Abrading – Machine – Sandblast
Patent
1993-03-31
1995-04-11
Gorski, Joseph M.
Abrading
Machine
Sandblast
451 75, 451326, B24C 328
Patent
active
054052840
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a centrifugal jet machine having a drum which is swiveable in an oscillating manner around its longitudinal axis and is provided with an upper casing opening along which centrifugal jet units are arranged in a stationary manner.
A centrifugal jet machine is known from DE-A1-2931578. The drum cross section of this centrifugal jet machine is constructed in such a way that a maximum swivel angle of 120.degree. is possible.
This swivel angle is not sufficient for a faultless rolling over of the workpieces to be treated and a jet treatment is not effected uniformly on all sides.
If the swivel angle is increased, the degree to which the drum can be filled must be reduced or the workpieces will fall out of the opening of the drum.
An attempt is made in the centrifugal machine shown in DE-A1-3210699 to increase the swivel angle by additional swiveling capacity of the centrifugal jet units. However, this requires a high construction cost with a synchronous control of the two swiveling movements. A maximum swiveling angle of 150.degree. can be achieved in this way due to the required opening distance of the upper drum opening.
The object of the present invention is to provide a centrifugal jet machine of the type indicated in the beginning which has the high swiveling range required for faultless rolling and for a good filling level.
SUMMARY OF THE INVENTION
The present invention is a centrifugal jet machine comprised of a drum defining a chamber disposed along a longitudinal axis. The drum includes an upper opening communicating with the chamber; a curved base member which is rotatably movable about the longitudinal axis, wherein the base member has circumferential ends; and a least a first set and a second set of side parts, wherein each side part has two ends and each side part of the second set is pivotally connected to one of the circumferential ends of the base member and each side part of the first set is pivotally connected to a side part of the second set. The machine also includes means for oscillating the drum; a plurality of stationary jet units arranged along the upper opening of the drum in communication with the upper opening; and guide means for guiding the first and second sets of side parts. The guide means is positioned substantially adjacent each side of the drum and at least the first set of side parts pivotally engage the guide means.
The invention is shown in the attached drawings in a number of embodiment examples and is explained in the following.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a longitudinal section of a continuous-flow centrifugal jet machine;
FIG. 2A shows a cross section of FIG. 1 schematically in the center position;
FIG. 2B shows a cross section corresponding to FIG. 2A in an outer angular position;
FIG. 3 shows a cross section of a constructional variant of a swivel drum schematically;
FIG. 4 shows a plan view in direction A of FIG. 3;
FIG. 5A shows a cross section of a batch swivel drum schematically in an outer angular position;
FIG. 5B shows a cross section corresponding to FIG. 5A in the emptying position;
FIG. 6 shows the construction of a guide rail in a constructional variant of a batch swivel drum schematically; and
FIG. 7 is an enlarged view of detail B of FIG. 7.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a continuous-flow centrifugal jet machine with a drum 2 which is arranged in a housing 1 so as to be inclined in the through-flow direction of the objects to be cleaned.
The drum 2 has an upper opening 3 in its casing. Centrifugal wheel units 4 which are fastened at the housing are arranged over this opening 3.
The drum 2 can be driven in an oscillating manner by means of a drive, not shown in more detail, so as to be swivelable between two angular positions.
In the inlet region 5 and outlet region 6, the drum has a circumferentially closed casing 7. FIG. 2A shows a cross section of the drum 2 in the region of the casing opening 3 in the center position of the swiveling area and
REFERENCES:
patent: 2254219 (1941-09-01), Hamren
patent: 3079735 (1963-03-01), Freeman
patent: 3815287 (1974-06-01), Walker
patent: 4368599 (1983-01-01), Hunziker
"Pangborn Rotoblas-Rocker Barrels", Pangborn Corp., Bulletin 213, pp. 4-26.
Brenner Peter
Dettwiler Dieter
Georg Fischer Giessereianlagen AG
Gorski Joseph M.
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