EP3569372A1 - Procédé de revêtement de lames de coupe - Google Patents

Procédé de revêtement de lames de coupe Download PDF

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Publication number
EP3569372A1
EP3569372A1 EP19174632.0A EP19174632A EP3569372A1 EP 3569372 A1 EP3569372 A1 EP 3569372A1 EP 19174632 A EP19174632 A EP 19174632A EP 3569372 A1 EP3569372 A1 EP 3569372A1
Authority
EP
European Patent Office
Prior art keywords
pattern
coating
layer
elevations
quantities
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19174632.0A
Other languages
German (de)
English (en)
Other versions
EP3569372B1 (fr
Inventor
Heiko Zander
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.)
Weber Maschinenbau GmbH Breidenbach
Original Assignee
Weber Maschinenbau GmbH Breidenbach
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 Weber Maschinenbau GmbH Breidenbach filed Critical Weber Maschinenbau GmbH Breidenbach
Priority to PL19174632T priority Critical patent/PL3569372T3/pl
Publication of EP3569372A1 publication Critical patent/EP3569372A1/fr
Application granted granted Critical
Publication of EP3569372B1 publication Critical patent/EP3569372B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • 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
    • B05D2202/00—Metallic substrate
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • B05D5/086—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers having an anchoring layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/002—Materials or surface treatments therefor, e.g. composite materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers

Definitions

  • the present invention relates to a method for coating cutting knives, in particular sickle or circular knives, for machines for slicing food products, preferably high-performance slicers, in which at least one surface area coming into contact with the food products during operation is coated with a coating, in particular a non-stick Coating is provided.
  • the invention relates to a cutting blade, in particular sickle or circular blade, for machines for slicing food products, preferably high-performance slicer, in which at least one, preferably in operation coming into contact with the food products, surface area is provided with a coating, in particular with a non-stick coating.
  • carrier materials are provided with coatings.
  • so-called non-stick coatings are provided in many areas of technology for certain carrier materials, which prevent the respective products to be processed from adhering to the carrier materials.
  • Typical fields of application of such non-stick coatings are, for example, cutting knives in devices for slicing food products, such as meat, sausage, ham, cheese or the like.
  • Such cutting knives can, for example, be designed as rotating circular knives or rotating circular knives surrounding a further axis his.
  • the slicing device can be, for example, a high-performance slicer.
  • the term "local elevation” is to be understood to mean something which, on the one hand-unlike a merely roughened surface-has a sufficient size to be recognized by the naked eye, but which on the other hand does not form an essential part of the invention Knife surface occupies.
  • a mere roughening of a knife surface, for example, would be so not covered by the invention.
  • a few, for example less than 10 or 20, respectively relatively large elevations, taken together take a relatively large proportion, such as more than half of the surface area of the knife in question, do not fall under the invention.
  • the protuberances may according to the invention e.g. on the entire outside of the knife, which shows in the transport direction in the product storage direction, are formed. Alternatively, however, the elevations can also be formed only on one or more subregions of this surface. A partial area is in particular a surface area in contact with the separated product slices.
  • the coating may alternatively or additionally be provided in those areas which serve to generate airflow to support the disc tray.
  • the coating according to the invention can also be provided on the side facing the product to be sliced, in order to reduce the friction and the tendency for deposits.
  • a particular advantage of the invention is that the coating can be produced in a particularly simple manner and relatively inexpensively. In particular, it is possible to produce an excellent non-stick coating without expensive specialty materials and without expensive equipment. This will be discussed in more detail elsewhere.
  • a sheet-like material layer is applied, wherein either the material layer before the application of the pattern as a Base coat or after the application of the pattern is applied as a topcoat.
  • the discretely distributed amounts of material forming the pattern may cooperate with the sheet of material to form the bumps.
  • the pattern is applied before the material layer is completely dried, or the material layer is applied before the pattern is completely dried.
  • the drying of the pattern or the material layer before applying the respective other layer has the advantage that the materials on the one hand do not completely flow together, on the other hand enter into an intimate connection with each other. In particular, this can lead to chemical crosslinking. The emergence of a three-dimensional structure formed by the local surveys is thus ensured.
  • Another advantage of this concept of intermediate drying - that is, drying but not complete drying - is that smooth transitions between the protuberances occur by themselves, regardless of whether the pattern is applied to the material layer or the material layer is applied to the pattern ,
  • the drying and / or complete drying i. drying, can be done by a thermal treatment or supported.
  • this thermal treatment may be a firing or stoving process. In this way, the intimate connection or chemical crosslinking between the two materials can be further improved.
  • an unstructured pattern is applied and / or that the material quantities forming the pattern are distributed unevenly.
  • An unstructured pattern or an uneven distribution of material quantities can be self-evident if the quantities of material are applied by hand, that is, by hand without the use of aids that aim at homogenization or structuring, such as masks, apertured diaphragms or gratings.
  • a structured pattern is formed and / or that the material quantities forming the pattern are distributed uniformly.
  • the pattern can be applied by sprinkling, flaking or spraying the amounts of material. Special techniques or complex devices are not required to apply the pattern. For example, a conventional paint spray gun can be used.
  • the pattern may be due to a random distribution of material quantities.
  • the distribution of material quantities can be specified exactly.
  • the pattern can be applied using a mask, a perforated plate or a grid.
  • a liquid or powdery substance may be used as the material for the layer and / or as the material for the pattern.
  • a paint can be used as the material for the layer and the material for the pattern.
  • the material for the layer and the material for the pattern may be identical. But you can also use different materials. For example, the materials may differ in color. If the pattern is applied to a base coat and no additional topcoat is applied, a different design pattern can provide an additional design effect.
  • At least one of the materials contains at least one additional material, in particular silicon carbide.
  • additional material in particular silicon carbide.
  • Other materials can also be used as additional material, in particular materials which lead to increased stability and strength, in particular with regard to abrasion or wear.
  • the layer consists of or comprises the layer of polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the surface of the cutting blade has been subjected to a pre-treatment prior to application of the coating, in particular a pretreatment by sandblasting.
  • a concrete example of the material of the layer and of the material of the pattern is a coating system with the product name ILAFLON Resist R Plus, available from the company Industrielack AG, Switzerland.
  • the material for the pattern may include silicon carbide, which increases the stability and strength of the coating and the abrasion resistance due to the high hardness of this material.
  • the invention is not limited to the provision of a single sheet of material in conjunction with the material forming the pattern. According to another possible embodiment, it is provided that a further sheet-like material layer is applied, which is either applied to the already existing base layer and after applying the pattern as a topcoat or before applying the pattern and the topcoat layer as a basecoat.
  • the cover layer is a closed layer of material on the surface of the knife, which is advantageous from a hygiene point of view. In addition, in this way the appearance of the knife can be improved.
  • these advantages of a cover layer are also given if no base layer is present. Then the amounts of material forming the elevations are in direct contact with the knife surface.
  • the "three-layered" structure of base layer, pattern and cover layer provided in the embodiment discussed here has the advantage of a closed cover layer with optimum adhesion of the individual amounts of material to the base layer.
  • the additional material layer increases the effort in the production of the coating according to the invention and also leads to a greater total thickness of the coating.
  • the coating comprises a pattern of a plurality of discretely distributed, the surveys forming material quantities.
  • the coating additionally preferably comprises at least one planar material layer, the pattern being located either below or on the material layer.
  • the amounts of material may be in the form of speckles, drops, spots, spots or spots.
  • a transition region is present, in which the materials have merged into each other, are mixed together and / or each other have penetrated.
  • the individual amounts of material are firmly connected to the material layer.
  • transition regions there is an intimate connection or chemical crosslinking between the individual materials, which can be further improved by a thermal treatment, as also described above.
  • the diameter of at least a predominant number of material quantities and / or elevations in each case between a lower limit in the range of about 0.05 and 0.10 mm and an upper limit in the range of about 1 to 2mm.
  • the diameters of the smallest amounts of material and / or elevations are each in the range of about 0.07 to 0.09 mm and the largest amounts of material and / or elevations each in the range of 1.2 to 2.0 mm.
  • this does not exclude that some amounts of material and / or elevations may be smaller or larger than the aforementioned ranges.
  • Individual quantities of material and / or elevations may, for example, have diameters of up to 4 mm.
  • the proportion of the area of the surface area provided with the coating is 5 to 50%, in particular 15 to 15, occupied by the quantities of material and / or elevations 35%.
  • the relevant surface area is that area of the surface of the knife on which the material quantities are actually discretely distributed. If not the entire side of a knife is coated according to the invention, but e.g. only in one of the cutting edge of the knife outgoing, annular portion provided with a coating according to the invention, while an inner portion of the relevant side of the knife has no coating according to the invention, this inner portion is not taken into account in the determination of the area equipment.
  • the quantities of material or elevations can be dimensioned such that the knife surface is given a freckled appearance in terms of size and distribution of the quantities of material or elevations.
  • the maximum height of at least a predominant number of material quantities and / or elevations relative to the knife surface or to a material layer underlying the material quantities and / or elevations may be more than 0.3 mm, preferably more than 0.5 mm and particularly preferably more than 1 mm.
  • the material for the layer and / or the material for the pattern comprises a liquid or powdery substance, in particular a lacquer.
  • a so-called texture lacquer may be used, which after complete drying itself forms a three-dimensional structure with a plurality of elevations and depressions. Such Structure is also coarser than a roughened surface only. With such a coating, which is also referred to as a hammered finish, a so-called orange peel or hammer impact effect can be achieved.
  • a structured lacquer can simply be applied to the knife with a foam roller.
  • depressions can be incorporated mechanically into a coating applied to the knife, for example into a coating according to the invention.
  • These depressions may e.g. be produced by grinding, laser cutting, milling or embossing.
  • knife surfaces formed according to these independent aspects have excellent non-stick properties, in particular with regard to sliced food products.
  • each schematically illustrated cutting blade 10 each comprise a blade body made of steel with a receiving opening 11 for attachment to a Hochadosslicer and with a spiral ( Fig. 1 and 2 ) or circular ( Fig. 3 ) Cutting edge 26.
  • the cutting knives 10 are each provided on the outside, which is also referred to as the front side, which faces away from the product to be sliced in the cutting operation and thus points in the depositing direction of the product slices to be separated, with a coating 14 according to the invention.
  • the coating 14 is provided on the entire outside.
  • the circular blade according to Fig. 3 on the other hand, it is provided with a coating 14 only in an annular portion of the outside in the manner according to the invention, starting from the cutting edge 26.
  • An inner portion of the outside of the knife, which does not come into contact with the separated product slices, has no coating according to the invention.
  • the rear sides of the knives 10, which are not shown, may also be provided, in whole or in part, with a coating according to the invention.
  • the coatings 14 each comprise a lacquer layer 16 applied as a base layer to the knife body, to which a multiplicity of discretely distributed amounts of material 19 are applied, each of which has an elevation 18 on the surface Basecoat 16 form. These amounts of material 19 are also formed by a varnish.
  • the elevations 18 are randomly distributed on the knife surface, so form an unstructured pattern of elevations 18. Also in terms of shape and size, the elevations 18 vary randomly.
  • Such a pattern with randomly distributed elevations 18 can be produced for example by spraying or flaking the lacquer onto the base layer 16.
  • a structured pattern of elevations 18 is provided.
  • the at least substantially the same shape and size having elevations 18 are not randomly distributed on the base layer 16, but lie on each parallel to the cutting edge 26 extending lines.
  • Such a distribution of the elevations 18 can be produced, for example, using a mask or template, for example in the form of a pinhole or a grid.
  • the elevations 18 are arranged on the intersections of a regular grid forming, each intersecting at a right angle lines. Also, this pattern can be generated using, for example, a correspondingly designed pinhole or stencil.
  • elevations 18 forming material quantities 19 are applied to a previously applied base layer 16 and about no additional Cover layer is applied, then the elevations 18 are formed directly from the amounts of material 19 itself.
  • a covering layer covering the discretely distributed quantities of material can be applied. The thickness of this cover layer is chosen so that the three-dimensional structure is maintained and thus the elevations are each formed by one of the material quantities and the overlying part of the cover layer.
  • Fig. 4 is like in the embodiments of Fig. 1 . 2 and 3 only a single, continuous, continuous material layer is present, namely the base layer 16 applied directly to the knife body.
  • the individual quantities of material 19 which each directly form one of the elevations 18.
  • the quantities of material 19 each merge smoothly into an adjacent quantity of material 19 or into the surrounding base layer 16, whereby gentle transitions 22 are created.
  • Fig. 5 shows the already mentioned, somewhat reversed arrangement in which the amounts of material 19 are each applied directly to the knife body and then coated with a common continuous cover layer 16. Again, the already mentioned concept of intermediate drying is used, resulting in intimate connections between the material of the cover layer 16 and the individual amounts of material 19. Here, too, soft transitions 22 are present between the individual elevations 18, which are each formed by a quantity of material 19 and the overlying part of the cover layer 16.
  • Fig. 6 are the two variants according to 4 and 5 sort of combined with each other.
  • a pattern of discretely distributed amounts of material 19 is first applied. Subsequently, a continuous cover layer 16 is applied.
  • a coating 14 according to Fig. 4 is prepared in a first step, a base coat is applied to the knife body and then the knife for a period of about 5 minutes at a temperature of 100 ° C superficially dried. Subsequently, using a conventional paint gun, a paint is dripped at a comparatively low pressure in the range of 0.2 to 0.5 bar on the previously applied, only superficially dried basecoat.
  • This second step can be done in a so-called cloister process, in which only the paint spray gun is moved horizontally relative to the blade surface and then vertically back and forth. This process, ie horizontal flaking and subsequent vertical flitting - can be repeated, for example, three times.
  • the painter leading the spray gun can compare the resulting paint pattern with a template showing a desired pattern, ie make a visual inspection. If necessary, then further amounts of paint are trickled until the specification is met.
  • the knife is completely dried for a period of about 10 minutes at a temperature of about 380 ° C.
  • the paint drops and the base coat which have merged into each other to a certain extent in a transitional area or have mixed with each other, go in this final drying process in a high Measures tight binding.
  • gentle transitions between the paint drops and the respective base coat are automatically achieved.
  • the abovementioned parameters can be varied in particular for the period of time and the temperature of the intermediate drying.
  • Cutting knives according to the invention show an excellent cutting behavior. It can be smooth cuts perform that lead in particular to no scoring in the cut surfaces.
  • the cutting blades of the invention produce no or at most a negligible abrasion of the products.
  • the separated product slices can be stored exactly due to the low friction in the respectively predetermined manner.
  • cutting blades are particularly resistant to contamination and can be cleaned very well. Also, a high mechanical strength of the knife is given, so that long service life is guaranteed.
  • Another advantage of the invention is that the coating can be applied in a simple manner and using inexpensive materials.
  • conventional paints or varnishes can be used.
  • no special tools or expensive devices for applying the coating are required.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP19174632.0A 2018-05-16 2019-05-15 Procédé de revêtement de lames de coupe Active EP3569372B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19174632T PL3569372T3 (pl) 2018-05-16 2019-05-15 Sposób nakładania powłok na noże tnące

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018111762.0A DE102018111762A1 (de) 2018-05-16 2018-05-16 Verfahren zum Beschichten von Schneidmessern

Publications (2)

Publication Number Publication Date
EP3569372A1 true EP3569372A1 (fr) 2019-11-20
EP3569372B1 EP3569372B1 (fr) 2021-06-30

Family

ID=66554257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19174632.0A Active EP3569372B1 (fr) 2018-05-16 2019-05-15 Procédé de revêtement de lames de coupe

Country Status (3)

Country Link
EP (1) EP3569372B1 (fr)
DE (1) DE102018111762A1 (fr)
PL (1) PL3569372T3 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19612055A1 (de) * 1996-03-27 1997-10-02 Wabaema Gmbh Sichelmesser
US6145426A (en) * 1996-10-15 2000-11-14 Credo Tool Company Dimpling
US20020112589A1 (en) * 2001-02-19 2002-08-22 Lee Chang Hyun Saw blade shank
DE102009006912A1 (de) * 2009-01-30 2010-08-05 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
EP2650090A1 (fr) * 2012-04-12 2013-10-16 Weber Maschinenbau GmbH Breidenbach Lame de coupe avec élément déflecteur
DE102012007250A1 (de) * 2012-04-11 2013-10-17 Weber Maschinenbau Gmbh Breidenbach Schneidmesser

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6103361A (en) * 1997-09-08 2000-08-15 E. I. Du Pont De Nemours And Company Patterned release finish
DE102004016615A1 (de) * 2004-04-03 2005-10-27 Reifenhäuser, Uwe Messer für eine motorgetriebene Schneidmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19612055A1 (de) * 1996-03-27 1997-10-02 Wabaema Gmbh Sichelmesser
US6145426A (en) * 1996-10-15 2000-11-14 Credo Tool Company Dimpling
US20020112589A1 (en) * 2001-02-19 2002-08-22 Lee Chang Hyun Saw blade shank
DE102009006912A1 (de) * 2009-01-30 2010-08-05 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
DE102012007250A1 (de) * 2012-04-11 2013-10-17 Weber Maschinenbau Gmbh Breidenbach Schneidmesser
EP2650090A1 (fr) * 2012-04-12 2013-10-16 Weber Maschinenbau GmbH Breidenbach Lame de coupe avec élément déflecteur

Also Published As

Publication number Publication date
EP3569372B1 (fr) 2021-06-30
PL3569372T3 (pl) 2021-12-20
DE102018111762A1 (de) 2019-11-21

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