US3662812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for mixing sand/resin/catalyst and blower-forming foundry cores
Assignee: British Cast Iron Research Association
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Filing: 1969-08-26
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Granted: 1972-05-16
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Expires: 1989-08-26
Abstract
Abstract Foundry cores (and possible also molds) are formed using a fastcuring resin by putting the resin in one body of sand and the resin-curing catalyst in another body of sand, blowing these two bodies into a common chamber and then immediately transferring the resulting mixture, for example by blowing, to the coreforming or mold-forming cavity.
Inventors
- 👤 Ronald G Godding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:52
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/12; B22C15/00; B22C15/23; B22C15/24; B22C5/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
212 words
Apparatus for forming sand-based foundry core and mould bodies by a substantially cold process comprising first and second sand hoppers, first and second measuring chambers connected to said first and second hoppers respectively, first and second blowing chambers having outleTs, said first and second blowing chambers being connected respectively to said first and second measuring chambers to receive measured quantities of material therefrom, valve means between each of said hoppers and the respective said measuring chamber, further valve means between each of said measuring chambers and the respective said blowing chamber, said valve means and further valve means being operable in sequence to allow predetermined quantities of materials from said hoppers to be received from said hoppers and to pass to said blowing chambers, a common mixing chamber, structure defining passages connecting said outlets of said blowing chambers to said mixing chamber, means for admitting gas under pressure to each of said blowing chambers to force the contents thereof through said passages into said mixing chamber, means for discharging the contents of said mixing chamber, a mould box having therein a cavity placed to receive the discharged contents of said mixing chamber and means for substantially immediately transferring the discharged contents of said mixing chamber into the cavity of said mould box.
Claim 2
Dependent Claim
212 words
Apparatus for forming sand-based foundry core and mould bodies by a substantially cold process comprising first and second sand hoppers, first and second measuring chambers connected to said first and second hoppers respectively, first and second blowing chambers having outleTs, said first and second blowing chambers being connected respectively to said first and second measuring chambers to receive measured quantities of material therefrom, valve means between each of said hoppers and the respective said measuring chamber, further valve means between each of said measuring chambers and the respective said blowing chamber, said valve means and further valve means being operable in sequence to allow predetermined quantities of materials from said hoppers to be received from said hoppers and to pass to said blowing chambers, a common mixing chamber, structure defining passages connecting said outlets of said blowing chambers to said mixing chamber, means for admitting gas under pressure to each of said blowing chambers to force the contents thereof through said passages into said mixing chamber, means for discharging the contents of said mixing chamber, a mould box having therein a cavity placed to receive the discharged contents of said mixing chamber and means for substantially immediately transferring the discharged contents of said mixing chamber into the cavity of said mould box.
Claim 3
Dependent Claim
144 words
Apparatus for forming sand-based foundry core and mould bodies by a substantially cold process comprising first and second sand quantity measuring and dispensing means, first and second blowing chambers having outlets, said first and second measuring and dispensing means being disposed to discharge predetermined quantities of sand-containing material into said first and second blowing chambers respectively, a common mixing chamber, structure defining passages connecting said outlets of said blowing chambers to said mixing chamber, means for admitting gas under pressure to each of said blowing chambers to force the contents thereof through said passages into said mixing chamber, means for discharging the contents of said mixing chamber, a mould box having therein a cavity placed to receive the discharged contents of said mixing chamber, and means for substantially immediately transferring the discharged contents of said mixing chamber into the cavity of said mould box.
Claim 4
Dependent Claim
144 words
Apparatus for forming sand-based foundry core and mould bodies by a substantially cold process comprising first and second sand quantity measuring and dispensing means, first and second blowing chambers having outlets, said first and second measuring and dispensing means being disposed to discharge predetermined quantities of sand-containing material into said first and second blowing chambers respectively, a common mixing chamber, structure defining passages connecting said outlets of said blowing chambers to said mixing chamber, means for admitting gas under pressure to each of said blowing chambers to force the contents thereof through said passages into said mixing chamber, means for discharging the contents of said mixing chamber, a mould box having therein a cavity placed to receive the discharged contents of said mixing chamber, and means for substantially immediately transferring the discharged contents of said mixing chamber into the cavity of said mould box.
Claim 5
Dependent Claim
33 words
Apparatus as set forth in claim 1, including static deflecting means, said deflecting means being disposed within said mixing chamber and aligned with the paths of material entering said chamber via said passages.
Claim 6
Dependent Claim
35 words
Apparatus as set forth in claim 3, wherein said deflecting means comprise two sets of rods, the rods of each set being disposed in one of said respective paths and extending transverse to the path.
Claim 7
Dependent Claim
33 words
Apparatus as set forth in claim 4 wherein said paths are oppositely directed and wherein the rods of one of said sets are staggered with respect to the rods of the other set.
Claim 8
Dependent Claim
32 words
Apparatus as set forth in claim 1, including a corrugated surface within said mixing chamber, said surface being disposed to be impinged upon by the contents of said chamber on discharge thereof.
Claim 9
Dependent Claim
44 words
Apparatus as set forth in claim 1, wherein said transfer means comprises a common blowing chamber disposed to receive the contents of said mixing chamber and means for admitting gas under pressure to said blow chamber to discharge the contents thereof into said cavity.
Claim 10
Dependent Claim
37 words
Apparatus as set forth in claim 1 wherein each of said first and second measuring chambers comprises to two relatively movable parts, said parts being movable such as to vary the volume of the chamber formed thereby.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |