Apparatus and method for transferring plies to a carcass assembly of a tire building drum

Abstract

The invention relates to a transfer device and method for transferring plies onto a carcass assembly on a tire building drum, wherein the transfer device comprises a transfer ring having a first ring segment and a frame extending circumferentially around a central axis for holding the first ring segment in a first angular position distributed circumferentially along the frame, wherein the first ring segment is movable in radial direction from a first radial distance to a second radial distance from the central axis, the second radial distance being smaller than the first radial distance, wherein the transfer device further comprises two shoulder wheels separable by a variable width in axial direction parallel to the central axis to match the width of one or more plies in axial direction.

Description

[0001] This application is a divisional application of the invention patent application with application number 202010099294.3, application date February 18, 2020, entitled "Apparatus and method for transferring a ply layer to a tire carcass assembly of a tire forming drum". Technical Field

[0002] The present invention relates to a transfer apparatus and method for transferring one or more ply layers to a carcass package on a tire forming drum. Background Technology

[0003] Known transfer devices include a transfer ring for transferring a cushioning ply onto a tire carcass assembly on a tire forming drum. The transfer ring has multiple segments and a frame extending circumferentially about a central axis for holding the segments in multiple angular positions distributed circumferentially along the frame. The segments are radially movable relative to the frame to hold and release the cushioning ply. The transfer ring also includes: a center roller for stitching the cushioning ply onto the tire carcass assembly on the tire forming drum in a central region; and two shoulder rollers for stitching the cushioning ply along the shoulders of the tire to be formed. Summary of the Invention

[0004] A known drawback of transfer equipment is that the center roller and the two shoulder rollers occupy a portion of the circumference of the transfer ring, typically at the top. At this angular location, there is no space to install the ring segments. Therefore, the circumferential distribution of the ring segments along the frame is locally interrupted. Simultaneously, industry demands increasingly thinner cushioning cord layers, which are more prone to deformation when not properly engaged by the ring segments of the transfer ring. Specifically, without ring segments at the locations of the center roller and the two shoulder rollers, the thinner cushioning cord layers tend to exhibit unpredictable behavior and / or significant bulging.

[0005] To address this issue, the applicant considered lowering the center roller to provide additional support for the cushioning fabric layer where the loop segment is absent. However, the cylindrical shape and / or free-rolling nature of the center roller actually increases the unpredictable behavior of the thinner cushioning fabric layer.

[0006] Therefore, with known transfer devices, it is difficult to maintain the thinner buffer ply as a circle in order to reliably transfer the buffer ply to the tire carcass assembly on the tire forming drum.

[0007] The object of the present invention is to provide a transfer device and method for transferring one or more ply layers to a tire carcass assembly on a tire forming drum, wherein the reliability of the transfer can be improved.

[0008] According to a first aspect, the present invention provides a transfer device for transferring one or more ply fibers to a carcass assembly on a tire forming drum, wherein the transfer device includes a transfer ring having a plurality of first ring segments and a frame extending circumferentially around a central axis for holding the plurality of first ring segments distributed along the frame in the circumferential direction, wherein the plurality of first ring segments are movable relative to the frame in a radial direction perpendicular to the central axis from a first radial distance to a second radial distance from the central axis, the second radial distance being less than the first radial distance, wherein the transfer device further includes two shoulder pulleys, the two shoulder pulleys being inserted in an angular position between the plurality of first ring segments in the circumferential direction for stitching one or more ply fibers to the carcass assembly on the tire forming drum, wherein the two shoulder pulleys are movable at the second radial distance in an axial direction parallel to the central axis, separating by a variable width to match the width of the one or more ply fibers in the axial direction.

[0009] Two shoulder rollers can be used to press or sew one or more ply layers onto a shaped tire carcass on a tire forming drum, i.e., by following the contour of the carcass’ so-called “shoulder”.

