US3872912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand slinger
Assignee: Individual
•
Filing: 1973-08-10
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Granted: 1975-03-25
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Expires: 1993-08-10
Abstract
Abstract At the discharge opening of a sand slinger head, translatable in a circular path during sand slinger machine operations, a swingable flap plate is mounted to the head housing by a pivot parallel to the slinger wheel axis as an extension of a fixed casing wall portion about the path of the slinger wheel blade. The flap plate is grossly oscillated or swung with a primary oscillatory motion by a fluid-powered double-acting piston cylinder unit, at 50 to 250 c.p.m. with adjustability from operator''s station of the stroke midpoint, of the frequency, and of amplitude or angular stroke length of from 1* to 20*, and further is vibrated with a smaller superimposed secondary motion through an angle of 1* to 3* at a much higher frequency of about 1000 c.p.m. by an attached vibrator. Also a high speed rotating eccentric drive for the gross or primary swing is described. A process of slinger application of a refractory composition in plastic state to pouring ladles is described, wherein the discharge stream of composition slugs or balls, on each turn of the slinger machine, traces a sinusoidal path of application in the annular space between a vessel wall to be lined and a temporary forming ring, with a phase displacement of the sinusoidal loops on successive turns, thereby to improve evenness of application and uniformity of compaction of the lining composition.
Inventors
- 👤 Felix Axmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:44
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/20; B22D; B22D41/00; B22D41/02; B22D41/023
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
158 words
A method of filling a material in an at least semi-plastic or moldable condition into a tubular space defined between an outer, female, wall surface and an inner, male, surface with periphery spaced from the female surface, and having a closed bottom, comprising: dividing the material into continually produced similar slugs; projecting said slugs as produced in a constant flow stream into the tubular space towards its bottom, while continually advancing said stream in repeated circuits around the closed circumference of said tubular space and while maintaining a rough parallelism of the average centerline of the stream relative to a fixed central axis; rapidly deflecting said stream in an oscillatory manner, transverse to the direction in which the stream is advancing, to shift the place of stream impact continually to and fro between the inner and outer surface 5; the aforedescribed procedure being carried on through sufficient repeated circuits of the stream until the said space is filled.
Claim 2
Independent Claim
158 words
A method of filling a material in an at least semi-plastic or moldable condition into a tubular space defined between an outer, female, wall surface and an inner, male, surface with periphery spaced from the female surface, and having a closed bottom, comprising: dividing the material into continually produced similar slugs; projecting said slugs as produced in a constant flow stream into the tubular space towards its bottom, while continually advancing said stream in repeated circuits around the closed circumference of said tubular space and while maintaining a rough parallelism of the average centerline of the stream relative to a fixed central axis; rapidly deflecting said stream in an oscillatory manner, transverse to the direction in which the stream is advancing, to shift the place of stream impact continually to and fro between the inner and outer surface 5; the aforedescribed procedure being carried on through sufficient repeated circuits of the stream until the said space is filled.
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein said stream is angularly deflected.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein the total amplitude of a resultant deflection of the point of stream impact is on the order of the distance of stream advance for each deflection cycle.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the stream is angularly deflected through a selected angle of from 1* to 20*.
Claim 6
Dependent Claim
130 words
The method of claim 1 as a process for compacting application of a lining composition in plastic state particularly in Preparation of the lining of a ladle or like vessel for molten metal where said female surface is the vessel surface to be relined, and said male surface provided by an inserted form unit, and further carried out with a sand slinger having a swingable flap plate pivoted in the slinger wheel housing to swong about an axis parallel to the wheel axis in order to change the slinger head direction of discharge of a said stream comprised of slugs of said composition produced and projected by the slinger wheel, with angular oscillation of said plate at a frequency of at least 50 strokes per minute to deflect said stream.
Claim 7
Dependent Claim
20 words
A process as described in claim 5 with said frequency within the range of from 150 to 300 per minute.
Claim 8
Dependent Claim
21 words
A process as described in claim 5 wherein said plate is swung through a selected angle lying between 1* to 20*.
Claim 9
Dependent Claim
50 words
A process as described in claim 5 wherein said plate is swung through a selected angle lying between 1* to 20* and superimposed on said swinging motion has a vibrating motion through an angular amplitude of from 1* to 3* with a frequency of at least 1000 cycles per minute.
Claim 10
Dependent Claim
36 words
A process as described in claim 5 wherein the application of the lining is carried out in stages with a succession of inserted form units added one to another as the filling of each is completed.
Claim 11
Dependent Claim
189 words
A sand slinger machine having: a slinger head, and means shiftably supporting and driving the slinger head as a whole relative to a region to be filled with slung material to cause a head discharge stream of slung material to traverse a said region with a major motion for distribution of the material over the entire region; said slinger head having a bladed slinger wheel, a housing mounting the wheel for high speed rotation and providing also a circumferential casing about the wheel, a charging funnel inlet opening through the casing, and a discharge outlet from the casing, a flap plate at the discharge outlet swingable about a pivot shaft inwardly beyond a line tangential to the inner circumferential surface of the casing at the upstream side of said discharge outlet thereby to vary the head wheel discharge direction, and power driven means mounted on the housing and connected with said flap plate to swing the plate about said pivot shaft at a frequency of swing of at least 50 cycles per minute whereby the wheel discharge direction is varied in an oscillatory manner relative to said major motion.
