Tire manufacturing method and apparatus

Abstract

The present invention provides a tire manufacturing method and device, the tire manufacturing device including a main shaft, a turn-up rod assembly fitted to the outside of the main shaft, a shim plate assembly, a lock block assembly, and an intermediate drum assembly, the tire manufacturing method including the steps of adjusting initial diameter dimensions of the shim plate assembly, the lock block assembly, and the intermediate drum assembly, and applying a sizing agent, mounting a tire rim on the outside of the lock block assembly, adjusting the diameter of the lock block assembly to be larger, bringing the lock block assembly into contact with the tire rim, and locking the tire rim, adjusting the diameters of the shim plate assembly and the intermediate drum assembly so that the outer surfaces of the shim plate assembly, the lock block assembly, and the intermediate drum assembly are flush with each other, performing a turnover operation of the turn-up rod assembly to apply the sizing agent to the side of the tire, and performing a reverse operation of the turn-up rod assembly to reset after the application is completed, and adjusting the diameters of the shim plate assembly, the lock block assembly, and the intermediate drum assembly to be smaller, and removing the tire from the main shaft. The present invention solves the problem in the prior art that changing the size of the mechanical forming drum is time consuming and laborious.

Description

[Technical Field]

[0001] This invention claims priority to a Chinese patent application filed with the China Patent Office on December 31, 2020, bearing application number 202011636146.7 and entitled "Method and apparatus for manufacturing tires."

[0002] Technical Field The present invention relates to the technical field of tire processing, and in particular to a tire manufacturing method and apparatus. [Background technology]

[0003] Currently, tire building drums are divided into capsule drums and mechanical drums. The main difference between these two types of drums is the anti-packing method: capsule drums are turned up using anti-pack capsules, while mechanical drums are turned up using anti-pack bars. Mechanical drums are much more efficient than capsule drums in terms of tire building efficiency, so they have a large market share in semi-steel building machines. However, mechanical building drums have a complex structure, and side drums must be replaced when changing dimensions. Most tire factories of average size replace side drums quite frequently, and each side drum replacement typically takes about 20 to 30 minutes, resulting in significant losses for the tire factory. Summary of the Invention [Problem to be solved by the invention]

[0004] A primary object of the present invention is to provide a tire manufacturing method and apparatus that overcomes the time-consuming and laborious problem of changing the size of mechanical building drums in the prior art. [Means for solving the problem]

[0005] To achieve the above object, according to one alternative embodiment of the present invention, there is provided the following tire manufacturing method: The tire manufacturing apparatus includes a main shaft, a turn-up rod assembly fitted to the outside of the main shaft, a shim plate assembly, a lock block assembly, and an intermediate drum assembly, and the tire manufacturing method includes adjusting the initial diameter sizes of the shim plate assembly, the lock block assembly, and the intermediate drum assembly to material a step of attaching a tire rim to the outside of the lock block assembly, adjusting the diameter of the lock block assembly to increase, abutting the lock block assembly against the tire rim, and locking the tire rim; a step of adjusting the diameters of the shim plate assembly and the intermediate drum assembly so that the outer surfaces of the shim plate assembly, the lock block assembly, and the intermediate drum assembly are flush with each other to form a flat, uniform surface; and a step of adjusting the diameters of the shim plate assembly and the intermediate drum assembly so that the outer surfaces of the shim plate assembly, the lock block assembly, and the intermediate drum assembly are flush with each other to form a flat, uniform surface. Rubber materials to the side of the tire, and after the lamination is completed, the turn-up rod assembly is reversed to reset it; and the shim plate assembly, the lock block assembly, and the middle drum assembly are adjusted to reduce their diameters, and the tire is removed from the main shaft.

[0006] In one alternative embodiment, when adjusting the size of the initial diameter, if the size of the tire to be processed is a first preset size, the shim plate assembly is contracted and the diameters of the lock block assembly and the intermediate drum assembly are adjusted to a minimum diameter, and if the size of the tire to be processed is a second preset size larger than the first preset size, the shim plate assembly is expanded and the diameters of the lock block assembly and the intermediate drum assembly are adjusted to an intermediate diameter, and there is at least one intermediate diameter.

[0007] In one alternative embodiment, before the turn-up rod assembly performs the turnover operation, the forward / backward drive member of the shim plate assembly drives the shim plate block of the shim plate assembly to move in the axial direction, and after the shim plate block is retracted onto the roller of the turn-up rod assembly, the turn-up rod assembly performs the turnover operation, and the roller of the turn-up rod assembly Rubber materials Press the Rubber materials Stick it to the side of the tire.

