EP0350965A2 - Abrasive-blasting head for the blasting of large surfaces by particles carried in a jet of air - Google Patents

Abrasive-blasting head for the blasting of large surfaces by particles carried in a jet of air Download PDF

Info

Publication number
EP0350965A2
EP0350965A2 EP19890112996 EP89112996A EP0350965A2 EP 0350965 A2 EP0350965 A2 EP 0350965A2 EP 19890112996 EP19890112996 EP 19890112996 EP 89112996 A EP89112996 A EP 89112996A EP 0350965 A2 EP0350965 A2 EP 0350965A2
Authority
EP
European Patent Office
Prior art keywords
blasting
chamber
nozzle
centrifugal
head according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890112996
Other languages
German (de)
French (fr)
Other versions
EP0350965A3 (en
Inventor
Alexandra Mick
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.)
KAMMERLOHR, FRIEDRICH
Original Assignee
Kammerlohr Friedrich
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 Kammerlohr Friedrich filed Critical Kammerlohr Friedrich
Publication of EP0350965A2 publication Critical patent/EP0350965A2/en
Publication of EP0350965A3 publication Critical patent/EP0350965A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
    • B24C3/065—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable with suction means for the abrasive and the waste material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/003—Removing abrasive powder out of the blasting machine

Definitions

  • the invention relates to a centrifugal jet head according to the preamble of claim 1.
  • Centrifugal jet heads with the features of the preamble of claim 1 are already known, which have the shape of a box to be placed on the surface to be blasted, open to the surface to be blasted, the edge part of which is to be placed on the surface to be blasted is designed as a brush seal.
  • the blasting nozzle opens approximately vertically into the blasting chamber from above, and also at the upper end of the blasting chamber, that is to say approximately opposite the surface to be blasted facing blast chamber opening, an outlet nozzle for suction of the conveying air and the used blasting medium is arranged obliquely. It is known to form the lower wall section of the blasting chamber from transparent material in order to allow an insight into the blasting chamber.
  • the invention is based on the object of providing a centrifugal jet head which is easier and more convenient to use than the known centrifugal jet heads, which gives better radiation results and enables better observation of the radiation result.
  • the obliquely arranged blasting nozzle produces a better blasting result than the blasting nozzles of conventional centrifugal jet heads, which are directed essentially perpendicular to the surface to be blasted, and in connection with the outlet nozzle opposite, much better flow conditions are obtained in the blasting chamber, since the jet exits the blasting nozzle obliquely onto the surface to be blasted, is reflected on this and then, without hindering or impairing the incoming jet, reaches the outlet nozzle directly.
  • conventional centrifugal jet heads develop a countercurrent of the supplied jet and the exhaust air jet, which can have a considerable impact on the radiation effect.
  • the viewing window directly opposite the blasting chamber opening and thus expediently of approximately the same area enables direct and convenient observation of the blasting process without being obstructed by the exhaust air flow during
  • the spent blasting medium that has just been whirled up in the edge zones of the blasting chamber there is hardly any usable observation option, especially since there the transparent chamber wall is oriented perpendicular to the surface to be blasted.
  • the interchangeable arrangement of the viewing window according to claim 8 is advantageous because then the viewing window pane, if it has been scratched by the blasting agent, can be quickly replaced.
  • the sealing pad according to claim 9 on the edge part of the blasting chamber enables a reliable sealing of the blasting chamber to the surface to be blasted, even if this should be somewhat curved, and enables the blasting chamber to be moved easily on the object surface without damaging it.
  • the inlet check valve according to claim 10 allows the entry of outside air when a vacuum occurs in the blasting chamber when the work is interrupted, for example when the jet is briefly interrupted for better observability of the blasted surface through the viewing window.
  • the tapering flat trapezoidal box shape of the blasting chamber according to claim 7 results in optimal flow conditions.
  • the centrifugal blasting head has a blasting chamber 1 in the form of a relatively flat box, which has an opening 2 on its underside and an exchangeably mounted viewing window 3 on its opposite side.
  • the viewing window can be mounted in the blasting chamber by means of retaining strips 9 which can be screwed onto the chamber wall, these simple details not being shown in detail for the sake of clarity.
  • the edge part 1a of the blasting chamber 1 which surrounds the opening 2 of the blasting chamber carries a soft-elastic sealing pad 4 for placing the blasting chamber on the surface to be blasted.
  • a blasting nozzle 5 is arranged on the blasting chamber, the nozzle axis of which is oriented obliquely to the main plane of the opening 2.
  • an outlet connection 6 On the opposite side of the blasting chamber 1 with respect to the opening 2 of the blasting nozzle 5 there is an outlet connection 6, the axis of which is also oriented obliquely to the main plane of the opening 2, namely at approximately the same angle as the blasting nozzle 5.
  • the jet nozzle 5 is shown in Fig. 3 in more detail, although still very schematically. It is held on the wall of the blasting chamber 1 by means of an articulated flange stop 7, the articulated flange bearing allowing the jet nozzle 5 to be pivoted on all sides in the swivel angle range specified, for example. At the same time, the nozzle is guided so as to be longitudinally displaceable along its longitudinal axis and is biased into its rear position by means of a compression spring 8.
  • the longitudinal displaceability of the jet nozzle 5 is indicated in the drawings by the arrow x.
  • the jet nozzle 5 is not quite in its rearmost position in FIG. 3 in order to show a stop ring 5a at the front end of the nozzle more clearly, which limits the displaceability of the jet nozzle to the rear by a stop on the articulated flange bearing.
  • An inlet check valve 10 in the blasting chamber wall (FIG. 1) allows outside air to enter at a negative pressure in the blasting chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Abrasive-blasting head for the blasting of large surfaces by particles carried in a jet of air, comprising a manually guidable blast chamber (1), which is to be placed on the surface to be blasted and has a blast chamber opening (2) which is surrounded by a rim part (1a) which can be placed on the surface to be blasted, and comprising a transparent chamber wall region (3), a blast nozzle (5) which opens into the blast chamber and is directed towards the blast chamber opening, and an outlet socket (6), arranged on the blast chamber, for discharging conveying air and used blast particles, in the case of which the blast nozzle (5) is arranged at an acute angle to the plane of the blast chamber opening (2) and essentially to the side thereof on the blast chamber (1), the outlet socket (6) is essentially arranged opposite the blast nozzle (5) on the blast chamber, and the transparent chamber wall region is constructed as a viewing window (3) opposite the blast chamber opening (2). <IMAGE>

Description

Die Erfindung betrifft einen Schleuderstrahlkopf nach dem Oberbegriff des Anspruchs 1.The invention relates to a centrifugal jet head according to the preamble of claim 1.

Das Abstrahlen von Oberflächen an großen Objekten wie bei­speilsweise Flugzeugen erfordert die Verwendung eines Schleuderstrahlkopfes mit auf die abzustrahlende Oberfläche aufzusetzender Strahlkammer, da ein Abstrahlen mit freiem Strahl kaum praktikabel ist. Ein Abstrahlen im Freien ist unwirtschaftlich, weil das hochwertige Strahlmittel (Kunst­stoffteilchen) verloren wäre, und ein Abstrahlen in geschlos­senen Hallen mit freiem Strahl würde wegen der Staubent­wicklung andere parallele Arbeiten in der Halle, insbesondere am gleichen Objekt, unmöglich machen.The blasting of surfaces on large objects such as airplanes requires the use of a centrifugal blasting head with a blasting chamber to be placed on the surface to be blasted, since blasting with a free jet is hardly practical. Blasting outdoors is uneconomical because the high-quality blasting agent (plastic particles) would be lost, and blasting in closed halls with a free jet would make other parallel work in the hall, especially on the same object, impossible due to the development of dust.

Es sind bereits Schleuderstrahlköpfe mit den Merkmalen des Oberbegriffs des Anspruchs 1 bekannt, welche die Form eines auf die abzustrahlende Fläche aufzusetzenden, zu der abzu­strahlenden Fläche hin offenen Kastens haben, dessen auf die abzustrahlende Fläche aufzusetzender Randteil als Bürsten­dichtung ausgebildet ist. Die Strahldüse mündet bei diesen bekannten Schleuderstrahlköpfen etwa senkrecht von oben in die Strahlkammer, und ebenfalls am oberen Ende der Strahl­kammer, also etwa gegenüber der der abzustrahlenden Fläche zugewandten Strahlkammeröffnung, ist ein Auslaßstutzen zum Absaugen der Förderluft und des verbrauchten Strahlmittels schräg angeordnet. Dabei ist es bekannt, den unteren Wand­abschnitt der Strahlkammer aus durchsichtigem Material aus­zubilden, um einen Einblick in die Strahlkammer zu ermög­lichen.Centrifugal jet heads with the features of the preamble of claim 1 are already known, which have the shape of a box to be placed on the surface to be blasted, open to the surface to be blasted, the edge part of which is to be placed on the surface to be blasted is designed as a brush seal. In these known centrifugal blasting heads, the blasting nozzle opens approximately vertically into the blasting chamber from above, and also at the upper end of the blasting chamber, that is to say approximately opposite the surface to be blasted facing blast chamber opening, an outlet nozzle for suction of the conveying air and the used blasting medium is arranged obliquely. It is known to form the lower wall section of the blasting chamber from transparent material in order to allow an insight into the blasting chamber.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, einen Schleuderstrahlkopf zu schaffen, der gegenüber den bekannten Schleuderstrahlköpfen leichter und bequemer zu handhaben ist, bessere Abstrahlergebnisse erbringt und eine bessere Beobach­tung des Abstrahlergebnisses ermöglicht.In contrast, the invention is based on the object of providing a centrifugal jet head which is easier and more convenient to use than the known centrifugal jet heads, which gives better radiation results and enables better observation of the radiation result.

Diese Aufgabe wird gemäß der Erfindung durch den im Anspruch 1 gekennzeichneten Schleuderstrahlkopf gelöst.This object is achieved according to the invention by the centrifugal jet head characterized in claim 1.

Der erfindungsgemäße Schleuderstrahlkopf bringt folgende Vorteile:The centrifugal jet head according to the invention has the following advantages:

Die schräg angeordnete Strahldüse erbringt ein besseres Ab­strahlergebnis als die im wesentlichen senkrecht zur abzu­strahlenden Fläche gerichteten Strahldüsen herkömmlicher Schleuderstrahlköpfe, und in Verbindung mit dem gegenüber­liegenden Auslaßstutzen erhält man viel bessere Strömungs­verhältnisse in der Strahlkammer, da der Strahl von der Strahldüse schräg auf die abzustrahlende Fläche austritt, an dieser reflektiert wird und dann, ohne den einströmenden Strahl zu behindern oder zu beeinträchtigen, direkt in den Auslaßstutzen gelangt. Bei herkömmlichen Schleuderstrahl­köpfen entwickelt sich im Gegensatz dazu ein Gegenstrom von zugeführtem Strahl und Abluftstrahl, der die Abstrahlwirkung in nicht unbeträchtlichem Maße beeinträchtigen kann.The obliquely arranged blasting nozzle produces a better blasting result than the blasting nozzles of conventional centrifugal jet heads, which are directed essentially perpendicular to the surface to be blasted, and in connection with the outlet nozzle opposite, much better flow conditions are obtained in the blasting chamber, since the jet exits the blasting nozzle obliquely onto the surface to be blasted, is reflected on this and then, without hindering or impairing the incoming jet, reaches the outlet nozzle directly. In contrast, conventional centrifugal jet heads develop a countercurrent of the supplied jet and the exhaust air jet, which can have a considerable impact on the radiation effect.

Das der Strahlkammeröffnung direkt gegenüberliegende und damit zweckmäßigerweise etwa flächengleiche Sichtfenster ermöglicht eine direkte und bequeme Beobachtung des Abstrahl­vorgangs ohne Behinderung durch die Abluftströmung, während bei herkömmlichen Schleuderstrahlköpfen wegen des gerade in den Randzonen der Strahlkammer aufgewirbelten verbrauchten Strahlmittels kaum eine brauchbare Beobachtungsmöglichkeit besteht, zumal dort die durchsichtige Kammerwand senkrecht zur abzustrahlenden Fläche orientiert ist. Beim Abstrahlen empfindlicher Objekte, beispielsweise der Außenhaut von Flugzeugen, ist es aber sehr wichtig, zwar die Farbschicht (beispielsweise zum Zwecke von Routineuntersuchungen) voll­ständig zu entfernen, die Flugzeughaut dabei aber nicht zu beschädigen.The viewing window directly opposite the blasting chamber opening and thus expediently of approximately the same area enables direct and convenient observation of the blasting process without being obstructed by the exhaust air flow during In conventional centrifugal blast heads, because of the spent blasting medium that has just been whirled up in the edge zones of the blasting chamber, there is hardly any usable observation option, especially since there the transparent chamber wall is oriented perpendicular to the surface to be blasted. When blasting sensitive objects, such as the outer skin of airplanes, it is very important to completely remove the paint layer (for example, for routine examinations), but not to damage the aircraft skin.

Da die erfindungsgemäße Anordnung außerdem zu einer flachen Bauweise des Schleuderstrahlkopfes führt, und wegen der ganz erheblich verbesserten Beobachtungsmöglichkeit ergibt sich auch eine viel einfachere und bequemere Handhabung des erfindungsgemäßen Schleuderstrahlkopfes.Since the arrangement according to the invention also leads to a flat design of the centrifugal jet head, and because of the considerably improved observation possibility, there is also a much simpler and more convenient handling of the centrifugal jet head according to the invention.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Besonders hervorzuheben ist dabei die Möglichkeit der gezielten Beeinflussung des Abstrahlvorgangs durch Führen der gemäß Ansprüchen 3 bis 6 schwenkbar und gegebenenfalls zusätzlich axial verschiebbar mit der Strahlkammer verbun­denen Strahldüse, wobei die Strahlwirkung durch näheres Hinführen der Strahldüse zur Strahlkammeröffnung verstärkt oder die von der Strahlkammer überdeckte Fläche ohne ständige Bewegung der gesamten Strahlkammer durch Schwenken der Düse gleichmäßig abgestrahlt werden kann. Durch etwa symmetrische Winkelanordnung von Strahldüse und gegenüberliegendem Aus­laßstutzen gemäß Anspruch 2 erhält man optimale Strömungs­verhältnisse.Particularly noteworthy here is the possibility of specifically influencing the blasting process by guiding the blasting nozzle which is pivotally connected and optionally also axially displaceably connected to the blasting chamber, the blasting effect being strengthened by moving the blasting nozzle closer to the blasting chamber opening or the area covered by the blasting chamber without constant movement of the entire blasting chamber can be emitted evenly by swiveling the nozzle. Optimal flow conditions are obtained by approximately symmetrical angular arrangement of the jet nozzle and the opposite outlet nozzle.

Die auswechselbare Anordnung des Sichtfensters gemäß An­spruch 8 ist vorteilhaft, weil dann die Sichtfensterscheibe, sollte sie durch das Strahlmittel verkratzt worden sein, schnell ersetzt werden kann.The interchangeable arrangement of the viewing window according to claim 8 is advantageous because then the viewing window pane, if it has been scratched by the blasting agent, can be quickly replaced.

Das Dichtungspolster nach Anspruch 9 am Randteil der Strahl­kammer ermöglicht eine zuverlässige Abdichtung der Strahl­kammer zu der abzustrahlenden Fläche, auch wenn diese etwas gewölbt sein sollte, und ermöglicht ein leichtes Verschieben der Strahlkammer auf der Objektoberfläche, ohne diese zu beschädigen. Das Einlaßrückschlagventil gemäß Anspruch 10 ermöglicht den Zutritt von Außenluft, wenn sich bei Arbeits­unterbrechungen, nämlich beispielsweise beim kurzzeitigen Unterbrechen des Strahls zur besseren Beobachtbarkeit der abgestrahlten Oberfläche durch das Sichtfenster, durch die Absaugung des verbrauchten Strahlmittels ein Unterdruck in der Strahlkammer einstellt.The sealing pad according to claim 9 on the edge part of the blasting chamber enables a reliable sealing of the blasting chamber to the surface to be blasted, even if this should be somewhat curved, and enables the blasting chamber to be moved easily on the object surface without damaging it. The inlet check valve according to claim 10 allows the entry of outside air when a vacuum occurs in the blasting chamber when the work is interrupted, for example when the jet is briefly interrupted for better observability of the blasted surface through the viewing window.

Die sich verjüngende flache Trapezkastenform der Strahl­kammer nach Anspruch 7 ergibt optimale Strömungsverhältnisse.The tapering flat trapezoidal box shape of the blasting chamber according to claim 7 results in optimal flow conditions.

Ein Ausführungsbeispiel der Erfindung ist in den anliegenden Zeichnungen nur schematisch dargestellt und wird nachstehend kurz erläutert. In den Zeichnungen zeigt:

  • Fig. 1 einen Schleuderstrahlkopf nach der Erfindung im Längsschnitt,
  • Fig. 2 den Schleuderstrahlkopf in Drauf­sicht, und
  • Fig. 3 die Strahldüse in näheren Einzel­heiten.
An embodiment of the invention is shown only schematically in the accompanying drawings and is briefly explained below. In the drawings:
  • 1 shows a centrifugal jet head according to the invention in longitudinal section,
  • Fig. 2 shows the centrifugal jet head in plan view, and
  • Fig. 3 shows the jet nozzle in more detail.

Gemäß den Darstellungen weist der Schleuderstrahlkopf eine Strahlkammer 1 in Form eines verhältnismäßig flachen Kastens auf, der an seiner Unterseite eine Öffnung 2 und auf seiner gegenüberliegenden Seite ein auswechselbar montiertes Sicht­fenster 3 aufweist. Das Sichtfenster kann mittels an der Kammerwand anschraubbarer Halteleisten 9 in der Strahlkammer montiert sein, wobei diese einfachen Einzelheiten der Klar­heit halber nicht näher dargestellt sind.According to the illustrations, the centrifugal blasting head has a blasting chamber 1 in the form of a relatively flat box, which has an opening 2 on its underside and an exchangeably mounted viewing window 3 on its opposite side. The viewing window can be mounted in the blasting chamber by means of retaining strips 9 which can be screwed onto the chamber wall, these simple details not being shown in detail for the sake of clarity.

