Split mold for a flexible tire

Abstract

The utility model provides a kind of split live tyre mould, including base, the lower side plate is arranged on base, and the surface of base is arranged with multiple groups of lower sliding block that can slide open and close, the outer side of lower sliding block is inclined plane, and its inner side is provided with lower pattern block, and the middle sleeve is arranged on base and can be lifted, and the inner side of middle sleeve is circular table cavity, and the inner side of middle sleeve is abutted with the outer side of lower sliding block, and the inner ring of middle sleeve is arranged with multiple groups of upper sliding block that can slide along its generatrix, and upper sliding block side is provided with upper pattern block, and the elastic reset component connected with lower sliding block is arranged on base, and multiple groups of lower sliding block are driven to slide open after the middle sleeve is lifted by elastic reset component. Tire vulcanization forming is carried out by the mould, and the mould opening stroke is only determined by the depth of pattern, is not limited by the length of sidewall pattern, solves the long side flower tire opening problem, and maintains the advantage that live mould is opened first in radial direction, takes tire smoothly, and does not hurt tire.

Description

Technical Field

[0001] This utility model relates to the field of tire mold technology, specifically to a split-type flexible tire mold. Background Technology

[0002] Tire vulcanization is a crucial process in tire forming. Currently, there are two main types of vulcanization molds: two-part molds and hinged molds. Two-part molds have a simple structure, consisting of only upper and lower halves. After the mold is opened, the tire tread pattern remains embedded in the mold and must be forcibly removed using the tire's elasticity, which can easily damage the tire's internal structure. This type of mold is only suitable for bias-ply tires with simple tread patterns or agricultural tires.

[0003] The movable mold opens radially from the tread blocks first, allowing the tread pattern to completely detach from the tire before the entire mold is opened to remove the tire. This effectively protects the tire, improves quality, and offers excellent uniformity and dynamic balance. For example, Chinese invention patent CN107310076A provides a two-layer tread block tire mold. For tires with tread patterns extending to the sidewall (such as off-road tires), this mold structure avoids the problem of severe rubber extrusion at the joint area that occurs with ordinary movable molds. It reduces the amount of labor required to clean the rubber edges of the tire, improves the tire's appearance, and prevents damage to the mold parting surface caused by rubber extrusion.

[0004] However, when the tire sidewall tread pattern is long, the parting line between the tread blocks and the sideplate must be shifted outward to avoid tread patterns on the sideplate, resulting in a very large radial opening stroke required for the mold. If part of the tread pattern is designed on the sideplate, there is a risk of misalignment between the sideplate and the tread blocks, affecting the tire's appearance and complicating processing and maintenance. In view of this, a split-type flexible tire mold is proposed to solve the above technical problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes a split-type flexible tire mold to solve the technical problem mentioned in the background art: when opening existing tire molds, if the tire sidewall tread pattern is long, in order to avoid the sideplate being covered with tread patterns, the parting line between the tread block and the sideplate must be moved outward, which results in a very large radial opening stroke required for the mold and increases the difficulty of mold opening.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a split-type flexible tire mold, comprising: The base is provided with a lower side plate. Multiple sets of slidable and openable lower sliders are arranged circumferentially on the surface of the base. The outer side of the lower slider is a slope, and the inner side is provided with a lower pattern block. The middle sleeve is height-adjustable and mounted on the base, and its inner side is a frustum-shaped cavity. The inner side of the middle sleeve abuts against the outer side of the lower slider. Multiple sets of upper sliders are arranged circumferentially and are all slidably disposed within the middle sleeve along the generatrix of the frustum-shaped cavity inside the middle sleeve. A patterned block is provided on one side of each upper slider. Multiple sets of elastic reset components are provided, all of which are mounted on the base and connected to the lower slider, so as to drive multiple sets of the lower slider to slide open after the middle sleeve rises.

[0007] In a preferred embodiment, the elastic reset component includes: An inner retaining ring is provided on the base; An outer retaining ring is disposed on the base, and the lower slider is located between the inner retaining ring and the outer retaining ring; and One end of the spring abuts against the inner retaining ring, and the other end abuts against the lower slider.

[0008] In a preferred embodiment, the lower slider is detachably connected to the lower patterned block via a lower patterned block fixing screw.

[0009] In a preferred embodiment, the upper slider is detachably connected to the upper patterned block via upper patterned block fixing screws.

[0010] In a preferred embodiment, a lower wedge block is fixedly disposed on the base, and the lower slider is slidably engaged on the lower wedge block via a first sliding groove.

[0011] In a preferred embodiment, an upper wedge block is fixedly provided on the inner side of the middle sleeve, and the upper slider is slidably engaged on the upper wedge block through a second sliding groove.

[0012] In a preferred embodiment, a friction-reducing plate is provided between the upper slider and the lower slider.

[0013] In a preferred embodiment, the inner sleeve is provided with a liftable upper cover, and multiple sets of upper sliders are slidably disposed at the bottom of the upper cover, and the bottom of the upper cover is provided with an upper side plate.

[0014] In a preferred embodiment, the middle sleeve is provided with a limiting component to limit the maximum radial opening stroke of the upper slider.

[0015] In a preferred embodiment, the limiting component includes a limiting pin disposed within the middle sleeve, and a limiting groove is formed on the upper slider, with the limiting pin slidably engaged within the limiting groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: During mold opening, the vulcanizing machine drives the inner sleeve to move upwards. Guided by the inner side of the inner sleeve, the upper slide block moves radially outwards, detaching the upper tread block from the tire. Simultaneously, the upward movement of the inner sleeve relieves pressure on the lower slide block. Under the action of the elastic reset component, multiple sets of lower slide blocks move radially outwards, detaching multiple sets of lower tread blocks from the tire. After radial mold opening is complete, both the upper and lower tread blocks are completely detached from the tire tread. Subsequently, the vulcanizing machine continues to lift the upper part of the mold to separate it from the lower part, allowing for the smooth removal of the vulcanized tire or the insertion of a new tire blank. This mold is used for tire vulcanization and molding. The mold opening stroke is determined only by the tread depth, not by the sidewall tread length, solving the mold opening problem for tires with long sidewall patterns. It also retains the advantages of radial first mold opening with a movable mold, ensuring smooth tire removal without damaging the tire. It is particularly suitable for high-end products such as radial tires with complex and deep sidewall patterns. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 A cross-sectional view of a split-type flexible tire mold provided by this utility model; Figure 2 This is a schematic diagram of the open state structure of a split-type flexible tire mold according to this utility model; Figure 3 This is a schematic diagram of the structure of a split flexible tire mold after it has been fully opened according to this utility model; Figure label: 1. Spring; 2. Lower side plate; 3. Base; 4. Inner retaining ring; 5. Lower wedge block; 6. Outer retaining ring; 7. Lower patterned block fixing screw; 8. Lower patterned block; 9. Lower slider; 10. Upper patterned block fixing screw; 11. Upper slider; 12. Upper patterned block; 13. Upper wedge block; 14. Middle sleeve; 15. Top cover; 16. Upper side plate; 17. Limiting pin; 18. Friction reducing plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0020] Example: like Figures 1 to 3As shown, this utility model provides a split-type flexible tire mold, including a base 3, on which a base 2 is provided. Multiple sets of slidable and openable lower sliders 9 are arranged circumferentially on the surface of the base 3. The outer side of the lower slider 9 is inclined, and the inner side is provided with a lower tread block 8. A middle sleeve 14 is provided on the base 3 and can be raised and lowered. The middle sleeve 14 is connected to the lifting end of the vulcanizing machine. The inner side of the middle sleeve 14 is a frustum-shaped cavity. The inner side of the middle sleeve 14 abuts against the outer side of the lower slider 9. Multiple sets of upper sliders 11 are arranged circumferentially inside the middle sleeve 14. The upper sliders 11 can slide along the generatrix of the frustum-shaped cavity inside the middle sleeve 14. An upper tread block 12 is provided on one side of the upper slider 11. A raiseable and lowerable upper cover 15 is provided inside the middle sleeve 14. Multiple sets of upper sliders 11 are slidably disposed at the bottom of the upper cover 15. An upper side plate 16 is provided at the bottom of the upper cover 15.

[0021] The base 3 is equipped with multiple sets of elastic reset components connected to the lower slider 9. After the middle sleeve 14 rises, the elastic reset components drive the multiple sets of lower sliders 9 to slide open. The elastic reset components include an inner retaining ring 4 and an outer retaining ring 6 set on the base 3. The lower slider 9 is located between the inner retaining ring 4 and the outer retaining ring 6. It also includes a spring 1, one end of which abuts against the inner retaining ring 4 and the other end of which abuts against the lower slider 9.

[0022] During mold opening, the vulcanizing machine drives the middle sleeve 14 to move upwards. The upper slide block 11, guided by the inner side of the middle sleeve 14, moves radially outwards, causing the upper tread block 12 to detach from the tire. Simultaneously, the upward movement of the middle sleeve 14 relieves pressure on the lower slide block 9. Under the action of the spring 1, multiple sets of lower slide blocks 9 move radially outwards. The movement of the lower slide blocks 9 is limited by the inner retaining ring 4 and the outer retaining ring 6, allowing multiple sets of lower tread blocks 8 to detach from the tire. After radial mold opening is completed, both the upper tread block 12 and the lower tread block 8 are completely detached from the tire tread. Subsequently, the vulcanizing machine continues to lift the upper part of the mold to separate it from the lower part, allowing for the smooth removal of the vulcanized tire or the insertion of a new tire blank. This mold is used for tire vulcanization and molding. The mold opening stroke is determined only by the tread depth and is not limited by the sidewall tread length, solving the mold opening problem for tires with long sidewall patterns. It also retains the advantages of radial first mold opening with a flexible mold, ensuring smooth tire removal without damaging the tire. It is particularly suitable for high-end products such as radial tires with complex and deep sidewall tread patterns.

[0023] like Figure 1 As shown, in this embodiment, the lower slide block 9 is detachably connected to the lower tread block 8 via the lower tread block fixing screw 7, and the upper slide block 11 is detachably connected to the upper tread block 12 via the upper tread block fixing screw 10. This allows the upper tread block 12 and the lower tread block 8 to be replaced, facilitating the production of tires of different models.

[0024] like Figure 1 , 2As shown, in this embodiment, a lower wedge block 5 is fixedly mounted on the base 3, and the lower slider 9 is slidably engaged on the lower wedge block 5 via a first groove. An upper wedge block 13 is fixedly mounted on the inner side of the middle sleeve 14, and the upper slider 11 is slidably engaged on the upper wedge block 13 via a second groove. The lower wedge block 5 positions the movement of the lower slider 9, and the upper wedge block 13 positions the movement of the upper slider 11, improving the stability of mold opening and closing. Furthermore, a friction-reducing plate 18 is provided between the upper slider 11 and the lower slider 9 to reduce the friction between them, making mold opening smoother.

[0025] like Figure 1 , 3 As shown, in this embodiment, the middle sleeve 14 is provided with a limiting component to restrict the maximum radial mold opening stroke of the upper slider 11. The limiting component includes a limiting pin 17 disposed within the middle sleeve 14, and a limiting groove is formed on the upper slider 11, with the limiting pin 17 slidably engaged within the limiting groove. By arranging the limiting pin 17, the maximum mold opening stroke of the upper slider 11 can be limited, allowing the middle sleeve 14 to control the upward movement of the upper slider 11 as it continues to move upward, facilitating the removal of the tire and the insertion of a new tire blank.

[0026] Understandably, in some preferred embodiments, this split tire swivel mold divides the traditional integral swivel mold structure into two independent swivel mold units at or near the center of the tire. That is, the tread rings are divided into an upper tread ring group and a lower tread ring group, and the corresponding mold sleeve sliders are also divided into an upper slider assembly and a lower slider assembly. The upper tread ring group is fixed to the upper slider assembly, and the lower tread ring group is fixed to the lower slider assembly.

