CN215551091U - Novel turn-up bladder for tire side molding in tire molding process and tire molding machine - Google Patents
Novel turn-up bladder for tire side molding in tire molding process and tire molding machine Download PDFInfo
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- CN215551091U CN215551091U CN202120625203.5U CN202120625203U CN215551091U CN 215551091 U CN215551091 U CN 215551091U CN 202120625203 U CN202120625203 U CN 202120625203U CN 215551091 U CN215551091 U CN 215551091U
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Abstract
The application relates to the field of tire manufacturing, in particular to a novel turn-up bladder for tire side molding in a tire molding process and a tire molding machine. The reverse-wrapping capsule comprises a capsule body and sub-ports arranged at two sides of the capsule body; the capsule body comprises a first capsule thickness area and a second capsule thickness area, the first capsule thickness area is used for attaching the side wall rubber, the starting point is located at the position of a B point of the side wall rubber, the ending point is at least located at the position of an A point of the side wall rubber, and the second capsule thickness area extends to the position of the B point of the side wall rubber from a right side seam; the thickness of the second capsule thickness zone is h2The thinnest position of the first capsule thickness area is positioned at the position of A point of the rubber material on the side wall, and the thickness is h1，h1=0.5‑0.7 h2The thickness of the first capsule increases gradually or gradiently from the point A to the point B2. The defect such as the inside fold of tire and bubble that the shape is bad and cause because of the bladder inflation has been avoided to this application.
Description
Technical Field
The application relates to the field of tire manufacturing, in particular to a novel turn-up bladder for tire side molding in a tire molding process and a tire molding machine.
Background
In the tire production process, the role of the molding process is to assemble the rubber-processed semifinished products together into the general shape of the tire by the tire building machine according to strict design and process requirements. After the forming is finished, the internal structure and the material distribution of the tire are basically determined, and finally, the tire blank is formed into the tire with the service function through a vulcanization process.
The patent relates to a process for attaching a tire side component to a tire in a forming link according to process requirements.
The sidewall components appear on the surface of the forming drum in a flat state during forming, and the forming process enables the planar sidewall to be cylindrical in a specific working position) to be attached into a circular ring in a state (i) in fig. 1) and then conveyed to a main drum in another working position). The rubber bag is expanded into a balloon shape, the position of the sidewall close to the outside is supported as shown in the state II) in the figure 1), and the rubber bag is sequentially close to the sidewall of the shaped tire blank body in a progressive mode, so that the shaped and rolled sidewall is formed as shown in the state III in the figure 1). This process is referred to as sidewall turnup of the tire during the tire manufacturing process. The decisive means for the capsule drum former is the turning up of the capsule in the former.
The turnup bladders function to support the sidewall during the turnup of the shaped sidewall, and the shape of the sidewall changes during this process as shown in fig. 1.
State 1, initial state: the tire side is flatly laid on the forming drum, and the circumferences of the tire side are butted to form a cylinder shape;
state 2, support state: the fixed diameter of one side of the tire wall is unchanged) and the diameter of the other side is increased, so that the rubber bag is supported by the rubber bag and slowly spreads to the circumference. At the moment, the whole tire side is in a horn shape,
and 3, completing turn-up fitting: finally, the tire is supported to the highest state, namely the whole tire side is changed from a cylindrical shape to a circular ring shape), and the tire is uniformly adhered to two sides of the tire to reach the actual positioning position of the tire side.
The tire side mainly depends on the assistance of the capsule action in the process of completing the actions. The specific requirements in this process are: the shape of the sidewalls requires that the ab segment length be within a controllable range. This is a specific requirement in the tire building production and also an important factor affecting the quality of the tire production.
At present, in the tire production, a lot of unqualified products are caused by poor turn-up of the sidewall, the key point for realizing the turn-up action is the uniform coordination of the action of each point of the sidewall part, and the auxiliary tool which can achieve the optimal scheme of the turn-up action at present is a turn-up capsule of a forming machine. And because each manufacturer has different design modes for the capsules, the turn-up process of the side wall of different manufacturers during molding is different. The technical disadvantages of the currently used capsule in the forming department are listed as follows:
1. When the bladder is inflated to support the sidewall part and the sidewall shape reaches the state II shown in figure 1), the component force F of the tension F on the sidewall axis is increased due to the increase of the alpha angle1With a consequent increase in F1When the friction force between the bladder and the surface of the sidewall is larger than the friction force between the bladder and the surface of the sidewall, the contact surface of the sidewall and the bladder slides relatively, and finally the width of the A section in the figure 1) after the sidewall is turned up cannot meet the design requirement, namely the design size of the sidewall position of the tire cannot be attached to the designed established position as required, thereby affecting the performance of the tire.
2. In the process of manufacturing the molded capsule used in the industry at present, the manufacturing process with uniform thickness in the whole body is adopted for stable performance and long service cycle. The disadvantages of this approach are: when the capsule is inflated at no load, the inflated shape can maintain the ideal spherical shape. When the rubber bag is used on a forming machine, the side wall covers one end of the rubber bag, the side wall is a rubber part, and long-chain polymers in the rubber material are entangled to generate deformation-resistant stress in the rubber part. The disadvantages caused by this phenomenon:
1) The molding capsule needs to be inflated excessively to support the tire side;
2) the side wall is easy to slide with the surface of the capsule in the process of irregular deformation of the capsule, so that the positioning size of the side wall part is influenced;
disclosure of Invention
In order to solve the above technical problems, an object of the present application is to provide a novel turn-up bladder for sidewall formation in a tire forming process. The defects of wrinkles, air bubbles and the like in the tire caused by the poor inflation shape of the bladder are avoided; furthermore, the method also solves the defect of the reverse wrapping action of the capsule forming machine in the tire production process; the design size of the tire is perfectly realized after molding, and the design performance of the tire product is perfectly realized while the qualification rate of the tire is improved.
In order to achieve the above object, the present application adopts the following technical solutions:
a novel turn-up capsule for tyre side molding in a tyre molding procedure comprises a capsule body and sub-openings arranged at two sides of the capsule body; the rubber bag body is characterized by comprising a first rubber bag thickness area and a second rubber bag thickness area, wherein the first rubber bag thickness area is used for attaching a side wall rubber material, the starting point is located at the position of a B point of the side wall rubber material, the end point is at least located at the position of an A point of the side wall rubber material, and the second rubber bag thickness area extends to the position of the B point of the side wall rubber material from a right side seam allowance; the thickness of the second capsule thickness zone is h 2The thinnest position of the first capsule thickness area is positioned at the position of A point of the rubber material on the side wall, and the thickness is h1，h1＝0.5-0.7h2The thickness of the first capsule increases gradually or gradiently from the point A to the point B2。
As a further improvement, the terminal point of the first capsule thickness area is positioned at the outer side of the abrasion-resistant rubber at the tire bead opening beyond the position of the alpha point of the rubber material at the tire side wall, and the capsule body is positioned at the tire beadThe thickness of the wear-resistant rubber part is reversed by h1Gradually or gradiently increasing to h2。
As a further improvement, the first capsule thickness area is from the position of A point to the position of B point, one side surface is uniformly provided with tooth-shaped step-shaped stripes, and the other side surface is uniformly provided with round holes.
As a further improvement, h2Is 8-15mm, h1Is 5-10 mm. More preferably, h2Is 8-10mm, h1Is 5-7 mm.
Further, this application still discloses a tire building machine, including building-up drum, profile modeling profile locking piece, turn over a capsule and boosting capsule, the both sides bead of turning over a capsule is fixed respectively and is set up on the building-up drum, profile modeling profile locking piece sets up in tire bead position below, and the boosting capsule sets up in one side of turning over a capsule, its characterized in that, turns over a capsule adoption novel turn over a capsule.
As a further improvement, the profile modeling profile locking block is arranged on the outer side of the forming drum, the outer ring of the profile modeling profile locking block is provided with a groove, the radial section of the groove comprises a first bevel edge, an inclined bottom edge and a second bevel edge, the first bevel edge is positioned on the inner side of the tire bead, the second bevel edge is positioned on the outer side of the tire bead, and the first bevel edge and the second bevel edge are connected with the inclined bottom edge; the inclined bottom edge forms an included angle alpha with the horizontal axis, and the relationship between the included angle alpha and the included angle alpha' of the position of the seam allowance of the produced tire product is as follows: α "- α ═ 4 to 15 °; the length of the inclined bottom edge is L, and the relation with the lower plane L' of the toe opening of the tire is as follows: l: l ″, 1.05 to 1.2.
As a further improvement, the alpha is 14-18 degrees, the horizontal included angle of the first bevel edge is 45-60 degrees, and the horizontal included angle of the second bevel edge is 55-65 degrees; preferably, alpha is 15-17 degrees, the horizontal included angle of the first bevel edge is 50-55 degrees, and the horizontal included angle of the second bevel edge is 58-62 degrees.
As a further improvement, the radial section of the groove comprises a third bevel edge, the third bevel edge is connected with the second bevel edge and is in arc transition with the second bevel edge, the horizontal included angle of the third bevel edge is 15-20 degrees, and preferably, the horizontal included angle of the third bevel edge is 16-18 degrees.
The shape of the groove on the section of the locking block is closer to the shape of a tire bead of a finished tire product, namely the shape of the section of the tire bead part of a tire blank is similar to that of a vulcanization mold, and the whole body of the locking block is of a rigid metal structure and cannot deform due to large supporting force of the locking block. The thickness of the locking block capsule at the groove of the locking block determines that the capsule part (the rubber component of the locking block capsule) can be extruded and deformed after the locking block is pushed up, so that the tire bead shape of the tire made of the locking block or the locking block mechanism in the traditional form can naturally form an oval cross section shape because a steel wire ring framework exists in the tire bead. The working principle of the profile modeling outline locking block is that the shape of the tire bead in the molding process is forced to be consistent with that of a finished tire by means of self rigid materials. In the vulcanization process, the tire bead part of the tire blank already has the shape of a finished tire bead, so that the phenomenon that the rubber material flows in a large range after being heated and pressed in the vulcanization process is avoided, the theoretical parameters of all parts in the tire design process are better ensured, and the quality stability of the tire is improved.
By adopting the technical scheme, the novel bladder profile with different thicknesses in the bladder profile design is adopted, so that the defects of wrinkles, bubbles and the like in the tire caused by the bad inflated shape of the bladder are avoided when the bladder is inflated by the traditional bladder forming machine; the mode of combining the reverse stepped surface with the cylindrical raised surface is added during the design of the surface of the bladder, the defect of the anti-package action of a bladder forming machine in the production process of the tire is perfectly solved, the design size of the tire is perfectly realized after forming, the qualification rate of the tire is improved, and the design performance of a tire product is perfectly realized
Drawings
Fig. 1 is a schematic diagram of a sidewall turn-up operation process in the present application.
Fig. 2 is a schematic diagram of the working mode of the present application.
Fig. 3 and 4 are schematic views of the surface development structure of the turn-up capsule of the present application.
Fig. 5 is a schematic structural view of a contoured lock block.
Fig. 6 is a schematic structural view of the contoured lock piece and the tire during molding.
Detailed Description
The following detailed description of embodiments of the present application refers to the accompanying drawings.
As shown in fig. 2, a tire building machine comprises a building drum 3, a profile modeling contour locking block 8, a turn-up bladder and a boosting bladder 2, wherein the sub-ports on the two sides of the turn-up bladder are respectively and fixedly arranged on the building drum 3, the profile modeling contour locking block 8 is arranged below the position of the sub-port of a tire, and the boosting bladder 2 is arranged on one side of the turn-up bladder; the reverse-wrapping capsule comprises a capsule body 1 and sub-openings arranged at two sides of the capsule body 1; the capsule body 1 comprises a first capsule thickness area 11 and a second capsule thickness area 12, wherein the first capsule thickness area 11 is used for attaching the side wall rubber 4, the starting point is located at the position of a side wall rubber 4B point, the ending point is at least located at the position of a side wall rubber 4A point, and the second capsule thickness area 12 extends from a right side seam allowance to the position of the side wall rubber 4B point; the second capsule thickness zone 12 has a thickness h 2The thinnest portion of the first bladder thickness zone 11 is located at the 4 alpha position of the sidewall gum material and has a thickness h1，h1＝0.5-0.7h2The first zone of capsule thickness 11 increases in thickness gradually or gradiently from the point of a to the point of B to a point of h2. Of course, in the application, the terminal point of the first capsule thickness area 11 is beyond the position of 4 alpha point of the side rubber material to be stopped at the outer side of the wear-resistant rubber of the tire bead, and the capsule body 1 is reversely formed by h in the thickness of the wear-resistant rubber part of the tire bead1Gradually or gradiently increasing to h2. As a specific example, h of the present application2Is 8mm, h1Is 5 mm. As shown in fig. 3 and 4, the first capsule thickness zone 11 has tooth-shaped stepped stripes (6) uniformly formed on one surface and circular holes 7 uniformly formed on the other surface from the a point position to the B point position.
As shown in fig. 5 and 6, the contoured lock piece 8 is annular, the contoured lock piece 8 is arranged on the outer side of the forming drum 3, the outer ring of the contoured lock piece 8 is provided with a groove, the radial section of the groove comprises a first oblique edge 82, an inclined bottom edge 81 and a second oblique edge 83, the first oblique edge 82 is positioned on the inner side of the tire bead, the second oblique edge 83 is positioned on the outer side of the tire bead, and the first oblique edge 82 and the second oblique edge 83 are connected with the inclined bottom edge 81; the inclined bottom edge 81 and a horizontal axis form an included angle alpha, and the included angle alpha' of the position of the seam allowance of the produced tire product are in the following relation: α "- α ═ 4 to 15 °; the length of inclined bottom edge 81 is L, in relation to the plane L "below the toe opening of the tire: l: l ″, 1.05 to 1.2. As a specific example, α is 16 °, the first oblique side 82 is horizontally angled at 52 °, and the second oblique side 83 is horizontally angled at 60 °. Of course, in the present application, the radial cross section of the groove includes a third oblique edge 84, the third oblique edge 84 connects with the second oblique edge 83, and is in arc transition with the second oblique edge 83, and the horizontal included angle of the third oblique edge 84 is 17 °.
The utility model provides a sidewall shaping method in tire shaping process, this method designs sidewall shaping rubber capsule body 1 and includes first capsule thickness district 11 and second capsule thickness district 12, and first capsule thickness district 11 is used for attached side wall sizing material 4, controls first capsule thickness district 11 tension + sidewall rubber part tension when the side wall shaping 12 tensions in second capsule thickness district to make capsule body 1 when aerifing and prop up the side wall, the dynamic expansion process of capsule body 1 self keeps spherical state throughout.
Due to the adoption of the technical scheme, the method has the following characteristics:
1. designing the contour with unequal thickness:
since the sidewalls of the rubber member have viscoelasticity, the rubber member and the bladder should be regarded as a whole before the bladder is inflated, and when inflation deformation starts, the first bladder thickness region 11 of the bladder expands preferentially due to the reduced size as shown in fig. 2, and when the sidewalls are supported, the sidewalls are the rubber member, and the elasticity of the bladder is added to the elasticity of the sidewalls, so that the superposition of the binding force is generated, and the expansion process is slowed down. After the second capsule thickness zone 12 begins to expand, the tension of the second capsule thickness zone 12 becomes large, so that the zone I begins to expand again synchronously with the second capsule thickness zone 12, and the expansion section of the whole capsule forms a perfect spherical contour.
In the design of the capsule, the material of the first capsule thickness area 11 is thinned while the strength of the material is ensured, and the capsule is manufactured according to the normal preparation process of the capsule, so that the unequal thickness profile design expected in the text is achieved.
2. Surface design:
the working surface of the bladder, which is primarily the portion of the bladder in contact with the tire sidewall component during the molding operation, is divided into two regions, as shown in FIG. 2: the first bladder thickness zone 11 is the initial end of the bladder contacting the sidewall when it is supported, and the surface is designed in the form of a combination of a reverse step and a rounded convex surface (see fig. 3 and 4), so that the bladder can better restrain the sidewall part when it is expanded on the forming machine. The sidewall component is made to maintain its shape during the action as shown in fig. 1, thereby ensuring the design dimensions of important components in the tire.
3. The profile modeling contour locking block has metal rigidity, as shown in fig. 5 and 6, the profile modeling contour locking block and the bead ring can restrain the rubber material component and extrude together under the action of thrust, so that the tire blank forms a steel ring shape which is the same as the shape of the locking block groove. The rubber material is prevented from flowing in a larger range when heated and pressed in the vulcanization process, the theoretical parameters of all parts in the design of the tire are better ensured, and the quality stability of the tire is improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present disclosure, including any person skilled in the art, having the benefit of the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A novel turn-up capsule for tyre side molding in a tyre molding procedure comprises a capsule body (1) and sub-openings arranged at two sides of the capsule body (1); the rubber bag body (1) is characterized by comprising a first rubber bag thickness area (11) and a second rubber bag thickness area (12), wherein the first rubber bag thickness area (11) is used for attaching the side wall rubber (4), the starting point is located at the position of B point of the side wall rubber (4), the ending point is located at least at the position of A point of the side wall rubber (4), and the second rubber bag thickness area (12) extends from a right side seam allowance to the position of B point of the side wall rubber (4); the second capsule thickness region (12) has a thickness h 2The thinnest point of the first bladder thickness zone (11) is located at the A point position of the side wall rubber compound (4) and the thickness is h1，h1＝0.5-0.7h2The first zone of capsule thickness (11) increases gradually or gradiently in thickness from the point of A to the point of B to a point of h2。
2. The novel turn-up bladder for sidewall formation in a tire building process according to claim 1, wherein the end point of the first bladder thickness region (11) exceeds the A point of the sidewall rubber (4) and ends outside the tire bead abrasion-resistant rubber, and the bladder body (1) is formed by the thickness h in the tire bead abrasion-resistant rubber part1Gradually or gradiently increasing to h2。
3. The novel turn-up bladder for sidewall formation in a tire building process according to claim 1, wherein the first bladder thickness zone (11) is uniformly provided with the toothed stepped stripes (6) on one side surface and the round holes (7) on the other side surface from the A point position to the B point position.
4. The novel turn-up bladder for sidewall formation in a tire building process as claimed in claim 1, wherein h is2Is 8-15mm, h1Is 5-10 mm.
5. The novel turn-up bladder for sidewall formation in a tire building process as claimed in claim 1, wherein h is2Is 8-10mm, h1Is 5-7 mm.
6. A tyre building machine, comprising a building drum (3), a profile modeling outline locking block (8), a turn-up bladder and a boosting bladder (2), wherein the two side seam allowances of the turn-up bladder are respectively fixedly arranged on the building drum (3), the profile modeling outline locking block (8) is arranged below the position of the tire seam allowances, and the boosting bladder (2) is arranged at one side of the turn-up bladder, characterized in that the turn-up bladder adopts the novel turn-up bladder of any one of claims 1-5.
7. Tyre building machine according to claim 6, characterised in that the contoured lock block (8) is arranged outside the building drum (3), the outer ring of the contoured lock block (8) being provided with a groove, the radial section of which comprises a first bevelled edge (82), a sloping base (81) and a second bevelled edge (83), the first bevelled edge (82) being located inside the mouth of the tyre, the second bevelled edge (83) being located outside the mouth of the tyre, the first bevelled edge (82) and the second bevelled edge (83) being connected to the sloping base (81); the inclined bottom edge (81) forms an included angle alpha with a horizontal axis, and the included angle alpha' of the position of the seam allowance of the produced tire product are in the following relation: α "- α ═ 4 to 15 °; the length of the inclined bottom edge (81) is L, and the relation with the lower plane L' of the toe opening of the tire is as follows: l: l ″, 1.05 to 1.2.
8. Tyre building machine according to claim 6, characterised in that α is 14-18 °, in that the first inclined edge (82) has a horizontal angle of 45-60 ° and in that the second inclined edge (83) has a horizontal angle of 55-65 °.
9. Tyre building machine according to claim 8, wherein α is 15-17 °, the first inclined edge (82) has a horizontal angle of 50-55 ° and the second inclined edge (83) has a horizontal angle of 58-62 °.
10. Tyre building machine according to claim 6, wherein the radial section of the groove comprises a third oblique edge (84), the third oblique edge (84) connecting the second oblique edge (83) and being in circular arc transition with the second oblique edge (83), the third oblique edge (84) being horizontally angled by 15-20 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120625203.5U CN215551091U (en) | 2021-03-29 | 2021-03-29 | Novel turn-up bladder for tire side molding in tire molding process and tire molding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120625203.5U CN215551091U (en) | 2021-03-29 | 2021-03-29 | Novel turn-up bladder for tire side molding in tire molding process and tire molding machine |
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| CN215551091U true CN215551091U (en) | 2022-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113103635A (en) * | 2021-03-29 | 2021-07-13 | 中策橡胶集团有限公司 | Novel turn-up bladder for tire side molding in tire molding process, molding machine and molding method |
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2021
- 2021-03-29 CN CN202120625203.5U patent/CN215551091U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113103635A (en) * | 2021-03-29 | 2021-07-13 | 中策橡胶集团有限公司 | Novel turn-up bladder for tire side molding in tire molding process, molding machine and molding method |
| CN113103635B (en) * | 2021-03-29 | 2022-05-31 | 中策橡胶集团股份有限公司 | Turn-up bladder for sidewall molding in tire molding process, molding machine and molding method |
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| CP03 | Change of name, title or address |
Address after: 310008 No. 1, No. 1 Street, Qiantang District, Hangzhou, Zhejiang Patentee after: Zhongce Rubber Group Co.,Ltd. Address before: 310008 No.1 Baiyang street, Qiantang New District, Hangzhou City, Zhejiang Province Patentee before: ZHONGCE RUBBER GROUP Co.,Ltd. |
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