Der die Öffnung 2 der Strahlkammer umschließende Randteil 1a der Strahlkammer 1 trägt ein weichelastisches Dichtungspol­ster 4 zum Aufsetzen der Strahlkammer auf die abzustrahlende Fläche.The edge part 1a of the blasting chamber 1 which surrounds the opening 2 of the blasting chamber carries a soft-elastic sealing pad 4 for placing the blasting chamber on the surface to be blasted.

Auf der in Fig. 1 rechten Seite der Strahlkammer 1 ist eine Strahldüse 5 an der Strahlkammer angeordnet, deren Düsen­achse schräg zur Hauptebene der Öffnung 2 orientiert ist. Auf der mit Bezug auf die Öffnung 2 der Strahldüse 5 gegen­überliegenden Seite der Strahlkammer 1 ist ein Auslaß­stutzen 6 angeordnet, dessen Achse ebenfalls schräg zur Hauptebene der Öffnung 2 orientiert ist, und zwar unter etwa gleichem Winkel wie die Strahldüse 5.On the right side of the blasting chamber 1 in FIG. 1, a blasting nozzle 5 is arranged on the blasting chamber, the nozzle axis of which is oriented obliquely to the main plane of the opening 2. On the opposite side of the blasting chamber 1 with respect to the opening 2 of the blasting nozzle 5 there is an outlet connection 6, the axis of which is also oriented obliquely to the main plane of the opening 2, namely at approximately the same angle as the blasting nozzle 5.

Die Strahldüse 5 ist in Fig. 3 in näheren Einzelheiten, wenn auch immer noch sehr schematisch dargestellt. Sie ist mittels eines Gelenkflanschlagers 7 an der Wand der Strahl­kammer 1 gehaltert, wobei das Gelenkflanschlager eine all­seitige Schwenkung der Strahldüse 5 in dem beispielsweise angegebenen Schwenkwinkelbereich ermöglicht. Gleichzeitig ist die Düse entlang ihrer Längsachse längsverschieblich geführt und wird mittels einer Druckfeder 8 in ihre hintere Stellung vorgespannt. Die Längsverschiebbarkeit der Strahl­düse 5 ist in den Zeichnungen durch den Pfeil x angedeutet. Die Strahldüse 5 befindet sich in Fig. 3 nicht ganz in ihrer hintersten Stellung, um einen Anschlagring 5a am vorderen Ende der Düse deutlicher zu zeigen, der die Verschiebbarkeit der Strahldüse nach hinten durch Anschlag am Gelenkflansch lager begrenzt.The jet nozzle 5 is shown in Fig. 3 in more detail, although still very schematically. It is held on the wall of the blasting chamber 1 by means of an articulated flange stop 7, the articulated flange bearing allowing the jet nozzle 5 to be pivoted on all sides in the swivel angle range specified, for example. At the same time, the nozzle is guided so as to be longitudinally displaceable along its longitudinal axis and is biased into its rear position by means of a compression spring 8. The longitudinal displaceability of the jet nozzle 5 is indicated in the drawings by the arrow x. The jet nozzle 5 is not quite in its rearmost position in FIG. 3 in order to show a stop ring 5a at the front end of the nozzle more clearly, which limits the displaceability of the jet nozzle to the rear by a stop on the articulated flange bearing.

Die Draufsicht nach Fig. 2, in welcher die Strahldüse der Einfachheit halber weggelassen ist, zeigt die in Richtung der Strömung von der Strahldüse (siehe Montageöffnung 1b in der Strahlkammerwand) zum Auslaßstutzen 6 hin trapezartig ver­jüngte Form der Strahlkammer 1 sowie das sich über die gesamte Oberseite der Strahlkammer erstreckende Sicht­fenster 2.The top view according to FIG. 2, in which the blasting nozzle is omitted for the sake of simplicity, shows the shape of the blasting chamber 1 tapering in a trapezoidal manner in the direction of the flow from the blasting nozzle (see assembly opening 1b in the blasting chamber wall) to the outlet nozzle 6, as well as that over the whole Viewing window 2 extending on top of the blasting chamber.

Ein Einlaßrückschlagventil 10 in der Strahlkammerwand (Fig. 1) läßt bei einem Unterdruck in der Strahlkammer Außenluft ein­treten.An inlet check valve 10 in the blasting chamber wall (FIG. 1) allows outside air to enter at a negative pressure in the blasting chamber.

Claims (10)

1. Schleuderstrahlkopf zum Abstrahlen größerer Oberflächen mit in einem Luftstrom geförderten Strahlmittelteilchen, mit
einer auf die abzustrahlende Oberfläche aufzusetzenden, manuell führbaren Strahlkammer (1) mit einer Strahlkammer­öffnung (2), die von einem auf die abzustrahlende Oberfläche aufsetzbaren Randteil (1a) umschlossen ist, und mit einem durchsichtigen Kammerwandbereich (3),
einer in die Strahlkammer ausmündenden und zur Strahlkammer­öffnung hin gerichteten Strahldüse (5), und
einem an der Strahlkammer angeordneten Auslaßstutzen (6) zum Abführen von Förderluft und verbrauchten Strahlmittelteilchen,
dadurch gekennzeichnet, daß
die Strahldüse (5) unter spitzem Winkel zur Ebene der Strahl­kammeröffnung (2) und im wesentlichen seitlich von derselben an der Strahlkammer (1) angeordnet ist,
der Auslaßstutzen (6) im wesentlichen der Strahldüse (5) gegenüberliegend an der Strahlkammer angeordnet ist, und
der durchsichtige Kammerwandbereich als der Strahlkammer­öffnung (2) gegenüberliegendes Sichtfenster (3) ausgebildet ist.1. Centrifugal blasting head for blasting larger surfaces with abrasive particles conveyed in an air stream, with
a manually guided blasting chamber (1) to be placed on the surface to be blasted, with a blasting chamber opening (2) which is enclosed by an edge part (1a) which can be placed on the surface to be blasted, and with a transparent chamber wall area (3),
a blasting nozzle (5) opening into the blasting chamber and directed towards the blasting chamber opening, and
an outlet nozzle (6) arranged on the blasting chamber for discharging conveyed air and used abrasive particles,
characterized in that
the blasting nozzle (5) is arranged at an acute angle to the plane of the blasting chamber opening (2) and essentially to the side thereof on the blasting chamber (1),
the outlet nozzle (6) is arranged essentially opposite the blasting nozzle (5) on the blasting chamber, and
the transparent chamber wall area is designed as a viewing window (3) opposite the blasting chamber opening (2). 2. Schleuderstrahlkopf nach Anspruch 1, dadurch gekenn­zeichnet, daß der Auslaßstutzen (6) unter etwa gleichem Winkel wie die Strahldüse (5) mit Bezug auf die Ebene der Strahl­kammeröffnung (2) orientiert ist.2. Centrifugal blasting head according to claim 1, characterized in that the outlet connection (6) is oriented at approximately the same angle as the blasting nozzle (5) with reference to the plane of the blasting chamber opening (2). 3. Schleuderstrahlkopf nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Strahldüse (5) innerhalb eines gegebenen Schwenkwinkelbereiches allseitig schwenkbar mit der Strahlkammer (1) verbunden ist.3. Centrifugal blasting head according to claim 1 or 2, characterized in that the blasting nozzle (5) is pivotally connected to the blasting chamber (1) on all sides within a given swivel angle range. 4. Schleuderstrahlkopf nach Anspruch 3, dadurch gekenn­zeichnet, daß die Strahldüse (5) in eine mittlere Winkel­position vorgespannt ist.4. centrifugal blasting head according to claim 3, characterized in that the jet nozzle (5) is biased into a central angular position. 5. Schleuderstrahlkopf nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Strahldüse (5) um eine gege­bene Distanz in Richtung ihrer Strahlachse verschiebbar mit der Strahlkammer (1) verbunden ist.5. Centrifugal blasting head according to one of claims 1 to 4, characterized in that the blasting nozzle (5) is connected to the blasting chamber (1) so as to be displaceable by a given distance in the direction of its blasting axis. 6. Schleuderstrahlkopf nach Anspruch 5, dadurch gekenn­zeichnet, daß die Strahldüse (5) durch eine Rückholfeder (8) in ihre hintere Position vorgespannt ist.6. centrifugal blasting head according to claim 5, characterized in that the jet nozzle (5) is biased by a return spring (8) in its rear position. 7. Schleuderstrahlkopf nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Strahlkammer (1) eine ver­hältnismäßig flache, auf der Strahldüsenseite breitere und sich zur Auslaßstutzenseite trapezförmig verjüngende Kasten­form hat.7. Centrifugal blasting head according to one of claims 1 to 6, characterized in that the blasting chamber (1) has a relatively flat box shape which is wider on the blasting nozzle side and tapered trapezoidally towards the outlet nozzle side. 8. Schleuderstrahlkopf nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Sichtfenster (3) auswechselbar an der Strahlkammer (1) montiert ist.8. Centrifugal blasting head according to one of claims 1 to 7, characterized in that the viewing window (3) is interchangeably mounted on the blasting chamber (1). 9. Schleuderstrahlkopf nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Randteil (1a) der Strahl­kammer (1) ein weichelastisches Dichtungspolster (4) aufweist.9. Centrifugal blasting head according to one of claims 1 to 8, characterized in that the edge part (1a) of the blasting chamber (1) has a soft-elastic sealing pad (4). 10. Schleuderstrahlkopf nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Strahlkammer (1) ein auf Unter­druck in der Strahlkammer ansprechendes, das Strahlkammer­innere mit der Außenluft verbindendes Einlaßrückschlag ventil (10) aufweist.10. Centrifugal blasting head according to one of claims 1 to 9, characterized in that the blasting chamber (1) has an inlet check valve (10) which responds to negative pressure in the blasting chamber and connects the blasting chamber interior to the outside air.
EP89112996A 1988-07-15 1989-07-14 Abrasive-blasting head for the blasting of large surfaces by particles carried in a jet of air Withdrawn EP0350965A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8809115U 1988-07-15
DE8809115U DE8809115U1 (en) 1988-07-15 1988-07-15 Centrifugal blasting head for blasting larger surfaces with blasting media particles conveyed in an air stream

Publications (2)

Publication Number Publication Date
EP0350965A2 true EP0350965A2 (en) 1990-01-17
EP0350965A3 EP0350965A3 (en) 1990-04-04

Family

ID=6826023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112996A Withdrawn EP0350965A3 (en) 1988-07-15 1989-07-14 Abrasive-blasting head for the blasting of large surfaces by particles carried in a jet of air

Country Status (2)

Country Link
EP (1) EP0350965A3 (en)
DE (1) DE8809115U1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993024276A1 (en) * 1992-05-27 1993-12-09 Trimmer S.R.L. Portable machine for the abrasive treatment of floors, roads and the like, provided with a straight duct for the recovery of the abrasive material
EP0673717A1 (en) * 1993-09-13 1995-09-27 Antonio Frezzella Process and apparatus with an automatic closed circuit for dirt free cleaning of monuments and buildings
EP0854553A2 (en) * 1997-01-20 1998-07-22 Alexander James Ciniglio Apparatus for stripping a coating from a wire
AU2007258410B2 (en) * 2006-06-14 2011-03-17 Illinois Tool Works Inc. Anchor assembly with large range of motion suspension members, and restraint systems for suspended components
EP3415277A1 (en) * 2017-06-14 2018-12-19 Friedrich Goldmann GmbH & Co. KG Blasting machine for preparing surfaces and protection device for such a blasting machine
CN110328621A (en) * 2019-08-13 2019-10-15 蚌埠市昆宇机械加工厂 A kind of glass part sand blasting unit
EP3578297A1 (en) * 2018-06-04 2019-12-11 Audi Ag Device and method for producing a matt surface
CN111775066A (en) * 2020-06-09 2020-10-16 葛元安 Method for performing shot blasting treatment on workpiece
DE102020124668B3 (en) 2020-09-22 2022-02-17 Audi Aktiengesellschaft Device and method for processing a surface

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9113251U1 (en) * 1991-10-24 1992-02-06 GKSS-Forschungszentrum Geesthacht GmbH, 2054 Geesthacht Device for returning blasting media

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR501557A (en) * 1919-08-19 1920-04-17 Gaston Charles Ory Worker isolation device in sandblasting installations
US4036437A (en) * 1976-02-18 1977-07-19 Alfred J. Dreher Apparatus with reversing linear traverse mechanism for spraying material
GB2072549A (en) * 1980-03-13 1981-10-07 Worldwide Blast Cleaning Ltd Improved surface removing or surface cleaning machine
US4375740A (en) * 1978-05-25 1983-03-08 Jpd Manufacturing Limited Portable abrading cabinet device for recycling abrasive blasting system
US4563840A (en) * 1982-10-11 1986-01-14 Uragami Fukashi Cleaning particle impinging device and air blast cleaning apparatus using said device
DE3446541A1 (en) * 1984-12-20 1986-06-26 Horst 4600 Dortmund Bertulies Process and device for cleaning masonry, in particular for cleaning hot coke ovens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR501557A (en) * 1919-08-19 1920-04-17 Gaston Charles Ory Worker isolation device in sandblasting installations
US4036437A (en) * 1976-02-18 1977-07-19 Alfred J. Dreher Apparatus with reversing linear traverse mechanism for spraying material
US4375740A (en) * 1978-05-25 1983-03-08 Jpd Manufacturing Limited Portable abrading cabinet device for recycling abrasive blasting system
GB2072549A (en) * 1980-03-13 1981-10-07 Worldwide Blast Cleaning Ltd Improved surface removing or surface cleaning machine
US4563840A (en) * 1982-10-11 1986-01-14 Uragami Fukashi Cleaning particle impinging device and air blast cleaning apparatus using said device
DE3446541A1 (en) * 1984-12-20 1986-06-26 Horst 4600 Dortmund Bertulies Process and device for cleaning masonry, in particular for cleaning hot coke ovens

