EP0599996B1 - Procede permettant d'enlever un excedent d'un materiau present sous une forme plastique en le raclant, et agencement servant a appliquer ce procede - Google Patents

Procede permettant d'enlever un excedent d'un materiau present sous une forme plastique en le raclant, et agencement servant a appliquer ce procede Download PDF

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Publication number
EP0599996B1
EP0599996B1 EP92918567A EP92918567A EP0599996B1 EP 0599996 B1 EP0599996 B1 EP 0599996B1 EP 92918567 A EP92918567 A EP 92918567A EP 92918567 A EP92918567 A EP 92918567A EP 0599996 B1 EP0599996 B1 EP 0599996B1
Authority
EP
European Patent Office
Prior art keywords
belt
workpiece
workpieces
advance
arrangement
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.)
Expired - Lifetime
Application number
EP92918567A
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German (de)
English (en)
Other versions
EP0599996A1 (fr
Inventor
Roy Johansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUSTAF KAHR AB
Original Assignee
GUSTAF KAHR AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUSTAF KAHR AB filed Critical GUSTAF KAHR AB
Publication of EP0599996A1 publication Critical patent/EP0599996A1/fr
Application granted granted Critical
Publication of EP0599996B1 publication Critical patent/EP0599996B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/026—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an elongated body renewable by feeding it across the surface
    • 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
    • B05D7/06—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 wood

Definitions

  • the present invention relates to a method for stopping and scraping off any surplus material as a continuous process during the feeding of long strip and/or flat-surfaced workpieces, each of which is provided with at least one applied coat of a material present in a plastic condition.
  • the invention also relates to an arrangement for executing the method.
  • a customary procedure for eliminating the aforementioned surface irregularities involves the manual application of some form of stopper compound.
  • the stopper compound is often mixed with wood meal and/or colouring pigment in order to permit a final result which differs as little as possible from a flawless untreated surface.
  • a spade-like tool made of steel, wood, rubber or similar is normally used in the stopping operation to spread the compound. Stopping must often be performed in a number of directions in order to obtain a good final result.
  • EP-A-0 368 199 discloses a method and a tool for performing a manual stopping like operation.
  • the thickness of a coating to be applied by said tool may be controlled by increasing or decreasing the pressure of the tool blade against the surface so that a more or less pronounced squeezing effect is achieved between the tool blade being more or less bent and the surface to be coated.
  • the manual stopping operation is highly labour-intensive and calls for special treatment of those workpieces which exhibit surface irregularities. Persons involved in manual stopping work easily suffer wear-and-tear injuries.
  • the work of stopping can also be mechanized, and the compound can be applied with the help of a roller, for example. In this case, however, it is generally difficult to reuse any excess stopping compound.
  • SU-A-0 856 580 discloses a device adapted to smooth varnish material and scrape off excess amounts thereof.
  • the said device includes an arrangement for propelling objects having a surface to be provided with varnish, and a "Möbius" type endless band arrangement one section of which is arranged to run across the surface to be provided with varnish coating. On passing over the surface one edge of said band engages the surface for smoothing the varnish material and scraping off laterally excess thereof.
  • the present invention proposes a solution to the problems described above.
  • the invention comprises a method and an arrangement for stopping and scraping off any surplus material combined with a stopping process.
  • the problem to be solved includes not only the drawbacks of the old methods and known devices, i.e. the strenuous manual work involved in traditional stopping and machines which could not turn out satisfactory products, viz. products of a quality comparable with the quality attained by a skilled craftsman using the manual tool.
  • the basic object was to find out a method and to construct a machine, by means of which it is possible to - so to say - simulate the performance and function of the manually operated spade like tool. In order to reach this aim it was found necessary to imitate the function of the flexible tool blade held by the hand and used for both stopping and scraping off excess material.
  • a workpiece 1 for example in the form of a laminated parquet board, is advanced along a feed track 2 inwards towards the plane of the paper in Figure 1 (from right to left in Figure 2). In this way the workpiece is caused to pass beneath an application roller 3 for the application of stopper compound in a previously disclosed fashion.
  • the application roller may be grooved in order to deposit a number of parallel stable strands of stopper compound on the workpiece. Once the whole workpiece has passed through the application roller, it is transferred sideways mechanically and automatically from feed track 2 to feed track 4. The workpiece is then moved along feed track 4 in a direction away from the plane of the paper in Figure 1 (from left to right in Figure 2).
  • the workpiece is caused to pass a belt-like device 5 which is driven and controlled by two rollers 6 mounted to either side of the two feed tracks 2 and 4 in the bearings C.
  • the belt-like device is driven in a direction cross-wise to the direction of advance of the workpiece.
  • the belt-like device 5 largely forms an angle with the surface of the workpiece; see Figure 2. This angle is not shown in Figure 1.
  • the angle of attack between the belt-like device and the workpiece is 2.5-60°, and preferably 5-30°.
  • any excess of plastic stopping material accompanies the belt around the roller 6 situated closest to the stopping device and onwards as far as a scraper arrangement 7 which returns the excess material to storage container 8 for the roller application device via a guide arrangement 9.
  • any excess of plastic stopping material is instead transferred to and accompanies another belt-like device (not shown) which brings the excess stopping material to a scraper arrangement that returns the excess material to a storage container.
  • the holding-down arrangement 10 which forces the belt-like device against the workpiece during scraping.
  • the holding-down arrangement 10 consists of a belt holding device 11, a pressure cylinder 12 and the associated piston rod 13, which is attached to the belt holding-down device.
  • the pressure cylinder 12 is accommodated in a box-shaped holder 14, from which two guides 15 extend for the sliding control of the holding device 11.
  • the holder 14 is rigidly attached to a support beam 16.
  • the support beam 16 is fixed between the bearing brackets C.
  • the workpieces generally consist of wood, primarily oak and/or beech.
  • the wood is rough-ground prior to the stopping procedure, whereupon it is polished.
  • the dust on the surface is blown, brushed and/or sucked away.
  • the workpieces are advanced at a speed of 6-70 m/min, preferably 25-30 m/min.
  • the viscosity of the plastic material is preferably 300,000-900,000 cP.
  • the plastic material is usually plastic-based and preferably UV-hardening. Hardening is performed most rapidly by subjecting the stopped workpieces to UV light from a radiation source in a separate later operation (not shown in the Figures). The rate of hardening and the depth of hardening can be regulated for the same light source, for example, through the degree of pigmentation in the plastic material.
  • That part of the belt-like device which does not form an angle with the surface of the workpiece is in contact with the workpiece.
  • the belt-like device being manufactured from a metal, such as steel, glass fibre material, ceramic material or the like, in a thickness of 0.25-4.5 mm, and preferably 0.8 mm, and being elastically resilient.
  • the rate of advance of the belt i.e. the rate of scraping of the material, is 3-90 m/min, and preferably 20-25 m/min.
  • Effective filling of cavities is achieved in that the wave of material in the form of stopping compound forced up by the belt 5, apart from being displaced in the longitudinal sense of the workpiece, also has imparted to it a lateral movement in the form of the stopping movement across the direction of advance of the workpiece.
  • the arrangement in accordance with the invention accordingly permits excess plastic material to be scraped off in an elegant fashion in accordance with the invention from continuous and/or flat-surfaced workpieces, each of which workpieces is provided with at least one applied layer of the plastic material.
  • the application roller 3 and the belt-like device 5 can be installed on the same feed track. It is also possible for two belt-like devices to be combined, in conjunction with which one is preferably set up for optimal filling at a certain angle to the workpiece, and the other for optimal scraping at another, larger angle to the workpiece.
  • the belt-like device can also be so arranged that the direction of advance of the workpiece and the movement path of the belt-like device 5 form an angle other than the 90° shown in the example.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Sustainable Development (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (10)

  1. Procédé permettant d'enlever en le raclant un quelconque excédent de matériau et d'arrêter les pièces d'ouvrage (1,1') sous la forme d'un processus continu pendant l'alimentation de pièces d'ouvrage (1, 1') à longue bande et/ou à surface plane (1, 1'), chacune d'elles étant munie de l'application d'au moins une couche d'un matériau présent sous une forme plastique, où le matériau est enlevé par raclage dans une direction transversale à la direction d'avance des pièces d'ouvrage (1, 1'), avec compression du matériau dans une direction contraire à la direction d'avance mentionnée précédemment, en liaison avec laquelle la compression du matériau est obtenue par l'intermédiaire d'un effet d'amincissement et de pression au fur et à mesure que le matériau est en cours du transport dans la direction d'avance à l'encontre de l'effet d'une surface disposée contrairement à la direction d'avance, caractérisé en ce que la plus grande partie de la surface délimite un angle aigu avec la surface de la pièce d'ouvrage (1, 1') de manière à réaliser l'effet d'amincissement et la plus petite partie de la surface ne délimite aucun angle avec la surface de la pièce d'ouvrage (1, 1') an étant ainsi en contact avec la pièce d'ouvrage (1, 1') de manière à réaliser l'effet de pression.
  2. Procédé selon la revendication 1, caractérisé en ce que les pièces d'ouvrage (1, 1') sont amenées à avancer à une vitesse de 25 à 30 m/min.
  3. Procédé selon une quelconque des revendications précédentes, caractérisé en ce que le matériau est enlevé par raclage à une vitesse de 20 à 25 m/min.
  4. Agencement servant à appliquer le procédé selon une quelconque des revendications précédentes, en liaison avec lequel les pièces d'ouvrage (1, 1') sont disposées de manière à être amenées à avancer, et le matériau plastique est disposé de manière à être appliqué sous la forme d'un processus continu, où, disposé au-dessus de la surface de la pièce d'ouvrage (1, 1') avec le matériau plastique à enlever par raclage, se trouve un dispositif an forme de courroie (5) présentant une surface prévue pour ce raclage, laquelle est entraínée dans une direction transversale à la direction d'avance des pièces d'ouvrage (1, 1'), et où le dispositif en forme de courroie (5) est maintenu par un dispositif de maintien de courroie (11) s'étendant au moins sur toute la largeur de la pièce d'ouvrage (1, 1'), caractérisé en ce que le dispositif en forme de courroie (5) délimite largement un angle aigu avec la surface de la pièce d'ouvrage (1, 1') et en ce que ce même dispositif en forme de courroie (5) est élastiquement résilient et maintenu par le dispositif de maintien de courroie (11) de telle manière qu'une bande du dispositif en forme de courroie (5) la plus proche de la pièce d'ouvrage (1, 1') et s'étendent au moins sur toute la largeur de la pièce d'ouvrage (1, 1') soit complètement libre de se plier et de s'ajuster à la surface de la pièce d'ouvrage (1, 1') de sorte qu'une partie du dispositif en forme de courroie (5) qui ne délimite pas un angle aigu avec la surface de la pièce d'ouvrage (1, 1') est en contact avec la pièce d'ouvrage (1, 1') du fait que le dispositif de maintien de courroie (11), un vérin de pression (12) et une tige de piston (13) poussent ensemble le dispositif en forme de courroie (5) contre la pièce d'ouvrage (1, 1').
  5. Agencement selon la revendication 4,
    caractérisé en ce que l'angle entre le dispositif en forme de courroie (5) et la surface de pièce d'ouvrage (1, 1') est de 5 à 30°.
  6. Agencement selon une quelconque des revendications 4 et/ou 5,
    caractérisé par deux rouleaux (6) situés de chaque côté d'au moins une piste (2) pour faire avancer la pièce d'ouvrage (1, 1') afin d'entraíner et de guider le dispositif en forme de courroie (5).
  7. Agencement selon une quelconque des revendications 4 à 6,
    caractérisé en ce que le dispositif en forme de courroie (5) est fabriqué à partir d'un métal, tel que l'acier, un matériau à fibres de verre, un matériau céramique ou analogue.
  8. Agencement selon une quelconque des revendications 4 à 7,
    caractérisé en ce que le dispositif an forme de courroie (5) présente une épaisseur de 0,8 mm.
  9. Agencement selon une quelconque des revendications 4 à 8,
    caractérisé par un agencement racleur (7), lequel débarrasse la dispositif en forme de courroie (5) de l'excédent de matériau plastique enlevé par raclage qu'il porte avec lui et ramène le matériau vers un agencement d'application ou analogue.
  10. Agencement selon une quelconque des revendications 4 à 9,
    caractérisé an ce que la direction d'avance de la pièce d'ouvrage ,(1, 1') et le trajet de déplacement du dispositif en forme de courroie (5) délimite un angle différent de 90°.
EP92918567A 1991-08-22 1992-08-19 Procede permettant d'enlever un excedent d'un materiau present sous une forme plastique en le raclant, et agencement servant a appliquer ce procede Expired - Lifetime EP0599996B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9102423A SE500129C2 (sv) 1991-08-22 1991-08-22 Sätt och anordning för att avstryka och spackla långsträckta eller ytplana arbetsstycken
SE9102423 1991-08-22
PCT/SE1992/000559 WO1993003859A1 (fr) 1991-08-22 1992-08-19 Procede permettant d'enlever un excedent d'un materiau present sous une forme plastique en le raclant, et agencement servant a appliquer ce procede

Publications (2)

Publication Number Publication Date
EP0599996A1 EP0599996A1 (fr) 1994-06-08
EP0599996B1 true EP0599996B1 (fr) 1999-03-24

Family

ID=20383526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918567A Expired - Lifetime EP0599996B1 (fr) 1991-08-22 1992-08-19 Procede permettant d'enlever un excedent d'un materiau present sous une forme plastique en le raclant, et agencement servant a appliquer ce procede

Country Status (8)

Country Link
EP (1) EP0599996B1 (fr)
DE (1) DE69228753T2 (fr)
DK (1) DK0599996T3 (fr)
ES (1) ES2131531T3 (fr)
FI (1) FI108523B (fr)
NO (1) NO302688B1 (fr)
SE (1) SE500129C2 (fr)
WO (1) WO1993003859A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501564C2 (sv) * 1993-06-18 1995-03-13 Btg Kaelle Inventing Ab Bestrykningsanordning för en eller tvåsidig bestrykning av en löpande bana

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1570976A (en) * 1924-04-11 1926-01-26 United Printing Machinery Comp Bronzing machine
US2022009A (en) * 1930-07-11 1935-11-26 Rocca Agostino Machine for coating metallic cores with cement plaster by spiral windings, provided with devices to regulate the forming and conveying rollers and belts
US3030914A (en) * 1957-09-25 1962-04-24 John B Coyne Swabbing device
AU495697B2 (en) * 1974-10-02 1977-03-24 J.C. Ludowici & Son Ltd. Doctor blade coating
SE442832B (sv) * 1980-05-23 1986-02-03 Bjorn Von Tell Sett att fylla ut ytojemnheter i treprodukter med ridabeleggning
DE3837828A1 (de) * 1988-11-08 1990-05-10 Nokia Unterhaltungselektronik Verfahren und vorrichtung zum beschichten einer substratplatte fuer einen flachen anzeigeschirm

Also Published As

Publication number Publication date
SE9102423L (sv) 1993-02-23
NO940591L (no) 1994-02-21
DK0599996T3 (da) 2000-06-05
DE69228753T2 (de) 1999-10-07
WO1993003859A1 (fr) 1993-03-04
EP0599996A1 (fr) 1994-06-08
NO940591D0 (no) 1994-02-21
SE9102423D0 (sv) 1991-08-22
FI940812A (fi) 1994-02-21
ES2131531T3 (es) 1999-08-01
SE500129C2 (sv) 1994-04-25
DE69228753D1 (de) 1999-04-29
NO302688B1 (no) 1998-04-14
FI940812A0 (fi) 1994-02-21
FI108523B (fi) 2002-02-15

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