EP1384554B1 - Appareil de sablage - Google Patents

Appareil de sablage Download PDF

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Publication number
EP1384554B1
EP1384554B1 EP20030014905 EP03014905A EP1384554B1 EP 1384554 B1 EP1384554 B1 EP 1384554B1 EP 20030014905 EP20030014905 EP 20030014905 EP 03014905 A EP03014905 A EP 03014905A EP 1384554 B1 EP1384554 B1 EP 1384554B1
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EP
European Patent Office
Prior art keywords
abrasive
blasting device
blast wheel
drive motor
mixing chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP20030014905
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German (de)
English (en)
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EP1384554A1 (fr
Inventor
Jennifer Schlick
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B24C5/068—Transferring the abrasive particles from the feeding means onto the propeller blades, e.g. using central impellers

Definitions

  • the present invention relates to a blasting device for the machining of workpiece surfaces by means of a granular blasting medium, with a drivable, rotatable about a rotation axis impeller with centrifugal blades, with a blast wheel surrounding Bluderradgephasepuruse with a Strahlstoffausschö réelle, with a Strahlstoffzu admir for the supply of the blasting agent, with a front the blast wheel in the region of a blasting medium-air mixing chamber in the blasting medium supply line opening compressed air supply line and with a subsequent to the mixing chamber.
  • Introductory channel for the blasting agent-air mixture the inner end of which lies radially inwardly of the centrifugal blades inside the impeller and points in the radial direction of the impeller, wherein the compressed air in a direction substantially in the direction of.
  • Introductory channel facing direction is blown into the mixing chamber and wherein the lying in the interior of the bladder housing part of the introduction channel has such a curvature up to its free end, that the free end in the radial direction of the centrifugal blades ends pointing immediately before the radially inner edge.
  • a jet device of the type mentioned is known from US-A-6,126,516.
  • the longitudinal direction of the blasting medium-air mixing chamber is substantially coaxial with the axis of rotation of the blasting wheel.
  • the blasting medium feed line emanates coming from above at an oblique angle in the mixing chamber.
  • the compressed air supply line also runs approximately coaxially to the axis of rotation of the centrifugal wheel and coincides in its longitudinal direction with the longitudinal direction of the mixing chamber.
  • a deflecting body is arranged, within which the blasting agent-air mixture generated in the mixing chamber undergoes a deflection of about 90 °.
  • the blasting medium-air mixture initially moving in a direction parallel to the axis of rotation of the blast wheel is deflected by 90 ° and transferred in the radial direction of the blast wheel into the intermediate spaces between the latter's centrifugal blades.
  • a disadvantage is considered in this known jet device that takes place in the center of the impeller within the deflecting there arranged a sharp deflection of the blasting agent-air mixture with a small radius of curvature.
  • the surface of the deflecting body in particular on the outer side of the deflection curve, is subjected to high stress and is severely worn during operation of the blasting device. Therefore, it is necessary here to use a particularly hard material for the deflection body to achieve at least sufficient service life.
  • the production of the deflecting body is made more expensive by high material costs and high processing costs, which noticeably affects the overall costs of the blasting device.
  • US-A-2 632 980 shows a wet jet device.
  • a mixture of a liquid, such as water, and blasting agent from a sump forming part of the device is transported by means of a screw conveyor in a feed pump.
  • the feed pump leads the mixture to a blast wheel.
  • the promotion of the mixture of liquid and blasting agent by means of the pump is described in the form of a suspension. It is emphasized that the pump promotes the suspension slowly, the speed must only be so high that the blasting agent particles remain dynamically suspended in the liquid. This is in Liquids at a much slower rate than air because liquids have much higher densities than air.
  • An advantage of the low conveying speed expressly mentioned in this document is a low wear of the pump and, although not expressly mentioned, of course also the subsequent line for the supply of the suspension to the blast wheel. Only in the blast wheel, the suspension is brought to a high speed.
  • the problem of wear in the introduction channel for introducing the suspension into the impeller is not discussed here, because regardless of the shape and the course of the introduction channel in the vicinity of the impeller only a small amount of wear occurs, since the suspension of liquid and blasting medium flows slowly , An air flow for the fluidization of the blasting agent and for its promotion by the introduction channel into the impeller is not used here.
  • the document DE 685 138 C shows a jet device in which the blasting agent is fed by suction against the force of gravity from bottom to top of the blast wheel.
  • the introduction of the blasting medium into the blast wheel also takes place here with a sharp deflection of about 90 ° in a manifold at the end of the introduction channel.
  • This sharp deflection leads to wear, but this is not so dramatic here, because the abrasive is only sucked.
  • the flow velocity of the air is therefore limited and, in particular, significantly lower than the flow velocity of blowing air emerging from one or more nozzles.
  • a guide of the blasting agent in a different manner than from the bottom up is not technically possible with this jet device, because otherwise very easy the introduction channel Blasting agent would fill up and thus would be clogged, causing the device loses its functionality.
  • the task is to provide a jet device of the type mentioned above, which avoids the disadvantages listed and in particular a highly stressed deflecting in the center of the impeller is no longer needed, in which the centrifugal blades of the impeller uniform with the blasting agent Air mixture are applied and which is operable without external compressed air supply.
  • the desired and advantageous for the promotion of the blasting agent-air mixture fluidization of the mixture is achieved in the jet device according to the invention with high reliability and good effect, so that a high and uniform abrasive flow rate and thus high performance of the jet device are guaranteed. Since only a flat curvature in the region of the introduction channel is traversed during the supply of the blasting agent-air mixture in the interstices between the centrifugal blades, the centrifugal forces on the blasting agent particles hardly affect here, whereby the desired uniform loading of the centrifugal blades with the blasting agent and thus the desired uniform spray pattern can be achieved on a workpiece to be machined.
  • jet device is completely independent of an external compressed air supply, because the compressed air supply is integrated into the jet device.
  • the existing for the drive of the blast wheel drive motor is at the same time for the drive of the compressor wheel of the air compressor used.
  • the jet device requires only a single drive motor.
  • a first embodiment of the jet device is further provided that an output shaft of the drive motor at a first end of the drive motor led out of this and with the impeller, which is arranged in front of the first end of the drive motor, and that the same or a second output shaft of the drive motor at a second end face of the drive motor led out of this and connected to the compressor wheel of the air compressor, which is arranged in front of the second front end of the drive motor.
  • An alternative embodiment in this respect provides that the air compressor is mounted transversely to the axis of rotation of the drive motor offset to the rest of the jet device and that the compressor of the air compressor is rotatably driven via a transmission gear from the drive motor.
  • This embodiment of the jet device has the particular advantage that the air compressor can be operated with a different speed from the speed of the centrifugal wheel. In particular, hereby the possibility is created to drive the compressor wheel of the air compressor at a higher speed than the spinner.
  • the mentioned transmission gear is preferably a belt transmission or a gear transmission.
  • the belt transmission has the advantage of a simple construction and a largely maintenance-free.
  • the gear transmission has the special advantage that higher ratios can be achieved within a given space.
  • the drive motor of the jet device is preferably an electric motor, preferably with variable speed.
  • the jet device then requires only an electrical energy supply for its drive motor, for example 220 or 380 V AC from a public supply network.
  • an electrical energy supply for its drive motor for example 220 or 380 V AC from a public supply network.
  • At least one adjustable member is provided on the air compressor and / or in the course of the compressed air line for influencing the pressure and / or amount of the compressed air introduced into the mixing chamber.
  • the longitudinal direction of the part of the introduction channel leading into the blower wheel housing forms an angle ⁇ between about 30 and 60 ° relative to the axis of rotation of the blower wheel.
  • the mixture then only has to be deflected by the remaining angle, which remains up to 90 °, until the blasting medium / air mixture is transferred to the blast wheel.
  • the maximum size of the angle ⁇ is technically limited by the free diameter in the center of the impeller between the radially inner edges of the centrifugal blades and the diameter of the introduction channel, which must not be less than a certain minimum.
  • the jet device seen in the direction of the axis of rotation of the impeller of the introduction channel in an angular range of ⁇ 45 ° to the vertical direction upwards or obliquely upwards.
  • a certain angle within the specified angular range of the area is determined in the circumferential direction of the impeller, within which the transfer of the blasting medium-air mixture takes place in the spaces between the centrifugal blades. In this way it can then be determined over which circumferential angle range the blasting agent-air mixture is accelerated within the impeller before the blasting medium is ejected.
