WO2003008731A1 - A corrugated/undulated sheet having protuberances in the grooves defined by the corrugations; process and apparatus - Google Patents
A corrugated/undulated sheet having protuberances in the grooves defined by the corrugations; process and apparatus Download PDFInfo
- Publication number
- WO2003008731A1 WO2003008731A1 PCT/IT2001/000380 IT0100380W WO03008731A1 WO 2003008731 A1 WO2003008731 A1 WO 2003008731A1 IT 0100380 W IT0100380 W IT 0100380W WO 03008731 A1 WO03008731 A1 WO 03008731A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- protuberances
- sheet
- sheets
- grooves
- ofthe
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/18—Thermoforming apparatus
- B29C51/20—Thermoforming apparatus having movable moulds or mould parts
- B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
- B29C51/225—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis mounted on a vacuum drum
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
- E04C2/322—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with parallel corrugations
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D11/00—Roof covering, as far as not restricted to features covered by only one of groups E04D1/00 - E04D9/00; Roof covering in ways not provided for by groups E04D1/00 - E04D9/00, e.g. built-up roofs, elevated load-supporting roof coverings
- E04D11/02—Build-up roofs, i.e. consisting of two or more layers bonded together in situ, at least one of the layers being of watertight composition
-
- 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
- E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
- E04D3/28—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of glass or other translucent material
-
- 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
- E04D3/36—Connecting; Fastening
- E04D3/3605—Connecting; Fastening of roof covering supported directly by the roof structure
- E04D3/3606—Connecting; Fastening of roof covering supported directly by the roof structure the fastening means being screws or nails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2016/00—Articles with corrugations or pleats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
- B29L2031/104—Tiles
Definitions
- the invention refers to plates or sheets of plastics material with an undulated or "zigzag” or corrugated shape.
- corrugated will be used henceforth to indicate sheets with parallel grooves and ridges with one or more of a variety of possible shapes, that is to say shapes with a sinusoidal or wave-shaped cross-section, shapes with a “zigzag” cross-section, that is with a profile formed by segments at an angle to each other with any configuration, and mixed shapes.
- the ridge parts and the groove parts are longitudinally homogeneous, that is to say with the same cross section along their entire length.
- Prior art sheets are produced by means of a process which comprises a stage of plasticization of the thermoplastic material with an extruder, a stage of rolling ofthe web produced, and a subsequent stage of deformation of the web according to shapes having their axes longitudinal to the web, tlirough a series of roller trains.
- a previous patent application by the same applicant discloses a vacuum forming process by means of counter-rotating rollers, which allows the production of corrugated webs with corrugations lying transversally to the longitudinal direction ofthe web.
- An object of the present invention is therefore to meet the aforementioned needs, in particular by providing corrugated sheets having excellent mechanical strength, easily assemblable with an air gap for good insulation and easy to use for a variety of purposes.
- a further object is to allow industrial production of said sheets in an economically advantageous manner.
- a corrugated sheet according to the invention is shaped with protuberances projecting inside one or more grooves.
- the protuberances are advantageously spaced apart from one another longitudinally and have a height, measured starting from the bottom of the groove, equal to or less than the height of the groove.
- Protuberances can be provided only in the grooves opening on one side of the sheet, or on the grooves opening on both sides of the sheet.
- the protuberances can be hollow or can be filed with stiffening material, for example a plug.
- a web of thermoplastic material at a suitable temperature is deformed between counter-rotating rollers with corrugations transverse to the longitudinal extension of the web, the counter-rotating rollers having cooperating protrusions and recesses to form said protuberances in the sheets.
- the apparatus comprises at least one cooperating forming roller and "drawing" roller provided with corresponding protrusions and recesses, to form said protuberances in the sheets.
- the invention provides plastic sheets having particular strength, able to better withstand being walked upon, and which can be used advantageously in a number of uses, for example for insulation, for roofing and other uses, with better results with respect to prior art materials. Exemplary embodiments of the invention will now be described with reference to the appended illustrative unrestrictive drawings, in which:
- Figure 1 is a perspective view of an example of a corrugated sheet according to the invention, with protuberances lower in height than the grooves
- Figure 2 is a front view ofthe sheet of Figure 1
- Figure 3 is a perspective view showing two coupled overlapping sheets ofthe invention, automatically fixed to each other,
- Figure 4 is a perspective view of a sheet having protuberances of the same height as the grooves and being fixed on joists
- Figure 5 is a view of two coupled sheets with an air gap
- Figure 6 is a profile view of a plurality of sheets coupled in a honeycomb configuration
- Figures 7, 7a show the sheets ofthe invention used as roofing, to support tiles
- Figure 8 shows a corrugated sheet with protuberances
- Figure 9 shows a sheet with opposite protuberances
- Figures 10 and 11 show various types of coupled sheets
- Figure 12 is a perspective view of an apparatus for producting sheets according to the invention.
- Figure 13 is a sectional view taken along a vertical plane through the apparatus of Figure
- a corrugated sheet according to the invention of sheet material, is designated as a whole with reference numeral 10 and has a shape comprising a series of alternating ridges and grooves with parallel axes, substantially equal to each other, each ridge forming a groove on the opposite surface of the sheet and each groove forming a ridge on the opposite surface.
