EP0629157A1 - Method of removal of paint etcetera from a timber element and equipment for practising the method - Google Patents
Method of removal of paint etcetera from a timber element and equipment for practising the methodInfo
- Publication number
- EP0629157A1 EP0629157A1 EP93905737A EP93905737A EP0629157A1 EP 0629157 A1 EP0629157 A1 EP 0629157A1 EP 93905737 A EP93905737 A EP 93905737A EP 93905737 A EP93905737 A EP 93905737A EP 0629157 A1 EP0629157 A1 EP 0629157A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paint
- oven
- removal
- etcetera
- timber
- 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
Links
- 239000003973 paint Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 6
- 210000000056 organ Anatomy 0.000 claims 3
- 239000007769 metal material Substances 0.000 claims 1
- 239000011521 glass Substances 0.000 abstract description 17
- 238000010438 heat treatment Methods 0.000 description 29
- 235000021388 linseed oil Nutrition 0.000 description 7
- 239000000944 linseed oil Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 238000009418 renovation Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 238000013021 overheating Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 208000008454 Hyperhidrosis Diseases 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 230000035900 sweating Effects 0.000 description 2
- BBRBUTFBTUFFBU-LHACABTQSA-N Ornoprostil Chemical compound CCCC[C@H](C)C[C@H](O)\C=C\[C@H]1[C@H](O)CC(=O)[C@@H]1CC(=O)CCCCC(=O)OC BBRBUTFBTUFFBU-LHACABTQSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B44D3/166—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning by heating, e.g. by burning
- B44D3/168—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning by heating, e.g. by burning by electrically heating
-
- 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
- B44D3/166—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning by heating, e.g. by burning
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/80—Apparatus for specific applications
Definitions
- the present invention relates to a method of removal of paint etcetera from window frames and other timber elements.
- the invention also relates to equipment for practising the .invention.
- Chlorinated solvents are technically efficient, but imply unacceptable health and environmental risks.
- the method according to the invention is characterized by a step in which the timber element is introduced into an oven in which at least the paint and the outer layer of the tim ⁇ ber is heated, and by a soonest after following step in which paint and/or similar material such as e.g. putty is removed mechanically by known technique(s) before the ele- ment is cooled to room temperature.
- the inventors have tested the removal of paint and putty from vindow frames after heating in a convection oven and hereby experienced that the time required for the remo ⁇ val is considerably reduced, probably to half or less com ⁇ pared to the time required for similar xemoval after heating by means of a flame or a hot air jet. ----
- Is the element heated in a micro wave oven are several ad- vantages obtained.
- the heating is accomplished not only by thermal conduction from the surfaces of the element towards the inner parts but is instantly generated through a layer of material of may be one cm or more.
- the timber technologi- cal advantages are known.
- Regarding the paint and putty re ⁇ moval we have demonstrated, that after heating in a micro wave oven to a temperature at which the element may just be handled by a nacked hand and shows no sign of blistering, in most cases is easy and fast done.
- Just some types of paint requires heating to a temperature at which a gloved hand is necessary for the handling. No glass panes mounted in window frames, which we have treated in this way, have broken.
- the equipment according to the invention is characterized by an oven with an oven chamber that large, that the element will fit in it without direct mechanical contact with any oven surface, and by a work space for the removal of paint etcetera located in the vincity of the oven so that a heatet element can be tooled before any chilling of significance for the removal of the paint etcetera has occured.
- Such an oven can ensure the introduction and the extraction respec ⁇ tively of the element to be without risk of depositing soft ⁇ ened paint etcetera in the oven, and an even heat treatment of the element.
- the required speedy execution of the methods second step is made possible, and a rationel industrial re ⁇ moval of paint etcetera can thus be established.
- the heating time especially in a hot air oven, for many ele ⁇ ments such as window frames and door leaves, is a- number of times the period typically required for the removal work.
- An optimised production flow is therefore achievable by means of equipment according to claim 6.
- the inventors have, as stated, proved specific advantages in case the heating of the element is generated by micro waves. Particular advantages are realised in case the element com ⁇ prise a fixed glass pane.
- the equipment according to claim 7 is advantageous because they allow for the heating of the element by means of micro waves. It is also an advantage, that heating in a micro wave oven can be accomplished quick ⁇ ly. A single micro wave oven may thus produce heated ele ⁇ ments for a number of paint removal stations.
