EP3927540A2 - Coussin de presse pour l'utilisation dans une presse chauffante hydraulique à un ou plusieurs étages ainsi qu'unité pour tôle de presse à coussin de presse et unité de plaques chauffantes pour tôle de presse - Google Patents

Coussin de presse pour l'utilisation dans une presse chauffante hydraulique à un ou plusieurs étages ainsi qu'unité pour tôle de presse à coussin de presse et unité de plaques chauffantes pour tôle de presse

Info

Publication number
EP3927540A2
EP3927540A2 EP20706437.9A EP20706437A EP3927540A2 EP 3927540 A2 EP3927540 A2 EP 3927540A2 EP 20706437 A EP20706437 A EP 20706437A EP 3927540 A2 EP3927540 A2 EP 3927540A2
Authority
EP
European Patent Office
Prior art keywords
press
pad
spring elements
plate
threads
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.)
Granted
Application number
EP20706437.9A
Other languages
German (de)
English (en)
Other versions
EP3927540B1 (fr
Inventor
Rolf Espe
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.)
Hueck Rheinische GmbH
Original Assignee
Hueck Rheinische GmbH
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 Hueck Rheinische GmbH filed Critical Hueck Rheinische GmbH
Priority to EP22160709.6A priority Critical patent/EP4032694B1/fr
Publication of EP3927540A2 publication Critical patent/EP3927540A2/fr
Application granted granted Critical
Publication of EP3927540B1 publication Critical patent/EP3927540B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/061—Cushion plates
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/062—Press plates
    • B30B15/064—Press plates with heating or cooling means
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • 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
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B27N7/005—Coating boards, e.g. with a finishing or decorating layer
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/20—Metallic fibres

Definitions

  • Press pad for use in a hydraulic single or multi-daylight heating press as well as press pad press plate unit and press plate heating plate unit
  • the invention relates to a press pad for use in a hydraulic one-day or multi-day heating press.
  • the invention relates to a press cushion / press plate unit and a press cushion / heating plate unit.
  • Wood-based panels such as plywood, chipboard, MDF, HDF or multiplex panels, are usually coated with high-grade cellulose papers impregnated with aminoplast resin. These papers can be printed with different decors or be plain colored.
  • the aminoplast resins consist of precondensed
  • Wood-based panels are used in a hydraulic heating press, which can have one or, alternatively, several floors.
  • the precondensed aminoplast resins first become liquid under pressure and temperature, the viscosity of the liquid resins increasing again due to the further molecular crosslinking and finally a solid surface being formed.
  • metallic press plates with structured, matt or glossy surfaces are brought into contact with the decorative papers or the aminoplast resins.
  • the press plates are usually chrome-plated to protect the surface against abrasion and damage.
  • the chrome layer also has the function that after the coating process (lamination) a perfect separation from the resin layer can take place.
  • Metallic press plates can
  • the wood-based panels have different bulk densities depending on the area of application and therefore also require different pressures.
  • the press systems are therefore always equipped with corresponding press pads, in particular those in the form of pressure compensation fabrics or mats.
  • the press pads are fixed between the heating plates and the press plates. They must be heat stable, i.e. must not decompose even at temperatures between 200 ° C and 230 ° C, must have a good spring effect or restoring force and a high
  • Formaldehyde and water are released in vapor form. Since the resin is located between the metal press plate and the wood-based panel, the system is hermetically sealed and the corresponding vapors have to diffuse into the paper web and the panel surface in the short time that the press systems provide.
  • Fluorosilicone rubber or fluororubber can be used.
  • the press cushions according to the prior art are typically available as a fabric containing elastomer material Threads or as coated mats with an inner, mostly metallic, supporting fabric.
  • a press pad which has a fabric and contains a copolymer consisting of a silicone and a fluorosilicone rubber.
  • the copolymer is in the form of coated threads that are called warp or weft threads
  • EP 0 735 949 A1 describes a press pad which has a silicone elastomer in one thread system and metal threads in the other thread system. The the
  • Threads comprising silicone elastomer can be designed as sheath-core threads, with the thread core made of wire and the thread sheath, for example, from the
  • EP 1 300 235 A and DE 23 19 593 A each have a press cushion made of metal fabric, which is then essentially coated over the entire surface with a silicone rubber. According to the teaching of EP 1 300 235 A, the metal threads lying towards a surface of the press pad, in particular theirs
  • Loops or loops exposed by doctoring during the coating process, in order to achieve a metallic contact between the press pad and the heating plate or press plate. It can also increase the
  • the known press cushions often have the disadvantage of material fatigue, in particular with regard to their restoring force or spring action.
  • the known press cushions often have the disadvantage of material fatigue, in particular with regard to their restoring force or spring action.
  • Silicone elastomers but also alternatively used press cushions with threads made of aromatic polymers, in particular polyamides, show such aging processes at continuous temperatures above approx. 200 ° C to 230 ° C.
  • the press cushions must therefore be replaced relatively early, which results in downtimes of the press systems and causes increased environmental pollution, especially since the press cushions made from the known materials or material mixtures are very difficult to recycle are.
  • press cushions are required which have a high recovery value even over a long period of use and a very high heat transfer. So far, when coating HDF boards for the flooring area (“laminate"), it has not been possible to change the board format with the known press cushions, as the cushions in the selected board format are heavily compressed and a later change to a larger format leaves marks on the pressed material.
  • press cushions according to the invention can also be used in so-called high-pressure press systems in which, for example, so-called high-pressure laminates e.g. in the form of base materials for printed circuit boards by pressing under heat.
  • a press pad for such an application that consists of a
  • High-temperature-resistant plastic fleece and a PTFE film bonded to it is known from DE 200 11 432 U. Due to the long cycle times in such pressing processes, metals are not required for this high-pressure cushion.
  • the invention is based on the object of providing a press pad which is characterized by a very high elastic resilience, which is maintained fatigue-free over the longest possible period, and a high thermal conductivity.
  • this object is achieved by a multiplicity of metallic spring elements which are connected to the support structure and are arranged distributed therein or on it.
  • Metallic spring elements have two advantages over elastomer materials or aromatic polymer materials: On the one hand, due to the metal material, they can have a very high modulus of elasticity, i.e. have great spring stiffness. This means that the restoring forces even with comparatively small deflections, i.e.
  • the modulus of elasticity with simultaneous high elongation at break are e.g. Steel, especially spring steel.
  • other metal materials such as
  • Copper alloys e.g. beryllium copper
  • metallic springs retain their resetting properties over very long periods of time, so that the press pads according to the invention have a correspondingly long service life.
  • metallic spring elements have a very good thermal conductivity, so that the heat transfer through the press cushion according to the invention is positively influenced, in particular in comparison with press cushions, which have a large proportion of a
  • the invention thus allows for the first time the use of a press cushion component which is equally advantageous both in terms of its thermal conductivity properties and in terms of its spring properties (resilience).
  • a press cushion component which is equally advantageous both in terms of its thermal conductivity properties and in terms of its spring properties (resilience).
  • different components were always used to optimize both properties (thermal conductivity and resilience), e.g. Elastomeric materials for a
  • the support structure can e.g. be formed by a metallic plate, preferably a press plate or a heating plate of the single or multi-level heating press.
  • a connection of the spring elements with a press plate or a heating plate a unit of press plate and spring elements or heating plate and spring elements is created in each case.
  • the spring elements are preferably glued and / or soldered and / or welded and / or positively connected to the respective plate, for example by inserting spring sections into corresponding recesses or openings in the plate.
  • one in the form of a flat textile structure can also be used according to the invention.
  • the textile in the form of a plate, one in the form of a flat textile structure can also be used according to the invention.
  • the textile can also be used according to the invention.
  • the textile in the form of a plate, one in the form of a flat textile structure can also be used according to the invention.
  • the textile in the form of a plate, one in the form of a flat textile structure can also be used according to the invention.
  • the textile in the form of a flat textile structure
  • Flat structures can be designed as knitted or knitted fabric or nonwoven fabric or woven fabric, at least some of the threads that form the textile flat structure being made of metal or containing metal, the metal being in particular brass, copper,
  • a combination of a metallic plate and a textile fabric can also be used to form the supporting structure.
  • the spring elements are preferably connected to the flat textile structure and / or the metallic plate.
  • a suitable connection between the textile fabric and the metallic plate is required, for example in the form of gluing or welding or soldering or a form-fitting connection between the threads of the textile fabric and the plate, e.g. guiding threads of the textile fabric through openings or recesses in the metallic plate.
  • Disk springs or coil springs or leaf springs or wave springs can preferably be used as metallic spring elements.
  • the spring elements can have openings through which threads of the textile fabric, in particular the aforementioned warp and weft threads, are passed.
  • a particularly preferred embodiment is formed by a press pad, in which the spring elements each have four openings, two of which have a warp thread and a weft thread is guided through the other two.
  • the crossing points of the respective threads can be designed particularly advantageously in this way.
  • the spring elements should be equidistant from one another, in particular within themselves
  • the spring elements can be partially embedded in an elastomer material, preferably in a silicone elastomer or a fluorosilicone elastomer or a blend polymer or copolymer of the two aforementioned elastomers.
  • elastomer material preferably in a silicone elastomer or a fluorosilicone elastomer or a blend polymer or copolymer of the two aforementioned elastomers.
  • sections or parts of the spring elements on both opposite sides of the press cushion each form a part of the surface of the
  • Elastomer material it can be useful to add particles to the elastomer material to increase the thermal conductivity of the press pad. These are in particular particles made of a metal or a mineral, these particles preferably being designed as nanoparticles.
  • Figure 1 is a schematic view of a press pad according to the invention
  • FIG. 2 shows a vertical section through a spring element from FIG. 1,
  • FIG. 3 shows a schematic view of a further press cushion according to the invention
  • FIG. 4 shows a vertical section through the press pad from FIG. 3,
  • FIG. 5 shows a vertical section through a single-daylight heating press according to the prior art
  • FIG. 6 shows a vertical section through a press pad heating plate unit according to the invention.
  • FIG. 7 shows a vertical section through a press cushion press plate unit according to the invention.
  • FIG. 1 An exemplary embodiment, which is shown in FIG. 1, comprises a press cushion T according to the invention for use in a hydraulic one-day or multiple-day heating press.
  • the press cushion 1 is arranged between a heating plate and a press plate of a single or multi-level heating press in order to
  • the press cushion 1 comprises a flat support structure 2 and a plurality of spring elements 3.
  • the flat support structure 2 is designed in the form of a fabric which comprises two thread systems 4, 5, namely warp threads 6 and weft threads 7.
  • the warp threads 6 as well as the weft threads 7 are designed in the form of wire braids made of brass and are interwoven to form a linen weave. The warp threads 6 accordingly run alternately above and below the weft threads 7 and vice versa.
  • the spring elements 3 of the press pad 1 are designed in the form of metallic disc springs 8.
  • the disc spring 8 When used in a single or multi-level heating press, the disc spring 8 is in an undeformed state only with a circular, upper edge 9 with a heating plate of a single or multi-level heating press and with a likewise circular, lower edge 10 with a press plate an one or
  • the disc springs 8 have beveled (conical) side sections 15, which reduce a diameter of the first contact line 11 compared to a
  • a section through a plate spring 8 is shown in FIG. 2 and illustrates a truncated cone shape.
  • the spring element 3 is deformed in such a way that a flat, upper contact surface 13 is formed.
  • a flat, lower contact surface 14 is formed.
  • one of the contact surfaces 13, 14 is in contact with the heating plate when used in a single or multi-opening heating press, while the other contact surface 13, 14 is in contact with the press plate.
  • Disk spring 8 thus essentially assumes the shape of a hollow cylinder during the pressing process.
  • the disc springs 8 are provided with four openings 17 which are arranged in a circle at an angle of 90 ° to one another and which close
  • Simplification of the production can also be open to the circular outer edge of the disc spring 8 in order not to have to “thread through” the weft threads 7 or warp threads 6 with a thread end but to be able to “thread” them laterally. Divided by two
  • Opposite openings 17 of the spring elements 3 are each passed a thread 6, 7 of a thread system 4, 5, while the remaining two openings 17 are provided for receiving a thread 6, 7 of the corresponding other thread system 4, 5.
  • a point of intersection 18 of a warp thread 6 and a weft thread 7 essentially corresponds to a central axis 19 of the spring element 3.
  • the disc springs 8 are arranged equidistantly in the press pad 1 and form rows intersecting at an angle of 90 ° in the press pad 1. The press pad 1 can therefore be easily rolled up and transported.
  • an upper contact surface of the press pad 1 is formed by the entirety of the upper contact surfaces 9 of the individual disc springs 8, while a lower contact surface of the press pad T is formed by the entirety of the lower contact surfaces 10 of the individual disc springs 8 is determined.
  • the press cushion T also comprises a flat support structure 2 in the form of a fabric and a large number of metallic spring elements 3.
  • the press cushion T according to FIG. 2 has a coating 25 on both sides made of a heat-stable elastomer material.
  • the press cushion T shown in FIG. 1 is therefore essentially embedded in the elastomer material.
  • the coating 25 has been removed in the area of each spring element 3, as can be seen in FIG. A lower surface and a lower surface 26 of the press cushion T are therefore partially formed by the spring elements 3.
  • a one-daylight heating press 27 according to the prior art is shown in FIG.
  • the single-level heating press 27 comprises two heating plates 28 and two press plates 29.
  • a press cushion T, 1 according to the invention is arranged between a heating plate 28 and a press plate 29 of the single-level heating press 27.
  • a wood-based panel 30 to be coated is inserted between the two press plates 29 and is covered with a decorative paper not shown in the figure.
  • the decorative paper is connected to the wood-based panel 30 by means of the heat emanating from the single-deck heating press 27 and the pressure exerted on the wood-based panel 30.
  • FIG. 6 An exemplary embodiment of a press cushion / heating plate unit 31 according to the invention, which is shown in FIG. 6, comprises a press cushion 1, T according to the invention and a heating plate 28 of a single or multi-stage heating press.
  • the press cushion 1, T is glued to the heating plate 28 in such a way that a single component is formed.
  • FIG. 1 An exemplary embodiment of a press pad / press plate unit 32 according to the invention is shown in FIG.
  • the press cushion T, 1 according to the invention is not connected, for example glued, to a heating plate 28, but to a press plate 29 of a single or multi-level heating press, and thus also forms a single component.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention concerne un coussin de presse (1) pour l'utilisation dans une presse chauffante hydraulique à un ou plusieurs étages, comprenant une structure porteuse (2) plane ainsi qu'une pluralité d'éléments de ressort (3) métalliques, qui sont connectés à la structure porteuse (2) et sont repartis dans ou sur celle-ci. L'invention concerne en plus une unité pour tôle de presse à coussin de presse ou une unité de plaques chauffantes à coussin de presse.
EP20706437.9A 2019-02-20 2020-02-18 Coussin de presse pour l'utilisation dans une presse chauffante hydraulique à un ou plusieurs étages ainsi qu'unité coussin de presse/plaque de pressage et unité coussin de presse/plaque chauffante Active EP3927540B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22160709.6A EP4032694B1 (fr) 2019-02-20 2020-02-18 Ensemble d'une unité coussin de presse-plaque de pression et d'une plaque chauffante ou ensemble d'une unité coussin de presse-plaque chauffante et d'une plaque de pression, à utiliser dans une presse chauffante hydraulique à un ou plusieurs étages

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202019000828.4U DE202019000828U1 (de) 2019-02-20 2019-02-20 Presspolster mit hoher Federwirkung auf metallischer Basis für die Beschichtung von Holzwerkstoffplatten und Herstellung von Kunststoffplatten in hydraulischen Ein- und Mehretagenheizpressen.
PCT/EP2020/054156 WO2020169556A2 (fr) 2019-02-20 2020-02-18 Coussin de presse pour l'utilisation dans une presse chauffante hydraulique à un ou plusieurs étages ainsi qu'unité pour tôle de presse à coussin de presse et unité de plaques chauffantes pour tôle de presse

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP22160709.6A Division-Into EP4032694B1 (fr) 2019-02-20 2020-02-18 Ensemble d'une unité coussin de presse-plaque de pression et d'une plaque chauffante ou ensemble d'une unité coussin de presse-plaque chauffante et d'une plaque de pression, à utiliser dans une presse chauffante hydraulique à un ou plusieurs étages
EP22160709.6A Division EP4032694B1 (fr) 2019-02-20 2020-02-18 Ensemble d'une unité coussin de presse-plaque de pression et d'une plaque chauffante ou ensemble d'une unité coussin de presse-plaque chauffante et d'une plaque de pression, à utiliser dans une presse chauffante hydraulique à un ou plusieurs étages

Publications (2)

Publication Number Publication Date
EP3927540A2 true EP3927540A2 (fr) 2021-12-29
EP3927540B1 EP3927540B1 (fr) 2023-07-19

Family

ID=69645953

Family Applications (2)

Application Number Title Priority Date Filing Date
EP22160709.6A Active EP4032694B1 (fr) 2019-02-20 2020-02-18 Ensemble d'une unité coussin de presse-plaque de pression et d'une plaque chauffante ou ensemble d'une unité coussin de presse-plaque chauffante et d'une plaque de pression, à utiliser dans une presse chauffante hydraulique à un ou plusieurs étages
EP20706437.9A Active EP3927540B1 (fr) 2019-02-20 2020-02-18 Coussin de presse pour l'utilisation dans une presse chauffante hydraulique à un ou plusieurs étages ainsi qu'unité coussin de presse/plaque de pressage et unité coussin de presse/plaque chauffante

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP22160709.6A Active EP4032694B1 (fr) 2019-02-20 2020-02-18 Ensemble d'une unité coussin de presse-plaque de pression et d'une plaque chauffante ou ensemble d'une unité coussin de presse-plaque chauffante et d'une plaque de pression, à utiliser dans une presse chauffante hydraulique à un ou plusieurs étages

Country Status (8)

Country Link
US (1) US12076955B2 (fr)
EP (2) EP4032694B1 (fr)
JP (1) JP7337942B2 (fr)
CN (1) CN113439022B (fr)
BR (1) BR112021015190A2 (fr)
DE (1) DE202019000828U1 (fr)
ES (1) ES2953330T3 (fr)
WO (1) WO2020169556A2 (fr)

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Also Published As

Publication number Publication date
US12076955B2 (en) 2024-09-03
EP3927540B1 (fr) 2023-07-19
CN113439022B (zh) 2023-11-07
WO2020169556A3 (fr) 2020-10-15
EP4032694B1 (fr) 2025-02-12
WO2020169556A2 (fr) 2020-08-27
JP2022521202A (ja) 2022-04-06
EP4032694A1 (fr) 2022-07-27
DE202019000828U1 (de) 2020-02-24
US20220001636A1 (en) 2022-01-06
ES2953330T3 (es) 2023-11-10
JP7337942B2 (ja) 2023-09-04
BR112021015190A2 (pt) 2021-09-28
CN113439022A (zh) 2021-09-24

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