  • the beam effect and the spray pattern can be adapted to different requirements of different applications.
  • the introduction channel is connected by means of a releasable flange connection with the blower wheel housing or with a surrounding outer housing of the jet device.
  • the releasable flange provides the opportunity to exchange the introduction channel for another introduction channel with another angular position or the same insertion channel in another angular position again with the rest of Strahlhle direction connect to. In this way, at least a graded change of said angle is possible.
  • the flange is designed as a rotatable and fixable in desired rotational positions flange. In this way, a virtually continuous adjustment of the desired angle and its definition is possible.
  • the angle can be individually adjusted depending on the application to always achieve the best possible beam result.
  • a further embodiment of the jet device according to the invention is characterized in that at least one nozzle built into a wall of the mixing chamber is provided for blowing the compressed air into the mixing chamber.
  • a particularly high exit velocity of the compressed air is achieved, which causes a particularly intensive fluidization of the blasting agent by generating the jet center-air mixture.
  • the nozzle is preferably easy to replace in the event of damage or wear.
  • the invention proposes further that the axial position of the nozzle in the wall of the mixing chamber and / or the Ausblaschal the nozzle is adjustable relative to the longitudinal direction of the introduction channel and fixable in desired positions.
  • Another measure for influencing the function and effect of the jet device according to the invention consists in providing at least one adjustable element for influencing the quantity of the blasting medium introduced into the mixing chamber per unit of time in the blasting agent feed line for supplying the blasting medium to the mixing chamber.
  • the first exemplary embodiment of a blasting device 1 shown here has a blast wheel 2, which is rotatably mounted about an axis of rotation 24 in the interior of a blast wheel housing 22.
  • the blower wheel housing 22 is surrounded by an outer housing 10.
  • the outer housing 10 comprises a base plate 11, two left and right of the blast wheel 2 and the Bluderradgephaseuse 22 lying end walls 12, 12 'and a peripheral wall thirteenth
  • a blasting medium supply line 3 is arranged, which here has the shape of an upwardly open pipe socket.
  • the blasting medium supply line 3 forming pipe socket may be followed by another supply line or a storage hopper or an allocation device for the supplied blasting agent, as is customary in relevant jet devices.
  • the blasting medium feed line 3 merges into a blasting medium / air mixing chamber 30. This mixing chamber is located substantially below the axis of rotation 24 approximately at half the height of the radius of the centrifugal wheel 2.
  • a nozzle 4 which serves for blowing compressed air into the mixing chamber 30.
  • the mixing chamber 30 is adjoined by an introduction channel 31, through which the blasting medium-air mixture produced by means of the compressed air can be guided obliquely from bottom to top into the center of the impeller 2.
  • the mixing chamber 30 is well below the axis of rotation 24 of the impeller 2 and accordingly runs the Introductory channel 31 of the mixing chamber 30 obliquely upward into the interior of the outer housing 10, the Lüfterradgepuruses 22 and the impeller 2 itself.
  • the upper end portion 31 'of the insertion channel 31 lies inside the impeller 2.
  • the impeller 2 is made of a flat base disk 20th and a plurality of radially extending centrifugal blades 21 formed thereon.
  • the upper end region 31 'of the introduction channel 31 ends immediately in front of the radially inner edges 21' of the centrifugal blades 21 and points there in the radial direction of the centrifugal wheel 2.
  • a blasting medium for example small steel or glass balls
  • a blasting medium feed line 3 Compressed air is blown into the mixing chamber 30 through the nozzle 4, which results in a fluidization of the blasting agent through the formation of a blasting medium-air mixture.
  • This blast media-air mixture is conveyed by the compressed air from the nozzle 4 through the introduction channel 31 obliquely upward.
  • the introduction channel 31 forms with the axis of rotation 24 of the centrifugal wheel 2 in the present example an angle ⁇ of about 45 °.
  • the introduction channel 31 In the inside of the impeller 2 lying end portion 31 'of the introduction channel 31 is a gentle deflection of the blasting agent-air mixture by about 45 °, so that ultimately the blasting agent-air mixture in the radial direction in the spaces between the centrifugal blades 21 of the impeller. 2 transgresses.
  • the blasting agent By rotation of the impeller 2, the blasting agent is accelerated in the circumferential direction of the impeller 2 and ejected by a downwardly pointing blasting media ejection opening 23 on a not shown here, to be machined by blasting workpiece.
  • the insertion channel 31 is supported in the left end wall 12 of the outer housing 10 by means of a flange 32.
  • This flange 32 is designed as a rotatable and fixable in desired rotational positions flange. In this way, the direction of the introduction channel 31 can be adjusted relative to the vertical direction. This adjustment is later illustrated and described with reference to FIG 2.
  • an electric motor 5 which is connected by means of a flange 51 with the outer housing 10, here the right end wall 12 '.
  • a driven out to the left from the drive motor 5 output shaft 52 is rotationally connected to the impeller 2, here with the base disk 20, connected.
  • the exemplary embodiment of the jet device 1 shown in FIG. 1 comprises an air compressor 6.
  • This air compressor 6 is flanged onto the end face of the drive motor 5 opposite the blower wheel 2.
  • a second flange 55 is provided at this point.
  • the drive of a rotatably mounted in the air compressor 6, not visible here compressor wheel via a second output shaft 56 which is led out to the right out of the drive motor 5 and there is rotationally connected to the compressor wheel of the air compressor 6.
  • the drive motor 5 which is preferably a variable speed electric motor, both at the same speed and both the impeller 2 and the air compressor 6 at.
  • An output 64 of the air compressor 6 is connected via a compressed air line shown here only as a dotted line with a compressed air supply line 40, which in turn is connected to the nozzle 4.
  • a compressed air supply line 40 which in turn is connected to the nozzle 4.
  • FIG. 2 of the drawing shows the blasting device 1 from FIG. 1 in an end view according to the viewing direction II in FIG. 1.
  • the blasting medium feed line 3 can be seen with the mixing chamber 30 adjoining it downwards.
  • the nozzle 4 with its compressed air supply line 40 is not shown here for reasons of clarity.
  • the introduction channel 31 extends upwards and into the interior of the outer housing 10.
  • the introduction channel 31 is, as mentioned above, by means of a rotatable flange connection 32 which can be fixed in desired rotational positions with the end wall 12 of the outer housing 10 facing the observer connected. This makes it possible to adjust the insertion channel 31 in an angular range of about ⁇ 45 ° to the vertical direction 33.
  • the two extreme rotational positions are additionally illustrated by dashed lines in FIG.
  • the particles of the blasting agent arrive in different positions in the blast wheel 2, depending on the respectively set rotational position of the introduction channel 31 relative to the vertical direction 33. Accordingly, the circumferential angle over which the blasting medium is accelerated by the blast wheel 2 also differs large. It is this Circumferential angle the greater, the more the introduction channel 31 is rotated counterclockwise to the left, and the smaller, the more the introduction channel 31 is rotated clockwise to the right.
  • the discharge of the blasting agent takes place downwards through the blasting agent ejection opening 23 recessed there in the base plate 11.
  • the coverable blasting area on the surface of a workpiece, not shown here, is illustrated by a bundle of dashed blasting arrows.
  • FIG. 3 of the drawing shows a side view of two possible modifications of the jet device 1 according to FIG. 1.
  • blast wheel 2 outer housing 10, blasting medium supply line 3, blasting medium-air mixing chamber 30, nozzle 4, compressed air supply line 40 and drive motor 5 corresponds to the previously described exemplary embodiment according to FIG. 1 in the blasting device 1 according to FIG.
  • the air compressor 6 is no longer located at the right front end of the drive motor 5, but at two deviating, optionally possible positions.
  • a first position in which the air compressor 6 can alternatively be arranged is above the left side of the drive motor 5, as shown there in dashed lines.
  • the drive of the air compressor 6 belonging, not visible compressor wheel takes place here via a transmission gear 65, which is a belt transmission with two V-belts.
  • the output shaft 52 of the drive motor 5, which is connected to the spinner 2 has Here, in addition, one or more pulleys, which form the transmission gear 65 together with a second pulley rotationally connected to the fan and guided on the pulleys V-belt.
  • the air compressor 6 may be arranged over the right half of the drive motor 5, as there is also indicated in dashed lines.
