Process for improving the tire side bulging of an off-the-road tire and method of detection

Abstract

This invention relates to a process and testing method for improving sidewall bulging in engineering machinery tires, belonging to the tire manufacturing field. It includes the following steps: a. Butt-fitting the joints of the airtight layer and the release liner composite, followed by compaction; b. Cutting the sidewall components at an angle of 55°-75°; c. Laying the airtight layer and the release liner composite together, then laminating and pressing the release liner, tire carcass, tire carcass upper film, and steel wire bead bonding components; d. Laying the gasket components, with the gasket component joints being butt-fitted, and the distance between the gasket component joint and the airtight layer / release liner composite joint being 60°-90°; laminating and pressing the protective rubber, shaping rubber, and other components; finally, laminating the sidewall components, with the sidewall component joints being butt-fitted; e. Marking the corresponding inner tire positions of the gasket component joints, the airtight layer / release liner composite joints, and the sidewall component joints on the tire after lamination; then shaping, pressing, tire winding, tire removal, and tire vulcanization of the tire carcass.

Description

Technical Field

[0001] This invention relates to the field of tire manufacturing, and more specifically to a process and testing method for improving the sidewall bulging of engineering machinery tires. Background Technology

[0002] As is well known, bulging is prone to occur on the sidewalls of construction machinery tires during the production process, and the industry currently lacks methods for process control and finished product inspection of bulging issues on the sidewalls of construction machinery tires. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a process for improving the sidewall bulging of engineering machinery tires, which can effectively identify and control abnormal sidewall bulging of engineering tires.

[0004] The technical solution adopted by this invention to solve its technical problem is: a process for improving the sidewall bulging of engineering machinery tires, characterized by including the following steps: a. butting the joints of the airtight layer and the release liner composite, and then compacting them; b. cutting the sidewall components at an angle of 55°-75°; c. bonding the airtight layer and the release liner composite, and then bonding and pressing the release liner, tire carcass, tire carcass upper film, and steel wire bead bonding components; d. bonding the gasket components, wherein the bonding joint of the gasket components is butt-jointed, and the gasket... The distance between the rubber component joint and the airtight layer and the isolation rubber composite component joint is 60°-90°. The protective rubber, shaping rubber and other components are then bonded and pressed together. Finally, the tire sidewall components are bonded together. The tire sidewall component joints are butt joints, and the distribution angle between the tire sidewall component joint and the pad rubber component joint is 90°-180°. After bonding, the tire body is marked with the corresponding positions of the pad rubber component joint, the airtight layer isolation rubber composite component joint and the tire sidewall component joint. Then, the tire body is shaped, pressed, wound, unloaded and vulcanized.

[0005] The cutting angle of the joint portion of the composite component is 20-25°.

[0006] The spacing between the joints of the gasket, the airtight layer isolation adhesive composite and the tire sidewall components is all greater than 30 degrees.

[0007] A method for detecting sidewall bulging in engineering machinery tires, characterized by the following steps: After vulcanization, the RigelScan intelligent handheld laser 3D scanner is first used to scan the actual contour curves of the joint of the rubber pad component and the joint of the tire sidewall component; then, the actual thickness is scanned at 180° on the opposite contour curves, and the scanned contour dimensions are measured, compared, and judged; finally, the actual scanned contour curves are compared and measured with the designed contour curves in CAD, and tires with a maximum thickness difference exceeding the technical control tolerance are identified, recorded, and judged according to technical standards.

[0008] The beneficial effect of this invention is that by adding a detection step for the sidewall thickness curve of the finished tire, it can effectively identify and control abnormal material distribution in the sidewall area, and prevent abnormal quality problems such as bulging in the sidewall area. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] Figure 1 A schematic diagram of the joint method of the airtight layer and the insulating adhesive composite of the present invention.

[0011] Figure 2 A schematic diagram of the cutting angle of the tire sidewall component of this invention.

[0012] Figure 3 A schematic diagram of the tire sidewall portion of this invention.

[0013] Figure 4 Schematic diagram of tire sidewall curve detection in this invention Detailed Implementation

[0014] Example

[0015] 1. Connect the joints of the airtight layer and the release liner composite, with the cut angle of the joint area of ​​the airtight layer and the release liner composite being 25°, and then compact it after connection.

[0016] 2. Then cut the sidewall components, with the cutting angle being 75° between the cutting line and the center line of the component's length direction.

[0017] 3. Apply the airtight layer and release liner composite, then apply and press the release liner, tire carcass, tire carcass upper film, and bead bonding components. Apply the gasket components, ensuring the gasket component joints are butt-fitted and 90° away from the airtight layer and release liner composite joints. Next, apply and press the protective rubber and shaping rubber components. Finally, apply the sidewall components, ensuring the sidewall component joints are butt-fitted and 180° away from the gasket component joints (Note: The final spacing between the gasket, airtight layer, and release liner composite joints, and the sidewall component joints is >30 degrees). After application, mark the corresponding positions on the tire inner tube of the gasket component joints, airtight layer, and sidewall component joints as: Ja, Jb, Jc (Note: the other side is marked as: Ja*, Jb*, Jc*). Then the tire tube is shaped, pressed, wrapped with the tire embryo, removed, and vulcanized.