[0010] In another embodiment, the transfer device includes a further ring segment positioned at an angular location between two shoulder rollers at a second radial distance from the central axis. This further ring segment can alternate with or supplement the two shoulder rollers at its angular location. Specifically, when transferring the one or more ply layers onto the carcass assembly on the tire forming drum, the further ring segment can contact, engage, and / or hold the one or more ply layers at the angular location. Therefore, the one or more ply layers can be held and / or supported more uniformly circumferentially by the transfer device, thereby reducing and / or preventing the adverse effects of the absence of the first ring segment at the third angular location.

[0011] According to a second aspect, the present invention provides a method for transferring one or more ply layers onto a carcass assembly on a tire forming drum using the aforementioned transfer device, wherein the method includes the step of: moving two shoulder pulleys apart by a variable width at a second radial distance along an axial direction parallel to a central axis to match the width of the one or more ply layers in the axial direction. The two shoulder pulleys may provide additional support for the one or more ply layers at their longitudinal edges during transfer.

[0012] In one embodiment, the transfer device includes another ring segment, wherein the method includes the step of positioning the other ring segment at a second radial distance from the central axis at an angular position between two tire shoulder rollers.

[0013] In another embodiment, the two tire shoulder pulleys are at a second radial distance during transmission to provide additional support for one or more ply layers at their longitudinal edges during transmission.

[0014] Wherever possible, the various aspects and features described and illustrated in the specification may be applied individually. These individual aspects, particularly those described in the appended dependent claims, may be subject to the divisional patent application. Attached Figure Description

[0015] The invention will be explained based on exemplary embodiments shown in the schematic drawings, in which:

[0016] Figures 1 to 4 A side view of a transfer device according to a first embodiment of the invention is shown during different steps of a method for transferring one or more ply layers to a carcass assembly on a tire forming drum. The transfer device has a transfer ring, a first rolling device, a second rolling device, a first ring segment, and a second ring segment.

[0017] Figure 5 A side view of an alternative transfer device according to a second embodiment of the present invention is shown;

[0018] Figure 6 , Figure 7 as well as Figure 8 They respectively showed according to Figure 1 , Figure 3 as well as Figure 4 A three-dimensional diagram of the transmission equipment; and

[0019] Figure 9 A perspective view of another alternative transfer device according to a third embodiment of the present invention is shown. Detailed Implementation

[0020] Figures 1 to 4 as well as Figures 6 to 8 A transfer device 1 according to a first embodiment of the present invention is shown. The transfer device 1 is used to transfer one or more ply layers (not shown, specifically one or more cushioning ply layers) to a tire carcass assembly (not shown) on a tire forming drum 9.

[0021] The tire forming drum 9 comprises a plurality of radially expandable drum segments 90 that form the tire carcass (not shown) in a manner known per se. The tire forming drum 9 includes a plurality of magnets distributed above the drum segments 90. The plurality of magnets includes one or more tip magnets 91, which are used to hold the front or end tip and / or rear tip or end tip of one or more ply layers. The magnets can be of different types, sizes, or strengths. Alternatively, all magnets can be of the same type, size, and / or strength, but the number of magnets per drum segment can vary. Typically, the tip magnets 91 generate the largest or strongest magnetic field.

[0022] like Figure 1 and Figure 6 As shown, the transfer device 1 includes a transfer ring 2 for holding one or more ply layers during transfer toward and / or to a tire carcass assembly on a tire forming drum 9. The transfer ring 2 includes a plurality of first ring segments 3 and a frame 20 extending circumferentially C about a central axis S for holding the plurality of first ring segments 3. The frame 20 is arranged to hold each of the plurality of first ring segments 3 in a corresponding first angular position A1. The first angular positions A1 of the plurality of first ring segments 3 are distributed circumferentially C along the frame 20. In the context of this invention, "angular position" is to be interpreted as the orientation of an object (in this case, the first ring segment 3) relative to a reference position, represented by the amount of rotation required to change from one orientation to another about the central axis S. The first angular position A1 can, for example, be expressed in degrees or radians relative to a zero position (typically the top of the transfer ring 2). In this exemplary embodiment, the first angular positions A1 are uniformly spaced at approximately forty degrees.

[0023] Note that the frame 20 itself need not be circular in order to maintain the first ring segment 3. In this exemplary embodiment, the inner contour of the frame 20 is circular, while the outer contour can have any suitable shape depending on the construction of the transfer device 1. The frame 20 may, for example, hold one or more actuators for controlling the operation and / or movement of the transfer device 1. Moreover, the frame 20 may be interrupted along the circumferential direction C, for example as shown at the top. Therefore, the frame 20 does not necessarily have to form a closed loop.

[0024] Each of the plurality of first ring segments 3 includes a gripper head 30 and an arm 31 that connects the gripper head 30 to a radial actuator (not shown) for the corresponding first ring segment 3 in the frame 20.

[0025] For example in comparison Figure 1 and Figure 3 or Figure 6 and Figure 8 As shown, multiple first ring segments 3 can be positioned relative to the frame 20 at a first radial distance R1 perpendicular to the central axis S. Figure 3Move to or continue moving to the second radial distance R2 from the central axis S. Figure 1 The second radial distance is less than the first radial distance R1. In other words, multiple first ring segments 3 are in Figure 1 It is in an expanding state toward the central axis S, and in Figure 3 The middle section is in a contracted state away from the central axis S. The second radial distance R2 can be selected to approximately match the diameter of one or more fabric layers to be transferred. Therefore, at the second radial distance R2, the gripper heads 30 of the plurality of first ring segments 3 are arranged to abut and / or contact one or more fabric layers. The first ring segments 3 may be provided with one or more retaining elements (not shown) for retaining one or more fabric layers to the corresponding first ring segment 3. The gripper heads 30 may, for example, be provided with one or more magnets, vacuum openings, and / or needles that engage one or more fabric layers.

[0026] The plurality of first ring segments 3 are preferably fixed relative to rotation of the frame 20. More specifically, the first ring segments 3 do not move like rotating bodies (such as rollers). In other words, the plurality of first ring segments 3 can move to come into close contact with or to one or more fabric layers, and can subsequently remain stationary or substantially stationary relative to the frame 20 during transfer to reliably hold the one or more fabric layers.

[0027] like Figure 1 and Figure 6 As shown, the transfer device 1 also includes a first rolling device 4 that can be positioned in a second corner position A2 and a second rolling device 5 that can be positioned in a third corner position A3. In this exemplary embodiment, the second corner position A2 and the third corner position A3 are located at or near the top of the frame 20. The second corner position A2 and the third corner position A3 may also be in alternative positions, i.e., at or near a side of the frame 20, or even at the bottom of the frame. The second corner position A2 and the third corner position A3 are inserted or placed between a plurality of first corner positions A1 along the circumferential direction C. Specifically, the second corner position A2 and the third corner position A3 are located between two consecutive first corner positions A1 along the circumferential direction C. In the example shown, the second corner position A2 and the third corner position A3 are positioned close to each other, i.e., as a group between two consecutive first corner positions A1. Alternatively, the second corner position A2 and the third corner position A3 may be separate and / or between different pairs of consecutive first corner positions A1.

[0028] The second corner position A2 is positioned off-center along the circumferential direction C between two consecutive first corner positions A1 of a plurality of first corner positions A1 to prevent harmonic effects in one or more layers of fabric during transmission.

[0029] Preferably, the rolling devices 4, 5 are arranged to roll over one or more ply layers to press, sew, and / or splice them onto the tire carcass at the tire forming drum 9. In this example, both rolling devices 4, 5 include rollers. Specifically, the first rolling device 4 includes a center roller 40 for pressing, sewing, and / or splicing the central regions of one or more ply layers onto the tire carcass (not shown) at the tire forming drum 1 in a manner known per se. The center roller 40 is rotatable about a roller axis parallel to the axial direction X. The first rolling device 4 also includes an arm 41 for holding the center roller 40 relative to the frame 20. Figure 6 As best seen in the image, the second rolling device 5 includes two shoulder rollers 51, 52, which are used to press, stitch, and / or splice one or more ply layers around the so-called "shoulder" of the shaped tire carcass (not shown) on the tire forming drum 1 in a manner known per se. The shoulder rollers 51, 52 may be spaced apart by a variable width W in an axial direction X parallel to the central axis S.

[0030] like Figure 3 and Figure 7 As shown, the first rolling device 4 and / or the second rolling device 5 may be positioned at a second radial distance R2 from the central axis S to optionally help retain one or more fabric layers during transfer. In this exemplary embodiment, as Figure 1 As shown, the transfer device 1 includes a first roller driver 81 and a second roller driver 82 for driving the first rolling device 4 and the second rolling device 5, respectively. The first rolling device 4 and / or the second rolling device 5 can move radially R toward and beyond a second radial distance R2. More specifically, the first rolling device 4 and / or the second rolling device 5 can move to or all the way to a third radial distance R3 less than the second radial distance R2. At the third radial distance R3, the first rolling device 4 and / or the second rolling device 5 are located radially inside the first ring segment 3 at or near the tire forming drum 9, for pressing, sewing, and / or splicing one or more ply layers onto the tire carcass (not shown) at the tire forming drum 9.

[0031] Note that the first ring segment 3 is not present at the positions of the first rolling device 4 and the second rolling device 5 at the second corner position A2 and the third corner position A3, respectively. There is simply no space at each corner position A2, A3 to accommodate the conventional first ring segment 3. Therefore, at least locally at the second corner position A2 and / or the third corner position A3, one or more fabric layers cannot be held together by multiple first ring segments 3. This may lead to deformation of one or more fabric layers. The present invention aims to solve this problem as explained below.

[0032] like Figure 1 and Figure 6As shown, the transfer device 1 also includes a second ring segment 6, which can be positioned in a second angular position A2, and thus in the same angular position as the first rolling device 4. Specifically, the second ring segment 6 can be positioned at a second radial distance R2 from the central axis S. Thus, the second ring segment 6 can help retain one or more fabric layers during transfer where the multiple first ring segments 3 cannot hold them. The second ring segment 6 may be provided with one or more retaining elements (not shown) for retaining one or more fabric layers to the second ring segment 6. The second ring segment 6 may, for example, be provided with one or more magnets, vacuum openings, and / or needles for engaging one or more fabric layers.

[0033] For example in comparison Figure 1 and Figure 4 or Figure 6 and Figure 8 As shown, the second ring segment 6 can move radially R from a second radial distance R2 toward a first radial distance R1, and vice versa. More specifically, both the first rolling device 4 and the second ring segment 6 can move radially R. In this exemplary embodiment, the first rolling device 4 and the second ring segment 6 can move coaxially along the radial R. In other words, the first rolling device 4 and the second ring segment 6 can move along the same axis, which is an axis aligned with or collinear with the second angular position A2.

[0034] The second ring segment 6 can be arranged to move together with the first ring segment 3 from a first radial distance R1 to a second radial distance R2. In other words, the transfer device 1 can be provided with a control unit (not shown) that controls the drivers of the first ring segment 3 and the second ring segment 6 so that the corresponding ring segments 3 and 6 move simultaneously and to the same extent.

[0035] like Figure 1 As schematically shown, the transfer device 1 includes a second ring segment driver 83, which is positioned to the side of the arm 41 of the first roller driver 81 and / or the first rolling device 4, such that it does not interfere with the operation of the first roller driver 81 or the movement of the first rolling device 4. Therefore, the first rolling device 4 and the second ring segment 83 can be operated, controlled, and / or moved independently.

[0036] like Figure 3 and Figure 7As shown, the second ring segment 6 is adapted, constructed, shaped, and / or sized to accommodate the first rolling device 4 when both the second ring segment 6 and the first rolling device 4 are simultaneously in a second angular position A2 at a second radial distance R2. Specifically, the second ring segment 6 allows at least a portion of the first rolling device 4 to pass through the second ring segment 6. Specifically, the second ring segment 6 allows the entire first rolling device 4 to extend beyond or pass through the second ring segment 6. Thus, the first rolling device 4 can move partially or completely through or protrude beyond the second ring segment 6 to reach a third radial distance R3 from the central axis S, as... Figure 4 As shown. Figure 4 and Figure 8 As illustrated by example, while the first rolling device 4 is held in place at the second radial distance R2 and passes along the first rolling device 4, the second ring segment 6 can also retract from the second radial distance R2 toward the first radial distance R1.

