Patent US3556196A successfully refreshed from Google Patents.
US3556196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for automatic production and transportation of flaskless sand moulds in metal casting
Assignee: Individual
•
Filing: 1968-08-19
•
Granted: 1971-01-19
•
Expires: 1988-08-19
Abstract
Abstract In a method for producing and conveying horizontally divided flaskless sand molds, the molding sand is pneumatically introduced into mold frame cavities formed above and below a laterally moving match plate having a pattern on both sides and terminated by vertically moving mold frames and vertically moving press dies cooperating with said mold frames. The molding sand is pressed by a corresponding relative movement between said press dies and match plate, after which the match plate is separated from the mold halves by a corresponding relative movement between the press dies and the mold frame on one hand, and the match plate on the other. The match plate is then moved laterally into its rest position and the mold is closed, if necessary, after the insertion of cores. The finished closed mold rests on the bottom press die which is substantially flush with the upper edge of the lower mold frame, and is then displaced laterally from the molding position by the match plate as it returns from its rest position. The ejected finished mold is added to a mold train, and the finished mold is at least supported on two sides by supporting means.
Inventors
- 👤 Eugen Buhler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:22
CPC Classifications
B; B22; B22C; B22C11/00; B22C11/10; B22C15/00; B22C15/23; B22C15/28; B22C9/00; B22C9/02; B22C9/03
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
221 words
A method producing and conveying horizontally divided flaskless sand molds comprising: a. introducing a match plate between two mold frames and dies of a mold-making machine actuatable in a substantially vertical direction; b. lowering the upper mold frame and raising the lower mold frame to abut against said match plate and thereby forming mold cavities on each side of said match plate; c. pneumatically feeding molding sand into said mold cavities; d. compressing said molding sand against said match plate by moving said dies relative said mold frames; e. raising and lowering said upper mold frame and die and said lower mold frame and die respectively to free said match plate; f. moving said match plate from said mold-making machine to a rest position which is laterally adjacent thereto; g. moving at least one die relative to its mold frame to close said mold, the closed mold resting on said bottom die which is substantially flush with the upper edge of said lower mold frame; h. returning said match plate from its rest position to said mold-making machine to laterally eject the finished closed mold and start another molding cycle; i. supporting said finished closed mold on at least two sides by supporting means, said supported finished closed mold adapted to bear against previously made molds to form a mold train.
Claim 2
Independent Claim
221 words
A method producing and conveying horizontally divided flaskless sand molds comprising: a. introducing a match plate between two mold frames and dies of a mold-making machine actuatable in a substantially vertical direction; b. lowering the upper mold frame and raising the lower mold frame to abut against said match plate and thereby forming mold cavities on each side of said match plate; c. pneumatically feeding molding sand into said mold cavities; d. compressing said molding sand against said match plate by moving said dies relative said mold frames; e. raising and lowering said upper mold frame and die and said lower mold frame and die respectively to free said match plate; f. moving said match plate from said mold-making machine to a rest position which is laterally adjacent thereto; g. moving at least one die relative to its mold frame to close said mold, the closed mold resting on said bottom die which is substantially flush with the upper edge of said lower mold frame; h. returning said match plate from its rest position to said mold-making machine to laterally eject the finished closed mold and start another molding cycle; i. supporting said finished closed mold on at least two sides by supporting means, said supported finished closed mold adapted to bear against previously made molds to form a mold train.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 1 wherein said mold train is moved on conveying means in the direction of a casting pit.
Claim 4
Dependent Claim
45 words
A method as claimed in claim 2 wherein said conveying means is a horizontal conveyor track, the sole motive force for said mold train being that of the returning match plate which ejects said finished mold and thereby moves said mold train one mold length.
Claim 5
Dependent Claim
33 words
A method as claimed in claim 3 wherein the adjacent finished molds in the mold train have their lateral sides supported by said supporting means, the adjacent sides mutually bear on each other.
Claim 6
Dependent Claim
36 words
A method as claimed in claim 2 wherein said conveying means is a driven conveyor track, and the driving power is derived from the same power source as the driving power for said match plate movement.
Claim 7
Dependent Claim
69 words
A method as claimed in claim 2 wherein said supporting means support the lateral sides of said finished molds in said mold train and adjacent supporting means bear on one another to prevent undue pressure from being exerted on the mutually adjacent mold sides in said mold train, and the power source for the movement of said match plate and the movement of said mold train are the same.
Claim 8
Dependent Claim
19 words
A method as claimed in claim 6 wherein separate power sources actuate said match plate and said mold train.
Claim 9
Dependent Claim
35 words
A method as claimed in claim 1 comprising the further step of changing the patterns on said match plate during the period said match plate is in said rest position without interrupting the molding cycle.
Claim 10
Dependent Claim
30 words
A method as claimed in claim 1 comprising the further step of heating said match plate while it is in said rest position by an external to the plate source.
Claim 11
Dependent Claim
29 words
A method as claimed in claim 1 wherein said pneumatic feeding of molding sand to said upper and lower mold cavities is carried out in a substantially vertical direction.
Claim 12
Dependent Claim
20 words
A method as claimed in claim 10 wherein said feeding to the upper and lower mold cavities is done simultaneously.
Claim 13
Dependent Claim
57 words
A method as claimed in claim 1 comprising the further steps of evacuating said match plate during the feeding of said molding sand to augment such feeding into said mold cavities, and pressurizing said match plate during the raising and lowering of said mold frames and dies to augment freeing said finished mold from said match plate.
References Cited (Backward Citations)
US2900686A
Cited
CA603754A
Cited
US1091020A
Cited
US1291996A
Cited
US1561500A
Cited
US2013278A
Cited
US2726431A
Cited
GB912608A
Cited
US3293703A
Cited
US3229336A
Cited
US3273207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |