Tire mold and manufacturing method of tire mold

Abstract

The invention belongs to the technical field of tire vulcanization molds, and particularly relates to a tire mold and a manufacturing method of the tire mold, the tire mold comprises mold assemblies and a driving assembly, the mold assemblies are used for performing uniform heating and pressurizing vulcanization treatment and pattern compression molding on the surface of a tire, and the driving assembly is used for synchronously driving all the mold assemblies to perform mold closing and mold opening. The air cavities communicating through the communicating grooves are formed in the pattern protrusions of the petal molds, and hot air circulation is conducted in the air cavities of the petal molds through the air pumps in the fan-shaped bases, so that the pattern protrusions and grooves are evenly heated through the air cavities in the petal molds; the vulcanization treatment of uniformly heating and pressurizing the tire and the uniform compression molding of patterns by the mold assembly are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of tire vulcanization molds, and in particular relates to a tire mold and a method for manufacturing the tire mold. Background Art

[0002] When the tire is vulcanized, a mold is needed to heat and pressurize the tire while pressing the pattern on the tire surface. The mold used includes an inner mold and an outer mold. The outer mold is generally composed of multiple fan-shaped molds and each fan-shaped mold moves radially. The outer mold moves radially outward to place the tire to be vulcanized, and the air moves radially inward to compress the tire.

[0003] The tire surface has a pattern composed of grooves and protrusions pressed out by an external mold. When the vulcanization temperature rises, the temperature rise is difficult to control. The published patent application number 201580027229.7 designs a mold with a heat regulator formed by different materials. The heat regulator can control the amount of heat received by the tire, but it depends on the specific tread pattern, the structure is not universal, and the cost of a single tire is relatively high.

[0004] In addition, after the sector molds move radially and contact each other, gaps are easily generated between adjacent sector molds due to processing accuracy or wear caused by long-term use, resulting in additional strip-shaped protrusions on the surface of the tire after vulcanization. The published patent application number 200880130115.5 has designed a synchronization structure that can better match the sector molds together, but the processing accuracy and wear of the synchronization structure itself will cause the sector molds to be out of sync, and thus cannot solve the problem of the sector molds being unable to align due to processing accuracy or wear.

[0005] The present invention designs a tire mold and a method for manufacturing the tire mold to solve the above problems. Summary of the Invention

[0006] Based on this, it is necessary to provide a tire mold and a method for manufacturing a tire mold to address the problems existing in the current tire surface vulcanization mold. The fan-shaped seat of the mold assembly in the present invention can be used as the mold body to cooperate with the petal molds of different patterns. The same fan-shaped seat is used to perform the vulcanization treatment of tires with different patterns, effectively reducing the cost of vulcanization treatment of a single tire. In the present invention, an air cavity connected by a connecting groove is opened in the pattern protrusion of the petal mold. The present invention circulates hot air into the air cavity of the petal mold through an air pump in the fan-shaped seat, so that the air cavity in the petal mold uniformly heats the protrusions and grooves of the pattern, which is beneficial for the mold assembly to perform uniform heating and pressurization vulcanization treatment on the tire and uniform pressing and molding of the pattern. The fan-shaped seat of the mold assembly and the flap mold installed on the fan-shaped seat in the present invention have several degrees of freedom that are not completely restricted, thereby ensuring that when the adjacent fan-shaped seats and the flap molds installed thereon are insufficiently processed or severely worn, they can be tightly fitted together after radial movement through cooperation with the first limit plate and the second limit plate fixed to the guide seat, so that all the fan-shaped seats and the flap molds installed thereon are finally aligned in a circle without the appearance of additional strip-shaped protrusions on the tire surface. The drive assembly for synchronously driving the flap molds on all the fan-shaped seats in the present invention does not require sufficient processing accuracy to achieve the final tight fitting of the flap molds on all the fan-shaped seats under the positioning of the first limit plate and the second limit plate, effectively reducing the cost of equipment production.

