CN104349995A - Process and production line for controlled collection of continuous strip-like elements for building tyres - Google Patents

Abstract

A continuous strip (6) of elastomeric material comprising reinforcing cords (3) is cut to produce a continuous strip-like element (2), wherein said reinforcing cords are fed through an extrusion die (10). In the generation zone ("Z") of said continuous strip-like elements (2), guiding means apply a biasing force to each continuous strip-like element (2) to guide them along divergent trajectories. Said deflection force is regulated by means of drive means (33) placed outside the generating zone ("Z") of said continuous strip-like element (2). Each continuous strip-like element (2) is collected on a corresponding roll (17).

Description

Handling and production line for controlled collection of continuous strip-like elements for building tires

technical field

The invention relates to a process for the controlled collection of continuous strip-like elements for building tyres. The invention also relates to a production line for carrying out the above-mentioned process.

Background technique

During the construction of tires it is often necessary to use primary semi-finished products obtained from continuous strip-like elements; such elements consist of textile and/or metal cords parallel to each other and incorporated in at least one layer of elastomeric raw material .

As an example, strip-like finished products of this type may be cut to form strip-like elements to be employed in the manufacture of carcass plies, belts or other components of tires. As an alternative, the continuous strip-like element may be wound into coils which are arranged in side-by-side relationship around the circumferential extension of the tire being processed so as to form the reinforcing layer.

The continuous strip-like elements are usually produced by continuous processing starting from the cords drawn from the respective packages. The total number of cords generally equal to several times the number of cords arranged in a single continuous strip-like element is guided along paths converging towards the gluing unit. At the gluing unit, at least one layer of elastomeric raw material is applied to a set of cords arranged in a coplanar manner, so that a continuous gluing belt is obtained. The continuous coated tape leaving the gluing unit is led through a cutting unit comprising one or more knives which divide the continuous coated tape itself into two or more continuous strip-like elements.

In order to facilitate mutual separation of the continuous strip-like elements, they are moved out of the cutting unit along mutually diverging trajectories by means of suitable offset rollers before being guided to the respective collection station.

In order to meet the production capacity requirements of modern factories, the applicant has studied the dynamic behavior of semi-finished products in the form of a continuous strip that are translated at high speed along the production line.

Thus, the Applicant has been able to observe that, due to various factors that are difficult to identify and control, the continuous belt from the gluing unit occasionally moves sideways during its advancement towards the cutting unit.

Under high speed conditions, these movements tend to significantly alter the trajectory of the continuous strip-like element translated away from the tool, thereby creating the risk of damage and interruption of the manufacturing cycle.

Contents of the invention

The Applicant has observed that precise control of these trajectories in response to occasional movements of the continuous belt can significantly improve the prior art, especially in terms of productivity and quality of the final product.

The applicant has thought of achieving the above-mentioned control by restoring in time the dynamic balance of the lateral thrusts acting on the continuous strip-like element in translation away from the knife in the area of generation of the strip-like element itself.

More precisely, the Applicant has found that carrying out the recovery operation by drive means located outside the production zone of the continuous strip-like element allows precise control without interrupting the production or reducing the production capacity.

More specifically, according to a first aspect, the invention relates to a process for the controlled collection of continuous strip-like elements for building tyres.

Preferably, a continuous strip of elastomeric material comprising reinforcing cords is supplied.

Preferably, in the region where the continuous strip-like element is produced, the continuous strip is cut to produce the continuous strip-like element.

Preferably, a biasing force is applied to each of said continuous strip-like elements in the region of generation of said continuous strip-like elements to guide these continuous strip-like elements along divergent trajectories.

Preferably, said biasing force is adjusted by means of a drive member placed outside the generation area of said continuous strip-like element.

Preferably, each successive strip-like element is collected.

Thus, the Applicant considers that it is possible to increase the production capacity along a production line of continuous strip-like elements without having to use complex systems for suppressing occasional lateral movements of the continuous strip traveling at high speed towards the cutting unit.

By adjusting the offset force in the manner described above, possible deviations in the trajectory of the continuous strip-like element translated in translation away from the tool can be quickly corrected without having to stop or slow down production to perform the required correction. Thus, the production line can always be utilized at maximum capacity, even during conditioning operations.

In a second aspect, the invention relates to a production line for the controlled collection of continuous strip-like elements for building tyres.

Preferably, a belt feeding device is provided for feeding a continuous belt of elastomeric material comprising reinforcing cords.

Preferably, a cutting unit is provided which slidably engages the continuous strip and carries a knife which operates through the continuous strip to produce a continuous strip-like element from the continuous strip.

Preferably, guide means are provided which operate on said continuous strip-like elements to exert respective biasing forces so as to guide these continuous strip-like elements along mutually diverging trajectories.

Preferably, adjustment means are provided for adjusting said biasing force acting on said continuous strip-like element.

Preferably, at least one collecting unit is provided for collecting individual continuous strip-like elements.

