Steel ring and tire mold

Abstract

The utility model discloses a steel ring and a tire mold, and belongs to the technical field of tire molds, the steel ring comprises a steel ring body which is provided with a cavity surface and a peripheral surface matched with a side plate; an annular groove which is gradually reduced in the depth direction of the cavity surface is formed in the cavity surface; the expansion element comprises an expansion ring matched with the annular groove in shape, the expansion ring is embedded in the annular groove, a gap is formed between the expansion ring and the bottom face of the annular groove, and a tensioning part capable of driving the expansion ring to move in the depth direction of the annular groove is arranged on the expansion ring. When the expansion ring moves in the depth direction of the annular groove, the expansion ring can make the side wall face, close to the peripheral face, of the annular groove expand outwards or have the trend of expanding outwards. The tensioning part can drive the expansion ring to move in the depth direction of the annular groove, the side wall face, close to the outer circumferential face, of the annular groove and the outer circumferential face can expand outwards, a gap at the assembly position of the steel ring and the side plate can be rapidly adjusted, and the defect of vulcanized rubber edges is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tire molds, in particular to a steel ring and a tire mold. Background Art

[0002] During the vulcanization process of the tire embryo, the gap between the steel rim and the side panel is in direct contact with the tire embryo to be vulcanized. In order to prevent defects such as rubber leakage and rubber edge from occurring in the gap between the steel rim and the side panel, which would affect the appearance quality of the tire, at present, the machining and assembly accuracy requirements for the steel rim and the side panel are very high, and the gap size between the steel rim and the side panel cannot be adjusted. In particular, when the steel rim is worn, the gap between the steel rim and the side panel becomes larger, and the worn steel rim can basically not be repaired, which has an adverse effect on the factory's production and processing efficiency.

[0003] Therefore, developing and designing a steel rim and tire mold that can effectively adjust the gap between the steel rim and the side panel assembly, avoid tire vulcanization rubber edge, reduce the chance of tire repair, and reduce processing costs is a problem that needs to be solved urgently at this stage. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a steel rim and a tire mold. The cavity surface of the steel rim body is provided with an annular groove arranged close to the outer peripheral surface. The width of the annular groove gradually decreases along its depth direction. The expansion ring is embedded in the annular groove. When the tensioning part drives the expansion ring to move along the depth direction of the annular groove, the side wall surface of the annular groove close to the outer peripheral surface and the outer peripheral surface can be expanded outward, so that the gap between the steel rim and the side plate assembly can be adjusted conveniently and quickly, avoiding the defects of the vulcanized rubber edge, reducing the probability of tire rework and reducing the processing cost.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] In one aspect, the utility model provides a steel ring, comprising:

[0007] A steel ring body, wherein the steel ring body has a cavity surface and an outer peripheral surface matching the side plate; the cavity surface is provided with an annular groove arranged close to the outer peripheral surface; the width of the annular groove gradually decreases along its depth direction;

[0008] An expansion element, the expansion element comprises an expansion ring matching the shape of the annular groove, the expansion ring is embedded in the annular groove, the exposed surface of the expansion ring is flush with the cavity surface; there is a gap between the expansion ring and the bottom surface of the annular groove, and the expansion ring is provided with a tensioning portion capable of driving it to move along the depth direction of the annular groove; when the expansion ring moves in the depth direction of the annular groove, the expansion ring can cause the side wall surface of the annular groove close to the outer peripheral surface to expand outward or have a tendency to expand outward.

[0009] As a preferred technical solution, the tightening part is configured as a tightening screw, and a threaded hole is provided on the side of the expansion ring facing the bottom surface of the annular groove; a tightening hole connected to the bottom surface of the annular groove is provided on the steel ring body, and the tightening screw passes through the tightening hole and is threadedly connected to the threaded hole.

[0010] As a preferred technical solution, the outer peripheral surface is inclined relative to the axis of the steel ring body; the outer peripheral surface is inclined inwardly in a direction away from the cavity surface;

[0011] And / or, the side wall surface of the annular groove close to the outer peripheral surface is inclined relative to the axis of the steel ring body; the side wall surface of the annular groove close to the outer peripheral surface is inclined inwardly in a direction away from the cavity surface.

[0012] As a preferred technical solution, the minimum distance between the side wall surface of the annular groove close to the outer peripheral surface and the outer peripheral surface is set to 1-20 mm.

[0013] As a preferred technical solution, the minimum distance between the side wall surface of the annular groove close to the outer peripheral surface and the outer peripheral surface is set to 2-10 mm;

[0014] And / or, the side wall surface of the annular groove close to the outer peripheral surface is arranged parallel to the outer peripheral surface;

[0015] And / or, the angle between the two opposite side walls of the annular groove is set to 10-20°;

[0016] And / or, the expansion ring is made of steel.

[0017] As a preferred technical solution, an elastic expansion body is provided between the expansion ring and the bottom surface of the annular groove, and the elastic expansion body abuts against the expansion ring and the bottom surface of the annular groove respectively.

[0018] As a preferred technical solution, the elastic expansion body is configured as a silicone rubber block.

[0019] As a preferred technical solution, the expansion ring is formed by sequentially splicing a number of arc-shaped sub-rings;

[0020] And / or, the tensioning portion is provided in plurality, and the plurality of tensioning portions are distributed along the circumference of the expansion ring;

[0021] And / or, the axes of the steel ring body, the annular groove and the expansion ring are all collinear.

[0022] As a preferred technical solution, an adjusting screw hole is provided on the steel ring body, and an adjusting screw threadedly connected to the adjusting screw hole is provided in the adjusting screw hole, and part of the adjusting screw extends out of the adjusting screw hole and abuts against the side plate; the annular groove is located between the outer peripheral surface and the adjusting screw.

[0023] In a second aspect, the utility model provides a tire mold, comprising the aforementioned steel ring.

[0024] The beneficial effects of the utility model are as follows:

[0025] 1. An annular groove arranged close to the outer peripheral surface is provided on the cavity surface of the steel ring body of the utility model, and the width of the annular groove gradually decreases along its depth direction. The expansion ring matches the shape of the annular groove and is embedded in the annular groove. When the tensioning part drives the expansion ring to move along the depth direction of the annular groove, the side wall of the expansion ring exerts force on the two side walls of the annular groove, which can make the side wall surface of the annular groove close to the outer peripheral surface and the outer peripheral surface expand outward or have a tendency to expand outward, thereby conveniently and quickly adjusting the gap between the steel ring and the side plate assembly, avoiding the defects of the vulcanized rubber edge, reducing the probability of tire rework, and reducing the processing cost.

[0026] 2. The elastic expansion body of the utility model is arranged between the expansion ring and the bottom surface of the annular groove. When the expansion ring moves in the depth direction of the annular groove, the elastic expansion body is compressed and can also provide a part of the expansion force, further promoting the outward expansion of the outer circumference of the steel ring body, thereby shortening the moving distance of the expansion ring and having less impact on the vulcanization quality.

[0027] 3. An adjusting screw is provided between the steel ring body and the side plate of the utility model. The inclination angle of the steel ring can be adjusted by adjusting the extension length of the adjusting screw. In combination with the expansion element, the gap size at the assembly point of the steel ring and the side plate can be more conveniently adjusted, effectively ensuring the vulcanization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a steel ring of the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the overall structure of the steel ring body;

[0030] Figure 3 for Figure 2 Magnified view of area A.

[0031] In the figure: 1- steel ring body, 11- cavity surface, 12- outer peripheral surface, 13- annular groove, 14- gap, 15- tightening hole, 16- adjusting screw hole, 2- expansion ring, 21- threaded hole, 3- tightening screw, 4- adjusting screw, 5- side plate. DETAILED DESCRIPTION

[0032] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0033] First, please refer to Figure 1-Figure 3 , is an embodiment of a steel ring provided by the utility model, comprising a steel ring body 1 and an expansion element, the steel ring body 1 having a cavity surface 11 and an outer peripheral surface 12 matching the side plate 5; the cavity surface 11 is provided with an annular groove 13 arranged close to the outer peripheral surface 12; the width of the annular groove 13 gradually decreases along its depth direction; the expansion element comprises an expansion ring 2 matching the shape of the annular groove 13, the expansion ring 2 is embedded in the annular groove 13, the exposed surface of the expansion ring 2 is flush with the cavity surface 11, and the expansion ring 2 is respectively aligned with the annular groove 13 The two side walls are in contact with each other; there is a gap 14 between the expansion ring 2 and the bottom surface of the annular groove 13, and the expansion ring 2 is provided with a tensioning part which can drive it to move along the depth direction of the annular groove 13; when the tensioning part drives the expansion ring 2 to move in the depth direction of the annular groove 13, the expansion ring 2 can make the side wall surface of the annular groove 13 close to the outer peripheral surface 12 expand outward or have a tendency to expand outward, thereby changing the inclination angle of the outer peripheral surface 12 of the steel ring body 1, and then conveniently and quickly adjusting the gap 14 at the assembly point of the steel ring body 1 and the side plate 5.

[0034] For clarification, please refer to Figure 1 Since the gap 14 between the steel ring body 1 and the side plate 5 generally only needs to be slightly adjusted, the movement distance of the expansion ring 2 relative to the annular groove 13 is very small and will not have an adverse effect on the vulcanization quality.

[0035] For further information, please refer to Figure 3 The angle α between the two opposite side walls of the annular groove 13 is preferably set to 10-20° to ensure that when the expansion ring 2 moves relative to the annular groove 13, the side wall surface of the annular groove 13 close to the outer peripheral surface 12 can be deformed; more preferably, the angle α is set to 15°.

[0036] Furthermore, an elastic expansion body can be arranged between the expansion ring 2 and the bottom surface of the annular groove 13, and the elastic expansion body abuts against the bottom surface of the expansion ring 2 and the annular groove 13 respectively. When the expansion ring 2 moves in the depth direction of the annular groove 13, the elastic expansion body is compressed and can also provide a part of the expansion force, further promoting the outward expansion of the outer peripheral surface 12 of the steel ring body 1, thereby shortening the moving distance of the expansion ring 2 and having less impact on the vulcanization quality; specifically, the elastic expansion body is preferably set to a silicone rubber block.

[0037] Specifically, the material of the expansion ring 2 is preferably steel, which has sufficient structural strength.

[0038] In this embodiment, please refer to Figure 1-Figure 3 The tightening part is set as a tightening screw 3, and a threaded hole 21 is provided on the side of the expansion ring 2 facing the bottom surface of the annular groove 13; a tightening hole 15 connected to the bottom surface of the annular groove 13 is provided on the steel ring body 1, and the tightening screw 3 passes through the tightening hole 15 and is threadedly connected with the threaded hole 21. By tightening the tightening screw 3, the expansion ring 2 can be driven to move in the depth direction of the annular groove 13.

[0039] For details, please refer to Figure 1-Figure 3 The outer peripheral surface 12 is preferably tilted relative to the axis of the steel ring body 1, and the outer peripheral surface 12 is tilted inwardly in a direction away from the cavity surface 11, so as to facilitate cooperation with the side plate 5; when the expansion element drives the side wall surface of the annular groove 13 close to the outer peripheral surface 12 to expand outward, the outer peripheral surface 12 expands outward accordingly, and the gap 14 at the assembly point of the steel ring body 1 and the side plate 5 can be accurately adjusted; similarly, the side wall surface of the annular groove 13 close to the outer peripheral surface 12 is also preferably tilted relative to the axis of the steel ring body 1; the side wall surface of the annular groove 13 close to the outer peripheral surface 12 is tilted inwardly in a direction away from the cavity surface 11; further, the side wall surface of the annular groove 13 close to the outer peripheral surface 12 is preferably parallel to the outer peripheral surface 12, and the outer peripheral surface 12 and the side wall surface of the annular groove 13 close to the outer peripheral surface 12 expand synchronously, which is convenient for processing and adjustment.

[0040] It should be noted that the minimum distance between the side wall surface of the annular groove 13 close to the outer peripheral surface 12 and the outer peripheral surface 12 is preferably set to 1-20 mm. When the expansion ring 2 moves, the outer peripheral surface 12 of the steel ring body 1 is easy to deform; more preferably, the minimum distance between the side wall surface of the annular groove 13 close to the outer peripheral surface 12 and the outer peripheral surface 12 is set to 2-10 mm. If the thickness between the side wall surface of the annular groove 13 close to the outer peripheral surface 12 and the outer peripheral surface 12 is too small, it will affect the strength of the steel ring body 1, and if the thickness is too large, it will make it difficult to adjust the inclination angle of the outer peripheral surface 12.

[0041] Furthermore, the axes of the steel ring body 1, the annular groove 13 and the expansion ring 2 should all be collinear, and a plurality of tensioning parts are provided, and the plurality of tensioning parts are evenly distributed along the circumference of the expansion ring 2, and each tensioning part can adjust the inclination of the outer peripheral surface 12 of the area near it; further, the expansion ring 2 is composed of a plurality of arc-shaped sub-rings spliced ​​in sequence, which is convenient for processing and installation, and can more easily adjust the inclination of the outer peripheral surface 12 of the steel ring body 1 in the corresponding area; in other embodiments, the expansion ring 2 can also be an integrally formed structure, so as to be able to accurately adjust the inclination of the outer peripheral surface 12 of the steel ring body 1.

[0042] In this embodiment, please refer to Figure 1 and Figure 2 An adjusting screw hole 16 is provided on the steel ring body 1, and an adjusting screw 4 threadedly connected to the adjusting screw hole 16 is provided in the adjusting screw hole 16, and part of the adjusting screw 4 extends out from the adjusting screw hole 16 and abuts against the side plate 5; the annular groove 13 is located between the outer peripheral surface 12 and the adjusting screw 4, and the inclination angle of the steel ring body 1 can be adjusted by adjusting the extending length of the adjusting screw 4, and the size of the gap 14 at the assembly point of the steel ring body 1 and the side plate 5 can be more conveniently adjusted in conjunction with the expansion element; specifically, the adjusting screws 4 are preferably set to 4-16 and are evenly distributed along the circumference of the steel ring body 1.

[0043] Second, please refer to Figure 1 The utility model provides an implementation of a tire mold, including the aforementioned steel rim. When the steel rim body 1 is worn, the size of the gap 14 at the assembly point of the steel rim body 1 and the side plate 5 can still be conveniently adjusted after repair; and when a vulcanized rubber edge appears, the size of the gap 14 at the assembly point of the steel rim body 1 and the side plate 5 can also be adjusted at any time without waiting for repair.

[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A steel ring, characterized in that: include: A steel ring body (1), the steel ring body (1) having a cavity surface (11) and an outer peripheral surface (12) matching the side plate (5); the cavity surface (11) is provided with an annular groove (13) arranged close to the outer peripheral surface (12); the width of the annular groove (13) gradually decreases along its depth direction; An expansion element, the expansion element comprising an expansion ring (2) whose shape matches that of the annular groove (13), the expansion ring (2) being embedded in the annular groove (13), the exposed surface of the expansion ring (2) being flush with the cavity surface (11); a gap (14) being provided between the expansion ring (2) and the bottom surface of the annular groove (13), the expansion ring (2) being provided with a tensioning portion capable of driving the expansion ring to move along the depth direction of the annular groove (13); when the expansion ring (2) moves in the depth direction of the annular groove (13), the expansion ring (2) can cause the side wall surface of the annular groove (13) close to the outer peripheral surface (12) to expand outward or have a tendency to expand outward.

2. A steel ring according to claim 1, characterized in that: The tightening part is configured as a tightening screw (3), and a threaded hole (21) is provided on the side surface of the expansion ring (2) facing the bottom surface of the annular groove (13); a tightening hole (15) connected to the bottom surface of the annular groove (13) is provided on the steel ring body (1), and the tightening screw (3) passes through the tightening hole (15) and is threadedly connected to the threaded hole (21).

3. A steel ring according to claim 1, characterized in that: The outer peripheral surface (12) is arranged to be inclined relative to the axis of the steel ring body (1); the outer peripheral surface (12) is inclined inwardly in a direction away from the cavity surface (11); And / or, the side wall surface of the annular groove (13) close to the outer peripheral surface (12) is inclined relative to the axis of the steel ring body (1); the side wall surface of the annular groove (13) close to the outer peripheral surface (12) is inclined inwardly in a direction away from the cavity surface (11).

4. A steel ring according to claim 3, characterized in that: The minimum distance between the side wall surface of the annular groove (13) close to the outer peripheral surface (12) and the outer peripheral surface (12) is set to 1-20 mm.

5. A steel ring according to claim 4, characterized in that: The minimum distance between the side wall surface of the annular groove (13) close to the outer peripheral surface (12) and the outer peripheral surface (12) is set to 2-10 mm; And / or, the side wall surface of the annular groove (13) close to the outer peripheral surface (12) is arranged parallel to the outer peripheral surface (12); And / or, the angle between the two opposite side walls of the annular groove (13) is set to 10-20°; And / or, the material of the expansion ring (2) is set to be steel.

6. A steel ring according to claim 1, characterized in that: An elastic expansion body is provided between the expansion ring (2) and the bottom surface of the annular groove (13), and the elastic expansion body abuts against the bottom surfaces of the expansion ring (2) and the annular groove (13) respectively.

7. A steel ring according to claim 6, characterized in that: The elastic expansion body is configured as a silicone rubber block.

8. The steel ring according to claim 1, characterized in that: The expansion ring (2) is formed by sequentially splicing a plurality of arc-shaped sub-rings; And / or, the tensioning portion is provided in plurality, and the plurality of tensioning portions are distributed along the circumference of the expansion ring (2); And / or, the axes of the steel ring body (1), the annular groove (13) and the expansion ring (2) are all collinear.

9. The steel ring according to claim 1, characterized in that: The steel ring body (1) is provided with an adjusting screw hole (16), and an adjusting screw (4) threadedly connected thereto is provided in the adjusting screw hole (16), and part of the adjusting screw (4) extends out of the adjusting screw hole (16) and abuts against the side plate (5); the annular groove (13) is located between the outer peripheral surface (12) and the adjusting screw (4).

10. A tire mold, characterized in that: It comprises a steel ring as described in any one of claims 1-9.

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