A tire vulcanization temperature measuring protection device

Abstract

The utility model discloses a kind of tire vulcanization temperature measuring protection devices, including base, cavity assembly and wire protection tube, lower side plate or lower steel ring is equipped with lead hole, lead hole lower end is connected with lead slot through connection;Wire protection tube is set in lead hole, the inside diameter of wire protection tube is configured as with the outside diameter of temperature measuring thermocouple wire bundle compatible;The outer circle of wire protection tube upper end and inner hole place and the lower end of wire protection tube inner hole are each equipped with fillet.The utility model passes through in lead hole setting hollow tubular structure's wire protection tube, while guaranteeing that temperature measuring thermocouple wire bundle can slide in wire protection tube inner hole, temperature measuring thermocouple wire bundle and the gap between wire protection tube inner hole too large is avoided, leading vulcanization capsule is extruded broken, causes vulcanization capsule high temperature steam exhalation accident;In addition, rounded corner is set in the contact part of temperature measuring thermocouple wire bundle and wire protection tube, temperature measuring's demand of meeting is met, wire bundle is cut off under pressure in installation or vulcanization process, is repeatedly avoided.

Description

Technical Field

[0001] This utility model belongs to the field of tire vulcanization, and specifically relates to a tire vulcanization temperature measurement and protection device. Background Technology

[0002] The tire vulcanization process is a core step in tire production that determines the final performance of the tire. Essentially, it involves the synergistic effect of specific temperature, pressure, and time to promote a full cross-linking reaction between the rubber raw material and the vulcanizing agent, thereby forming a stable three-dimensional network structure. This ultimately endows the tire with key properties such as wear resistance, tear resistance, and aging resistance. Among the three core process elements of temperature, pressure, and time, precise control and real-time monitoring of the vulcanization temperature are particularly crucial, directly determining the quality of tire vulcanization.

[0003] Specifically, if the vulcanization temperature is lower than the preset process threshold, the cross-linking reaction of the rubber raw materials will not be fully carried out, resulting in insufficient cross-linking of the tire carcass. This can lead to quality defects in the final product, such as a soft tire carcass, weak load-bearing capacity, and poor durability, significantly shortening the tire's lifespan. Conversely, if the vulcanization temperature is too high or the temperature distribution in different parts of the tire blank is uneven, it will cause excessive cross-linking of the rubber, localized aging, and serious quality problems such as tire bulges and cracks. This not only affects the tire's appearance and performance but also impacts driving safety. Therefore, real-time, accurate, and stable monitoring of the temperature of various key parts of the tire during the vulcanization process is a necessary prerequisite for ensuring tire production quality and mitigating safety risks.

[0004] For tire manufacturers, before officially mass-producing a new model, specification, or category of tire, multiple rounds of vulcanization process exploration and verification are required. During this stage, technicians need to design various vulcanization process schemes with different parameters based on the structural characteristics and performance requirements of the tire model, and conduct repeated temperature measurement tests on each scheme. By collecting temperature data from different parts of the tire blank during each temperature measurement test, and combining the data calculation results, the uniformity and sufficiency of vulcanization under this process are analyzed to determine whether the vulcanization quality meets the standards. Finally, the optimal vulcanization process parameters are selected through comparison of multiple schemes. Only after determining the optimal process will the company start formal mass vulcanization production. Therefore, the temperature measurement step in the tire vulcanization process is not only a routine quality control method for tire manufacturers, but also an indispensable core process in new product development and process optimization. The stability and reliability of its testing directly affect the company's R&D efficiency and production benefits.

