Tire tread winding forming system

Abstract

The invention provides a tire tread winding forming system, and relates to the technical field of tire forming, the tire tread winding forming system comprises an extrusion unit, a tabletting winding mechanism and a base, the extrusion unit is connected with the tabletting winding mechanism, and the extrusion unit is used for plastifying a rubber material and supplying a rubber bar to the tabletting winding mechanism; the tabletting and winding mechanism is used for calendaring the rubber stick into a rubber sheet to be output and winding the rubber sheet on the tire blank; the extrusion unit is mounted on the base, the tablet winding mechanism is pivotally connected with the base, and the base can move relative to the tire blank along any one of the radial direction and the axial direction of the tire blank so as to adjust the distance between the tablet winding mechanism and the tire blank, so that the extrusion unit and the tablet winding mechanism synchronously move. In the tire tread winding process, the extrusion unit can synchronously move along with the pressing sheet winding mechanism, and the problem that in the winding process, the distance between the extrusion unit and the pressing sheet winding mechanism is too long, so that a conveyed rubber sheet is stretched, deformed and even fractured, and the winding precision and the production continuity are affected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of tire molding, and in particular to a tire tread winding molding system. Background Art

[0002] There are two main types of tire tread molding. One is tread lamination molding, which is to extrude a strip of tread that meets the process requirements through an extruder and cut it to a fixed length. The tread is then bonded to the tire embryo, rotated for a circle, and rolled to form the joint. For tires below 25 inches, the tread lamination molding process is mainly used. The other is tread winding molding, which is to extrude a narrow film through an extruder and then spirally wind it onto the tire embryo in multiple layers. For tires above 26 inches, due to the limitation of extrusion thickness and in order to reduce labor intensity, the tread winding molding process is mainly used. Compared with the tread lamination molding process, the tread winding molding process can avoid the tread lap joint fracture defects that exist in the tread lamination molding process, and can improve tire safety, as well as the density and dynamic balance of the tire tread.

[0003] In the related art, the size of high-performance tires is usually in the range of 12 to 24 inches, the tread width is in the range of 170 to 350 mm, and the tread thickness is in the range of 3 to 12 mm. In order to ensure the quality of tire molding, when the large-size tire tread winding molding system is directly applied to the molding of high-performance tires, the following problems often occur:

[0004] 1. The extruded film is too large, and the tread profile of the winding molding will not only exceed the tread profile size range of high-performance tires, but also the width, thickness and weight accuracy of the tread profile of the winding molding will exceed the process requirements of high-performance tires;

[0005] 2. After the size of the extruded film is reduced, when the film is wound around the tire by the winding device, the film is easily stretched, deformed or even broken during the transportation process due to the long distance between the winding device and the extruder, thus affecting the winding accuracy and production continuity;

[0006] 3. The temperature of the film will be too low after the film is reduced in size and transported to the winding head after passing through the cooling drum. It is easy for air to accumulate between the films when it is wrapped around the tread. At the same time, too low a temperature will also cause the adhesion between the films to deteriorate, and the layers will easily fall off. Summary of the invention

[0007] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0008] To this end, an embodiment of the present invention proposes a tire tread winding and molding system, which can enable the extruder unit to move synchronously with the sheeting winding mechanism during the tire tread winding process, thereby avoiding the problem of the conveyed film being stretched, deformed or even broken due to the long distance between the two during the winding process, thereby affecting the winding accuracy and production continuity.

[0009] According to an embodiment of the present invention, a tire tread winding and molding system includes an extruder unit, a sheeting winding mechanism and a base, wherein the extruder unit is connected to the sheeting winding mechanism, the extruder unit is used to plasticize rubber and supply rubber sticks to the sheeting winding mechanism, the sheeting winding mechanism is used to roll the rubber sticks into films for output and wind the films around the tire blank; the extruder unit is installed on the base, the sheeting winding mechanism is pivotally connected to the base, and the base can move relative to the tire blank along any one of the radial and axial directions of the tire blank so as to adjust the distance between the sheeting winding mechanism and the tire blank, so that the extruder unit and the sheeting winding mechanism move synchronously.

[0010] According to the tire tread winding and molding system of the embodiment of the present invention, the extruder unit and the tablet winding mechanism are integrated on the same base to form a tire tread winding and molding system with a compact overall structure. In which, since the base can move relative to the tire embryo in the radial and axial directions of the tire embryo, when the film is wound on the tire embryo, the distance between the tablet winding mechanism and the tire embryo can be adjusted by changing the relative position between the base and the tire embryo, so that when the base moves in the radial direction of the tire embryo, the position of the tablet winding mechanism matches the change in the diameter of the tire embryo, and when the base moves in the axial direction of the tire embryo, the position of the tablet winding mechanism can match the width direction of the tire embryo. Since the extruder unit is also installed on the base, the tire embryo can be kept in the winding and molding process. The spacing between the extruder unit and the sheeting winding mechanism is kept unchanged, and the distance between the extruder unit and the sheeting winding mechanism is shortened to the maximum extent to ensure that the film will not be stretched and deformed. At the same time, the sheeting winding mechanism is pivotally connected to the base, so that the sheeting winding mechanism can rotate alone to complete the winding operation of the film on the tire blank, effectively avoiding the problem that the turning radius of the extruder unit is too large when rotating with the sheeting winding mechanism, so that too much space is required for winding the tire blank. Therefore, compared with the related art, the present invention can make the extruder unit move synchronously with the sheeting winding mechanism during the tire tread winding process, avoiding the problem that the conveyed film is stretched, deformed or even broken due to the long distance between the two during the winding process, thereby affecting the winding accuracy and production continuity.

[0011] In some embodiments, the winding molding system further includes a rubber supply conveyor belt, which conveys rubber from the tail to the head, the head of the rubber supply conveyor belt is pivotally connected to the extruder unit and is used to supply rubber to the extruder unit, and the tail of the rubber supply conveyor belt is pivotally connected to the work site;

[0012] The head of the rubber supply conveyor belt can be extended and retracted relative to the tail along the conveying direction of the rubber supply conveyor belt to adjust the length of the rubber supply conveyor belt so that the head of the rubber supply conveyor belt moves with the extruder unit.

[0013] In some embodiments, the extruder unit includes an extruder body and an extruder head. The extruder body is pivotally connected to the head of the rubber supply conveyor belt and can receive and plasticize the rubber. The extruder head is connected to the extruder body and connected to the sheeting and winding mechanism. The extruder head can extrude the rubber into the rubber stick for output.

[0014] In some embodiments, the extruder unit also includes a driving member and a gear pump, wherein the driving member is drivingly connected to the gear pump and is used to drive the gear pump, and the extruder body is connected to the extruder head through the gear pump to pressurize the rubber and deliver it into the extruder head.

[0015] In some embodiments, at least one of the extruder body and the extruder head is detachably connected to the gear pump via a locking assembly.

[0016] In some embodiments, the locking assembly includes a locking flange and a pneumatic clamping ring, and either the extruder body or the extruder head is connected to the gear pump through the locking flange, and the pneumatic clamping ring is sleeved on the outer peripheral wall of the locking flange and is used to clamp the locking flange.

[0017] In some embodiments, the winding molding system further comprises a bracket and a floating roller, wherein the bracket is mounted on the extruder head, the floating roller is located on the conveying path of the glue stick and is movably connected to the bracket along the height direction, and the floating roller can reverse the direction of the glue stick between the extruder head and the tablet winding mechanism;

[0018] The floating roller has a first position and a second position, and the floating roller can be switched between the first position and the second position to adjust the length of the glue stick between the extruder head and the tablet winding mechanism.

[0019] In some embodiments, the glue stick is suitable for rolling contact with the bottom of the floating roller, the height of the floating roller in the first position is higher than the height in the second position, the glue stick can push the floating roller from the second position to the first position, the floating roller can switch from the first position to the second position under the action of its own gravity, and the rotation speed of the screw of the extruder body when the floating roller is in the first position is less than the rotation speed of the screw of the extruder body when the floating roller is in the second position.

[0020] In some embodiments, the floating roller is in rolling contact with the support.

[0021] In some embodiments, the winding molding system also includes a first roller and a second roller, and the first roller and the second roller can be pivotally mounted on the bracket and located on the conveying path of the glue stick, the first roller can change the direction of the glue stick between the extruder head and the floating roller, and the second roller can change the direction of the glue stick between the floating roller and the sheeting winding mechanism, and the first roller and the second roller are both suitable for rolling contact with the glue stick.

[0022] In some embodiments, there are a plurality of second rollers and the second rollers are arranged at intervals along the conveying direction of the glue stick.

[0023] In some embodiments, the winding forming system further includes a displacement sensor, which is mounted on the bracket and is used to detect the position of the floating roller in the height direction.

[0024] In some embodiments, the winding forming system further includes a width measuring sensor, which is mounted on the bracket and arranged adjacent to the second roller, and the width measuring sensor is used to detect the diameter of the glue stick.

[0025] In some embodiments, the winding system further includes a traction rope, a counterweight and a steering wheel, wherein the first end of the traction rope is connected to the floating roller, the second end of the traction rope is connected to the counterweight, the steering wheel is pivotally mounted on the bracket and arranged above each of the floating roller and the counterweight, and the steering wheel is located on the traction path of the traction rope and reverses the traction rope;

[0026] When the floating roller switches from the second position to the first position, the counterweight can work together with the glue stick to balance the gravity of the floating roller.

[0027] In some embodiments, the sheet winding mechanism includes a molding roller group, a pressure roller, a swivel support and a rotary drive. The molding roller group and the pressure roller can be pivotally mounted on the swivel support and the directions of the pivot axes of the two are consistent. The molding roller group is arranged adjacent to the outer peripheral wall of the pressure roller and is provided with a glue-passing channel. The glue-passing channel is connected with the second roller. The glue stick can enter the glue-passing channel and is pressed by the molding roller group into the film output. The film can be covered on the outer peripheral wall of the pressure roller. The swivel support is pivotally connected to the base and is connected to the rotary drive transmission to adjust the direction of the pivot axis of the pressure roller to be consistent with the direction of the pivot axis of the tire blank.

[0028] The outer peripheral wall of the pressure roller is suitable for rolling contact with the outer peripheral wall of the tire blank, so that the film is tightly wound around the tire blank.

[0029] In some embodiments, the sheet winding mechanism also includes a telescopic cylinder and a support, the cylinder body of the telescopic cylinder is installed on the rotary support, the piston rod of the telescopic cylinder is connected to the support, the support is movably connected to the rotary support, the molding roller group and the pressure roller are both installed on the rotary support through the support, and the telescopic cylinder can push and pull the support to extend or retract relative to the rotary support to adjust the distance between the outer peripheral wall of the pressure roller and the outer peripheral wall of the tire blank.

[0030] In some embodiments, the base includes a first platform, a second platform and a fixed frame arranged in sequence along the height direction, the extruder unit is installed on the first platform, the sheet winding mechanism is pivotally connected to the first platform, one of the first platform and the fixed frame is movably connected to the second platform along the radial direction of the tire blank, and the other is movably connected to the second platform along the axial direction of the tire blank, and the fixed frame is installed in the work site.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the structure of a tire tread winding and molding system according to an embodiment of the present invention.

[0033] Figure 2 It is a schematic diagram of the connection structure between the tire tread winding and molding system and the winding workstation according to an embodiment of the present invention.

[0034] Figure 3 It is a schematic diagram of the connection structure between an extruder body, an extruder head, a driving member and a gear pump in a tire tread winding molding system according to an embodiment of the present invention.

[0035] Figure 4 It is a schematic diagram of the main structure of the support and floating roller parts in the tire tread winding and molding system according to an embodiment of the present invention.

[0036] Figure 5 It is a schematic diagram of the top view of the structure of the support and floating roller parts in the tire tread winding and molding system according to an embodiment of the present invention.

[0037] Figure 6 Schematic diagram of the structure of a sheeting winding mechanism in a tire tread winding molding system according to an embodiment of the present invention.

[0038] Figure 7Schematic diagram of the structure of a base in a tire tread winding and molding system according to an embodiment of the present invention.

[0039] Figure numerals: 1. Extruder unit, 11. Extruder body, 12. Extruder head, 13. Driving part, 14. Gear pump, 15. Locking assembly, 151. Locking flange, 152. Pneumatic clamping ring, 2. Tablet winding mechanism, 21. Profile roller group, 22. Press roller, 23. Rotary support, 24. Support, 3. Base, 31. First platform, 32. Second platform, 33. Fixed frame, 4. Tire blank, 5. Rubber supply conveyor belt, 6. Bracket, 7. Floating roller, 71. First roller, 72. Second roller, 73. Counterweight, 74. Steering wheel, 8. Displacement sensor, 9. Width measuring sensor. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] like Figure 1 and Figure 2 As shown, a tire tread winding molding system according to an embodiment of the present invention includes an extruder unit 1, a sheeting winding mechanism 2 and a base 3. The extruder unit 1 is connected to the sheeting winding mechanism 2. The extruder unit 1 is used to plasticize the rubber material and supply rubber sticks to the sheeting winding mechanism 2. The sheeting winding mechanism 2 is used to roll the rubber stick into a film for output and wind the film around the tire blank 4. The extruder unit 1 is installed on the base 3. The sheeting winding mechanism 2 is pivotally connected to the base 3. The base 3 can move relative to the tire blank 4 along either the radial direction or the axial direction of the tire blank 4, that is, the base 3 can move relative to the tire blank 4 along the radial direction of the tire blank 4, and the base 3 can move relative to the tire blank 4 along the axial direction of the tire blank 4, so as to adjust the distance between the sheeting winding mechanism 2 and the tire blank 4, so that the extruder unit 1 and the sheeting winding mechanism 2 move synchronously.

[0042] It can be understood that according to the tire tread winding and molding system of the embodiment of the present invention, the extruder unit 1 and the tablet winding mechanism 2 are integrated on the same base 3 to form a tire tread winding and molding system with a compact overall structure, wherein, since the base 3 can move relative to the tire embryo 4 along the radial and axial directions of the tire embryo 4, when the film is wound on the tire embryo 4, the distance between the tablet winding mechanism 2 and the tire embryo 4 can be adjusted by changing the relative position between the base 3 and the tire embryo 4, so that when the base 3 moves along the radial direction of the tire embryo 4, the position of the tablet winding mechanism 2 matches the diameter change of the tire embryo 4, and when the base 3 moves along the axial direction of the tire embryo 4, the position of the tablet winding mechanism 2 can match the width direction of the tire embryo 4. Since the extruder unit 1 is also installed on the base 3, the tablet winding mechanism 2 can be adjusted at the tire embryo 4. During the winding process, the distance between the extruder unit 1 and the tableting winding mechanism 2 is kept unchanged, and the distance between the extruder unit 1 and the tableting winding mechanism 2 is shortened to the maximum extent to ensure that the film will not be stretched and deformed. At the same time, the tableting winding mechanism 2 is pivotally connected to the base 3, so that the tableting winding mechanism 2 can rotate alone to complete the winding operation of the film on the tire blank 4, and effectively avoid the problem that the turning radius of the extruder unit 1 is too large when rotating with the tableting winding mechanism 2, so that too much space is required to wind the tire blank 4. Therefore, compared with the related art, the present invention can make the extruder unit 1 move synchronously with the tableting winding mechanism 2 during the tire tread winding process, avoiding the problem that the conveyed film is stretched, deformed or even broken due to the long distance between the two during the winding process, thereby affecting the winding accuracy and production continuity.

[0043] Specifically, the radial direction of the embryo 4 can be the left-right direction in the figure. The axial direction of the embryo 4 can be the front-back direction in the figure. The extruder group 1 can be located on the right side of the tableting winding mechanism 2. Both the extruder group 1 and the tableting winding mechanism 2 can be located above the base 3. The width range of the calendered film in the present invention is 20 to 30 mm, wherein the width of the film can be, for example, 20 mm, 22 mm, 24 mm, 25 mm, 26 mm, 28 mm, 30 mm, etc., but is not limited to the listed values, and other values ​​not listed in the numerical range are also applicable; the thickness range of the calendered film in the present invention is 1 to 2 mm, wherein the thickness of the film can be, for example, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, etc., but is not limited to the listed values, and other values ​​not listed in the numerical range are also applicable.

[0044] It should be noted that the present invention is applicable to the molding of high-performance radial tires in an online or offline manner. The extruded rubber sheet in the present invention adopts the aforementioned size design, and the tread profile of the winding molding does not exceed the tread profile size range of the high-performance tire, and the width, thickness and weight accuracy of the tread profile of the winding molding also meet the process requirements of the high-performance tire.

[0045] like Figure 1and Figure 2 As shown, in some embodiments, the winding molding system also includes a rubber supply conveyor belt 5, which conveys rubber from the tail toward the head. The head of the rubber supply conveyor belt 5 is pivotally connected to the extrusion unit 1 and is used to supply rubber to the extrusion unit 1. The tail of the rubber supply conveyor belt 5 is pivotally connected to the work site.

[0046] The head of the rubber supply conveyor belt 5 can be extended and retracted relative to the tail along the conveying direction of the rubber supply conveyor belt 5 to adjust the length of the rubber supply conveyor belt 5 so that the head of the rubber supply conveyor belt 5 moves with the extruder unit 1 .

[0047] It can be understood that, by adopting the above-mentioned structural design, the head of the rubber supply conveyor belt 5 can follow the extrusion unit 1 to move along either the radial or axial direction of the tire blank 4, while the loading position of the tail of the rubber supply conveyor belt 5 will not change, thereby achieving continuous and stable rubber supply to the extrusion unit 1.

[0048] like Figure 3 As shown, in some embodiments, the extruder unit 1 includes an extruder body 11 and an extruder head 12. The extruder body 11 is pivotally connected to the head of the rubber supply conveyor belt 5 and can receive and plasticize the rubber. The extruder head 12 is connected to the extruder body 11 and connected to the sheeting and winding mechanism 2. The extruder head 12 can extrude the rubber into a rubber stick for output.

[0049] Specifically, the extruder body 11 may include a barrel, a screw and a driving assembly. The barrel has a receiving cavity and is provided with a feeding seat connected to the receiving cavity. The feeding seat is connected to the head of the rubber supply conveyor belt 5 so that the rubber to be plasticized is continuously supplied to the feeding seat by the rubber supply conveyor belt 5. The screw can be pivotally installed in the receiving cavity and is connected to the driving assembly so that the screw rotates to push the rubber to the extruder head 12, wherein the driving assembly may not be limited to including a motor and a reducer, and the motor is connected to the screw through the reducer. The head of the rubber supply conveyor belt 5 can be installed on the upper surface of the reducer through a column, and the tail of the rubber supply conveyor belt 5 can be installed on the ground of the workplace through a column, so that the rubber supply conveyor belt 5 can follow the extruder unit 1 to move in the front-to-back direction and the left-to-right direction by relying on the power of the base 3.

[0050] like Figure 3As shown, in some embodiments, the extruder unit 1 also includes a driving member 13 and a gear pump 14, the driving member 13 is connected to the gear pump 14 by transmission and is used to drive the gear pump 14, and the extruder body 11 is connected to the extruder head 12 through the gear pump 14 to pressurize and convey the rubber material into the extruder head 12. Among them, the gear pump 14 is arranged between the barrel and the extruder head 12, and the barrel can be connected to the extruder head 12 through the gear pump 14. The main function of the gear pump 14 is to pressurize the high-temperature rubber material conveyed by the extruder body 11 and extrude it from the extruder head 12 into a round rod-shaped rubber strip, i.e., a rubber stick. The driving member 13 may not be limited to a driving motor.

[0051] It can be understood that the extruder body 11 pushes the rubber material to the extruder head 12 through the rotational movement of the screw. Due to the influence of the rotation direction of the screw, the uneven annular gap between the screw and the inner wall of the accommodating cavity, or the unstable feeding, the rubber material pushed to the extruder head 12 will fluctuate, so that the size of the rubber stick extruded by the extruder head 12 changes, and finally the weight and contour accuracy of the wound product are low. Therefore, by adding a gear pump 14 between the barrel and the extruder head 12, the high-temperature rubber material from the extruder body 11 can be pressurized, so that the rubber material can be fed into the extruder head 12 at a stable flow rate after being stabilized by the gear pump 14, and then fed to the sheeting and winding mechanism 2, thereby greatly reducing the fluctuation of the extruded rubber stick, so as to greatly improve the weight and cross-sectional contour quality of the wound semi-finished product.

[0052] Preferably, the gear pump 14 is a volumetric gear pump 14, which uses a pair of externally meshing cylindrical gears to rotate relative to each other to convey high-viscosity rubber. Its main function is to significantly improve the stability of the rubber pressure and achieve a near-linear output of the rubber flow rate, so as to control the stability of the diameter of the rubber stick extruded by the extruder head 12 and reduce the size fluctuation of the final rubber stick.

[0053] like Figure 3 As shown, in some embodiments, at least one of the extruder body 11 and the extruder head 12 is detachably connected to the gear pump 14 via a locking assembly 15 .

[0054] Specifically, the barrel is detachably connected to the gear pump 14 via a locking assembly 15; alternatively, the extruder head 12 is detachably connected to the gear pump 14 via a locking assembly 15; alternatively, both the barrel and the extruder head 12 are detachably connected to the gear pump 14 via a locking assembly 15.

[0055] It can be understood that any two adjacent ones of the extruder body 11 (ie, the barrel), the gear pump 14 and the extruder head 12 can be detachably connected to facilitate subsequent disassembly and maintenance.

[0056] like Figure 3As shown, in some embodiments, the locking assembly 15 includes a locking flange 151 and a pneumatic clamping ring 152. Any one of the extruder body 11 and the extruder head 12 is connected to the gear pump 14 through the locking flange 151. The pneumatic clamping ring 152 is sleeved on the outer peripheral wall of the locking flange 151 and is used to clamp the locking flange 151, so that when the tire tread winding molding system is working, the pneumatic clamping ring 152 clamps the locking flange 151, so that the gear pump 14 and the barrel, or the gear pump 14 and the extruder head 12 are tightly combined to prevent glue leakage. When the rubber needs to be replaced, the pneumatic clamping ring 152 can be loosened and the locking flange 151 can be manually rotated to facilitate the cleaning of the remaining rubber between the gear pump 14 and the barrel, or between the gear pump 14 and the extruder head 12.

[0057] Specifically, the barrel is connected to the gear pump 14 through the locking flange 151; or, the extruder head 12 is connected to the gear pump 14 through the locking flange 151; or, both the barrel and the extruder head 12 are connected to the gear pump 14 through the locking flange 151. The locking flange 151 between the gear pump 14 and the barrel corresponds to the locking flange 151 on the right side of the figure. The locking flange 151 between the gear pump 14 and the extruder head 12 corresponds to the locking flange 151 on the left side of the figure.

[0058] like Figure 4 and Figure 5 As shown, in some embodiments, the winding molding system also includes a bracket 6 and a floating roller 7. The bracket 6 is installed on the extruder head 12. The floating roller 7 is located on the conveying path of the glue stick and is movably connected to the bracket 6 along the height direction. The floating roller 7 can change the direction of the glue stick between the extruder head 12 and the tableting winding mechanism 2.

[0059] The floating roller 7 has a first position and a second position, and the floating roller 7 can be switched between the first position and the second position to adjust the length of the glue stick between the extruder head 12 and the tablet winding mechanism 2 .

[0060] It can be understood that by adjusting the position of the floating roller 7 between the extruder head 12 and the tableting winding mechanism 2 along the height direction, the length of the glue stick stored between the extruder head 12 and the tableting winding mechanism 2 can be changed to adapt to the glue stick output of the winding molding system during operation, thereby achieving smooth transportation of the glue stick between the extruder head 12 and the tableting winding mechanism 2, further ensuring the stability of the dimensional accuracy of the extruded glue stick and avoiding the glue stick from being stretched and deformed.

[0061] Specifically, the height direction may be the up-down direction in the figure. The bracket 6 may extend along the up-down direction.

[0062] like Figure 4 and Figure 5As shown, in some embodiments, the glue stick is suitable for rolling contact with the bottom of the floating roller 7, the height of the floating roller 7 in the first position is higher than the height in the second position, the glue stick can push the floating roller 7 from the second position to the first position, the floating roller 7 can switch from the first position to the second position under the action of its own gravity, and the speed of the screw of the extruder body 11 when the floating roller 7 is in the first position is lower than the speed of the screw of the extruder body 11 when the floating roller 7 is in the second position. Among them, the floating roller 7 can slide along the front surface of the bracket 6 in the figure.

[0063] It can be understood that the glue stick is designed to be in rolling contact with the bottom of the floating roller 7 to reverse the direction of the glue stick. The traction force during the glue stick conveying process and the gravity of the floating roller 7 itself can be used to flexibly adjust the position of the floating roller 7 based on the rotation speed of the screw. When the floating roller 7 is in a higher position, the rotation speed of the screw is increased to increase the number of extruded glue sticks, so as to guide the floating roller 7 to descend under the traction of the floating roller 7's own gravity. When the floating roller 7 is in a lower position, the rotation speed of the screw is reduced to reduce the number of extruded glue sticks, so as to guide the floating roller 7 to rise under the action of the traction force of the glue stick, thereby cooperating with the tableting winding mechanism 2 to ensure that the floating roller 7 is in a suitable position and the gravity acting on the glue stick is constant, thereby maintaining the stability of the diameter of the extruded glue stick.

[0064] Furthermore, the floating roller 7 and the bracket 6 are in rolling contact to greatly reduce the friction between the two, ensuring that the stretching of the rubber stick is within the allowable range, and compared with the linear guide structure between the floating roller 7 and the bracket 6 in the related art, the sliding friction coefficient of the floating roller 7 is reduced. For example, the floating roller 7 can be made to roll up and down on the surface of the bracket 6 through a rolling bearing.

[0065] like Figure 4 and Figure 5 As shown, in some embodiments, the winding molding system further includes a first roller 71 and a second roller 72, both of which are pivotally mounted on the bracket 6 and are located on the conveying path of the glue stick, the first roller 71 can change the direction of the glue stick between the extruder head 12 and the floating roller 7, and the second roller 72 can change the direction of the glue stick between the floating roller 7 and the tablet winding mechanism 2, and the first roller 71 and the second roller 72 are both suitable for rolling contact with the glue stick. For example, the glue stick output from the extruder head 12 can pass through the upper surface of the first roller 71, then pass through the bottom of the floating roller 7, and then be conveyed to the upper surface of the second roller 72, and finally enter the tablet winding mechanism 2.

[0066] It can be understood that the first roller 71 and the second roller 72 cooperate with the floating roller 7 to further ensure the smooth transportation of the glue stick between the extruder head 12 and the tableting and winding mechanism 2.

[0067] Specifically, the first roller 71 corresponds to the U-shaped roller on the right side of the figure. The second roller 72 corresponds to the U-shaped roller on the left side of the figure. The direction of the pivot axis of the first roller 71, the direction of the pivot axis of the second roller 72 and the direction of the pivot axis of the floating roller 7 are all consistent.

[0068] Furthermore, there are multiple second rollers 72 and they are arranged at intervals along the conveying direction of the glue stick, so that the multiple second rollers 72 can jointly ensure stable support and conveying of the glue stick thereon. In addition, according to actual conditions, the second rollers 72 at appropriate positions can be selected to connect with the floating roller 7, so that the glue stick after the floating roller 7 is reversed passes through the second rollers 72 at appropriate positions and then reverses to enter the sheeting winding mechanism 2.

[0069] like Figure 4 As shown, in some embodiments, the winding forming system further includes a displacement sensor 8, which is mounted on the bracket 6 and is used to detect the height position of the floating roller 7. The displacement sensor 8 is not limited to a linear displacement sensor 8.

[0070] like Figure 4 As shown, in some embodiments, the winding forming system further includes a width sensor 9, which is mounted on the bracket 6 and arranged adjacent to the second roller 72, and is used to detect the diameter of the glue stick.

[0071] It can be understood that the data information detected by the displacement sensor 8 and the width sensor 9 can be fed back to the host computer of the winding molding system, so that the host computer can automatically control the screw speed according to the detection information, adjust the glue stick extrusion amount of the extruder head 12, and ensure the dimensional stability of the glue stick when it enters the tableting winding mechanism 2.

[0072] like Figure 4 and Figure 5 As shown, in some embodiments, the winding forming system also includes a traction rope (not shown in the figure), a counterweight 73 and a steering wheel 74, the first end of the traction rope is connected to the floating roller 7, the second end of the traction rope is connected to the counterweight 73, the steering wheel 74 is pivotally mounted on the bracket 6 and arranged above each of the floating roller 7 and the counterweight 73, the steering wheel 74 is located on the traction path of the traction rope and changes the direction of the traction rope.

[0073] When the floating roller 7 switches from the second position to the first position, the counterweight 73 can work together with the glue stick to balance the gravity of the floating roller 7 itself.

[0074] It is understandable that the traction force required for adjusting the position of the floating roller 7 by the rubber stick can be reduced by cooperating with the traction rope, the counterweight 73 and the steering wheel 74, ensuring that the floating roller 7 can move flexibly up and down under the action of the rubber stick and its own gravity.

[0075] Specifically, the traction rope may not be limited to a steel wire rope. The floating roller 7 may be located at the front side of the bracket 6. The counterweight 73 may be located at the rear side of the bracket 6. The pulley may be located above the bracket 6.

[0076] like Figure 6 As shown, in some embodiments, the sheet winding mechanism 2 includes a profile roller group 21, a pressure roller 22, a slewing support 23 and a rotary drive (not shown in the figure). The profile roller group 21 and the pressure roller 22 can be pivotally mounted on the slewing support 23 and the directions of the pivot axes of the two are consistent. The profile roller group 21 is arranged adjacent to the outer peripheral wall of the pressure roller 22 and is provided with a glue-passing channel, which is connected to the second roller 72. The glue stick can enter the glue-passing channel and be pressed into a film by the profile roller group 21 for output. The film can be coated on the outer peripheral wall of the pressure roller 22. The slewing support 23 is pivotally connected to the base 3 and is connected to the rotary drive transmission to adjust the direction of the pivot axis of the pressure roller 22 to be consistent with the direction of the pivot axis of the tire blank 4.

