DE8600876U1 - Blasting material processing device for small compressors from about 100 1/m suction capacity - Google Patents

Description

6 β β β β β β β 4 ö e β β Cl Hans Günter Badtir TannenWeg 4 Applicant&iacgr; 5305 Witterschlick Sandblasting device j preferably Designation:

for small compressors from about 100 l/min suction capacity

The present invention relates to a jet device which has a compressed air handle and a connection for a compressed air compressor,

furthermore with a sand guide pipe and a compressed air pipe guided in this, whereby the sand guide pipe at the end changes into a jet nozzle, into the interior of which the end of the compressed air pipe opens, as well as furthermore with a sand container opening into the beginning of the sand guide pipe.

In such known sandblasting devices, the sand or granulate container is arranged below the sand guide tube on the side of the compressed air handle.

The sand container, which has a capacity of approximately 1 liter, has an open riser pipe running out in the lower part of the container, which flows into the sand guide pipe at a right angle in a bottleneck that is unfavorable in terms of flow.

The purpose of the present innovation is to improve a sandblasting device in such a way that the installation of a riser pipe ending at a right angle in the bottleneck in the sand guide pipe can be dispensed with, whereby the sand or the granulate is also not drawn in by the suction power of the compressed air, and by the resulting

The sand is not drawn from the sand container by the negative pressure created in the sand guide pipe, but rather by gravity, saving on compressed air, whereby the sand or granulate from the sand container arranged above the sand blasting device or sand blasting gun gradually trickles directly and automatically into the sand guide pipe due to gravity.

To solve this problem, a sandblasting device of the type mentioned at the beginning is provided with the sandblasting gun or its compressed air handle below the sand guide tube, and above it the sand container opening into the sand guide tube with its filling opening and a funnel-shaped outlet, whereby the area of the sand guide tube at the mouth of the outlet is designed in the form of a chamber or a stationary container with an increased size.

Advantageous embodiments of the sandblasting device according to the invention are derived from claims 1-12, whereby in particular when dimensioning all sand or granulate-carrying hollow bodies of the sandblasting device, with the exception of the jet nozzle, with a cross-section or a clear width of

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at least 180 mm" this sandblasting device can be designed for small compressors with a suction capacity of 100 l/min or more.

By saving a considerable amount of compressed air, the new sandblasting device enables a technically simple and efficient sandblasting process with small compressors, while saving a considerable amount of energy.

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The innovation is explained in more detail using a schematic representation of the previous method according to sketch A of the drawings and using a preferred embodiment according to sketch B of the drawings.

Schematic representation of the previous procedure according to sketch A:

When compressed air is released from the nozzle (1) , a vacuum is created in the pipe (2) which sucks the sand from the container (3) through the riser pipe (A). The sand is then blown against the workpiece through the sandblasting nozzle, which surrounds the compressed air nozzle (1) (liquid atomizer). This principle only produces useful performance for sandblasting guns with compressors whose suction capacity is at least approx. 400 l/min.

Preferred embodiment of sandblasting pre-treatment according to sketch B:

1. The container for sand or granulate (6) with a capacity of approx. 1 liter is moved from below the blow gun towards the top, which saves energy in the form of the amount of compressed air that has to be provided, because the sand trickles into the gun by gravity; the riser pipe (4) from sketch A is omitted.

2. The aerodynamically unfavourable right angle in the bottleneck at point (5) of sketch A is replaced by a larger chamber at point (7) in sketch B, from which the sand is discharged by gravity and by work-related vibrations with

the sandblasting gun into the pipe (8). This means that only a small suction effect is required and further energy savings are achieved on the compressor side.

3. The minimum cross-section of all sand-bearing construction

2 parts is extended to 180 mm, which corresponds

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.a clear diameter of approx. 15 mm.

4. The sand-carrying pipe (8) and the compressed air pipe (9) can be exchanged for longer pipes for working in hard-to-reach places.

5. The sand container (6) has a funnel-shaped outlet which is arranged on the side so that the normal sandblasting pipe (8) can be made as short as possible. In the filling opening > there is a removable sieve (12) so that already used sand or granulate can be quickly reprocessed and used again. |

6. The storage container (6) can optionally be replaced with a hose connection, |* which leads to a larger sand or granulate container h , which can be arranged above the work area; this elevated container also has a funnel-shaped outlet. This

enables longer working without refill breaks. !

