A vacuumed two-part living hinge mold

Abstract

The utility model discloses a kind of vacuum two halfs active die, including upper die and lower die, upper die includes upper guide ring and multiple upper active blocks, upper guide ring upper portion is equipped with mounting ring;Lower die includes lower guide ring and multiple lower active blocks, lower active block lower portion is equipped with base;The upper end inboard of upper active block is equipped with upper side plate;The lower end inboard of lower active block is equipped with lower side plate;Lower die is equipped with vacuum port, upper cover and mounting ring between being equipped with upper sealing disc, lower guide ring and base between being equipped with lower sealing disc;Upper sealing disc outside and mounting ring between, upper sealing disc inboard and upper cover between, lower sealing disc outside and lower guide ring between, lower sealing disc inboard and base between, the closing face of upper guide ring and lower guide ring is all equipped with sealing structure.The utility model integrates the advantages of active die, two halfs and vacuum die shell, overcome the active die closing easily produce rubber edge, two halfs take tire difficult and vulcanization easy air pocket problem, improve the forming quality of tire.

Description

Technical Field

[0001] This utility model belongs to the field of tire vulcanization molds, and specifically relates to a vacuum-sealed two-part movable mold. Background Technology

[0002] Currently, radial tires are increasingly widely used due to their superior performance, leading to increasingly fierce market competition. Against this backdrop, tires that combine aesthetically pleasing designs with strong practicality are gaining popularity among consumers, with radial tires featuring tread patterns on the sidewalls becoming a preferred choice for many car owners. From a market value perspective, the profit margin of radial tires with tread patterns far exceeds that of ordinary radial tires. Therefore, tire manufacturers are actively investing in the research and development and production of this type of tire, hoping to gain a favorable position in the highly competitive market and increase their market share and economic benefits.

[0003] In the tire vulcanization process, tire manufacturers generally use movable molds to vulcanize radial tires. However, existing conventional movable molds have significant structural defects: their tread blocks and sidewalls are designed as separate units, and due to limitations in the mold's radial stroke, when vulcanizing tires with tread patterns on the sidewall, the sidewall pattern must be divided into two sections—one on the sidewall and the other on the tread block. After the mold closes, the two sections are then joined to form a complete sidewall pattern. This segmented joining structure, affected by both processing errors and component fit clearances, easily leads to quality defects such as misalignment and rubber edge defects at the joint of the two tread sections after vulcanization. Crucially, the rubber edge is often located inside the tread grooves, making cleaning extremely difficult, severely damaging the tire's appearance and reducing market acceptance.

[0004] Furthermore, existing two-part movable molds primarily focus on optimizing the ease of mold opening and closing, and most lack integrated vacuum structures, thus belonging to non-vacuum molds. During tire vulcanization, air easily remains between the mold cavity and the tire blank. Due to the lack of an effective vacuum mechanism, this residual air cannot be expelled in time, preventing the formation of a stable vacuum environment inside the cavity. Under the high temperature and pressure conditions of vulcanization, this residual air easily forms bubbles or voids in the tire tread and sidewall, causing tire defects such as insufficient rubber. Insufficient rubber defects directly damage the integrity and smoothness of the tire surface, affecting not only the tire's appearance quality but also potentially weakening its structural strength, reducing product performance and market competitiveness, and making it difficult to meet tire companies' demands for large-scale production of high-quality radial tires with sidewall patterns. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a vacuum-sealed two-part movable mold to solve the problem of easy air accumulation during vulcanization of traditional two-part movable molds, thereby improving the appearance quality and structural stability of tires and meeting the production needs of tire companies for high-quality radial tires with sidewall patterns.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A vacuum-sealed two-part movable mold includes an upper mold and a lower mold. The upper mold includes an upper guide ring and multiple upper movable blocks, with a mounting ring on the upper part of the upper guide ring. The lower mold includes a lower guide ring and multiple lower movable blocks, with a base on the lower part of each lower movable block. The multiple upper and lower movable blocks together form the circumferential shape of a tire. An upper side plate is provided on the inner side of the upper end of each upper movable block, and an upper cover is connected to the upper end of the upper side plate and the upper movable block. A lower side plate is provided on the inner side of the lower end of each lower movable block. The upper movable blocks, lower movable blocks, upper side plates, and lower side plates together form a tire mold cavity. The lower mold is provided with a vacuum port, an upper sealing plate is provided between the upper cover and the mounting ring, and a lower sealing plate is provided between the lower guide ring and the base. Sealing structures are provided between the outer side of the upper sealing disc and the mounting ring, between the inner side of the upper sealing disc and the upper cover, between the outer side of the lower sealing disc and the lower guide ring, between the inner side of the lower sealing disc and the base, and on the mating surfaces of the upper and lower guide rings, for sealing after the two movable mold halves are closed.

[0007] Furthermore, a sealing structure is also provided between the mounting ring and the upper guide ring, and between the base and the lower side plate.

[0008] Furthermore, the sealing structure employs one or more combinations of external circular seals or end face seals.

[0009] Furthermore, the upper and lower movable blocks are both integral structures, or the upper and lower movable blocks are composed of a slider and a patterned block, with the patterned block fixed to the inside of the slider.

[0010] Furthermore, the vacuum port is located on the lower guide ring or the lower sealing plate.

[0011] Furthermore, the lower guide ring has a pressure groove on the side near the lower sealing disc, and a pressure block is provided in the pressure groove. The lower sealing disc has a slot on the side near the lower guide ring, and one end of the pressure block extends into the slot and supports the lower sealing disc, forming a mechanical limiting structure.

[0012] Furthermore, the pressure block is detachably connected to the lower guide ring via a connector.

[0013] Furthermore, a gap is provided between the upper end face of the pressure block and the lower end face of the lower sealing disc groove, and a shim is provided at the lower part of the lower guide ring to adjust the gap between the pressure block and the groove, thereby adjusting the clamping force when the upper mold and the lower mold are closed.

[0014] Furthermore, the gap between the upper end face of the pressure block and the lower end face of the lower sealing disc groove is greater than or equal to 0.5 mm.

[0015] The beneficial effects of this utility model are: (1) This vacuum-sealed two-part flexible mold integrates the advantages of flexible mold, two-part mold and vacuum mold shell, and overcomes the problems of easy glue edge when the flexible mold is closed, difficulty in removing the tire from the two-part mold and easy air accumulation during vulcanization, thus improving the forming quality of the tire.

[0016] (2) By setting a sealing structure between the mounting ring and the upper guide ring and between the base and the lower side plate, the sealing performance of the two movable molds during vacuuming is further guaranteed.

[0017] (3) A pressure groove is set at the lower part of the lower guide ring, and a pressure block is set in the pressure groove. At the same time, a slot is set on one side of the lower sealing disc. The pressure block supports the lower sealing disc, forming a mechanical limiting structure, which ensures the stability of the connection between the lower sealing disc and the lower guide ring and prevents the lower sealing disc from falling off when the lower mold is flipped.

[0018] (4) There is a gap between the upper end face of the pressure block and the lower end face of the lower sealing disc groove. A shim is provided at the lower part of the lower guide ring. The shim is used to adjust the clamping force of the upper mold and the lower mold, to ensure that the tire blank fits tightly into the cavity, improve the clarity of the tread pattern, the uniformity of the tire body density and the overall dimensional accuracy, and ensure the tire forming quality. Attached Figure Description

[0019] Figure 1 This is a sealing structure diagram of Embodiment 1 of a vacuum-sealing two-part movable mold of this utility model.

[0020] Figure 2 This is a sealing structure diagram of Embodiment 2 of the vacuum-sealing two-part movable mold of this utility model.

[0021] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0022] In the diagram, 1. Mounting ring; 2. Upper guide ring; 3. Upper cover; 4. Upper side plate; 5. Upper sealing disc; 6. Upper movable block; 7. Lower guide ring; 8. Base; 9. Lower movable block; 10. Lower side plate; 11. Lower sealing disc; 12. Outer circle seal; 13. Gasket; 14. Pressure block; 15. Connector; 16. End face seal. Detailed Implementation

[0023] The following will be combined with the appendix Figures 1-3The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Example 1 like Figure 1 As shown, a vacuum-sealed two-part movable mold includes an upper mold and a lower mold. The upper mold includes an upper guide ring 2 and multiple upper movable blocks 6, with an mounting ring 1 on the upper part of the upper guide ring 2. The lower mold includes a lower guide ring 7 and multiple lower movable blocks 9, with a base 8 on the lower part of the lower movable blocks 9. The multiple upper movable blocks 6 and multiple lower movable blocks 9 together form the circumferential shape of a tire. An upper side plate 4 is provided on the inner side of the upper end of the upper movable block 6, and an upper cover 3 is connected to the upper end of the upper side plate 4 and the upper end of the upper movable block 6. A lower side plate 10 is provided on the inner side of the lower end of the lower movable block 9. The upper movable blocks 6, lower movable blocks 9, upper side plate 4, and lower side plate 10 together form the tire mold cavity. The lower mold is fixed to the worktable by the base 8, and the lower movable blocks 9 are evenly distributed inside the lower guide ring 7, forming the lower foundation of the tire cavity. The mounting ring 1 of the upper mold is connected to the external drive mechanism, driving the upper mold to move downward as a whole. As the upper and lower molds gradually approach each other, the upper guide ring 2 aligns with the lower guide ring 7, and the upper movable blocks 6 and lower movable blocks 9 move closer together, ultimately forming the circumferential shape of the tire. At the same time, the upper side plate 4 on the inner side of the upper end of the upper movable block 6 and the lower side plate 10 on the inner side of the lower end of the lower movable block 9 cooperate with each other to form a complete tire mold cavity together with the upper and lower movable blocks 9, providing space for tire forming.