- the example of Figure 1 is a corrugated sheet which has a configuration with a bottom portion of the grooves (and thus the top surfaces of the ridges) substantially flat and with the side walls inclined with respect thereto.
- the groove portions open at the bottom in Figure 1 are designated by 12, the groove portions open at the top in the condition in Figure 1 are designated by 14.
- the sheet has protuberances 16 extending from the bottom of at least some of the grooves 12.
- the protuberances 16 are formed in the sheet material and, at least as regards the example in the figure, have a substantially frustoconical shape, with a circular base, and are spaced apart from each other along the length ofthe groove.
- the protuberances can be of any desired height, not greater than the depth of the groove and preferably substantially equal to that depth.
- sheets with protuberances having bases of any shape, for example square, sheets with protuberances extending from both series of grooves 12 and 14, on one side and the other, sheets with any distribution of the protuberances in the grooves, regular or irregular.
- the sheet in Figure 8 has a shape with sinusoidal corrugations, with protuberances.
- Figure 3 shows two superimposed sheets 10, 10a, having the respective protuberances 16 and 16a nested into one another, to obtain a good adherence ofthe sheets and prevent the sheets from sliding on one another.
- Figure 4 shows a sheet 10b in which the protuberances, of a height corresponding to the depth of the groove in which they are formed, are provided with inserts 18 of a shape corresponding to the hollow of the protuberance, and of relatively stiff material.
- a support 20 such as a board or beam, for example of wood, by means of nails or screws 22.
- a sheet like 10b has optimal resistance when walked upon, as indicate by the shoe drawn with a dashed line thereon.
- Figure 5 shows two sheets according to the invention combined in a facing arrangement to form an air gap therebetween for the purpose of thermal and/or acoustic insulation.
- a top sheet 10c is disposed with the protuberances facing downward
- a bottom sheet lOd is disposed with the protuberances facing upward
- the top of the protuberances of each sheet rests against the top surface of the ridges of the opposite sheet.
- Figure 6 shows a plurality of sheets 10, like the one of Figure 1, referenced 10', 10", 10'", the sheets are combined in an arrangement wherein every two adjacent sheets are opposite to each other forming a cross-sectional honeycomb configuration, so as to increase an air chamber comprised therebetween, for better insulation.
- the combination can be made more stable by applying inserts 24.
- FIGs 7, 7a show, in a perspective view and a top view, respectively, two different types of application of sheets according to the invention, on roof slopes, with the purpose of retaining a cladding of tiles.
- the corrugated sheet, of type 10b in Figure 4 with inserts 18 as explained above with reference to Figure 4, is fixed to the beam 20 by means of nails or the like 22, which also retain per se known tongues 26 for retaining the tiles C. Each tile C is retained by the bent end 26' of the respective tongue, in a per se known manner.
- Figure 9 illustrates a sheet lOe with protuberances 16e on both surfaces.
- the sheets according to the invention can be made in any way accessible to a person skilled in the art, however a procedure and an apparatus particularly suitable for production thereof also form the subject matter ofthe present invention.
- FIGs 12 and 13 an apparatus 50 for continuous production of web to obtain sheets according to the present invention is shown.
- the apparatus comprises two counter- rotating rollers, in particular a forming roller 52 on the bottom in the figure and a roller cooperating in forming, 54, for the sake of convenience called a "drawing" roller, shown in the top position.
- the forming roller 52 has axially extending grooves 55, circumferentially spaced apart by raised parts 56 and has solid end parts 57.
- Each groove has a shape corresponding to the desired corrugation ofthe web and thus ofthe sheet, is connected to a vacuum source (not illustrated), and has axially spaced apart protruding parts or protrusions 58 in at least some of the grooves.
- the protrusions parts have a shape corresponding to the shape of the protuberances it is desired to have on the sheet.
- the drawing roller 54 preferably comprises a series of cylindrical or tubular elements 60 on supporting discs 62 and connected by means of tubes 64 to a cooling system.
- tubular elements are circumferentially spaced from each other at a distance correlated to the circumferential distance of the grooves of the roller 52 with which they cooperate.
- Italian patent application No. M12001A 1108 by the same applicant, which describes similar elements for the production of a corrugated web without protuberances.
- the cylindrical or tubular elements 60 are provided with recesses 66 having shapes and positions corresponding to the protrusions 58 of the roller 52.
- a continuous web of thermoplastic material at a suitable temperature is passed between counter-rotating rollers 52 and 54 and takes the shape of the surface of the forming roller 52 by operation of vacuum applied and by mechanical action of the drawing roller. Downstream of the apparatus 50 the web is cooled, trimmed along the longitudinal edges, and finally cut into sheets.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL15931701A IL159317A0 (en) | 2001-07-18 | 2001-07-18 | A corrugated/undulated sheet having protuberances in the grooves defined by the corrugations, process and apparatus |
PCT/IT2001/000380 WO2003008731A1 (en) | 2001-07-18 | 2001-07-18 | A corrugated/undulated sheet having protuberances in the grooves defined by the corrugations; process and apparatus |
EP01955521A EP1407092A1 (en) | 2001-07-18 | 2001-07-18 | A corrugated/undulated sheet having protuberances in the grooves defined by the corrugations; process and apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2001/000380 WO2003008731A1 (en) | 2001-07-18 | 2001-07-18 | A corrugated/undulated sheet having protuberances in the grooves defined by the corrugations; process and apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003008731A1 true WO2003008731A1 (en) | 2003-01-30 |
Family
ID=11133700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT2001/000380 WO2003008731A1 (en) | 2001-07-18 | 2001-07-18 | A corrugated/undulated sheet having protuberances in the grooves defined by the corrugations; process and apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1407092A1 (en) |
IL (1) | IL159317A0 (en) |
WO (1) | WO2003008731A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004081312A1 (en) * | 2003-03-10 | 2004-09-23 | General Electric Company (A New York Corporation) | Corrugated polymeric zigzag sheet for greenhouse roof structures |
WO2009118168A1 (en) | 2008-03-27 | 2009-10-01 | Grünenthal GmbH | Substituted 4-aminocyclohexane derivatives |
US7977370B2 (en) | 2008-03-27 | 2011-07-12 | Gruenenthal Gmbh | (Hetero)aryl cyclohexane derivatives |
US8288430B2 (en) | 2008-03-27 | 2012-10-16 | Grunenthal Gmbh | Spiro(5.5)undecane derivatives |
US8293758B2 (en) | 2008-03-27 | 2012-10-23 | Grunenthal Gmbh | Substituted spirocyclic cyclohexane derivatives |
US8357705B2 (en) | 2008-03-27 | 2013-01-22 | Gruenenthal Gmbh | Substituted cyclohexyldiamines |
ITUD20110201A1 (en) * | 2011-12-14 | 2013-06-15 | Minini & C S R L Con Unico Socio | THERMOFORMED MULTILAYER PANEL WITH SURFACE SURVEY |
EP3018263A1 (en) * | 2014-11-06 | 2016-05-11 | GIPLAST srl | Panel for the construction of roofing arrangements |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2100660A (en) * | 1981-04-20 | 1983-01-06 | Nissen Kagaku Kogyo Kk | Stamped plastics sheet |
GB2195680A (en) * | 1986-11-27 | 1988-04-13 | Quikspan Construction Limited | Corrugated sheet decking with concrete bonding projections |
-
2001
- 2001-07-18 IL IL15931701A patent/IL159317A0/en unknown
- 2001-07-18 WO PCT/IT2001/000380 patent/WO2003008731A1/en not_active Application Discontinuation
- 2001-07-18 EP EP01955521A patent/EP1407092A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2100660A (en) * | 1981-04-20 | 1983-01-06 | Nissen Kagaku Kogyo Kk | Stamped plastics sheet |
GB2195680A (en) * | 1986-11-27 | 1988-04-13 | Quikspan Construction Limited | Corrugated sheet decking with concrete bonding projections |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004081312A1 (en) * | 2003-03-10 | 2004-09-23 | General Electric Company (A New York Corporation) | Corrugated polymeric zigzag sheet for greenhouse roof structures |
US6959519B2 (en) | 2003-03-10 | 2005-11-01 | General Electric | Corrugated polymeric zigzag sheet for greenhouse roof structures |
WO2009118168A1 (en) | 2008-03-27 | 2009-10-01 | Grünenthal GmbH | Substituted 4-aminocyclohexane derivatives |
US7977370B2 (en) | 2008-03-27 | 2011-07-12 | Gruenenthal Gmbh | (Hetero)aryl cyclohexane derivatives |
US8288430B2 (en) | 2008-03-27 | 2012-10-16 | Grunenthal Gmbh | Spiro(5.5)undecane derivatives |
US8293758B2 (en) | 2008-03-27 | 2012-10-23 | Grunenthal Gmbh | Substituted spirocyclic cyclohexane derivatives |
EP2518052A1 (en) | 2008-03-27 | 2012-10-31 | Grünenthal GmbH | Substituted 4-aminocyclohexane derivatives |
US8357705B2 (en) | 2008-03-27 | 2013-01-22 | Gruenenthal Gmbh | Substituted cyclohexyldiamines |
US8835689B2 (en) | 2008-03-27 | 2014-09-16 | Grünenthal GmbH | Substituted 4-aminocyclohexane derivatives |
US9580386B2 (en) | 2008-03-27 | 2017-02-28 | Grünenthal | Substituted 4-aminocyclohexane derivatives |
ITUD20110201A1 (en) * | 2011-12-14 | 2013-06-15 | Minini & C S R L Con Unico Socio | THERMOFORMED MULTILAYER PANEL WITH SURFACE SURVEY |
EP3018263A1 (en) * | 2014-11-06 | 2016-05-11 | GIPLAST srl | Panel for the construction of roofing arrangements |
Also Published As
Publication number | Publication date |
---|---|
EP1407092A1 (en) | 2004-04-14 |
IL159317A0 (en) | 2004-06-01 |
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