US3545370A - Continuous press for laminating materials - Google Patents

Continuous press for laminating materials Download PDF

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Publication number
US3545370A
US3545370A US741755A US3545370DA US3545370A US 3545370 A US3545370 A US 3545370A US 741755 A US741755 A US 741755A US 3545370D A US3545370D A US 3545370DA US 3545370 A US3545370 A US 3545370A
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United States
Prior art keywords
press
platen
unconnected
members
belt
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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 - Lifetime
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US741755A
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English (en)
Inventor
Robert A Caughey
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Weyerhaeuser Co
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Weyerhaeuser Co
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    • 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
    • B27D3/04—Veneer presses; Press plates; Plywood presses with endless arrangement of moving press plates, belts, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
    • 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

Definitions

  • the upper surface of the upper platen is in sliding contact with a series of keyed-together plates, each of the keyed-together plates having separate hydraulic rams acting downwardly on each plate to furnish the required pressure necessary to laminate or consolidate the materials fed into the press.
  • unconnected platen members are driven by a series of hydraulically operated driving pinions located along each side of the press and engageable with gear racks on the underside of the unconnected platen membens.
  • the driving pinions are spaced a distance apart less than the length of the individual, unconnected platen members.
  • the unconnected platen members are returned from the outfeed end of the conveyor to the infeed end by means of a hydraulically operated elevator which lowers each of the plates at the outfeed end onto a conveying chain running in a direction opposite the travel of the press.
  • the conveying chain returns the platen member to the infeed end where it is raised into operating position.
  • a hydraulically operated crowder advances it into contact with the first set of driving pinions which advance it into the press. Switches or other sensing devices are used to coordinate operation of the elevating and crowding mechanisms.
  • This invention relates to a continuous press for laminating wood and wood products, and consolidating wood fibrous materials.
  • thermosetting resins particles bonded together by thermosetting resins (particleboard)
  • This press comprises a stationary lower platen and an upper platen defining a passage for the material therebetween.
  • Over the lower platen is located a series of contiguous, unconnected plates in sliding relation with the lower platen, the plates driven by a single hydraulic ram at the infeed end of the press.
  • Over the upper platen is trained a continuous belt in sliding contact with the upper platen, the belt driven through the press solely by frictional engagement of the belt with the material in contact with the lower platen members being driven through the press.
  • press described has inherent limitations as to size and pressure when used in the lamination of wood and wood products.
  • the method described in the above-mentioned patent for advancing the contiguous, unconnected platen members through the press by means of a single hydraulic ram is unsuited to commercial production because of the heavy stresses imposed on the means to advance the plates through the press, particularly when high pressures are used.
  • the improved press of this invention comprises a series of contiguous, unconnected rigid platen members resting on a rigid supporting bearing surface, the platen members forming a lower platen for the press, and an upper platen disposed above the lower platen and substantially parallel thereto, the upper platen consisting of a continuous, movable belt sliding directly on a lubricated, low friction surface.
  • the low friction surface consists of a series of short plates keyed together with each plate having a separate hydraulic rain acting downwardly thereon so as to provide requisite pressure necessary for laminating materials together.
  • the lower, unconnected platens are driven through the press by a plurality of power means spaced adjacent each of the lower platen members and engageable therewith, each of the power means spaced a distance less than the length of the individual unconnected platen members.
  • the power means generally comprises a series of hydraulically operated motors which drive driving pinions located on each side of the press, the pinions engageable with gear racks located on the under surface of the contiguous, unconnected, rigid platen members.
  • the contiguous, unconnected, lower platen members are returned from the outfeed end of the press to the infeed end by the combination of a hydraulically operated mechanism which lowers the individual platens out of contact with the material being fed through the press as an exit from the outfeed end of the press onto a conveyor chain which moves the members to the infeed end of the press.
  • a similar hydraulically operated elevating means lifts the platen members to its normal operating position in contact with the material being pressed.
  • a hydraulically operated crowding means located at the infeed end of the press and at the same level as the platens being driven through the press engages the raised platen member and advances it into abutting relationship with the preceeding platen and subsequently into engagement with the first set of driving pinions of the multidrive system for movement through the press.
  • Sensing means comprising switches, photo cells, or other means are used to coordinate lowering, raising and crowding of the unconnected platen members in conjunction with operation of the press.
  • FIG. 1A is a side elevation of the entry or infeed end of the improved press with parts broken away for better illustration.
  • FIG. 1B is a side elevation of the exit or outfeed end of the improved press.
  • FIG. 2 is a view along section line 2-2 of FIG. 1A.
  • FIG. 3 is a view along section line 33 of FIG. IA.
  • FIG. 4 is a view along section line 4-4 of FIG. 1B.
  • FIGS. 1A and 1B The various parts of the machine are shown in FIGS. 1A and 1B and are mounted on a frame consisting of a pair of side members 1 and 2. Each of the side members comprises a lower portion and an upper portion, the two connected together by stress rods 3 which are adjustable.
  • a bearing member 4 is permanently fixed between side panels I and 2 in any convenient manner. The top surface of member 4 is preferably highly polished to reduce friction. Resting on bearing member 4 and in sliding contact therewith are a series of rectangular, contiguous, unconnected platens 5 which form the lower platen of the press. These platens travelthrough the press from the infeed end to the exit end thereof in contiguous, unconnected relation and slide freely between members 1 and 2 and on bearing member 4.
  • the series of platens 5 are moved through the press by pairs of individually hydraulically driven driving pinions 6 located on each side of the press and preferably spaced at distance apart less than the length of the individual unconnected platens 5.
  • Driving pinions 6 engage gear racks 7 located on the undersurface of each of the platens 5.
  • a suitable power source such as individual hydraulic motors 8 are connected to each of the driving pinions 6 by means of sprockets 9 and 10 connected together by chains 11.
  • Drive shafts l2 connect each of the hydraulic motor pairs located on each side of the press in order to synchronize their operation.
  • the platens 5 can be,
  • the pinions 6 can be on a common
  • the drawings indicate driving pinions extending the full length of the press, there is usually no need to extend them to the discharge end.
  • the spacing of the motors and driving pinions is a function of platen loading which, at the discharge end of the press, is not significant.
  • This multipoint drive system distributes the total force required for advancing the series of platens 5 through the press equally among the driving pinions so that no pinion is overloaded. Without the multiple drive system severe limitations would be placed on the press with respect to maximum size and pressure. For example, assuming a press 12% wide and 24 long, a pressure on the workpiece of 200 p.s.i., and an overall coefficient of friction on 0.1, the total driving force required for forcing the series of platens therethrough would be approximately 72,000 lbs. A two pinion drive would, of necessity, have to pull approximately 36,000 lbs., necessitating special large gears, shafts and motors. In the improved press of this invention the total load is shared. Using the same example, if 24 2-inch diameter gears are used, each pinion would be torqued to 3,000 pound inches which is well within limit of standard gears and motors.
  • the upper platen 13 consists of a continuous, steel belt or belt of other suitable metal.
  • the upper belt serves only as a continuous bearing and is moved by the product being pressed. It is not under severe tension, and guiding and band tracking problems are substantially reduced.
  • the band is trained around a circular surface 14 at the exit end of the press and follows along the top of the press 15 and 16 in returning to the infeed end.
  • Pressure is exerted on belt or upper platen 13 by a series of short plates 17 keyed together at 18.
  • a series of hydraulic rams 19 connected to the supporting frame have their pistons attached to each individual plate 17. Plates 17 are in sliding contact with belt 13.
  • a suitable lubricant may be injected by injecting means 17', shown schematically in FIG. 3, between belt 13 and plates 17 to minimize friction therebetween.
  • a pressure profile through the press is possible, allowing optimum pressure conditions for the particular product desired.
  • the press can be operated so as to have a high initial pressure followed by decreasing pressure; a gradually increasing, then decreasing pressure; or a gradually increasing pressure. This pressure flexibility enables manufacture of specialty products where closely controlled conditions are needed.
  • the mechanism to lower each of the unconnected platens at the outfeed end of the press comprises a hydraulically operated table 20 which, in raised position, is in line with the path of platens 5 through the press.
  • a hydraulic cylinder 21 operates table 20.
  • a control device 20 is positioned so as to actuate lowering of table 20 when one of the platens 5 is resting thereon.
  • Hydraulic cylinder 21 lowers table 20 and the platen plate 5 to the level of conveyor chains 22 trained around sprockets 23.
  • the return conveyor may have a nylon bearing surface so that platens 5 are not damaged during their conveyance from the outfeed to the infeed end of the conveyor.
  • another hydraulic cylinder 24 attached to table 25 is actuated by a suitable control device 24.
  • the table raises the platen 5 in the path of crowder member 26 and in position for entry into the press.
  • Crowder member 26 is attached to another hydraulic cylinder 27 which is actuated by control device 27 as soon as platen 5 is raised to the proper position.
  • the crowder member advances platen 5 into engagement with the first set of driving pinions 6 at the infeed end of the press and into contiguous relationship with the next adjacent platen 5.
  • the operation of cylinders 21,24, and 27 is synchronized by suitable control devices 21,24' and 27' so that the lowering, raising, and crowding functions are performed in relation to overall operation of the press.
  • sheets of wood veneer 28 or other material are fed into the infeed end of the press.
  • wood veneer it is usually preheated and coated with a suitable thermosetting adhesive for bonding the wood laminae together.
  • the laminae are then brought into contact as they approach the nip end of the press.
  • the length and width of the press can be adjusted to suit purposes desired.
  • As the laminae enter the press they are compressed to such a degree that the internal friction between the laminae greatly exceeds the friction between belt 13 and plates 17 and also the friction between the laminae and belt 13. This permits the transmission from the moving series of platens 5 to the belt 13 of a force sufficient to advance belt 13 through the press.
  • Wood products overlayed with plastic or fibrous material mixed with suitable thermosetting resins can also be laminated.
  • An improved press for manufacturing composite or laminated wood materials comprising:
  • a supporting frame having thereon a substantially horizontal, rigid, supporting bearing surface
  • a continuous, movable belt having an undersurface disposed in spaced relation to the lower platen and defining a passageway, the belt adapted to be driven solely by forces transmitted to it from the lower platen through the material as it is fed between the lower platen and belt;
  • means for driving the lower, unconnected platen members comprising a plurality of power means spaced adjacent the platen members and engageable therewith individually to distribute the driving load along the path of said platen members.
  • each of the unconnected, rigid platen members has gear racks located on its undersurface and wherein the power means comprises a series of driving pinions engageable with the gear racks on the unconnected, rigid platen members.
  • the pressure means includes a plurality of separate plates in slidable contact with the belt and a plurality of hydraulic rams acting downwardly on each plate.
  • Apparatus according to claim 5 including means for injecting a lubricant between the plates in a slidable contact with the belt and the belt.
  • An improved press for manufacturing composite or laminated wood materials comprising:
  • a supporting frame having thereon a substantially horizontal, rigid supporting bearing surface
  • a continuous, movable belt having an undersurface disposed in spaced relation to the lower platen and adapted to be driven by the force transmitted to it from the lower platen through the material fed between the lower platen and upper belt;
  • means for returning the unconnected platen members from the outfeed end of the press to the infeed end comprising:
  • a. lowering means to individually and separately lower each of the unconnected members out of contact with the material fed into the press at the outfeed end thereof;
  • conveying means to convey the platen members from the outfeed end to the infeed end of the press
  • elevating means to individually and separately elevate each of the unconnected platen members to its operating position in contact with the material being pressed
  • crowding means located at the infeed end of the press and in line with the platen member to push the member into engagement with the first set of driving pinions at the infeed end of the press and into contiguous relations with the next adjacent platen member;
  • sensing means for synchronizing lowering, raising and crowding of the platen members in coordination with operation of the press.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Press Drives And Press Lines (AREA)
US741755A 1968-07-01 1968-07-01 Continuous press for laminating materials Expired - Lifetime US3545370A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74175568A 1968-07-01 1968-07-01

Publications (1)

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US3545370A true US3545370A (en) 1970-12-08

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Application Number Title Priority Date Filing Date
US741755A Expired - Lifetime US3545370A (en) 1968-07-01 1968-07-01 Continuous press for laminating materials

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US (1) US3545370A (enrdf_load_stackoverflow)
DE (1) DE1932236A1 (enrdf_load_stackoverflow)
FR (1) FR2012034A1 (enrdf_load_stackoverflow)
GB (1) GB1271258A (enrdf_load_stackoverflow)
SE (1) SE340354B (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638953A (en) * 1969-05-29 1972-02-01 Sony Corp Recording and reproducing apparatus using magnetic tape cassette
US3779686A (en) * 1971-02-25 1973-12-18 I Kerttula Continuous action sheet press
US3792953A (en) * 1971-08-10 1974-02-19 Kuesters E Maschf Machine for compressing a traveling web
US3795470A (en) * 1971-07-14 1974-03-05 Mets Nv Konstruktienerkhuizen Press for continuously producing chip board, fiber board or the like
US3883285A (en) * 1973-04-19 1975-05-13 Konstruktiewerkhuizen Demets N Continuously operating press for chipboards, fiberboards, or the like
US3883284A (en) * 1973-04-19 1975-05-13 Kronstrukiewerkhuizen De Mets Continuously operating rough or final press
US3887318A (en) * 1972-03-08 1975-06-03 Baehre & Greten Continuously operating press
US3942929A (en) * 1972-03-08 1976-03-09 Bison-Werke Bahre & Greten Gmbh & Co. Kg Continuously operating press
US5493961A (en) * 1993-12-11 1996-02-27 G. Siempelkamp Gmbh & Co. Continuous board-making press including press plate deformation safety device
CN100395094C (zh) * 2005-03-01 2008-06-18 西姆佩尔坎普机械设备制造有限责任公司和两合公司 连续式压制机
CN102886919A (zh) * 2012-09-28 2013-01-23 上海板机电气制造有限公司 一种热压板弯曲保护装置及其保护方法
US20160144578A1 (en) * 2012-10-30 2016-05-26 The Boeing Company Apparatus for Forming Thick Thermoplastic Composite Structures
CN114571835A (zh) * 2022-02-10 2022-06-03 溧阳市诚亿布业有限公司 一种涂层牛津布生产装置

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638953A (en) * 1969-05-29 1972-02-01 Sony Corp Recording and reproducing apparatus using magnetic tape cassette
US3779686A (en) * 1971-02-25 1973-12-18 I Kerttula Continuous action sheet press
US3795470A (en) * 1971-07-14 1974-03-05 Mets Nv Konstruktienerkhuizen Press for continuously producing chip board, fiber board or the like
US3792953A (en) * 1971-08-10 1974-02-19 Kuesters E Maschf Machine for compressing a traveling web
US3887318A (en) * 1972-03-08 1975-06-03 Baehre & Greten Continuously operating press
US3942929A (en) * 1972-03-08 1976-03-09 Bison-Werke Bahre & Greten Gmbh & Co. Kg Continuously operating press
US3883285A (en) * 1973-04-19 1975-05-13 Konstruktiewerkhuizen Demets N Continuously operating press for chipboards, fiberboards, or the like
US3883284A (en) * 1973-04-19 1975-05-13 Kronstrukiewerkhuizen De Mets Continuously operating rough or final press
US5493961A (en) * 1993-12-11 1996-02-27 G. Siempelkamp Gmbh & Co. Continuous board-making press including press plate deformation safety device
CN1042508C (zh) * 1993-12-11 1999-03-17 G·西蒙培尔肯普有限公司 用于生产木屑板、纤维板或类似压制板的连续式压力机
DE4342279C2 (de) * 1993-12-11 2002-04-18 Siempelkamp Gmbh & Co Kg G Kontinuierliche Presse für die Herstellung von Spanplatten, Faserplatten, Laminatplatten und ähnlichen Preßgutplatten
CN100395094C (zh) * 2005-03-01 2008-06-18 西姆佩尔坎普机械设备制造有限责任公司和两合公司 连续式压制机
CN102886919A (zh) * 2012-09-28 2013-01-23 上海板机电气制造有限公司 一种热压板弯曲保护装置及其保护方法
CN102886919B (zh) * 2012-09-28 2016-05-18 上海板机电气制造有限公司 一种热压板弯曲保护装置及其保护方法
US20160144578A1 (en) * 2012-10-30 2016-05-26 The Boeing Company Apparatus for Forming Thick Thermoplastic Composite Structures
US10207466B2 (en) * 2012-10-30 2019-02-19 The Boeing Company Apparatus for forming thick thermoplastic composite structures
CN114571835A (zh) * 2022-02-10 2022-06-03 溧阳市诚亿布业有限公司 一种涂层牛津布生产装置
CN114571835B (zh) * 2022-02-10 2024-03-26 溧阳市诚亿布业有限公司 一种涂层牛津布生产装置

Also Published As

Publication number Publication date
DE1932236A1 (de) 1970-01-15
FR2012034A1 (enrdf_load_stackoverflow) 1970-03-13
GB1271258A (en) 1972-04-19
SE340354B (enrdf_load_stackoverflow) 1971-11-15

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