Tire mold heating device

Abstract

The utility model discloses a tire mold heating device, which belongs to the field of rubber vulcanization and comprises a rigid inner mold, a heating block base body is arranged on the inner side of the rigid inner mold, and a bent heating pipe is arranged in the heating block base body. The heating block is provided with a wire outlet groove, and the wiring ends at the two ends of the heating pipe are located in the wire outlet groove. The heating pipe is arranged on the heating block base body on the inner side of the rigid inner mold, the single heating pipe is bent, and the number of outgoing lines of the heating pipe is small, so that the connecting and disassembling efficiency of the outgoing lines of the heating pipe can be improved, and meanwhile, the safety problem caused by excessive wiring is also reduced.

Description

Technical Field

[0001] The utility model relates to the field of rubber vulcanization, in particular to a tire mold heating device. Background Art

[0002] The last step of the tire forming process is vulcanization. To ensure that the tire is vulcanized and mature, a certain temperature and pressure must be provided during the vulcanization process. For tires that are vulcanized using steam or superheated water, the internal temperature and pressure of the tire are transmitted through the capsule during vulcanization. However, there are some problems with using capsules as intermediate transfer media, such as uneven expansion around the capsule and up and down, which leads to poor dimensional accuracy and uniformity of the vulcanized tire; the capsule has high thermal resistance as an intermediate heat transfer device, resulting in low heat transfer efficiency and poor energy utilization; water vapor condenses when it is cold and gathers at the bottom of the capsule, resulting in a large temperature difference between the upper and lower parts of the capsule, resulting in different vulcanization degrees on the upper and lower sides of the tire. Based on these problems with capsules, a large number of companies have conducted research on replacing capsule vulcanization with rigid inner molds.

[0003] Rigid inner mold instead of bladder vulcanization refers to the use of metal processing to the inner contour shape of the tire, so that the rigid inner mold replaces the bladder to shape the inner side of the tire. The use of this technology requires consideration of how to heat the rigid inner mold during the vulcanization process, and it is necessary to ensure that the heating device inside the rigid inner mold can ensure continuous heat supply during the vulcanization process, and that the temperature consistency of the rigid inner mold around the circumference and top and bottom during the vulcanization process.

[0004] In view of the above problems in the prior art, the utility model designs and manufactures a tire mold heating device to overcome the above defects. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a tire mold heating device, in which a heating tube is arranged on a heating block substrate on the inner side of a rigid inner mold, and a single heating tube is bent and arranged. The number of lead wires of the heating tube is small, which not only improves the connection and disassembly efficiency of the lead wires of the heating tube, but also reduces the safety problems caused by too many wiring connections.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a tire mold heating device, comprising a rigid inner mold, a heating block matrix is ​​provided inside the rigid inner mold, and a bent heating tube is provided inside the heating block matrix;

[0007] The heating block is provided with a wire outlet groove, and the wiring terminals at both ends of the heating tube are located in the wire outlet groove.

[0008] Preferably, the rigid inner mold includes a crown wall and an upper side wall and a lower side wall formed at both ends of the crown wall, and the heating block substrate is located in a cavity surrounded by the crown wall, the upper side wall and the lower side wall.

[0009] Preferably, the radial inner side of the upper side wall of the rigid inner mold is set as an upper sub-mouth, and a temperature measuring element is provided at the position of the upper sub-mouth.

[0010] Preferably, the heating tube is integrally cast in the heating block substrate.

[0011] Preferably, the heating block substrate comprises a bottom plate and a cover plate, the bottom plate is provided with a heating tube groove, and the heating tube is installed in the heating tube groove and fixed by the cover plate.

[0012] Preferably, a wire fixing structure for fixing the lead-out wire of the heating tube is provided on the inner side of the heating block base.

[0013] Preferably, the heating tube is bent into a U-shape, and the distance between the U-shaped heating tube and the adjacent outer contours around the heating block substrate is 8mm-12mm.

[0014] Preferably, the distance between the heating tube and the inner side of the crown wall is not less than 30 mm.

[0015] Preferably, the wire outlet groove is located at a middle height position of the heating block base.

[0016] Preferably, the heating block base is detachably connected to the inner side of the rigid inner mold by screws.

[0017] The utility model is beneficial in that:

[0018] 1. The utility model utilizes a single heating tube that is bent and arranged in the heating block matrix, and the number of lead wires of the heating tube is small, which not only improves the connection and disassembly efficiency of the lead wires of the heating tube, but also reduces the safety problems caused by too many wires. Moreover, the heating tube is bent and arranged in the heating block matrix, which can make the overall temperature uniformity of the rigid inner mold better during use. For the vulcanized tire, it can ensure that the vulcanization degree of each part of the tire is more consistent, thereby improving the performance of the tire.

[0019] 2. By setting the heating tube in the heating block matrix, the heating tube and the heating block matrix act as a heating unit to continuously provide heat to the rigid inner mold, thereby solving the problem of heating the rigid inner mold. This method can not only save steam, but also greatly improve the utilization rate of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a tire mold heating device;

[0021] Figure 2 It is a main perspective view of the utility model;

[0022] Figure 3 It is a side perspective view of the utility model;

[0023] Figure 4It is a schematic diagram of the separate installation of the heating tube and the heating block base of the utility model;

[0024] Figure 5 This is a schematic diagram of the integral installation of the heating tube and the heating block base of the utility model.

[0025] In the figure: 1-crown wall, 2-upper side wall, 3-lower side wall, 4-upper sub-mouth, 5-heating block substrate, 6-fixed wire structure, 7-wire outlet groove, 8-heating tube, 9-temperature measuring element, 10-bottom plate, 11-cover plate, 12-heating tube groove. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 5 As shown, a tire mold heating device comprises a rigid inner mold, a heating block base 5 is provided on the inner side of the rigid inner mold, the heating block base 5 is preferably detachably connected to the inner side of the rigid inner mold by screws, a bent heating tube 8 is provided inside the heating block base 5, and a wire outlet groove 7 is provided on the heating block, and the wiring terminals at both ends of the heating tube 8 are located in the wire outlet groove 7. The above structure uses a single heating tube 8 to be bent and set in the heating block base 5, and the number of lead wires of the heating tube 8 is small, so that not only the connection and disassembly efficiency of the lead wires of the heating tube 8 can be improved, but also the safety problems caused by too many wires can be reduced, and the heating tube 8 is bent and set in the heating block base 5, which can make the overall temperature uniformity of the rigid inner mold better during use. For the vulcanized tire, it can ensure that the vulcanization degree of each part of the tire is more consistent, thereby improving the performance of the tire.

[0028] The rigid inner mold body includes a crown wall 1 and an upper side wall 2 and a lower side wall 3 formed at both ends of the crown wall 1. The heating block base 5 is located in a cavity surrounded by the crown wall 1, the upper side wall 2 and the lower side wall 3. The radial inner side of the upper side wall 2 of the rigid inner mold is set as an upper sub-mouth 4. A temperature measuring element 9 is provided at the upper sub-mouth 4. Of course, the temperature measuring element 9 can also be set at other positions of the rigid inner mold. The temperature measuring element 9 of the utility model is set at the upper sub-mouth 4, which is more convenient for disassembly and replacement of the temperature measuring element 9. The actual temperature of the rigid inner mold is fed back in real time through the installed temperature measuring element 9, which facilitates the control system to control the power output of the heating tube 8.

[0029] The installation method of the heating tube 8 and the heating block base 5 of the utility model can be split or integrated. The integrated type is to cast the heating tube 8 in the heating block base 5 as a whole. Specifically, the heating tube 8 is first bent into a fixed shape and then directly cast into the heating block base 5. The split type includes a bottom plate 10 and a cover plate 11 provided with a heating tube groove 12. The heating tube groove 12 matches the shape of the heating tube 8, and the heating tube groove 12 is enclosed in the heating tube groove 12 of the bottom plate 10 by the cover plate 11. Both of the above methods use the heating tube 8 and the heating block base 5 as a heating unit to continuously heat the rigid inner mold, which solves the problem of heating the rigid inner mold. This method can not only save steam, but also greatly improve the utilization rate of energy.

[0030] A wire fixing structure 6 for fixing the lead wires of the heating tube 8 is provided inside the heating block base 5 , and the wire fixing structure 6 is preferably fastened to the inside of the heating base by screws.

[0031] The heating tube 8 is preferably bent into a square shape, and the outlet groove 7 is preferably located at the middle height position of the heating block base 5. The distance between the square heating tube 8 and the adjacent external contours of the heating block base 5 is 8mm-12mm. This distance can ensure that the heating block base 5 is easy to process and that there is a small heat transfer path between the heating tube 8 and the rigid inner mold. The distance between the heating tube 8 and the inner side of the crown wall 1 is not less than 30mm. This distance is set because the rigid inner mold surface is thinner. If the heating tube 8 is too close to the rigid inner mold, it will cause the rigid inner mold surface to overheat, thereby affecting the uniformity of the overall temperature of the rigid inner mold.

[0032] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A tire mold heating device, characterized in that: It comprises a rigid inner mold, a heating block base (5) is provided on the inner side of the rigid inner mold, and a bent heating tube (8) is provided inside the heating block base (5); The heating block is provided with a wire outlet groove (7), and the wiring terminals at both ends of the heating tube (8) are located in the wire outlet groove (7).

2. A tire mold heating device according to claim 1, characterized in that: The rigid inner mold comprises a crown wall (1) and an upper side wall (2) and a lower side wall (3) formed at both ends of the crown wall (1); the heating block substrate (5) is located in a cavity surrounded by the crown wall (1), the upper side wall (2) and the lower side wall (3).

3. A tire mold heating device according to claim 2, characterized in that: The radial inner side of the upper side wall (2) of the rigid inner mold is set as an upper sub-mouth (4), and a temperature measuring element (9) is provided at the position of the upper sub-mouth (4).

4. A tire mold heating device according to claim 1, characterized in that: The heating tube (8) is integrally cast in the heating block base (5).

5. A tire mold heating device according to claim 1, characterized in that: The heating block base (5) comprises a bottom plate (10) and a cover plate (11); a heating tube groove (12) is provided on the bottom plate (10); the heating tube (8) is installed in the heating tube groove (12) and then fixed by the cover plate (11).

6. A tire mold heating device according to claim 1, characterized in that: A wire fixing structure (6) for fixing the lead wire of the heating tube (8) is provided on the inner side of the heating block base (5).

7. A tire mold heating device according to claim 1, characterized in that: The heating tube (8) is bent into a square shape, and the distance between the square-shaped heating tube (8) and the adjacent external contours of the heating block substrate (5) is 8 mm to 12 mm.

8. A tire mold heating device according to claim 7, characterized in that: The distance between the heating tube (8) and the inner side of the crown wall (1) is not less than 30 mm.

9. A tire mold heating device according to claim 7, characterized in that: The wire outlet groove (7) is located at a middle height position of the heating block base (5).

10. The tire mold heating device according to claim 1, characterized in that: The heating block base (5) is detachably connected to the inner side of the rigid inner mold by means of screws.

Images