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
  • B32B38/00—Ancillary operations in connection with laminating processes
  • B32B38/0036—Heat treatment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27D—WORKING VENEER OR PLYWOOD
  • B27D3/00—Veneer presses; Press plates; Plywood presses
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
  • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
  • B27K3/02—Processes; Apparatus
  • B27K3/15—Impregnating involving polymerisation including use of polymer-containing impregnating agents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
  • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
  • B27M3/04—Manufacture or reconditioning of specific semi-finished or finished articles of flooring elements, e.g. parqueting blocks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
  • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
  • B27N3/08—Moulding or pressing
  • B27N3/20—Moulding or pressing characterised by using platen-presses
  • B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
• • 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
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
  • B32B37/0015—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid warp or curl
• • 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
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
• • 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
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F15/00—Flooring
  • E04F15/16—Flooring, e.g. parquet on flexible web, laid as flexible webs; Webs specially adapted for use as flooring; Parquet on flexible web
• • 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
  • B32B2607/00—Walls, panels
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/19—Sheets or webs edge spliced or joined
  • Y10T428/192—Sheets or webs coplanar
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
  • Y10T428/24281—Struck out portion type
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
  • Y10T428/2457—Parallel ribs and/or grooves
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24777—Edge feature

Definitions

• the invention relates to a device and a method for pressing a layer system for the production of panels.
• the invention further relates to panels produced according to the method.
• a panel for example known from the document EP 090 6994 AI, is an elongated, thin plate which can be connected laterally to other panels, for example via grooves and tongues. Panels connected in this way are used in particular as floor coverings.
• panels are manufactured by a short-cycle pressing process as follows.
• a carrier plate is placed on a film-like layer impregnated with resin, which is called “counter-tension paper”.
• a further layer impregnated with resin, film-like and provided with a decor is placed thereon.
• Such a layer is known under the name “decorative paper”
• a next layer of corundum and resin-containing film is applied to the decorative layer.
• This layer is known under the name "overlay”.
• the desired hardness of the surface of a panel is achieved by the overlay.
• the aforementioned layer system is gripped together at the edge with gripping means and transported into a press.
• the press essentially consists of two arranged parallel to one another Plates heated to approximately 200 ° C.
• the layer system is placed on the lower of the two Plates put on.
• the upper plate is then lowered so that the layer system is pressed together.
• the resins melt due to the heat supplied through the plates.
• the top plate is raised.
• Grippers with suction cups are brought over the compressed layer system and lowered.
• the suction cups are placed on the layer system and suck themselves firmly. With the help of the suction cups that are sucked in, the layer system is raised and transported out of the press.
• panels are cut using appropriate devices, which are usually approximately 1200 to 1300 mm long, five to twelve millimeters thick and approximately 200 mm wide.
• the panels generally have grooves and tongues as a result of a milling process. Panels are connected using tongue and groove. They then form floor coverings or wall cladding.
• the connected panels are assembled, for example, to form a floor covering, which is known under the name laminate floor.
• connection points or joints between the panels have a relatively large number of connection points or joints between the panels.
• these connection points are undesirable for aesthetic reasons.
• gaps or cracks remain or develop over time, through which moisture and contaminants can penetrate. Moisture damages the panels. Contamination disturbs the appearance as well as the hygiene.
• connection points could be significantly reduced if the panels had a larger width significantly above the 200 mm. Due to the manufacturing process, however, panels that are of the required quality cannot currently be manufactured.
• the invention has for its object to avoid the number of joints in a floor composed of panels.
• the object is achieved with the aid of a device with the features of the first claim.
• a method for solving the problem comprises the features of the subclaim.
• the product manufactured according to the method comprises the features of the claim directed to the panel.
• the device comprises gripping means for gripping a layer system of the type mentioned in the introduction and for bringing two plates of a press.
• the presses are brought to operating temperature via heating medium. Movement means are also provided in order to move both plates towards the layer system and to compress it at the same time.
• the position of the pressing plates relative to the position of the gripping means is selected so that the gripping means cannot get between the pressing plates.
• the press plates are removed from the layer system at the same time.
• the layer system that is now pressed is then processed in a known manner.
• the heat is supplied at the same time. There is no need to melt or solidify the resins at different times. The corresponding deformations are thus avoided. It is thus possible to manufacture panels of very good quality, which are considerably wider than conventional panels.
• the dimensions of the panels which can now be manufactured with the required quality, are over 300 mm wide. Dimensions above 600 mm still have the desired quality. This However, widths can no longer be handled with sufficient ease with the usual lengths of up to 2000 mm. Dimensions above 600 mm are therefore no longer useful if the average consumer is the target group. Dimensions from 380 to are appropriate
• the problem of the curvatures described at the beginning relates only to thin panels. These include panels that are up to 12 mm thick. The thicker the panels, the less the surfaces bend in a production where the heat input from one side starts a few seconds earlier than the supply from the other side. Panels that are thinner than 5 mm are too fragile. It is therefore expedient to maintain a thickness of at least 5 mm as the lower limit.
• the temperature with which the upper side of the layer system is applied during the pressing can differ from the temperature which is applied from the underside. To achieve good results, this is always the case when different resins with different ones
• the device according to the invention has the features described in terms of construction. It is essential that the usual two-sided heat supply is not carried out for a few seconds with a time lag. This applies to both the beginning and the end of the feed. This prevents the resins from melting or solidifying at different times. In many cases, it is also necessary to provide different temperatures on the top and bottom when pressing a panel. Production-related curvatures are significantly reduced.
• the temperatures are usually between 150 and 220 ° C during the combined supply of heat and pressure.
• the temperature prevailing on the top can differ from the temperature prevailing on the bottom by, for example, 20 ° C.
• the panels with a width of at least 300 mm - in particular at least 380 mm - have double groove springs with which two panels are or are laterally connected to one another.
• double groove springs according to the claims - that is, the edges of a panel each have a groove and a tongue arranged one above the other - are known from the document EP 090 699 4, but not in combination with panels that are more than 300 mm wide exhibit.
• panels produced in accordance with the method comprise further locking means which lock the panels together without glue.
• additional locking means for glueless connection are for example from the
• EP 0 877 130 A2 EP 0855482 B1, US 5,295,341 or US 4,426,820 are known.
• practice has shown that with previous manufacturing techniques it is hardly possible to produce precisely enough, for example, to be able to avoid a delta game in the sense of the publication EP 0855482 B1.
• Only the curvature-free production according to the invention enables such an exact production that two panels can be connected to one another reliably, free of play and exactly.
• FIG. 1 outlines a device for pressing a layer system for the production of panels for a floor.
• a layer system 1 comprises a carrier plate and foils, paper webs or the like arranged above and below and which are impregnated with resins.
• the layer system - as indicated by arrow 3 - is brought between two plates 4 of a pressing device.
• the gripping means 2 are located on the side next to the pressing plates 4.
• the gripping means are thus arranged in such a way that they cannot get between the pressing plates 4 during pressing.
• the plates 4 are brought to a temperature close to 200 ° C. by heating elements, not shown. The exact temperature is adapted to the melting point of the resin to be melted.
• the plates 4 are moved in the direction of the arrows 5, that is to say in the direction of the layer system 1.
• the plates 4 move in such a way that they simultaneously strike the layer system 1 and compress it.
• the layer system is subjected to the same temperature and pressure from above and from below (on both sides).
• the resins on both sides of the carrier plates melt at the same time and are not delayed by a few seconds as in the prior art mentioned at the beginning.
• the plates 4 are removed from the layer system at the same time, that is to say opposite to the direction of the arrows 5. As a result, the supply of the temperature is stopped at the same time. At the same time, the resins, i.e. the adhesives, solidify.
• the method illustrated in FIG. 1 or by means of the pressing device creates a particularly flat pressed layer system which is cut in a known manner into panels with a width of at least 300 mm and a length of at least 800 mm. Finally, grooves and tongues or similar elements to connect panels to a floor covering are milled.
• FIG. 2 shows two panels 6 which are laterally connected to one another and between which a joint 7 is located.
• this connection is effected via grooves and tongues, not shown, which have been suitably milled on the side of the panels.
• Double groove springs are advantageously provided on the edges. A tongue of a panel is pushed into a corresponding groove of an adjacent panel together with glue. After the glue has dried, two panels are joined together.
• At least one groove on the underside of one panel and at least one nose on another panel are provided as additional locking means by means of which two panels can be connected without glue.
• the nose is provided so that it snaps into the groove on the underside when two panels are assembled.

