DE102005051914A1 - Cage for antifriction bearing, has synthetic base material and number of intake pockets for antifriction bearing whereby hard material particles are added to the synthetic base material with particle size lying between one Nm and fifty Nm - Google Patents
Cage for antifriction bearing, has synthetic base material and number of intake pockets for antifriction bearing whereby hard material particles are added to the synthetic base material with particle size lying between one Nm and fifty Nm Download PDFInfo
- Publication number
- DE102005051914A1 DE102005051914A1 DE102005051914A DE102005051914A DE102005051914A1 DE 102005051914 A1 DE102005051914 A1 DE 102005051914A1 DE 102005051914 A DE102005051914 A DE 102005051914A DE 102005051914 A DE102005051914 A DE 102005051914A DE 102005051914 A1 DE102005051914 A1 DE 102005051914A1
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- Germany
- Prior art keywords
- base material
- cage according
- cage
- vol
- plastic base
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 52
- 239000002245 particle Substances 0.000 title claims abstract description 32
- 229920003023 plastic Polymers 0.000 claims description 25
- 239000004033 plastic Substances 0.000 claims description 25
- 239000004952 Polyamide Substances 0.000 claims description 13
- 229920002647 polyamide Polymers 0.000 claims description 13
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 11
- 229920002530 polyetherether ketone Polymers 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000011224 oxide ceramic Substances 0.000 claims description 8
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 8
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920006324 polyoxymethylene Polymers 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000012783 reinforcing fiber Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000002105 nanoparticle Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 4
- 229920003225 polyurethane elastomer Polymers 0.000 description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- 239000004697 Polyetherimide Substances 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920001601 polyetherimide Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 238000009757 thermoplastic moulding Methods 0.000 description 2
- 229920012266 Poly(ether sulfone) PES Polymers 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000010101 extrusion blow moulding Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 229920000412 polyarylene Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/60—Thickness, e.g. thickness of coatings
- F16C2240/64—Thickness, e.g. thickness of coatings in the nanometer range
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Die Erfindung betrifft einen Käfig für ein Wälzlager, der aus einem Kunststoff-Basismaterial besteht und eine Anzahl Aufnahmetaschen für Wälzkörper aufweist.The The invention relates to a cage for a rolling bearing, which consists of a plastic base material and a number of receiving pockets for rolling elements.
Als Material für Wälzlagerkäfige werden diverse Kunststoffe eingesetzt. Als Beispiele seien Polyethersulfon (PES), Polyetherimid (PEI), Polyamid (PA) Polyetheretherketon (PEEK) und Polyoxymethylen (POM) genannt. Mit den genannten Materialien kann eine relativ hohe Temperaturbeständigkeit des Käfigmaterials bei Betriebstemperaturen von über 150 °C erreicht werden.When Material for Rolling cages are various plastics used. Examples are polyethersulfone (PES), polyetherimide (PEI), polyamide (PA) polyetheretherketone (PEEK) and polyoxymethylene (POM). With the mentioned materials can be a relatively high temperature resistance of the cage material at operating temperatures of over 150 ° C reached become.
Ein
Wälzlagerkäfig der
eingangs genannten Art ist aus der
Wenngleich mit den vorbekannten Kunststoffen bzw. Kunststoffzusammensetzungen bereits Käfige für Wälzlager herstellbar sind, die hohen Ansprüchen an Unempfindlichkeit gegenüber Temperaturen und aggressiven Umgebungsbedingungen genügen, besteht der Wunsch nach weiterer Erhöhung der Widerstandsfähigkeit gegen raue Umgebungsbedingungen, wobei die Funktionalität des Käfigs insbesondere im Hinblick auf die Härte und Verschleißfestigkeit optimiert werden soll.Although with the previously known plastics or plastic compositions already cages for rolling bearings can be produced, the high demands on insensitivity to temperatures and meet aggressive environmental conditions, there is a desire for further increase the resilience against harsh environmental conditions, the functionality of the cage in particular in terms of hardness and wear resistance to be optimized.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Käfig für ein Wälzlager der eingangs genannten Art so weiterzubilden, dass es ein weiter verbessertes Verhalten in Bezug auf Verschleißfestigkeit und thermische Stabilität aufweist, so dass die Lebensdauer und Leistungsfähigkeit des Käfigs weiter erhöht werden können. Ferner soll eine möglichst wirtschaftliche Herstellung des Käfigs erreicht werden.Of the Invention is therefore based on the object, a cage for a rolling bearing of the aforementioned type so that it is a further improved Behavior in terms of wear resistance and thermal stability so that the life and performance of the cage continues elevated can be. Furthermore, a possible economic Production of the cage be achieved.
Die Lösung dieser Aufgabe durch die Erfindung ist dadurch gekennzeichnet, dass dem Kunststoff-Basismaterial, das den Käfig bildet, Hartstoffteilchen zugemischt sind, die eine Partikelgröße zwischen 1 nm und 50 nm aufweisen. Bevorzugt liegt die Partikelgröße zwischen 10 nm und 30 nm. Als Partikelgröße sei der mittlere Partikeldurchmesser verstanden.The solution this object by the invention is characterized in that the plastic base material that forms the cage, hard particles are admixed having a particle size between 1 nm and 50 nm exhibit. The particle size is preferably between 10 nm and 30 nm. As particle size is the Mean particle diameter understood.
Als Hartstoffteilchen kommt bevorzugt eine Oxidkeramik oder eine Mischung verschiedener Oxidkeramiken zum Einsatz. Besonders bevorzugt ist dabei an Siliziumdioxid (SiO2) gedacht. Dieses Material wird bevorzugt in neutraler Form mit einem pH-Wert von ca. 7,4 verwendet.The hard material particles used are preferably an oxide ceramic or a mixture of different oxide ceramics. Particular preference is given to silicon dioxide (SiO 2 ). This material is preferably used in neutral form with a pH of about 7.4.
Der Anteil der Hartstoffteilchen kann zwischen 0,5 Vol.-% (Volumenprozent) und 25 Vol.-% betragen. Besonders bevorzugt kommt ein Anteil an Hartstoffteilchen zwischen 1 Vol.-% und 5 Vol.-% zum Einsatz.Of the Proportion of hard material particles can be between 0.5% by volume (volume percent) and 25 vol.%. Particularly preferred is a proportion of hard material particles between 1 vol.% and 5 vol.%.
Als Kunststoff-Basismaterial ist bevorzugt Polyamid (PA), insbesondere Polyamid mit 8 Vol.-% Polyethylen (PA 66 PE), Polyetheretherketon (PEEK) oder Polyoxymethylen (POM) vorgesehen. Das letztgenannte Material kommt häufig bevorzugt bei Linearlager-Käfigen zum Einsatz.When Plastic base material is preferably polyamide (PA), in particular Polyamide with 8% by volume of polyethylene (PA 66 PE), polyetheretherketone (PEEK) or polyoxymethylene (POM) provided. The latter Material comes often preferred for linear bearing cages for use.
Die Festigkeit des Käfigs kann dadurch weiter verbessert werden, dass er weiterhin Verstärkungsfasern aufweist. Hierfür kommen – wie an sich bekannt – insbesondere Kohlefasern oder Glasfasern in Frage.The Strength of the cage can be further improved by continuing to use reinforcing fibers having. Therefor come - like known in itself - in particular Carbon fibers or glass fibers in question.
Eine besonders bevorzugte Ausgestaltung sieht vor, dass bei der Verwendung von Polyamid (PA) als Kunststoff-Basismaterial Hartstoffteilchen in Form einer Oxidkeramik in einer Menge zwischen 1 und 5 Vol.-% enthalten sind.A particularly preferred embodiment provides that in use of polyamide (PA) as plastic base material hard material particles in the form of an oxide ceramic in an amount between 1 and 5 vol.% are included.
Eine besonders bevorzugte Alternative stellt darauf ab, dass bei der Verwendung von Polyetheretherketon (PEEK) als Kunststoff-Basismaterial Hartstoffteilchen in Form einer Oxidkeramik in einer Menge zwischen 15 und 25 Vol.-% enthalten sind.A particularly preferred alternative is that at the Use of polyetheretherketone (PEEK) as plastic base material Hard material particles in the form of an oxide ceramic in an amount between 15 and 25 vol .-% are included.
Der Käfig wird bevorzugt bei Kugellagern oder bei Kegelrollen-, Zylinderrollen-, Pendelrollen- oder Toroidallagern eingesetzt, wobei er aber auch für alle anderen Lagertypen verwendbar ist.Of the Cage is preferred for ball bearings or tapered roller, cylindrical roller, Spherical roller or Toroidallagern used, but he also for all others Storage types is usable.
Es sei darauf hingewiesen, dass bei der vorliegenden Erfindung die Mengenangaben der zuzugebenden Stoffe auf Volumenprozent bezogen sind; es hat sich herausgestellt, dass der Volumenanteil des zuzugebenden Stoffes mit Blick auf den Verschleiß und die Härte des Käfigmaterials relevanter ist als die im Stand der Technik bekannte Bezugnahme auf Gewichtsprozent.It It should be noted that in the present invention the Quantities of the substances to be added based on volume percent are; it has been found that the volume fraction of the added Material with regard to the wear and the hardness of the cage material is more relevant as the prior art reference to weight percent.
Der Einsatz von Nanopartikeln als solche sind im Stand der Technik bekannt, was auch für die entsprechende Verarbeitung bzw. Herstellung der Materialien gilt.Of the Use of nanoparticles as such are known in the art, which also for the corresponding processing or production of the materials applies.
Aus
der
Aus
der
Die
Schließlich sind
aus der
Auf die genannten Vorveröffentlichungen wird hinsichtlich der Herstellung und Verarbeitung von Materialien mit Nanopartikeln sowie mit Blick auf die Art der Nanopartikel hiermit ausdrücklich Bezug genommen.On the aforementioned prior publications will with regard to the production and processing of materials with Nanoparticles and with regard to the type of nanoparticles hereby expressly Referenced.
Mit der oben erläuterten erfindungsgemäßen Ausgestaltung wird eine Lebensdauer- und Leistungssteigerung bei Kunststoff-Wälzlagerkäfigen erreicht. Ferner können die Produktionskosten nicht unerheblich reduziert werden. Durch die Zumischung von Hartstoffteilchen in Nanopulverform zum Kunststoff-Basiswerkstoff wird erreicht, dass ein Teil des Käfigwerkstoffs durch die Nano-Hartstoffteilchen ersetzt wird, was Kostenvorteile insbesondere dann erbringen kann, wenn das Kunststoff-Basismaterial relativ teuer ist, wie es beispielsweise bei PEEK der Fall ist.With the above explained inventive design a life and performance increase in plastic rolling bearing cages is achieved. Furthermore, can the production costs are not reduced significantly. By the addition of hard particles in nanopowder form to the plastic base material is achieved that part of the cage material through the nano-hard particles which can provide cost benefits especially if the plastic base material is relatively expensive, such as for example PEEK is the case.
Bezüglich der Herstellung des Käfigs sei angemerkt, dass eine bevorzugte Verfahrensweise darin besteht, dass Hartstoffteilchen in Form eines Pulvers mit dem genannten mittleren Partikeldurchmesser, vorzugsweise zwischen 10 nm und 30 nm, dem im flüssigen Zustand (als pastöse Masse) vorliegenden Kunststoff-Basismaterial zugemischt wird, bis eine homogenen Mischung vorliegt. Dies erfolgt in bekannten Kunststoff-Verarbeitungsanlagen, d. h. insbesondere in einer Extrudiervorrichtung. Für das Einbringen der Nanopartikel in die Kunststoffmasse sind Dosierförderschnecken geeignet, die eine gleichmäßige Partikelverteilung begünstigen und Agglomerationen behindern. Anschließend kann eine (Re-)Granulierung des Kunststoffmaterials als Vorbereitung der thermoplastischen Formgebung, z. B. durch Spritzgießen, erfolgen, was in üblicher Weise stattfinden kann. Es kann dabei auf bestehende Anlagen zur Kunststoffverarbeitung problemlos zurückgegriffen werden; ggf. erforderliche Zusatzaggregate (z. B. zusätzliche Dosier- und Zumischeinrichtungen) können problemlos an bestehenden Anlagen ergänzt werden.Regarding the Production of the cage It should be noted that a preferred procedure is that hard material particles in the form of a powder with said middle Particle diameter, preferably between 10 nm and 30 nm, the im liquid Condition (as pasty Mass) present plastic base material is mixed until a homogeneous mixture is present. This takes place in known plastic processing plants, d. H. in particular in an extrusion device. For the introduction The nanoparticles in the plastic compound are dosing screw conveyors suitable, the uniform particle distribution favor and impede agglomerations. Subsequently, a (re-) granulation the plastic material in preparation of the thermoplastic molding, z. By injection molding, what happens in usual Way can take place. It can be applied to existing facilities for Plastic processing can be used easily; possibly required Additional units (eg additional Dosing and Zumischeinrichtungen) can easily on existing Attachments are added.
Durch die eingebrachten Nanopartikel aus dem genannten Hartstoff wird die Härte des Käfigs erhöht und auch der Verschleißwiderstand des Käfigs verbessert. Ferner wird die Temperaturbeständigkeit gesteigert. Gute Ergebnisse, d. h. eine Verbesserung der mechanischen Eigenschaften des Käfigs, können bereits mit Volumenanteilen zwischen 1 Vol.-% und 5 Vol.-% Hartstoffteilchen erreicht werden.By the introduced nanoparticles from the said hard material is the hardness of the cage increases and also the wear resistance of the cage improved. Furthermore, the temperature resistance is increased. Good results, d. H. An improvement in the mechanical properties of the cage, can already with volume fractions between 1 vol .-% and 5 vol .-% hard material particles be achieved.
Im Falle relativ teurer Kunststoffe haben sich jedoch auch höhere Gehalte an Nanopartikeln bis ca. 20 Vol.-% bewährt. Das Käfig-Grundmaterial kann damit verstreckt werden, so dass die Materialkosten insgesamt niedriger ausfallen.in the Traps of relatively expensive plastics, however, also have higher contents proven to nanoparticles up to about 20 vol .-%. The cage base material can handle it be stretched, so that the material costs lower overall fail.
Es sei angemerkt, dass der vorgeschlagene Wälzlagerkäfig freilich sowohl in den bevorzugten, genannten Lagertypen als auch bei Linearlagern eingesetzt werden kann.It It should be noted that the proposed rolling bearing cage admittedly in both the preferred, mentioned bearing types used as well as linear bearings can be.
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005051914A DE102005051914B4 (en) | 2005-10-29 | 2005-10-29 | Cage for a rolling bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005051914A DE102005051914B4 (en) | 2005-10-29 | 2005-10-29 | Cage for a rolling bearing |
Publications (2)
Publication Number | Publication Date |
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DE102005051914A1 true DE102005051914A1 (en) | 2007-05-03 |
DE102005051914B4 DE102005051914B4 (en) | 2008-02-21 |
Family
ID=37912770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102005051914A Expired - Fee Related DE102005051914B4 (en) | 2005-10-29 | 2005-10-29 | Cage for a rolling bearing |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008022311A1 (en) | 2008-05-06 | 2009-11-12 | Schaeffler Kg | Cage for rolling elements of a bearing |
WO2011006856A3 (en) * | 2009-07-14 | 2011-03-31 | Schaeffler Technologies Gmbh & Co. Kg | Injection-moulded rolling bearing cage made from fibre-reinforced thermoplastic plastics |
DE102011006031A1 (en) * | 2011-03-24 | 2012-09-27 | Aktiebolaget Skf | Segment for cage for roller bearing, comprises integral reinforcing element made of reinforcing material, and segment body, which is made of more than fifty volume percentage of injection-moldable plastic material |
DE102013218337A1 (en) * | 2013-09-12 | 2015-03-12 | Krones Aktiengesellschaft | Transport device and method for transporting plastic containers or preforms |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102012217405A1 (en) | 2012-09-26 | 2014-03-27 | Schaeffler Technologies Gmbh & Co. Kg | Medium-lubricated rolling bearing used as e.g. pump storage, has cage which guides rolling elements, and is made up of polyoxymethylene copolymer to which long or short-fiber reinforcements and filler additives are added |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102008022311A1 (en) | 2008-05-06 | 2009-11-12 | Schaeffler Kg | Cage for rolling elements of a bearing |
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WO2011006856A3 (en) * | 2009-07-14 | 2011-03-31 | Schaeffler Technologies Gmbh & Co. Kg | Injection-moulded rolling bearing cage made from fibre-reinforced thermoplastic plastics |
DE102011006031A1 (en) * | 2011-03-24 | 2012-09-27 | Aktiebolaget Skf | Segment for cage for roller bearing, comprises integral reinforcing element made of reinforcing material, and segment body, which is made of more than fifty volume percentage of injection-moldable plastic material |
DE102011006031B4 (en) * | 2011-03-24 | 2013-04-18 | Aktiebolaget Skf | Segment for a roller bearing cage and method for its production |
DE102013218337A1 (en) * | 2013-09-12 | 2015-03-12 | Krones Aktiengesellschaft | Transport device and method for transporting plastic containers or preforms |
US9969117B2 (en) | 2013-09-12 | 2018-05-15 | Krones Ag | Transport device and method for transporting plastic containers or preforms |
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