The criteria set out in points 1 to 3 result in compressed air savings of approximately 1/4 of the amount of compressed air required with previous methods. The compressed air nozzle (10) and the compressor can be correspondingly smaller, which enables economical sandblasting, especially for these smaller workshop compressors.

Manufacturing details:

7. The compressed air pipe (9) is screwed into the gun body with a thread and is firmly connected with a wing screw for quick replacement without tools.

8. The part (11) (material: metal injection molding or hard plastic) is attached to the pistol handle with a metal clamping ring for quick replacement of the compressed air hose (9).

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The same clamping ring is located on the sand filling nozzle for attaching the storage container or hose connection to the stationary larger container.

Summary:

1. Relocate the sand feed by 180 to the top of the blasting gun.

2. Formation of a spacious chamber through part (11), through which the sand reaches Jas jet pipe by its own weight.

3. Design of all sand-bearing hollow bodies on

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at least 180 mm cross-section or clear width.

4. Sand guide pipe (8) and compressed air pipe (9) are interchangeable and available in different lengths to ensure optimum efficiency.

5. The sand container (6) is equipped with a sieve so that used sand can be reused immediately.

6. Possibility of replacing the container (6) with a hose connection to a larger separate container.

7. Compressed air pipe (9) with nozzle (10) that can be replaced without tools.

8« Clamping rings enable quick disassembly for pipe replacement.

By saving a lot of compressed air, efficient sandblasting with small compressors is possible.

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Claims (12)

AZr G 86 OO 876.5 Applicant ■ Hans Günter Badur Tannenweg 4, 5305 Witterschlick Protection claims 1. Sandblasting device with a sandblasting gun with a compressed air handle and a connection for a compressed air compressor, furthermore with a sand guide tube and a compressed air tube guided in it, whereby the sand guide tube merges at the end into a blasting nozzle, inside of which the end of the compressed air tube opens, and further comprising a sand container opening into the beginning of the sand guide pipe, characterized in that the suction jet device has the sand blasting gun (13) or its press-release handle below the sand guide pipe (8), and above it the sand container (6) opening into the sand guide pipe (8) with a filling opening (14) and funnel-shaped outlet (15), wherein the area of the sand guide pipe (8) at the mouth point (5) of the filling outlet (15) is designed in the form of a chamber or a stationary container (11) with an increase in its dimensions. 2. Sandblasting device according to claim 1, characterized in that the funnel-shaped outlet (15) of the sand container (6) is arranged laterally outside the sand guide pipe (8). 3. Sandblasting device according to claim 1 or 2, characterized in that -"2— &Ggr; 9 * tr* » · · a sieve (12) is arranged in the filling opening (14) of the sand container (6). 4. Sandblasting device according to one of the preceding claims 1 to 3, characterized in that the sand container (6) with its funnel-shaped outlet (15) is designed in the form of a raised container arranged above the sandblasting gun with a hose connection. 5. Sandblasting device according to one or more of the preceding claims 1 to 4, characterized in that the compressed air pipe (9) and the sand guide pipe (8) are detachably secured in the sandblasting device (19). 6·. Sandblasting device according to claim 5, characterized in that the compressed air pipe (9) has a threaded part (20) on the section facing the gun body (16) which can be screwed into a threaded bore (18) of the gun body (16). 7. Sandblasting device according to claim 6, characterized in that the compressed air pipe (9) has a wing screw firmly connected to it on the outside. 8. Sandblasting device according to one or more of the preceding claims, characterized in that the area of the sand guide pipe designed in the form of an enlarged chamber or the stationary container there (11) is designed as a metal injection molding or hard plastic part. -3- 6 S ♦ · 9. Sandblasting device according to claim 8, characterized in that the metal injection molded or hard plastic part (11) and the gun body (16) releasably secured by a metal clamping ring (17) | are. 10« Sandblasting device according to one of the preceding claims 1 to 9, characterized in that the sand guide pipe (8) and the compressed air pipe (9) are manufactured in different lengths. 11. Sandblasting device according to one or more of the preceding claims 1—lOJ characterized in that the filler neck of the metal injection molding or hard plastic part (H)' or the sand guide pipe (8) is connected to the sand container (6) or its hose connection by means of a second clamping ring (18). 12. Sandblasting device according to one or more of the preceding claims 1-11, characterized in that the "sand-conducting hollow bodies" of the sandblasting device (sand guide pipe, metal injection molding or hard plastic part of the sand guide pipe, filler neck of the sand guide pipe, funnel-shaped outlet and hose connection of the sand container) have a clear width or an inner cross- have a cross-sectional area dimension of at least 180 mm.