Spiral sprue loop

Details Spiral sprue loop Spiral sprue loop

1990-02-02

1990-11-27

Seidel, Richard K.

Metal founding

Process

Shaping a forming surface

164133, 164361, 164362, B22C 904

Patent

active

049728970

ABSTRACT:
Apparatus useful in forming a mold from a wax pattern in an investment casting process, the invention provides a loop element having arm elements which spiral downwardly from and inwardly of the loop element to a base element. Sprue pins mount wax patterns to the loop element in a casting process known as the "lost wax" technique, the apparatus of the invention being particularly useful in the environment of a dental laboratory for formation of crowns and the like of high density. The loop element and arm elements of the apparatus leave channels in the investment material on "burn out" which quickly accelerate a casting material, such as a metal alloy, into the formed mold or molds with a reduction of turbulence which results in fewer defective castings. The channel geometry provided by the apparatus provides benefits due to a lack of right angles or sharp corners which restrict the flow of casting material into the mold or molds.

REFERENCES:
patent: 2196505 (1940-04-01), Morton
patent: 4396054 (1983-08-01), Cole
patent: 4542780 (1985-09-01), Almer
patent: 4558841 (1985-12-01), Engelman et al.
patent: 4676294 (1987-06-01), Berger
Preat Corporation, Preci-Roto Sales Brochure, Copywright 1981, 452 Penn Ave., San Mateo, Calif. 94401.

Affiliated with

Also associated with

Rating

Spiral sprue loop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spiral sprue loop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spiral sprue loop will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1026867