FR2474950A1 - METHOD FOR MANUFACTURING A HONEYCOMB STRUCTURE - Google Patents
METHOD FOR MANUFACTURING A HONEYCOMB STRUCTURE Download PDFInfo
- Publication number
- FR2474950A1 FR2474950A1 FR8102235A FR8102235A FR2474950A1 FR 2474950 A1 FR2474950 A1 FR 2474950A1 FR 8102235 A FR8102235 A FR 8102235A FR 8102235 A FR8102235 A FR 8102235A FR 2474950 A1 FR2474950 A1 FR 2474950A1
- Authority
- FR
- France
- Prior art keywords
- sheets
- corrugated
- stack
- honeycomb structure
- flat
- 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- Withdrawn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
-
- 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 form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D3/00—Making articles of cellular structure, e.g. insulating board
- B31D3/005—Making cellular structures from corrugated webs or sheets
-
- 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 form; Layered products 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 form; Layered products 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 form; Layered products 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
-
- 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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
-
- 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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- 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
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/02—Cellular or porous
- B32B2305/024—Honeycomb
Abstract
Description
On sait que les matériaux d'âme les plus utilisés pour l'élaboration d'éléments sandwich à performancesmécaniques élevées sont les structures alvéolées, dites "nids d'abeilles". We know that the core materials most used for the development of sandwich elements with high mechanical performance are honeycomb structures, called "honeycombs".
La fabrication de ces structures s'effectue actuellement suivant deux méthodes : l'une dite "par corrugation", l'autre "par expansion", et chacune d'elles présente des in convénients. The manufacture of these structures is currently carried out according to two methods: one called "by corrugation", the other "by expansion", and each of them has disadvantages.
Dans la méthode dite "par corrugation", le matériau, en feuilles ou en film, après être passé dans un dispositif onduleur, reçoit sur le sommet des ondulations un dépôt de colle. tes feuilles ondulées et encollées doivent ensuite etre empilées les unes sur les autres, de telle sorte que chaque sommet d'ondulation coincide exactement avec le sommet de la feuille opposée. L'ensemble doit être maintenu ainsi jusqu'à séchage ou polymérisation de l'adhésif. In the so-called "corrugation" method, the material, in sheets or in film, after passing through an inverter device, receives on the top of the corrugations a deposit of glue. your corrugated and glued sheets should then be stacked on top of each other, so that each wavy top coincides exactly with the top of the opposite sheet. The assembly must be maintained in this way until the adhesive has dried or polymerized.
Ce procédé d'élaboration, relativement lent, a été presque complètement abandonné au profit du procédé "par expansion. This relatively slow production process has been almost completely abandoned in favor of the "expansion" process.
Dans le procédé "par expansion", le dépôt de colle s'effectue sur feuilles ou film plans à l'aide d'une machine à imprimer dont on peut mettre à profit la grande vitesse de marche. Les feuilles planes sont empilées, après encollage, de telle sorte que les lignes de colle déposées par l'imprimeuse soient placées aux endroits adéquats pour qu'il suffise, après que l'adhésion des feuilles entre elles a été rendue effective par le séchage ou la polymérisation de l'adhésif, d'exercer une traction entre les premières et dernières feuilles d'un bloc, pour obtenir, par expansion, la formation de cellules à la forme hexagonale. In the "expansion" process, the adhesive is deposited on flat sheets or film using a printing machine which can be used at high speed. The flat sheets are stacked, after gluing, so that the lines of glue deposited by the printer are placed in the adequate places to suffice, after the adhesion of the sheets to each other has been made effective by drying or the polymerization of the adhesive, to exert a traction between the first and last sheets of a block, to obtain, by expansion, the formation of cells with the hexagonal shape.
Ce procédé autorise une vitesse de fabrication plus rapide que le procédé par corrugation, mais il requiert la mise en oeuvre d'adhésif dont la résistance au pelage doit être d'autant plus élevée que les matériaux à expanser sont difficiles à plier. De plus, la connaissance des adhésifs les plus performants dans ce domaine est jalousement tenue secrète par les fabricants de structures "nid d'abeilles. This process allows a faster manufacturing speed than the corrugation process, but it requires the use of adhesive, the peel strength of which must be higher the more the materials to be expanded are difficult to fold. In addition, knowledge of the most effective adhesives in this area is jealously kept secret by manufacturers of honeycomb structures.
La présente invention a précisément pour but de pallier les difficultés engendrées, dans le procédé "par corru gation", par la nécessité d'empiler les feuilles successives sommets d'ondulation contre sommets opposés et, dans le procédé "par expansion", par le fait qu'on est limité dans le choix des matériaux de base par suite de là faiblesse des adhésifs réalisant le joint collé. The object of the present invention is precisely to alleviate the difficulties caused, in the "corruption" process, by the need to stack the successive sheets with wavy vertices against opposite vertices and, in the "expansion" process, by fact that we are limited in the choice of base materials due to the weakness of the adhesives making the glued joint.
Elle a pour objet un procédé de fabrication d'une structure alvéolée, selon lequel on empile des feuilles ondulées qu'on lie au moyen d'un enduit adhésif, -caractérisé en ce qu'on forme une pile composée de feuilles alternativement planes et ondulées, et en ce qu'on applique à la pile un enduit recouvrant toutes les surfaces exposées des feuilles. It relates to a method of manufacturing a honeycomb structure, according to which we stack corrugated sheets which we bind by means of an adhesive coating, -characterized in that we form a stack made up of alternately flat and wavy sheets , and in that a coating is applied to the pile covering all the exposed surfaces of the sheets.
te dessin annexé représente, schématiquement et à titre d'exemple, une forme d'exécution d'une structure alvéolée à plusieurs stades de sa fabrication selon le procédé faisant l'objet de l'invention. The attached drawing shows, schematically and by way of example, an embodiment of a honeycomb structure at several stages of its manufacture according to the process which is the subject of the invention.
Les figures 1 et 2 représentent en coupe transversale l'empilage de feuilles alternativement planes et ondulées. Figures 1 and 2 show in cross section the stack of alternately flat and wavy sheets.
La figure 3 illustre en perspective la pile obtenue. Figure 3 illustrates in perspective the stack obtained.
La figure 4 est une vue en coupe transversale d'une portion de structure alvéolée obtenue par le procédé. Figure 4 is a cross-sectional view of a portion of the honeycomb structure obtained by the method.
En référence au dessin, on réalise une structure alvéolée à partir de paires de feuilles i constituées chacune par une feuille ondulée 2 et une feuille plane 3 collées 1'une contre l'autre. With reference to the drawing, a honeycomb structure is produced from pairs of sheets i each consisting of a corrugated sheet 2 and a flat sheet 3 glued one against the other.
Les paires de feuilles 1 sont empilées en alternant les feuilles ondulées 2 et les feuilles planes 3, et en disposant les génératrices des ondulations 4 des feuilles ondulées 2 sensiblement parallèlement les unes aux autres. La pile 5 ainsi obtenue est naitee pour que les sommets des ondulations 4 des feuil?es ondule 2 oient en contact avec les feuilles planes 3 a9JaceAtes, zizis est plongée dans un bain de résine synthétique. La pile 5 peut être serrée par un outillage approprié ou par des liens 6 entourant tout 1'empilage. On peut disposer des plaques rigides 7 contre deux faces opposées de la pile 5 pour répartir la force de serrage des liens 6.De préférence, ces plaques 7 sont en une ma tière sur laquelle la résine synthétique n'a pas d'adhérence. The pairs of sheets 1 are stacked by alternating the corrugated sheets 2 and the flat sheets 3, and by placing the generatrices of the corrugations 4 of the corrugated sheets 2 substantially parallel to each other. The pile 5 thus obtained is born so that the tops of the corrugations 4 of the corrugated sheets 2 come into contact with the flat sheets 3 a9JaceAtes, zizis is immersed in a bath of synthetic resin. The stack 5 can be clamped by an appropriate tool or by ties 6 surrounding the entire stack. Rigid plates 7 can be placed against two opposite faces of the stack 5 to distribute the tightening force of the links 6. Preferably, these plates 7 are made of a material on which the synthetic resin has no adhesion.
Après que la résine synthétique a eu le temps d'imprégner les feuilles 2 et 3, la pile est émergée du bain et est égouttée.After the synthetic resin has had time to impregnate the sheets 2 and 3, the pile has emerged from the bath and is drained.
Elle est alors placée dans des conditions permettant la prise de la résine synthétique par séchage ou par polymérisation.It is then placed in conditions allowing the setting of the synthetic resin by drying or by polymerization.
De façon connue, le bloc de structure alvéolée obtenu est ensuite coupé en planches d'épaisseur voulue selon les plans de coupe sensiblement perpendiculaires aux génératrices des ondulations 4. In known manner, the block of honeycomb structure obtained is then cut into boards of desired thickness according to the cutting planes substantially perpendicular to the generatrices of the corrugations 4.
Comme le montre la figure 4 qui représente le produit fini, la résine synthétique forme une couche 8 recouvrant toutes les surfaces exposées des feuilles 2 et 3. Sous l'effet de sa tension superficielle à l'état liquide et par capillarité, la résine synthétique s'accumule dans les zones de contact entre les feuilles planes 3 et les feuilles ondulées 2 et forme des ponts de liaison 9 entre les feuilles ondulées 2 et les feuilles planes 3 adjacentes lorsqu'elle est sèche ou polymérisée. As shown in FIG. 4 which represents the finished product, the synthetic resin forms a layer 8 covering all the exposed surfaces of the sheets 2 and 3. Under the effect of its surface tension in the liquid state and by capillarity, the synthetic resin accumulates in the contact zones between the flat sheets 3 and the corrugated sheets 2 and forms connecting bridges 9 between the corrugated sheets 2 and the adjacent flat sheets 3 when it is dry or polymerized.
La structure alvéolée obtenue par le procédé décrit ci-dessus présente des caractéristiques mécaniques spécifiques similaires à celles des structures "nids d'abeilles" à cellules hexagonales. L'anisotropie de la structure alvéolée est toutefois plus marquée que celle des structures en "nids d'abeilles" de forme hexagonale. The honeycomb structure obtained by the process described above has specific mechanical characteristics similar to those of "honeycomb" structures with hexagonal cells. The anisotropy of the honeycomb structure is however more marked than that of the hexagonal "honeycomb" structures.
Le procédé décrit permet d'obtenir à moindre coat une structure alvéolée de même qualité mécanique que les structures alvéolées à cellules hexagonales. En effet, grace à la présence de feuilles planes 3 entre les feuilles ondulées 2, la mise en place des feuilles successives formant la pile 5 ne nécessite pas le repérage précis requis pour faire colncider exavteant les sommets adjacents des cellules ou des dlatios comme c'est le cas dans les fabrications habitueiles de structures "nids d'abeilles" corruguées ou expansées. On se libère, suivant le procédé décrit ci-dessus, d'un processus relativement lent et sophistiqué inhérent aux fabrications de structures "nids d'abeilles" à cellules hexagonales expansées. The process described makes it possible to obtain, with a lower coat, a honeycomb structure of the same mechanical quality as honeycomb structures with hexagonal cells. Indeed, thanks to the presence of flat sheets 3 between the corrugated sheets 2, the establishment of the successive sheets forming the stack 5 does not require the precise location required to make the adjacent vertices of cells or dlatios coincide, like this. is the case in the usual manufacture of corrugated or expanded "honeycomb" structures. One frees oneself, according to the method described above, from a relatively slow and sophisticated process inherent in the manufacture of "honeycomb" structures with expanded hexagonal cells.
Une grande gamme de matériaux peut être utilisée pour élaborer ladite structure suivant le procédé décrit. On peut mettre en oeuvre, par exemple, des feuilles ou films en matières plastiques, en papiers, en cartons ou en feuillards métalliques. Il devient possible de réaliser économiquement à partir de feuilles ou films de matériaux difficilement pliables, des structures alvéolées à petites ondulations, ce qui est techniquement exclu, actuellement, par le procédé dit "par expansion". A wide range of materials can be used to develop said structure according to the process described. It is possible to use, for example, sheets or films of plastics, paper, cardboard or metal strips. It becomes possible to economically produce from sheets or films of difficultly foldable materials, honeycomb structures with small corrugations, which is technically excluded, at present, by the process known as "by expansion".
La viscosité et la nature du bain de résine synthétique dans lequel sera plongé l'empilage des feuilles planes et ondulées formant le bloc 5 seront choisies suivant les constituants des feuilles 2 et 3, de telle sorte quton obtienne la formation de ponts de liaison 9 suffisamment efficaces pour assurer la cohésion du bloc 5 et communiquer à la structure alvéolée, après séchage et polymérisation de la résine, les caractéristiques mécaniques et physiques recherchées. The viscosity and the nature of the synthetic resin bath in which the stack of flat and corrugated sheets forming the block 5 will be immersed will be chosen according to the constituents of the sheets 2 and 3, so that the connection bridges 9 are formed sufficiently effective for ensuring the cohesion of block 5 and communicating to the honeycomb structure, after drying and polymerization of the resin, the desired mechanical and physical characteristics.
On peut prévoir de nombreuses variantes dans la constitution de structures alvéolées suivant procédé décrit. There can be many variations in the construction of honeycomb structures according to the method described.
La pile 5 pourrait être réalisée à partir de feuilles planes 3 et ondulées 2 en matériaux différents.The stack 5 could be produced from flat sheets 3 and corrugated sheets 2 made of different materials.
On pourrait envisager l'empilage de feuilles ondulées 2 présentant des ondulations 4 de différentes dimensions dans un même empilement 5, de façon à obtenir une structure alvéolée présentant des zones renforcées et des zones allégées. One could consider stacking corrugated sheets 2 having corrugations 4 of different dimensions in the same stack 5, so as to obtain a honeycomb structure having reinforced areas and lightened areas.
Dans un même but, on pourrait prévoir d'utiliser des feuilles en une matière plus rigide ou plus légère dans la formation d'une Fartie de la pile 5. For the same purpose, provision could be made to use sheets of a more rigid or lighter material in the formation of a portion of the stack 5.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH93580 | 1980-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2474950A1 true FR2474950A1 (en) | 1981-08-07 |
Family
ID=4198596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8102235A Withdrawn FR2474950A1 (en) | 1980-02-06 | 1981-02-05 | METHOD FOR MANUFACTURING A HONEYCOMB STRUCTURE |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3104022A1 (en) |
| FR (1) | FR2474950A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002039A1 (en) * | 1984-10-05 | 1986-04-10 | Isosport Verbundbauteile Ges.M.B.H. | New light construction core, method for making the same, composite body, particularly ski comprising such a core |
| WO1998004401A1 (en) * | 1996-07-30 | 1998-02-05 | Swap Technology Ag | Core of corrugated cardboard, method and apparatus for its manufacture |
| AT406825B (en) * | 1998-07-15 | 2000-09-25 | Fischer Gmbh | HOCKEY RACKETS |
| WO2007025707A1 (en) * | 2005-08-29 | 2007-03-08 | Rainer Kehrle | Method and device for producing corrugated-board-like composite material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104669690A (en) * | 2015-02-12 | 2015-06-03 | 应树丰 | Production method and production device for full-automatic high-speed vertical corrugated board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2299155A1 (en) * | 1975-01-29 | 1976-08-27 | Jeanneau Const Nautiques Sa | Sandwich structure material forming process - with layers placed together for fill liquid impregnation and setting |
-
1981
- 1981-02-05 FR FR8102235A patent/FR2474950A1/en not_active Withdrawn
- 1981-02-05 DE DE19813104022 patent/DE3104022A1/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2299155A1 (en) * | 1975-01-29 | 1976-08-27 | Jeanneau Const Nautiques Sa | Sandwich structure material forming process - with layers placed together for fill liquid impregnation and setting |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002039A1 (en) * | 1984-10-05 | 1986-04-10 | Isosport Verbundbauteile Ges.M.B.H. | New light construction core, method for making the same, composite body, particularly ski comprising such a core |
| WO1998004401A1 (en) * | 1996-07-30 | 1998-02-05 | Swap Technology Ag | Core of corrugated cardboard, method and apparatus for its manufacture |
| EA000656B1 (en) * | 1996-07-30 | 1999-12-29 | Свэп Текнолоджи Аг | Core of corrugated cardboard, method and for its manufacture |
| AU718267B2 (en) * | 1996-07-30 | 2000-04-13 | Swap Technology Ag | Core of corrugated cardboard, method and apparatus for its manufacture |
| AT406825B (en) * | 1998-07-15 | 2000-09-25 | Fischer Gmbh | HOCKEY RACKETS |
| WO2007025707A1 (en) * | 2005-08-29 | 2007-03-08 | Rainer Kehrle | Method and device for producing corrugated-board-like composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3104022A1 (en) | 1981-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |