EP0167953B1 - Procédé et appareil pour produire des couches intermédiaires - Google Patents

Procédé et appareil pour produire des couches intermédiaires Download PDF

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Publication number
EP0167953B1
EP0167953B1 EP85108126A EP85108126A EP0167953B1 EP 0167953 B1 EP0167953 B1 EP 0167953B1 EP 85108126 A EP85108126 A EP 85108126A EP 85108126 A EP85108126 A EP 85108126A EP 0167953 B1 EP0167953 B1 EP 0167953B1
Authority
EP
European Patent Office
Prior art keywords
strips
belt
arrangement
group
glue
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
EP85108126A
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German (de)
English (en)
Other versions
EP0167953A1 (fr
Inventor
Hans Dipl.-Ing. Enzinger
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.)
Gebr Schweiger
Original Assignee
Gebr Schweiger
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 Gebr Schweiger filed Critical Gebr Schweiger
Priority to AT85108126T priority Critical patent/ATE37682T1/de
Publication of EP0167953A1 publication Critical patent/EP0167953A1/fr
Application granted granted Critical
Publication of EP0167953B1 publication Critical patent/EP0167953B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0026—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally
    • B27M3/0053—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally using glue

Definitions

  • the invention relates to a method (corresponding to the preamble of claim 1) and a device (corresponding to the preamble of claim 2) for the production of middle layers.
  • the middle layer is the wood layer of blockboard between the barrier veneers.
  • the middle layer usually consists of individual strips, preferably connected by glue. It ensures the flat shape of the finished blockboard.
  • Middle layers are usually produced in middle layer gluing machines.
  • the strips are placed individually on a front table and shot into the machine at high speed by a chain belt.
  • a thin glue thread is applied to the strips.
  • the machine joins the individual strips prepared in this way close together.
  • the fully formed area of the strip of carpet then enters a heated pressure and glue zone.
  • the main disadvantage of the known method lies in the power limitation.
  • An increase in performance can only be achieved by increasing the speed at which the individual strips are shot into the gluing machine.
  • the kinetic energy of the bars increases, which must be destroyed when the bars impact a stop.
  • the high kinetic energy entails the risk of damage to the strips and the resulting malfunctions.
  • Another disadvantage of the known method is that generally only one operator can work on the machine, sorting and presenting the individual strips to be shot. For this reason, there are strict limits to an increase in performance.
  • a method is also known (US-A 2572772) in which a group of plywood strips lying directly next to one another are passed between two glue rollers and are thereby provided with glue on their exposed outer sides. This strip group is then attached to an outside of a stack of strips, from the top of which the strips are removed in layers and fed to a press. The handling of this process is cumbersome overall and does not allow high production speeds.
  • the invention is based on the object of further developing a method of the type required in the preamble of claim 1 and a device according to the preamble of claim 2 such that a substantial increase in performance is achieved - while maintaining a reliable, trouble-free operating sequence.
  • the prerequisite for the solution according to the invention is that the group of the strips supplied simultaneously and in parallel is supplied with glue in a faultless and uniform manner.
  • the strips fed in parallel are held at a lateral distance, the glue being added in the space formed by the lateral spacing of adjacent strips.
  • the group of strips fed in at the same time is then added to the existing carpet of carpets, while eliminating the gaps between these strips.
  • the device according to the invention for the production of middle layers shown schematically in top view in FIGS. 1 and 1, essentially contains a conveyor device 1 for feeding in each case a group of strips in a parallel position with a lateral spacing, a device 2 for adding glue into the space between adjacent strips, a device 3 for attaching a group of parallel strips to the existing strip of carpet as well as a heated pressure and gluing zone 4.
  • the sorting stations 7 are equipped on both sides of an operator 15 with a saw 16, 17 each. As can be seen in FIG. 2, the web belt 8 lies somewhat lower than the feed belt 5. Above the web belt 8 there is a buffer belt 18 which is guided into the buffer zone 11, which in FIG. 1 b is only schematic with a single operator 19 is shown. In the area of the sorting stations 7 there is also a magazine 20 for unsorted goods, as well as a conveyor belt 21 for the removal of the waste.
  • the webs 8a of the web belt 8 run parallel to the conveying direction. Their mutual distance is somewhat larger than the width of the strips 10 (if these are placed on the web strip 8 in the position provided for the gluing, rotated by 90 ° relative to the cut in the multi-blade saw 6).
  • the stationary guide system 9 extends from the discharge-side end of the web belt 8 through the synchronous feed device 13 to the glue addition device 2. It contains a number of guide belts 22 (see FIG. 4) arranged in parallel and at a lateral spacing, which are arranged at certain intervals via holding belts 23 are suspended on fixed brackets 24 in such a way that they can be moved to a limited extent transversely to the conveying direction (double arrow 25, FIG. 4).
  • the strips 10 run between the guide belts 22 and are transported by the conveyor belt 12 running closely below the guide system 9.
  • the transition of the strips 10 from the discharge-side end of the web belt 8 (deflection axis 26) to the adjoining conveyor belt 12 (inlet-side deflection axis 27) is shown in FIG.
  • the guide bands 22 are provided with a rounded widening 22a at their inlet end. This prevents strips from blocking when they hit guide belts 22.
  • the synchronous feed device 13 contains a number of paired upper and lower rollers 28, 29, between which the strips 10 pass.
  • the upper rollers 28 are subdivided according to the strip width (cf. FIG. 6) and contain a knurled outer steel ring 28a which is arranged on a rubber ring 28b.
  • the lower rollers 29 are formed continuously, provided with grooves and appropriately knurled on the circumference.
  • the guide bands 22 are provided in the spaces thus formed.
  • the upper rollers 28 can be pressed in the direction of the lower rollers 29 by a hydraulic or pneumatic actuation device (not shown), so that the strips 10 are transported synchronously when the lower and / or upper rollers are driven.
  • a monitoring device 30, which is only indicated schematically, is arranged in front of the synchronous feed device 13. It determines whether there is a ledge 10 in each ledge channel (between adjacent guide bands 22) and whether no ledge channel is occupied twice by ledges.
  • the device for adding glue in the space between adjacent strips is shown in detail in FIGS. 7 to 10.
  • the device 2 contains a nozzle system 31 (FIG. 10) for each ledge channel, the nozzle systems 31 assigned to the adjacent ledge channels being offset relative to one another in the conveying direction (cf. FIG. 1b).
  • the nozzle system 31 is detachably connected to the end of the associated guide band 22 via a web part 32.
  • a bushing 34 is fastened to the guide band 22 via a holder 33, through which a bolt 35 connected to the web part 32 engages.
  • the connection is made via a nut 36.
  • the nozzle system 31 (see FIG. 10) contains a hydraulic or pneumatic actuating cylinder 37, the piston rod 38 of which is connected to a nozzle needle 39, which is brought in its lowered position interrupts the connection between a glue supply opening 40 and a nozzle channel 41.
  • the nozzle channel 41 opens out on a side wall of the web part 32 (cf. FIG. 9) and feeds glue (in the direction of the arrow 42) to the adjacent one side surface 10a of the strip 10. In this way, the strips running past the nozzle systems 31 receive a glue thread 43 schematically indicated in FIG.
  • the insertion space 14 of the heated pressure and gluing zone 4 is intended for receiving a group of strips 10 fed in parallel and simultaneously.
  • This insertion space 14 is delimited at the end by an adjustable end stop 44.
  • An I ⁇ app saw 45 is arranged in the area of the entry side.
  • a slide ./1,3 is provided which is adjustable in the direction of arrow 48 by a number of only schematically indicated hydraulic or pneumatic actuating cylinders 47 and thus pushes the strips introduced into the insertion space 14 transversely to their feed direction onto the existing carpet of strips .
  • the insertion space 14 is delimited by a stop bar 49 which can be raised and lowered.
  • the heated printing and gluing zone 4 contains bar-shaped heating registers 54, 55 on the upper and lower sides, of which the upper heating registers 54 can be adjusted in height to the respective strip thickness.
  • springs not shown
  • a uniform, adjustable pressure is exerted on the middle layer 52 of the blockboard 52 which arises in the pressure and gluing zone 4 and which moves further in the direction of the arrow 53 when a further strip group is inserted.
  • the antechamber 14 of the printing and gluing zone 4 is delimited on the upper side by a profile 50 and on the underside by a table 51.
  • the middle layer is thus produced using the method according to the invention as follows:
  • the dried board goods are cut into strips in the multi-blade saw 6, which then run on the feeder belt 5 to the sorting stations 7.
  • the operators 15 remove the strips from the feeder belt 5, examine them and, if necessary, cut out errors from the strips.
  • the good strips are then placed on the web strip 8, in such a way (generally flat) that the cut surfaces are above or below.
  • the operator can place excess sorted bars on the buffer belt 18. On the other hand, if there is too much unsorted goods, this is first stored in the magazine 20.
  • the strips 10 pass from the web belt 8 to the smooth conveyor belt 12, which runs under the stationary guide system 9.
  • the conveyor belt 12 transports the strips through the buffer zone 11, at the end of which at least one operator 19 is arranged. It ensures that all strip channels (between the parallel guide bands 12) are filled with strips. If necessary, it takes sorted strips from the buffer belt 18 and thereby fills an empty strip channel.
  • the monitoring device 30 monitors the correct filling of all groin channels. If the monitoring device responds when an irregularity is detected, the synchronous feed device 13 is stopped immediately and the glue addition is interrupted.
  • both the spacing of the webs 8a of the web band 8 and the spacing of the guide bands 22 are selected to be somewhat larger than the width of the strips 10 in order to take account of deviations of the strips from the straight position (ie warpage of the strips) .
  • the strips 10 then run through the synchronous feed device 13.
  • the elastic design of the upper rollers 28 compensates for any differences in thickness of the strips.
  • the strips After passing through the synchronous feed device 13, the strips pass through the device 2 for adding glue, and are kept in a parallel position and at a lateral distance up to this device 2 by the guide belts 22 of the stationary guide system 9.
  • the strips provided with glue reach the insertion space 14 of the pressure and gluing zone 4.
  • the length of the inlet is determined by the adjustable end stop 44. Shortly before the desired length is reached, when the end stop 44 is touched for the first time, the feed (by the synchronous feed device 13) is reduced to the creeper gear. When the exact end position is reached, the feed is switched off.
  • the upper profile 50 of the insertion space 14 can be raised and lowered. When the strips 10 run into the insertion space 14, the upper profile 50 is in the raised position. After switching off the bar feed, the upper profile 50 is lowered and now presses the bars 10 to the same height. Then the bar band is cut to the desired length by the chop saw 45.
  • the strip of strips is pushed into the printing and gluing zone 4 by the slide 46, the strip of strips being pressed onto the strip of carpet already located in this printing and gluing zone 4 and glued to it.
  • the middle layer 52 located in the printing and gluing zone 4 is pushed further by the strip width of the strip.
  • the endless middle layer is cut into individual plates.
  • Fig. 12 illustrates one of the inventions Possibility given to the method according to the invention to also utilize strips 56 with defects on one side (for example with a tree edge). These strips 56 are inserted into one of the two outer strip channels.
  • a re-milling device 57 is arranged adjacent to one or both outer ledge channels, which mills off the defective edge of the ledge 56 during the feed movement.
  • faulty strips can also be used to a certain extent in the method according to the invention by cutting these strips in the outer strip channels to a reduced width compared to the strips in the other strip channels. The wood utilization is significantly improved in this way.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Claims (9)

1. Procédé de production de couches intérieures,suivant lequel des lattes de bois (10) sont assemblées en un tapis en recevant un dépôt de colle, puis sont reliées les unes aux autres dans une zone chauffée (4) de compression et de fixation de la colle, caractérisé par les particularités suivantes:
a) des lattes parallèles (10) et placées latéralement à distance les unes des autres arrivent simultanément en formant des groupes successifs;
b) le dépôt de colle s'effectue dans l'intervalle formé par la distance séparant latéralement les lattes voisines;
c) les lattes (10) arrivant simultanément en formant un groupe sont réunis ensemble au tapis déjà existant.
2. Dispositif de réalisation de couches intérieures, comprenant:
a) un dispositif de transport (1) destiné à amener des lattes (10),
b) un dispositif (2) de dépôt de colle,
c) un dispositif (3) de réunion des lattes (10) au tapis déjà existant,
d) une zone chauffée (4) de compression et de fixation de la colle, caractérisé par les particularités suivantes:
e) le dispositif de transport (1) destiné à amener des groupes successifs de lattes (10) placées parallèlement et à distance latérale les unes des autres comprend:
e1) une courroie d'alimentation menant au poste de triage (7),
e2) une courroie (8) alimentée par les postes de triage (7) et comportant des nervures (8a) qui sont parallèles et placées à distance latérale les unes des autres et qui sont destinées à orienter et à maintenir à distance les lattes (10),
eg) un système fixe de guidage (9) faisant suite à la courroie nervurée (8) et se prolongeant jusqu'au dispositif de dépôt de colle (2), ce système maintenant les lattes (10) parallèlement et à distance latéralement les unes des autres,
e4) une courroie (12) faisant suite à la courroie nervurée (8) et transportant les lattes (10) dans une zone d'égalisation (11),
es) un dispositif d'avancement (13) faisant suite à la courroie transporteuse (12) et destiné à introduire en synchronisme les groupes successifs de lattes (10) dans la chambre d'entrée (14) de la zone (4) de compression et de fixation de la colle, le système fixe de guidage (9) se prolongeant tout au long du dispositif (13) d'avancement en
synchronisme;
f) le dispositif (2) de dépôt de colle comprend, pour chaque canal occupé par une latte, un système de buse (31) commandé par un pointeau (39), les systèmes de buse (31) affectés aux canaux voisins étant décalés les uns par rapport aux autres dans la direction de transport;
g) une chambre d'entrée (14) destinée à recep- tionner les groupes successifs de lattes (10) et faisant partie de la zone (4) de compression et de fixation de la colle est délimitée dans le sens d'arrivée des lattes par une butée réglable (44) de fin de course;
h) le dispositif (3) de réunion de chaque groupe de lattes parallèles (10) au tapis déjà existant comprend un poussoir (46) mobile transversalement par rapport à la direction d'arrivée des lattes.
3. Dispositif selon la revendication 2, caractérisé en ce que le système fixe de guidage (9) comprend plusieurs rubans parallèles de guidage (22) disposés latéralement à distance les uns des autres, destinés à orienter et à maintenir à distance les lattes (10) et suspendus à des supports fixes (24) de manière à être faiblement mobiles perpendiculairement à la direction de transport.
4. Dispositif selon la revendication 3, caractérisé en ce que les rubans de guidage (22) comportent à leur extrémité d'entrée un élargissement (22a) de préférence arrondi.
5. Dispositif selon la revendication 3, caractérisé en ce que le dispositif d'avancement en synchronisme (13) comprend plusieurs rouleaux (28, 29) coopérant deux à deux et dont les rouleaux supérieurs (28) de préférence soumis à la force de ressorts sont subdivisés conformément à la largeur des lattes et prénétrent dans l'intervalle séparant les rubans voisins de guidage (22).
6. Dispositif selon la revendication 3, caractérisé en ce que les systèmes de buse (31) sont disposés à l'extrémité des rubans de guidage (22) et sont de préférence reliés de manière amovible à ces derniers.
7. Dispositif selon la revendication 2, caractérisé en ce qu'il comprend une courroie d'égalisation (18) parallèle à la courroie nervurée (8) et à la courroie transporteuse (12) faisant suite à cette dernière.
8. Dispositif selon la revendication 2, caractérisé en ce qu'un dispositif de fraisage (57) est prévu de préférence dans la région du dispositif d'avancement en synchronisme (13), au voisinage d'au moins l'un des deux canaux extérieurs occupés par des lattes, ce dispositif découpant les lattes (56) comportant des défauts du côté extérieur et situées dans le canal extérieur, cette découpe réduisant la largeur des lattes par rapport à celles (10) se trouvant dans les autres canaux.
EP85108126A 1984-07-13 1985-07-01 Procédé et appareil pour produire des couches intermédiaires Expired EP0167953B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108126T ATE37682T1 (de) 1984-07-13 1985-07-01 Verfahren und vorrichtung zur herstellung von mittellagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3425893 1984-07-13
DE19843425893 DE3425893A1 (de) 1984-07-13 1984-07-13 Verfahren und vorrichtung zur herstellung von mittellagen

Publications (2)

Publication Number Publication Date
EP0167953A1 EP0167953A1 (fr) 1986-01-15
EP0167953B1 true EP0167953B1 (fr) 1988-10-05

Family

ID=6240594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108126A Expired EP0167953B1 (fr) 1984-07-13 1985-07-01 Procédé et appareil pour produire des couches intermédiaires

Country Status (3)

Country Link
EP (1) EP0167953B1 (fr)
AT (1) ATE37682T1 (fr)
DE (2) DE3425893A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8514529U1 (de) * 1985-05-14 1985-08-08 Jörg Torwegge GmbH, 4972 Löhne Mittellagenverleimmaschine
AT401747B (de) * 1994-11-14 1996-11-25 Fendt Hermann Tafelelement aus massivholz und verfahren zu seiner herstellung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572772A (en) * 1950-04-25 1951-10-23 Per F Skoog Method of producing composite boards

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617456A (en) * 1947-09-06 1952-11-11 Laminated Lumber Products Inc Lumber gluing machine
US2577772A (en) * 1947-10-03 1951-12-11 Kennedy Walter Radiant gas burner, including air filter and venturi mixer
DE1932385U (de) * 1964-04-06 1966-02-10 Roman Schart Vorrichtung zum herstellen von leistenmittellagen fuer tischlerplatten.
DE1528120A1 (de) * 1966-12-01 1970-10-01 Robert Hildebrand Verfahren und Vorrichtung zum Herstellen einer Mittellage fuer eine Tischlerplatte

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572772A (en) * 1950-04-25 1951-10-23 Per F Skoog Method of producing composite boards

Also Published As

Publication number Publication date
EP0167953A1 (fr) 1986-01-15
ATE37682T1 (de) 1988-10-15
DE3565378D1 (en) 1988-11-10
DE3425893A1 (de) 1986-01-23

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