Tire molding method and mechanical drum

Abstract

The present application provides a tire forming method and a mechanical drum. The tire forming method includes a step of controlling a bonding mechanism to press a bead filler and bond the bead filler to a tire blank of a tire, a step of controlling a turn-up mechanism to support a sidewall of the tire while bonding the bead filler or in a process of bonding the bead filler, and a step of controlling the turn-up mechanism to press the sidewall of the tire after the bead filler is bonded. 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 patent application filed with the China National Intellectual Property Administration on June 17, 2022, with application number 202210690247.5 and invention title "Tire Molding Method and Mechanical Drum", and all its contents are 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, depending on the bonding method of the tire sidewall, mainly mechanical drums and bladder drums are distinguished. When the bladder drum turns up the tire sidewall, 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 forming quality of the tire bead compared to mechanical drums. Therefore, the rejection rate of tires is high and the cost remains high.

[0004] In the case of mechanical drums, the cost is low, but mechanical drums take a long time when rolling the tire, which is disadvantageous for mass production. Therefore, even though the cost is low, the applicability of mechanical drums is also low compared to bladder drums.

Summary of the Invention

Problems to be Solved by the Invention

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

Means for Solving the Problems

[0006] To achieve the above object, in one embodiment of the present application, a tire molding method is provided. The tire molding method includes a step of controlling a bonding mechanism to press a bead filler and bond the bead filler to a tire blank of a tire, a step of controlling a turn-up mechanism to support a sidewall of the tire before bonding the bead filler or when bonding the bead filler, and a step of controlling the turn-up mechanism to press the sidewall of the tire after bonding the bead filler.

[0007] In one embodiment of the present application, after bonding the bead filler, it moves to press the sidewall and controls the bonding mechanism to bond the sidewall to the tire blank.

[0008] In one embodiment of the present application, the bonding mechanism simultaneously presses the sidewalls on both sides of the tire by two suspension arms respectively.

[0009] In one embodiment of the present application, first, the turn-up mechanism is controlled to press the sidewall, and then, after the turn-up mechanism presses, the bonding mechanism is controlled to press the sidewall.

[0010] In one embodiment of the present application, when the turn-up mechanism presses the sidewall, the first turn-up structure of the turn-up mechanism first moves from the inside to the outside along the radial direction of the tire to press the sidewall, and then moves from the outside to the inside along the radial direction of the tire to press the sidewall.

[0011] In one embodiment of the present application, a first drive assembly in the first turn-up structure drives a rolling roller assembly in the first turn-up structure to move in the radial direction of the tire.

[0012] In one embodiment of the present application, as the rolling roller assembly moves along the radial direction of the tire and always abuts against the sidewall, the rolling roller assembly in the first turn-up structure is driven by the second drive assembly in the first turn-up structure to press the sidewall.

[0013] In another embodiment of the present application, a mechanical drum for implementing the above tire forming method is provided. The mechanical drum is rotatably provided and includes a main shaft assembly for moving and rotating the tire, a turn-up mechanism provided on the main shaft assembly for rolling the sidewall of the tire and bonding it to the side surface of the tire blank, and a bonding mechanism movably provided on one side of the main shaft assembly for bonding the bead filler and / or the sidewall to the tire blank of the tire.

[0014] In one embodiment of the present application, the turn-up mechanism includes a plurality of first turn-up structures provided in the circumferential direction of the main shaft assembly. The first turn-up structure includes a rolling roller assembly for rolling the sidewall of the tire, a first drive rod assembly drivingly connected to the rolling roller assembly, a first drive assembly connected to the first drive rod assembly for driving the rolling roller assembly to move in the radial direction of the tire by the first drive rod assembly, a second drive rod assembly rotatably connected to the first drive rod assembly, a second drive assembly drivingly connected to the second drive rod assembly for driving the rolling roller assembly to press the tire by the first drive rod assembly, and a support assembly connected to the first drive rod assembly for supporting the sidewall outside the turn-up mechanism.