[0018] 4. After vulcanization, the finished tire undergoes edge repair. Then, the RigelScan intelligent handheld laser 3D scanner is used to scan the actual contour curves of the rubber pad joint and the tire sidewall joint. Next, the actual thickness is scanned at 180° on each side of the contour curve (Note: three scenarios may occur after scanning: Scenario 1: bulge on the outer side of the tire; Scenario 2: bulge on the inner side of the tire; Scenario 3: no bulge). The dimensions of the scanned contours are measured, compared, and judged. Tires exceeding the standard are then marked and downgraded.

[0019] 5. Then, compare and measure the actual scanned contour curve with the design contour curve in CAD. Identify and record tires whose maximum thickness difference exceeds the technical control tolerance, and judge them according to technical standards.

[0020] Example

[0021] 1. Connect the joints of the airtight layer and the release liner composite, with the cut angle of the joint area of ​​the airtight layer and the release liner composite being 20°, and then compact it after connection.

[0022] 2. Then cut the sidewall components, with the cutting angle being 55° between the cutting line and the center line of the component's length direction.

[0023] 3. Apply the airtight layer and release liner composite components, then apply and press the release liner, tire carcass, tire carcass upper film, and steel wire bead bonding components. Apply the gasket components, ensuring the gasket component joints are butt-fitted and 60° away from the airtight layer and release liner composite component joints. Next, apply and press the protective rubber and shaping rubber components. Finally, apply the sidewall components, ensuring the sidewall component joints are butt-fitted and 90° away from the gasket component joints (Note: The final distance between the gasket, airtight layer, and release liner composite component joints and the sidewall component joints is >30 degrees). After bonding, mark the corresponding positions of the gasket component joints, airtight layer and release liner composite component joints, and sidewall component joints on the tire box as: Ja, Jb, Jc (Note: the other side is marked as: Ja*, Jb*, Jc*). Then the tire tube is shaped, pressed, wrapped with the tire embryo, removed, and vulcanized.

[0024] Example

[0025] 1. Connect the joints of the airtight layer and the release adhesive composite, with the cut angle of the joint area of ​​the airtight layer and the release adhesive composite being 22°, and then compact it after connection.

[0026] 2. Then cut the sidewall components, with the cutting angle being 65° between the cutting line and the center line of the component's length direction.

[0027] 3. Apply the airtight layer and release liner composite, then apply and press the release liner, tire carcass, tire carcass upper film, and steel wire bead bonding components. Apply the gasket components, ensuring the gasket component joints are butt-fitted and 70° away from the airtight layer and release liner composite joints. Next, apply and press the protective rubber and shaping rubber components. Finally, apply the sidewall components, ensuring the sidewall component joints are butt-fitted and 95° away from the gasket component joints (Note: The final distance between the gasket, airtight layer, and release liner composite joints and the sidewall component joints is >30 degrees). After bonding, mark the corresponding positions of the gasket component joints, airtight layer and release liner composite joints, and sidewall component joints on the tire box as: Ja, Jb, Jc (Note: the other side is marked as: Ja*, Jb*, Jc*). Then the tire tube is shaped, pressed, wrapped with the tire embryo, removed, and vulcanized.

Claims

1. A process for improving sidewall bulging in engineering machinery tires, characterized in that, The process includes the following steps: a. Butt-fitting the joints of the airtight layer and the release liner composite, and then compacting them; b. Cutting the sidewall components at an angle of 55°-75°; c. Laying the airtight layer and the release liner composite, and then laminating and pressing the release liner, tire carcass, tire carcass upper film, and steel wire bead bonding components; d. Laying the gasket components, with the gasket component bonding joints being butt-fitting, and laminating and pressing the protective rubber and shaping rubber components; finally, laminating the sidewall components, with the sidewall component joints being butt-fitting; e. Marking the corresponding tire inner positions of the gasket component joints, airtight layer and release liner composite joints, and sidewall component joints on the tire after lamination, and then shaping, pressing, tire wrapping, tire removal, and tire vulcanization of the tire.

2. The process for improving the sidewall bulging of engineering machinery tires according to claim 1, characterized in that... The cutting angle of the joint portion of the composite component is 20-25°.

3. The process for improving the sidewall bulging of engineering machinery tires according to claim 1, characterized in that... The angle between the tire sidewall component joint and the gasket component joint is 90°-180°.

4. The process for improving the sidewall bulging of engineering machinery tires according to claim 1, characterized in that... The spacing between the joints of the gasket, the airtight layer isolation adhesive composite and the tire sidewall components is all greater than 30 degrees.

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