EP1779999B1 - Druckausgleichsgewebe für hydraulische Heizpressenanlagen - Google Patents

Druckausgleichsgewebe für hydraulische Heizpressenanlagen Download PDF

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Publication number
EP1779999B1
EP1779999B1 EP20060019667 EP06019667A EP1779999B1 EP 1779999 B1 EP1779999 B1 EP 1779999B1 EP 20060019667 EP20060019667 EP 20060019667 EP 06019667 A EP06019667 A EP 06019667A EP 1779999 B1 EP1779999 B1 EP 1779999B1
Authority
EP
European Patent Office
Prior art keywords
threads
fabric
elastomer
pressure equalization
metal
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.)
Revoked
Application number
EP20060019667
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1779999A1 (de
Inventor
Rolf Dr. 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.)
Rheinische Filztuchfabrik GmbH
Original Assignee
Rheinische Filztuchfabrik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35746104&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1779999(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Rheinische Filztuchfabrik GmbH filed Critical Rheinische Filztuchfabrik GmbH
Priority to PL06019667T priority Critical patent/PL1779999T3/pl
Publication of EP1779999A1 publication Critical patent/EP1779999A1/de
Application granted granted Critical
Publication of EP1779999B1 publication Critical patent/EP1779999B1/de
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • Y10T442/322—Warp differs from weft
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • Y10T442/322—Warp differs from weft
    • Y10T442/3228—Materials differ
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • Y10T442/3293—Warp and weft are identical and contain at least two chemically different strand materials

Definitions

  • the invention relates to a pressure compensating fabric, in particular press pad, suitable for use in hydraulic Walkerpressanlagen comprising metal filaments, both as warp and as weft threads of the press pad, and high temperature resistant elastomeric threads, the latter preferably with stabilizing core threads, wherein the elastomeric threads either as warp or as weft threads alternately are arranged with the metal filaments.
  • Press pads are used in various types of press systems, such as the so-called one-day short-cycle presses for the lamination of particleboard, MDF or HDF boards with thermoset resins such as melamine, melamine-urea mixed resins or phenolic resins, but also in multi-floor high-speed presses. and low pressure presses for the production of high pressure laminate, compact and plywood boards.
  • press pads can be used in all press systems.
  • Such press pads are usually constructed in the form of a fabric, wherein the materials are resistant to high temperatures, since the operating temperatures in the press systems are partly above 200 ° C. Furthermore, they should, if possible, have a large recovery property with an intermittent pressure load and have a fast thermal conductivity.
  • Thermoset resins are very sensitive to pressure tolerances when forming surfaces on the aforementioned plate materials. Thus surface defects can arise due to unequal pressure distribution.
  • Known manner prevail in the coating systems considerable thickness tolerances, which add up from the press system, press plates and the respective pressed material.
  • the press pads therefore have the task to compensate for these thickness tolerances and to transfer the pressing pressure uniformly and over the entire surface of the material to be pressed, at the same time a rapid and uniform heat transfer of the hotplate temperature of the press plant is aimed at the pressed material.
  • the flexible upholstery fabric consists of a yarn of aromatic polyamide, which may be mixed with other yarn materials.
  • the textile fabric contains metal filaments, wherein the proportion between 0 and 70 wt.% Is to adjust the required thermal conductivity accordingly.
  • EP 0 713 762 A2 is a press pad for high and low pressure presses made of different materials.
  • a likewise known from the prior art press pad is from the EP 0 735 949 B1 known, wherein the warp threads and / or weft threads have a silicone elastomer and in the fabric metal wire in the form of full filaments or with silicone sheath are included.
  • a press pad consisting of a fabric comprising a substantial proportion of a blend elastomer prepared by crosslinking a mixture of a silicone rubber and a fluororubber or of a silicone rubber and a fluorosilicone rubber.
  • the proportion of fluororubber or fluorosilicone rubber should be at least 4% by weight, preferably 10% by weight.
  • the warp and / or weft threads contain metal threads.
  • a press pad known which is used for the production of printed circuit boards.
  • the known pad may comprise a woven fabric, a paper, a film or a sheet-like structure, which is combined as a layer with at least one further layer of a fluoroelastomer.
  • the fluoroelastomer should have a fluororubber component of the polyol cure system, a curative, a cure accelerator, and an acid acceptor.
  • Another press pad goes out of the EP 1 300 235 B1 out.
  • This is a metal mesh, consisting of core threads with stainless steel sheath and twisted copper wires with aramid core, wherein the metal fabric with a Silicone rubber coating is provided. To ensure heat transfer, the copper threads protrude from the silicone rubber surface.
  • a press pad for use in laminating presses with a fabric which has two groups of parallel threads in each case, wherein the threads of the first and the second group intersect.
  • the threads of the first group are made of metal or have at least one metal portion
  • the threads of the second group are made of rubber-elastic material or have at least a portion thereof.
  • the thread density of the threads of the second group is so great that the threads of the first group pass through the latter only by compressing the threads of the second group.
  • the fact that the threads of the first group are forced to pass through very steeply between these threads due to the small distance between the threads of the second group, resulting in short distances between the two surfaces of the press pad, so that the heating of the pressed material is faster.
  • the types of sutures should have a core of metal threads in order to ensure the strength of the polymer threads in the longitudinal direction.
  • the melamine resins are first low-viscosity fusible and flowable and then crosslink to insoluble, infusible hard, abrasion-resistant and thermally resistant plastics. This is called a so-called polycondensation, whereby water and formaldehyde is formed.
  • the resulting in the condensation reaction water and formaldehyde can not be released in vapor form, since the pressing pressure prevailing in the press, is above the vapor pressure of the water and also presses the two gas products in the film layer or in the support plate.
  • the flow time and the melt viscosity of the resin are determined essentially by the degree of condensation, the ability to react and the temperature and must be adjusted so that the vapor bubbles can migrate before the resin melt solidifies and the surface is formed. If these vapor bubbles can not diffuse sufficiently into the carrier plate, cloudy to milky surfaces develop. This haze is caused by the different refractive indices of the predominant materials.
  • the existing temperatures are relatively constant, so that the resin flow can not be influenced by temperature change, which naturally does not want to change the predetermined pressing times. Although the heat flow in all press pads is different in speed but uniform, no positive influence on the resin viscosity or the resin flow can be achieved.
  • the invention has for its object to propose a press pad, which ensures a better diffusion of the vapor bubbles and thus a transparent and closed melamine resin surface is achieved. Especially the liquid resin phase should be extended.
  • the object is achieved in that the elastomer threads in the warp or in the weft of the pressure compensation fabric and the metal threads in the weft and in the chain of the press pad of the pressure compensation fabric are cranked, wherein the elastomeric threads have a larger diameter than the metal threads and wherein the metal threads also on their Wave crests have a distance from a plane formed by the peaks of the elastomeric threads, so that the thickness is determined in the uncompressed state of the press pad of the elastomeric threads.
  • Advantage of the press pad according to the invention is a controlled heat flow in the manner of a pressure-dependent heat flow.
  • the heat flow takes place during this time essentially only by the elastomeric threads, since the metal threads are not yet in contact with the heating plate and the press plate. Since the viscosity or the degree of crosslinking of the resin is temperature-dependent, the liquid resin phase is extended until the metal threads of the press pad come into contact with the heat-conveying hot plate and the press plate by the increasing pressing pressure.
  • the press pad according to the invention thus allows a time-delayed increase in the prevailing at the surface of the press pad temperature to provide more time for flow of the resin over an extension of the "low-temperature phase".
  • the press pad according to the invention has metal threads both as warp threads and as weft threads, whereby the press pad is very dimensionally stable.
  • the high-temperature resistant elastomer threads are arranged either as warp threads or as weft threads alternately with the metal threads.
  • Either an elastomer thread and a metal thread can be arranged alternately, or in each case one elastomer thread and two or three metal threads, or vice versa, wherein the invention should not be limited to the aforementioned variants.
  • the diameter of the elastomer threads is at least twice, preferably three times, the diameter of the metal threads.
  • the ratio of the diameters of the elastomeric filaments to that of the metal filaments increases, the length of the liquid resin phase increases, and thus the period during which the vapors can diffuse into the paper web during the pressing operation.
  • too large diameters of the elastomer threads counteract the need for short pressing times.
  • the elastomer threads are advantageous for the elastomer threads to consist of high temperature resistant elastomers such as silicone rubber, fluorosilicone rubber, fluororubber, or a copolymer of the aforementioned rubbers.
  • the stabilizing core threads can consist of single filaments, and it is again advantageous if they are high-temperature resistant core threads, such as polyaramids such as Kevlar or Nomex filaments.
  • the elastomeric threads are provided with metallic core threads either of monofilaments or of stranded metal threads such as copper strands, brass strands, (noble) steel strands, etc.
  • the elastomer threads in the elastomer sheath may contain thermally conductive substances, such as metal powder.
  • Elastomers according to DIN 7724 are polymeric materials which behave entropy-elastically (rubber-elastic) in the service temperature range. Elastomers, also referred to as rubber (excluding hard rubber) or vulcanizates in German usage, are formed by crosslinking of rubbers by crosslinking in the majority of cases or by cross-linking copolymerization of low molecular weight starting materials. Elastomers can not be significantly deformed by heat or moderate pressure. In general, their tensile set remains below 2%.
  • the method initially mentioned is achieved by a method for pressing a pressed material in a hydraulic Thompsonpressstrom with a hot plate, a pressure plate and a pressure equalization fabric arranged therebetween, in particular one of the above-described press pad, in which in a first step, a moderate pressure is built up, so in that the contact points of the press pad with the heating plate and the press plate are formed by elastomer threads of the pressure compensation fabric and in a second step an increase in pressure up to a total pressure, wherein the Elastormerfäden be compressed so that further contact points are formed by metal threads of the pressure compensation fabric.
  • FIG. 1 shows a metallic strand of individual stranded brass threads 2, this metal thread 1 is processed both as a warp and as a weft thread of a pressure compensation fabric 6.
  • an elastomer thread 3 is shown, which consists of a core thread 4 and an elastomer sheath 5, for example of a copolymer fluorosilicone / silicone rubber.
  • the core thread 4 consists of stranded copper threads.
  • the elastomer thread 3 is processed as a weft thread of the pressure compensation fabric 6.
  • FIG. 3 shown top view of the pressure compensation fabric 6 according to the invention are the upwardly cranked elastomeric threads 3 in the shot or the cranked metal threads 1 in the weft and in the chain of Presspolstergewebes to recognize.
  • the elastomer threads 3 have a significantly larger diameter than the metal threads 1, wherein the diameter of the elastomer threads 3 is advantageously at least twice as large as that of the metal threads. 1
  • FIG. 4 shows a section through the press pad according to the invention according to FIG. 3 , which is arranged in a press plant between a heating plate 7 and a press plate 8.
  • the contact points of the press pad are initially formed at moderate pressure build-up only by the elastomeric threads 3.
  • the metal filaments 1 all, even at their extreme points ("wave crests") at a distance from the plane formed by the extreme points ("peaks") of the elastomeric filaments 3, whereby the thermal conductivity is initially lower. Only with further pressure increase up to the total pressure additional contact points 9 are formed by the stranded brass threads 2, so that then a faster heat flow is produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Woven Fabrics (AREA)
  • Press Drives And Press Lines (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Laminated Bodies (AREA)
  • Reinforced Plastic Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Surface Heating Bodies (AREA)
EP20060019667 2005-10-28 2006-09-20 Druckausgleichsgewebe für hydraulische Heizpressenanlagen Revoked EP1779999B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06019667T PL1779999T3 (pl) 2005-10-28 2006-09-20 Tkanina do wyrównywania ciśnienia do hydraulicznych instalacji do prasowania na gorąco

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202005016935U DE202005016935U1 (de) 2005-10-28 2005-10-28 Druckausgleichsgewebe für hydraulische Heizpressenanlagen

Publications (2)

Publication Number Publication Date
EP1779999A1 EP1779999A1 (de) 2007-05-02
EP1779999B1 true EP1779999B1 (de) 2008-10-15

Family

ID=35746104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060019667 Revoked EP1779999B1 (de) 2005-10-28 2006-09-20 Druckausgleichsgewebe für hydraulische Heizpressenanlagen

Country Status (10)

Country Link
US (1) US20070099529A1 (pl)
EP (1) EP1779999B1 (pl)
CN (1) CN1966794B (pl)
AT (1) ATE411158T1 (pl)
DE (2) DE202005016935U1 (pl)
ES (1) ES2314800T3 (pl)
HK (1) HK1104326A1 (pl)
PL (1) PL1779999T3 (pl)
PT (1) PT1779999E (pl)
RU (1) RU2417893C2 (pl)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010001226U1 (de) 2010-01-20 2011-05-26 Helmbach GmbH & Co. KG, 52353 Presspolster
DE102010036539B4 (de) 2010-07-21 2013-04-11 Hueck Rheinische Gmbh Presspolster für eine hydraulische Presse
CN102126328A (zh) * 2011-01-16 2011-07-20 铜陵华源汽车内饰材料有限公司 一种热压机
CN102152371A (zh) * 2011-03-17 2011-08-17 薛志成 一种竹碎料板高效热压方法
DE102013100433A1 (de) * 2013-01-16 2014-07-31 Hueck Rheinische Gmbh Presspolster für eine Ein- oder Mehretagenheizpresse
CN104333839B (zh) * 2014-10-11 2018-03-23 黄清山 一种弹波或悬边的制造方法及弹波或悬边
DE202015006923U1 (de) * 2015-10-02 2015-10-16 Rolf Espe Presspolster für den Einsatz in hydraulischen Ein- oder Mehretagenheizpressen
DE202016000367U1 (de) * 2016-01-20 2016-02-05 Rolf Espe Presspolster für Ein- und Mehretagenpressen deren Polsterschicht aus Silikonelastomer im 3D-Druckverfahren aufgetragen wird.
DE102018133542A1 (de) * 2018-12-21 2020-06-25 Hueck Rheinische Gmbh Presspolster sowie Verfahren zu dessen Herstellung
DE102019107005A1 (de) * 2019-03-19 2020-09-24 Hueck Rheinische Gmbh Presspolster für den Einsatz in Ein- oder Mehretagenheizpressen
DE102019115974A1 (de) * 2019-06-12 2020-12-17 Hueck Rheinische Gmbh Verfahren zur Herstellung eines Presspolsters sowie Pressblechset

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2650642A1 (de) * 1976-11-05 1978-05-18 Ver Seidenwebereien Ag Luft- und hitzedurchlaessige druckausgleichsmatte
GB9421573D0 (en) * 1994-10-26 1994-12-14 Marathon Belting Ltd A press pad
DE9418984U1 (de) * 1994-11-25 1995-01-26 Rheinische Filztuchfabrik GmbH, 52222 Stolberg Preßpolster für Hoch- und Niederdruckpressen
DE29721495U1 (de) * 1997-12-05 1998-02-19 Thomas Josef Heimbach GmbH & Co., 52353 Düren Preßpolster
DE59909907D1 (de) * 1999-03-03 2004-08-12 Heimbach Gmbh Thomas Josef Presspolster
DE59900537D1 (de) * 1999-03-03 2002-01-24 Heimbach Gmbh Thomas Josef Presspolster
US6737370B2 (en) * 2000-03-21 2004-05-18 Rheinische Filztuchfabrik Gmbh Press pad containing fluoroelastomer or fluorosilicone elastomer priority claim
DE20011030U1 (de) * 2000-06-21 2001-08-02 Heimbach Gmbh Thomas Josef Preßpolster sowie Heizplattenpresse sowie Plattenpresse mit solchen Preßpolstern
EP1300235B1 (de) * 2001-09-27 2005-03-09 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Presspolster
DE20115945U1 (de) * 2001-09-27 2001-12-13 Heimbach Gmbh Thomas Josef Preßpolster
ATE402809T1 (de) * 2002-07-31 2008-08-15 Rheinische Filztuchfabrik Gmbh Presspolster

Also Published As

Publication number Publication date
DE502006001815D1 (de) 2008-11-27
RU2006137992A (ru) 2008-05-10
ES2314800T3 (es) 2009-03-16
EP1779999A1 (de) 2007-05-02
CN1966794A (zh) 2007-05-23
PL1779999T3 (pl) 2009-04-30
HK1104326A1 (en) 2008-01-11
CN1966794B (zh) 2012-02-15
PT1779999E (pt) 2008-12-15
RU2417893C2 (ru) 2011-05-10
US20070099529A1 (en) 2007-05-03
DE202005016935U1 (de) 2006-01-26
ATE411158T1 (de) 2008-10-15

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