Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Patent
1995-01-03
1996-10-29
Robinson, Ellis
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
428 71, 428 73, 428 76, 428178, 4283171, 244133, B32B 312
Patent
active
055695086
ABSTRACT:
A process for making a layered product having a honeycomb core having cells filled with a foam material, the process comprising the steps of: (a) placing a first layer of an uncured, heat-expandable, foamable material on the top side of a central honeycomb core having empty cells, and placing a second layer of an uncured, heat-expandable, foamable material on the bottom side of the central honeycomb core; (b) placing a first layer of an uncured preform material above the first layer of uncured, heat-expandable, foamable material, and placing a second layer of an uncured preform material above the second layer of uncured, heat-expandable, foamable material; (c) placing the charge made by steps (a) and (b) inside a mold and closing the mold; (d) heating the mold to the cure temperature of the heat-expandable, foamable material, and holding the mold at this temperature for sufficient time to expand and cure the heat-expandable, foamable material; (e) reducing the temperature of the mold to the injection temperature of a selected resin transfer molding (RTM) resin system, and injecting the selected resin transfer molding (RTM) resin system into the mold; (f) holding the temperature of the mold at the cure temperature for the resin transfer molding (RTM) resin system for sufficient time to cure the resin system; and, (g) removing the product from the mold after curing is completed.
REFERENCES:
patent: 2227212 (1940-12-01), Beck
patent: 2745779 (1956-05-01), Ritter et al.
patent: 2839442 (1958-06-01), Whitaker
patent: 3655818 (1972-04-01), McKown
patent: 3857217 (1974-12-01), Reps
patent: 4162341 (1979-07-01), Norton
patent: 4353947 (1982-10-01), Northcutt
patent: 4622091 (1986-11-01), Letterman
patent: 4765942 (1988-08-01), Christensen et al.
patent: 4879152 (1989-11-01), Green
patent: 5061418 (1991-10-01), Ware
patent: 5089328 (1992-02-01), Doerer et al.
patent: 5135799 (1992-08-01), Gross
patent: 5186999 (1993-02-01), Brambach
patent: 5234757 (1993-08-01), Wong
patent: 5284702 (1994-02-01), Umemoto et al.
patent: 5338594 (1994-08-01), Wang
patent: 5445861 (1995-08-01), Newton et al.
A. W. Alteneder et al., Processing and Characterization Study of Honeycomb Composite Structures, Proceedings 38th International SAMPE Symposium and Exhibition, May 10-13, 1993, Anaheim, California.
Kirk-Othmer, Encyclopedia of Chemical Technology, Fourth Edition, 1993, vol. 7, pp. 1, 18, 27, and 28.
Material Safety Data Sheet, 3M PR 500 Molding Resin, issued Apr. 26, 1992, 3M General Offices, St. Paul, Minnesota, pp. 1-4.
Chemical Handling Requirements, 3M PR 500 Molding Resin, Document No. A-1330-CHR-0538, dated 21 Jul. 1992 (one page).
Boeing Material Specification, BMS 8-245K, Adhesive for Composite Bonding (350.degree. F. Cure), revised 29 Sep. 1994, pp. 1.varies.17.
Boeing Material Specification, BMS 8-245K, Qualified Products List, 29 Sep. 1994, pp. 1-2.
Material Safety Data Sheet, Dexter Aerospace, SYNSPAND X98993, printed Jun. 24, 1994, pp. 1-5.
Cullom, Jr. Paul C.
Robinson Ellis
Speer Timothy M.
The Boeing Company
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