A tread joint sewing apparatus and a tread joint sewing method

Abstract

The application provides a tread joint sewing device and a use method thereof. The tread joint sewing device comprises a compression roller matched with a belt layer drum to transmit a tread rubber, and a sewing device located upstream of the compression roller. The sewing device comprises a compression plate, a driving mechanism hinged to one end of the compression plate and used to drive the compression plate to move back and forth, and the compression plate has a plurality of compression grooves arranged on a first arc-shaped surface of the compression plate, and arc-shaped compression teeth are formed between adjacent compression grooves. After the compression plate is lowered, the compression plate is in contact with the compression roller, and the compression roller presses the compression teeth into a tread joint of the tread rubber. As can be seen from the above description, the tread joint sewing device provided by the application increases the sewing device upstream of the compression roller, and when the belt layer drum transmits the tread rubber, the compression plate in the sewing device is pressed into the tread joint of the tread rubber by the compression roller, so that sewing is realized, the efficiency of the tread joint sewing is improved, and energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of tire technology, and in particular to a tread joint stitching device and a tread joint stitching method. Background Technology

[0002] The tread is one of the semi-finished materials in tire production. Current tire manufacturing processes primarily use ply bonding, and the tread, as a crucial tire component, is also completed through ply bonding. This process inevitably involves the length setting, cutting, conveying, and bonding of the tread material. When the cut surfaces are bonded to the belt drum, there is an overlap joint between the beginning and end of the material. The bonding quality of this joint directly affects the tire's quality. To improve this joint quality, designers have considered many methods and added several processes, such as using tread joint heat lamps to soften the joint and increase its adhesion, supplementing this with multi-piece roller pressing to enhance the bonding effect, or manual pressing of the joint, etc. These processes not only increase the number of steps but also consume a significant amount of time in tire production, severely reducing production efficiency and energy consumption, with limited effectiveness. Summary of the Invention

[0003] The purpose of this invention is to provide a tread joint sewing device for facilitating the sewing of tread rubber materials.

[0004] In a first aspect, a tread joint stitching device is provided, the tread joint stitching device comprising: a pressure roller cooperating with a belt drum to transfer tread compound, and a stitching device located upstream of the pressure roller;

[0005] The suture device includes a pressure plate and a drive mechanism hinged to one end of the pressure plate and used to drive the pressure plate to move back and forth; the pressure plate has a first convex arc-shaped surface, wherein a plurality of pressing grooves are provided on the first arc-shaped surface, the plurality of pressing grooves are arranged at intervals along the length direction of the pressure plate, and arc-shaped pressing teeth are formed between adjacent pressing grooves;

[0006] When the end of the pressure plate that is hinged to the drive mechanism descends to the first set position, the pressure plate comes into contact with the tread rubber material;

[0007] When the end of the pressure plate that is hinged to the drive mechanism descends to the second set position, the pressure plate is located below the pressure roller, and the pressure roller presses the pressing teeth into the tread joint of the tread compound.

[0008] As can be seen from the above description, the tread joint sewing equipment provided in this application embodiment achieves sewing by adding a sewing device upstream of the pressure roller, and by pressing the pressure plate in the sewing device into the tread joint of the tread rubber material through the pressure roller when the belt drum is conveying the tread rubber material, thereby improving the efficiency of tread joint sewing and reducing energy consumption.

[0009] In one specific implementation, the drive mechanism includes a drive cylinder, the piston rod of which is hinged to one end of the pressure plate.

[0010] In one specific implementation, a spindle roller is further included, the spindle roller being located upstream of the pressure roller, and the sewing device being located between the pressure roller and the spindle roller.

[0011] In one specific implementation, the pressure plate has a second arcuate surface that cooperates with the pressure roller, the second arcuate surface being a concave arcuate surface.

[0012] In one specific implementation, the pressure plate has a first end and a second end opposite to each other; wherein, the first end is the end of the pressure plate that first contacts the tread rubber material; and the second end is the end that is hinged to the drive mechanism.

[0013] Along the direction from the first end to the second end, the curvature of the first arc-shaped surface gradually decreases.

[0014] In one specific feasible implementation, the curvature of the second arcuate surface gradually increases along the direction from the first end to the second end.

[0015] In one specific implementation, the drive mechanism is hinged to the second end of the pressure plate via a hinge shaft, and the center of gravity of the pressure plate is located between the hinge shaft and the first end.

[0016] In one specific implementation, the axis of the hinge shaft is located outside the pressing groove.

[0017] Secondly, a method for stitching a tire tread joint is provided, using the tire tread joint stitching equipment described in any of the above claims, the method comprising the following steps:

[0018] The tread compound is fed to the belt drum, and the pressure roller is pressed down to press the tread compound into the belt drum.

[0019] The pressure plate is driven down by a drive mechanism to stitch the tread joint; wherein, when the end of the pressure plate that is hinged to the drive mechanism descends to a first set position, the pressure plate contacts the tread rubber; when the end of the pressure plate that is hinged to the drive mechanism descends to a second set position, the pressure plate is located below the pressure roller, and the pressure roller presses the pressing teeth into the tread joint of the tread rubber.

[0020] As can be seen from the above description, the tread joint sewing equipment provided in this application embodiment achieves sewing by adding a sewing device upstream of the pressure roller, and by pressing the pressure plate in the sewing device into the tread joint of the tread rubber material through the pressure roller when the belt drum is conveying the tread rubber material, thereby improving the efficiency of tread joint sewing and reducing energy consumption.

[0021] In one specific implementation, the method further includes:

[0022] After pressing down the pressure roller, press down the spindle roller.

[0023] In one specific implementation scheme, the step of driving the pressure plate to press down and stitch the tread joint via a drive mechanism specifically includes:

[0024] Reduce the rotational speed of the belt drum before the tail of the tread compound enters below the spindle roller;

[0025] Apply a first driving air pressure to the driving cylinder, and under the action of the first driving air pressure, drive the pressure plate to press against the tread rubber material;

[0026] The pressure plate is squeezed into the tread compound by the pressure roller, and the pressure plate can move with the tread compound by the first driving air pressure. Attached Figure Description

[0027] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments provided according to this disclosure and should not be construed as limiting the scope of this disclosure.

[0028] Figure 1 This is a schematic diagram of the structure of the tire tread joint sewing device provided in the embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the suture device provided in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the structure of the suture provided in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the structure of the pressure plate provided in the embodiments of this application;

[0032] Figure 5 A bottom view of the pressure plate provided in the embodiments of this application;

[0033] Figure 6 A front view of the pressure plate provided in an embodiment of this application;

[0034] Figure 7This is a schematic diagram of the structure of the pressure plate and the tread joint provided in the embodiments of this application;

[0035] Figure 8 for Figure 4 A magnified view of a portion of point A in the middle. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0037] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] To facilitate understanding of the tread joint sewing device provided in this application embodiment, its application scenario is first described. The tread joint sewing device provided in this application embodiment is applied to the scenario of tread sewing. Currently, tread sewing involves softening the tread with a heat lamp and then bonding the softened tread joints together. However, manually softening the tread takes a long time. Therefore, this application embodiment provides a tread joint sewing device to improve the efficiency of tread sewing. A detailed description is given below with reference to specific drawings and embodiments.

[0039] like Figure 1 and Figure 2 As shown, the tread joint sewing equipment provided in this embodiment mainly includes a belt drum 300, a pressure roller 400, and a sewing device 100. The belt drum 300 supports the tread rubber compound 200. During conveying, the pressure roller 400 cooperates with the belt drum 300 to transfer the tread rubber compound 200, forming a ring-shaped structure. Specifically, the belt drum 300 supports the tread rubber compound 200, and the pressure roller 400 presses the tread rubber compound 200 onto the belt drum 300. The tread rubber compound 200 can be adhered to the belt drum 300. As the belt drum 300 rolls, the beginning and end of the tread rubber compound 200 overlap to form a tread joint 210. Figure 1 As shown, both ends of the tread compound 200 are beveled. During overlap, the two bevels face each other, thus forming a tread joint 210. During sewing, the sewing device 100 is pressed onto the tread joint 210, thereby pressing the ends of the tread compound 200 together to achieve the sewing of the tread joint 210. For ease of understanding, a detailed description is provided below with reference to specific embodiments.

[0040] Continue to refer to Figure 1 and Figure 2 When the stitching device 100 is specifically set, the stitching device 100 is located upstream of the pressure roller 400. The upstream of the pressure roller 400 refers to the direction of transmission of the tread rubber 200. The tread rubber 200 first passes through the stitching device 100 and then passes through the pressure roller 400.

[0041] Please refer to the above. Figure 3 As shown, Figure 3 A schematic diagram of the stitching device 100 provided in an embodiment of this application is shown. The stitching device 100 provided in this embodiment includes a pressure plate 110 and a drive mechanism 120 hinged to the pressure plate 110. The pressure plate 110 is used to press against the tread joint 210 of the tread compound 200 and stitch the joint 210. (See also...) Figure 4 As shown, in the specific configuration of the pressure plate 110, the pressure plate 110 has a convex first arc-shaped surface 112, which faces the tread rubber 200 and is used to press against the tread joint 210. The first arc-shaped surface 112 is an arc-shaped surface that contacts and presses against the tread joint 210. When pressing the tread joint 210, one end of the first arc-shaped surface 112 first contacts the tread, and then the pressure plate 110 and the tread rubber 200 roll relative to each other. During the rolling process, the first arc-shaped surface 112 presses against the tread joint 210.

[0042] Please refer to the above. Figure 5 and Figure 6 As shown, to press and sew the tread joint 210 together, a plurality of pressing grooves 113 are provided on the first arc-shaped surface 112. The plurality of pressing grooves 113 are arranged at intervals along the length direction of the pressing plate 110, and when arranged at intervals, arc-shaped pressing teeth 114 are formed between adjacent pressing grooves 113. The arc-shaped pressing teeth 114 refer to the end face of the pressing teeth 114 being arc-shaped (a part of the first arc-shaped surface 112). When the first arc-shaped surface 112 contacts the tread rubber 200, the pressing teeth 114 are squeezed into the tread rubber 200, and the tail of the tread rubber 200 is squeezed into the head of the tread rubber 200 by the pressing teeth 114, so that the tail of the tread rubber 200 and the head of the tread rubber 200 interlock with each other, realizing the stitching connection between the two.

[0043] It should be understood that when the pressing groove 113 is set, the pressing groove 113 is a pressing groove with open ends, so as to facilitate the pressing plate 110 pressing the tread joint 210.

[0044] The drive mechanism 120 is used to drive the pressure plate 110 to reciprocate, wherein the direction of the reciprocating movement of the pressure plate 110 refers to the direction in which the pressure plate 110 moves closer to or further away from the tread joint 210. When the drive mechanism 120 is connected to the pressure plate 110, one end of the drive mechanism 120 is hinged to the pressure plate 110. The pressure plate 110 can move along... Figure 2 The direction of the arc of the double-headed arrow shown in the diagram swings.

[0045] When the drive mechanism 120 drives the pressure plate 110 to move, when the end of the pressure plate 110 hinged to the drive mechanism 120 descends to the first set position, the pressure plate 110 contacts the tread compound 200. Afterwards, the drive mechanism 120 continues to drive. Because the pressure plate 110 is in contact with the tread compound 200, it cannot descend further. However, due to the rotation of the belt drum 300, the pressure plate 110 rotates relative to the tread compound 200, causing the end of the pressure plate 110 hinged to the drive mechanism 120 to continue descending. When the end of the pressure plate 110 hinged to the drive mechanism 120 descends to the second set position, the pressure plate 110 is located below the pressure roller 400, and the pressure roller 400 presses the pressing teeth 114 into the tread joint 210 of the tread compound 200. That is, as the belt drum 300 rotates, the pressure plate 110 rotates along with the tread compound 200. When the end of the pressure plate 110 away from the drive mechanism 120 rotates to below the pressure roller 400, the pressure roller 400 presses the pressure plate 110 into the tread compound 200. As the pressure roller 400 rolls, the drive mechanism 120 continuously drives the end of the pressure plate 110 that is hinged to the drive mechanism 120 to move downward, thereby ensuring that the pressure plate 110 can roll with the pressure roller 400. During the process of the pressure roller 400 driving the pressure plate 110 to rotate, the pressing teeth 114 and pressing grooves 113 on the first arc-shaped surface 112 of the pressure plate 110 are embedded into the beginning and end of the tread compound 200, and the stitching state is as follows. Figure 7 and Figure 8 As shown, the tread joint 210 is thus sewn together.

[0046] As can be seen from the above description, the tread joint 210 sewing equipment provided in this application embodiment achieves sewing by adding a sewing device 100 upstream of the pressure roller 400, and by pressing the pressure plate 110 in the sewing device 100 into the tread joint 210 of the tread rubber 200 through the pressure roller 400 when the belt drum 300 is transmitting the tread rubber 200, thereby improving the efficiency of sewing the tread joint 210. In addition, when sewing the tread joint 210, there is no need to heat the tread joint 210, thereby reducing energy consumption.

