EP2409829A2 - Coussinet de pressage pour une presse hydraulique - Google Patents

Coussinet de pressage pour une presse hydraulique Download PDF

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Publication number
EP2409829A2
EP2409829A2 EP11173211A EP11173211A EP2409829A2 EP 2409829 A2 EP2409829 A2 EP 2409829A2 EP 11173211 A EP11173211 A EP 11173211A EP 11173211 A EP11173211 A EP 11173211A EP 2409829 A2 EP2409829 A2 EP 2409829A2
Authority
EP
European Patent Office
Prior art keywords
layer
channels
press pad
press
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.)
Withdrawn
Application number
EP11173211A
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German (de)
English (en)
Other versions
EP2409829A3 (fr
Inventor
Martin Marxen
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
Publication of EP2409829A2 publication Critical patent/EP2409829A2/fr
Publication of EP2409829A3 publication Critical patent/EP2409829A3/fr
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the invention relates to a press pad for a hydraulic press having a first fluid impermeable layer comprising an elastomeric material and fibers associated therewith and having a second layer joined to the first layer which is also impermeable to fluids.
  • Such a press pad is from the EP 0 235 582 A2 known.
  • the prior art press pad is intended to serve in particular in the production of multilayer and flexible printed circuit boards for printed electronic circuits in so-called high-pressure presses.
  • Press pads for the production of materials for electronic printed circuit boards are manufactured using high pressures (up to about 1000 N / cm 2 or 100 bar) and at the same time high temperatures (up to about 220 ° C) by means of a lamination process.
  • the sandwiched press pads contain a reinforcing layer of fibers, for example in the form of a central fiberglass fabric, in order to reduce the deformation both in the pressing operation as well as in the removal of the finished pressed material and the assembly with a new compact and thus to increase the service life of the press pad.
  • non-stick layers for example in the form of a film of polytetrafluoroethylene (PTFE)
  • PTFE polytetrafluoroethylene
  • press cushions are also very frequently used in the production of wood-based materials with a coated surface.
  • Such laminates are used primarily in the field of furniture production and as flooring materials.
  • on wood fiber boards (“chipboard” or MDF boards) decorative layers in the form of abrasion-resistant plastic films with a variety of decors (wood imitation, tile replica, stone replica, etc.) are applied.
  • the connection between the decorative layer and the carrier material of the fiberboard is typically carried out using melamine resin, which under the action of pressure and temperature (up to 50 bar or 500 N / cm 2 pressing pressure and up to 220 ° C pressing temperature) is cured in a laminating press.
  • the press pads has the task of compensating for thickness or height tolerances in the hydraulic press area.
  • thickness or height differences come about by deviations in the area of the material to be pressed (fiberboard or decorative film or printed circuit board starting materials), but especially in the press itself.
  • the press lines typically dimensions of their heated press plates of a few meters, so that in addition to manufacturing tolerances also problems with a distortion of the plates by different temperature distribution in the press operation occur. Even with the so-called press plates, which come into contact with the pressed material on both sides, dimensional tolerances can occur.
  • press pads a first important characteristic of press pads is the compensation of such dimensional tolerances in the area of the system "hot plate press plate pressed product press plate hot plate".
  • the press pad In order to exercise such a thickness compensation permanently, without damaging the press pad, the press pad must have sufficient elastic, that is, spring properties, have that convict it automatically after a pressure relief back to its original shape.
  • spring properties elastomeric materials are used in the known press pads to obtain the desired spring properties. Silicone elastomers or fluoroelastomers or fluorosilicone elastomers in particular are frequently used in press pads because of their good temperature resistance and their resistance to various chemical substances.
  • press pads Due to the good thermal conductivity to be demanded of press pads, which enables the necessary rapid heat flow from the hot plate, via the press pad and the press plate into the pressed material, press pads regularly comprise constituents of good heat-conductive materials, in particular of metals. Often copper and / or brass and / or stainless steel and / or other metal alloys are used for this purpose.
  • a press pad with a closed material layer is for example from the DE 23 19 593 A or the EP 1 300 235 A known.
  • a supporting fabric is used in the silicone elastomer used embedded for example of bronze threads.
  • a superficial projection of the metallic support fabric provided over the elastomeric material is used in order to increase the thermal conductivity.
  • particles with higher thermal conductivity metal powder, quartz powder can also be introduced into the elastomer material.
  • press pads are also in many press pads to textile fabrics, which may be designed in particular as a woven, knitted or non-woven.
  • a good shape change capability and therefore a good thickness compensation are ensured.
  • the threads have a high inherent elasticity in a direction transverse to its longitudinal axis, in particular made of elastomeric material or have a tensile core (made of metal or a synthetic fiber), which is coated with an elastomeric material.
  • Such press pads are for example from the EP 0 735 949 A , of the EP 1 136 248 A and the EP 1 779 999 A known in the form of woven press pads.
  • Press pads based on crocheted fabrics are especially in the EP 1 033 237 A , of the EP 1 040 910 A and the EP 1 040 909 A disclosed.
  • the press pad is from the EP 1 386 723 A known to use alternately coated with elastomer threads, whose elasticity is transverse to the longitudinal axis of the thread alternately higher or lower.
  • press pads or press pad press plate combinations are known in which a contiguous cavity of the press pad or the combination is filled with a flowable material at the operating temperature of the press ( EP 2 189 276 ).
  • press pads which are designed as a textile fabric, comparatively expensive to manufacture. This is especially true when covered threads are used, possibly in different ways, including in the first step, the material of the soul must be provided in the course of an extrusion process with the elastomeric material of the shell.
  • the textile technology processing (weaving or knitting), which takes place in a second step, once again requires a great deal of effort, since the processed elastomeric threads or metal threads, in contrast to conventional textiles, are much more difficult and can be processed at a lower speed.
  • the invention has for its object to propose a press pad, which is characterized by a good punctual elasticity, at the same time as easy to manufacture.
  • the underlying object is achieved in that the first layer is provided on its side facing the second layer with a plurality of channels in which there is a flowable material at least at the operating temperature of the press and the at least sealed fluid-tight by the second layer.
  • the elasticity properties of the pad can be set very individually and easily over its surface. Also, on the elastic properties of the elastomeric material on the one hand and the flowable material at operating temperature of the material in the channels on the other hand, the cushioning properties can be varied according to the invention within very wide limits. In addition, it is easily possible to realize different effective elasticities in different zones of the press pad.
  • a third layer is provided, which is connected on the side facing away from the second layer of the first layer with this and is also impermeable to fluids.
  • the first layer is also provided on its side facing the third layer with a further plurality of channels, or the third layer is provided on its side facing the first layer with a further plurality of channels.
  • the third layer comprises an elastomeric material and associated fibers.
  • the further plurality of channels is fluid-tightly sealed by the connection between the first layer and the third layer.
  • the press pad according to the invention based on existing press systems, rectangular and in at least one edge region, preferably circumferentially in all edge regions, free of channels.
  • the width depending on the respective Schuplattenformates, the at least one edge region is preferably between 1 cm and 20 cm.
  • edge regions it is possible in a simple manner to produce a full-surface, continuous fluid-tight connection between the first layer and the second layer or the first layer and the third layer, since a comparatively large-area contact can be realized.
  • the edge regions are therefore particularly suitable for closing the channels in their frontal direction in order to achieve the fluid tightness in this direction.
  • first layer and the second layer and / or the first layer and the third layer are adhesively bonded or welded to one another, wherein in particular the technique of laser welding or ultrasonic welding can also be advantageously used.
  • the plurality of channels comprises a first group of channels which run parallel to one another, wherein preferably there is a second group of channels, which in turn run parallel to each other and perpendicular to the channels of the first group.
  • the channels of both groups communicate with each other or not.
  • a system of intersecting and interconnected channels thus arises. These then preferably extend within a plane or form a single "channel layer".
  • the two groups do not communicate with each other, they are preferably spaced apart as seen in the thickness direction of the press pad, resulting in two separate "channel layers".
  • the channels can be introduced into the relevant layer by molding technology, in particular by casting or doctoring into a suitable mold or by forming, in particular by embossing, stamping or cutting, or by removal, in particular by laser processing or milling ,
  • a certain number of channels or all channels should be completely filled with the material flowable at the operating temperature of the press.
  • a “flowable material at the operating temperature of the press” is any fluid, that is both a compressible fluid (gas) but also any incompressible fluid (liquid) are understood.
  • the material can also be in solid state at temperatures below the operating temperature.
  • Suitable fluids for the press pad according to the invention are in particular air or other (inert) gases or oils (mineral or synthetic oils or mixtures thereof) or (inert) liquids or metals with a low melting point. These are, in particular, lead or tin or alloys which contain at least one of the abovementioned elements and which may be in a solid state of aggregation at room temperature.
  • the plurality of channels may also be partially arranged both in the first and the second layer, as well as in the first and third layers, it is particularly advantageous for the second layer and / or the third layer for a film to be easier to produce having a thickness of between 10 ⁇ m and 1000 ⁇ m and comprising or consisting of a polymer, preferably for example polytetrafluoroethylene (PTFE) or fluororubber or silicone or fluorosilicone elastomers.
  • PTFE polytetrafluoroethylene
  • the first layer and / or the second layer and / or the third layer may comprise a support fabric, which in the elastomeric material, preferably a silicone elastomer or a fluoroelastomer or a fluorosilicone elastomer or a blended elastomer containing at least two of the aforementioned elastomers is embedded.
  • a measure increasing the stability of the press pad can be that the fibers contained in at least the first layer high-temperature synthetic fibers, in particular those of aramid, Kevlar, polyester, melamine resin, carbon, glass, or metal wires, in particular those of brass, copper, stainless steel ,
  • the fibers may be in the form of monofilament or multifilament yarns, preferably the fibers being present as individual staple fibers with a length of between 1 mm and 50 mm and / or in the form of a textile fabric, in particular a woven, knitted, knitted, laid or nonwoven fabric ,
  • the elastomeric material of the first layer and / or the third layer and / or the material flowable at the operating temperature of the press may contain particles having a high thermal conductivity, in particular metal powder or quartz powder. This makes it possible to accelerate heat transfer to the material to be pressed, in particular in press systems which are operated with short cycle times, which in turn allows the heating plate temperature to be selected to be lower.
  • the area fraction of the channels is between 5% and 50%, preferably between 10% and 20%. If channels are arranged in multiple "channel layers", the channels must be considered in all layers. If the channels are arranged congruently one above the other in several layers, only the channels of a single layer, in the calculation of the aforementioned area ratio, are to be used.
  • an inhomogeneous distribution of the channels can be provided.
  • the inhomogeneity may be of the shape that in certain areas of the press pad, the distance of adjacent channels to each other is greater or smaller than in other areas of the press pad and / or in certain areas of the press pad, the dimensions of the channels, in particular their width and / or Depth is greater or less than in other areas of the press pad.
  • the width of the channels between 5 mm and 20 mm and / or the depth of the channels, measured in a direction perpendicular to a surface of the press pad, between 1 mm and 5 mm and / or the clear distance adjacent, parallel channels from each other between 1 mm and 50 mm.
  • FIG. 1 schematically illustrated press 1 is constructed mirror-symmetrically to a horizontal center plane 2 and has two provided with a plurality of heating channels 3 heating plates 4, and two metallic press plates 5, facing with their facing each other, in particular engraved, surfaces in the middle arranged pressed material.
  • the product to be pressed is, for example, an MDF board to be coated, which is covered on both sides with a decorative film which is to be connected to the MDF board by means of a melamine resin under pressure and temperature.
  • a press pad 7 protrudes with edge regions 8 on all sides on the rectangular heating plate 4 and the same dimension having press plate 5 addition, which serves for fastening purposes.
  • the structure of the press pad 7 is in the vertical section according to FIG. 2 closer illustrated.
  • the press pad 7 is shown in a kind of exploded view, in which a central first layer 9 and an upper second layer 10 and a lower third layer 11 are spaced apart for clarity. In reality, however, these aforementioned three layers 9, 10, 11 are firmly and in particular fluid-tightly interconnected as will also be explained in more detail below.
  • the press pad 7 and also the first layer 9 are constructed symmetrically to the center plane 2.
  • the middle plane 2 is located in the interior of the first layer 9, embedded in the elastomeric material, in particular silicone elastomer, a support fabric 12 in cloth weave, of which a wavy extending warp thread and the cut weft threads are visible.
  • a support fabric 12 in cloth weave, of which a wavy extending warp thread and the cut weft threads are visible.
  • Above an upper side 13 of the first layer 9 and below a lower side 14 of the first layer 9 are the second layer 10 and the third layer 11.
  • Essential for the press pad 7 according to the invention is the presence of a first plurality of channels 15 in the upper side 13 of the first layer 9 and, in the case of present embodiment - also a second plurality of channels 16 in the bottom 14 of the first layer 9. Both the channels 15 and the channels 16 each extend within their "group", but also with respect to the channels 15, 16 of both groups parallel to each other and are arranged equidistant from each other.
  • the channels 15 in the top 13 of the first layer 9 are offset by the amount of half the distance of each adjacent channels 15, 16 offset from each other, so that there is a typical "gap" arrangement.
  • the top 13 of the first layer 9 is glued or welded to the second layer 10.
  • a possible adhesive layer of a known adhesive is not shown in the figures for the sake of simplicity.
  • the second layer 10 is a foil of, for example, silicone elastomer.
  • edge regions of the press pad 7 are circumferentially free from Channels 15, 16, so that the latter are also closed fluid-tight frontally.
  • the channels 15, 16 are filled with air. But also the filling with any other gas is conceivable, as well as a filling with any liquids or with a metal or a metal alloy, which is or at the operating temperature of the press (from about 80 to 220 ° C) in the liquid state.
  • FIG. 2 In contrast to the three-layer construction according to FIG. 2 owns the press pad 17 according to FIG. 2 only a two-layer construction.
  • the channels 22 are parallel and equidistant in a measured in a direction parallel to the top 21 of the press pad 17 distance 23 to each other.
  • a depth 24 of the channels 22 is (measured from the top 21 of the first layer 19) about 1 mm.
  • a width 25 measured perpendicular to the depth 24 is 2 mm.
  • a thickness 26a of the first layer 19 is 2 mm, whereas a thickness 26b of the second layer 20 is about 1 mm.
  • the press pad 17 according to FIG. 3 not only has a first group of mutually parallel channels 22, but also a second group of perpendicular thereto, running parallel and equidistant within the second group channels 28. In this way, a kind of check pattern is formed on the top 21 of the first layer 19 ,
  • FIG. 6 illustrates that peripheral edge portions 30 of the press pad 17 are free of channels.
  • the edge regions 29, 30 have a width 31, 32 of about 1 cm.
  • the edge regions 29, 30 preferably protrude laterally beyond the heating plates 4 and press plates 5 of the press 1 and thus, unlike a central part of the press pad 17 provided with the channels 22, 28, are not in the area of transmission of compressive forces during the pressing operation. Due to the edge region 29, 30, the channels 22, 28 terminate in front of the edges 33, 34 of the press pad 17 and thus provide a fludend closure of the channels 22, 28 on the face side.
  • FIG. 4 An alternative embodiment of a press pad 27 is shown in a vertical section in FIG FIG. 4 shown.
  • the press pad 27 consists of a first layer 39 and a fluid-tightly bonded thereto second layer 40, both of which consist of an elastomeric material, in particular a silicone elastomer and both have the same thickness 35 of about 1 mm.
  • the equidistant and mutually parallel channels 36 of the press pad 27 have a circular cross-section and are each formed in half in the first layer 39 and the second layer 40.
  • each layer 39, 40 are thus semi-circular in cross-section channel halves, which complement each other when joining the identically constructed first and second layers 39, 40 to the complete channel 36 with circular cross-section.
  • the diameter 37 of the channels 36 is 1.5 mm, which corresponds to a (length) proportion of about 43% with a total thickness 41 of the press pad of 3.5 mm.
  • the elastomeric materials of all the aforementioned press pads 7, 17, 27 may be provided with particles of heat-conductive material, in particular metal powder, for the purpose of increasing the thermal conductivity.
  • particles of heat-conductive material in particular metal powder
  • the material with which the channels 15, 16, 22, 28 are filled provided that this is a liquid, such as oil.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP11173211.1A 2010-07-21 2011-07-08 Coussinet de pressage pour une presse hydraulique Withdrawn EP2409829A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010036539A DE102010036539B4 (de) 2010-07-21 2010-07-21 Presspolster für eine hydraulische Presse

Publications (2)

Publication Number Publication Date
EP2409829A2 true EP2409829A2 (fr) 2012-01-25
EP2409829A3 EP2409829A3 (fr) 2013-10-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11173211.1A Withdrawn EP2409829A3 (fr) 2010-07-21 2011-07-08 Coussinet de pressage pour une presse hydraulique

Country Status (4)

Country Link
US (1) US8573280B2 (fr)
EP (1) EP2409829A3 (fr)
CN (1) CN102371702A (fr)
DE (1) DE102010036539B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108638565A (zh) * 2018-07-12 2018-10-12 江阴盛鼎机械制造有限公司 一种用于液压机的压力垫

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GB2493738B (en) * 2011-08-17 2014-06-11 Marathon Belting Ltd Improvements to press pads
DE102013100433A1 (de) * 2013-01-16 2014-07-31 Hueck Rheinische Gmbh Presspolster für eine Ein- oder Mehretagenheizpresse
CN104924656A (zh) * 2015-05-31 2015-09-23 南京蒙福液压机械有限公司 一种液压机用液压垫
CN107498952B (zh) * 2017-08-01 2019-10-18 华南理工大学 间位芳纶纤维/玻璃纤维纸基覆铜箔层压板及其制造方法
DE102018133542A1 (de) * 2018-12-21 2020-06-25 Hueck Rheinische Gmbh Presspolster sowie Verfahren zu dessen Herstellung
IT202100005288A1 (it) * 2021-03-08 2022-09-08 Euronobilitazione S R L Dispositivo e metodo per l’applicazione di fogli in rilievo su pannelli
US20240291010A1 (en) * 2021-05-13 2024-08-29 The Trustees Of The Stevens Institute Of Technology Nafion Self-Bonding for Cost-Effective Rapid Assembly of a Thin Flexible Fuel Cell by a Template-Based Thermal Sealing Process
DE202022002690U1 (de) * 2022-12-30 2024-01-04 Hueck Rheinische Gmbh Presspolster universal einsetzbar und Fixierung desselben in hydraulischen Mehretagenpressen mit Aufheizung und Rückkühlung

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DE2319593A1 (de) 1973-04-18 1974-11-14 Becker & Van Huellen Druckkompensator fuer heizplattenpressen
EP0235582A2 (fr) 1986-02-27 1987-09-09 Hewlett-Packard Company Coussinet de presse composite
EP0735949A1 (fr) 1994-10-26 1996-10-09 Marathon Belting Limited Coussinet pour presse
EP1033237A1 (fr) 1999-03-03 2000-09-06 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1040910A1 (fr) 1999-03-03 2000-10-04 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1040909A1 (fr) 1999-03-03 2000-10-04 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1136248A1 (fr) 2000-03-21 2001-09-26 RHEINISCHE FILZTUCHFABRIK GmbH Coussinet de pressage
EP1300235A1 (fr) 2001-09-27 2003-04-09 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1386723A2 (fr) 2002-07-31 2004-02-04 RHEINISCHE FILZTUCHFABRIK GmbH Coussinet pour presse
EP1779999A1 (fr) 2005-10-28 2007-05-02 Rheinische PRESS PAD GmbH Tissu d'équilibrage de pression pour installation hydraulique de pressage à chaud
EP2189276A1 (fr) 2008-11-25 2010-05-26 Hueck Rheinische GmbH Presse à plaques et unité de coussin de presse pour tôle de presse

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Publication number Priority date Publication date Assignee Title
DE2319593A1 (de) 1973-04-18 1974-11-14 Becker & Van Huellen Druckkompensator fuer heizplattenpressen
EP0235582A2 (fr) 1986-02-27 1987-09-09 Hewlett-Packard Company Coussinet de presse composite
EP0735949A1 (fr) 1994-10-26 1996-10-09 Marathon Belting Limited Coussinet pour presse
EP1033237A1 (fr) 1999-03-03 2000-09-06 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1040910A1 (fr) 1999-03-03 2000-10-04 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1040909A1 (fr) 1999-03-03 2000-10-04 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1136248A1 (fr) 2000-03-21 2001-09-26 RHEINISCHE FILZTUCHFABRIK GmbH Coussinet de pressage
EP1300235A1 (fr) 2001-09-27 2003-04-09 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Coussinet pour presse
EP1386723A2 (fr) 2002-07-31 2004-02-04 RHEINISCHE FILZTUCHFABRIK GmbH Coussinet pour presse
EP1779999A1 (fr) 2005-10-28 2007-05-02 Rheinische PRESS PAD GmbH Tissu d'équilibrage de pression pour installation hydraulique de pressage à chaud
EP2189276A1 (fr) 2008-11-25 2010-05-26 Hueck Rheinische GmbH Presse à plaques et unité de coussin de presse pour tôle de presse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108638565A (zh) * 2018-07-12 2018-10-12 江阴盛鼎机械制造有限公司 一种用于液压机的压力垫

Also Published As

Publication number Publication date
RU2011130371A (ru) 2013-01-27
US8573280B2 (en) 2013-11-05
DE102010036539B4 (de) 2013-04-11
US20120018933A1 (en) 2012-01-26
DE102010036539A1 (de) 2012-01-26
CN102371702A (zh) 2012-03-14
EP2409829A3 (fr) 2013-10-16

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