EP0319510B1 - Method for the manufacture of press knives for sheet material resembling cardboard - Google Patents

Method for the manufacture of press knives for sheet material resembling cardboard Download PDF

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Publication number
EP0319510B1
EP0319510B1 EP19880890291 EP88890291A EP0319510B1 EP 0319510 B1 EP0319510 B1 EP 0319510B1 EP 19880890291 EP19880890291 EP 19880890291 EP 88890291 A EP88890291 A EP 88890291A EP 0319510 B1 EP0319510 B1 EP 0319510B1
Authority
EP
European Patent Office
Prior art keywords
cutting
coating
cardboard
sheet material
knives
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
EP19880890291
Other languages
German (de)
French (fr)
Other versions
EP0319510A3 (en
EP0319510A2 (en
Inventor
Oswald Kern
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.)
Boehler Ybbstalwerke GmbH
Original Assignee
Boehler Ybbstalwerke GmbH
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 Boehler Ybbstalwerke GmbH filed Critical Boehler Ybbstalwerke GmbH
Publication of EP0319510A2 publication Critical patent/EP0319510A2/en
Publication of EP0319510A3 publication Critical patent/EP0319510A3/en
Application granted granted Critical
Publication of EP0319510B1 publication Critical patent/EP0319510B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4436—Materials or surface treatments therefore

Definitions

  • the invention relates to a method for producing line cutting knives for cardboard-like sheet material, in particular for food packaging, according to the preamble of claim 1.
  • cutting objects or razor blades are known in which, in order to avoid adhesion to the cutting surface, to improve and / or to increase the durability of the cutting properties, if necessary by heating, a coating of molybdenum disulfide according to that in the preamble of claim 1 is baked.
  • a method for coating the cutting surfaces of cutting tools in which a coating material is applied and the tool is guided in a predetermined manner along a stream of superheated gas such that the gas stream only the coating material and the cutting surfaces are heated and the temperature is high enough to achieve a bond between the coating material and the cutting surface.
  • the object of the invention was to achieve an improvement in the service life of line cutting knives and also to use recycling material which, due to its nature, tends to separate paper dust or contaminates the cutting edge with adhesives.
  • the aim is achieved by the features of claim 1. This also ensures that there is an even coating and a low coefficient of friction and that there is no dust. Due to the low adhesion for adhesives due to a homogeneous coating, the knives have a long service life.
  • the coating thickness is 1 to 5 ⁇ m, preferably 3 ⁇ m, since particularly good sliding properties result.
  • the individual cutting knives 1 are combined into a package 5, the remaining cutting edges 3 and the adjoining roof-shaped cutting surfaces being coated 4 by a wide spray nozzle 6 Experienced.
  • the spray mist is applied evenly on both sides of the cutting edges 3 when a uniform feed is set up according to arrow 8.
  • the coating creates a smooth surface, which results in a longer service life because the amount of dust is very low. It is particularly important to mention the fact that adhesive adhesives on the raw material do not adhere to the cutting edge. As tests have shown, an exact cutting edge of the cardboard is also guaranteed over long processing times.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Knives (AREA)
  • Nonmetal Cutting Devices (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Linien-Schneidmessern für kartonartiges Flächenmaterial, insbesondere für Lebensmittelverpackungen gemäß Oberbegriff des Anspruches 1.The invention relates to a method for producing line cutting knives for cardboard-like sheet material, in particular for food packaging, according to the preamble of claim 1.

Aus der GB-A-1 050 242 sind schneidende Gegenstände bzw. Rasierklingen bekannt, bei welchen zur Vermeidung einer Haftung an der Schneidfläche, zur Verbesserung und/oder zur Haltbarkeitssteigerung der Schneideigenschaften gegebenenfalls durch Erwärmung eine Beschichtung aus Molybdän-Disulfid- gemäß dem im Oberbegriff des Anspruches 1 genannten Verfahren eingebrannt wird.From GB-A-1 050 242, cutting objects or razor blades are known in which, in order to avoid adhesion to the cutting surface, to improve and / or to increase the durability of the cutting properties, if necessary by heating, a coating of molybdenum disulfide according to that in the preamble of claim 1 is baked.

Weiters ist aus der GB-A-1 135 839 ein Verfahren zur Beschichtung der Schneidflächen von Schneidwerkzeugen bekannt geworden, bei welchem ein Beschichtungsmaterial aufgebracht und das Werkzeug in vorbestimmter Weise derart an einem Strom hocherhitzten Gases entlang geführt wird, daß der Gasstrom nur das Beschichtungsmaterial und die Schneidflächen erwärmt und eine ausreichend hohe Temperatur bewirkt, um eine Bindung zwischen Beschichtungsmaterial und Schneidfläche zu erreichen.Furthermore, from GB-A-1 135 839 a method for coating the cutting surfaces of cutting tools is known, in which a coating material is applied and the tool is guided in a predetermined manner along a stream of superheated gas such that the gas stream only the coating material and the cutting surfaces are heated and the temperature is high enough to achieve a bond between the coating material and the cutting surface.

Es ist bekannt, Schneidmesser zu erstellen, die biegbar sind, eine ausreichende Härte der Schneide aufweisen und gegebenenfalls nach herkömmlichen Verfahren beschichtet sind, um eine vertretbare Standzeit solcher Werkzeuge zu erreichen. Dazu werden Materialien, insbesondere ein Stahl verwendet, der eine durchgehende Härte aufweist und somit den Anforderungen Rechnung trägt. Auch ist es bekannt, nur die Schneide allein durch Hochfrequenzhärtung zu vergüten, um somit eine Erhöhung der Standzeit zu erreichen. Die Standzeit eines Linien - Schneidmessers hängt sehr von der Stahlqualität der Schneidauflage, der Härte der Messerschneide, dem Messer- bzw. Fasenwinkel, der Qualität des Nachschliffs bzw. des Abziehens sowie gegebenenfalls der Qualität der Beschichtung und nicht zuletzt von der Beschaffenheit des Schneidgutes ab.It is known to produce cutting knives which are bendable, have a sufficient hardness of the cutting edge and, if appropriate, are coated by conventional methods in order to achieve an acceptable service life for such tools. For this purpose, materials, in particular steel, are used which have a constant hardness and thus take account of the requirements. It is also known to only temper the cutting edge by high-frequency hardening in order to increase the service life. The service life of a line cutting knife depends very much on the steel quality of the cutting support, the hardness of the knife edge, the knife or chamfer angle, the quality of regrinding or honing, and, if necessary, the quality of the coating and, not least, the quality of the material to be cut.

Diese Probleme und deren Lösungen sind bekannt und beispielsweise aus "Papier + Kunststoff-Verarbeiter", 1-82, Seiten 17, 18 und 20 " Das Messer im Schnellschneider" zu entnehmen.These problems and their solutions are known and can be found, for example, in "Paper + Plastic Processor", 1-82, pages 17, 18 and 20 "The knife in the high-speed cutter".

Es hat sich aber gezeigt, daß die herkömmlichen Methoden, die Standzeit zu erhöhen, nicht ausreichen. Da im erhöhten Maß die Wiederverwendung von Altpapier und damit verstärkt staubbildende Elemente beim Schnittvorgang die Messer rasch verunreinigen, ist z.B. in der Verpackungsindustrie für Lebensmittel ein solches Recyclingmaterial mitunter ungeeignet. Besonders tritt das Problem auf, wenn Etiketten oder ähnliche Aufkleber geschnitten werden, dann haftet auch zumindest stellenweise der Klebstoff an der Schneide und verringert somit arg die Standzeit des Messers. Es wäre denkbar, mit Hilfe von Lösungsmitteln für eine rasche Reinigung zu sorgen, aber damit wird das Werkstück durch Giftstoffe unbrauchbar.However, it has been shown that the conventional methods of increasing the service life are not sufficient. Since the reuse of waste paper and thus increasingly dust-forming elements contaminate the knives rapidly during the cutting process, such a recycling material is sometimes unsuitable for example in the packaging industry for food. The problem arises particularly when labels or similar stickers are cut, then the adhesive sticks to the cutting edge at least in places and thus considerably reduces the service life of the knife. It would be conceivable to provide quick cleaning with the help of solvents, but this makes the workpiece unusable due to toxins.

Ausgehend von diesem Stand der Technik lag der Erfindung die Aufgabe zugrunde, eine Verbesserung der Standzeit von Linien-Schneidmessern zu erzielen und darüberhinaus auch Recyclingmaterial zu verwenden, das auf Grund seiner Beschaffenheit zur Absonderung von Papierstaub neigt bzw. die Schneide durch Klebstoffe verunreinigt. Erfindungsgemäß wird das Ziel durch die Merkmale des Anspruchs 1 erreicht. Damit wird auch erreicht, daß eine gleichmäßige Beschichtung sowie ein niedriger Reibungskoeffizient gegeben sind und damit kein Staubanfall entsteht. Durch die geringe Haftfähigkeit für Klebstoffe infolge einer homogenen Beschichtung stellt sich eine hohe Standzeit der Messer ein.Based on this prior art, the object of the invention was to achieve an improvement in the service life of line cutting knives and also to use recycling material which, due to its nature, tends to separate paper dust or contaminates the cutting edge with adhesives. According to the invention, the aim is achieved by the features of claim 1. This also ensures that there is an even coating and a low coefficient of friction and that there is no dust. Due to the low adhesion for adhesives due to a homogeneous coating, the knives have a long service life.

Als besonders vorteilhaft hat sich erwiesen, wenn die Beschichtungsstärke 1 bis 5 µm, vorzugsweise 3 µm, beträgt, da sich besonders gute Gleiteigenschaften ergeben.It has proven to be particularly advantageous if the coating thickness is 1 to 5 μm, preferably 3 μm, since particularly good sliding properties result.

Als vorteilhaft sich erwiesen, wenn als Beschichtungsmaterial Molybdänpulver mit Lösungsmittel verwendet wird, da die gleichmäßige Verteilung auf der Schneidfläche verbessert ist.It has proven to be advantageous if molybdenum powder with solvent is used as the coating material, since the uniform distribution on the cutting surface is improved.

Anhand eines Ausführungsbeispieles sei die Erfindung näher erläutert. Es zeigen

Fig. 1
Schrägriß eines Messerteiles
Fig. 2
Messerpaket für den erfindungsgemäßen Beschichtungsvorgang

Die Fig. 1 zeigt im Schrägriß einen Teil eines Linien-Schneidmessers 1, das aus einem Flachstahl 2 gefertigt ist. An der Oberseite ist beispielsweise eine Schneidkante 3 in der Mitte des Flachstahls 2 durch mechanische Bearbeitung erstellt. Die Beschichtung 4 wird auf die verbleibenden Seitenflächen bzw. Schneidflächen von der Schneide 3 weg durchgeführt. Hierzu eignet sich Molybdän-Disulfid, das bei Raumtemperatur durch Spritzen aufgetragen wird. Durch Einbrennen bei einer Temperatur von 120 bis 150°C und bei einer Einbrenndauer von 20 bis 40 Minuten, vorzugsweise 30 Minuten, wird die Beschichtung 4 aufgetragen. Der Flachstahl 2 wird an seinen seitlichen Flächen nicht beschichtet.The invention will be explained in more detail using an exemplary embodiment. Show it
Fig. 1
Diagonal cut of a knife part
Fig. 2
Knife package for the coating process according to the invention

Fig. 1 shows in oblique view part of a line cutting knife 1, which is made of a flat steel 2. At the top, for example, a cutting edge 3 is created in the middle of the flat steel 2 by mechanical processing. The coating 4 is carried out on the remaining side surfaces or cutting surfaces away from the cutting edge 3. Molybdenum disulfide, which is applied by spraying at room temperature, is suitable for this. The coating 4 is applied by baking at a temperature of 120 to 150 ° C. and with a baking time of 20 to 40 minutes, preferably 30 minutes. The flat steel 2 is not coated on its lateral surfaces.

Um erfindungsgemäß eine rationelle Fertigung bzw. eine Vereinfachung des Auftrages der Beschichtung durchzuführen, werden gemäß Fig. 2 die einzelnen Schneidmesser 1 zu einem Paket 5 zusammengefaßt, wobei die verbleibenden Schneidkanten 3 und die daran anschließenden, dachförmigen Schneidflächen eine Beschichtung 4 durch eine breite Sprühdüse 6 erfahren. Der Sprühnebel legt sich beidseitig der Schneidkanten 3 dann gleichmäßig an, wenn gemäß Pfeil 8 ein gleichmäßiger Vorschub eingerichtet ist.2, the individual cutting knives 1 are combined into a package 5, the remaining cutting edges 3 and the adjoining roof-shaped cutting surfaces being coated 4 by a wide spray nozzle 6 Experienced. The spray mist is applied evenly on both sides of the cutting edges 3 when a uniform feed is set up according to arrow 8.

Wesentlich ist, daß eine gleichmäßige Beschichtung erfolgt. Durch die Beschichtung wird eine glatte Oberfläche erzielt, woraus eine höhere Standzeit resultiert, weil der Staubanfall sehr gering ist. Als besonders wichtig ist die Tatsache zu erwähnen, daß anhaftende Klebstoffe am Rohmaterial nicht an der Schneide haften bleiben. Wie Versuche ergeben haben, wird auch eine exakte Schneidkante des Kartons über lange Bearbeitungszeiten garantiert.It is essential that there is a uniform coating. The coating creates a smooth surface, which results in a longer service life because the amount of dust is very low. It is particularly important to mention the fact that adhesive adhesives on the raw material do not adhere to the cutting edge. As tests have shown, an exact cutting edge of the cardboard is also guaranteed over long processing times.

Claims (3)

  1. A method of manufacturing cutting knives (1) for cardboard-type sheet material, in particular for food packaging, comprising a strip-shaped carrier part (2) having a cutting surface forming the cutting edge (3) and having an enamelled coating (4) of molybdenum disulphide applied thereto in order to prevent the accumulation of cutting dust and the adhesion of glues, characterised in that the strip-shaped carrier parts (2) are lined up together, with their cutting edges (3) parallel, to form a set (5), and the exposed, mechanically formed cutting surfaces are coated jointly, the coating (4) being applied by a spray nozzle (6) which is moved in a direction (8) transverse to the cutting edges (3) and the opening of which covers the length of the cutting edge (3), and by molybdenum disulphide (7) being sprayed on at room temperature, after which the molybdenum disulphide is enamelled at a temperature between 120°C and 150°C for a duration of 20 to 40 minutes, in particular 30 minutes.
  2. A method of manufacturing cutting knives according to claim 1, characterised in that the coating thickness is 1 µm to 5 µm, preferably 3 µm.
  3. A method of manufacturing cutting knives according to claim 1 or 2, characterised in that molybdenum powder with a solvent is used as a coating material.
EP19880890291 1987-11-30 1988-11-22 Method for the manufacture of press knives for sheet material resembling cardboard Expired - Lifetime EP0319510B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT313287A AT393643B (en) 1987-11-30 1987-11-30 METHOD FOR PRODUCING LINE CUTTING KNIVES FOR CARDBOARD-LIKE SURFACE MATERIAL
AT3132/87 1987-11-30

Publications (3)

Publication Number Publication Date
EP0319510A2 EP0319510A2 (en) 1989-06-07
EP0319510A3 EP0319510A3 (en) 1990-12-19
EP0319510B1 true EP0319510B1 (en) 1994-03-09

Family

ID=3545799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880890291 Expired - Lifetime EP0319510B1 (en) 1987-11-30 1988-11-22 Method for the manufacture of press knives for sheet material resembling cardboard

Country Status (4)

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EP (1) EP0319510B1 (en)
JP (1) JPH01232988A (en)
AT (1) AT393643B (en)
DE (1) DE3888311D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101642915B (en) * 2009-07-07 2012-07-04 苏州安洁科技股份有限公司 Arrayed-blade punching device of rectangular non-metal material and method thereof
CN103433972B (en) * 2013-08-19 2015-04-08 沈阳理工大学 Adhesive sticker plane die cutting method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1050242A (en) * 1900-01-01
GB1050243A (en) *
FR1349075A (en) * 1963-03-06 1964-01-10 Process for producing safety razor blades as well as blades conforming to those obtained by the present process or similar process
US3283117A (en) * 1965-04-22 1966-11-01 Philip Morris Inc Method for coating cutting edges of sharpened instruments
AU485283B2 (en) * 1971-05-18 1974-10-03 Warner-Lambert Company Method of making a razorblade

Also Published As

Publication number Publication date
EP0319510A3 (en) 1990-12-19
AT393643B (en) 1991-11-25
DE3888311D1 (en) 1994-04-14
ATA313287A (en) 1991-05-15
EP0319510A2 (en) 1989-06-07
JPH01232988A (en) 1989-09-18

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