[0037] like Figure 6 As best seen in the image, the second ring segment 6 includes: a first leg 61 extending on a first side of the first rolling device 4 in the circumferential direction C; and a second leg 62 extending on a second side of the first rolling device 4 in the circumferential direction C opposite to the first side. The two legs 61, 62 are capable of contacting one or more fabric layers at a second radial distance R2 on opposite sides of the first rolling device 4 in the circumferential direction C without interfering with the operation of the first rolling device 4. Preferably, the legs 61, 62 form contact surfaces for contacting one or more fabric layers, which interact with one or more fabric layers in a manner similar to the gripper heads 30 of the plurality of first ring segments 3. Specifically, the legs 61, 62 form contact surfaces extending linearly parallel to the central axis S. Note that the gripper heads 30 of the plurality of first ring segments 3 are slightly concave compared to the second radial distance R2, thereby also contacting one or more fabric layers along two linearly extending parallel contact surfaces.

[0038] One or more retaining elements of the second ring segment may be provided in or at legs 61 and 62.

[0039] The second ring segment 6 also includes a first connecting member 63 and a second connecting member 64, which interconnect the first leg 61 and the second leg 62 on the third side of the first rolling device 4 in an axial direction X parallel to the central axis S and on the fourth side of the first rolling device 4 in an axial direction X opposite to the third side, respectively. By interconnecting the first leg 61 and the second leg 62, the legs 61 and 62 of the second ring segment 6 can be positioned more accurately relative to each other. In other words, the second ring segment 6 can be more rigid. In addition, when the second ring segment 6 and the first rolling device 4 are simultaneously at a second radial distance R2, the first leg 61, the second leg 62, the first connecting member 63, and the second connecting member 64 can form a shell surrounding the first side, the second side, the third side, and the fourth side of the first rolling device 4. In other words, the second ring segment 6 is hollow so as to at least partially accommodate the first rolling device 4 within its outer boundary.

[0040] As in Figure 1 As best seen in the image, the second ring segment 6 also includes an arm 65 extending along one side of the first rolling device 4 in the circumferential direction C for holding the second ring segment 6 relative to the frame 20. Specifically, the arm 65 of the second ring segment 6 operatively connects the second ring segment 6 to a corresponding second ring segment driver 83. The arm 65 is positioned to the side of the first rolling device 4 such that it does not interfere with the radial movement of the first rolling device 4. Note that the arm 65 of the second ring segment 6 may alternatively be positioned on one side of the first rolling device 4 in the axial direction X parallel to the central axis S.

[0041] The second ring segment 6 can be adapted to existing transfer equipment. In this case, all the above-described features of the second ring segment 6 should be interpreted as suitable for use in the existing transfer equipment with a first rolling device.

[0042] Figure 5 An alternative transfer device 101 according to a second embodiment of the invention is shown, which differs from the previously discussed transfer device 1 in that it includes a third ring segment 7, which can be positioned at a third angular position A3 at a second radial distance R2 from the central axis S. The third ring segment 7 may have the same features as the aforementioned second ring segment 6, except that it is now adapted, constructed, shaped, and / or sized to partially or completely accommodate the second rolling device 5. Thus, the third ring segment 7 can be used to provide additional support for one or more fabric layers at the position of the third angular position A3. For this purpose, the alternative transfer device 101 includes a third ring segment driver 84 that drives the third ring segment 7 radially R from the second radial distance R2 toward the first radial distance R1 and vice versa.

