Foam tooling removal method

Details Foam tooling removal method Foam tooling removal method

1990-07-05

1991-10-15

Woo, Jay H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156197, 51411, 264317, 264139, B24C 106, B24C 304

Patent

active

050571745

ABSTRACT:
A technique is provided for removing foam mandrel material from a stiffener section of a composite structural member as is employed in lightweight aircraft skin structures. The technique involves the direct pressure glass bead blasting of the mandrel material. By mounting a blasting nozzle within a rubber hose of larger diameter, an airstream containing glass beads may be directed outwardly through the nozzle while evacuating pressure is created in an annular passageway between the hose and the nozzle to evacuate mandrel foam particles as well as spent glass beads. The result is a clean channel within the stiffener section.

REFERENCES:
patent: 1890164 (1932-12-01), Rosenberger
patent: 2087694 (1937-07-01), Malmros
patent: 2457021 (1950-02-01), Sterns
patent: 2739424 (1956-03-01), Fritze
patent: 2951319 (1960-09-01), Kornhaus
patent: 3286406 (1966-11-01), Ashworth
patent: 3914815 (1975-10-01), Kobayashi
patent: 3965233 (1976-06-01), Ritter
patent: 4314427 (1982-02-01), Stoltz
patent: 4424183 (1984-01-01), Nelson
patent: 4721593 (1988-01-01), Kowal
Wet Blasting Process for Cleaning and Finishing of Rubber Molds; by E. Anderson; Rubber Age; Apr. 1953, pp. 71-72.

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