CN113478880B - Variable-amplitude corrugated winding method for crown strap - Google Patents
Variable-amplitude corrugated winding method for crown strap Download PDFInfo
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- CN113478880B CN113478880B CN202110861934.4A CN202110861934A CN113478880B CN 113478880 B CN113478880 B CN 113478880B CN 202110861934 A CN202110861934 A CN 202110861934A CN 113478880 B CN113478880 B CN 113478880B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/30—Applying the layers; Guiding or stretching the layers during application
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Abstract
The invention provides a variable-amplitude corrugated winding method of a crown strap, which is characterized in that the crown strap is spirally wound onto a belt drum or a common belt layer arranged on the belt drum in a corrugated shape in a multi-section manner through a winding head to form a crown strap, wherein a plurality of wavy crown straps positioned on the same section on the crown strap are wound and arranged in the same shape with the same wavelength and the same amplitude, and the waveforms positioned on adjacent sections are arranged in the same wavelength and the different amplitude. The lengths of the crown tapes at the first side edge position and the second side edge position in the crown tape layer wound by the method are shorter than those at the middle position, namely the crown part of the crown tape with larger prestress in the crown tape layer is longer, and the shoulder part of the crown tape with smaller prestress is shorter, so that the technical problem of uneven prestress of the crown tapes at different positions caused by vulcanization expansion of the tire is solved, and the service life of the tire is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of tire manufacturing processes, in particular to a crown strap variable amplitude ripple winding technology for a passenger radial tire and an all-steel radial tire.
Background
In the patent technology of 11/18 th 2009, purison, a pneumatic tire is described, wherein cords with different elastic moduli are respectively arranged at a crown part and a sidewall part of the tire, cords 7 with larger elastic moduli are arranged at a crown part with larger stress, and cords 6 with smaller elastic moduli are arranged at a sidewall part with smaller stress, so that irregular deformation of the tire is avoided, and uniformity of the tire is improved.
In the patent technology of ' a method for preparing an all-steel radial tire by S-shaped spiral winding of a steel wire crown strip ' S ' disclosed by Guizhou tire stock, inc. on the 9 th month 6 th 2019, a technology is described, wherein the steel wire crown strip is preformed into an S-shaped steel wire crown strip unit on a belt drum by using a winding machine, the preformed S-shaped steel wire crown strip unit is continuously and spirally wound to obtain an S-shaped steel wire crown strip with corresponding width so as to inhibit radial expansion of the tire, but the winding method belongs to uniform winding of the crown strip, and the steel wire crown strip only plays a role of binding a main working belt layer. After the tire is vulcanized and shaped, the steel wire crown strip at the tire crown and tire shoulder part can generate the problem of uneven prestress, namely the technical problem of large prestress in the middle and small prestress at the two sides.
In summary, after the tire blank is expanded by sulfur, the problem of uneven prestress can be generated in the crown strips at different positions of the tire, and then the problem of uneven stress of the crown strips at different positions can be more serious when the tire is inflated, so that the technical problem is not properly solved, and the service life of the tire can be seriously influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a variable-amplitude corrugated winding method for a crown strap, which is characterized in that the crown strap is spirally wound on a belt drum or a common belt layer arranged on the belt drum in a corrugated shape in a multi-section manner through a winding head to form a crown strap, wherein a plurality of wavy crown straps positioned on the same section on the crown strap are wound and arranged in the shape with the same wavelength and the same amplitude, and waveforms positioned on adjacent sections are arranged in the shape with the same wavelength and different amplitudes.
Preferably, the crown strap is wound in a plurality of sections from a first side position to a middle position of the crown strap corresponding to a shoulder of the tire, and the crown strap of different sections from the first side position to the middle position is wound in a shape with increasing amplitude.
Preferably, the crown tape is wound in a plurality of sections from a middle position to a second side position of the crown layer corresponding to the crown of the tire, and the crown tape of different sections from the middle position to the second side position is wound in a shape with decreasing amplitude.
Preferably, the crown strip is continuously wound in a shape in which the peaks and valleys are substantially consistent and the amplitudes are first increased and then decreased from a first side position, a middle position, to a second side position of the crown strip corresponding to the shoulder of the tire.
Preferably, the winding head winds the crown strips onto the belt drum or the ordinary belt layer with different swing amplitudes while the belt drum rotates.
Preferably, the swing amplitude of the winding head is between 0 mm and + -20 mm.
Preferably, the wavelength is wound between 5 mm and 500 mm.
Preferably, when a single layer cap ply is required to be wound, the variable amplitude corrugated cap ply on the cap ply is formed by winding one cap ply at a time, and adjacent cap ply is wound in a non-overlapping manner.
Preferably, when multiple layers of cap ply are to be wound, the variable amplitude corrugated cap ply on each cap ply is formed by one single winding of cap ply, and adjacent cap ply is wound in a non-overlapping manner.
Preferably, the crown strap may be a steel crown strap or an aramid crown strap or a nylon crown strap.
Preferably, the crown strap at the first side edge position and the second side edge position may be wound in an approximately straight shape.
In summary, the method for winding the crown strap with variable amplitude waves disclosed by the invention mainly winds the crown strap onto a belt drum or a common belt layer in a mode of segmented winding, amplitude gradual change among segments and amplitude gradual change so as to form the crown strap layer. The lengths of the crown tapes at the first side edge position and the second side edge position in the crown tape layer wound by the method are shorter than those at the middle position, namely the crown part of the crown tape with larger prestress in the crown tape layer is longer, and the shoulder part of the crown tape with smaller prestress is shorter, so that the technical problem of uneven prestress of the crown tapes at different positions caused by vulcanization expansion of the tire is solved, and the service life of the tire is greatly prolonged.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic representation of a cross-section of a tire of the present invention.
Fig. 2 is a schematic view of a belt layer of the present invention.
FIG. 3 is a partial schematic view of a crown strap of the present invention wrapped in multiple sections of variable amplitude.
Fig. 4 is a partial schematic view of a continuous winding and gradual amplitude change of a crown strap according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below are only some, but not all, embodiments of the invention. All other embodiments, based on the examples of the invention, which a person of ordinary skill in the art would achieve without inventive faculty, are within the scope of the invention.
The cap ply 200 of the present invention is a belt layer formed by spirally winding a cap ply 10 formed by coating one or more cords in the circumferential direction, so as to distinguish a common belt layer. The cap ply can better restrict the circumferential stretching deformation of the pneumatic tire, reduce the heat generation in the rolling process of the tire, reduce the occurrence of phenomena such as tire shoulder void, crown explosion and the like, and greatly prolong the service life of the tire. Compared with the traditional belt ply, the cord end of the cap ply is few and bilateral symmetry, the method in the manufacturing process is proper, and the uniformity of the tire can be greatly improved.
The technical content of the present disclosure is specifically described below, and is shown in fig. 1 to 4. In the schematic cross-sectional view of the tire 1 shown in fig. 1, the cap ply 200 is curved in the tire after the tire is vulcanized and set. Thus, the prestress generated at a, B and C at different locations of the shoulder and crown is different. Specifically, the prestress increases gradually from the shoulder to the crown, especially on a wide-base tire (i.e., a tire with a larger crown width), the slope of the curve of the cap ply 200 on the tire is larger (i.e., the bending degree of the cap ply 200 is larger), so the problem of uneven prestress generated at the cap ply strips at different positions is particularly remarkable.
To this end, as shown in fig. 3, the present invention discloses a variable amplitude corrugated winding method of a crown band, which is to lay a common belt layer 20 flat on a belt drum (not shown), and spirally wind a crown band 10 onto the common belt layer 20 in a corrugated shape in a multi-section by a winding head (not shown) to form a crown band 200, wherein a plurality of wavy crown bands 10C and 10D on the same section (e.g., N3) of the crown band 200 are wound in the same wave length and same amplitude, and the crown bands 10B and 10C on adjacent sections (e.g., N2 and N3) are wound in the same wave length and different amplitude. According to the invention, the three A, B, C crown strips 10A, 10B and 10C are wound into the shapes with the same wavelength and different amplitudes by the crown strip variable amplitude ripple winding mode. Therefore, after the tire blank is vulcanized and expanded, the crown strip 10C of the crown part with larger expansion force is longer, and the crown strip 10B of the shoulder part with relatively smaller expansion force is shorter, namely the special winding process for winding the crown strip is used for overcoming the technical problem of uneven prestress of the crown strip at different positions of the tire. It should be noted that the invention can also directly spirally wind the crown strap onto the belt drum in a corrugated shape in a multi-section way through the winding head to form the crown strap layer so as to solve the technical problem of uneven prestress of the crown strap at different positions of the tire. Specifically, the tire can be selected according to the design requirement of the blind tire.
Further, the crown strap 10 of the present invention is wound from the first side position S1 to the middle position M of the cap ply 200 corresponding to the shoulder of the tire 1 into a plurality of sections (only three sections N1 to N3 are taken as an example), and the crown straps 10A, 10B, 10C at the different sections N1, N2, N3 from the first side position S1 to the middle position M are wound into a shape with increasing amplitude. Likewise, the crown tape 10 of the present invention may be wound in a plurality of sections (only three sections N4 to N6 are taken as an example) from the middle position M to the second side position S2 of the cap ply 200 corresponding to the crown of the tire 1, and the crown tape 10E, 10F, 10G at the different sections N4, N5, N6 from the middle position M to the second side position S2 is wound in a shape with decreasing amplitude. According to the invention, the crown belts with different amplitudes are wound in different areas of the corresponding tire in a sectional winding mode, namely, the crown belts with different lengths are wound in different areas of the tire, so that the problem of uneven prestress of the crown belts at different positions is balanced, and the technical effect of prolonging the service life of the tire is further realized.
