US3998263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System to make metal casting molds
Assignee: Von Roll AG
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Filing: 1974-12-06
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Granted: 1976-12-21
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Expires: 1994-12-06
Abstract
Abstract To permit efficient utilization of expensive equipment in casting mold manufacturing systems, particularly of a molding press, pattern plates are cycled in one loop of a plurality of work stations, including the station in which molding sand is applied to the mold boxes or flasks, and the single press, and a second loop also including the single press and, preferably, also the sand application station is provided in which loose patterns are placed in flasks, so that the common work stations, and principally the molding press, is efficiently utilized.
Inventors
- 👤 Fritz Iten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:20
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/04; B22C11/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
289 words
A system to make casting molds, selectively, from repetitively used patterns assembled on pattern plates (3), and from loose patterns (10), having operating stations (F, M, M', S, P, L, T, T') including a loading station (F. M. M') in which first mold boxes (5) are loaded with pattern plates (3); means (T, 9) to return the pattern plates (3) after preparation of the mold, for re-use; loading means (L) in which second mold boxes (5) are loaded with loose patterns (10); a press station (P) to compress molding sand in the boxes, and a conveyor transport system (17) to circulate the pattern plates, the loose patterns and the mold boxes; said conveyor transport system comprising a first conveyor portion solely handling pattern plates (3) and including said loading station (F, M, M') in which first mold boxes are loaded with pattern plates and said means (T, 9) to return the pattern plates, after preparation of the mold, for re-use; a second conveyor portion solely handling loose patterns (10) and including said loading means (L) in which second mold boxes are loaded with loose patterns, and a third common conveyor portion forming, together with said first conveyor portion (1) a first closed loop and, together with said second conveyor portion (2) a second closed loop, said third common conveyor portion including said press station (P) which forms a single press station common to both of said loops, the conveyor transport system selectively feeding to said single press station (P), said first and second boxes loaded, selectively, with said pattern plates (3) and said single patterns (10), said conveyor transport system then feeding said boxes to the respective first and second conveyor portions of said first and second closed loops.
Claim 2
Independent Claim
289 words
A system to make casting molds, selectively, from repetitively used patterns assembled on pattern plates (3), and from loose patterns (10), having operating stations (F, M, M', S, P, L, T, T') including a loading station (F. M. M') in which first mold boxes (5) are loaded with pattern plates (3); means (T, 9) to return the pattern plates (3) after preparation of the mold, for re-use; loading means (L) in which second mold boxes (5) are loaded with loose patterns (10); a press station (P) to compress molding sand in the boxes, and a conveyor transport system (17) to circulate the pattern plates, the loose patterns and the mold boxes; said conveyor transport system comprising a first conveyor portion solely handling pattern plates (3) and including said loading station (F, M, M') in which first mold boxes are loaded with pattern plates and said means (T, 9) to return the pattern plates, after preparation of the mold, for re-use; a second conveyor portion solely handling loose patterns (10) and including said loading means (L) in which second mold boxes are loaded with loose patterns, and a third common conveyor portion forming, together with said first conveyor portion (1) a first closed loop and, together with said second conveyor portion (2) a second closed loop, said third common conveyor portion including said press station (P) which forms a single press station common to both of said loops, the conveyor transport system selectively feeding to said single press station (P), said first and second boxes loaded, selectively, with said pattern plates (3) and said single patterns (10), said conveyor transport system then feeding said boxes to the respective first and second conveyor portions of said first and second closed loops.
Claim 3
Dependent Claim
78 words
System according to claim 1, wherein the second closed loop of the second conveyor portion (2) includes the loading means for said second mold boxes and comprises means supplying a base or substrate (11) on which the loose patterns (10) are disposed, means supplying the second mold boxes (5) and a turning station (T') to invert the second mold boxes to prepare the turned mold boxes for association with a further mold box at said loading means (L).
Claim 4
Dependent Claim
34 words
System according to claim 1, further comprising means (P') coupled to the press (P) to selectively set the compaction pressure thereof aS required by the respective mold box being transported to the compaction press.
Claim 5
Dependent Claim
43 words
System according to claim 2, further comprising means )P') coupled to the press (P) to selectively set the compaction pressure thereof depending on whether the bottom part, or the bottom and top parts of the mold are applied to said press for compaction.
Claim 6
Dependent Claim
40 words
System according to claim 1, wherein the third common conveyor portion includes a sand filling station (S), and a mold-separating station (T, T'), said sand filling (S) and separating (T,T') stations of said loops, being common to both said loops.
Claim 7
Dependent Claim
68 words
System according to claim 5, wherein the first conveyor portion (1) for the pattern plates (3) is located at least in part within the geometric arrangement of the second conveyor portion (2) for the loose patterns, and said third common conveyor portion of the loops further includes a common station (F) for placing of mold boxes on the carrier plates (3) or on the loose patterns (10), respectively.
Claim 8
Dependent Claim
68 words
System according to claim 1, wherein the third common conveyor portion of the loops includes a sand filling station (S); and wherein the sand filling station (S) as well as the press station (P) of the common conveyor portion of both said loops is located at a higher level (E1) than the level (E2) of at least part of the first conveyor portion (1) of the first loop.
Claim 9
Dependent Claim
68 words
System according to claim 7, wherein the first loop (1) is located on three levels (E1, E2, E3), the third level (E3) being below the second level (E2) and having a pattern plate interchange station (M') located thereat, the first closed loop having means to lower pattern carriers (3) to said interchange station (M') at the third level (E3) to exchange pattern plates with plates of different patterns.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |