Non-pneumatic tire tread vulcanization mold

Abstract

This invention relates to the field of tire vulcanization mold technology and discloses a vulcanization mold for a pneumatic tire tread, comprising: an upper side plate adapted to be connected to the upper hot plate of a vulcanizing machine; a lower side plate adapted to be connected to the lower hot plate of a vulcanizing machine; an inner mold assembly including a first inner module and a second inner module arranged alternately along the circumference, the first inner module and the second inner module being respectively slidably connected to the lower side plate along the radial direction; a first connecting assembly connected to the upper side plate, the first connecting assembly including a first lever corresponding to the first inner module and a second lever corresponding to the second inner module, the first lever having a first guide groove, the first inner module being connected to a first mating part, the second lever having a second guide groove, the second inner module being connected to a second mating part, the first mating part being slidably engaged with the first guide groove, and the second mating part being slidably engaged with the second guide groove; and an external tread pattern block connected to the upper side plate and the lower side plate via the second connecting assembly.

Description

Technical Field

[0001] This invention relates to the field of tire vulcanization mold technology, specifically to a vulcanization mold for pneumatic tire treads. Background Technology

[0002] When vulcanizing the tread of pneumatic tires, the inner surface requires high-precision and stable support as well as high surface flatness. Therefore, compared with traditional bladders, rigid inner molds are more suitable for internal support. However, traditional rigid inner molds have complex structures, and due to the different structures and movement methods of movable mold vulcanizing machines and flat vulcanizing machines, the rigid inner molds used on the two types of vulcanizing machines cannot be interchanged for vulcanization, often requiring complex modifications or new manufacturing.

[0003] In addition, the external patterned blocks of the vulcanizing mold cannot be used interchangeably due to the different structures and movement methods of the two vulcanizing machines. Summary of the Invention

[0004] In view of this, the present invention provides a tire tread vulcanizing mold that does not require inflation, so as to solve the problem that the rigid inner mold in the prior art cannot be used simultaneously with the flexible mold vulcanizing machine and the flat vulcanizing machine.

[0005] This invention provides a vulcanizing mold for a pneumatic tire tread, comprising: The upper side plate is suitable for connection with the upper hot plate of the vulcanizing machine; The lower side plate is suitable for connection with the lower hot plate of the vulcanizing machine; The inner mold assembly includes a first inner module and a second inner module arranged alternately in the circumferential direction, and the first inner module and the second inner module are respectively slidably connected to the lower side plate in the radial direction; A first connecting component is connected to the upper side plate. The first connecting component includes a first lever corresponding to the first inner module and a second lever corresponding to the second inner module. The first lever has a first guide groove. The first inner module is connected to a first mating part. The second lever has a second guide groove. The second inner module is connected to a second mating part. The first mating part is slidably engaged with the first guide groove, and the second mating part is slidably engaged with the second guide groove, so that the mold opening includes a first mold opening stage and a second mold opening stage. In the first mold opening stage, one of the first inner module and the second inner module slides radially inward before the other. In the second mold opening stage, the first inner module and the second inner module slide radially inward simultaneously, so that the radial travel of the later moving inner module is L1 and the radial travel of the earlier moving inner module is L2, where L1 < L2. The externally formed patterned block is connected to the upper side plate and the lower side plate through a second connecting assembly, so that the externally formed patterned block can slide radially outward when the mold is opened.

[0006] Beneficial effects: During mold opening, the hot plate on the vulcanizing machine drives the upper side plate to move upward, and the upper side plate drives the first and second levers to move upward synchronously. The first lever has a first guide groove, the second lever has a second guide groove, the first inner module is connected to a first mating part, and the second inner module is connected to a second mating part. One of the first and second inner modules slides radially inward before the other. The first mating part slides in conjunction with the first guide groove, and the second mating part slides in conjunction with the second guide groove. This ensures that during the first mold opening stage, one of the first and second inner modules slides radially inward before the other. During the second mold opening stage, both the first and second inner modules slide radially inward simultaneously. This results in the radial travel of the later-moving inner module being L1, and the radial travel of the earlier-moving inner module being L2, where L1 < L2. This prevents interference between the first and second inner modules during radial inward sliding, ensuring smooth movement of both modules. Simultaneously, through the setting of the second connecting component, during mold opening, the outer molded tread block slides radially outward, which can evenly separate the outer molded tread block from the tire tread, making it easier to remove the vulcanized tire. During mold closing, the hot plate on the vulcanizing machine drives the upper side plate to move downward, and the movement of the first inner module and the second inner module is the opposite of that during mold opening to close the mold, and the movement of the outer molded tread block is the opposite of that during mold opening to close the mold.

[0007] Therefore, the vulcanizing mold for pneumatic tire treads, through the arrangement of the first lever, the second lever, the first mating part, the second mating part, and the second connecting component, enables the inner mold component and the outer molded pattern block to open and close when the upper side plate moves up and down driven by the hot plate on the vulcanizing machine. Thus, it can be used simultaneously on both movable mold vulcanizing machines and flat vulcanizing machines without the need for additional manual operation.

[0008] In one optional embodiment, from top to bottom, the first guide groove includes a first vertical section and a first inclined section, and the second guide groove includes a second inclined section. From top to bottom, both the first inclined section and the second inclined section are inclined toward the direction close to the tire axis. The length of the first inclined section is X1, and the angle between the axis of the first inclined section and the vertical line is θ1, L1 = X1*sinθ1. The length of the second inclined section is X2, and the angle between the axis of the second inclined section and the vertical line is θ2, L2 = X2*sinθ2. L2 - L1 ≥ the thickness of the first inner module.

