EP1384523A1 - Process for continuously and chromate free coating a pipe in a fluidized bed - Google Patents
Process for continuously and chromate free coating a pipe in a fluidized bed Download PDFInfo
- Publication number
- EP1384523A1 EP1384523A1 EP03012962A EP03012962A EP1384523A1 EP 1384523 A1 EP1384523 A1 EP 1384523A1 EP 03012962 A EP03012962 A EP 03012962A EP 03012962 A EP03012962 A EP 03012962A EP 1384523 A1 EP1384523 A1 EP 1384523A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- pipe
- tube
- primer
- induction coil
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
- B05D1/24—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
- B05D3/0245—Pretreatment, e.g. heating the substrate with induction heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0281—After-treatment with induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0426—Cooling with air
Definitions
- the object of the invention was to provide a new method which is continuous Chrome-free pipe coating enables.
- Process for the continuous coating of Pipes are already known.
- the magazine "Kunststoffe", Volume 57, Issue 1, Pages 21-24 described a process by which pipes with PVC by vortex sintering be coated, however, it does not have good adhesion values and homogeneous Layer thickness distributions received. It cannot be the essential ones Meet the requirements of the automotive industry.
- the tubes are heated by medium frequency induction. Approximation formulas for the Demand for electrical energy, the coating performance of such a system and the Powder requirements are specified.
- pipe pieces can be made in a desired Length coupled into an endless strand and in the horizontal continuous process be coated on the outside with plastic powder.
- Polyamide powders are particularly suitable, especially based on polyamide 11 and polyamide 12. Powders can be used manufactured according to DE 29 06 647 (Hüls AG), with the trade name VESTOSINT (Degussa AG) Process particularly well, because they are a special due to the production in the precipitation process achieve a round grain shape.
- Adhesion promoter applied. All common types for polymers are suitable as primers, especially those for polyamides. They can be in solution, suspension or Powder form can be applied. They are particularly suitable for VESTOSINT VESTOSINT coordinated adhesion promoter. With a solvent-based adhesion promoter a solids content of approx. 8% is used, then the layer thickness of the vented primer is between 5 and 8 ⁇ m. The method according to the invention can be used uniformly Achieve layer thicknesses of 50 to 1,000 ⁇ m. Layer thicknesses of 50 to 300 are preferred ⁇ m, with the inventive method fluctuations of ⁇ 30% can be achieved can. A commercially available adhesion promoter (e.g. VESTOSINT adhesion promoter WS 5) applied. The layer thickness of the vented primer typically is between 5 and 8 microns. Becomes a solvent-based adhesion promoter used, this usually has a solids content of about 8%.
- the tubes produced using the method according to the invention are particularly suitable as Hydraulic and brake lines for e.g. the automotive industry.
- the medium frequency induction heating was chosen because it was a continuous process heating method that is easy to regulate and very quick, using the Another advantage is that the induction coil, which heats the tube through it, directly in the swirling powder can be arranged and there is no loss of heat. at 10,000 Hz and a tube wall thickness of 2 mm, heating at 300 ° C takes 1 s. at heating is even possible at lower frequencies because of the greater depth of penetration faster in front of you, at 2,000 Hz the time would only be 0.73 s for the same conditions.
- the induction coil is designed as a coiled tube and cooling water flows through it; she remains cold, just like the powder.
- the generator system consists of the machine generator, which generates the high frequency, the control cabinet with control panel, the capacitor bank and the induction coil.
- the throughput speed (feed) of the pipes depends on the pipe diameter and wall thickness, i.e. on the weight of the pipe per unit length, and on the generator power.
- the generator efficiency and the required heating of the pipe also play an important role. Since these last-mentioned influencing variables can, however, be regarded as constant or at least not very variable in a first consideration, corresponding mean numerical values can be assumed.
- N G ⁇ c p .delta.t 860 ⁇
- N the generator power in kW
- G the continuous pipe weight in kg / h
- cp the specific heat of steel ( ⁇ 0.12 kcal / kg grd.)
- ⁇ t the required temperature increase of the pipe
- ⁇ the overall efficiency of the generator system (approx. 0.6 to 0.75).
- the throughput speed V max in m / min, the generator power N in kW, the pipe outer diameter d a in mm and the pipe wall thickness s are also to be used in mm.
- the pipe coating system (Fig. 01) consists of:
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- General Induction Heating (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
Beschichtete Rohre für die Automobilindustrie werden bisher mittels Verwendung von Chrom VI-Verbindungen (Chromate) hergestellt. Chromate werden gebraucht, um beim bisher angewendeten Extrusionsverfahren sehr gute Haftwerte zu erzielen. Dazu werden chromatierte Rohre eingesetzt, auch Aluminiumrohre werden chromatiert, Stahlrohre werden zunächst aluminiert, bevor diese dann chromatiert werden. Ab dem Jahre 2003 werden jedoch von der Automobilindustrie chromfreie Rohre gefordert.Coated pipes for the automotive industry have so far been made using chrome VI compounds (chromates) produced. Chromates are needed to date to achieve very good adhesion values in the extrusion process used. To do this, chromate Tubes are used, aluminum tubes are also chromated, steel tubes are initially aluminized before they are chromated. From 2003, however, the Automotive industry demands chrome-free pipes.
Aufgabe der Erfindung war es, ein neues Verfahren bereitzustellen, welches die kontinuierliche
chromfreie Rohrbeschichtung ermöglicht. Verfahren zur kontinuierlichen Beschichtung von
Rohren sind bereits bekannt. So wird in der Zeitschrift "Kunststoffe", 57. Jahrgang, Heft 1,
Seite 21-24 ein Verfahren beschrieben, mit dem Rohre mit PVC durch Wirbelsintern
beschichtet werden, allerdings wird darin nicht auf gute Haftwerte und homogene
Schichtdickenverteilungen eingegangen. Es lassen sich damit nicht die wesentlichen
Anforderungen der Automobilindustrie erfüllen.The object of the invention was to provide a new method which is continuous
Chrome-free pipe coating enables. Process for the continuous coating of
Pipes are already known. For example, in the magazine "Kunststoffe", Volume 57,
Die Nachteile des Standes der Technik, insbesondere die Haftwerte und die Schichtdickenverteilung, auch bei dünnen Schichten (120 - 150 µm) konnten nun mit einem Verfahren gemäß den Patentansprüchen überwunden werden.The disadvantages of the prior art, in particular the adhesion values and the Layer thickness distribution, even with thin layers (120 - 150 µm) could now be done with one Process according to the claims to be overcome.
Die Anlage arbeitet bevorzugt automatisch und kontinuierlich und dient zur
Außenbeschichtung von Rohren durch Wirbelsintern. Sie besteht aus den folgenden Teilen:
Je nach gewünschter Schichtdicke lassen sich die Induktionsspulen unter 5, 6 und 8 in
unterschiedlicher Kombination und Leistung betreiben. Folgende Möglichkeiten des
Induktionsspulen-Einsatzes sind dabei gegeben:
Die Rohre werden jeweils durch Mittelfrequenzinduktion erwärmt. Näherungsformeln für den
Bedarf an elektrischer Energie, die Beschichtungsleistung einer solchen Anlage sowie der
Pulverbedarf werden angegeben. Mit dem Verfahren können Rohrstücke in einer gewünschten
Länge zu einem endlosen Strang zusammengekoppelt und im horizontalen Durchlaufverfahren
mit Kunststoffpulver außenbeschichtet werden. Als Beschichtungsmittel eignen sich
wirbelfähige, schmelzbare Polymere oder Gemische daraus. Besonders geeignet sind Polyamid-Pulver,
insbesondere auf Basis von Polyamid 11 und Polyamid 12. Dabei lassen sich Pulver
hergestellt nach DE 29 06 647 (Hüls AG), mit dem Handelsnamen VESTOSINT (Degussa AG)
besonders gut verarbeiten, da sie aufgrund der Herstellung im Fällverfahren eine besonders
runde Kornform erreichen. Auf die Rohroberfläche wird zunächst ein handelsüblicher
Haftvermittler aufgetragen. Als Primer eignen sich dabei alle gängigen Typen für Polymere,
insbesondere diejenigen für Polyamide. Sie können sowohl in Lösung, Suspension oder
Pulverform aufgetragen werden. Besonders geeignet für VESTOSINT sind die speziell auf
VESTOSINT abgestimmten Haftvermittler. Wird ein lösemittelhaltiger Haftvermittler mit
einem Feststoffgehalt von ca. 8 % eingesetzt, so liegt die Schichtdicke des abgelüfteten Primers
zwischen 5 und 8 µm. Mit dem erfindungsgemäßen Verfahren lassen sich einheitliche
Schichtdicken von 50 bis 1 000 µm erzielen. Bevorzugt werden Schichtdicken von 50 bis 300
µm, wobei mit dem erfindungsgemäßen Verfahren Schwankungen von ± 30 % erreicht werden
können. Auf die Rohroberfläche wird zunächst ein handelsüblicher Haftvermittler (z.B.