[0008] In one optional embodiment, when adjusting the diameter of the shim plate assembly, a first beveled surface of the expansion drive member of the shim plate assembly interacts with a second beveled surface of a shim plate block of the shim plate assembly to change the diameter of the shim plate block to a target value.

[0009] In one alternative embodiment, when adjusting the diameter of at least one of the lock block assembly and the intermediate drum assembly, by applying pressure to different air chambers of the air cylinder of the drive assembly of the lock block assembly or the intermediate drum assembly, the transmission assembly of the lock block assembly or the intermediate drum assembly drives the piston of the drive assembly to move different distances to adjust the variable diameter member of the lock block assembly or the intermediate drum assembly to the minimum diameter, intermediate diameter, or maximum diameter; or by applying pressure to the air cylinder of the drive assembly, the piston is driven to move to a contracted position or an expanded position; or by not applying pressure to the air cylinder, the piston moves to an intermediate position under the action of the elastic member of the drive assembly so that the transmission member adjusts the variable diameter member to the minimum diameter, maximum diameter, or intermediate diameter; or the motor of the drive assembly drives the screw rod of the drive assembly to rotate, and the screw rod axially moves the nut of the drive assembly to adjust the variable diameter member to the minimum diameter, intermediate diameter, or maximum diameter.

[0010] In one alternative embodiment, the diameters of the shim plate assembly, lock block assembly, and intermediate drum assembly are adjusted in a stepwise or infinitely adjustable manner.

[0011] According to one optional embodiment of the present invention, there is provided a tire building apparatus including a main shaft, a turn-up rod assembly for processing a side edge of a tire, a shim plate assembly fitted onto the main shaft and expandable and contractible in the radial direction of the main shaft, a lock block assembly fitted onto the main shaft and expandable and contractible in the radial direction of the main shaft, and an intermediate drum assembly fitted onto the main shaft and expandable and contractible in the radial direction of the main shaft, wherein there are a plurality of the shim plate assemblies, lock block assemblies, and turn-up rod assemblies, and the lock block assemblies, shim plate assemblies, and turn-up rod assemblies are all installed sequentially on both sides of the intermediate drum assembly in a direction away from the intermediate drum assembly.

[0012] In one alternative embodiment, the shim plate assembly includes an expansion drive member installed along the axial direction of the main shaft and a shim plate block abutting the output end of the expansion drive member, and the shim plate block is capable of expanding and contracting in the radial direction of the main shaft by being driven by the expansion drive member.

[0013] In one optional embodiment, the output end of the expansion drive member has a first inclined surface and a second inclined surface inside the shim plate block, and the first inclined surface is aligned to abut and press against the second inclined surface, and the expansion drive member drives the shim plate block to expand and contract by pressing the first inclined surface against the second inclined surface.

[0014] In one alternative embodiment, the turn-up rod assembly has a roller at one end adjacent to the intermediate drum assembly, and the shim plate assembly further includes an advancing / retracting drive member drivingly connected to the shim plate block and adapted to drive the shim plate block to move in the axial direction of the main shaft to shield or retract the roller.

[0015] In one alternative embodiment, at least one of the lock block assembly and the intermediate drum assembly includes a drive assembly, a transmission assembly drivingly connected to the drive assembly, and a variable diameter member connected to the transmission assembly and configured to expand and contract radially of the main shaft under the drive of the transmission assembly to switch between a minimum diameter and a maximum diameter.

[0016] In one alternative embodiment, the drive assembly is installed along the axial direction of the main shaft, the transmission assembly is bent, one end of the transmission assembly is connected to the output end of the drive assembly, and the other end of the transmission assembly is connected to the variable diameter member.

[0017] In one alternative embodiment, the drive assembly includes an air cylinder and a piston movably mounted within the air cylinder and connected to the transmission assembly, the air cylinder being capable of forming a plurality of air chambers of different sizes, and when pressure is applied to the plurality of air chambers of different sizes, the piston moves different distances to form a minimum diameter, a maximum diameter, and at least one intermediate diameter between the minimum and maximum diameters, respectively, and the piston moves to a contracted position and an expanded position at the end of the air cylinder, and also to an intermediate position between the contracted and expanded positions.

[0018] In one selectable embodiment, the drive assembly includes an air cylinder, a piston movably installed within the air cylinder, and an elastic member abutting the piston, the piston having a contracted position and an expanded position at which it moves to the end of the air cylinder, and an intermediate position between the contracted and expanded positions, and when the elastic member is in a natural state, the piston is at the intermediate position, and when the piston is at the contracted position, the intermediate position, and the expanded position, the variable diameter member forms a minimum diameter, at least one intermediate diameter, and a maximum diameter that successively increase in diameter, respectively.

