Rigid inner mold for tire vulcanization

Abstract

The utility model discloses a rigid inner mold for tire vulcanization, which belongs to the technical field of tire vulcanization equipment and comprises a plurality of large inner molds and a plurality of small inner molds which are alternately arranged in the circumferential direction, and grease storage grooves are arranged on opposite friction surfaces between the adjacent large inner molds and small inner molds. The grease storage tank is arranged on the large inner mold and / or the small inner mold; and a lubricating medium is arranged in the grease storage tank. According to the utility model, the structure for improving the wear resistance of the surface is additionally arranged on the relative friction surface of the rigid inner mold, so that the wear resistance of the relative friction surface is improved in the use process of the rigid inner mold, and the rigid inner mold keeps higher precision all the time in the use process, thereby prolonging the service life and improving the long-term use precision of the rigid inner mold; and the molding precision and performance of the tire are further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of tire vulcanization equipment, in particular to a rigid inner mold for tire vulcanization. Background Art

[0002] In recent years, tire molds have developed a technology that uses a rigid inner mold to shape the inner surface of the tire. This technology uses a rigid inner mold instead of a bladder to shape the inner contour of the tire and vulcanize it. The rigid inner mold is designed to be divided into large and small blocks. The tire is placed and vulcanized by closing and opening the large and small blocks. When placing the tire, the large and small blocks are all retracted inward until the tire can be placed in; after the tire is placed, the large and small blocks of the inner mold are opened, the inner side of the tire is close to the inner mold contour, the inner mold opens the tire, and after the outer mold is closed, the tire vulcanization process is completed under the joint action of the inner and outer molds.

[0003] The tires vulcanized by this technology have the characteristics of high molding precision and excellent tire performance. However, during the opening and closing process of the inner mold blocks, the vertical seams of the inner mold blocks will have relative movement. During the movement, since the inner mold is restrained by the tire outside, if the inner mold wants to open to the correct position, it needs to overcome the tire restraint to complete the process. Therefore, the vertical seams of the inner mold will move relative to each other under a large contact pressure. If the vertical seam surfaces of the inner mold are not treated with certain wear-resistant measures, these relative friction surfaces will wear out in a short time, affecting the use accuracy of the inner mold and thus affecting the performance of the tire.

[0004] At present, the existing solution is to embed wear-resistant plates in the vertical seams of the inner mold to improve the wear resistance of the inner mold. However, this method requires the wear-resistant plates embedded in the vertical seams to be installed on the inner mold before matching the car to ensure that the contour of the wear-resistant plate cavity is consistent with the contour of the inner mold cavity. This method of wear-resistant plate processing is more difficult. In addition, the wear-resistant plate will wear out after long-term use. After the wear-resistant plate is worn, it will still affect the roundness of the inner mold, thereby affecting the performance of the vulcanized tire.

[0005] In view of the above problems in the prior art, the utility model designs and manufactures a rigid inner mold for tire vulcanization to overcome the above defects. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the utility model provides a rigid inner mold for tire vulcanization. By adding a structure for improving the surface wear resistance of the relative friction surface of the rigid inner mold, the wear resistance of the relative friction surface of the rigid inner mold is improved during use, so that the rigid inner mold can always maintain a high precision during use, thereby improving the service life and long-term use accuracy of the rigid inner mold, and further ensuring the molding accuracy and performance of the tire.

[0007] In order to achieve the above-mentioned object, the technical solution adopted by the utility model is as follows: a rigid inner mold for tire vulcanization, comprising a plurality of large inner molds and a plurality of small inner molds arranged alternately in the circumferential direction, a grease storage groove is provided on the relative friction surface between adjacent large inner molds and small inner molds, and the grease storage groove is arranged on the large inner mold and / or the small inner mold;

[0008] The grease storage tank is provided with a lubricating medium.

[0009] Preferably, the grease storage groove comprises a long groove, and the long groove is arranged in a "[" shape on the relative friction surface.

[0010] Preferably, the fat storage groove is configured as a plurality of short straight grooves or circular grooves.

[0011] Preferably, the total area of ​​the grease storage grooves on the relative friction surface accounts for 15%-30% of the area of ​​the relative friction surface.

[0012] Preferably, the distribution of the grease storage grooves in the axial direction of the inner mold accounts for more than 70% of the axial width of the relative friction surface.

[0013] Preferably, the depth of the fat storage groove is 1mm-2mm.

[0014] Preferably, a transition fillet is provided between the grease storage groove and the relative friction surface.

[0015] Preferably, the cross-section of the fat storage tank is set to be rectangular, triangular or arc-shaped.

[0016] Preferably, the relative friction surface provided with the grease storage groove is subjected to nitriding treatment, or quenching treatment, or laser cladding treatment.

[0017] Preferably, when both the large inner mold and the small inner mold on the same relative friction surface are provided with grease storage grooves, the grease storage grooves on the large inner mold and the grease storage grooves on the small inner mold are alternately arranged on the relative friction surface.

[0018] The utility model is beneficial in that:

[0019] The utility model reduces the friction resistance of the relative friction surfaces and the adhesion between the same materials during the friction process of the relative friction surfaces by processing grease storage grooves on the adjacent relative friction surfaces of the rigid inner molds and adding lubricating medium in the grease storage grooves, thereby reducing the wear of the relative friction surfaces and extending the service life of the vertical seams of the rigid inner molds. Compared with the method of installing wear-resistant plates on the moving surfaces, the utility model reduces the processing difficulty, and in later use, it only needs to apply the lubricating medium regularly, and there is no need to replace the wear-resistant plate components, which reduces the difficulty of subsequent use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A top view of a rigid inner mold for tire vulcanization;

[0021] Figure 2 This is a schematic diagram of the utility model in which the grease storage groove on the relative friction surface is a "["-shaped long groove;

[0022] Figure 3 This is a schematic diagram of the utility model in which the grease storage groove on the relative friction surface is a short straight groove;

[0023] Figure 4 It is a schematic diagram of an inclined straight short groove on the relative friction surface of the utility model;

[0024] Figure 5 This is a schematic diagram of the utility model in which the grease storage groove on the relative friction surface is a circular groove;

[0025] Figure 6 This is a schematic diagram of the utility model in which the cross section of the fat storage tank is a rectangle;

[0026] Figure 7 This is a schematic diagram of the utility model in which the cross section of the fat storage tank is a triangle;

[0027] Figure 8 This is a schematic diagram showing that the cross section of the fat storage tank of the utility model is an arc shape.

[0028] In the figure: 1-large inner mold, 2-small inner mold, 3-relative friction surface, 4-grease storage groove, 5-transition fillet. DETAILED DESCRIPTION

[0029] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0030] like Figures 1 to 8 As shown, a rigid inner mold for tire vulcanization includes a plurality of large inner molds 1 and a plurality of small inner molds 2 alternately arranged in the circumferential direction, a grease storage groove 4 is provided on the relative friction surface 3 between adjacent large inner molds 1 and small inner molds 2, a lubricating medium is provided in the grease storage groove 4, and the grease storage groove 4 is arranged on the large inner mold 1 and / or the small inner mold 2. When the large inner mold 1 and the small inner mold 2 on the same relative friction surface 3 are both provided with grease storage grooves 4, the grease storage grooves 4 on the large inner mold 1 and the grease storage grooves 4 on the small inner mold 2 are preferably staggered on the relative friction surface.

[0031] The above structure reduces the friction resistance and adhesion between the same materials during the friction process of the relative friction surface 3 by processing the grease storage groove 4 on the adjacent rigid inner mold relative friction surface 3 and adding lubricating medium in the grease storage groove 4, thereby reducing the wear of the relative friction surface 3 and extending the service life of the vertical seam of the rigid inner mold. Compared with the method of installing wear-resistant plates on the moving surface, the processing difficulty is reduced, and in the later use, it only needs to apply the lubricating medium regularly, and there is no need to replace the wear-resistant plate parts, which reduces the difficulty of subsequent use and maintenance.

[0032] The utility model fat storage tank 4 includes a long groove, such as Figure 2 As shown, the long groove is arranged in a "[" shape on the relative friction surface 3. Specifically, the vertical groove of the "["-shaped long groove is arranged at the corresponding inner mold crown wall position, and the transverse grooves at both ends of the "["-shaped long groove are arranged at the corresponding inner mold crown wall side wall positions.

