EP0215763A1 - Copper roofing material - Google Patents
Copper roofing material Download PDFInfo
- Publication number
- EP0215763A1 EP0215763A1 EP86850309A EP86850309A EP0215763A1 EP 0215763 A1 EP0215763 A1 EP 0215763A1 EP 86850309 A EP86850309 A EP 86850309A EP 86850309 A EP86850309 A EP 86850309A EP 0215763 A1 EP0215763 A1 EP 0215763A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- copper
- sheeting
- sheet
- produced
- product
- 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- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/02—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant
- E04D3/16—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
- E04D5/04—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of metal foils
Definitions
- the present invention relates to copper sheeting for building purposes, and particularly, although not exclusively, to copper sheeting for use as roofing material.
- Copper sheeting used hitherto for building purposes has the form of a rolled and annealed sheet product (Swedish Standard SS 14 50 13).
- the sheet is rolled from electrolytically produced cathode copper, or from some other refined copper product, which is first remelted and cast to form an ingot and then rolled, in several stages, while in a hot state, at least initially, to the desired thickness, normally 0.6-0.7 mm, whereafter the sheet is annealed, at least in the majority of cases.
- cathode copper or electrolytic copper as designated according to Swedish Standards, is meant here and in the following the refined copper product obtained when raw copper, so-called anode copper, is refined by conventional electrolytic processes. During this electrolytic refinement of the raw copper, the cathode copper is precipitated on mother plates in the form of cathodes placed between anodes of the copper to be refined in the electrolytic cell (anode copper).
- the sheeting is not delivered to the building site in the large rolls into which it is wound when leaving the rolls of the rolling mill, but more often in the form of separate pieces having lengths/widths of 2 m x 1 m.
- Copper is a highly useful building material, since it is impervious to water, has practically unlimited durability and has an aesthetically pleasant surface colouring.
- an electrolytically formed product comprising a sheet of non-remelted cathode or electrolytic copper produced in a limited dimension suitable for direct use.
- the sheet has a thickness of 0.5-1 mm, preferably 0.6-0.8 mm, and a length/width of about 1 m x 1 m.
- the sheets are manufactured by conventional electrolytic copper refining techniques.
- the electrolytic tanks used have a depth which is roughly twice that of conventional tanks, and the dimensions of the anodes and mother plates are adapted accordingly.
- the cathodic copper product is preferably precipitated onto mother plates made of titanium or stainless steel to the thickness desired, and then stripped therefrom manually or mechanically in a conventional manner.
- the mother plates preferably have a length/width of 200 cm x 100 cm and are suspended "on end" in the electrolytic bath.
- the distance between the electrodes may be of the same order of magnitude as that applied with conventional, smaller electrodes, since longer electrodes tend to hang more vertically.
- the surfaces of the resultant cathodic copper sheet, or plate are rougher than the surface of rolled sheet, although this is more of an advantage than a disadvantage in the case of roofing sheets, since rough copper sheeting obtains the desired green patina much more quickly than rolled plate.
- the sheets may be cold-rolled in one or two cold-rolling stages, therewith also increasing the mechanical strength properties of the sheeting at the same time.
- the mechanical properties of the electrolytically formed sheeting are sufficiently high, however, in the absence of such subsequent treatment, as illustrated hereinafter in the following working example, in which the properties of electrolytically produced sheeting are compared with industrial standards for copper-roof sheeting.
- Copper sheeting was produced electrolytically in dimensions of 1000 x 1000 x ⁇ 0.7 mm. Tensile tests, hardness tests, bending tests, and to-and-from bending tests (reverse bending) were carried out in accordance with stan-dardized methods on samples taken from the copper sheet, these samples comprising seven tensile-test rods (sheet sample rods type F) according to SS 11 21 16 and 40 sample rods 100 x 20 x 0.7 mm for bending and reverse bending tests. Prior to carrying out the tests, half of the sample rods used were hardened at 200°C for two hours in an N2 atmosphere.
- the hardness test was carried out in accordance with SS 11 25 17 (Vickers test HV 0.5 ), on the heads of the tensile rods subsequent to negligible polishing of the surfaces.
- the example shows that the mechanical properties of copper sheeting, or plate, according to the invention, which sheeting can be produced much more simply and therewith much more cheaply than conventional copper roofing sheet, are well on a par with conventional copper roofing sheet.
- the elongation limit and the ultimate tensile strength of the inventive product are fully comparable with those of annealed, rolled copper sheet or plate (5013-02), while the elongation values A 50mm and A5 lie inbetween the annealed and cold-worked state (5013-04).
- the hardness HV 0.5 is comparable with that of 5013-04.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Electrolytic Production Of Metals (AREA)
- Laminated Bodies (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
This invention relates to copper sheeting for building purposes, particularly for roofing purposes. The sheeting is characterized in that it comprises non-remelted cathode copper or electrolytic copper produced in dimensions suitably restricted for the purpose intended. The sheeting suitably has a thickness of 0.5-1 mm, preferably 0.6-0.8 mm, and a length/width of approximately 2 m x 1 m.
Description
- The present invention relates to copper sheeting for building purposes, and particularly, although not exclusively, to copper sheeting for use as roofing material.
- Copper sheeting used hitherto for building purposes, e.g. roofing material, has the form of a rolled and annealed sheet product (Swedish Standard SS 14 50 13). The sheet is rolled from electrolytically produced cathode copper, or from some other refined copper product, which is first remelted and cast to form an ingot and then rolled, in several stages, while in a hot state, at least initially, to the desired thickness, normally 0.6-0.7 mm, whereafter the sheet is annealed, at least in the majority of cases. By cathode copper or electrolytic copper, as designated according to Swedish Standards, is meant here and in the following the refined copper product obtained when raw copper, so-called anode copper, is refined by conventional electrolytic processes. During this electrolytic refinement of the raw copper, the cathode copper is precipitated on mother plates in the form of cathodes placed between anodes of the copper to be refined in the electrolytic cell (anode copper).
- The sheeting is not delivered to the building site in the large rolls into which it is wound when leaving the rolls of the rolling mill, but more often in the form of separate pieces having lengths/widths of 2 m x 1 m.
- Copper is a highly useful building material, since it is impervious to water, has practically unlimited durability and has an aesthetically pleasant surface colouring.
- Of course, the use of copper for building purposes is restricted by its high price compared with alternative products. The price of a product produced in the manner described in the introduction is particularly high, the costs entailed therewith including the cost of remelting and casting the raw copper to form ingots, heating the ingots to rolling temperature, and rolling the ingots down to the fine sheet-dimensions required.
- Various ideas as to how the costs entailed when using copper as a building material can be reduced have been previously proposed in the art. One such proposal is found in SE-C-71443 which instead of relatively thick sheets, or plates, recommends the use of thin copper matting which can be glued or likewise bonded to the substratum on which they are laid. According to the proposals set forth in this patent, the copper matting is produced by rolling endless copper strip, or galvanically by precipitating copper onto a drum or a belt, until the desired thickness is reached. These proposals, however, have not resulted in commercial products, probably because the expense involved by rolling the copper to such thin dimensions is excessive, and because of the difficult technical problems encountered when applying the continuous galvanic method.
- Thus, there is on the part of the building industry a desire for less expensive, useful copper products, and on the part of the copper manufacturer a natural desire to expand the market for copper.
- It has now surprisingly been found possible to produce a copper product which solves the aforesaid problems, at least to a substantial extent, since the product lends itself to much lower manufacturing costs than present day commercial roofing material, without departing from the quality requirements placed on building material of this kind be the consumer and by the authorities.
- To this end there is provided in accordance with the invention a copper product having the characteristic features set forth in the following claims.
- Thus, instead of a rolled and optionally annealed product, there is produced an electrolytically formed product comprising a sheet of non-remelted cathode or electrolytic copper produced in a limited dimension suitable for direct use. The sheet has a thickness of 0.5-1 mm, preferably 0.6-0.8 mm, and a length/width of about 1 m x 1 m.
- The sheets are manufactured by conventional electrolytic copper refining techniques. The electrolytic tanks used, however, have a depth which is roughly twice that of conventional tanks, and the dimensions of the anodes and mother plates are adapted accordingly. The cathodic copper product is preferably precipitated onto mother plates made of titanium or stainless steel to the thickness desired, and then stripped therefrom manually or mechanically in a conventional manner.
- The mother plates preferably have a length/width of 200 cm x 100 cm and are suspended "on end" in the electrolytic bath. The distance between the electrodes may be of the same order of magnitude as that applied with conventional, smaller electrodes, since longer electrodes tend to hang more vertically.
- The deviations obtained at the bottom edge of the electrodes are thus comparable with those obtained with conventional electrolysis.
- The surfaces of the resultant cathodic copper sheet, or plate, are rougher than the surface of rolled sheet, although this is more of an advantage than a disadvantage in the case of roofing sheets, since rough copper sheeting obtains the desired green patina much more quickly than rolled plate. When the consumer, or user, requires perfectly flat and smooth sheets, the sheets may be cold-rolled in one or two cold-rolling stages, therewith also increasing the mechanical strength properties of the sheeting at the same time. The mechanical properties of the electrolytically formed sheeting are sufficiently high, however, in the absence of such subsequent treatment, as illustrated hereinafter in the following working example, in which the properties of electrolytically produced sheeting are compared with industrial standards for copper-roof sheeting.