[0047] Continue to refer to Figure 2As shown, the driving mechanism 120 provided in this embodiment includes a driving cylinder, the piston rod of which is hinged to one end of the pressure plate 110. When the driving mechanism 120 is fixed, the cylinder body of the driving mechanism 120 is hinged to a support base. The support base can be a support base for supporting the belt layer drum 300, or other support mechanisms, which are not specifically limited in this embodiment. When the pressure plate 110 is driven by the driving cylinder, the piston rod is extended by the first driving air pressure. When the end of the pressure plate 110 away from the piston rod contacts the tread rubber 200, the driving cylinder still maintains a high air pressure. Therefore, when the pressure plate 110 rotates with the pressure roller 400, the piston rod of the driving mechanism 120 can still extend outward to ensure that the pressure plate 110 can rotate with the pressure roller 400. In addition, the hinge between the cylinder body of the driving cylinder and the support base can also ensure that the driving cylinder will not affect the movement of the pressure plate 110, ensuring that the entire mechanism can operate normally.

[0048] It should be understood that, in addition to the driving cylinder in the example above, the drive mechanism 120 can also be a driving hydraulic cylinder, which can achieve the same effect. Of course, besides the drive mechanism 120 in the example above, drive mechanisms 120 that meet the above driving requirements can also be applied to the embodiments of this application.

[0049] Please refer to the above. Figures 4-6 , Figures 4-6 A schematic diagram of the pressure plate at different angles is shown.

[0050] In one feasible embodiment, to cooperate with the pressure roller 400, the pressure plate 110 provided in this application embodiment is further provided with a second arc-shaped surface 111, which is a concave arc-shaped surface. This makes the pressure plate 110 as a whole form a crescent-shaped structure. When the pressure plate 110 is inserted below the pressure roller 400, the second arc-shaped surface 111 cooperates with the pressure roller 400. It should be understood that the curvature of the second arc-shaped surface 111 is less than the curvature of the pressure roller 400, to ensure that the pressure roller 400 can fully contact the second arc-shaped surface 111 when cooperating with the pressure plate 110, thus ensuring the effectiveness of the pressure roller 400 in pressing the pressure plate 110 into the tread joint 210.

[0051] In one specific implementation scheme, the bottom of the pressing groove 113 provided in this application embodiment is a plane, as shown in the figure. When forming the pressing groove 113, the groove 113 can be directly cut on the first arc-shaped surface 112, thereby forming the straight groove 113 as shown in the figure. Furthermore, the formed pressing teeth 114 are also rectangular pressing teeth 114, which facilitates pressing.

[0052] Of course, it should be understood that the pressing teeth 114 provided in the embodiments of this application are not limited to the rectangular pressing teeth 114 shown in the figure. The cross-section of the pressing teeth 114 can also be triangular, rectangular or other different shapes, which can be determined according to actual needs.

[0053] When specifically setting the pressing teeth 114, to improve the stitching effect of the tread joint 210, multiple pressing teeth 114 can be of equal width; and / or multiple pressing grooves 113 can be of equal width. For example, the pressing teeth 114 and pressing grooves 113 can be of equal width. Alternatively, the pressing grooves 113 can be of equal width, while the widths of the multiple pressing teeth 114 can be unequal. Alternatively, the widths of the pressing grooves 113 can be unequal, while the widths of the multiple pressing teeth 114 can be equal. In specific settings, different configurations of the pressing teeth 114 and pressing grooves 113 can be selected as needed. In one optional scheme, multiple pressing teeth 114 and multiple pressing grooves 113 are of equal width, which results in more uniform stitching of the tread joint 210 in the width direction of the tread.

[0054] In a specific example, the width of the pressing teeth 114 is smaller than the width of the pressing grooves 113. When this is used, the pressing teeth 114 are more easily inserted into the tread joint 210, facilitating the sewing of the tread joint 210. For example, the ratio of the width of the pressing teeth 114 to the width of the pressing grooves 113 is between 0.5 and 1. Such ratios could be 0.5, 0.8, 0.9, 1, or any value between 0.5 and 1.

[0055] To facilitate the description of the first arcuate surface 112 on the pressure plate 110 provided in this application embodiment, a first end and a second end of the pressure plate 110 are defined. The first end and the second end are two opposite ends of the pressure plate 110. The first end is the end of the pressure plate 110 that first contacts the tread rubber 200; the second end is the end that is hinged to the drive mechanism 120. Referring to the figures, it can be seen that the curvature of the first arcuate surface 112 gradually decreases along the direction from the first end to the second end. Figure 3 It can be seen that the pressing teeth 114 are arranged at the position with a larger curvature of the first arc surface 112, while the position with a smaller curvature is located outside the pressing teeth 114. Therefore, by adopting the above arrangement, the pressing teeth 114 can be pressed into the tread joint 210 more quickly when the pressure plate 110 rolls.

[0056] In this embodiment, the second arcuate surface 111 can be the pressure surface of the pressure plate 110 cooperating with the drive mechanism 120. When the pressure plate 110 is pressed into the tread joint 210, the drive mechanism 120 can press the second arcuate surface 111, thereby pressing the pressure plate 110 into the tread joint 210. In one example, the curvature of the second arcuate surface 111 gradually increases along the direction from the first end to the second end. This allows it to cooperate with the arcuate pressing teeth 114, so that it can be fully pressed into the tread joint 210.

[0057] In one example, the stitching device 100 also includes a hinge shaft 115 located at the second end of the pressure plate 110 and used for hinged connection with an external drive device. For example, the drive mechanism 120 is hinged to the pressure plate 110 via the hinge shaft 115. In use, the first end of the pressure plate 110 contacts the tread compound 200 first, and then the external drive device pushes the pressure plate 110 against the tread compound 200. When the belt drum 300 rotates, the pressure plate 110 rotates with the tread compound 200, and the pressing teeth 114 are pressed into the tread joint 210.

[0058] In a specific example, the center of gravity of the pressure plate 110 is located between the hinge shaft 115 and the first end. This allows the pressure plate 110 to easily follow the rolling of the tread compound 200, facilitating the sewing of the tread joint 210.

[0059] In a specific example, the hinge shaft 115 is positioned outside the pressing groove 113, with its axis located outside the hinge shaft 115. This ensures that there is no interference between the hinge shaft 115 and the tread joint 210.

[0060] Continue to refer to Figure 1 As shown, the tread joint 210 sewing device provided in this embodiment of the application also includes a spindle roller 500, which is located upstream of the pressure roller 400, and the sewing device 100 is located between the pressure roller 400 and the spindle roller 500. The spindle roller 500 is used to cooperate with the belt drum 300 to convey the tread rubber compound 200. In use, the tread rubber compound 200 is first conveyed between the spindle roller 500 and the belt drum 300, and then the pressure roller 400 cooperates with the belt drum 300 to press the tread rubber compound 200 onto the belt drum 300. When the spindle roller 500, the pressure roller 400 and the sewing device 100 are used in combination, when the pressure plate 110 of the sewing device 100 is pressed into the tread joint 210, both the beginning and end of the tread rubber compound are structurally pressed, thereby ensuring stability during sewing.

[0061] To facilitate understanding of the tread joint 210 stitching device provided in the embodiments of this application, the following is in conjunction with... Figure 1 Let's take a closer look at how it works.

[0062] refer to Figure 1As shown, before use, the pressure roller 400, spindle roller 500, and pressure plate 110 of the sewing device 100 are returned to their initial state. In this state, the spindle roller 500, pressure roller 400, and pressure plate 110 are all away from the belt layer drum 300. When the tread compound 200 is first bonded, the pressure roller 400 presses down first, followed by the spindle roller 500, and then the belt layer drum 300 rotates relatively quickly to bond the tread compound 200. When approaching the end of the compound, the angle of approaching the end can be calculated according to the actual situation, at which point the belt layer drum 300 slows down. After the deceleration is completed, the drive mechanism 120 drives the pressure plate 110 to move down. The pressure plate 110 brings the tread rubber material 200 into the space below the pressure roller 400. As the belt layer drum 300 rotates slowly, the pressing teeth 114 of the pressure plate 110 accurately fall on the tread joint 210. Under the pressure of the pressure roller 400 and the belt layer drum 300, the pressing teeth 114 of the pressure plate 110 press into the tread joint 210, pressing the tread joint 210 together well, and completing the automatic stitching of the tread joint 210. Then, as the belt drum 300 rotates, the flat tail of the pressure plate 110 will be pressed out of the tread joint 210 by the pressure of the pressure roller 400 and the belt drum 300. After that, the spindle roller 500, pressure plate 110, and pressure roller 400 move away from the belt drum 300, and their respective drives will receive a return command, ultimately causing each component to return to the return position (e.g., ...). Figure 1 ).

