Apparatus and process for building a green tyre for a bicycle

Abstract

An apparatus for building a green tyre (100) for a bicycle, said apparatus comprising: a building drum (2) rotating about a main rotation axis (A) located at a predetermined first height (Q1); a feeding group (4) for feeding at least one carcass ply (103) towards the building drum (2), above a top portion (3) of the building drum (2); and a first feeding line (5) configured for feeding a first insert (106) towards a first point-fixing segment (2f) of the building drum (2), wherein the first point-fixing segment (2f) is located at a height lower than or equal to said predetermined first height (Q1).

Description

Technical Field

[0001] This invention relates to an apparatus and process for constructing raw tires for bicycles. Background Technology

[0002] The construction of bicycle tires typically involves applying one or more carcass plies around the outer surface of the build drum in a cylindrical configuration. Each of a pair of bead cores is fitted or applied around one of the axially opposite end flaps of the carcass plies. The end flaps are then folded up around the respective bead cores. A tread strip, made of appropriately sized elastomeric material in strip form, is then applied and wound around the carcass plies laid against the build drum, positioning it axially centered relative to the bead cores.

[0003] At the end of the winding, the opposite ends of the tread strips slightly overlap and are connected to each other through a head-to-head joint.

[0004] Throughout the entire construction process, including the application of the tread belt, the axial distance between the bead cores remains constant. This aspect of the process highlights a key characteristic that distinguishes tires for bicycles from those for motor vehicles. In practice, for motor vehicle tires, a step of bringing the bead cores closer together is typically prescribed to allow the tire carcass structure to be shaped according to a toroidal configuration during connection with a belt structure having a diameter larger than that of the bead cores.

[0005] After construction is complete, the constructed green tire for bicycle is removed from the drum and transferred to a vulcanizing press for molding and vulcanization, which are designed to determine structural stability and, if possible, impart the desired tread pattern on the tread belt through the crosslinking of the elastomeric material present therein.

[0006] "Insertion" refers to an elongated element or strip made of an elastomeric material. Preferably, the strip is cut to an appropriate size. It should be noted that the strip may include one or more metal, fabric, or composite cords arranged parallel to each other and in accordance with the longitudinal direction of the strip.

[0007] The term "semi-finished product" will be used to define an element that is provided with inserts (in the form of an operating strip that has not yet been cut to the appropriate size) and a service strip.

[0008] "Elastomer material" refers to a composition comprising at least one elastomeric polymer and at least one reinforcing filler. Preferably, such a composition also includes additives, such as crosslinking agents and / or plasticizers. Due to the presence of the crosslinking agent, the material can be crosslinked by heating to form the final finished product.

[0009] "Carcass structure" is intended to define a collection of carcass plies formed by or having at least one carcass ply having parallel cords bonded in an elastomeric matrix; thus, this expression defines the carcass structure in any of its construction steps, from a single carcass ply to more advanced steps, in which additional components, such as bead cores, inserts, or additional carcass plies, are added to the carcass plies.

[0010] The terms “fixed-point positioning” and “fixed-point positioning” will be used to identify a step in which the front end of the insert (or the front end of the semi-finished product) is initially fixed or pressed onto the carcass structure in the initial step of the application and winding of the reinforcing insert.

[0011] The term “automation” will be used to define the execution of processes and movements by mechanical or electromechanical components managed by a control unit, with no manual intervention (or minimal / residual) required from the operator for the completion of the processes and movements.

[0012] The terms “radial” and “axial”, as well as the expressions “radial inside / outside” and “axial inside / outside”, are used with reference to the axis of rotation of the component, particularly with reference to the main axis of rotation of the building drum or finished tire.

[0013] The terms “circumferential” and “circumferentially” are used alternatively to refer to the annular extension of a component, particularly to the annular extension of a building drum or rolling element (e.g., a roller or small roller).

[0014] The terms “low,” “below,” “below,” or “under,” and “high,” “above,” or “above,” are used to indicate the relative position of one element with respect to another and / or one element with respect to the ground (or horizontal support plane).

[0015] "Top portion" refers to the corner segment of the construction drum, which at any given time defines the drum portion furthest from the horizontal support plane (or the ground). Preferably, the top portion is defined by the corner segment whose angle bisector is defined by a vertical plane passing through the main axis of rotation of the construction drum and whose width is less than 120°, more preferably less than 90°.

[0016] For example, in the video clip https: / / youtu.be / e3sHyJKaFMo?t=879 (timing from 14'37'' to 15'50'' - last viewed on December 17, 2022), the sequential laying of the carcass ply, bead core, sidewall reinforcement, bead reinforcement, and tread strip can be seen to build a bicycle tire on the build drum. Each of these components is obtained synchronously with the laying of a semi-finished product in the form of a continuous strip from the corresponding feed group, which guides the semi-finished product to a position immediately adjacent to the application point on the build drum, where the operator performs the necessary operations to apply the semi-finished product. The application procedure for each component involves manually securing the head end of the corresponding semi-finished product to the laying surface of the drum, after which the drum is rotated one or more times about its axis of rotation to determine the circumferential winding of the semi-finished product around the laying surface. For certain components, such as, for example, carcass ply, sidewall reinforcements, bead reinforcements, and tread belts, operators are required to manually apply the semi-finished and / or build drums during winding to facilitate proper distribution and application of the material.

[0017] For sidewall reinforcements, operators are also required to manually guide the semi-finished product for proper alignment and manually control its tension.

[0018] At the end of each component winding, the drum stops rotating and the operator must manually cut the semi-finished product and attach the tail end of the obtained component to the head end that has been previously applied to the laying surface.

[0019] DE102019131336 describes the use of an applicator trolley located in an operator-accessible front area above a drum, in which the operator can interact with the trolley to pick up, position, or cut inserts required to build a given tire.

[0020] Therefore, at the current level of technology, even with the assistance of automatic or semi-automatic systems for feeding semi-finished products, the operation of assembling components on the build drum requires specialized labor to ensure the correct positioning, distribution, tensioning, and / or cutting of the semi-finished products to the appropriate size for the purpose of manufacturing components on the build drum.

[0021] Reduced automation can lead to lower processing accuracy, poor repeatability, and limited production capacity.

[0022] Therefore, the applicant has proposed improving the level of precision, repeatability, and / or productivity of the process for manufacturing tires for bicycles. The applicant has also found that machines and methods typically used to manufacture tires for motor vehicles (e.g., automobiles and / or motorcycles) are highly automated but unsuitable for manufacturing tires for bicycles. In fact, the operation of manufacturing tires for bicycles requires the preparation and manipulation of extremely delicate and precise finished products. Many components (e.g., liner, carcass ply, and other fabric reinforcement structures) can have thicknesses between 0.1 mm and 1 mm, while their width can reach and exceed 450 mm. Additionally, components made of elastomeric materials (e.g., liner) can have thicknesses within the aforementioned range, for example, less than 0.5 mm, but widths greater than 120 mm. These dimensional characteristics almost always result in the semi-finished products lacking sufficient structural strength to allow for proper manipulation of the machines typically used to manufacture tires for motorcycles or automobiles.

[0023] Because the inserts and fabric layers are smaller and lighter, most of the additional components are positioned and cut to the appropriate size with human intervention, which obviously involves several key features related to worker safety.

[0024] However, the applicant has pointed out that in the devices known to date, due to the technical difficulties of fixed-point positioning (also determined by positioning and size reasons), it is difficult to automatically apply certain components.

[0025] The type of material being processed makes it quite complex to perform the positioning of the insert by releasing it from above without operator intervention.

[0026] While solutions similar to the DE102019131336 offer an interesting starting point for inserts that are continuously applied but still connected to the service band, the range of solutions available on the market for applying inserts pre-cut to the appropriate size is rather limited.

[0027] This situation contrasts sharply with the development of the bicycle industry, where tires are becoming increasingly complex, requiring a wide variety of inserts, making it impossible to use solutions typically used for building tires for cars or motorcycles; in fact, the inserts are much smaller and less rigid, which means that the insert cannot be released far from the build drum, but must be guided (especially manually) near a fixed positioning area. Summary of the Invention

[0028] Therefore, the applicant has come to believe that proper use of the space around the drum can be key to realizing a device capable of automating a large number of builds.

[0029] The applicant has ultimately discovered that using an applicator device located at or below the height of the drum's axis of rotation and preferably in a position opposite to the operator's proximity area allows for a system for applying pre-cut inserts to the device, which can be used to perform a series of processes that can be actuated in an automated manner.

[0030] According to a first aspect, the present invention relates to an apparatus for constructing raw tires for bicycles.

[0031] Preferably, the construction drum is specified to rotate about a main rotation axis located at a predetermined first height relative to the horizontal support plane.

[0032] Preferably, a feed group is provided for feeding at least one carcass ply toward the building drum.

[0033] Preferably, the feed assembly is provided with at least one section for releasing the tire carcass ply, the section being located above the top portion of the build drum.

[0034] Preferably, a first feed line is provided, the first feed line being configured to feed at least one first semi-finished product, including a first insert, toward a first positioning section of the build drum.

[0035] Preferably, the first feed line includes a first applicator device.

[0036] Preferably, the first applicator device is located below the top portion of the build drum.

[0037] Preferably, the first applicator device is movable between a first position away from the build drum and a second position close to the build drum to approach and move away from the build drum.

[0038] Preferably, the first fixed-point positioning section is located at a height lower than or equal to the predetermined first height.

[0039] The applicant has pointed out that placing the first positioning section below the height of the rotation axis allows the use of the device in its usual free area and automatically positions the insert.

[0040] According to a second aspect, the present invention relates to a process for constructing raw tires for bicycles.

[0041] Preferably, the build drum is arranged to rotate about a main axis of rotation located at a predetermined first height relative to the horizontal support plane. Preferably, the carcass ply is fed toward the build drum.

[0042] Preferably, this feed begins from a release zone located at a higher height relative to the horizontal support plane and continues until the top portion of the construction drum is formed.

[0043] Preferably, the end portion of the tire carcass ply is fixed to the construction drum.

[0044] Preferably, a first rotation is given to the build drum in order to wind the carcass ply onto the build drum.

[0045] Preferably, the first insert is fed toward the first fixed-point positioning section of the construction drum.

[0046] Preferably, the first insert is wound around the construction drum.

[0047] Preferably, the first fixed-point positioning section is located at a height lower than or equal to the predetermined first height.

[0048] In at least one of the foregoing aspects, the present invention includes one or more of the following preferred features described below.

[0049] Preferably, the main rotation axis of the construction drum is located within a horizontal section, which divides the construction drum into an upper half and a lower half, the upper half and the lower half being located on the far side and near side of the horizontal support plane, respectively.

[0050] Preferably, the first fixed-point positioning section is located in the lower half.

[0051] Preferably, at least one second feed line is provided, the second feed line being configured to dispense at least one second semi-finished product, including a second insert, toward a second positioning section of the build drum.

[0052] Preferably, the second feed line includes a second applicator device.

[0053] Preferably, the second applicator device is located above the top portion of the build drum.

[0054] Advantageously, in this way, the volume of the device is significantly reduced, thereby allowing for the application of thinner reinforcements in the upper part of the drum and thicker inserts, such as wire coil overlays and sidewall reinforcements, in the lower part.

[0055] Preferably, the second fixed-point positioning section is located at a height greater than the predetermined first height and close to the top portion.

[0056] Preferably, the main axis of rotation of the construction drum is located within a vertical section that divides the construction drum into a front half and a rear half, and the operator can access the front half.

[0057] Preferably, the feed group is located at a position far from the front half relative to the rear half.

[0058] Preferably, the first feed line is located away from the front half relative to the rear half.

[0059] Preferably, the first fixed-point positioning section is located in the latter half.

[0060] Preferably, the second fixed-point positioning section is located in the first half of the structure.

[0061] Advantageously, this layout allows for maximum utilization of the space located radially outward relative to the build drum, while also providing sufficient frontal accessibility for possible manual operation by the operator.

[0062] Preferably, the first applicator device includes a carrier that is movable between the first position and the second position to approach and move away from the build drum.

[0063] Preferably, the first applicator device includes a positioning element connected to the carrier and resiliently movable along the positioning direction and away from the build drum.

[0064] Advantageously, the presence of a rigid movable carrier and movable positioning element allows for automatic positioning (i.e., fixing) of the insert without the risk of damaging the material.

[0065] Preferably, the positioning element includes a pusher slider with an application surface.

[0066] Preferably, in the second position of the first applicator device, the applicating surface is oriented tangentially to the first fixed-point positioning section.

[0067] Preferably, the positioning direction has an orientation between the horizontal direction and the radial direction incident on the first positioning section.

[0068] This allows for efficient and autonomous adjustment of the pushing action during the positioning and closing of the insert.

[0069] Preferably, the positioning direction is parallel to the movement direction of the first applicator device between the first position and the second position.

[0070] More preferably, the two directions are parallel and aligned to facilitate the construction of the component and reduce lateral stress.

[0071] Preferably, the first applicator device includes a movable conveyor belt that starts from the feed area of ​​the first insert along the conveying direction.

[0072] Preferably, the conveyor belt is slidably associated with the positioning element and inserted between the positioning element and the build drum.

[0073] Preferably, the conveyor belt can slide along the applied surface of the pushing slider.

[0074] Preferably, the first applicator device includes a moving assembly for moving the conveyor belt, the moving assembly being provided with pulleys or transmission elements arranged along the movement path of the conveyor belt.

[0075] Preferably, the positioning element is inserted between two successive pulleys or transmission elements, which define a deformable application section of the conveyor belt.

[0076] This allows the conveyor belt to adapt to the shape of the build drum, thus helping to improve the accuracy of point positioning.

[0077] Preferably, the conveyor belt has a conveying surface opposite to the toothed traction surface.

[0078] Therefore, sliding is minimized, thereby improving the motion accuracy and positioning accuracy of the first insert.

[0079] Preferably, the carrier of the first applicator device includes a frame having a curved end edge located at the locator element.

[0080] Preferably, the end edge has a curvature that complements the curvature of the radial outer surface of the building drum.

[0081] Preferably, the device includes a control unit configured to stop the first rotation of the build drum about the main rotation axis.

[0082] Preferably, the control unit is configured to impart a first movement to the first applicator device from a first position to a second position in order to secure the first end of the first insert to the carcass ply.

[0083] Preferably, the control unit is configured to impart a second movement to the first applicator device in the direction from the second position to the first position, up to a removed position from the build drum.

[0084] Preferably, the control unit is configured to initiate a second rotation of the build drum about the main rotation axis in order to wind the first insert around the carcass ply.

[0085] Preferably, the control unit is configured to impart a third movement to the first applicator device from a removed position to a second position in order to secure the second end of the first insert to the first end of the first insert.

[0086] The applicant has confirmed that this movement allows for automated positioning of the first insert without negatively impacting the accuracy and quality applied.

[0087] Preferably, the control unit is configured to impart a fourth movement from the second position to the first position to the first applicator device after the second end has been secured to the first end of the first insert.

[0088] Preferably, the control unit is configured to initiate a second rotation of the build drum about the main rotation axis between the first movement and the second movement.

[0089] This allows the pressing action of the positioning element and the rotation of the drum to occur simultaneously within a short time interval, thus facilitating a wider distribution of positioning actions.

[0090] Preferably, the control unit is configured to stop the second rotation after the third motion has ended.

[0091] This allows the pressing action of the locator element to occur simultaneously with the rotation of the drum within a short time interval, thus facilitating a wider distribution of the closing action.

[0092] Preferably, the control unit is configured to activate the feed group in order to secure the end portions of the carcass ply to the build drum.

[0093] Preferably, the control unit is configured to initiate the first rotation of the build drum in order to wind the carcass ply onto the build drum.

[0094] Preferably, the first and second rotations of the construction drum are performed in a reverse rotation manner.

[0095] Preferably, the first feed line includes a first feed station configured to feed the first insert to the first applicator device and cut the first insert to an appropriate size.

[0096] Preferably, the first feed station includes a loading group having at least one reel shaped to receive the first semi-finished product wound in a roll and configured to unwind the roll and advance the first semi-finished product along a first feed direction, the first semi-finished product including a first operating belt.

[0097] Preferably, the first feed station includes a cutting group located downstream of the loading group.

[0098] Preferably, the cutting assembly is provided with a cutting member configured to pre-cut the operating strip of the first semi-finished product into discrete portions of predetermined length.

[0099] Preferably, each discrete portion of the first operating band defines the first insert cut to an appropriate size.

[0100] Advantageously, the second feed line is therefore configured to dispense inserts cut to the appropriate size.

[0101] Preferably, the first semi-finished product includes the interconnected operation belt and service belt.

[0102] Preferably, the loading assembly includes a separation member configured to separate the operating belt from the service belt of the first semi-finished product.

[0103] Preferably, the cutting assembly includes a measuring member configured to detect the length of an end segment of the first operating band, the end segment being downstream of the cutting member relative to the feed direction.

[0104] This ensures that the size of the insert corresponds to the predetermined size, except for possible slippage and / or shrinkage of the material.

[0105] Preferably, the measuring component includes a sensor element associated with the conveyor belt of the first applicator device and the sensor element is configured to generate an activation signal when the end section of the first operating belt reaches the predetermined length.

[0106] Preferably, the cutting assembly includes a control unit configured to stop loading the assembly and activate the cutting member upon receiving the activation signal from the sensor element.

[0107] Decoupling between the feed assembly and the applicator device allows the necessary movements of the insert to be performed during the machine cycle's downtime, preparing the insert for application and thus reducing cycle time.

[0108] Preferably, the control unit is configured to also stop the conveyor belt of the first applicator device when the activation signal of the sensor element is received.

[0109] Preferably, the device includes two parallel and side-by-side first feed lines.

[0110] Preferably, each first feed line includes a first applicator device and a corresponding feed station.

[0111] This completely frees up both application lines, thus facilitating the maintenance and setup of each application line without compromising the functionality of the other application line.

[0112] Preferably, the first applicator devices of the two first feed lines are capable of moving closer to and further apart along an adjustment direction orthogonal to the conveying direction of the first insert and parallel to the main rotation axis of the build drum.

[0113] Therefore, the device is highly flexible and adaptable to different tire sizes. Furthermore, the use of a movable applicator device positioned downstream of a fixed feed station greatly simplifies the implementation of the device, reduces the complexity of the actuator, and maintains the easy accessibility of the material replacement area (which remains external).

[0114] Preferably, the device includes an adjustment member associated with each first applicator device and configured to move the respective first applicator device along the adjustment direction between a loading position aligned with the feed direction and a release position misaligned with the feed direction and approaching another first applicator device.

[0115] Preferably, each adjusting component includes an actuator and a guide.

[0116] Preferably, the carrier of the first applicator device is slidably associated with the guide and connected to the actuator for movement along the adjustment direction.

[0117] Preferably, the control unit is configured to impart movement from the loading position to the actuator of the adjusting member after the cutting member is activated.

[0118] Preferably, at least one second insert is positioned toward the second fixed-point positioning section of the construction drum.

[0119] Preferably, the second insert is fixed at the second fixed-point positioning section and wrapped around the construction drum.

[0120] Preferably, the second fixed-point positioning section is located at the top portion of the construction drum.

[0121] Preferably, the second fixed-point positioning section is located in the front half of the construction drum.

[0122] This configuration allows for maximum utilization of the space around the drum, thus facilitating the automation of the operation.

[0123] Preferably, feeding and winding the first insert includes moving the first end of the first insert from a first position away from the build drum to a second position close to the build drum.

[0124] Preferably, feeding and winding the first insert includes fixing the first end of the first insert onto the tire carcass ply at the first fixed positioning section by applying a first pressure to press the first insert onto the tire carcass ply.

[0125] Preferably, feeding and winding the first insert includes imparting a second rotation to the build drum for winding the first insert around the build drum, wherein the second rotation is opposite to the first rotation.

[0126] Advantageously, this facilitates the application of the first insert to the lower and rear regions of the build drum.

[0127] Preferably, the application of the first pressure and the second rotating part are performed simultaneously.

[0128] Preferably, feeding and winding the first insert includes applying a second pressure to press the second end onto the first end of the first insert when the build drum has completed or is nearly completed rotating along the second rotation, thereby securing the second end of the first insert onto the first end of the first insert.

[0129] Preferably, the application of the second pressure and the second rotation are performed simultaneously. This optimizes the retention of the insert during closure.

[0130] Preferably, feeding and winding the first insert includes interrupting the second rotation during the application of the second pressure.

[0131] Preferably, feeding and winding the first insert includes advancing a first operating belt along the feed direction.

[0132] Preferably, feeding and winding the first insert includes cutting the first operating strip into discrete portions of predetermined length, wherein each discrete portion defines the first insert.

[0133] Preferably, feeding and winding the first insert includes arranging a first semi-finished product, the first semi-finished product including a first service belt coupled to the first operating belt.

[0134] Preferably, feeding and winding the first insert includes separating the first service strip from the first operating strip.

[0135] Preferably, the two first inserts are arranged so that they are oriented parallel to each other and placed at a predetermined first distance, which is parallel to the main axis of rotation.

[0136] Preferably, the two first inserts are brought closer together along an adjustment direction parallel to the main rotation axis of the construction drum until a predetermined second distance is reached.

[0137] Preferably, the two first inserts are fed parallel to each other toward the first fixed-point positioning section of the construction drum.

[0138] Preferably, the first insert is wound in parallel around the construction drum.

[0139] Preferably, the approach of the two first inserts is performed after the corresponding first operating band is cut.

[0140] Preferably, the thickness of the first insert is less than 1 mm, and more preferably between 0.2 mm and 0.8 mm.

[0141] Preferably, the first insert extends between its first end and second end along its conveying direction and has a width orthogonal to the conveying direction, the width being between 10 mm and 120 mm, more preferably between 25 mm and 110 mm.

[0142] Preferably, the first insert extends between a first end and a second end along its conveying direction, and both the first end and the second end are provided with end edges inclined at an angle between 30° and 60°, preferably 45°, relative to the conveying direction.

[0143] Preferably, the feeding and winding of the first insert into the tire carcass ply occurs immediately downstream of the winding of the ply on the construction drum.

[0144] Preferably, fixing and winding the second insert at the second fixed positioning section of the building drum specifies that two annular bead cores are positioned and wound on the carcass ply, the two annular bead cores being parallel to each other and arranged such that lateral end flaps extend from each bead core beyond and away from the other bead core.

[0145] Preferably, the process includes flipping up each lateral end flap of the carcass ply around the corresponding bead core.

[0146] Preferably, the feeding and winding of the first insert is performed after the lateral flap is flipped up. Attached Figure Description

[0147] Further features and advantages will become clearer from the detailed description of preferred, but non-exclusive, embodiments of the apparatus and method according to the invention for constructing raw tires for bicycles. Such a description will be made below with reference to the accompanying drawings, which are provided by way of non-limiting example only, in which:

[0148] - Figure 1 A schematic side view of an apparatus for constructing a raw tire for a bicycle, according to the present invention, is shown.

[0149] - Figure 1a It shows Figure 1 Enlarged view of the details;

[0150] - Figure 2 and Figure 3 It shows Figure 1 Front and rear perspective views of a portion of the equipment;

[0151] - Figure 4 and Figure 5 It shows two different operating positions. Figure 1 A floor plan of the equipment;

[0152] - Figures 6 to 13 schematically shown Figure 1 Several movements of the equipment;

[0153] - Figure 14 A schematic structure for a bicycle tire is shown;

[0154] - Figure 15 The structure of the first semi-finished product used in the processing according to the present invention is illustrated schematically. Detailed Implementation

[0155] Referring to the accompanying drawings, reference numeral 1 indicates a device for constructing tires for bicycles.

[0156] This invention is intended for use in processing Figure 14 The illustrative example type is a tire 100 for bicycles, such as tires used on road bikes, track bikes, mountain bikes, e-bikes, etc.

[0157] The following can be identified in tire 100: a radially inner surface 101a that is substantially facing the geometric axis of rotation of tire 100 and a radially outer surface 101b that is substantially opposite to the geometric axis of rotation.

[0158] A tire 100 for a bicycle has a carcass structure 102, the carcass structure including at least one carcass ply 103 having cords that are parallel to each other and bonded to an elastomeric matrix.

[0159] One or more carcass ply 103 have axially opposite end flaps 103a that engage with a corresponding bead core 104, i.e., an anchoring ring structure integrated in the area typically identified by the name "bead", so that the tire 100 in use is mechanically engaged with the corresponding mounting rim at the bead.

[0160] A tread band 105 made of an elastomeric material is applied at a radially outer position relative to the carcass structure 102.

[0161] During the construction of tire 100, reinforcing inserts are typically applied to tire carcass structure 102, and such reinforcing inserts can be applied and positioned at different steps of construction depending on their function and construction scheme.

[0162] Such inserts with different properties and / or functions can be used to reinforce the bead (bead wrap, bead wrap), sidewall area (sidewall reinforcement), tread application area (buffer layer, rubber base), carcass structure (bead-to-bead layer) or inner curvature of the tire (liner).

[0163] The dimensions of all inserts are very limited, with the thickness preferably less than 2 mm, mostly less than 1 mm, and preferably between 0.2 mm and 0.8 mm.

[0164] Conversely, the width of the insert has considerable variability, preferably ranging from 30 mm to 100 mm.

[0165] It should also be noted that, depending on the type of insert, the insert can be applied continuously and then cut after application, or cut to the appropriate size in a step before application.

[0166] The tire 100 preferably includes a first insert 106 and a second insert 107.

[0167] The first insert 106 is preferably pre-cut to a suitable size (i.e., cut / determined before being applied to the carcass structure 102) and has a very reduced thickness (less than 1 mm, preferably less than 0.8 mm) and a non-negligible width, which is preferably between 30 mm and 100 mm.

[0168] An example of this first insert 106 is a wire loop wrapped with fabric and a sidewall reinforcement.

[0169] The tire 100 also includes a second insert 107, which is preferably of the type that applies a post-cut.

[0170] An example of such a second insert is the bead core 104, filler 112, buffer layer, rubber base, and liner. Figure 14 As an example, the following components are schematically shown: carcass ply 103, bead core 104, bead wrap 106, bead wrap 107, tread belt 105, filler 112, and bead-to-bead layer 113. The illustration depends on the desired tire design and may not include any components. For example, in other structural designs not shown, sidewall reinforcements are present, but the bead-to-bead layer, filler, and bead wrap are absent.

[0171] Preferably, furthermore, on the radially outer surface 101b of the tire 100 for bicycles, a portion of the carcass ply 103 directly exposed to the external environment can be identified between the axially outer edge of the tread belt 105 and the bead core 104. The tire 100 for bicycles typically lacks sidewalls, i.e., elastomeric material layers laterally applied to the outside of the carcass structure 102, each of which extends between one of the bead and the corresponding axially outer edge of the tread belt.

[0172] Therefore, the tire 100 is constructed using a device 1 configured to apply the various components onto the construction drum 2 in order to obtain a predetermined construction scheme.

[0173] The drum 2 preferably has a generally cylindrical shape and therefore includes an outer surface 2a or outer arc surface extending around its main axis of rotation "A".

[0174] The main rotation axis “A” is located at a predetermined first height “Q1” relative to the horizontal support plane “G”.

[0175] Preferably, the construction drum 2 is provided with a rotation axis (not shown) that is coaxial with the main rotation axis "A" and integral with the construction drum itself, so as to rotate the drum.

[0176] It is worth noting that the main rotation axis "A" is located in both the horizontal section (not shown) and the vertical section (not shown).

[0177] Preferably, the horizontal cross-section divides the construction drum 2 into an upper half 2b and a lower half 2c, the upper half and the lower half being located on the far side and near side respectively relative to the horizontal support plane "G".

[0178] Therefore, the upper part 2b includes the top part 3 that constitutes the drum 2.

[0179] Preferably, the vertical section divides the construction drum 2 into a front half 2d and a rear half 2e, which the operator can access.

[0180] The terms “front” and “rear” are used to refer to the areas used for picking up the constructed tire 100, wherein the front area is preferably accessible to the operator as described above, while the rear area is partially obscured by the construction drum 2.

[0181] Preferably, a feed group 4 is provided for feeding at least one carcass ply 103 toward the building drum 2.

[0182] The feed group 4 (which will not be described in detail) is provided with at least one release section 4a for releasing the carcass ply 103, the release section preferably being located above the top portion 3 of the building drum 2.

[0183] Preferably, it should be noted that the feed group 4 is located at a position away from the front half 2d relative to the rear half 2e of the construction drum 2.

[0184] In other words, preferably, the feed group 4 is located at the rear of the building drum 2 and is configured to feed the carcass ply 103 in a direction oriented toward the front portion 2d.

[0185] The device 1 also includes a first feed line 5, which is configured to feed at least one first semi-finished product 108, including a first insert 106, toward a first positioning section 2f of the build drum 2.

[0186] Preferably, the semi-finished product 108 is wound in the form of a roll 108a on a rotatable first spool 15a, thereby allowing it to be unwound.

[0187] Preferably, it should be noted that the semi-finished product includes a first operating belt 109a and a first service belt 109b connected together.

[0188] The first service belt 109b is strip-shaped and connected to the first operating belt 109a, serving to protect and control dimensions.

[0189] Preferably, the first service belt 109b and the first operation belt 109a are longitudinally connected.

[0190] It should be noted that the first operation band 109a defines the first insert 106 mentioned above.

[0191] Specifically, the first operating strip 109a comprises a continuous strip of material having the dimensional characteristics of the first insert 106 described above.

[0192] Preferably, once the first operating band 109a is divided into discrete portions of a predetermined length, each discrete portion defines a corresponding first insert 106.

[0193] Therefore, the first insert 106 preferably extends between a first end 106a and a second end 106b, the first end and the second end being longitudinally spaced from the extension of the first insert itself 106 along their main extension direction.

[0194] The first operating band 109a (and therefore the first insert 106) is preferably made of an elastomeric material. Furthermore, the first service band 109b is preferably made of polyethylene.

[0195] It should be noted that, depending on the type of the first insert 106 applied, the first feed line 5 can be configured to apply the first insert 106 to a single (first) carcass ply 103 wound around the build drum 2, or to a structure defined by one or more carcass ply 103 that have been previously turned up.

[0196] Preferably, the first feed line 5 includes a first feed station 6 for the first insert 106 and a first applicator device 7, the first applicator device being configured to position and apply the first insert 106 onto the carcass ply 103 arranged around the build drum 2.

[0197] Preferably, the applicator device 7 is located below the top portion 3 of the construction drum 2.

[0198] Therefore, preferably, the applicator device 7 is arranged below the feed group 4 of the carcass ply 103.

[0199] Furthermore, preferably, the applicator device 7 can move between a first position away from the build drum 2 and a second position close to the build drum 2 to approach and move away from the build drum 2.

[0200] According to one aspect of the invention, the first fixed-point positioning section 2f is located at a height lower than or equal to a predetermined first height "Q1".

[0201] In other words, the first fixed-point positioning section 2f is located at the same height as or below the main rotation axis "A" of the building drum 2.

[0202] Therefore, preferably, the first fixed-point positioning section 2f is located in the lower half 2c of the construction drum.

[0203] Furthermore, preferably, the applicator device 7 is located away from the front half 2b relative to the rear half 2c of the construction drum 2.

[0204] In other words, preferably, the applicator device 7 is located at the rear of the build drum 2 and is configured to feed the first insert 106 along a conveying direction “B” oriented toward the front portion 2b.

[0205] Therefore, preferably, both the feed group 4 and the first applicator device 7 are located at the rear of the build drum 2, wherein the feed group 4 is located above the top portion 3, and the first applicator device 7 is configured to position the first insert 106 at a fixed point below the first height "Q1".

[0206] More preferably, the first applicator device 7 is configured to position the first insert 106 in one-quarter of the build drum 2, the one-quarter being contained in both the lower half 2c and the rear half 2e.

[0207] In fact, the applicant has detected that placing the first fixed-point positioning area 2f below the main rotation axis "A" allows the use of the device in its usual free area and automatically positions the insert.

[0208] Furthermore, preferably, the device 1 includes at least one second feed line 8, which is configured to dispense at least one second semi-finished product 110, including a second insert 107, toward a second positioning segment 2g of the build drum 2.

[0209] Preferably, the second semi-finished product 110 is also wound in a roll onto a corresponding rotatable spool 8a, which allows it to be unwound.

[0210] It is worth noting that, depending on the type of the second insert 107 applied, the second feed line 8 can be configured to apply the second insert 107 to a single (first) carcass ply 103 applied to the build drum 2 or to a structure defined by one or more previously flipped carcass ply 103.

[0211] Preferably, the second feed line 8 includes a second applicator device 9 located above the top portion 3 of the build drum 2.

[0212] Therefore, in a preferred embodiment, the feed assembly 4 and the second applicator device 9 are located above the top portion 3, while the first applicator device 7 is located below the top portion 3.

[0213] Due to this arrangement, the volume of device 1 is greatly reduced, thereby allowing for the application of thinner reinforcements (second insert 107) to the upper part of the construction drum, and thicker inserts (first insert 106) to the lower part, such as wire loops wrapped with fabric and sidewall reinforcements.

[0214] More specifically, preferably, the second fixed-point positioning section 2g is located at a height higher than the predetermined first height "Q1" and close to the top portion 3.

[0215] Therefore, in a preferred embodiment, the feed assembly 4 and the second applicator device 9 are configured to apply the carcass ply 103 and the second insert 107 to the top portion 3 of the build drum 2, while the first applicator device 7 is configured to apply the first insert 106 at or below the first height "Q1".

[0216] Furthermore, preferably, the second fixed-point positioning section 2g is located at the first half 2d.

[0217] Advantageously, this layout allows for maximum utilization of the space located radially outward relative to the build drum, while also allowing for sufficient frontal accessibility for possible manual operation by the operator.

[0218] Preferably, the first applicator device 7 includes a carrier 10 and a positioning element 11.

[0219] The carrier 10 is preferably movable between the first position and the second position to move closer to and further away from the build drum 2.

[0220] Conversely, the positioning element 11 is connected to the carrier 10.

[0221] The positioning element 11 is preferably movable elastically along the positioning direction "C" and away from the building drum 2.

[0222] In other words, the positioning element 11 can move away from the first positioning segment 2f so as to generate modulation pressure on it when it comes into contact with the first positioning segment 2f.

[0223] Preferably, the positioning element 11 is configured to generate a thrust between 5N and 50N on the first positioning segment 2f.

[0224] This advantageously allows for automatic positioning (i.e., fixing) of the first insert 106 without the risk of damaging the material.

[0225] Therefore, the locator element 11 has a substantially linear degree of freedom that is parallel to and opposite to the locating direction of the first insert 106 (oriented toward the construction drum 2).

[0226] In this regard, preferably, the orientation of the fixed-point positioning direction "C" is between the horizontal direction and the radial direction incident on the first fixed-point positioning segment 2f.

[0227] Preferably, the positioning element 11 includes a pusher slide 12 provided with an application surface 12a.

[0228] In a preferred embodiment, the pusher 12 is connected to the carrier 10 via an elastic connecting member (preferably an elastic cylinder).

[0229] The surface 12a is applied to the construction drum 2 at least in the second position to pinpoint and apply the first insert 106.

[0230] It should be noted that, preferably, in the second position of the first applicator device 7, the application surface 12a of the push slider 12 is oriented tangentially to the first fixed-point positioning section 2f.

[0231] This advantageously allows for pinpoint positioning of the first insert 106, which produces both strong and “soft” results without creating pressure spikes in the material, thereby making the autonomous adjustment of the pushing action during the pinpoint positioning and closure of the first insert 106 highly efficient.

[0232] Preferably, the positioning direction "C" is parallel to the movement direction "D" of the first applicator device 7 between the first position and the second position.

[0233] In a preferred embodiment, the two directions are parallel and aligned to facilitate component design and reduce lateral stress.

[0234] Therefore, the first applicator device 7 includes an actuator associated with the carrier 10 and the actuator is configured to cause the carrier to translate linearly between a first position and a second position along the direction of motion “D”.

[0235] Preferably, the first applicator device 7 further includes a conveyor belt 13 movable along the conveying direction "B" for moving the first insert 106.

[0236] The conveyor belt 13 can move between the feed zone 13a of the first insert 106 and the positioning element 11.

[0237] Preferably, the conveyor belt 13 has a conveying surface 13c, on which the first insert 106 is located during use, the conveying surface being opposite to the traction surface 13d, which is associated with a moving assembly 14 for moving the conveyor belt itself.

[0238] Preferably, the moving assembly 14 for moving the conveyor belt 13 is provided with pulleys or transmission elements, which are arranged along the movement path of the conveyor belt 13, and the movement path partially coincides with the conveying direction "B".

[0239] It should be noted that the deformable section of the conveyor belt 13 is defined between two successive pulleys 14a.

[0240] In a preferred embodiment, the traction surface 13d of the conveyor belt 13 has teeth.

[0241] Therefore, the teeth of the traction surface 13d are coupled with the corresponding teeth of the pulley. In a preferred embodiment, the pulley is a pinion or a gear.

[0242] In this way, slippage is minimized, thereby improving the accuracy of the first insert's movement and positioning.

[0243] It should be noted that the conveyor belt 13 is slidably associated with the positioning element 11 so that the first insert 106 can move on the positioning element during positioning (and during application, if necessary).

[0244] More preferably, the conveyor belt 13 is inserted between the positioning element 11 and the construction drum 2.

[0245] More specifically, the conveyor belt 13 is preferably slidable along the application surface 12a of the pusher slider 12.

[0246] Preferably, the positioning element 11 is located at one of the deformable sections defined for applying the function of the section 13b.

[0247] In this way, the conveyor belt 13 follows the movement of the positioning element 12 and adapts to the shape of the building drum 2.

[0248] Furthermore, preferably, the carrier 10 of the first applicator device 7 includes a frame 10a with a curved end edge 10b.

[0249] The end edge 10b is placed at the locator element 11 and has a curvature that complements the curvature of the radial outer surface of the building drum 2.

[0250] In other words, the positioning element 11 (i.e., the pusher slider 12) extends from the end edge 10b along the positioning direction, thus enabling it to slide movably into contact with the build drum 2 without the risk of interference.

[0251] As discussed above, the first feed line 5 includes a first feed station 6 operatively arranged upstream of the first applicator device 7.

[0252] The first feed station 6 is preferably configured to feed the first insert 106 to the first applicator device 7 and cut it to an appropriate size.

[0253] Therefore, preferably, the first feeding station 6 includes a loading group 15 and a cutting group 16.

[0254] The loading assembly 15 is provided with the first spool 15a, which is shaped to receive the first semi-finished product 108 wound into a roll 108a.

[0255] The first reel 15a is configured to unwind the reel 108a and advance the first semi-finished product 108 along the first feed direction "F".

[0256] Preferably, the loading assembly 15 further includes a separation member 15b configured to separate the first operating belt 109a of the first semi-finished product 108 from the first service belt 109b.

[0257] The separation component 15b specifically includes a recycling group for the first service belt 109b, which is arranged to wind the first service belt 109b, which has been detached from the first operating belt 109a, into a waste roll.

[0258] The cutting assembly 16 is operably positioned downstream of the loading assembly 15 and is provided with a cutting member 16a configured to cut the operating strip 109a of the first semi-finished product 108 into discrete portions having a predetermined length.

[0259] Preferably, the cutting member 16a is arranged along the motion element 16b associated with the loading assembly 15.

[0260] It should be noted that, in the preferred embodiment, the cutting member 16a has an inclination of less than 90° relative to the feed direction "F" (i.e., the operating direction relative to the moving element 16b).

[0261] In a preferred embodiment, the tilt angle is between 30° and 60°, more preferably about 45°.

[0262] In this manner, after being cut by the cutting member 16a, the first end 106a and the second end 106b of the first insert 106 are inclined relative to the conveying direction.

[0263] In a preferred embodiment, the cutting member 16a includes a blade (metal or laser) that can be selectively moved between an active position and a rest position, in which the blade traverses the first operating band 109a to cut it.

[0264] In this regard, preferably, the moving element 16b extends along its operating direction until it reaches the cutting section of the cutting member 16a, where there is an interruption in the flat plane of the operating band 109a.

[0265] Preferably, the feed zone 13a of the conveyor belt 13 of the first applicator device 7 is adjacent to the downstream of the motion element 16b as a continuation of the feed direction "F".

[0266] In other words, with reference to the feed direction "F", the cutting member 16a is inserted between the motion element 16b and the conveyor belt 13, which are separated from each other by the interruption of the flat plane.

[0267] It should be noted that, preferably, the inclination of the cutting member 16a relative to the feed direction "F" is less than 90°, but the end edges of the moving element 16b and the conveyor belt 13 facing each other are orthogonal to the feed direction "F".

[0268] In this regard, preferably, the cutting member 16a does not traverse the flat plane in its active position, but is used to cut the operating strip 109a when the operating strip is raised relative to the flat plane.

