Method of joining materials by mechanical interlock and article

Details Method of joining materials by mechanical interlock and article Method of joining materials by mechanical interlock and article

1984-06-07

1985-12-24

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

156276, 156298, 264274, 428147, 428161, 428323, 428327, B32B 310, B32B 704, B32B 3100

Patent

active

045606072

ABSTRACT:
Joining together two materials by a mechanical interlock resulting from "chips" at their interface is disclosed. The chips, composed of one of the two materials to be joined or of a third material are partially embedded into the surface of the first material when that material is formed so as to form surfaces which "overhang" the first material. Thereafter, the second material is formed against the overhanging surfaces of the chips to establish the mechanical interlock. This technique is particularly useful in anchoring a dissimilar material to a polymeric material having poor bondability and/or a high melt temperature, for example fluoropolymers, as illustrated by the forming of a liner for a pump casing, or the like, by rotational molding. In that illustration, small particles and chips are distributed uniformly over the surface of an enclosed mold heated to melt the particles and fuse the chips thereto, and cooled to form a layer with the chips projecting therefrom so as to provide an interlock when a casing is formed against the liner. Other aspects of the present invention include the article of manufacture formed by the above method.

REFERENCES:
patent: 572454 (1896-12-01), Shelmerdine
patent: 1516890 (1924-11-01), Pochin
patent: 2768923 (1956-10-01), Kepple et al.
patent: 3029475 (1962-04-01), Bastone
patent: 3126311 (1964-03-01), Harris
patent: 3630821 (1971-12-01), Miller et al.
patent: 4035547 (1977-07-01), Heller, Jr. et al.
patent: 4045603 (1977-08-01), Van Smith
patent: 4239797 (1980-12-01), Sachs
patent: 4254180 (1981-03-01), Kline
patent: 4460635 (1984-07-01), Jones et al.

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