[0077] The outer peripheral wall of the pressing roller 22 is suitable for rolling contact with the outer peripheral wall of the tire blank 4 so that the film is pressed and wound around the tire blank 4.

[0078] It can be understood that, through the above-mentioned sheeting winding mechanism 2, the rubber stick extruded from the extruder head 12 can be transported to the embossing roller group 21 through the second roller 72 to extrude a circular arc-shaped thin film, and then the film is transported to the pressure roller 22 below the embossing roller group 21. Since the embossing roller group 21 and the pressure roller 22 can rotate relative to the tire blank 4 along with the rotary support 23 to achieve the individual adjustment of the angle between the pressure roller 22 and the tire blank 4, it is possible to ensure that the upper surface of the pressure roller 22 is tightly pressed against the tire blank 4 with the cooperation of the base 3 and the rotary drive, and the film is spirally wound onto the tire blank 4 to form a tread with a contour that meets the process requirements.

[0079] Specifically, the profiling roller set 21 may be located above and to the side of the row roller 22. The profiling roller set 21 may include two profiling rollers, which are arranged adjacent to each other and define a glue passage between their outer peripheral walls. The profiling roller set 21 may be driven to rotate automatically by a driving member, so that when the diameter of the glue stick is greater than a set diameter, the driving member may speed up the rotation speed of the profiling roller set 21 to stretch the glue stick to reduce its diameter; and when the diameter of the glue stick is less than the set diameter, the driving member may slow down the rotation speed of the profiling roller set 21 to compress the glue stick to increase its diameter, thereby maintaining the stability of the diameter of the extruded glue stick.

[0080] like Figure 6As shown, in some embodiments, the sheet winding mechanism 2 also includes a telescopic cylinder (not shown in the figure) and a support 24, the cylinder body of the telescopic cylinder is installed on the rotary support 23, the piston rod of the telescopic cylinder is connected to the support 24, the support 24 is movably connected to the rotary support 23, the embossing roller group 21 and the pressure roller 22 are both installed on the rotary support 23 through the support 24, the telescopic cylinder can push and pull the support 24 to extend or retract relative to the rotary support 23 to adjust the distance between the outer peripheral wall of the pressure roller 22 and the outer peripheral wall of the tire blank 4, change the clamping force between the two, adapt to the change of tread thickness, and ensure that the film is compacted on the tire blank 4.

[0081] Specifically, the telescopic cylinder may be not limited to one of a pneumatic cylinder, a hydraulic cylinder, an electric cylinder and an oil cylinder. The support 24 may be located above the slewing support 23. To further ensure the smooth sliding of the support 24 on the slewing support 23, a sliding guide rail may also be arranged between the two.

[0082] like Figure 7 As shown, in some embodiments, the base 3 includes a first platform 31, a second platform 32 and a fixed frame 33 arranged in sequence along the height direction, the extruder unit 1 is installed on the first platform 31, the tablet winding mechanism 2 is pivotally connected to the first platform 31, one of the first platform 31 and the fixed frame 33 is movably connected to the second platform 32 along the radial direction of the tire blank 4, and the other is movably connected to the second platform 32 along the axial direction of the tire blank 4, and the fixed frame 33 is installed in the workplace.

[0083] Specifically, the first platform 31, the second platform 32 and the fixing frame 33 can be arranged in sequence from top to bottom. The fixing frame 33 can be fixed on the ground of the work site by screws. The first platform 31 and the second platform 32, as well as the second platform 32 and the fixing frame 33 can realize linear sliding movement between the two by a ball screw structure. The ball screw structure can be electrically connected to the upper computer to control the moving speed of the first platform 31 and the second platform 32.

[0084] It should be noted that by adopting the tire tread winding molding system described in the present invention to replace the tread product extrusion production line system required for high-performance tire tread bonding molding, the production cost of high-performance tires is reduced, and the production of high-performance tires in multiple specifications and small batches can be flexibly realized, while avoiding the tread lap joint fracture defect existing in tread bonding molding. The tire tread winding molding system described in the present invention avoids the various problems existing when directly applying the large-size tire tread winding molding system to high-performance tires. At the same time, the technical accuracy of large-size tire tread winding is greatly improved. The main technical parameters are compared as shown in Table 1 below:

[0085] Table 1 Comparison of technical parameters of winding tread

[0086] Technical parameters of winding tread Large size tire tread winding molding High-performance tire tread winding molding Wrapping tread weight accuracy ±1.5％ ±0.5％ Winding tread width accuracy ±5mm ±2mm Winding tread thickness accuracy ±1.5mm ±0.5mm Accuracy of symmetric points of winding tread ≤3mm ≤1mm

[0087] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0088] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0091] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0092] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A tire tread winding and molding system, characterized in that: include: An extruder unit and a sheeting and winding mechanism, wherein the extruder unit is connected to the sheeting and winding mechanism, the extruder unit is used to plasticize the rubber material and supply rubber sticks to the sheeting and winding mechanism, and the sheeting and winding mechanism is used to calender the rubber sticks into films for output and wind the films on the tire blank; as well as A base, the extruder unit is installed on the base, the sheeting winding mechanism is pivotally connected to the base, and the base can move relative to the tire blank along any one of the radial and axial directions of the tire blank so as to adjust the distance between the sheeting winding mechanism and the tire blank, so that the extruder unit and the sheeting winding mechanism move synchronously.

2. The tire tread winding and molding system according to claim 1, characterized in that: It also includes a rubber supply conveyor belt, which conveys rubber from the tail to the head, the head of the rubber supply conveyor belt is pivotally connected to the extruder unit and is used to supply rubber to the extruder unit, and the tail of the rubber supply conveyor belt is pivotally connected to the work site; The head of the rubber supply conveyor belt can be extended and retracted relative to the tail along the conveying direction of the rubber supply conveyor belt to adjust the length of the rubber supply conveyor belt so that the head of the rubber supply conveyor belt moves with the extruder unit.

3. The tire tread winding and molding system according to claim 1, characterized in that: The extruder unit comprises: An extruder body and an extruder head, wherein the extruder body is pivotally connected to the head of the rubber supply conveyor belt and is capable of receiving and plasticizing the rubber material, the extruder head is connected to the extruder body and is connected to the tablet winding mechanism, and the extruder head is capable of extruding the rubber material into the rubber stick for output; and / or A driving member and a gear pump, wherein the driving member is drivingly connected to the gear pump and is used to drive the gear pump, and the extruder body is connected to the extruder head through the gear pump to pressurize and convey the rubber material into the extruder head.

4. The tire tread winding and molding system according to claim 3, characterized in that: At least one of the extruder body and the extruder head is detachably connected to the gear pump via a locking assembly; And / or, the locking assembly includes a locking flange and a pneumatic clamping ring, and any one of the extruder body and the extruder head is connected to the gear pump through the locking flange, and the pneumatic clamping ring is sleeved on the outer peripheral wall of the locking flange and is used to clamp the locking flange.

5. The tire tread winding and molding system according to claim 3, characterized in that: It also includes a bracket and a floating roller, wherein the bracket is mounted on the extruder head, the floating roller is located on the conveying path of the glue stick and is movably connected to the bracket along the height direction, and the floating roller can change the direction of the glue stick between the extruder head and the tablet winding mechanism; The floating roller has a first position and a second position, and the floating roller can be switched between the first position and the second position to adjust the length of the glue stick between the extruder head and the tablet winding mechanism.

6. The tire tread winding and molding system according to claim 5, characterized in that: The glue stick is suitable for rolling contact with the bottom of the floating roller, the height of the floating roller in the first position is higher than that in the second position, the glue stick can push the floating roller from the second position to the first position, the floating roller can switch from the first position to the second position under the action of its own gravity, and the rotation speed of the screw of the extruder body when the floating roller is in the first position is lower than the rotation speed of the screw of the extruder body when the floating roller is in the second position; And / or, the floating roller is in rolling contact with the support.

7. The tire tread winding and molding system according to claim 5, characterized in that: It also includes a first roller and a second roller, the first roller and the second roller are both pivotally mounted on the bracket and located on the conveying path of the glue stick, the first roller can change the direction of the glue stick between the extruder head and the floating roller, the second roller can change the direction of the glue stick between the floating roller and the tablet winding mechanism, and the first roller and the second roller are both suitable for rolling contact with the glue stick; And / or, there are a plurality of second rollers and they are arranged at intervals along the conveying direction of the glue stick.

8. The tire tread winding and molding system according to claim 7, characterized in that: Also includes: A displacement sensor, the displacement sensor is mounted on the bracket, and the displacement sensor is used to detect the position of the floating roller in the height direction; and / or A width measuring sensor is installed on the bracket and arranged adjacent to the second roller, and is used to detect the diameter of the glue stick.

9. The tire tread winding and molding system according to any one of claims 5 to 8, characterized in that: It also includes a traction rope, a counterweight and a steering wheel, wherein the first end of the traction rope is connected to the floating roller, the second end of the traction rope is connected to the counterweight, the steering wheel is pivotally mounted on the bracket and arranged above each of the floating roller and the counterweight, the steering wheel is located on the traction path of the traction rope and reverses the traction rope; When the floating roller switches from the second position to the first position, the counterweight can work together with the glue stick to balance the gravity of the floating roller.

10. The tire tread winding and molding system according to claim 9, characterized in that: The base includes a first platform, a second platform and a fixed frame arranged in sequence along the height direction, the extruder unit is installed on the first platform, the tablet winding mechanism is pivotally connected to the first platform, one of the first platform and the fixed frame is movably connected to the second platform along the radial direction of the tire blank, and the other is movably connected to the second platform along the axial direction of the tire blank, and the fixed frame is installed in the work site.

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