Steel tire vulcanization mold capable of reducing rubber edges

Abstract

The utility model provides a steel tire vulcanizing mold capable of reducing rubber edges, which belongs to the technical field of tire vulcanizing molds and comprises a mold shell component and a cavity component, the cavity component is mounted in the mold shell component and used for molding patterns on the surface of a tire, and the cavity component comprises a plurality of pattern blocks and two tire side plates. The pattern blocks are arranged in the circumferential direction to form an annular structure, the annular structure is provided with openings in the two end faces in the axial direction, and the two tire side plates are arranged at an upper opening and a lower opening of the annular structure respectively. Sections are arranged between the pattern blocks and the sidewall plates, and the thermal expansion coefficients of the pattern blocks and the sidewall plates are smaller than the thermal expansion coefficients of the sections; when the tire is vulcanized, the sections are heated and expanded to eliminate the circular seam gap, and the rubber material cannot enter the circular seam gap, so that the problem that rubber edges exist on the surface after the tire is vulcanized is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire vulcanization molds, and particularly relates to a steel tire vulcanization mold capable of reducing rubber edges. Background Art

[0002] The tire flexible mold consists of a shell assembly and a cavity assembly. The cavity assembly is installed within the shell assembly and is used to mold the tire surface pattern. The cavity assembly includes multiple tread blocks, an upper sidewall plate, and a lower sidewall plate. The tread blocks are arranged circumferentially in an annular structure. The annular structure is open at both axial ends. The upper sidewall plate is located at the upper opening of the annular structure, and the lower sidewall plate is located at the lower opening of the annular structure.

[0003] The clearance between the tread block diameter and the outer diameter of the sidewall assembly forms a circular gap. This gap is generally required to be less than or equal to 0.05mm. Theoretically, no rubber edge will appear during tire vulcanization. However, in reality, vulcanizers and molds can experience installation precision errors, deformation, and other issues, resulting in the circular gap not meeting the preset requirements. Rubber can enter the gap, forming a rubber edge on the tire surface, necessitating subsequent rubber tapping. In severe cases, the tire may even be scrapped. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a steel tire vulcanization mold capable of reducing rubber edges, comprising a mold shell assembly and a cavity assembly. The cavity assembly is installed in the mold shell assembly and is used to mold the pattern on the tire surface. The utility model is characterized in that the cavity component includes a plurality of pattern blocks and two sidewalls. The plurality of pattern blocks are arranged in an annular structure along the circumferential direction. The annular structure is provided with openings at two end surfaces along the axial direction. The two sidewalls are respectively provided at the upper opening and the lower opening of the annular structure.

[0005] A section is provided between the pattern block and the tire side plate, and the thermal expansion coefficient of the pattern block and the tire side plate is smaller than the thermal expansion coefficient of the section.

[0006] Furthermore, a plurality of segments are provided, and the plurality of segments can be spliced ​​into a ring along the circumferential direction, and the upper diameter and the lower diameter of each pattern block are both installed with segments.

[0007] Furthermore, the side surfaces of the segments are flush with the side surfaces of the pattern blocks.

[0008] Furthermore, a plurality of segments are provided, and the plurality of segments can be spliced ​​into a ring along the circumferential direction, and the plurality of segments are installed on the assembly outer circle of the tire side plate.

[0009] Furthermore, the outer circle of the tire side plate is provided with a mounting ring groove, and one end of the section is provided with a boss, which is embedded in the mounting ring groove.

[0010] Furthermore, the section is provided with a countersunk hole, and the connecting screw passes through the countersunk hole and is threadedly connected to the tire side plate.

[0011] Furthermore, there are 2-4 sections.

[0012] Furthermore, the thickness of the segment is 10-30 mm.

[0013] Furthermore, the mold shell assembly includes a guide ring, an upper cover, a base and a slider. The inner sides of the upper cover and the base are fixedly mounted with sidewalls, the tread blocks are fixedly mounted on the inner side of the slider, and the slider is slidably arranged on the inner side wall of the guide ring.

[0014] Furthermore, the material of the tread blocks and the sidewalls is steel, and the material of the segments is aluminum alloy.

