EP0473631B1 - A solid glued board press - Google Patents

A solid glued board press Download PDF

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Publication number
EP0473631B1
EP0473631B1 EP90907085A EP90907085A EP0473631B1 EP 0473631 B1 EP0473631 B1 EP 0473631B1 EP 90907085 A EP90907085 A EP 90907085A EP 90907085 A EP90907085 A EP 90907085A EP 0473631 B1 EP0473631 B1 EP 0473631B1
Authority
EP
European Patent Office
Prior art keywords
gluing
glue
nozzles
press
wood strip
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 - Lifetime
Application number
EP90907085A
Other languages
German (de)
French (fr)
Other versions
EP0473631A1 (en
Inventor
Taisto Autio
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.)
AT-INNOVA Oy
Original Assignee
AT-INNOVA Oy
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 AT-INNOVA Oy filed Critical AT-INNOVA Oy
Publication of EP0473631A1 publication Critical patent/EP0473631A1/en
Application granted granted Critical
Publication of EP0473631B1 publication Critical patent/EP0473631B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
    • B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined

Definitions

  • the object of the invention is a solid glued board press, in particular a blockboard press, which includes a glue handling device, two or more glue nozzles, a glue distribution device, strip handling devices to transport the wood strips past the nozzles, and a press section.
  • This press has a pivotable gluing head with one or more gluing nozzles arranged perpendicularly to the direction of flow of the wood strips.
  • a problem with the known gluing presses is the poor controllability of the glue and due to this the unreliability of gluing devices and the difficulty of adjusting the width of the gluing.
  • the intention of this invention is to create a solid glued board press, by means of which the aforementioned defects can be avoided.
  • the invention is especially intended to improve the operation of the gluing head.
  • the principal characteristic features of the invention appear in Claim 1.
  • a gluing press in accordance with the invention the glue is fed precisely over the whole length and breadth of the wood strip.
  • the nozzles are, however, closed between the strips and the operation is thus considerably cleaner than previously.
  • Other advantageous forms of application are shown in connection with the latter example of application.
  • the glued board press consists of wood strip handling devices, a gluing head, and the press itself.
  • the accompanying figures only show the wood strip handling devices at the gluing head and the gluing head itself.
  • the wood strip handling devices move one strip at a time past the gluing head 1 with the aid of a guide plate 19 and counter-wheel 10. By means of these the wood strip pushes in the ball valves of the nozzles 8 of the gluing head and glue extrudes onto the surface of the wood strip. As the wood strip passes the gluing head the balls 7 return to the extreme position by means of the pressure and springs 15 close the nozzles 8.
  • the glue distribution device includes a glue reservoir 20, a pump 12, a return circulation channel and its pressure valve 16, operating valve 11 and the glue channel 21 that leads from it to the nozzles 8.
  • the glue is distributed to each nozzle 8 through separate restriction valves 13. By means of these the flow of the glue is suitably regulated. In certain cases a greater flow is wished for in the upper nozzle than in the lower.
  • the device also includes normal sensor components, by means of which it is known when the wood strip is close to the gluing head, on the basis of which the control valve 11 is switched to the feed position.
  • the gluing nozzles 8 open only when the wood strip pushes the ball of the shut-off device 7 inwards. When the wood strip has passed each nozzle the spring in it pushes the ball shut and the nozzle 8 closes. As long as the nozzles 8 are closed, the pump 12 pushes the glue flow through the pressure valve 16 to the glue reservoir 20.
  • Figure 2 shows the principle of the control of the width of the gluing. Wood strips of different widths 9, 14 can be glued by the same gluing head by adjusting its angle. The line formed by the gluing nozzles 8 is turned in such a way that its width corresponds to that of the wood strip. The figure shows the gluing head and the position of the gluing nozzles 8 for two different widths of strip. The width adjustment is stepless from the minimum wood strip width up to the maximum strip width.
  • the adjustment of the angle takes place by loosening the handwheel 6 and by turning the gluing head 1 round the axle pin 17 then locking the gluing head into the new position by means of the handwheel 6. Height adjustment takes place by turning handwheel 3, when the entire gluing head moves vertically along guide 4.
  • the entire gluing head can be removed from the gluing level by means of operating device 5, which is advantageously a pneumatic cylinder. This kind of removal is necessary for example when a so-called dry joint is required to separate sheets of wood strip from one another.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Coating Apparatus (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Laminated Bodies (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Reinforced Plastic Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Table Devices Or Equipment (AREA)
  • Inert Electrodes (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)

Abstract

The object of the invention is a solid glued board press, in particular a blockboard press, which includes a glue handling device, two or more glue nozzle (8), a glue distribution device, wood strip transportation devices to move a wood strip past the nozzles (8), and a press section. A press in accordance with the invention includes at least two glue nozzles (8) which are located in essentially the gluing level that corresponds to the surface of the wood strip (9), in such a way that when the glue nozzles (8) are turned round an axis that is vertical to the gluing surface the width of gluing can be varied, and that the glue nozzles (8) include shut-off devices (7), which are arranged in such a way that when the wood strip (9) presses the shut-off device (7) it opens the glue nozzle (8), when the glue flows onto the surface of the wood strip (9). The operation of a gluing head is improved by means of the invention.

Description

  • The object of the invention is a solid glued board press, in particular a blockboard press, which includes a glue handling device, two or more glue nozzles, a glue distribution device, strip handling devices to transport the wood strips past the nozzles, and a press section.
  • Various kinds of continuously operating blockboard presses are known. These are typically continuously operating in such a way that wood strips of a particular size are fed to the press as a continual flow at the same time as glue is fed from a nozzle to one vertical surface of the strip. The press includes sensor devices that open the glue channel when a wood strip comes close to the glue nozzle. The glue channel closes when the wood strip leaves the area of influence of another sensor device. After this the strip is taken to a press, in which the strips are placed one after the other to correspond to the desired size of the sheet. One example of a prior art device of this kind is described in EP-A-0 041 033. This press has a pivotable gluing head with one or more gluing nozzles arranged perpendicularly to the direction of flow of the wood strips. A problem with the known gluing presses is the poor controllability of the glue and due to this the unreliability of gluing devices and the difficulty of adjusting the width of the gluing.
  • Several known gluing presses use a glue nozzle of a standard size, in which case glue has spilled over narrow wood strips to a considerable extent. The excess glue can even cause disturbances in operation and at the very least additional cleaning.
  • The intention of this invention is to create a solid glued board press, by means of which the aforementioned defects can be avoided. The invention is especially intended to improve the operation of the gluing head. The principal characteristic features of the invention appear in Claim 1.
  • In a gluing press in accordance with the invention the glue is fed precisely over the whole length and breadth of the wood strip. The nozzles are, however, closed between the strips and the operation is thus considerably cleaner than previously. In order to control several glue nozzles it is advantageous to form a gluing head in accordance with Claim 2. Other advantageous forms of application are shown in connection with the latter example of application.
  • In what follows the invention is illustrated by reference to the accompanying figures which show one kind of glued board press gluing head in accordance with the invention, and its operation.
    • Figure 1
    shows the gluing head seen from above.
    Figure 2
    shows the gluing head seen from the side.
  • The glued board press consists of wood strip handling devices, a gluing head, and the press itself. The accompanying figures only show the wood strip handling devices at the gluing head and the gluing head itself.
  • The wood strip handling devices move one strip at a time past the gluing head 1 with the aid of a guide plate 19 and counter-wheel 10. By means of these the wood strip pushes in the ball valves of the nozzles 8 of the gluing head and glue extrudes onto the surface of the wood strip. As the wood strip passes the gluing head the balls 7 return to the extreme position by means of the pressure and springs 15 close the nozzles 8.
  • The glue distribution device includes a glue reservoir 20, a pump 12, a return circulation channel and its pressure valve 16, operating valve 11 and the glue channel 21 that leads from it to the nozzles 8. In the gluing head 1 the glue is distributed to each nozzle 8 through separate restriction valves 13. By means of these the flow of the glue is suitably regulated. In certain cases a greater flow is wished for in the upper nozzle than in the lower.
  • The device also includes normal sensor components, by means of which it is known when the wood strip is close to the gluing head, on the basis of which the control valve 11 is switched to the feed position. The gluing nozzles 8 open only when the wood strip pushes the ball of the shut-off device 7 inwards. When the wood strip has passed each nozzle the spring in it pushes the ball shut and the nozzle 8 closes. As long as the nozzles 8 are closed, the pump 12 pushes the glue flow through the pressure valve 16 to the glue reservoir 20.
  • Figure 2 shows the principle of the control of the width of the gluing. Wood strips of different widths 9, 14 can be glued by the same gluing head by adjusting its angle. The line formed by the gluing nozzles 8 is turned in such a way that its width corresponds to that of the wood strip. The figure shows the gluing head and the position of the gluing nozzles 8 for two different widths of strip. The width adjustment is stepless from the minimum wood strip width up to the maximum strip width.
  • The adjustment of the angle takes place by loosening the handwheel 6 and by turning the gluing head 1 round the axle pin 17 then locking the gluing head into the new position by means of the handwheel 6. Height adjustment takes place by turning handwheel 3, when the entire gluing head moves vertically along guide 4.
  • The entire gluing head can be removed from the gluing level by means of operating device 5, which is advantageously a pneumatic cylinder. This kind of removal is necessary for example when a so-called dry joint is required to separate sheets of wood strip from one another.

