EP0367867A1 - Apparatus for heating relatively small work pieces - Google Patents

Apparatus for heating relatively small work pieces Download PDF

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Publication number
EP0367867A1
EP0367867A1 EP88202499A EP88202499A EP0367867A1 EP 0367867 A1 EP0367867 A1 EP 0367867A1 EP 88202499 A EP88202499 A EP 88202499A EP 88202499 A EP88202499 A EP 88202499A EP 0367867 A1 EP0367867 A1 EP 0367867A1
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EP
European Patent Office
Prior art keywords
drying oven
bogie
drying
base plate
workpieces
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.)
Withdrawn
Application number
EP88202499A
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German (de)
French (fr)
Inventor
Werner Josef Kotschwar
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.)
Classic Sanitar-Produkte GmbH
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Classic Sanitar-Produkte GmbH
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Publication date
Application filed by Classic Sanitar-Produkte GmbH filed Critical Classic Sanitar-Produkte GmbH
Priority to EP88202499A priority Critical patent/EP0367867A1/en
Publication of EP0367867A1 publication Critical patent/EP0367867A1/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/02—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in the whole or part of a circle
    • F26B15/04—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in the whole or part of a circle in a horizontal plane

Definitions

  • the invention relates to a device for heating smaller workpieces, in particular for drying layers of paint on workpieces, which consists of a drying oven provided with infrared radiators and a rotating conveyor which transports the workpieces through the drying oven.
  • Drying ovens of various designs are used to dry and harden paint coatings on workpieces. Continuously operating devices are widespread, in which the workpiece by means of an endless chain conveyor or the like by means of heating elements, e.g. Infrared radiators, equipped tunnel oven is transported. This version is generally unsuitable and uneconomical for smaller workpieces. In addition, such a facility requires a lot of space.
  • the invention has for its object to design a device of the generic type in such a way that an economical heating of smaller workpieces is possible with a smaller space requirement.
  • the conveyor consists of a bogie with horizontally rotating support arms, which are rotatable in cycles in a drying station and each provided with a base plate for receiving workpieces and that the drying oven is hood-shaped and lifted at the drying station and is lowerable, the drying oven resting in its lowered position with its lower edge on the relevant base plate.
  • the workpieces are placed on a base plate and rotated into a drying station by means of the bogie, in which the hood-shaped drying oven is lowered onto the base plate.
  • the drying oven which is equipped with infrared radiators, heats the workpieces or the paint coating, whereby solvents evaporate and the paint hardens.
  • the drying oven is lifted off again and the bogie rotated by one cycle, so that a subsequent base plate loaded with workpieces reaches the drying station and the drying oven can be lowered.
  • the compact design takes up little space.
  • the hood-shaped design of the drying oven enables energy-saving heating or heating of the workpieces.
  • the bogie has the advantage that special stations can be set up for loading and unloading, for cooling or for further processing or assembly measures. If, for example, the bogie is provided with four support arms and a drive element which adjusts the support arms by 90 °, the station following the drying station can be used for cooling purposes, while the other two stations are used for loading and unloading. Furthermore, the base plates can be equipped with holding or carrying devices for the workpieces. Depending on the size of the workpieces, one or more workpieces to be heated can be placed on the base plate.
  • the drying oven is vertically displaceably mounted on a support post and is provided with a lifting mechanism which lifts the drying oven before the bogie rotates and lowered after the rotation phase.
  • the cyclic rotary drive of the bogie can be designed differently, for example, a pneumatic working cylinder can be provided as the drive member.
  • the lifting mechanism of the drying oven can also be equipped with a pneumatic working cylinder.
  • a particularly compact design results from the fact that the drying oven and the base plate have a circular floor plan. However, other floor plans are also suitable.
  • the entire device forms a structural unit, the support post of the drying oven and a support column supporting the bogie being connected to one another by a frame.
  • the device is expediently equipped with a programmable electronic and pneumatic control device which controls the heating temperature, the heating time and the drive elements for the bogie and the lifting mechanism for the drying oven.