Preferably, said adjustment means can be operated by drive means arranged outside the generation area of said continuous strip-like element.

In at least one of the above aspects, one or more of the following preferred embodiment schemes may also be adopted.

Preferably, said act of adjusting the biasing force is performed in response to lateral movement of the continuous belt.

Thus, it is possible to optimize the quality of the process without having to guide the alignment of the continuous strip advancing towards the tool with extreme precision.

In said generation region, preferably at least one first deviation from the laying plane of the continuous strip is applied to the continuous strip-like element.

Thus, the continuous strip-like element can be moved away from the knife immediately after cutting and more space can be provided for placing the guide means.

In the generation region, a second deviation directed laterally with respect to the longitudinal extension direction of the continuous strip can also be applied to each continuous strip-like element.

This lateral deviation causes the trajectories of successive strip-like elements to desirably diverge along respective diverging trajectories.

Preferably, the first offset and the second offset may be applied simultaneously.

In the generation region, at least one third deviation towards the laying plane of the continuous strip can also be applied to the continuous strip-like elements.

Preferably, after the third deflection, the successive strip-like elements are in mutual coplanar relationship.

Thus, successive strip-like elements arranged in a coplanar manner with respect to each other and laterally separated from each other are adapted to be simultaneously engaged by the drive unit and guided along the production line to successive processing stations.

Preferably, the deflection force may be generated by passing the continuous strip-like element over a deflection roller against the deflection roller.

Thus, the deflection force can be generated by means of structurally simple, cheap and highly reliable components.

More specifically, said act of adjusting the deflection force may be performed by rotating said at least one deflection roller about a correction axis, wherein said correction axis is perpendicular to the rotation axis of at least one of said deflection rollers.

Thus, the magnitude of the biasing force can be controlled by means of simple, cheap and highly reliable components.

The action of adjusting the offset force may be performed in response to the notification signal.

Therefore, the timeliness of correcting the offset force can be improved.

More specifically, the following actions may be provided: comparing the position of the diverging section of at least one of the n continuous strip elements with a preset theoretical reference position; and when the position of the diverging section is compared with the theoretical reference position A notification signal is issued when the discrepancy exceeds a predetermined tolerance threshold.

In this way, the correct position of the continuous strip-like element can be constantly controlled, thereby facilitating timely corrective operations.

Preferably said cutting action may be performed simultaneously along respectively opposite edges of the continuous strip to produce pairs of continuous strip-like elements.

Preferably, said pairs of continuous strip-like elements are produced successively starting from the outer edge of the continuous strip.

In this way, it is possible to effectively use the continuous tape to produce continuous strip-like elements and to separate these continuous strip-like elements.

Preferably, the act of laterally translating the carriage carrying the knives is also performed in order to follow the transverse movement of the continuous belt.

Thus, precise cutting is facilitated due to the correction of the relative positioning between the knife and the continuous strip after an undesired lateral movement of the continuous strip.

Preferably, the act of translating the carriage is performed by the action of a lateral thrust caused by the lateral movement of the continuous belt.

In this way, the structure and function of the system are simplified due to the spontaneous alignment of the knives relative to the continuous strip.

It is also possible to provide an action for correcting the relative positioning between the continuous strip and the knife during translation of the continuous strip-like element.

Thus, correct cutting can be restored in the event of a failure.

Preferably said correction is performed by moving the knife transversely relative to an offset roller, wherein the continuous strip-like element passes against the offset roller.

Therefore, the relative positioning between the continuous belt and the cutter can be corrected with simple and reliable equipment.

Preferably, the lateral movement can be achieved by means of an actuating arm which is disengaged from the cutting unit when the correction has taken place.

Thus, accurate cutting is facilitated.

In fact, the spontaneous lateral movement of the continuous belt facilitates the disengagement of the cutting unit from the actuating arm.

Preferably, the act of feeding said continuous belt may comprise: feeding a continuous reinforcing cord such that the continuous reinforcing cord translates longitudinally through the extrusion die; applying at least one raw elastomeric layer to the continuous reinforcing cord translating through the extrusion die; on the cord.

Preferably, each continuous strip-like element is collected on a respective roll separately from the other continuous strip-like elements.

Preferably, the feed speed of the continuous web is between about 1 m/s and about 3 m/s.

More preferably, the feed speed of the continuous web is between about 1.5 m/s and about 2.5 m/s.

Preferably, the guiding means apply to said continuous strip-like elements at least one first deviation from the laying plane of the continuous strip.

Preferably, the guiding means impart to said continuous strip-like element at least one second deviation directed laterally with respect to the longitudinal extension direction of the continuous strip.

Preferably, the guiding means apply to said continuous strip-like elements at least one third deviation towards the laying plane of the continuous strip.

Preferably, after the third deflection, the successive strip-like elements are in mutual coplanar relationship.

Preferably, the guiding means comprise offset rollers arranged to operate in contact relationship with said continuous strip-like element.

Preferably, each offset roller may have an operating surface having a convex profile which operates in contact with the respective continuous strip-like element.

Preferably, each offset roller is capable of idling.

Each deviating roller is rotatably supported according to an axis of rotation inclined with respect to a direction perpendicular to the direction of longitudinal extension of a length of continuous strip-like element upstream of the deviating roller itself.

This tilt helps create the desired offset force.

Preferably, for each continuous strip-like element produced by the cutting unit there are provided at least two offset rollers aligned with each other along trajectories diverging from the longitudinal centerline of the continuous strip.

Preferably, each offset roller is positionable about a correction axis perpendicular to its axis of rotation.

In a preferred embodiment, each offset roller is supported by a rod so as to be able to rotate about said correction axis.

Preferably, the adjustment means comprise a transmission rod acting on said rod.

The transmission rod includes a rod projecting radially relative to the correction axis and a drive arm constrained to the rod.

Preferably, the drive member comprises a first threaded element which is rotatably supported outside said generating area.

Thus, since a large angular rotation of the first threaded element corresponds to a small movement of the offset roller about the correction axis, the magnitude of the offset force can be adjusted with good precision.

The first threaded element is operatively engageable with a second threaded element carried by the drive arm.

Preferably the first threaded element engages with the support structure of the cutting unit such that the entire transmission rod is independent of and immune to possible lateral movements of the cutting unit relative to the support structure.

Signaling means may also be provided to signal a notification when the position of the diverging segments of at least one continuous strip-like element exceeds a predetermined tolerance threshold.

In one embodiment, the following components may be provided: sensor means for detecting the position of diverging segments of at least one continuous strip-like element; and a comparator for comparing the positions detected by the sensor means and preset theoretical reference positions.

In a preferred embodiment, at least one actuator may be provided which acts on each first threaded element to automatically adjust the corresponding offset roller around the Orientation of the above correction axis.

Preferably, said knives are assigned in respective pairs of knives spaced apart from each other along the longitudinal translation direction of the continuous strip.

The knives of each pair are arranged symmetrically with respect to the longitudinal centerline of the continuous strip.

The knives are assigned to define a V-shaped configuration, the apex of which faces the collecting unit.

Preferably, the knives are carried by a carriage which is movable in a direction transverse to the feeding direction of the continuous web.

Preferably, the knife is removably secured to a support block which is removably secured to the carriage.

Preferably, the support block is positioned along a direction substantially parallel to the extension of the blade of each knife.

Preferably, the cutting unit may comprise a centering guide operatively engaging the continuous strip to maintain a central positioning of the continuous strip relative to said knives.

Preferably, the centering guide has a passage opening whose width is equal to the width of the continuous strip.

Preferably, the centering guide is fixed relative to the cutting unit.

Thrust means may also be provided for imparting lateral movement to the knife.

Preferably, the thrust means can be actuated from outside said generation area.

The thrust means may comprise an actuating arm acting on a carriage carrying said tool.

The thrust means may comprise an actuating arm acting on the cutting unit.

Preferably, the actuator arm is removably engageable with the cutting unit.

In a preferred embodiment, the actuating arm is carried by a rod which is movable axially to impart lateral motion to the cutting unit.

Preferably, the lever is rotatable about its longitudinal axis for disengaging the actuating arm from the cutting unit.

Preferably, the belt supply means may comprise: an elastomer material supply means for supplying the elastomer material to the extrusion die; a reinforcing cord for supplying said reinforcing cords arranged parallel to and adjacent to each other to the extrusion die Cord supply device.

The collection unit comprises a plurality of reels, each dedicated to winding a respective continuous strip-like element.

Description of drawings

Other features and advantages will be more apparent from the detailed but not exclusive description of a preferred embodiment of a process and production line for the controlled collection of continuous strip-like elements for building tyres, according to the invention. The following description will be made with reference to the accompanying drawings, given as non-limiting examples only, in which:

- Figure 1 schematically shows a plan view of a production line obtained according to the invention;

– Figure 2 shows a detail of the production line in top view, highlighting the transition zone surrounding the cutting unit;

- Figure 3 shows a detail of Figure 2 in side view;

- Figure 4 shows the cutting unit in a perspective view;

- Figure 5 shows a continuous strip-like element obtainable by the invention in a broken perspective view.

Detailed ways

With reference to the above-mentioned figures, the reference number 1 is used to designate a production line for the controlled collection of continuous strip-like elements for building tires according to the invention.

The production line 1 is arranged to acquire and collect a plurality of continuous strip-like elements 2, one of which is shown in detail in Figure 5, comprising a plurality of reinforcing cords 3, said reinforcing cords 3 is made, for example, of textile, synthetic and/or metallic material. The reinforcing cords 3 extend parallel to each other, preferably in a mutually coplanar relationship, along the longitudinal extension direction of the continuous strip-like element 2 .