[0033] The utility model can also be configured as a plurality of short grooves or circular grooves, such as Figures 3 to 5 As shown, the total area of ​​the grease storage grooves 4 on the relative friction surface 3 preferably accounts for 15%-30% of the area of ​​the relative friction surface 3. This lubrication area ratio can ensure that the friction has sufficient rigid support during the relative movement and that there is sufficient lubrication replenishment. In addition, the distribution of the grease storage grooves 4 in the axial direction of the inner mold preferably accounts for more than 70% of the axial width of the relative friction surface 3. During the radial movement, the lubricating medium can be evenly coated on the radial width of the relative friction surface 3.

[0034] The depth of the grease storage groove 4 is preferably 1mm-2mm. This is because if the depth of the grease storage groove 4 is too deep, the lubricating medium at the bottom of the grease storage groove 4 cannot be replenished to the relative friction surface 3. If the depth of the grease storage groove 4 is too shallow, the lubricating medium in the grease storage groove 4 is quickly consumed during use and cannot play a long-term lubrication role.

[0035] A transition fillet 5 is preferably provided between the grease storage groove 4 and the relative friction surface 3. The fillet transition can facilitate the flow and outward replenishment of the lubricating medium. The cross section of the grease storage groove 4 can be set to various cross-sectional shapes such as a rectangle, a triangle, or an arc.

[0036] The relative friction surface 3 of the utility model provided with a grease storage groove 4 needs to ensure a certain rigidity. It is preferably subjected to nitriding treatment, quenching treatment, or laser cladding treatment to improve the hardness of the relative friction surface 3 to ensure that the relative friction surface 3 has sufficient rigidity support. The rigidity support is combined with lubrication to improve the wear resistance of the relative friction surface 3 and increase the service life.

[0037] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A rigid inner mold for tire vulcanization, characterized in that: The invention comprises a plurality of large inner dies (1) and a plurality of small inner dies (2) arranged alternately in the circumferential direction, a grease storage groove (4) is provided on the relative friction surface (3) between the adjacent large inner dies (1) and the small inner dies (2), and the grease storage groove (4) is arranged on the large inner dies (1) and / or the small inner dies (2); The grease storage tank (4) is provided with a lubricating medium.

2. A rigid inner mold for tire vulcanization according to claim 1, characterized in that: The grease storage groove (4) comprises a long groove, and the long groove is arranged in a "[" shape on the relative friction surface (3).

3. A rigid inner mold for tire vulcanization according to claim 1, characterized in that: The fat storage grooves (4) are configured as a plurality of short straight grooves or circular grooves.

4. A rigid inner mold for tire vulcanization according to claim 1, characterized in that: The total area of ​​the grease storage grooves (4) on the relative friction surface (3) accounts for 15%-30% of the area of ​​the relative friction surface (3).

5. A rigid inner mold for tire vulcanization according to claim 1, characterized in that: The distribution of the grease storage groove (4) in the axial direction of the inner mold accounts for more than 70% of the axial width of the relative friction surface (3).

6. A rigid inner mold for tire vulcanization according to claim 1, characterized in that: The depth of the fat storage groove (4) is 1 mm-2 mm.

7. A rigid inner mold for tire vulcanization according to claim 6, characterized in that: A transition fillet (5) is provided between the grease storage groove (4) and the relative friction surface (3).

8. A rigid inner mold for tire vulcanization according to claim 6, characterized in that: The cross section of the fat storage tank (4) is designed to be rectangular, triangular or arc-shaped.

9. A rigid inner mold for tire vulcanization according to claim 1, characterized in that: The relative friction surface (3) provided with the grease storage groove (4) is subjected to nitriding treatment, or quenching treatment, or laser cladding treatment.

10. A rigid inner mold for tire vulcanization according to claim 1, characterized in that: When the large inner mold (1) and the small inner mold (2) of the same relative friction surface (3) are both provided with grease storage grooves (4), the grease storage grooves (4) on the large inner mold (1) and the grease storage grooves (4) on the small inner mold (2) are arranged alternately on the relative friction surface (3).

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