EP2027935A1 - Device for applying a suspension to a carrier plate - Google Patents

Device for applying a suspension to a carrier plate Download PDF

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Publication number
EP2027935A1
EP2027935A1 EP08013512A EP08013512A EP2027935A1 EP 2027935 A1 EP2027935 A1 EP 2027935A1 EP 08013512 A EP08013512 A EP 08013512A EP 08013512 A EP08013512 A EP 08013512A EP 2027935 A1 EP2027935 A1 EP 2027935A1
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EP
European Patent Office
Prior art keywords
slots
suspension
width
applicator
roller
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Granted
Application number
EP08013512A
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German (de)
French (fr)
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EP2027935B1 (en
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Flooring Technologies Ltd
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Flooring Technologies Ltd
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Priority to PL08013512T priority Critical patent/PL2027935T3/en
Publication of EP2027935A1 publication Critical patent/EP2027935A1/en
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Publication of EP2027935B1 publication Critical patent/EP2027935B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/086—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B05C1/0865—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith the cooperating element being a roller, e.g. a coating roller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]

Definitions

  • the invention relates to a device for applying a suspension mixed with abrasive particles, in particular corundum particles, to a carrier plate, wherein the device has an applicator roller and a metering roller cooperating with the applicator roller.
  • Such a device is for example from the DE 20 2004 018 710 known.
  • the suspension to be applied is applied to the rotating metering roller and applied by this to the applicator roll.
  • the amount of the transferring suspension is adjusted via a squeegee located on the dosing. From the applicator roll, the suspension is then applied to the surface of the carrier plate.
  • a disadvantage is that in the direction of rotation in front of the squeegee located on the metering roller, a reservoir of the suspension to be applied must be applied in order to ensure uniform over the entire width of the roll order. Therefore, there is always relatively much of the example corundum-containing suspension in the device, resulting in increased production costs.
  • the suspension has a relatively long residence time in the reservoir. At least some sedimentation of the solid particles contained in the suspension occurs. Thus, the suspension no longer has a homogeneous particle density, which leads to an irregular distribution of the particles on the support plate.
  • the invention has the object to improve a generic device such that a higher distribution accuracy of the suspension to be applied is ensured.
  • a generic device has a job trough (feed chute) with two laterally projecting, at an angle ⁇ to the horizontal downwardly inclined groove halves with bottom-side slots.
  • the two groove halves extend in the direction of the roll axes of the rolling mill and thus perpendicular to the direction of movement of the carrier plates, to which the suspension mixed with abrasive particles is to be applied. They thus stand laterally out of the imaginary central axis, in which, for example, a feeder can be located, out.
  • the suspension to be applied is introduced centrally from above into the order trough. Since the two gutter halves are sloping outward, the suspension distributes the gravity over the entire width of the order trough. Through the slots in the bottom of the order trough, the suspension can emerge down and is applied so evenly on the metering roller. A Reservoir upset on the roller itself is no longer necessary.
  • the order trough is provided with a central feed port.
  • the application trough extends over the entire width of the roll mill. This ensures a uniform application of the suspension to the metering roller.
  • the order trough preferably has a trapezoidal cross-section, with the short side of the trapezoid forming the bottom. This will be through the feed pipe introduced suspension fed optimally provided for in the bottom slots.
  • the side walls of the order trough are closed, so that no introduced suspension can escape here.
  • the side walls of the order trough are the walls that limit the order trough in the direction of flow of, for example, in the middle of the application trough suspension, ie in the direction of the roll axes.
  • the slots located at the bottom of the application channel have a variable width.
  • the width of the slots is defined as the extent of the slots perpendicular (transverse) to the direction of flow of the suspension in the order trough and thus perpendicular to the direction of the roll axes. It has proven to be advantageous that the width of the slots increases from the center of the application channel towards its edges. This ensures that the same amount of suspension is applied to the metering roller over the entire width of the application channel, without the need for a reservoir formation in the order trough would be necessary.
  • a predetermined amount of the suspension to be applied is introduced into the order trough. From this suspension, a small part passes through the relatively narrow slots in the middle of the order trough and passes directly to the metering roller. By far the largest part flows outwards along the inclined gutter halves. Outwardly, the amount of suspension present in the order trough steadily decreases. From this ever smaller amount of an increasing proportion must be derived down to ensure a homogeneous distribution on the below the order trough dosing. This is achieved by increasing the width of the slots towards the edge of the application trough.
  • the width of the slots increases from the center of the application channel towards the edge from 1 mm to 20 mm, particularly advantageously from 1 mm to 10 mm.
  • the width of the slots is infinitely adjustable. As a result, the optimum slot width can be set for any desired order quantity.
  • the angle ⁇ at which the two groove halves are inclined outwards is between 1 ° and 15 °. Particularly advantageous is an angle ⁇ of 5 ° has been found.
  • this angle of inclination the flow rate of the suspension to be applied can be controlled.
  • this angle is infinitely adjustable. In this case, depending on the viscosity and the amount of suspension to be applied, the optimum gradient angle can be set.
  • the surface of the metering roll and the applicator roll may be rubberized.
  • the Shore hardness of the rubber is 40 to 70, particularly preferably 55.
  • EPDM has been found to be suitable.
  • the surface of the metering roller may also be made of ceramic or chromed steel.
  • the metering roller is designed as an anilox roller.
  • the order quantity can be precisely metered, while maintaining high distribution accuracy.
  • Particularly suitable is a line or helical grinding pattern along the circumferential direction of the applicator roll has been found.
  • FIG. 1 a device according to the invention is shown in side view.
  • the applied to the support plate 2 suspension 1 exits in the bottom of the trough halves 6 located above the consisting of the metering roll 4 and the applicator roll 3 order trough slots 5 located 7 and is passed directly into the gap between the metering roll 4 and the applicator roll 3 ,
  • the adjustable width of the slots 7 and the adjustable angle ⁇ below which the gutter halves are inclined downwardly outwardly, the amount of the exiting suspension can be controlled.
  • the gap width between the two can be changed and thus the amount of the applied suspension 1 on the support plate 2 can be controlled again.
  • the surfaces of the applicator roller 3 and the metering roller 4 are coated in such a way that the suspension 1 to be applied remains adhered to the applicator roll 3. From this application roller 3, the suspension 1 is transferred to the support plate 2. This is in the enlarged section FIG. 1 clarified. By the arrows in the rollers, the respective direction of rotation is indicated. The enlarged section clearly shows that in the direction of rotation before the contact between applicator roll 3 and support plate 2, the suspension 1 to be applied adheres to the applicator roll 3. After contact, the suspension 1 has been transferred to the carrier plate 2.
  • FIG. 2 shows a perspective view of a device according to the invention.
  • the order trough 5, which is located above the gap between metering roller 4 and applicator roller 3, has two groove halves 6, which are inclined downwards starting from the middle - where a central feed nozzle 8 is also arranged.
  • In the bottom of this Gutter halves 6 are slots 7, which have from the center of the order trough 5 to the sides of increasing width. Through this occurs the suspension to be applied, the in FIG. 2 not shown off. Due to the trapezoidal cross-section of the two channel halves 6, the suspension 1, which is guided into the application channel 5 by the central feed port (not shown), is always directed to the slots 7.
  • Both the angle of inclination ⁇ of the trough halves 6 and the width of the slots 7 are infinitely adjustable so as to be able to optimally control the amount of the suspension which exits downwards as a function of its viscosity and the required application quantity.
  • the emerging from the order trough 5 suspension 1 is discharged directly into the gap between applicator roll 3 and metering roller 4. From the applicator roll 3, the suspension 1 is transferred to the support plate 2.
  • the suspension 1 consists of a melamine resin-corundum mixture and has a solid resin content of 50% to 70%, preferably 60%, wherein the melamine resin additives such as hardeners, wetting agents, release agents and leveling agents and defoamers are added, and also has a 30% to 60%, preferably 50%, content of corundum, for example aluminum oxide.
  • the corundum has a size of about 0 to 120 microns.
  • nanoparticles for example silicon carbide, can be introduced, which contribute to increasing the scratch resistance of the surface. In addition, less dirt and bacteria adhere to the surfaces equipped with nanoparticles.
  • coordinated rotation direction and speed of the metering roller 4 and the applicator roll 3 can be an amount of about 10 g / m 2 to 70 g / m 2 , preferably 50 g / m 2 apply.
  • the distribution accuracy is about 90%.
  • Both the applicator roller 3 and the metering roller 4 are provided with a rubberized surface.
  • the Shore hardness of the rubber of the surface is 40 to 50, preferably 55.
  • EPDM has been found to be suitable.
  • the surface of the applicator roll 3 is also provided with a fine grinding. As special Suitably, a line or a helical grinding pattern has emerged along the circumferential direction of the applicator roller 3. With an applicator roller designed in this way, the application quantity can be dosed particularly precisely, while maintaining distribution accuracy.
  • the surface of the metering roller 4 may also be made of ceramic or chromed steel.

Abstract

The device has a roller mill with an applicator roll (3) and a feed roll (4) that cooperates with the applicator roll. An applicator channel (5) with two laterally projecting and downwardly inclined channel halves (6) comprising base-side slots is arranged over the roller mill below an angle against a horizontal. The applicator channel extends over complete width of the roller mill, where cross section of the applicator channel is trapezoid shaped. Side walls of the applicator channel are closed designed.

Description

Die Erfindung betrifft eine Vorrichtung zum Auftragen einer mit abrasiven Partikeln, insbesondere Korundpartikeln, versetzten Suspension auf eine Trägerplatte, wobei die Vorrichtung eine Auftragswalze und eine mit der Auftragswalze zusammenwirkende Dosierwalze aufweist.The invention relates to a device for applying a suspension mixed with abrasive particles, in particular corundum particles, to a carrier plate, wherein the device has an applicator roller and a metering roller cooperating with the applicator roller.

Eine derartige Vorrichtung ist beispielsweise aus der DE 20 2004 018 710 bekannt. Die aufzutragende Suspension wird dabei auf die rotierende Dosierwalze aufgetragen und von dieser auf die Auftragswalze aufgebracht. Die Menge der übertragenden Suspension wird dabei über eine an der Dosierachse befindliche Rakel eingestellt. Von der Auftragswalze wird die Suspension dann auf die Oberfläche der Trägerplatte aufgebracht.Such a device is for example from the DE 20 2004 018 710 known. The suspension to be applied is applied to the rotating metering roller and applied by this to the applicator roll. The amount of the transferring suspension is adjusted via a squeegee located on the dosing. From the applicator roll, the suspension is then applied to the surface of the carrier plate.

Nachteilig ist, dass in Drehrichtung vor der an der Dosierwalze befindlichen Rakel ein Reservoir der aufzutragenden Suspension angelegt werden muss, um einen über die gesamte Walzenbreite gleichmäßigen Auftrag zu gewährleisten. Daher ist immer relativ viel der beispielsweise korundhaltigen Suspension in der Vorrichtung vorhanden, was zu erhöhten Produktionskosten führt. Außerdem hat die Suspension eine relativ lange Verweildauer in dem Reservoir. Dabei kommt es zumindest teilweise zu einer Sedimentation der in der Suspension enthaltenen festen Partikel. Damit hat die Suspension keine homogene Partikeldichte mehr, was zu einer unregelmäßigen Verteilung der Partikel auf der Trägerplatte führt.A disadvantage is that in the direction of rotation in front of the squeegee located on the metering roller, a reservoir of the suspension to be applied must be applied in order to ensure uniform over the entire width of the roll order. Therefore, there is always relatively much of the example corundum-containing suspension in the device, resulting in increased production costs. In addition, the suspension has a relatively long residence time in the reservoir. At least some sedimentation of the solid particles contained in the suspension occurs. Thus, the suspension no longer has a homogeneous particle density, which leads to an irregular distribution of the particles on the support plate.

Von dieser Problemstellung liegt der Erfindung die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung derart zu verbessern, dass eine höhere Verteilgenauigkeit der aufzutragenden Suspension gewährleistet ist.From this problem, the invention has the object to improve a generic device such that a higher distribution accuracy of the suspension to be applied is ensured.

Zur Problemlösung der gestellten Aufgabe zeichnet sich eine gattungsgemäße Vorrichtung dadurch aus, dass sie eine Auftragsrinne (Zuführrinne) mit zwei seitlich hervorstehenden, unter einem Winkel α gegen die Horizontale nach unten geneigten Rinnenhälften mit bodenseitigen Schlitzen aufweist. Die beiden Rinnenhälften erstrecken sich in Richtung der Walzenachsen des Walzwerkes und damit senkrecht zur Bewegungsrichtung der Trägerplatten, auf die die mit abrasiven Partikeln versetzte Suspension aufzutragen ist. Sie stehen somit seitlich aus der gedachten Mittelachse, in der sich beispielsweise eine Zuführeinrichtung befinden kann, hervor. Durch den Zuführstutzen wird die aufzutragende Suspension zentral von oben in die Auftragsrinne eingeleitet. Da die beiden Rinnenhälften nach außen abfallend ausgebildet sind, verteilt sich die Suspension der Schwerkraft folgend über die gesamte Breite der Auftragsrinne. Durch die Schlitze im Boden der Auftragsrinne kann die Suspension nach unten austreten und wird so gleichmäßig auf die Dosierwalze aufgetragen. Eine Reservoirbildung auf der Walze selbst ist damit nicht mehr nötig.To solve the problem, a generic device is characterized in that it has a job trough (feed chute) with two laterally projecting, at an angle α to the horizontal downwardly inclined groove halves with bottom-side slots. The two groove halves extend in the direction of the roll axes of the rolling mill and thus perpendicular to the direction of movement of the carrier plates, to which the suspension mixed with abrasive particles is to be applied. They thus stand laterally out of the imaginary central axis, in which, for example, a feeder can be located, out. Through the feed nozzle, the suspension to be applied is introduced centrally from above into the order trough. Since the two gutter halves are sloping outward, the suspension distributes the gravity over the entire width of the order trough. Through the slots in the bottom of the order trough, the suspension can emerge down and is applied so evenly on the metering roller. A Reservoirbildung on the roller itself is no longer necessary.

Vorzugsweise ist die Auftragsrinne mit einem zentralen Zuführstutzen versehen.Preferably, the order trough is provided with a central feed port.

Vorteilhafterweise erstreckt sich die Auftragsrinne über die gesamte Breite des Walzenwerks. Damit ist ein gleichmäßiger Auftrag der Suspension auf die Dosierwalze gewährleistet.Advantageously, the application trough extends over the entire width of the roll mill. This ensures a uniform application of the suspension to the metering roller.

Die Auftragsrinne weist vorzugsweise einen trapezförmigen Querschnitt auf, wobei die kurze Seite des Trapezes den Boden bildet. Dadurch wird die durch den Zuführstutzen eingeleitete Suspension optimal den im Boden vorgesehenen Schlitzen zugeleitet.The order trough preferably has a trapezoidal cross-section, with the short side of the trapezoid forming the bottom. This will be through the feed pipe introduced suspension fed optimally provided for in the bottom slots.

Die Seitenwände der Auftragsrinne sind geschlossen ausgebildet, sodass hier keine eingeleitete Suspension austreten kann. Die Seitenwände der Auftragsrinne sind die Wände, die die Auftragsrinne in Fließrichtung der beispielsweise in der Mitte der Auftragsrinne eingeleiteten Suspension, also in Richtung der Walzenachsen, begrenzen.The side walls of the order trough are closed, so that no introduced suspension can escape here. The side walls of the order trough are the walls that limit the order trough in the direction of flow of, for example, in the middle of the application trough suspension, ie in the direction of the roll axes.

Vorzugsweise weisen die am Boden der Auftragsrinne befindlichen Schlitze eine variable Breite auf. Als Breite der Schlitze ist dabei die Ausdehnung der Schlitze senkrecht (quer) zur Fliesrichtung der Suspension in der Auftragsrinne und damit auch senkrecht zur Richtung der Walzenachsen definiert. Als vorteilhaft hat sich herausgestellt, dass die Breite der Schlitze von der Mitte der Auftragsrinne zu ihren Rändern hin zunimmt. Dadurch ist gewährleistet, dass über die gesamte Breite der Auftragsrinne die gleiche Menge Suspension auf die Dosierwalze aufgetragen wird, ohne dass dafür eine Reservoirbildung in der Auftragsrinne notwendig wäre.Preferably, the slots located at the bottom of the application channel have a variable width. The width of the slots is defined as the extent of the slots perpendicular (transverse) to the direction of flow of the suspension in the order trough and thus perpendicular to the direction of the roll axes. It has proven to be advantageous that the width of the slots increases from the center of the application channel towards its edges. This ensures that the same amount of suspension is applied to the metering roller over the entire width of the application channel, without the need for a reservoir formation in the order trough would be necessary.

In der Mitte der Auftragsrinne wird eine zuvor festgelegte Menge der aufzutragenden Suspension in die Auftragsrinne eingeleitet. Von dieser Suspension tritt ein kleiner Teil durch die relativ engen Schlitze in der Mitte der Auftragsrinne aus und gelangt direkt auf die Dosierwalze. Der weitaus größte Teil fließt entlang der geneigten Rinnenhälften nach außen. Nach außen hin nimmt die Menge der in der Auftragsrinne vorhandenen Suspension stetig ab. Von dieser immer geringeren Menge muss ein immer größerer Anteil nach unten abgeleitet werden, um eine homogene Verteilung auf der unter der Auftragsrinne liegenden Dosierwalze zu gewährleisten. Dies wird dadurch erreicht, dass die Breite der Schlitze zum Rand der Auftragsrinne hin zunimmt.In the middle of the order trough a predetermined amount of the suspension to be applied is introduced into the order trough. From this suspension, a small part passes through the relatively narrow slots in the middle of the order trough and passes directly to the metering roller. By far the largest part flows outwards along the inclined gutter halves. Outwardly, the amount of suspension present in the order trough steadily decreases. From this ever smaller amount of an increasing proportion must be derived down to ensure a homogeneous distribution on the below the order trough dosing. This is achieved by increasing the width of the slots towards the edge of the application trough.

Vorteilhafterweise nimmt die Breite der Schlitze von der Mitte der Auftragsrinne zum Rand hin von 1 mm auf 20 mm, besonders vorteilhafterweise von 1 mm auf 10 mm, zu. Vorzugsweise ist die Breite der Schlitze stufenlos einstellbar. Dadurch kann für jede gewünschte Auftragsmenge die optimale Schlitzbreite eingestellt werden.Advantageously, the width of the slots increases from the center of the application channel towards the edge from 1 mm to 20 mm, particularly advantageously from 1 mm to 10 mm. Preferably, the width of the slots is infinitely adjustable. As a result, the optimum slot width can be set for any desired order quantity.

Vorteilhafterweise beträgt der Winkel α, unter dem die beiden Rinnenhälften nach außen hin geneigt sind, zwischen 1° und 15°. Als besonders vorteilhaft hat sich ein Winkel α von 5° erwiesen. Durch diesen Neigungswinkel kann die Fließgeschwindigkeit der aufzutragenden Suspension gesteuert werden. Vorzugsweise ist dieser Winkel stufenlos einstellbar. In diesem Fall kann in Abhängigkeit der Viskosität und der aufzutragenden Menge der Suspension der optimale Gefällewinkel eingestellt werden.Advantageously, the angle α at which the two groove halves are inclined outwards is between 1 ° and 15 °. Particularly advantageous is an angle α of 5 ° has been found. By this angle of inclination, the flow rate of the suspension to be applied can be controlled. Preferably, this angle is infinitely adjustable. In this case, depending on the viscosity and the amount of suspension to be applied, the optimum gradient angle can be set.

Die Oberfläche der Dosierwalze und der Auftragswalze können gummiert sein. Vorzugsweise beträgt die Shore-Härte des Gummis 40 bis 70, insbesondere vorzugsweise 55. Als Gummi hat sich EPDM als geeignet herausgestellt.The surface of the metering roll and the applicator roll may be rubberized. Preferably, the Shore hardness of the rubber is 40 to 70, particularly preferably 55. As rubber, EPDM has been found to be suitable.

Alternativ kann die Oberfläche der Dosierwalze auch aus Keramik oder verchromtem Stahl bestehen. Vorzugsweise ist die Dosierwalze als Rasterwalze ausgeführt. Mittels eines aus Näpfchen bestimmter Größe bestehenden Rasters lässt sich die Auftragsmenge pro Fläche noch besser steuern. Die Größe der Näpfchen und damit des Rasters kann variieren.Alternatively, the surface of the metering roller may also be made of ceramic or chromed steel. Preferably, the metering roller is designed as an anilox roller. By means of a grid made of wells of a certain size grid, the order quantity per area can be controlled even better. The size of the cups and thus of the grid can vary.

Wenn die Oberfläche der Auftragswalze mit einem Feinschliff versehen ist, lässt sich die Auftragsmenge besonders genau dosieren, bei einer gleichzeitig hohen Verteilgenauigkeit. Als besonders geeignet hat sich ein linien- oder schraubenförmiges Schliffbild längs der Umfangsrichtung der Auftragswalze herausgestellt.If the surface of the application roller is provided with a fine sanding, the order quantity can be precisely metered, while maintaining high distribution accuracy. Particularly suitable is a line or helical grinding pattern along the circumferential direction of the applicator roll has been found.

Mit Hilfe einer Zeichnung soll ein Ausführungsbeispiel der Erfindung nachfolgend näher erläutert werden. Es zeigt:

Figur 1 -
eine Seitenansicht einer erfindungsgemäßen Vorrichtung;
Figur 2 -
eine perspektivische Darstellung einer erfindungsgemäßen Vorrichtung;
Figur 3 -
die Auftragsrinne in Seitenansicht.
With the aid of a drawing, an embodiment of the invention will be explained in more detail below. It shows:
FIG. 1 -
a side view of a device according to the invention;
FIG. 2 -
a perspective view of a device according to the invention;
FIG. 3 -
the order trough in side view.

In Figur 1 ist eine erfindungsgemäße Vorrichtung in Seitenansicht gezeigt. Die auf die Trägerplatte 2 aufzutragende Suspension 1 tritt aus im Boden der Rinnenhälften 6 einer über dem aus der Dosierwalze 4 und der Auftragswalze 3 bestehenden Walzwerk angeordneten Auftragsrinne 5 befindlichen Schlitzen 7 aus und wird direkt in den Spalt zwischen der Dosierwalze 4 und der Auftragswalze 3 geleitet. Über die verstellbare Breite der Schlitze 7 sowie den verstellbaren Winkel α, unter dem die Rinnenhälften nach außen hin nach unten geneigt sind, kann die Menge der austretenden Suspension gesteuert werden. Zusätzlich kann durch Verschieben der Dosierwalze 4 oder der Auftragswalze 3 die Spaltbreite zwischen beiden verändert werden und somit die Menge der aufgetragenen Suspension 1 auf die Trägerplatte 2 nochmals gesteuert werden. Die Oberflächen der Auftragswalze 3 und der Dosierwalze 4 sind derart beschichtet, dass die aufzutragende Suspension 1 an der Auftragswalze 3 haften bleibt. Von dieser Auftragswalze 3 wird die Suspension 1 auf die Trägerplatte 2 übertragen. Dies ist im vergrößerten Ausschnitt aus Figur 1 verdeutlicht. Durch die Pfeile in den Walzen wird die jeweilige Drehrichtung angedeutet. Im vergrößerten Ausschnitt sieht man deutlich, dass in Drehrichtung vor dem Kontakt zwischen Auftragswalze 3 und Trägerplatte 2 die aufzutragende Suspension 1 an der Auftragswalze 3 haftet. Nach dem Kontakt ist die Suspension 1 auf die Trägerplatte 2 übertragen worden.In FIG. 1 a device according to the invention is shown in side view. The applied to the support plate 2 suspension 1 exits in the bottom of the trough halves 6 located above the consisting of the metering roll 4 and the applicator roll 3 order trough slots 5 located 7 and is passed directly into the gap between the metering roll 4 and the applicator roll 3 , Through the adjustable width of the slots 7 and the adjustable angle α, below which the gutter halves are inclined downwardly outwardly, the amount of the exiting suspension can be controlled. In addition, by moving the metering roller 4 or the applicator roller 3, the gap width between the two can be changed and thus the amount of the applied suspension 1 on the support plate 2 can be controlled again. The surfaces of the applicator roller 3 and the metering roller 4 are coated in such a way that the suspension 1 to be applied remains adhered to the applicator roll 3. From this application roller 3, the suspension 1 is transferred to the support plate 2. This is in the enlarged section FIG. 1 clarified. By the arrows in the rollers, the respective direction of rotation is indicated. The enlarged section clearly shows that in the direction of rotation before the contact between applicator roll 3 and support plate 2, the suspension 1 to be applied adheres to the applicator roll 3. After contact, the suspension 1 has been transferred to the carrier plate 2.

Figur 2 zeigt eine perspektivische Ansicht einer erfindungsgemäßen Vorrichtung. Die Auftragsrinne 5, die sich über dem Spalt zwischen Dosierwalze 4 und Auftragswalze 3 befindet, weist zwei Rinnenhälften 6 auf, die von der Mitte - wo auch ein zentraler Zuführstutzen 8 angeordnet ist - ausgehend nach unten geneigt sind. Im Boden dieser Rinnenhälften 6 befinden sich Schlitze 7, die von der Mitte der Auftragsrinne 5 zu den Seiten hin zunehmende Breite aufweisen. Durch diese tritt die aufzutragende Suspension, die in Figur 2 nicht gezeigt ist, aus. Durch den trapezförmigen Querschnitt der beiden Rinnenhälften 6, wird die durch den nicht gezeigten zentralen Zuführstutzen in die Auftragsrinne 5 geleitete Suspension 1 immer zu den Schlitzen 7 geleitet. Sowohl der Neigungswinkel α der Rinnenhälften 6 und die Breite der Schlitze 7 sind stufenlos einstellbar, um so die Menge der nach unten austretenden Suspension in Abhängigkeit von ihrer Viskosität und der geforderten Auftragsmenge optimal steuern zu können. Wie in Figur 1 wird die aus der Auftragsrinne 5 austretende Suspension 1 direkt in den Spalt zwischen Auftragswalze 3 und Dosierwalze 4 abgeleitet. Von der Auftragswalze 3 wird die Suspension 1 auf die Trägerplatte 2 übertragen. FIG. 2 shows a perspective view of a device according to the invention. The order trough 5, which is located above the gap between metering roller 4 and applicator roller 3, has two groove halves 6, which are inclined downwards starting from the middle - where a central feed nozzle 8 is also arranged. In the bottom of this Gutter halves 6 are slots 7, which have from the center of the order trough 5 to the sides of increasing width. Through this occurs the suspension to be applied, the in FIG. 2 not shown off. Due to the trapezoidal cross-section of the two channel halves 6, the suspension 1, which is guided into the application channel 5 by the central feed port (not shown), is always directed to the slots 7. Both the angle of inclination α of the trough halves 6 and the width of the slots 7 are infinitely adjustable so as to be able to optimally control the amount of the suspension which exits downwards as a function of its viscosity and the required application quantity. As in FIG. 1 the emerging from the order trough 5 suspension 1 is discharged directly into the gap between applicator roll 3 and metering roller 4. From the applicator roll 3, the suspension 1 is transferred to the support plate 2.

Die Suspension 1 besteht aus einem Melaminharz-Korund-Gemsich und weist einen Festharzanteil von 50% bis 70%, vorzugsweise 60% auf, wobei dem Melaminharz noch Additive, wie beispielsweise Härter, Netz-, Trenn- und Verlaufsmittel sowie Entschäumer beigegeben sind, und weist zudem einen 30% bis 60%igen, vorzugsweise 50%igen Anteil an Korund, beispielsweise Aluminiumoxid auf. Das Korund besitzt eine Größe von etwa 0 bis 120 µm. Neben Korund, das zur Steigerung der Abriebfestigkeit der Oberfläche der beschichteten Trägerplatte dient, lassen sich alternativ so genannte Nanopartikel, beispielsweise Siliziumkarbit, einbringen, die zur Erhöhung der Kratzfestigkeit der Oberfläche beitragen. Zudem bleiben an den mit Nanopartikeln ausgerüsteten Oberflächen weniger Schmutz und Bakterien haften.The suspension 1 consists of a melamine resin-corundum mixture and has a solid resin content of 50% to 70%, preferably 60%, wherein the melamine resin additives such as hardeners, wetting agents, release agents and leveling agents and defoamers are added, and also has a 30% to 60%, preferably 50%, content of corundum, for example aluminum oxide. The corundum has a size of about 0 to 120 microns. In addition to corundum, which serves to increase the abrasion resistance of the surface of the coated carrier plate, alternatively so-called nanoparticles, for example silicon carbide, can be introduced, which contribute to increasing the scratch resistance of the surface. In addition, less dirt and bacteria adhere to the surfaces equipped with nanoparticles.

Durch aufeinander abgestimmte Rotationsrichtung und -geschwindigkeit der Dosierwalze 4 und der Auftragswalze 3 lässt sich eine Menge von etwa 10 g/m2 bis 70 g/m2, vorzugsweise 50 g/m2 auftragen. Die Verteilgenauigkeit beträgt dabei etwa 90%.By coordinated rotation direction and speed of the metering roller 4 and the applicator roll 3 can be an amount of about 10 g / m 2 to 70 g / m 2 , preferably 50 g / m 2 apply. The distribution accuracy is about 90%.

Sowohl die Auftragswalze 3 als auch die Dosierwalze 4 sind mit einer gummierten Oberfläche versehen. Die Shore-Härte des Gummis der Oberfläche beträgt 40 bis 50, vorzugsweise 55. Als Gummi hat sich EPDM als geeignet herausgestellt. Die Oberfläche der Auftragswalze 3 ist zudem mit einem Feinschliff versehen. Als besonders geeignet hat sich ein linien- oder ein schraubenförmiges Schliffbild längs der Umfangsrichtung der Auftragswalze 3 herausgestellt. Mit einer so gestalteten Auftragswalze lässt sich die Auftragsmenge besonders genau dosieren, bei gleichzeitig Verteilgenauigkeit.Both the applicator roller 3 and the metering roller 4 are provided with a rubberized surface. The Shore hardness of the rubber of the surface is 40 to 50, preferably 55. As rubber, EPDM has been found to be suitable. The surface of the applicator roll 3 is also provided with a fine grinding. As special Suitably, a line or a helical grinding pattern has emerged along the circumferential direction of the applicator roller 3. With an applicator roller designed in this way, the application quantity can be dosed particularly precisely, while maintaining distribution accuracy.

Durch die Gummierung der Oberfläche der Walzen 3, 4 erfolgt kein oder kaum Abrieb an den Walzenkörpern, denn überraschend hat sich herausgestellt, dass die Elastizität der gummierten Oberflächen den Transport der mit dem abrasiven Korund versetzten Suspension schadlos übersteht.By gumming the surface of the rollers 3, 4 there is no or hardly any abrasion on the roller bodies, because surprisingly it has been found that the elasticity of the rubberized surfaces can withstand the transport of the suspension mixed with the abrasive corundum without damage.

Alternativ kann die Oberfläche der Dosierwalze 4 auch aus Keramik oder verchromtem Stahl bestehen.Alternatively, the surface of the metering roller 4 may also be made of ceramic or chromed steel.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Suspensionsuspension
22
Trägerplattesupport plate
33
Auftragswalzeapplicator roll
44
Dosierwalzemetering
55
Auftragsrinneapplication groove
66
RinnenhälfteRinne half
77
Schlitzeslots
88th
Zuführstutzensupply pipe
αα
Neigungswinkeltilt angle

Claims (21)

