Production mold for tire without tire burrs

Abstract

The production mold comprises a mold body and exhaust nails, the mold body is arranged in a circular ring shape, a plurality of exhaust holes are evenly formed in the mold body in a penetrating mode, the exhaust nails are embedded in the exhaust holes, each exhaust nail comprises a nail pipe and a sealing head, and an exhaust channel is formed in each exhaust nail in a penetrating mode; the sealing head is in a loofah sponge shape and located at an inlet of the exhaust channel. Compared with the prior art, the invention has the following advantages and effects: by arranging the exhaust hole with the built-in exhaust nail and arranging the loofah sponge-shaped sealing head in the exhaust nail, only air can be allowed to pass through and sizing material macromolecules are not allowed to pass through in the tire vulcanization molding process, so that the tire sizing material is completely reserved in the mold cavity, the tire is free of tire hair, and the tire quality is improved. Later treatment of the blank hair is not needed, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of tire production and processing, and in particular to a tire production mold without tire hair. Background Art

[0002] Tire vulcanization is a vital process in the rubber industry, which refers to the process of converting linear or branched rubber molecules into a three-dimensional network structure by chemically reacting raw rubber with sulfur or other cross-linking agents through heating. This process significantly improves the physical and mechanical properties of rubber materials, such as elasticity, wear resistance and strength, making them more suitable for tire manufacturing.

[0003] In the traditional tire vulcanization process, the tire is usually placed in a mold for heating to achieve automatic formation of the tire surface pattern. However, the traditional mold is usually provided with a through-type exhaust hole to allow hot air to pass through during the tire vulcanization process. However, during the vulcanization process, some rubber will flow into the exhaust hole, and eventually the surface of the molded tire will be covered with tire hair. The tire hair needs to be processed later, which affects production efficiency and needs to be improved. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a tire production mold without fetal hair, which has the effect of improving production efficiency.

[0005] The above technical purpose of the present invention is achieved through the following technical scheme: a tire production mold without tire hair, including a mold body and an exhaust nail, the mold body is arranged in a circular ring shape, and a plurality of exhaust holes are evenly arranged through it, the exhaust nail is embedded in each of the exhaust holes, the exhaust nail includes a nail tube and a sealing head, an exhaust channel is formed through the exhaust nail, the sealing head is in the shape of a loofah, and is located at the entrance of the exhaust channel.

[0006] In a preferred example, the present invention can be further configured as follows: the exhaust channel includes an inner air channel, an outer air channel and a connecting air channel, the inner air channel and the outer air channel respectively pass through the inner wall and the outer wall of the mold body, the aperture of the inner air channel is larger than the aperture of the outer air channel, and the connecting air channel is arranged between the inner air channel and the outer air channel in a constricted shape from the inside to the outside.

[0007] In a preferred example, the present invention can be further configured as follows: the nail tube includes an inner tube segment, an outer tube segment and a connecting tube segment corresponding to the inner airway, the outer airway and the connecting airway, the outer diameter of the inner tube segment is larger than the outer diameter of the outer tube segment, the connecting tube segment is arranged between the inner tube segment and the outer tube segment in a tapered shape from the inside to the outside, and the inner wall shape of the exhaust hole is the same as the outer wall shape of the exhaust nail.

[0008] In a preferred example, the present invention can be further configured as follows: the wall thickness at the position of the inner pipe section is smaller than the wall thickness at the position of the outer pipe section, and the wall thickness of the connecting pipe section is gradually increased from the inside to the outside.

[0009] In a preferred example, the present invention can be further configured as follows: the mold body includes a plurality of templates and forming core blocks, the templates are arranged in an arc shape and connected end to end to form a circular ring, and the forming core blocks are arranged on the inner wall of the template.

[0010] In a preferred example, the present invention can be further configured as follows: the forming core block includes four forming edges and a plurality of forming plates, the four forming edges are spaced apart on the inner wall of the template and extend along the arc direction thereof, and the forming plates are arranged on both sides of the two forming edges on the two sides.

[0011] In a preferred example, the present invention can be further configured as follows: the sides of the two shaped edges on the two sides facing away from each other and the sides of the two innermost shaped edges close to each other are both vertically and spaced apart with clips.

[0012] In a preferred example, the present invention can be further configured as follows: the forming plates on both sides of each outermost forming edge are arranged in a staggered manner.

[0013] In summary, the present invention has the following beneficial effects: 1. By providing an exhaust hole with an exhaust nail inside and a loofah-shaped sealing head inside the exhaust nail, during the tire vulcanization molding process, only air can be allowed to pass through, and no rubber macromolecules can be allowed to pass through, so that the tire rubber is completely retained in the mold cavity, so that the tire has no tire hair, and there is no need to deal with the tire hair later, thereby improving production efficiency; 2. By setting the exhaust pin with its own clamping structure, the exhaust pin can be clamped and fixed from the inside to the outside without the need for other fasteners, so that the exhaust pin can be automatically installed and fixed, and the mold can be quickly assembled and applied; 3. By dividing the entire mold into a multi-section flexible mold, the entire mold is easy to open, thereby achieving rapid demoulding of the tire after molding and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 is a schematic structural diagram of a mold body of an embodiment; Figure 3 is a schematic structural diagram of an exhaust nail of an embodiment; Figure 4 Schematic diagram of the internal structure of the exhaust nail of the embodiment.

[0015] Figure numerals: 1. mold body; 11. template; 12. forming core block; 13. forming edge; 14. forming plate; 15. clamping strip; 2. exhaust nail; 21. nail tube; 211. inner tube section; 212. outer tube section; 213. connecting tube section; 22. sealing head; 23. exhaust channel; 231. inner air duct; 232. outer air duct; 233. connecting air duct; 3. exhaust hole. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0017] like Figure 1 , Figure 2 As shown, a tire production mold without bead hair includes a mold body 1 and an exhaust nail 2. The mold body 1 is arranged in a circular ring shape. The mold body 1 includes multiple templates 11 and forming core blocks 12. The templates 11 are arranged in an arc shape and are connected end to end to form a circular ring. The whole mold is divided into a multi-section active mold, which is convenient for opening the whole mold, thereby realizing rapid demolding of the tire after molding and improving production efficiency.

[0018] like Figure 1 , Figure 2 As shown, the forming core block 12 is arranged on the inner wall of the template 11, and the forming core block 12 includes four forming edges 13 and a plurality of forming plates 14. The four forming edges 13 are arranged at intervals on the inner wall of the template 11 and extend along the arc direction thereof to form grooves on the tire. The two sides of the two forming edges 13 on the two sides and the two sides of the two innermost forming edges 13 on the two sides are arranged vertically and at intervals with clips 15 to form anti-skid fine lines in the grooves on the tire.

[0019] like Figure 1 , Figure 2 As shown, the forming plates 14 are arranged on both sides of the two outermost forming edges 13, and the forming plates 14 on both sides of each outermost forming edge 13 are arranged in a staggered manner to form transverse grooves on the tire surface, and the transverse grooves are arranged in a staggered manner to ensure the anti-skid effect of the tire.

[0020] like Figure 2 , Figure 3 As shown, each template 11 is evenly penetrated with a plurality of exhaust holes 3, and an exhaust nail 2 is embedded in each exhaust hole 3. The exhaust nail 2 includes a nail tube 21 and a sealing head 22. An exhaust channel 23 is formed through the exhaust nail 2. The sealing head 22 is in the shape of a loofah and is located at the entrance of the exhaust channel 23.

[0021] Therefore, by providing an exhaust hole 3 with an exhaust nail 2 built in, and providing a loofah-shaped sealing head 22 in the exhaust nail 2, during the tire vulcanization molding process, only air can be allowed to pass through, and large molecules of the rubber are not allowed to pass through, so that the tire rubber is completely retained in the mold cavity, the tire is free of fetal hair, and there is no need to process the fetal hair later, thereby improving production efficiency.

[0022] like Figure 3 , Figure 4 As shown, the exhaust channel 23 includes an inner air channel 231, an outer air channel 232 and a connecting air channel 233. The inner air channel 231 and the outer air channel 232 respectively penetrate the inner wall and the outer wall of the mold body 1. The aperture of the inner air channel 231 is larger than the aperture of the outer air channel 232. The connecting air channel 233 is arranged between the inner air channel 231 and the outer air channel 232 in a constricted shape from the inside to the outside.

[0023] Therefore, by setting a connecting air channel 233 with a gradually changing aperture from the inside to the outside, so as to connect the inner air channel 231 and the outer air channel 232 with different apertures, a siphon channel can be formed inside the entire exhaust channel 23, so that the gas can be discharged faster in the second half and the gas in the first half can be sucked, thereby realizing the rapid discharge of the gas in the mold cavity and improving the tire molding efficiency.

[0024] like Figure 3 , Figure 4 As shown, the nail tube 21 includes an inner tube segment 211, an outer tube segment 212 and a connecting tube segment 213 corresponding to the inner airway 231, the outer airway 232 and the connecting airway 233. The outer diameter of the inner tube segment 211 is larger than the outer diameter of the outer tube segment 212. The connecting tube segment 213 is arranged between the inner tube segment 211 and the outer tube segment 212 in a tapered shape from the inside to the outside. The inner wall shape of the exhaust hole 3 is the same as the outer wall shape of the exhaust nail 2.

[0025] Therefore, during the installation of the exhaust nail 2, the exhaust nail 2 can be inserted into the exhaust hole 3 from the inside to the outside. At this time, under the action of the shape structure of the connecting pipe section 213, the exhaust nail 2 is restricted from continuing to slide outward, thereby realizing the exhaust nail 2 being clamped and fixed from the inside to the outside. No other fasteners are required, and the exhaust nail 2 is automatically installed and fixed. Moreover, the greater the internal pressure, the tighter the exhaust nail 2 is clamped, thereby realizing rapid assembly and rapid application of the mold.

[0026] like Figure 3 , Figure 4 As shown, the wall thickness at the position of the inner pipe section 211 is smaller than the wall thickness at the position of the outer pipe section 212, and the wall thickness of the connecting pipe section 213 is gradually increased from the inside to the outside.

[0027] When the exhaust nail 2 is working, the pressure at the connecting airway 233 is the greatest. Therefore, the wall thickness of the connecting pipe section 213 is set to gradually increase, which can cope with the pressure, avoid stress concentration, ensure stable gas discharge, and extend the service life of the exhaust nail 2.

[0028] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A tire production mold without hair, characterized in that: The invention comprises a mould body (1) and an exhaust pin (2); the mould body (1) is arranged in a circular ring shape and is evenly penetrated with a plurality of exhaust holes (3); the exhaust pin (2) is embedded in each exhaust hole (3); the exhaust pin (2) comprises a pin tube (21) and a sealing head (22); an exhaust channel (23) is formed through the exhaust pin (2); the sealing head (22) is in the shape of a loofah and is located at the entrance of the exhaust channel (23).

2. A tire production mold without hair according to claim 1, characterized in that: The exhaust channel (23) comprises an inner air channel (231), an outer air channel (232) and a connecting air channel (233); the inner air channel (231) and the outer air channel (232) respectively penetrate the inner wall and the outer wall of the mold body (1); the aperture of the inner air channel (231) is larger than the aperture of the outer air channel (232); the connecting air channel (233) is arranged between the inner air channel (231) and the outer air channel (232) in a constricted shape from the inside to the outside.

3. A tire production mold without hair according to claim 2, characterized in that: The nail tube (21) comprises an inner tube section (211), an outer tube section (212) and a connecting tube section (213) corresponding to the inner airway (231), the outer airway (232) and the connecting airway (233); the outer diameter of the inner tube section (211) is larger than the outer diameter of the outer tube section (212); the connecting tube section (213) is arranged between the inner tube section (211) and the outer tube section (212) in a constricted shape from the inside to the outside; the inner wall shape of the exhaust hole (3) is the same as the outer wall shape of the exhaust nail (2).

4. A tire production mold without hair as claimed in claim 3, characterized in that: The wall thickness at the position of the inner pipe section (211) is smaller than the wall thickness at the position of the outer pipe section (212), and the wall thickness of the connecting pipe section (213) is gradually increased from the inside to the outside.

5. The mold for producing a tire without hair as claimed in claim 1, characterized in that: The mold body (1) comprises a plurality of templates (11) and forming core blocks (12); the templates (11) are arranged in an arc shape and connected end to end to form a circular ring; and the forming core blocks (12) are arranged on the inner wall of the template (11).

6. The mold for producing a hairless tire according to claim 5, characterized in that: The forming core block (12) comprises four forming edges (13) and a plurality of forming plates (14); the four forming edges (13) are arranged at intervals on the inner wall of the template (11) and extend along the arc direction thereof; and the forming plates (14) are arranged on both sides of the two forming edges (13) at the two sides.

7. The mold for producing a hairless tire according to claim 6, characterized in that: The two sides of the two shaped edges (13) on the farthest sides, which are away from each other, and the sides of the two innermost shaped edges (13) on the nearer sides, are both vertically and spaced apart with clips (15).

8. The mold for producing a hairless tire according to claim 6, characterized in that: The forming plates (14) on both sides of each outermost forming edge (13) are arranged in a staggered manner.

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