DE2109393A1 - Rotating doctor rod with magnetic or pneumatic pressure - Google Patents
Rotating doctor rod with magnetic or pneumatic pressureInfo
- Publication number
- DE2109393A1 DE2109393A1 DE19712109393 DE2109393A DE2109393A1 DE 2109393 A1 DE2109393 A1 DE 2109393A1 DE 19712109393 DE19712109393 DE 19712109393 DE 2109393 A DE2109393 A DE 2109393A DE 2109393 A1 DE2109393 A1 DE 2109393A1
- Authority
- DE
- Germany
- Prior art keywords
- doctor rod
- paper
- film
- rod
- rotating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
- D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
- B41F15/40—Inking units
- B41F15/42—Inking units comprising squeegees or doctors
- B41F15/426—Inking units comprising squeegees or doctors the squeegees or doctors being magnetically attracted
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
- D21H5/006—Controlling or regulating
- D21H5/0062—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper
- D21H5/0067—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper with an essentially cylindrical body, e.g. roll or rod
Description
Rotierender Rakelstab mit magnetischer oder pneumatischer Anpressung Bei der Veredlung von Papier-, Folien- und Gewebebahnen eröffnen Walzenkörper mit extrem kleinen Durchmessern viele verfahrenstechnische Möglichkeiten; einerseits, weil deren Flexibitität die wertvolle Eigenschaft der Anpassung an Stärkendifferenzen der Materialbahn geben, andererseits aber auch, weil kleine Durchmesser hohe spezifische Liniendrücke ermöglichten.Rotating doctor rod with magnetic or pneumatic pressure When finishing paper, film and fabric webs, roller bodies open up extremely small diameters many process engineering options; on the one hand, because their flexibility is the valuable property of adapting to differences in strength give the material web, but on the other hand also because small diameters are high specific Line pressures made possible.
Mit solchen Rotationskörpern kleiner Durchmesser können Farben, Lacke, Klebstoffe und dergleichen beim Beschichtungsvorgang dosiert oder egalisiert werden. Oder es können Quetscheffekte ausgeführt werden, um Materialbahnen mit einer Rollneigung quer zur Verarbeitungsrichtung zu der gewünschten Planlage zu bringen, oder, um die Rollneigung einer Leimbeschichtung durch ein Brechen des gut ausgetrockneten Leimes zu unterbinden.With such rotating bodies of small diameter, paints, varnishes, Adhesives and the like are dosed or equalized during the coating process. Or squeezing effects can be applied to material webs with a tendency to curl to bring to the desired flatness across the processing direction, or to the tendency of a glue coating to curl due to breaking of the well-dried one To prevent glue.
Bekannt sind Systeme, bei denen der Rotationskörper, in einem Prisma rotierend, über die eingelegte Materialbahn gegen die meistens mit einem Gummimantel überzogene Umlenkwalze gedrückt wird. Nachteilig ist hierbei das Prisma, welches die Rotationsdrehzahl einschränkt, weil die Reibung im Prisma hoch ist, aber nachteilig ist auch der dabei entstehende hohe Verschleiß. Versuche, den Stab durch eine Vielzahl von Rollenlagern prismaähnlich zu führen, scheiterten an dem Aufwand des Antriebes, an der Verschmutzung der Rollenohne lager oder Antrieb der RolLenLager an der Torston des kaketstabes.Systems are known in which the rotating body, rotating in a prism, is pressed over the inserted web of material against the deflection roller, which is usually covered with a rubber jacket. The disadvantage here is the prism, which restricts the rotational speed because the friction in the prism is high, but the high wear that occurs is also disadvantageous. Attempts to guide the rod through a large number of roller bearings in a prism-like manner failed because of the expense of the drive, because of the contamination of the rollers without bearings or Drive of the roller bearing on the doorstep of the packet rod.
Neuerdings werden Rakelstäbe bereits zur Farb-Dosierung im Siebdruck eingesetzt, wobei diese von Magnetkörpern angezogen und gegen das Sieb gedrückt werden. Hierbei hat der Rakelstab die Aufgabe, die Farbe mit sehr gleichmäRiger Kraft durch das Sieb hindurch auf die Materialbahn zu fördern.Squeegee bars have recently been used for color metering in screen printing used, these being attracted by magnetic bodies and pressed against the sieve will. Here the squeegee has the task of applying the color very evenly To promote force through the sieve onto the material web.
Ein ähnliches System benutzt der erfindungsgemäße Gegenstand. Es wird einerseits empfohlen, in das Innere einer gummiummantelten Walze einen leistenförmigen Magneten einzubauen, dessen Anziehungskraft ausreicht, den Rotationsstab mit der verfahrenstechnisch optimalen Wirkung an die Materialbahn zu ziehen. Dabei entfällt die Prismenlagerung und deren Antrieb. The subject matter of the invention uses a similar system. It On the one hand, it is recommended to insert a strip-shaped roller into the interior of a rubber-coated roller To build in magnets, the attraction of which is sufficient to connect the rotating rod to the to draw procedurally optimal effect to the material web. This does not apply the prism bearings and their drive.
Es ist lediglich dafür zu sorgen, daß der Stab an seinen Enden gelagert wird, so daß ein Mitnehmen in Richtung des Materialbahnlaufes verhindert wird. It is only necessary to ensure that the rod is supported at its ends is, so that it is prevented from being taken along in the direction of the path of the material web.
Die Zeichnung 1 zeigt eine mögliche Ausführungsform;die Walze 1 mit dem Gummimantel 2 nimmt den leistenförmigen Magneten 3 auf, dessen Joch 4 so ausgeführt wird, daß sich über das magnetisch neutrale Walzenrohr 5 ein Magnetschluß über das Rakel 6 ausbilden kann. Der Rakelstab 6 wird dadurch gegen die Papierbahn 7 an den Gummimantel 2 gedrückt. The drawing 1 shows a possible embodiment, the roller 1 with the rubber jacket 2 receives the strip-shaped magnet 3, the yoke 4 of which is designed in this way is that via the magnetically neutral roller tube 5, a magnetic circuit on the Squeegee 6 can form. The doctor rod 6 is thereby against the paper web 7 to the Rubber jacket 2 pressed.
Eine andere erfindungsgemäße Lösung bietet ein magnetisches Walzensystem, bei dem der Rakelstab, wiederum ein Rotationskörper, mit kleinem Durchmesser den magnetischen Kraftfluß schließt. Die zwei Stützwalzen vor und hinter dem Rakelstab stellen die Polenden des magnetischen Joches dar. Eine ähnliche Anordnung benutzt statt der zwei Stützwalzen stationäre Streichleisten. Another solution according to the invention offers a magnetic roller system, in which the doctor rod, again a body of revolution, with a small diameter magnetic flux closes. The two back-up rollers in front of and behind the doctor rod represent the pole ends of the magnetic yoke. A similar arrangement is used instead of the two back-up rollers, stationary coating bars.
Durch die Veränderung der magnetischen Kraft, bzw. des Vakuums, der Oberw fläche des Rotationskörpers oder dessen Durchmesser, aber auch durch Veränderung des Stützwalzenabstandes und der Elastizität des Gummimantels können die verfahrenstechnischen Effekte variiert werden) Die Abb. B zeigt diese erfindungsgemäße Lösung mit den beiden Stützwalzen 10, die das Jochende des Magneten 11 darstellen. Der Rakelstab 12 wird umschlungen von der Materialbahn 13 und gleichzeitig vom magnetischen Kraftfluß an die Stützwalzen 10 gezogen.By changing the magnetic force or the vacuum, the Surface of the solid of revolution or its diameter, but also through change the distance between the back-up rollers and the elasticity of the rubber jacket can change the process-related Effects are varied) Fig. B shows this inventive solution with the two support rollers 10, which represent the yoke end of the magnet 11. The squeegee 12 is wrapped around by the web of material 13 and at the same time by the magnetic flux drawn to the support rollers 10.
Eine weitere erfindungsgemäße Lösung ohne Magnetleisten zeigt die Abb. C. Hier wird der Rakelstab von dem Vakuum einer Unterdruckkammer an vorzugsweise 2 Stützwalzen gedrückt. Die gegensinnig angetriebene Walze 20 mit dem Gummimantel 21 und die Stützwalze 22 bilden zwei Begrenzungswände des Vakuumraumes 23. Die Materialbahn 24 umschlingt die Stützwalze 20. Bei luftdurchlässigen Materialbahnen ist auch eine Bahnführung über die Stützwalze 20 und 22 möglich. Der Rakelstab 25 wird vom Vakuum gegen die Materialbahn 24 und die Stützwalzen gedrückt. Another solution according to the invention without magnetic strips is shown in FIG. C. Here the doctor rod is pressed by the vacuum of a negative pressure chamber onto preferably 2 support rollers. The oppositely driven roller 20 with the rubber jacket 21 and the support roller 22 form two boundary walls of the vacuum space 23. The material web 24 wraps around the support roller 20. The doctor rod 25 is pressed by the vacuum against the material web 24 and the support rollers.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712109393 DE2109393A1 (en) | 1971-02-27 | 1971-02-27 | Rotating doctor rod with magnetic or pneumatic pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712109393 DE2109393A1 (en) | 1971-02-27 | 1971-02-27 | Rotating doctor rod with magnetic or pneumatic pressure |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2109393A1 true DE2109393A1 (en) | 1972-09-07 |
Family
ID=5800016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712109393 Pending DE2109393A1 (en) | 1971-02-27 | 1971-02-27 | Rotating doctor rod with magnetic or pneumatic pressure |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2109393A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3309731A1 (en) * | 1982-03-29 | 1983-10-06 | Johannes Zimmer | DEVICE FOR THE EVEN APPLICATION OF DETERMINABLE LIQUID AMOUNTS |
DE4037675A1 (en) * | 1990-11-27 | 1992-06-11 | Rose Walter Gmbh & Co Kg | METHOD AND DEVICE FOR APPLYING A PLASTIC COATING TO SURFACES TO BE PROTECTED |
-
1971
- 1971-02-27 DE DE19712109393 patent/DE2109393A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3309731A1 (en) * | 1982-03-29 | 1983-10-06 | Johannes Zimmer | DEVICE FOR THE EVEN APPLICATION OF DETERMINABLE LIQUID AMOUNTS |
DE4037675A1 (en) * | 1990-11-27 | 1992-06-11 | Rose Walter Gmbh & Co Kg | METHOD AND DEVICE FOR APPLYING A PLASTIC COATING TO SURFACES TO BE PROTECTED |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OHA | Expiration of time for request for examination |