- Copper sheeting was produced electrolytically in dimensions of 1000 x 1000 x∼0.7 mm. Tensile tests, hardness tests, bending tests, and to-and-from bending tests (reverse bending) were carried out in accordance with stan-dardized methods on samples taken from the copper sheet, these samples comprising seven tensile-test rods (sheet sample rods type F) according to SS 11 21 16 and 40 sample rods 100 x 20 x 0.7 mm for bending and reverse bending tests. Prior to carrying out the tests, half of the sample rods used were hardened at 200°C for two hours in an N₂ atmosphere.
- The hardness test was carried out in accordance with SS 11 25 17 (Vickers test HV0.5), on the heads of the tensile rods subsequent to negligible polishing of the surfaces.
-
- The samples were also bent in accordance with SS 11 26 26 and subjected to reverse bending tests in accordance with SS 11 26 23 with no complaints regarding the properties of the sheeting.
- The example shows that the mechanical properties of copper sheeting, or plate, according to the invention, which sheeting can be produced much more simply and therewith much more cheaply than conventional copper roofing sheet, are well on a par with conventional copper roofing sheet. The elongation limit and the ultimate tensile strength of the inventive product are fully comparable with those of annealed, rolled copper sheet or plate (5013-02), while the elongation values A50mm and A₅ lie inbetween the annealed and cold-worked state (5013-04). The hardness HV0.5 is comparable with that of 5013-04.
Claims (4)
1. Copper sheeting for building purposes, particularly for roofing purposes, characterized in that the sheeting comprises non-remelted cathode or electrolytic copper produced in dimensions suitable for the purpose intended.
2. Copper sheeting according to claim 1, characterized in that is has a thickness of 0.5-1 mm, preferably 0.6-0.8 mm.
3. Copper sheeting according to claim 1 or 2, characterized in that it has a length/width of approximately 2 m x 1 m.
4. Copper sheeting according to any of claims 1-3, characterized in that the sheeting has passed through at least one cold-rolling stage.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8504287 | 1985-09-16 | ||
SE8504287A SE8504287L (en) | 1985-09-16 | 1985-09-16 | COPPER PLATE PRODUCT FOR BUILDING DAMAGE, SPECIFIC TO ROOFING |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0215763A1 true EP0215763A1 (en) | 1987-03-25 |
Family
ID=20361413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86850309A Withdrawn EP0215763A1 (en) | 1985-09-16 | 1986-09-15 | Copper roofing material |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0215763A1 (en) |
DK (1) | DK443486A (en) |
ES (1) | ES2000883A6 (en) |
FI (1) | FI863698A (en) |
GR (1) | GR862291B (en) |
NO (1) | NO863679L (en) |
SE (1) | SE8504287L (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE644631C (en) * | 1937-05-10 | Ver Deutsche Metallwerke Akt G | Single layer metal cover to be laid in place | |
DE2732758A1 (en) * | 1977-07-20 | 1979-02-08 | Kabel Metallwerke Ghh | ROOF COVER |
-
1985
- 1985-09-16 SE SE8504287A patent/SE8504287L/en not_active Application Discontinuation
-
1986
- 1986-09-08 GR GR862291A patent/GR862291B/en unknown
- 1986-09-10 ES ES8601770A patent/ES2000883A6/en not_active Expired
- 1986-09-12 FI FI863698A patent/FI863698A/en not_active Application Discontinuation
- 1986-09-15 EP EP86850309A patent/EP0215763A1/en not_active Withdrawn
- 1986-09-15 NO NO863679A patent/NO863679L/en unknown
- 1986-09-16 DK DK443486A patent/DK443486A/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE644631C (en) * | 1937-05-10 | Ver Deutsche Metallwerke Akt G | Single layer metal cover to be laid in place | |
DE2732758A1 (en) * | 1977-07-20 | 1979-02-08 | Kabel Metallwerke Ghh | ROOF COVER |
Non-Patent Citations (1)
Title |
---|
Ullmanns Encyklopadie der technischen Chemie, 4., neubearbeitete und erweiterte Auflage, Band 15, Verlag Chemie GmbH, D-6940 Weinheim, 1978. *Pages 529-533 * * |
Also Published As
Publication number | Publication date |
---|---|
NO863679D0 (en) | 1986-09-15 |
DK443486D0 (en) | 1986-09-16 |
NO863679L (en) | 1987-03-17 |
FI863698A (en) | 1987-03-17 |
SE8504287D0 (en) | 1985-09-16 |
ES2000883A6 (en) | 1988-03-16 |
DK443486A (en) | 1987-03-17 |
FI863698A0 (en) | 1986-09-12 |
GR862291B (en) | 1987-01-02 |
SE8504287L (en) | 1987-03-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19870928 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BJOERNBERG, ARNE |