Tire mold with detachable pattern modules
The design of detachable tread pattern modules solves the problem of high cost of changing tread patterns in traditional tire molds, and enables convenient installation and replacement of tread pattern modules, thereby improving production flexibility and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO WEIDONG PRECISION MOULD CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional tire mold tread patterns are designed as a single, fixed structure, which results in high costs for changing patterns, insufficient production flexibility, and an inability to efficiently produce tires of the same specification but with different tread patterns.
The design features detachable pattern modules, which can be easily installed and replaced through the cooperation of sliding buckles and return springs. Combined with a modular splicing structure and multiple connection mechanisms, the stability and precision of the mold are ensured.
It enables rapid replacement of tread pattern modules, reduces the cost of producing tires of the same specification but different tread patterns, and improves production flexibility and mold utilization efficiency.
Smart Images
Figure CN224210316U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tire mold technology, and in particular to a tire mold with a detachable tread module. Background Technology
[0002] Tire molds are the core equipment for tire vulcanization molding, and their design precision and structural flexibility directly determine tire production efficiency and product diversity. In the tire manufacturing industry, multiple tread patterns are often developed for tires of the same specification to meet market demands (such as the tread pattern differences between road tires and off-road tires). However, the tread structure of traditional tire molds usually adopts an integral fixed design, that is, the tread blocks are permanently connected to the mold body by welding, bolting, or other methods.
[0003] The main drawbacks of the existing technology are as follows: the cost of changing the tread pattern is high, and when it is necessary to produce tires of the same specification but different tread patterns, the entire set of molds must be reprocessed, resulting in insufficient production flexibility. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tire mold with a detachable tread pattern module.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tire mold with detachable tread modules, comprising an upper mold assembly and a lower mold assembly arranged in an upper and lower configuration, wherein a plurality of tread modules are detachably connected to the mating surfaces of the upper mold assembly and the lower mold assembly.
[0006] An installation mechanism for positioning and installing the pattern module is provided between the upper mold assembly and the lower mold assembly. The installation mechanism includes several sliding grooves distributed along the circumference of the mold. The sliding grooves are respectively opened through the mating surfaces of the upper mold assembly and the lower mold assembly, and a snap-fit block is slidably fitted in each sliding groove. A snap-fit groove adapted to the snap-fit block is opened on the back of the pattern module.
[0007] The effect achieved by the above components is as follows: the sliding buckle block allows the buckle block to be inserted into the snap-fit groove, so that the tread pattern module can be installed in the upper mold assembly or the lower mold assembly. Conversely, the tread pattern module can be replaced. This avoids the situation where the tread pattern module on the current tire mold is usually fixedly connected to the mold. When the tire factory wants to produce tires of the same specification but different tread patterns, it needs to reprocess the mold, which increases the production cost.
[0008] Preferably, a cylindrical rod that penetrates the lower mold assembly is fixedly connected to the side of the buckle block facing away from the snap-fit groove, and the cylindrical rod slides with the lower mold assembly to form a guide structure.
[0009] The effect achieved by the above components is that the operator can slide the buckle block by sliding the cylindrical rod, making the operation more convenient.
[0010] Preferably, a return spring is sleeved on the cylindrical rod, with both ends of the return spring abutting against the snap-fit block and the inner wall of the sliding groove, respectively, to provide a return spring force for the snap-fit block to engage with the snap-fit groove.
[0011] The effect achieved by the above components is as follows: when the pattern module is inserted into the upper mold assembly or the lower mold assembly, the pattern module will push the inclined surface of the snap-fit block, so that the snap-fit block is snapped into the sliding groove. At this time, the return spring is in a contracted state. When the snap-fit block contacts the snap-fit groove, the snap-fit block is snapped into the snap-fit groove under the action of the return spring's rebound force, making the operation more convenient.
[0012] Preferably, adjacent pattern modules are connected by a detachable snap-fit structure. One end of each pattern module has a connecting protrusion, and the other end has a connecting groove that matches the connecting protrusion. The connecting protrusion and the connecting groove form a modular splicing structure.
[0013] The effect achieved by the above components is that when installing pattern modules, the connecting protrusion on one pattern module can be inserted into the connecting groove on the adjacent pattern module to connect several pattern modules together, and it is also convenient to replace a single damaged pattern module.
[0014] Preferably, an arc-shaped mating structure is provided between the lower mold assembly and the upper mold assembly as a connecting mechanism. The connecting mechanism includes an arc-shaped groove formed on the mating surface of the lower mold assembly and an arc-shaped block fixedly connected to the mating surface of the upper mold assembly. The arc-shaped block and the arc-shaped groove form a circumferential positioning and guiding fit.
[0015] The effect achieved by the above components is that the arc-shaped locking block can be inserted into the arc-shaped locking slot, thus connecting the upper mold assembly and the lower mold assembly together.
[0016] Preferably, on the mating surface of the lower mold assembly, rubber sealing blocks are fixedly connected to both sides of the arc-shaped groove, and the rubber sealing blocks are used to fill the gap between the upper mold assembly and the lower mold assembly.
[0017] The effect achieved by the above components is that the two rubber sealing blocks can improve the sealing of the connection and prevent leakage.
[0018] Preferably, the lower mold assembly has two first positioning blocks fixedly connected to its edge, and the upper mold assembly has two second positioning blocks fixedly connected to its corresponding positions. The second positioning blocks have positioning grooves that are adapted to the first positioning blocks, forming a secondary positioning structure when they are engaged.
[0019] The effect achieved by the above components is that by inserting the first positioning block into the corresponding positioning groove, the connection between the upper mold assembly and the lower mold assembly can be made more stable.
[0020] Preferably, a fastening bolt is threaded through the second positioning block, and a threaded hole adapted to the fastening bolt is opened on the first positioning block. The fastening bolt and the threaded hole lock the upper mold assembly and the lower mold assembly through threaded engagement.
[0021] The effect achieved by the above components is that rotating the fastening bolt causes the fastening bolt to be threadedly connected to the threaded hole, which can further improve the stability of the connection.
[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this utility model, by setting an installation mechanism, the sliding buckle block is made to engage with the snap-fit groove, so that the pattern module can be installed in the upper mold assembly or the lower mold assembly. Conversely, the pattern module can be replaced. The operator can slide the buckle block by sliding the cylindrical rod, making the operation more convenient. When the pattern module is inserted into the upper mold assembly or the lower mold assembly, the pattern module will push the inclined surface of the buckle block, so that the buckle block engages with the sliding groove. At this time, the return spring is in the contracted state, and the buckle block engages with the snap-fit groove. When the grooves make contact, the snap-fit block is engaged in the snap-fit groove under the return spring force, making the operation more convenient. When installing the tread pattern module, the connecting protrusion on one tread pattern module is snapped into the connecting groove on the adjacent tread pattern module to connect several tread pattern modules together. It also makes it easy to replace a single damaged tread pattern module. This avoids the situation where the tread pattern modules on the current tire molds are usually fixedly connected to the mold. When the tire factory wants to produce tires of the same specification but different tread patterns, it needs to reprocess the mold, which increases the production cost. Attached Figure Description
[0023] Figure 1 A three-dimensional structural diagram of a tire mold with a detachable tread module is provided for this utility model.
[0024] Figure 2 This utility model provides a partial schematic diagram of the installation mechanism for a tire mold with a detachable tread pattern module.
[0025] Figure 3 Another schematic diagram of the mounting mechanism for a tire mold with a detachable tread pattern module is provided for this utility model.
[0026] Figure 4 This utility model presents a partial schematic diagram of the connection mechanism of a tire mold with a detachable tread module.
[0027] Legend: 1. Upper mold assembly; 2. Lower mold assembly; 3. Pattern module; 4. Mounting mechanism; 41. Sliding groove; 42. Snap-fit block; 43. Cylindrical rod; 44. Return spring; 45. Snap-fit groove; 46. Connecting protrusion; 47. Connecting groove; 5. Connecting mechanism; 51. Arc-shaped slot; 52. Arc-shaped snap-fit block; 53. Rubber sealing block; 54. First positioning block; 55. Second positioning block; 56. Positioning groove; 57. Fastening bolt; 58. Threaded hole. Detailed Implementation
[0028] This utility model discloses a customizable tread pattern tire mold, which adopts a split mating structure, including an upper mold assembly 1 and a lower mold assembly 2. The two are guided and positioned vertically by bottom guide pillars (not shown in the figure). The bottom surface of the upper mold assembly 1 and the top surface of the lower mold assembly 2 are mating working surfaces, and each has a rectangular mounting area for mounting the tread pattern module 3. This area is distributed in a ring along the circumference of the mold to adapt to the circumferential structure of the tire tread.
[0029] The sliding groove 41 is a T-shaped cross-section groove, including a horizontal guide section and a vertical limiting section opened on the mating working surface, to ensure that the buckle block 42 can only slide in the horizontal direction and avoid falling off.
[0030] The number of sliding grooves 41 corresponds one-to-one with the number of pattern modules 3, and they are evenly distributed along the edge of the installation area. The center-to-center distance between adjacent sliding grooves 41 is 50-100mm, which is adjusted according to the mold specifications.
[0031] The angle of the buckle block 42 toward the pattern module 3 is 45°. This angle design generates a horizontal component force when the pattern module 3 is pushed in, which automatically compresses the reset spring 44. A limiting flange is provided at the end of the inclined surface to prevent the buckle block 42 from sliding completely into the sliding groove 41.
[0032] The cylindrical rod 43 is fitted with a copper bushing through the lower mold assembly 2 to reduce sliding friction. The gap between the outer diameter of the bushing and the through hole of the lower mold assembly 2 is 0.05-0.1mm to ensure smooth sliding and accurate positioning.
[0033] The reset spring 44 is a stainless steel compression spring with a free length of 20-30mm, a spring constant of 5-10N / mm, and a pre-compression of 5mm, ensuring that the locking force when the buckle block 42 is engaged in the buckle groove 45 is not less than 50N.
[0034] The connecting protrusion 46 is a trapezoidal cross-section protrusion with an upper base width of 8mm, a lower base width of 12mm, and a height of 5mm; the connecting groove 47 is a corresponding trapezoidal groove with a groove depth of 5.5mm, ensuring that a 0.5mm interference fit is formed after the protrusion is inserted, preventing module misalignment during vulcanization.
[0035] The contact surfaces of the connecting protrusion 46 and the connecting groove 47 are provided with anti-slip textures such as grid knurling, and the surface roughness Ra≤1.6μm to enhance the friction between the modules.
[0036] Quick replacement process for pattern module 3:
[0037] Disassembly steps: The operator pulls the ring handle at the end of the cylindrical rod 43 outward with a wrench to overcome the elastic force of the return spring 44 and make the buckle block 42 completely retract into the sliding groove 41. Then, the old pattern module 3 is pulled out upward in a direction perpendicular to the mating surface.
[0038] Installation steps: Align the connecting protrusion 46 of the new pattern module 3 with the connecting groove 47 of the adjacent module, pre-insert it at a 30° angle, and then push it horizontally until the mating working surfaces are in contact. At this time, the inclined surface on the back of the pattern module 3 pushes the buckle block 42 to compress the spring until the snap groove 45 is aligned with the buckle block 42. The spring rebounds and locks in place, accompanied by a "click" sound as a sign that the installation is in place.
[0039] The arc-shaped groove 51 is a semi-circular annular groove with a radius of 50mm and a central angle of 180°; the arc-shaped block 52 is a corresponding semi-cylinder with a height of 10mm. The gap between the two is ≤0.03mm, forming a precision positioning pair to ensure that the circumferential error is ≤0.1mm when the upper and lower mold components are aligned.
[0040] The rubber sealing block 53 is made of silicone rubber with a Shore hardness of 60±5A. It has a rectangular cross-section with a width of 15mm and a height of 8mm. It is distributed in a ring along both sides of the arc-shaped groove 51 to form a double sealing band. When the mold is closed, the sealing block is deformed by 30% under pressure, filling the gap and generating a contact stress of 0.2-0.3MPa, which effectively prevents the leakage of high-temperature rubber material during vulcanization.
[0041] Both the first positioning block 54 and the second positioning block 55 are rectangular block structures. The top of the first positioning block 54 is provided with a limiting inclined surface with an angle of 30°, which facilitates quick insertion into the positioning groove 56. The bottom of the positioning groove 56 is provided with a buffer rubber pad to absorb the impact force when the bolt is tightened.
[0042] Fastening bolt 57 is an M12 high-strength bolt with a performance grade of 10.9. The thread hole 58 has a depth of 25mm. After the bolt is screwed in, the exposed length is 10-15mm. The tightening torque is controlled by a torque wrench to 80-100N·m to ensure the connection stiffness is ≥50kN / mm.
[0043] Pattern module 3 is made of H13 hot work die steel, with a nitrided surface and a hardness of 52-55HRC. The wear-resistant layer is 0.3-0.5mm thick and it is suitable for vulcanization temperatures of 150-200℃ and pressures of 10-15MPa.
[0044] The buckle block 42 and the cylindrical rod 43 are made of 42CrMo alloy structural steel, with a hardness of 35-38HRC after quenching and tempering, and a hard chrome plating thickness of 0.02-0.03mm to improve corrosion resistance.
[0045] The sliding groove 41 and the snap-fit groove 45 are machined by slow wire cutting with a dimensional accuracy of ±0.005mm and a surface roughness Ra≤0.8μm, ensuring that the snap-fit block 42 slides smoothly and locks tightly.
[0046] The arc-shaped slot 51 and the arc-shaped block 52 are milled by a five-axis linkage machining center, and the form and position tolerance of the mating surface is ≤0.02mm, ensuring the dynamic fit accuracy when mating.
[0047] The working principle is as follows: by sliding the latching block 42 into the latching groove 45, the tread pattern module 3 can be installed onto the upper mold assembly 1 or the lower mold assembly 2; by sliding the latching block 42 in the opposite direction to disengage it from the latching groove 45, the tread pattern module 3 can be quickly replaced. This structure avoids the defect of traditional mold tread pattern modules being fixed and non-removable. When it is necessary to produce tires of the same specification but different tread patterns, there is no need to reprocess the entire mold, significantly reducing production costs.
[0048] The operator can slide the cylindrical rod 43 through the lower mold assembly 2 to move the latching block 42 horizontally, achieving one-handed operation. During the specific installation process, when the pattern module 3 is aligned with the installation position and pushed in, its back slope will push the latching block 42 into the sliding groove 41, compressing the return spring 44; when the pattern module 3 is in place, the locking groove 45 is aligned with the latching block 42, and the return spring 44 rebounds to drive the latching block 42 to automatically engage with the locking groove 45, completing the locking and achieving the convenient operation of "push-in and positioning".
[0049] Pattern module 3 adopts a modular splicing design. The connecting protrusion 46 at one end of a single module can precisely engage with the connecting groove 47 of the adjacent module, forming a tight splice. This structure not only facilitates the rapid assembly of multiple modules into a complete pattern ring, but also allows for the individual disassembly and replacement of damaged single modules, reducing maintenance costs by more than 70%.
[0050] The connection between the upper mold assembly 1 and the lower mold assembly 2 is achieved through multiple structures: First, the arc-shaped locking block 52 of the upper mold assembly 1 is embedded into the arc-shaped locking groove 51 of the lower mold assembly 2 to form a circumferential positioning guide; second, the rubber sealing blocks 53 located on both sides of the arc-shaped locking groove 51 are deformed under pressure to fill the mold gap and form a contact stress of more than 0.2MPa, which effectively prevents the leakage of rubber material during vulcanization; finally, the first positioning block 54 of the lower mold assembly 2 is inserted into the positioning groove 56 of the upper mold assembly 1 to achieve secondary positioning, and is locked by tightening the fastening bolt 57 into the threaded hole 58. The torque is controlled at 80-100N·m to ensure that the overall deformation after the mold is closed is ≤0.03mm, which meets the requirements of high-precision vulcanization.
[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.
Claims
1. A tire mold with a detachable tread pattern module, comprising an upper mold assembly (1) and a lower mold assembly (2) arranged vertically opposite each other, characterized in that: Several patterned modules (3) can be detachably connected to the mating surfaces of the upper mold assembly (1) and the lower mold assembly (2); An installation mechanism (4) for positioning and installing the pattern module (3) is provided between the upper mold assembly (1) and the lower mold assembly (2). The installation mechanism (4) includes a plurality of sliding grooves (41) distributed along the circumference of the mold. The sliding grooves (41) are respectively opened through the mating surfaces of the upper mold assembly (1) and the lower mold assembly (2), and each sliding groove (41) is slidably fitted with a snap-fit block (42). The back of the pattern module (3) is provided with a snap-fit groove (45) adapted to the snap-fit block (42).
2. The tire mold with detachable tread pattern module according to claim 1, characterized in that: The buckle block (42) is fixedly connected to a cylindrical rod (43) that passes through the lower mold assembly (2) on the side opposite to the snap-fit groove (45). The cylindrical rod (43) and the lower mold assembly (2) slide together to form a guide structure.
3. The tire mold with detachable tread pattern module according to claim 2, characterized in that: A reset spring (44) is sleeved on the cylindrical rod (43). The two ends of the reset spring (44) abut against the inner wall of the snap block (42) and the sliding groove (41) respectively, and are used to provide the reset spring force for the snap block (42) to snap into the snap groove (45).
4. The tire mold with detachable tread pattern module according to claim 1, characterized in that: The adjacent pattern modules (3) are connected by a detachable snap-fit structure. One end of the pattern module (3) is provided with a connecting protrusion (46), and the other end is provided with a connecting groove (47) that matches the connecting protrusion (46). The connecting protrusion (46) and the connecting groove (47) form a modular splicing structure.
5. The tire mold with detachable tread pattern module according to claim 1, characterized in that: An arc-shaped mating structure is provided between the lower mold assembly (2) and the upper mold assembly (1) as a connecting mechanism (5). The connecting mechanism (5) includes an arc-shaped slot (51) opened on the mating surface of the lower mold assembly (2) and an arc-shaped block (52) fixedly connected to the mating surface of the upper mold assembly (1). The arc-shaped block (52) and the arc-shaped slot (51) form a circumferential positioning and guiding fit.
6. The tire mold with detachable tread module according to claim 5, characterized in that: On the mating surface of the lower mold assembly (2), rubber sealing blocks (53) are fixedly connected to both sides of the arc-shaped groove (51). The rubber sealing blocks (53) are used to fill the gap between the upper mold assembly (1) and the lower mold assembly (2).
7. The tire mold with detachable tread pattern module according to claim 5, characterized in that: The lower mold assembly (2) has two first positioning blocks (54) fixedly connected to its edge, and the upper mold assembly (1) has two second positioning blocks (55) fixedly connected to its corresponding position. The second positioning blocks (55) have positioning grooves (56) that are adapted to the first positioning blocks (54) to form a secondary positioning structure when they are engaged.
8. The tire mold with detachable tread pattern module according to claim 7, characterized in that: The second positioning block (55) is threaded with a fastening bolt (57), and the first positioning block (54) is provided with a threaded hole (58) that is compatible with the fastening bolt (57). The fastening bolt (57) and the threaded hole (58) lock the upper mold assembly (1) and the lower mold assembly (2) through threaded engagement.