A tire forming apparatus and forming method with an exhaust device

Abstract

This invention relates to the field of tire technology, specifically to a tire forming equipment and method with an exhaust device. The equipment's exhaust pipe extends into the space between the tire's forming layers and moves vertically in a circular motion as the bonding drum rotates, performing a vacuuming action between the tire's forming layers. This prevents damage to the tire caused by interlayer gas during rolling, thus improving the yield rate of the formed tires.

Description

Technical Field

[0001] This invention relates to the field of tire technology, and more specifically to a tire forming equipment and forming method with an exhaust device. Background Technology

[0002] Tire molding is the most crucial process in tire production. It involves assembling various semi-finished products, such as the inner liner, carcass plies, bead wrapping, tread, gasket, sidewall, and belt layers, into a tire blank on a molding machine using specific techniques. The molding process is critical to ensuring tire quality. Among the most important processes in tire molding is the rolling process, which involves tightly pressing the tire components together to eliminate air bubbles. This rolling process determines the shape of the tire blank and the distribution of rubber compound thickness, playing a decisive role in tire quality.

[0003] Currently, the air venting of tire carcass components (PA composite + steel cylinder + carcass + bead) is mainly achieved by rolling metal or rubber rollers after the carcass is bonded. However, since the edges are pre-bonded at this point, the air passage is obstructed, resulting in poor air venting. Moreover, this rolling device has high requirements for process stability, especially the production performance of the rubber compound. If the self-adhesion of the product fluctuates, and the rolling program is not adjusted in time, the rolling may actually worsen the tire quality. Even the multi-plate roller devices recently improved by some tire companies still struggle to effectively solve the problem of interlayer air bubbles. The presence of interlayer air bubbles has a fatal impact on tire quality. Therefore, major tire manufacturers strictly control appearance standards to intercept tires with visible air bubbles or delamination defects, reducing waste or requiring rework. This results in a large number of defective products and internal losses, seriously affecting the company's profits. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this invention is to provide a tire forming device with an exhaust device. The exhaust pipe of this device extends into the forming layers of the tire and makes a vertical circumferential motion as the bonding drum rotates, thereby performing a vacuuming action between the forming layers of the tire. This avoids damage to the tire caused by interlayer gas during the rolling action and improves the pass rate of the formed tires.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A tire forming apparatus with an exhaust device includes: a main shaft, a bonding drum, and a main shaft motor. One end of the main shaft is connected to the rotating end of the main shaft motor, and the other end of the main shaft is inserted into the shaft of the bonding drum. The apparatus is characterized by having an annular vacuum track fixed around the main shaft, on which a vacuum device and a telescopic device are mounted. One end of the vacuum device facing the bonding drum is connected to an exhaust pipe, which includes a flexible hose and a rigid tube. One end of the flexible hose is connected to the vacuum device, and the other end is connected to the rigid tube. The telescopic device is mounted on the vacuum track and offset from the vacuum device. A connecting block is fixed to the tail end of the rigid tube, and the telescopic end of the telescopic device is fixed to the connecting block.

[0007] Preferably, the device also includes a main unit housing, in which the spindle motor is installed. The front end of the main unit housing has a cylindrical track groove, in which a vacuum track is fixed.

[0008] Preferably, the number of the air extraction tubes is at least one.

[0009] Preferably, the rigid portion of the extraction pipe is wrapped with a protective layer made of an anti-adhesive material.

[0010] Preferably, the protective layer is made of Teflon.

[0011] Preferably, the protective layer is also rigid, and when the number of suction pipes is greater than a certain value, the protective layer wraps around the rigid pipe portion of all suction pipes and forms an arc-shaped surface that can fit the drum.

[0012] Preferably, the front end of the rigid tube of the suction pipe extends slightly beyond the protective layer, and the extended portion of the rigid tube is a first bevel, with the inclination direction of the first bevel facing the surface of the mating drum. The front end of the protective layer is a second bevel, with the inclination direction of the second bevel facing the surface of the mating drum.

[0013] Preferably, the telescopic device is a cylinder.

[0014] A tire forming method, using a tire forming apparatus with an exhaust device, includes the following steps:

[0015] 1) Follow the normal procedure to bond the PA composite parts, and start the front working head of the rigid tube section to enter the waiting position;

[0016] 2) After the fabric at the bottom edge is attached, the front working head extends into the attachment drum and reaches the set position, so that the front working head is attached to the fabric at the bottom edge and enters the locked state. At this time, the curtain fabric starting work is completed and the curtain fabric attachment sequence begins.

[0017] 3) The entire vacuuming device moves in a circular motion within the circular track as the bonding drum rotates. After the employee has sewn the curtain fabric flat, the vacuuming and exhausting process is started.

[0018] The telescopic device then moves to pull the front working head away from the interlayer and retract it to the waiting position for the next tire.

[0019] As a preferred option, the front working head extends into the fitting drum 10-20mm further inward than the inner end of the steel ladle, and the vacuuming and exhaust time is 2-4 seconds.

[0020] The present invention provides a tire forming device with an exhaust device that adopts the above technical solution. The exhaust pipe of the device extends into the forming layer of the tire and makes a vertical circumferential motion as the bonding drum rotates, thereby performing a vacuuming action between the forming layers of the tire. This avoids damage to the tire caused by interlayer gas during the rolling action and improves the pass rate of the formed tire. Attached Figure Description

[0021] Figure 1 This is a front sectional view of the present invention.

[0022] Figure 2 This is a schematic diagram of the air extraction pipe structure.

[0023] Figure 3 This is a schematic diagram of the rigid tube section.

[0024] Figure 4 for Figure 1 A schematic diagram of the right side of the main unit chassis. Detailed Implementation

[0025] like Figure 1 As shown in Figures 2 and 4, a tire forming apparatus with an exhaust device is disclosed. The apparatus includes a main shaft 1, a bonding drum 2, and a main shaft motor 3. One end of the main shaft 1 is connected to the rotating end of the main shaft motor 3, and the other end of the main shaft 1 is inserted into the shaft of the bonding drum 2. The apparatus is characterized in that an annular vacuum track 4 is fixed around the main shaft 1, and a vacuum device 5 and a telescopic device 14 are installed on the vacuum track 4. One end of the vacuum device 5 facing the bonding drum 2 is connected to an exhaust pipe 6, which includes a flexible hose 7 and a rigid tube 8. One end of the flexible hose 7 is connected to the vacuum device 5, and the other end is connected to the rigid tube 8. The telescopic device is installed on the vacuum track 4 and is offset from the vacuum device 5. A connecting block 15 is fixed to the tail end of the rigid tube 8, and the telescopic end of the telescopic device 14 is fixed to the connecting block 15. When the vacuuming action is to be performed, the telescopic device 14 extends and pushes the connecting block 15, thereby allowing the rigid tube 8 to enter the tire molding layer. At this time, the flexible tube 7 is in a stretched state. The main shaft motor 3 drives the main shaft 1 to rotate, which in turn drives the bonding drum 2 to rotate. The vacuuming tube 3, the vacuuming device 5, and the telescopic device 14 rotate in a circular motion along the vacuuming track 4 with the bonding drum 2. After the fabric bonding sequence is completed, the vacuuming device 2 is activated to perform the vacuuming action.

[0026] The device also includes a main housing 9, inside which the spindle motor 3 is mounted. The front end of the main housing 9 has a cylindrical track groove 10, within which the vacuum track 4 is fixed. The main housing 9 improves the stability of the exhaust device.

[0027] like Figure 2 As shown, the number of extraction pipes 6 is at least one. The exhaust effect can be improved by increasing the number of extraction pipes 6.

[0028] like Figure 2 As shown in Figure 3, the rigid tube 8 of the vacuum pipe 6 is wrapped with a protective layer 11, which is made of an anti-adhesion material. When a vacuuming operation is performed, the gas between the tire molding layers is discharged, which increases the interlayer pressure. The protective layer 11 prevents the rigid tube 8 from sticking to the tire molding layers due to the increased pressure.

[0029] The protective layer 11 is made of Teflon.

[0030] The protective layer 11 is also rigid. When the number of suction pipes 6 is greater than one, the protective layer 11 wraps around the rigid pipe portion 8 of all suction pipes 6 and forms an arc-shaped surface that can fit the fitting drum 2. When the number of suction pipes 6 is large, the suction pipes are combined into a whole by the protective layer 11, which is convenient for operation. The formed arc-shaped surface fits the fitting drum better and improves the exhaust effect.

[0031] The front end of the rigid tube 8 of the vacuum pipe 6 extends slightly beyond the protective layer 11. The extended portion of the rigid tube 8 is a first beveled surface 12, with the inclination direction of the first beveled surface 12 facing the surface of the mating drum 2. The front end of the protective layer 11 is a second beveled surface 13, with the inclination direction of the second beveled surface 13 also facing the surface of the mating drum 2. The first beveled surface 12 and the second beveled surface 13 facilitate the insertion of the rigid tube 8 into the tire molding layers. At the same time, since both beveled surfaces face the surface of the mating drum 2, it prevents the molding layers from blocking the air vents of the rigid tube 8 during vacuuming, thus avoiding affecting the exhaust effect.