The reinforcing cords 3 are joined in or covered by at least one layer of the elastomeric raw material 4 .

Each continuous strip-like element 2 is suitable for building a tire for a vehicle wheel. For example, in order to build tires for vehicle wheels, each continuous strip-like element 2 may be cut into sections of predetermined lengths which will be used to make the carcass ply, belt ply or other parts.

The production line 1 comprises a strip feeder 5 which during manufacture supplies a continuous strip 6 of elastomeric material comprising said reinforcing cords 3 and comprising reinforcing cords The number of 3 is preferably equal to several times the predetermined number of cords in each continuous strip-like element 2, but the number of reinforcing cords 3 included need not be equal to the predetermined number of cords in each continuous strip-like element 2 several times.

The belt supply device 5 includes a cord supply device 7 which supplies the reinforcing cord 3 . For example, the cord supply device 7 may comprise at least one creel 8 making a plurality of packages 8a; from each of the plurality of packages 8a a reinforcing cord 3 is drawn to form a continuous strip-like element 2.

The reinforcing cords 3 coming from the creel 8 are guided along several paths converging towards one another towards the extruder 9 to which the elastomeric raw material is fed. Preferably, the reinforcing cords 3 pass through at least one guiding element, such as a carding element, located in the vicinity of the extrusion die 10 in which the elastomeric material flows. Preferably, the elastomeric material is supplied to the extrusion die 10 by means of supply means comprising, for example, an extruder and/or a gear pump 11 . The elastomeric material can reach the gear pump 11 during the work of the screw operatively housed in the extruder 9 upstream of the gear pump 11 itself.

Inside the extrusion die 10, the elastomeric raw material is applied to the reinforcing cords 3 translating longitudinally through the extrusion die itself. The reinforcing cords 3 leave the extrusion die 10 along mutually parallel and coplanar trajectories; the reinforcing cords 3 are covered by a layer 4 formed of elastomeric raw material whereby the reinforcing cords 3 are in contact with the layer 4 to form the aforementioned continuous belt 6.

The continuous belt 6 may be subjected to a tensioning unit 12 which drives the reinforcing cords 3 and the elastomeric material through the extrusion die 10 due to the traction applied to the continuous belt itself.

At the tensioning unit 12 or in a region upstream of the tensioning unit 12 and/or in a region downstream of the tensioning unit 12, the continuous strip 6 leaving the extrusion die 10 can be cooled. This cooling effect allows proper structural consolidation of the elastomeric raw material and of the continuous strip 6 as a whole. Downstream of the tensioning unit 12, a storage unit 13 may be provided which defines a winding circuit capable of storing a suitable length of the continuous strip 6 coming from the tensioning unit 12 .

In a manner known per se and which will therefore not be further explained here, it is possible to respond to possible changes in the production rate of the continuous web 6 caused by the web supply device 5 and/or in response to the production of the continuous web 6 downstream of the same storage unit 13 . As required, the length of the winding loop defined in the storage unit 13 can be adjusted. Thus, even in the case of variations in productivity or temporary interruption of production in the downstream and upstream portions of the same storage unit 13 of the production line 1, it is possible to facilitate the continuity of processing.

Preferably, the feed speed of the continuous belt 6 is between about 1 m/s and about 3 m/s.

More preferably, the feed speed of the continuous belt 6 is between about 1.5 m/s and about 2.5 m/s.

The “generating zone” “Z” of the continuous strip-like element 2 comprises the cutting unit 14 and the guiding means 28 .

Preferably, said generation zone "Z" is obtained in a space with a prismatic configuration.

Preferably, said generation zone "Z" comprises at least a part of the regulating means 30 .

However, said generation zone "Z" does not include at least one part of the drive means 33 and possibly the support structure 23 which engages with the drive means themselves.

The cutting unit 14, the guide means 28, the adjustment means 30, the drive means 33 and the support structure 23 will be described in more detail below.

Preferably, downstream of the storage unit 13, said cutting unit 14 slidably engages the continuous strip 6 to divide the continuous strip 6 into a plurality of continuous strip-like elements 2, each of said continuous strip-like elements 2 comprising A predetermined number of reinforcing cords 3 .

A drive unit 15 located downstream of the cutting unit 14 operates on each continuous strip-like element 2 to ensure continuous movement of the continuous strip-like element 2 to the cutting unit 14 .

Downstream of the drive unit 15, the continuous strip-like elements 2 are collected separately from each other by at least one collection unit 16, which in a preferred technical solution comprises a plurality of reels 17, each reel 17 being dedicated to For winding the corresponding continuous strip element 2 .

The cutting unit 14 comprises n knives 18 carried by a carriage 19 and operating through the continuous strip 6 to produce n+1 continuous strip-like elements 2 with the continuous strip 6 .

Preferably, the knives 18 are assigned as one or more pairs of knives spaced apart from each other along the direction of longitudinal translation "F" of the continuous strip 6, preferably the one or more pairs of knives The knives define a V-shaped configuration, the apex of which faces the collection unit 16 .

Preferably, the knives 18 of each pair are arranged symmetrically with respect to the longitudinal centerline “L” of the continuous strip 6 .

In a preferred embodiment, the central cutter 18 may be arranged at the apex of the V-shaped configuration so as to operate along the longitudinal centerline "L" of the continuous strip 6 .

Thus, cutting actions can conveniently be performed simultaneously along respective opposite edges of the continuous strip 6 in order to form pairs of continuous strip-like elements 2 . Conveniently, pairs of continuous strip-like elements 2 are produced in succession starting from the outer edge of the continuous strip 6 itself.

In a different preferred embodiment (not shown), at the apex of the V-shaped formation, a pair of knives 18 are provided. In the technical solution of this embodiment, the continuous strip-like element 2 to be produced in the central position continues straight, and the cutting unit 14 produces an odd number of continuous strip-like elements 2 by its own action, which number is equal to 2n+1, where n is the logarithm of the tool 18 .

Preferably, the knives 18 are individually and removably secured to respective seats 20 provided on the carriage 19, each said knife 18 being secured to a respective said seat 20 by means of a respective knife locking member 20a. Conveniently, the abutment 20 may be formed on a support block 21 which is removably secured to the bracket 19 by means of a block locking member 22 and which may be arranged along the edge 18a of each knife 18. The extensions are positioned in substantially parallel directions. Thus, by adjusting the position of the support block 21, it is possible to move all the knives 18 simultaneously along the respective cutting edges 18a and to arrange all the knives 18 at different positions with respect to the laying plane "P" of the continuous strip 6, so that each Different parts of the cutting edge 18a of the knife 18 successively come into interfering relationship with the advancing continuous strip itself. In other words, the position of the knives 18 can be changed so that the continuous strip 6 is cut by a new portion of the blade 18a of each knife 18, for example when a previously used portion is worn. Each knife 18 is also suitable to be mounted according to at least two different positions turned by 180° relative to each other in order to provide the continuous band 6 with a new part of the cutting edge 18a that was previously idle.

Preferably, the cutting unit 14 is freely movable in a direction transverse to the longitudinal translation direction “F” of the continuous strip 6 . To this end, the bracket 19 may be arranged to be slidably mounted on a fixed support structure 23 . For example, the support structure 23 may have a guide rod 24 transverse to the longitudinal extension of the continuous belt 6 , which slides through a guide bushing 25 carried by the bracket 19 .

The cutting unit 14 slidably engages the continuous belt 6 at a centering guide 26 .

More specifically, the centering guide 26 , preferably carried by the bracket 19 , engages the continuous strip 6 at an access opening 27 , the width of which is equal to the width of the continuous strip 6 itself. Thus, the continuous belt 6 can be kept in a centered position relative to the knife 18 . A possible lateral movement of the continuous belt 6 from the belt feeding device 5 can in fact easily cause a corresponding lateral translation of the carriage 19 . In fact, engagement of the continuous belt 6 by the centering guide 26 will transmit a lateral thrust to the cutting unit 14 due to the lateral movement of the continuous belt 6 .

Said guide means 28 are accommodated in said generation zone “Z” containing the cutting unit 14 . The guiding means 28 operate on the continuous strip-like elements 2 to apply respective biasing forces to the continuous strip-like elements 2 so as to guide these continuous strip-like elements 2 along mutually divergent trajectories moving away from the respective knives 18 .

More specifically, the guiding means 28 comprise deflecting rollers 29 each adapted to operate in contact relationship with one of the continuous strip-like elements 2 , preferably by means of an operating surface 29 a having a convex profile.

Preferably, at least two offset rollers 29 are provided for each continuous strip-like element 2 produced by the cutting unit 14 along The trajectories are aligned with each other.

Preferably, the offset rollers 29 are each freely rotatably supported along a respective axis of rotation "X" relative to the longitudinal direction of the length of the continuous strip-like element 2 upstream of the offset rollers 29 themselves. The extending portion is slightly inclined with respect to the vertical direction. Thus, the passage of the continuous strip-like element 2 against the deflection roller 29 will generate a desired deflection thrust suitable for the continuous strip-like element 2 translating away from the knife 18 to have a diverging trajectory ; these trajectories diverge relative to each other and/or relative to the continuous strip 6 .

More specifically, the offset rollers 29 may conveniently be positioned such that each continuous strip-like element 2 has: at least one first deviation from the laying plane "P" of the continuous strip 6 after being cut by the corresponding knife 18; and At least one second deviation, opposite to the first deviation, ie transverse to the longitudinal extension of the continuous strip 6 . The first deviation and the second deviation can also be implemented simultaneously as components of a single oblique deviation.

Before reaching the drive unit 15 , at least a part of the continuous strip-like element 2 is also subjected to a third deviation towards the laying plane “P” of the continuous strip 6 . Conveniently, the successive strip-like elements 2 are arranged coplanar with each other when reaching the drive unit 15 .

