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EP0490189A1 - Blast installation for blasting the surface of sheet metal, sections or the like - Google Patents

Blast installation for blasting the surface of sheet metal, sections or the like Download PDF

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Publication number
EP0490189A1
EP0490189A1 EP91120534A EP91120534A EP0490189A1 EP 0490189 A1 EP0490189 A1 EP 0490189A1 EP 91120534 A EP91120534 A EP 91120534A EP 91120534 A EP91120534 A EP 91120534A EP 0490189 A1 EP0490189 A1 EP 0490189A1
Authority
EP
European Patent Office
Prior art keywords
blasting
jet
wedge
guide
guide plate
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
EP91120534A
Other languages
German (de)
French (fr)
Other versions
EP0490189B1 (en
Inventor
Hans-Jürgen Mügge
Wolfgang Heiss
Bernhard Stefan Anton Neumaier
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.)
Badische Maschinenfabrik GmbH
BMD Badische Maschinenfabrik Durlach GmbH
Original Assignee
Badische Maschinenfabrik GmbH
BMD Badische Maschinenfabrik Durlach 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 Badische Maschinenfabrik GmbH, BMD Badische Maschinenfabrik Durlach GmbH filed Critical Badische Maschinenfabrik GmbH
Publication of EP0490189A1 publication Critical patent/EP0490189A1/en
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Publication of EP0490189B1 publication Critical patent/EP0490189B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/10—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
    • B24C3/14—Apparatus using impellers

Definitions

  • the invention relates to a blasting system for blasting the surface of workpieces, such as sheets, profiles or the like, which are elongated in at least one direction of expansion, comprising a blasting cubicle with at least one blast wheel for accelerating the blasting agent and a conveying device which moves the workpieces through the blasting cubicle below the centrifugal wheel and with a deflection device which influences the direction of the blasting agent jet after it emerges from the centrifugal wheel.
  • blasting workpieces When blasting workpieces, different goals are pursued depending on their type. If the workpieces are castings, remnants of mold material, burrs etc. are removed by blasting. If, on the other hand, it is sheet metal, profiles or steel structures, it is usually scale, rust, welding slag od. To remove.
  • the blasting In the case of workpieces that are relatively long at least in one direction of expansion, such as sheets, strips, profiles, but also steel structures, the blasting is generally carried out in a continuous process, in which the workpieces or the semifinished product is transported on a conveyor through a blasting cabinet and during the transport movement by means of the blast wheels, which are arranged in a fixed position in the blasting cabin, are blasted. The same applies to the blasting of round profiles, wires or the like.
  • the blast wheels of a blasting system always deliver the blasting medium in a certain direction and with a certain beam angle (beam opening angle).
  • beam angle beam opening angle
  • these two parameters are decisive for the quality of the surface treatment. If the jet angle and / or the distance of the workpiece from the centrifugal wheel is too large, the surface density of the particles hitting the surface may be too low, so that the surface is not hit by a sufficient number of particles. If the beam direction is unfavorable in relation to the surface, the impulse forces acting on the surface are reduced. In many cases, therefore, a perpendicular impact of the particles on the surface is desired.
  • leading and trailing end faces have to be machined, which are generally in the direction of the abrasive jet, with the result that they are not blasted or are blasted only inadequately.
  • the invention is based on the object of designing a blasting system of the structure mentioned at the outset in such a way that any elongated workpieces such as sheets, profiles, steel structures or the like can be blasted effectively and on all sides.
  • the deflection device has at least two guide elements, which can optionally be moved into the abrasive jet in such a way that one guide element directs the abrasive jet in the direction of the movement of the conveying device, the other guide element the abrasive jet against the direction of movement distracts the conveyor.
  • the deflection device designed according to the invention has two deflection elements.
  • the one guide element which projects obliquely into the blasting medium jet, the latter can be deflected in one direction.
  • the deflection takes place in the direction of the running of the conveyor.
  • This guide element is used in particular for the treatment of the surfaces of sheets, profiles and steel structures facing the centrifugal wheel. Due to the deflection of the blasting agent jet in the conveying direction, the blasting agent is also reflected in the conveying direction when it hits the surface and consequently cannot deposit on surface areas which only subsequently enter the blasting agent jet. In this way, it is prevented that reflective abrasive is deposited and built up on trailing surfaces of the workpiece and in this way hinders the blasting of the surface. Furthermore, this guide member is suitable for blasting the trailing end faces of the workpiece, while the other guide member for treating the leading end faces can be moved into the blasting agent jet.
  • the guide members are positively coupled and can be moved in the abrasive jet by translatory or rotary means.
  • the deflection device can also have a further position in which none of the guide members is effective.
  • An embodiment of the invention is characterized in that the two guide members are formed by a deflecting wedge, the wedge tip is aligned with the centrifugal wheel and the one wedge surface of the blasting agent jet in one direction and the other wedge surface after moving in the blasting agent jet in the other Distracts direction.
  • one wedge surface serves for blasting the surface facing the centrifugal wheels and the trailing end surfaces of the workpiece, while the other wedge surface deflects the beam onto the leading end surfaces.
  • This exemplary embodiment can also be modified in that the deflecting wedge can be moved with respect to the blasting agent jet in such a way that only one of the wedge faces is effective in each case, or in a middle position both wedge faces are effective as guide members and deflect the blasting agent jet to both sides.
  • both guide members are designed as guide plates which are coupled to one another in such a way that when one guide plate is moved into the steel center jet, the other guide plate comes into an ineffective position.
  • a preferred embodiment is characterized in that the one guide member deflects the blasting agent jet in the direction of the movement of the conveyor, the other guide member is a deflecting wedge which divides and deflects the blasting agent jet on both sides according to the wedge angle.
  • the guide plate ensures the blasting of the surfaces facing the centrifugal wheels and the trailing end faces of the workpieces. Since this guide element is subject to a considerably longer operating time and therefore wears out more quickly, it is designed as a simple plate which can be replaced simply and inexpensively. Due to the wedge, which can optionally be moved into the blasting agent jet, the blasting agent is deflected on both sides according to the wedge angle. With this wedge it is possible in particular to radiate the leading and trailing end faces of a profile, a steel structure or the like in a continuous process.
  • the deflection device has a pivot axis which extends transversely to the blasting agent jet and is laterally offset with respect to it, on one side and parallel to it the guide plate and on the opposite side of which the deflection wedge extending parallel to it is arranged.
  • a pivoting movement is preferably provided by means of the aforementioned pivot axis, on the two sides of which the guide plate and the wedge are arranged, both of which extend parallel to the pivot axis and influence the beam over its entire width .
  • one or the other mode of operation provides that in one position of the pivot axis the guide plate protrudes obliquely from the side into the blasting agent jet, while in a position rotated by 180 degrees the deflecting wedge with its axis approximately in the axis of the blasting agent jet is arranged.
  • a particularly simple design in terms of construction and functionality results from the fact that the guide plate and the deflection wedge are connected via web plates to form a structural unit which is fastened to the swivel axis.
  • the blasting system shown in FIG. 1 has an elongated blasting cubicle 1, in which a conveyor device 2 is arranged, which continues in front of and behind the blasting cubicle 1.
  • the conveyor 2 can be a roller conveyor, for example.
  • a plurality of centrifugal wheels 3 are arranged, the blasting medium jet of which is directed downwards in a fan-like manner.
  • centrifugal wheels 4 are arranged in the lower region, the blasting medium jet of which is directed upwards in a fan-like manner.
  • the bottom 6 of the blasting cabinet 1 is tapered downwards in a trough-shaped manner in order to feed the blasting agent used to a conveyor 7 for recycling into the blasting process.
  • the blasting cabin 1 is equipped with an air / dust extraction 8. The air is also processed in the system parts shown on the right.
  • the surfaces and side surfaces of the workpiece which are exposed at the top are blasted by the upper centrifugal wheels 3, while the surfaces facing downwards and also the side surfaces are treated by the lower centrifugal wheels.
  • the blasting agent is reflected to the side due to the obliquely directed blasting agent jets and reaches the screw conveyor 7 via the funnel-shaped bottom 6.
  • the abrasive remains on the semi-finished product or workpiece, it is blown off at the end of the conveyor line and returned via the screw conveyor.
  • a deflection device In order to avoid that the blasting agent is reflected on the surface against the conveying direction and remains on the workpiece in the case of metal sheets, in particular also in the case of profiles and elongated steel structures, a deflection device, not shown in FIG. 1, is provided.
  • FIG. 2 shows a workpiece 9 in the form of an elongated double T profile 10, which is passed through the blasting cabinet 1 in the direction of the arrow 11.
  • an upper, fixed centrifugal wheel 3 is indicated schematically and different positions of the workpiece 9 relative to the centrifugal wheels in dash-dotted lines 3.
  • one of the lower centrifugal wheels 4 is indicated by dash-dotted lines.
  • the deflection device 15 assigned to the upper centrifugal wheels 3 has a deflection wedge 12 as one of the guide members and a guide plate 13 as another guide member, which can be moved selectively and positively coupled into the blasting agent jet 14.
  • the wedge 12 directs the blasting medium jet 14 to both sides in accordance with the wedge angle, i.e. in and against the conveying direction, while the guide plate 13 deflects the abrasive jet 14 only in the conveying direction 11.
  • the wedge 12 of the deflection device is initially in the blasting medium jet 14, so that the leading end face 16 of the workpiece 9 is processed by the one partial jet 17.
  • the guide plate 13 is introduced into the blasting agent jet 14, which generates a jet 18 oriented in this direction due to its inclination in the conveying direction 11.
  • the abrasive that strikes the surface - in the embodiment shown into the channel-shaped profile of the double-T support 10 - is consequently reflected in the conveying direction 11 and cannot be deposited on the surface behind the jet 18 against the conveying direction.
  • the wedge 12 is again brought into the blasting agent jet 14, so that the other partial jet 20 generated by it hits the trailing end face 19.
  • FIGS. 3 and 4 An embodiment of the deflection device 15 is shown in more detail in FIGS. 3 and 4. Below the case of the centrifugal wheel 3 (see FIG. 3), the deflection device 15 is arranged, which, as already described, has a deflection wedge 12 and a guide plate 13.
  • the wedge 12 and the guide plate 13 are arranged on both sides of a common pivot axis 21, which in turn runs below the exit of the blasting agent jet 14 and transversely thereto. As shown in FIG. 4, it is supported at its two ends in bearings 22 of the casing of the centrifugal wheel.
  • the wedge 12 and the guide plate 13 are detachably connected to one another via web plates 23 and screw connections 24. In this way, they form a structural unit which can be pivoted by means of the pivot axis 21.
  • a hand lever 25 or an output can serve this purpose. Because of the screw connection 24, either the wedge 12 or the guide plate 13 can be replaced.
  • FIG. 3 shows an operating position of the deflection device 15, in which the guide plate 13 is located in the blasting agent jet 14 and deflects it into a jet 18, as is shown in the middle position in FIG. 2.
  • the hand lever 15 By pivoting the hand lever 15 from the solid position shown on the left into the dash-dotted position shown on the right, the wedge 12 is pivoted into the position 12, in which it is located approximately in the middle of the blasting agent jet 14 and this corresponds to the left and right position in FIG 2 divides and distracts.
  • the guide plate 13 is located outside the blasting agent jet and approximately in the position in which the wedge 12 was previously.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Spray Control Apparatus (AREA)

Abstract

A blast installation for blasting the surface of workpieces (9) elongated in at least one extension direction, e.g. sheet metal, sections, steel structures or the like, has a blasting booth (1) with at least one centrifugal wheel (3) for accelerating the blasting agent and a conveying device (7) moving the workpieces (9) through the blasting booth (1) under the centrifugal wheel (3) as well as a deflecting device (15) influencing the direction of the blasting-agent jet (14) after its discharge from the centrifugal wheel. In order to effectively blast workpieces (9) of any construction on all surfaces and to avoid the depositing of blasting agent at undesirable locations, it is proposed that the deflecting device (15) have at least two guide members (12, 13) which can alternatively be moved into the blasting-agent jet (14) in such a way that one guide member deflects the blasting-agent jet (14) in the direction of movement of the conveying device (11), and the other guide member deflects the blasting-agent jet (14) against the direction of movement of the conveying device (11). <IMAGE>

Description

Die Erfindung betrifft eine Strahlanlage zum Strahlen der Oberfläche von wenigstens in einer Ausdehnungsrichtung langgestreckten Werkstücken, wie Bleche, Profile od. dgl., mit einer Strahlkabine mit wenigstens einem Schleuderrad zum Beschleunigen des Strahlmittels und einer die Werkstücke durch die Strahlkabine unterhalb des Schleuderrades hindurch bewegenden Fördereinrichtung sowie mit einer die Richtung des Strahlmittelstrahls nach seinem Austritt aus dem Schleuderrad beeinflussenden Ablenkeinrichtung.The invention relates to a blasting system for blasting the surface of workpieces, such as sheets, profiles or the like, which are elongated in at least one direction of expansion, comprising a blasting cubicle with at least one blast wheel for accelerating the blasting agent and a conveying device which moves the workpieces through the blasting cubicle below the centrifugal wheel and with a deflection device which influences the direction of the blasting agent jet after it emerges from the centrifugal wheel.

Beim Strahlen von Werkstücken werden je nach deren Art verschiedene Ziele verfolgt. Handelt es sich bei den Werkstücken um Gußstücke, so werden durch das Strahlen anhaftende Formstoffreste, Grate etc. entfernt. Handelt es sich hingegen um Bleche, Profile oder Stahlkonstruktionen, so sind im allgemeinen Zunder, Rost, Schweißschlacke od. dgl. zu entfernen. Bei Werkstücken, die zumindest in einer Ausdehnungsrichtung relativ lang sind, wie Bleche, Bänder, Profile, aber auch Stahlkonstruktionen geschieht das Strahlen im allgemeinen im Durchlaufverfahren, indem die Werkstücke bzw. das Halbzeug auf einer Fördereinrichtung durch eine Strahlkabine transportiert wird und während der Transportbewegung mittels der in der Strahlkabine ortfest angeordneten Schleuderräder gestrahlt wird. Ähnliches gilt für das Strahlen von Rundprofilen, Drähten od. dgl.When blasting workpieces, different goals are pursued depending on their type. If the workpieces are castings, remnants of mold material, burrs etc. are removed by blasting. If, on the other hand, it is sheet metal, profiles or steel structures, it is usually scale, rust, welding slag od. To remove. In the case of workpieces that are relatively long at least in one direction of expansion, such as sheets, strips, profiles, but also steel structures, the blasting is generally carried out in a continuous process, in which the workpieces or the semifinished product is transported on a conveyor through a blasting cabinet and during the transport movement by means of the blast wheels, which are arranged in a fixed position in the blasting cabin, are blasted. The same applies to the blasting of round profiles, wires or the like.

Die Schleuderräder einer Strahlanlage geben das Strahmittel stets in einer bestimmten Richtung und mit einem bestimmten Strahlwinkel (Öffnungswinkel des Strahls) ab. Diese beiden Parameter sind - neben der Geschwindigkeit des Strahlmittels - maßgeblich für die Güte der Oberflächenbehandlung. Ist der Strahlwinkel und/oder der Abstand des Werkstücks vom Schleuderrad zu groß, kann die Flächendichte der auf die Oberfläche auftreffenden Partikel unter Umständen zu gering werden, so daß die Oberfläche nicht von ausreichend vielen Partikeln getroffen wird. Ist die Strahlrichtung gegenüber der Oberfläche ungünstig, so verringern sich die auf die Oberfläche wirkenden Impulskräfte. In vielen Fällen wird deshalb ein senkrechtes Auftreffen der Partikel auf die Oberfläche gewünscht. Dies aber kann dazu führen, daß das Strahlmittel sowohl in, als auch entgegen der Förderrichtung reflektiert wird und sich dadurch auch in dem nachlaufenden Bereich des Werkstücks ablagert und aufstaut und somit dessen Oberfäche beim Durchlauf durch den Strahl abdeckt. Dies gilt für Bleche, insbesondere aber für nach oben offene Profile, bei denen das Strahlmittel auch zur Seite nicht ausweichen kann.The blast wheels of a blasting system always deliver the blasting medium in a certain direction and with a certain beam angle (beam opening angle). In addition to the speed of the blasting medium, these two parameters are decisive for the quality of the surface treatment. If the jet angle and / or the distance of the workpiece from the centrifugal wheel is too large, the surface density of the particles hitting the surface may be too low, so that the surface is not hit by a sufficient number of particles. If the beam direction is unfavorable in relation to the surface, the impulse forces acting on the surface are reduced. In many cases, therefore, a perpendicular impact of the particles on the surface is desired. However, this can lead to the blasting agent being reflected both in and against the conveying direction and thus also being deposited and dammed up in the trailing area of the workpiece and thus covering its surface as it passes through the beam. This applies to metal sheets, but in particular to profiles that are open at the top and in which the blasting agent cannot escape to the side.

Schließlich sind bei Profilen und vor allem bei Stahlkonstruktionen die vor- und nachlaufenden Stirnseiten zu bearbeiten, die in der Regel in der Richtung des Strahlmittelstrahls liegen mit der Folge, daß sie nicht oder nur völlig unzureichend gestrahlt werden.Finally, in the case of profiles and, above all, in steel structures, the leading and trailing end faces have to be machined, which are generally in the direction of the abrasive jet, with the result that they are not blasted or are blasted only inadequately.

Es ist deshalb für Bleche und Profile bereits vorgeschlagen worden, den Strahlmittelstrahl zu verlagern, indem die Schleuderräder an zur Drehachse parallelen Schwenkachsen gelagert sind (CH-PS 447 864), so daß durch Schwenken der Schleuderräder sich der Auftreffwinkel des Strahlmittelstrahls verändert. Werden zwei gegeneinander wirkende Schleuderräder verwendet, so läßt sich die Auftrefffläche einengen oder erweitern. Damit ist aber in erster Linie nur eine Anpassung an die Flächenausdehnung des Werkstücks möglich, um beispielsweise Bleche, Bänder oder Flachprofile zu strahlen. Die vorgenannten nachteiligen Effekte lassen sich dadurch nicht oder nur sehr begrenzt beheben.It has therefore already been proposed for sheet metal and profiles to shift the blasting agent jet by mounting the centrifugal wheels on pivot axes parallel to the axis of rotation (CH-PS 447 864), so that the angle of incidence of the blasting agent jet changes due to pivoting of the centrifugal wheels. If two opposing centrifugal wheels are used, the impact surface can be narrowed or expanded. In the first place, however, this is only possible to adapt to the surface area of the workpiece, for example to blast sheets, strips or flat profiles. As a result, the aforementioned disadvantageous effects cannot be eliminated or can only be eliminated to a very limited extent.

Es ist ferner für das Strahlen von Drähten bekannt (DE-OS 18 15 187), den relativ breiten Strahlmittelstrahl durch eine Ablenkeinrichtung auf den vergleichsweise dünnen Durchmesser eines Drahtes zu konzentrieren. Hierfür sind von beiden Seiten in den strahlmittelstrahl schräg hineinragende Bleche vorgesehen, deren Öffnungswinkel variiert werden kann. Hierbei geht es jedoch ausschließlich um das Konzentrieren des Strahlmittelstrahls, hingegen lassen sich die vorgenannten Effekte bei langgestreckten Bauteilen und Blechen oder Bändern nicht beseitigen.It is also known for the blasting of wires (DE-OS 18 15 187) to concentrate the relatively broad abrasive jet by means of a deflection device on the comparatively thin diameter of a wire. For this purpose, sheets protruding obliquely from both sides into the blasting medium jet are provided, the opening angle of which can be varied. However, this is only about concentrating the blasting agent jet, however, the aforementioned effects cannot be eliminated with elongated components and sheets or strips.

Der Erfindung liegt die Aufgabe zugrunde, eine Strahlanlage des eingangs genannten Aufbaus so auszubilden, daß beliebige langgestreckte Werkstücke, wie Bleche, Profile, Stahlkonstruktionen od. dgl. allseitig und wirksam gestrahlt werden können.The invention is based on the object of designing a blasting system of the structure mentioned at the outset in such a way that any elongated workpieces such as sheets, profiles, steel structures or the like can be blasted effectively and on all sides.

Ausgehend von der eingangs genannten Strahlanlage wird diese Aufgabe dadurch gelöst, daß die Ablenkeinrichtung wenigstens zwei Leitorgane aufweist, die wahlweise in den Strahlmittelstrahl derart bewegbar sind, daß das eine Leitorgan den Strahlmittelstrahl in Richtung der Bewegung der Fördereinrichtung, das andere Leitorgan den Strahlmittelstrahl entgegen der Bewegungsrichtung der Fördereinrichtung ablenkt.Starting from the abrasive system mentioned at the outset, this object is achieved in that the deflection device has at least two guide elements, which can optionally be moved into the abrasive jet in such a way that one guide element directs the abrasive jet in the direction of the movement of the conveying device, the other guide element the abrasive jet against the direction of movement distracts the conveyor.

Die erfindungsgemäß ausgebildete Ablenkeinrichtung weist zwei Ablenkelemente auf. Mittels des einen Leitorgans, das schräg in den Strahlmittelstrahl hineinragt, läßt sich dieser nach einer Richtung ablenken. Die Ablenkung erfolgt dabei in Richtung des Laufs der Fördereinrichtung. Dieses Leitorgan wird insbesondere zur Behandlung der dem Schleuderrad zugekehrten Oberflächen von Blechen, Profilen und Stahlkonstruktionen eingesetzt. Durch die Ablenkung des Strahlmittelstrahls in Förderrichtung wird das Strahlmittel beim Aufprall auf die Oberfläche gleichfalls in Förderrichtung reflektiert und kann sich folglich nicht auf Oberflächenbereichen ablagern, die erst nachfolgend in den Strahlmittelstrahl gelangen. Auf diese Weise wird verhindert, daß sich reflektierendes Strahlmittel auf nachlaufenden Oberflächen des Werkstücks ablagert und aufstaut und auf diese Weise das Strahlen der Oberfläche behindert. Ferner eignet sich dieses Leitorgan zum Strahlen der nachlaufenden Stirnflächen des Werkstücks, während das andere Leitorgan zum Behandeln der vorlaufenden Stirnflächen in den Strahlmittelstrahl bewegbar ist.The deflection device designed according to the invention has two deflection elements. By means of the one guide element, which projects obliquely into the blasting medium jet, the latter can be deflected in one direction. The deflection takes place in the direction of the running of the conveyor. This guide element is used in particular for the treatment of the surfaces of sheets, profiles and steel structures facing the centrifugal wheel. Due to the deflection of the blasting agent jet in the conveying direction, the blasting agent is also reflected in the conveying direction when it hits the surface and consequently cannot deposit on surface areas which only subsequently enter the blasting agent jet. In this way, it is prevented that reflective abrasive is deposited and built up on trailing surfaces of the workpiece and in this way hinders the blasting of the surface. Furthermore, this guide member is suitable for blasting the trailing end faces of the workpiece, while the other guide member for treating the leading end faces can be moved into the blasting agent jet.

In bevorzugter Ausführung ist vorgesehen, daß die Leitorgane zwangsgekoppelt und translatorisch oder rotatorisch in den Strahlmittelstrahl bewegbar sind.In a preferred embodiment it is provided that the guide members are positively coupled and can be moved in the abrasive jet by translatory or rotary means.

Wird bei dieser Ausführungsform das eine Leitorgan in den Strahlmittelstahl bewegt, wandert das andere aus dem Strahl heraus. Im Bedarfsfall kann die Ablenkeinrichtung auch noch eine weitere Position aufweisen, in der keines der Leitorgane wirksam ist.In this embodiment, if one guide element is moved into the blasting agent steel, the other migrates out of the jet. If necessary, the deflection device can also have a further position in which none of the guide members is effective.

Ein Ausführungsbeispiel der Erfindung zeichnet sich dadurch aus, daß die beiden Leitorgane von einem Ablenkkeil gebildet sind, dessen Keilspitze zum Schleuderrad ausgerichtet ist und dessen eine Keilfläche den Strahlmittelstrahl in der einen Richtung und dessen andere Keil fläche nach dem Bewegen in den Strahlmittelstrahl diesen in die andere Richtung ablenkt.An embodiment of the invention is characterized in that the two guide members are formed by a deflecting wedge, the wedge tip is aligned with the centrifugal wheel and the one wedge surface of the blasting agent jet in one direction and the other wedge surface after moving in the blasting agent jet in the other Distracts direction.

Bei diesem Ausführungsbeispiel dient eine Keilfläche zum Strahlen der den Schleuderrädern zugekehrten Oberfläche und der nachlaufenden Stirnflächen des Werkstücks, während die andere Keilfläche den Strahl auf die vorlaufenden Stirnflächen ablenkt.In this exemplary embodiment, one wedge surface serves for blasting the surface facing the centrifugal wheels and the trailing end surfaces of the workpiece, while the other wedge surface deflects the beam onto the leading end surfaces.

Dieses Ausführungsbeispiel kann noch dadurch abgewandelt werden, daß der Ablenkkeil bezüglich des Strahlmittelstrahls derart bewegbar ist, daß nur jeweils eine der Keilflächen wirksam ist oder aber in einer mittleren Stellung beide Keilflächen als Leitorgane wirksam sind und den Strahlmittelstrahl nach beiden Seiten ablenken.This exemplary embodiment can also be modified in that the deflecting wedge can be moved with respect to the blasting agent jet in such a way that only one of the wedge faces is effective in each case, or in a middle position both wedge faces are effective as guide members and deflect the blasting agent jet to both sides.

Gemäß einer anderen Ausführungsform ist vorgesehen, daß beide Leitorgane als Leitplatten ausgebildet sind, die so miteinander gekoppelt sind, daß beim Bewegen der einen Leitplatte in den Stahlmittelstrahl die andere Leitplatte in eine unwirksame Lage gelangt.According to another embodiment, it is provided that both guide members are designed as guide plates which are coupled to one another in such a way that when one guide plate is moved into the steel center jet, the other guide plate comes into an ineffective position.

Eine bevorzugte Ausführungsform zeichnet sich dadurch aus, daß das eine Leitorgan eine den Strahlmittelstrahl in Richtung der Bewegung der Fördereinrichtung ablenkende Leitplatte, das andere Leitorgan ein Ablenkkeil ist, der den Strahlmittelstrahl nach beiden Seiten entsprechend dem Keilwinkel aufteilt und ablenkt.A preferred embodiment is characterized in that the one guide member deflects the blasting agent jet in the direction of the movement of the conveyor, the other guide member is a deflecting wedge which divides and deflects the blasting agent jet on both sides according to the wedge angle.

Bei dieser Ausführungsform besorgt die Leitplatte das Strahlen der den Schleuderrädern zugekehrten Oberflächen und der nachlaufenden Stirnflächen der Werkstücke. Da dieses Leitorgan einer wesentlich längeren Betriebsdauer unterworfen ist und daher schneller verschleißt, ist es als einfache Platte ausgebildet, die sich einfach und kostengünstig austauschen läßt. Durch den weiterhin wahlweise in den Strahlmittelstrahl bewegbaren Keil wird das Strahlmittel nach beiden Seiten entsprechend dem Keilwinkel abgelenkt. Mit diesem Keil ist es insbesondere möglich, die vorlaufenden und die nachlaufenden Stirnseiten eines Profils, einer Stahlkonstruktion od. dgl. im Durchlaufverfahren zu strahlen. Für die Betriebsweise der erfindungsgemäß ausgebildeten Strahlanlage bedeutet dies, daß beim Zuführen eines Profils, einer Stahlkonstruktion od. dgl. zunächst der Ablenkkeil in Wirkstellung gebracht wird, um die vorlaufende Stirnseite zu strahlen. Anschließend wird der Keil aus dem Strahlmittelstrahl herausbewegt und die Leitplatte hineingefahren, um die Oberfläche des Profils, der Stahlkonstruktion od. dgl. zu strahlen. Erreicht das Werkstück mit seinem nachlaufenden Ende den Strahlmittelstrahl, so kann entweder die Leitplatte im Strahl verbleiben, da sie den Strahl von hinten auf das Werkstück lenkt, oder aber der Keil in den Strahl bewegt werden. Ist hingegen lediglich ein Blech oder Band zu behandeln, so bedient man sich ausschließlich der Leitplatte. Auf diese Weise wird eine universell einsetzbare und für jede Art von Werkstück optimal arbeitende Strahlanlage geschaffen.In this embodiment, the guide plate ensures the blasting of the surfaces facing the centrifugal wheels and the trailing end faces of the workpieces. Since this guide element is subject to a considerably longer operating time and therefore wears out more quickly, it is designed as a simple plate which can be replaced simply and inexpensively. Due to the wedge, which can optionally be moved into the blasting agent jet, the blasting agent is deflected on both sides according to the wedge angle. With this wedge it is possible in particular to radiate the leading and trailing end faces of a profile, a steel structure or the like in a continuous process. For the mode of operation of the blasting system designed according to the invention, this means that when a profile, a steel structure or the like is supplied, the deflection wedge is first brought into the operative position in order to blast the leading end face. The wedge is then moved out of the blasting agent jet and the guide plate is moved in to blast the surface of the profile, the steel structure or the like. If the trailing end of the workpiece reaches the blasting agent jet, either the guide plate can remain in the jet, because it directs the beam from behind onto the workpiece or the wedge is moved into the beam. If, on the other hand, only one sheet or strip is to be treated, only the guide plate is used. This creates a universally applicable blasting system that works optimally for every type of workpiece.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, daß die Ablenkeinrichtung eine sich quer zum Strahlmittelstrahl erstreckende und gegenüber diesem seitlich versetzt angeordnete Schwenkachse aufweist, an deren einer Seite und parallel zu ihr die Leitplatte und an deren gegenüberliegender Seite der sich parallel zu ihr erstreckende Ablenkkeil angeordnet ist.According to a preferred embodiment it is provided that the deflection device has a pivot axis which extends transversely to the blasting agent jet and is laterally offset with respect to it, on one side and parallel to it the guide plate and on the opposite side of which the deflection wedge extending parallel to it is arranged.

Wenngleich jede beliebige translatorische oder rotatorische Bewegung für die Ablenkeinrichtung denkbar ist, ist vorzugsweise eine Schwenkbewegung mittels der vorgenannten Schwenkachse vorgesehen, zu deren beiden Seiten die Leitplatte und der Keil angeordnet sind, die sich beide parallel zur Schwenkachse erstrecken und den Strahl über seine gesamte Breite beeinflussen.Although any translatory or rotary movement is conceivable for the deflection device, a pivoting movement is preferably provided by means of the aforementioned pivot axis, on the two sides of which the guide plate and the wedge are arranged, both of which extend parallel to the pivot axis and influence the beam over its entire width .

Bei der vorgenannten Ausführungsform ist für die eine oder andere Betriebsweise vorgesehen, daß in einer Stellung der Schwenkachse die Leitplatte von der Seite her schräg in den Strahlmittelstrahl hineinragt, während in einer um 180 Grad gedrehten Stellung der Ablenkkeil mit seiner Achse etwa in der Achse des Strahlmittelstrahls angeordnet ist.In the aforementioned embodiment, one or the other mode of operation provides that in one position of the pivot axis the guide plate protrudes obliquely from the side into the blasting agent jet, while in a position rotated by 180 degrees the deflecting wedge with its axis approximately in the axis of the blasting agent jet is arranged.

Eine in konstruktiver und funktionstechnischer Hinsicht besonders einfache Ausführung ergibt sich dadurch, daß die Leitplatte und der Ablenkkeil über Stegbleche zu einer Baueinheit verbunden sind, die an der Schwenkachse befestigt ist.A particularly simple design in terms of construction and functionality results from the fact that the guide plate and the deflection wedge are connected via web plates to form a structural unit which is fastened to the swivel axis.

Nachstehend ist die Erfindung anhand eines in der Zeichnung wiedergegebenen Ausführungsbeispiels beschrieben.
In der Zeichnung zeigen:

Figur 1
eine Stirnansicht auf eine Strahlanlage;
Figur 2
eine schematische Ansicht des Strahlvorgangs;
Figur 3
eine Stirnansicht der Ablenkeinrichtung und
Figur 4
eine Seitenansicht auf die Ablenkeinrichtung gemäß Figur 3.
The invention is described below using an exemplary embodiment shown in the drawing.
The drawing shows:
Figure 1
an end view of a blasting system;
Figure 2
a schematic view of the blasting process;
Figure 3
a front view of the deflector and
Figure 4
3 shows a side view of the deflection device according to FIG. 3.

Die in Fig. 1 gezeigte Strahlanlage weist eine langgestreckte Strahlkabine 1 auf, in der eine Fördereinrichtung 2 angeordnet ist, die sich vor und hinter der Strahlkabine 1 fortsetzt. Die Fördereinrichtung 2 kann beispielsweise ein Rollengang sein. Im oberen Bereich der Strahlkabine 1 sind mehrere Schleuderräder 3 angeordnet, deren Strahlmittelstrahl fächerartig nach unten gerichtet ist. In gleicher Weise sind im unteren Bereich Schleuderräder 4 angeordnet, deren Strahlmittelstrahl fächerartig nach oben gerichtet ist. Der Boden 6 der Strahlkabine 1 ist muldenförmig nach unten verjüngt, um das benutzte Strahlmittel einem Förderer 7 zur Rückführung in den Strahlprozeß zuzuführen. Die zur Aufbereitung des Strahlmittels dienenden und in der Zeichnung schematisch angedeuteten Anlageteile sind bekannt und hier nicht weiter zu beschreiben, da sie nicht zur Erfindung gehören. Schließlich ist die Strahlkabine 1 mit einer Luft-/Staubabsaugung 8 ausgestattet. Auch die Aufbereitung der Luft erfolgt in den rechts erkennbaren Anlagenteilen.The blasting system shown in FIG. 1 has an elongated blasting cubicle 1, in which a conveyor device 2 is arranged, which continues in front of and behind the blasting cubicle 1. The conveyor 2 can be a roller conveyor, for example. In the upper area of the blasting cabin 1, a plurality of centrifugal wheels 3 are arranged, the blasting medium jet of which is directed downwards in a fan-like manner. In the same way, centrifugal wheels 4 are arranged in the lower region, the blasting medium jet of which is directed upwards in a fan-like manner. The bottom 6 of the blasting cabinet 1 is tapered downwards in a trough-shaped manner in order to feed the blasting agent used to a conveyor 7 for recycling into the blasting process. Those used to prepare the abrasive and system parts indicated schematically in the drawing are known and cannot be described further here since they do not belong to the invention. Finally, the blasting cabin 1 is equipped with an air / dust extraction 8. The air is also processed in the system parts shown on the right.

Von den oberen Schleuderrädern 3 werden die nach oben freiliegenden Oberflächen und Seitenflächen des Werkstücks gestrahlt, während von den unteren Schleuderrädern die nach unten weisenden Flächen sowie gleichfalls die Seitenflächen behandelt werden. Bei der Bearbeitung von Blechen, Bändern, oder sonstigem Flachmaterial wird das Strahmittel aufgrund der schräg gerichteten Strahlmittelstrahlen zur Seite hin reflektiert und gelangt über den trichterförmigen Boden 6 in die Förderschnecke 7. Das Gleiche gilt für das gesamte von den unteren Schleuderrädern 4 auf das Werkstück bzw. Halbzeug treffende Strahlmittel. Soweit das Strahlmittel auf dem Halbzeug bzw. Werkstück liegen bleibt, wird es am Ende der Förderstrecke abgeblasen und über die Förderschnecke rückgeführt. Um bei Blechen, insbesondere aber auch bei Profilen und langgestreckten Stahlkonstruktionen zu vermeiden, daß das Strahlmittel entgegen der Förderrichtung auf die Oberfläche reflektiert wird und auf dem Werkstück liegen bleibt, ist eine in Fig. 1 nicht näher gezeigte Ablenkeinrichtung vorgesehen.The surfaces and side surfaces of the workpiece which are exposed at the top are blasted by the upper centrifugal wheels 3, while the surfaces facing downwards and also the side surfaces are treated by the lower centrifugal wheels. When processing sheet metal, strips, or other flat material, the blasting agent is reflected to the side due to the obliquely directed blasting agent jets and reaches the screw conveyor 7 via the funnel-shaped bottom 6. The same applies to the whole of the lower centrifugal wheels 4 on the workpiece or Blasting media hitting semi-finished products. As far as the abrasive remains on the semi-finished product or workpiece, it is blown off at the end of the conveyor line and returned via the screw conveyor. In order to avoid that the blasting agent is reflected on the surface against the conveying direction and remains on the workpiece in the case of metal sheets, in particular also in the case of profiles and elongated steel structures, a deflection device, not shown in FIG. 1, is provided.

Eine Ausführungsform der Ablenkeinrichtung ist nachfolgend anhand der schematischen Darstellung in Fig. 2 beschrieben. Fig. 2 zeigt ein Werkstück 9 in Form eines langgestreckten Doppel-T-Profils 10, das in Richtung des Pfeils 11 durch die Strahlkabine 1 hindurchgeführt wird. In Fig. 2 ist schematisch ein oberes, ortsfestes Schleuderrad 3 angedeutet und in strichpunktierter Darstellung verschiedene Positionen des Werkstücks 9 gegenüber den Schleuderrädern 3. Desgleichen ist eines der unteren Schleuderräder 4 strichpunktiert angedeutet.An embodiment of the deflection device is described below with reference to the schematic illustration in FIG. 2. 2 shows a workpiece 9 in the form of an elongated double T profile 10, which is passed through the blasting cabinet 1 in the direction of the arrow 11. In Fig. 2, an upper, fixed centrifugal wheel 3 is indicated schematically and different positions of the workpiece 9 relative to the centrifugal wheels in dash-dotted lines 3. Likewise, one of the lower centrifugal wheels 4 is indicated by dash-dotted lines.

Die den oberen Schleuderrädern 3 zugeordnete Ablenkeinrichtung 15 weist als eines der Leitorgane einen Ablenkkeil 12 und als anderes Leitorgan eine Leitplatte 13 auf, die wahlweise und zwangsgekoppelt in den Strahlmittelstrahl 14 hineinbewegbar sind. Der Keil 12 lenkt den Strahlmittelstrahl 14 entsprechend dem Keilwinkel nach beiden Seiten, d.h. in und entgegen der Förderrichtung ab, während die Leitplatte 13 den Strahlmittelstrahl 14 lediglich in Förderrichtung 11 ablenkt.The deflection device 15 assigned to the upper centrifugal wheels 3 has a deflection wedge 12 as one of the guide members and a guide plate 13 as another guide member, which can be moved selectively and positively coupled into the blasting agent jet 14. The wedge 12 directs the blasting medium jet 14 to both sides in accordance with the wedge angle, i.e. in and against the conveying direction, while the guide plate 13 deflects the abrasive jet 14 only in the conveying direction 11.

Beim Einlaufen des Werkstücks 9 in die Strahlkabine 1 befindet sich zunächst der Keil 12 der Ablenkeinrichtung im Strahlmittelstrahl 14, so daß die vorlaufende Stirnseite 16 des Werkstücks 9 von dem einem Teilstrahl 17 bearbeitet wird. Sobald die vordere Stirnseite 16 den Teilstrahl 17 passiert hat, wird die Leitplatte 13 in den Strahlmittelstrahl 14 eingebracht, die aufgrund ihrer Anstellung in Förderrichtung 11 einen in diese Richtung orientierten Strahl 18 erzeugt. Das auf die Oberfläche - beim gezeigten Ausführungsbeispiel in das rinnenförmig nach oben offene Profil des Doppel-T-Trägers 10 - auftreffende Strahlmittel wird demzufolge in Förderrichtung 11 reflektiert und kann sich nicht entgegen der Förderrichtung hinter dem Strahl 18 auf der Oberfläche ablagern. Bevor schließlich die nachlaufende Stirnseite 19 das Schleuderrad 3 erreicht, wird wiederum der Keil 12 in den Strahlmittelstrahl 14 gebracht, so daß der von ihm erzeugte andere Teilstrahl 20 auf die nachlaufende Stirnseite 19 trifft.When the workpiece 9 enters the blasting cabinet 1, the wedge 12 of the deflection device is initially in the blasting medium jet 14, so that the leading end face 16 of the workpiece 9 is processed by the one partial jet 17. As soon as the front end 16 has passed the partial jet 17, the guide plate 13 is introduced into the blasting agent jet 14, which generates a jet 18 oriented in this direction due to its inclination in the conveying direction 11. The abrasive that strikes the surface - in the embodiment shown into the channel-shaped profile of the double-T support 10 - is consequently reflected in the conveying direction 11 and cannot be deposited on the surface behind the jet 18 against the conveying direction. Before the trailing end face 19 finally reaches the centrifugal wheel 3, the wedge 12 is again brought into the blasting agent jet 14, so that the other partial jet 20 generated by it hits the trailing end face 19.

In den Figuren 3 und 4 ist eine Ausführungsform der Ablenkeinrichtung 15 näher dargestellt. Unterhalb des Gehäuses des Schleuderrades 3 (siehe Fig. 3) ist die Ablenkeinrichtung 15 angeordnet, die, wie bereits geschildert, einen Ablenkkeil 12 und eine Leitplatte 13 aufweist. Beim gezeigten Ausführungsbeispiel sind der Keil 12 und die Leitplatte 13 beiderseits einer gemeinsamen Schwenkachse 21 angeordnet, die ihrerseits unterhalb des Austritts des Strahlmittelstrahls 14 und quer zu diesem verläuft. Sie ist, wie Fig. 4 zeigt, an ihren beiden Enden in Lagern 22 des Gehäuses des Schleuderrades gelagert. Der Keil 12 und die Leitplatte 13 sind über Stegbleche 23 und Schraubenverbindungen 24 lösbar miteinander verbunden. Sie bilden auf diese Weise eine Baueinheit, die mittels der Schwenkachse 21 verschwenkbar ist. Hierzu kann ein Handhebel 25 oder auch ein Abtrieb dienen. Aufgrund der Schraubverbindung 24 können wahlweise der Keil 12 oder die Leitplatte 13 ausgewechselt werden.An embodiment of the deflection device 15 is shown in more detail in FIGS. 3 and 4. Below the case of the centrifugal wheel 3 (see FIG. 3), the deflection device 15 is arranged, which, as already described, has a deflection wedge 12 and a guide plate 13. In the exemplary embodiment shown, the wedge 12 and the guide plate 13 are arranged on both sides of a common pivot axis 21, which in turn runs below the exit of the blasting agent jet 14 and transversely thereto. As shown in FIG. 4, it is supported at its two ends in bearings 22 of the casing of the centrifugal wheel. The wedge 12 and the guide plate 13 are detachably connected to one another via web plates 23 and screw connections 24. In this way, they form a structural unit which can be pivoted by means of the pivot axis 21. A hand lever 25 or an output can serve this purpose. Because of the screw connection 24, either the wedge 12 or the guide plate 13 can be replaced.

In Fig. 3 ist eine Betriebsstellung der Ablenkeinrichtung 15 wiedergegeben, bei der sich die Leitplatte 13 im Strahlmittelstrahl 14 befindet und diesen zu einem Strahl 18 ablenkt, wie dies in der mittleren Position der Fig. 2 gezeigt ist. Durch Verschwenken des Handhebels 15 aus der links wiedergegebenen, durchgezogenen Stellung in die rechts gezeigte strichpunktierte Lage wird der Keil 12 in die Position 12 geschwenkt, in der er sich etwa in der Mitte des Strahlmittelstrahls 14 befindet und diesen entsprechend der linken und rechten Position in Fig. 2 aufteilt und ablenkt. In dieser Position befindet sich die Leitplatte 13 außerhalb des Strahlmittelstrahls und etwa in der Position, in der sich zuvor der Keil 12 befand.FIG. 3 shows an operating position of the deflection device 15, in which the guide plate 13 is located in the blasting agent jet 14 and deflects it into a jet 18, as is shown in the middle position in FIG. 2. By pivoting the hand lever 15 from the solid position shown on the left into the dash-dotted position shown on the right, the wedge 12 is pivoted into the position 12, in which it is located approximately in the middle of the blasting agent jet 14 and this corresponds to the left and right position in FIG 2 divides and distracts. In this position, the guide plate 13 is located outside the blasting agent jet and approximately in the position in which the wedge 12 was previously.

Claims (9)

Strahlanlage zum Strahlen der Oberfläche von wenigstens in einer Ausdehnungsrichtung langgestreckten Werkstücken, wie Bleche, Profile od. dgl., mit einer Strahlkabine mit wenigstens einem Schleuderrad zum Beschleunigen des Strahlmittels und einer die Werkstücke durch die Strahlkabine unterhalb des Schleuderrades hindurch bewegenden Fördereinrichtung sowie mit einer die Richtung des Strahlmittelstrahls nach seinem Austritt aus dem Schleuderrad beeinflussenden Ablenkeinrichtung, dadurch gekennzeichnet, daß die Ablenkeinrichtung (15) wenigstens zwei Leitorgane (12, 13) aufweist, die wahlweise in den Strahlmittelstrahl (14) derart bewegbar sind, daß das eine Leitorgan (13) den Strahlmittelstrahl (14) in Richtung (11) der Bewegung der Fördereinrichtung (2), das andere Leitorgan (12) den Strahlmittelstrahl entgegen der Bewegungsrichtung der Fördereinrichtung ablenkt.Blasting system for blasting the surface of workpieces elongated in at least one direction of expansion, such as sheets, profiles or the like, with a blasting cabin with at least one blast wheel for accelerating the blasting agent and a conveyor device which moves the workpieces through the blasting cabin below the blast wheel and with a conveyor Direction of the blasting agent jet after it emerges from the centrifugal deflection device, characterized in that the deflection device (15) has at least two guide members (12, 13) which can be moved in the blasting agent jet (14) in such a way that the one guide member (13) the blasting agent jet (14) in the direction (11) of the movement of the conveying device (2), the other guide element (12) deflects the blasting agent jet against the direction of movement of the conveying device. Strahlanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Leitorgane (12, 13) zwangsgekoppelt und translatorisch oder rotatorisch in den Strahlmittelstrahl (14) bewegbar sind.Blasting system according to claim 1, characterized in that the guide members (12, 13) are positively coupled and can be moved in the blasting medium jet (14) in a translatory or rotary manner. Strahlanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die beiden Leitorgane von einem Ablenkkeil (12) gebildet sind, dessen Keilspitze zum Schleuderrad (3) ausgerichtet ist und dessen eine Keilfläche den Strahlmittelstrahl (14) in der einen Richtung und dessen andere Keilfläche nach dem Bewegen in den Strahlmittelstrahl (14) diesen in die andere Richtung ablenkt.Blasting system according to claim 1 or 2, characterized in that the two guide members are formed by a deflecting wedge (12), the wedge tip of which is aligned with the centrifugal wheel (3) and one wedge surface of which follows the blasting agent jet (14) in one direction and the other wedge surface moving into the blasting medium jet (14) deflects it in the other direction. Strahlanlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Ablenkkeil (12) bezüglich des Strahlmittelstrahls (14) derart bewegbar ist, daß nur jeweils eine der Keilflächen wirksam ist oder aber in einer mittleren Stellung beide Keilflächen als Leitorgane wirksam sind und den Strahlmittelstrahl nach beiden Seiten ablenken.Blasting system according to one of claims 1 to 3, characterized in that the deflecting wedge (12) can be moved with respect to the blasting agent jet (14) in such a way that only one of the wedge surfaces is effective in each case or both wedge surfaces are effective as guide members in a central position and the Deflect the blasting agent jet on both sides. Strahlanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß beide Leitorgane als Leitplatten (13) ausgebildet sind, die so miteinander gekoppelt sind, daß beim Bewegen der einen Leitplatte in den Strahlmittelstrahl (14) die andere Leitplatte in eine unwirksame Lage gelangt.Blasting system according to claim 1 or 2, characterized in that both guide members are designed as guide plates (13) which are coupled to one another such that when one guide plate is moved into the blasting agent jet (14) the other guide plate comes into an ineffective position. Strahlanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das eine Leitorgan eine den Strahlmittelstrahl in Richtung (11) der Bewegung der Fördereinrichtung (2) ablenkende Leitplatte (13), das andere Leitorgan ein Ablenkkeil (12) ist, der den Strahlmittelstahl (14) nach beiden Seiten entsprechend dem Keilwinkel aufteilt und ablenkt.Blasting system according to claim 1 or 2, characterized in that the one guide element is a guide plate (13) deflecting the blast medium jet in the direction (11) of the movement of the conveying device (2), the other guide element is a deflecting wedge (12) which holds the blast medium steel (14) divides and deflects on both sides according to the wedge angle. Strahlanlage nach Anspruch 6, dadurch gekennzeichnet, daß die Ablenkeinrichtung (15) eine sich quer zum Strahlmittelstrahl (14) erstreckende und gegenüber diesem seitlich versetzt angeordnete Schwenkachse (21) aufweist, an deren einer Seite und parallel zu ihr die Leitplatte (13) und an deren gegenüberliegender Seite der sich parallel zu ihr erstreckende Ablenkkeil (12) angeordnet ist.Blasting system according to claim 6, characterized in that the deflection device (15) has a pivot axis (21) which extends transversely to the blasting medium jet (14) and is laterally offset with respect to it, on one side and parallel to it the guide plate (13) and on the opposite side of which the deflection wedge (12) extending parallel to it is arranged. Strahlanlage nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß in einer Stellung der Schwenkachse (21) die Leitplatte (13) von der Seite her schräg in den Strahlmittelstrahl (14) hineinragt, während in einer um 180 Grad gedrehten Stellung der Ablenkkeil (12) mit seiner Achse etwa in der Achse des Strahlmittelstrahls (14) angeordnet ist.Blasting system according to claim 6 or 7, characterized in that in a position of the pivot axis (21) the guide plate (13) projects obliquely into the blasting medium jet (14) from the side, while in a position rotated by 180 degrees the deflecting wedge (12) with its axis is arranged approximately in the axis of the blasting medium jet (14). Strahlanlage nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Leitplatte (13) und der Ablenkkeil (12) über Stegbleche (23) zu einer Baueinheit verbunden sind, die an der Schwenkachse (21) befestigt ist.Blasting system according to one of claims 6 to 8, characterized in that the guide plate (13) and the deflection wedge (12) are connected via web plates (23) to form a structural unit which is fastened to the swivel axis (21).
EP91120534A 1990-12-12 1991-11-29 Blast installation for blasting the surface of sheet metal, sections or the like Expired - Lifetime EP0490189B1 (en)

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DE4039621A DE4039621A1 (en) 1990-12-12 1990-12-12 BLASTING UNIT FOR BLASTING THE SURFACE OF SHEETS, PROFILES OR THE LIKE

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US7261922B2 (en) * 2004-07-23 2007-08-28 Valmont Industries, Inc. Method of applying additional corrosion protection to a localized portion of a galvanized pole
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Also Published As

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JPH05185375A (en) 1993-07-27
JP3176670B2 (en) 2001-06-18
DE59100638D1 (en) 1994-01-05
DE4039621A1 (en) 1992-06-17
EP0490189B1 (en) 1993-11-24

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