Claim 12
Dependent Claim
189 words
A sand slinger machine having: a slinger head, and means shiftably supporting and driving the slinger head as a whole relative to a region to be filled with slung material to cause a head discharge stream of slung material to traverse a said region with a major motion for distribution of the material over the entire region; said slinger head having a bladed slinger wheel, a housing mounting the wheel for high speed rotation and providing also a circumferential casing about the wheel, a charging funnel inlet opening through the casing, and a discharge outlet from the casing, a flap plate at the discharge outlet swingable about a pivot shaft inwardly beyond a line tangential to the inner circumferential surface of the casing at the upstream side of said discharge outlet thereby to vary the head wheel discharge direction, and power driven means mounted on the housing and connected with said flap plate to swing the plate about said pivot shaft at a frequency of swing of at least 50 cycles per minute whereby the wheel discharge direction is varied in an oscillatory manner relative to said major motion.
Claim 13
Dependent Claim
19 words
The sand slinger machine as described in claim 10 wherein said power driven means comprises a rotating eccentric drive.
Claim 14
Dependent Claim
30 words
The sand slinger machine as described in claim 10 wherein said power driven means comprises: a pressurized fluid powered piston-cylinder assembly including a double-acting piston linked to said flap plate.
Claim 15
Dependent Claim
157 words
The sand slinger machine as described in claim 10 wherein said power driven means includes a pressurized fluid actuated piston-cylinder assembly comprising: a first cylinder having a double-acting piston with a double-ended piston rod having the rod ends projecting from respective cylinder ends, one rod end being connected with said flap plate to swing the same, parallel stop projections extending radially from the respective projecting portions of said piston rod, a second cylinder adjacent and parallel to the first cylinder, but divided into two separate aligned piston chambers each having a respective double acting piston with a respective single-ended piston rod extending through the corresponding end of the second cylinder. the orientation and length of said stop projections being such as to encounter the ends of the respective said single-ended piston rods as cooperative stop means limiting the travel of the first piston in respective directions and thereby the swing of said flap plate in both directions.
Claim 16
Dependent Claim
67 words
The sand slinger machine as deScribed in claim 13 including means for alternately applying fluid pressure to opposite ends of the first piston-cylinder unit at a rate corresponding to a desired frequency of plate swing, and means for applying fluid pressure to said chambers to set and hold the single ended rods at desired extents of projection for determining the extent and region of plate swing excursion.
Claim 17
Dependent Claim
35 words
The sand slinger machine as described in claim 10 wherein the pivot shaft of said flap plate is journalled in resilient bushings as elastic support allowing vibration in the plate additional to its pivotal swing.
Claim 18
Dependent Claim
32 words
The sand slinger machine as described in claim 10 wherein a plate vibrating unit is mounted on said flap plate to oscillate the plate with a frequency superimposed on its swing frequency.
Claim 19
Dependent Claim
37 words
The sand slinger machine as described in claim 10 wherein said housing includes a charging inlet funnel having a down stream wall side of the funnel comprised of a wear plate in combination with a heating plate.
Claim 20
Dependent Claim
52 words
The sand slinger machine as described in claim 10 wherein the portion of the said casing, extending over the path reach in which charged slung material is engaged by the slinger wheel blade, is comprised of a plurality of replaceable wear plates successively joined to one another by tongue and groove formations.
Claim 21
Dependent Claim
76 words
The sand slinger machine as described in claim 18 wherein as considered relative to wheel rotation direction, the last and first plates of said plurality are provided with respective outwardly extending integral lugs. the lug of the last plate engaged by a fixed projection of said housing, and the lug of the first plate is engaged by a lug of a securing screw extending through the housing and externally tightened and secured relative to the housing.
Claim 22
Dependent Claim
36 words
The sand slinger machine as described in claim 10 wherein there is provided an air venting opening in said housing in the region immediately before the charging inlet as seen in the direction of wheel rotation.
Claim 23
Dependent Claim
43 words
The sand slinger machine as described in claim 10 wherein in the region immediately before the location of the flap plate as seen in the direction of wheel rotation, there is provided the discharge opening of a moisture supply passage into the housing.
Claim 24
Dependent Claim
60 words
The sand slinger machine as described in claim 10, wherein said means supporting and driving the slinger head shiftably as a whole comprises means supporting and driving the head to orbit about an axis and thereby to cause a head discharge stream in a said major motion to travel along a closed circuit region to be filled with slung material.
Claim 25
Dependent Claim
24 words
The sand slinger machine as described in claim 10, wherein said flap plate on its inner side is provided with a changeable wear plate.
Claim 26
Dependent Claim
25 words
The sand slinger machine as described in claim 10, wherein the axis of the flap plate pivot shaft extends substantially parallel to the wheel axis.
Claim 27
Dependent Claim
106 words
The sand slinger machine as described in claim 10, wherein said means supporting and driving the slinger head shiftably as a whole comprises means supporting and driving the head to orbit about an axis and thereby to cause a head discharge stream in a said major motion to travel along a closed circuit region to be filled with slung material; and said slinger head disposed with said flap plate oriented to be swinging in a direction generally transverse to the path of the head as it orbits about said axis, and thereby the wheel discharge direction being oscillatorily continuously varied generally transversely to said major motion.
References Cited (Backward Citations)
US3080043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |