum (300) to be axially removed from the annular tire structure (200) is reached.

26. The method for manipulating the annular tire structure (200) according to claim 17, wherein, The control actions include signaling or activating maintenance or adjustment interventions for the clamping ring (1) comprising the plurality of brake shoes (6).

27. The method for manipulating the annular tire structure (200) according to claim 24, wherein, The control actions include signaling or activating maintenance or adjustment interventions for the clamping ring (1) comprising the plurality of brake shoes (6).

28. A method for constructing a green tire, the method comprising: - Construct a body sleeve (202) on the construction drum (301), - Construct an outer sleeve (201) on the auxiliary drum (302), -The outer sleeve (201) is clamped by means of a plurality of brake shoes (6) of a clamping ring (1) of a forming machine (400) by applying the method for manipulating the annular tire structure according to any one of claims 11 to 27, wherein the outer sleeve (201) defines the first annular tire structure. - The tire body sleeve (202) is formed inside the outer sleeve (201) by connecting the tire body sleeve and the outer sleeve to each other.

29. The method for constructing a green tire according to claim 28, the method comprising performing control actions based on the position monitoring, the control actions being related to the clamping conditions of the outer sleeve (201) and / or the construction conditions of the outer sleeve (201).

30. The method for constructing a green tire according to claim 28, comprising applying the method for manipulating a ring tire structure according to any one of claims 18 to 25 to the outer sleeve (201), including performing control actions based on the position monitoring and the force monitoring, the control actions being related to the clamping conditions of the outer sleeve (201) and / or the construction conditions of the outer sleeve (201).

31. The method for constructing a green tire according to claim 28, 29 or 30, the method comprising: - The carcass sleeve (202) is arranged on the mandrel (401) of the forming machine (400), coaxial with respect to the outer sleeve (201) and in a radially inward position, wherein the assembly (203) consisting of the carcass sleeve (202) arranged inside the outer sleeve (201) defines a second annular tire structure. - The tire body sleeve (202) is formed inside the outer sleeve (201), while the brake shoe (6) of the clamping ring (1) is locked in the second radial position and serves as a support for the formation.

32. The method for constructing a green tire according to claim 31, the method comprising: The method for manipulating a ring tire structure according to any one of claims 18 to 25 is applied to the second ring tire structure; The forces exchanged between each brake shoe (6) and the second annular tire structure are monitored during the forming of the tire body sleeve (202).

33. The method for constructing a tire according to claim 32, the method comprising performing control actions based on the position monitoring and the force monitoring, the control actions being related to the forming conditions of the tire carcass sleeve (202) and / or the construction conditions of the outer sleeve (201) or the tire carcass sleeve (202).

34. The method for constructing a green tire according to claim 31, the method comprising: - The second annular tire structure is rolled outside the clamping ring (1) to obtain a green tire. -The raw tire is held by means of the plurality of brake shoes (6) by applying the method for manipulating the annular tire structure according to any one of claims 11 to 27, wherein the raw tire defines a third annular tire structure.

35. The method for constructing a green tire according to claim 34, the method comprising performing control actions based on the position monitoring, the control actions being related to the clamping conditions of the green tire and / or the construction conditions of the green tire.

36. The method for constructing a green tire according to claim 34, comprising applying the method for manipulating a ring-shaped tire structure according to any one of claims 18 to 25 to the green tire, including performing control actions based on the position monitoring and the force monitoring, the control actions being related to the clamping conditions of the green tire and / or the construction conditions of the green tire.

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