Tire mold

Abstract

The utility model discloses a tire mold which comprises a tread mold part which is divided into a plurality of mold sections in the circumferential direction of a tire, and each mold section comprises a plurality of blades which are used for molding transversely extending pattern slits on the surface of the tire tread; the blade is fixedly connected to the tread mold part; a blade mounting groove and a plurality of pin holes are formed in the tread mold part, the pin holes obliquely penetrate into the tread mold part, and the end parts of the pin holes continuously penetrate into the tread mold part by a set length after penetrating through the blade mounting groove; through holes in one-to-one correspondence with the pin holes are formed in the blade; the blade is embedded into the blade mounting groove, and a plurality of pin shafts respectively penetrate through the pin holes and the through holes to limit the blade; the hinge pins are tightly matched with the pin holes, the multiple hinge pins are sequentially inserted into the pin holes and the through holes, so that the blades are limited in the blade mounting grooves, and the problems that due to the fact that a large number of defects occur in tire production, and cost and time are wasted are solved.

Description

Technical Field

[0001] This utility model belongs to the field of tire manufacturing technology, specifically relating to a tire mold. Background Technology

[0002] Currently, tire molds on the market are constantly evolving to meet changing demands, with higher requirements for strength and performance. While commonly used high-performance materials like stainless steel are produced through stamping, they are no longer sufficient. The market needs materials with even higher performance and strength. The emergence and rapid adoption of 3D printing technology has broadened the range of materials available. As printing technology improves, the use of printing blades in mold making is increasing. Simultaneously, with rising market demands for quality, the production of engraved molds is increasing annually, and the types of printing blades used in engraving molds are rapidly expanding. In the tire mold assembly process, the blades need to be assembled with the tread mold section; current assembly defects and shortcomings in the blade and tread mold section include:

[0003] 1. Due to the extremely high strength of the printed material, it is difficult to fix the blade to the tread mold.

[0004] 2. After the blades are fixed to the tread mold using LOCTITE (glue), blades may fall off during the tire production process.

[0005] 3. Using laser welding technology to weld the blade locally increases the manufacturing difficulty, and the blade may still detach during tire production.

[0006] 4. Although adjusting the tolerance of the printed steel sheet and assembling it with a tight fit can increase the strength of the implantation, the problem of falling off continues to occur after repeated thermal expansion and contraction.

[0007] If a tire comes off, it will result in a large number of defects in tire production, leading to wasted costs and time.

[0008] In addition, due to the extremely high strength of the printing material, surface treatment improvement is difficult after printing. Summary of the Invention

[0009] The purpose of this utility model is to provide a tire mold that solves the problem of assembling the blades of the tire mold with the tire mold part, and ensures that the assembly is stable and reliable during the production process and is not prone to falling off.

[0010] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:

[0011] A tire mold includes a tread mold section divided into multiple mold segments in the circumferential direction of a tire. Each mold segment includes multiple blades for molding laterally extending tread patterns on the tire tread surface. The blades are fixedly connected to the tread mold section. The tread mold section has blade mounting grooves and multiple pin holes. The pin holes are obliquely inserted into the tread mold section, and their ends pass through the blade mounting grooves and continue to penetrate into the tread mold section for a set length. The blades have through holes that correspond one-to-one with the pin holes. The blades are embedded in the blade mounting grooves, and multiple pins pass through the pin holes and the through holes respectively to limit the blades. The pins are tightly fitted with the pin holes.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the pin holes are staggered on both sides of the blade mounting groove.

[0013] Based on the above scheme and as a preferred embodiment of the above scheme: the angle between the axis of the pin hole and the blade mounting groove is 30-45°.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme: the angle between the axis of the pin hole and the blade mounting groove is 45°.

[0015] Based on the above scheme and as a preferred embodiment of the above scheme: the blade is 3D printed in one piece.

[0016] Based on the above scheme and as a preferred embodiment of the above scheme: the upper edge of the pin shaft does not extend above the upper edge of the pin hole.

[0017] Based on the above scheme and as a preferred embodiment of the above scheme: the outermost end of the pin is welded to the upper edge of the pin hole.

[0018] The outstanding and beneficial technical effect of this utility model compared with the prior art is that by inserting multiple pins into the pin holes and through holes in sequence, the blade is restricted in the blade mounting groove. Compared with glue connection, welding assembly and tight fit assembly, it can more reliably restrict the blade in the blade mounting groove, thereby preventing the blade from falling off during use. This solves the problem of a large number of defects, cost and time waste caused by these methods in tire production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a sectional view of the internal assembly structure;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the blade;

[0022] Figure 4 This is the front view of the blade structure;

[0023] Figure 5 yes Figure 4 Schematic diagram of the structure at point AA;

[0024] Figure 6 yes Figure 4 Schematic diagram of the structure at point BB;

[0025] Figure 7 This is a schematic diagram showing the fit between the upper edge of the pin and the surface of the tread mold section.

[0026] Figure 8 This is a schematic diagram of the assembly structure of the pin shaft and the tread mold part in Embodiment 2. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the given embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be understood that the terms "upper" and "lower" 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 this application and 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 this application.

[0029] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0030] See details Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 7As shown, this application discloses a tire mold, including a tread mold section 10 divided into multiple mold segments in the circumferential direction of the tire. Each mold segment includes multiple blades 20 for molding laterally extending tread patterns on the tire tread surface. The blades 20 are fixedly connected to the tread mold section 10. The tread mold section 10 has blade mounting grooves 11 and multiple pin holes 12. The pin holes 12 are obliquely inserted into the tread mold section 10, and their ends pass through the blade mounting grooves 11 and continue to penetrate into the tread mold section 10 for a set length. The blades 20 have through holes 21 that correspond one-to-one with the pin holes 12. The blades 20 are embedded in the blade mounting grooves 11, and multiple pins 30 pass through the pin holes 12 and through holes 21 respectively to limit the blades 20. The pins 30 are tightly fitted with the pin holes 12. Thus, after the blades 20 are embedded into the blade mounting grooves 11, the blades 20 are confined within the blade mounting grooves 11 by sequentially inserting the multiple pins 30 into the pin holes 12 and through holes 21. The pin 30 is tightly fitted into the pin hole 12. During installation, the pin 30 needs to be pressed into the pin hole 12, making it difficult for the pin 30 to come out of the pin hole 12. See also... Figure 7 As shown, to avoid the pin 30 being exposed on the tread mold part 10 and affecting tire forming, in this embodiment, the upper edge 30a of the pin 30 does not protrude above the upper edge 12a of the pin hole 12. After the pin 30 is installed in place, the upper edge 30a of the pin 30 can be ground to make it flush with the upper edge 12a of the pin hole 12, thereby solving the problem of affecting tire forming. Of course, since the mold will be frequently heated and cooled during the production process, the stress change may cause the pin 30 to loosen from the pin hole. In order to further prevent the possible loosening of the pin 30, in this embodiment, it is preferable to weld the upper edge 30a of the pin 30 to the upper edge 12a of the pin hole 12. The welding method includes spot welding, and after welding, the weld is ground and polished to obtain a complete forming surface. This can further improve the connection reliability between the blade 20 and the tread mold part 10.

[0031] Of course, considering the need to facilitate the installation of the pin 30 and the machining of the pin hole 12, in this embodiment, the angle between the axis of the pin hole and the blade mounting groove is preferably 30-45°; specifically, the angle between the axis of the pin hole and the blade mounting groove is preferably 45°. The blade mounting groove is obtained by machining on the tread mold part 10 using a carving mold, and the pin hole is obtained by drilling.

[0032] The blade is 3D printed in one piece, and the through hole is formed at the same time as printing. Therefore, there is no need for subsequent machining, such as drilling, to make the through hole, or only a small amount of machining is needed to obtain the through hole. For example, the through hole 21 of the printed blade 20 may have burrs or the hole diameter may not meet the preset requirements due to the shrinkage of the printing material. Only drilling is needed to remove the burrs and obtain the appropriate hole diameter. Example

[0033] See details Figure 4 , Figure 6 and Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that the pin holes 12 are preferably staggered on both sides of the blade mounting groove. This means that the pins 30 are inserted into the pin holes 12 staggered from both sides of the blade. Preferably, the angle between the axis of each pin hole and the blade mounting groove is 30-45°; specifically, a 45° angle is preferred. Furthermore, after the pins 30 are sequentially inserted into the staggered pin holes 12 on both sides of the blade mounting groove, compared to a connection structure where pins 30 are all located on the same side, this staggered pin installation structure can better adapt to forces from multiple directions (including strain changes during the vulcanization process, heating, and cooling of the tire mold). This allows for more reliable containment of the blade 20 within the blade mounting groove 21, preventing the blade from falling off during use and solving the problems of numerous defects, cost, and time waste in tire production.

[0034] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A tire mold, comprising a tread mold portion divided into multiple mold segments in the circumferential direction of the tire, each mold segment comprising a plurality of blades for molding laterally extending tread grooves on the surface of the tire tread; characterized in that: The blade is fixedly connected to the tread mold part; the tread mold part has a blade mounting groove and multiple pin holes, the pin holes are inclined and enter the tread mold part, and the ends of the pin holes pass through the blade mounting groove and continue to enter the tread mold part for a set length; the blade has through holes that correspond one-to-one with the pin holes; the blade is embedded in the blade mounting groove, and multiple pins pass through the pin holes and the through holes respectively to limit the blade; the pins are tightly fitted with the pin holes.

2. The tire mold according to claim 1, characterized in that: The pin holes are staggered on both sides of the blade mounting slot.

3. A tire mold according to claim 1, characterized in that: The angle between the axis of the pin hole and the blade mounting groove is 30-45°.

4. A tire mold according to claim 1, characterized in that: The axis of the pin hole forms a 45° angle with the blade mounting groove.

5. A tire mold according to claim 1, characterized in that: The blade is 3D printed in one piece.

6. A tire mold according to claim 1, characterized in that: The upper edge of the pin does not extend above the upper edge of the pin hole.

7. A tire mold according to claim 6, characterized in that: The outermost end of the pin is welded to the upper edge of the pin hole.

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