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993024276A1 (en) * 1992-05-27 1993-12-09 Trimmer S.R.L. Portable machine for the abrasive treatment of floors, roads and the like, provided with a straight duct for the recovery of the abrasive material
EP0673717A1 (en) * 1993-09-13 1995-09-27 Antonio Frezzella Process and apparatus with an automatic closed circuit for dirt free cleaning of monuments and buildings
EP0854553A2 (en) * 1997-01-20 1998-07-22 Alexander James Ciniglio Apparatus for stripping a coating from a wire
EP0854553A3 (en) * 1997-01-20 1998-09-23 Alexander James Ciniglio Apparatus for stripping a coating from a wire
AU2007258410B2 (en) * 2006-06-14 2011-03-17 Illinois Tool Works Inc. Anchor assembly with large range of motion suspension members, and restraint systems for suspended components
EP3415277A1 (en) * 2017-06-14 2018-12-19 Friedrich Goldmann GmbH & Co. KG Blasting machine for preparing surfaces and protection device for such a blasting machine
CN112105483A (en) * 2018-06-04 2020-12-18 奥迪股份公司 Device and method for matting surfaces
EP3578297A1 (en) * 2018-06-04 2019-12-11 Audi Ag Device and method for producing a matt surface
WO2019233839A1 (en) * 2018-06-04 2019-12-12 Audi Ag Device and method for matting a surface
CN110328621A (en) * 2019-08-13 2019-10-15 蚌埠市昆宇机械加工厂 A kind of glass part sand blasting unit
CN111775066A (en) * 2020-06-09 2020-10-16 葛元安 Method for performing shot blasting treatment on workpiece
CN111775066B (en) * 2020-06-09 2021-10-15 山东泰恒智能环境科技有限公司 Method for performing shot blasting treatment on workpiece
DE102020124668B3 (en) 2020-09-22 2022-02-17 Audi Aktiengesellschaft Device and method for processing a surface

Also Published As

Publication number Publication date
DE8809115U1 (en) 1988-09-01
EP0350965A3 (en) 1990-04-04

Similar Documents

Publication Publication Date Title
DE3629623C2 (en)
EP1721705B1 (en) Device for abrasive blasting of workpieces
EP1321231A1 (en) Grinding device with suction hood
DE2413086A1 (en) BEAM CLEANING DEVICE
EP0350965A2 (en) Abrasive-blasting head for the blasting of large surfaces by particles carried in a jet of air
EP0631849B1 (en) Method and device for cleaning surfaces
EP0526845A2 (en) Process for grinding plastic material or glass
AT519621B1 (en) Device for processing, in particular cleaning, abrasive removal, engraving or removal of coatings, graffiti or other surface contamination on parts, workpieces or surfaces
DE19614555A1 (en) Abrasive blasting device for model workpiece
DE202005015560U1 (en) Sand blasting system has a vented cabinet with air supply and with position control blasting jet and adjustable internal protective cover for the viewing window
DE10257241B4 (en) Device, in particular workshop and / or Hobbysystem for processing, in particular vacuum suction of surfaces
DE2539762B2 (en) PROTECTIVE AND SUCTION COVER FOR HAND GRINDING AND POLISHING MACHINES
DE9106190U1 (en) Device for processing and cleaning a surface
DE202017104479U1 (en) Device for processing, in particular cleaning, abrasive removal, engraving or removal of coatings, graffiti or other
DE69506176T2 (en) Shot blasting machine for mask molding machine
EP0072985A1 (en) Cleaning device for escalators and moving tracks
DE4407956A1 (en) Sand blasting box for flat material surfaces
DE2904093A1 (en) Centrifugal shot-blast unit for ship&#39;s hull - catches rebounding particles, removes dust in cyclone and returns blast particles for reuse
DE20121272U1 (en) Device, in particular workshop and / or hobby system for processing, in particular vacuum suction, of surfaces
DE29813217U1 (en) Concrete router for milling, especially coated, concrete or screed floors
EP3415277B1 (en) Blasting machine for preparing surfaces and protection device for such a blasting machine
DE29621800U1 (en) Handheld device for cleaning surfaces
DE4023898C1 (en) Grinding machine for spectacle lenses - has self-generated air curtain shielding face of observation window
DE3232994A1 (en) Centrifugal blasting machine
DE3515696A1 (en) Fine-blasting unit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE FR GB IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19900915

DIN1 Information on inventor provided before grant (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KAMMERLOHR, FRIEDRICH

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MICK, ALEXANDRA

17Q First examination report despatched

Effective date: 19920403

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920815