Exhaust insert structure of tire mold

Abstract

The utility model relates to the technical field of tire mold manufacturing, in particular to a tire mold exhaust insert structure which comprises a base embedded in a tire mold and an exhaust block used for exhausting, a hollow exhaust channel is formed in the base, and the exhaust block is arranged in the exhaust channel of the base. A plurality of exhaust micro holes communicated with the exhaust channel are uniformly formed in the exhaust block, the exhaust block is located on one side of the base, the exhaust block is in abutting fit with the tire mold, and the exhaust block is arranged in the base, so that gas can enter the exhaust channel through the exhaust micro holes in the exhaust block, and the exhaust function is achieved; meanwhile, the exhaust block is matched with the product in an abutting mode, the exhaust micropores effectively prevent rubber materials from entering the exhaust channel while exhausting air, the function of exhausting air without rubber feeding is achieved, the problem of tire burrs caused by overflowing of the rubber materials is avoided, the appearance and dynamic balance of tires are guaranteed, and compared with a traditional exhaust structure, the quality of finished tire products is improved.

Description

Technical Field

[0001] This application relates to the field of tire mold manufacturing technology, and in particular to a tire mold exhaust insert structure. Background Technology

[0002] In the tire manufacturing process, tire molds are key equipment, and their venting methods directly affect the efficiency of gas removal during vulcanization, thus playing a decisive role in the quality of the finished tire. Currently, traditional venting methods mainly include venting groove structures, venting hole structures, parting surface venting, porous material venting, and insert-type venting structures, all of which can achieve basic venting functions.

[0003] However, with the continuous advancement of tire manufacturing technology, the market has placed higher demands on tire appearance and performance. The limitations of traditional exhaust structures are becoming increasingly apparent. In the manufacturing scenarios of tires with complex tread patterns, the exhaust structure is prone to rubber overflow, which can lead to tire hair problems, affecting tire appearance and dynamic balance, and thus requires improvement. Utility Model Content

[0004] In order to achieve the function of the venting structure that only vents and does not allow glue to enter, this application provides a tire mold venting insert structure.

[0005] This application provides a tire mold exhaust insert structure, which adopts the following technical solution:

[0006] A tire mold venting insert structure includes a base embedded in the tire mold and a venting block for venting. The base has a hollow venting channel inside, and the venting block is disposed in the venting channel of the base. The venting block has a plurality of venting microholes uniformly disposed on it and communicating with the venting channel. The venting block is located on one side of the base and abuts against the tire mold.

[0007] By adopting the above technical solution, the venting block is set inside the base, allowing gas to enter the venting channel through the venting micropores on the venting block, thus realizing the venting function. At the same time, by utilizing the abutting fit between the venting block and the product, the venting micropores effectively prevent rubber from entering the venting channel while venting, achieving the function of venting only and not allowing rubber to enter, thereby avoiding rubber overflow that could cause tire hair problems, ensuring the tire's appearance and dynamic balance. Compared with traditional venting structures, this improves the quality of the finished tire.

[0008] Preferably, the exhaust block is integrally formed inside the base by additive manufacturing.

[0009] By adopting the above technical solution, the one-piece molding method can ensure the tightness and stability of the connection between the base and the exhaust block, and reduce the risk of gas leakage or adhesive seepage caused by connection gaps.

[0010] Preferably, the base and the exhaust block are connected and fixed by means of thermal expansion and contraction.

[0011] By adopting the above technical solution, the thermal expansion and contraction connection method can form an interference fit between the base and the exhaust block, making the connection firm and reliable, avoiding gas leakage and adhesive ingress, and ensuring the exhaust effect.

[0012] Preferably, the exhaust block is made of martensitic stainless steel.

[0013] By adopting the above technical solution, the diameter of the exhaust micropores is set at 0.01-0.4mm and the hole spacing is set at 0.08-15mm. This ensures that the exhaust micropores are evenly distributed and have a reasonable diameter, allowing the gas to be discharged evenly and smoothly, improving the exhaust efficiency. At the same time, it can prevent the adhesive from entering the exhaust channel through the exhaust micropores, ensuring the function of only venting and not allowing adhesive to enter.

[0014] Preferably, the diameter of any one of the exhaust micropores is in the range of 0.01-0.4 mm, and the distance between adjacent exhaust micropores is in the range of 0.08-1.5 mm.

[0015] By adopting the above technical solutions, martensitic stainless steel has the characteristics of high strength, high hardness, wear resistance and good corrosion resistance. Using this material to make exhaust blocks can improve the service life of the exhaust blocks.

[0016] Preferably, the base includes an integrally formed exhaust section and a guide section, the exhaust block is disposed inside the exhaust section, and the cross-sectional area of ​​the exhaust section is larger than the cross-sectional area of ​​the guide section.

[0017] By adopting the above technical solution, the cross-sectional area of ​​the exhaust section is larger than that of the guide section, which is conducive to the flow and guidance of gas, making it easier for gas to quickly enter the exhaust section and be discharged from the guide section, thereby improving exhaust efficiency.

[0018] Preferably, a gap step is provided at the connection between the exhaust section and the guide section to improve exhaust efficiency.

[0019] By adopting the above technical solution and utilizing the gap step, the resistance to gas flow inside the base can be reduced, allowing the gas to flow more smoothly from the exhaust section to the guide section, thereby improving exhaust efficiency.

[0020] Preferably, the cross-sectional shape of the base can be set as circular, rectangular, triangular or irregular shape.

[0021] By adopting the above technical solution, the cross-sectional shape of the base can be set to a circle, rectangle, triangle or irregular shape, so that the base shape can be flexibly selected to match the structure and design requirements of different tire molds.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By using vent blocks inside the base, gas can enter the venting channel through the venting micropores on the vent blocks, thus achieving the venting function. At the same time, by using the vent blocks to abut against the product, the venting micropores effectively prevent rubber from entering the venting channel while venting, achieving the function of venting only and not allowing rubber to enter. This avoids rubber overflow that could cause tire hair problems, ensuring the tire's appearance and dynamic balance. Compared with traditional venting structures, this improves the quality of the finished tire.

[0024] 2. Setting the diameter of the venting micropores to 0.01-0.4mm and the spacing between the pores to 0.08-1.5mm ensures that the venting micropores are evenly distributed and have a reasonable diameter, allowing the gas to be discharged evenly and smoothly, improving the venting efficiency. At the same time, it can prevent the adhesive from entering the venting channel through the venting micropores, ensuring the function of venting only and not allowing adhesive to enter.

[0025] 3. By utilizing the gap step, the resistance to gas flow inside the base can be reduced, allowing gas to flow more smoothly from the exhaust section to the guide section, thus improving exhaust efficiency. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the main overall structure in Embodiment 1 of this application;

[0027] Figure 2 This is a cross-sectional view of the main overall structure in Embodiment 2 of this application;

[0028] Figure 3 This is a cross-sectional view of the main overall structure in Embodiment 3 of this application.

[0029] Reference numerals: 1. Base; 11. Exhaust channel; 12. Exhaust section; 13. Guide section; 14. Step surface; 15. Gap step; 2. Exhaust block; 21. Exhaust micropore. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail.

[0031] This application discloses a tire mold exhaust insert structure.

[0032] Example 1:

[0033] Reference Figure 1A tire mold venting insert structure includes a base 1 and a venting block 2. The base 1 is hollow and has an internal venting channel 11. The base 1 is embedded in the tire mold. The cross-sectional shape of the base 1 can be set to a circle, rectangle, triangle or other irregular shape that fits the tire mold, so that the operator can flexibly select the shape of the base 1 that fits the structure and design requirements of different tire molds. This allows the venting insert structure to be widely used in various types of tire molds, improving the versatility and applicability of the product. In this embodiment, the base 1 is set as a cylindrical structure.

[0034] Reference Figure 1 The cross-sectional shape of the exhaust block 2 is the same as that of the base 1. In this embodiment, the exhaust block 2 is set as a cylindrical structure. The base 1 and the exhaust block 2 are formed by additive manufacturing using 3D printing technology. Finally, the exhaust block 2 is integrally formed in the exhaust channel 11 of the base 1 to prevent the glue from seeping out of the joint gap. At the same time, the integral molding process can simplify the processing flow, shorten the processing cycle, improve production efficiency, reduce processing costs, and make the structure more stable during use. It is not easy for parts to loosen or other problems to occur, which is conducive to long-term stable exhaust.

[0035] Reference Figure 1 Both the base 1 and the exhaust block 2 can be made of martensitic stainless steel, nickel-based alloy or titanium alloy. Both nickel-based alloy and titanium alloy shells have good high temperature resistance. In this embodiment, both the base 1 and the exhaust block 2 are made of martensitic stainless steel.

[0036] Reference Figure 1 Martensitic stainless steel has the characteristics of high strength, high hardness, wear resistance and good corrosion resistance, which improves the service life of base 1 and vent block 2, making them less prone to wear and corrosion during long-term use of tire molds, and ensuring the stability and reliability of the vent insert; at the same time, good wear resistance and corrosion resistance also help to reduce maintenance frequency and maintenance costs, and improve production efficiency.

[0037] Reference Figure 1 The exhaust block 2 has exhaust micro-holes 21 extending through it along its axial direction. Multiple exhaust micro-holes 21 are evenly distributed with the same diameter. The side of the exhaust block 2 near the tire mold and the side of the base 1 near the tire mold are located on the same plane. The side of the exhaust block 2 near the tire mold forms a ventilated surface for contacting the tire mold. The axial direction of any exhaust micro-hole 21 is perpendicular to the ventilated surface. Any exhaust micro-hole 21 is connected to the exhaust channel 11, so that the gas can pass through the exhaust micro-hole 21 evenly and smoothly into the exhaust channel 11 and be discharged, thereby improving the exhaust efficiency.

[0038] Reference Figure 1The diameter of any venting micro-hole 21 ranges from 0.01 to 0.4 mm, and the spacing between adjacent venting micro-holes 21 ranges from 0.08 to 1.5 mm. The operator can determine the size of the venting micro-hole 21 according to the needs of the tire mold. The appropriate venting diameter and spacing can effectively prevent rubber material from entering the venting channel 11 through the venting micro-hole 21 while ensuring the venting effect, ensuring the function of venting only and not allowing rubber to enter, thereby avoiding rubber material overflow and tire hair problems. Compared with the traditional venting structure, the uniform and regular venting micro-holes 21 can make the venting more stable, while the tire surface is cleaner and the tire dynamic balance is more stable, meeting the appearance requirements of high-end tires and improving the quality of the finished tire.

[0039] The implementation principle of this application embodiment is as follows: In actual operation, the staff first determines the shape and size of the base 1 and the vent block 2 according to the design requirements of the tire mold, and then processes the base 1 and the vent block 2 into an integral shape through additive manufacturing. Then, the insert is embedded into the severely trapped area of ​​the tire mold (such as the tire shoulder and the bottom of the tread). The contact surface of the vent block 2 is flush with the cavity of the tire mold.

[0040] During vulcanization, gas enters the exhaust channel 11 through the exhaust micropores 21 and is discharged, while the rubber compound cannot penetrate into the exhaust micropores 21 due to surface tension, thus achieving exhaust without rubber entry. During maintenance, workers can clean the blocked exhaust micropores 21 by high-pressure gas flushing, chemical solvent soaking, high-temperature baking, etc., to remove residual rubber compound.

[0041] Example 2:

[0042] The difference between Example 2 and Example 1 is that:

[0043] Reference Figure 2 The base 1 includes an integrally formed exhaust section 12 and a guide section 13. The exhaust section 12 and the guide section 13 are coaxially arranged and have the same cross-sectional shape. The cross-sectional area of ​​the exhaust section 12 is larger than that of the guide section 13, which is conducive to the flow and guidance of gas, and facilitates the rapid entry of gas into the exhaust section 12 and its discharge from the guide section 13, thereby improving exhaust efficiency.

[0044] Reference Figure 2 The overall height a of the base 1 ranges from 5 to 15 mm, the height b of the exhaust part 12 ranges from 1 to 7 mm, the height c of the guide part 13 is ab, the outer diameter d of the exhaust part 12 ranges from 1.5 to 20 mm, the outer diameter e of the guide part 13 is less than or equal to d, the diameter f of the exhaust block 2 is less than d, and the height g of the exhaust block 2 is less than b. In this embodiment, a is 13 mm, b is 5 mm, c is 7 mm, d is 6 mm, e is 4 mm, f is 4 mm, and g is 2.5 mm.

[0045] Reference Figure 2The base 1 is formed by subtractive processing, and the exhaust block 2 is made of nickel-based alloy by 3D printing additive manufacturing. The exhaust block 2 is assembled into the exhaust part 12 of the base 1 by thermal expansion and contraction, so that the inner wall of the base 1 and the outer wall of the exhaust block 2 form an interference fit, which is firm and reliable, preventing gas leakage and adhesive from entering, and ensuring the exhaust effect. At the same time, this connection method is easy to install and disassemble. When the base 1 or the exhaust block 2 is damaged or needs maintenance, it can be easily and quickly disassembled and replaced, reducing maintenance difficulty and maintenance cost.

[0046] Reference Figure 2 A stepped surface 14 is provided at the connection between the outer wall of the exhaust section 12 and the guide section 13. The stepped surface 14 is used to position the tire mold to ensure that the base 1 is installed in the tire mold accurately and to avoid poor exhaust effect or rubber leakage due to installation deviation.

[0047] Example 3:

[0048] The difference between Example 3 and Example 2 is that:

[0049] Reference Figure 3 A gap step 15 is provided at the connection between the inner wall of the exhaust section 12 and the guide section 13. In this embodiment, the gap step 15 is set as an inclined ring structure. The gap step 15 is inclined along the exhaust section 12 toward the guide section 13. The inclination angle k of the gap step 15 is in the range of 30°-80°. In this embodiment, the angle k of the gap step 15 is set to 45°.

[0050] Reference Figure 3 By utilizing the gap step 15, the gas flow path is optimized. The gap step 15 can reduce the resistance of gas flow inside the base 1, allowing the gas to flow more smoothly from the exhaust section 12 to the guide section 13, thus improving the exhaust efficiency. At the same time, the gap step 15 can also prevent gas from stagnating at the connection point, preventing exhaust problems caused by gas accumulation, and ensuring the continuity and stability of the exhaust process.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tire mold exhaust insert structure, characterized in that: The device includes a base (1) embedded in a tire mold and an exhaust block (2) for venting. The base (1) has a hollow exhaust channel (11) inside. The exhaust block (2) is disposed in the exhaust channel (11) of the base (1). The exhaust block (2) has a plurality of exhaust microholes (21) that are connected to the exhaust channel (11) evenly distributed on it. The exhaust block (2) is located on one side of the base (1) and abuts against the tire mold.

2. The tire mold exhaust insert structure according to claim 1, characterized in that: The exhaust block (2) is integrally formed inside the base (1) by additive manufacturing.

3. The tire mold exhaust insert structure according to claim 1, characterized in that: The base (1) and the exhaust block (2) are connected and fixed by means of thermal expansion and contraction.

4. The tire mold exhaust insert structure according to claim 1, characterized in that: The exhaust block (2) is made of martensitic stainless steel.

5. The tire mold exhaust insert structure according to claim 1, characterized in that: The diameter of any one of the exhaust micropores (21) is in the range of 0.01-0.4 mm, and the hole spacing between adjacent exhaust micropores (21) is in the range of 0.08-1.5 mm.

6. The tire mold exhaust insert structure according to claim 1, characterized in that: The base (1) includes an integrally formed exhaust section (12) and a guide section (13), the exhaust block (2) is disposed inside the exhaust section (12), and the cross-sectional area of ​​the exhaust section (12) is larger than the cross-sectional area of ​​the guide section (13).

7. The tire mold exhaust insert structure according to claim 6, characterized in that: A gap step (15) is provided at the connection between the exhaust section (12) and the guide section (13) to improve exhaust efficiency.

8. The tire mold exhaust insert structure according to claim 6, characterized in that: The cross-sectional shape of the base (1) can be set as a circle, rectangle, triangle or irregular shape.

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