WO2022128016A1 - Drahtkern einer wulstringanordnung in einem fahrzeugluftreifen und vorrichtung zur herstellung desselben - Google Patents
Drahtkern einer wulstringanordnung in einem fahrzeugluftreifen und vorrichtung zur herstellung desselben Download PDFInfo
- Publication number
- WO2022128016A1 WO2022128016A1 PCT/DE2021/200244 DE2021200244W WO2022128016A1 WO 2022128016 A1 WO2022128016 A1 WO 2022128016A1 DE 2021200244 W DE2021200244 W DE 2021200244W WO 2022128016 A1 WO2022128016 A1 WO 2022128016A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wire
- winding
- wire core
- pneumatic vehicle
- vehicle tire
- Prior art date
Links
- 239000011324 bead Substances 0.000 title claims abstract description 21
- 238000004804 winding Methods 0.000 claims description 95
- 239000011159 matrix material Substances 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 description 27
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000010073 coating (rubber) Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
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)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
-
- 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)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
- B29D2030/487—Forming devices for manufacturing the beads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
- B60C2015/048—Polygonal cores characterised by the winding sequence
Definitions
- the invention relates to a wire core of a bead ring arrangement in a pneumatic vehicle tire, consisting of a wire bundle of several superimposed wire layers of a ring-wound individual wire, the wire bundle viewed in cross section essentially forming a polygon comprising at least six corners. Furthermore, the invention relates to a bead ring arrangement of a pneumatic vehicle tire with such a wire core, a pneumatic vehicle tire equipped with the bead ring arrangement and a device for producing such a wire core.
- the wire core of a bead ring arrangement in a pneumatic vehicle tire serves to fix the pneumatic vehicle tire on the rim and, in the case of a tubeless pneumatic vehicle tire, also to ensure the airtightness between tire and rim.
- Pierce cores comprise wire cores wound in layers, which can be produced quickly and easily from different layers of wire with approximately rectangular strips or wires arranged in parallel and have a cross-section encompassing four corners.
- Such Pierce cores are prone to manufacturing variances that cause undesirable tire non-uniformity and provide low tensile strength.
- An example of such a Pierce core is disclosed in US Pat. No. 1,763,179.
- a further embodiment is represented by cable or helicoil cores, which are produced from at least two individual wires and run from the inside to the outside or from the outside to the inside be layered. Disadvantages here are very high production costs and difficult processing as well as a large scatter in the inner diameter achieved and large deflection under compressive load.
- polygonal cores with at least a hexagonal cross section in particular hexagonal so-called hexa cores, are therefore usually used as the wire core, which are made from a single, usually round cross-section, rubberized individual wire to form a wire package several layers of wire arranged one above the other, which forms a polygon comprising six corners when viewed in cross section.
- the wire core which are made from a single, usually round cross-section, rubberized individual wire to form a wire package several layers of wire arranged one above the other, which forms a polygon comprising six corners when viewed in cross section.
- polygonal cores of this type require a very precise tool during production and a greater time requirement in production than, for example, Pierce cores, since they are wound from a single wire that is supplied in an endless manner.
- polygonal wire cores with an at least hexagonal cross section have hitherto always required a so-called inclination angle, under which the radially inner wire layer runs and which is set between about 1.6° - 2.7° in terms of production technology and, in the case of pneumatic vehicle tires for slanted shoulder rims, even up to 5 ° is set, which, however, affects the suitability for shoulder rims.
- Universal suitability for both flat shoulder and sloping shoulder rims is achieved with an inclination angle of between 2° and approx.
- the object of the invention is to propose a wire core of the type mentioned at the outset, with a polygon in cross section essentially comprising at least six corners, which is easy to produce and has no orientation to be observed during production, so that faulty production can be traced back to incorrect orientation of the wire core of a pneumatic vehicle tire equipped with it can be reliably avoided.
- the proposal according to the invention provides that the ring surface defined by the radially inner wire layer runs at right angles to the plane enclosed by the wire core, so that a wire core according to the invention has an inclination angle of 0° on the ring surface defined by the radially inner wire layer, i. H. the wire core manages without an inclination angle.
- the Strength properties of the wire core designed according to the invention can nevertheless be adjusted within wide limits, so that pneumatic vehicle tires designed with such wire cores are suitable both for flat shoulder rims and for sloping shoulder rims with and without a tube.
- the annular surface defined by the radially outer wire layer runs parallel to the annular surface defined by the radially inner wire layer, as a result of which a particularly compact and heavy-duty wire core is obtained.
- the wire core is formed from a rubberized single wire with a round cross-section, but modified cross-sectional shapes, for example approximately square wire cross-sections, can also be used.
- the radially inner wire layer can comprise three to seven windings of the individual wire.
- a larger number of windings of the individual wire in the radially inner wire layer and thus a wire core with a larger cross-sectional area can also be produced with the invention, for example eight or more such windings.
- a significant advantage of the wire core according to the invention is that the direction of winding within the individual wire layers is arbitrary without changes in the strength or other properties of the pneumatic vehicle tires produced using the wire cores according to the invention.
- wire cores with a specified inclination angle >0° there is always a fixed starting position of the beginning of the wire and, starting from this, a fixed winding direction of the individual wire, which changes from the radially inner layer to the radially outwardly adjoining layers in a meandering shape when viewed in cross section. This is complex in terms of manufacturing technology and prone to errors.
- the radially inner wire layer can be wound both from left to right and from right to left, viewed in cross section, without this having any effect would have on the properties of the wire core according to the invention. This greatly simplifies production and eliminates other sources of error.
- the invention also relates to a bead ring arrangement of a pneumatic vehicle tire, which comprises such a wire core as well as an apex made of a plastic and/or vulcanizable rubber material and adjoining the wire core radially on the outside.
- the invention also relates to a pneumatic vehicle tire which is provided with such a bead ring arrangement.
- the pneumatic vehicle tire can have bead ring arrangements in which the winding directions of the two wire cores are designed to be the same or different in relation to the circumferential direction of the pneumatic vehicle tire.
- the first turns of the radially inner wire layers of the two wire cores of a pneumatic vehicle tire in the two bead regions can be positioned axially inside in one wire core and axially outside in the other wire core, or are positioned axially symmetrically in both wire cores in relation to the pneumatic vehicle tire.
- the device used to produce a wire core according to the invention with an annular surface defined by the radially inner wire layer at right angles to the plane enclosed by the wire core is based on the fact that it comprises a three-part winding matrix for the wire package.
- These three parts of the winding die comprise a winding base arranged radially on the inside, as well as lateral guides adjoining the winding base on the right and left, which form a winding shape open radially on the outside, into which the individual wire to be wound is inserted and, after fixing its leading end, rotated by the winding die to form the successive layers of wire is wound to the wire core.
- the winding base is aligned horizontally and the winding base and the side guides can be moved from a winding position in which they form the winding matrices into a removal position releasing the finished wound wire package.
- the mobility of the individual parts of the winding die provided according to the invention and the horizontal orientation of the winding base make it possible to wind the wire core on its annular surface defined by the radially inner wire layer with an inclination angle of 0°.
- the annular surface runs at right angles to the plane enclosed by the wire core. Nevertheless, after the wire core according to the invention has been produced, the winding matrix can be opened without any problems in order to remove the wire core according to the invention.
- At least one of the two side guides or both side guides of the winding matrix can be positioned at different predeterminable distances from one another on the winding base, which correspond to the width of 3 to 7 turns of the individual wire adjacent to the winding base, i.e. on the radially inner wire layer , so that a wire core with a wire layer on the inside radially consisting of three to seven individual wires can be produced on the same winding die, depending on the production requirements.
- Wire cores with a greater width, for example more than seven turns of the individual wire in the radially inner wire layer can also be produced using the same manufacturing principle.
- the precise positioning of one or both side guides considerably simplifies the production of such polygonal wire cores wound from a single wire. Extensive and time-consuming tool changes are no longer necessary to the extent known, and the production of such wire cores with cross-sectional areas of different sizes is possible through comparatively simple scaling.
- a complete automation of the work processes in the production of such polygonal wire cores wound from a wire is made possible at comparatively low costs.
- the first winding of the individual wire can be formed on the winding base in contact with the timely or left-hand side guide.
- the winding base and the side guides can be moved independently of one another by means of separate drives between the winding position and the removal position, or the winding base is moved together with one of the side guides between the winding position and the removal position.
