Tire molding method and machine 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, specifically to tire molding methods and mechanical drums.

Background Art

[0003] When turning up and molding an existing tire, mainly mechanical drums and bladder drums are separated by bonding the sidewalls 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 remains high.

[0004] In the case of a mechanical drum, the cost is low, but the existing tire molding process includes processes such as bead filler bonding, bead attachment, and turn - up processes, 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 objective of this application is to provide a tire molding method and a mechanical drum in order to solve the problems of the prior art, which include long tire molding times and low molding efficiency. [Means for solving the problem]

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

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

[0008] In one embodiment, when step S3 is performed, two suspension arms on the bonding mechanism are arranged symmetrically to simultaneously compact the sidewalls on both sides of the tire.

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

[0010] In one embodiment, when step S2 is performed, the rolling roller assembly is driven by a limiting cylinder to press against the sidewall of the tire so that the rolling roller assembly always contacts the sidewall while moving.

[0011] In one embodiment, when step S2 is performed, 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 a screw assembly is connected to the plurality of first turn-up structures, and each first turn-up structure is driven simultaneously to move radially around the tire to compact the sidewall.

[0012] In one embodiment, when step S2 is performed, the multiple second turn-up structures of the turn-up mechanism are all located on the opposite side from the first turn-up structure and are arranged along the circumferential direction of the tire, and the screw assembly is connected to the multiple second turn-up structures, and each second turn-up structure is driven simultaneously to move radially around the tire to compact the sidewall.

[0013] According to another aspect of this application, a mechanical drum for carrying out the above tire forming method is provided, the mechanical drum comprising: a spindle assembly rotatably mounted for moving and rotating a tire; a turn-up mechanism mounted on the spindle assembly for rolling the sidewall; a screw assembly mounted through the spindle assembly and driven to the turn-up mechanism for driving and moving the turn-up mechanism; and a bonding mechanism mounted movably relative to the spindle assembly for bonding a bead filler and / or sidewall to a tire blank of a tire.

[0014] In one embodiment, the turn-up mechanism includes a plurality of first turn-up structures provided circumferentially on the spindle assembly, the screw assembly being driven and connected to each first turn-up structure to drive each first turn-up structure to move simultaneously in the radial direction of the tire, and the turn-up mechanism further includes a plurality of limiting cylinders provided one-to-one and connected to the plurality of first turn-up structures to drive each first turn-up structure to press against the tire.

[0015] In one embodiment, the turn-up mechanism further includes a slide sleeve assembly fitted to the outside of the spindle assembly and provided to be movable in the axial direction of the spindle assembly, a plurality of first turn-up structures provided around the slide sleeve assembly, and a screw assembly driven and connected to the slide sleeve assembly via a screw nut provided through the spindle assembly to move each of the first turn-up structures.

[0016] In one embodiment, the first turn-up structure further includes a rolling roller assembly for rolling the sidewall of a tire, and a first drive rod assembly driven and connected to the rolling roller assembly, the screw assembly being connected to the first drive rod assembly, the first drive rod assembly driving the rolling roller assembly to move radially across the tire.

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

[0018] In one embodiment, the turn-up mechanism further includes a slide sleeve assembly provided to be axially movable of 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 being rotatably connected to the slide sleeve assembly, the first turn-up structure is connected to the first drive rod assembly and further includes a support assembly for supporting the outer sidewall of the turn-up mechanism, the third drive rod, the support assembly, the fourth drive rod and the slide sleeve assembly are sequentially connected to constitute a four-bar linkage mechanism.

[0019] In one embodiment, the turn-up mechanism further includes a plurality of second turn-up structures arranged symmetrically on the spindle assembly in a one-to-one correspondence with a plurality of first turn-up structures, the screw assembly being driven and connected to each of the second turn-up structures, and each of the second turn-up structures being driven simultaneously to move radially in the tire.

[0020] In a tire molding method applying the technical solution of this application, the overall tire molding time is shortened and interference between the two processes is avoided by performing part of the turn-up process and the bead filler bonding process simultaneously. To this end, the machine drum described below meets the specific need for part of the two processes to be performed simultaneously by improving its structure. The above tire molding method includes step S1, which controls the bonding mechanism to roll the bead filler and bond it to the tire blank, and step S2, which controls the turn-up mechanism to bond the bead filler and, in the process of bonding the bead filler, roll the sidewall and bond the sidewall to the tire blank. By performing the turn-up mechanism and the bead filler bonding process simultaneously, production efficiency is improved. [Brief explanation of the drawing]

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

[0022] [Figure 1] This is a schematic diagram showing part of the structure of an embodiment of the mechanical drum according to this application. [Figure 2] This is a schematic diagram showing part of the structure of an embodiment of the turn-up mechanism for a machine drum according to this application. [Modes for carrying out the invention]

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

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

[0025] Referring to FIGS. 1 to 2, the present application simultaneously executes a part of the operations of the turn-up process and the bead filler bonding process, so as to shorten the molding time of the entire tire and at the same time avoid the interference of the operations between the two processes. Therefore, the following mechanical drum improves the structure to provide a tire molding method that meets the need that a part of the operations of the two processes are performed simultaneously. Specifically, the above tire molding method includes 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, and 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 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. 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 molding method further includes step S3 after executing step S1. In step S3, in the process of the turn-up mechanism pressing the sidewall or after executing step S2, the bonding mechanism 70 is controlled to press the sidewall so as to bond the sidewall to the tire blank. The turn-up mechanism and the bonding mechanism 70 press 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 presses the sidewall at the end close to the center of the tire. The bonding mechanism 70 is provided on the outside along the radial direction of the tire and presses 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 circumferentially on the spindle assembly 10, and the screw assembly 30 is driven and connected to each first turn-up structure 20, driving 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 one-to-one to the plurality of first turn-up structures 20, driving each first turn-up structure 20 to press against the tire, and the cooperation of the limiting cylinders 40 and the screw assembly 30 realizes the function of the turn-up mechanism that compacts the sidewall along the radial direction of the tire blank.

[0029] To achieve the objective that the bonding mechanism 70 can simultaneously compact the sidewalls on both sides of the tire, the bonding mechanism 70 is provided with two suspension arms symmetrically arranged. The two suspension arms are driven by the same drive mechanism and can move simultaneously toward or toward each other. When the bonding mechanism 70 compacts the sides of the tire, the two suspension arms move toward each other and press the sidewalls against the sides of the tire blank, thereby compacting the sidewalls on both sides of the tire simultaneously.

[0030] When step S2 is performed, the motor drives and rotates the screw assembly 30 to move the rolling roller assembly 21 on the turn-up mechanism in the radial direction of the tire.

[0031] When step S2 is performed, the limiting cylinder 40 drives the rolling roller assembly 21 to press against the tire sidewall so that the rolling roller assembly 21 always contacts the sidewall while moving. Existing tire forming processes have the problem that, due to limitations in the turn-up drive configuration in the structure and layout, the operation of the turn-up mechanism is not possible because the rolling of the bead filler and the operation of the turn-up mechanism are not performed simultaneously, as the rolling of the bead filler and the operation of the turn-up mechanism are interfered with when the bonding mechanism 70 rolls the bead filler. In combination with the implementation of this method, this application provides a screw assembly inside the spindle assembly and moves the first turn-up structure 20 and the second turn-up structure 60 simultaneously by the screw assembly, moving them toward each other, thereby moving the rolling roller assembly 21 radially in the tire. At the same time, a limiting cylinder is provided in the spindle assembly and driven to the rolling roller assembly, thereby pressing the rolling roller assembly 21 against the sidewall and moving it. In order to achieve the above operation, the rolling roller assembly 21 and the first drive rod assembly 22 are also provided in the first turn-up structure 20 of this application. The rolling roller assembly 21 is used to roll the sidewall of the tire, and the first drive rod assembly 22 is driven and connected to the rolling roller assembly 21. The screw assembly 30 is connected to the first drive rod assembly 22, and the first drive rod assembly 22 moves the rolling roller assembly 21 radially along the tire. 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, causing it to slide axially along the spindle assembly 10, and the other end of the first drive rod assembly 22 swings relative to this end, thereby causing the rolling roller assembly 21 to roll along the contour of the side of the tire blank.

[0032] When step S2 is performed, the multiple first turn-up structures 20 of the turn-up mechanism are located on the same side of the tire and are arranged in the circumferential direction of the tire, and the screw assembly 30 is connected to the multiple 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 and compact the sidewall.

[0033] When step S2 is performed, the multiple second turn-up structures 60 of the turn-up mechanism are all located on the opposite side from the first turn-up structure 20 and are arranged along the circumferential direction of the tire. The screw assembly 30 is connected to the multiple second turn-up structures 60 and drives each of the second turn-up structures 60 simultaneously to move radially around the tire and compact the sidewall.

[0034] Multiple first turn-up structures 20 form a first annular structure, and multiple second turn-up structures 60 form a second annular structure. The first and second annular structures are fitted into the main spindle assembly 10 and are located on both sides of the tire blank, with their sidewalls bonded to the sides of the tire blank.

[0035] The screw assembly 30 is provided inside the spindle assembly 10, but both the first turn-up structure 20 and the second turn-up structure 60 are located outside the spindle assembly 10, enabling a drive connection between the screw assembly 30 and the first turn-up structure 20 and the second turn-up structure 60. To this end, in this application, a strip groove extending in the axial direction is provided in the spindle assembly 10, and the slide sleeve assembly 50 is fitted to the outside of the spindle assembly 10 and is provided to be movable in the axial direction of the spindle assembly 10. Here, the multiple first turn-up structures 20 are provided around the slide sleeve assembly 50, and the screw assembly 30 is driven and connected to the slide sleeve assembly 50 via a screw nut 25 provided through the spindle assembly 10, thereby moving each of the first turn-up structures 20. Here, the screw nut 25 is provided through the strip groove and 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 a 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 turn-up mechanism further includes a slide sleeve assembly 50 that is axially movable of the spindle assembly 10, and 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 being 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 outer sidewall of the turn-up mechanism, and 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. The provision of the above linkage mechanism enables the connection between the first drive assembly and the second drive assembly and the rolling roller assembly 21. [Explanation of symbols]

[0038] 10. Spindle Assembly 20. First turn-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 nuts 30 Screw Assembly 40 Restriction Cylinder 50 Slide Sleeve Assembly 60 Second turn-up structure 70 Bonding mechanism

Claims

1. A tire molding method, Step S1 controls the bonding mechanism (70) to press the bead filler and bond the bead filler to the tire blank of the tire, The process includes bonding the bead filler, or controlling the turn-up mechanism to press the sidewall to bond the sidewall to the tire blank during the bonding process, When step S2 is performed, the motor drives and rotates the screw assembly (30) to move the rolling roller assembly (21) on the turn-up mechanism in the radial direction of the tire. The tire molding method further includes step S3 after performing step S1, A tire forming method characterized in that, in step S3, the turn-up mechanism controls the bonding mechanism (70) to roll the sidewall and bond it to the tire blank during the process of rolling the sidewall or after step S2 is performed, and the turn-up mechanism and the bonding mechanism (70) roll different positions of the sidewall, respectively.

2. The tire molding method according to claim 1, characterized in that when step S3 is performed, the two suspension arms on the bonding mechanism (70) are provided symmetrically and simultaneously roll the sidewalls on both sides of the tire.

3. The tire molding method according to claim 1, characterized in that when step S2 is performed, the rolling roller assembly (21) is driven by a limiting cylinder to press against the sidewall of the tire so that the rolling roller assembly (21) is always in contact with the sidewall while moving.

4. The tire molding method according to claim 1, characterized in that when step S2 is performed, 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 each of the first turn-up structures (20) is driven simultaneously to move in the radial direction of the tire and compact the sidewall.

5. The tire molding method according to claim 4, characterized in that when step S2 is performed, the plurality of second turn-up structures (60) of the turn-up mechanism are all provided on the opposite side from the first turn-up structure (20) and are arranged along the circumferential direction of the tire, the screw assembly (30) is connected to the plurality of second turn-up structures (60), and each of the second turn-up structures (60) is driven simultaneously to move in the radial direction of the tire and compact the sidewall.

6. A mechanical drum for carrying out the tire molding method described in any one of claims 1 to 5, A rotatable main shaft assembly (10) for moving and rotating the tire, A turn-up mechanism is provided in the spindle assembly (10) for compacting the sidewall, A screw assembly (30) is provided through the spindle assembly (10) and is driven and connected to the turn-up mechanism, and is used to drive and move the turn-up mechanism. A mechanical drum characterized by comprising a bonding mechanism (70) that is movably mounted relative to the spindle assembly (10) for bonding a bead filler and / or the sidewall to the tire blank of the tire.

7. The aforementioned turn-up mechanism is The screw assembly (30) includes a plurality of first turn-up structures (20) provided circumferentially on the main spindle assembly (10), each of which is driven 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. The mechanical drum according to claim 6, further comprising a plurality of limiting cylinders (40) provided in a one-to-one correspondence with a plurality of the first turn-up structures (20), and connected to each of the first turn-up structures (20) for driving each of the first turn-up structures (20) to press the tire.

8. The aforementioned turn-up mechanism is The present invention further includes a slide sleeve assembly (50) fitted to the outside of the spindle assembly (10) and provided to be movable in the axial direction of the spindle assembly (10), The machine drum according to claim 7, characterized in that a plurality of the first turn-up structures (20) are provided around the slide sleeve assembly (50), and the screw assembly (30) is driven and 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).

9. The first turn-up structure (20) is, A rolling roller assembly (21) for compacting the tire sidewall, The rolling roller assembly (21) further includes a first drive rod assembly (22) which is driven and connected to the rolling roller assembly (21), The mechanical drum according to claim 7, characterized in that the screw assembly (30) is connected to the first drive rod assembly (22), and the first drive rod assembly (22) drives the rolling roller assembly (21) to move in the radial direction of the tire.

10. The first turn-up structure (20) is, The system further includes a second drive rod assembly (23) rotatably connected to the first drive rod assembly (22), The machine drum according to claim 9, characterized in that the limiting cylinder (40) is connected to the second drive rod assembly (23), and the first drive rod assembly (22) drives the rolling roller assembly (21) to press the tire.

11. The turn-up mechanism further includes a slide sleeve assembly (50) that is movably mounted in the axial direction of the spindle assembly (10), and 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) being rotatably connected to the slide sleeve assembly (50), 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 outer sidewall of the turn-up mechanism. The mechanical drum according to claim 9, characterized in that 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.

12. The aforementioned turn-up mechanism is The present invention further includes a plurality of second turn-up structures (60) arranged symmetrically on the spindle assembly (10) in a one-to-one correspondence with the plurality of first turn-up structures (20), The mechanical drum according to claim 7, characterized in that each screw assembly (30) is driven and connected to each of the second turn-up structures (60), and each of the second turn-up structures (60) is driven simultaneously to move in the radial direction of the tire.

Images