[0019] In one alternative embodiment, the drive assembly includes a motor, a screw rod drivingly connected to the motor and rotating under the drive of the motor, and a nut threadedly engaged with the screw rod by a screw thread and connected to the transmission assembly, the screw rod driving the nut to move axially between a contracted position, an intermediate position, and an expanded position to form a minimum diameter, at least one intermediate diameter, and a maximum diameter, the diameters of which successively increase, of the variable diameter member.

[0020] In the application of the technical solution of the present invention, the shim plate assembly, the lock block assembly, and the middle drum assembly can realize radial expansion and contraction, and the three can form a cylindrical outer surface at each radial position, which is used to bond each half material constituting a tire. When used, the initial diameters of the shim plate assembly, the lock block assembly, and the middle drum assembly can be adjusted according to the size of the tire to be processed so that the cylindrical outer surface formed by the three together meets the processing needs of the adhesive, etc., and then the tire rim is attached. Rubber materials The tire rim is secured to form a flat, circular surface by adjusting the diameter of the three components. The tire is then shaped by, for example, filling it with air via the turn-up rod assembly. After shaping, the tire can be removed by reducing the diameters of the shim plate assembly, lock block assembly, and intermediate drum assembly. The diameters of the shim plate assembly, lock block assembly, and intermediate drum assembly are all adjustable, so that the diameters of the three components can be adjusted appropriately to process tires of different sizes. This installation method allows the tire building equipment to process multiple tire sizes, and does not require side drum replacement; instead, it simply adjusts the diameter. This allows multiple tire sizes to be processed easily and quickly, saving time and labor, improving processing efficiency, and avoiding various losses associated with replacing side drums. At the same time, a single device can process two tire sizes, reducing production costs. [Effects of the Invention]

[0021] From the above description, it can be seen that the above-described embodiments of the present invention have the following technical effects. 1. Solve the time-consuming and laborious problem of changing the size of mechanical forming drums in the prior art. 2. The tire building equipment is capable of processing tires of multiple sizes, and does not require replacement of side drums, making it possible to process tires of multiple sizes easily and quickly. 3. It can save time and labor, improve processing efficiency, and avoid various losses caused by replacing side drums; 4. One machine can process two sizes of tires, reducing production costs. [Brief explanation of the drawings]

[0022] The specification drawings that form a part of this invention are intended to provide a further understanding of the invention, and the exemplary embodiments of the invention and their descriptions are intended to interpret the invention and are not intended to unduly limit the invention.

[0023] [Figure 1] 1 is a flowchart illustrating a tire manufacturing method according to the present invention. [Figure 2] 1 is a schematic diagram showing the configuration of a tire manufacturing apparatus according to the present invention. [Figure 3] FIG. 3 is an enlarged view of a portion P in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0024] It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without contradiction.The present invention will be described in detail below in conjunction with the embodiments with reference to the drawings.

[0025] To solve the problem of time-consuming and labor-intensive changing of mechanical building drum sizes in the prior art, the present invention provides a tire manufacturing method and apparatus.

[0026] Fig. 1 shows a tire manufacturing method, and Fig. 2 and Fig. 3 show a tire manufacturing apparatus including a main shaft 10, a turn-up rod assembly 20 fitted to the outside of the main shaft 10, a shim plate assembly 30, a lock block assembly 40, and an intermediate drum assembly 50. The tire manufacturing method includes adjusting the initial diameters of the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50, material a step of attaching a tire rim to the outside of the lock block assembly 40, adjusting the diameter of the lock block assembly 40 to increase it, abutting the lock block assembly 40 against the tire rim, and locking the tire rim; a step of adjusting the diameters of the shim plate assembly 30 and the intermediate drum assembly 50 so that the outer surfaces of the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50 are flush with each other to form a flat, uniform surface; and a step of adjusting the diameters of the shim plate assembly 30 and the intermediate drum assembly 50 so that the outer surfaces of the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50 are flush with each other to form a flat, uniform surface. Rubber materials to the side of the tire, and after the lamination is completed, the turn-up rod assembly 20 performs a reverse operation to reset it, and the shim plate assembly 30, the lock block assembly 40, and the middle drum assembly 50 are adjusted to reduce their diameters, and the tire is removed from the main shaft 10.

[0027] In this embodiment, the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50 can expand and contract radially, and the three components form a cylindrical outer surface at each radial position. This is used to bond the half materials that make up the tire. When in use, the initial diameters of the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50 are adjusted according to the dimensions of the tire to be processed so that the cylindrical outer surface formed by the three components together meets the processing needs of the adhesive, etc. Then, the tire rim is attached, Rubber materials The tire rim is secured to the tire rim by adjusting the diameter of the three components, forming a flat, circular surface. The tire is then shaped by, for example, inflating it via the turn-up rod assembly 20. After shaping, the tire can be removed by reducing the diameters of the shim plate assembly 30, lock block assembly 40, and intermediate drum assembly 50. The diameters of the shim plate assembly 30, lock block assembly 40, and intermediate drum assembly 50 are all adjustable, so the diameters of the three components can be adjusted appropriately to process tires of different sizes. This installation method allows the tire building equipment to process multiple tire sizes, and does not require side drum replacement; instead, it simply adjusts the diameter. This allows multiple tire sizes to be processed easily and quickly, saving time and labor, improving processing efficiency, and avoiding various losses associated with side drum replacement. At the same time, a single machine can process two tire sizes, reducing production costs.

[0028] This embodiment will be described using an example of processing two sizes of tires. The two sizes are divided into a first preset size and a second preset size, which are smaller. When adjusting the initial diameter, if the size of the tire to be processed is the first preset size, the shim plate assembly 30 contracts, and the lock block assembly 40 and the intermediate drum assembly 50 are adjusted to the minimum diameter. When the diameter subsequently expands, the tire rim or the like naturally restricts the size. If the size of the tire to be processed is the second preset size, which is larger than the first preset size, the shim plate assembly 30 expands during adjustment, and the diameter of the lock block assembly 40 and the intermediate drum assembly 50 is adjusted to the intermediate diameter. When the tire is subsequently re-inflated, the diameter is adjusted to the maximum diameter. Of course, in addition to processing two sizes of tires, multiple adjustable diameters may be added, allowing processing of more sizes of tires.

[0029] In this embodiment, before the turn-up rod assembly 20 performs the turnover operation, the forward / backward driving member 33 of the shim plate assembly 30 moves the shim plate block 32 of the shim plate assembly 30 in the axial direction, and the shim plate block 32 is retracted to the roller 21 of the turn-up rod assembly 20. After that, the turn-up rod assembly 20 performs the turnover operation, and the roller 21 of the turn-up rod assembly 20 Rubber materials Press the Rubber materials The shim plate block 32 is attached to the side of the tire. The shim plate block 32 has two movements, radial and axial, and the radial movement is to adjust the diameter to accommodate tires of different sizes. The axial movement is to shield or avoid the rollers 21 of the turn-up rod assembly 20. Specifically, when the turn-up rod assembly 20 is not operating, the shim plate assembly 30 shields the rollers 21 of the turn-up rod assembly 20, thereby forming a flat arc surface on the outer surface of the device and avoiding unevenness. Rubber materialsWhen the turn-up rod assembly 20 needs to operate, the shim plate block 32 can avoid the roller 21 under the drive of the forward / backward driving member 33, thereby allowing the turn-up rod assembly 20 to process the tire normally.

[0030] In this embodiment, when adjusting the diameter of the shim plate assembly 30, the first inclined surface of the expansion drive member 31 of the shim plate assembly 30 and the second inclined surface of the shim plate block 32 of the shim plate assembly 30 are adhered and pressed together, and the interaction between the two allows the diameter of the shim plate block 32 to contract or expand to the target value.

[0031] In this embodiment, the lock block assembly 40 and the middle drum assembly 50 have almost the same configuration, and the diameter adjustment methods for both are also the same. However, due to the different configurations adopted by the lock block assembly 40 and the middle drum assembly 50, the specific adjustment methods can be specifically as follows:

[0032] <Method 1> The lock block assembly 40 and the middle drum assembly 50 each include a drive assembly 41 having an air cylinder with multiple air chambers and a piston fitted with the air chambers, a transmission assembly 42, and a variable diameter member 43. By applying pressure to different air chambers of the air cylinder of the drive assembly 41 of the lock block assembly 40 or the middle drum assembly 50, the sizes of the air chambers vary, and the air chambers drive the drive assembly 41, causing the piston to move different distances between a contracted position, an intermediate position, and an expanded position. The piston movement distance is directly affected by the diameter of the variable diameter member 43, and the transmission assembly 42 of the lock block assembly 40 or the middle drum assembly 50 adjusts the variable diameter member 43 of the lock block assembly 40 or the middle drum assembly 50 to a minimum diameter, an intermediate diameter, or a maximum diameter.

[0033] <Method 2> The lock block assembly 40 and the middle drum assembly 50 still have the above-mentioned components, but the difference is that the air cylinder does not have air chambers of different sizes, but is equipped with an elastic member 413, which abuts against the piston, and when the elastic member 413 is in its natural state, the piston is positioned at an intermediate position by the action of the elastic member 413. By applying pressure to the air cylinder of the drive assembly 41, the piston is compressed or the elastic member 413 is pulled, moving it to a contracted or expanded position. When the piston needs to be at an intermediate position, no pressure is applied to the air cylinder, and the piston can be moved to the intermediate position by the action of the elastic member 413 of the drive assembly 41, thereby driving the transmission assembly 42 to adjust the variable diameter member 43 to the minimum diameter, maximum diameter, or intermediate diameter.

[0034] <Method 3> The drive assembly 41 of the lock block assembly 40 and the middle drum assembly 50 includes a motor, a screw rod, and a nut that are drivingly connected to each other. The motor of the drive assembly 41 rotates the screw rod of the drive assembly 41, causing the screw rod to move the nut of the drive assembly 41 axially, moving the nut between a contracted position, an intermediate position, and an expanded position, and the nut drives the variable diameter member 43 via the transmission assembly 42 to adjust the diameter to the minimum, intermediate, or maximum diameter.

[0035] All three of the above methods control the diameter of the variable diameter member 43 by controlling the axial movement distance of the output end of the drive assembly 41. Of course, other methods may be used to adjust the diameter of the variable diameter member 43. Furthermore, when adjusting the diameters of the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50, for example, multiple intermediate positions or intermediate diameters of different sizes may be provided, allowing for stepwise adjustment. Alternatively, any diameter between the maximum and minimum diameters may be set as the intermediate diameter, and the diameters of the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50 may be adjusted to a target value or the like by continuously adjusting the diameters.

[0036] 2 and 3, the tire building apparatus includes a main shaft 10, a turn-up rod assembly 20 for processing the side edges of a tire, a shim plate assembly 30 fitted on the main shaft 10 and expandable and contractable in the radial direction of the main shaft 10, a lock block assembly 40 fitted on the main shaft 10 and expandable and contractable in the radial direction of the main shaft 10, and an intermediate drum assembly 50 fitted on the main shaft 10 and expandable and contractable in the radial direction of the main shaft 10, wherein there are multiple shim plate assemblies 30, lock block assemblies 40, and intermediate drum assemblies 50, and the lock block assemblies 40, shim plate assemblies 30, and turn-up rod assemblies 20 are sequentially installed on both sides of the intermediate drum assembly 50 in a direction away from the intermediate drum assembly 50. As described above, by combining the above assemblies with each other and adjusting the formation of the above assemblies, the tire building apparatus can process tires of multiple sizes, and by simply adjusting the diameter size without the need to replace the side drums, tires of multiple sizes can be processed easily and quickly, not only saving time and labor but also improving processing efficiency and avoiding various losses caused by replacing the side drums.

[0037] 3, the shim plate assembly 30 includes an expansion drive member 31 disposed along the axial direction of the main shaft 10, and a shim plate block 32 that abuts against the output end of the expansion drive member 31 and is capable of expanding and contracting in the radial direction of the main shaft 10 by being driven by the expansion drive member 31. Specifically, the output end of the expansion drive member 31 has a first inclined surface, and the shim plate block 32 has a second inclined surface on the inside, and the first inclined surface is aligned to abut against and press against the second inclined surface. When the expansion drive member 31 operates, the first inclined surface presses against the second inclined surface, converting the axial movement of the expansion drive member 31 into radial movement, thereby expanding and contracting the shim plate block 32.

[0038] In this embodiment, the turn-up rod assembly 20 has a roller 21 adjacent to one end of the middle drum assembly 50, and the shim plate assembly 30 is further provided with a reciprocating drive member 33 installed radially along the main shaft 10 and directly or indirectly drivingly connected to the shim plate block 32. In addition to changing the diameter, the shim plate block 32 also has the function of shielding the roller 21. Specifically, when the turn-up rod assembly 20 is not operating, the shim plate block 32 shields the roller 21 under the action of the reciprocating drive member 33, so that the outer surface of the device forms a flat arc surface. When the turn-up rod assembly 20 is operating, the reciprocating drive member 33 drives the shim plate block 32 to return and retract the roller 21, allowing the turn-up rod assembly 20 to properly process the tire sidewall.

[0039] In this embodiment, the lock block assembly 40 and the middle drum assembly 50 have almost the same structure, and each includes a drive assembly 41 installed along the axial direction of the main shaft 10, a transmission assembly 42 drivingly connected to the drive assembly 41, and a variable diameter member 43 connected to the transmission assembly 42. The axial direction of the drive assembly 41 is perpendicular to the expansion direction of the variable diameter member 43, and the variable diameter member 43 forms an arcuate surface as the outermost part of the entire device, Rubber materialsThe variable diameter member 43 is driven by the transmission assembly 42 to expand and contract in the radial direction of the main shaft 10, and can be switched between a minimum diameter and a maximum diameter.

[0040] Generally, the variable diameter member 43 of the lock block assembly 40 is a lock block slider for matching with a tire rim and locking the tire rim, and the variable diameter member 43 of the intermediate drum assembly 50 is an intermediate drum, which is located in the axial center of the main shaft 10; Rubber materials matches.

[0041] In this embodiment, it is preferable that the diameter-changing portion 43 of the middle drum assembly 50 and the shim plate block 32 of the shim plate assembly 30 both have a toothed block structure.

[0042] One difference between the lock block assembly 40 and the intermediate drum assembly 50 lies in the specific configuration of the transmission assembly 42. The transmission assembly 42 of the lock block assembly 40 is a bent link, one end of which is rotatably connected to the output end of the drive assembly 41 and the other end of which is rotatably connected to the variable diameter member 43. The push link of the drive assembly 41 rotates the link, moving the variable diameter member 43 in the radial direction, thereby changing the direction of movement. The transmission assembly 42 of the intermediate drum assembly 50 further includes a middle drum slider in addition to the link, and the link is connected to the middle drum slider at a distance from one end of the drive assembly 41. The middle drum slider is connected to the variable diameter member 43, moving the variable diameter member 43 in the radial direction. Of course, in addition to the above-mentioned structure, other components may be added to the transmission assembly 42 as needed. Although the transmission assemblies 42 of the lock block assembly 40 and the intermediate drum assembly 50 have different configurations, they function in the same way, and both function as transmission and steering.

[0043] As described above, the drive assembly 41 includes a drive member 411 and an output member 412, and is configured such that the output member 412 moves in the axial direction of the drive member 411, so that the movement direction of the output member 412 is perpendicular to the expansion direction of the variable diameter member 43. Specific configurations include the following three configurations.

[0044] <Method 1> The driving member 411 is an air cylinder, and the output member 412 is a piston that is movably installed within the air cylinder, allowing a plurality of air chambers of different sizes to be formed. When pressure is applied to the air chambers of different sizes, the piston moves different distances. When the piston moves to one end of the air cylinder, it is in a contracted position, when it moves to the other end, it is in an expanded position, and when it moves to a position intermediate between the two ends of the air cylinder, it is in an intermediate position. When the piston is in these three positions, it forms a minimum diameter, a maximum diameter, and a diameter intermediate between the minimum and maximum diameters, respectively. In this way, by applying pressure to different air chambers, the piston moves different distances, and the variable diameter member 43 can be formed to have different diameters.

[0045] <Method 2> The driving member 411 is an air cylinder, the output member 412 is a piston, and the driving assembly 41 further includes an elastic member 413 movably installed within the air cylinder. This method differs from Method 1 in that this method does not have air chambers of different sizes, but instead uses the elastic member 413 to control the movement of the piston. The elastic member 413 abuts against the piston and is connected to the transmission assembly 42. The piston has a contracted position and an expanded position that move to the ends of the air cylinder, as well as an intermediate position between the contracted and expanded positions. When the elastic member 413 is in its natural state, the piston is located at the intermediate position. In this way, when the variable diameter member 43 needs to be formed to the minimum or maximum diameter, this can be achieved separately by applying pressure to both sides of the piston within the air cylinder or positive or negative pressure to one side of the piston. Furthermore, when it is necessary to form an intermediate diameter of the variable diameter member 43, pressure is not applied to the air cylinder and the piston is moved and held in the intermediate position by the action of the elastic member 413. In other words, when the piston is in the contracted position, intermediate position, or expanded position, the variable diameter member 43 forms the minimum diameter, intermediate diameter, and maximum diameter, which successively increase, respectively, thereby realizing the change of the diameter formed by the variable diameter member 43. The configuration shown in the drawings of this embodiment adopts this method. The elastic member 413 can be selected from an elastic member such as a spring as necessary.

[0046] <Method 3> The driving member 411 is a motor, and the output member 412 is a screw rod and a nut. This embodiment uses a motor-driven system, which can accurately control the stroke, so the screw rod is driven and connected to the motor and rotated by the motor, and the nut is threaded onto the screw rod via a screw thread and connected to the transmission assembly 42. In this way, when it is necessary to change the diameter of the variable diameter member 43, the motor rotates the screw rod, which moves the nut axially between the contracted position, the intermediate position, and the expanded position, so that the diameter formed by the variable diameter member 43 can be formed to have successively larger minimum diameter, intermediate diameter, and maximum diameter.

[0047] In this manner, the drive assembly 41 can drive the variable diameter member 43 to move to a desired position.

[0048] One or more of the above intermediate positions and intermediate diameters can be set as needed, and the diameters of the shim plate assembly 30, the lock block assembly 40, and the intermediate drum assembly 50 can be adjusted between the minimum diameter, the maximum diameter, and each intermediate diameter by stepped or continuous adjustment.

[0049] In the above embodiment, "plural" means at least two.

[0050] Apparently, the above-described embodiments are only some of the embodiments of the present invention, but not all of the embodiments, and all other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention without any creative work shall fall within the scope of protection of the present invention.

[0051] The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. [Explanation of symbols]

[0052] 10 spindle 20 Turn-up rod assembly 21 Laura 30 Shim Plate Assembly 31 Expansion drive member 32 Shim plate block 33 Advance / retreat drive member 40 Lock Block Assembly 41 Drive Assembly 411 Driving member 412 Output member 413 Elastic Members 42 Transmission Assembly 43 Variable diameter member 50 Medium Drum Assembly

Claims

1. 1. A tire manufacturing method comprising the steps of: The tire building apparatus includes a main shaft (10), a turn-up rod assembly (20) fitted to the outside of the main shaft (10), a shim plate assembly (30), a lock block assembly (40), and a middle drum assembly (50), The tire manufacturing method includes the steps of adjusting the initial diameters of the shim plate assembly (30), the lock block assembly (40), and the intermediate drum assembly (50) and applying a sizing agent; mounting a tire rim on the outside of the lock block assembly (40), adjusting the diameter of the lock block assembly (40) to be larger, abutting the lock block assembly (40) against the tire rim, and locking the tire rim; and forming a flat, uniform surface by making the outer surfaces of the shim plate assembly (30), the lock block assembly (40), and the intermediate drum assembly (50) flush with each other. a step of adjusting diameters of the shim plate assembly (30) and the intermediate drum assembly (50) so as to fit the sizing agent to the side of the tire; a step of the turn-up rod assembly (20) performing a turnover operation to apply the sizing agent to the side of the tire, and after the application is completed, the turn-up rod assembly (20) performing a reverse operation to reset; and a step of adjusting diameters of the shim plate assembly (30), the lock block assembly (40), and the intermediate drum assembly (50) so as to reduce the diameters, and removing the tire from the main shaft (10).

2. 2. The tire manufacturing method according to claim 1, wherein, when adjusting the initial diameter, if the size of the processed tire is a first preset size, the shim plate assembly (30) is contracted and the diameters of the lock block assembly (40) and the intermediate drum assembly (50) are adjusted to a minimum diameter, and if the size of the processed tire is a second preset size larger than the first preset size, the shim plate assembly (30) is expanded and the diameters of the lock block assembly (40) and the intermediate drum assembly (50) are adjusted to an intermediate diameter, and the intermediate diameter is at least one.

3. 2. The tire manufacturing method according to claim 1, characterized in that, before the turn-up rod assembly (20) performs a turnover operation, the forward / backward drive member (33) of the shim plate assembly (30) drives the shim plate block (32) of the shim plate assembly (30) to move in the axial direction, and the shim plate block (32) is retracted to the roller (21) of the turn-up rod assembly (20), and then the turn-up rod assembly (20) performs a turnover operation, and the roller (21) of the turn-up rod assembly (20) presses the sizing agent to bond the sizing agent to the side of the tire.

4. 2. The tire manufacturing method according to claim 1, characterized in that, when adjusting the diameter of the shim plate assembly (30), a first beveled surface of an expansion drive member (31) of the shim plate assembly (30) interacts with a second beveled surface of a shim plate block (32) of the shim plate assembly (30) to change the diameter of the shim plate block (32) to a target value.

5. When adjusting the diameter of at least one of the lock block assembly (40) and the middle drum assembly (50), by applying pressure to different air chambers of an air cylinder of the drive assembly (41) of the lock block assembly (40) or the middle drum assembly (50), the transmission assembly (42) of the lock block assembly (40) or the middle drum assembly (50) drives the piston of the drive assembly (41) to move different distances to adjust the variable diameter member (43) of the lock block assembly (40) or the middle drum assembly (50) to a minimum diameter, an intermediate diameter, or a maximum diameter; or Applying pressure to the air cylinder of the drive assembly (41) to drive the piston to move to a contracted or extended position; or By removing pressure from the air cylinder, the piston moves to an intermediate position under the action of the elastic member (413) of the drive assembly (41) so that the transmission member (42) adjusts the variable diameter member (43) to the minimum diameter, the maximum diameter or the intermediate diameter; or a motor of the drive assembly (41) drives a screw rod of the drive assembly (41) to rotate, and the screw rod axially moves a nut of the drive assembly (41) to adjust the variable diameter member (43) to the minimum diameter, the intermediate diameter or the maximum diameter; 2. The tire manufacturing method according to claim 1.

6. 2. The tire manufacturing method according to claim 1, wherein the diameters of the shim plate assembly (30), the lock block assembly (40), and the middle drum assembly (50) are adjusted in a stepwise or stepless manner.

7. A tire building apparatus comprising: a turn-up rod assembly (20) for processing a side edge of a tire; a shim plate assembly (30) fitted onto the main shaft (10) and expandable and contractable in a radial direction of the main shaft (10); a lock block assembly (40) fitted onto the main shaft (10) and expandable and contractable in the radial direction of the main shaft (10); and an intermediate drum assembly (50) fitted onto the main shaft (10) and expandable and contractable in the radial direction of the main shaft (10), wherein the shim plate assembly (30), the lock block assembly (40), and the turn-up rod assembly (20) are all plural, and the lock block assembly (40), the shim plate assembly (30), and the turn-up rod assembly (20) are sequentially installed on both sides of the intermediate drum assembly (50) in a direction away from the intermediate drum assembly (50).

8. The tire manufacturing apparatus according to claim 7, characterized in that the shim plate assembly (30) comprises an expansion drive member (31) installed along the axial direction of the main shaft (10) and a shim plate block (32) abutting against an output end of the expansion drive member (31), and the shim plate block (32) is capable of expanding and contracting in the radial direction of the main shaft (10) by being driven by the expansion drive member (31).

9. The tire building apparatus according to claim 8, characterized in that the output end of the expansion drive member (31) has a first inclined surface and a second inclined surface on the inside of the shim plate block (32), the first inclined surface is aligned so as to abut and press against the second inclined surface, and the expansion drive member (31) drives the shim plate block (32) to expand and contract by pressing the first inclined surface against the second inclined surface.

10. 9. The tire manufacturing apparatus according to claim 8, wherein the turn-up rod assembly (20) has a roller (21) at one end adjacent to the middle drum assembly (50), and the shim plate assembly (30) further comprises an advancing / retreating drive member (33) that is drivingly connected to the shim plate block (32) and drives the shim plate block (32) to move in the axial direction of the main shaft (10) to shield or retract the roller (21).

11. 8. The tire building apparatus according to claim 7, wherein at least one of the lock block assembly (40) and the intermediate drum assembly (50) comprises a drive assembly (41), a transmission assembly (42) drivingly connected to the drive assembly (41), and a variable diameter member (43) connected to the transmission assembly (42) and adapted to expand and contract in a radial direction of the main shaft (10) under the drive of the transmission assembly (42) so as to switch between a minimum diameter and a maximum diameter.

12. The tire manufacturing apparatus according to claim 11, characterized in that the drive assembly (41) is installed along the axial direction of the main shaft (10), the transmission assembly (42) is bent, one end of the transmission assembly (42) is connected to an output end of the drive assembly (41), and the other end of the transmission assembly (42) is connected to the variable diameter member (43).

13. 12. The tire building apparatus according to claim 11, wherein the drive assembly (41) comprises an air cylinder and a piston movably installed within the air cylinder and connected to the transmission assembly (42), the air cylinder being capable of forming a plurality of air chambers of different sizes, the piston moving different distances such that the variable diameter member (43) forms the minimum diameter, the maximum diameter, and at least one intermediate diameter between the minimum diameter and the maximum diameter, respectively, when applying pressure to the plurality of air chambers of different sizes, and the piston moving to a contracted position and an expanded position at an end of the air cylinder, and also to an intermediate position between the contracted position and the expanded position.

14. 12. The tire building apparatus according to claim 11, wherein the drive assembly (41) comprises an air cylinder, a piston movably installed within the air cylinder, and an elastic member (413) in contact with the piston and connected to the transmission assembly (42), the piston having a contracted position and an expanded position at which the piston moves to an end of the air cylinder, and an intermediate position between the contracted position and the expanded position, the piston being located at the intermediate position when the elastic member (413) is in a natural state, and the variable diameter member (43) forms the minimum diameter, at least one intermediate diameter, and the maximum diameter, the diameters of which are successively larger, when the piston is located at the contracted position, the intermediate position, and the expanded position.

15. 12. The tire building apparatus according to claim 11, wherein the drive assembly (41) comprises a motor, a screw rod drivingly connected to the motor and rotating under the drive of the motor, and a nut screwed to the screw rod by a screw thread and connected to the transmission assembly (42), wherein the screw rod drives the nut to move axially between a contracted position, an intermediate position, and an expanded position so as to form the minimum diameter, at least one intermediate diameter, and the maximum diameter, the diameters of which are successively larger than one another.

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