Method for improving winding quality of underground mine tire tread shoulder
Through the chamfered exhaust pressure roller and puncture projection design, combined with reasonable pressure and distance adjustment, and the use of engineering tire winding tread scanner, the problem of size and shape symmetry of the tread wrapping shoulder of the underground mine tire is solved. Ensures the improvement of tread winding quality and the uniformity of material distribution.
Patent Information
- Application Number
- CN202411391752.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-01-07
AI Technical Summary
The existing technology is difficult to effectively solve the size and shape symmetry and stability of the tread wrap shoulder of the L5/L5S series tire under underground mines, resulting in poor tread wrap quality, affecting the uniformity and compactness of tire material distribution.
By chamfering the inner side of the exhaust pressure rollers of #1, #5, #6 and #9, and setting a puncture projection on the 3# exhaust pressure rollers, adjusting the main cylinder and exhaust pressure rollers of the tread winding head of the main cylinder and exhaust pressure rollers of the tread winding head The pressure and distance of the tread wrap is used to verify the symmetry of the wound size and shape, and improve the fitting method of the tread wrap strips to ensure the flat fit of the rubber strips to eliminate bubbles and reduce discounts.
The size and shape symmetry of the tread wrap shoulders are improved, the compactness of the tread wrap strips is ensured, the uniform and dense distribution of tire materials is ensured, and the unevenness and bubble problems of tread wrap quality are solved.
Smart Images
Figure CN119261270A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tire production, and in particular to a method for improving the winding quality of the shoulder of a tread of an underground mine tire. Background Art
[0002] At present, since most of the all-steel tires used in underground mines are L5 / L5S series, the tire tread thickness is thicker than that of other products with the same specifications. In order to ensure the anti-cutting performance of the tire shoulder, the transition of the tire shoulder is generally designed to be steeper, which makes it difficult to implement the tread winding process during the tire molding production process. In addition, due to the influence of production equipment, process flow and other factors, there are often quality problems such as poor transition of the tread winding shoulder, rubbing of the rubber strip by the winding roller, folding of the tread winding strip edge, and loose lamination between the tread winding strip layers, which directly affect the product quality and easily lead to problems such as uneven distribution of tread rubber material and bubbles between layers of the finished tire, which leads to quality problems such as partial wear and early delamination failure during the use of the tire. Therefore, it is necessary to ensure the symmetry of the size and shape of the tire shoulder of the tread winding and the compactness of the tread winding strip, so as to ensure the uniformity and compactness of the tire material distribution. However, the industry currently has no obvious and effective solution to improve the size, shape, symmetry and stability of the tread wrapping shoulder of the L5 / L5S series tires for underground mines. Summary of the invention
[0003] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art, to provide a method for improving the winding quality of the tread shoulder of underground mine tires, and to creatively solve the problems of the size, shape symmetry and stability of the tread winding shoulder of the L5 / L5S series tires for underground mines, to ensure the symmetry of the size and shape of the tread-wrapped tire shoulder and the compactness of the tread winding rubber strip, thereby ensuring the uniformity and compactness of the tire material distribution.
[0004] The technical solution of the present invention is:
[0005] A method for improving the winding quality of the shoulder of an underground mine tire tread, (1) chamfering the inner sides of the 1# exhaust roller, the 5# exhaust roller, the 6# exhaust roller and the 9# exhaust roller, and providing a circle of puncture protrusions on the 3# exhaust roller;
[0006] (2) Control the main cylinder pressure of the tread winding machine head to 0.4-0.5MPa, the exhaust roller pressure to 0.3-0.4MPa, and adjust the distance between the large roller of the tread winding machine head and the tire blank to 30-50mm.
[0007] Preferably, in step (1), the chamfer radius is 6-8 mm.
[0008] Preferably, in step (1), the length of the puncture protrusion is 6-10 mm.
[0009] Preferably, the method further includes: (3) using an engineering tire winding tread scanner to verify the tread winding size and the symmetry of the left and right winding shapes.
[0010] Preferably, in step (3), the specific operations are:
[0011] 1) First, use an engineering tire winding tread scanner to measure the profile of the crown area of the tire before the tread is wound;
[0012] 2) Using an engineering tire winding tread scanner to measure the contour of the crown area of the green tire after the tread is wound;
[0013] 3) The tread winding size can be obtained by the difference in the profiles of the two measurements.
[0014] Preferably, the bonding form of the tread winding rubber strip on the tread winding machine head and the green tire is improved. When the tread winding rubber strip is bonded to the green tire, the flat side of the tread winding rubber strip is bonded to the green tire instead of the trapezoidal side. The flat surface of the tread winding rubber strip is bonded to the green tire, and the extrusion of the exhaust pressure roller can effectively eliminate the bubbles between the rubber strips and reduce the risk of folding the edges of the rubber strips, thereby avoiding the fluctuation of the tread winding rubber strip during the winding process, ensuring the symmetry of the tread winding thickness, the compactness of the rubber strip bonding, and the stability of the tread winding shape.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The present invention modifies the shape of the exhaust roller of the tread winding machine, and adopts different exhaust roller designs at different positions, so that when the tread is wound, it is conducive to the smooth swing of the tread winding machine head on the shoulder of the tire blank, ensuring the tread winding size. At the same time, the unique innovative puncture exhaust roller design of the present invention can synchronously puncture the tread winding rubber strip during tread winding, effectively eliminate the bubbles between the tread winding rubber strips, and ensure the compactness of the wound tread. In addition, the present invention reasonably optimizes the pressure distribution of the main cylinder of the tread winding machine head and the exhaust roller, optimizes the pressure matching, and ensures the extended length of the exhaust roller arm, which is not only conducive to the exhaust effect of the exhaust roller, but also can ensure the smooth swing of the tread winding machine head at the shoulder of the tire, ensuring the winding quality of the tread. The method of the present invention creatively solves the problems of the size, shape symmetry and stability of the tread winding shoulder of the L5 / L5S series tires of underground mines, ensures the symmetry of the size and shape of the tire shoulder of the tread winding, and the compactness of the tread winding rubber strip, thereby ensuring the uniformity and compactness of the tire material distribution. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic structural diagram of the 1-9# exhaust pressure roller of the present invention.
[0018] Figure 2 It is a side view of the 1-9# exhaust pressure roller of the present invention.
[0019] Figure 3 It is a front view of the 3# exhaust pressure roller of the present invention.
[0020] Figure 4 It is a schematic diagram of the tread winding machine head and the tire blank of the present invention.
[0021] Figure 5 It is a schematic diagram of the profile and difference of the crown area of the green tire before and after tread winding measured by the engineering tire winding tread scanner in the present invention.
[0022] In the figure, 1, 1# exhaust pressure roller; 2, 3# exhaust pressure roller; 201, puncture protrusion; 3, 5# exhaust pressure roller; 4, 6# exhaust pressure roller; 5, 9# exhaust pressure roller; 6, tread winding machine head; 601, large pressure roller; 7, tire blank; 8, tread winding rubber strip. DETAILED DESCRIPTION
[0023] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.
[0024] Example 1
[0025] This embodiment provides a method for improving the tread shoulder winding quality of underground mining tires:
[0026] (1) Figure 1-3 As shown, the inner sides of the 1# exhaust roller 1, the 5# exhaust roller 3, the 6# exhaust roller 4 and the 9# exhaust roller 5 are chamfered, with a chamfer radius of 6 mm, and a circle of puncture protrusions 201 with a length of 6 mm is set on the 3# exhaust roller 2;
[0027] (2) The main cylinder pressure of the tread winding machine head 6 is controlled by the solenoid valve to be 0.4 MPa, and the exhaust pressure roller pressure is 0.3 MPa, and Figure 4 As shown, the distance between the large pressure roller 601 of the tread winding machine head 6 and the tire blank 7 is adjusted to 30 mm; when the tread winding rubber strip 8 is attached to the tire blank 7, the flat side of the tread winding rubber strip is attached to the tire blank 7;
[0028] (3) Use an engineering tire winding tread scanner (Weihai Shuhe Intelligent Technology Co., Ltd.) to verify the tread winding size and the symmetry of the left and right winding shapes. The specific operations are as follows:
[0029] 1) If Figure 5 As shown, an engineering tire winding tread scanner is first used to measure the profile L1 of the crown portion of the tire blank 7 before the tread is wound;
[0030] 2) Using an engineering tire winding tread scanner to measure the contour L2 of the crown area of the tire blank 7 after the tread is wound;
[0031] 3) The tread winding size can be obtained by the profile difference ΔL between the two measurements.
[0032] Example 2
[0033] This embodiment provides a method for improving the tread shoulder winding quality of underground mining tires:
[0034] (1) Figure 1-3 As shown, the inner sides of the 1# exhaust roller 1, the 5# exhaust roller 3, the 6# exhaust roller 4 and the 9# exhaust roller 5 are chamfered, the chamfer radius is 8 mm, and a circle of puncture protrusions 201 with a length of 10 mm is set on the 3# exhaust roller 2;
[0035] (2) The main cylinder pressure of the tread winding machine head 6 is controlled by the solenoid valve to be 0.5 MPa, and the exhaust pressure roller pressure is 0.4 MPa, and Figure 4 As shown, the distance between the large pressure roller 601 of the tread winding machine head 6 and the tire blank 7 is adjusted to 50 mm; when the tread winding rubber strip 8 is attached to the tire blank 7, the flat side of the tread winding rubber strip is attached to the tire blank 7;
[0036] (3) Use an engineering tire winding tread scanner to verify the tread winding size and the symmetry of the left and right winding shapes. The specific operations are as follows:
[0037] 1) If Figure 5 As shown, an engineering tire winding tread scanner is first used to measure the profile L1 of the crown portion of the tire blank 7 before the tread is wound;
[0038] 2) Using an engineering tire winding tread scanner to measure the contour L2 of the crown area of the tire blank 7 after the tread is wound;
[0039] 3) The tread winding size can be obtained by the profile difference ΔL between the two measurements.
[0040] Example 3
[0041] This embodiment provides a method for improving the tread shoulder winding quality of underground mining tires:
[0042] (1) Figure 1-3 As shown, the inner sides of the 1# exhaust roller 1, the 5# exhaust roller 3, the 6# exhaust roller 4 and the 9# exhaust roller 5 are chamfered, the chamfer radius is 7 mm, and a circle of puncture protrusions 201 with a length of 8 mm is set on the 3# exhaust roller 2;
[0043] (2) The main cylinder pressure of the tread winding machine head 6 is controlled by the solenoid valve to be 0.45 MPa, and the exhaust pressure roller pressure is 0.35 MPa, and Figure 4 As shown, the distance between the large pressure roller 601 of the tread winding machine head 6 and the tire blank 7 is adjusted to 40 mm; when the tread winding rubber strip 8 is attached to the tire blank 7, the flat side of the tread winding rubber strip 8 is attached to the tire blank 7;
[0044] (3) Use an engineering tire winding tread scanner to verify the tread winding size and the symmetry of the left and right winding shapes. The specific operations are as follows:
[0045] 1) If Figure 5 As shown, an engineering tire winding tread scanner is first used to measure the profile L1 of the crown portion of the tire blank 7 before the tread is wound;
[0046] 2) Using an engineering tire winding tread scanner to measure the contour L2 of the crown area of the tire blank 7 after the tread is wound;
[0047] 3) The tread winding size can be obtained by the profile difference ΔL between the two measurements.
[0048] Comparative Example 1
[0049] The difference from Example 1 is that the process improvement treatments of steps (1) and (3) are not performed; at the same time, in step (2), the main cylinder pressure of the tread winding head 6 is controlled to be 0.3MPa, the exhaust roller pressure is controlled to be 0.25MPa by the solenoid valve, and the distance between the large roller 601 of the tread winding head 6 and the tire blank 7 is adjusted to 20mm; when the tread winding strip 8 is bonded to the tire blank 7, the trapezoidal side of the tread winding strip 8 is bonded to the tire blank 7.
[0050] Comparative Example 2
[0051] The difference from Example 1 is that the process improvement treatment of step (1) is not performed.
[0052] Comparative Example 3
[0053] The difference from Example 1 is that in step (2), the main cylinder pressure of the tread winding head 6 is controlled to be 0.3MPa, the exhaust roller pressure is controlled to be 0.25MPa by the solenoid valve, and the distance between the large pressure roller 601 of the tread winding head 6 and the tire blank 7 is adjusted to 70mm; when the tread winding strip 8 is bonded to the tire blank 7, one side of the trapezoidal tread winding strip 8 is bonded to the tire blank 7.
[0054] The thickness of the shoulder of the tire wrapped tread of Examples 1-3 and Comparative Examples 1-3 was measured, and the measurement results are shown in Table 1:
[0055] Table 1 Measurement results of shoulder thickness of tire wrapped tread of Examples 1-3 and Comparative Examples 1-3
[0056]
[0057] It can be seen from Table 1 that in Examples 1-3 of the present invention, since the inner side of the edge exhaust sub-roller of the tread winding head 6 is chamfered, the puncture protrusion 201 structure of the 3# exhaust pressure roller 2 is added, and the pressure of the main cylinder and the exhaust pressure roller is reasonably matched, the distance between the tread winding head 6 and the tire blank 7 is optimized, so that the tread winding head 6 can swing and climb the shoulder part of the tire where the tire blank 7 is wrapped more smoothly, and the reasonable arrangement of the rubber strip in the shoulder part of the tire is ensured, thereby ensuring the shape and size symmetry of the shoulders on both sides.
[0058] In Comparative Example 1, due to the unreasonable pressure matching between the main cylinder and the exhaust roller, the distance between the tread winding machine head 6 and the tire blank 7 is small, resulting in the tread winding machine head 6 scratching the tire blank 7 and the rubber strip being folded during the swinging process at the shoulder part, affecting the rubber strip arrangement and material distribution at the shoulder part, resulting in the problem of poor symmetry of the shape and size of the shoulders on both sides. At the same time, Comparative Example 1 did not perform chamfering on the edge exhaust roller, nor did it design the puncture protrusion 201 structure for the 3# exhaust roller 2, resulting in the tread winding machine head 6 scratching the rubber strip and the swinging is not smooth, resulting in abnormal arrangement of the rubber strip at the shoulder, affecting the material distribution at the shoulder. In addition, Comparative Example 1 did not use an engineering tire winding tread scanner, which requires the winding tread to be stripped off the tire blank 7 to verify the size. Doing so will cause the winding tread size to deform during the tread stripping process, and cause unnecessary waste of rubber materials and equipment time.
[0059] In Comparative Example 2, since the exhaust pressure roller is not chamfered and the puncture protrusion 201 is not provided on the 3# exhaust pressure roller 2, the exhaust pressure roller scratches the rubber strip and the rubber strip is folded, and the exhaust pressure roller is stuck with the rubber strip when the tread winding head 6 swings and climbs in the shoulder area of the tire where the tire blank 7 is wound. This affects the arrangement of the rubber strip and the distribution of materials in the shoulder area, resulting in poor symmetry in the shape and size of the shoulders on both sides.
[0060] In Comparative Example 3, due to the unreasonable pressure matching between the main cylinder and the exhaust pressure roller, the distance between the tread winding head 6 and the tire blank 7 is large, and the support arm of the exhaust pressure roller extends too long, resulting in the exhaust pressure roller scratching the rubber strip and breaking the rubber strip, and the exhaust pressure roller getting stuck in the wound tread when the tread winding head 6 swings and climbs in the shoulder area of the tire blank 7. This affects the arrangement of the rubber strips and the distribution of materials in the shoulder area, resulting in poor symmetry in the shape and size of the shoulders on both sides.
Claims
1. A method for improving the tread shoulder winding quality of underground mining tires, characterized in that: (1) chamfering the inner sides of the 1# exhaust pressure roller (1), the 5# exhaust pressure roller (3), the 6# exhaust pressure roller (4) and the 9# exhaust pressure roller (5), and providing a circle of puncture protrusions (201) on the 3# exhaust pressure roller (2); (2) The main cylinder pressure of the tread winding machine head (6) is controlled to be 0.4-0.5 MPa, the exhaust pressure roller pressure is controlled to be 0.3-0.4 MPa, and the distance between the large pressure roller (601) of the tread winding machine head (6) and the tire blank (7) is adjusted to be 30-50 mm.
2. The method for improving the tread shoulder winding quality of underground mining tires according to claim 1, characterized in that: In step (1), the chamfer radius is 6-8 mm.
3. The method for improving the tread shoulder winding quality of underground mining tires according to claim 1, characterized in that: In step (1), the length of the puncture protrusion (201) is 6-10 mm.
4. The method for improving the tread shoulder winding quality of underground mining tires according to claim 1, characterized in that: Also includes: (3) Use an engineering tire winding tread scanner to verify the tread winding size and the symmetry of the left and right winding shapes.
5. The method for improving the tread shoulder winding quality of underground mining tires according to claim 4, characterized in that: In step (3), the specific operations are: 1) firstly using an engineering tire winding tread scanner to measure the contour of the crown area of the tire blank (7) before the tread is wound; 2) using an engineering tire winding tread scanner to measure the contour of the crown area of the tire blank (7) after the tread is wound; 3) The tread winding size can be obtained by the difference in the profiles of the two measurements.
6. The method for improving the tread shoulder winding quality of underground mining tires according to claim 1, characterized in that: When the tread wrapping rubber strip (8) is attached to the tire blank (7), one side of the plane of the tread wrapping rubber strip (8) is attached to the tire blank.