[0007] The above purpose is achieved through the following technical solutions: A tire mold for performing a vulcanization treatment and pattern pressing on a tire surface by heating and pressurizing, comprising: Several mold assemblies evenly distributed around a vertical axis are used to perform vulcanization treatment and pattern pressing on the tire surface by uniform heating and pressurizing. The mold assembly has the characteristics of being able to replace its inner wall pattern and uniformly heat the protrusions and grooves of the inner wall pattern. The mold assembly also has the characteristics of being able to complete a tight mold fit even when it is worn or the processing accuracy is insufficient.

[0008] The drive assembly is used to synchronously drive all mold components to close and open the mold.

[0009] In one embodiment, the mold assembly is arranged on a second bracket, and the second bracket is provided with a cylinder, and the top of the cylinder is connected to the top of the first bracket through a hydraulic cylinder.

[0010] In one embodiment, four first guide sleeves are evenly arranged on the outer circumference of the cylinder, and the first guide sleeves slide on the guide rod at the top of the first bracket in the vertical direction. The lower end of the guide rod is provided with a first limiting ring for limiting the movement range of the cylinder.

[0011] In one embodiment, the mold assembly includes a guide seat, the guide seat is arranged on the second bracket, a screw driven to rotate by the driving assembly is rotatably arranged on the guide seat, the axis of the screw and the axis of the second bracket are located in the same vertical plane, a first slide is slidably arranged in the guide seat and threadedly connected to the screw, a second guide sleeve is provided on the first slide, a second slide slides horizontally along the radial direction of the second bracket in the second guide sleeve and is provided with a first spring that drives the second slide to move toward the axis direction of the second bracket, a vertical rod is provided on the second slide, a sliding sleeve is slidably provided on the vertical rod in the vertical direction, a second spring that drives the sliding sleeve to move upward is provided on the vertical rod, and a support ear is provided on the sliding sleeve. The ball joint on the support ear is connected to the third slide, and the third slide slide slides in the slide groove on the outer arc surface of the fan-shaped seat around the axis of the second bracket. The two sides of the third slide are respectively connected to the corresponding side inner walls of the slide groove, and a fourth spring is connected to limit the movement of the third slide in the slide groove. The fan seat is coaxial with the second bracket, and three third springs that limit the rotation of the ball joint connection point are connected between the third slide and the sliding sleeve. The inner arc surface of the fan seat is provided with a replaceable arc-shaped flap mold coaxial with the fan block, and the inner arc surface of the flap mold is provided with a pattern composed of grooves and protrusions. The guide seat is connected to the second limit plate that cooperates with the upper end of the corresponding fan seat and the first limit plate that cooperates with the inner arc surface of the corresponding flap mold through the third bracket.

[0012] In one embodiment, a first air tube whose two ends are connected to its inner arc surface is provided in the fan-shaped seat, an air pump is provided on the first air tube, and several pairs of electric heating wires are provided in the fan-shaped seat for heating the first air tube near the first air tube. An air cavity is opened in the protrusion of the flap mold pattern, and adjacent air cavities are connected by connecting grooves. Two second air tubes connected to the air cavity are provided on the outer arc surface of the flap mold, and the two second air tubes are plugged into and matched with the two ends of the first air tube in a one-to-one manner.

[0013] In one embodiment, four plugs are symmetrically provided on the outer arc surface of the flap mold, and the plugs cooperate with the slots on the corresponding fan-shaped seat. Countersunk holes that are connected to the slots one by one are opened on the outer arc surface of the fan-shaped seat, and bolts that are threadedly connected to the corresponding plugs on the flap mold are provided in the countersunk holes.

[0014] In one embodiment, a second limiting ring and a limiting block for limiting the sliding range of the sliding sleeve are provided on the vertical rod, and two ends of the second spring are connected to the second limiting ring and the sliding sleeve respectively.

[0015] In one embodiment, the driving assembly includes a first motor and a second motor, and the first motor and the second motor are arranged in a cylinder. A ring sleeve is rotatably arranged in the central circular hole of the second bracket, which is driven to rotate by the first motor and is connected to the screw in the mold assembly. A first rotating shaft is rotatably arranged in the ring sleeve, which is driven to rotate by the second motor and is connected to the pump shaft of the air pump in the mold assembly.

[0016] In one embodiment, a first gear is provided on the output shaft of the first motor, and the first gear is engaged with a second gear provided on the ring sleeve. A fourth gear is provided on the output shaft of the second motor, and the fourth gear is engaged with a fifth gear on the first rotating shaft.

[0017] In one embodiment, the lower end of the ring sleeve is connected to a first gear ring through a first frame, the first gear ring is engaged with a third gear arranged on a screw in the mold assembly, the lower end of the first rotating shaft is connected to a second gear ring through a second frame, the second gear ring is engaged with a sixth gear, the sixth gear is arranged on a second rotating shaft, the second rotating shaft is rotatably arranged on a guide seat in the mold assembly, the second rotating shaft is connected to the pump shaft of the corresponding air pump through a soft shaft, and the two ends of the soft shaft are respectively arranged in the first shaft seat on the guide seat and the second shaft seat on the fan-shaped seat.

[0018] The flap molds in the tire mold are produced using metal 3D printing technology.

[0019] The beneficial effects of the present invention are: 1. The fan-shaped seat of the mold assembly in the present invention can be used as the mold body to cooperate with the petal molds of different patterns. The petal mold and the fan-shaped seat itself are processed with high precision, while the precision of the driving assembly that drives the fan-shaped seat to move is low. The first limit plate and the second limit plate used as positioning scales have high precision. The first limit plate and the second limit plate are easy to process and have low cost. At the same time, the same fan-shaped seat is used to perform vulcanization treatment on tires with different patterns, which effectively reduces the cost of vulcanization treatment of a single tire.

[0020] 2. In the present invention, an air cavity connected by a connecting groove is opened in the pattern protrusion of the petal mold. The present invention circulates hot air into the air cavity of the petal mold through the air pump in the fan-shaped seat, so that the air cavity in the petal mold can evenly heat the protrusions and grooves of the pattern, which is beneficial to the mold assembly to perform uniform heating and pressurizing vulcanization treatment on the tire and uniform pressing and molding of the pattern.

[0021] 3. The fan-shaped seat of the mold assembly in the present invention and the flap mold installed on the fan-shaped seat have several degrees of freedom that are not completely restricted, thereby ensuring that when the adjacent fan-shaped seats and the flap molds installed thereon are insufficiently processed or severely worn, they can be perfectly fitted together after radial movement through cooperation with the first limit plate and the second limit plate fixed to the guide seat, so that all the fan-shaped seats and the flap molds installed thereon can finally be aligned in the circle without the appearance of additional strip-shaped protrusions on the tire surface due to gaps caused by wear of the fan-shaped seats and the flap molds or insufficient processing accuracy after mold closing.

[0022] 4. The driving assembly for synchronously driving all the upper flap molds of the fan-shaped seat in the present invention does not require sufficient processing accuracy to achieve the final seamless mold closing of all the upper flap molds of the fan-shaped seat under the positioning of the first limit plate and the second limit plate, effectively reducing the cost of equipment production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 It is an overall top sectional view of the present invention; Figure 3 It is an overall side sectional view of the present invention; Figure 4 This is a cross-sectional view of the drive assembly and the mold assembly; Figure 5 is a schematic diagram of the mold assembly; Figure 6 is a first cross-sectional view of the mold assembly; Figure 7 is a second cross-sectional view of the mold assembly; Figure 8 is a third cross-sectional view of the mold assembly; Figure 9 It is a cross-sectional view of the connection between the sector seat and the petal mold in the mold assembly; Figure 10 It is a schematic diagram of the flap mold; Figure 11 is a first cross-sectional view of the flap mold; Figure 12 is a second cross-sectional view of the flap mold; Figure 13 It is a schematic diagram of the sector seat; Figure 14 It is the first cross-sectional view of the sector seat; Figure 15 is the second cross-sectional view of the sector seat; Name of the label in the figure: 101. First bracket; 102. Hydraulic cylinder; 103. Guide rod; 104. First limiting ring; 105. Cylinder; 106. First guide sleeve; 107. Second bracket; 200, mold assembly; 201, guide seat; 202, first shaft seat; 203, third bracket; 204, first limit plate; 205, second limit plate; 206, screw; 207, first slide; 208, second guide sleeve; 209, first spring; 210, second slide; 211, vertical rod; 212, second limit ring; 213, limit block; 214, second spring; 215, slide sleeve; 216, support lug 217, third slide seat; 218, third spring; 219, fourth spring; 220, fan-shaped seat; 221, slot; 222, countersunk hole; 223, slide groove; 224, first air pipe; 225, air pump; 226, pump shaft; 227, electric heating wire; 228, second shaft seat; 229, flap mold; 230, pattern; 231, air cavity; 232, connecting groove; 233, second air pipe; 234, plug; 300, drive assembly; 301, first motor; 302, first gear; 303, second gear; 304, ring; 305, first frame; 306, first ring gear; 307, third gear; 308, second motor; 309, fourth gear; 310, fifth gear; 311, first rotating shaft; 312, second frame; 313, second ring gear; 314, sixth gear; 315, second rotating shaft; 316, flexible shaft. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, indicating positions or relationships, are based on those shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or element referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] like Figure 1-15 As shown, a tire mold is used for performing a vulcanization treatment by heating and pressurizing the tire surface and pressing a pattern 230, comprising: A plurality of mold assemblies 200 evenly distributed around a vertical axis are used for performing vulcanization treatment by uniformly heating and pressurizing the tire surface and for press-molding the pattern 230. The mold assembly 200 has the characteristics of being able to replace its inner wall pattern 230 and making the protrusions and grooves of the inner wall pattern 230 evenly heated. The mold assembly 200 also has the characteristics of being able to complete a tight mold fit even when it is worn or the processing accuracy is insufficient.

[0028] The driving assembly 300 is used to synchronously drive all the mold assemblies 200 to close and open the mold.

[0029] In a further embodiment, Figure 1 、 Figure 3 As shown, the mold assembly 200 is set on the second bracket, and the second bracket is provided with a cylinder 105. The top of the cylinder 105 is connected to the top of the first bracket 101 through the hydraulic cylinder 102.

[0030] In a further embodiment, Figure 1 、 Figure 3 、 Figure 4 As shown, four first guide sleeves 106 are evenly arranged on the outer circumference of the cylinder 105. The first guide sleeves 106 slide on the guide rod 103 at the top of the first bracket 101 in the vertical direction. The lower end of the guide rod 103 is provided with a first limiting ring 104 for limiting the movement range of the cylinder 105.

[0031] In a further embodiment, Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8As shown, the mold assembly 200 includes a guide seat 201, which is arranged on the second bracket, and a screw 206 driven to rotate by the drive assembly 300 is rotatably arranged on the guide seat 201, and the axis of the screw 206 and the axis of the second bracket are located in the same vertical plane, and a first slide 207 threadedly connected to the screw 206 is slidably arranged in the guide seat 201, and a second guide sleeve 208 is provided on the first slide 207, and a second slide 210 is horizontally slid along the radial direction of the second bracket in the second guide sleeve 208 and is provided with a first spring 209 that drives the second slide 210 to move toward the axis direction of the second bracket, and a vertical rod 211 is provided on the second slide 210, and a sliding sleeve 215 is slidably provided on the vertical rod 211 along the vertical direction, and a second spring 214 that drives the sliding sleeve 215 to move upward is provided on the vertical rod 211, and a support ear 216 is provided on the sliding sleeve 215. The ball joint on the support ear 216 is connected to a third slide 217, and the third slide 217 slides around the axis of the second bracket in the slide groove 223 on the outer arc surface of the fan-shaped seat 220. Fourth springs 219 are connected between the two sides of the third slide 217 and the corresponding side inner walls of the slide groove 223 to limit the movement of the third slide 217 in the slide groove 223. The fan seat 220 is coaxial with the second bracket, and three third springs 218 are connected between the third slide 217 and the sleeve 215 to limit the rotation of the ball joint connection point. A replaceable arc-shaped flap mold 229 coaxial with the fan block is provided on the inner arc surface of the fan seat 220, and the inner arc surface of the flap mold 229 is provided with a pattern 230 consisting of grooves and protrusions. The guide seat 201 is connected to a second limit plate 205 that cooperates with the upper end of the corresponding fan seat 220 and a first limit plate 204 that cooperates with the inner arc surface of the corresponding flap mold 229 through the third bracket 203.

[0032] In a further embodiment, Figure 13 、 Figure 14 、 Figure 15 As shown, the fan-shaped seat 220 is provided with a first air pipe 224 with both ends connected to its inner arc surface, the first air pipe 224 is provided with an air pump 225, and the fan-shaped seat 220 is provided with a plurality of pairs of electric heating wires 227 for heating the first air pipe 224 near the first air pipe 224. An air cavity 231 is opened in the protrusion of the pattern 230 of the flap mold 229, and the adjacent air cavities 231 are connected by a connecting groove 232. Two second air pipes 233 connected to the air cavity 231 are provided on the outer arc surface of the flap mold 229, and the two second air pipes 233 are plugged into and matched with the two ends of the first air pipe 224 in a one-to-one manner.

[0033] In a further embodiment, Figure 9 、 Figure 10 、 Figure 11 、 Figure 12As shown, four plugs 234 are symmetrically provided on the outer arc surface of the flap mold 229, and the plugs 234 cooperate with the slots 221 on the corresponding fan-shaped seat 220. The outer arc surface of the fan-shaped seat 220 is provided with countersunk holes 222 which are connected to the slots 221 one by one, and the countersunk holes 222 are provided with bolts threadedly connected to the corresponding plugs 234 on the flap mold 229.

[0034] In a further embodiment, Figure 6 As shown, the vertical rod 211 is provided with a second limiting ring 212 and a limiting block 213 for limiting the sliding range of the sliding sleeve 215, and the two ends of the second spring 214 are connected to the second limiting ring 212 and the sliding sleeve 215 respectively.

[0035] In a further embodiment, Figure 4 、 7 As shown, the driving assembly 300 includes a first motor 301 and a second motor 308, and the first motor 301 and the second motor 308 are arranged in the cylinder 105. A ring sleeve 304 driven to rotate by the first motor 301 and connected to the screw 206 in the mold assembly 200 is rotatably arranged in the circular hole in the middle of the second bracket, and a first rotating shaft 311 driven to rotate by the second motor 308 and connected to the pump shaft 226 of the air pump 225 in the mold assembly 200 is rotatably arranged in the ring sleeve 304.

[0036] In a further embodiment, Figure 4 、 Figure 7 As shown, a first gear 302 is provided on the output shaft of the first motor 301, and the first gear 302 is engaged with a second gear 303 provided on the ring sleeve 304. A fourth gear 309 is provided on the output shaft of the second motor 308, and the fourth gear 309 is engaged with a fifth gear 310 on the first rotating shaft 311.

[0037] In a further embodiment, Figure 4 、 Figure 7 As shown, the lower end of the ring sleeve 304 is connected to the first ring gear 306 through the first frame 305, and the first ring gear 306 is engaged with the third gear 307 set on the screw 206 in the mold assembly 200. The lower end of the first rotating shaft 311 is connected to the second ring gear 313 through the second frame 312, and the second ring gear 313 is engaged with the sixth gear 314. The sixth gear 314 is set on the second rotating shaft 315, and the second rotating shaft 315 is rotatably set on the guide seat 201 in the mold assembly 200. The second rotating shaft 315 is transmission-connected to the pump shaft 226 of the corresponding air pump 225 through the soft shaft 316, and the two ends of the soft shaft 316 are respectively set in the first shaft seat 202 on the guide seat 201 and the second shaft seat 228 on the fan-shaped seat 220.

[0038] The fan-shaped seat 220 of the mold assembly 200 of the present invention can serve as the mold body and cooperate with the flap molds 229 of different patterns 230. The same fan-shaped seat 220 is used to perform the vulcanization treatment of tires with different patterns 230, effectively reducing the cost of vulcanization treatment of a single tire. In the present invention, the pattern 230 protrusion of the flap mold 229 is provided with an air cavity 231 connected by a connecting groove 232. The present invention circulates hot air into the air cavity 231 of the flap mold 229 through the air pump 225 in the fan-shaped seat 220, so that the air cavity 231 in the flap mold 229 uniformly heats the protrusions and grooves of the pattern 230, which is beneficial for the mold assembly 200 to perform uniform heating and pressurization vulcanization treatment on the tire and uniform pressing and molding of the pattern 230. The sector seats 220 of the mold assembly 200 of the present invention and the flap molds 229 mounted on the sector seats 220 have several degrees of freedom that are not completely restricted, thereby ensuring that when the processing precision of adjacent sector seats 220 and the flap molds 229 mounted thereon is insufficient or severe wear occurs, the sector seats 220 and the flap molds 229 mounted thereon can be tightly fitted together after radial movement by cooperating with the first limit plate 204 and the second limit plate 205 fixed to the guide seat 201, so that all sector seats 220 and the flap molds 229 mounted thereon can finally be aligned in a circular manner without the appearance of additional strip-shaped protrusions on the tire surface. The drive assembly 300 for synchronously driving the flap molds 229 on all sector seats 220 of the present invention does not require sufficient processing precision to achieve the final tightly fitting of the flap molds 229 on all sector seats 220 under the positioning of the first limit plate 204 and the second limit plate 205, effectively reducing the cost of equipment production.

[0039] The present invention uses metal 3D printing technology to produce the flap mold 229 in the mold assembly 200.

[0040] The operation process of the present invention is as follows: In the initial state, the first slide 207 in the mold assembly 200 is at its lowest limit position. The second slide 210 is extended to its limit outward from the second guide sleeve 208 under the action of the corresponding first spring 209. The slide sleeve 215 is abutted against the limit block 213 under the action of the corresponding second spring 214. The first spring 209 and the second spring 214 are both in a compressed state. The third slide 217 is in a balanced state under the action of the corresponding three third springs 218. The third slide 217 is located in the middle of the slide groove 223 under the action of the corresponding two fourth springs 219. The third spring 218 is in a stretched state, and the fourth spring 219 is in a compressed state. The sector seat 220 and the flap mold 229 in the mold assembly 200 are separated from the second limit plate 205 and the first limit plate 204, respectively. The sector seat 220 is circumferentially separated from the adjacent sector seat 220.

[0041] When the present invention is required to vulcanize the tire surface, the electric heating wire 227 in the mold assembly 200 is first connected to the power supply and the second motor 308 is started. The second motor 308 drives the sixth gear 314 on the guide seat 201 in the mold assembly 200 to rotate through the fourth gear 309, the fifth gear 310, the first rotating shaft 311, the second frame 312, and the second gear ring 313. The sixth gear 314 drives the mold assembly through the corresponding second rotating shaft 315, the flexible shaft 316 and the pump shaft 226. The air pump 225 in 200 is running, and the air pump 225 causes the air in the air cavity 231 of the flap mold 229 to circulate continuously through the first air pipe 224 in the fan-shaped seat 220. The air is fully heated by the surrounding electric heating wire 227 during the movement of the first air pipe 224. After the heated air enters the air cavity 231, it evenly heats the grooves and protrusions of the pattern 230 on the outside of the flap mold 229, which facilitates the flap mold 229 to perform uniform heating and pressurizing vulcanization treatment on the tire surface and pressurize the pattern 230.

[0042] Then, the tire is placed on the platform between all the mold assemblies 200 by the robot arm, and the hydraulic cylinder 102 is started to drive all the mold assemblies 200 to move downward synchronously so that all the mold assemblies 200 surround the tire. Then, the first motor 301 is started, and the first motor 301 drives the third gear 307 on the screw 206 in the mold assembly 200 to rotate through the first gear 302, the second gear 303, the ring 304, the first frame 305 and the first gear ring 306. The third gear 307 drives the screw 206 in the mold assembly 200 to rotate. The movable first slide 207 slides obliquely upward in the guide seat 201, and the first slide 207 in the mold assembly 200 drives the corresponding fan-shaped seat 220 and the flap mold 229 installed on the fan-shaped seat 220 to move synchronously through the second guide sleeve 208, the second slide 210, the vertical rod 211, the second spring 214, the slide sleeve 215, the support ear 216, and the third slide 217. The fan-shaped seats 220 in all the mold assemblies 200 perform radial mold closing movement during the rising process, and the flap mold 229 on the fan-shaped seat 220 clamps the tire and drives the tire upward to leave the platform.

[0043] If the sector seats 220 and the flap molds 229 are not worn or are sufficiently precise, then after all the sector seats 220 and flap molds 229 are closed, the first spring 209 and the second spring 214 are further compressed as the first slide 207 continues to rise, thereby providing pressure to close all the sector seats 220 and flap molds 229, effectively performing a uniformly heated and pressurized vulcanization treatment on the tire surface and forming the pattern 230. At this time, the state of the third spring 218 and the fourth spring 219 in the mold assembly 200 remains almost unchanged.

[0044] If the fan-shaped seat 220 and the flap mold 229 wear out during long-term use or lack precision during production, then, when all the fan-shaped seats 220 and the flap mold 229 are completed, as the first slide 207 continues to rise, the first spring 209 and the second spring 214 are further compressed, and the fan-shaped seat 220 and the flap mold 229 are adaptively adjusted under the action of the second limit plate 205 and the first limit plate 204, so that there will be no gaps between adjacent fan-shaped blocks and the flap mold 229 due to wear or lack of precision, ensuring that all the fan-shaped seats 220 and the flap mold 229 can complete the effective closing of the mold and uniformly heat and press vulcanize the tire surface and press the pattern 230. At this time, the third slide 217 is adjusted to a certain extent relative to the fan-shaped seat 220 and the lug 216 on the sliding sleeve 215 under the action of the corresponding third spring 218 and the fourth spring 219, and the third spring 218 and the fourth spring 219 change their states to a corresponding degree.

[0045] After the vulcanization treatment of the tire surface lasts for one hour, the first motor 301 is started to drive all the mold assemblies 200 to open the mold and separate from the tire, thereby completing the vulcanization treatment of the tire surface.

[0046] When the flap mold 229 on the fan-shaped seat 220 needs to be replaced, the bolts connecting the flap mold 229 and the fan-shaped seat 220 are removed to separate the flap mold 229 and the fan-shaped seat 220. At the same time, the two second air pipes 233 on the flap mold 229 are separated from the two ends of the first air pipe 224 in the fan-shaped seat 220. Then, the new flap mold 229 can be connected to the fan-shaped seat 220 by bolts. When the flap mold 229 and the fan-shaped seat 220 are connected, the two second air pipes 233 on the flap mold 229 are respectively connected to the two ends of the first air pipe 224 in the fan-shaped seat 220.

[0047] Under ideal processing conditions, the fan-shaped seat 220 in the adjacent mold assembly 200 and the flap mold 229 installed on the fan-shaped seat 220 will fit well together. Even if the processing accuracy is not enough, the fan-shaped seat 220 and the flap mold 229 installed on the fan-shaped seat 220 will eventually maintain the appropriate position under the positioning of the first limit plate 204 and the second limit plate 205 to form a perfect and seamless fit. The movement amplitude of each degree of freedom of the fan-shaped seat 220 is not very large, the displacement amplitude is less than 1 cm, and the swing or rotation amplitude is less than 5 degrees.

Claims

1. A tire mold for performing vulcanization treatment and pattern pressing on the tire surface by heating and pressurizing, characterized in that: include: Several mold assemblies evenly distributed around a vertical axis are used to perform uniform heating and pressurizing on the tire surface for vulcanization and pattern pressing. The mold assemblies have the characteristics of being able to replace the inner wall pattern and ensuring uniform heating of the protrusions and grooves of the inner wall pattern. The mold assemblies also have the characteristics of being able to complete the mold sewing even when they are worn or the processing accuracy is insufficient. The drive assembly is used to synchronously drive all mold components to close and open the mold.

2. A tire mold according to claim 1, characterized in that: The mold assembly is arranged on a second bracket, and the second bracket is provided with a cylinder, and the top of the cylinder is connected to the top of the first bracket through a hydraulic cylinder.

3. A tire mold according to claim 2, characterized in that: Four first guide sleeves are evenly arranged on the outer circumference of the cylinder. The first guide sleeves slide on the guide rod on the top of the first bracket in the vertical direction. The lower end of the guide rod is provided with a first limiting ring to limit the movement range of the cylinder.

4. A tire mold according to claim 2, characterized in that: The mold assembly includes a guide seat, which is arranged on the guide seat, and a screw driven by the driving assembly is rotatably arranged on the guide seat, and the axis of the screw and the axis of the second bracket are located in the same vertical plane, and a first slide seat is slidably arranged in the guide seat and threadedly connected to the screw, and a second guide sleeve is provided on the first slide seat, and a second slide seat slides horizontally along the radial direction of the second bracket in the second guide sleeve and is provided with a first spring that drives the second slide seat to move toward the axis direction of the second bracket, a vertical rod is provided on the second slide seat, and a sliding sleeve is provided on the vertical rod to slide in the vertical direction, and a second spring that drives the sliding sleeve to move upward is provided on the vertical rod, and a support ear is provided on the sliding sleeve, and the support ear The first clutch pedal is to be adjusted to the left of the pedal down and to allow the third pedal to move in a reverse direction, so that the third pedal can move in a reverse direction and the third pedal can move in a reverse direction.

5. A tire mold according to claim 4, characterized in that: A first air tube is provided in the fan-shaped seat with both ends connected to its inner arc surface, an air pump is provided on the first air tube, and several pairs of electric heating wires are provided in the fan-shaped seat for heating the first air tube near the first air tube. An air cavity is opened in the protrusion of the flap mold pattern, and adjacent air cavities are connected by connecting grooves. Two second air tubes connected to the air cavity are provided on the outer arc surface of the flap mold, and the two second air tubes are plugged into and matched with the two ends of the first air tube in a one-to-one manner.

6. A tire mold according to claim 4, characterized in that: Four plugs are symmetrically arranged on the outer arc surface of the flap mold, and the plugs cooperate with the slots on the corresponding fan-shaped seat. Countersunk holes that are connected to the slots one by one are opened on the outer arc surface of the fan-shaped seat, and bolts that are threadedly connected to the corresponding plugs on the flap mold are arranged in the countersunk holes.

7. The tire mold according to claim 4, characterized in that: The vertical rod is provided with a second limiting ring and a limiting block for limiting the sliding range of the sliding sleeve, and the two ends of the second spring are respectively connected to the second limiting ring and the sliding sleeve.

8. The tire mold according to claim 1, characterized in that: The driving assembly includes a first motor and a second motor, the first motor and the second motor are arranged in a cylinder, a ring sleeve driven by the first motor and connected to the screw in the mold assembly is rotatably arranged in the circular hole in the middle of the second bracket, and a first rotating shaft driven by the second motor and connected to the pump shaft of the air pump in the mold assembly is rotatably arranged in the ring sleeve; The lower end of the ring sleeve is connected to the first ring gear through the first frame, and the first ring gear is engaged with the third gear arranged on the screw in the mold assembly. The lower end of the first rotating shaft is connected to the second ring gear through the second frame, and the second ring gear is engaged with the sixth gear. The sixth gear is arranged on the second rotating shaft, and the second rotating shaft is rotatably arranged on the guide seat in the mold assembly. The second rotating shaft is connected to the pump shaft of the corresponding air pump through a soft shaft, and the two ends of the soft shaft are respectively arranged in the first shaft seat on the guide seat and the second shaft seat on the fan-shaped seat.

9. The tire mold according to claim 8, characterized in that: A first gear is provided on the output shaft of the first motor, and the first gear is engaged with a second gear provided on the ring sleeve. A fourth gear is provided on the output shaft of the second motor, and the fourth gear is engaged with a fifth gear on the first rotating shaft.

10. A method for manufacturing a tire mold according to any one of claims 1 to 9, characterized in that: The flap molds in the tire mold are produced using metal 3D printing technology.

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