  • the device shown in FIG. 1 is arranged on a frame 1 provided with feet 2. At one end there is a support post 3 which is provided with a lifting mechanism 4 for an oven 8.
  • the lifting mechanism 4 consists of a pneumatic working cylinder 5 with which a bearing head 7 running on guide rods 6 can be raised and lowered vertically is stored.
  • the drying oven 8 attached to the bearing head 7 is hood-shaped. It consists of a hood-shaped sheet metal housing, the inside with thermal insulation, for. B. rock wool is provided.
  • Infrared emitters 9 are attached to the inner jacket of the drying oven 8 in a position and number suitable for the heating purpose.
  • a support column 10 on which a bogie 11 is mounted.
  • the bogie 11 is provided with four horizontally rotating support arms 12 arranged offset by 90 °.
  • a drive member 13 rotates the bogie 11 in a controlled cycle by 90 ° in one direction of rotation.
  • a plate-shaped base plate 14 is fastened, which serves to receive the workpieces to be treated.
  • the base plate 14 is dimensioned and designed such that the lowered drying oven 8 lies with its lower edge 15 tightly on the base plate, and the oven space is closed. Each base plate 14 thus represents an oven closure when the drying oven 8 has been lowered onto it.
  • An electronic and pneumatic control device 16 which is attached to the support post 3, is programmed such that it controls the heating temperature of the drying oven 8, the heating duration, the drive member 13 for the bogie 11 and the hoist 4 for the drying oven 8, the heating temperature and the heating time is adjustable so that different treatment temperatures and times can be set.
  • the bogie 11 is provided with a bearing ring 17 on which four stop bolts 18 are arranged offset by 90 °.
  • the bearing ring 17 is rotatably mounted on a journal 19.
  • a hollow drive shaft 20 projects through the hollow journal 19 and has a pivotably mounted drive pawl 21 at its upper end is provided, which comes to rest against a stop pin 18 when the driver shaft 20 rotates clockwise and takes the bogie 11 with it. If the driver pawl 20 is rotated counterclockwise, the driver shaft 21 provided with a rear sloping surface slides over the stop pin 18 previously taken along.
  • the driver shaft 20 is rotated clockwise by 90 °.
  • its lower end is connected to the piston rod 24 of a pneumatic working cylinder 23 via a crank mechanism 22.
  • the bogie 11 If the piston rod 24 is extended, the bogie 11 is rotated by 90 °. If it is retracted, the driver pawl 21 slides over the bearing ring 17 of the stationary bogie 11 until it engages behind the subsequent stop bolts 18 and is ready for a further rotary movement of the bogie 11, which is triggered by the electronic and pneumatic control device 16. So that the bogie 11 in a working position cannot rotate, a locking pin 25 is provided, which can be displaced by a pneumatic actuating cylinder 26 into a bore 27 provided in the support arms 12. The working cylinder 23 and the actuating cylinder 26 are controlled by means of the electronic and pneumatic control device so that the bogie 11 can only be rotated when the locking bolt 25 is in the non-locking position.
  • the four base plates 14 of the bogie 11 are successively fed to the drying station in time, that is, moved under the drying oven 8.
  • the workpieces (not shown in the drawing) are placed directly on the base plate 14 (loading station) to be moved under the drying oven 8 in the next cycle.
  • the base plate 14 can, however, also be provided with plug-in holes for support rods or the like, which hold, for example, paint-sprayed workpieces in a position on the base plate 14 which is favorable for the drying process.
  • the Sta. Following the drying station tion can serve as a cooling station and unloading can take place on the station opposite the drying station.
  • the adjustable working cycle essentially depends on the heating duration set, which can be set from seconds to hours. The time required for lifting and lowering the drying oven 8, for disengaging and engaging the locking pin 25 and for rotating the bogie 11 by 90 ° is very short.
  • FIGS. 1 and 2 can be modified in many ways within the scope of the invention.
  • two support arms 12 can also be assigned to the bogie 11, the support arm 12 located on the outside serving to unload the cooled workpieces and to load them with new workpieces.
  • a cooling station and a common unloading and loading station can be set up.
  • Five and more support arms 12 may be desired if additional treatment or assembly stations are needed. In all these cases, the amount of twist must be adjusted, e.g. with two support arms 12 a rotation by 180 °, with three support arms 12 such a 120 ° etc.
  • Others e.g. electronic drive systems for lifting and lowering the drying oven 8 and for rotating the bogie 11 in cycles.
  • the drying oven 8 can have a different hood-shaped design, e.g. a square floor plan. Also, instead of infrared radiators 9 other heating elements, for. B. electrical resistance heating elements can be installed, and insulation made of porous refractory stones or the like can be useful.

Abstract

An apparatus for heating relatively small work pieces, in particular for drying paint coatings on work pieces, consists of a drying oven (8) provided with infrared radiators (9) and of a rotating conveyor (5) which conveys the work pieces through the drying oven (8). For a smaller space requirement and an efficient heating of relatively small work pieces, the conveyor consists of a rotary stand (1) having horizontally rotating supporting arms (12) which can be rotated in cycles into a drying station and are each provided with a base plate (14) serving to accommodate work pieces. The drying oven (8) is of hood-shaped design and mounted so as to be liftable and lowerable at the drying station, the drying oven (8), in its lowered position, resting with its bottom edge (15) on the relevant base plate (14). The heating temperature and duration as well as the drive member (13) for the rotary stand (11) and the lifting mechanism (4) for the drying oven (8) are controlled by means of an electronic and pneumatic control device (16). <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zum Erwärmen von kleineren Werkstücken, insbesondere zum Trocknen von Lack­schichten auf Werkstücken, die aus einem mit Infrarotstrah­lern versehenen Trockenofen und einem umlaufenden Förderer besteht, der die Werkstücke durch den Trockenofen transpor­tiert.The invention relates to a device for heating smaller workpieces, in particular for drying layers of paint on workpieces, which consists of a drying oven provided with infrared radiators and a rotating conveyor which transports the workpieces through the drying oven.

Zum Trocknen und Erhärten von Lackbeschichtungen auf Werk­stücken finden Trockenöfen verschiedener Konstruktionen Ver­wendung. Verbreitet sind kontinuierlich arbeitende Einrich­tungen, bei denen das Werkstück mittels eines endlosen Ket­tenförderers o. dgl. durch einen mit Heizelementen, z.B. Infrarotstrahlern, ausgerüsteten Tunnelofen transportiert wird. Für kleinere Werkstücke ist diese Ausführung in der Regel ungeeignet und unwirtschaftlich. Außerdem erfordert eine solche Einrichtung viel Platz.Drying ovens of various designs are used to dry and harden paint coatings on workpieces. Continuously operating devices are widespread, in which the workpiece by means of an endless chain conveyor or the like by means of heating elements, e.g. Infrared radiators, equipped tunnel oven is transported. This version is generally unsuitable and uneconomical for smaller workpieces. In addition, such a facility requires a lot of space.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, ei­ne Einrichtung der gattungsgemäßen Art derart auszubilden, daß bei einem kleineren Platzbedarf eine wirtschaftliche Erwärmung kleinerer Werkstücke möglich ist.In contrast, the invention has for its object to design a device of the generic type in such a way that an economical heating of smaller workpieces is possible with a smaller space requirement.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Förderer aus einem Drehgestell mit horizontal umlaufenden Tragarmen besteht, die taktweise in eine Trockenstation drehbar und jeweils mit einer der Aufnahme von Werkstücken dienenden Bodenplatte versehen sind und daß der Trockenofen haubenförmig ausgebildet und an der Trockenstation heb­ und senkbar gelagert ist, wobei der Trockenofen in seiner abgesenkten Lage mit seinem unteren Rand auf der betreffen­den Bodenplatte aufliegt.This object is achieved in that the conveyor consists of a bogie with horizontally rotating support arms, which are rotatable in cycles in a drying station and each provided with a base plate for receiving workpieces and that the drying oven is hood-shaped and lifted at the drying station and is lowerable, the drying oven resting in its lowered position with its lower edge on the relevant base plate.

Mit dieser Einrichtung werden die Werkstücke auf einer Bo­denplatte plaziert und mittels des Drehgestells in eine Trockenstation gedreht, in der der haubenförmige Trocken­ofen auf die Bodenplatte abgesenkt wird. Der mit Infrarot­strahlern versehene Trockenofen erwärmt die Werkstücke bzw. die Lackbeschichtung, wobei Lösungsmittel verdampfen und der Lack erhärtet. Nach Ablauf der für die Wärmebehandlung benötigten Zeit wird der Trockenofen wieder abgehoben und das Drehgestell um einen Takt verdreht, so daß eine fol­gende, mit Werkstücken beladene Bodenplatte in die Trocken­station gelangt und der Trockenofen abgesenkt werden kann. Die kompakte Bauweise verlangt nur wenig Platz. Durch die haubenförmige Ausbildung des Trockenofens ist eine energie­sparende Beheizung bzw. Erwärmung der Werkstücke möglich.With this device, the workpieces are placed on a base plate and rotated into a drying station by means of the bogie, in which the hood-shaped drying oven is lowered onto the base plate. The drying oven, which is equipped with infrared radiators, heats the workpieces or the paint coating, whereby solvents evaporate and the paint hardens. After the time required for the heat treatment has elapsed, the drying oven is lifted off again and the bogie rotated by one cycle, so that a subsequent base plate loaded with workpieces reaches the drying station and the drying oven can be lowered. The compact design takes up little space. The hood-shaped design of the drying oven enables energy-saving heating or heating of the workpieces.

Das Drehgestell hat den Vorteil, daß zum Be- und Entladen, zum Kühlen oder für weitere Bearbeitungs- oder Montagemaß­nahmen besondere Stationen eingerichtet werden können. Ist das Drehgestell beispielsweise mit vier Tragarmen und ei­nem Antriebsorgan versehen, welches die Tragarme taktwei­se um 90° verstellt, kann die der Trockenstation folgende Station für Kühlzwecke verwendet werden, während die bei­den anderen Stationen der Be- bzw. Entladung dienen. Wei­terhin können die Bodenplatten mit Halte- oder Tragein­richtungen für die Werkstücke ausgerüstet sein. Je nach der Größe der Werkstücke können auf der Bodenplatte ein oder mehrere zu erwärmende Werkstücke abgestellt werden.The bogie has the advantage that special stations can be set up for loading and unloading, for cooling or for further processing or assembly measures. If, for example, the bogie is provided with four support arms and a drive element which adjusts the support arms by 90 °, the station following the drying station can be used for cooling purposes, while the other two stations are used for loading and unloading. Furthermore, the base plates can be equipped with holding or carrying devices for the workpieces. Depending on the size of the workpieces, one or more workpieces to be heated can be placed on the base plate.

Die Höhenverstellung des haubenförmigen Trockenofens läßt sich konstruktiv verschieden lösen. Nach einer Ausführungs­form ist der Trockenofen an einem Tragpfosten lotrecht ver­schiebbar gelagert und mit einem Hubwerk versehen, welches den Trockenofen vor einer Drehphase des Drehgestells anhebt und nach beendeter Drehphase absenkt. Ebenso kann der takt­weise Drehantrieb des Drehgestells verschiedenartig ausge­führt sein, beispielsweise kann als Antriebsorgan ein pneu­matischer Arbeitszylinder vorgesehen sein. Auch das Hubwerk des Trockenofens kann mit einem pneumatischen Arbeitszylin­der ausgerüstet sein.The height adjustment of the hood-shaped drying oven can be solved in different ways. According to one embodiment, the drying oven is vertically displaceably mounted on a support post and is provided with a lifting mechanism which lifts the drying oven before the bogie rotates and lowered after the rotation phase. Likewise, the cyclic rotary drive of the bogie can be designed differently, for example, a pneumatic working cylinder can be provided as the drive member. The lifting mechanism of the drying oven can also be equipped with a pneumatic working cylinder.

Eine besonders kompakte Bauweise ergibt sich dadurch, daß der Trockenofen und die Bodenplatte einen kreisrunden Grund­riß haben. Doch sind auch andere Grundrisse geeignet. Für eine einfache Montage bildet die gesamte Einrichtung eine Baueinheit, wobei der Tragpfosten des Trockenofens und ei­ne das Drehgestell tragende Stützsäule durch einen Rahmen miteinander verbunden sind.A particularly compact design results from the fact that the drying oven and the base plate have a circular floor plan. However, other floor plans are also suitable. For easy installation, the entire device forms a structural unit, the support post of the drying oven and a support column supporting the bogie being connected to one another by a frame.

Die Einrichtung ist zweckmäßig mit einer programmierbaren elektronischen und pneumatischen Steuereinrichtung ausge­stattet, welche die Heiztemperatur, die Heizdauer und die Antriebsorgane für das Drehgestell und das Hubwerk für den Trockenofen steuert.The device is expediently equipped with a programmable electronic and pneumatic control device which controls the heating temperature, the heating time and the drive elements for the bogie and the lifting mechanism for the drying oven.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt; es zeigt

  • Fig. 1 eine Einrichtung zum Erwärmen von kleineren Werk­stücken in einer perspektivischen Darstellung mit einem Vertikalschnitt durch den Trockenofen und
  • Fig. 2 einen Ausschnitt des in Fig. 1 dargestellten Dreh­gestells in einem größeren Maßstab.
An embodiment of the invention is shown in the drawing; it shows
  • Fig. 1 shows a device for heating smaller workpieces in a perspective view with a vertical section through the drying oven and
  • Fig. 2 shows a detail of the bogie shown in Fig. 1 on a larger scale.

Die in Fig. 1 dargestellte Einrichtung ist an einem mit Fü­ßen 2 versehenen Rahmen 1 angeordnet. An einem Ende befin­det sich ein Tragpfosten 3, der mit einem Hubwerk 4 für ei- Trockenofen 8 versehen ist. Das Hubwerk 4 besteht aus einem pneumatischen Arbeitszylinder 5, mit dem ein auf Führungs­stangen 6 laufender Lagerkopf 7 vertikal heb- und senkbar gelagert ist. Der am Lagerkopf 7 befestigte Trockenofen 8 ist haubenförmig ausgebildet. Er besteht aus einem hauben­förmigen Blechgehäuse, das im Inneren mit einer Wärmeiso­lierung, z. B. Steinwolle, versehen ist. Am Innenmantel des Trockenofens 8 sind Infrarotstrahler 9 in einer für den Beheizungszweck geeigneten Lage und Anzahl angebracht.The device shown in FIG. 1 is arranged on a frame 1 provided with feet 2. At one end there is a support post 3 which is provided with a lifting mechanism 4 for an oven 8. The lifting mechanism 4 consists of a pneumatic working cylinder 5 with which a bearing head 7 running on guide rods 6 can be raised and lowered vertically is stored. The drying oven 8 attached to the bearing head 7 is hood-shaped. It consists of a hood-shaped sheet metal housing, the inside with thermal insulation, for. B. rock wool is provided. Infrared emitters 9 are attached to the inner jacket of the drying oven 8 in a position and number suitable for the heating purpose.

Am anderen Ende des Rahmens 1 befindet sich eine Stützsäu­le 10, auf der ein Drehgestell 11 gelagert ist. Das Drehge­stell 11 ist mit vier horizontal umlaufenden um 90° ver­setzt angeordneten Tragarmen 12 versehen. Ein Antriebsor­gan 13 dreht das Drehgestell 11 in einem gesteuerten Takt um jeweils 90° in einer Drehrichtung weiter. Am Ende eines jeden Tragarmes 12 ist eine tellerförmige Bodenplatte 14 befestigt, die der Aufnahme der zu behandelnden Werkstücke dient. Die Bodenplatte 14 ist derart bemessen und gestal­tet, daß der abgesenkte Trockenofen 8 mit seinem unteren Rand 15 dicht auf der Bodenplatte aufliegt, und der Ofen­raum verschlossen ist. Jede Bodenplatte 14 stellt somit ei­nen Ofenverschluß dar, wenn der Trockenofen 8 auf diese abgesenkt worden ist.At the other end of the frame 1 there is a support column 10 on which a bogie 11 is mounted. The bogie 11 is provided with four horizontally rotating support arms 12 arranged offset by 90 °. A drive member 13 rotates the bogie 11 in a controlled cycle by 90 ° in one direction of rotation. At the end of each support arm 12, a plate-shaped base plate 14 is fastened, which serves to receive the workpieces to be treated. The base plate 14 is dimensioned and designed such that the lowered drying oven 8 lies with its lower edge 15 tightly on the base plate, and the oven space is closed. Each base plate 14 thus represents an oven closure when the drying oven 8 has been lowered onto it.

Eine elektronische und pneumatischen Steuereinrichtung 16, die am Tragpfosten 3 angebracht ist, ist derart program­miert, daß sie die Heiztemperatur des Trockenofens 8, die Heizdauer, das Antriebsorgan 13 für das Drehgestell 11 und das Hubwerk 4 für den Trockenofen 8 steuert, wobei die Heiztemperatur und die Heizdauer verstellbar sind, so daß verschiedene Behandlungstemperaturen und -zeiten einstell­bar sind.An electronic and pneumatic control device 16, which is attached to the support post 3, is programmed such that it controls the heating temperature of the drying oven 8, the heating duration, the drive member 13 for the bogie 11 and the hoist 4 for the drying oven 8, the heating temperature and the heating time is adjustable so that different treatment temperatures and times can be set.

Wie Fig. 2 zeigt, ist das Drehgestell 11 mit einem Lager­ring 17 versehen, auf dem vier um 90° versetzt angeordnete Anschlagbolzen 18 angebracht sind. Der Lagerring 17 ist auf einem Lagerzapfen 19 drehbar gelagert. Den hohlen Lagerzap­fen 19 durchragt eine Mitnehmerwelle 20, die an ihrem obe­ren Ende mit einer schwenkbar gelagerten Mitnehmerklinke 21 versehen ist, welche bei einer Drehung der Mitnehmerwelle 20 im Uhrzeigersinn gegen einen Anschlagsbolzen 18 zur An­lage kommt und das Drehgestell 11 mitnimmt. Wird die Mit­nehmerklinke 20 entgegen dem Uhrzeigersinn zurückgedreht, gleitet die mit einer rückwärtigen Schrägfläche versehene Mitnehmerwelle 21 über den zuvor mitgenommenen Anschlag­bolzen 18. Die Mitnehmerwelle 20 wird taktweise um 90° verdreht. Für diesen Zweck ist ihr unteres Ende über ein Kurbelgetriebe 22 mit der Kolbenstange 24 eines pneumati­schen Arbeitszylinders 23 verbunden. Wird die Kolbenstange 24 ausgefahren, wird das Drehgestell 11 um 90° verdreht. Wird sie eingefahren, rutscht die Mitnehmerklinke 21 über den Lagerring 17 des stehenbleibenden Drehgestells 11, bis sie hinter den nachfolgenden Anschlagbolzen 18 einrastet und für eine weitere Drehbewegung des Drehgestells 11 be­reit ist, die durch die elektronische und pneumatische Steuereinrichtung 16 ausgelöst wird. Damit sich das in ei­ner Arbeitsstellung befindliche Drehgestell 11 nicht ver­drehen kann, ist ein Sperrbolzen 25 vorgesehen, der von ei­nem pneumatischen Stellzylinder 26 in eine an den Tragarmen 12 vorgesehene Bohrung 27 verschiebbar ist. Der Arbeitszy­linder 23 und der Stellzylinder 26 werden mittels der elek­tronischen und pneumatischen Steuereinrichtung so gesteuert, daß eine Verdrehung des Drehgestells 11 nur erfolgen kann, wenn sich der Sperrbolzen 25 in der nicht verriegelnden Lage befindet.As shown in FIG. 2, the bogie 11 is provided with a bearing ring 17 on which four stop bolts 18 are arranged offset by 90 °. The bearing ring 17 is rotatably mounted on a journal 19. A hollow drive shaft 20 projects through the hollow journal 19 and has a pivotably mounted drive pawl 21 at its upper end is provided, which comes to rest against a stop pin 18 when the driver shaft 20 rotates clockwise and takes the bogie 11 with it. If the driver pawl 20 is rotated counterclockwise, the driver shaft 21 provided with a rear sloping surface slides over the stop pin 18 previously taken along. The driver shaft 20 is rotated clockwise by 90 °. For this purpose, its lower end is connected to the piston rod 24 of a pneumatic working cylinder 23 via a crank mechanism 22. If the piston rod 24 is extended, the bogie 11 is rotated by 90 °. If it is retracted, the driver pawl 21 slides over the bearing ring 17 of the stationary bogie 11 until it engages behind the subsequent stop bolts 18 and is ready for a further rotary movement of the bogie 11, which is triggered by the electronic and pneumatic control device 16. So that the bogie 11 in a working position cannot rotate, a locking pin 25 is provided, which can be displaced by a pneumatic actuating cylinder 26 into a bore 27 provided in the support arms 12. The working cylinder 23 and the actuating cylinder 26 are controlled by means of the electronic and pneumatic control device so that the bogie 11 can only be rotated when the locking bolt 25 is in the non-locking position.

Die vier Bodenplatten 14 des Drehgestells 11 werden auf­einanderfolgend im Takt der Trockenstation zugeführt, das heißt, unter den Trockenofen 8 gefahren. Die Werkstücke (in der Zeichnung nicht dargestellt) werden unmittelbar auf die im nächstfolgenden Takt unter den Trockenofen 8 zu fahrende Bodenplatte 14 (Beladestation) gelegt. Die Bodenplatte 14 kann aber auch mit Steckbohrungen für Trägerstangen o. dgl. versehen sein, welche z.B. lackgespritzte Werkstücke in ei­ner für den Trocknungsvorgang günstigen Lage auf der Boden­platte 14 halten. Die auf die Trockenstation folgende Sta­ tion kann als Kühlstation dienen und auf der der Trocknungs­station gegenüberliegenden Station kann die Entladung erfol­gen. Der einstellbare Arbeitstakt hängt im wesentlichen von der eingestellten Heizdauer ab, die von Sekunden bis auf Stunden einstellbar ist. Die zum Abheben und Absenken des Trockenofens 8, zum Aus- und Einrasten des Sperrbolzens 25 und zum Verdrehen des Drehgestells 11 um 90° benötigte Zeit ist sehr kurz.The four base plates 14 of the bogie 11 are successively fed to the drying station in time, that is, moved under the drying oven 8. The workpieces (not shown in the drawing) are placed directly on the base plate 14 (loading station) to be moved under the drying oven 8 in the next cycle. The base plate 14 can, however, also be provided with plug-in holes for support rods or the like, which hold, for example, paint-sprayed workpieces in a position on the base plate 14 which is favorable for the drying process. The Sta. Following the drying station tion can serve as a cooling station and unloading can take place on the station opposite the drying station. The adjustable working cycle essentially depends on the heating duration set, which can be set from seconds to hours. The time required for lifting and lowering the drying oven 8, for disengaging and engaging the locking pin 25 and for rotating the bogie 11 by 90 ° is very short.

Die in den Fig. 1 und 2 dargestellte Ausführung kann im Rahmen der Erfindung mannigfaltig abgewandelt werden. So können dem Drehgestell 11 statt vier Tragarme 12 auch zwei Tragarme 12 zugeordnet sein, wobei der außen befindliche Tragarm 12 der Entladung der abgekühlten Werkstücke und der Beladung mit neuen Werkstücken dient. Bei drei Tragarmen 12 kann eine Abkühlstation und eine gemeinsame Entlade- und Be­ladestation eingerichtet werden. Fünf und mehrere Tragarme 12 können dann erwünscht sein, wenn zusätzliche Behandlungs­oder Montagestationen benötigt werden. In all diesen Fällen ist das Maß der Verdrehung anzupassen, also z.B. bei zwei Tragarmen 12 eine Verdrehung um 180°, bei drei Tragarmen 12 eine solche um 120° usw. vorzusehen. Auch können andere, z.B. elektronische Antriebssysteme für das Abheben und Ab­senken des Trockenofens 8 und für das taktweise Verdrehen des Drehgestells 11 gewählt werden. Der Trockenofen 8 kann eine andere haubenförmige Gestaltung erhalten, z.B. einen quadratischen Grundriß. Auch können statt Infrarotstrahler 9 andere Heizelemente, z. B. elektrische Widerstandsheizele mente eingebaut werden, wobei auch eine Isolierung aus porö­sen feuerfesten Steinen o. dgl. zweckmäßig sein kann.The embodiment shown in FIGS. 1 and 2 can be modified in many ways within the scope of the invention. Thus, instead of four support arms 12, two support arms 12 can also be assigned to the bogie 11, the support arm 12 located on the outside serving to unload the cooled workpieces and to load them with new workpieces. With three support arms 12, a cooling station and a common unloading and loading station can be set up. Five and more support arms 12 may be desired if additional treatment or assembly stations are needed. In all these cases, the amount of twist must be adjusted, e.g. with two support arms 12 a rotation by 180 °, with three support arms 12 such a 120 ° etc. Others, e.g. electronic drive systems for lifting and lowering the drying oven 8 and for rotating the bogie 11 in cycles. The drying oven 8 can have a different hood-shaped design, e.g. a square floor plan. Also, instead of infrared radiators 9 other heating elements, for. B. electrical resistance heating elements can be installed, and insulation made of porous refractory stones or the like can be useful.

Claims (7)

1. Einrichtung zum Erwärmen von kleineren Werkstücken, ins­besondere zum Trocknen von Lackschichten auf Werkstük­ken, bestehend aus einem mit Infrarotstrahlern versehe­nen Trockenofen und einem umlaufenden Förderer, der die Werkstücke durch den Trockenofen transportiert, dadurch gekennzeichnet, daß der Förderer aus einem Drehgestell (11) mit horizontal umlaufenden Tragarmen (12) besteht, die taktweise in eine Trockenstation drehbar und je­weils mit einer der Aufnahme von Werkstücken dienenden Bodenplatte (14) versehen sind und daß der Trockenofen (8) haubenförmig ausgebildet und an der Trockenstation heb- und senkbar gelagert ist, wobei der Trockenofen (8) in seiner abgesenkten Lage mit seinem unteren Rand (15) auf der betreffenden Bodenplatte (14) aufliegt.1. Device for heating smaller workpieces, in particular for drying layers of paint on workpieces, consisting of a drying oven provided with infrared radiators and a rotating conveyor that transports the workpieces through the drying oven, characterized in that the conveyor with a bogie (11) there are horizontally rotating support arms (12), which can be rotated in cycles into a drying station and each provided with a base plate (14) for receiving workpieces, and that the drying oven (8) is hood-shaped and can be raised and lowered at the drying station, whereby the drying oven (8) lies in its lowered position with its lower edge (15) on the relevant base plate (14). 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Drehgestell (11) mit vier Tragarmen (12) und einem Antriebsorgan (13) versehen ist, welches die Tragarme (12) taktweise um 90° verstellt.2. Device according to claim 1, characterized in that the bogie (11) is provided with four support arms (12) and a drive member (13) which adjusts the support arms (12) intermittently by 90 °. 3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß der Trockenofen (8) an einem Tragpfosten (3) lotrecht verschiebbar gelagert und mit einem Hubwerk (4) versehen ist, welches den Trockenofen (8) vor einer Dreh­phase des Drehgestells (11) anhebt und nach beendeter Drehphase absenkt.3. Device according to claim 1 or 2, characterized in that the drying oven (8) on a support post (3) is mounted vertically displaceably and is provided with a lifting mechanism (4) which the drying oven (8) before a rotating phase of the bogie (11th ) raises and lowers after the turning phase. 4. Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Antriebsorgan (13) für das Dreh­gestell (11) und das Hubwerk (4) für den Trockenofen (8) jeweils mit einem pneumatischen Arbeitszylinder (5 bzw. 23) versehen ist.4. Device according to one of claims 1 to 3, characterized in that the drive member (13) for the bogie (11) and the lifting mechanism (4) for the drying oven (8) each have a pneumatic working cylinder (5 or 23) is. 5. Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Trockenofen (8) und die Boden­platte (14) einen kreisrunden Grundriß haben.5. Device according to one of claims 1 to 4, characterized in that the drying oven (8) and the base plate (14) have a circular plan. 6. Einrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Tragpfosten (3) des Trockenofens (8) und eine das Drehgestell (11) tragende Stützsäule (10) durch einen Rahmen (1) miteinander verbunden sind.6. Device according to one of claims 1 to 5, characterized in that the support post (3) of the drying oven (8) and a support column (10) supporting the bogie (11) are connected to one another by a frame (1). 7. Einrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß eine programmierbare elektronische und pneumatische Steuereinrichtung (16) vorgesehen ist, welche die Heiztemperatur, die Heizdauer, das Antriebs­organ (13) für das Drehgestell (11) und das Hubwerk (4) für den Trockenofen (8) steuert.7. Device according to one of claims 1 to 6, characterized in that a programmable electronic and pneumatic control device (16) is provided, which the heating temperature, the heating duration, the drive member (13) for the bogie (11) and the lifting mechanism (4th ) controls for the drying oven (8).
EP88202499A 1988-11-09 1988-11-09 Apparatus for heating relatively small work pieces Withdrawn EP0367867A1 (en)

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EP88202499A EP0367867A1 (en) 1988-11-09 1988-11-09 Apparatus for heating relatively small work pieces

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EP88202499A EP0367867A1 (en) 1988-11-09 1988-11-09 Apparatus for heating relatively small work pieces

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456829A1 (en) * 1989-11-28 1991-11-21 Mita Industrial Co. Ltd. Heat-treatment device and method of drying functional thin film using said device
WO1999013741A1 (en) * 1997-09-18 1999-03-25 Paul Bernard Newman Microbial decontamination of food
DE102005039875A1 (en) * 2005-08-23 2007-03-01 Klaus-Peter König Coating device for coating small parts

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589088A (en) * 1944-07-08 1952-03-11 Johnson John Arthur Drying clayware and other goods
FR1159009A (en) * 1956-10-06 1958-06-23 Luchaire Sa Mobile infrared drying device
FR1460799A (en) * 1965-10-18 1966-01-07 Drying device
DE2431298A1 (en) * 1973-03-07 1976-01-08 Rinter Technik Ag SYSTEM TO ACCELERATE THE SETTING OF PRECAST CONCRETE ELEMENTS
GB2082740A (en) * 1980-08-19 1982-03-10 Gittins Thomas Mervyn Curing kiln
EP0143568A2 (en) * 1983-11-02 1985-06-05 American Screen Printing Equipment Company Curing apparatus with ejector mechanism
US4579614A (en) * 1985-01-11 1986-04-01 Owens-Illinois, Inc. Label shrink oven

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589088A (en) * 1944-07-08 1952-03-11 Johnson John Arthur Drying clayware and other goods
FR1159009A (en) * 1956-10-06 1958-06-23 Luchaire Sa Mobile infrared drying device
FR1460799A (en) * 1965-10-18 1966-01-07 Drying device
DE2431298A1 (en) * 1973-03-07 1976-01-08 Rinter Technik Ag SYSTEM TO ACCELERATE THE SETTING OF PRECAST CONCRETE ELEMENTS
GB2082740A (en) * 1980-08-19 1982-03-10 Gittins Thomas Mervyn Curing kiln
EP0143568A2 (en) * 1983-11-02 1985-06-05 American Screen Printing Equipment Company Curing apparatus with ejector mechanism
US4579614A (en) * 1985-01-11 1986-04-01 Owens-Illinois, Inc. Label shrink oven

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456829A1 (en) * 1989-11-28 1991-11-21 Mita Industrial Co. Ltd. Heat-treatment device and method of drying functional thin film using said device
EP0456829A4 (en) * 1989-11-28 1992-05-13 Mita Industrial Co. Ltd. Heat-treatment device and method of drying functional thin film using said device
WO1999013741A1 (en) * 1997-09-18 1999-03-25 Paul Bernard Newman Microbial decontamination of food
DE102005039875A1 (en) * 2005-08-23 2007-03-01 Klaus-Peter König Coating device for coating small parts
DE102005039875B4 (en) * 2005-08-23 2007-10-25 Klaus-Peter König Coating device for coating small parts
DE102005039875C5 (en) * 2005-08-23 2010-02-25 Klaus-Peter König Coating device for coating small parts

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