A two-stage closing method for roller extrusion equipment used to precisely adjust the gaps in the generated molding elements.

Abstract

A method for closing an apparatus (1) for extruding a molding section (2), the apparatus (1) comprising: a roller (3) supported by a bearing (4); a tool module (10) intended to engage with the roller (3) to form a gap (12) for molding the molding section (2); and at least a first die module (13) provided with a first extruder (14), the method comprising: an engagement step (s1) during which the tool module (10) is moved toward and tensioned toward the first bearing (4) in an engagement direction (Z) by a preload force (F_Z), followed by a clamping step (s2) during which the tool module (10) is clamped between the first die module (13) and a second die module (23) such that the first and second die modules (13, 23) are brought closer together on both sides of the tool module (10) and subjected to a clamping force (F_X) in a connection direction (X) transverse to the engagement direction (Z).

Description

Technical Field

[0001] This invention relates to the general field of extruders for manufacturing molding elements from one or more materials (such as rubber-based formulations), which are extruded and then shaped through a die.

[0002] The present invention relates more particularly to an extrusion apparatus and method capable of producing a molding element, the cross-section of which is defined by a gap defined on one hand by the outer surface of a roller rotatably mounted on a bearing, and on the other hand by a die whose shape substantially matches that of the roller.

[0003] This invention is particularly applicable to the manufacture of molded elements intended to form components of a pneumatic tire, such as the tread or sidewall. Background Technology

[0004] Many extrusion equipment structures already exist, particularly in which a tooling module (supplied by one or more extruders and carrying a die) is brought close to the outer surface of a rotatably mounted roller, thereby defining a gap between the die and the outer surface of the roller, the height of which corresponds to the thickness of the desired shaped element. As the shaped element is produced in the gap, it is advantageously conveyed through the roller, where it is gradually cooled and dimensionally stabilized.

[0005] However, especially due to the high pressure required to deliver the constituent materials of the molding element through the mold and the voids and to shape it, it is sometimes difficult to guarantee a perfect seal of the extrusion equipment, as well as the accuracy and regularity of the void height over time. Therefore, it is difficult to guarantee the thickness of the resulting molding element, especially when it is desirable to produce thin molding elements through particularly small voids.

[0006] In addition, known extrusion equipment is often bulky and sometimes difficult to reconfigure and clean when production changes (requiring die replacement to accommodate the layout and size of new molding elements to be produced). Summary of the Invention

[0007] Therefore, the subject matter related to this invention aims to overcome the above-mentioned shortcomings and propose a new extrusion method and a new extrusion device that allows for precise and robust adjustment of the extrusion void while being less sensitive to deformation under pressure.

[0008] The subject matter related to this invention also aims to provide an extrusion apparatus that allows convenient access to its components for reconfiguration or replacement operations required for production changes.

[0009] The subject matter related to this invention is achieved by implementing a method of an extrusion apparatus for producing molded elements, the extrusion apparatus comprising a roller, a tool module, and at least a first die module, the roller being rotatably supported by at least a first bearing, the tool module comprising a die designed to interact with the roller to form a cavity for shaping the molded element, the first die module having a first extruder designed to supply a first component material of the molded element to the tool module, the method being characterized in that it comprises:

[0010] - Engagement step (S1), during which the tool module moves relative to the first head module and the first bearing in a first direction, referred to as the "engagement direction," to bring the tool module abutting against the first bearing and subjecting the tool module to a preload force oriented relative to the first bearing in the engagement direction, so that the tool module is in a configuration relative to the roller, referred to as the "engagement configuration," which defines the desired clearance for producing the formed element.

[0011] -Then, in the clamping step (s2), during which, while the tool module is in its engagement configuration and the first bearing is prestressed by a preload, the tool module is clamped between a first head module having a first extruder and a second head module different from the first head module by moving the first head module and the second head module toward each other on both sides of the tool module in a second direction called the "connection direction," the second direction being transverse to the engagement direction and preferably perpendicular to the engagement direction, in such a way that the first extruder is connected to the tool module and the first and second head modules are subjected to a clamping force oriented in the connection direction, thereby holding the tool module by compression between the first and second head modules.

[0012] The subject matter related to this invention is also implemented by a corresponding device, which includes:

[0013] - A roller, which is rotatably supported by at least a first bearing.

[0014] - A tool module comprising a mold designed to interact with a roller to create a cavity that allows the forming element to be shaped.

[0015] - A first die head module, which carries at least a first extruder, the first extruder being designed to supply a first component material for the forming element.

[0016] The device is characterized in that it includes:

[0017] - A engagement device capable of moving a tool module relative to a first bearing and relative to a first die head module in a first direction, preferably vertical, referred to as the "engagement direction," thereby alternately bringing the tool module toward the roller until the tool module abuts against a mating stop rigidly fixed to the first bearing, subjecting the tool module to a preload force oriented relative to the mating stop and the first bearing in the engagement direction. This positions the tool module relative to the roller in an engagement configuration referred to as the "engagement configuration," which defines a desired clearance for producing the formed element, the clearance preferably being between 0.1 mm and 150 mm in radial consideration relative to the roller. Alternatively, the tool module can be moved away from the roller and the mating stop to place it in a disengagement configuration different from the engagement configuration.

[0018] -Second nose module

[0019] - A coupling device that enables the first and / or second die head modules to have their own mobility relative to the first bearing and relative to the tool module in a second direction, referred to as the "coupling direction," which is transverse to the engagement direction and preferably perpendicular to the engagement direction. Thus, the coupling device allows the first and second die head modules to be alternately brought closer together on both sides of the tool module in the coupling direction when the tool module is in the engagement configuration, thereby connecting the first extruder to the tool module and clamping the tool module between the first and second die head modules in a configuration referred to as a "closed configuration," or conversely, moving the first die head module away from the second die head module in the coupling direction, thereby disengaging the first extruder from the tool module and releasing the tool module to allow movement of the tool module relative to the bearing and relative to the first and second die head modules in the engagement direction.

[0020] Advantageously, the closing sequence proposed in this invention includes the abutment and pre-tightening of the tool module against the first bearing, which eliminates any assembly gaps and makes the position of the mold relative to the roller very precise and repeatable, thereby precisely defining the gap.

[0021] Furthermore, the preload force that prestresses the die against the rollers in the engagement direction can partially or even completely compensate for the effects of material pressure that occur during equipment operation and when one or more extruders convey material through the tool module and the void. Specifically, when material is extruded through the void, the predominant pressure in the void tends to push the die back relative to the rollers, i.e., tends to force the tool module back relative to the rollers in the engagement direction, while simultaneously increasing the void height that defines the thickness of the formed element by compressing the tool module in the engagement direction. In this case, the present invention, by providing preload that tends to force the tool module toward the rollers, and more particularly the die toward the surface of the rollers, produces an effect opposite to the pressure of the extruded material. Throughout the extrusion process, the void height is precisely and stably maintained at substantially the desired nominal value, preventing any deviation in the thickness of the produced formed element.

[0022] Advantageously, the lateral clamping applied to the tool module by the first and second head modules enhances the retention of the tool module in the appropriate, pre-tightened position (corresponding to the engagement configuration). Specifically, by clamping the tool module with jaws in this way, the first and second head modules, through friction, firmly prevent the tool module, and therefore the die, from moving backward relative to the rollers in the engagement direction into the disengagement configuration.

[0023] Therefore, the tool module is held particularly robustly and stably in the closed configuration, especially since the tool module can be sandwiched between the first and second head modules in the area particularly close to the gap and close to the first bearing.

[0024] Specifically, from a mechanical perspective, the force transmission chain that ensures the mold remains in a certain position relative to the first bearing and the roller can be schematically described by a virtual line, which is itself closed, passing sequentially through the first bearing, then through the first die head module (and subsequently, through the second die head module), and finally through the tool module carrying the mold. These different components, each with its own support point in contact with the others, constitute the points through which the force transmission chain passes.

[0025] However, because the tool module is clamped close to the gap between the first and second head modules, the force transmission chain is particularly short, and therefore only applicable to relatively small thicknesses of one or more solid materials (typically steel alloys) that constitute the first bearing, head module, and tool module.

[0026] Therefore, once placed in a closed configuration, the device is less, if not extremely, sensitive to deformations related to the inherent elasticity of the one or more solid materials constituting the first bearing, head module, and tool module.

[0027] Specifically, for a solid material with a certain elastic modulus, especially a certain Young's modulus under compression, the shorter the initial length of the part through which the chain transmitting the relevant force passes in the solid material, the higher the apparent stiffness of that part of the solid material (the elastic deformation behavior of the solid material block through which it passes is similar to that of a spring), and therefore the greater the overall stiffness of the corresponding assembly connection.

[0028] Therefore, the closer the clamping force applied to the tool module is to the gap, the less the die is pushed back under the pressure of the extruded material.

[0029] Furthermore, since the device according to the invention uses intersecting engagement and connection directions, the device advantageously allows the movement of the tool module to be separated from the specific movement of the die head module and the extruder carried by the die head module. By effectively distributing the die head module and its extruder relative to the tool module and relative to the rollers, the overall size of the device can be reduced in particular, while facilitating operator access to the extruder for cleaning and / or tool replacement operations.

[0030] In this regard, it is noted that by removing the first complete tool module that was initially in place and replacing it with another complete tool module according to the required production changes, the device according to the invention advantageously makes it possible to replace the tool module with a separate block. Attached Figure Description

[0031] Further subject matter, features, and advantages of the invention will become more apparent from the following description and with the aid of the accompanying drawings, which are provided by way of non-limiting illustration only, wherein:

[0032] Figure 1 An example of the device according to the invention in an open configuration is shown in a perspective view, in which the first and second die head modules (in this case, each carrying an extruder) move backward, maintaining a distance from the first bearing and the position provided for the tool module.

[0033] Figure 2 The image shows a cross-section viewed through a plane called the "coronal plane". Figure 1 In an open configuration, the coronal surface includes a joining direction and a connection direction, and in this case, the coronal surface is perpendicular to the rotation axis of the roller.

[0034] Figure 3 The image shows a cross-section viewed through a plane called the "sagittal plane". Figure 1 and Figure 2In this device, the sagittal plane is perpendicular to the coupling direction and includes the coupling direction and the axis of rotation of the roller; the sagittal plane divides the device into two substantially or even completely symmetrical parts.

[0035] Figure 4 Shown as a cross-section viewed through the second profile. Figure 1 and Figure 2 In the device, the second profile is parallel to the sagittal plane, and in this case, the second profile passes through the solid portion of the upper branch of the fixing hook, which is associated with the first head and arranged to engage with the first bearing to hold the first bearing under preload.

[0036] Figure 5 Displayed in 3D Figures 1 to 4 The device is pre-positioned according to a configuration in which the first and second head modules are moved toward each other on both sides of the position for the tool module, thereby defining a passage for the tool module between them, and wherein the respective fixing hooks of the first and second head modules are positioned facing the first bearing, in this case, above the lateral extension of the first bearing base, so as to form a stop designed to limit the movement of the first bearing in the engagement direction.

[0037] Figure 6 The image shows the pre-positioned configuration as viewed in cross-section through the coronal plane. Figure 5 The equipment.

[0038] Figure 7 Shown as a cross-section viewed through the sagittal plane Figure 5 and Figure 6 The equipment.

[0039] Figure 8 Detailed views of the cross-section through the second section are shown. Figure 5 and Figure 6 The device displays a gap called the "preload gap," which initially separates the first bearing from the stop formed by the retaining hooks of the first and second head modules in the engagement direction.

[0040] Figure 9 The device shown in the foregoing figure is in the approach phase at the end of the coronal plane, in which the tool module is brought into the space between the first and second head modules by moving in the engagement direction and comes into contact with the first bearing, thereby placing the mold at a distance from the roller that is suitable for the required clearance height.

[0041] Figure 10 Shown as a cross-section viewed through the sagittal plane Figure 9 The equipment.

[0042] Figure 11 Showing Figure 9 and Figure 10 A detailed view of the device in the second section shows that, on the one hand, the tool module has contacted the mating stop rigidly fixed to the first bearing, thereby carrying the first bearing; on the other hand, the preload gap separating the first bearing base and the retaining hook remains to form a travel reserve in the engagement direction so as to allow slight additional movement of the tool module and the entire first bearing during the subsequent preload phase.

[0043] Figure 12 This is a partial perspective view of the device in the aforementioned figure, in an engagement configuration produced during a pre-tightening phase following the approach phase. In this configuration, the tool module is positioned at a distance from the roller corresponding to the desired clearance, and a pre-tightening force is applied to the first bearing in the engagement direction, thereby pressing the base of the first bearing against the fixing hooks of the first and second head modules, which are still in a pre-positioning configuration.

[0044] Figure 13 It is observed through a cross-section of the coronal plane. Figure 12 A partial view of the device in an engaged configuration shows the action of a preload actuator with a ramp that applies pressure to the tool module and, through the tool module, to the first bearing, causing the first bearing to abut against the retaining hook and generating the required preload in the engagement direction. In this configuration, the preload actuator acts on a clamping area located at one end of the tool module, opposite the end carrying the mold, and interacts with the roller to create a gap.

[0045] Figure 14 It is observed through a cross-section of the sagittal plane. Figure 12 and Figure 13 A detailed view of the device shows the lifting of the first bearing under the thrust applied by the tool module moved by the preload actuator during the preload phase, and the guided translation of the first bearing along the two struts provided for this purpose in the engagement direction (vertical in this case).

[0046] Figure 15 This is observed through a cross-section of the second profile. Figures 12 to 14 A partial view of the device shows the elimination of preload clearance achieved by the action of a preload actuator, which pushes and holds the tool module in the engagement direction, and thus a first bearing driven by the tool module abuts against the retaining hook.

[0047] Figure 16A partial view through a cross-section of the coronal plane shows the device of the preceding claims in a closed configuration, in which a first die head module and a second die head module are brought against each other on both sides of the tool module to abut against the tool module, thereby applying a clamping force to the tool module to hold the tool module in its engaged configuration by clamping and to ensure a sealed connection between the extruder and the tool module, thereby enabling the material extruded from the extruder to be conveyed through the tool module to the die and voids to produce the desired molded element.

[0048] Figure 17 and Figure 18 The device shown in the aforementioned figure, viewed in cross-section through the second section, is in a closed configuration. Before and after the engagement of the stabilizing wedges, these wedges are respectively inserted between the base of the first bearing and a fixing hook, thereby preventing and driving the first bearing in a direction transverse to the axis of rotation of the roller and parallel to the coupling direction. In this way, the first bearing and the roller are laterally stabilized, and any bending movement of the support is prevented, thereby preventing any lateral movement of the roller relative to the mold during the operation of producing the molding element.