[0005] Currently, the mainstream temperature measurement method during tire vulcanization is thermocouple temperature measurement technology. The standard operating procedure is as follows: The positive and negative terminals of one end of the thermocouple harness are short-circuited and then directly fixed to a key temperature measurement point on the surface or inside the tire blank; the other end of the thermocouple harness is then passed through the vulcanization mold, leading from inside the vulcanization chamber to the outside of the vulcanizing machine; finally, the positive and negative terminals of the thermocouple harness are precisely connected to the positive and negative terminals of the dedicated vulcanization temperature measurement device, thereby achieving real-time acquisition and recording of the temperature during tire vulcanization. In this process, the lead-in method of the thermocouple harness directly affects the stability and safety of the temperature measurement. Currently, the industry mainly uses the following two lead-in methods: The first lead wire method is as follows: Figure 1 As shown, a lead-in hole is pre-drilled on the cavity surface of the lower side plate 7, through which the thermocouple wire harness is led out from inside the vulcanizing cavity. However, this lead-in method has a significant drawback: since the lead-in hole is located on the cavity surface of the lower side plate, and the cavity surface must strictly follow the curve design of the tire tread pattern, if a chamfered protective structure is added to the hole opening to prevent the thermocouple wire harness from being cut by the sharp edges of the lead-in hole, it will directly destroy the original curve shape of the cavity surface, resulting in a decrease in the forming accuracy of the tire tread pattern, affecting the tire's appearance quality and driving performance. Therefore, this lead-in method cannot achieve protection for the thermocouple wire harness by adding a chamfer. In the actual temperature measurement process, the thermocouple wire harness is in direct contact with the sharp edges of the lead-in hole. Under the action of the vulcanizing machine's mold closing pressure and the tire blank expansion, it is very easy to be cut by the sharp edges, resulting in interruption of temperature data acquisition. This not only causes single temperature measurement failures but also fails to meet the test requirements of multiple rounds of repeatable temperature measurement, seriously affecting the efficiency of process exploration.

[0006] The second lead wire method is as follows: Figure 2As shown, a lead hole is drilled at the upper end face of the lower steel ring 8. The thermocouple wire bundle extends downward through this lead hole and is led out to the outside via the central mechanism of the vulcanizing machine. Compared with the first method, the lead hole of this method is located outside the cavity curve range. Theoretically, the thermocouple wire bundle can be protected by adding an inverted arc structure at the orifice. However, in practical applications, it still faces multiple problems: Firstly, due to the different process schemes for each temperature measurement test, the number of key monitoring points varies, resulting in an inconsistent number of thermocouple wires used for each temperature measurement. To adapt to the extreme case with the largest number of thermocouple wires, the lead hole needs to be designed with a larger diameter; however, when the number of thermocouple wires is small, there will be a large number of gaps in the lead hole. Under the strong force of the internal pressure of the vulcanizing capsule 11 during the vulcanization process, the thermocouple wire bundle will still experience severe friction with the edge of the lead hole. Even with inverted arc protection, it may still be cut, resulting in the loss of temperature measurement data. On the other hand, the location of the lead hole is precisely the area of ​​direct contact between the vulcanizing capsule and the mold. When the number of thermocouple wires is small, the gaps in the lead hole can cause the vulcanizing capsule to bulge and be squeezed into the hole under pressure, which can easily cause the vulcanizing capsule 11 to rupture. This will not only directly lead to the failure of this temperature measurement test, but also cause a safety accident of high-temperature steam leakage from the vulcanizing capsule 11, posing a serious threat to the safety of the equipment and operators. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a tire vulcanization temperature measurement protection device to solve the technical defects of the thermocouple temperature measurement lead method used in the current tire vulcanization process, such as easy breakage of the temperature measurement thermocouple wire bundle, poor temperature measurement stability, inability to meet the repeatability of temperature measurement requirements, and potential rupture of the vulcanization capsule, which may cause safety risks.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A tire vulcanization temperature monitoring and protection device, comprising: The base is used to support the cavity assembly; A cavity assembly includes a patterned block, an upper side plate disposed on the upper part of the patterned block, an upper steel ring and an upper auxiliary steel ring disposed on one side of the upper side plate, an upper clamping ring disposed on one side of the upper auxiliary steel ring, a lower side plate disposed on the lower part of the patterned block, a lower steel ring disposed on one side of the lower side plate, and a lower clamping ring disposed on one side of the lower steel ring. The lower side plate or the lower steel ring is provided with a lead wire hole, and a lead wire groove is connected through the lower end of the lead wire hole. A protective tube is installed inside the lead hole to protect the thermocouple wire bundle. The protective tube has a hollow tubular structure, and its inner diameter is configured to match the outer diameter of the thermocouple wire bundle. The outer ring and inner hole at the upper end of the protective tube, as well as the lower end of the inner hole of the protective tube, are all provided with rounded corners.

