GB2222791A - A method of bending sandwich plates - Google Patents

A method of bending sandwich plates Download PDF

Info

Publication number
GB2222791A
GB2222791A GB8920727A GB8920727A GB2222791A GB 2222791 A GB2222791 A GB 2222791A GB 8920727 A GB8920727 A GB 8920727A GB 8920727 A GB8920727 A GB 8920727A GB 2222791 A GB2222791 A GB 2222791A
Authority
GB
United Kingdom
Prior art keywords
bending
sandwich plate
metal sheet
groove
sandwich
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Withdrawn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
GB8920727A
Other versions
GB8920727D0 (en
Inventor
Karl Grosch
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.)
Erbsloeh Aluminium GmbH
Original Assignee
Julius and August Erbsloeh GmbH and Co
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 Julius and August Erbsloeh GmbH and Co filed Critical Julius and August Erbsloeh GmbH and Co
Publication of GB8920727D0 publication Critical patent/GB8920727D0/en
Publication of GB2222791A publication Critical patent/GB2222791A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/20—Bending sheet metal, not otherwise provided for
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B29C53/06—Forming folding lines by pressing or scoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • 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
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

2,21791 A METHOD OF BENDING SANDWICH PLATES The present invention relates
to a method of bending sandwich plates or composite panels formed, more especially, from two metal sheets, which are spaced apart from each other and are interconnected by means of a layer of plastics material, a bending groove being introduced into the sandwich plate on its inner surface with respect to the bending, and the outer surface of the sandwich plate being bent round said groove.
In order to bend sandwich plates, it is known to introduce a V-shaped bending groove into the inner surface thereof, so that the inner metal sheet is entirely discontinued at the bending location, and at least a portion of the layer of plastics material is also removed. In addition, the walls of the bending groove are to be disposed at such an angle relative to each other that the angle, which combines to form 1800 for such purpose, corresponds to the angle which is desired between the bent walls of the plate.
An object of the present invention is to provide a method of bending sandwich plates without the inner metal sheet needing to be severed in the region of the bending location - which severance reduces stability - and yet a definite bending zone is established..
According to the invention, this object is achieved when the bending groove is formed by stamping the inner metal sheet and, during the subsequent bending operation, such groove is shaped or deformed to form a fold which penetrates the layer of plastics material. In consequence, the bending location can be clearly established without the inner metal sheet being severed. Because the inner metal sheet of the sandwich plate has previously been stamped. a fold is formed on the inner metal sheet during the subsequent bending operation at the bending location and extends into the region of the intermediate space between the metal sheets, which space is filled by the layer of plastics material. On the one hand, this arrangement retains the material in the inner metal sheet of the sandwich plate and, on the- other hand, the inner corner region remains free of any wall portions protruding inwardly.
It is self-evident that the walls of the sandwich plate, which are formed by the bending location, may lie at an obtuse angle relative to each other when the bending operation is interrupted once the desired obtuse angle has been attained. However, it is also possible to continue the bending operation until the walls of the sandwich plate, produced by the bending location, assume a right angle relative to each other.
However, it is also possible to produce a quasi large radius of curvature on the outer surface of the sandwich plate at the bending location, instead of the small radius of curvature being produced with a 900 bend on the outer surface of the bending location; this is preferably achieved when a plurality of bending grooves are introduced into the inner metal sheet adjacent one another with a small spacing therebetween, so that, during the subsequent bending operation5 a bending region is established with a quasi large radius of curvature on the outer metal sheet.
1 11 The bending operation is advantageously assisted when the metal sheet on the outer surface of the sandwichplate is thicker than the metal sheet on the inner surface of the sandwich plate. In such a case, the layer of plastics material between the metal sheets may advantageously be formed from a hardening foam material.
A bending region for the sandwich plate, which is produced in accordance with the method, is shown in two embodiments in the drawing and is explained more fully hereinafter.
In the drawing:
Fig. 1 is a cross-sectional view of an unbent sandwich plate; Fig. 2 is a cross-sectional view of the sandwich plate shown in Fig. 1, wl'th a bending groove having been introduced in the inner metal sheet of the plate; Fig. 3 is a cross-sectional view of the sandwich plate shown in Fig. 2, where a 900 bending location with a small radius of curvature has been produced on the outer metal sheet; Fig. 4 shows an alternative embodiment of the bending location on a sandwich plate, where a quasi large radius of curvature has been produced on the outer metal sheet of the sandwich plate at the bending location as a result of a plurality of bending grooves having been introduced in the inner metal sheet.
The sandwich plate comprises two metal sheets 10 and 11, which are spaced apart from each other5 this space being filled by a layer of. plastics material 12, by means of which the inner metal sheet 10 and the outer metal sheet 11 are also interconnected. The layer of plastics material 12 may advantageously be a hardening, foamable plastics material, such as polyurethane foam, for example.
In order to permit the sandwich plate, which is formed from the metal sheets 10 and 11 and the layer of plastics material 12, to be bent, a bending groove 13 is initially provided in the inner metal sheet 10 at the desired location, by means of a stamping operation5 for example (Fig. 2), and finally the sandwich plate is bent round said groove until the walls 14 and 15 produced by the bending location - as is apparent in Fig. 3 assume a right angle relative to each other. However, it is also possible to dispose the walls 14 and 15 at an obtuse angle relative to each other as a result of the bending operation being terminated prior to the walls attaining their 900 position. During the bending operation, a fold 16 is produced on the inner metal sheet 10 at the bending location, and it is embedded in the layer of plastics material 16 after the bending operation.
In the embodiment shown in Fig. 4, a plurality of bending grooves 13, which are disposed adjacent one another with'a small spacing therebetween, are introduced into the inner metal sheet 10 on the inner surface of the sandwich plate in a first working operation. During the subsequent bending operation, a relatively large radius of curvature is produced on the outer metal sheet 11 between the walls 14 and 15 of the sandwich plate, which have been produced by the bending location. The embodiment shown in Fig. 4 has a total of five bending grooves 13, which are disposed adjacent one another with a small spacing therebetween. It is possible to provide even more bending grooves adjacent one anothery so that an even greater radius of curvature than that shown in Fig. 4 is produced at the bending location.
As already mentioned, the embodiments which are illustrated and described above only represent the invention by way of example, and the invention is in no way solely restricted thereto.

