EP3415277B1 - Dispositif laser pour le traitement de surface et dispositif de protection pour un tel dispositif laser - Google Patents

Dispositif laser pour le traitement de surface et dispositif de protection pour un tel dispositif laser Download PDF

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Publication number
EP3415277B1
EP3415277B1 EP17176111.7A EP17176111A EP3415277B1 EP 3415277 B1 EP3415277 B1 EP 3415277B1 EP 17176111 A EP17176111 A EP 17176111A EP 3415277 B1 EP3415277 B1 EP 3415277B1
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EP
European Patent Office
Prior art keywords
blasting
hood
lower edge
hose
guide
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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.)
Active
Application number
EP17176111.7A
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German (de)
English (en)
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EP3415277A1 (fr
Inventor
Klaus-Dieter Goldmann
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Friedrich Goldmann & Co KG GmbH
Original Assignee
Friedrich Goldmann & Co KG GmbH
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Application filed by Friedrich Goldmann & Co KG GmbH filed Critical Friedrich Goldmann & Co KG GmbH
Priority to EP17176111.7A priority Critical patent/EP3415277B1/fr
Publication of EP3415277A1 publication Critical patent/EP3415277A1/fr
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Classifications

    • 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
    • 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
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor

Definitions

  • Dust-free blasting devices have a brush sleeve to seal the surface of the object to be processed, usually a natural stone, so that the blasting head must always be guided horizontally if the required to withdraw the blasting media and the dust with subsequent separation of the dust from the blasting media Sealing should be maintained.
  • a particle blasting device which works dust-free and in which a blasting head with a nozzle is held on a workpiece and the sandblast emerging from the nozzle is operated manually.
  • the jet head rests on the object and is sealed off from the workpiece by means of sealing brushes.
  • the disadvantage here is that it is not possible to see the area to be processed on the surface.
  • Another disadvantage is that machining is only possible in one machining direction perpendicular to the surface, since otherwise the tightness is lost.
  • the blasting head is connected to a dust-free sandblasting device by means of an abrasive hose for feeding the abrasive and with a return hose for the abrasive and the dust.
  • abrasive hose for feeding the abrasive
  • a return hose for the abrasive and the dust.
  • blasting cabins are known, as they are in EP 1 724 063 B1 are described.
  • the WO 2005/095057 A1 describes a blasting device with a blasting head which is arranged rotatably within the housing and executes a predetermined rotational movement.
  • the EP 0 350 965 A2 describes a blasting device with a flexible, movably arranged blasting nozzle (modeling nozzle) and a viewing window.
  • the U.S. 5,601,479 A describes a blasting device with a blasting nozzle arranged movably on the housing in the form of a blasting gun. A viewing window does not seem to be provided.
  • the U.S. 4,095,378 A also describes a blasting device with a rotatable blasting head.
  • the U.S. 4,375,740 A also describes a handleable blasting device with a viewing window and with a blasting gun that can be handled from the outside.
  • the GB 2 021 450 A also describes a manageable blasting device with an externally manageable blasting agent gun.
  • the DE 86 22 315 U1 describes a blasting device with a viewing window with access openings and a flexibly designed hose receptacle within the upper housing wall and a part of the sandblasting hose with nozzle located inside the housing.
  • the blasting device according to the invention with blasting medium return according to independent claim 1 has a nozzle holder with a tip with a modeling nozzle from which the blasting medium emerges in a pressure jet onto an object to be processed.
  • the nozzle holder is movably arranged in a protective device towards the object to be processed and has an at least partially open jet hood, the jet hood having a lower edge for placing on the object to be processed. Above the lower edge there is an air inlet and a discharge nozzle connected to a suction chamber, the suction chamber being arranged opposite the air inlet.
  • the nozzle holder is movably arranged above the lower edge.
  • the jet hood has a viewing window and access openings with sealing rosettes that allow access, or with sealing gloves, to guide the nozzle holder with the modeling nozzle at the tip by hand.
  • the blasting hood also has a hose guide for a blasting agent hose emanating from outside the blasting hood, the blasting agent hose being guided into the interior of the blasting hood via the guide.
  • the use of a jet hood allows the creation of ornaments and plastic decorations without the need for a large cabin. Such cabins are very expensive and require a corresponding amount of space.
  • the blasting device can, on the one hand, enable sufficient return of blasting medium and abrasion and, with good placeability, provide a sufficient seal.
  • the nozzle holder on the sandblasting hose can be moved freely upwards, downwards and to each side within the hood.
  • the viewing window enables the user to optically follow the nozzle holder with the modeling nozzle during processing.
  • the viewing window can be spaced from the lower edge.
  • Access openings with sealing rosettes or sealing gloves have the advantage that the escape of blasting media during manual handling is reduced or prevented.
  • a hose guide makes it easier to move or catch up with the abrasive hose to align the nozzle holder with the workpiece.
  • the hose is sufficiently flexible to allow safe handling.
  • the hose can also have a bellows opposite the guide be sealed and at the same time be longitudinally movable.
  • the air inlet can advantageously be at least one opening in the housing wall of the jet hood and the opening can be covered by means of a shielding plate arranged at a distance from the air inlet relative to the interior of the hood, the shielding plate being set back in height relative to the lower edge, so that When the jet hood is placed on the object to be processed, a gap is created between the shielding plate and the object.
  • the lower edge advantageously has a low-friction coating facing the object. This makes it possible to move the jet hood along the surface with less effort.
  • PTFE comes into consideration as a material, with a layer thickness of less than 1 mm being sufficient.
  • the lower edge can advantageously have a seal made of an elastically deformable material.
  • a suitable material for this is, for example, a pore rubber such as foam rubber.
  • a brush strip with bristles can be arranged around the lower edge, which can in particular assume at least two operating states, namely on the one hand a sealing position protruding laterally and downward over the lower edge and a neutral position in which the bristles of the brush strip are above the lower edge . This can damage the bristles can be avoided during transport or storage of the jet hood.
  • the jet hood can taper away from the lower edge upwards, that is to say towards the user, and can in particular be conical in shape. This improves the handling of the jet hood.
  • the guide can preferably surround the hose with the formation of a narrow gap, in particular less than 1 mm, and thereby have a length which corresponds at least to the hose diameter.
  • a guide means for the blasting hose in particular a guide roller, can be arranged on the blasting hood at a distance from the hose guide.
  • the blasting agent hose aligns itself in a low-friction and kink-free manner for guidance in the blasting hood and length compensation is possible if the user wants to align the nozzle differently.
  • the inside of the hood can be provided with a wear-reduced elastic coating. Since the abrasive used inside the blasting hood has an abrasive effect, the service life can be extended.
  • the viewing window and the cover plate for the interior lighting can also have a wear-reducing coating, which, however, must be transparent.
  • Another object of the invention is a protective device for a blasting device according to claim 10 for processing an object by means of a blasting agent, which has a blasting hood with a lower edge for placing on the object to be processed, the blasting hood has a lower edge to be placed on the object to be processed and an air inlet arranged above the lower edge as well as a discharge nozzle also arranged above the lower edge with a corresponding suction chamber, which is arranged opposite the air inlet and has at least one viewing window and furthermore having one in one Hose guide arranged on the side wall of the hood for a blasting agent hose that extends from outside the blasting hood and is guided into the interior of the blasting hood.
  • Such a jet hood can be used as a protective device in a jet device.
  • the guide can advantageously surround the hose with the formation of a narrow gap, in particular ⁇ 1 mm, and preferably have a length which corresponds at least to the hose diameter. This ensures good feed and adequate sealing.
  • the hose can be sealed off from the guide by means of a bellows and at the same time can be displaced in a longitudinally movable manner.
  • the suction chamber can advantageously have a flow plate which is set back in height relative to the lower edge and has a gap to the object. This provides a suction cross-section that is uniform over the width of the suction chamber.
  • the flow cross-section of the suction chamber can increase towards the extraction nozzle, so that sufficient space is available for the sucked-in air over the entire length of the suction chamber.
  • the jet hood according to the invention can be conical and either angular or round.
  • a viewing window The tip of the jet hood allows a view of the modeling nozzle, the viewing window being easily exchangeable so that it can be exchanged in the event that the view is clouded due to wear and tear.
  • the blasting device is operated either via a foot or hand switch, which interacts with the blasting device and switches the provision of the blasting agent on and off on the one hand and the blasting medium recovery on the other.
  • the jet hood 1 has side walls 3a-3d extending from the lower edge 2 in a direction away from the object, of which a left side wall 3b as seen by a user and a rear side wall 3c, also referred to as the rear wall, are shown.
  • the front side wall 3a facing the user and the right side wall 3d can be seen in this illustration via an exchangeable viewing window 4 on the upper edge 5 of the jet hood 1, which gives the user a view from above of a viewpoint arranged in the jet hood in FIG Fig. 2 modeling nozzle 6 shown allows.
  • the cross-section of the inlet openings is dimensioned such that the air inlet 10 overall enables a sufficient flow of air into the interior of the jet hood 1 and the resulting air flow reaches a sufficient flow speed to remove particles of the blasting material and the processed object over the entire base area of the jet hood To carry away the suction chamber 8.
  • the minimum speed is assumed here to be 18 m / s, as otherwise blasting media will fail.
  • a return hose (not shown) for returning the blasting agent and the dust to a blasting device (not shown) with dust separation is connected to the suction nozzle 7.
  • the negative pressure generated in the blasting device and transferred to the suction chamber via the return hose and the suction nozzle ensures the cross-flow and return of the blasting agent in the blasting hood.
  • the jet hood on the side wall 3d having the air inlet has an inflow chamber delimited by a shielding plate 11, into which the air coming from the inlet openings 10 flows and which has a flow gap 12 with the surface of the object to be processed when the jet hood hits the object is placed in order to provide an air flow L that is as uniform as possible over the entire base area of the jet hood 1 in the area of the surface to be processed.
  • the air flow L illustrated by the arrows then flows out of this gap 12 to the suction chamber 8 located on the opposite side, which has the flow plate 8 'with the gap 9, and then from the suction chamber 8 into the exhaust nozzle 7, to which a dedusting system is connected which provides a retraction of the abrasive, as it is known from dust-free blasting devices with withdrawal of the blasting agent and separation of the dust.
  • a seal 13 made of an elastically deformable material such as rubber or another elastomer is provided on the lower edge 2 of the jet hood 1, which is used when the jet hood 1 is placed on the object to be processed to seal the interior from the environment.
  • the jet hood 1 has a guide 14 for a sandblasting hose 15 on the side wall 3c below the upper edge 5, which is guided via this guide 14 from outside the jet hood 1 into the interior of the jet hood 1.
  • a guide means 16 in the form of a guide roller for the sandblasting hose 15 is arranged on the blasting hood 1 at a distance from the guide 14 in order to facilitate the feeding of the sandblasting hose 15.
  • the hose has to be longer or shorter inside the hood and if it is bent, for example to hold the nozzle at an angle to the user, it must be particularly long.
  • the jet exits perpendicular to the surface and removes material from the surface below the jet.
  • the sandblasting hose 15, which is introduced essentially centrally into the blasting hood 1, is fairly straight and usually short, unless the blasting in the blasting hood is at a significant distance from the guide 14.
  • the jet hood 1 also has an engagement opening 17 arranged on each of the side walls 3b, 3d, which is at least partially sealed with a sealing rosette 18 or closed with sealing gloves (not shown) so that the user can use the modeling nozzle 6 ( Fig. 2 ) can lead manually.
  • an interior lighting 19 is shown in the rear wall 3c below the guide 14, which improves the view of the object to be processed and thus facilitates the guidance of the modeling nozzle for the user.
  • the illuminant of the interior lighting 19 can be replaced from the outside.
  • the light is fed into the hood via a recess 20 in the rear wall 3b, which is closed by a transparent cover 21.
  • This cover 21 like the viewing window 4, can be exchangeable in order to be exchanged in the event of wear.
  • a modeling nozzle 6 is attached, with which the sandblast emerging from the nozzle under pressure can be manually guided so that, due to the flexibility of the sandblasting hose 15, the blasting agent jet is inclined at an angle compared to a surface to be processed is possible. In this way, ornaments with inclined surfaces and, if necessary, undercuts can be produced in the surface to be processed.
  • the beam hood shown is additionally sealed at the lower edge 2 by means of a brush seal 31.
  • the interior lighting 19 is arranged on the side wall 3c.
  • the bristles 33, 33 ' are so soft that they rest on the stone and compress where it is high, shown as bristles 33', but also penetrate into the recess of the workpiece, shown as bristles 33, in order then, together with the negative pressure that prevails in the hood via the back suction of the blasting device, to ensure a sufficient seal.
  • the brush strip 32 can be pivoted around the joint 34 away from the lower edge 2 into a neutral position towards the side wall 3a, so that it can only be used as required.
  • the light is fed into the hood via a recess 20 in the rear wall 3b, which is closed by a transparent cover 21.
  • This cover 21 like the viewing window 4, can be exchangeable in order to be exchanged in the event of wear.
  • the interior lighting 19 can be opened from the outside via a detachable connection 22.
  • a heat sink 23 ( Fig. 4 ) provided, but this can be omitted if there is no great heat development.
  • a seal between the guide 14 and the hose 15 is shown by means of a bellows 41 which is tightly attached to the guide 14 on the one hand and to the hose 15 on the other. Due to the deformability of the With bellows in the longitudinal direction, the hose 15 can be drawn into the interior space over a certain length and pushed out of the interior space when the operator guides the nozzle 6 over the surface to be processed.
  • the extraction nozzle and the suction chamber are connected to the suction of the known dust-free blasting device of the dust-free blasting device by means of a suction hose.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Cleaning In General (AREA)

Claims (14)

  1. Dispositif de projection à récupération d'abrasif, présentant un porte-buse (6) avec une pointe munie d'une buse de façonnage, par laquelle l'abrasif est diffusé dans un jet sous pression (6') sur un objet à traiter, dans lequel le porte-buse (6) est disposé de façon mobile dans un dispositif de protection, qui comporte un caisson de projection (1) au moins en partie ouvert en direction de l'objet, dans lequel le caisson de projection (1) présente un bord inférieur (2) à poser sur l'objet à traiter et une prise d'air (10) disposée au-dessus du bord inférieur (2) ainsi qu'une tubulure d'évacuation (7) également disposée au-dessus du bord inférieur (2) avec une chambre d'aspiration (8), qui est disposée à l'opposé de la prise d'air (10), dans lequel le porte-buse (6) est disposé de façon mobile au-dessus du bord inférieur (2), dans lequel le caisson de projection (1) comporte au moins un hublot (4), caractérisé en ce que le caisson de projection (1) présente des ouvertures d'accès (17) pourvues de rosaces d'étanchéité (18) ou de gants d'étanchéité servant à manipuler le porte-buse (6) avec la buse de façonnage sur la pointe, et que le caisson de projection comporte un guide de tuyau (14) destiné à un tuyau d'abrasif (15) sortant du caisson de projection, dans lequel le tuyau d'abrasif (15) est acheminé par le guide (14) à l'intérieur du caisson de projection (1).
  2. Dispositif de projection selon la revendication 1, caractérisé en ce que la prise d'air (10) consiste au moins en une ouverture (10) dans une paroi latérale (3d) du caisson de projection et que l'ouverture (10) est recouverte vis-à-vis de l'intérieur du caisson de projection (1) au moyen d'une tôle de protection (11) disposée à une certaine distance de la prise d'air, dans lequel la tôle de protection (11) est en retrait en hauteur par rapport au bord inférieur (2), de sorte qu'un interstice (12) s'établit entre la tôle de protection (11) et l'objet lorsque le caisson de projection (1) est posé sur l'objet à traiter.
  3. Dispositif de projection selon la revendication 1 ou 2, caractérisé en ce que le bord inférieur (2) présente un revêtement (x) à faible frottement tourné vers l'objet.
  4. Dispositif de projection selon l'une des revendications 1 à 3, caractérisé en ce que le bord inférieur (2) présente un joint d'étanchéité (13) à base d'un matériau déformable de manière élastique.
  5. Dispositif de projection selon l'une des revendications 1 à 4, caractérisé en ce qu'un joint brosse (32) à poils (33) est disposé tout autour du bord inférieur (2), qui peut prendre notamment au moins deux états de fonctionnement, à savoir d'un côté une position d'étanchéité dépassant le bord inférieur latéralement et vers le bas et une position neutre, dans laquelle les poils (33) du joint brosse (32) se trouvent au-dessus du bord inférieur (2).
  6. Dispositif de projection selon l'une des revendications 1 à 5, caractérisé en ce que le caisson de projection (1) se rétrécit du bord inférieur (2) vers le haut, en particulier sous une forme conique.
  7. Dispositif de projection selon l'une des revendications 1 à 6, caractérisé en ce que le guide (14) entoure de préférence le tuyau (15) moyennant la formation d'un interstice étroit (14'), notamment inférieur à 1 mm, et présente alors une longueur, qui correspond au moins au diamètre du tuyau.
  8. Dispositif de projection selon l'une des revendications 1 à 7, caractérisé en ce qu'un moyen de guidage (16) du tuyau (15), en particulier un galet de guidage, est disposé sur le caisson de projection (1) à une certaine distance par rapport au guide de tuyau (14) pour compenser la longueur du tuyau (15).
  9. Dispositif de projection selon l'une des revendications 1 à 8, caractérisé en ce que le caisson de projection est pourvu d'un revêtement (x) élastique réduisant l'usure sur sa face intérieure.
  10. Dispositif de protection d'un dispositif de projection destiné au traitement d'un objet au moyen d'un abrasif, qui comporte un caisson de projection (1) au moins en partie ouvert en direction de l'objet, dans lequel le caisson de projection (1) présente un bord inférieur (2) à poser sur l'objet à traiter et une prise d'air (10) disposée au-dessus du bord inférieur (2) ainsi qu'une tubulure d'évacuation (7) également disposée au-dessus du bord inférieur avec une chambre d'aspiration correspondante (8), qui est disposée à l'opposé de la prise d'air (10), et comporte au moins un hublot (4), caractérisé en ce qu'un guide de tuyau (14) disposé dans une paroi latérale (3c) du caisson est prévu pour faire cheminer un tuyau d'abrasif (15) sortant par le caisson de projection (1) à l'intérieur du caisson de projection (1).
  11. Dispositif de protection selon la revendication 10, dans lequel le guide (14) entoure le tuyau (15) moyennant la formation d'un interstice étroit (14'), notamment < 1 mm, et présente de préférence une longueur, qui correspond au moins au diamètre du tuyau.
  12. Dispositif de protection selon la revendication 10, dans lequel le guide (14) entoure le tuyau (15), qui est étanchéifié par rapport au guide au moyen d'un soufflet (41) et peut être déplacé longitudinalement.
  13. Dispositif de protection selon l'une des revendications 10 à 12, caractérisé en ce que la chambre d'aspiration (8) présente une tôle d'écoulement (8'), qui est en retrait en hauteur par rapport au bord inférieur (2) et qui présente un interstice (9) à l'objet.
  14. Dispositif de protection selon la revendication 13, caractérisé en ce que la section transversale d'écoulement de la chambre d'aspiration (8) s'accroît en direction de la tubulure d'évacuation (7).
EP17176111.7A 2017-06-14 2017-06-14 Dispositif laser pour le traitement de surface et dispositif de protection pour un tel dispositif laser Active EP3415277B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17176111.7A EP3415277B1 (fr) 2017-06-14 2017-06-14 Dispositif laser pour le traitement de surface et dispositif de protection pour un tel dispositif laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17176111.7A EP3415277B1 (fr) 2017-06-14 2017-06-14 Dispositif laser pour le traitement de surface et dispositif de protection pour un tel dispositif laser

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EP3415277A1 EP3415277A1 (fr) 2018-12-19
EP3415277B1 true EP3415277B1 (fr) 2021-05-12

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US4095378A (en) * 1975-12-18 1978-06-20 Uragami Fukashi Device capable of suction-adhering to a wall surface and moving therealong
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DE8622315U1 (de) * 1986-08-20 1986-10-16 Friedrich Goldmann GmbH & Co, 6800 Mannheim Sandstrahlvorrichtung mit Bestückungsanlage
DE8809115U1 (de) * 1988-07-15 1988-09-01 Mick, Alexandra, 8891 Obergriesbach Schleuderstrahlkopf zum Abstrahlen größerer Oberflächen mit in einem Luftstrom geförderten Strahlmittelteilchen
DE8815023U1 (de) 1988-12-02 1989-01-19 Friedrich Goldmann GmbH & Co, 6800 Mannheim Bausatz zur Sicherheitsabschaltung für Partikelstrahlgeräte
US5601479A (en) * 1994-09-28 1997-02-11 Santos; Eugene W. Method and apparatus for decontaminating structures
DE29719266U1 (de) * 1997-10-19 1997-12-11 GP- Granulate Pneumatic Gerätebau GmbH, 03222 Lübbenau Vorrichtung zum trockenen Entfernen von Beschichtungen, Graffiti und sonstigen oberflächlichen Verunreinigungen
FR2802838B1 (fr) * 1999-12-27 2002-06-21 Lefevre Sa M Dispositif de nettoyage par projection notamment pour facade
DE202004005386U1 (de) * 2004-04-01 2004-06-17 Krumm, Wolfgang, Prof. Dr.-Ing. Reinigungsanlage, insbesondere Entzunderungsanlage
DE202005007992U1 (de) 2005-05-21 2005-08-25 Friedrich Goldmann Gmbh & Co. Sandstrahlvorrichtung
DE102008013697A1 (de) * 2008-03-11 2009-09-17 Friedbert Dambach Vorrichtung zum Schutz eines Sichtfensters

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