[0049] Figure 19 yes Figure 18 A partial perspective view of the device, showing a stabilizing wedge engaging between a first bearing and a fixing hook carried by the first and second head modules.

[0050] Figure 20 Showing Figure 18 and Figure 19 A top view of the equipment.

[0051] Figure 21 and Figure 22 The aforementioned device, as shown in partial cross-sections through the coronal and sagittal planes, is in a closed configuration during the extrusion molding of elements.

[0052] Figure 23 The device shown in the aforementioned figure, viewed in cross-section through the coronal plane, is in the first reopening phase, in which the first and second die head modules move away from each other in order to separate them from their respective extruders from the tool module.

[0053] Figure 24 The device shown in the aforementioned figure, viewed in cross-section through the coronal plane, is in the second reopening phase, in which the tool module moves away from the roller (in this case, by lowering the tool module) to allow the tool module to enter a disengaged configuration.

[0054] Figure 25The device shown in the aforementioned figure, viewed in cross-section through the coronal plane, is in the third and final reopening phase, in which the preloaded actuator retracts (in this case, retracts into the first and second head modules), thus returning to... Figure 1 The open configuration shown.

[0055] Figure 26A , Figure 26B and Figure 26C The locking mechanism is shown in a three-dimensional detailed view, depicting the sequential implementation steps, and is particularly suitable for applications based on... Figures 1 to 25 The device, wherein the locking mechanism includes first and second jaws, which respectively engage on a first head module and a second head module to force the first and second head modules to move toward each other and generate a clamping force exerted by the head modules on the tool module.

[0056] Figure 27 A detailed view above a cross-section of a plane is shown, in this case perpendicular to the engagement direction Z and including the engagement direction and the direction of movement of the jaws, referred to as the "locking direction." A bevel provided on a branch of the first jaw engages with a corresponding anti-bevel provided in the first and second head modules. The inclination of the bevel and anti-bevel allows the force causing the jaws to close due to the locking direction to be converted into a clamping force transverse to the locking direction due to the engagement direction, and allows the first and second head modules to be forced to move toward each other in compression against the tool module. Detailed Implementation

[0057] This invention relates to an extrusion apparatus 1 for producing molded components 2 (in... Figure 21 and Figure 22 (shown schematically in dashed lines) and a method for implementing such an apparatus 1, which is particularly capable of preparing such an extrusion apparatus 1 for the production of such a molded element 2.

[0058] In a manner known to itself, and Figure 1 , Figure 2 and Figure 21 As can be seen particularly clearly, the extrusion equipment 1 includes rollers 3.

[0059] The roller 3 has a shape that rotates around the central axis Y3, and preferably has a straight cylindrical shape.

[0060] The radial outer surface of the roller 3 serves as a receiving surface 3A, used to receive, cool, and dimensionally stabilize the molded element 2 during production.

[0061] To better manage the heat of the forming element 2, and especially to better manage the cooling of the forming element, the roller 3 may have a thermal conditioning system, including, for example, a heat-conducting liquid circulation channel, which specifically enables the cooling of the roller.

[0062] The roller 3 is supported by at least the first bearing 4 and rotates about its central axis Y3.

[0063] More preferably, the roller 3 includes a first axial extension portion 6 and a second axial extension portion 7 that protrude axially relative to the receiving surface 3A on both sides of the receiving surface 3A, the first axial extension portion 6 and the second axial extension portion 7 embodying the central axis of rotation Y3.

[0064] The first axial extension 6 interacts with the first bearing 4 in a pivotal connection manner.

[0065] Similarly, the second axial extension 7 interacts with the second bearing 5 in a pivotal connection manner. The presence of the two bearings 4, 5 arranged axially on both sides of the roller 3 provides the roller 3 with particularly robust, balanced and stable rotational guidance.

[0066] The following observations relating to the first bearing 4, particularly the description of its arrangement, function, and movement, can be advantageously adapted to the second bearing 5 with necessary modifications.

[0067] For example, the roller 3 may preferably have a diameter between 0.5m and 10m, such as between 0.90m and 3m.

[0068] By convention, the coronal plane (denoted as PF) is considered to be a plane that is perpendicular to the roller axis Y3 and intersects the roller 3 at its midpoint (i.e., the axial midway between the first axial extension 6 and the second axial extension 7).

[0069] Similarly, by convention, the sagittal plane (denoted as PS) is considered to be a plane perpendicular to the coronal plane PF and containing the axis Y3 of roller 3.

[0070] Preferably, device 1 is arranged such that the coronal plane PF and sagittal plane PS are vertical.

[0071] The device 1 also includes a tool module 10, which includes a mold 11 designed to interact with the roller 3, and more particularly with the receiving surface 3A of the roller 3, thereby forming a gap 12 that allows the forming element 2 to be formed.

[0072] For this purpose, the mold 11 preferably has an end face 11A that partially covers the roller 3 in a predetermined angular sector around the central axis Y3 of the roller, and has a concave curved shape relative to the central axis Y3 of the roller, which substantially matches the shape of the receiving surface 3A of the roller. Preferably, the end face 11A has a straight cylindrical shape centered on the central axis Y3.

[0073] The height H12 of the gap 12 is specified as the maximum distance that separates the end face 11A of the die from the receiving surface 3A of the roller in the region where the die 11 and the roller 3 overlap, considering radially (and thus perpendicular to the receiving surface 3A of the roller) relative to the central axis Y3, in order to form a wall intended to contact the extruded material, thereby defining the thickness H2 of the forming element 2.

[0074] In practice, by convention, the height H12 of the gap 12 is considered to correspond to the maximum height observed at the exit of the gap 12 (i.e., at the position where the mold 11 is interrupted and therefore no longer covers the receiving surface 3A of the roller 3 in the orientation direction around the central axis Y3) over the width of the gap 12, as particularly in Figure 9 , Figure 10 , Figure 13 , Figure 14 , Figure 21 and Figure 22 It can be seen in the image.

[0075] As in Figure 3 , Figure 10 , Figure 14 and Figure 22 As can be seen, the useful width W11 of the die end face 11A considered in the axial direction (i.e., in the direction of the roller central axis Y3) (i.e., the die end face 11A will define the width of the gap 12 together with the roller receiving surface 3A, through which the extruded material constituting the forming element passes, and therefore the gap 12 will contact the extruded material to define the cross-section of the forming element 2, and thereby define the width W2 of the forming element 2, as particularly in Figure 22 As can be seen in the image, it preferably covers at least 50% of the useful axial width W3 (i.e., the axial width of the roller receiving surface 3A), for example, between 50% and 90%.

[0076] The device 1 further includes at least a first die head module 13, which carries at least a first extruder 14 for supplying a first component material for the forming element 2.

[0077] The first extruder 14 preferably includes a screw 15 that rotates within a sleeve 16 about its longitudinal axis X15, the sleeve 16 being fixed to the first die head module 13.

[0078] The sleeve 16 preferably has an inlet 16_in (e.g., in the form of a hopper) in the upstream portion for introducing the material to be processed, and a downstream outlet 16_out in the downstream portion for allowing the material processed by the screw 15 of the extruder to leave the sleeve 16.

[0079] The outlet 16_out is arranged as follows (specifically, as shown in the image). Figure 21 The material (shown) can be positioned in sealed communication with the tool module 10 so that the material extruded by the extruder 14 can be conveyed to the die 11 via one or more channels 17 provided in the tool module 10 for this purpose.

[0080] The molding element 2 is preferably made of at least one rubber-based material (or "compound").

[0081] In one possible application, the molding element 2 will be formed from a single layer of a single homogeneous material based on rubber.

[0082] In another possible application, the molding element 2 is preferably made of a variety of rubber-based materials with different compositions, each of which is processed by at least one dedicated extruder 14, 24, fed through tool module 10, and then assembled, arranged and shaped into molding element 2 by die 11 and void 12 according to the desired design.

[0083] Of course, the composition of the various materials arranged side by side on the straight cross-section of the molding element 2, as well as the position and size of the materials on the straight cross-section of the molding element, will be predetermined according to the purpose of the molding element 2.

[0084] In this regard, it should be noted that the molding element 2 is preferably intended to form components of the pneumatic tire, such as the tread, sidewall, or even (especially if the molding element is particularly thin) a liner intended to form the interface between two stacked layers within the pneumatic tire.

[0085] The molding element 2 is advantageously produced continuously in its length direction, which defines a direction referred to as the "longitudinal direction" L2.

[0086] Preferably, when the extruded forming element 2 is conveyed on the roller 3, the longitudinal direction L2 is parallel to the coronal plane PF and is preferably contained within the coronal plane PF.

[0087] On the cross section perpendicular to the longitudinal direction L2, from Figure 22As can be seen, the forming element 2 has a first dimension W2 and a second dimension H2. The first dimension W2 is considered in a direction parallel to the central axis Y3 of the roller 3 and corresponds to the width W2 of the forming element. The second dimension H2 is considered in a radial direction relative to the central axis Y3 and is therefore perpendicular to the receiving surface 3A of the roller and corresponds to the thickness H2 of the forming element 2.

[0088] The thickness H2 of the forming element is defined by the height H12 of the gap, taking into account any expansion related to the release of pressure stress at the gap exit. The thickness H2 of the forming element (after completion and stabilization) can typically be between 50% and 200% of the height H12 of the gap 12 considered at the exit of the gap 12 (i.e., at the position where the mold 11 no longer covers the receiving surface 3A of the roller 3) (especially if the speed of the roller 7 causes the forming element 2 to be stretched at the mold exit).

[0089] It should be noted that, due to the precision provided by the present invention in the mechanical definition of the gap 12, it is possible to produce molded elements 2, especially molded elements of a single material, which are particularly thin, for example, with a final thickness H2 between 0.1 mm and 0.5 mm.

[0090] However, more generally, molded elements 2 with a wide range of thicknesses can be produced, for example, the thickness H2 of the molded element is between 0.1 mm (corresponding to the thinnest thickness achievable by the device where applicable) and 150 mm (corresponding to the maximum thickness achievable by the device 1 where applicable).

[0091] For example, the width of the forming element W2 (strictly greater than its thickness H2) can be between 1 cm and 150 cm. Where applicable, if the unit width W2 of the forming element 2 allows, especially for forming elements with a width between 1 cm and 10 cm or even 20 cm, several independent forming elements 2 can be extruded simultaneously, side by side and parallel through the same tool module 10 and the same roller 3.

[0092] When the molded element 2 has a particularly thin thickness H2 between 0.1 mm and 0.5 mm as described above, the width W2 of the molded element can be between 1 mm and 150 mm. In the case of a very thin molded element, the ratio W2 / H2 between the width W2 and the thickness H2 can therefore preferably be between 100 and 3000 times.

[0093] According to the invention, the method includes an engagement step (s1), which constitutes a "first stage" in the closing sequence, in which the tool module 10 moves relative to the first head module 13 and the first bearing 4 in a first direction Z, referred to as the "engagement direction" Z, thereby bringing the tool module 10 abutting against the first bearing 4. Figure 9 , Figure 10 , Figure 11 In this case, the tool module 10 is thus brought into contact with the bearing 4 carrying the roller 3, and the tool module 10 is subjected to a preload force F_Z, which is along the engagement direction Z and oriented relative to the first bearing 4. Figure 12 , Figure 13 , Figure 14 , Figure 15 In this way, the tool module 10 is positioned relative to the roller 3, and in particular, the end face 11A of the mold 11 is positioned relative to the receiving surface 3A of the roller 3, in a configuration called a “joint configuration” that defines the required gap 12 for producing the molded element 2.

[0094] This type of engagement configuration with preload F_Z is in Figures 13 to 15 Implemented in, and then Figure 16 as well as Figure 21 and Figure 22 Maintain, Figure 16 This corresponds to the clamping step (s2), which will be described in detail below. Figure 21 and Figure 22 This corresponds to the operation of extruding the molding element 2.

[0095] For the engagement step (S1), the device 1 includes an engagement device 19, which allows the tool module 10 to be moved relative to the first bearing 4 and relative to the first head module 13 in a first direction called the "engagement direction" Z (the aforementioned first direction Z), so that the engagement can be performed alternately:

[0096] - To orient the tool module 10 toward the roller 3, in this case, by engaging movement denoted as MZ+, until the tool module 10 abuts against the mating stop 18 rigidly fixed to the first bearing 4. Figure 9 and Figure 10 ), and subject the tool module 10 to a preload force F_Z ( Figure 13 and Figure 14 The preload F_Z is oriented in the engagement direction Z and relative to the mating stop 18 and the first bearing 4, thereby positioning the tool module 10 relative to the roller 3, and in particular, positioning the end face 11A of the die 11 relative to the receiving surface 3A of the roller 3, in a configuration referred to as the "engagement configuration". Figures 13 to 15 And then there is Figure 16 , Figure 21 and Figure 22 This configuration defines the required clearance 12 for producing the molded element 2.

[0097] - Or conversely, the tool module 10 is moved away from the roller 3 and the docking stop 18, in this case by a move away denoted as MZ-, so as to place the tool module in a disengaged configuration ( Figures 1 to 6 , Figure 24 and Figure 25 ), which is different from the joint configuration.

[0098] Advantageously, the docking stop 18 will ensure the accuracy and repeatability of the height H12 of the selected gap 12.

[0099] Preferably, for the production of thin molded elements, particularly those with a final thickness between 0.2 mm and 0.3 mm after cooling and stabilization, the resulting gap 12 in the joining configuration will have a radially sized height H12 relative to the roller 3, which is between 0.1 mm and 150 mm, for example, between 0.1 mm and 0.5 mm. In this respect, it can be recalled that the thickness of the molded element 2 can be varied and adjusted in a controlled manner as appropriate, depending on both the extent to which longitudinal stretching of the molded element 2 is applied with the roller 3, which tends to reduce the thickness of the molded element, and the natural tendency of material "propagation" (i.e., volume increase), which spontaneously increases the thickness once the molded element emerges from the gap 12.

[0100] In the disengagement configuration, the distance DZ between the receiving surface 3A of the roller and the end face 11A of the die, and more preferably, the minimum distance measured in the engagement direction Z that separates the receiving surface 3A from the end face 11A of the die (as shown in...). Figure 24 As can be seen in particular, the distance will be significantly greater than that observed in the engagement configuration, and preferably equal to or greater than 20 cm, or even equal to or greater than 50 cm, so that the tool module 10 is sufficiently rearward away from the roller 3 so as to facilitate easy access to the receiving surface 3A of the roller 3 and, if necessary, to clean the roller 3 and / or to facilitate easy cleaning or replacement of the tool module 10.

[0101] Preferably, the junction direction Z is contained in the sagittal plane PS, and more preferably, it corresponds to the intersection of the coronal plane PF and the sagittal plane PS.

[0102] Preferably, the engagement direction Z is vertical, or at least substantially vertical, for example, within an inclination range of +10 degrees to -10 degrees relative to the vertical direction.

[0103] Thus, engaging the movement MZ+ or disengaging the movement MZ- preferably corresponds to the primary or even complete vertical movement, typically a vertical translational movement.

[0104] Preferably, the engagement movement MZ+ or the distance movement MZ- is a linear translational movement parallel to the engagement direction Z.

[0105] The engagement device 19 may include any conveying mechanism 20 that allows the tool module 10 to be conveyed from its disengagement configuration to its engagement configuration, and vice versa, preferably in a linear translation in the engagement direction Z.

[0106] Preferably, the engagement device 19 includes a conveying mechanism 20 formed by the elevator 20, which allows the tool module 10 to be conveyed in the vertical engagement direction Z to perform an upward forward movement (engagement movement MZ+) by raising the tool module 10 toward the roller 3, or conversely, to perform a downward backward movement (retreat movement MZ-) by lowering the tool module 10 away from the roller 3 and the docking stop 18 of the first bearing 4. For ease of description only, the conveying mechanism 20 will be equivalent to the elevator 20 described below.

[0107] Furthermore, the engagement device 19 preferably includes at least one, preferably two, preload actuators 21, 22, arranged to increase the compressive force applied by the tool module 10 to the docking stop 18 of the first bearing 4 when the tool module 10 contacts the docking stop 18, and thus more generally the compressive force applied to the first bearing 4, thereby generating the required preload force F_Z, such as... Figure 13 and Figure 14 As shown.

[0108] like Figure 9 , Figure 13 and Figure 16 As shown, these preload actuators 21, 22 may preferably include inclined sliders mounted to be movable in a direction transverse to the engagement direction Z, for example by an actuating cylinder or any other suitable motorization system, and by performing forward movement (in... Figure 13 In this context, FM_21 and FM_22 are used in conjunction with tool module 10.

[0109] Preferably, for the sake of compactness and stability of the device, the preloaded actuators 21, 22 are engaged with the tool module 10 via a base or "tail end" located at the end opposite to the end with the mold 11.

[0110] Furthermore, preferably, the elevator 20 on one side and the preload actuators 21, 22 on the other side are arranged to have different and complementary functions. The elevator 20 is able to move the tool module 10 in the engagement direction Z within a predetermined maximum stroke limit (referred to as "large stroke"), sufficient to move the tool module 10 from its disengagement configuration into the configuration where the tool module 10 contacts the docking stop 18. The preload actuators 21, 22 then take over and continue engagement movement MZ+ in the same engagement direction Z. The stroke of MZ+ will be strictly smaller than that of the elevator 20, but it can generate strong stress on the tool module 10 and the docking stop 18, for example, to achieve the required preload force F_Z.

[0111] In other words, as will be described in detail below, the elevator 20 preferably performs the first stage of the engagement step (s1), corresponding to the approach stage (s1_1), providing most of the movement required for the engagement movement MZ+, but only generating a relatively mild preload stress, lower than the target preload force F_Z. The preload actuators 21, 22 will complete the engagement step (s1) by performing a second stage (referred to as the "preload stage" (s1_2)), which has a lower ability to move the tool module 10 in the engagement direction Z, but a stronger ability to generate stress in the engagement direction Z, thereby enabling the desired strength of the preload force F_Z to be achieved.

[0112] Preferably, in order to ensure that the preload actuators 21 and 22 can operate independently of the elevator 20 (and vice versa), the preload actuators 21 and 22 will be different from the elevator 20 and will be supported by the head module 13 and 23.

[0113] For example, the preload F_Z is preferably between 300kN and 1500kN, which is approximately equivalent to 30 to 150 tons. For instance, the preload could be approximately 600kN, or about 60 tons.

[0114] Advantageously, such preload strength allows the tool module 10 and its die 11 to generate sufficient preload on the first bearing 4, and thus on the roller 3 carried by the first bearing 4, so that the effects of the pressure stress generated in the void 12 by the extruded material flow during the production of the molding element 2 can be at least partially or even completely offset.

[0115] According to the invention, after the engagement step (s1), the method then includes a clamping step (s2) constituting a "second stage" in the closing sequence, during which, while the tool module 10 is in its engagement configuration, the first bearing 4 is prestressed by a preload force F_Z, as... Figures 12 to 15As shown, by moving the first head module 13 and the second head module 23 toward each other on both sides of the tool module 10 in a second direction called the "connection direction" X, the tool module 10 is clamped (e.g., Figure 16 As shown, between a first head module 13 having a first extruder 14 and a second head module 23 different from the first head module 13, the second direction is transverse to the engagement direction Z, preferably perpendicular to the engagement direction Z, in such a way that the first extruder 14 is connected to the tool module 10 and the first and second head modules 13, 23 are subjected to a clamping force F_X oriented in the engagement direction X, thereby holding the tool module 10 by compression between the first head module 13 and the second head module 23.

[0116] Advantageously, the tool module 10 is thus firmly clamped in the jaws between the first head module 13 and the second head module 23, each pressing against the tool module 10 and facing each other in the coupling direction X. The tool module 10 is thus firmly clamped in a fixed position relative to the first bearing 4 and the central axis Y3 of the roller by the first and second head modules 13, 23, which allows the arrangement of the gap 12 to remain unchanged during the production of the forming element 2.

[0117] Specifically, due to the robust clamping of the tool module 10 provided by the present invention, the dimensions of the gap 12, particularly the height H12 of the gap, are almost insensitive to the pressure intensity at which the material is conveyed from the mold 11 into the gap 12, and therefore remain almost or even completely unchanged during the extrusion process, thereby enabling the production of the forming element 2. Thus, the forming element 2 is highly regular, particularly in terms of its thickness H2.

[0118] As will be described in detail below, the device 1 includes a coupling device 29 that allows the first head module 13 and / or the second head module 23 to have their own movement relative to the first bearing 4 and relative to the tool module 10 in the coupling direction X (transverse to the engagement direction Z).

[0119] "Horizontal" or "lateral orientation" in this general sense refers to a direction that is inclined (preferably perpendicular) to a reference direction.

[0120] More specifically in this case, the joining direction Z and the connecting direction X will meet and will be substantially perpendicular, that is, they will form an angle between 70 and 110 degrees, preferably between 80 and 100 degrees, preferably between 85 and 95 degrees, or even more preferably completely perpendicular, that is, they will form an angle equal to 90 degrees.

[0121] Furthermore, the connection direction X is preferably contained within the coronal plane PF. Even more preferably, the coronal plane PF is a plane defined by the engagement direction Z and the connection direction X.

[0122] By convention, Y represents a direction parallel to or even coinciding with the axis of roller Y3, and forms a rectangular trihedron with the connecting direction X and the joining direction Z.

[0123] It should be noted that, advantageously, the use of intersecting, preferably perpendicular, connection directions X and engagement directions Z allows the various components of the device 1 (particularly including the lift 20, which enables the engagement device of the tool module 10 to move, the die head modules 13, 23, their respective extruders 14, 24, and their connection devices 29) to be distributed in different directions in space (relative to the roller 3 and the gap 12) around a position called the "core position" 60 (the position occupied by the tool module 10 in the engagement configuration). Therefore, the compactness of the device 1 can be optimized simultaneously while ensuring good accessibility of the various components of the device 1.

[0124] Furthermore, this arrangement allows the engagement device 19 and the coupling device 29 to each contribute to holding the tool module 10 in its engagement configuration. Thus, the holding of the tool module 10 can be strengthened by combining the effects of actuators distributed and acting in different directions, but these actuators together contribute to maintaining the required configuration of the gap 12 to resist the pressure of the extruded material, and more particularly to giving the tool module 10 the ability to resist being moved back from the roller 3.

[0125] Furthermore, the connection direction X is preferably substantially or even completely horizontal, especially when the engagement direction Z is substantially or even completely vertical. Therefore, the connection direction X preferably forms an angle of less than 20 degrees with respect to the horizontal plane, more preferably less than 10 degrees, more preferably less than 5 degrees, or even 0 degrees.

[0126] The horizontality of the connection direction X will advantageously provide great stability and can limit the energy consumption of the first head module 13 and / or the second head module 23, which are particularly heavy components, during movement.

[0127] This arrangement also facilitates access to the extruder 14 for cleaning or material supply, because, in particular, the first die head module 13 and its extruder 14 remain at a substantially constant height as they move in the coupling direction X, thus placing them at the operator's working height.

[0128] Furthermore, the second head module 23 preferably has features similar to or even the same as those of the first head module 13.

[0129] Therefore, preferably, as in Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 9 , Figure 13 , Figure 16 , Figure 20 , Figure 21 and Figures 23 to 25 As can be seen, the second die head module 23 carries the second extruder 24, which is designed to deliver a second material to the cavity 12 through the tool module 10 and the die 11. The second material preferably has a different composition from the first material delivered by the first extruder 14, and is preferably based on rubber.

[0130] The second extruder 24 preferably includes a screw 25 rotatably mounted in a second sleeve 26 about its longitudinal axis X25, the second sleeve 26 being fixed to a second die head module 23 and having an inlet 26_in and an outlet 26_out.

[0131] The longitudinal axis X25 of the second extruder 24 is preferably collinear (parallel) with the longitudinal axis X15 of the first extruder 14, or even coaxial with the longitudinal axis X15 of the first extruder 14.

[0132] exist Figure 1 , Figure 2 , Figure 6 , Figure 13 , Figure 16 and Figure 21 Specifically, it can be seen that the first die head module 13 advantageously has an end face 13A called the “first connecting surface” 13A (or the “first downstream surface”), on which the outlet 16_out of the sleeve 16 of the first extruder 14 is open, and the end face 13A is arranged to be in sealing contact with a corresponding surface 10A of the tool module 10 (called the “first receiving surface” 10A) when the device is in a closed configuration. The shape of the corresponding surface 10A matches the shape of the first connecting surface 13A, and when facing the outlet 16_out of the sleeve 16, it has an inlet forming the entrance to a corresponding channel 17, which then continues through the tool module 10 to the die 11, and the channel 17 leads through the die 11 to the gap 12.

[0133] Similarly, the second die head module 23 has an end face 23A called the “second connecting surface” 23A (or the “second downstream surface”), on which the outlet 26_out of the sleeve 26 of the second extruder 24 is open, and the end face 23A is arranged to be in sealing contact with the corresponding surface 10B of the tool module 10 (called the “second receiving surface” 10B) when the device is in a closed configuration. The second receiving surface 10B is opposite to the first receiving surface 10A in the connection direction X relative to the sagittal plane PS. The second receiving surface 10B has a shape that matches the shape of the second connecting surface 23A and has an inlet facing the outlet 26_out of the sleeve 26 to form the entrance of the corresponding channel 17.

[0134] It should be noted that the first extruder 14 and the second extruder 24 preferably each feed material to different channels 17 within the tool module 10, such that the first material from the first extruder 14 and the second material from the second extruder 24 flow to the die 11 respectively, without the materials combining or mixing before reaching the die 11, and more preferably without the materials combining or mixing before reaching the gap 12.

[0135] Preferably, the first connecting surface 13A and the first receiving surface 10A are flat. Preferably, these surfaces 13A, 10A form an angle of less than 20 degrees, less than 10 degrees, or even less than 5 degrees with respect to a plane perpendicular to the connecting direction X (and therefore preferably with respect to the joining direction Z), or, even more preferably, they are perpendicular to the connecting direction X (and therefore, preferably, parallel to the joining direction Z, and therefore preferably vertical).

[0136] Similarly, the second connecting surface 23A and the second receiving surface 10B are flat. Preferably, these surfaces 23A and 10B form an angle of less than 20 degrees, less than 10 degrees, or even less than 5 degrees with respect to a plane perpendicular to the connecting direction X, or, even more preferably, they are perpendicular to the connecting direction X.

[0137] Preferably, in order to simplify the layout of the device 1, especially the layout of the engagement device 19, and to ensure good stability in the closed configuration, the first and second receiving surfaces 10A, 10B are parallel to each other and preferably parallel to the engagement direction Z. The first and second receiving surfaces 10A, 10B define the tool module 10 in the connection direction X, and one or more channels 17 for conveying one or more compounds extruded from one or more extruders 14, 24 are located between them.

[0138] Similarly, the first connecting surface 13A of the first head module 13 and the second connecting surface 23A of the second head module 23 are preferably parallel to each other and preferably parallel to the engagement direction Z.

[0139] According to a possible preferred combination of the above features, corresponding to the alternative embodiments illustrated in the figures, tool module 10 is defined in the connection direction X by a first receiving surface 10A and a second receiving surface 10B. First die head module 13, in a closed configuration, is intended to abut against the first receiving surface 10A, thereby connecting the first extruder 14 to tool module 10 and applying a clamping force F_X. Second die head module 2, in a closed configuration, is intended to abut against the second receiving surface 10B, thereby applying a clamping force F_X. The first and second receiving surfaces 10A and 10B are flat and... Each of the receiving surfaces 10A and 10B is oriented relative to the engagement direction Z such that the angle between the receiving surfaces 10A and 10B and the engagement direction Z is less than 10 degrees, preferably less than 5 degrees, and preferably zero. Thus, the first and second receiving surfaces 10A and 10B are substantially or even preferably completely parallel to each other and substantially or even completely parallel to the engagement direction Z. The connecting direction X is formed relative to the engagement direction Z, and more preferably relative to the first and second receiving surfaces 10A and 10B, at an angle between 70 and 110 degrees, preferably between 80 and 100 degrees, and even more preferably equal to 90 degrees.

[0140] Advantageously, the mating surfaces along which the tool module 10 is sealed in the closed configuration are preferably flat surfaces, parallel to each other and parallel to the mating direction Z, and perpendicular to the coupling direction X. This simplifies opening and closing movements and increases stability in the closed configuration.

[0141] Furthermore, in the case where the first extruder 14 includes at least one screw that rotates about its longitudinal axis X15 in the sleeve 16, as described above, the longitudinal axis X15 is preferably parallel to the connection direction X within + / -10 degrees, more preferably + / -5 degrees, and more preferably completely parallel to the connection direction X.

[0142] Advantageously, this arrangement particularly optimizes the volume of the equipment 1 and the accessibility of cleaning operations for the first extruder 14. The arrangement also simplifies and enhances the stability of movement of the extruder 14 and the associated die head module 13 in the coupling direction X, as these movements FM_13, BM_13 take the form of longitudinal translation of the extruder 14, thereby minimizing the floor area covered by the extruder during these movements.

[0143] Advantageously, the channels 17 of the tool module 10 preferably each have at least one angled member (bend), comprising an upstream section and a subsequent downstream section, the upstream section extending substantially or even completely parallel to the engagement direction X and allowing them to capture extruded material from the sleeve 16 through their inlet (directly in the axial extension of the sleeve 16 and screw 15), the downstream section being substantially parallel to the engagement direction Z and forming an angle with the upstream section, preferably a right angle in this case, to guide the extruded material flow toward the void 12 and the roller 3, the flow direction of which is substantially or even completely parallel to the engagement direction Z.

[0144] Preferably, the tool module 10 includes a plurality of plates stacked along their thickness direction in the engagement direction X, with their larger surfaces being flat and parallel to the first receiving surface 10A and the second receiving surface 10B, and thus preferably parallel to the engagement direction Z. Preferably, the visible surface of the first stacked plate forms the first receiving surface 10A, while the visible surface of the last stacked plate forms the opposite second receiving surface 10B.

[0145] Therefore, each channel 17 is hollowed out in the thickness of one sheet or in the respective thickness of two adjacent sheets to form a groove with a blind bottom. The recess of the groove opens at the surface of the sheet in question, i.e., its recess opens in the mating surface with the adjacent sheet, such that once the sheets come into contact with each other, the cross-section of the channel through which the extruded material is intended to flow is defined by the two stacked sheets surrounding the channel 17 in a closed profile.

[0146] Of course, each entrance of channel 17 will traverse as much plate thickness as possible from the relevant receiving surfaces 10A, 10B as needed to reach the depth of the plate in which channel 17 is hollowed out.

[0147] The die 11 is advantageously located on one face of the sheet stack, more typically on one face of the tool module 10, which intersects or is even perpendicular to the receiving faces 10A, 10B. In this case, the die 11 is located at the upper edge of the tool module 10 and is open. The curvature angle of the channel 17 advantageously allows each extruded material to be transferred from the relevant receiving faces 10A, 10B to the die 11 and its end face 11A.

[0148] Advantageously, in the closed configuration, the clamping force F_X presses the plates together in their thickness direction.

[0149] This sandwiching of the sheet metal stacks via the connecting surfaces 13A, 23A of the first and second die head modules 13, 23 is particularly advantageous when the sandwiching occurs in a region of the tool module 10 (which preferably covers more than half the length of the channel 17 considered in the Z-direction of the engagement direction, preferably more than 75% of the length of the channel 17, or even the entire length of the channel 17 considered in the Z-direction of the engagement direction), allowing the tool module 10 to be particularly stably secured and ensuring a perfect seal of the tool module 10, especially by resisting any separation between the sheets at the interface formed between the individual sheets at the connecting surfaces (under the pressure of the extruded material flowing in the channel 17).

[0150] According to the corresponding Figures 1 to 25 One possible arrangement of the first alternative device shown is that the first die head module 13 (preferably each of the first and second die head modules 13, 23) can carry one and only one extruder 14, 24.

[0151] However, as Figure 26A , Figure 26B , Figure 26C In the second alternative device 1 shown, the first die head module 13 and / or, similarly, the second die head module 23, can carry several extruders, so it is preferable to feed as many individual channels 17 as possible within the tool module 10.

[0152] Each extruder 14, 24 preferably has an opening on the connection surface 13A, 23A of the head module 13, 23 carrying the extruder, opposite to the inlet of the inlet of the corresponding channel 17 provided in the tool module 10. In this respect, each head module 13, 23 preferably includes as many channels (preferably separate from each other) connecting the sleeves 16, 26 of the extruder to its connection surface 13A, 23A, because the head modules 13, 23 can have separate extruders 14, 24.

[0153] To implement the second clamping step (s2), in addition to the second head module 23 described above, the device 1 also includes a coupling device 29, which allows the first head module 13 and / or the second head module 23 to have their own movement relative to the first bearing 4 and relative to the tool module 10 in a second direction. In this case, the second direction is referred to as the "coupling direction" X described above, which is transverse to the engagement direction Z and preferably perpendicular to the engagement direction Z. Therefore, the coupling device 29 allows for alternating operation:

[0154] When the tool module 10 is in the engagement configuration, the first die head module 13 and the second die head module 23 are brought close to each other on both sides of the tool module 10 in the engagement direction X, thereby connecting the first extruder 14 (or the second extruder 24, if applicable) to the tool module 10 and sandwiching the tool module 10 between the first die head module 13 and the second die head module 23, in a configuration referred to as the "closed configuration".

[0155] - Alternatively, the first die head module 13 is moved away from the second die head module 23 in the engagement direction X, thereby disengaging the first extruder 14 or the second extruder 24 from the tool module 10 and releasing the tool module 10, so that the tool module 10 moves in the engagement direction Z relative to the bearing 4, preferably also relative to the second bearing 5, and relative to the first and second die head modules 13 and 23.

[0156] According to an alternative implementation, it is conceivable that only one head module 13, 23 is movable relative to the first bearing 4 and relative to the tool module 10 in the coupling direction X, while the other head module 23, 13 is fixed in the coupling direction X, such that the movement of the single movable head module 13 relative to the tool module 10 and the other fixed head module 23 is sufficient to achieve a closed configuration and generate a clamping force F_X.

[0157] However, preferably, the coupling device 29 allows each of the first and second head modules 13, 23 to have its own mobility in the coupling direction X, relative to the first bearing 4 (and similarly relative to the second bearing 5) and relative to the tool module 10.

[0158] In this way, the first head module 13 located on the first side of the sagittal plane PS can move in the connection direction X, preferably by linear translation in the connection direction X, thereby being able to move alternately toward the sagittal plane PS, the tool module 10, and the second head module 23 until it can move forward by FM_13 ( Figure 6 ) engages with the tool module 10, or by moving BM_13 backward ( Figure 23 The first head module 23 moves away from the sagittal plane PS, tool module 10, and second head module 23, specifically disengaging from tool module 10. Similarly, the second head module 23, located on the other side of the sagittal plane PS, can also move in the connection direction X, preferably linearly in the connection direction X, and preferably independently of the movement of the first head module 13. This allows it to move alternately toward the sagittal plane PS, tool module 10, and first head module 13 until it can move by a forward movement FM_23 opposite to the forward movement FM_13 of the first head module 13. Figure 6) engages with the tool module 10, or conversely, by a backward movement BM_23 opposite to the backward movement BM_13 of the first head module 13. Figure 23 It moves away from the sagittal plane PS, tool module 10 and first head module, and in particular, disengages from the tool module.

[0159] It should be noted that the forward movement FM_13, FM_23 or the backward movement BM_13, BM_23 of the first and second head modules 13, 23, although preferably independently controllable from one head module 13 to the other head module 23, are preferably synchronized, especially during closure, so that the first head module 13 and the second head module 23 preferably move simultaneously, substantially mirror each other with respect to the sagittal plane PS, and thus the movement is carried out in a mutually opposing manner.

[0160] Preferably, as in Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 9 , Figure 12 , Figures 16 to 18 , Figure 20 and Figures 23 to 25 As can be clearly seen, the connecting device 29 includes at least a first carriage 30, which carries the first head module 13, or is even integrated with the first head module 13, and is movably mounted and guided to translate along a first guide rail 31, which is preferably straight and preferably horizontal, thus reflecting the connecting direction X.

[0161] The first guide rail 31 preferably constitutes a fixed element of the device 1 and forms part of the frame 32. In this regard, on the one hand, the movement of the head modules 13 and 23 (FM_13, FM_23, BM_13, BM_23) is preferably horizontal, and in this case, more specifically, the movement of the first carriage 30 is carried out in the connection direction X. On the other hand, the movement of the tool module 10 (MZ+, MZ-) is preferably vertical, and more specifically, the movement of the elevator 20 is carried out in the engagement direction Z.

[0162] The frame 32, and therefore the first guide rail 31 which is rigidly fixed to the frame 32, is preferably fixed to the floor of the workshop where the equipment 1 is located.

[0163] Preferably, in order to improve stability, the first carriage 30 is guided to translate on a pair of parallel first guide rails 31.

[0164] The first carriage 30 can be driven by any suitable drive device, such as an electric motor or a first actuating cylinder 33, preferably a hydraulic cylinder, for example an annular actuating cylinder housed in the frame 32. The drive device is advantageously controlled by a control unit (preferably electronic).

[0165] Therefore, the first head module 13 can advantageously move back and forth, in which case, integrated with the first carriage 30, it moves back and forth along the first guide rail 31 in the connecting direction X, thereby:

[0166] - Sometimes, moving backward by moving BM_13 away from tool module 10, more precisely, away from a position called the "core position" 60 (which is reserved for tool module 10 and is occupied by tool module 10 when device 1 is in the engaged and closed configurations), until reaching a first position called the "fully open position" P13_1, which corresponds to the open configuration ( Figure 1 and Figures 23 to 25 It also specifically allows the operator to approach the first head module 13 (particularly its first connecting surface 13A) for cleaning.

[0167] -Sometimes by moving forward FM_13 toward core location 60 and thus toward tool module 10 ( Figure 5 , Figure 6 ,Then Figure 16 and Figure 20 ), until the second position P13_2, referred to as the "intermediate position", is reached first. Figure 6 , Figure 9 and Figure 13 The first head module 13 is closer to the tool module 10 than the fully open position P13_1, as will be described in further detail below. This position preferably allows the first head module 13 to interact with the first bearing 4, while providing a non-zero channel clearance JX, allowing the tool module 10 to move freely in the engagement direction Z. Then, by continuing to move forward FM_13, it reaches a third position referred to as the "contact position" P13_3. Figure 16 ), closer to tool module 10 and core location 60, particularly in closed configurations ( Figure 16 and Figure 21 In the case of the first extruder module 13, the end face 13A (referred to as the "first connecting face 13A") of the first extruder module 13 is in sealed contact with the corresponding face of the tool module 10 (referred to as the "first receiving face 10A") to ensure a sealed engagement, so that the flow of the first material between the first extruder 14 and the corresponding channel 17 of the tool module 10 is continuous.

[0168] For example, the effective travel of the first carriage 30, which separates the contact position P13_3 from the fully open position P13_1 in the coupling direction X, and therefore the effective travel of the first head module 13 (denoted here as DX13), will be equal to or greater than 50 cm, for example, between 1 m and 2 m, specifically to provide sufficient clearance so that the operator can easily access the first connecting surface 13A of the first head module 13, the first extruder 14, and, where appropriate, the core position 60 and the receiving surface 3A of the rollers, when the equipment is in the open position. However, it should be noted that after a production cycle, when it is only desired to replace the tool module 10 without changing one or more materials used, an open position corresponding to simply releasing the clamping force F_X can also be provided, in which the first head module 13 is slightly rearward relative to the tool module 10 in the coupling direction X, thus separating from the tool module, just enough to allow the tool module 10 to move and be removed, in this case vertically downward, and to shear any bridge of rubber compound remaining between the head module 13 and the tool module 10. In this case, the backward movement distance can be chosen as a simple non-zero value, such as equal to or greater than 0.5 mm, or even equal to or greater than 1 mm. Therefore, a backward movement distance between 0.5 mm and 5 mm, or even between 0.5 mm and 10 mm, can be specifically chosen. It should be noted that in practice, these values ​​preferably correspond to a gap JX called the "through gap," which is the gap observed when the head modules 13, 23 are in a configuration called the "pre-position," close to the core position 60, while leaving space for the tool module 10 to pass through, as will be described below. Figure 5 and Figure 6 As shown.

[0169] Similarly, the coupling device 29 preferably includes at least a second carriage 40 carrying the second head module 23, which is movably mounted and guided to translate along second guide rails 41 (preferably a pair of second guide rails 41). The second guide rails 41, or each of the second guide rails 41, are preferably straight and preferably horizontal, and like the first guide rails 31, are mounted on the frame 32, and also represent the coupling direction X.

[0170] Preferably, in Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 20 As can be seen in particular, in the extension of the first guide rail 31, the second guide rail 41 is aligned with the first guide rail 31 in the common direction corresponding to the connection direction X.

[0171] The propulsion of the second carriage 40 is preferably ensured by a second actuating cylinder 43, which is advantageously different from the first actuating cylinder 33 and can be controlled independently.

[0172] Of course, the features relating to the movement FM_23, BM_23, possible positions P23_1, P23_2, P23_3, and effective stroke length applicable to the second carriage 40 and the second head module 23 can be derived, with necessary modifications, from the features of the first carriage 30 and the first head module 13 described above, by means of symmetry about the engagement direction Z, and more particularly, by means of planar symmetry about the sagittal plane PS where appropriate.

[0173] In this regard, it should be noted that, for ease of description, the observation of the geometric arrangement of the device 1 is made here with reference to the sagittal plane PS, in which the tool module 10 is vertically positioned relative to the axis Y3 of the roller in both the engagement and closure configurations, preferably centered on the sagittal plane PS containing the central axis Y3 of the roller, such that the engagement direction Z coincides with the central axis Y3 of the roller, and such that the sagittal plane PS of the roller containing the central axis Y3 of the roller passes through a position 60 called the “core position 60”, preferably in the middle therein, which is reserved for the tool module 10 between the first and second head modules 13, 23.

[0174] Of course, in the configuration where the tool module 10, particularly the engagement direction Z, is off-center relative to the roller 3, and therefore, while the engagement direction Z remains parallel to the sagittal plane PS containing the central axis Y3 of the roller, it is offset (in the connection direction X) relative to the sagittal plane PS containing the central axis Y3 of the roller 3, such that, for example, in the closed configuration, the mold 11 is positioned almost tangentially to the roller 3, the geometric observations above regarding the layout, movement, and symmetry of the sagittal plane PS can be valid. However, the reference is not the sagittal plane PS containing the central axis Y3 of the roller, but a reference plane that is parallel to the sagittal plane of the roller 3 but correspondingly offset in the connection direction X, thereby passing through the middle of the virtual segment between the first and second connecting surfaces 13A and 23A in the closed configuration, i.e., forming a "second" sagittal plane belonging to the tool module 10 (and no longer belonging to the roller 3), which includes the engagement direction Z and divides the core position 60, and therefore the tool module 10, substantially into two equal halves.

[0175] According to a preferred possible implementation, this scheme is applicable regardless of the number of extruders 14 and 24 carried by the first die head module 13 and, where appropriate, the second die head module 23, as in Figure 26A , Figure 26B , Figure 26C and Figure 27As can be seen, the connecting device 29 includes a locking mechanism 50, which includes a first jaw 51 and a second jaw 52. The first jaw 51 and the second jaw 52 are movably mounted in a third direction Y, which is transverse to, preferably perpendicular to, the first engagement direction Z, and transverse to, preferably perpendicular to, the connection direction X.

[0176] The first jaw 51 and the second jaw 52 are arranged such that when the tool module 10 is in the engagement configuration, they can move toward each other on both sides of the tool module 10 in the third direction Y, so as to engage with the first head module 13 on the one hand and with the second head module 23 on the other hand, thereby forcing the first and second head modules 13, 23 to move toward each other and clamp the tool module 10 in the engagement direction X, thereby placing the device 1 in a closed configuration.

[0177] Each jaw 51, 52 is preferably self-propelled, on the one hand because the jaws 51, 52 carry at least one motor 53 (preferably formed by an actuating cylinder), preferably a series of motors 53 (preferably formed by multiple actuating cylinders), the motors 53 preferably distributed in two rows, one row facing their respective head modules 13, 23; on the other hand, each motor 53 acts on a pull rod 54, preferably parallel to a third direction Y-oriented, the pull rod 54 engaging in a notch-type anchor point 55 provided on the respective head module 13, 23, so as to force the jaws 51, 52 closer to the first and second head modules 13, 23 under traction forces FM_51, FM_52. The pull rod 54 can advantageously be formed by the rod of the actuating cylinder for a more compact effect.

[0178] The fact that there are multiple motors 53 advantageously makes it possible to apply high traction while keeping the motors 53 compact and relatively lightweight.

[0179] In addition, Figure 26A , Figure 26B and Figure 26C As can be seen, the motors 53 are arranged in a row, preferably aligned parallel to the engagement direction Z, so that a traction force can be applied. This traction force is distributed over the entire height of the jaws 51, 52, and preferably uniformly, thereby obtaining a clamping force F_X. This clamping force F_X is distributed over the entire height of the receiving surfaces 10A, 10B of the tool module 10, and preferably uniformly. Therefore, it is distributed substantially over the entire length of the channel 17 for conveying the extruded material, and more particularly over the entire height of the engagement surfaces between the plates constituting the tool module 10. This ensures: stable clamping, perfect sealing of the tool module 10 when it is formed from stacked plates, and perfect sealing at the engagement between the tool module 10 and each of the first and second die head modules 13, 23.

[0180] A system having a slope 56 with a non-zero tilt angle A56 relative to the third direction Y allows the traction force generated by the motors 53 of the jaws 51, 52 and carried in the third direction Y to be converted into a clamping force F_X carried in the first coupling direction X. This clamping force F_X tends to bring the first head module 13 toward the second head module 23, thereby allowing the tool module 10 to be clamped by compression between the first and second head modules 23, as in Figure 27 It can be seen in the image.

[0181] Advantageously, the inclination angle A56 of the ramp 56 allows for an amplification effect, thereby generating a clamping force F_X greater than the traction force generated by the motor 53 of the jaws 51, 52, which again contributes to the compactness of the device 1.

[0182] According to a preferred application of the invention, the clamping force F_X applied in the engagement direction X is significantly stronger than the preload force F_Z, preferably at least three times, preferably at least five times, or even at least eight times stronger than the preload force F_Z, and the preload force F_Z is applied to push the tool module 10 against the first bearing 4 in the engagement direction Z. For example, the clamping force F_X can be particularly 5 to 10 times stronger than the preload force F_Z, preferably 8 to 8.5 times stronger.

[0183] Advantageously, the strength of such clamping force F_X allows the head modules 13, 23 to clamp the tool module 10 sufficiently such that the strength of the frictional limit without slippage in the engagement direction Z (i.e., according to the vertical component in this case) is strictly greater than the foreseeable maximum strength of the vertical component (in this case, the vertically descending component) of the composite vector of the pressure of the extruded material on the tool module 10 in the same engagement direction Z. This friction without slippage characterizes the frictional resistance that the corresponding connecting surfaces 13A, 23A of the first and second head modules 13, 23 (pressed together with the receiving surfaces 10A, 10B) may exert on the receiving surfaces 10A, 10B of the tool module.

[0184] In other words, the clamping force F_X is chosen to be high enough that the lateral clamping of the first and second die head modules 13, 23 onto the tool module 10 allows the die head modules 13, 23 to apply a holding force in the engagement direction Z by friction, and thus by passively responding to the action of the operating pressure (which tends to push the mold 11 away from the roller 3) present in the gap 12 during the production of the molding element 2. This holding force is opposite in sign to the force generated by the operating pressure applied to the tool module 10, and is high enough to counteract and balance the force generated by the operating pressure at all times, and thus prevent the tool module 10 from sliding and retracting in the engagement direction Z under the action of the operating pressure.

[0185] For example, the applied clamping force F_Z is preferably between 2,400 kN and 12,000 kN, which is approximately equivalent to 240 tons to 1,200 tons.

[0186] It should be noted that, advantageously, according to the preferred features constituting the present invention, the spatial arrangement of the device 1 is ultimately optimized in terms of the accessibility of the various components of the device 1 and the overall compactness of the device, because the arrangement utilizes all six directions of the available three-dimensional space around the core location 60 of the device 1 (i.e., around the location 60 occupied by the tool module 10 in the closed configuration during the production of the molded element 2). Conventionally, the six directions X+, Y+, Z+, X-, Y-, Z- can actually be defined based on the three principal directions X, Y, Z (each having its own orientation), taking into account that each of the principal directions X, Y, Z can be traversed in a positive (+) or negative (-) direction.

[0187] In this case, if the core location 60 is considered the origin of the reference system, the orthonormal basis of the reference system is defined by three principal directions constituting the first engagement direction Z, the connection direction X, and the third locking direction Y. These principal directions X, Y, and Z intersect in pairs, more preferably perpendicular in pairs, to form a rectangular trihedron. Furthermore, for ease of description only, the core location 60 corresponds to the volume inscribed within the tool module 10 in a closed configuration. This volume is actually defined by six virtual faces of a rectangular parallelogram, each of which is perpendicular to one of the first, second, and third principal directions X, Y, and Z. Therefore, when the tool module 10 is in the core location 60 in either the engagement or closed configuration, it substantially or even completely corresponds to the six outer surfaces of the tool module 10. Preferably:

[0188] Roller 3 is arranged to face a first virtual surface of the core location 60, which is perpendicular to the first principal direction Z (i.e., the engagement direction Z). In this case, the first virtual surface corresponds to the upper surface of tool module 10, such that the roller covers the direction Z+. A lift 20, which allows tool module 10 to engage with the first bearing 4 in the core location 60 or to remove tool module 10 from the core location 60, is arranged and movably mounted in the same first principal engagement direction Z. However, a second virtual surface faces the core location 60, which is parallel to the first virtual surface and opposite to the first virtual surface in the first principal engagement direction Z. In this case, the second virtual surface corresponds to the lower surface of tool module 10; in other words, the lift 20 covers the direction Z-.

[0189] The first and second die head modules 13, 23, and therefore the extruders 14, 24 (preferably all extruders of device 1), are movably arranged and mounted relative to the core position 60 in the second principal direction X (i.e., the connection direction X). Specifically, for the first die head module 13, a third virtual surface facing the core position 60, perpendicular to the second principal connection direction X and corresponding to the first receiving surface 10A of the tool module, covers direction X-; for the second die head module 23, a fourth virtual surface facing the core position, parallel to the third virtual surface, opposite the third virtual surface in the second principal connection direction X, and corresponding to the second receiving surface 10B of the tool module, covers direction X+.

[0190] The first and second jaws 51 and 52 of the locking mechanism 50 are movably arranged and mounted relative to the core position 60 in the third principal direction Y (i.e., the locking direction Y). Specifically, for the first jaw 51, a fifth virtual surface facing the core position 60 is perpendicular to the third principal locking direction Y. In this case, the fifth virtual surface corresponds to the first side of the tool module 10 to cover the direction Y-. For the second jaw 52, ​​a sixth virtual surface facing the core position is parallel to the fifth virtual surface and opposite to the fifth virtual surface in the third principal locking direction Y. In this case, the sixth virtual surface corresponds to the second side of the tool module 10 to cover the direction Y+.

[0191] Therefore, all components of device 1 are advantageously evenly distributed around the core location 60 and, where appropriate, movably mounted in the X-, X+, Y-, Y+, Z-, Z+ directions evenly distributed around the core location 60. Each of the six virtual surfaces defining the core location 60 is actually occupied and / or arranged to interact with one of the components of the device (i.e., the first head module 13, the second head module 23, the first locking jaw 51, the second locking jaw 52, ​​the roller 3 (and one or more bearings 4, 5), and the lift 20 of the carrying tool module 10, respectively).

[0192] According to the preferred features that constitute the present invention, the engagement step (s1) includes a proximity phase (s1_1) and a subsequent pre-tightening phase (s1_2), during which the tool module 10 moves in the engagement direction Z, in this case denoted as an upward movement of MZ+, until the tool module 10 contacts the mating stop 18, which is rigidly fixed to the first bearing 4 and allows the tool module 10 to stop relative to the roller 3 at a distance suitable for the desired clearance 12, such as... Figure 9 and Figure 10As shown, during the preload phase (s1_2), the tool module 10 continues to move, in this case upwards by MZ+, to drive the first bearing 4 and the tool module 10 together in the same engagement direction Z until the first bearing 4 abuts against the first retaining member 61. Against the first retaining member 61, the first bearing 4 is blocked and pushed in the engagement direction Z by a preload force F_Z, which is applied by the tool module 10 to the first bearing 4 and the first retaining member 61. Figure 13 and Figure 14 As shown.

[0193] Preferably, the approach phase (s1_1) is performed by the elevator 20, thereby performing the first and largest part of the total stroke achieved by the tool module 10 in the entire engagement movement, which ultimately brings the tool module 10 into engagement configuration against the first bearing 4, while the preload actuators 21, 22 separate from the elevator 20 and take over to perform the preload phase (sl_2).

[0194] The preload actuators 21 and 22 perform the preload phase (s1_2), first causing the tool module 10 and the first bearing 4 to complete the second, final, and smallest part of the total engagement stroke, that is, the remaining stroke that still separates the first bearing 4 from the first retaining member 61 at the moment when the tool module 10 makes contact with the docking stop 18 of the first bearing 4. Subsequently, once the first bearing 4 stops due to contact with the first retaining member 61, the compressive strength of the tool module 10 on the docking stop 18 and thus the first bearing 4 increases rapidly.

[0195] Specifically, once the first bearing 4, and thus the tool module attached to the first bearing 4 via the docking stop 18, is blocked by the first retaining member 61, which prevents the first bearing 4 from continuing to move upward MZ+ in the engagement direction Z, and furthermore, the preload actuators 21, 22 continue to push the tool module 10 toward the first bearing 4, and thus toward the first retaining member 61 via the bearing 4, an increase in compression of the tool module 10 on the first bearing 4 is observed almost instantaneously, so that the required preload force F_Z can be quickly achieved.

[0196] Advantageously, this differentiated approach can combine the precision, repeatability, and robustness of the gap.

[0197] Specifically, the height H12 of the gap 12 is substantially determined by the position of the docking stop 18, which is fixed relative to the first bearing 4 and therefore to the central axis Y3 of the roller. Thus, it prevents the tool module 10 from moving relative to the first bearing 4 and relative to the central axis Y3 of the roller, and thus stops the end face 11A of the mold 11 carried by the tool module 10 at an ideal radial distance from the central axis Y3 of the roller, and thus at an ideal radial distance from the roller receiving surface 3A (which itself has a fixed radial distance from the central axis Y3).

[0198] In this regard, it should be noted, however, that the contact between the tool module 10 and the docking stop 18 does not initially impede the upward engagement movement MZ+ of the tool module 10 relative to the frame 32, because the first bearing 4 itself has a certain degree of freedom in the engagement direction Z relative to the frame 32. This allows the movable assembly formed by bringing together the tool module 10, the first bearing 4, and the roller 3 carried by the first bearing 4 into the same sub-assembly to continue the upward engagement movement MZ+ under the action of the preload actuators 21 and 22 until it is effectively stopped and fixed relative to the frame 32 by the subsequent first retaining member 61, which prevents the movable assembly from advancing in the engagement direction Z and the direction of upward movement MZ+.

[0199] Advantageously, through the sequential connection between the engagement device 19 (elevator 20 and preload actuators 21, 22), the tool module 10, and the first bearing 4 of the carrying roller 3, this two-stage engagement can effectively eliminate all structural gaps that are initially present or may exist in the engagement direction Z. Specifically, the device 1 thus enables a tight stacking in the engagement direction Z, which is pushed and thus locked without any gaps by applying a preload force F_Z.

[0200] It should be noted that the prestress applied by the preload force F_Z not only eliminates any initial gaps, i.e., any space initially existing between the relevant components, but also causes a certain elastic deformation in the components thus placed under stress, preventing any loosening of the components and thereby preventing any subsequent recurrence of gaps. In particular, by preloading (selected to be greater than the foreseeable stress generated by the operating pressure exerted by the material on the roller 3 from the tool module 10 during production), it is ensured that the stress generated by the pressure of the material during production will not lead to elastic deformation, and therefore will not lead to uncontrolled movement of the retaining member 61 that holds the bearing 4 carrying the roller 3.

[0201] Preferably, the docking stop 18 can be adjustable, for example by a set of interchangeable wedges (such as shims), so that the operator can select the distance between the docking stop 18 and the roller axis Y3 that the tool module 10 must intercept and stop before causing the device 1 to close. Therefore, the operator can select and adjust the height H12 of the gap 12 according to production requirements.

[0202] Preferably, the second bearing 5 also includes a mating stop 18 in a similar manner.

[0203] Preferably, the distance between the docking stop 18 associated with the second bearing and the roller center axis Y3 in the engagement direction Z is the same as that of the docking stop 18 associated with the first bearing 4, that is, in this case, more specifically at the same height.

[0204] Thus, the tool module 10 preferably abuts against each of the two mating stops 18 at the same height in the engagement direction Z. These two mating stops 18 are rigidly fixed to the first bearing 4 in the first aspect and to the second bearing 5 in the second aspect, and therefore they are axially distributed on both sides of the roller 3, more particularly on both sides of the coronal plane PF, as in... Figure 3 , Figure 7 , Figure 10 and Figure 14 This can be seen in particular.

[0205] Therefore, during the preload phase (s1_2), the first bearing 4 and the second bearing 5 move simultaneously in the engagement direction Z via the tool module 10, moving in a well-balanced manner on both sides of the coronal plane PF. This allows the direction of the roller center axis Y3 to be maintained during the preload phase (s1_2), and more particularly in this case, to be maintained in a horizontal posture.

[0206] The first retaining member 61 is preferably dual, i.e., arranged to simultaneously intercept and block the first bearing 4 on one side and the second bearing 5 on the other side on both sides of the roller 3 and the coronal surface PF.

[0207] In order to allow the generation of an effective preload force F_Z, the tool module 10, the first and second bearings 4, 5 are compressed against each other via their respective mating stops 18 and the first retaining member 61, the mating stops 18 being vertical in the engagement direction Z and located at an intermediate distance (here, an intermediate height), which is exactly between the central axis Y3 of the roller and the part of the tool module 10 furthest from the central axis Y3.

[0208] To provide the first bearing 4 and the second bearing 5 with the mobility required to perform the preload stage (s1_2), the first and second bearings 4 and 5 are preferably provided with a first slider 62 and a second slider 63, respectively. Each slider is guided to translate along the engagement direction Z on a first support 64 and a second support 65, both of which are rigidly fixed to the frame 32, as shown in... Figure 1 , Figure 3 , Figure 10 , Figure 12 and Figure 14 This can be seen in particular.

[0209] Furthermore, it should be noted that, preferably, unlike the elevator 20 which is mounted on and guided by the frame 32 (preferably via supports 64, 65), the preload actuators 21, 22 are carried by the first and second head modules 13, 23, respectively, so as to generate a preload force F_Z. Therefore, by being firmly supported in the region of the head modules 13, 23 in the engagement direction Z, and thus by the carriages 30 and 40 and the corresponding guide rails 31, 41, in the engagement direction Z, a particularly high preload force F_Z can be generated without the elevator 20 itself bearing all the preload force F_Z.

[0210] According to one possible arrangement, the first and second preload actuators 21, 22 can be formed by sliders, which are movably mounted in the first head module 13 and the second head module 23 respectively and guide translation in the coupling direction X.

[0211] The preload actuators 21 and 22 may each be provided with inclined surfaces 21A and 22A.

[0212] The inclined surfaces 21A and 22A are preferably inclined at an angle between 10 and 30 degrees relative to the joining direction X, and more generally relative to a plane perpendicular to the joining direction Z (and thus relative to a horizontal plane in this case), and / or in the same manner at an angle between 60 degrees (=90-30) and 80 degrees (=90-10) relative to the joining direction Z.

[0213] In this manner, the preloaded actuators 21, 22 will form wedges that can alternately retract into a stationary position within their respective head modules 13, 23. Figure 2 , Figure 6 , Figure 9Relative to the core position 60, relative to the tool module 10, and relative to the sagittal plane PS, these wedges can be pushed out from the corresponding connecting surfaces 13A, 23A, either backward or, conversely, by differentiated forward movement FM_21, FM_22 relative to the carriages 30, 40 carrying the head modules 13, 23, extending from their connecting surfaces 13A, 23A. Figure 13 This engages their inclined surfaces 21A and 22A with the tool module 10, thereby tending to force the tool module 10 toward the first bearing 4 and the first retaining member 61, and then compresses it under the preload force F_Z.

[0214] The preload actuators 21 and 22 can be driven by any suitable drive device (such as a motor or actuating cylinder, electric or hydraulic), which is preferably carried on the relevant head module 13 and 23.

[0215] Preferably, the first and second preload actuators 21 and 22 will act in opposition to each other, appearing from the first head module 13 and the second head module 23 respectively, mirroring the tool module 10 and the sagittal plane PS containing the engagement direction Z, thereby applying a balancing effect to the tool module 10 and maintaining the orientation of the tool module 10 relative to the engagement direction Z.

[0216] Furthermore, the differentiated translational movement of each preload actuator 21, 22 in the coupling direction X, generated by the means for driving the relevant preload actuators, is a movement relative to its head module 13, 23, which is held in position in the coupling direction X by a powerful actuating cylinder. Therefore, the preload actuators 21, 22 can apply high penetrating force to the tool module 10 in the coupling direction X without causing the head modules 13, 23 to move backward, thus enabling the generation of a very high preload force F_Z via the transition via ramps 21A, 22A.

[0217] Preferably, the distance referred to as the "preload clearance" JZ is between 0.1 mm and 1 mm, which initially separates the first bearing 4 from the first retaining member 61 in the engagement direction Z before the preload stage (s1_2) is performed (e.g., in...). Figure 5 , Figure 6 , Figure 8 and Figure 11 As can be seen in the diagram, this forms the distance that the first bearing 4 travels in the engagement direction Z during the preload phase (s1_2).

[0218] Advantageously, this small preload clearance JZ provides travel for the movable assembly formed by the tool module 10 and the first and second bearings 4, 5, which is long enough to allow the preload actuators 21, 22 to properly perform their forward movement FM_21, FM_22 in the coupling direction X and produce an overall upward movement MZ+, thereby eliminating any clearance within the movable assembly, but short enough to be quickly compensated by the tool module 10 sliding on the gently inclined ramps 21A, 22A.

[0219] like Figures 12 to 15 As shown, when the first and second bearings 4 and 5 move upward MZ+ under the drive and accompaniment of the tool module 10 and meet the first retaining member 61, the preload clearance JZ advantageously becomes zero (JZ = 0), and the required preload force F_Z truly begins to be generated. That is, under the thrust applied by the preload actuators 21 and 22 in the engagement direction Z, the stack formed by the tool module 10, bearings 4 and 5 and retaining member 61 undergoes preload and elastic deformation, as long as the preload actuators 21 and 22 act to press the tool module 10 and bearings 4 and 5 against the first retaining member 61, that is, as long as the required preload force F_Z is maintained, especially during the extrusion operation. Figure 21 The pre-tightening gap JZ remains zero.

[0220] Preferably, the first retaining member 61 is rigidly fixed to the first head module 13.

[0221] Therefore, the head module 13 can act as an anchor for the first retaining member 61 and hold the first retaining member 61 (at least) in the engagement direction Z to prevent the retaining member 61 from moving in the engagement direction Z under the thrust of the preloaded actuators 21, 22.

[0222] Furthermore, the first retaining member 61 is therefore preferably mounted on the first carriage 30 for moving the first head module 13 in the coupling direction X, such that the first carriage 30 drives the first retaining member 61 and the first head module 13 together in the forward FM_13 and backward BM_13 movement of the first head module 13 in the coupling direction X.

[0223] More preferably, the first retaining member 61 occupies a position on the first head module 13, which is fixed at least in the engagement direction Z, more preferably in both the engagement direction Z and the connection direction X, or even more preferably in all three main directions X, Y, Z in space relative to the first connecting surface 13A of the first head module 13.

[0224] Therefore, in the sequence of closing device 1, the operation of the first retaining member 61 will be particularly predictable, precise and repeatable.

[0225] Optionally, the first retaining member 61 may be integrally formed with the portion of the first head module 13 that forms the first connecting surface 13A, in order to ensure the rigidity and robustness of the retaining member 61.

[0226] Alternatively, the retaining member 61 may be formed by an attachment that is connected (e.g., secured with screws) to the first head module 13 to be fixed relative to the first connecting surface 13A.

[0227] Advantageously, since the first retaining member 61 is itself held by the first head module 13, preventing any movement in the engagement direction Z, and its position in the engagement direction Z relative to the first carriage 30, and more particularly relative to the position occupied by the preload actuators 21, 22 in the engagement direction Z, the action of generating a preload force F_Z by the preload actuators 21, 22 on the engagement of the tool module 10 is equivalent to clamping the tool module 10 and the first and second bearings 4, 5 in the engagement direction Z between two jaws supported by the same head module 13, and more particularly by the same carriage 30, namely the first jaw and the second jaw. The first jaw in this case constitutes a fixed jaw in the engagement direction Z, formed by the first retaining member 61, and the second jaw in this case constitutes a movable jaw, formed by the ramps 21A, 22A of the preload actuators 21, 22, which are substantially flush with the retaining member 61.

[0228] Therefore, during the time required for closing and extrusion operations, the tool module 10 can be temporarily rigidly fixed to the bearings 4 and 5, at least in the engagement direction Z, by the first die head module 13 (more preferably by the first and second die head modules 13, 23).

[0229] The first retaining member 61 may take any suitable form (e.g., a shoulder) to allow it to be positioned on the path taken by the first bearing 4 in the engagement direction Z during the engagement step (s1).

[0230] Preferably, the first retaining member 61 is formed as a hook, preferably C-shaped.

[0231] Preferably, the concave opening of the hook faces the sagittal plane PS so as to face the bearings 4 and 5 in the connection direction X.

[0232] Particularly preferably, the first retaining member 61 is arranged such that when the first head module 13 is in its fully open position P13_1 in the coupling direction X... Figure 1 and 2 ) to its middle position P13_2( Figure 5 , Figure 6 and Figure 9When the first head module 13 moves from its intermediate position P13_2 to its contact position P13_3, it is placed on the path of the first bearing 4 (i.e., on the path when the bearing moves upward MZ+). Figure 16 () remains in the path of the first bearing 4, as long as the first die head module 13 remains in the contact position P13_3, especially during extrusion operation ( Figure 21 ).

[0233] Conversely, when the first head module 13 moves away from the sagittal plane PS to retract from its intermediate position P13_2, especially when the first head module 13 is in or returns to the fully open position P13_1 ( Figure 1 , Figure 2 , Figure 23 The first retaining member 61 is preferably arranged to be disengaged from the path of the first bearing 4.

[0234] Therefore, advantageously, the fact that the first retaining member 61 is carried by the first head module 13, and more particularly by the first carriage 30, makes it possible to control the position of the retaining member 61 and the position of the first head module 13 simultaneously according to the movement of the first head module 13 in the coupling direction X.

[0235] In this way, the retaining member 61 can be placed in the path of the first bearing 4, and similarly, the retaining member 61 can be placed in the path of the second bearing 5, blocking the bearings 4 and 5 only when useful, and conversely, when the equipment is in an open configuration, it can provide a completely unobstructed passage for the bearings 4 and 5 and the roller 3.

[0236] Of course, in an absolute sense, the first retaining member 61 can be carried by the second head module 23 instead of the first head module 13.

[0237] However, preferably, the first retaining member 61 will be rigidly fixed to the first head module 13, while the second head module 23 itself will have a second retaining member 66, which will be rigidly fixed to the second head module 23.

[0238] In a manner similar to that described for the first retaining member 61, the second retaining member 66 is fixed to the second carriage 40, and more particularly, at least in the engagement direction Z, preferably simultaneously in the engagement direction Z and the connection direction X, or even in all three main directions X, Y, Z, the second retaining member 66 is in a fixed position relative to the second connecting surface 23A of the second head module 23.

[0239] Similarly, the second retaining member 66 preferably takes the form of a C-hook, engaging with the first bearing 4, and more particularly, a double hook capable of engaging with the first bearing 4 and the second bearing 5 on both sides of the coronal plane PF. As with the first retaining member 61, a preload clearance JZ will be provided and used between the second retaining member 66 and the corresponding one or more bearings 4, 5, in a manner similar to that described above.

[0240] Therefore, advantageously, the first retaining member 61 and the second retaining member 66 interact to hold the first bearing 4 on one side of the sagittal plane PS containing the engagement direction Z, and the same applies to the second bearing 5. This symmetrical retention of bearings 4 and 5, distributed and substantially balanced on both sides of the sagittal plane PS, is particularly robust and stable.

[0241] More specifically, therefore, in each of the four quadrants defined by the coronal plane PF and the sagittal plane PS, there are retaining members 61, 66 and corresponding bearing portions 4, 5, projected onto the datum plane (which is horizontal in this case and perpendicular to the engagement direction Z). This provides good positioning of the bearings 4, 5 and the roller 3 against the tool module 10 (and vice versa).

[0242] Of course, retaining components 61, 66 and head modules 13, 23 will be made of materials with sufficient rigidity, such as metal alloys, preferably steel.

[0243] Preferably, the first bearing 4 includes a base 67.

[0244] The base 67 preferably forms two branches that extend substantially perpendicular to the engagement direction Z, with each branch on a different side relative to the sagittal plane PS.

[0245] When the first bearing 4 includes a base 67, and the first head module 13 includes a first retaining member 61 (preferably in the form of a hook), and the second head module 23 includes a second retaining member 66 (preferably in the form of a hook), then the first and second retaining members 61 and 66 are preferably arranged opposite to the base 67 of the first bearing 4 to retain and block the first bearing in the engagement direction Z, resisting the preload force F_Z applied to the first bearing 4 by the tool module 10. Figure 6 and Figure 8 This can be seen in particular.

[0246] Similarly, the second bearing 5 will preferably include a base 68.

[0247] Therefore, preferably, when the first and second head modules 13, 23 move away from the core position 60 and enter the fully open position P13_1, the hooks forming the retaining members 61, 66 disengage from each of the relevant bearings 4, 5, and more particularly from the bases 67, 68 of the bearings 4, 5. When the head modules 13, 23 move toward the core position 60 in the coupling direction X and reach their intermediate position P13_2, the hooks cover the bases 67, 68 to trap them.

[0248] Therefore, the preload gap JZ corresponds to the distance in the engagement direction Z, and before the preload actuators 21, 22 take effect, that separates the branch (in this case, the upper branch) of each hook forming the retaining member 61, 66 from the corresponding surface (in this case, the upper surface) of the base 67, 68 trapped by the hooks.

[0249] Preferably, especially when the engagement direction Z is vertical or substantially vertical, the preload stage (s1_2) is performed by lifting the first bearing 4 with the aid of the tool module 10 and holding the first bearing against the first retaining member 61 against gravity.

[0250] Therefore, during the preload phase (s1_2), the first bearing 4 is lifted by a preload actuator that lifts the first bearing 4, and more particularly its base 67, from the support on which it rests in the open configuration, until the upper surface of the bearing 4, and more particularly the base 67, abuts against the first retaining member 61 and the second retaining member 66, in this case against the respective lower surfaces of the upper branches of the hooks forming the first and second retaining members 61, 66.

[0251] Advantageously, this vertical operation can utilize the inherent weight of rollers 3 and bearings 4, 5 to ensure stable positioning of the movable components during upward movement MZ+, in particular preventing any tilting or blockage or bumping of rollers 3, so as to eliminate the gap between tool module 10 and bearings 4, 5, since the weight of rollers 3 and bearings 4, 5 is distributed on bases 67, 68, resisting the thrust applied by preload actuators 21, 22 and transmitted through tool module 10.

[0252] Of course, the vertical thrust generated by the preload actuators 21 and 22 must not only be sufficient to offset the total weight of the rollers 3, bearings 4 and 5, and tool module 10, but also additionally achieve the preload force F_Z. In practice, the preload force will be much greater than the weight exerted on the tool module 10 by the rollers 3 and bearings 4 and 5 alone. For example, the weight of the assembly consisting of rollers 3 and bearings 4 and 5 can be about 5 tons, while the envisioned preload force F_Z is preferably about 60 tons.

[0253] Furthermore, when device 1 returns to the open configuration, this vertical operation simplifies the automatic return of rollers 3 and bearings 4 and 5 under simple gravity, which in turn lowers them again. This passive return method particularly saves energy.

[0254] In this case, the same applies to the second bearing 5, which is preferably lifted and pressed against the retaining members 61, 66 against gravity.

[0255] In the engagement step (s1), the preload force F_Z that pushes the tool module 10 toward the first bearing 4 in the engagement direction Z is preferably generated by at least one preload actuator 21, 22, which, as described above, engages with the tool module 10 in at least one area called a “clamping area” 70 provided on the tool module 10.

[0256] Preferably, particularly in order to make the device 1 more compact and robust, the clamping area 70 is formed by the tail end of the tool module 10, that is, the face (in this case the lower surface) of the tool module 10 located in the engagement direction Z opposite to the end face 11A of the roller 3 and the mold 11. More particularly, the inclined portion of the tail end has a shape that matches the inclined surfaces 21A, 22A of the preload actuators 21, 22.

[0257] In the clamping step (S2), the first and second head modules 13, 23 abut against the tool module 10 to apply a clamping force F_X to the portions of the tool module 10 referred to as the “receiving surfaces” 10A, 10B, as described above.

[0258] Based on the preferred features of the present invention, which themselves constitute an invention, in Figure 16 As can be seen, portions of the tool module 10 referred to as “receiving surfaces” 10A and 10B (which abut against the first and second head modules 13 and 23) are located in the intermediate region 71, which is situated between the at least one clamping region 70 and the roller 3, and is therefore closer to the gap 12 than the at least one clamping region 70, which is pushed by the at least one preload actuator 21 and 22.

[0259] Therefore, the first and second die head modules 13, 23 apply their clamping forces F_X as close as possible to the gap 12, which optimizes the stability and rigidity of the tool module 10 in its engaged configuration (more typically in its closed configuration) throughout the extrusion operation.

[0260] Specifically, this arrangement shortens as much as possible the force transmission chain against backward movement of the tool module or any other unwanted movement of the tool module 10 under the pressure of the extruded material present in the gap 12.

[0261] Preferably, when the tool module 10 is in the core position 60 and in contact with the mating stop 18 of the first and second bearings 5, more than 50% of the area of ​​each receiving surface 10A, 10B of the tool module 10, more preferably the entire area of ​​each receiving surface 10A, 10B, is located in the intermediate region 71, that is, in the engagement direction Z, closer to the gap 12 and the roller 3 than the clamping region 70 furthest from the roller 3 (or even, where appropriate, the clamping region 70 closest to the roller outside of one or more clamping regions 70 that interact with the preload actuators 21, 22).

[0262] Therefore, in the engagement direction X, the head modules 13, 23 transmit the clamping force F_X to most or even all of the mating surfaces of the tool module, which is closer to the roller 3 and the gap 12 in the engagement direction Z. Thus, in this case, the clamping area 70 is at a height higher than (but still lower than) the height of the central axis Y3. Therefore, the clamping area 70 is further away from the roller and the gap than the mating surfaces, and thus, in this case, the height is lower than the height of the receiving surfaces 10A, 10B and the corresponding connecting surfaces 13A, 23A.

[0263] It should also be noted that the respective connecting surfaces 13A and 23A of the first and second head modules 13 and 23, and the corresponding receiving surfaces 10A and 10B of the preferred tool module, preferably occupy substantially or even identical areas (in this case, height range) in the engagement direction Z, such that during clamping, the first and second connecting surfaces 13A and 23A overlap in the engagement direction Z, and thus apply stress to the tool module 10 with a clamping force F_X, which constitutes compressive stress primarily and preferably solely.

[0264] When a clamping force F_X is applied, this advantageously avoids the generation of shearing forces on the tool module 10, which would produce harmful shear stress.

[0265] Similarly, the first and second head modules 13, 23 are preferably arranged to overlap in the third principal direction Y, and more generally to be fully superimposed in a projection on a plane perpendicular to their common connection direction X (so in this case, for example, an orthogonal projection on the sagittal plane PS), such that the first and second head modules 13, 23 apply compressive stress rather than shear stress to the tool module 10 when a clamping force F_X is applied.

[0266] A preferred embodiment of the closing sequence according to the present invention will now be described with reference to device 1 shown in the figure.

[0267] Initially, device 1 is in an open configuration, with the first and second head modules 13 and 23 located away from the core position 60 in the connection direction X, and in their fully open positions P13_1 and P23_1 on either side of the sagittal plane PS. Tool module 10 is in a disengaged configuration, outside the core position 60, at a certain distance from the roller 3 and the docking stop 18. Figure 1 and Figure 2 As shown.

[0268] First, preferably via a first carriage 30 guided by a first guide rail 31 in the coupling direction X and carrying the first head module 13, and a second carriage 40 guided by a second guide rail 41 in the coupling direction X and carrying the second head module 23, the coupling device 29 allows the first head module 13 (carrying its first holding member 61) and the second head module 23 (carrying its second holding member 66) to move toward each other into a configuration called a "pre-positioning configuration," such as... Figure 5 and Figure 6 As shown.

[0269] For this purpose, the carriages 30, 40, and consequently the first and second head modules 13, 23, move substantially mirror-image toward the sagittal plane PS by advancing towards the core position 60 via forward movements FM_13, FM_23, until they reach intermediate positions P13_2, P23_2 corresponding to the predetermined positioning configuration, as shown. Figure 5 and Figure 6 As shown.

[0270] In this pre-positioning configuration, the first and second head modules 13, 23 define a channel between them for the tool module 10.

[0271] The channel is designed to allow tool module 10 to reach core position 60 and to contact bearings 4 and 5 by passing between the first and second head modules 13, 23, and more particularly by passing between their connecting surfaces 13A, 23A. In this respect, Figure 6 and Figure 13 As can be seen, when they are in their middle positions P13_2 and P23_2, the first and second head modules 13 and 23 provide a minimum distance called "channel gap" JX in the connection direction X between their connection surfaces 13A and 23A and the paths provided for the corresponding receiving surfaces 10A and 10B of the tool module (in the engagement direction Z).

[0272] Geometrically, the channel gap JX preferably corresponds to the distance measured in the connection direction X, thereby separating the connection surfaces 13A, 23A belonging to the head modules 13, 23 from the corresponding imaginary surface of the core position 60, which is parallel to and closest to the connection surfaces 13A, 23A.

[0273] Preferably, the channel gap JX is between 0.5 mm and 50 mm.

[0274] Furthermore, in this pre-positioning configuration, the first and second retaining members 61 and 66 occupy positions opposite to the base 67 of the first bearing 4 in the engagement direction Z, and the distance between them and the base 67 in the engagement direction Z is not zero, referred to as the "preload clearance" JZ. This preload clearance is preferably between 0.1 mm and 1 mm, as described above. Therefore, the first and second retaining members 61 and 66 form an obstacle on the path of the first bearing 4 in the engagement direction Z (in this case, an upward path).

[0275] Similarly, the first and second retaining members 61 and 66 occupy positions on the path intended to be taken in the engagement direction Z of the base 68 of the second bearing 5.

[0276] In this case, more specifically, the upper branches of the hooks forming the retaining members 61 and 66 are brought toward the sagittal plane PS in the same forward movement FM_13 and FM_23 as the head modules 13 and 23, respectively. The retaining members 61 and 66 are rigidly fixed to the head modules 13 and 23 so as to be positioned above the branches of each base 67 and 68, i.e. vertically flush with them, thereby at least partially covering the bases 67 and 68.

[0277] The engagement device 19 itself is designed to move the tool module 10 preferably via the elevator 20 in the engagement direction Z, in which case, by moving MZ+ vertically upward through the channel defined by the first and second head modules 13, 23 until the tool module 10 contacts the docking stop 18 rigidly fixed to the first bearing 4 (and, respectively, until the tool module simultaneously contacts the docking stop 18 rigidly fixed to the second bearing 5).

[0278] This approach phase (s1_1) is particularly important in Figure 9 and Figure 10 As shown in the image.

[0279] The engagement device 19 is also designed to preferably continue moving the tool module 10 via at least one preload actuator 21, 22A having inclined surfaces 21A, 22A that abut against the tool module 10 transversely to the engagement direction Z. This is achieved by driving the first bearing 4 and the tool module 10 together in the same engagement direction Z until the base 67 of the first bearing 4 abuts against the first and second retaining members 61, 66, thereby eliminating the preload clearance (JZ = 0) and placing the tool module 10 in the engagement configuration, subjected to a preload force F_Z, such as... Figure 13 As shown.

[0280] It should be noted that, in the engagement direction, the distance separating the preload actuators 21, 22 from the retaining members 61, 66 is advantageously short, particularly strictly less than the height of the supports 64, 65. Thus, the generation of the preload force F_Z will cause elastic deformation of the relevant components (especially the movement of the roller 3 under preload), which is far less than the deformation (and therefore the movement of the roller 3) that could have been caused if the preload ring had passed through the supports 64, 65 over the entire height of the supports. Therefore, without affecting the layout and function of the device 1, a very high preload force F_Z can be applied, the absolute value of which is greater than the strength of the force generated by the pressure exerted by the extruded material in the void 12.

[0281] During this pre-tightening phase (s1_2), the guide clearance JX, i.e., the lateral clearance between the tool module 10 and the head modules 13, 23, remains unchanged, and the first and second connecting surfaces 13A, 23A of the first and second head modules 13, 23 advantageously help guide the tool module 10 to translate in the engagement direction Z, between the head modules 13, 23, parallel to the connecting surfaces 13A, 23A.

[0282] The connecting device 29 is also designed to bring the first and second head modules 13, 23 closer together to the tool module 10 in the connecting direction X, so as to place the first and second head modules 13, 23 in a closed configuration, such as... Figure 16 As shown.

[0283] In this clamping step (s2), the forward movement FM_13, FM_23 of the head modules 13, 23 is resumed and thus completed in the coupling direction X toward the sagittal plane PS, so as to first eliminate the channel gap (JX=0), thereby bringing the connecting surfaces 13A, 23A of the head modules 13, 23 into contact with the receiving surfaces 10A, 10B of the tool module, that is, placing the head modules 13, 23 at their respective contact positions P13_3, P23_3, and then generating the required clamping force F_X by compressing the tool module 10 by the head modules 13, 23.

[0284] Therefore, the tool module 10 is firmly locked in the core position 60, compressed against the bearings 4 and 5 by a preload force F_Z, which is carried in the engagement direction Z, pointing towards the central axis Y3 of the roller and toward the gap 12. Advantageously, the application of the clamping force F_X, carried in the transverse engagement direction X, prevents the tool module from spontaneously returning to its original position in the engagement direction Z, thus preventing the preload force F_Z from being released.

[0285] Advantageously, the locking of the head modules 13, 23 onto the tool module 10 begins as close as possible to the gap 12, almost at the height of the gap, and is distributed at most along the height of the tool module 10, thus at a relatively short height. Therefore, the force ring connecting the tool module 10 to the roller receiving surface 3A, passing through the head modules 13, 23, retaining members 61, 66, then the bearings 4, 5 and the roller 3, and closing through the gap 8 separating the roller receiving surface 3A from the tool module 10, is particularly short. Therefore, the gap 12 is particularly stable, has low sensitivity, and especially low deformability relative to the stress generated by the pressure of one or more extruded materials.

[0286] Preferably, the head modules 13 and 23 move and clamp each other via first and second self-propelled jaws 51 and 52. The pull rods 54 of the jaws hook onto anchor points 55 on the head modules 13 and 23, so that each jaw 51 and 52 simultaneously applies a traction force carried in the locking direction Y to the side wings of the first head module 13 and the second head module 23. This forces the jaws 51 and 52 to move toward each other in the locking direction Y, which is transverse to the connection direction X. Therefore, through the inclined plane 56, a compressive force carried in the connection direction X is generated on the head modules 13 and 23, such as... Figure 26A , Figure 26B and Figure 26C As shown.

[0287] More preferably, the carriages 30 and 40 first bring the head modules 13 and 23 into contact with the tool module 10, so that there are no more channel gaps JX. Thus, the jaws 51 and 52 only need to act on the head modules 13 and 23 that are already in contact with the tool module 10, so as to generate clamping stress F_X through the elastic compression of the tool module 10 by the head modules 13 and 23.

[0288] It should be noted that when the first and second head modules 13 and 23 move from their intermediate positions P13_2 and P23_2 to their contact positions P13_3 and P23_3, the retaining members 61 and 66 belonging to the first head module 13 and the second head module 23 respectively move advantageously with the head modules 13 and 23 in the connection direction X, while maintaining contact with the first bearing 4 and the second bearing 5 respectively. In this case, by sliding on the upper surface of the base 67, no relaxation of the preload F_Z is caused.

[0289] For this purpose, the lower surface of the upper branch of each hook of the retaining members 61, 66, and the upper surface of the base 67 to which the hooks engage are formed, preferably parallel to the connection direction X, and preferably flat, in this case horizontal.

[0290] Preferably, the steps in the closing sequence, particularly the sequential steps of pre-positioning (s1), engagement (including the approach phase (s1_1) followed by the pre-tightening phase (s1_2)), and then clamping (s2), will be automatically executed and sequenced by a suitable control unit, preferably an electronic control unit.

[0291] Furthermore, the device 1 preferably includes at least one lateral stabilizing member (different from the first and second head modules 13, 23), for example, a wedge movably mounted in a third direction, which is transverse to the first engagement direction Z and the connection direction X, and here preferably corresponds to the third main direction Y, parallel to the central axis Y3 of the roller.

[0292] like Figure 17 , Figure 18 and Figure 19 As shown, the lateral stabilizing member is arranged in a closed configuration to engage between the base 67 of the first bearing 4 and at least one of the first and second head modules 13, 23 by force, preferably in the cavity of at least one of the first and second retaining members 61, 66, in such a way as to block and push the first bearing 4 against and also clamp the first and second head modules 13, 23 of the tool module 10 in the engagement direction X (transverse to the engagement direction Z).

[0293] Advantageously, such a lateral stabilizing member can strengthen the first bearing 4 to keep it in place, and thus also strengthen the fixed position of the central axis Y3 of the roller relative to the frame 32. This holding position is, in most cases, and even in practice, entirely guaranteed by the friction between the bearing 4 and the holding member 61 under the preload F_Z.

[0294] Specifically, the lateral stabilizing member allows for a temporary, fixed connection to be established between the first bearing 4 and the frame 32 during closing and extrusion operations, without the risk of slippage in the connection direction X. This connection passes through the lateral stabilizing member, then through the relevant die head module 13 and the corresponding carriage 30, and then, on one hand, via the guide rail 31, and on the other hand, via the first actuating cylinder 33 that fixes the position of the carriage 30 on the guide rail 31, to the frame 32. Thus, the first bearing 4 is firmly fixed in the connection direction X, and even prestressed.

