US20040023582A1 - Press pad for multi-daylight presses - Google Patents

Press pad for multi-daylight presses Download PDF

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Publication number
US20040023582A1
US20040023582A1 US10/617,977 US61797703A US2004023582A1 US 20040023582 A1 US20040023582 A1 US 20040023582A1 US 61797703 A US61797703 A US 61797703A US 2004023582 A1 US2004023582 A1 US 2004023582A1
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US
United States
Prior art keywords
thread
press pad
press
threads
pad according
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.)
Abandoned
Application number
US10/617,977
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English (en)
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.)
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
Application filed by Rheinische Filztuchfabrik GmbH filed Critical Rheinische Filztuchfabrik GmbH
Assigned to RHEINISCHE FILZTUCHFABRIK GMBH reassignment RHEINISCHE FILZTUCHFABRIK GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ESPE, ROLF
Publication of US20040023582A1 publication Critical patent/US20040023582A1/en
Abandoned legal-status Critical Current

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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]
    • Y10T442/3179—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

Definitions

  • the present invention relates to a press pad having a fabric whose warp and/or weft each have alternating types of threads having different elasticities transverse to the thread axis, distinguished in that these types of thread have polymer material with high temperature stability.
  • Press pads are used in hydraulic heated presses, single or multi-daylight presses, high-pressure presses, or other presses for plastic coating or lamination of derived timber product slabs or for the production of circuit boards, for example.
  • the press pads lie on both sides between the pressure sheets resting on the material to be pressed and the press plates. Through their properties, for comparatively large tolerances, they are to ensure uniform transfer of the pressure over the entire surface for both the components of the press and the material to be pressed. Convex or concave warping of the press plates through differing heat dissipation or faulty grinding of the material to be pressed may thus be compensated for.
  • the press pad must provide as little resistance as possible to their deformation, but must have the greatest possible elastic recovery in the event of intermittent pressure load.
  • press pads must be suitable for use at temperatures up to more than 200° C. and again allow uniform and, particularly for use in short cycle presses, rapid thermal transfer over the complete surface.
  • Press pads are typically made of a fabric which, depending on the intended purpose, may also have a coating on one or both sides. Such fabrics are known to one skilled in the art in multiple embodiments using both metal and polymer threads in the thread systems, preferably with warp and weft in linen weave or twill weave and in other types of textures and weaves.
  • Press pads according to the species have at least two different types of threads, having differing elasticities transverse to the thread axis, in at least one thread system in the fabric.
  • both the compressibility transverse to the thread axis and the flexural strength of a thread are included by this concept.
  • Each of these two properties shapes the elasticity of a press pad, which is correspondingly used simultaneously as a term for its compressibility and flexural strength.
  • Such press pads are known, for example, from the brochure “Press Pads for Short Cycle Presses” of Rheinische Filztuchfabrik GmbH, Stolberg/Germany under the trade name SINAS® UNIVERSAL.
  • the fabric of these press pads has a warp made of an aramid multifilament twisted with copper threads, while the weft is made alternately of bunched copper threads and an elastomer-sheathed textile multifilament.
  • These press pads according to the species are distinguished by outstanding padding effect and a high thermal resistance in combination with very good heat transfer, which may even be increased further by elevating the proportion of copper threads, and are used especially for producing laminated flooring plates in modern short cycle multi-daylight presses.
  • the present invention is based on the object of suggesting a press pad, using which the equalization of different pressures is improved in relation to the known press pads.
  • the recovery of a press pad and/or the padding property results from the type of fabric construction and/or from the pad material used.
  • the elasticity of the elastomers is determined by their Shore hardness, their density, and their permanent set (22 hours at 175° C.).
  • the object is achieved according to the present invention in that these types of threads have polymer material with high temperature stability.
  • Investigations have shown that the fabric of the press pad according to the present invention has different Shore hardness and density and significantly improves the compensation of different pressures in comparison to the press pads known according to the species.
  • Alternating according to the present invention is understood to mean both, for example, a sequence of two types of thread A and B as . . . A-B-A-B . . . , but also . . . A-A-B-AA-B . . . and, for example, for three types of thread A, B, and C, sequences such as . . . A-B-C-AB-C . . . , but also . . . A-B-C-B-A-B-C-B-A . . . or other patterns having thread arrangements which repeat regularly in the fabric.
  • the types of threads preferably each have polymer material in their lateral surfaces. In this way, the compression of the threads transversely to the thread axis is made easier in particular.
  • the polymer material used in the threads is preferably a silicon or fluorosilicone elastomer, a blend of the materials cited above, or another elastomer material with high temperature stability.
  • the Shore hardness of the elastomer may be adjusted to the desired value in the way known to one skilled in the art, through fillers such as quartz powder or metal oxides, for example.
  • the use of bunched or stranded polymer fibers in at least one type of thread is also conceivable.
  • the bunching or stranding particularly allows the use of duroplastic fibers for producing a type of thread having higher elasticity transverse to the thread axis.
  • At least one type of thread in the fabric of the press pad according to the present invention has a polymer sheathing and a core made of a material having a sufficiently large tensile strength for weaving purposes.
  • the deformability may be adjusted individually longitudinally and transversely to the threads.
  • the core of at least one of the threads is preferably essentially made of metal in order to ensure thermal conduction through the press pad, as well as its good weavability and dimensional stability.
  • metal in this case, copper, but also brass or stainless steel, depending on the application, are preferably used.
  • threads whose core is essentially made of polyamide may preferably be used.
  • the use of a pure elastomer thread suggested in WO 96/13376 is hardly advisable from a weaving viewpoint, since loops and warping which project out of the press pad may arise through warping of individual fibers in their lengthwise direction. Processability and dimensional stability during operation is only ensured with a core of high tensile strength.
  • the Shore hardness and therefore the transverse elasticity of the elastomer thread, which is essential in operation are hardly influenced in comparison to a metallic core.
  • Aromatic polyamide fibers are preferably used, such as those marketed by DuPont Inc. under the trade names KEVLAR® and NOMEX®, for example. In principle however, any other type of fiber with high temperature stability which has sufficient tensile strength, such as the melamine resin fiber from BASF marketed under the trade name BASOFIL®.
  • a preferred embodiment has threads with a core made of bunched or stranded fibers. If such threads have high tensile strength - particularly if non-metallic materials are used high transverse elasticity of the press pad according to the present invention may nonetheless be achieved in this way.
  • threads have a core made of a monofilament. Thus—particularly using a metal wire—the dimensional stability of the press pad according to the present invention may be ensured in an especially advantageous way.
  • a press pad according to the present invention woven with warp and weft, whose weft alternately has one thread of each of the different types of thread, is especially preferred.
  • two threads of one type may be followed by one thread of a second type or nearly any other arbitrary numerical combination may also be implemented.
  • FIGURE shows a detail of a section transverse to the weft direction through the fabric of a press pad occurring to the present invention, the warp threads not being shown.
  • the fabric of the press pad according to the present invention has a brass strand made of 7 single wires, each with a diameter of 0.2 mm, as the warp.
  • the press pad and its fabric per se are not shown, like the warp.
  • the fabric alternately has a first thread 2 and a second thread 3 .
  • the first thread 2 has a first core 4 , which is bunched from eight (8) symbolically indicated copper wires, each having a diameter of 0.2 mm.
  • the first core 4 is enclosed by a first sheath 5 , having a diameter of 1.5 mm, made of a blend elastomer of 15% fluorosilicone and 85% pure silicone rubber.
  • the first sheath 5 has a Shore hardness of 70-75 and an overall density of 2.15 g/cm 3 , and is therefore harder than the second sheath 7 , having a Shore hardness of 70-75 and an overall density of 1.38 g/cm 3 .
  • This press pad according to the present invention displays a hydraulic padding effect over its surface, which reacts to different pressures and accordingly equalizes them.
  • a very good padding effect is achieved, particularly a very homogeneous pressure distribution over the press pad area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Woven Fabrics (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Bipolar Transistors (AREA)
  • Liquid Crystal (AREA)
US10/617,977 2002-07-31 2003-07-11 Press pad for multi-daylight presses Abandoned US20040023582A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10235065.5-26 2002-07-31
DE10235065 2002-07-31

Publications (1)

Publication Number Publication Date
US20040023582A1 true US20040023582A1 (en) 2004-02-05

Family

ID=30010542

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/617,977 Abandoned US20040023582A1 (en) 2002-07-31 2003-07-11 Press pad for multi-daylight presses

Country Status (5)

Country Link
US (1) US20040023582A1 (de)
EP (1) EP1386723B1 (de)
AT (1) ATE402809T1 (de)
DE (1) DE50310226D1 (de)
ES (1) ES2311079T3 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070099529A1 (en) * 2005-10-28 2007-05-03 Rheinische Press Pad Gmbh Pressure equalization fabric for hydraulic hot press facilities
US20070104771A1 (en) * 2005-09-23 2007-05-10 Jay Audett Transdermal galantamine delivery system
US20090176427A1 (en) * 2007-12-28 2009-07-09 Hansen Robert A Ultra-Resilient Fabric
US20090181590A1 (en) * 2007-12-28 2009-07-16 Hansen Robert A Ultra-Resilient Pad
US20100112275A1 (en) * 2007-12-28 2010-05-06 Hansen Robert A Ultra-Resilient Pad
US20100129597A1 (en) * 2007-12-28 2010-05-27 Hansen Robert A Ultra-Resilient Fabric
US8535484B2 (en) 2011-01-21 2013-09-17 Albany International Corp. Ultra-resilient fabric and method of making thereof
US20220009189A1 (en) * 2019-03-19 2022-01-13 Hueck Rheinische Gmbh Press pad for single level or multi-level hot press

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1974896A1 (de) * 2007-03-26 2008-10-01 Heimbach GmbH & Co. KG Presspolster mit Randverstärkung
DE202007006849U1 (de) 2007-05-10 2008-06-26 Heimbach Gmbh & Co. Kg Presspolster mit Randverstärkung
DE102010036539B4 (de) 2010-07-21 2013-04-11 Hueck Rheinische Gmbh Presspolster für eine hydraulische Presse
DE202021003665U1 (de) 2021-12-02 2022-12-07 Hueck Rheinische Gmbh Druckausgleichskörper, insbesondere Presspolster zur Ausrüstung von hydraulischen Ein- und Mehretagenheiz- und Kühlpressen
DE202022002690U1 (de) 2022-12-30 2024-01-04 Hueck Rheinische Gmbh Presspolster universal einsetzbar und Fixierung desselben in hydraulischen Mehretagenpressen mit Aufheizung und Rückkühlung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851681A (en) * 1973-04-18 1974-12-03 Albany Int Corp Woven papermaking drainage fabric having four shed weave pattern and weft threads of alternating diameter
US4423755A (en) * 1982-01-22 1984-01-03 Huyck Corporation Papermakers' fabric
US4909284A (en) * 1988-09-23 1990-03-20 Albany International Corp. Double layered papermaker's fabric
US5298322A (en) * 1990-12-31 1994-03-29 Rheinische Filztuchfabrik Gmbh Press pad for high-pressure presses
US5855733A (en) * 1994-10-26 1999-01-05 Marathon Belting Limited Press pad
US6040253A (en) * 1994-11-25 2000-03-21 Rheinische Filztuchfabrik Gmbh Press pad for high-pressure and low-pressure presses
US20010029139A1 (en) * 2000-03-21 2001-10-11 Rolf Espe Press pad containing fluoroelastomer or fluorosilicone elastomer priority claim
US6339032B2 (en) * 1996-10-30 2002-01-15 Rheinische Filztuchfabrik Gmbh Press pad made of asbestos-free material
US6342457B1 (en) * 1999-03-03 2002-01-29 Thomas Josef Heimbach Gesellschaft Mit Beschrankter Haftung & Co. Pressing cushion

Family Cites Families (4)

* 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
DE29721495U1 (de) * 1997-12-05 1998-02-19 Thomas Josef Heimbach GmbH & Co., 52353 Düren Preßpolster
ATE203953T1 (de) * 1999-03-03 2001-08-15 Heimbach Gmbh Thomas Josef Presspolster
DE20011030U1 (de) * 2000-06-21 2001-08-02 Thomas Josef Heimbach GmbH, 52353 Düren Preßpolster sowie Heizplattenpresse sowie Plattenpresse mit solchen Preßpolstern

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851681A (en) * 1973-04-18 1974-12-03 Albany Int Corp Woven papermaking drainage fabric having four shed weave pattern and weft threads of alternating diameter
US4423755A (en) * 1982-01-22 1984-01-03 Huyck Corporation Papermakers' fabric
US4909284A (en) * 1988-09-23 1990-03-20 Albany International Corp. Double layered papermaker's fabric
US5298322A (en) * 1990-12-31 1994-03-29 Rheinische Filztuchfabrik Gmbh Press pad for high-pressure presses
US5855733A (en) * 1994-10-26 1999-01-05 Marathon Belting Limited Press pad
US6040253A (en) * 1994-11-25 2000-03-21 Rheinische Filztuchfabrik Gmbh Press pad for high-pressure and low-pressure presses
US6339032B2 (en) * 1996-10-30 2002-01-15 Rheinische Filztuchfabrik Gmbh Press pad made of asbestos-free material
US6342457B1 (en) * 1999-03-03 2002-01-29 Thomas Josef Heimbach Gesellschaft Mit Beschrankter Haftung & Co. Pressing cushion
US20010029139A1 (en) * 2000-03-21 2001-10-11 Rolf Espe Press pad containing fluoroelastomer or fluorosilicone elastomer priority claim
US6737370B2 (en) * 2000-03-21 2004-05-18 Rheinische Filztuchfabrik Gmbh Press pad containing fluoroelastomer or fluorosilicone elastomer priority claim

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070104771A1 (en) * 2005-09-23 2007-05-10 Jay Audett Transdermal galantamine delivery system
US20070099529A1 (en) * 2005-10-28 2007-05-03 Rheinische Press Pad Gmbh Pressure equalization fabric for hydraulic hot press facilities
US10590569B2 (en) 2007-12-28 2020-03-17 Albany International Corp. Ultra-resilient fabric
US20090181590A1 (en) * 2007-12-28 2009-07-16 Hansen Robert A Ultra-Resilient Pad
US20100112275A1 (en) * 2007-12-28 2010-05-06 Hansen Robert A Ultra-Resilient Pad
US20100129597A1 (en) * 2007-12-28 2010-05-27 Hansen Robert A Ultra-Resilient Fabric
US10590571B2 (en) 2007-12-28 2020-03-17 Albany International Corp. Ultra-resilient pad
US20090176427A1 (en) * 2007-12-28 2009-07-09 Hansen Robert A Ultra-Resilient Fabric
US10588375B2 (en) 2007-12-28 2020-03-17 Albany International Corp. Ultra-resilient pad
US10590568B2 (en) 2007-12-28 2020-03-17 Albany International Corp. Ultra-resilient fabric
CN102459731A (zh) * 2009-06-05 2012-05-16 阿尔巴尼国际公司 超回弹性织物
US8535484B2 (en) 2011-01-21 2013-09-17 Albany International Corp. Ultra-resilient fabric and method of making thereof
US20220009189A1 (en) * 2019-03-19 2022-01-13 Hueck Rheinische Gmbh Press pad for single level or multi-level hot press

Also Published As

Publication number Publication date
EP1386723A2 (de) 2004-02-04
ES2311079T3 (es) 2009-02-01
EP1386723B1 (de) 2008-07-30
EP1386723A3 (de) 2004-06-02
ATE402809T1 (de) 2008-08-15
DE50310226D1 (de) 2008-09-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: RHEINISCHE FILZTUCHFABRIK GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ESPE, ROLF;REEL/FRAME:014283/0944

Effective date: 20030610

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION