EP0160810B1 - Enclosure for powder coating - Google Patents

Enclosure for powder coating Download PDF

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Publication number
EP0160810B1
EP0160810B1 EP85102871A EP85102871A EP0160810B1 EP 0160810 B1 EP0160810 B1 EP 0160810B1 EP 85102871 A EP85102871 A EP 85102871A EP 85102871 A EP85102871 A EP 85102871A EP 0160810 B1 EP0160810 B1 EP 0160810B1
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EP
European Patent Office
Prior art keywords
cabin
blades
powder
drive line
floor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85102871A
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German (de)
French (fr)
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EP0160810A1 (en
Inventor
Bernard Dinkel
Silvano Gelain
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.)
Gema Switzerland GmbH
Original Assignee
Gema Switzerland 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 Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Priority to AT85102871T priority Critical patent/ATE33565T1/en
Publication of EP0160810A1 publication Critical patent/EP0160810A1/en
Application granted granted Critical
Publication of EP0160810B1 publication Critical patent/EP0160810B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools, brushes, or analogous members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/41—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth

Definitions

  • the invention relates to a powder coating booth with a booth floor, a powder collection device on the booth floor, two doctor blades arranged one behind the other for wiping powder from the booth floor to the powder collection device, which is arranged between the doctor blades, and a drive train pulling the doctor blade for moving the doctor blade forward and back together , wherein during the advancement of one squeegee from a starting position to the powder collecting device, the other squeegee is moved back into its starting position by the powder collecting device.
  • Such a powder coating booth is known from FIGS. 6 and 7 of DE-A-2219040.
  • the cabin floor has the shape of two floor trays running parallel to each other in the longitudinal direction of the cabin, each with a suction shaft at the deepest tub location.
  • the doctor blades are connected to each other by a transport chain, through which they are moved back and forth. During the advance movement, a squeegee is advanced in each floor trough from a starting position to the suction shaft designed as a powder collection device, while the other squeegee of the relevant trough is moved back from the suction shaft to a starting position.
  • the squeegees graze on the cabin floor both during the forward movement and during the backward movement.
  • 1 to 5 of the same document show an embodiment in which the squeegees are pivotally guided in slots in the cabin walls such that the squeegees only graze on the floor during the forward movement, but are pivoted into a position at the start of the backward movement, at which they are at a distance from the ground.
  • the forward movements and backward movements of the doctor blade are not coordinated with one another in time so that the forward movement of one doctor blade corresponds to the backward movement of the other doctor blade.
  • a cabin for cleaning objects by irradiation with sand or metal granules is known.
  • a slide slot serving as a collecting device which extends across the cabin in the middle of the cabin, is arranged on both sides, in each case a plurality of carriages, which carry swiveling squeegees and can be moved back and forth by cable pulls.
  • the squeegees slide over a floor to be cleaned below a grid-like or perforated work platform, which forms the actual cabin floor.
  • the squeegees are pivotally connected to the slide via swivel axes.
  • the axes extend transversely to the direction of movement and the cables are passed through slots which are formed in the upper ends of the doctor blade. This causes the squeegees of carriers of the cables to be pivoted into a lower position for cleaning the floor during the forward movement, and during the backward movement the squeegees are pivoted into a position raised from the ground.
  • the object of the invention is to design the powder coating booth in such a way that the downtimes or downtimes required for cleaning are shortened.
  • FIG. 1 shows a squeegee carriage unit 2 with two squeegees 4 and 6 in a position shifted to the left with reference to the drawing in the lower left part of a powder coating booth 8 according to the invention.
  • the squeegee 4 shown on the left in the drawing is in its starting position and the squeegee 6 shown on the right is above the powder collection area 14, which is formed by an opening 14 in the cabin floor 12.
  • the opening 14 is located in the middle on half the length of the cabin 8 and extends over the entire width of the cabin floor 1. Below the opening 14 there is a collecting container 16.
  • the two doctor blades 4 and 6 are each pivotally mounted in a cross member 20 about an axis 18 extending in the cabin transverse direction.
  • the cross members 20 are connected to one another by longitudinal members 22.
  • a drive train 24 contains an endless cable 26 which runs over rollers 28 and 30 arranged outside the cabin 8, of which one roller 28 is driven by a motor 32.
  • the cable 26 is passed through a central slot 34 of the doctor blade 4 and 6 shown in FIG. 4 and is provided with drivers 36 on each side of this doctor blade. These drivers 36 sit on a tube 40 which is fastened on the rope 26 passed through it.
  • the squeegee drawn by the cable 26 - squeegee 6 in FIG. 1 - lies against a stop 38 of the squeegee carrier 20.
  • the squeegee 6 drawn in the forward direction to the opening 14 pushes the other squeegee 4 in the backward direction via the longitudinal member 22 its starting position shown in Fig. 1, the drivers 36 of the rope 26 pivot this other doctor blade 4 in the backward direction away from the floor 12 upwards into an out-of-operation position.
  • the two squeegees 4 and 6 move as a unit 2 to the left until, according to FIG. 1, the left squeegee 4 is opposite an inductive proximity switch 42 arranged on the left end wall 10 of the cabin 8, which thus acts as a limit switch.
  • the motor 32 for driving the cable 26 is then switched off or switched over.
  • the cable 26 moves the squeegee carriage unit 2 to the right from the position shown in FIG. 1 in the direction of the arrow 44.
  • the right squeegee 6 is pivoted in the direction 44 of its backward movement according to FIG. 2 into an out-of-operation position by the drivers 36 of the cable 26, while the left squeegee 4 in the direction of its forward movement, which is the same as the mentioned backward movement 44 of the other squeegee 6, is pivoted downward against the cabin floor 12 into its operating position until it abuts its stop 38.
  • the entire squeegee carriage unit 2 is moved in the forward direction 44 by the drivers 36, which bear against the left squeegee 4.
  • the squeegees 4 and 6 have the positions shown in FIGS. 2 and 3 and the left squeegee 4 squeegees powder 48 present on the floor 12 into the opening 14 and into the collecting container 16 underneath according to FIGS. 2 and 3.
  • the forward movement 44 of the left squeegee 4 continues until it is above the opening 14, the right squeegee 6 simultaneously reaching its end position shown in FIG. 3 and opposite an inductive proximity switch 52 arranged on the right end wall 50 of the cabin.
  • the direction of movement of the cable 26 is reversed, so that the right squeegee 6 is now pivoted downward by the drivers 36 against the floor 12 into the operating position and moved in the forward direction according to the arrow 52 to the opening 14.
  • the forward movement 52 of the right squeegee 6 is now simultaneously the backward movement direction of the left squeegee 4, which in the inoperative position shown in FIG is moved back into the end position shown in Fig. 1.
  • these doctor blades 4 and 6 can be provided with gas nozzles 54 which are directed against the bottom 12 and are connected to a compressed gas source 5.
  • the opening 14 extends over the entire width of the cabin floor 12.
  • the doctor blades 4 and 6 can be provided with a doctor blade edge 57 made of a different material, corresponding to the doctor blade 6 shown in FIG.
  • the doctor blade carriage unit 2, which carries both doctor blades 4 and 6, is provided on both longitudinal sides with sliding elements 58, which sit on slide rails 60 of the cabin side walls 62 and can be displaced thereon in the longitudinal direction of the cabin. 4 also shows that the drive train 24 runs with the cable 26 in the middle of the cabin in the longitudinal direction of the cabin. In order to avoid contamination of the lower run 64 of the cable 12 below the cabin floor 12 but through the container 16, it is passed through a pipe 66 in the container 16.
  • the upper run 70 of the rope 26 is passed through the end walls 10 and 50 of the cabin 8.
  • a narrow opening is formed in the end walls.
  • the opening is formed in each case by an insert 76 in which a conical bore 78 narrowing from the outside of the wall towards the inside of the wall is formed, through which the cable 26 runs through.
  • a gas nozzle 80 arranged outside the end wall 10 is connected via a line 82 to the compressed gas source 56 shown in FIG. 1 and blows compressed gas against the cable 26 within the narrowing bore 78.
  • the cabin floor 12 can always be kept so clean that an excessively large amount of powder 40 does not accumulate. This prevents an explosively high accumulation of powder and the booth can be cleaned more quickly if you want to change from one type of powder to another.
  • the squeegee carriage unit 2 can be easily lifted off the slide rails 60 of the cabin and exchanged for another squeegee carriage unit, so that there are no downtimes for cleaning the squeegee carriage unit.
  • the gas nozzle 80 which is directed through the bore 78 into the interior 83 of the cabin, keeps the cable 26 constantly clean and prevents powder from escaping from the cabin.
  • a chain or alternately loaded reciprocating pistons or suitable other known drive devices can also be used for the drive train 24.
  • the simplest is a rope or a chain.

Abstract

A powder coating booth has a bottom surface on which powder is collected and from which the powder should be removed. Two scrapers are supported on a transport device which move them together. Each scraper is movable from its respective end of the booth toward a central collection region. Since the scrapers are moved simultaneously, one is moving toward the collection region while the other is moving away. As a scraper moves toward the central collection region, it scrapes powder from the surface and delivers it to the collection region. Each scraper swings into an operating, surface scraping position as it moves from its respective end of the booth toward the collection region, and swings into an upraised, non-scraping position, as each moves from the collection region back to the end region. A cable with scraper engaging flights on it is movable for engaging the scrapers and for moving and for swinging them. The scraper moving cable exits from the booth through a wall and a gas nozzle external to the wall blows powder off the cable and back into the booth.

Description

Die Erfindung betrifft eine Pulverbeschichtungskabine mit einem Kabinenboden, einer Pulversammeleinrichtung am Kabinenboden, zwei mit Abstand hintereinander angeordneten Rakeln zum Abstreifen von Pulver vom Kabinenboden zur Pulversammeleinrichtung hin, welche zwischen den Rakeln angeordnet ist, und einem die Rakel ziehenden Antriebsstrang zum gemeinsamen Vorbewegen und Zurückbewegen der Rakel, wobei während der Vorbewegung des einen Rakels von einer Ausgangsposition zur Pulversammeleinrichtung hin, das andere Rakel von der Pulversammeleinrichtung in seine Ausgangsposition zurückbewegt wird.The invention relates to a powder coating booth with a booth floor, a powder collection device on the booth floor, two doctor blades arranged one behind the other for wiping powder from the booth floor to the powder collection device, which is arranged between the doctor blades, and a drive train pulling the doctor blade for moving the doctor blade forward and back together , wherein during the advancement of one squeegee from a starting position to the powder collecting device, the other squeegee is moved back into its starting position by the powder collecting device.

Eine solche Pulverbeschichtungskabine ist aus den Fig. 6 und 7 der DE-A-2219040 bekannt. Der Kabinenboden hat die Form von zwei parallel nebeneinander in Kabinenlängsrichtung verlaufenden Bodenwannen mit je einem Absaugschacht an der tiefsten Wannenstelle. An jeder Wannenseite befindet sich ein längsverlaufendes Rakel. Die Rakel sind durch eine Transportkette miteinander verbunden, durch welche sie vor und zurückbewegt werden. Während der Vorbewegung wird in jeder Bodenwanne jeweils ein Rakel von einer Ausgangsposition zu dem als Pulversammeleinrichtung ausgebildeten Absaugschacht vorbewegt, während das andere Rakel der betreffenden Wanne von dem Absaugschacht in eine Ausgangsposition zurückbewegt wird. Dabei streifen die Rakel sowohl während der Vorwärtsbewegung als auch während der Rückwärtsbewegung auf dem Kabinenboden. die Fig. 1 bis 5 der gleichen Schrift zeigen eine Ausführungsform, bei welcher die Rakel schwenkbar in Schlitzen der Kabinenwände geführt sind, derart, dass die Rakel nur während der Vorwärtsbewegung auf dem Boden streifen, jedoch am Anfang der Rückwärtsbewegung in eine Stellung geschwenkt werden, in welcher sie einen Abstand vom Boden haben. Bei dieser Ausführungsform nach den Fig. 1 bis 5 sind die Vorwärtsbewegungen und Rückwärtsbewegungen der Rakel nicht zeitlich so aufeinander abgestimmt, dass die Vorwärtsbewegung des einen Rakels der Rückwärtsbewegung des anderen Rakels entspricht.Such a powder coating booth is known from FIGS. 6 and 7 of DE-A-2219040. The cabin floor has the shape of two floor trays running parallel to each other in the longitudinal direction of the cabin, each with a suction shaft at the deepest tub location. There is a longitudinal squeegee on each side of the tub. The doctor blades are connected to each other by a transport chain, through which they are moved back and forth. During the advance movement, a squeegee is advanced in each floor trough from a starting position to the suction shaft designed as a powder collection device, while the other squeegee of the relevant trough is moved back from the suction shaft to a starting position. The squeegees graze on the cabin floor both during the forward movement and during the backward movement. 1 to 5 of the same document show an embodiment in which the squeegees are pivotally guided in slots in the cabin walls such that the squeegees only graze on the floor during the forward movement, but are pivoted into a position at the start of the backward movement, at which they are at a distance from the ground. In this embodiment according to FIGS. 1 to 5, the forward movements and backward movements of the doctor blade are not coordinated with one another in time so that the forward movement of one doctor blade corresponds to the backward movement of the other doctor blade.

Ferner ist aus der DE-B-2254458 eine Kabine zum Reinigen von Gegenständen durch Bestrahlen mit Sand oder Metallgranulat bekannt. Bei dieser Kabine sind beidseitig eines als Sammeleinrichtung dienenden Abzugsschlitzes, welcher sich quer durch die Kabine in Kabinenmitte erstreckt, jeweils mehrere Schlitten angeordnet, welche schwenkbare Rakel tragen und durch Kabelzüge vor- und zurückverschiebbar sind. Dabei gleiten die Rakel über einen zu reinigenden Boden unterhalb einer gitterartigen oder perforierten Arbeitsplattform, welche den eigentlichen Kabinenboden bildet. Die Rakel sind über Schwenkachsen mit den Schlitten schwenkbar verbunden. Die Achsen erstrecken sich quer zur Bewegungsrichtung und die Kabel sind durch Schlitze hindurchgeführt, die in den oberen Enden der Rakel gebildet sind. Dadurch werden die Rakel von Mitnehmern der Kabel während der Vorwärtsbewegung in eine untere Stellung zum Reinigen des Bodens geschwenkt, und bei der Rückwärtsbewegung werden die Rakel in eine vom Boden abgehobene Stellung geschwenkt.Furthermore, from DE-B-2254458 a cabin for cleaning objects by irradiation with sand or metal granules is known. In this cabin, a slide slot serving as a collecting device, which extends across the cabin in the middle of the cabin, is arranged on both sides, in each case a plurality of carriages, which carry swiveling squeegees and can be moved back and forth by cable pulls. The squeegees slide over a floor to be cleaned below a grid-like or perforated work platform, which forms the actual cabin floor. The squeegees are pivotally connected to the slide via swivel axes. The axes extend transversely to the direction of movement and the cables are passed through slots which are formed in the upper ends of the doctor blade. This causes the squeegees of carriers of the cables to be pivoted into a lower position for cleaning the floor during the forward movement, and during the backward movement the squeegees are pivoted into a position raised from the ground.

Durch die Erfindung soll die Aufgabe gelöst werden, die Pulverbeschichtungskabine so auszubilden, dass die zum Reinigen erforderlichen Stillstandszeiten oder Betriebsunterbrechungszeiten verkürzt werden.The object of the invention is to design the powder coating booth in such a way that the downtimes or downtimes required for cleaning are shortened.

Diese Aufgabe wird gemäss der Erfindung durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in the characterizing part of claim 1.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Eine Ausführungsform der Erfindung wird im folgenden mit Bezug auf die beiliegenden Zeichnungen als Beispiel beschrieben.. Darin zeigen:

  • Fig. 1 den unteren linken Teil einer Sprüh-Pulverbeschichtungskabine nach der Erfindung im Längsschnitt im wesentlichen längs der Ebene I-I von Fig. 4;
  • Fig. 2 den unteren mittleren Teil der Sprüh-Pulverbeschichtungskabine im Längsschnitt;
  • Fig. 3 den unteren rechten Teil der Sprüh-Pulverbeschichtungskabine von Fig. 1;
  • Fig. 4 einen Querschnitt durch den unteren Teil der Sprüh-Pulverbeschichtungskabine von Fig. 1 längs der Ebene IV-IV;
  • Fig. 5 einen Axialschnitt eines Details V von Fig.1.
An embodiment of the invention is described below with reference to the accompanying drawings as an example.
  • Figure 1 shows the lower left part of a spray powder coating booth according to the invention in longitudinal section substantially along the plane II of Fig. 4.
  • Figure 2 shows the lower middle part of the spray powder coating booth in longitudinal section.
  • Fig. 3 shows the lower right part of the spray powder coating booth of Fig. 1;
  • 4 shows a cross section through the lower part of the spray powder coating booth from FIG. 1 along the plane IV-IV;
  • 5 shows an axial section of a detail V from FIG. 1.

Fig. 1 zeigt eine Rakelschlitteneinheit 2 mit zwei Rakeln 4 und 6 in einer mit Bezug auf die Zeichnung nach links verschobenen Stellung im unteren linken Teil einer Pulverbeschichtungskabine 8 nach der Erfindung. Dabei befindet sich das in der Zeichnung links dargestellte Rakel 4 in seiner Ausgangsposition und das rechts dargestellte Rakel 6 über dem Pulversammelbereich 14, der durch eine Öffnung 14 im Kabinenboden 12 gebildet ist. Die Öffnung 14 befindet sich in der Mitte auf der halben Länge der Kabine 8 und erstreckt sich über die gesamte Breite des Kabinenbodens 1. Unter der Öffnung 14 befindet sich ein Sammelbehälter 16.1 shows a squeegee carriage unit 2 with two squeegees 4 and 6 in a position shifted to the left with reference to the drawing in the lower left part of a powder coating booth 8 according to the invention. The squeegee 4 shown on the left in the drawing is in its starting position and the squeegee 6 shown on the right is above the powder collection area 14, which is formed by an opening 14 in the cabin floor 12. The opening 14 is located in the middle on half the length of the cabin 8 and extends over the entire width of the cabin floor 1. Below the opening 14 there is a collecting container 16.

Die beiden Rakel 4 und 6 sind jeweils in einem Querträger 20 um eine in Kabinenquerrichtung verlaufende Achse 18 schwenkbar gelagert. Die Querträger 20 sind durch Längsträger 22 miteinander verbunden. Ein Antriebsstrang 24 enthält ein endloses Seil 26, welches über ausserhalb der Kabine 8 angeordnete Rollen 28 und 30 läuft, von welchen die eine Rolle 28 von einem Motor 32 angetrieben wird. Das Seil 26 ist durch einen in Fig. 4 gezeigten mittigen Schlitz 34 der Rakel 4 und 6 hindurchgeführt und auf jeder Seite dieser Rakel mit Mitnehmern 36 versehen. Diese Mitnehmer 36 sitzen auf einem Rohr 40, welches auf dem durch es hindurch geführten Seil 26 befestigt ist. Das vom Seil 26 gezogene Rakel - Rakel 6 in Fig. 1 - liegt jeweils an einem Anschlag 38 des Rakelträgers 20 an. Das in Vorwärtsrichtung zur Öffnung 14 gezogene Rakel 6 schiebt über den Längsträger 22 das andere Rakel 4 in Rückwärtsrichtung in seine in Fig. 1 gezeigte Ausgangsposition, wobei die Mitnehmer 36 des Seiles 26 dieses andere Rakel 4 in Rückwärtsrichtung vom Boden 12 weg nach oben in eine Ausser-Betriebs-Stellung schwenken. Die beiden Rakel 4 und 6 bewegen sich als Einheit 2 so lange nach links, bis entsprechend Fig. 1 das linke Rakel 4 einem an der linken Stirnwand 10 der Kabine 8 angeordneten induktiven Näherungsschalter 42 gegenüberliegt, der somit als Endschalter wirkt. Der Motor 32 zum Antrieb des Seiles 26 wird dann abgeschaltet oder umgeschaltet. Im letzteren Falle bewegt das Seil 26 die Rakelschlitteneinheit 2 von der in Fig. 1 gezeigten Stellung in Richtung des Pfeiles 44 nach rechts. Dabei wird zuerst durch die Mitnehmer 36 des Seiles 26 das rechte Rakel 6 in Richtung 44 seiner Rückwärtsbewegung entsprechend Fig. 2 in eine Ausser-Betriebs-Stellung geschwenkt, während das linke Rakel 4 in Richtung seiner Vorwärtsbewegung, welche gleich ist wie die genannte Rückwärtsbewegung 44 des anderen Rakels 6, nach unten gegen den Kabinenboden 12 in seine In-Betriebs-Stellung geschwenkt wird, bis es an seinem Anschlag 38 anliegt. Danach wird die gesamte Rakelschlitteneinheit 2 von den Mitnehmern 36, welche am linken Rakel 4 anliegen, in Vorwärtsrichtung 44 bewegt. Dabei haben die Rakel 4 und 6 die in den Fig. 2 und 3 gezeigten Stellungen und das linke Rakel 4 rakelt auf dem Boden 12 vorhandenes Pulver 48 in die Öffnung 14 und in den darunter befindlichen Sammelbehälter 16 entsprechend den Fig. 2 und 3.The two doctor blades 4 and 6 are each pivotally mounted in a cross member 20 about an axis 18 extending in the cabin transverse direction. The cross members 20 are connected to one another by longitudinal members 22. A drive train 24 contains an endless cable 26 which runs over rollers 28 and 30 arranged outside the cabin 8, of which one roller 28 is driven by a motor 32. The cable 26 is passed through a central slot 34 of the doctor blade 4 and 6 shown in FIG. 4 and is provided with drivers 36 on each side of this doctor blade. These drivers 36 sit on a tube 40 which is fastened on the rope 26 passed through it. The squeegee drawn by the cable 26 - squeegee 6 in FIG. 1 - lies against a stop 38 of the squeegee carrier 20. The squeegee 6 drawn in the forward direction to the opening 14 pushes the other squeegee 4 in the backward direction via the longitudinal member 22 its starting position shown in Fig. 1, the drivers 36 of the rope 26 pivot this other doctor blade 4 in the backward direction away from the floor 12 upwards into an out-of-operation position. The two squeegees 4 and 6 move as a unit 2 to the left until, according to FIG. 1, the left squeegee 4 is opposite an inductive proximity switch 42 arranged on the left end wall 10 of the cabin 8, which thus acts as a limit switch. The motor 32 for driving the cable 26 is then switched off or switched over. In the latter case, the cable 26 moves the squeegee carriage unit 2 to the right from the position shown in FIG. 1 in the direction of the arrow 44. First, the right squeegee 6 is pivoted in the direction 44 of its backward movement according to FIG. 2 into an out-of-operation position by the drivers 36 of the cable 26, while the left squeegee 4 in the direction of its forward movement, which is the same as the mentioned backward movement 44 of the other squeegee 6, is pivoted downward against the cabin floor 12 into its operating position until it abuts its stop 38. Thereafter, the entire squeegee carriage unit 2 is moved in the forward direction 44 by the drivers 36, which bear against the left squeegee 4. The squeegees 4 and 6 have the positions shown in FIGS. 2 and 3 and the left squeegee 4 squeegees powder 48 present on the floor 12 into the opening 14 and into the collecting container 16 underneath according to FIGS. 2 and 3.

Die Vorwärtsbewegung 44 des linken Rakels 4 dauert so lange an, bis es sich über der Öffnung 14 befindet, wobei gleichzeitig das rechte Rakel 6 seine in Fig. 3 gezeigte Endstellung erreicht und einem an der rechten Stirnwand 50 der Kabine angeordneten induktiven Näherungsschalter 52 gegenüberliegt. Nunmehr wird die Bewegungsrichtung des Seiles 26 umgekehrt, so dass das rechte Rakel 6 nunmehr von den Mitnehmern 36 nach unten gegen den Boden 12 in In-Betriebs- Stellung geschwenkt und in Vorwärtsrichtung entsprechend dem Pfeil 52 zur Öffnung 14 bewegt wird. Die Vorwärtsbewegung 52 des rechten Rakels 6 ist nunmehr gleichzeitig die Rückwärtsbewegungsrichtung des linken Rakels 4, welches von den Mitnehmern 36 in seine aus Fig. 1 ersichtliche Ausser-Betriebs-Stellung vom Boden 12 weg in Rückwärtsrichtung 52 nach oben geschwenkt und in der Richtung 52 zurück in die in Fig. 1 gezeigte Endstellung zurückbewegt wird.The forward movement 44 of the left squeegee 4 continues until it is above the opening 14, the right squeegee 6 simultaneously reaching its end position shown in FIG. 3 and opposite an inductive proximity switch 52 arranged on the right end wall 50 of the cabin. Now the direction of movement of the cable 26 is reversed, so that the right squeegee 6 is now pivoted downward by the drivers 36 against the floor 12 into the operating position and moved in the forward direction according to the arrow 52 to the opening 14. The forward movement 52 of the right squeegee 6 is now simultaneously the backward movement direction of the left squeegee 4, which in the inoperative position shown in FIG is moved back into the end position shown in Fig. 1.

Das Verschwenken der Rakel 4 und 6 und das Verschieben dieser beiden Rakel 4 und 6 über den Boden 12 zur Öffnung 14 und zurück in ihre Ausgangspositionen erfolgt also einzig und allein durch das Seil 26 über dessen Mitnehmer 36 und die Anschläge 38 der Rakelträger 20. Die Rakel 4 und 6 haben in Kabinenlängsrichtung einen Abstand voneinander, der ungefähr der halben Länge des Kabinenbodens 12 entspricht. Dadurch braucht jedes Rakel nur über die halbe Länge der Kabine bewegt zu werden. Die beiden Rakel 4 und 6 sind zu einer Einheit 2 zusammengefasst und werden von dem einzigen Seil 26 jeweils gemeinsam betätigt. Dadurch ist die gesamte Konstruktion sehr einfach. Die Umschaltung der Bewegungsrichtung des Seiles 12 erfolgt automatisch über die Endschalter 42 und 52, welche entsprechend dem Ausführungsbeispiel vorzugsweise als induktive Näherungsschalter ausgebildet sind.The pivoting of the squeegee 4 and 6 and the displacement of these two squeegees 4 and 6 over the floor 12 to the opening 14 and back into their starting positions is therefore solely by the rope 26 via its driver 36 and the stops 38 of the doctor blade carrier 20. Die Doctor blades 4 and 6 are at a distance from one another in the longitudinal direction of the cabin, which corresponds to approximately half the length of the cabin floor 12. This means that each squeegee only needs to be moved over half the length of the cabin. The two doctor blades 4 and 6 are combined to form a unit 2 and are each actuated together by the single rope 26. This makes the entire construction very simple. The direction of movement of the cable 12 is switched over automatically via the limit switches 42 and 52, which, according to the exemplary embodiment, are preferably designed as inductive proximity switches.

Zur Vermeidung von Pulveransammlungen an den Rakeln können diese Rakel 4 und 6 mit Gasdüsen 54 versehen sein, welche gegen den Boden 12 gerichtet und an eine Druckgasquelle 5 angeschlossen sind.In order to avoid powder accumulation on the doctor blades, these doctor blades 4 and 6 can be provided with gas nozzles 54 which are directed against the bottom 12 and are connected to a compressed gas source 5.

Wie aus Fig. 4 ersichtlich ist, erstreckt sich die Öffnung 14 über die gesamte Breite des Kabinenbodens 12. Die Rakel 4 und 6 können entsprechend dem in Fig. 4 gezeigten Rakel 6 mit einer aus anderem Material bestehenden Rakelkante 57 versehen sein. Die beide Rakel 4 und 6 tragende Rakelschlitteneinheit 2 ist auf beiden Längsseiten mit Gleitelementen 58 versehen, die auf Gleitschienen 60 der Kabinenseitenwände 62 sitzen und auf diesen in Kabinenlängsrichtung verschiebbar sind. Aus Fig. 4 ist auch ersichtlich, dass der Antriebsstrang 24 mit dem Seil 26 in der Mitte der Kabine in Kabinenlängsrichtung verläuft. Zur Vermeidung einer Verschmutzung des unterhalb des Kabinenbodens 12, jedoch durch den Behälter 16 verlaufenden unteren Trums 64 des Seils 12, ist es im Behälter 16 durch ein Rohr 66 hindurchgeführt.As can be seen from FIG. 4, the opening 14 extends over the entire width of the cabin floor 12. The doctor blades 4 and 6 can be provided with a doctor blade edge 57 made of a different material, corresponding to the doctor blade 6 shown in FIG. The doctor blade carriage unit 2, which carries both doctor blades 4 and 6, is provided on both longitudinal sides with sliding elements 58, which sit on slide rails 60 of the cabin side walls 62 and can be displaced thereon in the longitudinal direction of the cabin. 4 also shows that the drive train 24 runs with the cable 26 in the middle of the cabin in the longitudinal direction of the cabin. In order to avoid contamination of the lower run 64 of the cable 12 below the cabin floor 12 but through the container 16, it is passed through a pipe 66 in the container 16.

Wie die Fig. 1 und 3 zeigen, ist das obere Trum 70 des Seiles 26 durch die Stirnwände 10 und 50 der Kabine 8 hindurchgeführt. Dazu ist in den Stirnwänden jeweils eine enge Öffnung gebildet. Entsprechend der in Fig. 5 vergrössert im Schnitt dargestellten linken Stirnwand 10 von Fig. 1 ist die Öffnung jeweils durch einen Einsatz 76 gebildet, in welchem eine von der Wandaussenseite in Richtung zur Wandinnenseite sich verengende kegelförmige Bohrung 78 gebildet ist, durch welche das Seil 26 hindurchläuft. Eine ausserhalb der Stirnwand 10 angeordnete Gasdüse 80 ist über eine Leitung 82 an die in Fig. 1 gezeigte Druckgasquelle 56 angeschlossen und bläst innerhalb der sich verengenden Bohrung 78 Druckgas gegen das Seil 26. Dadurch wird am Seil 26 haftendes Pulver durch die Bohrung 78 hindurch am Kabel 26 vorbei in das Kabineninnere 83 geblasen.1 and 3 show, the upper run 70 of the rope 26 is passed through the end walls 10 and 50 of the cabin 8. For this purpose, a narrow opening is formed in the end walls. Corresponding to the left end wall 10 of FIG. 1 shown enlarged in section in FIG. 1, the opening is formed in each case by an insert 76 in which a conical bore 78 narrowing from the outside of the wall towards the inside of the wall is formed, through which the cable 26 runs through. A gas nozzle 80 arranged outside the end wall 10 is connected via a line 82 to the compressed gas source 56 shown in FIG. 1 and blows compressed gas against the cable 26 within the narrowing bore 78. As a result, powder adhering to the cable 26 passes through the bore 78 on Blown cable 26 over into the cabin interior 83.

Durch die Rakel 4 und 6 kann der Kabinenboden 12 ständig so sauber gehalten werden, dass sich keine übermässig grosse Menge an Pulver 40 ansammelt. Dadurch wird eine explosionsgefährlich hohe Ansammlung von Pulver vermieden und die Kabine kann schneller gereinigt werden, wenn von einer auf eine andere Pulversorte gewechselt werden soll. Dabei kann die Rakelschlitteneinheit 2 auf einfache Weise von den Gleitschienen 60 der Kabine abgehoben und gegen eine andere Rakelschlitteneinheit ausgetauscht werden, so dass keine Betriebsstillstandszeiten zum Reinigen der Rakelschlitteneinheit anfallen.With the doctor blade 4 and 6, the cabin floor 12 can always be kept so clean that an excessively large amount of powder 40 does not accumulate. This prevents an explosively high accumulation of powder and the booth can be cleaned more quickly if you want to change from one type of powder to another. The squeegee carriage unit 2 can be easily lifted off the slide rails 60 of the cabin and exchanged for another squeegee carriage unit, so that there are no downtimes for cleaning the squeegee carriage unit.

Durch die durch die Bohrung 78 in das Kabineninnere 83 gerichtete Gasdüse 80 wird das Seil 26 ständig sauber gehalten und ein Austreten von Pulver aus der Kabine heraus vermieden.The gas nozzle 80, which is directed through the bore 78 into the interior 83 of the cabin, keeps the cable 26 constantly clean and prevents powder from escaping from the cabin.

Anstelle eines Seiles 26 kann für den Antriebsstrang 24 auch eine Kette oder wechselweise beaufschlagte Hubkolben oder geeignete andere bekannte Antriebseinrichtung verwendet werden. Am einfachsten ist jedoch ein Seil oder eine Kette.Instead of a cable 26, a chain or alternately loaded reciprocating pistons or suitable other known drive devices can also be used for the drive train 24. However, the simplest is a rope or a chain.

Claims (3)

1. Powder coating cabin having a cabin floor, a powder collection device (14) on the cabin floor, two doctor blades (4, 6) spaced one behind the other for wiping powder off the cabin floor into the powder collection device, which is disposed between the blades and a drive line (24) pulling the blades for the joint forward and backward movement of the blades, during the forward movement of one of the blades from an initial position towards the powder collection device the other blade being moved back from the powder collection device into its initial position, characterized in that the powder collection device (14) is disposed on half the length of the cabin floor (12) and extends at right angles over it, in that the distance between the two blades (4, 6) corresponds roughly to half the length of the cabin floor, in that the two blades (4, 6) are pivoted on a joint carriage (2) around axes (18) which run at right angles to the direction of motion of the drive line (24), in that the carriage (2) can move on guide rails (60) and the blades (4, 6) each have one slot (34) through which the drive line (24) is guided so that the carriage (2) is separated from the drive line (24) and can be raised from the guide rails (60), and in that the drive line (24) has carriers (36) which in the direction of the drive line (24) about against the blades (4, 6) and at the beginning of their forward movement towards the cabin floor (12) these blades swing into an operating position and at the beginning of their backward movement away from the cabin floor (12) they swing into an inoperative position.
2. Powder coating cabin according to claim 1, characterized in that in at least one cabin wall there is formed an aperture (78) for leading away the drive line (24), and in that a gas jet (80) is directed against the path of movement of the drive line in the aperture substantially in the direction of the wall surface in the interior of the cabin (83).
3. Powder coating cabin according to claim 1 or 2, characterized in that the blades (4, 6) are provided with gas jets (54), which are directed towards the cabin floor (12).
EP85102871A 1984-04-02 1985-03-13 Enclosure for powder coating Expired EP0160810B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102871T ATE33565T1 (en) 1984-04-02 1985-03-13 POWDER COATING BOOTH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3412275 1984-04-02
DE3412275A DE3412275C2 (en) 1984-04-02 1984-04-02 Powder coating booth

Publications (2)

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EP0160810A1 EP0160810A1 (en) 1985-11-13
EP0160810B1 true EP0160810B1 (en) 1988-04-20

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ID=6232394

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EP85102871A Expired EP0160810B1 (en) 1984-04-02 1985-03-13 Enclosure for powder coating

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US (1) US4764220A (en)
EP (1) EP0160810B1 (en)
JP (1) JPS60212266A (en)
AT (1) ATE33565T1 (en)
DE (1) DE3412275C2 (en)
ES (1) ES8606031A1 (en)

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FR2675061B1 (en) * 1991-04-12 1993-07-16 Sames Sa POWDER COATING CABINET.
US5259879A (en) * 1991-06-27 1993-11-09 Ransburg Corporation Powder application booth liner and method of making it
US5199989A (en) * 1991-07-31 1993-04-06 Ransburg Corporation Powder booth floor wiping mechanism
DE4200298A1 (en) * 1992-01-09 1993-07-15 Gerhard Schaber BALL FOR SPRAY MIST EXTRACTION SYSTEMS
DE9203366U1 (en) * 1992-03-10 1992-08-27 Farb-Tec Gesellschaft Fuer Beschichtungskabinen Systeme Mbh, 2000 Hamburg, De
DE9203367U1 (en) * 1992-03-10 1992-08-27 Farb-Tec Gesellschaft Fuer Beschichtungskabinen Systeme Mbh, 2000 Hamburg, De
DE4413347A1 (en) * 1994-04-18 1995-10-26 Boellhoff Verfahrenstech Powder coating booth
DE4417727A1 (en) * 1994-05-20 1995-11-23 Gema Volstatic Ag Hose brush for pipelines in powder spray-coating plants
DE4424662C2 (en) * 1994-07-14 1999-02-04 Eisenmann Kg Maschbau Floor clearers for powder booths
US5833751A (en) * 1996-10-18 1998-11-10 Hoosier Fiberglass Industries, Inc Powder coating booth having smooth internal surfaces
JP5245089B2 (en) * 2008-06-26 2013-07-24 高周波熱錬株式会社 Steel bar coating equipment
CN104889086B (en) * 2014-03-07 2019-03-01 日东电工株式会社 The liquid removing device of optical film
CN109909197B (en) * 2019-03-04 2021-06-11 中冶京诚工程技术有限公司 Floating cleaning device for powder on back surface of plate strip sprayed coating and electrostatic powder spraying device
CN113058812B (en) * 2021-03-31 2022-12-30 上汽通用五菱汽车股份有限公司 Spraying device for automobile skirt glue

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Also Published As

Publication number Publication date
ES8606031A1 (en) 1986-04-16
EP0160810A1 (en) 1985-11-13
JPS60212266A (en) 1985-10-24
DE3412275A1 (en) 1985-10-03
DE3412275C2 (en) 1986-10-30
ATE33565T1 (en) 1988-05-15
ES541081A0 (en) 1986-04-16
US4764220A (en) 1988-08-16

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