Patent US4072181A successfully refreshed from Google Patents.
US4072181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for regulating the temperature of a casting mold
Assignee: VIHORLAT NARODNY PODNIK
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Filing: 1976-10-26
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Granted: 1978-02-07
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Expires: 1996-10-26
Abstract
Abstract A serial flow of a variable-boiling point volatile fluid is established through the wall of a casting mold and through a heater and condenser associated therewith by means of a pump. The condenser includes a lower portion in the path of flow of the volatile liquid, and an upper portion through which an auxiliary conduit extends, such conduit conveying a variable flow of coolant through the upper condenser portion. Changes in vapor pressure of the volatile liquid as the temperature in the mold changes are detected in the upper portion of the condenser by a suitable sensing device, and the output indication of the latter is employed to control a regulating valve for the auxiliary conduit to vary the flow of coolant in the auxiliary conduit. Such variations in flow, in turn, serve to adjust the vapor pressure, and thus the boiling point, of the volatile liquid and to thereby help compensate for temperature changes in the casting mold.
Inventors
- 👤 Michal Kostura
- 👤 Jan Pandula
- 👤 Absolon Harmansky
- 👤 Slavomir Smiga
- 👤 Stefan Kepic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:47
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1931; B; B22; B22D; B22D17/00; B22D17/20; B22D17/22; B22D17/2218; B29; B29C; B29C35/00; B29C35/007
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
In an arrangement for regulating the temperature of a casting mold, a casting mold having a wall, first conduit means having upstream and downstream ends and a first portion and extending through the wall of the casting mold for conveying a first volatile fluid to remove heat from the mold wall at a rate related to the then-occurring boiling point of the first fluid, condenser means including a hollow chamber having an upper portion and a lower portion in fluid communication, the upstream end of the first conduit means terminating in a first relatively low point of the lower portion of the condenser means and the downstream end of the first conduit means terminating in a second relatively high point of the lower portion, second conduit means extending into the upper portion of the condenser means for conveying a second cooling fluid through said upper portion, regulatable heater means associated with a first portion of the first conduit means between the upstream end thereof and the casting mold for selectively heating the associated first portion, and pump means serially disposed in the path of the first conduit means for maintaining a serial flow of the first fluid through the first conduit means and the lower portion of the condenser means.
Claim 2
Dependent Claim
210 words
In an arrangement for regulating the temperature of a casting mold, a casting mold having a wall, first conduit means having upstream and downstream ends and a first portion and extending through the wall of the casting mold for conveying a first volatile fluid to remove heat from the mold wall at a rate related to the then-occurring boiling point of the first fluid, condenser means including a hollow chamber having an upper portion and a lower portion in fluid communication, the upstream end of the first conduit means terminating in a first relatively low point of the lower portion of the condenser means and the downstream end of the first conduit means terminating in a second relatively high point of the lower portion, second conduit means extending into the upper portion of the condenser means for conveying a second cooling fluid through said upper portion, regulatable heater means associated with a first portion of the first conduit means between the upstream end thereof and the casting mold for selectively heating the associated first portion, and pump means serially disposed in the path of the first conduit means for maintaining a serial flow of the first fluid through the first conduit means and the lower portion of the condenser means.
Claim 3
Dependent Claim
31 words
An arrangement as defined in claim 1, in which the pump means is situated in the path of the first conduit means between the upstream end thereof and the first portion.
Claim 4
Dependent Claim
77 words
An arrangement as defined in claim 1, further comprising sensing means coupled to the wall of the casting mold for generating an indication proportional to the temperature of the mold wall, and control means coupled to the heater means and responsive to changes in the indication of the sensing means for adjusting the thermal output of the heater means to correspondingly vary the temperature of the first fluid in the first portion of the first conduit means.
Claim 5
Dependent Claim
85 words
An arrangement as defined in claim 1, further comprising detecting means in communication with the upper portion of the condenser means for providing an indication proportional to the vapor pressure in the upper portion, regulating valve means disposed in the second conduit means for varying the flow of the second fluid in the second conduit means, and control means responsive to changes in the indication from the detecting means for automatically adjusting the regulating valve means to proportionally vary the flow of the second fluid.
Claim 6
Dependent Claim
28 words
An arrangement as defined in claim 1, in which the condenser means further comprises a condensing grid extending across the interface between the upper and lower portions thereof.
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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |