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EP0250915B1 - Procédé pour enlever les couches d'enduits de pièces à usiner - Google Patents

Procédé pour enlever les couches d'enduits de pièces à usiner Download PDF

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Publication number
EP0250915B1
EP0250915B1 EP87108071A EP87108071A EP0250915B1 EP 0250915 B1 EP0250915 B1 EP 0250915B1 EP 87108071 A EP87108071 A EP 87108071A EP 87108071 A EP87108071 A EP 87108071A EP 0250915 B1 EP0250915 B1 EP 0250915B1
Authority
EP
European Patent Office
Prior art keywords
paint
refrigerant
needle gun
needle
gun
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
Application number
EP87108071A
Other languages
German (de)
English (en)
Other versions
EP0250915A1 (fr
Inventor
Bodo Marx
Günther Weyermanns
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim 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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Priority to AT87108071T priority Critical patent/ATE46838T1/de
Publication of EP0250915A1 publication Critical patent/EP0250915A1/fr
Application granted granted Critical
Publication of EP0250915B1 publication Critical patent/EP0250915B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
    • B08B7/0092—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • B08B7/022—Needle scalers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
    • B44D3/162—Scrapers

Definitions

  • the invention relates to a method for removing paint layers located on workpieces according to the preamble of claim 1.
  • Paint and varnish layers can be removed from workpieces in a variety of ways, for example by the action of chemical solvents, heat, sandblasting or similar mechanical actions.
  • a particularly clean and environmentally friendly method is to remove the paint layers through the mechanical action of compressed air-operated needle guns.
  • the efficiency of the needle guns is significantly increased if the paint layers are first embrittled by a low-boiling cryogenic refrigerant such as liquid nitrogen or COs dry ice.
  • EP-A 10 058 307 A corresponding prior art is shown, for example, by EP-A 10 058 307 and DE-A 13 212 171.
  • EP-A 10 058 307 excess adhesive that has escaped from the flanged edges of workpieces is embrittled by liquid nitrogen and with a Needle gun removed. Cold vaporized nitrogen can also be blown onto the processing point using the needle gun.
  • DE-A 13 212 171 describes a method for removing lacquer layers from objects, in which the objects are immersed in a bath of liquid nitrogen for the purpose of embrittling the lacquer layers.
  • the embrittled paint is removed mechanically by irradiation with a granulate.
  • liquid nitrogen can also be sprayed on with the granulate.
  • such methods are prohibited for workpieces sensitive to cold.
  • some historical steel structures are made of ferritic old steel with a composition that is sometimes unknown, and which behaves completely brittle even at temperatures below -10 ° C. In the course of time, such structures in particular were repeatedly painted over with paint, which must be removed during a major renovation.
  • the invention is therefore based on the object to provide a method for removing layers of paint with the aid of needle guns and embrittlement by a low-boiling cryogenic refrigerant, which can also be used on workpieces sensitive to cold, without the workpieces cooling to an inadmissible depth.
  • the workpiece to be cleaned is only locally cooled at the time of the mechanical treatment with the needle gun.
  • the cooling time of the workpiece or the advance of the needle gun is inevitably determined by the continuous removal of paint.
  • a corresponding parameter specification, matched to the individual application and the fact that the workpiece is cooled only briefly, does not lead to critical hypothermia and the associated embrittlement of the material.
  • the method according to the invention can be used practically anywhere.
  • the device shown in Fig. 1 shows a component 1 made of cold-sensitive ferritic waste steel, from which a color layer 2 is to be removed.
  • a needle gun 3 with needles 4 made of plastic or metal is used.
  • the needle gun 3 is operated with compressed air, which is generated in a compressor 5.
  • the operating pressure of the needle gun 3 is adjusted with the pressure regulator 6 depending on the thickness of the paint layer 2.
  • Liquid nitrogen is used as the refrigerant, which is taken from the store 7 and the amount of which is adjusted according to the requirements of the ink layer 2 by means of the flow regulator 8.
  • the liquid nitrogen is introduced directly into the needle gun 3, through the nozzle 9, which is attached to the guide shaft 10 for the needles.
  • the paint layer consisted of a paint system consisting of more than 20 individual layers.
  • the actual base coat was red lead, the top coat was leaded oil paint.
  • the thickness of the paint was between 0.8 mm and 1.3 mm.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)

Claims (3)

1. Procédé pour enlever sur des pièces d'oeuvre (1) les couches de peinture (2) qui s'y trouvent, par fragilisation à l'aide d'un moyen de refroidissement cryogène à bas point d'ébullition et par action d'un pistolet à aiguilles (3), procédé caractérisé en ce que le moyen de refroidissement est amené simultanément avec l'action mécanique du pistolet à aiguilles et seulement dans la zone d'action de celui-ci.
2. Procédé selon la revendication 1, caractérisé en ce que le moyen de refroidissement est introduit par une tubulure (9) dans le pistolet à aiguilles (3).
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la pression du moyen de refroidissement et la pression de fonctionnement du pistolet à aiguilles (3) sont prédéfinies en fonction de l'épaisseur de la couche de peinture (2).
EP87108071A 1986-07-03 1987-06-04 Procédé pour enlever les couches d'enduits de pièces à usiner Expired EP0250915B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108071T ATE46838T1 (de) 1986-07-03 1987-06-04 Verfahren zum entfernen von auf werkstuecken befindlichen farbschichten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3622329 1986-07-03
DE3622329A DE3622329C1 (de) 1986-07-03 1986-07-03 Verfahren zum Entfernen von auf Werkstuecken befindlichen Farbschichten

Publications (2)

Publication Number Publication Date
EP0250915A1 EP0250915A1 (fr) 1988-01-07
EP0250915B1 true EP0250915B1 (fr) 1989-10-04

Family

ID=6304301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108071A Expired EP0250915B1 (fr) 1986-07-03 1987-06-04 Procédé pour enlever les couches d'enduits de pièces à usiner

Country Status (3)

Country Link
EP (1) EP0250915B1 (fr)
AT (1) ATE46838T1 (fr)
DE (1) DE3622329C1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804588A1 (de) * 1988-02-13 1989-05-11 Bayer Ag Verfahren zum polieren von lackoberflaechen
FR2652283B1 (fr) * 1989-09-25 1992-12-31 Mouchard Jean Procede et appareil pour traiter des revetements muraux ou de sol.
DE4041307A1 (de) * 1990-12-21 1992-06-25 Linde Ag Verfahren zum entlacken von werkstuecken
FR2672250B1 (fr) * 1991-02-06 1995-03-10 Cogia Procede et appareil destine a decaper une surface recouverte d'un revetement.
JPH105684A (ja) * 1996-04-23 1998-01-13 Fuji Heavy Ind Ltd ストリッパブル塗膜の剥離方法
DE19946957C1 (de) * 1999-09-30 2001-02-01 Messer Griesheim Gmbh Vorrichtung und Verfahren zum Entfernen einer Beschichtung von einem Substrat
DE102010007224A1 (de) * 2010-02-09 2011-08-11 Ford-Werke GmbH, 50735 Verfahren zum Abtragen von Overspray thermischer Spritzschichten
CN118341616B (zh) * 2023-07-18 2025-05-13 汤杰 一种轻量化多功能保养系统及其使用方法和应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934379A (en) * 1974-09-03 1976-01-27 Wisconsin Alumni Research Foundation Removal of built up layers of organic coatings
DE3040119A1 (de) * 1980-10-24 1982-05-06 Messer Griesheim Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum entfernen von lackschichten
DE3105836A1 (de) * 1981-02-18 1982-09-02 Messer Griesheim Gmbh, 6000 Frankfurt "verfahren und vorrichtung zur entfernung von ueberschuessigen klebern von den boerdelkanten von werkstuecken"
DE3212171A1 (de) * 1982-04-01 1983-10-06 Adolf Berkmann Verfahren und vorrichtung zum entfernen von durch nasslackieren oder pulverbeschichten entstandenen lackschichten auf gegenstaenden

Also Published As

Publication number Publication date
EP0250915A1 (fr) 1988-01-07
DE3622329C1 (de) 1987-07-30
ATE46838T1 (de) 1989-10-15

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