US3845806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-voltage discharge arrangement for stripping foundry moulds off castings
Assignee: Individual
•
Filing: 1973-05-16
•
Granted: 1974-11-05
•
Expires: 1993-05-16
Abstract
Abstract An arrangement for stripping foundry moulds off castings by using high-voltage electrical discharges in fluid comprising a container for castings to be treated which container is inclined to a horizontal plane, fitted at the outlet with a slide gate linked mechanically with a means for charging and discharging the castings to enable time correlation of the charging and discharging operations. The container is so designed that it ensures the orientation of the castings in relation to the electrodes to create the requisite conditions for high-voltage electrical discharges and is able to come into engagement with the castings to be treated and to turn them with respect to the longitudinal axis of the container to ensure exposure of the entire surface of the casting being treated successively to the effect of the high-voltage electrical discharges.
Inventors
- 👤 V Schekin
- 👤 V Stepanov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:36
CPC Classifications
B; B22; B22D; B22D29/00; B22D29/001; B22D29/007; B22D29/008
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
226 words
An arrangement for stripping foundry moulds off castings by using high-voltage electrical discharges in fluid comprising: a fluid bath tank; a container for castings to be separated from foundry moulds, said container being mounted in said bath tank with its bearing surface being inclined to a horizontal plane; a plurality of electrodes secured above said container and adapted to ensure a high-voltage electrical discharge in fluid; a gear for traversing said electrodes in relation to said container; a means for charging the castings into said container and discharging them from it; a slide gate set up at the outlet of said container, secured on it to be able to turn and linked meChanically with said charging and discharging means to enable time correlation of the charging and discharging operations; said container is made up of a casing ensuring the orientation of the castings being treated in relation to said electrodes to create the requisite conditions for high-voltage electrical discharges, and of a tilter which can be brought into engagement with the castings being treated and turn them with respect to the longitudinal axis of the container to ensure exposure of the entire surface of the casting being treated successively to the effect of the high-voltage electrical discharges; a transporting means for the removal of the treated castings together with the separated foundry moulds from the arrangement.
Claim 2
Dependent Claim
226 words
An arrangement for stripping foundry moulds off castings by using high-voltage electrical discharges in fluid comprising: a fluid bath tank; a container for castings to be separated from foundry moulds, said container being mounted in said bath tank with its bearing surface being inclined to a horizontal plane; a plurality of electrodes secured above said container and adapted to ensure a high-voltage electrical discharge in fluid; a gear for traversing said electrodes in relation to said container; a means for charging the castings into said container and discharging them from it; a slide gate set up at the outlet of said container, secured on it to be able to turn and linked meChanically with said charging and discharging means to enable time correlation of the charging and discharging operations; said container is made up of a casing ensuring the orientation of the castings being treated in relation to said electrodes to create the requisite conditions for high-voltage electrical discharges, and of a tilter which can be brought into engagement with the castings being treated and turn them with respect to the longitudinal axis of the container to ensure exposure of the entire surface of the casting being treated successively to the effect of the high-voltage electrical discharges; a transporting means for the removal of the treated castings together with the separated foundry moulds from the arrangement.
Claim 3
Dependent Claim
161 words
An arrangement of claim 1 wherein said means for charging and discharging the castings comprises an inclined chute shut off in its upper portion with a spring-biased damper put on a shaft, on which are secured a cam with a projection adapted to control an air cylinder located on the side surface of said chute and intended for raising said slide gate of said container, and a rest with a pawl which is brought into engagement with said projection of said cam when said damper is turned through a certain angle Alpha under the effect of the weight of the casting being charged to preclude further turning of said damper until the treated casting emerges from said container, and to release said damper and admit the casting into said container when said slide gate is lowered, a rod of a piston of said air cylinder carries a washer fastened to it and bringing said rest out of engagement with said cam.
Claim 4
Dependent Claim
100 words
An arrangement of claim 2 wherein the air cylinder adapted for raising the slide gate under the effect of the cam of the charging and discharging means is controlled by a three-line two-position normally closed distributor with a limit switch which is actuated by the cam of the charging means, and by a three-line two-position normally open distributor with a pneumatic control connected in succession through a time relay by an input signal allowing the piston of the air cylinder to be shifted from its initial position when the slide gate is raised and the return of the two members.
Claim 5
Dependent Claim
62 words
An arrangement of claim 1, wherein to enable a mechanical linkage between the slide gate and the charging and discharging means provision is made for a wire rope encompassing rollers located on a chamber and chute, with one end of the rope being secured to the slide gate and the other on the rod of the air cylinder of the charging means.
Claim 6
Dependent Claim
33 words
An arrangement of claim 1, wherein a casing ensuring the orientation of the castings in relation to the electrodes is fitted with a convex bottom with a radius R passing into inclined walls.
Claim 7
Dependent Claim
25 words
An arrangement of claim 1, wherein said tilter has a pusher acting on the casting placed in the container, and fitted with a pneumatic drive.
Claim 8
Dependent Claim
50 words
An arrangement of claim 6, wherein said tilter comprises a shell with ribs located on the internal surface of the container along its longitudinal axis and adapted to come into engagement with the castings, and a ratchet wheel secured on its external surface and coming into engagement with the pusher.
Claim 9
Dependent Claim
95 words
An arrangement of claim 1, wherein the gear for traversing the electrodes in relation to the container comprises a two-way air cylinder with a piston whose rod carries the electrodes secured on it and whose spaces are in communication with the atmosphere through the normally closed two-line two-position distributors with a pneumatic control actuated by a four-line three-position switch and are constantly connected to a compressed air main through additional channels with non-return valves to provide a requisite clearance between the electrode and the casting ensuring a high-voltage electrical discharge capable of destroying foundry moulds.
References Cited (Backward Citations)
DE1075401B
Cited
SU126585A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |