EP1944141B1 - Method for manufacturing seat shells - Google Patents

Method for manufacturing seat shells Download PDF

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Publication number
EP1944141B1
EP1944141B1 EP08000422A EP08000422A EP1944141B1 EP 1944141 B1 EP1944141 B1 EP 1944141B1 EP 08000422 A EP08000422 A EP 08000422A EP 08000422 A EP08000422 A EP 08000422A EP 1944141 B1 EP1944141 B1 EP 1944141B1
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EP
European Patent Office
Prior art keywords
layers
bonding
flocking
layer
pressure
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Not-in-force
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EP08000422A
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German (de)
French (fr)
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EP1944141A3 (en
EP1944141A2 (en
Inventor
Thomas Vogelbacher
Klaus-Peter Grasse
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Sedus Stoll AG
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Sedus Stoll AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/14—Chairs of special materials characterised by the use of laminated wood

Definitions

  • the present invention relates to a method for producing bent, multi-layered seat shells according to the preamble of claim 1. Such a method is DE 145 49 88 A1 known.
  • the gluing of the individual layers takes place in large presses, wherein the layers are pressed from their initially flat shape at the same time in the desired curved final shape of the seat.
  • High-pressure laminates High Pressure Laminates
  • the outer layers which may consist of colored papers impregnated with synthetic resin, such as melamine, because they have very good and durable surface properties. The surface does not have to be aftertreated in this case.
  • Melamine is compatible with common wood glue.
  • presses for gluing such layers by means of wood glue are in particular high-frequency presses, in which the wood glue is heated due to the water contained in it by the high-frequency radiation and thereby activated.
  • the press and the individual layers - at least when they are essentially dry - are less affected by the high-frequency radiation and remain relatively cold.
  • DE 1 454 988 describes a method for producing a seat shell in which several layers of fiber-reinforced thermoplastics are heated to the plastic flow and then deformed under low pressure.
  • the seats are superficially smooth and thus quite slippery. It is known to apply an anti-slip on the seat, but this requires a subsequent operation.
  • the invention has as its object to provide a rational method for producing an improved seat shell of the type mentioned, which is not slippery at least in the area of the seat and also looks good and appealing.
  • the solution of this task according to the invention is that at least one of the two outer layers of the seat shell is provided on the outside before gluing with the other layers in still flat or one-dimensional bent state at least part of the surface with a flocking.
  • the layer to be flocked is provided with an adhesive application, after which fibers are applied to this adhesive application. Under the action of electrostatic forces, the fibers align themselves perpendicularly to the adhesive application and are fixed in this position during setting or when solidifying the adhesive. The result is a velvety surface.
  • the flocking is virtually unaffected by the subsequent pressure and heat treatment in the press to glue the multiple plies and retains virtually 100% of its beneficial properties. This is especially true if the gluing is performed in such a high frequency press that the individual layers including the Belockung and the press remain relatively cold and immediately practically only the glue is heated and this only to an activation temperature of 100 ° C. for
  • the adhesive application must be carried out using a sufficiently heat-resistant adhesive which is not adversely affected by the heat applied during the gluing of the layers. Suitable
  • two-component adhesives which have a heat resistance greater than 100 °.
  • the fibers used must also be sufficiently heat-resistant. Fibers made of a polyamide, such as polyamide 6.6, which have this property are particularly suitable for use in the process according to the invention.
  • the application of the adhesive as well as of the fibers is substantially facilitated by the "flat state" of the layer to be flocked, wherein the term "flat state” should also include a one-dimensionally bent state of the layer, so that the layer is e.g. how a sheet of paper could be redirected around a roll in a printer while being coated with the adhesive and / or fibers.
  • the application of adhesive can be applied over the entire surface of the surface to be flocked by brushing or spraying. Preferably, however, it is applied only over part of the area, for which the screen printing process is particularly suitable. It can also be decorative surface patterns and with appropriate color choice of the fibers and interesting to be flocked position color contrasts are generated.
  • the flocking layer being very thin with a thickness of e.g. only about 1 mm can be performed.
  • the flocking layer may also be substantially thicker, e.g. up to 4 mm thick.
  • the thickness depends on the length of the fibers, the fibers being used in the process according to the invention e.g. may have a length between 0.5 - 4 mm and a thickness of 1 - 20 dtex. Particular preference is given to fibers of about 1 mm in length and about 3.3 dtex in thickness.
  • the flocking of the type considered are extremely durable, hard-wearing and abrasion-resistant and are good upholstery in durability and durability not inferior. They are air-conditioning, easy to clean, waterproof, skin-friendly, protective and equal tolerances. They contain enough air to prevent sweating, which is of particular importance for seats.
  • Fig. 1 1 denotes a layer of a high pressure laminate (HPL) based on a plurality of kraft papers impregnated with melamine resin. The individual layers of the high-pressure laminate are not shown.
  • the thickness of the layer 1 is for example 0.6 mm.
  • the layer 1 could be a so-called endless web, which in Fig. 1 running from left to right through the area shown and, for example, unrolled in front of the area shown on the left of a roll and cut to the right behind the area shown in individual pieces.
  • the layer 1 is provided over the entire surface by brushing with an adhesive 3 and thus coated under a fiber application device 4 moves through.
  • the application device 4 short, negatively charged fibers 5 are uniformly applied to the lying at a positive potential layer 1. Due to the electrostatic charge, the fibers 5 are aligned parallel to one another perpendicular to the layer 1.
  • the fibers 5 With the setting or hardening of the adhesive of the adhesive application 3, the fibers 5 are fixed. Excess, not fixed fibers 7 are finally removed by suction with a suction device 6. On the layer 1 results in a velvety flock 8.
  • Fig. 2 shows a layer 1 with a flocking 8 as the top layer of a package from a total of 7 not yet interconnected layers, the flocking 8 is on the outside.
  • the inner layers, designated in total by 9, are, for example, thin wooden furs with a thickness of, for example, 1.2 mm.
  • the bottommost layer 10 could, like the uppermost layer, consist of a high-pressure laminate, but this is provided on the outside instead of with a flocking, for example with a printed or colored decorative layer 11. However, flocking would also be possible here.
  • a seat shell 14 can be made, for example, for a chair.
  • Fig. 3 schematically shows such a press 12 in the still open state, in which a package 13 from several layers according to Fig. 2 is inserted.
  • the glue required for bonding between the layers is not shown.
  • the thin and thus flexible layers adapt when inserted into the press essentially already to their desired final shape.
  • the press 12 is preferably a high-frequency press and the glue is a water-based wood glue.
  • Fig. 4 shows under a) a finished seat 14 with seat 15 and backrest 16, as shown by the gluing of the package 13 in the molding press 12 of Fig. 3 results.
  • the seat shell 14 is on one side over the entire surface, on the top of the seat 15 and the front of the backrest 16, provided with a flock 8.
  • the flock 8 applied prior to gluing on the uppermost layer 1 was not affected by the pressing process in the press 12.
  • FIG. 4 shows under b) a corresponding Embodiment.
  • c) and d) shows Fig. 4 two further examples in which a partial area flocking pattern is applied on a partial surface such as the seat surface 15, namely in the form of several strips in Fig. 4c) and in the form of a dot pattern in Fig. 4 d) ,
  • a different application technique such as the screen printing technique must be used in softer remaining patterns can be produced.
  • the flocking may contrast in color to non-flocked surfaces.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The method involves gluing the several layers of the seat shell together using pressure and heat. It involves providing at least one of the two outer layers of the seat shell with flocking on the exterior surface prior to gluing to the other layers over at least part of its surface while still flat.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung gebogener, mehrlagig aufgebauter Sitzschalen gemäß dem Oberbegriff des Anspruchs 1. Ein solches Verfahren ist aus DE 145 49 88 A1 bekannt.The present invention relates to a method for producing bent, multi-layered seat shells according to the preamble of claim 1. Such a method is DE 145 49 88 A1 known.

STAND DER TECHNIKSTATE OF THE ART

Das Verleimen der einzelnen Lagen erfolgt in grossen Pressen, wobei die Lagen aus ihrer zunächst flachen Form gleichzeitig in die gewünschte gebogene Endform der Sitzschale gepresst werden.The gluing of the individual layers takes place in large presses, wherein the layers are pressed from their initially flat shape at the same time in the desired curved final shape of the seat.

Als Material für die Lagen werden meist Holzfumiere eingesetzt, wobei dann die Sitzschalen als Holzpressschalen oder als Sperrholzformschalen bezeichnet werden. Für die äusseren Lagen werden gerne auch Hochdrucklaminate (HPL = High Pressure Laminates) verwendet, die aus ggf. gefärbten und mit Kunstharz wie Melamin imprägnierten Kraftpapieren bestehen, weil diese sehr gute und dauerhafte Oberflächeneigenschaften aufweisen. Die Oberfläche muss in diesem Fall auch nicht mehr nachbehandelt werden. Melamin verträgt sich gut mit üblichem Holzleim.As material for the layers mostly wood furs are used, in which case the seats are referred to as wood press shells or as plywood shell molds. High-pressure laminates (HPL = High Pressure Laminates) are also often used for the outer layers, which may consist of colored papers impregnated with synthetic resin, such as melamine, because they have very good and durable surface properties. The surface does not have to be aftertreated in this case. Melamine is compatible with common wood glue.

Als Pressen zum Verleimen von solchen Lagen mittels Holzleim eignen sich insbesondere Hochfrequenzpressen, in welchen der Holzleim aufgrund des in ihm enthaltenen Wassers durch die Hochfrequenzstrahlung erwärmt und dadurch aktiviert wird. Die Presse sowie die einzelnen Lagen - zumindest wenn die diese im wesentlichen trocken sind - werden durch die Hochfrequenzstrahlung weniger beeinflusst und bleiben relativ kalt.As presses for gluing such layers by means of wood glue are in particular high-frequency presses, in which the wood glue is heated due to the water contained in it by the high-frequency radiation and thereby activated. The press and the individual layers - at least when they are essentially dry - are less affected by the high-frequency radiation and remain relatively cold.

Zum Pressen werden Drücke zwischen 100 - 200 N/cm2, insbesondere von 200 N/cm2, angewendet bei Temperaturen zwischen 60 - 100°C.For pressing pressures between 100 - 200 N / cm 2 , in particular of 200 N / cm 2 , applied at temperatures between 60 - 100 ° C.

DE 1 454 988 beschreibt ein Verfahren zur Herstellung einer Sitzschale bei welchem mehrere Lagen Faserverstärkte Thermoplasten bis zum plastischen Fliessem erhitzt und anschliessend unter geringem Druck verformt werden. DE 1 454 988 describes a method for producing a seat shell in which several layers of fiber-reinforced thermoplastics are heated to the plastic flow and then deformed under low pressure.

Die so hergestellten Sitzschalen sind oberfächlich glatt und dadurch ziemlich rutschig. Bekannt ist das Auftragen eines Antirutschlacks auf die Sitzfläche, was jedoch einen nachträglichen Arbeitsgang erfordert.The seats are superficially smooth and thus quite slippery. It is known to apply an anti-slip on the seat, but this requires a subsequent operation.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Die Erfindung stellt sich die Aufgabe, ein rationelles Verfahren zur Herstellung einer verbesserten Sitzschale der eingangs genannten Art anzugeben, die zumindest im Bereich der Sitzfläche nicht rutschig ist und die zudem gut und ansprechend aussieht.The invention has as its object to provide a rational method for producing an improved seat shell of the type mentioned, which is not slippery at least in the area of the seat and also looks good and appealing.

Die Lösung dieser Aufgabe besteht erfindungsgemäss darin, dass wenigstens eine der beiden äusseren Lagen der Sitzschale aussenseitig vor dem Verleimen mit den anderen Lagen im noch flachen oder eindimensional gebogenen Zustand zumindest teilflächig mit einer Beflockung versehen wird.The solution of this task according to the invention is that at least one of the two outer layers of the seat shell is provided on the outside before gluing with the other layers in still flat or one-dimensional bent state at least part of the surface with a flocking.

Verfahren zur Beflockung sind Stand der Technik. Zum Beflocken wird die zu beflockende Lage mit einem Klebstoffauftrag versehen, wonach Fasern auf diesen Klebstoffauftrag aufgebracht werden. Unter der Wirkung elektrostatischer Kräfte richten sich die Fasern senkrecht auf dem Klebstoffauftrag aus und werden beim Abbinden bzw. bei der Verfestigung des Klebers in dieser Stellung fixiert. Das Resultat ist eine samtige Oberfläche.Methods for flocking are state of the art. For flocking, the layer to be flocked is provided with an adhesive application, after which fibers are applied to this adhesive application. Under the action of electrostatic forces, the fibers align themselves perpendicularly to the adhesive application and are fixed in this position during setting or when solidifying the adhesive. The result is a velvety surface.

Wie sich überraschenderweise herausgestellt hat, wird die Beflockung durch die nachfolgende Druck- und Wärmebehandlung in der Presse zur Verleimung der mehreren Lagen so gut wie nicht beeinträchtigt und behält praktisch zu 100% ihre vorteilhaften Eigenschaften. Dies gilt insbesondere, wenn das Verleimen derart in einer Hochfrequenzpresse durchgeführt wird, dass die einzelnen Lagen einschliesslich der Belockung sowie auch die Presse relativ kalt bleiben und unmittelbar praktisch nur der Leim erhitzt wird und dies auch nur auf eine Aktivierungstemperatur von maximal 100°C.Für den Klebstoffauftrag muss im Rahmen des erfindungsgemässen Verfahrens ein ausreichend wärmebeständiger Klebstoff verwendet werden, welcher durch die beim Verleimen der Lagen angewandte Wärme nicht beeinträchtigt wird. Geeignet hierfür sind insbesondere Zweikomponentenkleber, die eine Wärmebeständigkeit grösser als 100° aufweisen. Die verwendeten Fasern müssen natürlich ebenfalls ausreichend wärmebeständig sein. Zur Verwendung im Rahmen des erfindungsgemässen Verfahrenes eignen sich insbesondere Fasern aus einem Polyamid wie z.B. Polyamid 6.6, welche diese Eigenschaft aufweisen.As has been surprisingly found, the flocking is virtually unaffected by the subsequent pressure and heat treatment in the press to glue the multiple plies and retains virtually 100% of its beneficial properties. This is especially true if the gluing is performed in such a high frequency press that the individual layers including the Belockung and the press remain relatively cold and immediately practically only the glue is heated and this only to an activation temperature of 100 ° C. for In the context of the process according to the invention, the adhesive application must be carried out using a sufficiently heat-resistant adhesive which is not adversely affected by the heat applied during the gluing of the layers. Suitable For this purpose, in particular two-component adhesives, which have a heat resistance greater than 100 °. Of course, the fibers used must also be sufficiently heat-resistant. Fibers made of a polyamide, such as polyamide 6.6, which have this property are particularly suitable for use in the process according to the invention.

Das Aufbringen des Klebstoffs sowie der Fasern wird durch den "flachen Zustand" der zu beflockenden Lage wesentlich erleichtert, wobei der Begriff des "flachen Zustandes" auch einen eindimensional gebogenen Zustand der Lage mit umfassen soll, so dass die Lage z.B. wie ein Papierbogen in einem Drucker um eine Rolle umgelenkt und dabei mit dem Klebstoff und/oder den Fasern beschichtet werden könnte.The application of the adhesive as well as of the fibers is substantially facilitated by the "flat state" of the layer to be flocked, wherein the term "flat state" should also include a one-dimensionally bent state of the layer, so that the layer is e.g. how a sheet of paper could be redirected around a roll in a printer while being coated with the adhesive and / or fibers.

Der Klebstoffauftrag kann durch Aufstreichen oder Aufsprühen ganzflächig auf der zu beflockenden Lage aufgebracht werden. Bevorzugt wird er jedoch nur teilflächig aufgebracht, wozu sich besonders das Siebdruckverfahren eignet. Es können auch dekorative Flächenmuster und bei geeigneter Farbwahl der Fasern und der zu beflockenden Lage interessante Farbkontraste erzeugt werden.The application of adhesive can be applied over the entire surface of the surface to be flocked by brushing or spraying. Preferably, however, it is applied only over part of the area, for which the screen printing process is particularly suitable. It can also be decorative surface patterns and with appropriate color choice of the fibers and interesting to be flocked position color contrasts are generated.

Wie sich weiter herausgestellt hat, kann als Material für die zu betlockende/n Lage/n ein Hochdrucklaminat der eingangs erwähnten Art z.B. mit einer Dicke zwischen 0.3 und 0.9 mm verwendet werden. Bei lediglich teilflächiger Beflockung hat dies den Vorteil, dass die freiliegenden, nicht beflockten Bereiche die guten Oberflächeneigenschaften dieses Materials aufweisen und keiner Nachbehandlung bedürfen.As has further been found, as the material for the layer (s) to be blocked, a high-pressure laminate of the type mentioned in e.g. be used with a thickness between 0.3 and 0.9 mm. With only partial flocking this has the advantage that the exposed, non-flocked areas have the good surface properties of this material and require no post-treatment.

Durch die Beflockung ergibt sich, wie bereits erwähnt, eine dekorative, samtige Oberfläche, wobei die Beflockungsschicht sehr dünn mit einer Dicke von z.B. nur ca. 1 mm ausgeführt werden kann. Die Beflockungsschicht kann bei Bedarf jedoch auch wesentlich dicker, z.B. bis 4 mm dick, ausgeführt werden. Die Dicke hängt ab von der Länge der Fasern, wobei die Fasern im Rahmen des erfindungsgemässen Verfahrens z.B. eine Länge zwischen 0.5 - 4 mm und eine Stärke von 1 - 20 dtex aufweisen können. Besonders bevorzugt sind Fasern von ca. 1 mm Länge und ca. 3.3 dtex Stärke.The flocking results, as already mentioned, in a decorative, velvety surface, the flocking layer being very thin with a thickness of e.g. only about 1 mm can be performed. However, if desired, the flocking layer may also be substantially thicker, e.g. up to 4 mm thick. The thickness depends on the length of the fibers, the fibers being used in the process according to the invention e.g. may have a length between 0.5 - 4 mm and a thickness of 1 - 20 dtex. Particular preference is given to fibers of about 1 mm in length and about 3.3 dtex in thickness.

Die Beflockungen der betrachteten Art sind äusserst langlebig, strapazierfähig und abriebfest und stehen guten Polsterstoffen in der Belastbarkeit und Dauerhaftigkeit nicht nach. Sie wirken klimatisierend, sind leicht zu reinigen, wasserfest, hautsympatisch,schützend und gleichen Toleranzen aus. Sie enthalten genügend Luft, um Schwitzen zu verhindern, was bei Sitzschalen von besonderer Bedeutung Ist.The flocking of the type considered are extremely durable, hard-wearing and abrasion-resistant and are good upholstery in durability and durability not inferior. They are air-conditioning, easy to clean, waterproof, skin-friendly, protective and equal tolerances. They contain enough air to prevent sweating, which is of particular importance for seats.

KURZE ERLÄUTERUNG DER FIGURENBRIEF EXPLANATION OF THE FIGURES

Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen im Zusammenhang mit der Zeichnung näher erläutert werden. Es zeigen:

Fig. 1
den Vorgang der Beflockung;
Fig. 2
in einem Teilschnitt mehrere Lagen einer Sitzschale vor ihrer Verklebung, wobei die oberste Lage beflockt ist;
Fig. 3
die Lagen von Fig. 2 eingelegt In eine noch geöffnete Presse; und
Fig.4
unter a) - d) fertige Sitzschalen mit unterschiedlichen Beflockungsmustern.
The invention will be explained in more detail with reference to embodiments in conjunction with the drawings. Show it:
Fig. 1
the process of flocking;
Fig. 2
in a partial section, several layers of a seat before their bonding, the top layer is flocked;
Fig. 3
the layers of Fig. 2 inserted In an open press; and
Figure 4
under a) - d) finished seats with different flocking patterns.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

In Fig. 1 bezeichnet 1 eine Lage eines dünnen Hochdrucklaminats (HPL = High Pressure Laminates) auf der Basis von mehreren Kraftpapieren, welche mit Melamin-Kunstharz imprägniert sind. Die einzelnen Schichten des Hochdrucklaminats sind nicht dargestellt. Die Dicke der Lage 1 beträgt beispielsweise 0.6 mm. Die Lage 1 könnte eine sogenannte Endlosbahn sein, die in Fig. 1 von links nach rechts durch den dargestellten Bereich läuft und z.B. links vor dem dargestellten Bereich von einer Rolle abgewickelt und rechts hinter dem dargestellten Bereich in einzelne Stücke abgelängt wird.In Fig. 1 1 denotes a layer of a high pressure laminate (HPL) based on a plurality of kraft papers impregnated with melamine resin. The individual layers of the high-pressure laminate are not shown. The thickness of the layer 1 is for example 0.6 mm. The layer 1 could be a so-called endless web, which in Fig. 1 running from left to right through the area shown and, for example, unrolled in front of the area shown on the left of a roll and cut to the right behind the area shown in individual pieces.

Mit einem Rakel 2 wird die Lage 1 durch Aufstreichen vollflächig mit einem Klebstoffauftrag 3 versehen und so beschichtet unter einer Faser-Applikationsvorrichtung 4 hindurchbewegt. Mit der Applikationsvorrichtung 4 werden kurze, negativ aufgeladene Fasern 5 gleichmässig auf die an positivem Potential liegende Lage 1 aufgebracht. Durch die elektrostatische Ladung richten sich die Fasern 5 parallel zueinander senkrecht auf der Lage 1 aus. Mit dem Abbinden bzw. Aushärten des Klebers des Klebstoffauftrags 3 werden die Fasern 5 fixiert. Überschüssige, nicht fixierte Fasern 7 werden schliesslich durch Absaugen mit einer Saugvorichtung 6 entfernt. Auf der Lage 1 resultiert eine samtartige Beflockung 8.With a squeegee 2, the layer 1 is provided over the entire surface by brushing with an adhesive 3 and thus coated under a fiber application device 4 moves through. With the application device 4 short, negatively charged fibers 5 are uniformly applied to the lying at a positive potential layer 1. Due to the electrostatic charge, the fibers 5 are aligned parallel to one another perpendicular to the layer 1. With the setting or hardening of the adhesive of the adhesive application 3, the fibers 5 are fixed. Excess, not fixed fibers 7 are finally removed by suction with a suction device 6. On the layer 1 results in a velvety flock 8.

Fig. 2 zeigt eine Lage 1 mit einer Beflockung 8 als oberste Lage eines Pakets aus insgesamt 7 noch nicht miteinander verbundenen Lagen, wobei die Beflockung 8 aussenseitig ist. Bei den insgesamt mit 9 bezeichneten Inneren Lagen handelt es sich z.B. um dünne Holzfumiere mit einer Dicke von z.B. 1.2 mm. Die unterste Lage 10 könnte wie die oberste aus einem Hochdrucklaminat bestehen, wobei dieses aussenseitig jedoch anstatt mit einer Beflockung z.B. mit einer bedruckten oder gefärbten Dekorschicht 11 versehen ist. Eine Beflockung wäre hier jedoch ebenfalls möglich. Fig. 2 shows a layer 1 with a flocking 8 as the top layer of a package from a total of 7 not yet interconnected layers, the flocking 8 is on the outside. The inner layers, designated in total by 9, are, for example, thin wooden furs with a thickness of, for example, 1.2 mm. The bottommost layer 10 could, like the uppermost layer, consist of a high-pressure laminate, but this is provided on the outside instead of with a flocking, for example with a printed or colored decorative layer 11. However, flocking would also be possible here.

Aus den mehreren Lagen von Fig. 2 kann z.B. durch Verleimen unter Anwendung von Druck und Wärme in einer Formpresse 12 eine Sitzschale 14 z.B. für einen Stuhl hergestellt werden. Fig. 3 zeigt schematisch eine solche Presse 12 im noch geöffneten Zustand, in welche ein Paket 13 aus mehreren Lagen gemäss Fig. 2 eingelegt ist. Der zum Verleimen zwischen den Lagen erforderliche Leim ist nicht dargestellt. Die dünnen und dadurch flexiblen Lagen passen sich beim Einlegen in die Presse im wesentlichen bereits an ihre gewünschte Endform an. Die Presse 12 ist bevorzugt eine Hochfrequenzpresse und der Leim ein Holzleim auf Wasserbasis.From the several layers of Fig. 2 For example, by gluing using pressure and heat in a molding press 12, a seat shell 14 can be made, for example, for a chair. Fig. 3 schematically shows such a press 12 in the still open state, in which a package 13 from several layers according to Fig. 2 is inserted. The glue required for bonding between the layers is not shown. The thin and thus flexible layers adapt when inserted into the press essentially already to their desired final shape. The press 12 is preferably a high-frequency press and the glue is a water-based wood glue.

Fig. 4 zeigt unter a) eine fertige Sitzschale 14 mit Sitzfläche 15 und Rückenlehne 16, wie sie sich durch das Verleimen des Paketes 13 in der Formpresse 12 von Fig. 3 ergibt. Die Sitzschale 14 ist einseitig vollflächig, auf der Oberseite der Sitzfläche 15 und der Vorderseite der Rückenlehne 16, mit einer Beflockung 8 versehen. Die vor dem Verleimen auf der obersten Lage1 aufgebrachte Beflockung 8 wurde durch den Pressvorgang in der Presse 12 nicht beeinträchtigt. Fig. 4 shows under a) a finished seat 14 with seat 15 and backrest 16, as shown by the gluing of the package 13 in the molding press 12 of Fig. 3 results. The seat shell 14 is on one side over the entire surface, on the top of the seat 15 and the front of the backrest 16, provided with a flock 8. The flock 8 applied prior to gluing on the uppermost layer 1 was not affected by the pressing process in the press 12.

Eine vollflächige Beflockung auf Sitzfläche 1 5 und Rückenlehne 16 ergibt sich rationell mit dem in Fig. 1 dargestellten Auftragsverfahren für den Klebstoffauftrag 3 (wobei sich damit auch ein Streifenmuster erzeugen liesse). Für Sitzschalen von Stühlen genügt es gegebenenfalls jedoch, wenn lediglich ein Teil von ihnen wie z.B. nur die Sitzfläche 15 mit einer Beflockung versehen ist. Fig. 4 zeigt unter b) eine entsprechende Ausführungsform. Unter c) und d) zeigt Fig. 4 zwei weitere Beispiele, bei denen auf einer Teilfläche wie der Sitzfläche 15 ein lediglich teilflächiges Beflockungsmuster aufgebracht ist, nämlich in Form von mehreren Streifen in Fig. 4 c) und in Form eines Punktmusters in Fig. 4 d). Für diese Ausführungsformen muss zur Applikation des Klebstoffauftrags eine andere Auftragstechnik wie z.B. die Siebdrucktechnik verwendet werden, in weicher bliebige Muster herstellbar sind.A full-surface flocking on seat 1 5 and backrest 16 results rationally with the in Fig. 1 illustrated application method for the adhesive application 3 (which could also produce a striped pattern). For seats of chairs, it may be sufficient, however, if only a part of them, such as only the seat 15 is provided with a flocking. Fig. 4 shows under b) a corresponding Embodiment. In c) and d) shows Fig. 4 two further examples in which a partial area flocking pattern is applied on a partial surface such as the seat surface 15, namely in the form of several strips in Fig. 4c) and in the form of a dot pattern in Fig. 4 d) , For these embodiments, for the application of the adhesive application, a different application technique such as the screen printing technique must be used in softer remaining patterns can be produced.

Bei allen Ausführungsformen kann die Beflockung farblich gegenüber nicht beflockten Flächen kontrastieren.In all embodiments, the flocking may contrast in color to non-flocked surfaces.

BEZEICHNUNGSLISTENAME LIST

11
Lage eines dünnen HochdrucklaminatsLocation of a thin high pressure laminate
22
Rakeldoctor
33
Klebstoffauftragadhesive application
44
Faser-ApplikationsvorrichtungFiber applicator
55
Fasernfibers
66
Saugvorrichtungsuction device
77
nicht fixierte Fasernunfixed fibers
88th
Beflockungflocking
99
innere Lagen (Holzfuniere)inner layers (Holzfuniere)
1010
unterste Lagelowest location
1111
Dekorschichtdecorative layer
1212
Formpressemolding press
1313
Paketpackage
1414
Sitzschaleseat
1515
Sitzflächeseat
1616
Rückenlehnebackrest

Claims (11)

  1. Method for manufacturing curved, multi-layer seat shells (14), in particular for chairs, in which the multiple layers (1, 9, 10) of the seat shell are bonded together under application of pressure and heat, characterised in that pressure of 1 to 3 N/mm2 is applied in order to bond the layers, and in that at least one (1) of the two outer layers (1, 10) of the seat shell (14) is at least partially provided with flocking (8) before bonding with the other layers (9) while still in the flat or one-dimensionally curved state.
  2. Method according to claim 1, characterised in that the layer (1) to be flocked is provided with an adhesive coating (3) on the side to be flocked, and in that fibres (5) of the flocking (8) are subsequently applied to this adhesive coating (3) by means of electrostatic forces.
  3. Method according to claim 2, characterised in that the fibres (5) used are fibres, in particular polyamide fibres, with a length of between 0.5 and 4 mm, preferably 1 mm, and with a strength of 1 to 20 dtex, preferably 3.3 dtex.
  4. Method according to one of claims 2 or 3, characterised in that the adhesive coating (3) is applied partially, and preferably in surface patterns using the screen printing method.
  5. Method according to one of claims 2 to 4, characterised in that a heat-resistant adhesive that is not impaired by the heat applied whilst bonding the surfaces and that is particularly a two-component adhesive with a heat resistance of greater than 100°C is used for the adhesive coating (3).
  6. Method according to one of claims 1 to 5, characterised in that a high-pressure laminate is used for the surface(s) to be flocked (1).
  7. Method according to claim 6, characterised in that the high-pressure laminate is soaked with melamine resin.
  8. Method according to one of claims 1 to 7, characterised in that wood veneer is used for at least one inner layer (9) and a wood glue is used for bonding the layers.
  9. Method according to one of claims 1 to 8, characterised in that pressure of 2 N/mm2 is applied for bonding the layers.
  10. Method according to one of claims 1 to 9, characterised in that a temperature in the range of 60 to 100°C is applied for bonding the layers.
  11. Method according to one of claims 1 to 10, characterised in that a high-frequency press is used for bonding the layers.
EP08000422A 2007-01-12 2008-01-10 Method for manufacturing seat shells Not-in-force EP1944141B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007002623A DE102007002623A1 (en) 2007-01-12 2007-01-12 Method for producing seat shells

Publications (3)

Publication Number Publication Date
EP1944141A2 EP1944141A2 (en) 2008-07-16
EP1944141A3 EP1944141A3 (en) 2008-07-23
EP1944141B1 true EP1944141B1 (en) 2012-01-04

Family

ID=39295928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08000422A Not-in-force EP1944141B1 (en) 2007-01-12 2008-01-10 Method for manufacturing seat shells

Country Status (3)

Country Link
EP (1) EP1944141B1 (en)
AT (1) ATE539863T1 (en)
DE (1) DE102007002623A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20110055A1 (en) * 2011-04-11 2012-10-12 Vernifer Mav S R L NOBILIZATION PROCEDURE OF A SEATING ELEMENT OR PARTS OF IT AND ITS PART OF SESSION OR PARTS OF IT
CN103692506B (en) * 2013-12-24 2015-06-10 南京工业大学 Laminated wood member pressurizing preparation process based on wood air-drying density parameters
CN104526823A (en) * 2014-12-05 2015-04-22 柳州柏豪家具有限公司 Positioning precision compensating process of single board bent wooden furniture
FR3049208B1 (en) * 2016-03-25 2018-04-06 Jmvl Developpement METHOD FOR PRINTING AND SHAPING A WOODEN FURNITURE
CN106378849B (en) * 2016-09-09 2019-06-21 南京工业大学 Method for forming arc-shaped laminated wood member based on wood plasticity

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB895167A (en) * 1959-12-24 1962-05-02 Austin Motor Co Ltd Improvements in or relating to seats
DE1854546U (en) * 1961-10-05 1962-07-05 Fraenkische Holzwarenfabrik Os OFFICE CHAIR OR SIMILAR SEATING.
DE1454988A1 (en) * 1965-05-03 1969-05-08 Basf Ag Process for the production of molded articles made of thermoplastics reinforced with fibrous substances
DE7907295U1 (en) * 1979-03-15 1984-07-26 Alkor GmbH Kunststoffverkauf, 8000 München CARRIER PLATE WITH A DECORATIVE LAYER THEREOF
US7759267B2 (en) * 2006-04-05 2010-07-20 Azdel, Inc. Lightweight composite thermoplastic sheets including reinforcing skins

Also Published As

Publication number Publication date
EP1944141A3 (en) 2008-07-23
EP1944141A2 (en) 2008-07-16
ATE539863T1 (en) 2012-01-15
DE102007002623A1 (en) 2008-07-17

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