Mold structure for improving uniformity of tire

Abstract

The utility model relates to the technical field of tire molds, in particular to a mold structure for improving tire uniformity, which comprises a mold, the mold comprises an upper mold and a lower mold which are symmetrical in appearance, when the upper mold and the lower mold are tightly attached, a cavity is formed in the center, and a grain plate is arranged in the mold structure in an inserted mode. The accurate matching of the grain plate and the mold cavity can ensure the uniform distribution of the sizing material in the cavity, so that the problems of uneven thickness or weight deviation and the like in the tire forming process are avoided, the grain type and pattern of the tire can be easily adjusted by arranging different grain plates so as to adapt to different road conditions and driving requirements, and the production efficiency is improved. And a plurality of rubber runners are also arranged, and the bottom of each rubber runner is provided with a bent runner and a branch runner, so that the flowing speed of the rubber is favorably reduced, the rubber has more sufficient time to be diffused and mixed in the cavity, the uniformity of the rubber is improved, and the tire defects caused by non-uniform flowing of the rubber are reduced.

Description

Technical Field

[0001] This utility model relates to the field of tire mold technology, and in particular to a mold structure for improving tire uniformity. Background Technology

[0002] Tire uniformity is crucial to its performance and lifespan. Tire uniformity encompasses multiple aspects, including weight, thickness, hardness, dynamic balance, radial runout, and lateral runout. The uniformity of these parameters directly affects a tire's rolling resistance, wear resistance, fatigue resistance, handling stability, and comfort. Therefore, improving tire uniformity is a continuous goal pursued by the tire manufacturing industry.

[0003] In the tire manufacturing process, the mold structure plays a crucial role. Factors such as mold structural design, material selection, manufacturing process, and the mold's precision and stability all directly affect the tire's molding quality and uniformity.

[0004] When the rubber compound flows unevenly or contains air bubbles during the tire molding process, problems such as increased scrap rate, reduced production efficiency, and delayed production schedule occur. In view of this, a mold structure for improving tire uniformity is provided. Utility Model Content

[0005] The main purpose of this utility model is to provide a mold structure for improving the uniformity of tires, so as to solve the problems mentioned in the related technology, such as uneven flow of rubber material and air bubbles during the tire molding process, which lead to increased scrap rate, reduced production efficiency and delayed production schedule.

[0006] To achieve the above objectives, according to one aspect of the present invention, a mold structure for improving tire uniformity is provided, comprising a mold, the mold including an upper mold and a lower mold with symmetrical shapes, wherein when the upper mold and the lower mold are tightly fitted together, a cavity is formed at the center, and a tread plate in the shape of the tire outer wall is inserted into the cavity, and a plurality of rubber flow channels are arranged in a ring array inside the upper mold.

[0007] Furthermore, the textured plate includes a side plate and a bottom plate. The inner wall of the textured plate is provided with a plurality of hollowed-out patterns. When the textured plate is inserted into the cavity, the side plate is tightly fitted with the side wall of the cavity, and the bottom plate is tightly fitted with the bottom of the cavity.

[0008] Furthermore, the adhesive flow channel includes a main channel, the diameter of which gradually decreases from top to bottom, and the upper end of the main channel is used for injecting adhesive.

[0009] Furthermore, a bend is fixedly connected to the lower end of the main road, and branch roads are fixedly connected to both sides of the connection between the main road and the bend, and they are interconnected.

[0010] Furthermore, the bend is a streamlined pipe, and the branch is a straight pipe.

[0011] Furthermore, one end of the bend and the branch channel is connected to the cavity, and the diameter of the discharge end of the bend and the branch channel gradually decreases, and the diameter of the discharge end of the bend and the branch channel is smaller than the diameter of the main channel.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In this mold structure for improving tire uniformity, a tread plate with an interlocking arrangement is provided. The precise fit between the tread plate and the mold cavity can ensure the uniform distribution of rubber material in the cavity, thereby avoiding problems such as uneven thickness or weight deviation during tire molding. By setting different tread plates, the tread type and pattern of the tire can be easily adjusted to adapt to different road conditions and driving needs.

[0014] 2. In this mold structure for improving tire uniformity, several rubber flow channels are provided, and the bottom of the rubber channels is provided with bends and branch channels, which helps to slow down the flow speed of the rubber, allowing the rubber to have more time to diffuse and mix in the cavity, thereby improving the uniformity of the rubber and reducing tire defects caused by uneven rubber flow. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the tire mold in a preferred embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the tire mold in a preferred embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the overall structure of the textured plate in a preferred embodiment of the present invention;

[0018] Figure 4 This is a partial cross-sectional view of the mold in a preferred embodiment of the present invention;

[0019] Figure 5 This is a preferred embodiment of the present invention. Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0020] 1. Mold; 11. Upper mold; 12. Lower mold; 13. Cavity;

[0021] 2. Textured plate; 21. Side plate; 22. Base plate;

[0022] 3. Rubber flow channel; 31. Main channel; 32. Curve; 33. Branch channel. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] Please see Figures 1-5 As shown, the purpose of this embodiment is to provide a mold structure for improving tire uniformity, including a mold 1. The mold 1 includes an upper mold 11 and a lower mold 12 with symmetrical shapes. When the upper mold 11 and the lower mold 12 are tightly fitted together, a cavity 13 is formed at the center. A tread plate 2 in the shape of the tire outer wall is inserted into the cavity 13. Several rubber flow channels 3 are arranged in a ring array inside the upper mold 11, so that the rubber can be filled into the cavity 13 more evenly. This helps to reduce defects such as air bubbles and missing material in the tire during the molding process and improve the overall uniformity of the tire.

[0025] The tread plate 2 includes a side plate 21 and a bottom plate 22. The inner wall of the tread plate 2 is provided with a plurality of hollow patterns. When the tread plate 2 is inserted into the cavity 13, the side plate 21 is tightly fitted with the side wall of the cavity 13, and the bottom plate 22 is tightly fitted with the bottom of the cavity 13. This tight fit ensures that the hollow patterns on the tread plate 2 can be accurately replicated during the tire molding process. This accurate replication not only improves the aesthetics of the tire, but also ensures the consistency and reliability of the tire's performance. Furthermore, different tread plates 2 can be replaced according to different tires, making it highly adaptable.

[0026] The design of the perforated patterns is not only for aesthetic purposes, but more importantly, they influence the flow and distribution of the rubber compound within mold 1 through their specific structure. During tire molding, the rubber compound flows along the path of the perforated patterns and is guided by their shape and size. This guiding effect helps ensure that the rubber compound is evenly distributed throughout the tire, reducing defects such as air bubbles and insufficient material.

[0027] The rubber flow channel 3 includes a main channel 31, the diameter of which gradually decreases from top to bottom. This helps to generate a certain pressure when the rubber is injected, pushing the rubber to flow downward along the channel. At the same time, the gradually decreasing diameter can also reduce turbulence and eddies in the flow process, improving the stability of the flow. The upper end of the main channel 31 is used for injecting the rubber, and the port is connected to the rubber injection equipment to ensure that the rubber can accurately enter the main channel 31.

[0028] A bend 32 is fixedly connected to the lower end of the main channel 31. Branch channels 33 are fixedly connected to both sides of the connection between the main channel 31 and the bend 32, and they are interconnected. This allows the rubber material to be dispersed into multiple branch channels 33 when it flows through the bend 32, thereby further improving the uniformity of the rubber material distribution.

[0029] The bend 32 is a streamlined pipe, while the branch channel 33 is a straight pipe. The streamlined bend 32 can minimize the resistance of the rubber material during the turning process, allowing the rubber material to pass through more smoothly and continuously. At the same time, this design also helps to delay the time of rubber material injection into the cavity 13, providing more time to ensure the uniform distribution of the rubber material in the branch channel 33.

[0030] The straight pipe design simplifies the flow path of the rubber compound and reduces energy loss during flow. More importantly, by properly controlling the length and diameter of the branch channel 33, we can ensure that the rubber compound flowing out from the bend 32 and the rubber compound within the branch channel 33 maintain as consistent a speed and pressure as possible when injected into the cavity 13. This not only improves the efficiency of rubber compound filling the cavity 13 but also helps reduce tire defects caused by uneven rubber compound flow.

[0031] One end of the bend 32 and the branch channel 33 is connected to the cavity 13, and the diameter of the outlet end of the bend 32 and the branch channel 33 gradually decreases. The diameter of the outlet end of the bend 32 and the branch channel 33 is smaller than the diameter of the main channel 31. This means that when the rubber material passes through these areas, its flow space is gradually compressed, which can concentrate the pressure of the rubber material and make it have a higher impact force when injected into the cavity 13, thereby more effectively filling all corners of the cavity 13. The gradually decreasing outlet diameter can also reduce the backflow phenomenon of the rubber material during the flow process.

[0032] Backflow refers to the phenomenon where the rubber compound flows backward due to resistance during its flow process, leading to uneven distribution and insufficient filling. By reducing the diameter of the discharge end, we can reduce the possibility of backflow and ensure that the rubber compound can fill the cavity 13 evenly and continuously. Furthermore, this design makes the mold 1 easier to clean and maintain. The gradually decreasing diameter of the discharge end reduces the residue and accumulation of rubber compound in the mold 1, thereby lowering the risk of clogging and damage.

[0033] The upper mold 11 has a ring-shaped array of air channels running through it. These channels are used to expel the gas generated by the rubber compound inside the cavity 13. During the tire molding process, a large amount of gas is generated as the rubber compound is injected and cured. If this gas cannot be expelled in time, it will form bubbles inside the tire, seriously affecting the tire's quality and performance. The air channels are distributed in a ring-shaped array and are numerous, thus ensuring uniform gas discharge within the mold 1. This design not only improves the efficiency of gas discharge but also effectively prevents the accumulation and formation of bubbles inside the tire.

[0034] In practical use, the texture plate 2 is inserted into the cavity 13, and the upper mold 11 and lower mold 12 are tightly fitted together and fixed with screws. The side plate of the texture plate 2 is tightly fitted to the side wall of the cavity 13, and the bottom plate 22 is tightly fitted to the bottom of the cavity 13. The rubber is injected into the injection port of the main channel 31 through the rubber injection equipment. The rubber flows along the main channel 31 to the bend 32 and the branch channel 33 respectively. Due to the streamlined design of the bend, it can be ensured that the rubber flowing out of the bend 32 and the rubber in the branch channel 33 can maintain a consistent speed and pressure when injected into the cavity 13. After sufficient rubber is injected, the mold 1 will enter the cooling and solidification stage. As the rubber solidifies, the outline and texture of the tire will gradually become clear, and finally the tire is formed.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A mold structure for improving tire uniformity, comprising a mold (1), said mold (1) comprising an upper mold (11) and a lower mold (12) with symmetrical shapes, characterized in that, When the upper mold (11) and the lower mold (12) are tightly fitted together, a cavity (13) is formed at the center. A textured plate (2) in the shape of a tire outer wall is inserted into the cavity (13). Several rubber flow channels (3) are arranged in a ring array inside the upper mold (11).

2. The mold structure for improving tire uniformity according to claim 1, characterized in that, The textured plate (2) includes a side plate (21) and a bottom plate (22). The inner wall of the textured plate (2) is provided with a number of hollowed-out patterns. When the textured plate (2) is inserted into the cavity (13), the side plate (21) is tightly fitted with the side wall of the cavity (13), and the bottom plate (22) is tightly fitted with the bottom of the cavity (13).

3. The mold structure for improving tire uniformity according to claim 1, characterized in that, The adhesive flow channel (3) includes a main channel (31), the diameter of which gradually decreases from top to bottom, and the upper end of the main channel (31) is used for injecting adhesive.

4. The mold structure for improving tire uniformity according to claim 3, characterized in that, The lower end of the main road (31) is fixedly connected to a bend (32), and the two sides of the connection between the main road (31) and the bend (32) are fixedly connected to side roads (33), which are interconnected.

5. The mold structure for improving tire uniformity according to claim 4, characterized in that, The bend (32) is a streamlined pipe, and the branch (33) is a straight pipe.

6. The mold structure for improving tire uniformity according to claim 4, characterized in that, One end of the bend (32) and the branch channel (33) is connected to the cavity (13), and the diameter of the discharge end of the bend (32) and the branch channel (33) gradually decreases, and the diameter of the discharge end of the bend (32) and the branch channel (33) is smaller than the diameter of the main channel (31).

Images