EP4259420A1 - Vulkanisationsform für fahrzeugluftreifen - Google Patents
Vulkanisationsform für fahrzeugluftreifenInfo
- Publication number
- EP4259420A1 EP4259420A1 EP21830601.7A EP21830601A EP4259420A1 EP 4259420 A1 EP4259420 A1 EP 4259420A1 EP 21830601 A EP21830601 A EP 21830601A EP 4259420 A1 EP4259420 A1 EP 4259420A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- tread
- ribs
- vulcanization
- segments
- 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.)
- Pending
Links
- 238000004073 vulcanization Methods 0.000 title claims abstract description 21
- 238000005266 casting Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000004873 anchoring Methods 0.000 claims description 20
- 238000010309 melting process Methods 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 241000446313 Lamella Species 0.000 description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0612—Means for forming recesses or protrusions in the tyres, e.g. grooves or ribs, to create the tread or sidewalls patterns
-
- 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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres
Definitions
- the invention relates to a vulcanization mold for pneumatic vehicle tires with cast mold segments forming a tread of a pneumatic vehicle tire, which have at least ribs for forming grooves in the tread and lamellae for forming incisions in the tread.
- the vulcanization of vehicle tires takes place in heating presses, in each of which a vulcanization mold is used, which has mold segments that shape the tread of the tire with its profile.
- These mold segments are usually segments of a segment ring and have ribs for forming grooves in the tread, thin lamellae are anchored opposite the ribs in the vulcanization mold for forming incisions in the tread.
- the sipes are usually made of sheet steel, which is stamped, embossed and bent according to the desired design of the incisions in the tread and then anchored in the corresponding mold segment, which is made of an aluminum alloy by casting, during the casting process.
- the sprue results in a form fit, not a material bond.
- lamellae designed according to the prior art regardless of the type of manufacture, usually have holes through which the aluminum alloy of the vulcanization mold segment flows, so that the lamella is firmly connected to the relevant mold segment after the aluminum alloy has solidified.
- these holes usually do not lead to sufficient stability and anchoring of the lamella in the aluminum alloy of the mold segment, in particular on the end faces of the mold segments.
- separate elements are necessary, as already described, which are usually cast into the basic structure of the cast aluminum mold segments.
- these cast-in elements are subject to larger tolerances than directly cast structures. This can be particularly problematic for elements such as tire-shaped ribs, which describe the lowest point in the embossing in the tire profile, because the tolerances are decisive for whether the shape penetrates through the tread compound to the layers underneath and damages them .
- DE 10 2018 220 806 A1 discloses slats that are intended to ensure improved stability of the anchoring of the slat in the aluminum base structure of the mold segments.
- the invention was based on the object of creating a vulcanization mold of the type described at the outset which, while retaining the inexpensive casting process for the mold segments, enables tread profiles to be formed with grooves and incisions, the incisions being able to have chamfers in the transition to adjacent blocks in the tread profile and in which the manufacturing limitations described are minimized.
- ribs and lamellae for producing grooves and incisions are at least partially subsequently introduced into the mold segments after the mold segments have been cast.
- the mold segments have recesses in predetermined areas, into which separately produced lamellae and/or ribs can be inserted.
- the recesses in the mold segments have anchoring modules and the lamellae and/or ribs have components corresponding to the anchoring modules, with the anchoring modules and the components being intended to ensure a secure Ensure retention of the slats and/or ribs in the recesses.
- the lamellae and/or ribs have integrally formed, laterally protruding and beveled elements which, with a predetermined geometry, are suitable for forming chamfers in the transition from the tread surface to incisions or grooves.
- a rounding with a predetermined radius is arranged in the outlet of the elements protruding from the lamella and/or rib.
- the radius prevents the beveled elements forming the chamfers from becoming so thin in the run-out that an uncontrolled geometry arises and the elements can break off.
- the lamellae and/or ribs are made porous at least in partial areas.
- the porous areas may allow crossventing to function between adjacent blocks.
- the lamellae and/or ribs are produced using a 3D printing process.
- 3-D printing processes have the advantage that a large variety of different geometries can be produced easily and in a large variety of materials.
- the lamellae and/or ribs are produced by means of a selective laser melting process.
- Particularly high-strength shaped elements can also be produced, in particular by laser melting processes.
- Both the 3-D printing process and, in particular, the laser melting process are well suited for seamlessly producing the ribs and lamellas mentioned in one piece.
- a large variety of geometries can be produced by the separate manufacture of the lamellae and/or ribs.
- FIG. 1 shows a section of a mold segment of a vulcanization mold according to the invention
- the mold segment 1 shows a section of a mold segment 1 of a vulcanization mold according to the invention in a basic cross section.
- the mold segment 1 is cast from aluminum and has two recesses 3 and 4 and two ribs 5 and 6.
- the ribs 5 and 6 point into the interior of the vulcanization mold, not shown here, upwards in the drawing position.
- Two slats 7 and 8 are arranged in the recesses 3 and 4, shown here in a side view.
- Anchoring device 9 and 10 firmly connected to the mold segment 1.
- the Anchoring devices interact with the slats 7 and 8 and firmly couple them to the mold segment 1 .
- the recess 3 extends into the mold segment 1 and includes the anchoring device 9, the anchoring device 9 being anchored in the recess 3 here by a press fit.
- the lamella 7 is arranged on the anchoring device 9 , the anchoring device being in one piece with the lamella 7 .
- Lamella 7 with the anchoring device 9 are printed in one piece from a high-strength and temperature-stable material using a 3-D printing process.
- the oblique transition areas 12 and 13 each have a radius in their ends 14 and 15 protruding from the lamella 7, which is made visible in the partial illustration "A". Due to the fact that the lamella 7 is firmly connected to the mold segment 1 via the anchoring device 9 and the anchoring device is clamped in the recess 3, the inclined transition areas 12 and 13 lie firmly on a surface 16 of the mold segment 1, so that a gap is formed between the Surface 16 and the lamella 7 can be neglected.
- the lamella 7 produces an incision in a vehicle tire tread strip (not shown here) to be produced with the vulcanization mold, which is lined with chamfers to be produced by the inclined transition regions 12 and 13 (also not shown).
- the mold segment 1 is cast from aluminum, it can be produced easily and inexpensively, with the relatively unproblematic ribs 5 and 6 also being cast on. 3-D printing makes it possible to also produce sloping transitional areas 12 and 13 for the slats 7 and 8 in one operation without the risk of gap formation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020215768.5A DE102020215768A1 (de) | 2020-12-11 | 2020-12-11 | Vulkanisationsform für Fahrzeugluftreifen |
PCT/DE2021/200253 WO2022122098A1 (de) | 2020-12-11 | 2021-12-09 | Vulkanisationsform für fahrzeugluftreifen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4259420A1 true EP4259420A1 (de) | 2023-10-18 |
Family
ID=79021776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21830601.7A Pending EP4259420A1 (de) | 2020-12-11 | 2021-12-09 | Vulkanisationsform für fahrzeugluftreifen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240034013A1 (de) |
EP (1) | EP4259420A1 (de) |
CN (1) | CN116669936A (de) |
DE (1) | DE102020215768A1 (de) |
WO (1) | WO2022122098A1 (de) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1078762B (de) * | 1955-09-08 | 1960-03-31 | Super Mold Corp | Pressform zum Herstellen von Fahrzeugreifen |
DE4341683A1 (de) * | 1993-12-07 | 1995-06-08 | Sp Reifenwerke Gmbh | Profilsegmentsystem, insbesondere für Reifenvulkanisierformen und Verfahren zur Herstellung eines Profilsegments eines solchen Systems |
DE102012102322A1 (de) * | 2012-03-20 | 2013-09-26 | Continental Reifen Deutschland Gmbh | Verfahren zur Herstellung einer Vulkanisierform für Fahrzeugreifen und eine durch das vorgenannte Verfahren hergestellte Vulkanisierform |
DE102015202328A1 (de) | 2015-02-10 | 2016-08-11 | Continental Reifen Deutschland Gmbh | Lamelle |
DE102018220806A1 (de) | 2018-12-03 | 2020-06-04 | Continental Reifen Deutschland Gmbh | Lamelle und Vulkanisationsform mit Lamellen |
-
2020
- 2020-12-11 DE DE102020215768.5A patent/DE102020215768A1/de active Pending
-
2021
- 2021-12-09 EP EP21830601.7A patent/EP4259420A1/de active Pending
- 2021-12-09 CN CN202180082897.5A patent/CN116669936A/zh active Pending
- 2021-12-09 US US18/257,069 patent/US20240034013A1/en active Pending
- 2021-12-09 WO PCT/DE2021/200253 patent/WO2022122098A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2022122098A1 (de) | 2022-06-16 |
US20240034013A1 (en) | 2024-02-01 |
CN116669936A (zh) | 2023-08-29 |
DE102020215768A1 (de) | 2022-06-15 |
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Legal Events
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Effective date: 20230711 |
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AK | Designated contracting states |
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RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CONTINENTAL REIFEN DEUTSCHLAND GMBH |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) |