[0027] The opening and closing of the upper slider assembly is driven by the axial movement of the middle sleeve 14. The axial movement of the middle sleeve 14 is converted into the radial movement of the upper slider assembly by the cooperation of the upper wedge block 13 and the wedge groove.

[0028] The opening and closing of the lower slider assembly is achieved through a spring mechanism. When the mold is closed, the middle sleeve 14 presses against the lower slider assembly, compressing the spring 1; when the mold is opened, the middle sleeve 14 moves upward to release the pressure, the spring 1 releases its elastic force, and pushes the lower slider assembly to move radially outward, thereby realizing the opening of the lower pattern ring assembly.

[0029] By setting limit pins 17 or screws and outer retaining rings 6 or retaining pins, the maximum mold opening stroke of the upper and lower slider assemblies can be precisely controlled. This stroke only needs to be slightly greater than the depth of the corresponding tire tread.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above. Modifications or improvements can be made to this utility model, which is obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this utility model fall within the scope of protection claimed by this utility model.

Claims

1. A split-type flexible tire mold, characterized in that, Including: The base (3) is provided with a lower side plate (2). Multiple sets of sliding and opening lower sliders (9) are arranged in a ring around the base (3). The outer side of the lower slider (9) is a slope, and the inner side is provided with a lower pattern block (8). The middle sleeve (14) is raised and lowered on the base (3), and its inner side is a frustum-shaped cavity. The inner side of the middle sleeve (14) abuts against the outer side of the lower slider (9). The upper slider (11) has multiple sets arranged circumferentially, all slidingly disposed within the inner frustum-shaped cavity generatrix of the middle sleeve (14). An upper patterned block (12) is provided on one side of the upper slider (11); and Multiple sets of elastic reset components are provided, all of which are mounted on the base (3) and connected to the lower slider (9) to drive multiple sets of the lower slider (9) to slide open after the middle sleeve (14) rises.

2. The split-type flexible tire mold according to claim 1, characterized in that, The elastic reset component includes: An inner retaining ring (4) is provided on the base (3); An outer retaining ring (6) is disposed on the base (3), and the lower slider (9) is located between the inner retaining ring (4) and the outer retaining ring (6); and One end of the spring (1) abuts against the inner retaining ring (4), and the other end abuts against the lower slider (9).

3. The split-type flexible tire mold according to claim 1, characterized in that: The lower slider (9) is detachably connected to the lower patterned block (8) by the lower patterned block fixing screw (7).

4. The split-type flexible tire mold according to claim 1, characterized in that: The upper slider (11) is detachably connected to the upper patterned block (12) by the upper patterned block fixing screw (10).

5. A split-type flexible tire mold according to claim 1, characterized in that: A lower wedge block (5) is fixedly installed on the base (3), and the lower slider (9) is slidably engaged on the lower wedge block (5) through the first sliding groove.

6. A split-type flexible tire mold according to claim 1, characterized in that: An upper wedge block (13) is fixedly provided on the inner side of the middle sleeve (14), and the upper slider (11) is slidably engaged on the upper wedge block (13) through the second slide groove.

7. A split-type flexible tire mold according to claim 1, characterized in that: A friction-reducing plate (18) is provided between the upper slider (11) and the lower slider (9).

8. A split-type flexible tire mold according to claim 1, characterized in that: The middle sleeve (14) is provided with a liftable upper cover (15), and multiple sets of upper sliders (11) are slidably disposed at the bottom of the upper cover (15). The bottom of the upper cover (15) is provided with an upper side plate (16).

9. A split-type flexible tire mold according to claim 1, characterized in that: The middle sleeve (14) is provided with a limiting component that limits the maximum radial opening stroke of the upper slider (11).

10. A split-type flexible tire mold according to claim 9, characterized in that: The limiting component includes a limiting pin (17) disposed in the middle sleeve (14), and a limiting groove is provided on the upper slider (11), and the limiting pin (17) is slidably engaged in the limiting groove.

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