[0295] Advantageously, the connection formed by the lateral stabilizing member differs from the connection formed by the first strut 64 and the first slider 62, such that the lateral stabilizing member provides a support offset relative to the first strut 64 and the first slider 62. This offset support thus enhances the integrity of the assembly, and in particular prevents any bending of the first strut 64, as well as any tilting in the coronal plane PF, which tends to deviate the strut 64 from the engagement direction Z by bending or tilting the strut 64 toward the engagement direction X.

[0296] Preferably, the device 1 will include at least one first lateral stabilizing member 72 and a second lateral stabilizing member 73, the first lateral stabilizing member 72 being intended to be inserted between the base of the first retaining member 61 and the first bearing 4 on the same side of the sagittal plane PS as the first head module 13, and the second lateral stabilizing member 73 being intended to be inserted between the base of the second retaining member 66 and the first bearing 4 on the other side of the sagittal plane PS (i.e., on the same side as the second head module).

[0297] Of course, a third lateral stabilizing member 74 and a fourth lateral stabilizing member 75 can also be provided to act on the second bearing 5 and stabilize the second bearing 5 relative to the first retaining member 61 and the second retaining member 66, respectively. Figure 18 , Figure 19 and Figure 20 It can be seen in the image.

[0298] The implementation of one or more lateral stabilizing members 72, 73, 74, 75 preferably constitutes the final step in the closed sequence.

[0299] Once the closing sequence is completed, the tool module 10 is locked and stressed relative to the roller 3 to form a sealed extrusion circuit through the channel 17 from the extruders 14, 24 to the gap 12 with perfectly controlled fixed dimensions.

[0300] Then the extrusion operation can be performed, such as Figure 21 and Figure 22 As shown.

[0301] One or more constituent materials of the molding element, preferably rubber-based compounds, are thereby kneaded and heated by extruders 14 and 24 and forced under pressure through channels 17 to the mold 11 and the cavity 12. These materials are arranged and shaped into the molding element 2, which is conveyed by the rotation of rollers 3 as the molding element 2 is produced and exits from the cavity 12.

[0302] Once the extrusion operation is complete, especially if you wish to replace the original tool module 10 with another tool module, open the device 1 in the following opening sequence.

[0303] First, the carriages 30 and 40 are brought back in the connection direction X by retracting BM_13 and BM_23, so that the first and second head modules 13 and 23 are moved away from each other, preferably from their contact positions P13_3 and P23_3 to their fully open positions P13_1 and P13_3, thereby disconnecting their connecting surfaces 13A and 23A from the receiving surfaces 10A and 10B of the tool module 10. Figure 23In this way, the bases 67 and 68 of bearings 4 and 5 are also released from the clamping of retaining members 61 and 66. Preferably, this retracting movement of carriages 30 and 40 is also used to disengage preload actuators 21 and 22 from tool module 10, thereby clearing a path for elevator 20.

[0304] Then, by causing the elevator 20 to perform a movement away from the roller 3 in the engagement direction Z (in this case, a downward vertical movement MZ), the tool module 10 is removed from the roller 3. Figure 24 ).

[0305] Finally, the preloaded actuators 21 and 22 are retracted into their respective head modules 13 and 23. Figure 25 In this case, the differentiated backward movement BM_21, BM_22 is carried by the connection direction X.

[0306] It should be noted in this regard that, alternatively, the preload actuators 21 and 22 can be retracted into the head modules 13 and 23 before the clamping of the head module on the tool module 10 is released, thereby performing the preloading and clamping operations in the exact reverse order of the closing sequence.

[0307] Therefore, since the operation for disengaging the preload actuators 21, 22 provides very little resistance, unlike the engagement operation which requires a large force to make the preload actuators 21, 22 penetrate below the tool module 10 in order to lift and push the tool module 10 in the engagement direction Z, in this case, they can be disengaged together by the same backward movement BM_13, BM_23, thus disengaging the head module 13, 23 and the preload actuators 21, 22 simultaneously, so that they can move away from the tool module 10.

[0308] Of course, the present invention is by no means limited to the alternatives described above, and those skilled in the art can separate or freely combine the features described above, or replace them with equivalents.

Claims

1. Method of implementing an extrusion device (1) for producing a shaped element (2), said extrusion device comprising a roller (3) rotatably supported by at least a first bearing (4), a tool module (10) comprising a die (11) intended to interact with the roller (3) to form a void (12) that shapes the shaped element (2), and at least a first head module (13) having a first extruder (14) intended to supply the tool module (10) with a first constituent material of the shaped element, said method being characterized in that it comprises: - a joining step (SI) during which the tool module (10) is moved in a first direction called "joining direction" (Z) relative to the first head module (13) and the first bearing (4) so as to bring said tool module (10) into abutment with the first bearing (4) and to subject said tool module (10) to a pre-tightening force (F_Z) oriented in the joining direction (Z) relative to the first bearing (4) so as to bring said tool module (10) into a configuration called "joined configuration" relative to the roller (3) that defines the desired void (12) for producing the shaped element (2), - then a clamping step (s2) during which, when said tool module (10) is in its joined configuration and pre-stressed by the pre-tightening force (F_Z) to the first bearing (4), said tool module (10) is clamped between the first head module (13) having the first extruder (14) and a second head module (23) different from the first head module (13) by moving said first and second head modules (13, 23) towards each other on both sides of the tool module (10) in a second direction called "coupling direction" (X) that is transverse to the joining direction (Z), in such a way as to put the first extruder (14) in communication with the tool module (10) and to subject said first and second head modules (13, 23) to a clamping force (F_X) oriented in said coupling direction (X) so as to retain the tool module (10) by compression between the first and second head modules (13, 23).

2. The method of claim 1, wherein, The engagement step (S1) comprises a phase of approach (S1_1) during which the tool module (10) is moved in the engagement direction (Z) until it comes into contact with a docking stop (18) rigidly fixed to the first bearing (4) and enabling the tool module (10) to be stopped at a distance relative to the roller (3) suitable for the required gap (12), and then a phase of pre-tightening (S1_2) during which the movement (MZ+) of the tool module (10) is continued to drive the first bearing (4) and the tool module (10) together in the same engagement direction (Z) until the first bearing (4) comes into abutment against the first retaining member (61), the first bearing (4) being blocked and pushed in the engagement direction Z by a pre-tightening force (F_Z) exerted by the tool module (10) on the first bearing (4) and the first retaining member (61).

3. The method of claim 2, wherein, A distance called "pre-tightening gap" (JZ) separating initially the first bearing (4) and the first retaining member (61) in the engagement direction (Z) before the pre-tightening phase (S1_2) is performed.

4. The method according to claim 2 or 3, characterized in that, The first retaining member (61) is rigidly fixed to the first head module (13).

5. The method of claim 2, wherein, The pre-tightening phase (S1_2) is performed by lifting the first bearing (4) by means of the tool module (10) and keeping the first bearing (4) pressed against the first retaining member (61) against the force of gravity.

6. The method of claim 1, wherein, The pre-tightening force (F_Z) pushing the tool module (10) towards the first bearing (4) in the engagement direction (Z) during the engagement step (S1) is generated by at least one pre-loading actuator (21, 22) which for this purpose engages the tool module (10) in at least one clamping zone (70) provided on the tool module (10) and in the clamping step (S2) the first and second head modules (13, 23) come into abutment against the tool module (10) so as to exert a clamping force (F_X) on a portion of the tool module called "receiving face" (10A, 10B) which is located in an intermediate zone (71) between the at least one clamping zone (70) and the roller (3) and is thus closer to the gap (12) than the at least one clamping zone (70) pushed by the at least one pre-loading actuator (21, 22).

7. The method of claim 1, wherein, The pre-tightening force (F_Z) is between 300 kN and 1,500 kN.

8. The method of claim 1, wherein, The intensity of the clamping force (F_X) implemented in the coupling direction (X) is strictly greater than the intensity of the pre-tightening force (F_Z) implemented to push the tool module (10) against the first bearing (4) in the engagement direction (Z).

9. Extrusion device (1) for producing a shaped element (2), the device comprising: - a roller (3) rotatably supported by at least a first bearing (4), - a tool module (10) comprising a die (11) intended to interact with the roller (3) to form a void (12) that shapes the profiled element, - a first head module (13) carrying at least a first extruder (14) for supplying a first group of constituent materials of the profiled element (2), The device (1) is characterized in that it comprises: - engagement means (19) capable of moving the tool module (10) in a first direction, called "engagement direction" (Z), with respect to the first bearing (4) and with respect to the first head module (13), so as to be able to alternately: bring the tool module (10) towards the roller (3) until it comes to rest against a counterstop (18) rigidly fixed to the first bearing (4), causing the tool module (10) to be subjected to a pre-tightening force (F_Z) oriented in the engagement direction (Z) opposite the counterstop (18) and the first bearing (4), so that the tool module (10) is in a configuration, called "engagement configuration", with respect to the roller (3) that defines a desired void (12) for the production of the profiled element, the height (H12) of the void (12) considered radially with respect to the roller (3) being between 0.1 mm and 150 mm; or vice versa, move the tool module (10) away from the roller (3) and the counterstop (18) to place the tool module (10) in a disengagement configuration different from the engagement configuration, - a second head module (23), - coupling means (29) that give the first head module (13) and / or the second head module (23) their own mobility in a second direction, called "coupling direction" (X), with respect to the first bearing (4) and with respect to the tool module (10), said second direction being oriented transversely to the engagement direction (Z), so that the coupling means (29) make it possible to alternately: when the tool module is in the engagement configuration, bring the first head module (13) and the second head module (23) closer to each other in the coupling direction (X) on both sides of the tool module (10), so as to place the first extruder (14) in communication with the tool module (10) and to clamp the tool module (10) between the first head module (13) and the second head module (23) in a configuration called "closed configuration"; or vice versa, move the first head module (13) away from the second head module (23) in the coupling direction (X), so as to place the first extruder (14) out of communication with the tool module (10) and to release the tool module (10) to allow its movement in the engagement direction (Z) with respect to the bearing (4) and with respect to the first and second head modules (13, 23).

10. The apparatus of claim 9, wherein, The first bearing (4) comprises a seat (67) and the first head module (13) comprises a first retaining member (61) in the form of a hook, while the second head module (23) comprises a second retaining member (66) in the form of a hook, said first and second retaining members (61, 66) being arranged to occupy a position opposite the seat (67) of the first bearing (4) to retain and block said first bearing (4) in the engagement direction (Z) against the pre-tightening force (F_Z) exerted by the tool module (10) on said first bearing (4).

11. The apparatus of claim 10, wherein, By means of a first carriage (30) guided in the coupling direction (X) by a first guide rail (31) and carrying the first head module (13) and a second carriage (40) guided in the coupling direction (X) by a second guide rail (41) and carrying the second head module (23), the coupling device (29) allows the first head module (13) carrying the first retaining member (61) and the second head module (23) carrying the second retaining member (66) to move towards each other into a configuration called "pre-positioning configuration", in which said first and second head modules (13, 23) define a passage for the tool module (10) between them, and in which pre-positioning configuration the first and second retaining members (61, 66) occupy a position opposite the seat (67) of the first bearing (4) in the engagement direction (Z) and at a distance from said seat (67) in said engagement direction not equal to zero, called "pre-tightening clearance" (JZ), which is between 0.1 mm and 1 mm, and said engagement device (19) is designed to move the tool module (10) through the passage defined by the first and second head modules (13, 23) in the engagement direction (Z) by means of the elevator (20) until said tool module (10) comes into contact with the abutment stop (18) rigidly fixed to the first bearing (4), then to continue moving said tool module (10) by means of at least one pre-loading actuator (21, 22) having a ramp (21A, 22A) which abuts against the tool module (10) transversely to the engagement direction (Z), by driving the first bearing (4) and said tool module (10) together in the same engagement direction (Z) until the seat (67) of said first bearing (4) abuts against the first and second retaining members (61, 66), thus eliminating the pre-tightening clearance (JZ), and thereby placing the tool module (10) in the engagement configuration, and said coupling device (29) is also designed to be able to bring the first and second head modules (13, 23) closer to each other in the coupling direction, against the tool module (10), in order to place said first and second head modules (13, 23) in the closed configuration.

12. The apparatus of claim 10 or 11, wherein, The device comprises at least one lateral stabilizing member (72) distinct from the first and second head modules, arranged in the closed configuration to block and push the first bearing (4) in the coupling direction (X) transverse to the engagement direction (Z) by engaging a force between the base (67) of the first bearing (4) and at least one of the first and second head modules (13, 23) in such a way as to oppose the first and second head modules (13, 23) of the clamping tool module (10).

13. The apparatus of claim 9, wherein, The tool module (10) is delimited in the coupling direction (X) by a first receiving face (10A) and a second receiving face (10B), the first head module (13) being intended in the closed configuration to abut against said first receiving face (10A) so as to put the first extruder (14) in communication with the tool module (10) and to exert a clamping force (F_X), the second head module (23) being intended in the closed configuration to abut against said second receiving face (10B) so as to exert a clamping force (F_X), said first and second receiving faces (10A, 10B) being flat and each oriented with respect to the engagement direction (Z) so that the angle of inclination between the receiving face (10A, 10B) concerned and the engagement direction (Z) is less than 10 degrees, so that said first and second receiving faces (10A, 10B) are substantially or even completely parallel to each other and substantially or even completely parallel to the engagement direction (Z), and the coupling direction (X) forms an angle with respect to the engagement direction (Z) of between 70 and 110 degrees.

14. The apparatus of claim 9, wherein, The first extruder (14) comprises at least one screw (15) in a sleeve (16), said screw (15) rotating about its longitudinal axis (X15) and said longitudinal axis (X15) being parallel to the coupling direction (X) within + / - 10 degrees.

15. The apparatus of claim 9, wherein, The coupling device (29) comprises a locking mechanism (50) comprising a first jaw (51) and a second jaw (52), said first jaw (51) and second jaw (52) being movably mounted in a third direction (Y) transverse to the engagement direction (Z) and transverse to the coupling direction (X), and said first jaw (51) and said second jaw (52) being arranged so that when the tool module (10) is in the engagement configuration, they can be moved towards each other in said third direction on both sides of the tool module (10) in order to engage each with the first head module (13) on the one hand and with the second head module (23) on the other hand, so as to force said first and second head modules (13, 23) to move towards each other and clamp the tool module (10) in the coupling direction (X), thus putting the device (1) in the closed configuration.

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