EP0529363A1 - Procédé pour enlever un revêtement collé - Google Patents

Procédé pour enlever un revêtement collé Download PDF

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Publication number
EP0529363A1
EP0529363A1 EP92113369A EP92113369A EP0529363A1 EP 0529363 A1 EP0529363 A1 EP 0529363A1 EP 92113369 A EP92113369 A EP 92113369A EP 92113369 A EP92113369 A EP 92113369A EP 0529363 A1 EP0529363 A1 EP 0529363A1
Authority
EP
European Patent Office
Prior art keywords
coating
cold
carrier material
minus
adhesive
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.)
Withdrawn
Application number
EP92113369A
Other languages
German (de)
English (en)
Inventor
Wolfgang Dipl.-Ing. Bräuner
Hartmut Seel
Eckhard Ullrich
Dieter Stadter
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.)
Buse Gase GmbH and Co KG
Original Assignee
Buse Gase GmbH and Co KG
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 Buse Gase GmbH and Co KG filed Critical Buse Gase GmbH and Co KG
Publication of EP0529363A1 publication Critical patent/EP0529363A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a method for detaching a coating glued onto a carrier material, preferably metal.
  • the solution to this problem is that the adhesive force between the coating and the carrier material is first reduced by the action of cold and then the coating is detached from the carrier material by means of mechanical force.
  • the effect of the cold reduces the adhesive strength of the carrier material and coating-connecting adhesive in such a way that the coating can be removed from the carrier without great effort.
  • the coating is a cold-embrittling material, for example bitumen
  • the coating can be broken mechanically, for example by hammer blows, the coating pieces then falling off the support.
  • a temperature reduction of the adhesive and coating material to minus 20 to minus 30 ° C. is generally sufficient.
  • Such cooling can be achieved quickly and economically, in particular if liquid carbon dioxide is used as the refrigerant, which partly changes into the solid, partly into the gaseous state during its expansion and thereby ensures rapid cooling.
  • liquid carbon dioxide is used as the refrigerant, which partly changes into the solid, partly into the gaseous state during its expansion and thereby ensures rapid cooling.
  • the exemplary embodiment relates to the preparation of dishwasher stainless steel housings for recycling already mentioned at the beginning.
  • the outside of these stainless steel housings has a bitumen layer with a thickness of 3 to 6 mm, which is connected to the stainless steel surface by means of an adhesive.
  • an insulated cooling cell also called a cube freezer.
  • liquid carbon dioxide is introduced into the interior of the freezer via a control unit. This expands in the freezer interior and forms both carbon dioxide gas and dry ice particles.
  • the interior of the freezer is suddenly cooled down to a temperature of minus 60 ° C.
  • the temperature of the stainless steel housing, the bitumen layer and the adhesive layer in between drops in a very short time to below minus 20 ° C, which can easily be determined by conventional temperature sensors.
  • the casing is now removed from the cube freezer and the embrittled bitumen layer is knocked off the stainless steel casing by hammer blows. The bitumen pieces easily detach from the stainless steel surface because the adhesive is so brittle that there is essentially no adhesive force left.
  • the coated stainless steel housing can also be cooled using a belt freezer. If one starts from a belt freezer with a width of 1.3 m, so that two housings can be transported side by side on the belt, and a length of the freezer of 10 to 12 m, then an average belt speed of 2 m / min results Throughput of 300 pieces / hour
  • the carbon dioxide requirement depends on the initial temperature of the housing. Assuming an initial temperature of plus 20 ° C, then you need about 3.5 to 4 kg of liquid carbon dioxide per housing.
  • the electrical energy requirement is about 12 KW / h.
  • the housings released from the belt conveyor are then freed of the coating by mechanical action, ie hammer blows, the mechanical action also being able to take place by means of suitable machines. From the example numbers above it follows that when using a belt freezer, large numbers can be processed with low energy and carbon dioxide consumption.
  • the single figure shows schematically a section through a body consisting of a metallic carrier material 10, to which a coating 12 to be removed according to the inventive method is glued by means of an adhesive layer 11.
  • cooling gas such as liquid nitrogen
  • the application is also not limited to dishwasher housings; For example, the recycling preparation of underbody protection automotive sheets is mentioned only as a further area of application.

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  • Processing Of Solid Wastes (AREA)
EP92113369A 1991-08-29 1992-08-05 Procédé pour enlever un revêtement collé Withdrawn EP0529363A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914128751 DE4128751A1 (de) 1991-08-29 1991-08-29 Verfahren zum abloesen einer aufgeklebten beschichtung
DE4128751 1991-08-29

Publications (1)

Publication Number Publication Date
EP0529363A1 true EP0529363A1 (fr) 1993-03-03

Family

ID=6439444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113369A Withdrawn EP0529363A1 (fr) 1991-08-29 1992-08-05 Procédé pour enlever un revêtement collé

Country Status (2)

Country Link
EP (1) EP0529363A1 (fr)
DE (1) DE4128751A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3725857A1 (fr) * 2019-04-19 2020-10-21 The Boeing Company Outil de retrait d'adhésif à assistance cryogénique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10128413C1 (de) * 2001-06-12 2002-12-19 Daimler Chrysler Ag Verfahren zum Lösen einer Klebverbindung
CN106707585B (zh) * 2016-12-30 2019-09-13 武汉华星光电技术有限公司 一种面板不良品重工的方法
DE102020003736A1 (de) 2020-06-22 2021-12-23 Mycon Gmbh Vorrichtung und Verfahren zum bauteilschonenden Trennen von Klebverbindungen
WO2021259424A1 (fr) 2020-06-22 2021-12-30 Mycon Gmbh Procédé pour refroidir et/ou séparer des éléments collés et/ou retirer des résidus de colle se trouvant sur des surfaces et dispositif à jet correspondant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH285235A (de) * 1950-10-19 1952-08-31 Kunststoffwerk M & S Gmbh Verfahren zum Entfernen von organischen Überzügen von Oberflächen.
US4487643A (en) * 1983-12-23 1984-12-11 Ellett William A Method and apparatus for removing protective coating from pipe section
EP0368134A1 (fr) * 1988-11-11 1990-05-16 LOLLINI INTERNATIONAL S.p.A. Procédé et appareil de récupération de cuivre de câbles
GB2227541A (en) * 1989-01-31 1990-08-01 Bryan John Cooper Removing a coating from a coated pipe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB844500A (en) * 1958-03-19 1960-08-10 British Oxygen Res And Dev Ltd Method of separating rubber or rubber-like material from metal
US4491484A (en) * 1981-11-24 1985-01-01 Mobile Companies, Inc. Cryogenic cleaning process
DE3212171A1 (de) * 1982-04-01 1983-10-06 Adolf Berkmann Verfahren und vorrichtung zum entfernen von durch nasslackieren oder pulverbeschichten entstandenen lackschichten auf gegenstaenden
DE3415218C2 (de) * 1984-04-21 1986-05-22 Norbert 4600 Dortmund Dünnwald Vorrichtung zum Entfernen von Schutzschichten
DE3612586A1 (de) * 1986-04-15 1987-10-29 Messer Griesheim Gmbh Verfahren zum entfernen von auf der oberflaeche von werkstuecken haftenden materialresten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH285235A (de) * 1950-10-19 1952-08-31 Kunststoffwerk M & S Gmbh Verfahren zum Entfernen von organischen Überzügen von Oberflächen.
US4487643A (en) * 1983-12-23 1984-12-11 Ellett William A Method and apparatus for removing protective coating from pipe section
EP0368134A1 (fr) * 1988-11-11 1990-05-16 LOLLINI INTERNATIONAL S.p.A. Procédé et appareil de récupération de cuivre de câbles
GB2227541A (en) * 1989-01-31 1990-08-01 Bryan John Cooper Removing a coating from a coated pipe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3725857A1 (fr) * 2019-04-19 2020-10-21 The Boeing Company Outil de retrait d'adhésif à assistance cryogénique
CN111824446A (zh) * 2019-04-19 2020-10-27 波音公司 低温辅助的粘合剂去除工具
US10894398B2 (en) 2019-04-19 2021-01-19 The Boeing Company Cryogenic-assisted adhesive removal tool

Also Published As

Publication number Publication date
DE4128751A1 (de) 1993-03-04

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