Claims
- 1. A process for fabricating a part made of a molding material, by means of a molding cycle having a duration of τ per part to be molded, said process comprising the steps of:a. providing tooling having a thermal diffusivity of α, a mold surface and an internal heat transfer channel through said tooling, said channel being spaced from said mold surface a distance less than twice (ατ)½; b. providing said molding material to said tooling so that it contacts said mold surface; c. providing heat transfer fluid to said heat transfer channel to facilitate exchange of thermal energy between said tooling and said fluid during said molding cycle; and d. removing from said tooling at a time interval of τ, a formed part.
- 2. The process for fabricating a part of claim 1, said providing tooling step comprising providing tooling having a heat transfer channel that is spaced from said mold surface a distance less than (ατ)½.
Parent Case Info
This application is a continuation of application 09/109,462, a continued prosecution application filed on Aug. 5, 1999, originally filed on Jul. 2, 1998, now U.S. Pat. No. 6,112,808 which is a divisional of 08/551,012, filed on Oct. 31, 1995 now U.S. Pat. No. 5,775,402,
Government Interests
This invention was made with government support under grants number DDM-8913977 and 9215728-DDM awarded by the National Science Foundation. The government has certain rights in the invention.
US Referenced Citations (55)
Foreign Referenced Citations (13)
Number |
Date |
Country |
2263777 |
Jul 1973 |
DE |
4005870 |
Aug 1991 |
DE |
0431924 |
Jun 1991 |
EP |
446934 |
Sep 1991 |
EP |
0446934 |
Sep 1991 |
EP |
0470705 |
Dec 1992 |
EP |
0578058 |
Jan 1994 |
EP |
54-9132 |
Apr 1979 |
JP |
2111528 |
Apr 1990 |
JP |
2307737 |
Dec 1990 |
JP |
4061328 |
Feb 1992 |
JP |
WO9003893 |
Apr 1990 |
WO |
WO9220505 |
Nov 1992 |
WO |
Non-Patent Literature Citations (5)
Entry |
R. Sweet, “High-Frequency Recording with Electrostatically Deflected Ink Jets”, The Review of Scientific Instruments, vol. 36 No. 2, pp. 131-136, 1965. |
C. Deckard, et al., “Solid Freeform Fabrication and Selective Powder Sintering”, NAMRC Proceedings, Symposium #15, undated. |
H. Kodama, “Automatic Method for Fabricating a Three-Dimensional Plastic Model with Photo-Hardening Polymer”, Review of Scientific Instruments, vol. 52, No. 11, Nov. 1981. |
T. Wohlers, “Creating Parts by the Layers”, Cadence, pp. 73-76, Apr. 1989. |
Database WPI, Section PQ, Week 9103, Derwent Publications Ltd., London, GB; Class P, p. 43, AN 91-020238 & SU-A-1 563 787 (Suchov, A.G.), May 15, 1990. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/109462 |
Jul 1998 |
US |
Child |
09/654172 |
|
US |