[0009] Furthermore, the gap between the inner wall of the protective tube and the thermocouple wire bundle is 1mm to 5mm.

[0010] Furthermore, the range of the fillet diameter Rf of the outer ring at the upper end of the protective tube, the fillet diameter Rg of the inner ring, and the fillet diameter Rh of the lower end of the inner hole of the protective tube is R1mm to R10mm.

[0011] Furthermore, the lead hole is a countersunk hole, and the upper end of the protective tube is provided with a countersunk positioning boss that matches the countersunk groove of the countersunk hole.

[0012] Furthermore, the protective tube and the lead hole are fitted together.

[0013] Furthermore, the height b of the countersunk positioning boss is less than or equal to the depth B of the countersunk hole; the length d of the wire protector is less than the depth D of the lead hole.

[0014] Furthermore, when the upper surface of the lower side plate or lower steel ring is inclined, the inclination angle j of the upper surface of the protective tube is equal to the inclination angle J of the upper surface of the lower side plate or lower steel ring.

[0015] Furthermore, it also includes a sealing plate, which is installed in the countersunk groove of the lead hole, and after the sealing plate is installed, its upper end face is flush with the upper end face of the lower side plate or the lower steel ring, for sealing the countersunk groove of the lead hole after the temperature measurement is completed.

[0016] Furthermore, when the countersunk groove of the lead hole is flat, the sealing plate is transitionally fitted or threadedly connected to the countersunk groove; when the countersunk groove of the lead hole is inclined, the sealing plate is interference-fitted with the countersunk groove.

[0017] The beneficial effects of this utility model are: (1) This utility model provides a hollow tubular protective tube inside the lead hole, and the protective tube is fitted with the thermocouple wire bundle with a gap. This ensures that the thermocouple wire bundle can slide in the inner hole of the protective tube, while avoiding the risk of the vulcanizing capsule being squeezed and the high-temperature steam inside the vulcanizing capsule being leaked due to an excessive gap between the thermocouple wire bundle and the inner hole of the protective tube. In addition, a rounded corner is provided at the contact part between the thermocouple wire bundle and the protective tube to prevent the wire bundle from being cut by pressure during installation or vulcanization, thus meeting the requirements for repeatable temperature measurement.

[0018] (2) The lead hole adopts a countersunk hole, and a countersunk positioning boss is set at the upper end of the protective tube. The countersunk hole and the countersunk positioning boss adopt a transition fit to ensure the stability of the protective tube installation and take into account the convenience of disassembly and assembly.

[0019] (3) The height of the countersunk positioning boss is less than the depth of the countersunk hole; the length of the protective tube is less than the depth of the lead hole; the inclination angle of the upper end face is consistent with the upper end face of the lower side plate or the lower steel ring, which avoids the protective tube from being higher than the surface of the cavity, prevents the protective tube from affecting the tire molding quality or scratching the vulcanized bladder, and extends the service life of the bladder; in addition, the length of the protective tube is adapted to the lead hole, ensuring that the wire harness is smoothly led out from the lead groove.

[0020] (4) By setting a sealing plate in the countersunk groove and sealing the lead hole after the temperature measurement is completed, the lower side plate or lower steel ring can be directly used for conventional tire vulcanization without the need to make special parts, thus reducing production costs. Attached Figure Description

[0021] Figure 1 This is one of the lead-out methods for temperature-measuring thermocouple harnesses in existing technology.

[0022] Figure 2 This is another way to lead out the thermocouple harness in the existing technology.

[0023] Figure 3 This is a schematic diagram of the assembly of the protective tube and the lower steel ring when the upper end face of the lower steel ring is flat.

[0024] Figure 4 This is a partial sectional view of the lower steel ring.

[0025] Figure 5 This is a cross-sectional view of the conduit.

[0026] Figure 6 This is a schematic diagram of the assembly of the protective tube and the lower steel ring when the upper end face of the lower steel ring is a slope.

[0027] Figure 7 This is a sectional view when the upper end face of the lower steel ring is an inclined plane.

[0028] Figure 8 This is a cross-sectional view of the protective tube when the upper end face of the lower steel ring is a slope.

[0029] Figure 9 This is a schematic diagram showing the assembly of the cable guide tube and the lower side plate when the lead hole is located on the lower side plate.

[0030] Figure 10 This is a schematic diagram of the assembly of the sealing plate and the lower steel ring.

[0031] In the diagram, 1. Patterned block; 2. Upper side plate; 3. Upper steel ring; 4. Upper auxiliary steel ring; 5. Upper clamping ring; 6. Base; 7. Lower side plate; 8. Lower steel ring; 9. Lower clamping ring; 10. Tire blank; 11. Vulcanizing bladder; 12. Lead wire groove; 13. Lead wire hole; 14. Temperature measuring thermocouple wire harness; 15. Protective tube; 16. Sealing plate. Detailed Implementation

[0032] The following will be combined with the appendix Figures 1-10 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0034] Example 1 like Figure 1-3 As shown, a tire vulcanization temperature monitoring and protection device includes a base 6, a cavity assembly, and a protective tube 15. The base 6 supports the cavity assembly. The cavity assembly includes a tread block 1, an upper side plate 2 disposed on the upper part of the tread block 1, an upper steel ring 3 and an upper auxiliary steel ring 4 disposed on one side of the upper side plate 2, an upper clamping ring 5 disposed on one side of the upper auxiliary steel ring 4, a lower side plate 7 disposed on the lower part of the tread block 1, a lower steel ring 8 disposed on one side of the lower side plate 7, and a lower clamping ring 9 disposed on one side of the lower steel ring 8. Figure 4 , Figure 9 As shown, the lower side plate 7 or the lower steel ring 8 is provided with a lead wire hole 13, and the lower end of the lead wire hole 13 is connected to the lead wire groove 12. In this embodiment, the upper end surface of the lower side plate 7 or the lower steel ring 8 is a plane.

[0035] like Figure 3 As shown, the protective tube 15 is disposed inside the lead hole 13 to protect the thermocouple wire bundle 14. The protective tube 15 is a hollow tubular structure, and the inner diameter of the protective tube 15 is configured to match the outer diameter of the thermocouple wire bundle 14, so that the thermocouple wire bundle 14 can be inserted into the protective tube 15 and fit with the inner wall of the protective tube 15 with a clearance. The outer ring and inner hole at the upper end of the protective tube 15 and the lower end of the inner hole of the protective tube 15 are provided with rounded corners to prevent the thermocouple wire bundle 14 from being cut by pressure.

[0036] In this embodiment, the gap between the inner wall of the protective tube 15 and the temperature measuring thermocouple wire bundle 14 is 1mm to 5mm. This ensures that the temperature measuring thermocouple wire bundle 14 can slide in the inner hole of the protective tube 15, while also preventing the temperature measuring thermocouple wire bundle 14 from being squeezed and ruptured due to an excessive gap between the inner hole of the protective tube 15, which would cause a high-temperature steam leakage accident inside the vulcanizing capsule 11.

[0037] like Figure 5 As shown, the range of the fillet diameter Rf of the outer ring at the upper end of the protective tube 15, the fillet diameter Rg of the inner ring, and the fillet diameter Rh of the lower end of the inner hole of the protective tube 15 is R1mm to R10mm.

[0038] like Figure 4 As shown, the lead hole 13 is a countersunk hole, such as... Figure 5 As shown, the upper end of the protective tube 15 is provided with a countersunk positioning boss that matches the countersunk groove of the countersunk hole, which ensures the stability of the protective tube 15 when installed on the lower side plate 7 or the lower steel ring 8.

[0039] In this embodiment, the protective tube 15 and the lead hole 13 are transitionally fitted. Specifically, the outer diameter of the protective tube 15 body is transitionally fitted with the inner diameter of the lead hole 13, and the outer diameter of the countersunk positioning boss of the protective tube 15 is transitionally fitted with the countersunk hole of the lead hole 13. This ensures the tightness of the assembly of the protective tube 15 and the lead hole 13, and also facilitates the quick assembly and disassembly of the two.

[0040] like Figure 4 , Figure 5 As shown, the height b of the countersunk positioning boss is less than or equal to the depth B of the countersunk hole, so as to prevent the wire protection tube 15 from protruding above the cavity surface and affecting the molding quality of the tire or the service life of the vulcanizing bladder 11; the length d of the wire protection tube 15 is less than the depth D of the lead hole 13, so as to facilitate the smooth lead-out of the temperature measuring thermocouple wire harness 14 from the lead groove 12.

[0041] like Figure 10 As shown, it also includes a sealing plate 16, which is installed in the countersunk groove of the lead hole 13. After the sealing plate 16 is installed, its upper end face is flush with the upper end face of the lower side plate 7 or the lower steel ring 8. It is used to seal the countersunk groove of the lead hole 13 after the temperature measurement is completed. After the lead hole 13 is sealed, the lower side plate 7 or the lower steel ring 8 can be vulcanized normally after the experiment, without the need for additional production of the lower side plate 7 or the lower steel ring 8, thus reducing the cost of tire vulcanization production.

[0042] like Figure 10 As shown, the countersunk groove of the lead hole 13 is a flat surface, and the sealing plate 16 is interference-fitted or threaded with the countersunk groove. In other embodiments, when the countersunk groove of the lead hole 13 is a slope, the sealing plate 16 is interference-fitted with the countersunk groove. While ensuring the stability of the connection between the sealing plate 16 and the lead hole 13, the ease of disassembly and assembly of the sealing plate 16 is improved.

[0043] Example 2 Unlike Example 1, as Figures 6-8As shown, the upper surface of the lower side plate 7 or the lower steel ring 8 is a slope. In this embodiment, the inclination angle j of the upper surface of the protective tube 15 is equal to the inclination angle J of the upper surface of the lower side plate 7 or the lower steel ring 8.

[0044] Before temperature measurement, insert the protective tube 15 into the lead hole 13 of the lower side plate 7 or the lower steel ring 8. Use the countersunk positioning boss to engage with the countersunk groove of the lead hole 13 to ensure the protective tube 15 is stably fixed and its upper end does not protrude above the cavity surface. Insert the thermocouple wire harness 14 through the hollow inner hole of the protective tube 15, and then out through the lead groove 12 at the lower end of the lead hole 13. The wire harness and the protective tube 15 maintain a clearance fit, allowing for free sliding.

[0045] Assemble components such as the tread block 1, upper and lower side plates, and upper and lower steel rims according to the structure to form the tire vulcanizing cavity. At this time, the cable protection tube 15 is located at the bottom of the cavity along with the lower side plate 7 or the lower steel rim 8, protecting the cable harness from being squeezed by the cavity components. Start the vulcanizing equipment to vulcanize the tire blank 10. Thermocouple cable harness 14 monitors the vulcanization temperature in real time and transmits the data to external equipment through lead hole 13 and lead groove 12.

[0046] After the vulcanization temperature measurement is completed, first pull the temperature measuring thermocouple wire harness 14 out of the protective tube 15, then remove the protective tube 15, and install the sealing plate 16 into the countersunk groove of the lead hole 13, ensuring that the upper end of the sealing plate 16 is flush with the upper surface of the lower side plate 7 or the lower steel ring 8. After the sealing is completed, the lower side plate 7 or the lower steel ring 8 can be directly used for conventional tire vulcanization production without the need for additional production of new parts.

[0047] In addition, since this solution is versatile and the inner diameter of the protective tube 15 can be designed and selected according to actual needs, tire manufacturers can quickly match various vulcanization temperature measurement test requirements by stockpiling multiple sets of protective tubes 15 with different inner diameters, thus improving operational convenience.

[0048] The above content is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the structure of the utility model, they should all fall within the protection scope of this utility model.

Claims

1. A tire vulcanization temperature monitoring and protection device, characterized in that, include: Base (6) is used to support the cavity assembly; Cavity assembly, the cavity assembly includes a patterned block (1), an upper side plate (2) disposed on the upper part of the patterned block (1), an upper steel ring (3) and an upper auxiliary steel ring (4) disposed on one side of the upper side plate (2), an upper clamping ring (5) disposed on one side of the upper auxiliary steel ring (4), a lower side plate (7) disposed on the lower part of the patterned block (1), a lower steel ring (8) disposed on one side of the lower side plate (7), and a lower clamping ring (9) disposed on one side of the lower steel ring (8). The lower side plate (7) or the lower steel ring (8) is provided with a lead wire hole (13), and the lower end of the lead wire hole (13) is connected to a lead wire groove (12). A protective tube (15) is disposed inside the lead hole (13) to protect the thermocouple wire bundle (14). The protective tube (15) is a hollow tubular structure, and the inner diameter of the protective tube (15) is configured to match the outer diameter of the thermocouple wire bundle (14). The outer ring and inner hole at the upper end of the protective tube (15) and the lower end of the inner hole of the protective tube (15) are all provided with rounded corners.

2. The tire vulcanization temperature measurement and protection device according to claim 1, characterized in that, The gap between the inner wall of the protective tube (15) and the thermocouple wire bundle (14) is 1 mm to 5 mm.

3. The tire vulcanization temperature measurement and protection device according to claim 1, characterized in that, The range of the radius of the outer circle of the upper end of the protective tube (15), the radius of the inner circle, the radius of the lower end of the inner hole of the protective tube (15), and the radius of the lower end of the inner hole of the protective tube (15) is R1mm~R10mm.

4. A tire vulcanization temperature monitoring and protection device according to any one of claims 1-3, characterized in that, The lead hole (13) is a countersunk hole, and the upper end of the protective tube (15) is provided with a countersunk positioning boss that matches the countersunk groove of the countersunk hole.

5. The tire vulcanization temperature measurement and protection device according to claim 1, characterized in that, The protective tube (15) is fitted with the lead hole (13).

6. The tire vulcanization temperature measurement and protection device according to claim 4, characterized in that, The height b of the countersunk positioning boss is less than or equal to the depth B of the countersunk hole; the length d of the wire protector (15) is less than the depth D of the lead hole (13).

7. A tire vulcanization temperature measurement and protection device according to claim 4, characterized in that, When the upper surface of the lower side plate (7) or the lower steel ring (8) is inclined, the inclination angle j of the upper surface of the protective tube (15) is equal to the inclination angle J of the upper surface of the lower side plate (7) or the lower steel ring (8).

8. A tire vulcanization temperature measurement and protection device according to claim 4, characterized in that, It also includes a sealing plate (16), which is installed in the countersunk groove of the lead hole (13). After the sealing plate (16) is installed, its upper end face is flush with the upper end face of the lower side plate (7) or the lower steel ring (8) for sealing the countersunk groove of the lead hole (13) after the temperature measurement is completed.

9. A tire vulcanization temperature measurement and protection device according to claim 8, characterized in that, When the countersunk groove of the lead hole (13) is a flat surface, the sealing plate (16) is interference-fitted with the countersunk groove or threaded. When the countersunk groove of the lead hole (13) is a slope, the sealing plate (16) is interference-fitted with the countersunk groove.

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