[0015] In one embodiment of the present application, the first turn-up structure is provided on the support assembly and further includes a bladder for expanding outwardly outside the turn-up mechanism in an inflated state to support the sidewall.

[0016] In the tire forming method to which the technical solution of the present application is applied, by performing part of the operations of the turn-up process and the bead filler bonding process simultaneously, the forming time of the entire tire is shortened. At the same time, in order to avoid the interference of the operations between the two processes, the following mechanical drum improves its structure to meet the above needs that part of the operations of the two processes are performed simultaneously. Also, in order for the turn-up mechanism to shorten the time for rolling the sidewall and improve the bonding quality and efficiency of the sidewall, in the tire forming method of the present application, a function of supporting the sidewall in advance is added. Specifically, in the process of controlling the bonding mechanism to roll the bead filler and bond the bead filler to the tire blank of the tire, in order for the sidewall to converge toward the tire blank of the tire and deform earlier toward the side surface of the tire blank, the turn-up mechanism is synchronously controlled to support the sidewall. Then, by rolling with the turn-up mechanism, the sidewall and the tire blank can be bonded more closely. After bonding the bead filler, the turn-up mechanism is controlled to roll the sidewall of the tire. At this time, the rolling roller assembly of the turn-up mechanism can roll the sidewall quickly, and the sidewall can be well combined with the tire blank, thereby improving the efficiency of tire forming.

Brief Description of the Drawings

[0017] To more clearly explain the technical solutions in the embodiments of the present application or the prior art, the drawings necessary for the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0018] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. Hereinafter, the present application will be described in detail with reference to the accompanying drawings in combination with the embodiments.

[0019] 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.

[0020] Referring to FIGS. 1 to 4, in the tire forming method of the present application, before the bonding of the bead filler is completed, the sidewall is supported to ensure that when the sidewall is subsequently calendered, it can be well bonded to the tire blank within a short time, thereby shortening the forming time of the entire tire. At the same time, in order to avoid the interference of the operations between the two processes, the following mechanical drum improves the structure to meet the above needs that a part of the operations of the two processes can be carried out simultaneously. In addition, in order to shorten the time for the turn-up mechanism to calender the sidewall and improve the bonding quality and efficiency of the sidewall, in the tire forming method of the present application, a function of pre-supporting the sidewall is added. Specifically, in the process of controlling the bonding mechanism 30 to roll the bead filler and bond the bead filler to the tire blank of the tire, in order for the sidewall to converge toward the tire blank of the tire and deform earlier toward the side surface of the tire blank, the turn-up mechanism is synchronously controlled to support the sidewall. Then, by calendering with the turn-up mechanism, the sidewall and the tire blank can be bonded more closely. After bonding the bead filler, the turn-up mechanism is controlled to calender the sidewall of the tire. At this time, the calender roller assembly of the turn-up mechanism can calender the sidewall quickly, and the sidewall can be well combined with the tire blank, thereby improving the efficiency of tire forming.

[0021] In addition to using the turn-up mechanism to turn up the sidewall, after bonding the bead filler, the present application controls the bonding mechanism 30 to move and calender the sidewall to bond the sidewall to the tire blank. Specifically, when operating, the bonding mechanism and the turn-up mechanism are each made to calender the sidewall. The bonding mechanism and the turn-up mechanism can calender the entire sidewall within different periods in order to improve the bonding quality of the sidewall.

[0022] In order to achieve the object that the bonding mechanism 30 can simultaneously roll the sidewalls on both sides of the tire, two suspension arms are symmetrically provided on the bonding mechanism 30, a turn-up rolling roller is provided on the suspension arm, and the two turn-up rolling rollers can move synchronously, so they can approach the spindle assembly simultaneously or move away from the spindle assembly 10. Also, the two suspension arms can move closer to or away from each other simultaneously. When the bonding mechanism 30 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, and simultaneously roll the sidewalls on both sides of the tire respectively.

[0023] In order to avoid the operating interference between the turn-up mechanism and the bonding mechanism when rolling the sidewall, in one embodiment of the present application, first, the turn-up mechanism is controlled to roll the sidewall, and then, after the turn-up mechanism has rolled, the bonding mechanism 30 is controlled to roll the sidewall. Specifically, a detection assembly is also provided on the mechanical drum of the present application. The detection assembly includes two symmetrically provided detection switches. The detection switch is used to detect the position of the first turn-up structure. When the first turn-up structure returns to the initial position along the radial direction of the tire, the detection switch detects a signal. At this time, the spindle assembly rotates at high speed to lift the sidewall, and the two suspension arms of the bonding mechanism move closer to each other to the innermost position of the side of the tire to perform the second turn-up of the sidewall.

[0024] In order to improve the bonding quality of the turn-up mechanism pressing the sidewall, the present application controls the turn-up mechanism to press the sidewall in two stages. Specifically, when the turn-up mechanism presses the sidewall, first, the first turn-up structure 20 of the turn-up mechanism is moved from the inside to the outside in the radial direction of the tire to press the sidewall, and then the first turn-up structure 20 is moved from the outside to the inside along the radial direction of the tire to press the sidewall, so that the pressing on both sides is realized in an optimal path.

[0025] To avoid the operation interference between the bonding mechanism and the turn-up mechanism, the mechanical drum of the present application is provided with the bonding mechanism outside the spindle assembly and the turn-up mechanism on the spindle assembly. When performing the turn-up operation, the first turn-up structure 20 moves from the outside to the inside along the radial direction of the tire. After the movement of the first turn-up structure is completed, the bonding mechanism 30 is driven to press the sidewall from the outside to the inside along the radial direction of the tire, so as to realize the front and rear pressing.

[0026] The first drive assembly 211 in the first turn-up structure 20 drives the rolling roller assembly 201 in the first turn-up structure 20 to move in the radial direction of the tire. Since the rolling roller assembly rolls into contact with the sidewall, the friction is effectively reduced, and the damage to the sidewall is effectively reduced.

[0027] As the rolling roller assembly 201 moves along the radial direction of the tire and always abuts against the sidewall, the second drive assembly 221 in the first turn-up structure 20 drives the rolling roller assembly 201 of the first turn-up structure 20 to press the sidewall.

[0028] For implementation in combination with the above method, the present application provides a specific mechanical drum for implementing the above tire molding method. The mechanical drum includes a spindle assembly 10, a turn-up mechanism, and a bonding mechanism 30. The spindle assembly 10 is rotatably provided to move and rotate the tire. The spindle assembly employs a hollow shaft. The turn-up mechanism can move and rotate the tire blank of the tire. The turn-up mechanism is provided on the spindle assembly 10 to press the sidewall of the tire and bond it to the side surface of the tire blank. The bonding mechanism 30 is movably provided on one side of the spindle assembly 10 to bond the bead filler and / or the sidewall to the tire blank of the tire.

[0029] Referring to FIGS. 1 to 2, the turn-up mechanism of the present application is provided on the spindle assembly 10 and is mainly used to turn up the tire blank after attaching the bead and bond the sidewall 50 to the side surface of the tire blank. Instead of bladder turn-up, a mechanical drum is used, and by improving the mechanical drum turn-up structure, the stability of the turn-up mechanism is increased, the sidewall 50 can be bonded to the tire blank with high quality, the turn-up time of the tire is significantly shortened, and the manufacturing efficiency is increased. Specifically, it is provided as follows.