[0015] The technical solution provided by the utility model has the following advantages compared with the prior art:

[0016] A section is provided between the mold pattern block and the side plate. When the tire is vulcanized, the thermal expansion coefficient of the section is greater than that of the pattern block and the side plate. The thermal expansion of the section eliminates the annular gap, and the rubber material will not enter the annular gap, thus solving the problem of rubber edge on the surface of the tire after vulcanization is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the tire mold of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the tire mold cavity assembly of the utility model;

[0020] Figure 3 yes Figure 2 Enlarged view of point A.

[0021] Description of reference numerals:

[0022] 1-guide ring, 2-upper cover, 3-base, 4-slider, 5-tread block, 6-upper side plate, 7-lower side plate, 8-upper section, 9-lower section, 10-connecting screw, 11-mounting ring groove, 12-sink hole. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Please refer to Figure 1-Figure 3 In order to solve the above technical problems, the utility model provides a steel tire vulcanization mold that can reduce rubber edges, including a mold shell component and a cavity component. The cavity component is installed in the mold shell component and is used to mold the pattern on the tire surface.

[0029] The mold can be a flexible mold. The mold shell assembly includes a guide ring 1, an upper cover 2, a base 3, and a slider 4. The cavity assembly includes multiple tread blocks 5, an upper tire side plate 6, and a lower tire side plate 7. The multiple tread blocks 5 are arranged circumferentially into an annular structure. The annular structure is provided with two axial end openings. The upper tire side plate 6 is provided at the upper opening of the annular structure, and the lower tire side plate 7 is provided at the lower opening of the annular structure. The upper tire side plate 6 and the lower tire side plate 7 are both annular plate structures that fit into the upper and lower openings of the annular structure. The upper tire side plate 6 is fixedly mounted on the inner side of the upper cover 2, the lower tire side plate 7 is fixedly mounted on the inner side of the base 3, the tread blocks 5 are fixedly mounted on the inner side of the slider 4, and the slider 4 is slidably mounted on the inner side wall of the guide ring 1.

[0030] A section is provided between the tread block 5 and the side plate, and the thermal expansion coefficients of the tread block 5 and the side plate are smaller than the thermal expansion coefficient of the section. Preferably, the tread block 5 and the side plate are made of steel, and the section is made of aluminum alloy. Specifically, the tread block 5 and the side plate can be made of 35# steel, and the section can be made of 6061-T6. When the tire is vulcanized, the mold temperature rises to 200-240°C. Since the thermal expansion coefficient of aluminum alloy is greater than that of steel, the thermal expansion coefficient of the section is greater than that of the tread block 5 and the side plate. The thermal expansion of the section eliminates the annular gap, and the rubber material does not enter the annular gap, thus solving the problem of rubber edges on the surface of the tire after vulcanization.

[0031] In an optional embodiment, the segments include an upper segment 8 and a lower segment 9, with multiple upper segments 8 and multiple lower segments 9 being provided. Multiple upper segments 8 can be spliced ​​circumferentially into a ring, with an upper segment 8 mounted on the upper diameter of each tread block 5. Multiple lower segments 9 can be spliced ​​circumferentially into a ring, with a lower segment 9 mounted on the lower diameter of each tread block 5. The side surfaces of the upper and lower segments 8 and 9 are flush with the side surfaces of the tread block 5. After the tire mold is closed, the multiple upper and lower segments 8 and 9 are spliced ​​together to form two upper and lower rings following the tread block 5. The side of the upper segment 8 facing the upper sideplate 6 abuts against the upper sideplate 6, and the side of the lower segment 9 facing the lower sideplate 7 abuts against the lower sideplate 7. The number of upper segments 8 and lower segments 9 is the same as the number of tread blocks 5.

[0032] In another optional embodiment, the segments include an upper segment 8 and a lower segment 9, and multiple upper segments 8 and lower segments 9 are provided. Multiple upper segments 8 are spliced ​​together in a ring along the circumferential direction, and multiple upper segments 8 are installed on the outer assembly circle of the upper tire side plate 6. Adjacent segments are spliced ​​end to end to form a ring. Multiple lower segments 9 are spliced ​​together in a ring along the circumferential direction, and multiple lower segments 9 are installed on the outer assembly circle of the lower tire side plate 7. Adjacent segments are spliced ​​end to end to form a ring. After the tire mold is closed, the side of the upper segment 8 facing the pattern block 5 abuts against the upper diameter of the pattern block 5, and the side of the lower segment 9 facing the pattern block 5 abuts against the lower diameter of the pattern block 5. The number of upper segments 8 can be set to 2-4, and the number of lower segments 9 can be set to 2-4. Preferably, the segments are detachably mounted on the tire side plate to facilitate installation and fixation of the segments. The segments can be mounted on the sidewalls by fastening components such as connecting screws 10 , for example, on the end faces of the sidewalls, or on the outer assembly circle of the sidewalls.

[0033] Preferably, the outer circle of the tire side plate is provided with a mounting ring groove 11, and one end of the segment is provided with a boss, which is embedded in the mounting ring groove 11. The segment is further provided with a countersunk hole 12, and the connecting screw 10 passes through the countersunk hole 12 and is threadedly connected to the tire side plate.

[0034] In another optional embodiment, the segments include an upper segment 8 and a lower segment 9, each of which is provided with one upper segment 8 and one lower segment 9, and both the upper segment 8 and the lower segment 9 are circular rings, the upper segment 8 is mounted on the upper tire side plate 6 to assemble the outer circle, and the lower segment 9 is mounted on the lower tire side plate 7 to assemble the outer circle, and the segments are fixed by interference fit.

[0035] Preferably, the thickness of the segment is set to 10-30 mm to ensure that the annular gap can be eliminated after the segment is heated and expanded.

[0036] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A steel tire vulcanization mold capable of reducing rubber edges, comprising a mold shell assembly and a cavity assembly, wherein the cavity assembly is installed in the mold shell assembly and is used to mold the pattern on the tire surface, characterized in that: The cavity assembly comprises a plurality of pattern blocks (5) and two sidewall plates, wherein the plurality of pattern blocks (5) are arranged in a circumferential direction to form an annular structure, the annular structure is provided with two axial end surface openings, and the two sidewall plates are respectively provided at the upper opening and the lower opening of the annular structure; A section is provided between the pattern block (5) and the tire side plate, and the thermal expansion coefficients of the pattern block (5) and the tire side plate are smaller than the thermal expansion coefficient of the section.

2. A steel tire vulcanization mold capable of reducing rubber edge according to claim 1, characterized in that: A plurality of the sections are provided, and the plurality of sections can be spliced ​​into a ring along the circumferential direction, and the upper diameter and the lower diameter of each of the pattern blocks (5) are both equipped with the sections.

3. A steel tire vulcanization mold capable of reducing rubber edge according to claim 2, characterized in that: The side surface of the segment is flush with the side surface of the pattern block (5).

4. A steel tire vulcanization mold capable of reducing rubber edge according to claim 1, characterized in that: There are a plurality of segments, and the plurality of segments can be spliced ​​into a ring along the circumferential direction. The plurality of segments are installed on the assembly outer circle of the tire side plate.

5. A steel tire vulcanization mold capable of reducing rubber edge according to claim 4, characterized in that: The outer circle of the tire side plate is provided with a mounting annular groove (11), and one end of the section is provided with a boss, which is embedded in the mounting annular groove (11).

6. A steel tire vulcanization mold capable of reducing rubber edges according to claim 5, characterized in that: The section is provided with a countersunk hole (12), and the connecting screw (10) passes through the countersunk hole (12) and is threadedly connected to the tire side plate.

7. A steel tire vulcanization mold capable of reducing rubber edge according to claim 4, characterized in that: There are 2-4 sections.

8. The steel tire vulcanization mold capable of reducing rubber edge according to claim 1, characterized in that: The thickness of the section is 10-30 mm.

9. The steel tire vulcanization mold capable of reducing rubber edge according to claim 1, characterized in that: The mold shell assembly comprises a guide ring (1), an upper cover (2), a base (3) and a slider (4); the inner sides of the upper cover (2) and the base (3) are fixedly mounted with the tire side plates; the tread blocks (5) are fixedly mounted on the inner side of the slider (4); and the slider (4) is slidably arranged on the inner side wall of the guide ring (1).

10. The steel tire vulcanization mold capable of reducing rubber edge according to claim 1, characterized in that: The material of the pattern blocks (5) and the tire side plates is steel, and the material of the sections is aluminum alloy.

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