Landscapes

• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Forests & Forestry (AREA)
• Manufacturing & Machinery (AREA)
• Physics & Mathematics (AREA)
• Architecture (AREA)
• Fluid Mechanics (AREA)
• Quality & Reliability (AREA)
• Thermal Sciences (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Floor Finish (AREA)
• Veneer Processing And Manufacture Of Plywood (AREA)
• Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Applications Claiming Priority (3)

Publications (1)

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Citations (1)

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• 1999
  • 1999-09-22 DE DE19945279A patent/DE19945279C1/de not_active Expired - Fee Related
  • 1999-10-21 IT IT1999MI002212A patent/IT1314057B1/it active
  • 1999-10-27 GB GB9925312A patent/GB2354482B/en not_active Expired - Lifetime
  • 1999-11-29 FR FR9914988A patent/FR2798615B1/fr not_active Expired - Fee Related
  • 1999-12-10 ES ES009902711A patent/ES2187226B1/es not_active Expired - Fee Related
  • 1999-12-13 PT PT102391A patent/PT102391B/pt not_active IP Right Cessation
• 2000
  • 2000-01-07 AT AT0000800U patent/AT4012U1/de not_active IP Right Cessation
  • 2000-01-12 AU AU25411/00A patent/AU2541100A/en not_active Withdrawn
  • 2000-08-04 CN CNB008016569A patent/CN1176790C/zh not_active Expired - Lifetime
  • 2000-08-04 CA CA002350494A patent/CA2350494A1/en not_active Abandoned
  • 2000-08-04 WO PCT/EP2000/007579 patent/WO2001021366A1/de active Application Filing
  • 2000-08-04 RU RU2001113718/12A patent/RU2246398C2/ru not_active IP Right Cessation
  • 2000-08-04 YU YU35801A patent/YU35801A/sh unknown
  • 2000-08-04 EP EP00956397A patent/EP1131192A1/de not_active Withdrawn
  • 2000-08-04 KR KR1020017006397A patent/KR100639426B1/ko not_active IP Right Cessation
  • 2000-08-04 HU HU0200920A patent/HUP0200920A2/hu unknown
  • 2000-08-04 PL PL347737A patent/PL199111B1/pl not_active IP Right Cessation
  • 2000-08-04 EE EEP200100265A patent/EE200100265A/xx unknown
  • 2000-08-04 CZ CZ20011772A patent/CZ20011772A3/cs unknown
  • 2000-08-04 JP JP2001524773A patent/JP2003509247A/ja not_active Withdrawn
  • 2000-08-04 AU AU68357/00A patent/AU6835700A/en not_active Abandoned
  • 2000-08-04 US US09/856,087 patent/US6761961B1/en not_active Expired - Lifetime
• 2001
  • 2001-05-21 NO NO20012487A patent/NO20012487D0/no unknown
  • 2001-12-31 HK HK01109244A patent/HK1038718A1/xx not_active IP Right Cessation
• 2002
  • 2002-09-27 US US10/256,711 patent/US20030064199A1/en not_active Abandoned

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