- a particularly simpel and safe control of the heating of elements is based on the weight of the element.
- the moisture content of the timber is also of some importance. If the equipment comprises apparatuses for the controlling of weight and/or of moisture content is an expedient and simpel heating control made possible.
- du ⁇ ring renovation works on old windows in existing buildings.
- the administrative registration and the transportation re ⁇ quired for this type of jobs can be simplified considerably by utilisation of equipment according to claim 9.
- the technique according to the invention do not introduce any new type of waste in carpentry work shops, which are ta ⁇ king on removal of paint etcetera by mechanical methods. Un ⁇ controlled oil penetration into the timber implying risk of sweating through new paint cover, and risk of spontaneous ignition of waste impregnated with linseed oil are not existing. Over-heating damages of timber is eliminated, the heating and thus the removal work is industrially control1- able and therefore allows for an even quality compared to a manually controlled heating by means of a flame or a hot air jet. Exhalations or the formation of oil vapour is pro- nouncely reduced or eliminated compared to the known techni ⁇ ques. Solvents comprising fire-, health-, and/or environmen- ⁇ tal risks are not to be found during the practising of the invention. The removal process is more cost efficient compa ⁇ red to the known techniques.
- FIG. 1 a diagram illustrating a workshop arrangement for removal of paint etcetera from window panes and door leaves accor ⁇ ding to the invention. ⁇
- figur 1 is 1 an A-shaped stand on the sides of which win ⁇ dow frames and door leaves to be treated are placed.
- 2 is a scale for the checking of each elements weight.
- 3 is a micro wave oven for the heating of the elements which are to have paint etcetera removed.
- the oven 3 has an efficient oven chamber 120 cm wide, 80 cm high and 240 cm long. A large oven is advantageous because it allows for the 0 heating of a large element.
- the oven material is not heated, so the loss of energy from the oven is not significantly in ⁇ creased by increased size of oven.
- the oven 3 is designed according to known technique regarding micro wave ovens for the drying of timber.
- each paint removal station is thus equipped wi h a rigid work bench comprising fixing tools for the fixing of elements during the removal of paint etcetera, and providing a convenient working hight. Alloca ⁇ ted to each paint removal station 4 is also known tools such as scrapers etcetera and work gloves for the handling of warm elements.
- 5 is a stand, which is of similar design to the design of stand 1. Stand 5 is used for storing treated elements.
- a window frame which after dismounting of all metallic fittings, has been placed on the stand 1, is carried to the scale 2 for checking of its weight and of the moisture con ⁇ tent of its timber.
- a typical window frame the size of 50 x 9 ⁇ cm designed with one horisontal glazing bar and two glass panes each the thickness of 2 mm weighs about 5 kilo ⁇ grammes.
- the moisture content may be aproximately 2 ⁇ %.
- the window frame is placed horisontally in the oven 3 in order to be heated. Based on the weight and moisture content, and on successively collected experience is such an oven setting chosen, which within 4 minutes will produce the heating of the timber in the window frame to a temperature, at which the frame may just be handled by an ungloved hand.
- the heated window frame is carried to a paint removal sta ⁇ tion 4 and is clamped to the work bench the glass grove fa ⁇ cing upwards. Paint covering the upwards facing surfaces is scraped off, and putty is removed e.g. by means of a putty knife. The glass pins now freely accessible are removed.
- the window frame is undamped and turned upside down. Using a knife with a blade bend in an angel is each glass pane in turn loosened from the window frame. When a glass pane is loosing its adherence to to the window frame it is falling to the work bench from where it is removed, marked with win ⁇ dow frame indentification markings, and taken to a storrage ⁇
- the window frame - now without glass panes - is now ridded of paint and left over putty, and is thereafter placed on stand 5.
- the inventors have tested the method according to the inven ⁇ tion using window frames and door leaves of various origin. Different types of paints varies in ease of removal. By testing we have compared the labour required for processing identically painted identical elements and demonstrated, that the removal of paint etcetera according to the inven ⁇ tion typically requires half the labour or less compared to the combined requirement for the ridding of profiled surfa- ces using a hot air jet, and sanding of larger plane surfa ⁇ ces using band sanding. All glass panes fitted in the test elements were removed unbroken and could be refitted in all tests. Tests demonstrates, that the paint normally is easily scraped off during a period of 10 - 12 minutes after ter i- nation of the heating. This span of time was sufficient for the finishing of the work on window frames designed with one or two window panes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Surface Treatment Of Glass (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9200684A SE470255B (en) | 1992-03-06 | 1992-03-06 | Method and apparatus for removing paint from wood elements |
SE9200684 | 1992-03-06 | ||
PCT/SE1993/000190 WO1993017882A1 (en) | 1992-03-06 | 1993-03-05 | Method of removal of paint etcetera from a timber element and equipment for practising the method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0629157A1 true EP0629157A1 (en) | 1994-12-21 |
EP0629157B1 EP0629157B1 (en) | 1998-06-17 |
Family
ID=20385529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93905737A Expired - Lifetime EP0629157B1 (en) | 1992-03-06 | 1993-03-05 | Method of mechanical removal of paint and putty from a timber element and equipment for carrying out the method |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0629157B1 (en) |
AT (1) | ATE167437T1 (en) |
AU (1) | AU3654793A (en) |
CA (1) | CA2131445A1 (en) |
DE (1) | DE69319228T2 (en) |
DK (1) | DK0629157T3 (en) |
ES (1) | ES2120496T3 (en) |
HU (1) | HU213518B (en) |
SE (1) | SE470255B (en) |
WO (1) | WO1993017882A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2785572B1 (en) * | 1998-11-05 | 2000-12-29 | Traitement Ind Des Metaux | PROCESS FOR STRIPPING WOODEN PAINTED OBJECTS AND DEVICE FOR CARRYING OUT SAID METHOD |
FR2785571B1 (en) * | 1998-11-05 | 2002-05-31 | Traitement Ind Des Metaux | PROCESS FOR STRIPPING WOODEN PAINTED OBJECTS |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1038458A (en) * | 1976-03-08 | 1978-09-12 | Michael Hamid | Microwave paint dryer |
DE3518725A1 (en) * | 1985-05-24 | 1986-11-27 | Eisenmann Maschinenbaugesellschaft mbH, 7030 Böblingen | Process and apparatus for the thermal removal of paint residues on equipment components |
GB8810490D0 (en) * | 1988-05-04 | 1988-06-08 | Ashdown N M | Stripper device |
-
1992
- 1992-03-06 SE SE9200684A patent/SE470255B/en not_active IP Right Cessation
-
1993
- 1993-03-05 AU AU36547/93A patent/AU3654793A/en not_active Abandoned
- 1993-03-05 ES ES93905737T patent/ES2120496T3/en not_active Expired - Lifetime
- 1993-03-05 AT AT93905737T patent/ATE167437T1/en not_active IP Right Cessation
- 1993-03-05 DK DK93905737T patent/DK0629157T3/en active
- 1993-03-05 CA CA002131445A patent/CA2131445A1/en not_active Abandoned
- 1993-03-05 HU HU9402561A patent/HU213518B/en not_active IP Right Cessation
- 1993-03-05 WO PCT/SE1993/000190 patent/WO1993017882A1/en active IP Right Grant
- 1993-03-05 DE DE69319228T patent/DE69319228T2/en not_active Expired - Fee Related
- 1993-03-05 EP EP93905737A patent/EP0629157B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9317882A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1993017882A1 (en) | 1993-09-16 |
SE9200684D0 (en) | 1992-03-06 |
EP0629157B1 (en) | 1998-06-17 |
DE69319228T2 (en) | 1999-01-07 |
AU3654793A (en) | 1993-10-05 |
HU213518B (en) | 1997-07-28 |
DE69319228D1 (en) | 1998-07-23 |
ES2120496T3 (en) | 1998-11-01 |
DK0629157T3 (en) | 1999-04-06 |
SE470255B (en) | 1993-12-20 |
HU9402561D0 (en) | 1994-11-28 |
ATE167437T1 (en) | 1998-07-15 |
CA2131445A1 (en) | 1993-09-16 |
HUT68842A (en) | 1995-08-28 |
SE9200684L (en) | 1993-09-07 |
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