EP0885100A1 - Loading device for a plate press - Google Patents

Loading device for a plate press

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Publication number
EP0885100A1
EP0885100A1 EP97951060A EP97951060A EP0885100A1 EP 0885100 A1 EP0885100 A1 EP 0885100A1 EP 97951060 A EP97951060 A EP 97951060A EP 97951060 A EP97951060 A EP 97951060A EP 0885100 A1 EP0885100 A1 EP 0885100A1
Authority
EP
European Patent Office
Prior art keywords
loading
workpiece
press
machined
conveyor belts
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.)
Granted
Application number
EP97951060A
Other languages
German (de)
French (fr)
Other versions
EP0885100B1 (en
Inventor
Hans Bohn
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.)
Robert Buerkle GmbH
Original Assignee
Robert Buerkle GmbH
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 Robert Buerkle GmbH filed Critical Robert Buerkle GmbH
Publication of EP0885100A1 publication Critical patent/EP0885100A1/en
Application granted granted Critical
Publication of EP0885100B1 publication Critical patent/EP0885100B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B27N3/20—Moulding or pressing characterised by using platen-presses
    • B27N3/22—Charging or discharging

Definitions

  • the invention relates to the field of processing workpieces in a plate press, in particular the loading of this plate press for the production of tempered chipboard.
  • This is of particular interest as to how such a workpiece, for example the chipboard to be processed, is deposited in the press since the transfer from the loading device to the press must be such that the workpiece to be machined occupies a position that is as precisely defined as possible on the press.
  • this is achieved in that the workpiece to be machined is not placed over the entire surface of the press, but first with one edge and then with the other edge, in order to avoid air cushion-like effects which lead to blurring of the workpiece on the press lead and thus worsen the exact positioning mentioned or make it impossible.
  • DE 28 47 273 C3 describes a generic loading device in which clamping strips are provided as holding devices, which are opened and pulled outwards in the storage position of the workpiece to be processed, so that the workpiece is pushed down into the press (usually on the lower heating plate) can fall.
  • the friction occurring when the workpiece is put down from these open clamping strips is to be prevented or at least minimized by providing additional depositing rollers on which the workpiece to be machined is placed when the loading bars are moved apart.
  • Another system (DE 35 03 156 Cl) provides for the omission of additional holding devices, such as, for example, terminal strips, in which case the workpiece to be machined lies directly on the loading bars, which are provided with holes through which during the transport process the workpiece to be machined is sucked in and via which an air flow is blown upwards towards the workpiece during the depositing process, so that the workpiece floats on an air cushion.
  • additional holding devices such as, for example, terminal strips
  • the loading device consists of belt transports which are moved into the press space, so that the workpiece to be processed is carried on the longitudinal edges by the belts of this belt transport system and is conveyed into the press.
  • the two conveyor belts are pulled outwards so that the workpiece can fall down onto the lower heating plate.
  • rollers are swung up on the inside of these conveyors, so that the friction between belt transport and workpiece is reduced.
  • this system is very complex, since large masses (conveying devices) have to be moved quickly, which requires a correspondingly large acceleration with corresponding effort and suitable devices.
  • the loading devices described have in common that despite the additional devices mentioned, it is not or not sufficiently ensured that no sliding friction occurs between the workpiece and the specific system used for conveying and depositing, which engages under and supports the workpiece. With the three systems mentioned at the beginning, it is necessary that the workpiece is always placed on one side, so that no air cushions form on which the workpiece can blur. In all known systems, this has the consequence that the loading spars have to be moved outwards one after the other when the workpiece is placed down, ie the second loading spar can only then its release movement begins when the first loading spar has already left the area of the workpiece and the corresponding edge has reached the press.
  • the invention is therefore based on the object of developing the generic loading device so that no sliding friction occurs when the workpiece is placed, for example a layer package on the heating plate, furthermore this loading device is to be constructed mechanically simple.
  • these conveyor belts are mechanically connected to the To couple the movement of the loading spars in such a way that the peripheral speed of the two deflecting rollers which carry the conveyor belt is selected such that when the loading spars move, the upper run of the conveyor belts moves in the opposite direction at the same speed, so that consequently the absolute speed of a point on the conveyor belt and thus the relative speed, based on the stationary workpiece, is zero.
  • the solution according to the invention makes it possible, in particular, to control the two loading bars in such a way that when the workpiece is placed on the lower heating plate of the press, the tilting-like laying movement of the workpiece on the press which is necessary for the reasons explained at the beginning is minimized laterally, so that the desired full-surface contact of the underside of the workpiece with the heating plate is established in the shortest possible time.
  • FIG. 2 shows a partial view of a corner area of the loading device according to FIG. 1,
  • Fig. 4 is a vertical section through the press with the loading device according to the invention shortly before placing the workpiece on the lower heating plate and
  • Fig. 5 is a vertical section corresponding to Fig. 4, when entering the workpiece in the press. Description of the preferred embodiment:
  • the loading device according to the invention is used to load a press 10 (Fig. 4.5), of which only the lower part is shown with the lower heating plate 1.
  • a press 10 Fig. 4.5
  • the workpiece 8 is to be conveyed from its position outside the press and to be deposited there as precisely as possible.
  • a holding frame 2 is initially provided, which in its position moved into the press extends to both sides of the lower heating plate 1 and on which the loading device with its individual components is held.
  • the essential component of this loading device are two loading bars 3A, 3B which can be displaced parallel to the longitudinal sides of the holding frame 2.
  • the loading spar 3A is shown extended, i.e. it does not protrude above the lower heating plate 1
  • the loading spar 3B is shown retracted, i.e. it protrudes over the lower heating plate 1.
  • To guide the loading bars 3A, 3B they are connected in a known manner to the holding frame 2 by two tubes or rods R, which are mounted in corresponding receptacles S of the holding frame.
  • the rods R of the loading spars 3A, 3B carry, on their end pointing towards the inside of the press, holding devices on which the workpiece 8 to be machined rests when both loading spars are in the retracted position (FIG. 5), in which they also hold the workpiece 8 can be transported from a loading station into the press 10.
  • the holding devices consist of several conveyor belts 4, the upper run of which is guided over the loading bars 3A, 3B.
  • a deflection roller 4A is provided on the outwardly facing narrow side of the loading bars 3A, 3B, on the inwardly facing end face of the loading bars 3A, 3B the conveyor belts 4 are guided via a common drive shaft 5.
  • a rack 6A, 6B is mounted on the front end 2A, which meshes with a gear 7A, 7B at the end of the drive shaft 5A, 5B.
  • the function of this drive is illustrated in Fig.
  • the diameter of the gear 7 is chosen so that the conveyor belts 4 promote against the movement of the loading spars 2 at the same speed as the loading spars move outwards, so that the movement of the loading spars 3A, 3B to no friction between the upper run of the Conveyor belts 4 and the underside of the workpiece 8 leads, regardless of the speed or direction at which the loading bars move.
  • a typical sequence of movements of the loading device according to the invention is as follows:
  • the holding frame 2 is located outside the press in a loading station, where the loading bars 3A, 3B move under the workpiece in order to be taken over by other conveying devices, for example a roller conveyor.
  • the holding frame 2 is retracted into the press 10 until it assumes the desired position in which the workpiece 8 is located above the lower heating plate 1, held by the retracted loading bars 3A, 3B, this position is shown in FIG. 5.
  • the depositing of the workpiece 8 on the lower heating plate 1 begins in that the two loading bars 3A, 3B are extended with a slight time delay (large arrows in FIG. 4), the upper run according to the above-described forced coupling of the drive of the conveyor belts 4 this conveyor belts moved in the opposite direction (small arrows), at the same speed at which the loading spars are extended, so that no relative movement and therefore no friction can form between the upper run of the conveyor belts on the one hand and the underside of the workpiece 8 .
  • the loading spar 3B is slightly ahead of the loading spar 3A, so that the right longitudinal side of the workpiece 8 in FIG.
  • the rack and pinion combination described is preferred for the mechanical forced coupling of the conveyor belts 4 with their associated loading bars 3A, 3B, but it is equally possible to achieve this sequence by means of a chain with sprockets or by means of belts and pulleys.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Press Drives And Press Lines (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Advancing Webs (AREA)