VESTOSINT Haftvermittler WS 5) aufgetragen. Die Schichtdicke des abgelüfteten Primers
typischerweise liegt zwischen 5 und 8 µm. Wird ein lösemittelhaltiger Haftvermittler
eingesetzt, hat dieser in der Regel einen Feststoffgehalt von ca. 8 %.The tubes are heated by medium frequency induction. Approximation formulas for the
Demand for electrical energy, the coating performance of such a system and the
Powder requirements are specified. With the method, pipe pieces can be made in a desired
Length coupled into an endless strand and in the horizontal continuous process
be coated on the outside with plastic powder. Are suitable as coating agents
swirlable, meltable polymers or mixtures thereof. Polyamide powders are particularly suitable,
especially based on
Die mit dem erfindungsgemäßen Verfahren hergestellten Rohre eignen sich besonders als Hydraulik- und Bremsleitungen für z.B. die Automobilindustrie.The tubes produced using the method according to the invention are particularly suitable as Hydraulic and brake lines for e.g. the automotive industry.
Das erfindungsgemäße Verfahren soll im Folgenden näher beschrieben werden. The method according to the invention will be described in more detail below.
Die Mittelfrequenz-Induktionserwärmung wurde gewählt, weil es eine im Durchlaufverfahren bequem regulierbare und noch dazu sehr rasche Erwärmungsmethode ist, bei der man den weiteren Vorteil hat, dass die Induktionsspule, die das durchlaufende Rohr erwärmt, direkt im wirbelnden Pulver angeordnet werden kann und dadurch keine Wärmeverluste eintreten. Bei 10 000 Hz und einer Rohrwanddicke von 2 mm dauert das Erwärmen um 300 °C 1 s. Bei kleineren Frequenzen geht das Erwärmen wegen der größeren Eindringtiefe sogar noch schneller vor sich, bei 2 000 Hz würde die Zeit nur 0, 73 s für die gleichen Verhältnisse sein. Die Induktionsspule ist als Rohrwendel ausgeführt und wird von Kühlwasser durchströmt; sie bleibt ebenso wie das Pulver kalt. Die Generatoranlage besteht aus dem Maschinengenerator, der die hohe Frequenz erzeugt, dem Schaltschrank mit Schaltpult, der Kondensatorbatterie und der Induktionsspule. Vereinfacht kann man sich die Anlage als Transformator vorstellen, in dessen Primärseite elektrische Energie hoher Frequenz eingespeist wird und dessen Sekundärseite aus nur einer Windung, dem Werkstück, besteht. Die daraus resultierende sehr hohe Stromdichte im Sekundärkreis hat das rasche Erwärmen zur Folge. Bei durchlaufenden Werkstücken kommen nur solche mit gleichbleibendem Querschnitt und einheitlicher Wanddicke in Frage, z. B. rotationssymmetrische Gegenstände wie Drähte, Rohre, Stäbe u. dgl.The medium frequency induction heating was chosen because it was a continuous process heating method that is easy to regulate and very quick, using the Another advantage is that the induction coil, which heats the tube through it, directly in the swirling powder can be arranged and there is no loss of heat. at 10,000 Hz and a tube wall thickness of 2 mm, heating at 300 ° C takes 1 s. at heating is even possible at lower frequencies because of the greater depth of penetration faster in front of you, at 2,000 Hz the time would only be 0.73 s for the same conditions. The induction coil is designed as a coiled tube and cooling water flows through it; she remains cold, just like the powder. The generator system consists of the machine generator, which generates the high frequency, the control cabinet with control panel, the capacitor bank and the induction coil. Simplified, you can imagine the system as a transformer, in the primary side of which high-frequency electrical energy is fed in and Secondary side consists of only one turn, the workpiece. The resulting very high current density in the secondary circuit results in rapid heating. With continuous Workpieces only come with a constant cross-section and more uniform Wall thickness in question, e.g. B. rotationally symmetrical objects such as wires, pipes, rods and the like. like.