[0009] Beneficial effects: During mold opening, the hot plate on the vulcanizing machine drives the upper side plate to move upward, and the upper side plate drives the first lever and the second lever to move upward synchronously. The first lever has a first guide groove, and the second lever has a second guide groove. From top to bottom, the first guide groove includes a first vertical section and a first inclined section, and the second guide groove includes a second inclined section. During the upward movement of the first lever, the first mating part moves along the first vertical section first. During this process, the first mating part will not be displaced radially, so the first inner module remains stationary. The second mating part moves along the second inclined section. Since the second inclined section is inclined towards the direction closer to the tire axis from top to bottom, the second mating part moves radially inward. The second mating part drives the second inner module to slide radially inward, so that in the first mold opening stage, the second inner module slides radially inward before the first inner module. When the first mating component enters the first inclined section, the second mating component remains in the second inclined section. Driven by the upper side plate, the first and second levers continue to move upwards. The first mating component moves along the first inclined section, and the second mating component moves along the second inclined section, achieving simultaneous radial inward sliding of the first and second inner modules during the second mold opening stage. By ensuring that L2-L1 ≥ the thickness of the first inner module, interference between the first and second inner modules during radial inward sliding can be prevented.

[0010] In one alternative implementation, X1 < X2, θ1 = θ2.

[0011] Beneficial effects: Since the length of the first inclined segment is less than the length of the second inclined segment, and the inclination angles of the first and second inclined segments are the same, it can be ensured that during the first mold opening stage, the second inner module slides radially inward before the first inner module, and during the second mold opening stage, the first inner module and the second inner module move synchronously.

[0012] In one optional embodiment, the first guide groove further includes a second vertical section disposed at the lower end of the first inclined section, and the second guide groove further includes a third vertical section disposed at the lower end of the second inclined section. The second vertical section and the third vertical section have equal lengths and both have lower end openings. The first mating member is adapted to leave the first guide groove through the lower end opening, and the second mating member is adapted to leave the second guide groove through the lower end opening.

[0013] Beneficial effects: The first guide groove also includes a second vertical section located at the lower end of the first inclined section, and the second guide groove also includes a third vertical section located at the lower end of the second inclined section. The second and third vertical sections are of equal length and both have lower openings. During the synchronous upward movement of the first and second levers driven by the upper side plate, when the first mating component enters the second vertical section and the second mating component enters the third vertical section, the first and second mating components no longer move radially inward until the first mating component leaves the first guide groove through the lower opening and the second mating component leaves the second guide groove through the lower opening. The mold then opens, facilitating the removal of the tire. During mold closing, the second vertical section facilitates the smooth entry of the first mating component into the first guide groove, and the third vertical section facilitates the smooth entry of the second mating component into the second guide groove.

[0014] In one alternative embodiment, both the first mating component and the second mating component are bearings.

[0015] Beneficial effects: Both the first and second mating parts are bearings, which can ensure smooth movement within the first and second guide grooves, thereby enabling the first and second inner modules to slide smoothly radially.

[0016] In one optional embodiment, the first connecting assembly includes an upper support member, which is fixedly connected to the upper side plate. The first lever and the second lever are connected to the lower side of the upper support member. The outer periphery of the upper support member is provided with a first abutting portion. When the pneumatic tire tread vulcanizing mold is in the closed state, the first abutting portion abuts against the inner side of the inner mold assembly.

[0017] Beneficial effects: The upper support is fixedly connected to the upper side plate. The first and second levers are connected to the lower side of the upper support. When the mold opens, the hot plate on the vulcanizing machine drives the upper side plate to move upward. The upper side plate, through the upper support, drives the first and second levers to move upward synchronously. By setting a first abutment part on the outer periphery of the upper support, when the pneumatic tire tread vulcanizing mold is closed, the first abutment part abuts against the inner side of the inner mold assembly. This improves the roundness accuracy of the inner mold assembly and positions the inner mold assembly, preventing the roundness of the inner mold assembly from exceeding tolerance and preventing radial displacement of the inner mold assembly due to rubber expansion during the tire vulcanization process.

[0018] In one optional embodiment, the first connecting assembly further includes a support block and a lower support member. The upper support member is connected to the lower support member through the support block. The lower support member has a second abutment portion on its outer periphery. When the pneumatic tire tread vulcanizing mold is in the closed state, the second abutment portion abuts against the inner side of the inner mold assembly. The lower support member has a clearance groove arranged circumferentially. The first lever and the second lever are disposed through the clearance groove.

[0019] Beneficial effects: When the pneumatic tire tread vulcanizing mold is closed, the first and second abutting parts simultaneously abut against the inner side of the inner mold assembly, which can further position the inner mold assembly, improve the roundness accuracy of the inner mold assembly, and improve the tire vulcanization quality. The upper support is connected to the lower support via a support block. The lower support is provided with a circumferentially arranged clearance groove. The first and second levers pass through the clearance groove, so that the upper support, support block, lower support, and the first and second levers are connected as a whole, which can prevent the first and second levers from shaking during up and down movement.

[0020] In one optional embodiment, when the pneumatic tire tread vulcanizing mold is in the closed state, the adjacent first inner module and the second inner module abut circumferentially and radially inward, the two adjacent sides of the first inner module and the second inner module gradually contract, and the two adjacent sides of the second inner module and the first inner module gradually expand.

[0021] Beneficial effects: When the vulcanizing mold for the pneumatic tire tread is closed, the adjacent first and second inner modules abut circumferentially, forming a continuous and complete rigid inner support surface on the outer side of the inner mold assembly. This ensures uniform stress on the inner surface of the tread, eliminates seam defects, and guarantees molding accuracy and flatness. Radially inward, the adjacent sides of the first and second inner modules gradually contract, while the adjacent sides of the second and first inner modules gradually expand. This facilitates the second inner module sliding radially inward before the first inner module during the first mold opening stage, and ensures that the second inner module's radial inward sliding does not interfere with the first inner module, improving the smoothness of the second inner module's movement.

[0022] In one alternative implementation, the first inner module and the second inner module are slidably engaged with the lower side plate via guide components.

[0023] Beneficial effects: The first inner module and the second inner module are slidably engaged with the lower side plate through the guide component. The guide component can guide the movement of the first inner module and the second inner module, ensuring smooth movement of the first inner module and the second inner module, and ensuring smooth mold opening and closing.

[0024] In one alternative implementation, the second connection component includes: A guide ring is connected to the upper side plate and extends circumferentially; The tread block guide strip is fixed to the inner side of the guide ring. The inner side of the tread block guide strip is inclined and tilted from top to bottom in a direction away from the tire axis. The outer molded tread block slides in cooperation with the inner side of the tread block guide strip. A fixing hook is fixed to the lower end of the external shaped pattern block. The lower side plate is provided with a groove. The side wall of the groove near the tire axis is provided with a barb. The fixing hook is adapted to abut against the lower side of the barb and slide along the lower side of the barb. After the fixing hook is disengaged from the barb, it is adapted to leave the lower side plate through the top opening of the groove.

[0025] Beneficial effects: The tread block guide strip is fixed to the inner side of the guide ring. The inner side of the tread block guide strip is inclined and tilts from top to bottom away from the tire axis. The outer shaped tread block slides with the inner side of the tread block guide strip. The fixing hook is fixed to the lower end of the outer shaped tread block. The lower side plate has a groove. The side wall of the groove near the tire axis has a barb. The fixing hook is adapted to abut against the lower side of the barb and slide along the lower side of the barb. When the mold is opened, the hot plate on the vulcanizing machine drives the upper side plate to move upward. The upper side plate drives the guide ring and the tread block guide strip to move upward synchronously. Since the fixing hook abuts against the lower side of the barb in the lower side plate, the outer shaped tread block is constrained by the barb through the fixing hook and cannot move upward. Therefore, it slides down relative to the inner side of the tread block guide strip, realizing that the outer shaped tread block slides outward radially, so that the outer shaped tread block is evenly separated from the tire tread. When the outer tread block moves the fixing hook to the point where the fixing hook disengages from the barb, the outer tread block is no longer constrained by the barb. Driven by the tread block guide strip, it moves upward along with the upper side plate, disengaging from the lower side plate, making it easier to remove the vulcanized tire.

[0026] In one optional embodiment, the outer side of the externally shaped patterned block is provided with a sliding groove, the patterned block guide strip is slidably disposed in the sliding groove, and the lower end of the patterned block guide strip is provided with a limiting member. After the fixing hook disengages from the barb, the limiting member is used to restrict the externally shaped patterned block from sliding downward relative to the patterned block guide strip.

[0027] Beneficial effects: By setting a groove on the outside of the outer shaped pattern block, the pattern block guide strip can be slidably set in the groove, which can guide the movement direction of the outer shaped pattern block. By setting a limiting member at the lower end of the pattern block guide strip, when the fixing hook disengages from the barb, the limiting member restricts the outer shaped pattern block from sliding downward relative to the pattern block guide strip, which can ensure that the outer shaped pattern block can move upward together with the pattern block guide strip, guide ring, and upper side plate, so as to separate the outer shaped pattern block from the lower side plate. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of the vulcanizing mold for the pneumatic tire tread of this invention in a closed state, according to an embodiment of the invention. Figure 2 This is a cross-sectional view of the vulcanizing mold for the pneumatic tire tread of an embodiment of the present invention during the first mold opening stage. Figure 3 This is a cross-sectional view of the vulcanizing mold for the pneumatic tire tread of this invention during the second mold opening stage. Figure 4 This is a cross-sectional view of the vulcanizing mold for the pneumatic tire tread of this invention when the mold is opened. Figure 5 This is a top view of the inner mold assembly of the pneumatic tire tread vulcanizing mold in the closed state according to an embodiment of the present invention. Figure 6 This is a top view of the inner mold assembly after the mold has been opened.

[0030] Explanation of reference numerals in the attached figures: 1. Upper side plate; 2. Lower side plate; 201. Groove; 202. Barb; 3. First inner module; 4. Second inner module; 5. First lever; 501. First guide groove; 5011. First vertical section; 5012. First inclined section; 5013. Second vertical section; 6. Second lever; 601. Second guide groove; 6011. Second inclined section; 6012. Third vertical section; 7. First mating part; 8. Second mating part; 9. External patterned block; 901. Slide groove; 10. First connecting rod; 11. Second connecting rod; 12. Upper support; 1201. First abutment part; 13. Support block; 14. Lower support; 1401. Second abutment part; 15. T-block; 16. Guide ring; 17. Patterned block guide strip; 18. Fixing hook; 19. Limiting part. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, a vulcanizing mold for a pneumatic tire tread is provided, comprising an upper side plate 1, a lower side plate 2, an inner mold assembly, a first connecting assembly, and an outer forming pattern block 9.

[0037] The upper side plate 1 is adapted to connect with the upper hot plate of the vulcanizing machine; the lower side plate 2 is adapted to connect with the lower hot plate of the vulcanizing machine; the inner mold assembly includes a first inner module 3 and a second inner module 4 arranged alternately in the circumferential direction, and the first inner module 3 and the second inner module 4 are respectively slidably connected to the lower side plate 2 in the radial direction; the first connecting assembly is connected to the upper side plate 1, and the first connecting assembly includes a first lever 5 corresponding to the first inner module 3 and a second lever 6 corresponding to the second inner module 4, the first lever 5 is provided with a first guide groove 501, the first inner module 3 is connected with a first mating part 7, and the second lever 6 is provided with a second guide groove 501. The groove 601 connects the second inner module 4 to the second mating part 8. The first mating part 7 slides with the first guide groove 501, and the second mating part 8 slides with the second guide groove 601, so that the mold opening includes a first mold opening stage and a second mold opening stage. In the first mold opening stage, one of the first inner module 3 and the second inner module 4 slides radially inward before the other. In the second mold opening stage, the first inner module 3 and the second inner module 4 slide radially inward simultaneously, so that the radial travel of the later moving inner module 3 and the earlier moving inner module 4 is L1, and the radial travel of the earlier moving inner module 4 is L2. Figure 6 As shown, L1 < L2; the externally formed patterned block 9 is connected to the upper side plate 1 and the lower side plate 2 through a second connecting assembly to enable the externally formed patterned block 9 to slide radially outward during mold opening. Preferably, the width of the first guide groove 501 is greater than the width of the first mating part 7, and the width difference is less than 2 mm, more preferably less than 0.5 mm. Preferably, the width of the second guide groove 601 is greater than the width of the second mating part 8, and the width difference is less than 2 mm, more preferably less than 0.5 mm.

[0038] In this embodiment, during mold opening, the hot plate on the vulcanizing machine drives the upper side plate 1 to move upward. The upper side plate 1 drives the first lever 5 and the second lever 6 to move upward simultaneously. The first lever 5 has a first guide groove 501, and the second lever 6 has a second guide groove 601. The first inner module 3 is connected to a first mating part 7, and the second inner module 4 is connected to a second mating part 8. One of the first inner module 3 and the second inner module 4 slides radially inward before the other. The first mating part 7 slides in contact with the first guide groove 501, and the second mating part 8 slides in contact with the second guide groove 601. The sliding fit allows one of the first inner module 3 and the second inner module 4 to slide radially inward before the other during the first mold opening stage. During the second mold opening stage, both inner modules slide radially inward simultaneously. This ensures that the radial travel of the later-moving inner module 3 is L1, and the radial travel of the earlier-moving inner module 4 is L2, where L1 < L2. This prevents interference between the inner modules during radial inward sliding, ensuring smooth movement. Simultaneously, the second connecting component allows the outer tread block 9 to slide radially outward during mold opening, ensuring even separation from the tire tread and facilitating the removal of the vulcanized tire. During mold closing, the hot plate on the vulcanizing machine drives the upper side plate 1 downward. The movements of the first inner module 3 and the second inner module 4 are reversed during mold opening, and the movement of the outer tread block 9 is also reversed during mold closing.

[0039] Therefore, the vulcanizing mold for pneumatic tire treads, through the arrangement of the first lever 5, the second lever 6, the first mating part 7, the second mating part 8 and the second connecting component, enables the inner mold component and the outer forming pattern block 9 to open and close when the hot plate on the vulcanizing machine drives the upper side plate 1 to move up and down. Thus, it can be used simultaneously on both the movable mold vulcanizing machine and the flat vulcanizing machine without the need for additional manual operation.

[0040] It should be noted that the first inner module 3 and the second inner module 4 are rigid inner modules, and the materials are aluminum alloy, stainless steel and other metal materials.

[0041] In one specific embodiment, when the airless tire tread vulcanizing mold is in the closed state, the outer side of the first inner module 3 and the outer side of the second inner module 4 form a closed curved surface that closely matches the tire tread, and a cavity for receiving the vulcanized tread is formed between the outer forming pattern block 9 and the inner mold assembly.

[0042] In one embodiment, from top to bottom, the first guide groove 501 includes a first vertical section 5011 and a first inclined section 5012, and the second guide groove 601 includes a second inclined section 6011. From top to bottom, both the first inclined section 5012 and the second inclined section 6011 are inclined towards a direction close to the tire axis. Figure 4As shown, the length of the first inclined segment is X1, the angle between the axis of the first inclined segment 5012 and the vertical line is θ1, L1 = X1*sinθ1, the length of the second inclined segment 6011 is X2, the angle between the axis of the second inclined segment 6011 and the vertical line is θ2, L2 = X2*sinθ2, and L2-L1 ≥ the thickness of the first inner module 3.

[0043] In this embodiment, during mold opening, the hot plate on the vulcanizing machine drives the upper side plate 1 to move upward. The upper side plate 1 drives the first lever 5 and the second lever 6 to move upward simultaneously. The first lever 5 is provided with a first guide groove 501, and the second lever 6 is provided with a second guide groove 601. From top to bottom, the first guide groove 501 includes a first vertical section 5011 and a first inclined section 5012, and the second guide groove 601 includes a second inclined section 6011. During the upward movement of the first lever 5, the first mating part 7 first moves along the first vertical section 5011. During this process, the first mating part 7 will not be displaced radially. Therefore, the first inner module 3 is radially limited and remains stationary by the first vertical section 5011, while the second mating part 8 moves along the second inclined section 6011. Since the second inclined section 6011 is inclined towards the direction closer to the tire axis from top to bottom, the second mating part 8 moves radially inward. The second mating part 8 drives the second inner module 4 to slide radially inward, so that in the first mold opening stage, the second inner module 4 slides radially inward before the first inner module 3. When the first mating part 7 enters the first inclined section 5012, the second mating part 8 is still located in the second inclined section 6011. The first lever 5 and the second lever 6 continue to move upward under the drive of the upper side plate 1. The first mating part 7 moves along the first inclined section 5012, and the second mating part 8 moves along the second inclined section 6011, so that in the second mold opening stage, the first inner module 3 and the second inner module 4 slide radially inward simultaneously. By ensuring that L2-L1 is greater than or equal to the thickness of the first inner module 3, it can be ensured that the first inner module 3 and the second inner module 4 will not interfere with each other when sliding radially inward.

[0044] In a preferred embodiment, X1 < X2, θ1 = θ2.

[0045] In this embodiment, since the length of the first inclined segment 5012 is less than the length of the second inclined segment 6011, and the inclination angles of the first inclined segment 5012 and the second inclined segment 6011 are the same, it can be ensured that in the first mold opening stage, the second inner module 4 slides radially inward before the first inner module 3, and in the second mold opening stage, the first inner module 3 and the second inner module 4 move synchronously.

[0046] In one specific embodiment, the tilt angle of the first tilting segment 5012 and the second tilting segment 6011 (the angle between the axis of the first tilting segment 5012 and the second tilting segment 6011 and the vertical plane) is preferably 15°-20°.

[0047] In one specific embodiment, the tilt angle of the first tilt segment 5012 and the second tilt segment 6011 is 18°.

[0048] In one embodiment, the first guide groove 501 further includes a second vertical section 5013 disposed at the lower end of the first inclined section 5012, and the second guide groove 601 further includes a third vertical section 6012 disposed at the lower end of the second inclined section 6011. The second vertical section 5013 and the third vertical section 6012 have the same length and both have a lower end opening. The first mating member 7 is adapted to leave the first guide groove 501 through the lower end opening, and the second mating member 8 is adapted to leave the second guide groove 601 through the lower end opening.

[0049] In this embodiment, the first guide groove 501 further includes a second vertical section 5013 located at the lower end of the first inclined section 5012, and the second guide groove 601 further includes a third vertical section 6012 located at the lower end of the second inclined section 6011. The second vertical section 5013 and the third vertical section 6012 are of equal length and both have lower openings. During the process of the upper side plate 1 driving the first lever 5 and the second lever 6 to move upward synchronously, when the first mating part 7 enters the second vertical section 5013 and the second mating part 8 enters the third vertical section 6012, the first mating part 7 and the second mating part 8 no longer move radially inward until the first mating part 7 leaves the first guide groove 501 through the lower opening of the first guide groove 501 and the second mating part 8 leaves the second guide groove 601 through the lower opening of the second guide groove 601. The mold opens, making it easy to remove the tire. During mold closing, the second vertical section 5013 facilitates the smooth entry of the first mating part 7 into the first guide groove 501, and the third vertical section 6012 facilitates the smooth entry of the second mating part 8 into the second guide groove 601.

[0050] In other alternative embodiments, it is also possible to omit the second vertical segment 5013 and the third vertical segment 6012.

[0051] In one embodiment, both the first mating part 7 and the second mating part 8 are bearings.

[0052] In this embodiment, the first mating part 7 and the second mating part 8 are both bearings, which can ensure smooth movement within the first guide groove 501 and the second guide groove 601, thereby enabling the first inner module 3 and the second inner module 4 to slide smoothly in the radial direction.

[0053] In other alternative embodiments, the first mating member 7 and the second mating member 8 may be rollers or circular sliders.

[0054] In one specific embodiment, the first inner module 3 is fixed with a first connecting rod 10, and a first mating part 7 is disposed at the end of the first connecting rod 10. The second inner module 4 is fixedly connected with a second connecting rod 11, and a second mating part 8 is disposed at the end of the second connecting rod 11. Both the first connecting rod 10 and the second connecting rod 11 are horizontally arranged.

[0055] More specifically, the first connecting rod 10 can be connected to the first mounting groove on the inner side of the first inner module 3 by screws, and the second connecting rod 11 can be connected to the second mounting groove on the inner side of the second inner module 4 by screws.

[0056] Specifically, the first lever 5 and the second lever 6 are provided with through grooves, the outer ends of which extend to the outer surfaces of the first lever 5 and the second lever 6, respectively. The inner ends of the through grooves are connected to the first guide groove 501 and the second guide groove 601, respectively. The lower end of the through groove has an opening. When the first mating part 7 moves along the first guide groove 501 and the second mating part 8 moves along the second guide groove 601, the first connecting rod 10 and the second connecting rod 11 move along the through groove, respectively. In an alternative embodiment, the first lever 5 and the second lever 6 are arranged alternately in the circumferential direction. Correspondingly, the first lever 5 and the second lever 6 are also arranged alternately in the circumferential direction, and a space is formed between adjacent first levers 5 and second levers 6 for the first connecting rod 10 or the second connecting rod 11 to move.

[0057] In one embodiment, the first connecting component includes an upper support member 12, which is fixedly connected to the upper side plate 1. A first lever 5 and a second lever 6 are connected to the lower side of the upper support member 12. The outer periphery of the upper support member 12 is provided with a first abutting part 1201. When the pneumatic tire tread vulcanizing mold is in the closed state, the first abutting part 1201 abuts against the inner side of the inner mold component.

[0058] In this embodiment, the upper support member 12 is fixedly connected to the upper side plate 1. The first lever 5 and the second lever 6 are connected to the lower side of the upper support member 12. When the mold is opened, the hot plate on the vulcanizing machine drives the upper side plate 1 to move upward. The upper side plate 1 drives the first lever 5 and the second lever 6 to move upward synchronously through the upper support member 12. By providing a first abutting part 1201 on the outer periphery of the upper support member 12, when the airless tire tread vulcanizing mold is in the closed state, the first abutting part 1201 abuts against the inner side of the inner mold assembly, which can improve the roundness accuracy of the inner mold assembly and position the inner mold assembly, avoid the roundness of the inner mold assembly from exceeding the tolerance, and avoid radial displacement of the inner mold assembly due to rubber expansion during the tire vulcanization process.

[0059] In a preferred embodiment, the first abutting portion 1201 is an inclined surface, and the inner surfaces of the first inner module 3 and the second inner module 4 have inclined surfaces adapted to the first abutting portion 1201.

[0060] In one embodiment, the first connecting assembly further includes a support block 13 and a lower support member 14. The upper support member 12 is connected to the lower support member 14 through the support block 13. The lower support member 14 has a second abutment portion 1401 on its outer periphery. When the pneumatic tire tread vulcanizing mold is in the closed state, the second abutment portion 1401 abuts against the inner side of the inner mold assembly. The lower support member 14 has a clearance groove arranged circumferentially. The first lever 5 and the second lever 6 are set through the clearance groove.