[0043] Figure 9Another alternative transfer device 201 according to a third embodiment of the invention is shown, which differs from the previously discussed transfer devices 1, 101 in that its second ring segment 206 includes: a first leg 261 extending on a first side of the first rolling device 4 in an axial direction X parallel to the central axis S; and a second leg 262 extending on a second side of the first rolling device 4 in an axial direction X opposite to the first side. The two legs 261, 262 are capable of contacting one or more fabric layers at a second radial distance R2 on opposite sides of the first rolling device 4 in an axial direction X parallel to the central axis S without interfering with the operation of the first rolling device 4. The second ring segment 206 may again be provided with one or more retaining elements, in which case these retaining elements may be provided in the legs 261, 262. Similar to... Figure 6 Legs 61 and 62 shown are shown. Figure 9 Legs 261 and 262 are interconnected by interconnecting members 263 and 264, which in this particular example extend along a third side of the first rolling device 4 in the circumferential direction C and along a fourth side of the first rolling device 4 opposite to the third side in the circumferential direction C, respectively. In the context of most claims, the second ring segment can be as follows: Figures 1 to 4 as well as Figures 6 to 8 The second segment 6 shown, or as... Figure 5 The third ring segment 7 is shown. Furthermore, it should be noted that the claims do not exclude the provision of, for example, [the following] within the same transmission devices 1, 101, 201. Figures 1 to 4 as well as Figures 6 to 8 The second ring segment 6 shown and as follows Figure 5 The third ring segment 7 shown here further optimizes the support of one or more fabric layers during transmission. This is particularly effective when the first rolling device 4 and the second rolling device 5 are in separate, spaced-apart angular positions A2 and A3.

[0044] Now refer to the following Figures 1 to 4 as well as Figures 6 to 8 A method for transferring one or more ply layers (specifically, buffer layers) to a tire carcass assembly on a tire forming drum 9 is briefly described.

[0045] Figure 1 and Figure 6 This illustrates the case where the second ring segment 6 is positioned and / or moved radially along the radial direction R at a second angular position A2 at a second radial distance R2 from the central axis S. As described above, the second ring segment 6 can move together with the first ring segment 3 (i.e., simultaneously) from the first radial distance R1 to the second radial distance R2. Figure 1 and Figure 6In this process, the first rolling device 4 remains retracted toward, or held at, or near, the first radial distance R1. Note that alternatively, before or simultaneously with the step of positioning the second ring segment 6 at the second angular position A2 at the second radial distance R2, the first rolling device 4 may have already moved toward or towards the second radial distance R2. In this case, the second ring segment 6 will either accommodate the first rolling device 4 at the second radial distance R2 or be moved to a position for accommodating the first rolling device 4 at the second radial distance R2.

[0046] In this example, such as Figure 2 As shown, the first rolling device 4 only moves toward the second radial distance R2 after the second ring segment 6 has reached the second radial distance R2. Note that the first rolling device 4 may stop shortly after the second radial distance R2 to prevent it from accidentally contacting one or more fabric layers. Specifically, the first rolling device 4 may be positioned inside the second ring segment 6, with the legs 61, 62 of the second ring segment 6 protruding radially beyond the first rolling device 4 to reach the second radial distance R2.

[0047] Figure 3 and Figure 7 This illustrates a situation where both the first rolling device 4 and the second ring segment 6 have moved to or are at a second radial distance R2 from the central axis S.

[0048] Figure 4 and Figure 8 The illustration shows a scenario where the first rolling device 4 has moved through the second ring segment 6 toward or towards a third radial distance R3 from the central axis S. In this case, the second ring segment 6 retracts from the second radial distance R2 toward or towards the first radial distance R1, thus passing through or through the first rolling device 4. In other words, the first rolling device 4 has completely passed through the second ring segment 6. Alternatively, the second ring segment 6 may be held in place at the second radial distance R2, in which case the first rolling device will only partially extend through the second ring segment 6 to contact one or more fabric layers at the third radial distance R3.

[0049] Those skilled in the art will recognize that the foregoing steps of this method, with necessary modifications, are applicable to... Figure 5 The third segment 7.

[0050] Optionally, the method includes the following steps: Figure 6As shown, the two shoulder pulleys 51, 52 are positioned at a third angular position A3 at a second radial distance R2; and they are moved or spaced apart along an axial direction X parallel to the central axis S to a width W that matches or substantially matches the width of one or more ply layers in the axial direction X. In this way, the two shoulder pulleys 51, 52 can provide additional support for one or more ply layers at their longitudinal edges during transmission. Note that this principle can be applied independently of the invention, i.e., without using the second ring segment 6 or the third ring segment 7.