Claims (5)

  1. A solid glued board press, in particular a blockboard press, which includes a glue handling device, two or more gluing nozzles (8), a glue distribution device, wood strip handling devices to transport a wood strip (9) past the nozzles (8) and a press section, the gluing nozzles (8) including shut-off devices (7), which are arranged in such a way that when the wood strip (9) presses against the shut-off device (7) it opens the gluing nozzle (8) and glue flows onto the surface of the wood strip (9), characterised in that the press includes at least two gluing nozzles (8) which are aligned at a gluing level corresponding to the surface of the wood strip (9) and which can be rotated as a unit (1) around an axis perpendicular to the gluing level in order to alter the gluing width.
  2. A solid glued board press in accordance with Claim 1, characterized in that the gluing nozzles (8) are located in a separate gluing head (1) and that the glue distribution device includes a glue reservoir (20), a pump (12), a control valve (11) and glue channels (21) to lead the glue to the gluing nozzles (8) and that each gluing nozzle has its own flow restrictor (13).
  3. A solid glued board press in accordance with Claims 1 or 2 characterized in that it includes a wood strip guide (19) located at essentially the level of the gluing surface, which extends on either side of the gluing nozzle (8) and which press includes a counter wheel (10) located on the opposite side to the gluing nozzles (8), which forces the wood strip to move against the tips of the gluing nozzles (8).
  4. A solid glued board press in accordance with one of Claims 1 - 3, characterized in that the aforementioned shut-off device (7) is formed by a spring- loaded ball valve, in which the ball that closes the gluing nozzle (8) is arranged to protrude slightly from the tip of the gluing nozzle (8) in such a way that when it is pressed it opens the channel of the nozzle (8).
  5. A solid glued board press in accordance with one of Claims 1 - 4, characterized in that the press includes an operating device (5) to move the nozzles (8) to the gluing surface and a distance away from it.
EP90907085A 1989-05-23 1990-05-21 A solid glued board press Expired - Lifetime EP0473631B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI892483A FI81991C (en) 1989-05-23 1989-05-23 MASSIVLIMSKIVEPRESS.
FI892483 1989-05-23
PCT/FI1990/000140 WO1990014168A1 (en) 1989-05-23 1990-05-21 A solid glued board press

Publications (2)

Publication Number Publication Date
EP0473631A1 EP0473631A1 (en) 1992-03-11
EP0473631B1 true EP0473631B1 (en) 1994-10-19

Family

ID=8528486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907085A Expired - Lifetime EP0473631B1 (en) 1989-05-23 1990-05-21 A solid glued board press

Country Status (7)

Country Link
EP (1) EP0473631B1 (en)
AT (1) ATE112983T1 (en)
AU (1) AU5645490A (en)
DE (1) DE69013504T2 (en)
DK (1) DK0473631T3 (en)
FI (1) FI81991C (en)
WO (1) WO1990014168A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7984742B2 (en) 2008-01-21 2011-07-26 Shackelford Jon E Panel clamping assembly
CN101811105B (en) * 2010-04-09 2011-11-16 佛山市科润达机械有限公司 Waxing device for wood board
CN112192683A (en) * 2020-10-06 2021-01-08 李军 Plate gluing and press-fitting device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2318695A (en) * 1939-10-28 1943-05-11 W M Ritter Lumber Company Assembling machinery
CH479380A (en) * 1967-09-19 1969-10-15 Reich Maschf Gmbh Karl Device for gluing two workpieces together
IL31504A0 (en) * 1968-08-07 1969-03-27 Weyerhaeuser Co Adhesive applicator apparatus for box-forming machines
DE2001034A1 (en) * 1970-01-12 1971-07-22 Schwarzwaelder Etuisfabrik Fri Device for applying hot melt adhesives
GB1322861A (en) * 1971-02-11 1973-07-11 Molins Ltd Gluing or gumming devices
DE3012371C2 (en) * 1980-03-29 1983-06-30 Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg Glue applicator
EP0041033B1 (en) * 1980-05-28 1985-07-24 Gaston Laury Apparatus for applying a viscous liquid and in particular an adhesive mixture to a support, and a device provided with such an apparatus
DE3717672A1 (en) * 1987-05-26 1988-12-15 Reich Spezialmaschinen Gmbh METHOD AND DEVICE FOR CONNECTING RESTORED PARTS TO THE FRONT SIDES OF PLATE-SHAPED WORKPIECES

Also Published As

Publication number Publication date
FI81991B (en) 1990-09-28
DK0473631T3 (en) 1995-04-03
FI892483A0 (en) 1989-05-23
WO1990014168A1 (en) 1990-11-29
DE69013504T2 (en) 1995-05-24
FI81991C (en) 1991-01-10
AU5645490A (en) 1990-12-18
ATE112983T1 (en) 1994-11-15
EP0473631A1 (en) 1992-03-11
DE69013504D1 (en) 1994-11-24

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