[0061] In this embodiment, when the pneumatic tire tread vulcanizing mold is in the closed state, the first abutment part 1201 and the second abutment part 1401 simultaneously abut against the inner side of the inner mold assembly, which can further position the inner mold assembly, improve the roundness accuracy of the inner mold assembly, and improve the tire vulcanization quality. The upper support member 12 is connected to the lower support member 14 through the support block 13. The lower support member 14 is provided with a clearance groove arranged circumferentially. The first lever 5 and the second lever 6 are set through the clearance groove, so that the upper support member 12, the support block 13, the lower support member 14 and the first lever 5 and the second lever 6 are connected as a whole, which can prevent the first lever 5 and the second lever 6 from shaking when moving up and down.

[0062] Specifically, the upper support member 12 is connected to the upper side plate 1 by screws, the upper support member 12 is connected to the support block 13 by screws, and the support block 13 is connected to the lower support member 14 by screws.

[0063] Specifically, the support block 13 is located inside the inner mold assembly.

[0064] In one embodiment, when the vulcanizing mold for the pneumatic tire tread is in the closed state, the adjacent first inner module 3 and second inner module 4 abut against each other circumferentially and radially inward, the two adjacent sides of the first inner module 3 and the second inner module 4 gradually shrink, and the two adjacent sides of the second inner module 4 and the first inner module 3 gradually expand.

[0065] In this embodiment, when the vulcanizing mold for the pneumatic tire tread is closed, adjacent first inner module 3 and second inner module 4 abut circumferentially, forming a continuous and complete rigid inner support surface on the outer side of the inner mold assembly. This ensures uniform stress on the inner surface of the tread, eliminates seam defects, and guarantees molding accuracy and flatness. Radially inward, the adjacent sides of the first inner module 3 and second inner module 4 gradually contract, while the adjacent sides of the second inner module 4 and first inner module 3 gradually expand. This facilitates the second inner module 4 sliding radially inward before the first inner module 3 during the first mold opening stage, and ensures that the second inner module 4 does not interfere with the first inner module 3 during radial inward sliding, thus improving the smoothness of the second inner module 4's movement.

[0066] like Figure 5As shown, when the vulcanizing mold for the pneumatic tire tread is in the closed state, the adjacent first inner module 3 pieces and second inner module 4 pieces abut against each other circumferentially, as... Figure 2 As shown, after the first mold-opening stage, in the radial direction, the second inner module 4 is closer to the tire axis than the first inner module 3. Since the first inner module 3 and the second inner module 4 move synchronously after the first mold-opening stage, therefore... Figure 6 As shown, after the mold is opened, the second inner module 4 is closer to the tire axis than the first inner module 3 in the radial direction.

[0067] In one embodiment, the first inner module 3 and the second inner module 4 are slidably engaged with the lower side plate 2 via guide components.

[0068] In this embodiment, the first inner module 3 and the second inner module 4 are slidably engaged with the lower side plate 2 through a guide component. The guide component can guide the movement of the first inner module 3 and the second inner module 4 to ensure smooth movement of the first inner module 3 and the second inner module 4, and to ensure smooth mold opening and closing.

[0069] In one specific embodiment, the guide assembly may include a T-block 15 and a slide rail. The T-block 15 is disposed in the first inner module 3 and the second inner module 4, and the slide rail is disposed in the lower side plate 2; or the T-block 15 is disposed in the lower side plate 2, and the slide rail is disposed in the first inner module 3 and the second inner module 4. The T-block 15 can slide along the slide rail and will not disengage from the slide rail in the vertical direction.

[0070] In an alternative embodiment, the guide assembly may include a guide rod and a guide hole, for example, one of the guide rod and the guide hole is provided in the first inner module 3 and the second inner module 4, and the other of the guide rod and the guide hole is provided in the lower side plate 2, with the guide rod extending in the radial direction.

[0071] In another alternative embodiment, the guide assembly may include a dovetail guide groove and a guide block. For example, one of the dovetail guide groove and the guide block may be provided in the first inner module 3 and the second inner module 4, and the other of the dovetail guide groove and the guide block may be provided in the lower side plate 2. The dovetail guide groove extends in the radial direction.

[0072] In one embodiment, the second connecting assembly includes a guide ring 16, a tread block guide strip 17, and a fixing hook 18. The guide ring 16 is connected to the upper side plate 1 and extends circumferentially; the tread block guide strip 17 is fixed to the inner side of the guide ring 16, and its inner surface is inclined, tilting from top to bottom away from the tire axis; the outer molded tread block 9 slides in contact with the inner surface of the tread block guide strip 17; the fixing hook 18 is fixed to the lower end of the outer molded tread block 9; the lower side plate 2 has a groove 201, and a barb 202 is provided on the side wall of the groove 201 near the tire axis; the fixing hook 18 is adapted to abut against the lower surface of the barb 202 and slide along the lower surface of the barb 202; after the fixing hook 18 disengages from the barb 202, it is adapted to leave the lower side plate 2 through the top opening of the groove 201.

[0073] In this embodiment, the tread block guide strip 17 is fixed to the inner side of the guide ring 16. The inner side of the tread block guide strip 17 is a slope and is inclined from top to bottom in a direction away from the tire axis. The outer molded tread block 9 slides with the inner side of the tread block guide strip 17. The fixing hook 18 is fixed to the lower end of the outer molded tread block 9. The lower side plate 2 is provided with a groove 201. The side wall of the groove 201 near the tire axis is provided with a barb 202. The fixing hook 18 is adapted to abut against the lower side of the barb 202 and along the barb 202. When the mold opens, the hot plate on the vulcanizing machine drives the upper side plate 1 to move upward. The upper side plate 1 drives the guide ring 16 and the tread block guide strip 17 to move upward synchronously. Since the fixed hook 18 abuts against the lower side of the barb 202 in the lower side plate 2, the outer shaped tread block 9 is constrained by the barb 202 through the fixed hook 18 and cannot move upward. Therefore, it slides down relative to the inner side of the tread block guide strip 17, realizing the outer shaped tread block 9 sliding outward radially, so that the outer shaped tread block 9 is evenly separated from the tire tread. When the outer shaped tread block 9 drives the fixed hook 18 to move until the fixed hook 18 disengages from the barb 202, the outer shaped tread block 9 is no longer constrained by the barb 202. Driven by the tread block guide strip 17, it moves upward together with the upper side plate 1, disengaging from the lower side plate 2, making it easy to remove the vulcanized tire.

[0074] In one specific embodiment, the fixing hook 18 is connected to the external shaped patterned block 9 by screws.

[0075] In one embodiment, a groove 901 is provided on the outer side of the outer molded pattern block 9, and the pattern block guide strip 17 is slidably disposed in the groove 901. A limiting member 19 is provided at the lower end of the pattern block guide strip 17. After the fixing hook 18 disengages from the barb 202, the limiting member 19 is used to restrict the outer molded pattern block 9 from sliding downward relative to the pattern block guide strip 17.

[0076] In this embodiment, by providing a groove 901 on the outer side of the outer molded pattern block 9, the pattern block guide strip 17 is slidably disposed in the groove 901, which can guide the movement direction of the outer molded pattern block 9. By providing a limiting member 19 at the lower end of the pattern block guide strip 17, when the fixing hook 18 disengages from the barb 202, the limiting member 19 restricts the outer molded pattern block 9 from sliding downward relative to the pattern block guide strip 17, which can ensure that the outer molded pattern block 9 can move upward together with the pattern block guide strip 17, the guide ring, and the upper side plate 1, thereby realizing the separation of the outer molded pattern block 9 from the lower side plate 2.

[0077] The specific mold opening process for the airless tire tread vulcanization mold provided in this embodiment is as follows: Figures 2 to 4 As shown, in the first mold opening stage, as Figure 2 As shown, the hot plate on the vulcanizing machine drives the upper side plate 1 to move upward. The upper side plate 1 drives the first lever 5 and the second lever 6 to move upward synchronously. The first lever 5 is provided with a first guide groove 501, and the second lever 6 is provided with a second guide groove 601. From top to bottom, the first guide groove 501 includes a first vertical section 5011 and a first inclined section 5012, and the second guide groove 601 includes a second inclined section 6011. During the upward movement of the first lever 5, the first mating part 7 moves along the first vertical section 5011 first. During this process, the first mating part 7 will not be displaced radially, so the first inner module 3 remains stationary. The second mating part 8 moves along the second inclined section 6011. Since the second inclined section 6011 is inclined towards the direction closer to the tire axis from top to bottom, the second mating part 8 moves radially inward. The second mating part 8 drives the second inner module 4 to slide radially inward, so that the second inner module 4 slides radially inward before the first inner module 3, leaving room for the first inner module 3 to move. Simultaneously, the upper side plate 1 drives the guide ring 16 and the tread block guide strip 17 to move upwards, and the outer molded tread block 9 slides along the tread block guide strip 17. The fixing hook 18 engages with the barb 202 in the groove 201 of the lower side plate 2, causing the outer molded tread block 9 to move radially outwards. After the first mold opening stage is completed, the fixing hook 18 disengages from the barb 202 in the groove 201 of the lower side plate 2, at which point the outer molded tread block 9 separates from the vulcanized tire.

[0078] In the second mold-making stage, such as Figure 3 As shown, the first mating part 7 enters the first inclined section 5012, while the second mating part 8 is still located in the second inclined section 6011. The first lever 5 and the second lever 6 continue to move upward under the drive of the upper side plate 1. The first mating part 7 moves along the first inclined section 5012, and the second mating part 8 moves along the second inclined section 6011, so that the first inner module 3 and the second inner module 4 slide radially inward at the same time.

[0079] In the third mold-opening stage, the first mating part 7 enters the second vertical section 5013, and the second mating part 8 enters the third vertical section 6012. The first mating part 7 and the second mating part 8 no longer move radially inward until the first mating part 7 exits the first guide groove 501 through the lower opening of the first guide groove 501, and the second mating part 8 exits the second guide groove 601 through the lower opening of the second guide groove 601. Figure 4 As shown, the mold is opened.

[0080] During the mold-making process, such as Figure 2 As shown, the upper side plate 1 drives the guide ring 16 and the patterned block guide strip 17 to move upward. The outer shaped patterned block 9 slides along the patterned block guide strip 17. The fixing hook 18 cooperates with the barb 202 in the groove 201 of the lower side plate 2, causing the outer shaped patterned block 9 to move radially outward. Figure 3 As shown, the fixing hook 18 moves until it disengages from the barb 202 in the groove 201 of the lower side plate 2, at which point the outer molded tread block 9 separates from the vulcanized tire. Then, as... Figure 4 As shown, the outer patterned block 9 moves upward together with the patterned block guide strip 17, guide ring, and upper side plate 1, thereby separating the outer patterned block 9 from the lower side plate 2.

[0081] The mold closing process can be achieved by moving in the opposite direction to the mold opening process, which will not be elaborated here.

[0082] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A vulcanizing mold for a pneumatic tire tread, characterized in that, include: The upper side plate (1) is suitable for connection with the upper hot plate of the vulcanizing machine; The lower side plate (2) is suitable for connection with the lower hot plate of the vulcanizing machine; The inner mold assembly includes a first inner module (3) and a second inner module (4) arranged alternately in the circumferential direction, wherein the first inner module (3) and the second inner module (4) are respectively slidably connected to the lower side plate (2) in the radial direction; A first connecting component is connected to the upper side plate (1). The first connecting component includes a first lever (5) corresponding to the first inner module (3) and a second lever (6) corresponding to the second inner module (4). The first lever (5) is provided with a first guide groove (501). The first inner module (3) is connected to a first mating part (7). The second lever (6) is provided with a second guide groove (601). The second inner module (4) is connected to a second mating part (8). The first mating part (7) is slidably engaged with the first guide groove (501), and the second mating part (8) is slidably engaged with the second guide groove (601). From top to bottom, the first guide groove (501) includes a first vertical section (5011). The first inclined section (5012) and the second guide groove (601) include the second inclined section (6011). From top to bottom, the first inclined section (5012) and the second inclined section (6011) are inclined toward the direction close to the tire axis, so as to realize that the mold opening includes a first mold opening stage and a second mold opening stage. In the first mold opening stage, the second inner module (4) slides radially inward before the first inner module (3). In the second mold opening stage, the first inner module (3) and the second inner module (4) slide radially inward at the same time, so that the radial stroke of the first inner module (3) is L1 and the radial stroke of the second inner module (4) is L2, L1 < L2, L2 - L1 ≥ the thickness of the first inner module (3); An externally formed patterned block (9) is connected to the upper side plate (1) and the lower side plate (2) via a second connecting assembly to enable the externally formed patterned block (9) to slide radially outward during mold opening. The second connecting assembly includes: A guide ring (16) is connected to the upper side plate (1) and extends circumferentially; The tread block guide strip (17) is fixed to the inner side of the guide ring (16). The inner side of the tread block guide strip (17) is a slope and is inclined from top to bottom in a direction away from the tire axis. The outer shaped tread block (9) slides in cooperation with the inner side of the tread block guide strip (17). The outer side of the externally shaped patterned block (9) is provided with a groove (901), the patterned block guide strip (17) is slidably disposed in the groove (901), and the lower end of the patterned block guide strip (17) is provided with a limiting member (19), the limiting member (19) is used to restrict the externally shaped patterned block (9) from sliding downward relative to the patterned block guide strip (17).

2. The vulcanizing mold for the pneumatic tire tread according to claim 1, characterized in that, The length of the first inclined segment (5012) is X1, the angle between the axis of the first inclined segment (5012) and the vertical line is θ1, L1 = X1*sinθ1, the length of the second inclined segment (6011) is X2, the angle between the axis of the second inclined segment (6011) and the vertical line is θ2, L2 = X2*sinθ2.

3. The vulcanizing mold for the pneumatic tire tread according to claim 2, characterized in that, X1 < X2, θ1 = θ2.

4. The vulcanizing mold for the pneumatic tire tread according to claim 2, characterized in that, The first guide groove (501) further includes a second vertical section (5013) disposed at the lower end of the first inclined section (5012), and the second guide groove (601) further includes a third vertical section (6012) disposed at the lower end of the second inclined section (6011). The second vertical section (5013) and the third vertical section (6012) are of equal length and both have a lower end opening. The first mating member (7) is adapted to leave the first guide groove (501) through the lower end opening, and the second mating member (8) is adapted to leave the second guide groove (601) through the lower end opening.

5. The vulcanizing mold for pneumatic tire treads according to any one of claims 1 to 4, characterized in that, Both the first mating part (7) and the second mating part (8) are bearings.

6. The vulcanizing mold for pneumatic tire treads according to any one of claims 1 to 4, characterized in that, The first connecting component includes an upper support member (12), which is fixedly connected to the upper side plate (1). The first lever (5) and the second lever (6) are connected to the lower side of the upper support member (12). The outer periphery of the upper support member (12) is provided with a first abutting part (1201). When the airless tire tread vulcanizing mold is in the closed state, the first abutting part (1201) abuts against the inner side of the inner mold component.

7. The vulcanizing mold for pneumatic tire treads according to claim 6, characterized in that, The first connecting component further includes a support block (13) and a lower support member (14). The upper support member (12) is connected to the lower support member (14) through the support block (13). The lower support member (14) has a second abutment part (1401) on its outer periphery. When the airless tire tread vulcanizing mold is in the closed state, the second abutment part (1401) abuts against the inner side of the inner mold component. The lower support member (14) has a clearance groove arranged in the circumferential direction. The first lever (5) and the second lever (6) are arranged through the clearance groove.

8. The vulcanizing mold for pneumatic tire treads according to any one of claims 2 to 4, characterized in that, When the airless tire tread vulcanizing mold is in the closed state, the adjacent first inner module (3) and second inner module (4) abut against each other in the circumferential direction and in the radial direction. The two adjacent sides of the first inner module (3) and the second inner module (4) gradually shrink, and the two adjacent sides of the second inner module (4) and the first inner module (3) gradually expand.

9. The vulcanizing mold for pneumatic tire treads according to any one of claims 1 to 4, characterized in that, The first inner module (3) and the second inner module (4) are slidably engaged with the lower side plate (2) through guide components.

10. The vulcanizing mold for pneumatic tire treads according to any one of claims 1 to 4, characterized in that, The second connection component also includes: A fixing hook (18) is fixed to the lower end of the external shaped pattern block (9). The lower side plate (2) is provided with a groove (201). The side wall of the groove (201) near the tire axis is provided with a barb (202). The fixing hook (18) is adapted to abut against the lower side of the barb (202) and slide along the lower side of the barb (202). After the fixing hook (18) is disengaged from the barb (202), it is adapted to leave the lower side plate (2) through the top opening of the groove (201). After the fixing hook (18) is disengaged from the barb (202), the limiting member (19) is used to restrict the external shaped pattern block (9) from sliding downward relative to the pattern block guide strip (17).

Images