Ralph Disa Phones & Addresses
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6 Mcintosh Dr, Wilbraham, MA 01095 (413) 596-3232 (413) 222-5796
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Naples, FL
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Walpole, MA
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Boston, MA
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Norwood, MA
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6 Mcintosh Dr, Wilbraham, MA 01095 (413) 222-5796
Work
Position:
Construction and Extraction Occupations
Education
Degree:
Associate degree or higher
Publications
Us Patents
Cambered Core Positioning For Injection Molding
View pageUS Patent:
42838355, Aug 18, 1981
Filed:
Apr 2, 1980
Appl. No.:
6/136600
Inventors:
Frank T. Obrochta - East Hartford CT
Ralph E. Disa - Hampden MA
Ralph E. Disa - Hampden MA
Assignee:
United Technologies Corporation - Hartford CT
International Classification:
B22C 702
US Classification:
295276
Abstract:
Disclosed is a system for precisely locating a cambered ceramic core within the cavity of an injection molding die, such as is used to form patterns for lost wax method casting of gas turbine airfoils. A combination of at least two independent sets of locators are used: one set of at least three is fixed and contacts the periphery of the core while the other set of at least two is movable and engages the centerline of the core. The two sets independently limit the various degrees of core freedom and maintain its position during injection molding. The concave side of the core is preferably contacted by the fixed locators since this biases deviations into the convex side of the part from which excess deviant material is more readily moved.