Patent US4296793A successfully refreshed from Google Patents.
US4296793A
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Refractory suspension for making foundry moulds
Assignee: Individual
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Filing: 1979-05-10
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Granted: 1981-10-27
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Expires: 1999-05-10
Abstract
Abstract A refractory suspension comprising (parts by weight): coke, 10-60; powdered metallic titanium or/and zirconium, +0.3-5.0; resol resins, 5-50; a hardener, such as an inorganic acid, 2-30; an organic solvent, 20-60. The proposed suspension allows making foundry moulds exhibiting a higher strength. The castings produced in said foundry moulds are superior in accuracy by 2 classes, according to the USSR classification, to those obtained by the prior-art methods.
Inventors
- 👤 Konstantin K. Yasinsky
- 👤 Sergei G. Glazunov
- 👤 Jury N. Ross
- 👤 Igor D. Bykov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:06
CPC Classifications
B; B22; B22C; B22C1/00; B22C3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
A refractory suspension for making lost wax foundry moulds for casting pieces of chemically-active metals, the ratio of suspension constituents consisting essentially of as follows (parts by weight): coke, 10-60; a powdered metal selected from the group consisting of titanium, zirconium and a mixture thereof, 0.3-5.0; resol resins, 5-50; a hardener selected from the group consisting of an organic and inorganic acids, 2-30; an organic solvent, 20-60.
Claim 2
Dependent Claim
67 words
A refractory suspension for making lost wax foundry moulds for casting pieces of chemically-active metals, the ratio of suspension constituents consisting essentially of as follows (parts by weight): coke, 10-60; a powdered metal selected from the group consisting of titanium, zirconium and a mixture thereof, 0.3-5.0; resol resins, 5-50; a hardener selected from the group consisting of an organic and inorganic acids, 2-30; an organic solvent, 20-60.
Claim 3
Dependent Claim
13 words
A refractory suspension of claim 1, containing phenol resin as said resol resin.
Claim 4
Dependent Claim
13 words
A refractory suspension of claim 1, containing furan resin as said resol resin.
Claim 5
Dependent Claim
12 words
A refractory suspension of claim 1, containing hydrochloric acid as said hardener.
Claim 6
Dependent Claim
12 words
A refractory suspension of claim 1, containing sulphuric acid as said hardener.
Claim 7
Dependent Claim
12 words
A refractory suspension of claim 1, containing benzene-sulphonic acid as said hardener.
Claim 8
Dependent Claim
15 words
A refractory suspension of claim 1, containing alcohols or mixtures thereof as said organic solvent.
Claim 9
Independent Claim
113 words
A method for making lost wax foundry moulds comprising the steps of: (a) forming a suspension consisting essentially, in percent by weight, of coke, 10-60; a powdered metal selected from the group consisting of titanium, zirconium, and mixtures thereof, 0.3-5.0; resol resins, 5-50; a hardener selected from the group consisting of organic and inorganic acids, 2-30; and an organic solvent, 20-60; (b) providing a wax pattern; (c) coating the pattern with the suspension at least four times, and sprinkling said pattern with powdered coke; (d) drying the coating to obtain a rigid mould; (e) melting the wax pattern from its rigid mould; and (f) curing the mould by heating to about 1300°-1350° C.
Claim 10
Independent Claim
113 words
A method for making lost wax foundry moulds comprising the steps of: (a) forming a suspension consisting essentially, in percent by weight, of coke, 10-60; a powdered metal selected from the group consisting of titanium, zirconium, and mixtures thereof, 0.3-5.0; resol resins, 5-50; a hardener selected from the group consisting of organic and inorganic acids, 2-30; and an organic solvent, 20-60; (b) providing a wax pattern; (c) coating the pattern with the suspension at least four times, and sprinkling said pattern with powdered coke; (d) drying the coating to obtain a rigid mould; (e) melting the wax pattern from its rigid mould; and (f) curing the mould by heating to about 1300°-1350° C.
Claim 11
Dependent Claim
20 words
The method of claim 8 wherein the coating of the pattern with the suspension is accomplished six to eight times.
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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |