EP0184766B1 - Verfahren und Vorrichtung zum Beheizen der erwärmbaren Maschinenteile bei einer Doppelbandpresse - Google Patents

Verfahren und Vorrichtung zum Beheizen der erwärmbaren Maschinenteile bei einer Doppelbandpresse Download PDF

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Publication number
EP0184766B1
EP0184766B1 EP85115386A EP85115386A EP0184766B1 EP 0184766 B1 EP0184766 B1 EP 0184766B1 EP 85115386 A EP85115386 A EP 85115386A EP 85115386 A EP85115386 A EP 85115386A EP 0184766 B1 EP0184766 B1 EP 0184766B1
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EP
European Patent Office
Prior art keywords
transfer medium
heat transfer
machine parts
temperature
heated
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.)
Expired
Application number
EP85115386A
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German (de)
English (en)
French (fr)
Other versions
EP0184766A1 (de
Inventor
Kurt Held
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0184766A1 publication Critical patent/EP0184766A1/de
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Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1741—Progressive continuous bonding press [e.g., roll couples]

Definitions

  • the invention relates to a method for heating the heatable machine parts in a double belt press by means of a heated heat transfer medium flowing through the machine parts. Furthermore, the invention relates to a device for carrying out such a method with a heating device that heats the heat transfer medium and is connected to a first and a second side of the machine part that can be heated via supply and return lines for the heat medium.
  • the invention has for its object to develop a generic method so that no local temperature differences occur in the heatable machine parts of a double belt press that could affect the quality of the material to be pressed.
  • the solution according to the invention consists in periodically reversing the direction of flow of the heat transfer medium at certain time intervals.
  • a device for performing the method according to the invention has a reversing valve through which both sides of the machine part can be connected alternately to the supply and return lines of the heating device.
  • a press belt 8 or 9 is guided, usually a high-tensile steel belt.
  • One of the upper and lower deflection drums is driven in a manner not shown.
  • the direction of rotation is indicated by arrows in the deflection drums 4.
  • reaction zone 10 Between the two press belts 8, 9 lies the so-called reaction zone 10 in the interior of the double belt press, in which a material web 11 which runs from right to left in FIG. 1 and which can consist, for example, of laminates impregnated with synthetic resin, fiber-binder mixtures or the like, using Heat and pressure is compressed.
  • the deflection drums 4 arranged on the inlet side of the machine have, in their cylinder wall, axially parallel channels 12 through which a heated heat transfer medium, for example a thermal oil, circulates, which is supplied and removed in a known manner.
  • a heated heat transfer medium for example a thermal oil
  • the jacket of the deflection drum in question is heated by heat exchange with this heat transfer medium preheated to a certain high temperature.
  • the heat is transferred from the drum by heat conduction to the press belts 8, 9, which they then give off to the material web 11, for example for the purpose of curing the resin.
  • the pressure to be exerted on the material web 11 in the reaction zone 10 is applied hydraulically or mechanically to the inner sides of the press belts 8, 9 by pressure plates 13, 14.
  • the reaction forces that occur are passed on from the pressure plates 13, 14 into the machine frame of the double belt press 1.
  • a plurality of support beams 16, 17 with a double-T profile are attached to one another on the pressure plates 13, 14 and extend over the entire width of the press 1.
  • Head plates 18, 19 are welded onto the front and rear end faces of the support beams 16, 17, which in turn are screwed to the bearing bridges 2, 3.
  • the bearing bridges 2, 3 contain hydraulic cylinders 20, 21 with which the press belts 8, 9 can be tensioned.
  • the pair of upper bearing brackets 2 is supported on the lower pair of bearing brackets 3 via screw spindles 22.
  • the screw spindles 22 are used to adjust the height of the reaction zone 10 between the belts 8, 9.
  • FIG. 2 shows, the lower bearing bridge 3 on the rear of the double belt press 1 is supported cantilevered between legs 23 of two L-shaped stands 24.
  • the stands 24 are in turn fastened in a stationary, heavy base plate 25.
  • Arms 26 protrude from the part of the upper bearing bridge 2 on the right in FIG. 2, which are braced via a coupling 27 with the stand 24, so that overall there is a stable, self-supporting arrangement, which requires the replacement of the press belts from the front of the Press 1 allowed here.
  • machine parts of the double belt press 1 are heated.
  • These machine parts include in particular the pressure plates 13, 14. Longitudinal bores 28 (see also FIG. 3) are provided in these plates, through which a heated heat transfer medium can flow. The inflow and outflow of the heat transfer medium takes place via transverse collecting lines 52, 53 which are formed on opposite sides of the pressure plates 13, 14.
  • the webs in the double-T profiles of the support beams 16, 17 are also provided with bores 49, through which a heat transfer medium also flows for the purpose of heating.
  • Heatable compensating flanges 30, 31 are welded onto those flanges of the support beams 16, 17 which face away from the reaction zone 10. Bores 32 are also machined into these flanges 30, 31, through which a heat transfer medium can also flow.
  • the heat transfer medium passes through a continuous cycle in the heatable machine parts mentioned, it being in a heating device, for. B. an oil burner, is itself heated, then flows through the lines or channels of the parts to be heated, to then return cooled to the heater.
  • a heating device for. B. an oil burner
  • the heat transfer medium circulating in the bores 12 of the deflecting drum 4, or in the bores 32 of the compensating flanges 30, 31, for example continuously emits heat to the relevant machine parts, as a result of which it continuously becomes colder.
  • the pressure plate 13 is divided into two symmetrical parts A and B in the middle by an (imaginary) dashed line 33.
  • the collecting line 51 is located on the left edge, in part B on the right edge thereof, the collecting line 52.
  • the lines 28, which are designed as longitudinal bores, lead away from these collecting lines 51, 52, which lines the collecting lines 51, 52. 52 connect with each other.
  • the manifolds 51, 52 are connected to the circuit of the heat transfer medium. This is heated in a burner 34, which has a flow line 35 and a return line 36. These lines 35, 36 are connected to a commercially available reversing valve 37, which is remotely controlled via a schematically indicated electromagnet 38. In the position of the reversing valve 37 shown in FIG. 3, the feed line 35 of the burner 34 is connected to the collecting line 51 and the return line 36 is connected to the collecting line 52. Thus, the manifold 51 is connected as an inflow and the manifold 52 as an outlet for the heat transfer medium in the pressure plate 13.
  • the heated heat transfer medium runs via the manifold 51 and the lines 28 first into part A of the plate 13 and then into part B to the manifold 52, from which it returns to the burner 34 via the return line 36.
  • This direction of flow of the heat transfer medium is shown in FIG. 3 with the black arrows 39. Since the heat transfer medium cools itself while flowing through the pressure plate 13, but the amount of heat given off is proportional to the temperature difference between the pressure plate and heat transfer medium, part A of the pressure plate 13 receives a higher temperature than part B.
  • This temperature curve is shown in FIG. 4 for that in Figure 3 shown position of the reversing valve 37 is shown schematically. Accordingly, the temperature T 2 is set on the left edge of part A and the temperature T 1 on the right edge of part B, where T 2 is greater than T 1.
  • the flow direction is reversed by shifting the reversing valve 37 (to the left in FIG. 3), the heat transfer medium heated in the burner is fed from the supply line 35 to the collecting line 52. After flowing through the pressure plate 13, the heat transfer medium finally flows back via the manifold 51 and the valve 37 to the return line 36 of the burner 34.
  • the heat transfer medium flows through the pressure plate 13 in the opposite direction, indicated by the white arrows 40, than in the case determined by the position of the reversing valve 37 in FIG. 3.
  • part B and then part A of the pressure plate 13 are flowed through first.
  • a heat gradient forms from part B to part A, which is also shown in FIG. 4.
  • the right edge of part B has the higher temperature T 2 and the left edge of part A has the lower temperature T 1.
  • the time intervals from the beginning of one phase to the beginning of the next phase are chosen to be the same.
  • the operation is therefore carried out with a constant period.
  • the reversal of the direction of flow of the heat transfer medium can be controlled by a control circuit forming a control loop in such a way that a target temperature which is constant for the machine part to be heated is specified and the actual temperature is recorded at various points on this machine part , then depending on the size of the deviations between the target and actual temperature, the time intervals are changed by the control loop until the target temperature is reached again.
  • FIG. 3 schematically shows a control circuit 41 which on the one hand actuates the reversing valve 37 via the electromagnet 38 and on the other hand is connected via lines 42, 43 to temperature sensors 44, 45, which in turn are arranged in part B or part A of the pressure plate 13.
  • the method of reversing the direction of the heat transfer medium explained with reference to the pressure plate 13 and the associated device can, according to the invention, also be transferred to the other heatable machine parts of the double belt press, in particular to the deflection drums 4, 5, the support beams 16, 17 and the compensating flanges 30, 31
  • the uniform and constant temperature of the machine parts is avoided, changes in the geometry of the press frame due to heat differences are avoided, and there is a very dimensionally stable, evenly treated material web 11 on the outlet side of the double belt press 1
  • a particular advantage of the invention is that it can be implemented without any significant additional manufacturing outlay and, in particular, can also be used on existing double belt presses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
EP85115386A 1984-12-14 1985-12-04 Verfahren und Vorrichtung zum Beheizen der erwärmbaren Maschinenteile bei einer Doppelbandpresse Expired EP0184766B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3445634A DE3445634C2 (de) 1984-12-14 1984-12-14 Verfahren und Vorrichtung zum Beheizen der erwärmbaren Maschinenteile einer Doppelbandpresse
DE3445634 1984-12-14

Publications (2)

Publication Number Publication Date
EP0184766A1 EP0184766A1 (de) 1986-06-18
EP0184766B1 true EP0184766B1 (de) 1988-05-18

Family

ID=6252778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115386A Expired EP0184766B1 (de) 1984-12-14 1985-12-04 Verfahren und Vorrichtung zum Beheizen der erwärmbaren Maschinenteile bei einer Doppelbandpresse

Country Status (6)

Country Link
US (1) US4699676A (enrdf_load_stackoverflow)
EP (1) EP0184766B1 (enrdf_load_stackoverflow)
JP (1) JPS61143140A (enrdf_load_stackoverflow)
CN (1) CN85108808B (enrdf_load_stackoverflow)
DE (1) DE3445634C2 (enrdf_load_stackoverflow)
SU (1) SU1433401A3 (enrdf_load_stackoverflow)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743933C2 (de) * 1987-12-23 1996-08-22 Dieffenbacher Gmbh Maschf Verfahren und Vorrichtung zur Beheizung einer kontinuierlich arbeitenden Heizplattenpresse
DE3834993A1 (de) * 1988-10-14 1990-04-19 Held Kurt Verfahren und vorrichtung zur kontinuierlichen herstellung von laminaten
US5149394A (en) * 1988-10-14 1992-09-22 Kurt Held Method and apparatus for continuously fabricating laminates
GB2230594B (en) * 1989-04-21 1993-09-01 Rolls Royce Plc Heat exchanger
US5213819A (en) * 1990-03-30 1993-05-25 Maschinenfabrik, J. Dieffenbacher Gmbh & Co. Continuously operating press
DK0546402T3 (da) * 1991-12-12 1996-05-13 Baehre & Greten Fremgangsmåde og apparat til kontinuerlig fremstilling af overfladestrukturerede pladebaner og dermed fremstillet spånplade
DE4415415C2 (de) * 1994-05-02 1996-12-19 Brandwijk Systems Programming Kontinuierliche Bandpresse
DE4418064C1 (de) * 1994-05-24 1995-09-07 Illig Maschinenbau Adolf Verfahren zum Temperieren der beiden Werkzeughälften eines Formwerkzeugs zum Tiefziehen einer Kunststoffolie und Vorrichtung zur Durchführung des Verfahrens
US6908295B2 (en) 2000-06-16 2005-06-21 Avery Dennison Corporation Process and apparatus for embossing precise microstructures and embossing tool for making same
DE10114381A1 (de) * 2001-03-23 2002-10-10 Metso Paper Inc Verfahren zur kontinuierlichen Herstellung von Holzspanplatten und ähnlichen bahnförmigen Plattenwerkstoffen und dafür geeignete Doppelbandpresse
JP4443093B2 (ja) * 2001-11-06 2010-03-31 北川精機株式会社 プレス装置およびプレス装置の制御方法
US8100172B2 (en) 2006-05-26 2012-01-24 Tai-Her Yang Installation adapted with temperature equalization system
JP5428703B2 (ja) * 2009-09-24 2014-02-26 富士ゼロックス株式会社 ラミネート装置、及び画像記録体の作製装置
CH706146A2 (de) * 2012-02-29 2013-08-30 Oblamatik Ag Verfahren und System zum Temperieren von Bauteilen.
US9986664B1 (en) * 2014-12-01 2018-05-29 Amazon Technologies, Inc. Variable time delay on datacenter pod direct cooling
CN112792947B (zh) * 2021-02-03 2022-12-13 泗阳所望家居科技有限公司 一种人造颗粒板压制成型方法
CN119974647B (zh) * 2025-04-10 2025-08-22 湖南隆深氢能科技有限公司 一种具有悬臂固定结构的连续热压机

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE512002C (de) * 1930-11-06 Siempelkamp Gmbh & Co Heizvorrichtung fuer Pressplatten
US1951999A (en) * 1929-07-23 1934-03-20 Sprague Specialties Co Press
DE854747C (de) * 1950-09-23 1952-11-06 Motala Verkst Ab Anordnung bei fuer die Herstellung von Holzfaserplatten bestimmten oder anderen Etagenpressen
US3390719A (en) * 1966-03-07 1968-07-02 Foster Wheeler Corp Heat exchanger valve system
US3461953A (en) * 1967-08-15 1969-08-19 Hull Corp Vacuum dryer shelf temperature control
US3568595A (en) * 1967-08-28 1971-03-09 Mccall Corp Apparatus for making letterpress plates
US3583467A (en) * 1969-05-14 1971-06-08 Dow Chemical Co Method for controlling die temperature and for pacing the casting cycle in a metal die casting operation
DE2421296A1 (de) * 1974-05-02 1975-11-13 Held Kg Adolf Verfahren und vorrichtung zum herstellen von endloslaminaten
DE2542547C2 (de) * 1975-09-24 1982-11-11 Universa Heizungssysteme GmbH + Co KG, 4500 Osnabrück Steuerungsverfahren für Fußbodenheizungen sowie Stelleinrichtung zur Durchführung des Verfahrens
DE2757887C2 (de) * 1977-12-24 1979-08-09 Lobscheid, Wolfgang, Dr., 4000 Duesseldorf Reversierkreislauf für Strahlungsheizungen
JPS5514500U (enrdf_load_stackoverflow) * 1978-07-18 1980-01-29
DE3011217A1 (de) * 1980-03-22 1981-10-01 Theodor Hymmen Kg, 4800 Bielefeld Vorrichtung zum zusammenfuegen mehrerer werkstoffschichten
DE3135206C1 (de) * 1981-09-05 1982-10-28 Adolf Illig Maschinenbau Gmbh & Co, 7100 Heilbronn Verfahren zum Regeln der Temperatur des Ober- und Unterteils von Werkzeugen zur Herstellung von Behaeltern aus thermoplastischer Kunststoffolie und Werkzeuge zur Durchfuehrung des Verfahrens
DE3421631C1 (de) * 1984-06-09 1985-09-12 Küsters, Eduard, 4150 Krefeld Verfahren zur Steuerung des Heiz- bzw. Kuehlmediumstroms in einer beheizbaren bzw. kuehlbaren Walze und entsprechende Walzenanordnung

Also Published As

Publication number Publication date
DE3445634A1 (de) 1986-06-19
US4699676A (en) 1987-10-13
DE3445634C2 (de) 1993-12-09
JPH0333108B2 (enrdf_load_stackoverflow) 1991-05-15
SU1433401A3 (ru) 1988-10-23
EP0184766A1 (de) 1986-06-18
CN85108808B (zh) 1988-10-05
CN85108808A (zh) 1986-06-10
JPS61143140A (ja) 1986-06-30

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