  • the drive of the fan wheel of the air compressor 6 takes place here in the illustrated example also via a trained as a belt transmission transmission gear 65th
  • the output 64 of the air compressor 6 is again connected via a compressed air line 41 to the compressed air supply line 40 and the nozzle 4. Due to the transmission gear 65 while the air compressor 6, more precisely, the fan wheel can be driven at a speed that differs from the speed of the centrifugal 2. In this way, a sufficient amount and a sufficiently high pressure of the compressed air for the generation of the blasting medium-air mixture in the mixing chamber 30 are in this case a sufficient amount and a sufficiently high drive pressure of the fan wheel at a speed greater than the speed of the impeller Made available, so that an external compressed air supply is not necessary.
  • the jet device 1 in its embodiments according to FIG. 3 also comes with a single drive motor 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (14)

  1. Appareil à jet abrasif (1) pour le traitement de surfaces de pièces à travailler au moyen d'un agent granuleux d'abrasion par jet, comprenant une roue de projection (2) entraînable, rotative autour d'un axe de rotation (24), pourvue de palettes de projection (21), avec un carter de roue de projection (22) pourvu d'un orifice de sortie de l'agent d'abrasion par jet (23), lequel carter entoure la roue de projection (2), avec une conduite d'amenée d'agent d'abrasion par jet (3) pour amener l'agent d'abrasion par jet, avec une conduite d'amenée d'air comprimé (40) débouchant dans la conduite d'amenée d'agent d'abrasion par jet (3) devant la roue de projection (2) dans la zone d'une chambre de mélange d'air et d'agent d'abrasion par jet (30) et avec un canal d'introduction (31) du mélange air - agent d'abrasion par jet faisant suite à la chambre de mélange (30), canal dont l'extrémité interne, à l'intérieur de la roue de projection (2), se trouve radialement à l'intérieur des palettes de projection (21) de celle-ci et est orientée dans le sens radial de la roue de projection (2), l'air comprimé pouvant être insufflé dans la chambre de mélange (30) dans une direction allant sensiblement dans le sens du canal d'introduction (31) et la partie du canal d'introduction (31') située à l'intérieur du carter de roue de projection (22) présentant, jusqu'à son extrémité telle, une courbure telle que l'extrémité libre, orientée dans le sens radial des palettes de projection (21), se termine directement devant l'arête radialement interne (21') de celles-ci, caractérisé en ce que
    - l'appareil à jet abrasif comporte un moteur d'entraînement (5) par lequel la roue de projection (2) est entraînable en rotation et en ce que, par le même moteur d'entraînement (5), une roue de compresseur d'un compresseur d'air (6) constituant une partie de l'appareil à jet abrasif (1) est entraînable en rotation,
    - une conduite d'air comprimé (41) va d'une sortie (64) du compresseur d'air (6) vers la conduite d'amenée d'air comprimé (40) débouchant dans la conduite d'amenée d'agent d'abrasion par jet (3),
    - la chambre de mélange d'air et d'agent d'abrasion par jet (30), dans la position de fonctionnement de l'appareil à jet abrasif (1), se trouve en dessous de l'axe de rotation (24) de la roue de projection (2) et
    - le canal d'introduction (31) entre dans le carter de roue de projection (22) en allant du bas vers le haut en oblique par rapport à l'axe de rotation (24).
  2. Appareil à jet abrasif selon la revendication 1, caractérisé en ce qu'un arbre de sortie (52) du moteur d'entraînement (5), à une première extrémité frontale du moteur d'entraînement (5), sort de celui-ci et est assemblé à la roue de projection (2) qui est située devant la première extrémité frontale du moteur d'entraînement (5) et en ce que le même arbre de sortie ou un deuxième arbre de sortie (56) du moteur d'entraînement (5), à une deuxième extrémité frontale du moteur d'entraînement (5), sort de celui-ci et est assemblé à la roue de compresseur du compresseur d'air (6) qui est situé devant la deuxième extrémité frontale du moteur d'entraînement (5).
  3. Appareil à jet abrasif selon la revendication 1, caractérisé en ce que le compresseur d'air (6) est monté sur le reste de l'appareil à jet abrasif (1) de manière décalée transversalement par rapport à l'axe de rotation du moteur d'entraînement (5) et en ce que la roue de compresseur du compresseur d'air (6) est entraînable en rotation par le moteur d'entraînement (5) par l'intermédiaire d'un multiplicateur (65).
  4. Appareil à jet abrasif selon la revendication 3, caractérisé en ce que le multiplicateur est une transmission à courroie ou une transmission à engrenage.
  5. Appareil à jet abrasif selon l'une des revendications 1 à 4, caractérisé en ce que le moteur d'entraînement (5) est un moteur électrique, de préférence à régime variable.
  6. Appareil à jet abrasif selon l'une des revendications 1 à 5, caractérisé en ce qu'est prévu, au niveau du compresseur d'air (6) et/ou sur le tracé de la conduite d'air comprimé (41), au moins un organe réglable pour influencer la pression et/ou la quantité d'air comprimé introduit dans la chambre de mélange (30).
  7. Appareil à jet abrasif selon l'une des revendications 1 à 6, caractérisé en ce que le sens longitudinal de la partie du canal d'introduction (31) allant dans le carter de roue de projection (22) forme un angle α compris entre à peu près 30° et 60° par rapport à l'axe de rotation (24) de la roue de projection (2).
  8. Appareil à jet abrasif selon la revendication 7, caractérisé en ce que l'angle α est d'à peu près 45°.
  9. Appareil à jet abrasif selon l'une des revendications 1 à 8, caractérisé en ce que, vu dans le sens de l'axe de rotation (24) de la roue de projection (2), le canal d'introduction (31) va vers le haut dans une zone angulaire de 45° par rapport au sens vertical (33) ou en oblique vers le haut.
  10. Appareil à jet abrasif selon la revendication 9, caractérisé en ce que le canal d'introduction (31) est assemblé au moyen d'un assemblage amovible par bride (32) au carter de roue de projection (22) ou à un carter externe (10) de l'appareil à jet abrasif (1) entourant le carter de roue de projection (22).
  11. Appareil à jet abrasif selon la revendication 10, caractérisé en ce que l'assemblage par bride (32) est réalisé en tant que bride pouvant subir un mouvement de rotation et pouvant être fixée dans des positions de rotation souhaitées.
  12. Appareil à jet abrasif selon l'une des revendications précédentes, caractérisé en ce qu'est prévue, pour insuffler l'air comprimé dans la chambre de mélange (30), au moins une buse (4) montée dans une paroi de la chambre de mélange (30).
  13. Appareil à jet abrasif selon la revendication 12, caractérisé en ce que la position axiale de la buse (4) dans la paroi de la chambre de mélange (30) et/ou la direction dans laquelle la buse (4) souffle l'air comprimé est réglable relativement au sens longitudinal du canal d'introduction (31) et peut être fixée dans des positions souhaitées.
  14. Appareil à jet abrasif selon l'une des revendications précédentes, caractérisé en ce qu'est prévu, dans la conduite d'amenée d'agent d'abrasion par jet (3) pour amener l'agent d'abrasion par jet à la chambre de mélange (30), au moins un organe réglable pour influencer la quantité d'agent d'abrasion par jet introduite dans la chambre de mélange (30) par unité de temps.
EP20030014905 2002-07-23 2003-07-01 Appareil de sablage Expired - Lifetime EP1384554B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002133265 DE10233265C1 (de) 2002-07-23 2002-07-23 Strahleinrichtung
DE10233265 2002-07-23

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Publication Number Publication Date
EP1384554A1 EP1384554A1 (fr) 2004-01-28
EP1384554B1 true EP1384554B1 (fr) 2006-05-31

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Publication number Priority date Publication date Assignee Title
CN103506962B (zh) * 2013-10-18 2015-05-20 山东开泰抛丸机械有限公司 一种可提高输丸质量的新型抛丸器
US11628538B2 (en) * 2019-07-02 2023-04-18 National Flooring Equipment, Inc. Valve mount for shot blaster plenum valve

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Publication number Priority date Publication date Assignee Title
DE685138C (de) * 1936-09-09 1939-12-13 Alfred Gutmann Akt Ges Fuer Ma Putzen von Werkstuecken mittels Schleudergutes
US2632980A (en) * 1949-07-08 1953-03-31 Ransohoff Inc N Method and apparatus for wet grit blasting
US6126516A (en) * 1999-05-10 2000-10-03 United States Filter Corporation Centrifugal blasting apparatus

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DE50303550D1 (de) 2006-07-06
EP1384554A1 (fr) 2004-01-28
DE10233265C1 (de) 2003-06-12

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