Vacuum sealing device for two half molds

Abstract

According to the vacuum sealing device for the two half molds, in the device, the upper mold and the lower mold of the mold are each additionally provided with a lantern ring, so that the upper mold and the lower mold form a sealing structure, air in cavities of the two half molds can be removed through the sealing structures before tire vulcanization, and the exhaust problem does not need to be considered when the tire is vulcanized. According to the device, air clog and rubber hair are avoided, and the tire quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire and tire mold manufacturing technical field especially relates to a vacuum sealing device for two half molds. BACKGROUND

[0002] The surface quality of the tire is an important index to measure the technical strength of each tire manufacturer, and the tire tread pattern part is an important component of the tire, and the more beautiful the surface is, the more the consumers will like it, and each tire manufacturer is committed to the research of improving the tire tread pattern beauty. Now the tire pattern is more and more complex, and the tire vulcanization forming will cause the poor exhaust of the pattern root, and the tire tread will appear the lack of glue phenomenon, and the current solution is to process multiple exhaust holes on the mold tread pattern side, which will cause a large number of glue hairs on the tire after molding, and the glue hairs need to be removed subsequently. In order to reduce the appearance of glue hairs, various exhaust methods appear, and the use of vacuum mold is one of them.

[0003] In the existing vacuum technology, the mold is sealed in the fully closed state, and there is no guiding and positioning device during sealing, and the closed environment is formed after the mold is closed, and the vacuum operation is performed. But the tire blank has been attached to the mold, and the contact and extrusion between them form multiple independent cavities with air on the mold, and the air in these cavities cannot be discharged with the vacuum operation. The disadvantage is that the tire blank and the mold are in the air pocket phenomenon after closing, which causes the lack of glue on the surface of the vulcanized tire, and the exhaust holes or exhaust inserts must be set to exhaust, and there are still about 70% of the glue hairs or exhaust marks on the surface of the tire, which still need to be removed manually.

[0004] After using the technology of the patents ZL2020202909895 and CN2023211225018, the glue hairs can be completely eliminated, but the tires produced by using the flexible mold only account for a part in the production process of the tire, and many tires are produced by using the two half molds. For the dynamic vacuum of the two half molds, it is still a problem to be solved. The present patent provides a dynamic vacuum technology for the two half molds.

[0005] The above information disclosed in the background art section is only used to enhance the understanding of the background of the utility model, and therefore can contain information that does not constitute prior art known by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a vacuum sealing device for two half molds of tire, in the device, a sleeve ring is added to the upper mold and the lower mold respectively, so that the upper mold and the lower mold form a sealing structure, and the air in the two half mold cavities can be removed before tire vulcanization through the sealing structure, so that the tire vulcanization does not have to consider the exhaust problem. The device avoids the appearance of air pocket and glue hair, and improves the quality of the tire.

[0007] In order to achieve the above object, the utility model provides the following technical scheme:

[0008] A vacuum sealing device for tire two half moulds, comprising,

[0009] The sleeve ring is divided into upper sleeve ring (1) and lower sleeve ring (4),

[0010] The upper sleeve ring is installed on the upper mould (7) or the vulcanizing machine upper plate, the sleeve ring sealing ring (2) is installed on it, is used for sealing the upper and lower mould, is positioned with the lower sleeve ring through the positioning device (3), the sleeve ring is equipped with the air extraction hole (5) for vacuum air extraction and emptying,

[0011] The lower sleeve ring is installed on the lower mould (6) or the vulcanizing machine lower plate, and is sealed with the sleeve ring sealing ring, is used for sealing the upper and lower mould, is positioned with the upper sleeve ring through the positioning device, and the sleeve ring is equipped with the air extraction hole for vacuum air extraction and emptying,

[0012] The upper and lower sleeve rings can be installed with only one set, or multiple sets,

[0013] When the sealing height of the upper and lower sleeve rings is insufficient, the multiple telescopic structure is used to make it reach the reasonable sealing height.

[0014] The positioning device can adopt the positioning column mode, the positioning block mode, the overall positioning mode of outer periphery, the segmented positioning mode of outer periphery, the telescopic guide sleeve positioning mode and the guide rail positioning mode.

[0015] The fixing mode of the sleeve ring includes thread fixing, clasp spring fixing, magnetic force fixing, interference fixing, key fixing, pin fixing and buckle fixing.

[0016] The sleeve ring sealing ring can be designed on the lower sleeve ring, so that it is sealed with the upper sleeve ring.

[0017] The sleeve ring sealing ring is arranged at the outer circle of the upper sleeve ring or the inner circle of the lower sleeve ring, and when the multiple telescopic structure is used, the sealing ring also needs to be arranged in the telescopic structure to ensure the sealing property.

[0018] One or more sealing rings are arranged on the upper sleeve ring, and the cross-sectional shape of the sealing ring can be circular, square, with guide shape, special shape, and the sealing ring can be an integral structure with the sleeve ring or a split replacement structure.

[0019] After the positioning device starts to cooperate and position during the mould closing process, the sealing ring starts to cooperate and seal, and the height of the cooperation and positioning is greater than the height of the cooperation and sealing.

[0020] The sealing mode between the sleeve ring and the mould or the vulcanizing machine can be end face sealing or radial sealing.

[0021] The upper sleeve and the upper mold of the two half-molds can be a split structure or an integral structure, the lower sleeve and the lower mold of the two half-molds can be a split structure or an integral structure, the upper sleeve and the upper plate of the curing machine can be a split structure or an integral structure when installed on the curing machine, and the lower sleeve and the lower plate of the curing machine can be a split structure or an integral structure.

[0022] The sealing ring on the sleeve can adopt a general sealing ring, an inflatable sealing ring with a self-contained structure, a spring sealing ring, a flexible graphite sealing ring, or an elastic metal sealing ring. The sleeve can be circular, oval, square, polygonal, or special-shaped according to the shape of the mating surface of the upper cover plate and the upper cover plate sealing ring.

[0023] Positioning guide wear-resistant parts can be installed on the sleeve.

[0024] The multiple telescopic structure can be made to have a self-contained sealing effect when used, and no sealing ring is needed.

[0025] When the multiple telescopic structure is used, the telescopic drive of the structure can adopt a spring, an oil cylinder, an air cylinder, or a motor drive, or can utilize the tension and pressure during mold opening and closing to drive through a mechanical structure.

[0026] A guide hole can be arranged on the sleeve to ensure uniform movement of the sleeve during installation and disassembly.

[0027] An electronic control system can be installed on the sleeve to monitor the use of the sleeve at any time.

[0028] In the above technical solution, the vacuum sealing device for the two half-molds of the tire has the following beneficial effects:

[0029] 1. The mold structure device for curing the tire under negative pressure removes the rubber hairs on the tire, significantly improves the appearance of the tire, makes it possible to produce high-end tires with zero rubber hairs, and improves the competitiveness of the tire.

[0030] 2. The pattern and the characters have no rubber hairs, and the performance effect is excellent. The tire mold does not need to be processed with exhaust holes, saving the processing and assembly cost.

[0031] 3. The tire mold has no air holes, and the mold does not need to be repeatedly disassembled due to blockage of the air holes by rubber or impurities, saving mold loading and unloading time and improving production efficiency.

[0032] 4. The tire production process does not need to set up a rubber hair removal process, saving cost.

[0033] 5. Without rubber hairs, the weight of the tire blank can be reduced accordingly, saving rubber and reducing raw material cost.

[0034] 6. The tire mold has no air holes, and more structure space can be added in the pattern block.

[0035] 7. When vacuumizing, the pattern block is not in contact with the tire blank, and no closed small space is generated, so no air trapping phenomenon occurs, and a perfect tire surface is formed. The air trapping phenomenon caused by unreasonable design of air holes is avoided, and the effect is particularly obvious when the product is first tested. The air exhaust position on the tire can be designed with more structures to improve the performance of the entire tire pattern.

[0036] 8. When designing the pattern, the air exhaust problem can be ignored, which increases the diversity of pattern design, and the tire mold steel sheet does not need to be designed with a reinforcing hole, thereby saving the cost of steel sheet manufacturing and reducing the demolding force of the product. The effect is particularly obvious for steel-intensive molds such as snow tires.

[0037] 9. When maintaining the mold, the operation of air holes or replacing the air hole sleeve is not needed, so that the working intensity of the mold maintenance is reduced. Without processing the air exhaust system, the manufacturing cycle of the mold is shortened by 20-40 working hours, and the entire cycle is shortened by about 15%. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0039] Figure 1 It is a mold and sleeve ring structure diagram of the present application.

[0040] Figure 2 It is a sleeve ring multiple telescopic structure diagram of the present application.

[0041] Figure 3 It is a lower sleeve ring installation sealing ring structure diagram of the present application.

[0042] BRIEF DESCRIPTION OF DRAWINGS: 1. Upper sleeve ring 2. Sleeve ring sealing ring 3. Positioning device 4. Lower sleeve ring 5. Air hole 6. Lower mold 7. Upper mold 8. Support rod 9. Spring 10. Telescopic ring DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0045] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0047] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0051] Implementation Case 1, such as Figure 1 As shown, the present invention provides a vacuum sealing device for a tire two-part mold, comprising:

[0052] The collar consists of an upper collar (1) and a lower collar (4), which are installed on the upper mold (7) and the lower mold (6). The upper collar is sealed to the lower collar by the collar sealing ring (2). The collar is equipped with a positioning device (3) for positioning and is positioned by the guide post and the guide sleeve.

[0053] The vacuum sealing device used for tire mold halves ensures that the mold cavity is sealed before it is fully closed, thanks to the pre-mold closing actions and unique sealing method. Through the synchronized operation of the vacuum pump and vulcanizing equipment, the air vacuum level within the sealed cavity, the mold's movement, the relative position of the tire blank and the mold, the operation of the vulcanizing machine's central mechanism, and the tire bladder pressure are all coordinated. Ultimately, when the tire mold is closed, there is absolutely no air between the entire mold surface and the tire blank. This enables the production of zero-rubber tires without processing pores. During the mold closing process, if the mold is not fully closed, multiple positioning devices activate. After positioning, the sealing element reaches a sealed cavity state. At this point, a negative pressure vacuum operation is performed to collect all the air within the mold cavity, creating a negative pressure vacuum state. The mold is then fully closed, and the tire is vulcanized.

[0054] As shown in Figure 2 The vacuum sealing device for the two half-molds of the tire comprises,

[0055] The sleeve ring is composed of an upper sleeve ring (1) and a lower sleeve ring (4) and is installed on the upper mold (7) and the lower mold (6), the upper sleeve ring is provided with a plurality of telescopic mechanisms, the telescopic mechanisms are composed of telescopic rings (10), springs (9) and supporting rods (8) and are sealed with the lower sleeve ring through sleeve ring sealing rings installed on the telescopic rings (10), the sleeve ring is provided with positioning devices (3) for positioning and is positioned through guide columns and guide sleeves.

[0056] The vacuum sealing device for the two half-molds of the tire has the action before the tire mold is closed and the unique sealing mode, so that the mold cavity is in the sealed state before being completely closed, through the synchronous action of vacuumizing and the vulcanization equipment, the air vacuum degree in the closed cavity, the action of the mold, the relative position of the tire blank and the mold, the action of the center mechanism of the vulcanization machine and the tire capsule pressure are synchronously matched, and finally the complete mold surface and the tire blank are completely free of air when the tire mold is closed. Thus, the production of the zero rubber hair tire is realized without processing the air hole. During the closing process of the mold, the telescopic rings are extended out of the upper sleeve ring positioning devices to start working under the action of the springs when the mold is not closed in place, the sealing members on the telescopic rings reach the sealed cavity state with the lower sleeve ring after the positioning is completed, at this time, the negative pressure vacuumizing operation is performed, the air in the mold cavity is completely collected, the mold cavity reaches the negative pressure vacuum state, and the telescopic rings are pressed back to the closed state through the lower sleeve ring when the mold is closed downward, at this time, the mold is completely closed, and the tire is vulcanized.

[0057] As shown in Figure 3 The vacuum sealing device for the two half-molds of the tire comprises,

[0058] The sleeve ring is composed of an upper sleeve ring (1) and a lower sleeve ring (4) and is installed on the upper mold (7) and the lower mold (6), the upper sleeve ring is provided with a plurality of telescopic mechanisms, the telescopic mechanisms are composed of telescopic rings (10), springs (9) and supporting rods (8) and are sealed with the lower sleeve ring through sleeve ring sealing rings installed on the telescopic rings (10), the sleeve ring is provided with positioning devices (3) for positioning and is positioned through guide columns and guide sleeves.

[0059] During the closing process of the mold, the plurality of positioning devices start to work, the sealing members reach the sealed cavity state after the positioning is completed, at this time, the negative pressure vacuumizing operation is performed, the air in the mold cavity is completely collected, the mold cavity reaches the negative pressure vacuum state, and the mold is completely closed at this time, and the tire is vulcanized.

[0060] In the above technical scheme, the vacuum sealing device for the two half-molds of the tire has the following beneficial effects:

[0061] 1. The mold structure device of the vulcanized tire under negative pressure state removes the rubber burr on the tire, makes the appearance of the tire obviously better, makes the production of zero-rubber-burr high-end tire possible, and improves the competitiveness of the tire.

[0062] 2. The pattern and the font are free of rubber burrs, and the performance effect is excellent. The tire mold does not need to be processed with exhaust holes, saving the processing and assembly cost.

[0063] 3. There is no air hole on the tire mold, and the mold does not need to be repeatedly disassembled due to the blockage of the air hole by the rubber material or impurities, saving the mold up and down machine time and improving the production efficiency.

[0064] 4. The tire production process does not need to set up a rubber burr removal process, saving the cost.

[0065] 5. Without rubber burrs, the weight of the tire blank can be reduced accordingly, saving rubber and reducing raw material cost.

[0066] 6. There is no air hole on the tire mold, which can increase more structure space in the pattern block.

[0067] 7. When vacuumizing, the pattern block is not in contact with the tire blank, which will not produce airtight small space and will not produce air trapping phenomenon, forming a perfect tire surface. Avoid the air trapping phenomenon caused by unreasonable design of air holes, especially the effect is particularly obvious when the product is first tested. The exhaust position on the tire can be designed with more structures to improve the performance of the entire tire pattern.

[0068] 8. When designing the pattern, the exhaust problem can be ignored, increasing the diversity of pattern design, and the tire mold steel sheet does not need to be designed with a reinforcing bar hole, saving the cost of steel sheet manufacturing and reducing the demolding force of the product. The effect is particularly obvious for steel-intensive molds such as snow tires.

[0069] 9. When the mold is taken out for maintenance, it does not need to be operated again for the air hole or the replacement of the air hole sleeve, reducing the working intensity of the mold maintenance. Without processing the exhaust system, the manufacturing cycle of the mold is shortened by 20-40 working hours, and the entire cycle is shortened by about 15%.

[0070] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0071] The above has only described certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature, and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A vacuum sealing device for a two-part mold, characterized in that, It includes, The collar consists of an upper collar (1) and a lower collar (4). The upper collar is installed on the upper mold (7) or the upper plate of the vulcanizing machine. A collar sealing ring (2) is installed on it to seal the upper and lower molds. It is positioned with the lower collar by a positioning device (3). The collar is provided with an air extraction hole (5) for vacuum extraction and venting. The lower collar is installed on the lower mold (6) or the lower plate of the vulcanizing machine. It cooperates with the collar sealing ring to seal the upper and lower molds. It is positioned with the upper collar by a positioning device. The collar is provided with an air extraction hole for vacuum extraction and venting. Multiple sets of upper and lower collars can be installed. When the sealing height of the upper and lower collars is insufficient, a multi-expansion structure is used to achieve a reasonable sealing height.

2. The vacuum sealing device for a two-part mold according to claim 1, characterized in that, The positioning device can adopt positioning column method, positioning block method, overall peripheral positioning method, segmented peripheral positioning method, telescopic guide sleeve positioning method, and guide rail positioning method.

3. A vacuum sealing device for a two-part mold according to claim 1, characterized in that, The collar can be fixed by thread, snap ring, magnetic force, interference fit, key, pin, or snap fastener.

4. A vacuum sealing device for a two-part mold according to claim 1, characterized in that, The sealing ring can be designed on the lower ring so that it can cooperate with the upper ring for sealing.

5. A vacuum sealing device for a two-part mold according to claim 1, characterized in that, The sealing ring is located at the outer circle of the upper ring or the inner circle of the lower ring. When a multi-expansion structure is used, a sealing ring is required in the expansion structure to ensure sealing.

6. A vacuum sealing device for a two-part mold according to claim 1, characterized in that, One or more sealing rings are installed on the upper collar. The cross-sectional shape of the sealing ring can be circular, square, guide-shaped, or irregular. The sealing ring can be an integral structure with the collar. The sealing ring can be a self-contained inflatable sealing ring, spring sealing ring, flexible graphite sealing ring, or elastic metal sealing ring.

7. A vacuum sealing device for a two-part mold according to claim 1, characterized in that, The sealing ring only begins to engage and seal after the positioning device starts to engage and position during the mold closing process, and the height of the engagement and positioning is greater than the height of the engagement and sealing.

8. A vacuum sealing device for a two-part mold according to claim 1, characterized in that, The sealing method between the collar and the mold or vulcanizing machine can be end face sealing.

9. A vacuum sealing device for a two-part mold according to claim 1, characterized in that, When a multi-extension structure is used, the extension and retraction of the structure can be driven by a spring, hydraulic cylinder, pneumatic cylinder, or motor.

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