Die Durchlaufgeschwindigkeit (Vorschub) der Rohre hängt von Rohrdurchmesser und
Wanddicke, also vom Gewicht des Rohres pro Längeneinheit, sowie von der Generatorleistung
ab. Natürlich spielen auch der Generatorwirkungsgrad und die erforderliche Erwärmung des
Rohres eine wesentliche Rolle. Da diese letztgenannten Einflussgrößen jedoch in einer ersten
Betrachtung als konstant oder mindestens nicht sehr veränderlich angesehen werden können,
können entsprechende mittlere Zahlenwerte angenommen werden. Die erforderliche
Generatorleistung ist:
Mit einem 36-kW-Mittelfrequenz-Generator würde man also rd. 720 kg/h Stahlrohr um 240 °C erwärmen können. Dieser Rechenwert wurde im Beispiel bestätigt.With a 36 kW medium frequency generator you would have approx. 720 kg / h steel tube around 240 ° C can heat. This calculated value was confirmed in the example.
Für Überschlagsrechnungen gilt als ungefährer Anhaltswert für den Leistungsbedarf (bei den
vorliegenden und ähnlichen Verhältnissen):
Diese Faustformeln sind natürlich nicht dimensionsrichtig, weil dimensionsbehaftete Größen
(z.B. die spezifische Wärme cp mit ihrem Zahlenwert eingesetzt wurden. Trotzdem haben sich
solche dimensionsfalschen Gleichungen für Betriebsbelange als recht nützlich erwiesen.
Kombiniert man die Formeln für das durchlaufende Rohrgewicht mit der Formel für die
erforderliche Generatorleistung, so erhält man für Stahlrohre mit einem spezifischen Gewicht y
= 7 ,85 kg/dm3 eine einfache Beziehung für die größte Durchlaufgeschwindigkeit (Vorschub)
eines Rohres, die bei gegebener Generatorleistung möglich ist. Muss man z. B. auf einer
Rohrbeschichtungsanlage häufig Rohre verschiedener Durchmesser und Wanddicken
beschichten, so gibt die folgende Formel schnell einen Anhaltswert für die größte
Durchlaufgeschwindigkeit. Für andere Verhältnisse muss der Zahlenfaktor etwas verändert
werden:
Hierin ist die Durchlaufgeschwindigkeit Vmax in m/min, die Generatorleistung N in kW, der Rohraußendurchmesser da in mm und die Rohrwanddicke s ebenfalls in mm einzusetzen.The throughput speed V max in m / min, the generator power N in kW, the pipe outer diameter d a in mm and the pipe wall thickness s are also to be used in mm.
Die Rohrbeschichtungsanlage (Bild 01) besteht aus:The pipe coating system (Fig. 01) consists of:
Die Ergebnisse einer Versuchsreihe auf der beschriebenen Anlage sind in Tabelle 1
zusammengefasst. Für die Beispiele 1 bis 7 wurde jeweils Polyamid 12 Fällpulver vom Typ
VESTOSINT 2157 der Degussa AG eingesetzt. Bei allen angegebenen Beispielen fand keine
Vorbehandlung durch Chromatieren statt.
The results of a series of tests on the system described are summarized in Table 1. For Examples 1 to 7,
- Chemikalienbeständigkeit:
- nach TL 222 Punkt 5; keine Blasenbildung oder Erweichen der Kunststoffschicht aufgetreten Nach 24-stündigem Ablüften und anschließendem Wickeln um einen Dorn (360°) von 16 mm keine sichtbaren Risse oder folienartige Ablösungen des PA-Überzuges aufgetreten
- Chemical resistance:
- according to TL 222
point 5; No blistering or softening of the plastic layer occurred. After flashing off for 24 hours and then wrapping it around a mandrel (360 °) of 16 mm, no visible cracks or film-like detachments of the PA coating occurred
- 1
- Reinigungsanlage
- 2
- Antrieb 1
- 3
- Primerstation
- 4
- Induktion 1 (Spule I - Primertrocknung)
- 5
- Induktion 2 (Spule V - Primertrocknung)
- 6
- Radiallüfter 1
- 7
- Radiallüfter 2
- 8
- Antrieb 2
- 9
- Induktion 3 (Vorwärmung)
- 10
- Auflagerolle 1
- 11
- Wirbelsinterbecken inkl. Induktion 4
- 12
- Antrieb 3
- 13
- ROHR
- 14
- Abblasdüse
- 15
- Auflagerolle 2
- 16
- Wasserbecken
- 17
- Auflagerolle 3
- 18
- Auflagerolle 4
- 19
- Antrieb 4
- 20
- Antrieb 5 (Raupenabzug)
- 21
- Hacker
- 1
- purifier
- 2
-
Drive 1 - 3
- primer station
- 4
- Induction 1 (coil I - primer drying)
- 5
- Induction 2 (coil V - primer drying)
- 6
-
Radial fan 1 - 7
-
Radial fan 2 - 8th
-
Drive 2 - 9
- Induction 3 (preheating)
- 10
-
Support roll 1 - 11
- Vortex sintering
basin including induction 4 - 12
-
Drive 3 - 13
- PIPE
- 14
- Blow Off
- 15
-
Support roll 2 - 16
- water basin
- 17
-
Support roller 3 - 18
-
Support roller 4 - 19
-
Drive 4 - 20
- Drive 5 (caterpillar take-off)
- 21
- hacker
Claims (10)
dadurch gekennzeichnet, dass die 3 Induktionsspulen unter den Punkten 5, 6 und 8 in Abhängigkeit der Schichtdicke der Beschichtung wie folgt eingesetzt werden:
Einsatz der Induktionsspulen 5 und 8,
oder Einsatz der Induktionsspulen 5 und 6
oder Einsatz der Induktionsspulen 5, 6 und 8
oder Einsatz der Induktionsspule 6,
oder Einsatz der Induktionsspulen 6 und 8.Method according to claim 1,
characterized in that the 3 induction coils under points 5, 6 and 8 are used as follows depending on the layer thickness of the coating:
Use of induction coils 5 and 8,
or use of induction coils 5 and 6
or use of induction coils 5, 6 and 8
or use of induction coil 6,
or use of induction coils 6 and 8.
dadurch gekennzeichnet, dass als Beschichtungsmittel Polyamid eingesetzt wird.Method according to one of the preceding claims,
characterized in that polyamide is used as the coating agent.
dadurch gekennzeichnet, dass Polyamid 11 oder Polyamid 12 eingesetzt wird.Method according to one of the preceding claims,
characterized in that polyamide 11 or polyamide 12 is used.
dadurch gekennzeichnet, dass Polyamid 12 aus Fällpulver eingesetzt wird.Method according to one of the preceding claims,
characterized in that polyamide 12 is used from precipitation powder.
dadurch gekennzeichnet, dass ein handelsüblicher Haftvermittler in Form von Suspension, Lösung oder Pulver aufgetragen wird.Method according to one of the preceding claims,
characterized in that a commercially available adhesion promoter is applied in the form of a suspension, solution or powder.
dadurch gekennzeichnet, dass die Polymerschicht 50 bis 1 000 µm beträgt und die mittlere Abweichung 30 % nicht übersteigt.Method according to one of the preceding claims,
characterized in that the polymer layer is 50 to 1000 µm and the mean deviation does not exceed 30%.
dadurch gekennzeichnet, dass die Polymerschicht 50 bis 300 µm beträgt und die mittlere Abweichung 30 % nicht übersteigt. Method according to one of the preceding claims,
characterized in that the polymer layer is 50 to 300 µm and the mean deviation does not exceed 30%.
dadurch gekennzeichnet, dass die Polymerschicht 50 bis 300 µm beträgt und die mittlere Abweichung 20 % nicht übersteigt.Method according to one of the preceding claims,
characterized in that the polymer layer is 50 to 300 µm and the average deviation does not exceed 20%.
dadurch gekennzeichnet, dass auf dem Rohr eine Primerschicht aufgebracht wurde und ein wirbelfähiges, schmelzfähiges Polymer im Wirbelsinterverfahren aufgebracht wurde.Chromate-free coated pipes,
characterized in that a primer layer was applied to the tube and a swirlable, meltable polymer was applied in the vortex sintering process.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10233345 | 2002-07-23 | ||
DE10233345A DE10233345A1 (en) | 2002-07-23 | 2002-07-23 | Continuous chromate-free pipe coatings by fluidized bed sintering |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1384523A1 true EP1384523A1 (en) | 2004-01-28 |
EP1384523B1 EP1384523B1 (en) | 2005-08-17 |
Family
ID=29796511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03012962A Expired - Lifetime EP1384523B1 (en) | 2002-07-23 | 2003-06-07 | Process for continuously and chromate free coating a pipe in a fluidized bed |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP1384523B1 (en) |
JP (1) | JP4360856B2 (en) |
KR (1) | KR20040010311A (en) |
CN (1) | CN100509178C (en) |
AT (1) | ATE302069T1 (en) |
BR (1) | BR0302592A (en) |
CA (1) | CA2435690A1 (en) |
DE (2) | DE10233345A1 (en) |
ES (1) | ES2246443T3 (en) |
MX (1) | MXPA03006198A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2236217A1 (en) | 2009-04-02 | 2010-10-06 | Babcock Borsig Service GmbH | Method and device for coating metallic tubes or other long components with limited cross-section |
Families Citing this family (5)
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DE102012101651A1 (en) * | 2012-02-29 | 2013-08-29 | Thyssenkrupp Rothe Erde Gmbh | Method for producing a roller bearing cage for an axial-radial roller bearing and axial-radial roller bearing |
DE102012101649A1 (en) * | 2012-02-29 | 2013-08-29 | Thyssenkrupp Rothe Erde Gmbh | Method for producing a roller bearing cage, in particular for slewing bearings, and device for carrying out the method |
IT201700047436A1 (en) * | 2017-05-03 | 2018-11-03 | Ima Spa | Method for coating bulk material |
CN110076059B (en) * | 2019-03-18 | 2021-11-05 | 北京丰隆汇技术有限公司 | Snap spring hanging point powder supplementing method |
CN112893061B (en) * | 2021-01-18 | 2022-02-25 | 南京和涛塑胶有限公司 | Production process of N-HAP hot-dip plastic steel pipe |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3108022A (en) * | 1960-05-09 | 1963-10-22 | Polymer Processes Inc | Apparatus for coating an elongate body with fluidized coating material |
US3560239A (en) * | 1964-03-25 | 1971-02-02 | United States Steel Corp | Method of coating an elongated body |
Family Cites Families (1)
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---|---|---|---|---|
CN1288125C (en) * | 2003-01-16 | 2006-12-06 | 张小燕 | Method of preparing calcium propionate using egg shell |
-
2002
- 2002-07-23 DE DE10233345A patent/DE10233345A1/en not_active Withdrawn
-
2003
- 2003-06-07 ES ES03012962T patent/ES2246443T3/en not_active Expired - Lifetime
- 2003-06-07 EP EP03012962A patent/EP1384523B1/en not_active Expired - Lifetime
- 2003-06-07 DE DE50300986T patent/DE50300986D1/en not_active Expired - Lifetime
- 2003-06-07 AT AT03012962T patent/ATE302069T1/en not_active IP Right Cessation
- 2003-07-10 MX MXPA03006198A patent/MXPA03006198A/en not_active Application Discontinuation
- 2003-07-21 BR BR0302592-6A patent/BR0302592A/en not_active IP Right Cessation
- 2003-07-21 CA CA002435690A patent/CA2435690A1/en not_active Abandoned
- 2003-07-22 KR KR1020030050140A patent/KR20040010311A/en not_active Application Discontinuation
- 2003-07-22 CN CNB031328474A patent/CN100509178C/en not_active Expired - Fee Related
- 2003-07-23 JP JP2003200680A patent/JP4360856B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3108022A (en) * | 1960-05-09 | 1963-10-22 | Polymer Processes Inc | Apparatus for coating an elongate body with fluidized coating material |
US3560239A (en) * | 1964-03-25 | 1971-02-02 | United States Steel Corp | Method of coating an elongated body |
Non-Patent Citations (1)
Title |
---|
GEMMER R: "Aussenbeschichten von Rohren mit PVC durch Wirbelsintern", KUNSTSTOFFE, vol. 57, no. Heft 1, 1967, pages 21 - 24, XP009018626 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2236217A1 (en) | 2009-04-02 | 2010-10-06 | Babcock Borsig Service GmbH | Method and device for coating metallic tubes or other long components with limited cross-section |
Also Published As
Publication number | Publication date |
---|---|
DE50300986D1 (en) | 2005-09-22 |
CN1488447A (en) | 2004-04-14 |
BR0302592A (en) | 2004-08-24 |
KR20040010311A (en) | 2004-01-31 |
CA2435690A1 (en) | 2004-01-23 |
CN100509178C (en) | 2009-07-08 |
EP1384523B1 (en) | 2005-08-17 |
ES2246443T3 (en) | 2006-02-16 |
JP4360856B2 (en) | 2009-11-11 |
JP2004105949A (en) | 2004-04-08 |
DE10233345A1 (en) | 2004-02-12 |
ATE302069T1 (en) | 2005-09-15 |
MXPA03006198A (en) | 2004-12-03 |
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