[0032] The telescopic device 14 is a cylinder.

[0033] A tire forming method, using a tire forming apparatus with an exhaust device, includes the following steps:

[0034] 1) Following the normal procedure, the PA composite component is bonded, and the working head at the front end of the rigid tube section 8 starts and enters the waiting position;

[0035] 2) After the fabric at the bottom edge is attached, the front working head extends into the attachment drum and reaches the set position, so that the front working head is attached to the fabric at the bottom edge and enters the locked state. At this time, the curtain fabric starting work is completed and the curtain fabric attachment sequence begins.

[0036] 3) The entire vacuum device 5 moves in a circular motion within the circular track as the bonding drum rotates. After the employee has sewn the curtain fabric flat, the vacuum pump is started to exhaust the air.

[0037] 4) Subsequently, the telescopic device 14 moves to pull the front working head away from the interlayer and retract it to the waiting position for the next tire.

[0038] The front working head extends into the fitting drum 2 10-20mm further inward than the inner end of the steel ladle, and the vacuuming and exhaust time is 2-4 seconds.

[0039] The foregoing description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A tire forming apparatus with an exhaust device, the apparatus comprising a main shaft (1), a bonding drum (2), and a main shaft motor (3), wherein one end of the main shaft (1) is connected to the rotating end of the main shaft motor (3), and the other end of the main shaft (1) is inserted into the shaft of the bonding drum (2); characterized in that, A circular vacuum track (4) is fixed around the main shaft (1). A vacuum device (5) and a telescopic device (14) are installed on the vacuum track (4). The vacuum device (5) is connected to a suction pipe (6) at one end facing the fitting drum (2). The suction pipe (6) includes a flexible hose (7) and a rigid pipe (8). One end of the flexible hose (7) is connected to the vacuum device (5), and the other end is connected to the rigid pipe (8). A connecting block (15) is fixed on the rigid pipe (8). The telescopic end of the telescopic device (14) is fixed to the connecting block (15).

2. The tire forming equipment with an exhaust device according to claim 1, characterized in that, The device also includes a main unit housing (9), in which the spindle motor (3) is installed. The front end of the main unit housing (9) has a cylindrical track groove (10), and the vacuum track (4) is fixed in the track groove (10).

3. The tire forming equipment with an exhaust device according to claim 1, characterized in that, The number of the extraction pipes (6) is at least 1.

4. The tire forming equipment with an exhaust device according to claim 3, characterized in that, The rigid tube section (8) of the air extraction tube (6) is covered with a protective layer (11) made of an anti-adhesive material.

5. The tire forming equipment with an exhaust device according to claim 4, characterized in that, The protective layer (11) is made of Teflon.

6. The tire forming equipment with an exhaust device according to claim 4, characterized in that, The protective layer (11) is also rigid. When the number of suction pipes (6) is greater than 1, the protective layer (11) wraps the hard pipe part (8) of all suction pipes (6) and forms an arc-shaped surface that can fit the drum (2).

7. The tire forming equipment with an exhaust device according to claim 4, characterized in that, The front end of the rigid tube section (8) of the air extraction tube (6) extends slightly beyond the protective layer (11). The extended part of the rigid tube section (8) is a first oblique surface (12). The oblique direction of the first oblique surface (12) is towards the surface of the mating drum (2). The front end of the protective layer (11) is a second oblique surface (13). The oblique direction of the second oblique surface (13) is towards the surface of the mating drum (2).

8. The tire forming equipment with an exhaust device according to claim 1, characterized in that, The telescopic device (14) is a cylinder.

9. A tire forming method, characterized in that, This method employs a tire forming apparatus with an exhaust device as described in any one of claims 1-8, and includes the following steps: 1) Following the normal procedure, the PA composite is bonded, and the front working head of the rigid tube section (8) starts to enter the waiting position; 2) After the fabric at the bottom edge is attached, the front working head extends into the attachment drum and reaches the set position, so that the front working head is attached to the fabric at the bottom edge and enters the locked state. At this time, the curtain fabric starting work is completed and the curtain fabric attachment sequence begins. 3) The entire vacuum device (5) moves in a circular motion within the circular track as the bonding drum rotates. After the employee has sewn the curtain fabric flat, the vacuum is started to exhaust the air. 4) Subsequently, the telescopic device (14) moves to pull the front working head away from the interlayer and retract it to the waiting position for the next tire.

10. A tire forming method according to claim 9, characterized in that, The front working head extends into the fitting drum (2) 10-20mm further inside the inner end of the steel ladle, and the vacuuming and exhaust time is 2-4 seconds.

Images