Vorrichtung zum Auftragen einer mit abrasiven Partikeln, insbesondere Korundpartikeln, versetzten Suspension (1) auf eine Trägerplatte (2), mit einem aus einer Auftragswalze (3) und einer mit der Auftragswalze (3) zusammenwirkenden Dosierwalze (4) bestehenden Walzwerk, dadurch gekennzeichnet, dass über dem Walzwerk (3, 4) eine Auftragsrinne (5) mit zwei seitlich hervorstehenden, unter einem Winkel α gegen die Horizontale nach unten geneigten Rinnenhälften (6) mit bodenseitigen Schlitzen (7) angeordnet ist.Device for applying a suspension (1) mixed with abrasive particles, in particular corundum particles, to a carrier plate (2), comprising a rolling mill consisting of an applicator roll (3) and a metering roll (4) interacting with the applicator roll (3), characterized that on the rolling mill (3, 4) application groove (5) with two laterally projecting, inclined at an angle α to the horizontal downwards groove halves (6) with bottom slots (7) is arranged. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sich die Auftragsrinne (5) über die vollständige Breite des Walzwerks (3, 4) erstreckt.Apparatus according to claim 1, characterized in that the application trough (5) over the full width of the rolling mill (3, 4) extends. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Querschnitt der Auftragsrinne (5) trapezförmig ausgebildet ist.Apparatus according to claim 1 or 2, characterized in that the cross section of the application channel (5) is trapezoidal. Vorrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Seitenwände der Auftragsrinne (5) geschlossen ausgebildet sind.Apparatus according to claim 1, 2 or 3, characterized in that the side walls of the application channel (5) are formed closed. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Schlitze (7) eine variable Breite aufweisen.Device according to one or more of the preceding claims, characterized in that the slots (7) have a variable width. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Breite der Schlitze (7) von der Mitte der Auftragsrinne (5) nach außen hin zunimmt.Apparatus according to claim 5, characterized in that the width of the slots (7) from the center of the order trough (5) increases towards the outside. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Breite der Schlitze (7) sich nach außen hin von 1 mm auf 20 mm erhöht.Apparatus according to claim 5 or 6, characterized in that the width of the slots (7) increases outwardly from 1 mm to 20 mm. Vorrichtung nach Anspruch 5, 6 oder 7, dadurch gekennzeichnet, dass die Breite der Schlitze (7) sich nach außen hin von 1 mm auf 10mm erhöht.Apparatus according to claim 5, 6 or 7, characterized in that the width of the slots (7) increases outwardly from 1 mm to 10 mm. Vorrichtung nach einem oder mehreren der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die Breite der Schlitze (7) stufenlos einstellbar ist.Device according to one or more of claims 5 to 8, characterized in that the width of the slots (7) is infinitely adjustable. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Winkel α zwischen 1° und 15° liegt.Device according to one or more of the preceding claims, characterized in that the angle α is between 1 ° and 15 °. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Winkel α 5° beträgt.Device according to one or more of the preceding claims, characterized in that the angle α is 5 °. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Winkel α stufenlos einstellbar ist.Device according to one or more of the preceding claims, characterized in that the angle α is infinitely adjustable. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Auftragsrinne (5) einen zentralen Zuführstutzen (8) aufweist.Apparatus according to claim 1, characterized in that the application channel (5) has a central feed connection (8). Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Oberfläche der Dosierwalze (4) und der Auftragswalze (3) gummiert ist.Device according to one or more of the preceding claims, characterized in that the surface of the metering roller (4) and the applicator roller (3) is rubberized. Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, dass die Shore-Härte des Gummis 40 bis 70 beträgt.Apparatus according to claim 14, characterized in that the Shore hardness of the rubber is 40 to 70. Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, dass die Shore-Härte 55 beträgt.Apparatus according to claim 15, characterized in that the Shore hardness is 55. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Oberfläche der Auftragswalze (3) einen Feinschliff aufweist.Device according to one or more of the preceding claims, characterized in that the surface of the applicator roll (3) has a fine grinding. Vorrichtung nach Anspruch 17, dadurch gekennzeichnet, dass ein linien- oder schraubenförmiges Schliffbild längs der Umfangsrichtung der Auftragswalze (3) vorgesehen ist.Apparatus according to claim 17, characterized in that a line or helical grinding pattern along the circumferential direction of the applicator roll (3) is provided. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Oberfläche der Dosierwalze aus Keramik besteht.Device according to one or more of the preceding claims, characterized in that the surface of the metering roller consists of ceramic. Vorrichtung nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Oberfläche der Dosierwalze (4) aus verchromtem Stahl besteht.Device according to one or more of the preceding claims, characterized in that the surface of the metering roller (4) consists of chromed steel. Vorrichtung nach einem der Ansprüche 14, 19 oder 20, dadurch gekennzeichnet, dass die Dosierwalze (4) als Rasterwalze ausgebildet ist.Device according to one of claims 14, 19 or 20, characterized in that the metering roller (4) is designed as an anilox roller.
EP08013512A 2007-08-23 2008-07-26 Device for applying a suspension to a carrier plate Not-in-force EP2027935B1 (en)

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EP2027935B1 (en) 2009-10-07
DE102007039949B3 (en) 2008-12-04
US20090050054A1 (en) 2009-02-26
DE502008000136D1 (en) 2009-11-19
PL2027935T3 (en) 2010-04-30
ES2332956T3 (en) 2010-02-15

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