- Figure 1 is a highly simplified cross-sectional view of a tire according to the invention.
- Figure 2 shows the wire core in a perspective enlarged view
- Figure 3 is a highly simplified cross-sectional view of a tire according to
- FIG. 4 shows the wire core according to FIG. 3 in an enlarged representation
- FIGS. 5a to 5c show the production of the wire core according to FIG. 2 in a first embodiment of the invention
- FIGS. 6a to 6c show the production of the wire core according to FIG. 2 in a second embodiment of the invention
- FIG. 7 different settings of the device according to FIG. 6a.
- FIG. 3 shows a greatly simplified representation of a cross section of the bead area 20 of a pneumatic vehicle tire 2, with which it is inserted into a bevel or flat shoulder rim (not shown).
- the bead area 20 is provided with an embedded wire core 1, which, as shown in Figure 4, consists of a wire package of several wire layers 10, 11, 12, 13 arranged one above the other of a correspondingly ring-shaped wound individual wire 100.
- the individual wire 100 is usually provided with a rubber coating on the outside as a closed covering.
- the wire package 1 has an essentially polygonal cross-section with six corners, so that such a wire core is also referred to as a hexa core.
- This cross-sectional shape results from the fact that the radially inner wire layer 10 in the exemplary embodiment shown comprises four windings of the individual wire 100, the next wire layer 11 adjoining radially on the outside comprises five such windings of the individual wire 100, followed by a further wire layer 12 with a total of six windings of the individual wire 100 and finally the radially outer wire layer 13 with again five turns of the individual wire 100.
- Other numbers of turns can also be provided, but the desired hexagonal shape of the wire core 1 is produced by initially increasing the number of turns with a subsequent decrease from radially inside outwards.
- the wire cores 1 In practice, however, it occasionally happens that the wire cores 1, the slight inclination of which is difficult to recognize due to the inclination angle a of, for example, only 2°, are installed in the wrong orientation in the pneumatic vehicle tire 2, for example if the two from the figure 3 visible right and left wire cores 1 are swapped and the annular surfaces R enclose an obtuse angle open radially inward, or one of the wire cores 1 is installed in the reverse orientation so that the annular surfaces R run parallel to one another.
- the pneumatic vehicle tire 2 has significant manufacturing defects that can lead to failure, which must be avoided at all costs.
- the correct alignment of the wire cores 1 cannot be checked non-destructively as part of quality control.
- wire cores 1 are used in the embodiment according to the invention, which also have a hexagonal cross section and consist of matching wire layers 10, 11, 12, 13 of a rubberized individual wire 100 as in Figures 3 and 4 exist.
- the wire cores 1 are wound in such a way that the annular surface R defined by the radially inner wire layer 10 runs exactly at right angles to the plane E enclosed by the wire core, so that the wire core 1 has an inclination angle a of 0°, since the annular surface R is aligned with the horizontal H coincides. It is obvious that with such an embodiment, the orientation of the wire cores 1 does not have to be taken into account, since it is always the same.
- the axial extent BPK of the wire core 1, the height HPK of the wire core 1 and the axial extent B of the radially inner wire layer 10 of the wire core 1 are not changed by the inclination angle a of 0°.
- the Tensile strength of the wire core 1 and deformation of the wire core 1 under compression are also unchanged, so that wire cores 1 with an inclination angle a of 0° can be introduced into existing tire structures with little effort.
- the wire core 1 according to Figure 2 is wound from a single individual wire 100 with a round cross-section, which comprises a metal wire 102 with a surface rubber coating 101, wherein in the illustrated embodiment according to Figure 2 the radially inner wire layer 10 has four turns, the adjacent wire layer 11 has five turns, the subsequent wire layer 12 has six turns and the radially outer wire layer 13 in turn has five turns.
- the annular surface defined by the radially outer wire layer 13 runs parallel to the annular surface R defined by the radially inner wire layer 10. It can also be seen from the illustration according to FIG dashed-indicated apex 21 made of a suitable plastic and/or rubber material, which together define the bead area 20 of the pneumatic vehicle tire 2 .
- a three-part winding matrix 4 is used, which comprises a horizontally aligned winding base 40 and a left-hand side guide 41 adjoining above or radially outside of the winding base 40 and a corresponding right-hand side guide 42 .
- the winding base 40 and the side guides 41, 42 define a winding space in which the wire layers 10,11, 12,13 of the wire core 1 are wound as a wire package with the desired hexagonal cross section.
- the winding matrix 4 is in a winding position and the leading end of the individual wire 100 is placed on the winding base 40 and fixed, for example, lying against the left-hand side guide 41 .
- the continuously fed single wire 100 is then initially wound in the desired number of turns to form the first wire layer 10 and, when it reaches the right-hand lateral guide 42, meanderingly wound in the opposite direction, forming the turns of the second wire layer 11 and so on, until the entire wire core 1 is made. Finally, the individual wire 100 is cut off.
- the beginning of the winding of the first wire layer 10, for example on the left-hand lateral guide 41, in the direction of the right-hand lateral guide 42 is not mandatory, because the winding direction can also be applied to the right-hand lateral guide 42 due to the non-existent inclination angle a in the direction of the left-hand lateral guide 41 without the property profile of the wire core 1 changing as a result.
- the winding direction of the individual wire 100 within the wire core 1 does not have to be taken into account either during the production of the wire core 1 , the storage of the wire cores 1 , or during subsequent installation in the pneumatic vehicle tire 2 .
- the winding die 4 is opened as shown in Figure 5b, in which the left-hand side guide 41 and the horizontal winding base 40 are moved to the left by means of drives that can be operated independently of one another, and the right-hand side guide 42 is moved to the right by means of a further drive , as indicated by arrows in the illustration according to FIG. 5b. If the first turn C of the radially inner wire layer 10, as shown in FIG. 5a, is oriented towards the side guide 42, the winding base 40 of the winding matrix 4 should preferably first be moved to the left, as shown in FIG. 5b.
- the two Lateral guides 41 and 42 of the winding matrix 4 are to be moved, depends on the spatial conditions in the machine in which the winding matrix 4 is installed and on the method with which the wire cores 1 are removed from this machine. If the first turn C of the radially inner wire layer 10 is oriented towards the lateral guide 41, the winding base 40 and lateral guide 42 should be moved to the right together until the wire core 1 detaches from the winding matrix 4 or can be removed.
- the horizontally aligned winding base 40 cannot be moved independently of the lateral guides 41, 42 with its own drive, but is fixed to the right-hand lateral guide 42, for example by means of a leg 400. It goes without saying that this fixing could alternatively also take place on the lateral guide 41 on the left-hand side.
- the two side guides 41, 42 are moved into their removal position, which releases the wire package, as shown in FIG is pulled out.
- the sequence with which the winding base 40 and the side guides 41, 42 of the winding matrix 4 are moved along the time axis depends, as described above, on the position of the first turn C, the spatial conditions in the machine and the method with which the wire core 1 is removed from the machine. Then, as shown in FIG. 6C, the wire core 1 can be removed without any problems.
- wire cores 1 with, for example, three turns in the radially inner wire layer 10 Setting the smallest distance A5 and, by selecting the further distances A4, A3, A2 to A1, to produce wire cores 1 that correspond to four turns (distance A4), five turns (distance A3), etc. up to seven turns at distance A1 in of the radially inner wire layer 10 have.
- Wire cores 1 with larger cross-sectional areas and wider radially inner wire layers 10 can also be produced using the same method.
- the strength properties of the wire cores 1 produced can be flexibly adjusted within wide limits, so that the pneumatic vehicle tires 2 equipped with them can be configured both for use with flat shoulder rims and with sloping shoulder rims according to the utilization of the pneumatic vehicle tire 2 and the vehicle use intended by the respective customer.
- the lateral guides 41, 42 are positioned at different distances A1, A2, A3, A4, A5 from one another in the exemplary embodiment according to FIGS. 5a to 5c due to the independent drives for the lateral guides in 41, 42 and the winding base 40 can.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Ropes Or Cables (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21824476.2A EP4263197A1 (de) | 2020-12-15 | 2021-12-07 | Drahtkern einer wulstringanordnung in einem fahrzeugluftreifen und vorrichtung zur herstellung desselben |
CN202180084098.1A CN116583415A (zh) | 2020-12-15 | 2021-12-07 | 车辆充气轮胎中的胎圈环组件的钢丝芯及其制造设备 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020215899 | 2020-12-15 | ||
DE102020215899.1 | 2020-12-15 | ||
DE102020216445.2 | 2020-12-22 | ||
DE102020216445.2A DE102020216445A1 (de) | 2020-12-15 | 2020-12-22 | Drahtkern einer Wulstringanordnung in einem Fahrzeugluftreifen und Vorrichtung zur Herstellung desselben |
Publications (1)
Publication Number | Publication Date |
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WO2022128016A1 true WO2022128016A1 (de) | 2022-06-23 |
Family
ID=78916673
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PCT/DE2021/200244 WO2022128016A1 (de) | 2020-12-15 | 2021-12-07 | Drahtkern einer wulstringanordnung in einem fahrzeugluftreifen und vorrichtung zur herstellung desselben |
Country Status (2)
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EP (1) | EP4263197A1 (de) |
WO (1) | WO2022128016A1 (de) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1763179A (en) | 1929-05-17 | 1930-06-10 | Nat Standard Co | Tire-bead reenforcement |
US3741262A (en) * | 1970-03-12 | 1973-06-26 | Nat Standard Co | Manufacture of bead wires for tyres |
DE7713948U1 (de) | 1977-05-03 | 1977-09-29 | Uniroyal Ag, 5100 Aachen | Hochbelastbarer, auf schraegschulterfelgen montierbarer fahrzeugluftreifen mit einer ringfoermigen verstaerkungseinheit fuer den wulst |
DE4308359A1 (de) | 1993-03-16 | 1994-09-22 | Sp Reifenwerke Gmbh | Wulstringanordnung für Fahrzeugreifen |
WO2000054964A1 (en) * | 1999-03-12 | 2000-09-21 | The Goodyear Tire & Rubber Company | Tire bead and its method of manufacture |
EP1754593A1 (de) * | 2004-05-28 | 2007-02-21 | Bridgestone Corporation | Verfahren und vorrichtung zum formen einer wulst |
KR20110072852A (ko) * | 2009-12-23 | 2011-06-29 | 한국타이어 주식회사 | 중하중용 타이어를 제조하는 완성비드 포머의 세그멘트 |
KR20140041016A (ko) * | 2012-09-27 | 2014-04-04 | 한국타이어 주식회사 | 타이어용 비드 성형장치 |
DE112018006136T5 (de) * | 2017-12-01 | 2020-08-20 | The Yokohama Rubber Co., Ltd. | Luftreifen |
-
2021
- 2021-12-07 EP EP21824476.2A patent/EP4263197A1/de active Pending
- 2021-12-07 WO PCT/DE2021/200244 patent/WO2022128016A1/de active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1763179A (en) | 1929-05-17 | 1930-06-10 | Nat Standard Co | Tire-bead reenforcement |
US3741262A (en) * | 1970-03-12 | 1973-06-26 | Nat Standard Co | Manufacture of bead wires for tyres |
DE7713948U1 (de) | 1977-05-03 | 1977-09-29 | Uniroyal Ag, 5100 Aachen | Hochbelastbarer, auf schraegschulterfelgen montierbarer fahrzeugluftreifen mit einer ringfoermigen verstaerkungseinheit fuer den wulst |
DE4308359A1 (de) | 1993-03-16 | 1994-09-22 | Sp Reifenwerke Gmbh | Wulstringanordnung für Fahrzeugreifen |
WO2000054964A1 (en) * | 1999-03-12 | 2000-09-21 | The Goodyear Tire & Rubber Company | Tire bead and its method of manufacture |
EP1754593A1 (de) * | 2004-05-28 | 2007-02-21 | Bridgestone Corporation | Verfahren und vorrichtung zum formen einer wulst |
KR20110072852A (ko) * | 2009-12-23 | 2011-06-29 | 한국타이어 주식회사 | 중하중용 타이어를 제조하는 완성비드 포머의 세그멘트 |
KR20140041016A (ko) * | 2012-09-27 | 2014-04-04 | 한국타이어 주식회사 | 타이어용 비드 성형장치 |
DE112018006136T5 (de) * | 2017-12-01 | 2020-08-20 | The Yokohama Rubber Co., Ltd. | Luftreifen |
Also Published As
Publication number | Publication date |
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EP4263197A1 (de) | 2023-10-25 |
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