The magnitude of the deflection force can be adjusted via adjustment means 30 associated with the guide means 28 . Thus, a correct and stable trajectory can be provided for the individual continuous strip-like elements 2 produced by cutting.

The deflection force can also be adjusted in response to a possible lateral movement of the continuous belt 6, if desired. These lateral movements of the continuous belt 6 are produced by factors which are difficult to predict or control, such as the presence of the belt supply 5 or other areas upstream of the cutting unit 14; movement, but also relative movement between the knife 18 and the single deflection roller 29, with the result that the trajectory of the continuous strip-like element 2 and the deflection thrust applied to the continuous strip-like element 2 are changed. The adjustability of the offset force allows compensating for these variations and restoring the condition of dynamic equilibrium of the continuous strip-like element 2 in translation on each offset roller 29 .

To this end, each offset roller 29 may conveniently be supported by a bar 31 rotatably engaged by a base plate 32 carried by the support structure 23 of the cutting unit 14 . More specifically, each rod 31 is able to rotate about a corrected axis "Y" when actuated by a drive member 33 which is perpendicular to the axis of rotation "X" of the roller itself and which Outside the aforementioned generation zone "Z" of the continuous strip-like element 2 .

For each offset roller 29, the drive member 33 comprises at least one first threaded element 34, such as a ring nut, which is rotatably engaged with the support structure 23 of the cutting unit 14 and which is positioned relative to the The above-mentioned generation zone "Z" containing the cutting unit 14 is located outside.

A first threaded element 34 axially fixed relative to the support structure 23 operates a transmission rod 35 associated with a respective rod 31 . For example, the transmission rod 35 comprises a drive arm 36 operatively constrained, for example by a ball joint 37, to a lever 38 which is engaged by means of a clamp 39 with one end of a corresponding rod 31 so as to be relative to The aforementioned correction axis "Y" protrudes radially.

The first threaded element 34 operatively engages a second threaded element 40 represented, for example, by the threads carried by the drive arm 36 .

Thus, by driving the first threaded element 34 to rotate, it is possible to adjust the position direction of the corresponding offset roller 29 around the correction axis "Y" in order to fine-tune the offset produced by this offset roller 29 acting on the continuous strip element 2 force.

The offset force can be adjusted manually after a visual control of the stability of the trajectory of the continuous strip-like element 2 translated away from the knife 18 at fairly frequent time intervals. In fact, after detecting a possible irregularity in the trajectory, the operator manually operates the first threaded element 34 to correct the trajectory of one or more of the continuous strip-like elements 2 .

In order to facilitate the timely operation of the operator, when the position of the diverging section of at least one continuous strip element 2 exceeds a predetermined tolerance threshold, a signaling device 41 can be used to send out a notification signal, such as an acoustic signal and/or a visual signal.

For example, such signaling means 41 may comprise sensor means 42, eg optical, mechanical or other type of sensor means, which detect the position of the divergent segments of each of the continuous strip-like elements 2 in the generation zone "Z".

In the preferably programmable electronic control unit 43 the theoretical reference position of the diverging segments in each successive strip-like element 2 is stored. A comparator 44 associated with the electronic control unit 43 compares the position detected by the sensor member 42 with a preset theoretical reference position.

A notification signal can be sent by the signaling means 41 when the difference between the position of the diverging section and the theoretical reference position exceeds a predetermined tolerance threshold.

In a preferred embodiment, after said electronic control unit 43 outputs a signal, at least one actuator (not shown) acts by automatically adjusting the orientation of the corresponding offset roller 39 about the aforementioned correction axis "Y" on each first threaded element 34 .

Each knife 18 performs a cut between two adjacent reinforcing cords 3 of the continuous strip 6 so that each continuous strip-like element 2 has a predetermined number of reinforcing cords 3 .

However, it may happen that, due to uncontrolled movement of the continuous strip 6 relative to the knives 18 during high-speed manufacturing, one or more of the knives 18 cuts one of the adjacent reinforcing cords 3 and the system has a new The equilibrium condition in which not all continuous strip-like elements 2 are formed with the correct width and/or with a predetermined number of reinforcing cords 3 .

In order to eliminate the above-mentioned problems, the cutting unit 14 can also be associated with a thrust device 45 capable of correcting the gap between the continuous strip 6 and the knife 18 during the translation of the continuous strip-like element 2 by moving the cutting unit 14 transversely, if necessary. relative positioning between them. More specifically, the thrust means 45 are driven from outside the generating zone "Z" in order to move the knife 18 transversely relative to the offset roller 29 .

Preferably, the thrust means 45 comprise an actuating arm 46 carried by a rod 47 , preferably of circular cross-section, movable axially through the support structure 23 of the carriage 19 . A control knob 48 carried by the rod 47 allows the actuator arm 46 to be moved between a rest state in which the actuator arm 46 is disengaged from the bracket 19 and an operative state in which the actuator arm 46 Engages with bracket 19. To this end, the actuating arm 46 can, for example, be provided with a fork-shaped end 49 into which a grab lug 50 carried by the centering guide 26 can be removably inserted.

In a normal operating state of the production line 1 , the actuating arm 46 remains in a resting state in which the actuating arm 46 is disengaged from the bracket 19 . When a corrective operation is required, the operator can operate the control knob 48 so that the actuator arm 46 engages the carriage 19 and imparts a small shock or thrust action to the carriage itself, causing rapid lateral movement of the knife 18 .

Due to the reaction caused by the continuous strip-like element 2 translating in engagement with the deflection roller 29, these transverse movements cause the continuous belt 6 to move relative to the knife 18, thereby restoring the correct position of the continuous belt 6 relative to the knife 18.

Claims (41)

1., for controllably collecting a process for the continuous strip linear element (2) for building tire, described process comprises:

Supply comprises the continuous band (6) be made up of elastomeric material strengthening cord (3);

In the generation region (Z) of described continuous strip linear element (2), cut described continuous band (6) to produce continuous strip linear element (2);

In the described generation region (Z) of described continuous strip linear element (2), apply biasing force to each described continuous strip linear element (2), with along continuous strip linear element described in the locus guiding dispersed;

The drive member (33) outside by the described generation region (Z) being placed on described continuous strip linear element (2) regulates described biasing force;

Collect each continuous strip linear element (2).

2. process according to claim 1, wherein, the cross motion in response to described continuous band (6) performs the action regulating described biasing force.

3. according to the one or more described process in aforementioned claim, wherein, in described generation region (Z), at least one applying to depart from from the laying plane (" P ") of described continuous band (6) to described continuous strip linear element (2) first departs from.

4. process according to claim 3, wherein, in described generation region (Z), applies second the departing from of longitudinal extension direction sideward directed relative to described continuous band (6) to each continuous strip linear element (2).

5. process according to claim 4, wherein, described first departs to depart from described second and is applied simultaneously with each other.

6. according to the one or more described process in claim 3 to 5, wherein, in described generation region (Z), at least one applying to depart from towards the laying plane (P) of described continuous band (6) to described continuous strip linear element (2) the 3rd departs from.

7. process according to claim 6, wherein, after the described 3rd departs from, described continuous strip linear element (2) has mutually relation of plane altogether.

8. according to the one or more described process in aforementioned claim, wherein, by making described continuous strip linear element (2) to produce described biasing force against the mode of skew roller (29) by described skew roller.

9. process according to claim 8, wherein, by make in described skew roller (29) at least one around correction axis (Y) rotate perform the action regulating described biasing force, wherein, at least one the pivot center (X) of described correction axes normal in described skew roller (29).

10., according to the one or more described process in aforementioned claim, wherein, perform the action regulating described biasing force in response to notification signal.

11. according to the one or more described process in aforementioned claim, and described process also comprises following action:

By the position of the divergent section of at least one in described continuous strip linear element (2) compared with the theoretical principle position of presetting; And

When difference between the position and described theoretical principle position of described divergent section exceeds predetermined tolerance threshold value, signal of giving notice.

12. according to the one or more described process in aforementioned claim, and wherein, the relative edge of the difference along described continuous band (6) performs cutting action, to produce multipair continuous strip linear element (2) simultaneously.

13. process according to claim 12, wherein, from the outer ledge of described continuous band (6), adjoining land produces described multipair continuous strip linear element (2).

14. according to the one or more described process in aforementioned claim, and described process also comprises following action: bracket (19) lateral translation making carrying cutter (18), to follow the cross motion of described continuous band (6).

15. process according to claim 14, wherein, are used for execution by the horizontal thrust caused by the cross motion by described continuous band (6) and make the action of described bracket (19) translation.

16. process according to claims 14 or 15, described process also comprises following action: during the translation of described continuous strip linear element (2), revise the relative position between described continuous band (6) and described cutter (18).

17. process according to claim 16, wherein, by making described cutter (18) perform described correction relative to described skew roller (29) cross motion, wherein said continuous strip linear element (2) in the mode against described skew roller by described skew roller.

18. process according to claim 17, wherein, perform described cross motion by actuator arm (46), described actuator arm when revising and described cutter unit (14) throw off.

19. according to the one or more described process in aforementioned claim, and wherein, the action supplying described continuous band (6) comprises:

Cord (3) is strengthened in supply continuously, is translated across extrusion die (10) to make described continuous reinforcement cord end wise;

At least one stock flexible body layer is applied to and is translated across on the described continuous reinforcement cord (3) of described extrusion die (10).

20. according to the one or more described process in aforementioned claim, and wherein, each continuous strip linear element (2) is collected on corresponding reel (7) in the mode be separated with other continuous strip linear element (2).

21. according to the one or more described process in aforementioned claim, and wherein, the feed speed of described continuous band (6) is between about 1m/s and about between 3m/s.

22. 1 kinds for controllably collecting the manufacturing line of the continuous strip linear element (2) for building tire, described manufacturing line comprises:

Band feedway (5), described band feedway is used for supply and comprises the continuous band (6) be made up of elastomeric material strengthening cord (3);

Cutter unit (14), described cutter unit engages described continuous band (6) slidably and carries cutter (18), described cutter runs through described continuous band (6) operation, produces continuous strip linear element (2) to utilize described continuous band;

Guiding device (28), described guiding device operates to apply corresponding biasing force to described continuous strip linear element (2), thus along continuous strip linear element described in the locus guiding mutually dispersed;

Control apparatus (30), described control apparatus is used for the described biasing force of regulating action on described continuous strip linear element (2);

At least one collector unit, at least one collector unit described is for collecting each continuous strip linear element (2);

Wherein, described control apparatus (30) can be operated by the drive member (33) that the generation region (Z) being arranged in described continuous strip linear element (2) is outside.

23. manufacturing lines according to claim 22, wherein, described guiding device (28) apply to depart from from the laying plane (P) of described continuous band (6) to described continuous strip linear element (2) at least one first to depart from.

24. according to the one or more described manufacturing line in claim 22 to 23, wherein, described guiding device (28) comprises skew roller (29), and described skew roller is arranged to operate in the mode forming contact relation with described continuous strip linear element (2).

25. manufacturing lines according to claim 24, wherein, each skew roller (29) is rotatably supported according to pivot center (" X "), and described pivot center tilts relative to the direction vertical with the longitudinal extension direction of the one section of continuous strip linear element (2) being positioned at described self upstream of skew roller (29).

26. according to the one or more described manufacturing line in claim 22 to 25, wherein, for each continuous strip linear element (2) produced by described cutter unit (14), be provided with at least two skews roller (29), the track that described at least two skew rollers are dispersed along the longitudinal midline (L) from described continuous band (6) is aimed at mutually.

27. according to the one or more described manufacturing line in claim 24 to 26, and wherein, each skew roller (29) is around correction axis (Y) location, and described correction axes normal is in the pivot center (X) of this skew roller.

28. according to the one or more described manufacturing line in claim 22 to 27, and wherein, described drive member (33) comprises the first screwing element (34), and described first screwing element is rotatably supported at described generation region exterior.

29. according to the one or more described manufacturing line in claim 22 to 28, described manufacturing line also comprises signaling device (41), and described signaling device is used for giving notice when the position of the divergent section of at least one continuous strip linear element (2) exceeds predetermined tolerance threshold value signal.

30. according to the one or more described manufacturing line in claim 22 to 29, and described manufacturing line also comprises:

Sensor component (42), described sensor component is for detecting the position of the divergent section of at least one continuous strip linear element (2);

Comparator (44), described comparator is used for the position that more described sensor component (42) detects and the theoretical principle position of presetting.

31. according to the one or more described manufacturing line in claim 22 to 30, wherein, described cutter (18) is allocated to corresponding cutter pair, and corresponding cutter is spaced from each other to the longitudinal translation direction (F) along described continuous band (6).

32. manufacturing lines according to claim 31, wherein, the right cutter (18) of each cutter is arranged symmetrically relative to the longitudinal midline (L) of described continuous band (6).

33. according to the one or more described manufacturing line in claim 22 to 32, and wherein, described cutter (18) is allocated to and limits V columnar structure, and the summit of described V columnar structure is in the face of described collector unit (16).

34. according to the one or more described manufacturing line in claim 22 to 33, wherein, described cutter (18) is carried by bracket (19), and described bracket can move along the direction of the direction of the supply transverse to described continuous band (6).

35. according to the one or more described manufacturing line in claim 22 to 34, wherein, described cutter unit (14) comprises centering guiding piece (26), described centering guiding piece operatively engages described continuous band (6), locates relative to the centering of described cutter (18) to keep described continuous band.

36. according to the one or more described manufacturing line in claim 22 to 35, and described manufacturing line also comprises thruster (45), and described thruster makes described cutter (18) cross motion.

37. manufacturing lines according to claim 36, wherein, described thruster (45) can by from the external drive of described generation region (Z).

38. manufacturing lines according to claim 36 or 37, wherein, described thruster (45) comprises actuator arm (46), and described actuator arm acts on and carries on the bracket (19) of described cutter.

39. manufacturing lines according to claim 36 or 37, wherein, described thruster (45) comprises the actuator arm (46) acted on described cutter unit (14).

40. according to manufacturing line according to claim 39, and wherein, described actuator arm (46) is carried by bar (47), and described bar can axially move, to make described cutter unit (14) cross motion.

41. according to the one or more described manufacturing line in claim 22 to 40, wherein, described collector unit (16) comprises multiple reel (17), and each described reel is specifically designed to the corresponding continuous strip linear element (2) of winding.