Abstract

PCT No. PCT/DE97/02628 Sec. 371 Date Jul. 13, 1998 Sec. 102(e) Date Jul. 13, 1998 PCT Filed Nov. 11, 1997 PCT Pub. No. WO98/22268 PCT Pub. Date May 28, 1998A loading device for a plate press, composed of two loading supports which can be displaced perpendicular to a conveyance direction. Each loading support has at least one holding device with a conveyor belt which travels in the direction of conveyance. A workpiece to be processed is placed on the upper reach of the conveyor belt and is deposited by the conveyor belt in or on the press. The conveyor belt is moved in such a way that the relative speed of its upper reach in relation to a workpiece being conveyed is equal to zero for all states of movement of the assigned loading supports. As a result, no frictional movement occurs between the conveyor belt and workpieces being carried thereby.

Description

Beschreibung description
Beschickungsvorrichtung für eine Plattenpresse Gebiet der ErfindungPlate press feeder Field of the Invention
Die Erfindung betrifft das Gebiet der Verarbeitung von Werkstücken in einer Plattenpresse, insbesondere der Beschickung dieser Plattenpresse zur Herstellung von vergüteten Spanplatten- Hierbei interessiert besonders, wie die Ablegung eines solchen Werkstückes, also beispielsweise der zu bearbeitenden Spanplatte, in der Presse erfolgt, da die Übergabe von der Beschickungsvorrichtung zur Presse so erfolgen muß, daß das zu bearbeitende Werkstück auf der Presse eine möglichst genau definierte Position einnimmt. In der Regel wird dies dadurch erreicht, daß das zu bearbeitende Werkstück nicht vollflä- chig auf die Presse aufgesetzt wird, sondern zuerst mit einer Kante und dann mit der anderen Kante, um luftpolsterähnliche Effekte zu vermeiden, die zu einem Verschwimmen des Werkstückes auf der Presse führen und somit die erwähnte exakte Positionierung verschlechtern bzw. unmöglich machen.The invention relates to the field of processing workpieces in a plate press, in particular the loading of this plate press for the production of tempered chipboard. This is of particular interest as to how such a workpiece, for example the chipboard to be processed, is deposited in the press since the transfer from the loading device to the press must be such that the workpiece to be machined occupies a position that is as precisely defined as possible on the press. As a rule, this is achieved in that the workpiece to be machined is not placed over the entire surface of the press, but first with one edge and then with the other edge, in order to avoid air cushion-like effects which lead to blurring of the workpiece on the press lead and thus worsen the exact positioning mentioned or make it impossible.
Um dies zu erreichen, sind verschiedene Systeme bekannt.Various systems are known to achieve this.
Stand der TechnikState of the art
In der DE 28 47 273 C3 ist eine gattungsgemäße Beschickungsvorrichtung beschrieben, bei der als Haltevorrichtungen Klemmleisten vorgesehen sind, die in der Ablegeposition des zu verarbeitenden Werkstückes geöffnet und nach außen gezogen werden, so daß das Werkstück nach unten in die Presse (in der Regel auf die untere Heizplatte) fallen kann. Die beim Ablegen des Werkstückes aus diesen geöffneten Klemmleisten auftretende Reibung soll dadurch verhindert oder zumindest minimiert werden, indem zusätzliche Ablegerollen vorgesehen sind, auf die das zu bearbeitende Werkstück beim Auseinanderfahren der Beschickungsholme abgelegt wird. Ein weiteres System (DE 35 03 156 Cl) sieht vor, auf zusätzliche Halteeinrichtungen, wie z.B. Klemmleisten, zu verzichten, hierbei liegt das zu bearbeitende Werkstück unmittelbar auf den Beschik- kungsholmen auf, die mit Löchern versehen .sind, durch die während des Transportvorganges das zu bearbeitende Werkstück angesaugt wird und über die beim Ablegevorgang ein Luftstrom nach oben zum Werkstück geblasen wird, so daß das Werkstück auf einem Luftpolster schwimmt.DE 28 47 273 C3 describes a generic loading device in which clamping strips are provided as holding devices, which are opened and pulled outwards in the storage position of the workpiece to be processed, so that the workpiece is pushed down into the press (usually on the lower heating plate) can fall. The friction occurring when the workpiece is put down from these open clamping strips is to be prevented or at least minimized by providing additional depositing rollers on which the workpiece to be machined is placed when the loading bars are moved apart. Another system (DE 35 03 156 Cl) provides for the omission of additional holding devices, such as, for example, terminal strips, in which case the workpiece to be machined lies directly on the loading bars, which are provided with holes through which during the transport process the workpiece to be machined is sucked in and via which an air flow is blown upwards towards the workpiece during the depositing process, so that the workpiece floats on an air cushion.
Aus der DE 39 14 866 ist ein ähnliches System bekannt, bei dem die Beschickungsvorrichtung aus Riementransporten besteht, die in den Preßraum eingefahren werden, so daß das zu verarbeitende Werkstück an den Längsrändern von den Riemen dieses Riementransportsystems getragen wird und in die Presse gefördert wird. Beim Ablegen des Werkstückes in der Presse werden die beiden Transportbänder nach außen gezogen, so daß das Werkstück nach unten auf die untere Heizplatte fallen kann. Um zu verhindern, daß das Werkstück vom linken oder vom rechten Transportband durch unkontrollierte Reibung nach der einen oder anderen Seite verschoben wird, werden an der Innenseite dieser Fördereinrichtungen Rollen hochgeschwenkt, damit die Reibung zwischen Riementransport und Werkstück vermindert wird. Dieses System ist allerdings sehr aufwendig, da große Massen (Fördereinrichtungen) schnell verschoben werden müssen, was eine entsprechende große Beschleunigung mit entsprechendem Kraftaufwand und dafür geeignete Einrichtungen erfordert.From DE 39 14 866 a similar system is known, in which the loading device consists of belt transports which are moved into the press space, so that the workpiece to be processed is carried on the longitudinal edges by the belts of this belt transport system and is conveyed into the press. When the workpiece is placed in the press, the two conveyor belts are pulled outwards so that the workpiece can fall down onto the lower heating plate. In order to prevent the workpiece from being shifted to the one or the other side by uncontrolled friction from the left or from the right conveyor belt, rollers are swung up on the inside of these conveyors, so that the friction between belt transport and workpiece is reduced. However, this system is very complex, since large masses (conveying devices) have to be moved quickly, which requires a correspondingly large acceleration with corresponding effort and suitable devices.
Den beschriebenen Beschickungsvorrichtungen ist gemeinsam, daß trotz der erwähnten zusätzlichen Einrichtungen nicht oder nicht ausreichend gewährleistet ist, daß keine gleitende Reibung zwischen dem Werkstück und dem jeweils zur Förderung und zum Ablegen benutzten spezifischen System entsteht, das das Werkstück untergreift und dieses trägt. Bei den drei eingangs erwähnten Systemen ist es erforderlich, daß das Werkstück immer einseitig abgelegt wird, damit sich keine Luftpolster bilden, auf denen das Werkstück verschwimmen kann. Dies hat bei allen bekannten Systemen die Folge, daß die Beschik- kungsholme beim Ablegen des Werkstückes nacheinander nach außen bewegt werden müssen, d.h. der zweite Beschickungsholm kann erst dann seine Freigabebewegung beginnen, wenn der erste Beschickungsholm schon den Bereich des Werkstückes verlassen hat und dieses mit der entsprechenden Kante auf die Presse gelangt ist. Dies wiederum bedeutet, daß der zweite Beschickungsholm noch den vollen Freigabeweg zurückfahren muß, um die andere Seite des Werkstückes auf die untere Heizplatte fallen zu lassen. Abhängig vom maschinellen Aufwand, um diese Vorgänge möglichst schnell ablaufen zu lassen, verbleibt also ein gewisser Zeitbereich, in dem das Werkstück mit seinem einen Kantenbereich in Kontakt mit der heißen Heizplatte ist, wogegen der andere Kantenbereich noch von dem zweiten Beschickungsholm Untergriffen und oberhalb der Heizplatte gehalten wird. Insbesondere bei spezifischen Bearbeitungsverfahren, beispielsweise bei der Verpres- sung von harzgetränkten Papieren, die ein Schichtpaket bilden, ist es jedoch sehr wünschenswert, diesen Zeitraum möglichst klein zu halten, da sonst in diesem Schichtpaket Vorgänge ablaufen (z.B. Vorkondensationen), die die gleichmäßige Qualität des Werkstückes beeinträchtigen.The loading devices described have in common that despite the additional devices mentioned, it is not or not sufficiently ensured that no sliding friction occurs between the workpiece and the specific system used for conveying and depositing, which engages under and supports the workpiece. With the three systems mentioned at the beginning, it is necessary that the workpiece is always placed on one side, so that no air cushions form on which the workpiece can blur. In all known systems, this has the consequence that the loading spars have to be moved outwards one after the other when the workpiece is placed down, ie the second loading spar can only then its release movement begins when the first loading spar has already left the area of the workpiece and the corresponding edge has reached the press. This in turn means that the second loading spar still has to travel the full release path in order to drop the other side of the workpiece onto the lower heating plate. Depending on the amount of mechanical work required to make these processes run as quickly as possible, there remains a certain time range in which the workpiece is in contact with the hot heating plate with one edge area, whereas the other edge area is still under the second loading handle and above the heating plate is held. In particular in the case of specific processing methods, for example when pressing resin-impregnated papers that form a layer package, it is very desirable to keep this period as short as possible, since otherwise processes (eg precondensation) take place in this layer package, which reduce the uniform quality of the Affect the workpiece.