[0269] Preferably, in order to allow for accurate determination of the size of the first insert 106, the cutting assembly 16 includes a measuring member 17 configured to detect the length of the end segment of the first operating band 109a, which is located downstream of the cutting member 16a relative to the feed direction “F”.

[0270] This ensures that the size of the insert corresponds to the predetermined size, except for possible slippage and / or shrinkage of the material.

[0271] Preferably, the measuring member 17 includes a sensor element 17a associated with the conveyor belt 13 of the first applicator device 7 and the sensor element is configured to generate an activation signal when the end section of the first operating belt 109a reaches the predetermined length.

[0272] In a preferred embodiment, the sensor element 17a is optical, such as a phototube.

[0273] It should be noted that, preferably, the cutting assembly 16 includes a control unit 16c, which is configured to stop the loading assembly 15 and activate the cutting member 16a when the activation signal of the sensor element 17a is received.

[0274] More preferably, the control unit 16c is configured to also stop the conveyor belt 13 of the first applicator device 7 when the activation signal of the sensor element 17a is received.

[0275] Furthermore, preferably, the device 1 includes two parallel and side-by-side first feed lines 5.

[0276] Therefore, preferably, each first feed line 5 includes a first applicator device 7 and a corresponding first feed station 6 as described so far.

[0277] This completely frees up the two application lines, thus facilitating the maintenance and setup of each of the two application lines without affecting the functionality of the other application line.

[0278] Preferably, the first applicator device 7 of the two first feed lines 5 can move along an adjustment direction "H" orthogonal to the conveying direction "B" of the first insert 106 in a manner that brings them closer together and separates them.

[0279] This adjustment direction "H" is preferably parallel to the main rotation axis "A" of the building drum 2, so as to allow for changes in the axial distance between the first inserts 106 of the same tire 100.

[0280] Therefore, the device is extremely flexible and adaptable to different tire sizes. Furthermore, the use of a movable applicator device positioned downstream of the fixed feed station greatly simplifies the device's implementation, reduces actuator complexity, and maintains easy accessibility to the material replacement area (remaining external).

[0281] Preferably, an adjustment member 18 is provided associated with each first applicator device 7, and the adjustment member is configured to move the corresponding first applicator device 7 along the adjustment direction "H" between a loading position aligned with the feed direction "F" and a release position misaligned with the feed direction "F" and close to another first applicator device 7.

[0282] Preferably, each adjusting member 18 includes an actuator 18a and a guide 18b.

[0283] The carrier 10 of each first applicator device 7 is slidably associated with the guide 18b for movement along the adjustment direction "H".

[0284] Actuator 18a is connected to carrier 10 to move carrier along guide 18b.

[0285] In a preferred embodiment, the actuator 18a includes a cylinder, preferably a hydraulic cylinder, connected to the carrier 10; more preferably, in order to balance stress, each carrier 10 is associated with two parallel actuators 18a spaced apart along the conveying direction “B”.

[0286] To drive the movement of device 1, a control unit 19 is provided. Preferably, but not necessarily, the control unit 19 also includes a control unit 16c for each cutting device 16.

[0287] Control unit 19 is configured to activate feed group 4 in order to secure one end portion of carcass ply 103 to build drum 2.

[0288] The fixing (or fixed-point positioning) of the carcass ply 103 on the construction drum 2 can be achieved by mechanical or pneumatic means, which will not be described in detail here.

[0289] Preferably, the control unit 19 is further configured to initiate a first rotation of the build drum 2 about the main rotation axis "A" so as to wrap the carcass ply 103 around the build drum 2, i.e., around the build drum 2.

[0290] Therefore, the control unit 19 is configured to stop the first rotation of the build drum 2 and to give the first applicator device 7 (or, if present, both applicator devices 7) a first movement from a first position to a second position in order to secure the first end 106a of the first insert 106 to the carcass ply 103.

[0291] In this way, the first insert 106 is thus positioned at the first fixed-position segment 2f of the building drum 2.

[0292] Therefore, preferably, at this time, the control unit 19 imparts a second movement to the first applicator device 7 (or, if present, to both applicator devices 7) from the second position in the direction of the first position, until the removed position is removed from the build drum 2.

[0293] It should be noted that the position to be moved can be the first position, or, differently, it can be an intermediate position between the first and second positions.

[0294] Therefore, the control unit 19 is configured to initiate a second rotation of the build drum 2 about the main rotation axis "A" so as to wrap the first insert 106 around the carcass ply 103.

[0295] Preferably, the second rotation is the opposite of the first rotation.

[0296] More preferably, the first rotation is oriented such that along the rear half 2e of the construction drum 2, each point of the construction drum 2 first passes through the first fixed-point positioning section 2f and then through the top portion 3.

[0297] Accordingly, the second rotation is preferably oriented such that along the rear half 2e of the drum, each point of the drum 2 first passes through the top portion 3 and then through the first fixed-point positioning section 2f.

[0298] In a preferred embodiment, the control unit 19 is configured to initiate a second rotation of the build drum 2 about the main rotation axis "A" between the first movement and the second movement.

[0299] In other words, the second rotation of the build drum 2 is preferably initiated when the first applicator device 7 is in the second position, wherein the pressing element 11 abuts against the build drum 2.

[0300] In a preferred embodiment, the second movement is initiated after a short time interval following the start of the second rotation; this time interval is preferably between 0 seconds and 2 seconds.

[0301] This allows the pressing action of the locator element 11 to occur simultaneously with the rotation of the build drum 2 within a short time interval, thereby contributing to a greater distribution of the locating action.

[0302] Furthermore, preferably, the control unit 19 is configured to impart a third movement from the removed position to the first applicator device 7 (or, if present, both applicator devices 7) to the second position in order to secure the second end 106b of the first insert 106 to its first end 106a.

[0303] It should be noted that, preferably, the control unit 19 is configured to stop the second rotation after the third motion has ended.

[0304] In other words, when the first applicator device 7 is in the second position at the end of the third movement and the pressing element 11 is against the build drum 2, the second rotation of the build drum 2 preferably stops.

[0305] In a preferred embodiment, the second rotation stops after a short additional time interval following the arrival of the first applicator device 7 at the second start position; this additional time interval is preferably between 0 seconds and 2 seconds.

[0306] Furthermore, preferably, the control unit 19 is configured to impart a fourth movement from the second position to the first position to the first applicator device 7 (or, if present, to both applicator devices) after the second end 106b has been secured to the first end 106a of the first insert 106.

[0307] Furthermore, preferably, the control unit 19 is configured to impart movement from the loading position to the actuator 18a of the adjustment member 18 associated with each first applicator device 7 after the cutting member 16a is activated.

[0308] More specifically, in a preferred embodiment, the control unit 19 is configured to activate the conveyor belt 13 after the cutting action of the cutting member 16a, and simultaneously with or after the activation, command the actuator 18a to move from the loading position to the release position.

[0309] Advantageously, this sequential operation makes the positioning of the first insert 106 particularly efficient and significantly reduces the cycle time.

[0310] Furthermore, preferably, the control unit 19 is also configured to drive the second feed line 8; in fact, in a preferred embodiment, before or after the step involving the first feed line 7, the control unit 19 is configured to activate the second applicator device 9 to coordinate with the first or second rotation of the build drum 2 in order to pinpoint and apply the second insert 107.

[0311] During use, the device 1 described above allows for the implementation of the process according to the invention for constructing tires for bicycles.

[0312] It should be noted that, in the description of the process, the same reference numerals used so far in the description of device 1 will be used for the same technical features.

[0313] In any case, this indicates that all characteristics of device 1 should be considered applicable to the process even if they are not explicitly identified or used in the description of the following process.

[0314] The construction drum 2 is arranged in a specified manner, and the carcass ply 103 is fed from the release zone at a higher height (refer to the horizontal support plane "G") toward the top portion 3 of the construction drum 2.

[0315] Preferably, the end portion of the carcass ply 103 is fixed to the construction drum 2, and more preferably to the top portion 3.

[0316] Preferably, a first rotation is given to the construction drum 2 in order to wind the carcass ply 103 onto the construction drum 2.

[0317] Preferably, the process specifies that the first insert 106 is fed toward the first fixed-point positioning section 2f of the construction drum 2, wherein the first fixed-point positioning section 2f is located at a height lower than or equal to a predetermined first height "Q1", preferably located in the rear half of the construction drum 2.

[0318] It is also specified that the first insert 106 is wound around the construction drum 2 by giving the construction drum 2 a second rotation, or more precisely, around the previously arranged carcass ply 103.

[0319] Preferably, the feeding and winding of the first insert 106 are performed in a series of sequential operations.

[0320] Preferably, a first semi-finished product 108 is arranged, the first semi-finished product including a first service belt 109a connected to the first operation belt 109b.

[0321] The first service band 109b is preferably separated from the first operation band 109a, and preferably separated from the first operation band by a separation operation.

[0322] The separated service strip 109b is preferably recovered through a rewinding step.

[0323] After separation, preferably, the first operating band 109a is advanced along the feed direction "F".

[0324] Therefore, the first operating band 109a is cut into discrete portions of predetermined length.

[0325] Each discrete part defines a first insert 106.

[0326] The first end 106a of the first insert 106 is positioned from a first position away from the build drum 2 to a second position close to the build drum 2.

[0327] Specifically, in the second position, the first end 106a of the first insert 106 abuts against the building drum 2 and contacts the carcass ply 103.

[0328] Therefore, by applying a first pressure to press the first insert 106 onto the carcass ply 103, the first end 106a of the first insert 106 is fixed onto the carcass ply 103 at the first fixed positioning section 2f.

[0329] Preferably, pressure is applied by the positioning device component 11.

[0330] The second rotation is then applied to the construction drum 2 so that the first insert 106 is wound around the construction drum 2.

[0331] Preferably, the second rotation is the opposite of the first rotation.

[0332] More preferably, the first rotational orientation is such that along the rear half 2e of the drum, each point of the forming drum 2 first passes through the first fixed-point positioning section 2f, and then through the top portion 3.

[0333] Accordingly, the second rotation is preferably oriented such that along the rear half 2e of the drum, each point of the forming drum 2 first passes through the top portion 3 and then through the first fixed-point positioning section 2f.

[0334] It should be noted that, preferably, the application of the first pressure and the second rotation are performed simultaneously.

[0335] Therefore, in a preferred embodiment, the application of the first pressure and the second rotation are performed simultaneously within a short time interval; this time interval is preferably between 1 second and 2 seconds.

[0336] Furthermore, preferably, the method specifies that the second end 106b of the first insert 106 is fixed to the first end 106a.

[0337] In other words, this step of the method specifies that when a predetermined rotation angle, preferably about 360°, is reached in the construction drum 2, the second end 106b is stacked on the first end 106a (which is already fixed) of the first insert 106.

[0338] This step is considered to be the step for closing the first insert 106.

[0339] Preferably, when the construction drum 2 has completed or is close to completing its rotation along the second rotation, the second end 106b is fixed by applying a second pressure to press the second end 106b against the first end 106a.

[0340] The second pressure is also preferably applied via the positioning element 11.

[0341] Preferably, the second rotation and the application of the second pressure are performed simultaneously.

[0342] Therefore, in a preferred embodiment, the application of the second pressure and the second rotation are performed simultaneously within a short time interval; this time interval is preferably between 0 seconds and 2 seconds.

[0343] At the end of the time interval, the second rotation is preferably interrupted, thus stopping the construction of drum 2.

[0344] It should be noted that, preferably, the method specifies that the two first inserts 106 are applied in parallel and at a predetermined axial distance.

[0345] In particular, preferably, two of the first inserts 106 are fed in parallel toward the first fixed-point positioning section 2f of the construction drum 2, and the first inserts 106 are wound in parallel around the construction drum 2.

[0346] It should be noted that, preferably, the method specifies that a cut of the corresponding first operation band 109a is performed at a first distance (orthogonal to the feed direction "F"), and that the two first inserts 106 thus manufactured are brought close together downstream of the cut.

[0347] When the predetermined (second) distance is reached, the approach is interrupted, and the first insert 106 can begin to be fed toward the build drum 2.

[0348] Preferably, the method further specifies that the second insert 107 is also positioned toward the second fixed-point positioning segment 2g of the construction drum 2.

[0349] Then, the second insert 107 is fixed at the second positioning section 2g, and the second insert 107 (particularly having a carcass ply 103) is wound around the construction drum 2, wherein the second positioning section 2g is located at the top portion of the construction drum 2, preferably at the front half.

[0350] By imparting rotation to the building drum according to the first rotation or the second rotation (preferably according to the first rotation), the second insert 107 is wound around the carcass ply 103.

[0351] For example, the application of the second insert 107 may specify the positioning and wrapping of two annular bead cores 104 around the carcass ply 103, the two annular bead cores being parallel to each other and arranged such that the lateral end flaps 103a of the carcass ply 103 extend beyond each bead core 104 and are far apart from each other.

[0352] At this point, it is stipulated that each lateral end flap 103a be turned up around the corresponding bead core.

[0353] It should be noted that the steps described so far can also be performed in a different order than that presented in this article, and it may not be necessary to actually actuate all the listed steps.

[0354] For example, in several embodiments, the method specifies that immediately downstream of the carcass ply 103 being wound around the construction drum 2, the first insert 106 is fed and wound around the carcass ply 103.

[0355] This occurs, for example, when the first insert 106 corresponds to the outer fabric of the wire loop.

[0356] As an alternative or combination, in other embodiments, the feeding and winding of the first insert 106 (or multiple first inserts) is performed after the bead core 104 is positioned and the lateral flap 103a is flipped up.

[0357] Examples of this embodiment can be found in the positioning of the first insert 106 (e.g., a sidewall reinforcement).

Claims

1. An apparatus for constructing a raw tire (100) for a bicycle, the apparatus comprising: - Constructing a drum (2), which rotates about a main rotation axis (A), the main rotation axis (A) being located at a predetermined first height (Q1) relative to the horizontal support plane (G). - Feed group (4), the feed group being used to feed at least one carcass ply (103) toward the build drum (2), the feed group being provided with at least one section (4a) for releasing the carcass ply (103), the section being located above the top portion (3) of the build drum (2), - A first feed line (5), configured to feed at least one first semi-finished product (108) including a first insert (106) toward a first positioning section (2f) of the build drum (2), wherein the first feed line (5) includes a first applicator device (7), the first applicator device: -Located below the top portion (3) of the building drum (2), - It is able to move between a first position away from the build drum (2) and a second position close to the build drum (2) to get closer to and away from the build drum (2). - At least one second feed line (8), the second feed line being configured to dispense at least one second semi-finished product (110) including a second insert (107) toward a second positioning section (2g) of the build drum (2), wherein the second insert (107) includes two bead cores (104) whose mutual axial distance remains constant throughout the build process; The first fixed-point positioning section (2f) is located at a height lower than or equal to the predetermined first height (Q1).

2. The device according to claim 1, wherein, The first applicator device (7) includes: - Carrier (10), which is movable between the first position and the second position to approach and move away from the build drum (2). - A positioning element (11) is connected to the carrier (10) and is capable of elastically moving along the positioning direction (C) and away from the construction drum (2).

3. The device according to claim 2, wherein, The positioning element (11) includes a pusher slide (12) with an application surface (12a) that is tangentially oriented to the first positioning section (2f) when the first applicator device (7) is in the second position.

4. The device according to claim 2 or 3, wherein, The fixed-point positioning direction (C) has an orientation between the horizontal direction and the radial direction incident on the first fixed-point positioning section (2f).

5. The device according to claim 2 or 3, wherein, The first applicator device (7) includes a conveyor belt (13) that is movable in a conveying direction (B) from a feed zone (13a) for feeding the first insert (106); the conveyor belt (13) is slidably associated with the locator element (11) and inserted between the locator element (11) and the build drum (2).

6. The device according to claim 3, wherein, The first applicator device (7) includes a conveyor belt (13) that is movable in a conveying direction (B) from a feed area (13a) for feeding the first insert (106); the conveyor belt (13) is slidably associated with the locator element (11) and inserted between the locator element (11) and the build drum (2), wherein the conveyor belt is slidable along the application surface (12a) of the push slider (12).

7. The device according to claim 5, wherein, The first applicator device (7) includes a moving assembly (14) for moving the conveyor belt (13), the moving assembly being provided with pulleys (14a) or transmission elements arranged along the movement path of the conveyor belt (13), wherein the fixed-point positioning element (11) is inserted between two successive pulleys (14a) or transmission elements, defining a deformable application section of the conveyor belt (13) between the two successive pulleys or transmission elements.

