EP0634253A2 - Presse, en particulier presse à plateux pour le travail du bois - Google Patents

Presse, en particulier presse à plateux pour le travail du bois Download PDF

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Publication number
EP0634253A2
EP0634253A2 EP94103642A EP94103642A EP0634253A2 EP 0634253 A2 EP0634253 A2 EP 0634253A2 EP 94103642 A EP94103642 A EP 94103642A EP 94103642 A EP94103642 A EP 94103642A EP 0634253 A2 EP0634253 A2 EP 0634253A2
Authority
EP
European Patent Office
Prior art keywords
press
hoses
plate
rows
pressure
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
EP94103642A
Other languages
German (de)
English (en)
Other versions
EP0634253A3 (fr
EP0634253B1 (fr
Inventor
Gerald Handke
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.)
Gottfried Joos Maschinenfabrik GmbH and Co
Original Assignee
Gottfried Joos Maschinenfabrik GmbH and Co
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 Gottfried Joos Maschinenfabrik GmbH and Co filed Critical Gottfried Joos Maschinenfabrik GmbH and Co
Publication of EP0634253A2 publication Critical patent/EP0634253A2/fr
Publication of EP0634253A3 publication Critical patent/EP0634253A3/fr
Application granted granted Critical
Publication of EP0634253B1 publication Critical patent/EP0634253B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B30B15/062—Press plates
    • B30B15/064—Press plates with heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D3/00—Veneer presses; Press plates; Plywood presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/003—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by an elastic bag or diaphragm expanded by fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/02—Presses characterised by a particular arrangement of the pressing members having several platens arranged one above the other

Definitions

  • the invention relates to a press, in particular a plate press for woodworking or the processing of similar workpieces.
  • the press is e.g. Designed for gluing plate-shaped materials under temperature and pressure, especially for the production of veneered or plastic-coated boards.
  • Plate presses are known from EP 141 801 B1 and EP 176 498 B1, in which the pressing force is applied by pneumatically inflatable hoses. Such plate presses manage with relatively little mechanical effort and are therefore particularly suitable for repair shops, etc.
  • the object of the invention is to further develop plate presses of this type and, in particular, to enlarge their area of use and thus to make them more universally applicable.
  • This object is achieved according to the invention in that in a press with a press drive by pneumatically expandable Hoses at least two rows of hoses are provided one above the other.
  • a vertically movable rigid intermediate plate can be provided between the two rows of tubes, which has a mechanically compensating effect and thus promotes a uniform application of the pressing force.
  • the press can have a rigid frame-shaped press frame with a stiffened upper and lower support plate. Due to the large stroke, it is possible without any adjustment means, i.e. to capture a relatively large range of workable plate thicknesses with rigid carrier plates.
  • the press is therefore very simple, since the upper and lower plates can be simple rigid structures, for example composed of double flange supports.
  • the upper of these carrier plates can each carry a pressing surface forming a pressing surface on its underside and the upper row of tubes on its upper side.
  • the heating plates can have a plate-shaped base body with electrical heating conductors inserted in grooves, which are covered by a cover plate, and with a high-pressure insulating plate are highlighted. This enables the electrical heating of the carrier plates to carry out hot working or pressing operations requiring heat.
  • the hoses of the rows of hoses can each lie vertically one above the other so that hardly any bending forces are applied to the intermediate plates and the force flow is introduced as directly as possible from the pressing surface into the lower carrier plate. If even larger strokes are required, more than two rows of hoses can be used. Although a horizontal arrangement (vacuum press) with a movable pressing surface underneath is preferred, other arrangements with several hose levels can also be implemented. Separate hoses should be used in the rows one above the other.
  • the hoses are preferably arranged in the longitudinal direction of the press. You get by with a smaller number of hoses and still ensure a tight occupancy.
  • the ends of the hoses, and in particular their end pneumatic connections, can be staggered in the longitudinal direction of the hose.
  • the tubes can be arranged in a small space and with only a small thickness of the intermediate plate, despite certain thickenings at the ends and in particular the connections, because the end connections are then staggered. It is thus advantageously also possible to make the hoses of the two rows of hoses the same length in each case.
  • the hoses of the two rows of hoses are supplied with compressed air from different sides, that is to say their end connections are in each case at opposite hose ends. This will not only ensures that the hose connections, which may take up space, can be better arranged, but also that the pressing process is evened out, particularly at the beginning of the pressing process.
  • the pneumatic pressure in each hose is evenly adjusted at every point, due to various influences, e.g. the inflation characteristics of the hoses, certain restoring forces in the hose material itself, etc.
  • the hose normally begins to inflate first and only then the pressure afterwards Forward over the entire length of the hose. Due to the opposing arrangement of the blowing sides, the press plate remains horizontal without further measures being necessary.
  • a similar effect can be achieved if adjacent hoses of the same row are connected at different ends, although the intermediate plate may then be subjected to a more uneven load.
  • the drawings show a press 11, seen from the end face 42.
  • the right side is cut on the one hand and shown on the other hand in the closed state, while the left side of the drawing shown in view shows the plate in the open state.
  • a press frame 12 has an upper and a lower support plate 13, 14, which are each composed of wide-flange double-T supports running in the longitudinal direction of the plate and thus form a stiffened structure with individual longitudinal chambers. These carrier plates are so designed that they maintain their flatness even with the strongest achievable pressing pressures.
  • the long rectangular support plates 13, 14 are connected to one another by vertical supports 15, which protrude from the underside above the lower plate 14 and have rollers 16 there, so that the press can be moved easily.
  • Two rows of tubes 20, 21 are arranged on the lower carrier plate 14, each underlaid by intermediate plates 17, 18. They consist of hoses 19 made of flexible material, for example rubber or plastic, possibly with fabric inserts or the like, and extend over the entire length of the press (see FIG. 2).
  • the hoses of the two rows of hoses are of equal length, but, as can be seen from FIG. 2, are offset from one another in such a way that their ends 22 and / or possibly connections 23 are offset from one another.
  • Each hose has a pneumatic connection 23 which is supplied by one or more distributors 24 (in FIG. 6: two distributors) and a common compressed air connection 25. This is preceded by a single pneumatic circuit 26, not shown, which is supplied by a conventional compressed air network 27 or a compressor.
  • the pneumatic circuit 26 (FIG. 6) contains a pressure regulator 50, on which the desired pressing pressure can be set. This pressure can be read off a manometer 51.
  • a switched in the pneumatic line 52 safety solenoid valve 53 ensures that the press can only be closed by pressurization when a switch 54 is closed, which is part of a protection against accidental contact, for example by a safety line running around the press. In conjunction with switch 54, it ensures that the press cannot be closed as long as an operator still has a hand in the press or the like.
  • the trigger pulse for closing the press is given via a valve 55 and a button 56.
  • the pressure is released to open the press via a 3-way ball valve 57 with a large outlet cross section, which may discharge the compressed air from the hoses via a silencer 58.
  • a safety valve 59 secures the pneumatic system against excess pressure.
  • a pressure transfer valve 61 is provided in a pneumatic line 60 that branches off behind the pressure regulator, but upstream of the safety valve 53.
  • This is a non-electrically operated, but exclusively pneumatically operated valve, which has a control feedback 62 in the press direction. It can be set so that it opens when the pressure falls below a set value and compensates for any pressure losses in the system.
  • Fig. 1 shows that the tubes of both rows are arranged parallel to each other and one above the other. Their spacing is to be chosen at least so large that the hoses can lie next to one another on the intermediate plates 17, 18 in the flat, ie unfilled state.
  • a heating plate 29 lies on an upper plate 28, which covers the upper row of tubes, and is vertically movable together with the latter.
  • a corresponding heating plate 29 is also accommodated on the underside of the upper carrier plate 13. Their heating surfaces facing each other form the upper and lower pressing surfaces 30.
  • the structure of the heating plates 29 can be seen from FIG. 3.
  • the base body 31 of the heating plate is plate-shaped and has grooves 32 on the top for receiving heating conductors 33.
  • the base body is made of aluminum.
  • the heating conductors 33 contain electrical heating resistors 34, which are surrounded by electrical insulation 35, for example by means of multiple glass fiber braiding and braiding with a protective film made of polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the grooves 32 are covered by a cover plate 36 in the form of a sheet made of a good heat-conducting alloy which is attached to the base body 31 by gluing.
  • the base body 31 is underlaid by an insulating layer 37 made of high-pressure mineral fiber, under which a high-pressure insulating plate 38 made of highly compressed fiber material (chipboard or the like), optionally with a phenol resin bond, is arranged.
  • This heating plate has very good heat transfer properties towards the pressing surface 30, while the rear is provided with an effective insulation that can withstand the high pressing pressures.
  • the lower heating plate 29 is displaceably guided relative to its substructure.
  • the heating plate 29 has guide strips 65 on two of its outer longitudinal sides, which extend along the outer edges 66 of the insulating plate 38. This is firmly connected to the plate 28 covering the hoses 19 upwards, while the heating plate 29 rests on it only in a pressure-transmitting manner.
  • the heating plate, sliding on the insulating plate 38 can in the example shown be pulled out of the press frame by about half until a stop 68 stops the further displacement and thus the heating plate 29 tilts prevented. With appropriate comprehensive guidance, however, further pulling out could also be permitted.
  • the electrical connection of the lower heating plate takes place via a flexible cable 69 from a connecting device 70, so that the heating plate movement is possible is.
  • the heating plate can thereby be partially pulled out of the press for easier loading and / or cleaning.
  • the heating conductors are provided with a heating control, which is not shown in detail and can also contain thermal control elements for heating.
  • the press works as follows: In the open state of the press (Fig. 1 left), the lower pressing surface 30 is loaded with the material to be pressed, the press gap 40 being quite large and allowing convenient loading.
  • the pull-out of the heating plate 29 (FIG. 5) further facilitates the loading.
  • the hoses 19 in the hose rows 20 and 21 are depressurized and emptied, so that they form two flat layers 41.
  • compressed air is admitted into the hoses 19, namely in both positions from two different end faces 42 of the press (FIGS. 2 and 3) via the pneumatic circuit 26 and the distributors 24 and the pneumatic connections 23.
  • the pressure regulator 50 is set to the desired pressing pressure and the button 56 is actuated so that the valve 55 opens.
  • the safety valve 53 stops the pressure build-up when it is closed by opening the safety switch.
  • the hoses fill up, lifting the intermediate plates 17 and 28 and the heating plate 29 fastened thereon and the workpiece placed thereon, and finally pushing them against the underside of the upper one Heating plate 29. Both plates can be heated.
  • the uniform application of pressure to the entire pressing surface by the hoses results in a very uniform contact pressure without the need for major mechanical effort. It is only necessary to ensure that the intermediate plates 17 and 28 and the lower heating plate 29 can move vertically.
  • a press stroke of about 120 mm is possible guarantee.
  • the hoses are clamped at their ends between guide strips 43, which also ensure the necessary spacing of the hoses from one another.
  • the per se circular, flexible hoses 19 lie flat against the plates 17, 18, 28 and thus transmit the pressure well distributed. Since the valve 55 had closed again after the button 56 had been released, the pressure take-over valve 61 ensures that the pressure set there or at the pressure regulator 50 is not fallen below if a pressure loss occurs due to leakages.
  • the air is released from the hoses 19, specifically via the ball valve 57 and reducing the pressure on the regulator 50, as a result of which the lower pressing surface is lowered and the workpiece can be removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Press Drives And Press Lines (AREA)
EP94103642A 1993-05-19 1994-03-10 Presse, en particulier presse à plateux pour le travail du bois Expired - Lifetime EP0634253B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9307632U DE9307632U1 (de) 1993-05-19 1993-05-19 Presse, insbesondere Plattenpresse für die Holzbearbeitung
DE9307632 1993-05-19

Publications (3)

Publication Number Publication Date
EP0634253A2 true EP0634253A2 (fr) 1995-01-18
EP0634253A3 EP0634253A3 (fr) 1995-05-31
EP0634253B1 EP0634253B1 (fr) 2000-07-26

Family

ID=6893501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94103642A Expired - Lifetime EP0634253B1 (fr) 1993-05-19 1994-03-10 Presse, en particulier presse à plateux pour le travail du bois

Country Status (4)

Country Link
US (1) US5487332A (fr)
EP (1) EP0634253B1 (fr)
AT (1) ATE194940T1 (fr)
DE (2) DE9307632U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111716466A (zh) * 2020-07-06 2020-09-29 李敏 一种双面自清洁的木工冷压机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2116499T3 (es) * 1994-10-12 1998-07-16 Hymmen Theodor Gmbh Dispositivo para la fabricacion continua de materiales planos en varias capas.
EP0712717B1 (fr) * 1994-11-18 1999-08-11 Rudolf Steinkogler Presse pneumatique à plateaux
RU2283220C1 (ru) * 2005-04-04 2006-09-10 Государственное образовательное учреждение высшего профессионального образования "Брянская государственная инженерно-технологическая академия" Устройство для склеивания древесных слоистых материалов
RU2295438C1 (ru) * 2005-07-25 2007-03-20 Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" ГОУ ВПО "ТОГУ" Пресс для склеивания щита
DK176689B1 (da) * 2007-10-04 2009-02-23 Tp Holding Hadsund Aps Apparat til sammenklemning samt fremgangsmåde og anvendelse af apparat
EA011436B1 (ru) * 2008-07-01 2009-02-27 Артур Робертович Кочаров Способ изготовления деревянных щитов и пресс для его осуществления

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735461A (en) * 1956-02-21 pater
DE14892C (de) * L. E. JANNIN in Paris Abkühlvorrichtung an hydraulischen Pressen zur. Herstellung von CHches und anderen Abdrücken aus Celluloid
US2363779A (en) * 1942-06-25 1944-11-28 Beech Aircraft Corp Hose actuated press
US2411043A (en) * 1943-11-24 1946-11-12 Edward J Klassen Thermopressure gluing press
CH273477A (de) * 1949-05-06 1951-02-15 Steinemann Ulrich Ag Luftdruckpresse, die zum Furnieren dient.
US3318232A (en) * 1963-04-29 1967-05-09 Robert R Bartron Apparatus for forming sheet plastic and laminating it to an underlayment
US3213739A (en) * 1963-09-09 1965-10-26 Neo Ray Products Inc Fluid actuated press
CH449933A (de) * 1966-03-11 1968-01-15 Johann Langzauner & Sohn Heizplatte für Furnierpressen
DE6604075U (de) * 1967-03-08 1969-12-18 Stegherr L Kolben-zylindervorrichtung,insbesondere fuer furnier-und massivkanten-anleimmaschinen
US3667891A (en) * 1969-08-13 1972-06-06 Owens Corning Fiberglass Corp Molding press
US3771438A (en) * 1971-10-12 1973-11-13 L Radakovich Means for molding
US4190484A (en) * 1975-10-20 1980-02-26 Rembert Duvelius Press for producing shaped articles
DE2920926A1 (de) * 1979-05-23 1980-11-27 Friz Helmut A Dipl Ing Formenpresse
DD144522A1 (de) * 1979-06-25 1980-10-22 Klaus Beyer Furnierpresse
SU887160A1 (ru) * 1980-07-21 1981-12-07 Институт Организации И Технологии Сельского Строительства Казахской Сср Пресс дл склеивани дерев нных полотен
EP0069771A4 (fr) * 1981-01-16 1984-03-01 Builders Equip Co Systeme de moulage de blocs.
US4429629A (en) * 1981-10-13 1984-02-07 Leonard Frank W Press construction
AT385457B (de) * 1983-03-16 1988-04-11 Elkom Elektroheizplatten Techn Elektroheizplatte fuer hydraulische pressen
AT377942B (de) * 1983-09-14 1985-05-28 Steinkogler Rudolf Plattenpresse
AT379770B (de) * 1984-09-14 1986-02-25 Steinkogler Rudolf Holzbearbeitungsmaschine
US4816103A (en) * 1987-04-21 1989-03-28 Ethan Ernest Process for manufacturing corrugated plywood composites

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111716466A (zh) * 2020-07-06 2020-09-29 李敏 一种双面自清洁的木工冷压机

Also Published As

Publication number Publication date
EP0634253A3 (fr) 1995-05-31
ATE194940T1 (de) 2000-08-15
US5487332A (en) 1996-01-30
EP0634253B1 (fr) 2000-07-26
DE9307632U1 (de) 1993-09-02
DE59409458D1 (de) 2000-08-31

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