Tire forming method and mechanical drum

Abstract

The present application provides a tire forming method and a mechanical drum. The tire forming method includes step S1 of controlling a bonding mechanism to press a bead filler and bond the bead filler to a tire blank of a tire, and step S2 of controlling a turn-up mechanism to press a sidewall and bond the sidewall to the tire blank while bonding the bead filler or in the process of bonding the bead filler. The tire forming method of the present application solves the problems of the prior art that the tire forming time is long and the forming efficiency is low.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims priority to a Chinese patent application filed with the China National Intellectual Property Administration on June 17, 2022, with application number 202210690246.0 and application title "Tire Molding Method and Mechanical Drum", the entire content of which is incorporated herein by reference.

[0002] This application relates to the technical field of rubber tires, and specifically to tire molding methods and mechanical drums.

Background Art

[0003] When turning up and molding an existing tire, mainly a mechanical drum and a bladder drum are separated by bonding the sidewall of the tire. When the bladder drum turns up the sidewall of the tire, by inflating the bladder and bonding the sidewall to the side of the tire blank of the tire, the problem of indentation on the side of the tire can be avoided. However, the bladder drum has problems such as complicated bladder replacement, high bladder cost, and worse molding quality of the tire bead than that of the mechanical drum. Therefore, the rejection rate of tires is high and the cost is still high.

[0004] In the case of a mechanical drum, the cost is low, but the existing tire molding process includes a bead filler bonding process, a bead attachment process, a turn - up process, etc., which are restricted by the current structure of the mechanical drum. Therefore, in the molding process, each process needs to be executed sequentially. For example, the current turn - up process needs to wait until the bead filler is completely bonded to the tread before execution, otherwise the operations between processes will interfere. As a result, the entire molding process takes a long time, the manufacturing efficiency is low, and it is not applicable to rapid mass production.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The main object of this application is to provide a tire forming method and a mechanical drum in order to solve the problems of the prior art that the tire forming time is long and the forming efficiency is low.

Means for Solving the Problem

[0006] To achieve the above object, according to one aspect of this application, a tire forming method is provided. The tire forming method includes step S1 of controlling a bonding mechanism to roll a bead filler and bond the bead filler to a tire blank of a tire, and step S2 of controlling a turn-up mechanism to roll a sidewall and bond the sidewall to the tire blank while bonding the bead filler or in the process of bonding the bead filler.

[0007] In one embodiment, the tire forming method further includes step S3 after executing step S1. In step S3, in the process of the turn-up mechanism rolling the sidewall or after executing step S2, the bonding mechanism is controlled to roll the sidewall and bond the sidewall to the tire blank. The turn-up mechanism and the bonding mechanism roll different positions of the sidewall respectively.

[0008] In one embodiment, when executing step S3, two suspension arms on the bonding mechanism are symmetrically provided and roll the sidewalls on both sides of the tire simultaneously.

[0009] In one embodiment, when executing step S2, a screw assembly is driven by a motor to rotate to move a rolling roller assembly on the turn-up mechanism in the radial direction of the tire.

[0010] In one embodiment, when executing step S2, in order that the rolling roller assembly always abuts against the sidewall during movement, a limiting cylinder is used to drive the rolling roller assembly to press the sidewall of the tire.

[0011] In one embodiment, when performing step S2, a plurality of first turn-up structures of the turn-up mechanism are provided on the same side of the tire and arranged in the circumferential direction of the tire, and the screw assembly is connected to the plurality of first turn-up structures to drive each of the first turn-up structures to move in the radial direction of the tire to roll the sidewall.

[0012] In one embodiment, when performing step S2, a plurality of second turn-up structures of the turn-up mechanism are all provided on the side opposite to the first turn-up structure, arranged along the circumferential direction of the tire, and the screw assembly is connected to the plurality of second turn-up structures to drive each of the second turn-up structures to move in the radial direction of the tire to roll the sidewall.

[0013] According to another aspect of the present application, a mechanical drum for implementing the above tire forming method is provided. The mechanical drum includes a spindle assembly rotatably provided for moving and rotating the tire, a turn-up mechanism provided on the spindle assembly for rolling the sidewall, a screw assembly provided through the spindle assembly and drivingly connected to the turn-up mechanism for driving the turn-up mechanism to move, and a bonding mechanism movably provided relative to the spindle assembly for bonding the bead filler and / or the sidewall to the tire blank of the tire.

[0014] In one embodiment, the turn-up mechanism includes a plurality of first turn-up structures provided in the circumferential direction of the spindle assembly, the screw assembly is drivingly connected to each of the first turn-up structures to drive each of the first turn-up structures to move simultaneously in the radial direction of the tire, and the turn-up mechanism further includes a plurality of limiting cylinders provided in a one-to-one manner and connected to the plurality of first turn-up structures for driving each of the first turn-up structures to press the tire.

[0015] In one embodiment, the turning-up mechanism further includes a slide sleeve assembly that is fitted outside the spindle assembly and is provided to be axially movable relative to the spindle assembly. A plurality of first turning-up structures are provided around the slide sleeve assembly. The screw assembly is drivingly connected to the slide sleeve assembly through a screw nut provided through the spindle assembly to move each of the first turning-up structures.

[0016] In one embodiment, the first turning-up structure further includes a rolling roller assembly for rolling the sidewall of the tire and a first drive rod assembly drivingly connected to the rolling roller assembly. The screw assembly is connected to the first drive rod assembly to drive the rolling roller assembly by the first drive rod assembly to move in the radial direction of the tire.

[0017] In one embodiment, the first turning-up structure further includes a second drive rod assembly rotatably connected to the first drive rod assembly and a limiting cylinder connected to the second drive rod assembly for pressing the tire by driving the rolling roller assembly by the first drive rod assembly.

[0018] In one embodiment, the turning-up mechanism further includes a slide sleeve assembly provided to be axially movable relative to the spindle assembly. The first drive rod assembly includes a third drive rod and a fourth drive rod. The third drive rod and the fourth drive rod are respectively rotatably connected to the slide sleeve assembly. The first turning-up structure is connected to the first drive rod assembly and further includes a support assembly for supporting the sidewall outside the turning-up mechanism. The third drive rod, the support assembly, the fourth drive rod and the slide sleeve assembly are sequentially connected to form a four-bar linkage mechanism.

[0019] In one embodiment, the turn-up mechanism further includes a plurality of second turn-up structures that are arranged symmetrically with respect to the spindle assembly in a one-to-one correspondence with the plurality of first turn-up structures, and the screw assemblies are each drivingly connected to a respective second turn-up structure to simultaneously drive each second turn-up structure to move in the radial direction of the tire.

[0020] In the tire molding method applying the technical solution of the present application, by performing part of the operations of the turn-up process and the bead filler bonding process simultaneously, the molding time of the entire tire is shortened, and at the same time, the interference between the operations of the two processes is avoided. For this purpose, the following mechanical drum improves the structure to meet the specific need that part of the operations of the two processes are performed simultaneously. The above tire molding method includes a step S1 of controlling the bonding mechanism to roll the bead filler and bond the bead filler to the tire blank of the tire, and a step S2 of controlling the turn-up mechanism to roll the sidewall and bond the sidewall to the tire blank while bonding the bead filler or in the process of bonding the bead filler. By performing the above-described turn-up mechanism and bead filler bonding operation simultaneously, the production efficiency is improved.

Brief Description of the Drawings

[0021] The accompanying drawings of the specification constituting a part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and their descriptions of the present application are for interpreting the present application, but do not constitute an inappropriate limitation to the present application. The accompanying drawings are as follows.

[0022]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0023] It should be noted that, in the case of no collision, the embodiments of the present application and the features in the embodiments may be combined with each other. Hereinafter, the present application will be described in detail in combination with the embodiments with reference to the drawings.

[0024] In order to solve the problem of the related art that the tire forming time is long and the forming efficiency is low, the present application provides a tire forming method and a mechanical drum.

[0025] Referring to FIGS. 1 to 2, the present application shortens the forming time of the whole tire by simultaneously executing a part of the operations of the turn-up process and the bead filler bonding process, and at the same time, avoids the interference of the operations between the two processes. For this purpose, the following mechanical drum improves the structure to provide a tire forming method that meets the need that a part of the operations of the two processes are performed simultaneously. Specifically, the above tire forming method includes step S1 of controlling the bonding mechanism 70 to roll and bond the bead filler to the tire blank of the tire, and step S2 of controlling the turn-up mechanism to roll and bond the sidewall to the tire blank while bonding the bead filler or in the process of bonding the bead filler. By performing the above turn-up process and bead filler bonding process simultaneously, the manufacturing efficiency is improved.

[0026] For implementation in combination with the above method, the present application provides a specific mechanical drum structure. The mechanical drum includes a spindle assembly 10, a turn-up mechanism, a screw assembly 30, and a bonding mechanism 70. The spindle assembly 10 employs a hollow shaft and can move and rotate the tire blank of the tire together with the turn-up mechanism. The turn-up mechanism is fitted outside the spindle assembly 10, and the screw assembly 30 is provided through the spindle assembly 10 and is drivingly connected to the turn-up mechanism to drive the turn-up mechanism to move. The bonding mechanism 70 is located on one side of the spindle assembly 10 and can move closer to or away from the spindle assembly 10 to bond the bead filler and / or the sidewall to the tire blank of the tire.

[0027] The tire forming method further includes step S3 after executing step S1. In step S3, when the turn-up mechanism rolls the sidewall or after executing step S2, the bonding mechanism 70 is controlled to roll the sidewall and bond the sidewall to the tire blank. The turn-up mechanism and the bonding mechanism 70 roll different positions of the sidewall respectively. Here, the turn-up mechanism is fitted in the spindle assembly 10 and is located on one side of the tire, and rolls the sidewall at the end close to the center of the tire, and the bonding mechanism 70 is provided on the outside along the radial direction of the tire and rolls the sidewall at the end close to the tread of the tire.

[0028] Specifically, the turn-up mechanism includes a plurality of first turn-up structures 20 and a plurality of limiting cylinders 40. The plurality of first turn-up structures 20 are provided in the circumferential direction of the spindle assembly 10, and the screw assemblies 30 are respectively drivingly connected to each first turn-up structure 20 to drive each first turn-up structure 20 to move simultaneously in the radial direction of the tire. The plurality of limiting cylinders 40 are provided and connected to the plurality of first turn-up structures 20 in a one-to-one manner, driving each first turn-up structure 20 to press the tire, and through the cooperation of the limiting cylinder 40 and the screw assembly 30, the function of the turn-up mechanism for rolling the sidewall along the radial direction of the tire blank is realized.

[0029] In order to achieve the purpose that the bonding mechanism 70 can simultaneously roll the sidewalls on both sides of the tire, two suspension arms are symmetrically provided on the bonding mechanism 70. The two suspension arms are driven by the same driving mechanism and can move closer to or away from each other simultaneously. When the bonding mechanism 70 rolls the side of the tire, the two suspension arms move closer to each other to press the sidewall against the side of the tire blank, thereby simultaneously rolling the sidewalls on both sides of the tire respectively.

[0030] When performing step S2, the motor drives the screw assembly 30 to rotate, so as to move the rolling roller assembly 21 on the turn-up mechanism in the radial direction of the tire.

[0031] When executing step S2, in order for the rolling roller assembly 21 to always contact the sidewall during movement, the limiting cylinder 40 drives the rolling roller assembly 21 to press the sidewall of the tire. In the existing tire forming process, due to the limitations of the turn-up drive form in terms of structure and layout, when the bonding mechanism 70 rolls the bead filler, it interferes with the operation of the turn-up mechanism. Therefore, there is a problem that it cannot meet the requirement that the rolling of the bead filler and the operation of the turn-up mechanism are carried out simultaneously. In order to implement and combine with this method, the present application provides a screw assembly inside the main shaft assembly, and by moving the first turn-up structure 20 and the second turn-up structure 60 simultaneously by the screw assembly and moving them towards each other, the rolling roller assembly 21 is moved in the radial direction of the tire. At the same time, a limiting cylinder is provided on the main shaft assembly and drivingly connected to the rolling roller assembly, so as to press and move the rolling roller assembly 21 against the sidewall. To realize the above operations, a rolling roller assembly 21 and a first drive rod assembly 22 are also provided on the first turn-up structure 20 of the present application. The rolling roller assembly 21 is used to roll the sidewall of the tire, and the first drive rod assembly 22 is drivingly connected to the rolling roller assembly 21. The screw assembly 30 is connected to the first drive rod assembly 22 and moves the rolling roller assembly 21 in the radial direction of the tire by the first drive rod assembly 22. In the above operation process, the screw assembly 30 moves one end of the first drive rod assembly 22 by the slide sleeve assembly 50 and slides it in the axial direction of the main shaft assembly 10. The other end of the first drive rod assembly 22 swings relative to this end, so that the rolling roller assembly 21 rolls along the contour of the side surface of the tire blank.

[0032] When executing step S2, the plurality of first turn-up structures 20 of the turn-up mechanism are provided on the same side of the tire and arranged in the circumferential direction of the tire. The screw assembly 30 is connected to the plurality of first turn-up structures 20 and drives each of the first turn-up structures 20 simultaneously to move in the radial direction of the tire to roll-press the sidewall.

[0033] When executing step S2, the plurality of second turn-up structures 60 of the turn-up mechanism are all provided on the side opposite to the first turn-up structure 20 and arranged along the circumferential direction of the tire. The screw assembly 30 is connected to the plurality of second turn-up structures 60 and drives each of the second turn-up structures 60 simultaneously to move in the radial direction of the tire to roll-press the sidewall.

[0034] The plurality of first turn-up structures 20 form a first annular structure, and the plurality of second turn-up structures 60 form a second annular structure. The first annular structure and the second annular structure are respectively fitted into the main shaft assembly 10 and located on both sides of the tire blank, and the sidewalls on both sides are respectively bonded to the side surfaces of the tire blank.

[0035] The above screw assembly 30 is provided within the main shaft assembly 10, while both the first turn-up structure 20 and the second turn-up structure 60 are located outside the main shaft assembly 10, realizing the driving connection between the screw assembly 30, the first turn-up structure 20, and the second turn-up structure 60. For this purpose, in the present application, a strip groove extending in the axial direction thereof is opened in the main shaft assembly 10, and the slide sleeve assembly 50 is fitted outside the main shaft assembly 10 and provided so as to be movable in the axial direction of the main shaft assembly 10. Here, a plurality of first turn-up structures 20 are provided around the slide sleeve assembly 50, and the screw assembly 30 is drivingly connected to the slide sleeve assembly 50 via a screw nut 25 provided through the main shaft assembly 10 to move each first turn-up structure 20. Here, the screw nut 25 is provided through the strip groove, and the screw nut 25 is connected to the screw assembly 30 and the slide sleeve assembly 50.

[0036] The first turn-up structure 20 further includes a second drive rod assembly 23 rotatably connected to the first drive rod assembly 22, and a limiting cylinder 40 connected to the second drive rod assembly 23 for driving the rolling roller assembly 21 by the first drive rod assembly 22 to press the tire.

[0037] The turning-up mechanism further includes a slide sleeve assembly 50 movably provided in the axial direction of the main shaft assembly 10. The first drive rod assembly 22 includes a third drive rod 221 and a fourth drive rod 222, and the third drive rod 221 and the fourth drive rod 222 are respectively rotatably connected to the slide sleeve assembly 50. The first turning-up structure 20 is connected to the first drive rod assembly 22 and further includes a support assembly 24 for supporting the side wall outside the turning-up mechanism. The third drive rod 221, the support assembly 24, the fourth drive rod 222 and the slide sleeve assembly 50 are sequentially connected to form a four-bar linkage mechanism. By providing the above linkage mechanism, the connection between the first drive assembly and the second drive assembly and the rolling roller assembly 21 is realized.

Explanation of Reference Numerals

[0038] 10 Main shaft assembly 20 First turning-up structure 21 Rolling roller assembly 22 First drive rod assembly 221 Third drive rod 222 Fourth drive rod 23 Second drive rod assembly 24 Support assembly 25 Screw nut 30 Screw assembly 40 Limit cylinder 50 Slide sleeve assembly 60 Second turning-up structure 70 Laminating mechanism

Claims

1. A tire molding method, comprising: a step S1 of controlling a bonding mechanism (70) to roll a bead filler and bond the bead filler to a tire blank of a tire; a step S2 of controlling a turn-up mechanism to roll a sidewall and bond the sidewall to the tire blank while bonding the bead filler or in a process of bonding the bead filler. The tire molding method is characterized by including the above steps.

2. The tire molding method further includes a step S3 after executing the step S1. In the step S3, in a process where the turn-up mechanism rolls the sidewall or after executing the step S2, the bonding mechanism (70) is controlled to roll the sidewall and bond the sidewall to the tire blank. The turn-up mechanism and the bonding mechanism (70) respectively roll different positions of the sidewall. The tire molding method according to claim 1 is characterized by the above.

3. When executing the step S3, two suspension arms on the bonding mechanism (70) are symmetrically provided and simultaneously roll the sidewalls on both sides of the tire respectively. The tire molding method according to claim 2 is characterized by the above.

4. When executing the step S2, a screw assembly (30) is driven by a motor to rotate, and a rolling roller assembly (21) on the turn-up mechanism is moved in the radial direction of the tire. The tire molding method according to claim 1 is characterized by the above.

5. When executing the step S2, in order that the rolling roller assembly (21) always abuts against the sidewall during movement, a limiting cylinder drives the rolling roller assembly (21) to press the sidewall of the tire. The tire molding method according to claim 4 is characterized by the above.

6. When performing the step S2, a plurality of first turn-up structures (20) of the turn-up mechanism are provided on the same side of the tire and arranged in the circumferential direction of the tire. The screw assembly (30) is connected to the plurality of first turn-up structures (20) and drives each of the first turn-up structures (20) to move in the radial direction of the tire to roll the sidewall. The tire forming method according to claim 4 is characterized in that.

7. When performing the step S2, a plurality of second turn-up structures (60) of the turn-up mechanism are all provided on the side opposite to the first turn-up structure (20) and arranged along the circumferential direction of the tire. The screw assembly (30) is connected to the plurality of second turn-up structures (60) and drives each of the second turn-up structures (60) to move in the radial direction of the tire to roll the sidewall. The tire forming method according to claim 6 is characterized in that.

8. A mechanical drum for implementing the tire forming method according to any one of claims 1 to 7, A spindle assembly (10) provided rotatably for moving and rotating the tire, A turn-up mechanism provided on the spindle assembly (10) for rolling the sidewall, A screw assembly (30) provided through the spindle assembly (10) and drivingly connected to the turn-up mechanism for driving the turn-up mechanism to move, A bonding mechanism (70) provided movably with respect to the spindle assembly (10) for bonding the bead filler and / or the sidewall to the tire blank of the tire. The mechanical drum is characterized by comprising.

9. The turn-up mechanism includes A plurality of first turn-up structures (20) provided in the circumferential direction of the spindle assembly (10). The screw assembly (30) is drivingly connected to each of the first turn-up structures (20) and drives each of the first turn-up structures (20) to move simultaneously in the radial direction of the tire, Further comprising a plurality of limiting cylinders (40) provided and connected in a one-to-one correspondence with the plurality of first turn-up structures (20) to drive each of the first turn-up structures (20) to press the tire, the mechanical drum according to claim 8.

10. The turn-up mechanism Further includes a slide sleeve assembly (50) fitted outside the spindle assembly (10) and provided so as to be movable in the axial direction of the spindle assembly (10), The plurality of first turn-up structures (20) are provided around the slide sleeve assembly (50), and the screw assembly (30) is drivingly connected to the slide sleeve assembly (50) via a screw nut (25) provided through the spindle assembly (10) to move each of the first turn-up structures (20), the mechanical drum according to claim 9.

11. The first turn-up structure (20) Further includes a rolling roller assembly (21) for rolling the sidewall of the tire, And a first drive rod assembly (22) drivingly connected to the rolling roller assembly (21), The screw assembly (30) is connected to the first drive rod assembly (22) and drives the rolling roller assembly (21) by the first drive rod assembly (22) to move in the radial direction of the tire, the mechanical drum according to claim 9.

12. The first turn-up structure (20) Further includes a second drive rod assembly (23) rotatably connected to the first drive rod assembly (22), The limiting cylinder (40) is connected to the second drive rod assembly (23) and presses the tire by driving the rolling roller assembly (21) by the first drive rod assembly (22), the mechanical drum according to claim 11.

13. The turn-up mechanism further includes a slide sleeve assembly (50) movably provided in the axial direction of the main shaft assembly (10). The first drive rod assembly (22) includes a third drive rod (221) and a fourth drive rod (222). The third drive rod (221) and the fourth drive rod (222) are rotatably connected to the slide sleeve assembly (50) respectively. The first turn-up structure (20) is connected to the first drive rod assembly (22) and further includes a support assembly (24) for supporting the side wall outside the turn-up mechanism. The mechanical drum according to claim 11, wherein the third drive rod (221), the support assembly (24), the fourth drive rod (222) and the slide sleeve assembly (50) are sequentially connected to form a four-bar linkage mechanism.

14. The turn-up mechanism further includes a plurality of second turn-up structures (60) arranged symmetrically with respect to the main shaft assembly (10) in a one-to-one correspondence with the plurality of the first turn-up structures (20). The mechanical drum according to claim 9, wherein the screw assembly (30) is drivingly connected to each of the second turn-up structures (60) to simultaneously drive each of the second turn-up structures (60) to move in the radial direction of the tire.

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