Gegenstand der ErfindungSubject of the invention
Der Erfindung liegt folglich die Aufgabe zugrunde, die gattungsgemäße Beschickungsvorrichtung so weiterzubilden, daß beim Ablegen des Werkstückes, beispielsweise eines Schichtpaketes auf die Heizplatte, keine Gleitreibung auftritt, weiterhin soll diese Beschickungsvorrichtung mechanisch einfach aufgebaut sein.The invention is therefore based on the object of developing the generic loading device so that no sliding friction occurs when the workpiece is placed, for example a layer package on the heating plate, furthermore this loading device is to be constructed mechanically simple.
Erfindungsgemäß wird diese Aufgabe gemäß dem kennzeichnenden Teil des Patentanspruchs 1 gelöst.According to the invention, this object is achieved in accordance with the characterizing part of patent claim 1.
Durch die Ausbildung der Halteeinrichtungen als "kleine" Förderbänder ist nicht gewährleistet, daß keinerlei Relativreibung zwischen dem oberen Trum dieser Förderbänder und der Unterseite des jeweils zu bearbeitenden Werkstückes auftritt, so daß folglich auch keine Fehlpositionierungen bei der Ablegung des Werkstückes auf der Presse auftreten können. Gemäß einer besonders vorteilhaften Weiterbildung dieser Lösung ist vorgesehen, diese Förderbänder mechanisch mit der Bewegung der Beschickungsholme derart zu koppeln, daß die Umfangsgeschwindigkeit der beiden Umlenkrollen, die das Förderband tragen, so gewählt ist, daß bei einer Bewegung der Beschickungsholme das obere Trum der Förderbänder mit der gleichen Geschwindigkeit in die entgegengesetzte Richtung sich bewegt, so daß folglich die Absolutgeschwindigkeit eines Punktes auf dem Förderband und somit auch die Relativgeschwindigkeit, bezogen auf das ruhende Werkstück gleich Null ist.The design of the holding devices as "small" conveyor belts does not ensure that no relative friction occurs between the upper run of these conveyor belts and the underside of the workpiece to be machined, so that consequently no incorrect positioning can occur when the workpiece is deposited on the press. According to a particularly advantageous development of this solution, these conveyor belts are mechanically connected to the To couple the movement of the loading spars in such a way that the peripheral speed of the two deflecting rollers which carry the conveyor belt is selected such that when the loading spars move, the upper run of the conveyor belts moves in the opposite direction at the same speed, so that consequently the absolute speed of a point on the conveyor belt and thus the relative speed, based on the stationary workpiece, is zero.
Die erfindungsgemäße Lösung ermöglicht es insbesondere, die beiden Beschickungsholme so zu steuern, daß sie beim Ablegen des Werkstük- kes auf der unteren Heizplatte der Presse bewirken, daß die aus den eingangs erläuterten Gründen erforderliche kippähnliche Ablegebewegung des Werkstückes auf der Presse seitlich minimiert wird, so daß der erwünschte vollflächige Kontakt der Unterseite des Werkstückes mit der Heizplatte in der kürzestmöglichen Zeit hergestellt wird.The solution according to the invention makes it possible, in particular, to control the two loading bars in such a way that when the workpiece is placed on the lower heating plate of the press, the tilting-like laying movement of the workpiece on the press which is necessary for the reasons explained at the beginning is minimized laterally, so that the desired full-surface contact of the underside of the workpiece with the heating plate is established in the shortest possible time.
Kurze Beschreibung des bevorzugten Ausführungsbeispiels:Brief description of the preferred embodiment:
Die erfindungsgemäße Lösung wird nun anhand von Zeichnungen erläutert. Es zeigen:The solution according to the invention will now be explained with reference to drawings. Show it:
Fig. 1 eine schematische Aufsicht auf die erfindunsgemäße Beschickungsvorrichtung,1 is a schematic plan view of the loading device according to the invention,
Fig. 2 eine Teilaufsicht auf einen Eckbereich der Beschickungsvorrichtung nach Fig. 1,2 shows a partial view of a corner area of the loading device according to FIG. 1,
Fig. 3 einen Vertikalschnitt durch einen Teilbereich der Beschickungsvorrichtung,3 shows a vertical section through a partial area of the loading device,
Fig. 4 einen Vertikalschnitt durch die Presse mit der erfindungsgemäßen Beschickungsvorrichtung kurz vor dem Ablegen des Werkstückes auf der unteren Heizplatte undFig. 4 is a vertical section through the press with the loading device according to the invention shortly before placing the workpiece on the lower heating plate and
Fig. 5 einen Vertikal schnitt entsprechend Fig. 4, beim Eintragen des Werkstückes in die Presse. Beschreibung des bevorzugten Ausführungsbeispiels:Fig. 5 is a vertical section corresponding to Fig. 4, when entering the workpiece in the press. Description of the preferred embodiment:
Die erfindungsgemäße Beschickungsvorrichtung dient zur Beschickung einer Presse 10 (Fig. 4,5), von der lediglich der untere Teil mit der unteren Heizplatte 1 dargestellt ist. Zu dieser unteren Heizplatte soll das Werkstück 8 von seiner Position außerhalb der Presse gefördert und dort möglichst positionsgenau abgelegt werden. Hierzu ist zunächst ein Halterahmen 2 vorgesehen, der sich in seiner in die Presse verfahrenen Position bis beidseits der unteren Heizplatte 1 erstreckt und an dem die Beschickungsvorrichtung mit ihren einzelnen Komponenten gehalten ist.The loading device according to the invention is used to load a press 10 (Fig. 4.5), of which only the lower part is shown with the lower heating plate 1. For this lower heating plate, the workpiece 8 is to be conveyed from its position outside the press and to be deposited there as precisely as possible. For this purpose, a holding frame 2 is initially provided, which in its position moved into the press extends to both sides of the lower heating plate 1 and on which the loading device with its individual components is held.
Das wesentliche Bestandteil dieser Beschickungsvorrichtung sind zwei parallel zu den Längsseiten des Halterahmens 2 verschiebbare Beschickungsholme 3A, 3B. In der Aufsicht der Fig. 1 ist der Beschickungsholm 3A ausgefahren dargestellt, d.h. er ragt nicht über die untere Heizplatte 1, wogegen der Beschickungsholm 3B eingefahren dargestellt ist, d.h. er ragt über die untere Heizplatte 1. Zur Führung der Beschickungsholme 3A, 3B sind diese in bekannter Weise mit dem Halterahmen 2 durch jeweils zwei Rohre oder Stangen R verbunden, die in entsprechenden Aufnahmen S des Halterahmens gelagert sind. Die Stangen R der Beschickungsholme 3A, 3B tragen an ihrem zur Innenseite der Presse zeigenden Ende Halteeinrichtungen, auf denen das zu bearbeitende Werkstück 8 aufliegt, wenn beide Beschickungsholme in der eingefahrenen Position sich befinden (Fig. 5), in der sie das Werkstück 8 auch von einer Beladestation in die Presse 10 transportieren können.The essential component of this loading device are two loading bars 3A, 3B which can be displaced parallel to the longitudinal sides of the holding frame 2. In the top view of Fig. 1, the loading spar 3A is shown extended, i.e. it does not protrude above the lower heating plate 1, whereas the loading spar 3B is shown retracted, i.e. it protrudes over the lower heating plate 1. To guide the loading bars 3A, 3B, they are connected in a known manner to the holding frame 2 by two tubes or rods R, which are mounted in corresponding receptacles S of the holding frame. The rods R of the loading spars 3A, 3B carry, on their end pointing towards the inside of the press, holding devices on which the workpiece 8 to be machined rests when both loading spars are in the retracted position (FIG. 5), in which they also hold the workpiece 8 can be transported from a loading station into the press 10.
Die Halteeinrichtungen bestehen aus mehreren Förderbändern 4, deren oberes Trum über die Beschickungsholme 3A, 3B geführt ist. Hierzu ist auf der nach außen zeigenden Schmalseite der Beschickungsholme 3A, 3B eine Umlenkrolle 4A vorgesehen, auf der nach innen zeigenden Stirnseite der Beschickungsholme 3A, 3B sind die Förderbänder 4 über eine gemeinsame Antriebswelle 5 geführt. Zum Antrieb dieser Antriebswelle 5 ist am stirnseitigen Ende 2A eine Zahnstange 6A, 6B montiert, die mit einem Zahnrad 7A, 7B am Ende der Antriebswelle 5A, 5B kämmt. Die Funktion dieses Antriebs ist in Fig. 3 veranschaulicht: Der Durchmesser des Zahnrades 7 ist so gewählt, daß die Förderbänder 4 entgegen der Bewegung der Beschickungsholme 2 mit der gleichen Geschwindigkeit fördern, wie sich die Beschickungsholme nach außen bewegen, so daß die Bewegung der Beschickungsholme 3A, 3B zu keinerlei Reibung zwischen dem oberen Trum der Förderbänder 4 und der Unterseite des Werkstückes 8 führt, unabhängig davon, mit welcher Geschwindigkeit oder Richtung sich die Beschickungsholme bewegen.The holding devices consist of several conveyor belts 4, the upper run of which is guided over the loading bars 3A, 3B. For this purpose, a deflection roller 4A is provided on the outwardly facing narrow side of the loading bars 3A, 3B, on the inwardly facing end face of the loading bars 3A, 3B the conveyor belts 4 are guided via a common drive shaft 5. To drive this drive shaft 5, a rack 6A, 6B is mounted on the front end 2A, which meshes with a gear 7A, 7B at the end of the drive shaft 5A, 5B. The function of this drive is illustrated in Fig. 3: The diameter of the gear 7 is chosen so that the conveyor belts 4 promote against the movement of the loading spars 2 at the same speed as the loading spars move outwards, so that the movement of the loading spars 3A, 3B to no friction between the upper run of the Conveyor belts 4 and the underside of the workpiece 8 leads, regardless of the speed or direction at which the loading bars move.
Ein typischer Bewegungsablauf der erfindungsgemäßen Beschickungsvorrichtung ist wie folgt:A typical sequence of movements of the loading device according to the invention is as follows:
Zunächst befindet sich der Halterahmen 2 außerhalb der Presse in einer Beladestation,wo die Beschickungsholme 3A, 3B unter das Werkstück einfahren, um dieses von anderen Fördereinrichtungen, beispielsweise einem Rollenförderer, zu übernehmen.First of all, the holding frame 2 is located outside the press in a loading station, where the loading bars 3A, 3B move under the workpiece in order to be taken over by other conveying devices, for example a roller conveyor.
Danach wird der Halterahmen 2 in die Presse 10 eingefahren, bis er die gewünschte Position einnimmt, in der sich das Werkstück 8 oberhalb der unteren Heizplatte 1 befindet, gehalten von den eingefahrenen Beschickungsholmen 3A, 3B, diese Position ist in Fig. 5 dargestellt.Thereafter, the holding frame 2 is retracted into the press 10 until it assumes the desired position in which the workpiece 8 is located above the lower heating plate 1, held by the retracted loading bars 3A, 3B, this position is shown in FIG. 5.
Danach beginnt das Ablegen des Werkstückes 8 auf der unteren Heizplatte 1 dadurch, daß mit geringer Zeitverzögerung die beiden Beschickungsholme 3A, 3B ausgefahren werden (große Pfeile in Fig. 4), wobei sich gemäß der oben beschriebenen Zwangskopplung des Antriebes der Förderbänder 4 das obere Trum dieser Förderbänder in die entgegengesetzte Richtung bewegt (kleine Pfeile), und zwar mit derselben Geschwindigkeit, mit der die Beschickungsholme ausgefahren werden, so daß sich zwischen dem oberen Trum der Förderbänder einerseits und der Unterseite des Werkstückes 8 keine Relativbewegung und somit auch keine Reibung ausbilden kann. Beim dargestellten Ausführungsbeispiel der Fig. 4 eilt der Beschickungsholm 3B geringfügig dem Beschickungsholm 3A voraus, so daß die in Fig. 4 rechte Längsseite des Werkstückes 8 bereits auf die untere Heizplatte 1 abgelegt wird, während die entsprechende linke Seitenkante noch gerade im Endbereich der Förderbänder 4 oberhalb der Heizplatte 1 gehalten wird. Es ist aus der Fig. 4 deutlich entnehmbar, daß bei entsprechender Ausfahrgeschwindigkeit der beiden Beschickungsholme die Zeitspanne zwischen dem Ablegen der rechten Seitenkante und dem Ablegen der linken Seitenkante des Werkstückes 8 minimal gehalten werden kann.Thereafter, the depositing of the workpiece 8 on the lower heating plate 1 begins in that the two loading bars 3A, 3B are extended with a slight time delay (large arrows in FIG. 4), the upper run according to the above-described forced coupling of the drive of the conveyor belts 4 this conveyor belts moved in the opposite direction (small arrows), at the same speed at which the loading spars are extended, so that no relative movement and therefore no friction can form between the upper run of the conveyor belts on the one hand and the underside of the workpiece 8 . In the illustrated embodiment of FIG. 4, the loading spar 3B is slightly ahead of the loading spar 3A, so that the right longitudinal side of the workpiece 8 in FIG. 4 is already placed on the lower heating plate 1, while the corresponding left side edge is still straight End region of the conveyor belts 4 is held above the heating plate 1. It can be clearly seen from FIG. 4 that, with an appropriate extension speed of the two loading spars, the time period between depositing the right side edge and depositing the left side edge of the workpiece 8 can be kept to a minimum.
Beim dargestellten Ausführungsbeispiel ist zur mechanischen Zwangskopplung der Förderbänder 4 mit ihren zugehörigen Beschickungsholmen 3A, 3B die beschriebene Zahnstangen-/Zahnradkombination bevorzugt, es ist jedoch genauso gut möglich, diesen Ablauf auch über eine ausgelegte Kette mit Kettenrädern oder auch mittels Riemen und Riemenscheiben zu erreichen. In the illustrated embodiment, the rack and pinion combination described is preferred for the mechanical forced coupling of the conveyor belts 4 with their associated loading bars 3A, 3B, but it is equally possible to achieve this sequence by means of a chain with sprockets or by means of belts and pulleys.

Claims

Patentansprüche claims
1. Beschickungsvorrichtung für eine Plattenpresse mit Fördereinrichtungen, die das zu bearbeitende Werkstück untergreifen, wozu sie zwei senkrecht zur Förderrichtung verfahrbare Beschickungsholme umfaßt die jeweils mindestens zwei Halteeinrichtungen beinhalten, mit denen das zu bearbeitende Werkstück gehalten und in der Presse abgelegt wird, dadurch gekennzeichnet, daß die Halteeinrichtungen aus in Verfahrrichtung seiner zugeordneten Beschickungsholme (3A, 3B) angeordneten Förderbändern (4) bestehen, auf deren oberen Trums das zu bearbeitende Werkstück (8) in der eingefahrenen Position der Beschickungsholme (3A, 3B) aufliegt und daß die Förderbänder (4) so bewegt oder gesteuert werden, daß die Relativgeschwindigkeit der jeweiligen oberen Trums bezogen auf das Werkstück (8) bei allen Bewegungszuständen seines zugeordneten Beschickungsholms (3A, 3B) gleich Null ist.1. Feeding device for a plate press with conveying devices which engage under the workpiece to be machined, for which purpose it comprises two loading spars which can be moved perpendicular to the conveying direction and each contain at least two holding devices with which the workpiece to be machined is held and placed in the press, characterized in that the holding devices consist of conveyor belts (4) arranged in the direction of travel of its associated loading bars (3A, 3B), on the upper run of which the workpiece (8) to be machined rests in the retracted position of the loading bars (3A, 3B) and that the conveyor belts (4) are moved or controlled in such a way that the relative speed of the respective upper run with respect to the workpiece (8) is zero in all movement states of its associated loading spar (3A, 3B).
2. Beschickungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Bewegung der Förderbänder (4) mit der Bewegung des zugehörigen Beschickungsholms (3A, 3B) mechanisch zwangsgekoppelt ist.2. Feeding device according to claim 1, characterized in that the movement of the conveyor belts (4) is mechanically positively coupled to the movement of the associated loading spar (3A, 3B).
3. Beschickungsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß zur Zwangskopplung eine Zahnstange (6A, 6B) vorgesehen ist, die am stirnseitigen Ende (2A) des Halterahmens (2) der Beschik- kungshol e (3A, 3B) angebracht ist, und die mit einem Zahnrad (7) kämmt, das fest mit der gemeinsamen Antriebswelle (5A, 5B) der Förderbänder (4) eines Beschickungsholms (3A, 3B) verbunden ist.3. Loading device according to claim 2, characterized in that a toothed rack (6A, 6B) is provided for the positive coupling, which is attached to the front end (2A) of the holding frame (2) of the loading hole (3A, 3B), and the meshes with a gear (7) which is fixedly connected to the common drive shaft (5A, 5B) of the conveyor belts (4) of a loading bar (3A, 3B).
4. Beschickungsvorrichtung nach Anspruch 1-3, dadurch gekennzeichnet, daß die Förderbänder (4) auf zwei Umlenkrollen (4A, 4B) läuft, die beidseits des zugehörigen Beschickungsholms (3A, 3B) gehalten sind, von denen eine auf der Antriebswelle (S) sitzt. 4. Loading device according to claims 1-3, characterized in that the conveyor belts (4) runs on two deflection rollers (4A, 4B) which are held on both sides of the associated loading spar (3A, 3B), one of which is on the drive shaft (S) sits.
5. Beschickungsvorrichtung für eine Plattenpresse mit Fördereinrichtungen, die das zu bearbeitende Werkstück untergreifen, wozu sie zwei senkrecht zur Förderrichtung verfahrbare Beschickungsholme umfaßt, die jeweils mindestens zwei Halteeinrichtungen beinhalten, mit denen das zu bearbeitende Werkstück gehalten und in der Presse abgelegt wird, dadurch gekennzeichnet, daß die Halteeinrichtungen aus in Verfahrrichtung seiner zugeordneten Beschickungsholme (3A,3B) angeordneten Förderrollen oder -walzen bestehen, auf deren Oberseite das zu bearbeitende Werkstück (8) in der eingefahrenen Position der Beschickungsholme (3A,3B) aufliegt, und daß die Förderrollen oder -walzen mit der Bewegung des Beschickungsholms so zwangsgekoppelt sind, daß die Relativgeschwindigkeit ihrer jeweiligen Oberseite, bezogen auf das Werkstück (8) bei allen Bewegungszuständen seines zugeordneten Beschickungsholms (3A,3B) gleich Null ist.5. Feeding device for a plate press with conveying devices which engage under the workpiece to be machined, for which purpose it comprises two loading bars which can be moved perpendicular to the conveying direction, each comprising at least two holding devices with which the workpiece to be machined is held and placed in the press, characterized in that that the holding devices consist of conveyor rollers or rollers arranged in the direction of travel of its associated loading bars (3A, 3B), on the top of which the workpiece (8) to be machined rests in the retracted position of the loading bars (3A, 3B), and that the conveyor rollers or - roll with the movement of the loading spar are so coupled that the relative speed of their respective top, based on the workpiece (8) in all movement states of its associated loading spar (3A, 3B) is zero.
6. Verfahren zum Betrieb der Beschickungsvorrichtung nach den Ansprüchen 1-5, dadurch gekennzeichnet, daß das Ablegen des zu bearbeitenden Werkstücks (8) in der Presse (10) derart erfolgt, daß die beiden Beschickungsholme (3A, 3B) mit einer Zeitverzögerung angesteuert werden, die derart bemessen ist, daß beide Beschickungsholme (3A, 3B) nahezu gleichzeitig ausfahren, während die Förderbänder (4) beider Beschickungsholme (3A, 3B) das Werkstück (8) untergreifen. 6. A method of operating the loading device according to claims 1-5, characterized in that the depositing of the workpiece to be machined (8) in the press (10) is carried out in such a way that the two loading bars (3A, 3B) are controlled with a time delay , which is dimensioned such that both loading spars (3A, 3B) extend almost simultaneously, while the conveyor belts (4) of both loading spars (3A, 3B) reach under the workpiece (8).
EP97951060A 1996-11-16 1997-11-11 Loading device for a plate press Expired - Lifetime EP0885100B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19647480 1996-11-16
DE19647480A DE19647480C1 (en) 1996-11-16 1996-11-16 Feeding device for a plate press
PCT/DE1997/002628 WO1998022268A1 (en) 1996-11-16 1997-11-11 Loading device for a plate press

Publications (2)

Publication Number Publication Date
EP0885100A1 true EP0885100A1 (en) 1998-12-23
EP0885100B1 EP0885100B1 (en) 2002-05-15

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EP97951060A Expired - Lifetime EP0885100B1 (en) 1996-11-16 1997-11-11 Loading device for a plate press

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US (1) US6065584A (en)
EP (1) EP0885100B1 (en)
AT (1) ATE217569T1 (en)
CA (1) CA2242427C (en)
DE (2) DE19647480C1 (en)
WO (1) WO1998022268A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10201413A1 (en) * 2002-01-15 2003-07-24 Buerkle Gmbh Robert Method and device for loading a plate press
DE10325879A1 (en) * 2003-03-21 2004-11-18 Grob-Werke Burkhart Grob E.K. Movable transport bar
DE102011008650A1 (en) * 2011-01-14 2012-07-19 Robert Bürkle GmbH Method for carrying out a striping correction in a conveyor belt of a press and press with conveyor belt and tape recorder

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Publication number Priority date Publication date Assignee Title
DE2825206C2 (en) * 1978-06-08 1981-10-01 Maschinenfabrik J. Dieffenbacher Gmbh & Co, 7519 Eppingen Device for introducing, pressing and discharging a layer package into a hot press or from a hot press
DE2825296A1 (en) * 1978-06-09 1979-12-13 Basf Ag Quaternisation of dye bases in absence of solvent - with decomposition of excess alkylating agent with ammonia
DE2847273C3 (en) * 1978-10-31 1981-10-08 G. Siempelkamp Gmbh & Co, 4150 Krefeld Panel press with a device for loading the press in the course of the production of tempered chipboard
DE3001010A1 (en) * 1980-01-12 1981-07-16 Maschinenfabrik J. Dieffenbacher Gmbh & Co, 7519 Eppingen Loading and unloading system for panel press - has supporting strips and carrier belt synchronised with feed and discharge members
DE3503156C1 (en) * 1985-01-31 1987-01-02 Wemhoener Heinrich Gmbh Co Process and device for feeding short-cycle presses
DE3914866C2 (en) * 1989-05-05 1996-11-14 Dieffenbacher Gmbh Maschf Device for introducing, pressing and discharging a layer package into a hot press
US6009990A (en) * 1998-01-20 2000-01-04 Davis; William P. Pallet transfer and clamping unit

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US6065584A (en) 2000-05-23
WO1998022268A1 (en) 1998-05-28
DE59707287D1 (en) 2002-06-20
EP0885100B1 (en) 2002-05-15
DE19647480C1 (en) 1998-05-07
CA2242427A1 (en) 1998-05-28
CA2242427C (en) 2003-02-11
ATE217569T1 (en) 2002-06-15

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