DE2065099C3

DE2065099C3 - Device for joining the serrated abutting edges of veneer strips coated on one side with a hot melt adhesive. Elimination from: 2019855

Info

Publication number: DE2065099C3
Application number: DE19702065099
Authority: DE
Inventors: Auf Nichtnennung Antrag
Original assignee: FA K HEINZ MOEHRING 4920 LEMGO
Current assignee: FA K HEINZ MOEHRING 4920 LEMGO
Priority date: 1970-04-24
Filing date: 1970-04-24
Publication date: 1974-04-04
Also published as: DE2065099A1; DE2065099B2

Description

50 noch so beweglich, daß er sich selbsttätig auf verschiedene Fumierstreifendicken, Schmelzkleberschichtstärken u.dgl. einstellen kann. Die vordere Einlaufseite des Niederhalteblockes 51 ist mit einer Streifeneinlaufkurve 52 versehen. S50 still so agile that it automatically adjusts itself to various Can adjust veneer strip thicknesses, hot melt adhesive layer thicknesses and the like. The front one The inlet side of the hold-down block 51 is provided with a strip inlet curve 52. S.

Hinter der Niederhaltevorrichtung 47 befinden sich oberhalb des Tisches 44 noch eine Heizeinrichtung 53, eine auf den Tisch absenkbare Andrückwalze 54 und eine Kühleinrichtung 55.Behind the hold-down device 47 there is also a heating device above the table 44 53, a pressure roller 54 that can be lowered onto the table, and a cooling device 55.

Das Zusammenfügen der einzelnen Furnierstreifen geschieht auf folgende Weise: Ein Furnierstreifen wird mit der mit einem Hcißschmelzkleberauftrag beschichteten Seite fcach oben gekehrt von den Förderwalzen 41 durch die Führung 42 hindurchbewegt, was von der Fotozelle 43 registriert wird, die mit einer Zeitverzögerung eine Unterbrechung der Förderung durch die Förderwalzen 41 bewirkt. Der geförderte Furnierstreifen wird bei angehobener Klemmvorrichtung 45 und in seiner oberen Endstellung befindlicher Niederhaltevorrichtung 47 über den ao Tisch 44 gefördert, bis sich seine hintere gezahnte Stoßkante genau unter der Niederhaltevorrichtung 47 befindet. Zu diesem Zeitpunkt wird in der vorerwähnten Weise der Vorschub unterbrochen und die Vorrichtung 46 abwärts bewegt, um den Furnierstreifen in dieser Stellung auf dem Tisch 44 festzuhalten. Dann wird auch die Niederhaltevorrichtung 47 abgesenkt, und zwar mittig auf die Stoßverzahnung des auf dem Tisch festgelegten Furnierstreifens- Darauf fördern die Walzen 41 den nächsten Furnierstreifen durch die Führung 42 und die offene Klemmvorrichtung 45 hindurch und schieben unter dem abgesenkten Niederhalteblock 51 die Zähne der Stoßkanten der beiden Furnierstreifen ineinander. Dabei sorgt die bewegliche Niederhaltevorrichtung 47 dafür, daß die Zähne der beiden Streifen exakt ineinandergreifen und sich nicht etwa übereinanderschieben. Es ist dabei zweckmäßig, die Förderwalzen 41 unter Zwischenschaltung einer fein einstellbaren Rutschkupplung anzutreiben, um hier Überbelastungen zu vermeiden. The joining of the individual veneer strips happens in the following way: A veneer strip is coated with a hot melt adhesive application Page fc turned upwards moved by the conveyor rollers 41 through the guide 42, what is registered by the photocell 43, the interruption of the promotion with a time delay caused by the conveyor rollers 41. The conveyed veneer strip is raised when the Clamping device 45 and hold-down device 47 located in its upper end position over the ao Table 44 is conveyed until its rear toothed abutment edge is exactly below the hold-down device 47 is located. At this time, the feed is interrupted in the aforementioned manner and the Device 46 moved downward to the veneer strip to be held in this position on the table 44. Then the hold-down device 47 is also lowered, in the middle of the butt toothing of the veneer strip laid on the table - on it the rollers 41 convey the next veneer strip through the guide 42 and the open clamping device 45 through and slide the teeth of the abutment edges under the lowered hold-down block 51 of the two veneer strips into each other. The movable hold-down device 47 ensures that the teeth of the two strips interlock exactly and do not slide over one another. It is in this case, it is expedient to move the conveyor rollers 41 with a finely adjustable slip clutch interposed to drive in order to avoid overloading here.

Wenn die nchtungWhen the night

^Glei^^ltlg let, **** beiden Furnierstreiird die Klemmvordamit der in deren ic« auf dem Tisch 44 uiv. Niederhaltevorrichtung : Andrückwalze 54 auf den lcnen Furnierstreifen abgesenkt, die Heizeinrichtung 53 eingeschaltet, die den vorner auf die Furnierstreifen aufgetragenen Schmelzkleber im Bereich der gezahnten Stoßkanten aktiviert. Nach etwa sechs Sekunden Warmlufteinwirkung, die zur Aktivierung des Heißschmelzklebers ausreichen, wird der Tisch 44 mit den darauf festgeklemmten Furnierstreifen langsam ~ " i durchlaufen die zusammengefügnivuwj mit ihrer Stoßstelle und dem dort ^Sliding ^ ^ltlg let, two **** Furnierstreiird the Klemmvordamit the ic in the "iid on the table 44th Hold-down device: Pressure roller 54 lowered onto the inner veneer strip, the heating device 53 switched on, which activates the hot-melt adhesive applied to the veneer strip in the area of the serrated abutting edges. After about six seconds of exposure to warm air, which is sufficient to activate the hot melt adhesive, the table 44 with the veneer strips clamped to it will slowly pass through the joint with their joint and the one there

Schmelzkleber die durch die Andrück-Hot melt adhesive that is

54 gebildete Preßzone, und es kommt zu einem " ·-——:*— durch den Heißr, der N"'^m ansrhJieiienden Durchlaufen54 formed pressing zone, and it comes to a "· -——: * - through the hotr, the N"' ^m ansrhJieiienden pass through

Hat *J Sto^
laufen wird der T*ch
ndrtung ⁴^ und
den
56 ^em Has * J Sto ^
the T * ch will run
ndrtung ⁴ ^ and
the
56 ^em

aus
ses
daß mout
ses
that m

schnell wieder diequickly again the

Wahrenid des
Tisch 44 wiederTrue id des
Table 44 again

^fahrfⁿ· _zweckmäßig ^drive f ⁿ · _appropriate

Es ist zwec™^d» ßIt is zwec ™ ^d »ß

AJjraM^ dieAJjraM ^ the

steUesteUe

^Ά^ 55 durch_{die KlemmvO}r-44 g PP^_{ekroUe 54 wer}. ^ Ά ^ 55 by _{the KlemmvO} r-44 g PP ^ _{ekroUe 54 who} .

_EiltranspOrtwalzen in möglichst schnelles Herllt Furnierbandstückes ^U Sorge tragen. Die-Herausziehen bewirkt, iation unter Berücksichti-Einzelstreiiehlängen sehr Zusammenfügung vorge- _EiltranspO rtwalzen in the fastest possible Herllt veneer tape piece ^ U take care. The pulling-out has the effect of making it very much a combination, taking into account the individual string lengths.

Abtransportes wird der Α zurückge-After removal, the Α will be returned

während des vorerwähnten _chaffene Verbindungs-during the aforementioned connection _chaffene

⁵ _Aufwickel_Q des ⁵ _rewind l _Q des

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

ι 2 th tables clamped and then the tables counter claims: would move each other. In particular, however, this known device would only be a very small one

1. Device for joining together the performance achievable.

The invention is therefore based on the object of glue-coated veneer strips coated with hot melt adhesive, a device for joining the p.ezahn in which the veneer strips can be clamped to a joint edge from one side with a table that can be moved to and fro on one side To create veneer strips, which are characterized in that on the hot melt adhesive applied beforehand by activating the previously applied hot front and the rear part of the table (44), a particularly secure connection is made each time a veneer strip clamping device (45 of a large number of successively supplied fur or 46) is arranged and that allows kidney strips to form a tape between these.
Clamping devices over the table an on- The solution to this problem is after the upward and downward movable hold-down device invention that on the front and the rear (47), a switchable Heizvorrich- »5 ren part of the table one Veneer strips clamping (53), an up and down movable streaking device is arranged and that between these fenandriickvorrichtung (54) and a Kühivor- clamping devices above the table an up and down direction (55) one behind the other fixedly mounted downwardly movable hold-down device, a on, and switchable heating device, an up and down

2. Device according to claim 1, characterized in that as well as downwardly movable strip pressing device indicates that the hold-down device has a cooling device one behind the other in a stationary manner (47) a plunger (48) and a vertical are brought.

There is a device for producing a

which hold-down shoe (51) has. endless veneer strip known in which the blunt

3. Device according to claim 2, characterized in that they abut one another or overlap one another indicates that the hold-down shoe (51) is attached to the end parts of the individual veneers lying in rows the front clamping device (45) are connected to one another by adhesive strips turned side a strip inlet curve (53) to be up. Pressing the adhesive strips against the shows. Veneer strips are done by means of one over one

30 endless conveyor belt can be raised and lowered (see German Auslegeschrift 1 052 667).

However, this known device is not suitable for using the toothed abutting edges from one side veneer strips coated with a hot-melt adhesive.

The invention relates to a device for the In a preferred embodiment, the

Join the toothed abutment edges of a hold-down device on one side, a ram and a vertical direction of veneer coated with a hotmelt adhesive, which can be moved to a limited extent with the latter, in which the veneer strips rest on a hold-down shoe connected to it.
and movable table can be clamped. 40 In the drawing is an embodiment of the

It is known to machine the subject of the invention shown on workpiece edges. Fs shows
veneer strips to be applied nell on one side with F i g. 1 is a schematic side view of a fur-

to coat them with a hot melt adhesive and to glue them together
Veneer strips or rolls with one another to FIG. 2, a section along the line H-II in FIG. 1.

associate. The ends of the strips of veneer are to be connected with their serrated edges either sharpened or serrated and with each other and on one side with a hot melt adhesive glued (see German utility model), coated veneer strips are used with the be-1 969 776). layered side turned upwards over conveyor roller

In a device for joining zen 41 and a strip guide 42, in which a photo is arranged on their end faces of finger-jointed workpieces made of 50 cell 43, a table 44 that can be moved back and forth in the feed direction of wood, such as planks or squared timbers, the veneer strips To clamp the workpieces, which are provided at the front and rear ends with dematerialized application, on separate tables that are simultaneously designed as veneer strip guides, and to clamp the workpiece tables, which can be moved up and down by compressed air after the workpieces have been clamped to each other 55 clamping devices 45 and 46 are arranged,
to move, so that the with the binder- Above the table 44 is also an up and down-

Order-provided front ends of the workpieces, downwardly movable hold-down device 47 arranged one to the other are pressed (cf. German interpretation, which according to FIG 1 212 282). Ren plunger 48 has, but not completely

However, this known device is for the purpose of attaching the veneer strips lying on the table 44 joining the serrated abutting edges of fur- lowered, but in a position slightly above this veneer strips, which are known to only have a thickness of approximately veneer strips. In the plunger 48 are 1 mm, cannot be used because once the pin 49 attached, which is in elongated holes 50 of the actual a binding agent on the very thin butt borrowed Niedcrhalteblockes 51 intervene, which surfaces of these veneers is practically impossible and 65 when lowering the plunger 48 by its own accord the thin and therefore sensitive weight completely on the table 44 or the abutting edges on it the veneer strips are sure to lower into veneer strips that can be found. This Niederhal break would go if the veneer is on separate block 51 due to the arrangement of the elongated holes