Investment casting

Details Investment casting Investment casting

1996-10-22

1999-05-25

Pyon, Harold Y.

Metal founding

Process

Shaping a forming surface

164 34, 164 41, B22C 702

Patent

active

059062347

ABSTRACT:
Methods are provided for producing investment cast articles, such as orthopedic implants or portions thereof, having at least a partially textured surface that is formed during casting of the article. In an exemplary method, a textured metal casting is produced by creating a heat destructible pattern and spraying the pattern with a texturing material to cause the texturing material to form a textured surface on at least a portion of the pattern. In another embodiment, a textured template is pressed against a heat softenable pattern to provide a textured pattern. With respect to each of these methods, a shell is the created around the textured pattern form a mold, and the pattern is removed from the shell. Molten metal is introduced into the mold and allowed to harden, after which the mold is removed. In yet another embodiment a textured pattern for investment casting is provided by creating a textured model and enveloping it with a resilient material to create a resilient mold. The textured model is removed from the resilient mold and the mold is filled with investment casting wax to create a textured pattern.

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Anderson D.L. : "Role of Rapid Prototyping in Prooperative Planning and Patient-Specific Implant Generation," Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference, Dayton. Mar. 29 1996. pp.
Pp. 555-557 (XP-002053927).
Weeden B.A. et al: "Alternative Methods for Custom Implant Production Utilizing a Combination of Rapid Prototyping Technology and Conventional Investment Casting," Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference, Dayton. Mar. 29, 1996. pp. 555-557.
Anderson D.L.: "Role of Rapid Prototyping in Prooperative Planning and Patient-Specific Implant Generation." Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference, Dayton. pp. 558-559, Mar. 29, 1996.

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