Two-half mold

Abstract

The utility model discloses a two-half mold, which belongs to the technical field of tire molds and comprises a mold body, a mounting groove is arranged at the position of the mold body corresponding to a rim, a lever groove loose piece is detachably mounted in the mounting groove, and a lug for forming a lever groove is arranged on the surface of the lever groove loose piece. According to the utility model, the die body and the lug corresponding to the lever groove are changed into a split structure, and the two parts are respectively and independently processed and then assembled, so that the processing period is shortened, the fit clearance can be better controlled after the lever groove loose piece is arranged in the die body through reasonable tolerance control, and the processing period and the processing quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire molds, and particularly relates to a split mold. Background Art

[0002] For tires, especially agricultural tires, there are local depressions near the rim to facilitate inserting a tire lever for removing the tire. Currently, the lever groove on the split mold is an integral structure with the mold body. As shown in Figure 5 , it presents a local convex pattern in the rim groove of the mold.

[0003] Common processing methods include retention processing and additive processing. Both of these processing methods have problems such as high processing costs, long processing cycles, and uncontrollable quality.

[0004] Retention processing: Machining is performed in a full circle according to the curved surface at the highest position of the lever groove. The tire contour is machined by the machine tool in a full circle. However, the length dimension of the lever groove is small, and a large amount of material needs to be removed in a full circle. In this processing method, the machining time of the machine tool is long, and there are obvious tool marks on the surface after machining, which requires fitter to trim again, resulting in a large workload.

[0005] Additive processing: Machining is performed according to the tire surface, and surfacing is carried out on the mold. After surfacing, the lever groove shape is machined by the machine tool, and then trimmed by the fitter. This processing method has many processing steps, a large deformation of the welded mold body, a long abnormal handling time, and uncontrollable quality.

[0006] In view of the above problems, the utility model designs and manufactures a split mold to overcome the above defects. Content of the Utility Model

[0007] Regarding the problems existing in the prior art, a split mold provided by the utility model can ensure product quality, improve processing efficiency, shorten the processing cycle, and make product processing smoother.

[0008] To achieve the above purpose, the technical solution adopted by the utility model is as follows: A split mold includes a mold body. An installation groove is provided at the position corresponding to the rim on the mold body. A lever groove movable block is detachably installed in the installation groove. A convex block for forming a lever groove is provided on the surface of the lever groove movable block.

[0009] Preferably, the installation groove is a sector ring groove concentric with the mold body.

[0010] Preferably, the inner arc surface, the outer arc surface, and the vertical surfaces at both ends of the sector ring groove are perpendicular to the bottom surface of the mold body.

[0011] Preferably, there are rounded corners between the four side surfaces of the lever groove movable block corresponding to the sector ring groove.

[0012] Preferably, the peripheral side surface of the lever groove movable block includes a guiding surface and a mating surface. The guiding surface is close to the insertion end of the lever groove movable block, and there is a gap between the guiding surface and the side surface of the installation groove.

[0013] The mating surface is away from the insertion end of the lever groove movable block, and the mating surface abuts against the side surface of the installation groove.

[0014] Preferably, the height of the mating surface is 3 - 6 mm.

[0015] Preferably, the distance between the edge of the convex block and the adjacent peripheries of the lever groove movable block is not less than 10 mm.

[0016] Preferably, the thinnest dimension of the lever groove movable block is not less than 15 mm.

[0017] Preferably, at least one connecting hole is provided at the bottom of the installation groove, a threaded hole is provided at the corresponding position of the bottom of the lever groove movable block, and the lever groove movable block is fixed in the installation groove by screws.

[0018] And / or, the distance between the bottom of the threaded hole and the surface of the lever groove movable block is not less than 3 mm.

[0019] Preferably, the die body is provided with a steel - matching cusp corresponding to the rim position, and the steel - matching cusp is the intersection point of the die - body cavity surface and the inner steel - matching conical surface;

