Heat-conducting exhaust outer ring mold

Abstract

The utility model discloses a kind of heat conduction exhaust outer ring mould, it is related to tire manufacturing technical field, including pedestal and protective ring, the pedestal is provided with outer ring mould group, outer ring mould group includes the multiple mould blocks of annular array distribution, multiple exhaust holes are all set on each mould block;The pedestal is slidably provided with the multiple moving plate of annular array distribution, moving plate is provided with dredging rod, by setting moving plate and its on dredging rod sliding on pedestal, and using connecting piece makes moving plate and mould block linkage, when stripping, moving plate moves not only can pull mould block to complete stripping, can also synchronously drive dredging rod to insert exhaust hole, the glue whisk or stopper that residual in hole due to rubber material infiltration fracture in vulcanization process is ejected, realize the automatic dredging of exhaust hole, ensure that exhaust hole is kept unobstructed after each vulcanization period, guarantee the exhaust stability and vulcanization quality when continuous production.

Description

Technical Field

[0001] This utility model relates to the field of tire manufacturing technology, specifically to a heat-conducting and exhaust outer ring mold. Background Technology

[0002] In the automotive tire manufacturing process, the heat-conducting and venting outer ring mold plays two key roles: First, its excellent thermal conductivity helps to evenly transfer heat during vulcanization, ensuring that the rubber material completes the vulcanization and cross-linking reaction fully and consistently within the mold, thereby stabilizing the tire's physical properties and shape. Second, through a precise venting structure (such as vent holes or vent grooves), it quickly removes air and excess rubber from the mold cavity during rubber injection or compression, preventing defects such as porosity, insufficient rubber, or scorching on the tire surface. Together, these factors improve the finished tire's quality, density, and overall appearance.

[0003] Patent CN206426326U discloses a tire forming mold, including an upper mold, a lower mold, tread blocks, an upper side plate, and a lower side plate. The outer wall of the tread blocks has protrusions, and a lightweight heat-conducting block is placed between adjacent protrusions. The side walls of the tread blocks have grooves, and the grooves on two adjacent side walls form an exhaust port. A fixing post is placed inside the groove. The side walls of the tread blocks also have micropores communicating with the exhaust ports, with the axis of the micropores flush with the axis of the exhaust ports. All tread blocks have the same structure and can be freely replaced. The exhaust ports are used to release gases during the vulcanization process. The lightweight heat-conducting blocks can be made of aluminum or other materials, which reduces the overall weight of the tire mold and improves heat conduction and dissipation efficiency.

[0004] In existing technologies such as those mentioned above, gas release during the vulcanization process is achieved by relying on venting holes. However, this method has inherent drawbacks: during the high-pressure vulcanization stage, rubber inevitably seeps into the venting holes to form "rubber whiskers." When the tire is demolded, these rubber whiskers often break due to stress concentration at the root, and their residue blocks the venting holes. On the one hand, this requires frequent shutdowns for mold cleaning, reducing production efficiency. On the other hand, the blocked venting holes hinder the gas discharge during the subsequent vulcanization process, which can easily lead to secondary defects such as cavitation and insufficient rubber in the tire, making it difficult to meet the needs of continuous and high-quality production. Utility Model Content

[0005] The purpose of this invention is to provide a heat-conducting and exhaust outer ring mold to address the shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat-conducting and venting outer ring mold, comprising a base and a protective ring rotating on the base, wherein an outer ring mold assembly is provided on the base, the outer ring mold assembly comprising multiple mold blocks arranged in a ring array, each mold block having multiple vent holes; multiple movable plates arranged in a ring array are slidably disposed on the base, each movable plate being provided with a dredging rod, and each movable plate being connected to a corresponding mold block via a connector, the movable plates moving pull the mold blocks to demold and dredge the vent holes.

[0007] Furthermore, the connector includes a fixing plate fixed to the base, and a scissor cross bracket is provided on the fixing plate, which is disposed between the moving plate and the mold block.

[0008] Furthermore, a long strip groove plate is fixedly connected to one side of the movable plate, and a long strip groove plate is fixedly connected to one side of the mold block. The two ends of the scissor cross frame slide in the corresponding long strip groove plate and the long strip groove plate respectively.

[0009] Furthermore, each of the movable plates is provided with a connecting plate, and the other end of each connecting plate is rotatably connected to the inner ring of the protective ring.

[0010] Furthermore, each of the aforementioned mold blocks is made of a metal material with good thermal conductivity.

[0011] Furthermore, each mold block has a heat-conducting groove inside, and the heat-conducting grooves between adjacent mold blocks are interconnected.

[0012] Furthermore, the vent holes on each mold block correspond to the unblocking rods on the moving plate, and the cross-sectional radius of the vent holes is greater than that of the unblocking rods.

[0013] In the above technical solution, the present invention provides a heat-conducting and venting outer ring mold. By setting a movable plate that slides on the base and a dredging rod on it, and using a connecting piece to link the movable plate with the mold block, the movable plate can not only pull the mold block to complete the demolding during demolding, but also simultaneously drive the dredging rod to insert into the vent hole. This pushes out the rubber residue or blockages left in the hole due to the rubber material seeping in and breaking during the vulcanization process, thus achieving automatic venting of the vent hole. This effectively avoids frequent shutdowns for cleaning caused by vent hole blockage, significantly reduces manual maintenance costs, and ensures that the vent hole remains unobstructed after each vulcanization cycle, preventing defects such as air pockets and insufficient rubber in subsequent tires. This ensures the stability of venting and the quality of vulcanization during continuous production. Furthermore, the use of a metal material with good thermal conductivity and interconnected heat-conducting grooves further improves the uniform heat transfer efficiency during the vulcanization process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 An exploded view of the structural connections of the protective ring, the movable plate, and the mold block provided in an embodiment of this utility model; Figure 3 This is an exploded view of the connection between the movable plate and the mold block structure provided in an embodiment of the present utility model; Figure 4 A cross-sectional view of the mold block structure provided in an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Base; 2. Protective ring; 3. Mold block; 4. Vent hole; 5. Moving plate; 6. Unblocking rod; 7. Fixing plate; 8. Scissor cross rack; 9. Long strip groove plate one; 10. Long strip groove plate two; 11. Connecting plate; 12. Heat conduction groove. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-4This utility model provides a heat-conducting and exhaust outer ring mold, including a base 1 and a protective ring 2 rotating on the base 1. The base 1 serves as the supporting foundation for the entire mold. The central area of ​​the base 1 provides a stable working platform for tire vulcanization. The central position mainly houses the inner ring mold, which is an existing mature technology and will not be described in detail here. The base 1 needs to be equipped with a drive source (such as a motor or cylinder) to drive the protective ring 2 to rotate (rotate around the axis of the base 1). This is used to control the rotation of the protective ring 2 when necessary. The base 1 is equipped with... An outer ring mold assembly is provided, comprising multiple mold blocks 3 arranged in a circular array. When the mold blocks 3 are closed, they together form a complete tire outer ring mold cavity. Each mold block is provided with multiple vent holes 4, which are used to promptly expel air and volatile gases from the mold cavity during rubber injection and vulcanization, preventing defects such as air holes, insufficient rubber, or scorching on the tire surface. Multiple movable plates 5 arranged in a circular array are slidably mounted on the base 1. Each movable plate 5 is equipped with a drain rod 6, and each movable plate 5 is connected by a connector. Connected to the corresponding mold block 3, the moving plate 5 moves to pull the mold block 3 to demold and clear the vent holes 4. Each moving plate 5 corresponds to one mold block 3. The clearing rods 6 are fixedly set on the moving plate 5, and their number and position correspond one-to-one with the vent holes 4 on the mold block 3. Moreover, the axis of the clearing rods 6 is collinear with the axis of the vent holes 4. The function of the clearing rods 6 is to insert into the vent holes 4 as the moving plate 5 moves outward in the later stage of the demolding action, and push out the broken glue or blockages remaining in the vent holes 4 from the inside to the outside, so as to achieve drainage. Automatic unblocking of vent 4 avoids manual cleaning. The moving plate 5 is the power transmission medium for demolding and unblocking actions. One side of it is connected to the protective ring 2 through the connecting plate 11, and the other side is connected to the mold block 3 through the connecting piece. When the protective ring 2 drives the moving plate 5 to slide outward radially, the moving plate 5 pulls the mold block 3 outward through the connecting piece to achieve demolding. On the other hand, it drives the unblocking rod 6 on it to move outward synchronously, ready to insert into the vent 4. The structural design of the moving plate 5 ensures the precise synchronization of the demolding and unblocking actions.

[0019] The connecting component includes a fixed plate 7 fixed to the base 1, with a scissor cross bracket 8 mounted on the fixed plate 7. The scissor cross bracket 8 is positioned between the movable plate 5 and the mold block. A first elongated slotted plate 9 is fixedly connected to one side of the movable plate 5, and a second elongated slotted plate 10 is fixedly connected to one side of the mold block 3. The two ends of the scissor cross bracket 8 slide within the corresponding first elongated slotted plate 9 and second elongated slotted plate 10, respectively. The fixed plate 7 is fixed to the base 1, serving as a support point for the scissor cross bracket 8. The scissor cross bracket 8 is positioned between the movable plate 5 and the mold block 3, with its two ends slidably connected within the first elongated slotted plate 9 and second elongated slotted plate 10, respectively. The first elongated slotted plate 9 is fixed to the side of the movable plate 5, and the second elongated slotted plate 10 is fixed to the side of the mold block 3. When the movable plate 5 slides, the two ends of the scissor cross bracket 8 slide within the two elongated slotted plates and change angles, thereby transmitting the movement of the movable plate 5 to the mold block 3. The connector has a floating connection feature, which can compensate for the motion error between the moving plate 5 and the mold block 3, avoid jamming caused by rigid connection, and realize the linkage between demolding and unblocking.

[0020] Each movable plate 5 is provided with a connecting plate 11. The other end of each connecting plate 11 is rotatably connected to the inner ring of the protective ring 2. The inner ring of the protective ring 2 is rotatably connected to each movable plate 5 through the connecting plate 11. Its core function is to convert its own circular motion into the radial linear motion of the movable plate 5. When the external drive source drives the protective ring 2 to rotate, all connecting plates 11 are pulled or pushed at the same time, thereby driving all movable plates 5 to slide outward or inward synchronously along the radial direction of the base 1. The protective ring 2 ensures the consistency of the actions of multiple mold blocks 3 during the demolding and mold closing process, and avoids mold jamming or tire deformation caused by the asynchronous movement of individual mold blocks 3.

[0021] Each mold block 3 is made of a metal material with good thermal conductivity, specifically aluminum alloy or copper alloy, which can quickly absorb and transfer the heat of vulcanization, so that the rubber material in the mold cavity is heated evenly, ensuring that the vulcanization reaction is full and consistent, and shortening the vulcanization cycle. Each mold block 3 has a heat conduction groove 12 inside, and the heat conduction grooves 12 between adjacent mold blocks 3 are interconnected. The entire heat conduction groove 12 channel forms a heat medium channel around the mold cavity. This channel can be connected to an external heat source (such as steam, heat transfer oil or electric heating element), so that the heat is quickly and evenly distributed in the circumference, avoiding local overheating or overcooling, thereby improving the quality consistency of tire vulcanization.

[0022] The vent holes 4 on each mold block 3 correspond to the unblocking rods 6 on the moving plate 5, and the cross-sectional radius of the vent holes 4 is larger than that of the unblocking rods 6 to ensure that the unblocking rods 6 can be inserted smoothly without getting stuck. The vent holes 4 play a role in venting during vulcanization, but they will inevitably be seeped into by the rubber material during the high-pressure stage to form "rubber whiskers". When demolding, the insertion of the unblocking rods 6 can push out the rubber whiskers or blockages remaining in the holes, so that the vent holes 4 can be unblocked again.

[0023] In the above technical solution, firstly, at the start of the tire vulcanization operation, each mold block 3 is in a closed state on the base 1, collectively forming a complete tire outer ring mold cavity. The green tire blank is placed in the mold cavity and pressurized and heated. During vulcanization, the air in the mold cavity and the volatile gases generated by the heated rubber are discharged outward through the vent holes 4 on each mold block 3 to prevent the tire from developing cavitation or rubber defects. At the same time, an external heat source is introduced into the interconnected heat conduction grooves 12, which, combined with the rapid heat transfer of the high thermal conductivity metal material, ensures that the temperature distribution of the entire mold cavity is uniform, ensuring that the rubber material completes the vulcanization and cross-linking reaction fully and consistently. During the high-pressure vulcanization stage, some molten rubber will inevitably be squeezed into the vent holes 4, forming tiny "rubber whiskers." When vulcanization is complete and demolding is required, the external drive source drives the protective ring 2 to rotate. The protective ring 2 drives all the moving plates 5 to slide outward synchronously along the radial direction of the base 1 through the connecting plate 11. When the moving plate 5 moves outward, on the one hand, the scissor cross bracket 8 on the connecting piece—that is, the fixed plate 7—slides and changes angle within the long slot plate 9 and the long slot plate 10 respectively, transmitting the radial movement of the moving plate 5 to the radial outward movement of the mold block 3, thereby causing each mold block 3 to open synchronously and separate from the already formed tire outer ring, completing the demolding action; on the other hand, the unblocking rod 6 on the moving plate 5 moves outward synchronously with the moving plate 5. When the demolding action is nearing completion, the unblocking rod 6 is inserted into the corresponding vent hole 4 one by one from the inside. Since the cross-sectional radius of the vent hole 4 is larger than the cross-sectional radius of the unblocking rod 6, the unblocking rod 6 can pass smoothly through the vent hole 4, pushing out the broken glue or blockages that were previously left in the hole from the inside to the outside, so that the vent hole 4 is unobstructed; after the demolding and unblocking actions are completed, the protective ring 2 rotates in the opposite direction, driving the moving plate 5 and the mold block 3 to reset, and enter the next vulcanization cycle.

[0024] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A heat-conducting and venting outer ring mold, comprising a base and a protective ring rotating on the base, characterized in that: The base is provided with an outer ring mold assembly, which includes multiple mold blocks arranged in a ring array, and each mold block has multiple vent holes. Multiple movable plates arranged in a circular array are slidably disposed on the base. Each movable plate is provided with a connecting plate. The other end of each connecting plate is rotatably connected to the inner ring of the protective ring. A long groove plate is fixedly connected to one side of the movable plate, and a long groove plate is fixedly connected to one side of the mold block. The two ends of the scissor cross frame slide in the corresponding long groove plate and long groove plate respectively. The movable plate is equipped with a dredging rod, and each movable plate is connected to the corresponding mold block through a connector. The connector includes a fixed plate fixed on the base. The fixed plate is equipped with a scissor cross frame, which is located between the movable plate and the mold block. The movable plate moves to pull the mold block to demold and dredge the vent hole.

2. The heat-conducting and exhaust outer ring mold according to claim 1, characterized in that, Each of the mold blocks is made of a metal material with good thermal conductivity.

3. The heat-conducting and exhaust outer ring mold according to claim 1, characterized in that, Each of the mold blocks has a heat-conducting groove inside, and the heat-conducting grooves between adjacent mold blocks are interconnected.

4. The heat-conducting and exhaust outer ring mold according to claim 1, characterized in that, The vent holes on each mold block correspond to the unblocking rods on the moving plate, and the cross-sectional radius of the vent holes is greater than that of the unblocking rods.

Images