[0026] The lower mold is provided with a vacuum port (not shown in the figure), and an upper sealing plate 5 is provided between the upper cover 3 and the mounting ring 1. The upper sealing plate 5 moves up and down with the mounting ring 1. A lower sealing plate 11 is provided between the lower guide ring 7 and the base 8. The lower sealing plate 11 does not open or close. Sealing structures are provided on the outer side of the upper sealing disc 5 and the mounting ring 1, the inner side of the upper sealing disc 5 and the upper cover 3, the outer side of the lower sealing disc 11 and the lower guide ring 7, the inner side of the lower sealing disc 11 and the base 8, and the mold closing surfaces of the upper guide ring 2 and the lower guide ring 7, for sealing after the two halves of the movable mold are closed.

[0027] During mold closing, the sealing structures between the outer side of the upper sealing disc 5 and the mounting ring 1, and between the inner side of the upper sealing disc 5 and the upper cover 3, respectively seal the gaps at the top of the upper mold; the sealing structures between the outer side of the lower sealing disc 11 and the lower guide ring 7, and between the inner side of the lower sealing disc 11 and the base 8, seal the gaps at the bottom of the lower mold; and the sealing structures at the mold closing surfaces of the upper guide ring 2 and the lower guide ring 7 seal the gaps at the joint of the upper and lower molds. Through multi-position sealing coordination, the mold cavity and key areas inside the mold form a completely sealed space, providing conditions for subsequent vacuuming.

[0028] After sealing is completed, the vacuum system is activated, and air is evacuated from the sealed tire mold cavity through the pre-set vacuum port on the lower mold. During the evacuation process, air, moisture, and other impurities inside the cavity are gradually expelled, creating a stable vacuum environment inside the cavity and preventing residual air from affecting tire quality during subsequent molding.

[0029] In a vacuum environment, the tire blank is vulcanized and formed in the tire mold cavity. During the forming process, the vacuum degree and a certain pressure of the cavity are continuously maintained to avoid the tire forming quality being affected by air pockets.

[0030] like Figure 1 , Figure 2 As shown, sealing structures are also provided between the mounting ring 1 and the upper guide ring 2, and between the base 8 and the lower side plate 10, which further ensures the sealing performance when the two movable molds are vacuumed.

[0031] like Figure 1 As shown, in this embodiment, outer circular seals 12 are used between the outer side of the upper sealing disc 5 and the mounting ring 1, between the inner side of the upper sealing disc 5 and the upper cover 3, between the outer side of the lower sealing disc 11 and the lower guide ring 7, between the inner side of the lower sealing disc 11 and the base 8, and on the mating surfaces of the upper guide ring 2 and the lower guide ring 7. An end face seal 16 is used between the mounting ring 1 and the upper guide ring 3. In this embodiment, an outer circular seal refers to a sealing form with a cylindrical surface or the side wall of a ring as the sealing surface. The sealing element is attached to the inner or outer wall surface of the circular component, and the sealing element is squeezed to make it tightly contact the mating surface of the mating component, thereby forming a sealing method.

[0032] The upper movable block 6 and the lower movable block 9 are both integral structures, or the upper movable block 6 and the lower movable block 9 are composed of a slider and a patterned block, with the patterned block fixed to the inside of the slider.

[0033] The vacuum port is located on the lower guide ring 7 or the lower sealing plate 11.

[0034] like Figure 3 As shown, the lower guide ring 7 has a pressure groove on the side near the lower sealing disc 11, and a pressure block 14 is provided in the pressure groove. The lower sealing disc 11 has a slot on the side near the lower guide ring 7. One end of the pressure block 14 extends into the slot and supports the lower sealing disc 11, forming a mechanical limiting structure. This ensures the stability of the connection between the lower sealing disc 11 and the lower guide ring 7 and prevents the lower sealing disc 11 from falling off when the lower mold is flipped.

[0035] The pressure block 14 is detachably connected to the lower guide ring 7 via a connector 15. In this embodiment, the pressure block 14 is connected to the lower guide ring 7 via screws.

[0036] like Figure 3 As shown, a gap is provided between the upper end face of the pressure block 14 and the lower end face of the groove of the lower sealing plate 11, providing buffer space for subsequent mold closing adjustment. A shim 13 is provided at the lower part of the lower guide ring 7. The shim 13 is used to adjust the height difference between the bottom of the lower guide ring and the bottom of the base. Since the connection surface between the lower movable block 9 and the lower guide ring 7 is a conical surface, by adding or removing the number of shims 13 at the lower part of the lower guide ring 7, the overall installation height of the lower guide ring 7 will change accordingly. Then, through the conduction effect of the conical surface, the lower movable block 9 is pushed to undergo radial displacement within the lower guide ring 7, thereby realizing the adjustment of the mold closing force of the upper mold and the lower mold, ensuring that the tire blank fits tightly into the cavity, improving the clarity of the tread pattern, the uniformity of the tire body density and the overall dimensional accuracy, and ensuring the tire forming quality.

[0037] The gap between the upper end face of the pressure block 14 and the lower end face of the groove of the lower sealing disc 11 is greater than or equal to 0.5 mm.

[0038] Example 2 Unlike Example 1, as Figure 2 As shown, an outer circular seal 12 is used between the outer side of the upper sealing disc 5 and the mounting ring 1, and between the outer side of the lower sealing disc 11 and the lower guide ring 7; an end face seal 16 is used between the inner side of the upper sealing disc 5 and the upper cover 3, between the inner side of the lower sealing disc 11 and the base 8, between the mounting ring 1 and the upper guide ring 3, and on the mating surfaces of the upper guide ring 2 and the lower guide ring 7; in this embodiment, the end face seal refers to a sealing form with a plane as the sealing surface, where the sealing element is sandwiched between two opposing planes, and the sealing element is compacted by the mold closing force or bolt pressure, thereby forming a sealing method.

[0039] The above content is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the structure of the utility model, they should all fall within the protection scope of this utility model.

Claims

1. A vacuum-sealed two-part movable mold, comprising an upper mold and a lower mold, wherein the upper mold comprises an upper guide ring (2) and a plurality of upper movable blocks (6), and the upper guide ring (2) is provided with an mounting ring (1); the lower mold comprises a lower guide ring (7) and a plurality of lower movable blocks (9), and the lower movable blocks (9) are provided with a base (8); the plurality of upper movable blocks (6) and the plurality of lower movable blocks (9) together form the circumferential shape of a tire, wherein the upper inner side of the upper movable block (6) is provided with an upper side plate (4), and the upper side plate (4) and the upper end of the upper movable block (6) are connected with an upper cover (3); the lower inner side of the lower movable block (9) is provided with a lower side plate (10), and the upper movable block (6), the lower movable block (9), the upper side plate (4), and the lower side plate (10) together form a tire mold cavity; Its features are, The lower mold is provided with a vacuum port, an upper sealing plate (5) is provided between the upper cover (3) and the mounting ring (1), and a lower sealing plate (11) is provided between the lower guide ring (7) and the base (8); Sealing structures are provided on the outer side of the upper sealing disc (5) and the mounting ring (1), the inner side of the upper sealing disc (5) and the upper cover (3), the outer side of the lower sealing disc (11) and the lower guide ring (7), the inner side of the lower sealing disc (11) and the base (8), and the mold-closing surfaces of the upper guide ring (2) and the lower guide ring (7) for sealing after the two movable mold halves are closed.

2. The vacuum-sealing two-part movable mold according to claim 1, characterized in that, A sealing structure is also provided between the mounting ring (1) and the upper guide ring (2), and between the base (8) and the lower side plate (10).

3. The vacuum-sealing two-part movable mold according to claim 2, characterized in that, The sealing structure adopts one or more of the following combinations: outer circle seal (12) or end face seal (16).

4. The vacuum-sealing two-part movable mold according to claim 1, characterized in that, The upper movable block (6) and the lower movable block (9) are both integral structures, or the upper movable block (6) and the lower movable block (9) are composed of a slider and a patterned block, with the patterned block fixed to the inside of the slider.

5. The vacuum-sealing two-part movable mold according to claim 1, characterized in that, The vacuum port is located on the lower guide ring (7) or the lower sealing plate (11).

6. A vacuum-sealing two-part movable mold according to any one of claims 1-5, characterized in that, The lower guide ring (7) has a pressure groove on the side near the lower sealing disc (11), and a pressure block (14) is provided in the pressure groove. The lower sealing disc (11) has a slot on the side near the lower guide ring (7). One end of the pressure block (14) extends into the slot and supports the lower sealing disc (11), forming a mechanical limiting structure.

7. A vacuum-sealing two-part movable mold according to claim 6, characterized in that, The pressure block (14) is detachably connected to the lower guide ring (7) via a connector (15).

8. A vacuum-sealing two-part movable mold according to claim 6, characterized in that, A gap is provided between the upper end face of the pressure block (14) and the lower end face of the groove of the lower sealing plate (11), and a gasket (13) is provided at the lower part of the lower guide ring (7) for adjusting the closing force of the upper mold and the lower mold.

9. A vacuum-sealing two-part movable mold according to claim 8, characterized in that, The gap between the upper end face of the pressure block (14) and the lower end face of the groove of the lower sealing disc (11) is greater than or equal to 0.5 mm.

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