[0051] Alternatively, the method may include the following steps: concentrically arranging the tire forming drum 9 within the transfer ring 1, i.e., having its axis of rotation collinear with the central axis S of the transfer device 1; and rotating the tire forming drum 9 about the central axis S to a transfer position, such as... Figure 1 As shown. In the transfer position, one or more pointed magnets 91 are offset circumferentially C from the second angular position A2 by an offset angle H ranging from 90 degrees to 180 degrees, and preferably from 140 degrees to 180 degrees. The pointed magnets 91 are typically the magnets with the strongest magnetic field on the tire forming drum 9. By offsetting one or more pointed magnets 91, the influence of this strong magnetic field on the position of one or more ply layers at the second angular position A2 can be reduced and / or minimized. Note that this principle can also be applied independently of the invention, i.e., without using the second ring segment 6 or the third ring segment 7.

[0052] It should be understood that the above description is included to illustrate the operation of preferred embodiments and is not intended to limit the scope of the invention. Many variations that still fall within the scope of the invention will become apparent to those skilled in the art from the above discussion.

[0053] List of reference numerals in the attached figures

[0054] 1. Transfer equipment

[0055] 2. Transfer loop

[0056] 20 Framework

[0057] 3. First Ring Section

[0058] 30. Handle head

[0059] 31 arms

[0060] 4 First rolling device

[0061] 40 center roller

[0062] 41 arms

[0063] 5 Second rolling device

[0064] 51 Tire shoulder roller

[0065] 52 tire shoulder rollers

[0066] 6. Second Ring Section

[0067] 61 First Leg

[0068] 62 Second leg

[0069] 63 First connecting member

[0070] 64 Second connecting member

[0071] 65 arms

[0072] 7. Third Ring Section

[0073] 81 First Roller Driver

[0074] 82 Second Roller Driver

[0075] 83 Second Ring Drive

[0076] 84 Third-stage drive

[0077] 9 Tire forming drum

[0078] 90 drum sections

[0079] 91. Tip magnet

[0080] 101 Alternative transfer equipment

[0081] 201 Another alternative transfer device

[0082] 206 Second Ring Section

[0083] 261 First Leg

[0084] 262 Second leg

[0085] 263 First interconnection component

[0086] 264 Second Interconnection Component

[0087] A1 First corner position

[0088] A2 Second corner position

[0089] A3 Third corner position

[0090] C Zhou Xiang

[0091] H offset angle

[0092] R radial

[0093] R1 First radial distance

[0094] R2 Second radial distance

[0095] R3 Third radial distance

[0096] S-center axis

[0097] W width

[0098] X-axis

Claims

1. A method for transferring one or more ply fabric layers onto a carcass assembly on a tire forming drum using a transfer device, wherein, The transfer device includes a transfer ring having a plurality of first ring segments and a frame extending circumferentially around a central axis for holding the plurality of first ring segments distributed circumferentially along the frame, wherein the plurality of first ring segments are movable relative to the frame in a radial direction perpendicular to the central axis from a first radial distance from the central axis to a second radial distance from the central axis, the second radial distance being less than the first radial distance, wherein the transfer device further includes two tire shoulder pulleys, which, in an angular position inserted circumferentially between the plurality of first ring segments, are used to stitch one or more ply layers to the tire carcass assembly on the tire forming drum, wherein the two tire shoulder pulleys are movable at the second radial distance in an axial direction parallel to the central axis, separating by a variable width to match the width of the one or more ply layers in the axial direction, the method comprising the following steps: - During the use of the transfer equipment, one or more ply layers are transferred to the carcass assembly on the tire forming drum; and - The two shoulder pulleys are moved apart at a second radial distance along an axial direction parallel to the central axis to match the width of the one or more ply in the axial direction, wherein the two shoulder pulleys at the second radial distance during the transfer provide additional support for the one or more ply at the longitudinal edges of the one or more ply during the transfer.

2. The method according to claim 1, wherein, The transfer device includes another ring segment, wherein the method includes the step of positioning the other ring segment at an angular position between two tire shoulder wheels at a second radial distance from the central axis.

Images