[0063] In the return position, the pressure plate 110 will be lifted and placed between the spindle roller 500 and the pressure roller 400 in a free hanging state. Due to the structure of the pressure plate 110 and the effect of its center of gravity, its downward head will be in a forward tilted state, which makes it easier for the pressure plate 110 to smoothly enter between the pressure rollers 400 and 7.

[0064] In this embodiment of the application, the pressure plate 110 of the stitching device 100 has several features. First, the first arc-shaped surface 112 of the pressure plate 110 has a toothed structure. This structure can increase the pressure on the tread joint 210, thereby pressing the first arc-shaped surface 112 into the tread joint 210 so that the tread joint 210 is completely bonded together. Secondly, by adjusting the pressure of the pressure roller 400, the amount of the first arc-shaped surface 112 pressed into the tread joint 210 can be controlled to adapt to different working conditions. Secondly, the tail structure of the pressure plate 110 is designed to smoothly transition the flat surface of the pressing teeth 114 with a slight curve. This ensures a smooth transition while also ensuring that as the belt drum 300 rotates, the pressure roller 400 will press the pressing teeth 114 of the pressure plate 110 out of the tread joint 210, ensuring that the pressure plate 110 can smoothly detach from the tread joint 210. In this way, the tread joint 210 is sewn together, and the sewing machine can be smoothly separated from the tread. Thirdly, the part of the first arc-shaped surface 112 on the pressure plate 110 near the second end is designed as a flat surface with a circular arc tangent. When the drive mechanism 120 extends, as the belt drum 300 rotates slowly, the pressure plate 110 will smoothly enter the lower tangent surface of the pressure roller 400.

[0065] As can be seen from the above description, the tire tread joint 210 sewing equipment provided in this application utilizes the principle of increasing pressure by reducing the contact area under equal pressure. After pressing in the joint 210, the upper and lower layers of the tire tread joint 210 are bonded together, achieving the best bonding effect, improving the automation level of the equipment, and enhancing production efficiency and product quality.

[0066] Furthermore, the sewing device 100 is located between the spindle roller 500 and the pressure roller 400, and close to the pressure roller 400. This arrangement allows the pressure roller 400 to apply force to the pressure plate 110 without external power, while enabling continuous sewing and greatly improving production efficiency. Additionally, the sewing device 100 can be used for different specifications of working conditions, and the pressing force can be adjusted via the pressure roller 400. The pressure plate 110, with its curved surface, fully utilizes the mechanical structure to complete powerless sewing and removal. Moreover, the original lamp-heating process can be eliminated or the lamp-heating time reduced, achieving energy saving, consumption reduction, and efficiency improvement.

[0067] This application also provides a method for stitching a tire tread joint, which uses any of the above-mentioned tire tread joint stitching equipment and includes the following steps:

[0068] Step 001: The tread compound 200 is conveyed to the belt drum 300, and the pressure roller 400 is pressed down to press the tread compound 200 onto the belt drum 300.

[0069] Step 002: The pressure plate 110 is driven down by the drive mechanism 120 to sew the tread joint 210; wherein, when the end of the pressure plate 110 that is hinged to the drive mechanism 120 descends to the first set position, the pressure plate 110 contacts the tread rubber 200; when the end of the pressure plate 110 that is hinged to the drive mechanism 120 descends to the second set position, the pressure plate 110 is located below the pressure roller 400, and the pressure roller 400 presses the pressing teeth 114 into the tread joint 210 of the tread rubber 200.

[0070] Specifically, a first driving air pressure is applied to the driving cylinder, and under the action of the first driving air pressure, the pressure plate 110 is driven to press against the tread rubber material 200.

[0071] The pressure plate 110 is pressed into the tread compound 200 by the pressure roller 400, and the pressure plate 110 can move with the tread compound 200 by the first driving air pressure. See details for further information. Figures 1-3 The relevant description in the document.

[0072] Additionally, this includes reducing the rotational speed of the belt drum 300 before the tail of the tread compound 200 enters below the spindle roller 500; for details, please refer to [reference needed]. Figures 1-8 The relevant description in the document.

[0073] In addition, the method also includes:

[0074] Step 003: After pressing down the pressure roller 400, press down the spindle roller 500.

[0075] For details, please refer to [link / reference]. Figures 1-8 The relevant description in the document.

[0076] As can be seen from the above description, when using a tread joint sewing equipment to sew tread joints, by adding a sewing device 100 upstream of the pressure roller 400, and when the belt drum 300 transmits the tread rubber material 200, the pressure roller 400 presses the pressure plate 110 in the sewing device 100 into the tread joint 210 of the tread rubber material 200, thereby achieving sewing and improving the efficiency of sewing the tread joint 210. In addition, when sewing the tread joint 210, there is no need to heat the tread joint 210, thereby reducing energy consumption.

[0077] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the scope of protection of this disclosure.

[0078] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A tire tread joint sewing device, characterized in that, include: A pressure roller that engages with the belt drum to transfer tread compound, and a stitching device located upstream of the pressure roller; The suture device includes a pressure plate and a drive mechanism hinged to one end of the pressure plate and used to drive the pressure plate to move back and forth; the pressure plate has a first convex arc-shaped surface, wherein a plurality of pressing grooves are provided on the first arc-shaped surface, the plurality of pressing grooves are arranged at intervals along the length direction of the pressure plate, and arc-shaped pressing teeth are formed between adjacent pressing grooves; When the end of the pressure plate that is hinged to the drive mechanism descends to the first set position, the pressure plate comes into contact with the tread rubber material; When the end of the pressure plate that is hinged to the drive mechanism descends to the second set position, the pressure plate is located below the pressure roller, and the pressure roller presses the pressing teeth into the tread joint of the tread compound.

2. The tire tread joint stitching device according to claim 1, characterized in that, The driving mechanism includes a driving cylinder, and the piston rod of the driving cylinder is hinged to one end of the pressure plate.

3. The tire tread joint stitching device according to claim 2, characterized in that, It also includes a spindle roller located upstream of the pressure roller, and the sewing device is located between the pressure roller and the spindle roller.

4. The tire tread joint stitching device according to claim 1, characterized in that, The pressure plate has a second arc-shaped surface that cooperates with the pressure roller, and the second arc-shaped surface is a concave arc-shaped surface.

5. The tire tread joint stitching device according to claim 4, characterized in that, The pressure plate has a first end and a second end opposite to each other; wherein, the first end is the end of the pressure plate that first contacts the tread rubber material; and the second end is the end that is hinged to the drive mechanism. Along the direction from the first end to the second end, the curvature of the first arc-shaped surface gradually decreases.

6. The tire tread joint stitching device according to claim 5, characterized in that, Along the direction from the first end to the second end, the curvature of the second arcuate surface gradually increases.

7. The tire tread joint stitching device according to claim 5, characterized in that, The driving mechanism is hinged to the second end of the pressure plate via a hinge shaft, and the center of gravity of the pressure plate is located between the hinge shaft and the first end.

8. The tire tread joint stitching device according to claim 7, characterized in that, The axis of the hinge shaft is located outside the pressing groove.

9. A method for stitching a tire tread joint, characterized in that, The method using the tire tread joint stitching equipment as described in any one of claims 1 to 8 includes the following steps: The tread compound is fed to the belt drum, and the pressure roller is pressed down to press the tread compound into the belt drum. The pressure plate is driven down by a drive mechanism to stitch the tread joint; wherein, when the end of the pressure plate that is hinged to the drive mechanism descends to a first set position, the pressure plate contacts the tread rubber; when the end of the pressure plate that is hinged to the drive mechanism descends to a second set position, the pressure plate is located below the pressure roller, and the pressure roller presses the pressing teeth into the tread joint of the tread rubber.

10. The method for stitching the tread joint according to claim 9, characterized in that, Also includes: After pressing down the pressure roller, press down the spindle roller.

11. The method for stitching the tread joint according to claim 10, characterized in that, The method of pressing down the pressure plate via a drive mechanism to sew the tire tread joint; specifically including: Reduce the rotational speed of the belt drum before the tail of the tread compound enters below the spindle roller; Apply a first driving air pressure to the driving cylinder, and under the action of the first driving air pressure, drive the pressure plate to press against the tread rubber material; The pressure plate is squeezed into the tread compound by the pressure roller, and the pressure plate can move with the tread compound by the first driving air pressure.

Images