Abrading – Machine – Sandblast
Patent
1994-10-31
1996-07-16
Kisliuk, Bruce M.
Abrading
Machine
Sandblast
451 75, B24C 504
Patent
active
055362001
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a nozzle of a sand blaster for dust-free blasting of plain surfaces comprising a tubular housing connectable to a blast hose and provided with a revolving nozzle head diffuserlike enlarged and covered with an end plate which is provided with inclined orifices, so that the nozzle head is revolved by the throw of the sand blasting material.
For dust-free sand blasting of plain surfaces, sand blasters are known which are provided with a hood mounted on the nozzle head for covering the blasted area and comprising installations for sucking off the blasting material and the dust. The nozzle head is provided with a venturi nozzle which directs the sand blasting material abrasive in a conical shape against the surface to be blasted. The nozzle head is moved over the surface strip by strip. For a revolving drive of the nozzle head, but avoiding an additional motor, a blast nozzle is known from DE 38 34 896 C2. The end plate of it is provided with inclined orifices so that the diffuserlike enlarged nozzle head is revolved by the throw of the abrasive-air mixture. For adjustment to more or less wide blasting strips and/or blasting effects on the surface to be blasted, the disadvantage is that several end plates of different design provided with appropriate orifices must be available and stored.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to develop a blast nozzle in such a way that higher adaptability to the cleaning operations is possible.
This problem is solved in accordance with the invention by providing each orifice with a slewable blast pipe.
In accordance with the invention, the blast pipes allocated to the end plate are adjustable into the most effective position for cleaning operations. By a radial adjustment the width of blasted strip can be enlarged or reduced and by a tangential adjustment the inclination of the blasting may be changed. Depending on the nature of the material to be blasted and the pollution, the best adaptability can be achieved by adjusting the blast pipes. Where, for example, a hard coat of dirt is to be blasted, an appropriate hard blasting of the surface is adjustable.
The bearing of the blast pipes on the end plate may be made in different ways. Preferably, the blast pipe is carried slewable by a socket joint at the end plate. At this, a pipe socket provided with a ball cup for the socket joint may be attached at the edge of each orifice. Besides that, the socket joint preferably is provided with fastening devices which fix the blast pipe in the adjusted slewing position.
BRIEF DESCRIPTION OF THE DRAWINGS
The drawings illustrate an example of the invention.
FIG. 1 is a side view of a blast nozzle for dust-free blasting of planar surfaces,
FIG. 2 is a front end view of the subject of FIG. 1, and
FIG. 3 is a central cross-sectional view of the subject of FIG. 1 wherein, for a better representation, the section of the blast pipe is shown in a displaced position.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The blast nozzle for sand blasters for a dust-free blasting of planar surfaces as shown in FIG. 1 substantially consists of a tubular housing 1 with an equipment for connecting a blast hose 2. At the front a nozzle head 3 is provided which is enlarged diffuserlike. The nozzle head 3 is provided with an exchangeable end plate 4 which is fastened by appropriate fixing devices, such as screws and the like. Furthermore, but not shown in the drawing, the blast nozzle is provided with a hood that is supplied with suction installations.
As shown in FIG. 3, the conical nozzle head is provided with a collar 5, which is mounted revolvingly on the housing 1 by means of a rolling bearing 6. The blasting material, consisting of the carrier gas with the abrasive sand or other particles, is blown through the blast hose 2 into the nozzle head 3. The end plate 4 mounted in the frontal opening of the nozzle head 3 is supplied with four inclined drill-hole-like orifices 7, which are arranged transversely through the head
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patent: 2557106 (1951-06-01), Hughes
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patent: 4704826 (1987-11-01), Kirkland
patent: 4819388 (1989-04-01), Kirkland
patent: 5248094 (1993-09-01), Munoz
patent: 5255853 (1993-10-01), Munoz
Banks Derris
Kisliuk Bruce M.
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