EP2689938A1 - Procédé de fabrication de crayons en bois - Google Patents

Procédé de fabrication de crayons en bois Download PDF

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Publication number
EP2689938A1
EP2689938A1 EP12178234.6A EP12178234A EP2689938A1 EP 2689938 A1 EP2689938 A1 EP 2689938A1 EP 12178234 A EP12178234 A EP 12178234A EP 2689938 A1 EP2689938 A1 EP 2689938A1
Authority
EP
European Patent Office
Prior art keywords
pins
primer layer
face
layer
pin
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
EP12178234.6A
Other languages
German (de)
English (en)
Other versions
EP2689938B1 (fr
Inventor
Udo Beck
Walter Oetter
Iwan Savidfoluschi
Anke Dr. Dieringer
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.)
Faber Castell AG
Original Assignee
Faber Castell AG
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 Faber Castell AG filed Critical Faber Castell AG
Priority to EP12178234.6A priority Critical patent/EP2689938B1/fr
Priority to BR102013018692A priority patent/BR102013018692A2/pt
Publication of EP2689938A1 publication Critical patent/EP2689938A1/fr
Application granted granted Critical
Publication of EP2689938B1 publication Critical patent/EP2689938B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/14—Sheathings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/16—Making non-propelling pencils

Definitions

  • the invention relates to a method for producing wood-filled pins, wherein at least two coatings forming an end cap are applied to the end face of the rear pin end. So far, a dipping method is used for this purpose.
  • a number of pins are fixed on a support so that their pin longitudinal directions are parallel to each other and their end faces are arranged at the same height level.
  • the carrier equipped with pins is lowered to a bath with liquid coating agent so far that the end faces come into contact with the coating agent. When removing the pins from the dip forms on the front side a covering this coating.
  • the face is not ground smooth before coating. It therefore still has pores and depressions, so a certain roughness. Therefore, a primer layer is first applied to the end face, which covers pores and depressions in the end face and serves as a basis for a subsequently applied color coating.
  • the primer layer is dried, which takes up to 12 hours depending on the thickness of water-based coating compositions.
  • the color layer is applied.
  • the ink layer is - due to the dipping process - also relatively thick, so that in the case of a water-based coating material for their drying a time required as in the drying of the primer layer is required.
  • the object of the invention is to provide an alternative method for producing holzgeankter pins, which in particular allows a higher production throughput.
  • a method according to claim 1 characterized in that applied to the front side of a primer layer of a UV coating, the primer layer cured with UV light and then a color coat is applied to the primer layer by means of a printing process.
  • a UV cure can take place immediately, taking only milliseconds to seconds. Since a UV varnish does not solidify by drying, ie by evaporation of a solvent, but by a radiation-induced crosslinking, the layer applied to the front side can be comparatively thin, which facilitates the process. For example, there is a risk that such a layer will run or form drops, which would affect the later appearance of the end cap.
  • the color layer can be applied. However, this is not done by a dipping process, but by a printing process. By means of a printing process, it is possible to produce color layers with such a thin layer thickness that a solvent bleed even in the case of water-based coating materials dry extremely fast. In addition to saving time, the proposed procedure thus also involves a saving of coating material.
  • all printing methods which can be used to produce thin color layers are suitable as printing processes.
  • very particularly preferred is the pad printing.
  • elastic pressure media for example made of silicone rubber, are particularly suitable when the end face of the pins is not flat but convex or convex.
  • the pad printing method it is possible in a simple manner, a group of pens, which are fixed to a serving for diving, approximately plate or disk-shaped carrier, in this arrangement, so without further manipulation to print.
  • the equipped with pins carriers must be passed only to a printing station.
  • each individual pin or a group of pins can be contacted or acted upon, each with a tampon element. This is particularly easy to accomplish if the pins are arranged at right angles to each other extending longitudinal and transverse rows.
  • a wood-cased pin 1 consists essentially of a shaft 2 made of wood and a centrally fixed in the shaft 3 mine.
  • the front end of the pin 1 is conical or provided for such a design.
  • An end face 4 arranged at the rear end of the pin extends in a plane or is, as in Fig. 1 and 2 shown convex or convex.
  • the mine 3 extends into the end face 4.
  • the end face 4 is covered by an end cap 5, which preferably consists of a base layer 6 and a covering this color layer 7.
  • a number of pins 1 are arranged so that their longitudinal directions 9 extend parallel to each other and the end faces 4 are at the same height level 10.
  • fixing holes 13 are provided in the carrier, in which the pins 1 are inserted with its front end (14).
  • a container 15 is provided, in which a UV varnish 16 is in liquid form. The carrier 8 and the container 15 are moved relative to one another such that the end faces 4 touch the surface of the liquid UV varnish 16, wherein a layer or a film of the UV varnish adheres to the end faces 14.
  • the carrier 8 is transferred to a UV irradiation station (not shown). After a brief UV irradiation, the UV varnish has hardened.
  • a UV varnish for example, a preparation having the following composition can be used: Oligomer (Sartomer CN2282, Cray Vally) 66% Monomer (Laromer TPGDA, BASF) 30% Photoinitiator (Darocur 1173, BASF) 2.4% Photoinitiator (Irgacure 819, BASF). 1.2% Defoamer (Tego Airex 900, Evonik) 0.2% Surfactant (Tego Rad 2600, Evonik) 0.2%
  • the primer layer 6 is cured and can now be printed by means of a printing process, with which thin layers of paint can be produced.
  • a tampon printing method a plate-shaped plunger 17 is used with a flat side on which at least one pad element 18 is present.
  • this is dimensioned in the width and longitudinal direction so that the total number of supported by the carrier 8 pins 8 contacted and an existing on the tampon element 18 color preparation can be transferred to the end faces 4 of the pins 1.
  • Each pen is associated with a tampon element 18.
  • the pins are arranged in a regular grid, forming longitudinal rows 19 and transverse rows 20.
  • the tampon elements are arranged on the plunger 17.
  • the in Fig. 5 shown plunger 17 has strip-shaped tampon elements 18 ', which each print a pin longitudinal row 19 of a fixed in a carrier 8 group of pins 1.
  • a water-based color coat with the following composition is suitable: Binder: Aqueous polyurethane dispersion (Liopur 97-282, Synthopol-Chemie) 50.6% Polyurethane thickener (Rheolate 244, Elementis) 3% Aqueous pigment preparation (Levanyl Blue G-LF, Bayer AG) 0.7% Aqueous pigment preparation (Levanox white RNZ-SF, Bayer AG) 5% Solvent: 1,2-propanediol 10% Defoamer (EFKA 2526, EFKA Additives BV) 0.7%. Water ad 100%