Claims (8)

1. A method of bending sandwich plates formed, more especially, from two metal sheets, which are spaced apart from each other and are interconnected by means of a layer of plastics material, a bending groove being introduced into the sandwich plate on its inner surface with respect to the bending, and the outer surface of the sandwich plate being bent round said groove, wherein the bending groove is formed by stamping the inner metal sheet and.
during the subsequent bending operation, such groove is shaped to form a fold which penetrates the layer of plastics material.
2. A method as claimed in claim 1, wherein a plurality of bending grooves are introduced into the inner metal sheet adjacent one another with a small spacing therebetween and, during the subsequent bending operation, a bending region is produced with a large radius of curvature.
A method of bending a sandwich plate as claimed in claim 1 or 2, wherein the metal sheet on the outer surface of the sandwich plate is thicker than the metal sheet on the inner surface of the sandwich plate.
4. A method of bending a sandwich plate as claimed in any one of claims 1 to 3, wherein the layer of plastics material between the metal sheets is formed from a hardening foam material.
j
5. A method of bending a sandwich plate as claimed in any one of claims 1 to 4, wherein the bending angley subtended by the plate walls is greater than 901 after the bending operation.
6. A method of bending a sandwich plate as claimed in any one of claims 1 to 4, where in the bending angle, subtended by the plate walls is 900 af ter the bending operation.
A method of bending a sandwich plate substantially as hereinbefore described with reference to the accompanying drawings.
8. A sandwich plate, whenever produced by a method as claimed in any preceding claim.
Publia-hed.1990 at ThePatent=ce. State House. &17t 1-r-i4g.iHclbtrn. LondonWClA4TP Purrher copies may be obtainedfrom The Patent OMOO, Sales Branch. St MLr7 Cray. Orpmgton. K!r-,. BIRZ 3FLD. Printed by Multiplex t8cbluclues ltd. St MLr7 Cray, Kent, CorL 1 a7
GB8920727A 1988-09-15 1989-09-13 A method of bending sandwich plates Withdrawn GB2222791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3831363A DE3831363A1 (en) 1988-09-15 1988-09-15 METHOD FOR BENDING SANDWICH PLATES

Publications (2)

Publication Number Publication Date
GB8920727D0 GB8920727D0 (en) 1989-10-25
GB2222791A true GB2222791A (en) 1990-03-21

Family

ID=6363001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8920727A Withdrawn GB2222791A (en) 1988-09-15 1989-09-13 A method of bending sandwich plates

Country Status (5)

Country Link
DE (1) DE3831363A1 (en)
ES (1) ES2016061A6 (en)
FR (1) FR2636255A1 (en)
GB (1) GB2222791A (en)
IT (1) IT1231695B (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5843353A (en) * 1995-04-13 1998-12-01 Imperial Chemical Industries Plc Non-planar evacuated insulation panels and a method for making same
WO2003033832A1 (en) 2001-10-19 2003-04-24 Saes Getters S.P.A. Process for manufacturing a flexible thermoinsulating device and so obtained device
US20110123780A1 (en) * 2008-05-09 2011-05-26 Thyssenkrupp Steel Europe Ag Method for Forming a Crimping Fold in a Multi-Layer Composite Material and Multi-Layer Composite Material Having at Least One Crimping Fold
DE10234409B4 (en) * 2002-07-29 2012-03-22 Va-Q-Tec Ag Vacuum insulation panel with indentations on the edges
JP2014152830A (en) * 2013-02-06 2014-08-25 Samsung Electronics Co Ltd Vacuum heat insulation material, heat insulation box body, and refrigerator
EP2765375A3 (en) * 2013-02-06 2017-05-31 Samsung Electronics Co., Ltd Vacuum insulation material, insulation case unit, and refrigerator
USD820647S1 (en) 2017-05-16 2018-06-19 Yeti Coolers, Llc Insulating device
USD820648S1 (en) 2017-05-16 2018-06-19 Yeti Coolers, Llc Insulating device
USD821156S1 (en) 2017-05-16 2018-06-26 Yeti Coolers, Llc Insulating device
USD821157S1 (en) 2017-05-16 2018-06-26 Yeti Coolers, Llc Insulating device
USD821155S1 (en) 2017-05-16 2018-06-26 Yeti Coolers, Llc Insulating device
USD821824S1 (en) 2017-05-16 2018-07-03 Yeti Coolers, Llc Insulating device
US10676267B2 (en) 2015-11-25 2020-06-09 Yeti Coolers, Llc Insulating container having vacuum insulated panels and method

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739579B1 (en) * 1995-10-04 1997-12-26 Lorraine Laminage METHOD AND DEVICE FOR FOLDING ALONG A GENERATOR OF A METAL BLANK WITH MULTILAYER STRUCTURE AND METAL BLANK WITH MULTILAYER STRUCTURE OBTAINED BY THIS METHOD
NL1002541C2 (en) * 1996-03-06 1997-09-09 Unfolding V O F Method for roughing metal / plastic sandwich material for the production thereof of three-dimensional objects.
ATE302684T1 (en) * 1996-07-18 2005-09-15 Alcan Tech & Man Ag COMPOSITE BOARD
FR2760983B1 (en) * 1997-03-18 1999-06-04 Lorraine Laminage PROCESS FOR FOLDING A RIGID-CORE SANDWICH PANEL
DE102004057854A1 (en) * 2004-12-01 2006-06-08 Technische Universität Dresden Semi-finished product for use in cabinetry, has bar-shaped or lamellar units with rectangular cross section such that two semi-finished halves are joined by adhesive material provided on side surface of units
ITMO20110180A1 (en) * 2011-07-25 2013-01-26 Giuseppe Librizzi METHOD TO REALIZE A SQUARE OR RECTANGULAR SECTION DUCT SO OBTAINED
DE102016201638A1 (en) * 2016-02-03 2017-08-03 Thyssenkrupp Ag Method for producing a profile from a sandwich material, profile from a sandwich material and its use
DE102016214016A1 (en) 2016-07-29 2018-02-01 Thyssenkrupp Ag Method for producing a component from a sandwich material, its use and a production plant for producing a component from a sandwich material
DE102021133745A1 (en) 2021-12-17 2023-06-22 Gregor Endres core composite structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1431668A (en) * 1972-07-05 1976-04-14 Gen Electric Bending of structural panels
GB1481712A (en) * 1976-02-19 1977-08-03 Rule & Son Ltd G Methods and apparatus for bending tubes

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US1999314A (en) * 1933-09-05 1935-04-30 Anderson Frohman Method of cutting and forming the parts of toys and other articles from cardboard
FR1260187A (en) * 1960-03-25 1961-05-05 Renault Process for obtaining profiled elements from flat composite panels and profiled elements obtained by this process
US3687170A (en) * 1970-10-26 1972-08-29 Ind Insulations Inc Heat insulating assembly
US3757559A (en) * 1972-02-09 1973-09-11 Hughes Aircraft Co Method for making structural panel bent from laminated honeycomb
US3866523A (en) * 1973-05-30 1975-02-18 Lancaster Research And Dev Cor Method and apparatus for forming bulk containers from articulatable composite panels
US4262514A (en) * 1979-10-22 1981-04-21 H. H. Robertson Company Method and apparatus for bending a laminated panel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1431668A (en) * 1972-07-05 1976-04-14 Gen Electric Bending of structural panels
GB1481712A (en) * 1976-02-19 1977-08-03 Rule & Son Ltd G Methods and apparatus for bending tubes

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0820568B2 (en) † 1995-04-13 2003-03-19 Huntsman International Llc Method for producing non-planar evacuated insulation panels
US5843353A (en) * 1995-04-13 1998-12-01 Imperial Chemical Industries Plc Non-planar evacuated insulation panels and a method for making same
WO2003033832A1 (en) 2001-10-19 2003-04-24 Saes Getters S.P.A. Process for manufacturing a flexible thermoinsulating device and so obtained device
DE10234409B4 (en) * 2002-07-29 2012-03-22 Va-Q-Tec Ag Vacuum insulation panel with indentations on the edges
US20110123780A1 (en) * 2008-05-09 2011-05-26 Thyssenkrupp Steel Europe Ag Method for Forming a Crimping Fold in a Multi-Layer Composite Material and Multi-Layer Composite Material Having at Least One Crimping Fold
US9873237B2 (en) * 2008-05-09 2018-01-23 Thyssenkrupp Steel Europe Ag Method for forming a crimping fold in a multi-layer composite material and multi-layer composite material having at least one crimping fold
JP2014152830A (en) * 2013-02-06 2014-08-25 Samsung Electronics Co Ltd Vacuum heat insulation material, heat insulation box body, and refrigerator
EP2765375A3 (en) * 2013-02-06 2017-05-31 Samsung Electronics Co., Ltd Vacuum insulation material, insulation case unit, and refrigerator
US10676267B2 (en) 2015-11-25 2020-06-09 Yeti Coolers, Llc Insulating container having vacuum insulated panels and method
US11279546B2 (en) 2015-11-25 2022-03-22 Yeti Coolers, Llc Insulating container having vacuum insulated panels and method
USD820647S1 (en) 2017-05-16 2018-06-19 Yeti Coolers, Llc Insulating device
USD821157S1 (en) 2017-05-16 2018-06-26 Yeti Coolers, Llc Insulating device
USD821155S1 (en) 2017-05-16 2018-06-26 Yeti Coolers, Llc Insulating device
USD821824S1 (en) 2017-05-16 2018-07-03 Yeti Coolers, Llc Insulating device
USD821156S1 (en) 2017-05-16 2018-06-26 Yeti Coolers, Llc Insulating device
USD910382S1 (en) 2017-05-16 2021-02-16 Yeti Coolers, Llc Insulating device
USD820648S1 (en) 2017-05-16 2018-06-19 Yeti Coolers, Llc Insulating device
USD992359S1 (en) 2017-05-16 2023-07-18 Yeti Coolers, Llc Insulating device

Also Published As

Publication number Publication date
IT8921696A0 (en) 1989-09-13
ES2016061A6 (en) 1990-10-01
FR2636255A1 (en) 1990-03-16
GB8920727D0 (en) 1989-10-25
DE3831363A1 (en) 1990-03-29
IT1231695B (en) 1991-12-20

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)