[0020] The installation groove is arranged outside the steel - matching cusp, and the distance between the innermost side surface of the installation groove and the steel - matching cusp is not less than 5 mm; or, the installation groove is arranged at the steel - matching cusp position, and the lever groove movable block is provided with a movable - type block cusp having the same shape as the steel - matching cusp.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model changes the convex block of the die body corresponding to the lever groove into a split - type structure, and the two parts are processed separately. Specifically, when processing the die body, the curved surface can be processed according to the normal technological process of the die body itself, and the installation groove can be processed normally. After the lever groove movable block is integrally processed, it is assembled by grinding and matching with the die body through the installation groove, shortening the processing process and reducing the processing difficulty. Compared with the retained processing method, the rough - machining process of the numerical - control machine tool, the circumferential processing process of the letter - engraving machine tool, and the fitting and trimming process of the fitter can be cancelled, shortening the processing time and improving the processing efficiency. Compared with the additive manufacturing method, the scribing process at the installation - groove position, the surfacing process of the lever - groove movable block, the numerical - control machining process of the corresponding lever - groove curved surface, the processing process of the two sides of the corresponding lever groove by the letter - engraving machine tool, and the fitting and trimming process of the fitter can be cancelled. At the same time, the welding deformation is eliminated, the time for abnormal treatment is reduced, the product quality is guaranteed, the processing cycle is shortened, and the processing efficiency is improved. Description of the Drawings

[0023] Figure 1 Schematic diagram of a two - half mold installation groove arranged outside the steel - mating cusp

[0024] Figure 2 Schematic diagram of a two - half mold installation groove arranged at the steel - mating cusp position

[0025] Figure 3 Top view of a two - half mold

[0026] Figure 4 Partial schematic diagram of a two - half mold at the installation groove

[0027] Figure 5 Schematic diagram of the corresponding convex block of the existing mold lever groove and the mold body being an integral structure

[0028] In the figure: 1 - mold body, 2 - lever - groove movable block, 3 - convex block, 4 - steel - mating cusp, 5 - screw, 6 - movable - type block cusp, 7 - guiding surface, 8 - mating surface, 9 - inner steel - mating conical surface, 10 - cavity surface Specific implementation mode

[0029] For the convenience of those skilled in the art to understand, the following further explains the present utility model in conjunction with the attached drawings

[0030] As Figures 1 to 4 shown, a two - half mold includes a mold body 1. The mold body 1 is provided with an installation groove at the corresponding rim position. A lever - groove movable block 2 is detachably installed in the installation groove. The surface of the lever - groove movable block 2 is provided with a convex block 3 for forming a lever groove, and the height of the convex block 3 is higher than the surface of the lever - groove movable block 2

[0031] By changing the traditional integral structure of the mold body 1 and the convex block 3 corresponding to the lever groove into a split - type structure, the two parts are separately processed and then assembled, greatly shortening the processing cycle

[0032] The installation groove is preferably set as a fan - shaped ring groove concentric with the mold body 1, that is, the inner arc surface and the outer arc surface of the fan - shaped ring groove are both concentric with the mold body 1, and the extension directions of the two vertical surfaces at both ends of the fan - shaped ring groove will pass through the center of the mold body 1. Of course, the installation groove can also be selected as a rectangular groove or a circular groove and other structures. The inner arc surface, the outer arc surface and the two vertical surfaces at both ends of the fan - shaped ring groove are all perpendicular to the bottom surface of the mold body 1, facilitating the cooperation between the lever - groove movable block 2 and the fan - shaped ring groove. The bottom of the fan - shaped ring groove is set as a plane, and the end face of the insertion end of the lever - groove movable block 2 is also set as a plane

[0033] There are round corners between the four side surfaces of the lever - groove movable block 2 corresponding to the fan - shaped ring groove, generally R5 is selected. There are also round corners between the four side surfaces of the corresponding fan - shaped ring groove, facilitating the machining of the tool

[0034] To further ensure the fitting quality and installation efficiency between the lever groove movable block 2 and the installation groove, the peripheral side surface of the lever groove movable block 2 of the present utility model preferably includes a guiding surface 7 and a fitting surface 8. Specifically, the guiding surface 7 is close to the insertion end of the lever groove movable block 2, and there is a gap between the guiding surface 7 and the side surface of the installation groove, thus facilitating the insertion of the lever groove movable block 2 into the installation groove; the fitting surface 8 is away from the insertion end of the lever groove movable block 2, and the fitting surface 8 abuts against the side surface of the installation groove. When the two are fitted, a transition fit form will be formed, avoiding the entry of rubber compound into the installation groove during the vulcanization of the tire. The height of the fitting surface 8 is preferably 3-6 mm, ensuring that there is sufficient abutting area between the fitting surface 8 and the side surface of the installation groove.

[0035] The distance between the edge of the convex block 3 of the present utility model and the adjacent peripheries of the lever groove movable block 2 is preferably not less than 10 mm, and the thinnest dimension of the lever groove movable block 2 is not less than 15 mm, ensuring the structural strength of the lever groove movable block 2 itself.

[0036] At least one connection hole is provided at the bottom of the installation groove, and a threaded hole is provided at the corresponding position of the bottom of the lever groove movable block 2. The lever groove movable block 2 is fixed in the installation groove by a screw 5. The distance between the bottom of the threaded hole and the surface of the lever groove movable block 2 is preferably not less than 3 mm.

[0037] The present utility model is provided with a steel matching cusp 4 at the position corresponding to the rim of the die body 1. The steel matching cusp 4 is the intersection point of the cavity surface 10 of the die body 1 and the inner steel matching conical surface 9. The installation groove is arranged outside the steel matching cusp 4, and the distance between the innermost side surface of the installation groove and the steel matching cusp 4 is not less than 5 mm, preventing the installation groove from being too close to the steel matching cusp 4, resulting in the steel matching cusp 4 being too sharp or too thin, with potential safety hazards and insufficient strength; or, directly arranging the installation groove at the position of the steel matching cusp 4, and the lever groove movable block 2 is provided with a movable block cusp 6 having the same shape as the steel matching cusp 4, which will avoid the problem of the steel matching cusp 4 being too sharp or too thin.

[0038] Since the lever groove movable block 2 of the present utility model is ground and assembled with the die body 1 through the installation groove after being integrally processed, the processing flow is shortened and the processing difficulty is reduced. Compared with the retained processing method, the rough machining process of the numerical control machine tool, the circumferential machining process of the lettering machine tool, and the fitting process of the fitter can be cancelled, shortening the processing time and improving the processing efficiency. Compared with the additive manufacturing method, the scribing process at the installation groove position, the process of surfacing the lever groove movable block 2, the process of numerically controlling the machining of the corresponding lever groove curved surface, the process of machining the corresponding two sides of the lever groove by the lettering machine tool, and the fitting process of the fitter can be cancelled. At the same time, the welding deformation is eliminated, the time for abnormal treatment is reduced, the product quality is ensured, the processing cycle is shortened, and the processing efficiency is improved.

[0039] It should be understood that the use of these embodiments is only for illustrating the present utility model rather than intending to limit the protection scope of the present utility model. In addition, it should also be understood that after reading the technical content of the present utility model, those skilled in the art can make various changes, modifications and / or variations to the present utility model, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A two - half mold, characterized in that, It includes a mold body (1), and the mold body (1) is provided with an installation groove at the corresponding rim position. A lever groove movable block (2) is detachably installed in the installation groove, and a convex block (3) for forming a lever groove is provided on the surface of the lever groove movable block (2).

2. The two-half mold according to claim 1, wherein, The installation groove is set as an annular sector groove concentric with the mold body (1).

3. The two - half mold according to claim 2, characterized in that, The inner arc surface, outer arc surface and vertical surfaces at both ends of the annular sector groove are all perpendicular to the bottom surface of the mold body (1).

4. The two - half mold according to claim 3, characterized in that, There are rounded corners between the four side surfaces of the lever groove movable block (2) corresponding to the annular sector groove.

5. The two-half mold according to claim 1, characterized in that, The peripheral side surface of the lever groove movable block (2) includes a guiding surface (7) and a mating surface (8). The guiding surface (7) is close to the insertion end of the lever groove movable block (2), and there is a gap between the guiding surface (7) and the side surface of the installation groove. The mating surface (8) is away from the insertion end of the lever groove movable block (2), and the mating surface (8) abuts against the side surface of the installation groove.

6. The two - half mold according to claim 5, wherein, The height of the mating surface (8) is 3 - 6 mm.

7. A two-half mold according to claim 1, characterized in that, The distance between the edge of the convex block (3) and the adjacent periphery of the lever groove movable block (2) is not less than 10 mm.

8. A split mold according to claim 1, characterized in that, The thinnest dimension of the lever groove movable block (2) is not less than 15 mm.

9. A split mold according to claim 1, wherein, At least one connecting hole is provided at the bottom of the installation groove. A threaded hole is provided at the position of the lever groove movable block (2) corresponding to the connecting hole. The lever groove movable block (2) is fixed in the installation groove by a screw (5). And / or, the distance between the bottom of the threaded hole and the surface of the lever groove movable block (2) is not less than 3 mm.

10. A split mold according to claim 1, characterized in that, The mold body (1) is provided with a steel matching tip (4) at the corresponding rim position. The steel matching tip (4) is the intersection point of the cavity surface (10) of the mold body (1) and the inner steel matching cone surface (9). The installation groove is arranged outside the steel matching tip (4), and the distance between the innermost side surface of the installation groove and the steel matching tip (4) is not less than 5 mm; or, the installation groove is arranged at the position of the steel matching tip (4), and a movable block tip (6) with the same shape as the steel matching tip (4) is provided on the lever groove movable block (2).

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