Post-inflation shaping device for tire vulcanization

Abstract

The utility model provides a post-inflation shaping device for tire vulcanization, which comprises a post-inflation shaping ring matched with a bead part of a tire, so that a closed cavity is formed by the post-inflation shaping ring and an inner cavity of the tire; the outer side surface of the outer ring part of the post-inflation shaping ring is matched with the outline of the bead part of the tire; the outer side surface of the outer ring part comprises a first matching part and a second matching part, a groove is formed in a mutual connection area of the first matching part and the second matching part, the groove is used for receiving rough glue at a bead part of a tire, and the first matching part and the second matching part are respectively matched with the outline of the bead part of the tire. According to the technical scheme, the post-inflation shaping device for tire vulcanization can be provided, and the situation that the appearance quality of a tire is affected due to the fact that extrusion marks are left on the bead of the tire due to extrusion deformation of raw rubber is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tire vulcanization devices, and in particular to a post-inflation shaping device for tire vulcanization. By arranging grooves on the post-inflation shaping device for tire vulcanization, the rough rubber at the tire lip portion will not be squeezed and leave marks on the tire when post-inflation shaping is performed after the tire is vulcanized, which is beneficial to the post-process operation and improves the appearance quality of the tire. Background Art

[0002] There are many processes involved in the tire manufacturing process, among which there is a post-inflation process after the tire vulcanization process and before the maintenance process, which is usually called inflation or post-inflation, commonly known as PI in the industry. Since the skeleton material of the tire is mainly composite fibers such as nylon and polyester, after the vulcanization process, the skeleton material of the tire will have a certain stretch from the raw tire to the finished tire, and the skeleton material of the tire will shrink by heat, etc. Therefore, after the tire is vulcanized, PI can effectively avoid disordered deformation or disordered changes in the skeleton material of the tire, thereby stabilizing the tire size while ensuring the performance of the tire.

[0003] The current PI action usually involves matching the tire bead with the PI ring of the PI device, and then completing the tire PI under a certain time and pressure. Since the tire bead of the tire mold is usually provided with exhaust holes to increase the exhaust effect, there will be residual rubber in the tire bead after the tire is vulcanized; when the tire is vulcanized and PI is performed, the rubber in the tire bead is squeezed by the PI ring and will leave squeeze marks in the tire bead area, thus affecting the appearance quality of the finished tire; at the same time, some of the squeezed rubber may not completely return to its original state after the PI action is completed, and some of the rubber is still attached to the tire bead, thus affecting the subsequent tire inspection and maintenance process. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a post-inflation shaping device for tire vulcanization to prevent the rough rubber from leaving extrusion marks on the tire lip due to extrusion deformation, thereby affecting the appearance quality of the tire.

[0005] In order to solve the above technical problems, the utility model provides a post-inflation shaping device for tire vulcanization, comprising a post-inflation shaping ring, the post-inflation shaping ring cooperates with the tire bead portion so that the post-inflation shaping ring and the inner mold cavity of the tire form a closed cavity, the post-inflation shaping ring has an outer ring portion, and the outer side surface of the outer ring portion matches the contour of the tire bead portion;

[0006] The outer surface of the outer ring portion includes a first matching portion and a second matching portion, and a groove is arranged in the mutually connecting area of ​​the first matching portion and the second matching portion. The groove is used to receive the rough rubber of the tire bead portion, and the first matching portion and the second matching portion respectively match the contour of the tire bead portion.

[0007] In a more preferred embodiment, the groove width of the groove is greater than or equal to the length of the rough rubber at the bead portion of the tire.

[0008] In a more preferred embodiment, the groove width of the groove is greater than or equal to twice the length of the rough rubber at the bead portion of the tire.

[0009] In a more preferred embodiment, the depth of the groove is greater than or equal to the length of the rough rubber at the bead portion of the tire.

[0010] In a more preferred embodiment, the number and position of the grooves match the number and position of the rubber at the bead portion of the tire.

[0011] In a more preferred embodiment, the groove penetrates along the outer ring portion in the circumferential direction to form a groove ring.

[0012] In a more preferred embodiment, the first matching portion matches with the bottom of the tire bead portion, and the second matching portion matches with the side of the tire bead portion.

[0013] In a more preferred embodiment, two post-inflation shaping rings are included, and the two post-inflation shaping rings are respectively connected to two bead areas of the tire to form the closed cavity.

[0014] In a more preferred embodiment, the post-inflation shaping ring includes a lower side portion, and the lower side portion is connected to the lifting component of the post-inflation shaping device.

[0015] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0016] The post-inflation shaping ring provided in this case is provided with a groove. When the tire is subjected to PI after vulcanization, the rubber on the tire lip can enter the groove. In this way, the groove becomes an escape ring for the rubber on the tire lip and does not squeeze the rubber. In this way, no mark will be left on the tire lip after PI, ensuring the appearance quality of the tire; at the same time, the rubber on the tire lip remains in the original state after the tire is vulcanized, and the inspection and maintenance work of the subsequent process can be carried out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view structural schematic diagram of half of the rear inflation shaping ring of the utility model;

[0018] Figure 2It is a cross-sectional structural schematic diagram of half of the rear inflation shaping ring of the utility model;

[0019] Figure 3 for Figure 2 A partially enlarged schematic diagram of the cross-sectional structure. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Figure 1-Figure 2 The schematic diagram of the top view of half of the rear inflation shaping ring of the rear inflation shaping device of the utility model is shown. The rear inflation shaping ring R is a circular ring structure, having an inner ring portion 1 and an outer ring portion 2. The rear inflation shaping ring R also has an upper side portion 3 and a lower side portion 4; the lower side portion 4 of the rear inflation shaping ring R is connected to the lifting component of the rear inflation shaping device (not shown in this embodiment) and is fixedly connected through the fastening portion 6 of the upper cavity portion 5 of the rear inflation shaping ring R. The contour of the outer ring portion 2 of the rear inflation shaping ring R is composed of a plurality of planes and curved surfaces, and the contour composed of the plurality of planes and curved surfaces matches the contour of the tire bead portion T. Since the tire has two bead portions, the rear inflation shaping ring R is also arranged in pairs, respectively consisting of an upper rear inflation shaping ring and a lower rear inflation shaping ring. When the vulcanized tire enters the post-inflation and shaping process, the upper bead portion of the tire cooperates with the outer ring portion 2 of the upper post-inflation shaping ring R, and the lower bead portion of the tire cooperates with the outer ring portion 2 of the lower post-inflation shaping ring R. The outer surface of the outer ring portion 2 of the post-inflation shaping ring matches the contour of the bead portion T of the tire. At this time, the outer ring portion 2 of the post-inflation shaping ring R and the inner mold cavity of the tire form a closed cavity; then the tire post-inflation and shaping process is completed under a certain time and pressure; then the tire enters the subsequent maintenance process.

[0022] Figure 3 for Figure 2 A partial enlarged schematic diagram of the cross-sectional structure of the rear inflation shaping ring R is shown; an enlarged schematic diagram of the outer ring portion 2 of the rear inflation shaping ring R is shown. Figure 1-Figure 2 The post-inflation shaping ring R has an outer ring portion 2, and the outer surface of the outer ring portion 2 has a first matching portion 7 and a second matching portion 8, the first matching portion 7 matches with the tire bead bottom T1 of the tire bead portion T, and the second matching portion 8 matches with the tire bead side portion T2 of the tire bead portion T. Figure 3As shown, the bold dotted line portion in the figure is the tire bead portion T and the outer ring portion 2 of the post-inflation shaping ring R. A groove 9 is provided in the mutually connected area between the first matching portion 7 and the second matching portion 8 of the outer ring portion 2; when the tire is post-inflated and shaped after vulcanization, the rough rubber T3 of the tire bead portion T can enter the groove 9, so as to prevent the rough rubber T3 from being squeezed and falling onto the surface of the first matching portion 7 or the second matching portion 8 and leaving marks on the tire bead portion T, thereby ensuring the appearance quality of the tire bead portion T.

[0023] In order to allow the groove 9 to provide sufficient avoidance space for the rubber T3 in the bead area T of the tire, the groove width W of the groove 9 is at least greater than the length L of the rubber T3 in the bead area T of the tire. The groove width W shown here refers to the distance between the narrowest parts of the groove opening. In this way, when the tire is post-inflated and finalized after vulcanization, the rubber T3 in the bead area T of the tire will not be squeezed to the first matching part 7 or the second matching part 8 and leave extrusion marks on the surface of the bead area T of the tire. Furthermore, if the root of the rubber T3 in the bead area T of the tire is taken as the center of the circle, the rubber T3 is located in the middle area of ​​the opening of the groove 9, and a virtual circle is made with the length L of the rubber T3 as the radius, as shown in FIG. Figure 3 As shown by the thin dotted line, the opening width W of the groove 9 is greater than or equal to the length L of the rubber T3 in the tire bead area T, that is, W≥L; further, the opening width W of the groove 9 is greater than or equal to twice the length L of the rubber T3 in the tire bead area, that is, W≥2L. Similarly, the depth h of the groove 9 is at least greater than the length L of the rubber T3 in the tire bead area, that is, h≥L. With such a configuration, when the tire is post-inflated and shaped, when the tire bead area T cooperates with the outer ring portion 2 of the post-inflation shaping ring R, the groove 9 of the outer ring portion 2 can provide sufficient avoidance space for the rubber T3 in the tire bead area T, thereby preventing the rubber T3 from being deformed by extrusion and leaving extrusion marks in the tire bead area T, thereby affecting the appearance quality of the tire; at the same time, it also prevents the rubber T3 from being pressed against the tire bead area T due to extrusion, thereby affecting the smooth progress of the subsequent maintenance process.

[0024] The grooves 9 provided on the outer ring portion 2 of the rear inflation shaping ring R can be provided accordingly according to the number of rubbers T3 in the tire bead portion T. For example, when the number of rubbers in the tire bead portion T is M, the number of grooves 9 provided on the outer ring portion 2 of the rear inflation shaping ring R is also provided accordingly to M; that is, the number and position of the grooves 9 match the number and position of rubbers T3 in the tire bead portion T. More optimally, the grooves 9 are formed along the outer ring portion 2 of the rear inflation shaping ring R in the circumferential direction to form a groove ring 9, such as Figure 1 As shown, this is beneficial to the post-inflation shaping operation of the tire, and is also convenient for the processing and installation of the post-inflation shaping ring R.

[0025] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A post-inflation shaping device for tire vulcanization, characterized in that: The rear inflation shaping ring is matched with the tire bead portion so that the rear inflation shaping ring and the inner cavity of the tire form a closed cavity, and the rear inflation shaping ring has an outer ring portion, and the outer surface of the outer ring portion matches the contour of the tire bead portion; The outer surface of the outer ring portion includes a first matching portion and a second matching portion, and a groove is arranged in the mutually connecting area of ​​the first matching portion and the second matching portion. The groove is used to receive the rough rubber of the tire bead portion, and the first matching portion and the second matching portion respectively match the contour of the tire bead portion.

2. A post-inflation shaping device for tire vulcanization according to claim 1, characterized in that: The groove width of the groove is greater than or equal to the length of the rough rubber at the tire bead.

3. A post-inflation shaping device for tire vulcanization as claimed in claim 2, characterized in that: The groove width of the groove is greater than or equal to twice the length of the rough rubber at the tire lip.

4. A post-inflation shaping device for tire vulcanization as claimed in claim 1, 2 or 3, characterized in that: The depth of the groove is greater than or equal to the length of the rough rubber at the bead of the tire.

5. A post-inflation shaping device for tire vulcanization according to claim 1, characterized in that: The number and position of the grooves match the number and position of the rubber on the tire bead.

6. A post-inflation shaping device for tire vulcanization according to claim 1, characterized in that: The groove penetrates along the outer ring portion in a circumferential direction to form a groove ring.

7. A post-inflation shaping device for tire vulcanization according to claim 1, characterized in that: The first matching portion matches with the bottom of the tire bead portion, and the second matching portion matches with the side of the tire bead portion.

8. A post-inflation shaping device for tire vulcanization according to claim 1, characterized in that: It comprises two post-inflation shaping rings, which are respectively connected to two bead parts of the tire to form the closed cavity.

9. A post-inflation shaping device for tire vulcanization according to claim 1, characterized in that: The post-inflation shaping ring comprises a lower side portion, and the lower side portion is connected to the lifting component of the post-inflation shaping device.

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