EP4433293A1 - Verfahren zum aufbauen eines fahrzeugreifens und fahrzeugreifen - Google Patents
Verfahren zum aufbauen eines fahrzeugreifens und fahrzeugreifenInfo
- Publication number
- EP4433293A1 EP4433293A1 EP22800583.1A EP22800583A EP4433293A1 EP 4433293 A1 EP4433293 A1 EP 4433293A1 EP 22800583 A EP22800583 A EP 22800583A EP 4433293 A1 EP4433293 A1 EP 4433293A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner layer
- sections
- carcass
- side walls
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
-
- 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
- B29D30/3007—Applying the layers; Guiding or stretching the layers during application by feeding a sheet perpendicular to the drum axis and joining the ends to form an annular element
-
- 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
- B29D30/3028—Applying the layers; Guiding or stretching the layers during application by feeding a continuous band and winding it helically, i.e. the band is fed while being advanced along the drum axis, to form an annular element
-
- 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)
- B29D30/72—Side-walls
-
- 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)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D2030/0682—Inner liners
-
- 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
- B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
- B29D2030/3221—Folding over means, e.g. bladders or rigid arms
- B29D2030/3278—Folding down the ends of the tubular tyre component, e.g. the carcass, over the drum shoulders
Definitions
- the invention relates to a method for building a vehicle tire with an inner layer comprising three sections according to the preamble of claim 1 and a vehicle tire with such an inner layer according to the preamble of claim 7.
- a vehicle tire is produced in various manufacturing stages, with one of these manufacturing stages comprising the tire structure, in which the individual components are assembled to form a green tire.
- the essential components usually include a carcass, two sidewalls and a belt package, the belt package also being referred to as a belt-tread package.
- the carcass itself usually consists of an inner layer, a liner and two cores with apex.
- a green tire is built up on one or more drums, with the individual components being placed and assembled manually or automatically.
- the assembly of the individual components of the carcass, the sidewalls and the belt package is a highly complex process step, the aim of which is to produce a vehicle tire that meets today's quality requirements.
- the inner layer when building the carcass, the inner layer is either simply wound onto a drum in one revolution or wound in strips over the entire width in a spiral manner in several revolutions.
- the disadvantage is that the inner layer has a constant thickness over the entire width of the tire or, due to the spiral winding, has a constantly varying thickness.
- the cross-section of the tire has areas in which the loads are particularly high and other areas in which the loads are lower.
- loads can be, for example, loads in the production process or loads on the finished tire when used on the vehicle. are correspondingly disadvantageous current vehicle tires due to their structure and therefore have potential for improvement.
- the object of the present invention to provide a method for producing a vehicle tire, by means of which the quality of the vehicle tire is improved, in particular with regard to the increased loads in the production process. Furthermore, it is the object of the invention to provide a vehicle tire with improved quality, in particular when it is used on the vehicle.
- the object of the invention is achieved by a method for producing a vehicle tire having the features of patent claim 1 and by a vehicle tire having the features of patent claim 7.
- the object of the invention is achieved by a method for building a vehicle tire, comprising the production of a green tire, which comprises a carcass, at least two side walls and a belt package, the production of the green tire comprising at least the following steps:
- At least one laying unit preferably at least one drum, particularly preferably at least one carcass drum or a combined carcass and crowning drum,
- the inner layer comprises at least two first sections, each with a single wrap and at least one second section arranged in a spiral, in particular by a multiple wrap,
- a carcass comprising the first inner layer, at least one second layer arranged on the first and at least one core with apex, and
- the inner layer is made up of at least three sections.
- the first two sections have the property of a constant thickness with a simple wrapping.
- the second section which differs from the other two sections in that it has a spiral structure and in particular is wrapped several times, allows optimal adaptation to sensitive areas of the inner layer in which, for example, no transverse separations are permitted.
- the combination of the sections allows different sections of the inner layer to be adapted to the individual requirements across the entire width of the tire, in particular with regard to the variability of the thickness.
- the vehicle tire can be significantly improved in terms of the requirements for concentricity or the requirement for thickness constancy.
- the method according to the invention can be used to produce a vehicle tire that withstands different loads over the entire width of the vehicle tire and is therefore improved overall in terms of quality.
- the second section constructed in a spiral shape is wound up in a spiral shape with an endless strip on the laying-on unit.
- the “strip-winding” method for example, which is known in the prior art, is suitable for this.
- Both the at least two first sections and the at least one second section can have an identical composition, for example. However, it is also conceivable that the sections have different compositions in order to meet the different requirements over the entire width of the tire.
- the green tire according to the invention is vulcanized in a further step to produce a vehicle tire.
- a vulcanization process is known from the prior art.
- the application unit according to the invention can preferably be a drum.
- a carcass drum or a combined carcass and crowning drum, on which the individual layers are placed, is particularly preferably used.
- the combined carcass and crowning drum is also referred to as a winding and crowning drum.
- the carcass is built up automatically on such a drum.
- the construction of the carcass according to the invention usually takes place by placing the first inner layer on the laying unit, then placing a second layer, which for example comprises a textile insert, and joining the layered construction with usually two cores with apex.
- Such a carcass is assembled with at least two sidewalls either subsequently or during the prior assembly.
- the green tire can be built up by expanding the placement unit and optionally by working up the outer areas in the area of the shoulder to form the sides.
- the at least two first sections are laid in the outer region of the laying unit and the spirally arranged second section is laid in the middle region between the first sections.
- the spirally arranged second section is located in the central area in relation to the cross-sectional area of the green tire, since the requirements with regard to the loads in this area differ from those in the outer area, in particular in the shoulder area. Accordingly, it could be shown that the quality of the vehicle tire improves significantly if the central area is constructed in a spiral shape, preferably by means of "strip winding", while the outer areas are simply wrapped.
- the outer first sections only partially rest on the laying unit, so that the part that is not lying protrudes. This is then advantageous so that the outer areas can be joined together more easily, for example with side walls, which is ultimately advantageous for the construction of the green tire.
- the spirally arranged second section is placed at least partially overlapping.
- an individual thickness can advantageously be set. It is conceivable here that the second section is particularly preferably constructed so that it overlaps uniformly in order to obtain a constant thickness. However, it is also conceivable that the second section is particularly preferably constructed so that it overlaps non-uniformly in order to design individual areas with different thicknesses.
- the outermost area of the second section overlaps the one or both first sections. As an alternative to this, the first overlap occurs with the second wrapping of the continuous strip.
- part of the outer area of the first two sections is worked down after laying.
- the working down is usually done before or during the joining with the sidewalls.
- the side walls or side surfaces can thus be formed before the lay-up unit is expanded.
- At least two side walls are preferably provided before the inner layer is laid on and first the side walls are at least partially arranged on the laying-on unit and then the inner first layer is applied between the two side walls.
- the side walls are placed on the application unit together with the inner layer in one step, or the side walls are applied after the inner layer and the second layer have been placed in the shoulder area.
- the side walls can be introduced into the structure in different method steps, so that the process can be adjusted individually.
- the laying unit is expanded and the outer overhanging area of the layers is worked up by at least one shaping unit in each case.
- the carcass is built up on the laying unit, in particular on a combined carcass and crowning drum, with the at least two side walls joined together, whereby the joining can also take place during the building up of the carcass, and then in the course of the upward expansion of the laying unit worked.
- the side walls are at least partially placed on at least one shaping unit each, with the shaping unit being designed to work up the side walls. The working up can occur simultaneously with the expansion of the lay-up unit, or before or after it.
- a major advantage is that first the construction of the carcass with the joining of the sidewalls can be done and then can be assembled with the belt package.
- the method for manufacturing the green tire comprises the following steps:
- first inner layer on the at least one laying unit, wherein the inner layer comprises at least two first sections, each with a single wrap and at least one second spirally arranged section in a multiple wrap, with the first sections preferably being laid first or the second section first,
- the carcass comprising the first inner layer, at least a second layer disposed on the first layer and at least one core with apex, and building a green tire comprising the carcass, at least the two sidewalls and a belt package.
- the method for manufacturing the green tire comprises the following steps:
- the laying unit being arranged between the two forming units
- first inner layer on the at least one lay-up unit between the side walls, the inner layer having at least two first sections each with a single wrap and at least one second spirally arranged section, wherein the first sections or the second section are preferably laid on first, and the side walls and the inner layer are laid on in one step,
- the carcass comprising the first inner layer, at least a second layer arranged on the first and at least one apexed core , and
- a vehicle tire which is preferably produced by a described method, comprising an inner layer, at least one carcass, a core with apex and a belt package, the inner layer having at least two first sections, each with a wrapping and at least one helically arranged second section with multiple wraps.
- An essential advantage of a vehicle tire according to the invention is that it has an inner layer that can be individually adapted to different requirements by optimizing different sections of the tire cross section. For example, such an adjustment takes place with regard to different loads that arise either in the production process or in the tire when it is used on the vehicle. Additional requirements for concentricity, thickness constancy or thickness contour can be met much better by such a vehicle tire. Overall, the vehicle tire according to the invention has a significantly improved quality compared to those in the prior art.
- the inner layer of the vehicle tire has more than two distinct sections, namely the at least two first sections, the second section, and at least one third section, the third section either comprising a wrap or being spirally arranged, but a different one composition than the other sections.
- a vehicle tire with such an inner layer can be individually adjusted with regard to the layer thickness.
- the second spirally arranged section is arranged between the first sections.
- Such a vehicle tire advantageously has a significantly better quality, since the two differently constructed first and second sections are individually adapted, for example in terms of thickness.
- the spirally arranged second section is arranged at least partially overlapping.
- the overlapping can take place in different ways.
- the contour of the inner layer in the middle area of the vehicle tire can be designed individually.
- the two first sections are preferably each arranged in the area of the shoulder formation.
- the two first sections are particularly preferably arranged in the area below the core. Such an arrangement leads to an overall improved quality of the vehicle tire.
- FIG. 1a-e in side view a detail of an embodiment of the manufacturing method according to the invention for a vehicle tire with the steps a) to e) and
- FIGS. 1a-e) show a side view of a section of an embodiment of the manufacturing method according to the invention for a vehicle tire with steps a) to e).
- a laying unit 1 is arranged between two forming units 2 .
- An inner layer 3 is placed on the laying unit 1 and partly on the two forming units 2 in this step a).
- the inner layer 3 comprises two outer first sections 4 and a first intermediate second section 5, the first sections 4 being simply wrapped around the lay-up unit 1 and the second section 5 being spirally wrapped around the lay-up unit 1.
- a second layer 6 is then placed on the inner layer 3, with the outer ends of the second layer 6 protrude beyond the end of the inner layer 3.
- the second layer 6 usually comprises textile.
- step c the outer areas of the two layers 3, 6 are worked down. Then the layers 3, 6 are brought together with two cores 7 with apex 8 and two sidewalls 9 to obtain the carcass 10 with the sidewalls 9, as shown in step d). The joining of the carcass 10 and the sidewalls 9 can alternatively take place simultaneously with the working down.
- step e the carcass 10 is expanded with the side walls 9 and formed with a belt package 11 to form a green tire.
- FIGS 2a-e) show a detail of a second embodiment of the manufacturing method according to the invention for a vehicle tire with steps a) to e).
- step a) the laying unit 1 is arranged between two forming units 12 .
- a side wall 9 is placed on each of the shaping units 12 , with the side walls 9 also being partially placed on the placement unit 1 .
- the inner layer 3 is placed between the side walls 9 (step b), which is made up of two first, simply wrapped sections 4 and a second, spirally arranged section 5 .
- the second layer 6 is placed on the inner layer 3 , the second layer 6 also covering the side walls 9 .
- step d the two cores 7 with apex 8 are joined with the layers 3, 6 and the side walls 9.
- step e the application unit 1 is expanded and the side areas, in particular the side walls 9, are worked up with the shaping units 12 and joined together with a belt package 11 to form a green tire.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021213013.5A DE102021213013A1 (de) | 2021-11-18 | 2021-11-18 | Verfahren zum Aufbauen eines Fahrzeugreifens und Fahrzeugreifen |
| PCT/DE2022/200245 WO2023088521A1 (de) | 2021-11-18 | 2022-10-25 | Verfahren zum aufbauen eines fahrzeugreifens und fahrzeugreifen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4433293A1 true EP4433293A1 (de) | 2024-09-25 |
Family
ID=84329587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22800583.1A Withdrawn EP4433293A1 (de) | 2021-11-18 | 2022-10-25 | Verfahren zum aufbauen eines fahrzeugreifens und fahrzeugreifen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4433293A1 (de) |
| DE (1) | DE102021213013A1 (de) |
| WO (1) | WO2023088521A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4546812B2 (ja) * | 2004-12-02 | 2010-09-22 | 住友ゴム工業株式会社 | 空気入りタイヤ |
| JP5019595B2 (ja) * | 2007-05-24 | 2012-09-05 | 東洋ゴム工業株式会社 | 空気入りタイヤの製造方法 |
| CN102227305B (zh) * | 2008-12-15 | 2014-08-06 | 倍耐力轮胎股份公司 | 用于制造轮胎的方法以及通过所述方法获得的轮胎 |
| JP5287281B2 (ja) * | 2009-01-19 | 2013-09-11 | 横浜ゴム株式会社 | 空気入りタイヤの製造方法及び空気入りタイヤ |
| WO2014103110A1 (ja) * | 2012-12-26 | 2014-07-03 | 東洋ゴム工業株式会社 | 空気入りタイヤ及びその製造方法 |
| DE102014224422A1 (de) * | 2014-11-28 | 2016-06-30 | Continental Reifen Deutschland Gmbh | Verfahren zur Herstellung eines Rohreifens in Radialbauart |
-
2021
- 2021-11-18 DE DE102021213013.5A patent/DE102021213013A1/de active Pending
-
2022
- 2022-10-25 EP EP22800583.1A patent/EP4433293A1/de not_active Withdrawn
- 2022-10-25 WO PCT/DE2022/200245 patent/WO2023088521A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023088521A1 (de) | 2023-05-25 |
| DE102021213013A1 (de) | 2023-05-25 |
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