EP2315956A1 - Pièce plastique, notamment cage pour palier, en plastique pouvant réticuler par irradiation, et procédé de fabrication de cette pièce - Google Patents

Pièce plastique, notamment cage pour palier, en plastique pouvant réticuler par irradiation, et procédé de fabrication de cette pièce

Info

Publication number
EP2315956A1
EP2315956A1 EP09736106A EP09736106A EP2315956A1 EP 2315956 A1 EP2315956 A1 EP 2315956A1 EP 09736106 A EP09736106 A EP 09736106A EP 09736106 A EP09736106 A EP 09736106A EP 2315956 A1 EP2315956 A1 EP 2315956A1
Authority
EP
European Patent Office
Prior art keywords
plastic
radiation
pigments
cage
bearing
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Withdrawn
Application number
EP09736106A
Other languages
German (de)
English (en)
Inventor
Arbogast Grunau
Sergej Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2315956A1 publication Critical patent/EP2315956A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0041—Optical brightening agents, organic pigments
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/44—Selection of substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/56—Selection of substances
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation

Definitions

  • Plastic part especially cage for a bearing, made of a radiation-crosslinkable plastic, and method for its production
  • the invention relates to a plastic part, in particular a bearing part, especially a cage for receiving rolling elements of a bearing, especially a rolling bearing, according to the preamble of claim 1, wherein the body of the plastic part consists essentially of a radiation-crosslinkable plastic.
  • the invention further relates to a method according to claim 7 for producing a plastic part, in particular a bearing part, especially a cage for receiving rolling elements of a bearing, wherein the plastic part has a body made of a radiation-crosslinkable plastic.
  • a bearing part for example a bearing ring of a rolling or sliding bearing or a sliding lining of a sliding bearing or a lining of a sliding bearing track of a rolling bearing or a plastic seal, for example, for a bearing, or generally a plastic part is covered by the invention.
  • irradiation with high energy ionizing radiation for example X-ray or UV radiation or by means of particle radiation (such as beta radiation) causes chemical cross-linking of the material of the body of the cage resulting as a result Radiation significantly improved in terms of wear resistance.
  • high energy ionizing radiation for example X-ray or UV radiation or by means of particle radiation (such as beta radiation)
  • particle radiation such as beta radiation
  • EP 0 644 344 B1 describes a method for producing a rolling element receiving cage of a roller bearing, wherein the body of the cage from a under the action of radiation, in particular under the action of Beta radiation, crosslinkable plastic is provided, and wherein the body of the cage is fitted in the further course of the process with rolling elements.
  • the provided body of the cage is first equipped with the rolling elements and then exposed to the radiation. It proves to be disadvantageous that the rolling elements received in the body partially shield the adjacent region of the body from the radiation, so that the solidification of the body is incomplete, especially in the vicinity of the rolling elements.
  • the cage is not to be seen whether the irradiation has taken place, regardless of whether the cage is equipped with the rolling elements before or after the irradiation.
  • the production of radiation-crosslinkable plastic cages therefore requires a complex control for quality assurance. It is also envisaged to apply a rather overdosed radiation dose to ensure that the cages are fully cross-linked throughout the body and therefore solidified. This goes against a requirement for the lowest possible radiation exposure.
  • the optically detectable change in the pigments may be, for example, a color change which the pigments undergo due to the irradiation and which alters the color of the pigments and thus the color of the body of the cage.
  • it is easy to determine whether the body of the cage has been sufficiently irradiated so that a required strength is achieved, as well as whether there are areas on the body of the cage that insufficient irradiation, for example due to shading of the radiation , have received.
  • it may be provided to subject critical areas, for example those which require particularly high mechanical strength or which were shaded during the first irradiation, to further targeted irradiation as aftertreatment.
  • the pigments may also indicate whether the body of the cage has undergone a heat treatment. If necessary, two types of pigments may be provided, the first type indicating a color change upon irradiation with the high energy radiation, especially X-ray or UV radiation, and the second type of pigments having a color change upon heat input, for example a heat treatment after irradiation or a Heat input during operation of the cage. Due to the heat supply, the optical change of the pigments, for example the color change, can be reversed or the pigments can undergo a further optical change, for example a further color change.
  • the choice of pigments, the arrangement of the pigments on the surface or in the depth of the body of the cage and the conditions under which the pigments have the color change further allows to enable a coding of the cage represented by the pigments such that a Certain cages or a certain batch of cages are easily identifiable and counterfeits are easily detectable, since a counterfeiter can simply mimic a color of the cage, however, the selection and arrangement of the pigments before the color change can be kept secret and in case of need in the short term and easy without the color of the cage changing significantly after the color change of the pigments.
  • the pigments comprise a powder of glasses, gemstones or semi-precious stones.
  • the fine powder particles only insignificantly change the mechanical properties of the plastic of the body of the cage.
  • high-energy, ionizing radiation such as X-ray, UV or particle radiation (if the glasses were transparent) and / or a discoloration, for example a darkening.
  • the fine particles of glasses were admixed that the body undergoes a change in color during irradiation, such as a gray color, the indicates at which point of the body the networking of the plastic has progressed to what extent.
  • powders of fine particles of a precious or semi-precious stone such as beryl, diamond, quartz, sodium phir, spodumene, topaz, tourmaline or zirconium, which are either colorless before irradiation and obtained by the irradiation of a defined color or before irradiation have a color that deviates clearly recognizable from the color after irradiation.
  • the pigments can also include organic pigments, for example, organic complexes, which are stable at temperatures up to about 100 0 C and gene under irradiation of ionizing high-energy radiation a color change newspaper.
  • Fig. 1 shows a detail schematically an embodiment of a plastic part according to the invention.
  • Fig. 1 shows a detail of a body 1 of a plastic part, not shown, in particular a bearing part, especially a cage for receiving rolling elements of a rolling bearing.
  • the body 1 has a surface 2 and consists essentially of a radiation-crosslinkable plastic, such as PA66 with PTFE.
  • a radiation-crosslinkable plastic such as PA66 with PTFE.
  • Such a plastic is under the influence of high-energy radiation, preferably in particular X-radiation, crosslinkable, so that the body 1 of the cage is solidified with respect to the wear resistance.
  • the plastic of the body 1 of the cage pigments 3, 4 are mixed, which were selected so that these pigments 3, 4 perform a color change in the irradiation, compared to the rest of the material of the body 1 an externally visible change in the visual appearance of the body 1 of the cage, in particular a color change of the body 1 of the cage allows.
  • the plastic may be provided as a light, especially whitish plastic.
  • the pigments 3, 4 are formed as particles of a powder of zirconium, wherein the size ratios in Fig. 1 for the dimensions of the particles are not to scale. Zircon is substantially colorless when unirradiated.
  • the body 1 of the cage is substantially whitish-bright in the state before the X-ray irradiation.
  • the irradiation gives the zirconium particles 3, 4 a color change to blue or brown, so that the body 1 becomes darker after the irradiation.
  • the location-dependent darkening of the body 1 of the cage is a measure of the radiation dose produced at this location and thus an indicator of the degree of crosslinking of the plastic.
  • the invention is not limited to the use of zirconium particles as pigments.
  • other pigments especially inorganic pigments, offer particles of glasses, semi-precious stones or gems such as beryl (color change from pale yellow to pale pink by irradiation to green or dark blue), diamond (color change from yellowish, brownish or colorless by irradiation to blue, red, green or black), quartz (color change from colorless by irradiation to brown or black), sapphire (color change from colorless, pink or pale green by irradiation to green), spodumene (color change from pink by irradiation to yellow or green) or topaz (Color change from colorless by irradiation to blue, brown, green, or orange).
  • beryl color change from pale yellow to pale pink by irradiation to green or dark blue
  • diamond color change from yellowish, brownish or colorless by irradiation to blue, red, green or black
  • quartz color change from colorless by irradiation to brown or
  • the invention is also not limited to the use of inorganic pigments; organic pigments could also be provided.
  • the pigments 3 close to the surface 2 of the body 1 were made of the same material as the pigments 4 removed from the surface 2. It is understood that various pigments may be provided depending on the distance from the surface 2. As the intensity of the radiation decreases with the distance from the surface 2 in the body 1, that of the surface
  • pigments 3 show first a color change, later then the surface 2 more distant pigments 4.
  • pigments 3 show first a color change, later then the surface 2 more distant pigments 4.
  • zirconium particles of a zirconium powder can be provided and as particles 4 of a sapphire powder removed from the surface 2, wherein both the zirconium and the sapphire particles in the unirradiated state are substantially colorless and the body 1 of the plastic Cage whitish appears.
  • the pigments 3 change their color from colorless to blue or brown, so that the body 1 of the cage as a whole becomes darker.
  • the pigments 4 also change color from colorless to green, so that the body 1 of the cage as a whole becomes dark green.
  • various pigments 3, 4 may be present at different locations of the body 1 of the plastic part.
  • the pigments 3, 4 can also be provided exclusively on those regions of the body 1 in which a sufficient strength is absolutely necessary, for example in the region of the cage webs of the body 1.
  • the invention has been described above with reference to an embodiment in which the body 1 of the cage made of PA66 with PTFE.
  • other radiation-crosslinkable plastic such as other polyamide types, polyether Etherketonart, polypropylene, polyethylene or polyurethane or PTFE may be provided as plastic.
  • the radiation-crosslinkable plastic contains, in addition to the pigment 3, 4 plasticizers or crosslinking promoters as admixtures.
  • the plastic may contain other additives such as reinforcing fibers.
  • the term .pigment 1 does not only include those materials which on irradiation have a color change detectable in the visible light range.
  • pigments it is also possible to provide those materials which do not undergo a color change directly upon irradiation, but exhibit luminescence, in particular can be excited by the irradiation to phosphorescence or fluorescence, in particular during subsequent illumination by means of UV radiation, for example.
  • a corpus which has been treated with a fluorescent pigment need not have a color change which is significant in the area of visible light in the case of the irradiation causing the crosslinking of the plastic, but can make the previous irradiation optically detectable in the event of subsequent UV illumination.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Rolling Contact Bearings (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

L'invention concerne une pièce plastique, notamment une pièce de palier et en particulier une cage destinée à recevoir des éléments roulants d'un palier, le corps (1) de cette pièce étant essentiellement en plastique pouvant réticuler par irradiation. L'invention vise à permettre une identification simple de l'état d'irradiation du plastique pouvant réticuler par irradiation lors de la fabrication de la pièce plastique, notamment de la cage de palier à roulement. A cet effet, au plastique sont mélangés des pigments (3,4) dont l'apparence change lors de l'irradiation. L'invention porte également sur un procédé de fabrication d'une pièce plastique, notamment d'une pièce de palier et en particulier d'une cage destinée à recevoir des éléments roulants d'un palier, la pièce ayant un corps (1) en plastique pouvant réticuler par irradiation.
EP09736106A 2008-08-20 2009-08-18 Pièce plastique, notamment cage pour palier, en plastique pouvant réticuler par irradiation, et procédé de fabrication de cette pièce Withdrawn EP2315956A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008038578A DE102008038578A1 (de) 2008-08-20 2008-08-20 Kunststoffteil, speziell Käfig für ein Lager, aus einem strahlen-vernetzbaren Kunststoff, und Verfahren zu dessen Herstellung
PCT/DE2009/001175 WO2010020238A1 (fr) 2008-08-20 2009-08-18 Pièce plastique, notamment cage pour palier, en plastique pouvant réticuler par irradiation, et procédé de fabrication de cette pièce

Publications (1)

Publication Number Publication Date
EP2315956A1 true EP2315956A1 (fr) 2011-05-04

Family

ID=41531832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09736106A Withdrawn EP2315956A1 (fr) 2008-08-20 2009-08-18 Pièce plastique, notamment cage pour palier, en plastique pouvant réticuler par irradiation, et procédé de fabrication de cette pièce

Country Status (5)

Country Link
US (1) US8633271B2 (fr)
EP (1) EP2315956A1 (fr)
CN (1) CN102124239B (fr)
DE (1) DE102008038578A1 (fr)
WO (1) WO2010020238A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2517437A (en) * 2013-08-19 2015-02-25 Mahle Int Gmbh Sliding Engine Component
DE102014216882B4 (de) * 2014-08-26 2023-08-10 Aktiebolaget Skf Herkunftsidentifizierbares Lager
CN106151261A (zh) * 2016-08-17 2016-11-23 常州市武进长江滚针轴承有限公司 发光型滚针轴承
DE102022117497A1 (de) 2022-07-13 2024-01-18 Bayerische Motoren Werke Aktiengesellschaft Fahrzeugbauteil, Kraftfahrzeug mit Fahrzeugbauteil und Verfahren zur Herstellung eines Fahrzeugbauteils

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GB825689A (en) * 1956-10-23 1959-12-16 Skf Svenska Kullagerfab Ab Cage for rolling bodies in rolling bearings
NL9301602A (nl) 1993-09-16 1995-04-18 Skf Ind Trading & Dev Werkwijze voor de vervaardiging van een kooi voor een wentellager, een werkwijze voor de vervaardiging van een wentellager met een dergelijke kooi, alsmede een van een dergelijke kooi voorzien wentellager.
JP3438400B2 (ja) 1995-04-07 2003-08-18 松下電工株式会社 熱硬化性樹脂へのマーキング方法
DE10351812B4 (de) 2003-10-30 2006-04-20 Leibniz-Institut Für Polymerforschung Dresden E.V. Modifizierte Perfluor-Kunststoffe und Verfahren zu ihrer Herstellung
DE10351813B4 (de) 2003-10-30 2006-04-13 Leibniz-Institut Für Polymerforschung Dresden E.V. Radikalisch gekoppelte PTFE-Polymer-Pulver und Verfahren zu ihrer Herstellung
US20070080146A1 (en) 2003-11-10 2007-04-12 Werner Stockum Coloured laser marking
US7855241B2 (en) * 2005-10-18 2010-12-21 Sabic Innovative Plastics Ip B.V. Method of improving abrasion resistance of plastic article using nanoparticles and article produced thereby
DE102006034333A1 (de) * 2006-07-19 2008-01-31 Leibniz-Institut Für Polymerforschung Dresden E.V. Verfahren zur Strahlenmodifizierung von Polyamiden
CN200996412Y (zh) * 2006-12-29 2007-12-26 张世伟 带式输送机托辊新型专用轴承

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Also Published As

Publication number Publication date
US8633271B2 (en) 2014-01-21
WO2010020238A1 (fr) 2010-02-25
DE102008038578A1 (de) 2010-02-25
US20110216994A1 (en) 2011-09-08
CN102124239A (zh) 2011-07-13
CN102124239B (zh) 2017-03-22

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