8. The device according to claim 5, wherein, The conveyor belt (13) has a conveying surface (13c) opposite to the toothed traction surface (13b).

9. The device according to claim 2 or 3, wherein, The carrier (10) of the first applicator device (7) includes a frame (10a) having a curved end edge (10b) located at the locator element (11) and having a curvature that complements the curvature of the radial outer surface of the building drum (2).

10. The device according to any one of claims 1 to 3, the device comprising a control unit (19), the control unit being configured to: - Stop the first rotation of the construction drum (2) around the main rotation axis (A); -Give the first applicator device (7) a first movement from the first position to the second position in order to fix the first end (106a) of the first insert (106) onto the carcass ply (103); -Give the first applicator device (7) a second movement from the second position in the direction of the first position until it moves away from the construction drum (2); - Initiate a second rotation of the build drum (2) around the main rotation axis (A) to wrap the first insert (106) around the carcass ply (103). - To give the first applicator device (7) a third movement from the removed position to the second position in order to fix the second end (106b) of the first insert (106) to the first end (106a) of the first insert (106).

11. The device according to claim 10, wherein, The control unit (19) is configured to impart a fourth movement from the second position to the first position to the first applicator device (7) after the second end (106b) is secured to the first end (106a) of the first insert (106).

12. The device according to claim 10, wherein, The control unit (19) is configured to: - Initiate the second rotation of the build drum (2) around the main rotation axis (A) between the first and second movements, and / or - Stop the second rotation after the third motion ends.

13. The device according to claim 10, wherein, The control unit is configured to: - Activate the feed group (4) to secure the end portion of the carcass ply (103) to the construction drum (2); - Initiate the first rotation of the build drum (2) to wind the carcass ply (103) onto the build drum (2), wherein the first rotation and the second rotation of the build drum (2) are performed in opposite directions.

14. The device according to any one of claims 1 to 3, wherein, The second feed line (8) includes a second applicator device (9) located above the top portion (3) of the build drum (2), wherein the second positioning section (2g) is located at a height greater than the predetermined first height (Q1) and close to the top portion.

15. The device according to any one of claims 1 to 3, wherein, The main rotation axis (A) of the construction drum (2) is located within a vertical section that divides the construction drum into a front half (2d) and a rear half (2e), the front half of which the operator can access: - The feed group (4) and the first feed line (5) are both located on the side of the rear half (2e) away from the front half (2d); - The first fixed-point positioning section (2f) is located in the latter half (2e).

16. The device according to claim 14, wherein, The main rotation axis (A) of the construction drum (2) is located within a vertical section that divides the construction drum into a front half (2d) and a rear half (2e), the front half of which the operator can access: - The feed group (4) and the first feed line (5) are both located on the side of the rear half (2e) away from the front half (2d); - The first fixed-point positioning section (2f) is located in the latter half (2e). The second fixed-point positioning section (2g) is located in the first half (2d).

17. The device according to any one of claims 1 to 3, wherein, The first feed line (5) includes a first feed station (6) configured to feed the first insert (106) to the first applicator device (7) and cut the first insert to an appropriate size.

18. The device according to claim 17, wherein, The first feed station (6) includes: - Loading assembly (15), the loading assembly being provided with at least one spool (15a), the spool being shaped for receiving the first semi-finished product (108) wound into a roll, and configured for unwinding the roll and advancing the first semi-finished product (108) in the feed direction (F); the first semi-finished product (108) includes a first operating belt (109a). - A cutting group (16), located downstream of the loading group (15), and provided with a cutting member (16a) configured to cut the first operating strip (109a) of the first semi-finished product (108) into discrete portions of a predetermined length, wherein each of the discrete portions of the first operating strip (109a) defines a first insert (106) cut to an appropriate size.

19. The apparatus according to any one of claims 1 to 3, the apparatus comprising two parallel and side-by-side first feed lines (5), wherein, The first applicator devices (7) of the two first feed lines (5) are capable of moving closer to and further apart along the adjustment direction (H), which is orthogonal to the conveying direction (B) of the first insert (106) and parallel to the main rotation axis (A) of the build drum (2).

20. The apparatus of claim 18, wherein the apparatus comprises: Two parallel and side-by-side first feed lines (5), wherein the first applicator devices (7) of the two first feed lines (5) are capable of moving closer to and apart from each other along the adjustment direction (H), the adjustment direction being orthogonal to the conveying direction (B) of the first insert (106) and parallel to the main rotation axis (A) of the building drum (2). An adjustment member (18) associated with each first applicator device (7) is configured to move the corresponding first applicator device (7) along the adjustment direction (H) in a loading position aligned with the feed direction (F) and a release position misaligned with the feed direction (F) and approaching another first applicator device (7).

21. A process for constructing a raw tire (100) for a bicycle, the process comprising: - A construction drum (2) is arranged that can rotate about a main rotation axis (A), which is located at a predetermined first height (Q1) relative to the horizontal support plane (G). - Starting from the release area at a higher height relative to the horizontal support plane (G), the carcass ply (103) is fed toward the top portion (3) of the construction drum (2). - The end portion of the carcass ply (103) is fixed to the construction drum (2), and the construction drum (2) is given a first rotation in order to wind the carcass ply (103) around the construction drum (2). - Feed the first insert (106) toward the first positioning section (2f) of the build drum (2) and wrap the first insert (106) around the build drum (2). - At least one second insert (107) is assigned toward the second fixed-point positioning section of the building drum (2), the second insert comprising at least two bead cores (104). - Throughout the entire construction process, the mutual axial distance between the two bead cores (104) remains constant; The first fixed-point positioning section (2f) is located at a height lower than or equal to the predetermined first height (Q1).

22. The process according to claim 21, wherein, Feeding and winding the first insert (106) includes: - This causes the first end (106a) of the first insert (106) to move from a first position away from the build drum (2) to a second position close to the build drum (2). - By applying a first pressure to press the first insert (106) onto the carcass ply (103), the first end (106a) of the first insert (106) is fixed onto the carcass ply (103) at the first fixed positioning section (2f); -Give the build drum (2) a second rotation in order to wrap the first insert (106) around the build drum (2), wherein the second rotation is opposite to the first rotation.

23. The process according to claim 22, wherein, Feeding and winding the first insert (106) includes: - When the building drum (2) has completed or is close to completing its rotation along the second rotation, the second end (106b) of the first insert (106) is pressed against the first end (106a) of the first insert (106) by applying a second pressure, thereby fixing the second end (106b) of the first insert (106) to the first end (106a) of the first insert (106).

24. The process according to claim 22, wherein: The application of the first pressure and the second rotating part are carried out simultaneously.

25. The process according to claim 23, wherein: The application of the second pressure and the second rotating part occur simultaneously.

26. The process according to claim 23, wherein, Feeding and winding the first insert (106) includes interrupting the second rotation during the application of the second pressure.

27. The process according to any one of claims 21 to 26, wherein, Feeding and winding the first insert (106) includes: - Advance the first operating band (109a) along the feed direction (F); - The first operating band (109a) is cut into discrete portions of predetermined length, wherein each of the discrete portions defines a first insert (106).

28. The process according to any one of claims 21 to 26, the process comprising: - Arrange the two first inserts (106) so that they are oriented parallel to each other and placed at a predetermined first distance, the predetermined first distance being parallel to the main axis of rotation (A); - Bring the two first inserts (106) closer together along an adjustment direction (H) parallel to the main rotation axis (A) of the construction drum (2) until a predetermined second distance is reached; - Feed the two first inserts (106) parallel toward the first fixed positioning section (2f) of the construction drum (2) and wrap the first inserts (106) parallel around the construction drum (2).

29. The process according to any one of claims 21 to 26, further comprising: - The second insert (107) is fixed at the second positioning section (2g) and wrapped around the construction drum (2), wherein the second positioning section (2g) is located at: -The top portion (3) of the building drum (2); -The front half (2d) of the construction drum (2).

30. The process according to any one of claims 21 to 26, wherein, The thickness of the first insert (106) is less than 1 mm.

31. The process according to any one of claims 21 to 26, wherein, The first insert (106) extends between a first end (106a) and a second end (106b) along its conveying direction (B) and has a width between 10 mm and 120 mm orthogonal to the conveying direction (B).

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