[0030] The turn-up mechanism of the present application includes a plurality of first turn-up structures 20 provided in the circumferential direction of the main shaft assembly. The first turn-up structure 20 includes a rolling roller assembly 201, a first drive rod assembly, a first drive assembly 211, a support assembly 25, and a bladder. The rolling roller assembly 201 is used to roll the wall side 50 of the tire. The rolling roller assembly 201 directly abuts against the sidewall 50 to roll the sidewall 50 of the tire, and thereby is used to press the sidewall 50 against the tire blank. The first drive rod assembly 21 is drivingly connected to the rolling roller assembly 201. The first drive assembly 211 is connected to the first drive rod assembly 21, and drives the first drive rod assembly 21 to swing, so as to move the rolling roller assembly 201 along the radial direction of the tire. For the second drive rod assembly 22 and the second drive assembly 221, the second drive rod assembly 22 is rotatably connected to the first drive rod assembly 21, the second drive assembly 221 is drivingly connected to the second drive rod assembly 22, and the first drive rod assembly 21 drives the rolling roller assembly 201 to press the tire.

[0031] In order to shorten the time for the rolling roller assembly 201 to roll the sidewall 50, the support assembly 25 is connected to the first drive rod assembly to support the sidewall 50 outside the turn-up mechanism. After being lifted, the support assembly 25 forms an angle with the end perpendicular to the sidewall 50 of the tire or the end away from the tire inclined outward of the tire. The bladder is provided on the support assembly 25 and expands outward toward the outside of the turn-up mechanism in an inflated state to support the sidewall 50. The pre-support before rolling on the sidewall 50 not only saves the subsequent rolling time of the rolling roller assembly 201, but also can effectively avoid the sidewall 50 pressed by the rollers on the rolling roller assembly 201 from sticking to the tire blank.

[0032] The first drive rod assembly includes a fourth drive rod 24, a first drive rod, and a third drive rod 23. One end of the fourth drive rod 24 is connected to the first drive assembly 211. The first drive rod is rotatably connected to the other end of the fourth drive rod 24. One end of the third drive rod 23 is rotatably connected to an end of the rolling roller assembly 201 of the support assembly 25 that is away from the rolling roller assembly 201. The other end of the third drive rod 23 is rotatably connected to the fourth drive rod 24. The fourth drive rod 24, the first drive rod, the support assembly 25, and the third drive rod 23 are sequentially connected to form a four-bar linkage mechanism.

[0033] The connection forms between the second drive rod assembly 22 and the first drive rod assembly are various, including a rotatable connection between the second drive rod assembly 22 and the first drive rod or a rotatable connection between the second drive rod assembly 22 and the third drive rod 23.

[0034] In addition, the mechanical drum of the present application further includes a lock ring structure 40. There are two lock ring structures 40, which are symmetrically provided with respect to the main shaft assembly and are located between the two turn-up mechanisms. They are used to lock the bead of the tire to fix the tire blank.

[0035] It should be noted that the terms used in this specification are only for explaining specific embodiments and are not intended to limit the exemplary embodiments of the present application. As used in this specification, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. Also, when the terms "comprising" and / or "including" are used in this specification, it should be understood that they indicate the presence of features, steps, operations, devices, assemblies, and / or combinations thereof.

[0036] Unless otherwise specified, the relative arrangements, mathematical formulas, and numerical values of the members and steps described in these embodiments do not limit the scope of this application. At the same time, for ease of explanation, it should be understood that the sizes of the parts shown in the drawings are not drawn according to the actual proportional relationships. Technologies, methods, and devices known to those skilled in the art may not be described in detail, but when appropriate, the technologies, methods, and devices should be regarded as part of the approved specification. In all the examples shown and discussed here, any specific values should be interpreted merely as illustrative and not as limitations. Therefore, other examples of the exemplary embodiments can have different values. In addition, since similar symbols or characters represent similar items in the following drawings, once an item is defined in one drawing, there is no need for further explanation in later drawings.

[0037] For ease of explanation, in this specification, spatially relative terms such as "above...", "over...", "on the upper surface of...", "upper surface of...", etc. are used to indicate the spatial positional relationship between one device or feature shown in the figure and another device or feature. It should be understood that the spatially relative terms are intended to include orientations in uses or operations other than the illustrated orientation of the device. For example, if the device in the drawing is inverted, a device described as "above another device or structure" or "on another device or structure" will be described as "below another device or structure" or "under another device or structure" after inversion. Therefore, the exemplary term "above..." can include two orientations, "above..." and "below...". This device may be positioned in other different ways (rotated 90 degrees or in other orientations), and accordingly, the spatially relative descriptions used in this specification are interpreted.