In addition, as shown in fig. 4, the crown strap 10 of the present invention may be further wound continuously from the first side position S1, the middle position M to the second side position S2 of the cap ply 200 corresponding to the shoulder of the tire 1, in such a shape that the peaks and valleys are substantially consistent and the amplitudes are increased and then decreased. That is, the crown strap increases in amplitude as it is wound from the first side position S1 to the middle position M, and decreases in amplitude as it is wound from the middle position M to the second side position S2.
It should be noted that the crown-strip variable-amplitude wave winding method (i.e., segment winding or continuous winding) according to the present invention winds the crown strip onto the belt drum or the ordinary belt layer with different swing amplitudes while the belt drum rotates. In addition, according to the applicant's repeated verification, when the swing amplitude of the winding head is between 0 mm and + -20 mm, the uniformity of the manufactured passenger radial tire and all-steel radial tire is better when the wavelength is wound between 5 mm and 500 mm.
Further, the cap ply strip of the first and second side positions of the present invention may be wound in an approximately straight shape, i.e., the cap ply is wound in a straight form to the first and second side positions on the cap ply 200 when the swing amplitude of the winding head is 0 mm; when continuously and gradually winding the crown strap is adopted, the limit mode of the sectional winding is understood, that is, each winding turn of the crown strap is a section.
Preferably, the variable-amplitude corrugated crown strap on the crown ply is formed by winding one crown strap (which can be a steel crown strap or an aramid crown strap or a nylon crown strap), when a single crown ply is required to be wound, the variable-amplitude corrugated crown strap on the crown ply is formed by winding one crown strap once, and adjacent crown straps (only 10A to 10G are taken as an example) in the crown ply are wound in a non-overlapping way; when multiple layers of cap belt layers are required to be wound, the variable-amplitude corrugated cap belt strips on each cap belt layer are formed by winding one cap belt strip at a time, and adjacent cap belt strips in each cap belt layer are wound in a non-overlapping manner, so that the uniformity of the tire is improved, and the service life of the tire is prolonged.
In summary, the method for winding the crown strap with variable amplitude waves disclosed by the invention mainly winds the crown strap onto a belt drum or a common belt layer in a mode of segmented winding, amplitude gradual change among segments and amplitude gradual change so as to form the crown strap layer. The lengths of the crown tapes at the first side edge position and the second side edge position in the crown tape layer wound by the method are shorter than those at the middle position, namely the crown part of the crown tape with larger prestress in the crown tape layer is longer, and the shoulder part of the crown tape with smaller prestress is shorter, so that the technical problem of uneven prestress of the crown tape at different positions caused by vulcanization expansion of the tire is solved, and the uniformity and the service life of the tire are greatly improved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (6)
1. A crown-strip variable-amplitude corrugated winding method is characterized in that crown-strip is spirally wound on a belt drum or a common belt layer paved on the belt drum in a corrugated shape in a multi-section mode through a winding head to form a crown-strip layer, and the method is characterized in that: the plurality of waveform crown strips positioned on the same section on the crown ply are wound and arranged into the shapes with the same wavelength and the same amplitude, and waveforms positioned on adjacent sections are arranged in the shapes with the same wavelength and different amplitudes; the winding head winds the crown strip onto the belt drum or the ordinary belt layer with different swing amplitudes while the belt drum rotates; wherein the swing amplitude of the winding head is between 0 mm and +/-20 mm, and the wavelength is wound between 5 mm and 500 mm; the crown strap is wound from a first side position to a middle position of the crown strap corresponding to the tire shoulder of the tire into a plurality of sections, and the crown strap of different sections from the first side position to the middle position is wound into a shape with gradually increased amplitude; the crown strap is wound in a plurality of sections from a middle position to a second side position of the crown strap corresponding to the crown of the tire, and the crown strap of different sections from the middle position to the second side position is wound in a shape with decreasing amplitude.
2. The crown strap variable amplitude ripple winding method of claim 1, wherein: the crown strip is continuously wound into a shape with peaks and valleys kept basically consistent and amplitudes gradually increased and then gradually decreased from a first side position, a middle position and a second side position of the crown strip corresponding to the shoulder of the tire.
3. The crown-strip variable-amplitude corrugated winding method according to any one of claims 1 to 2, characterized in that: when a single-layer cap ply is required to be wound, the variable-amplitude corrugated cap ply on the cap ply is formed by winding one cap ply at a time, and adjacent cap ply in the cap ply are wound in a non-overlapping manner.
4. The crown-strip variable-amplitude corrugated winding method according to any one of claims 1 to 2, characterized in that: when multiple layers of cap ply are required to be wound, the variable-amplitude corrugated cap ply strip on each cap ply is formed by winding one cap ply at a time, and adjacent cap ply strips in each cap ply are wound in a non-overlapping manner.
5. The crown-strip variable-amplitude corrugated winding method according to any one of claims 1 to 2, characterized in that: the crown strap is a steel crown strap or an aramid crown strap or a nylon crown strap.
6. The crown-strip variable-amplitude corrugated winding method according to any one of claims 1 to 2, characterized in that: the crown strap at the first side edge location and/or the second side edge location is wrapped in an approximately straight line shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021108413515 | 2021-07-26 | ||
| CN202110841351 | 2021-07-26 |
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| CN113478880A CN113478880A (en) | 2021-10-08 |
| CN113478880B true CN113478880B (en) | 2023-06-23 |
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| CN202110861934.4A Active CN113478880B (en) | 2021-07-26 | 2021-07-29 | Variable-amplitude corrugated winding method for crown strap |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000033806A (en) * | 1998-07-17 | 2000-02-02 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2000052711A (en) * | 1998-08-06 | 2000-02-22 | Bridgestone Corp | Pneumatic radial tire for heavy load and manufacture thereof |
| JP2003305781A (en) * | 2002-04-15 | 2003-10-28 | Yokohama Rubber Co Ltd:The | Method for controlling winding of strip material |
| JP2004161026A (en) * | 2002-11-08 | 2004-06-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2009292000A (en) * | 2008-06-04 | 2009-12-17 | Bridgestone Corp | Method of producing pneumatic tire and apparatus therefor |
| JP2010111084A (en) * | 2008-11-10 | 2010-05-20 | Bridgestone Corp | Method for manufacturing radial tire for aircraft, and radial tire for aircraft |
| JP2013169877A (en) * | 2012-02-21 | 2013-09-02 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| CN207510158U (en) * | 2017-08-23 | 2018-06-19 | 天津恒泰善驰科技有限公司 | A kind of tire |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10138670B4 (en) * | 2001-08-07 | 2005-03-10 | Continental Ag | Pneumatic vehicle tire with a belt bandage |
| JP4309339B2 (en) * | 2002-05-29 | 2009-08-05 | ソシエテ ド テクノロジー ミシュラン | Apparatus and method for attaching a strip to a rotating surface |
| JP2009196601A (en) * | 2008-02-25 | 2009-09-03 | Bridgestone Corp | Pneumatic tire |
| JP6014542B2 (en) * | 2013-04-25 | 2016-10-25 | 株式会社ブリヂストン | Aircraft tire |
| CN110202810B (en) * | 2019-06-05 | 2022-07-26 | 贵州轮胎股份有限公司 | Method for preparing all-steel radial tire by spirally winding steel wire crown band strip in S shape |
-
2021
- 2021-07-29 CN CN202110861934.4A patent/CN113478880B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000033806A (en) * | 1998-07-17 | 2000-02-02 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2000052711A (en) * | 1998-08-06 | 2000-02-22 | Bridgestone Corp | Pneumatic radial tire for heavy load and manufacture thereof |
| JP2003305781A (en) * | 2002-04-15 | 2003-10-28 | Yokohama Rubber Co Ltd:The | Method for controlling winding of strip material |
| JP2004161026A (en) * | 2002-11-08 | 2004-06-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2009292000A (en) * | 2008-06-04 | 2009-12-17 | Bridgestone Corp | Method of producing pneumatic tire and apparatus therefor |
| JP2010111084A (en) * | 2008-11-10 | 2010-05-20 | Bridgestone Corp | Method for manufacturing radial tire for aircraft, and radial tire for aircraft |
| JP2013169877A (en) * | 2012-02-21 | 2013-09-02 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| CN207510158U (en) * | 2017-08-23 | 2018-06-19 | 天津恒泰善驰科技有限公司 | A kind of tire |
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| CN113478880A (en) | 2021-10-08 |
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Effective date of registration: 20230908 Address after: No. 36 Chaohu Road, Hongze Economic Development Zone, Huai'an City, Jiangsu Province, 223113 Patentee after: Future Tire Technology (Jiangsu) Co.,Ltd. Address before: 215000 room b308, No. 388 Ruoshui Road, Suzhou Industrial Park, Suzhou area, China (Jiangsu) pilot Free Trade Zone, Suzhou, Jiangsu Patentee before: Jiangsu huanrou Tire Technology Co.,Ltd. |
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