Landscapes

  • Printing Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP12178234.6A 2012-07-27 2012-07-27 Procédé de fabrication de crayons en bois Active EP2689938B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12178234.6A EP2689938B1 (fr) 2012-07-27 2012-07-27 Procédé de fabrication de crayons en bois
BR102013018692A BR102013018692A2 (pt) 2012-07-27 2013-07-23 Processo para a produção de lápis com invólucro de madeira

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12178234.6A EP2689938B1 (fr) 2012-07-27 2012-07-27 Procédé de fabrication de crayons en bois

Publications (2)

Publication Number Publication Date
EP2689938A1 true EP2689938A1 (fr) 2014-01-29
EP2689938B1 EP2689938B1 (fr) 2015-09-09

Family

ID=46682682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12178234.6A Active EP2689938B1 (fr) 2012-07-27 2012-07-27 Procédé de fabrication de crayons en bois

Country Status (2)

Country Link
EP (1) EP2689938B1 (fr)
BR (1) BR102013018692A2 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB504453A (en) * 1938-01-14 1939-04-25 Mathilde Lamezan Salins Improvements in or relating to pencils
US4897142A (en) * 1987-09-04 1990-01-30 Caran D'ache S.A. Process and apparatus for the continuous line manufacture of pencils
EP0834351A1 (fr) * 1996-10-04 1998-04-08 Acco-Rexel Group Services Plc Procédé et appareil pour revêtir des objets de forme allongée

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB504453A (en) * 1938-01-14 1939-04-25 Mathilde Lamezan Salins Improvements in or relating to pencils
US4897142A (en) * 1987-09-04 1990-01-30 Caran D'ache S.A. Process and apparatus for the continuous line manufacture of pencils
EP0834351A1 (fr) * 1996-10-04 1998-04-08 Acco-Rexel Group Services Plc Procédé et appareil pour revêtir des objets de forme allongée

Also Published As

Publication number Publication date
BR102013018692A2 (pt) 2014-12-23
EP2689938B1 (fr) 2015-09-09

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