[0038] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the spirit and principle of the present application should be included within the scope of the present application.

Explanation of Reference Numerals

[0039] 10 Spindle assembly 20 First turn-up structure 201 Rolling roller assembly 21 First drive rod assembly 211 First drive assembly 22 Second drive rod assembly 221 Second drive assembly 23 Third drive rod 24 Fourth drive rod 25 Support assembly 30 Laminating mechanism 40 Locking ring structure 50 Sidewall

Claims

1. A tire molding method, comprising: controlling a bonding mechanism (30) to press a bead filler and bond the bead filler to a tire blank of the tire; controlling a turn-up mechanism to support a sidewall (50) of the tire before or when bonding the bead filler; and controlling the turn-up mechanism to press the sidewall (50) of the tire after bonding the bead filler. The tire molding method is characterized by including the above steps.

2. After bonding the bead filler, moving to press the sidewall (50), and controlling the bonding mechanism (30) to bond the sidewall (50) to the tire blank. The tire molding method according to claim 1 is characterized by this.

3. The bonding mechanism (30) simultaneously presses the sidewalls (50) on both sides of the tire by two suspension arms. The tire molding method according to claim 2 is characterized by this.

4. First, controlling the turn-up mechanism to press the sidewall (50), and then, after the turn-up mechanism presses, controlling the bonding mechanism (30) to press the sidewall (50). The tire molding method according to claim 2 is characterized by this.

5. When the turn-up mechanism presses the sidewall (50), the first turn-up structure (20) of the turn-up mechanism first moves from the inside to the outside along the radial direction of the tire to press the sidewall (50), and then moves from the outside to the inside along the radial direction of the tire to press the sidewall (50). The tire molding method according to claim 1 is characterized by this.

6. A first driving assembly (211) within the first turn-up structure (20) drives a rolling roller assembly (201) within the first turn-up structure (20) to move in the radial direction of the tire. The tire molding method according to claim 5 is characterized by this.

7. The tire forming method according to claim 6, characterized in that, as the rolling roller assembly (201) moves along the radial direction of the tire and always abuts against the sidewall (50), the second drive assembly (221) in the first turn-up structure (20) drives the rolling roller assembly (201) in the first turn-up structure (20) to press the sidewall (50).

8. A mechanical drum for implementing the tire forming method according to any one of claims 1 to 6, comprising: a spindle assembly (10) rotatably provided for moving and rotating the tire; a turn-up mechanism provided on the spindle assembly (10) for rolling the sidewall (50) of the tire and bonding it to the side surface of the tire blank; A mechanical drum, characterized in that it is movably provided on one side of the spindle assembly (10) and includes a bonding mechanism (30) for bonding a bead filler and / or the sidewall (50) to the tire blank of the tire.

9. The turn-up mechanism includes a plurality of first turn-up structures (20) provided in the circumferential direction of the spindle assembly (10), and the first turn-up structure includes: a rolling roller assembly (201) for rolling the sidewall (50) of the tire; a first drive rod assembly (21) drivingly connected to the rolling roller assembly (201), and a first drive assembly (211) connected to the first drive rod assembly (21) for driving the rolling roller assembly (201) by the first drive rod assembly (21) to move in the radial direction of the tire; a second drive rod assembly (22) rotatably connected to the first drive rod assembly (21), and a second drive assembly (221) drivingly connected to the second drive rod assembly (22) for driving the rolling roller assembly (201) by the first drive rod assembly (21) to press the tire; The mechanical drum according to claim 8, characterized in that it includes a support assembly (25) connected to the first drive rod assembly (21) for supporting the sidewall (50) outside the turn-up mechanism.

10. The first turn-up structure includes: The machine drum according to claim 9, further comprising a bladder provided in the support assembly (25) and expanding outwardly of the turn-up mechanism in an inflated state to support the side wall (50).

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