Method for molding articles having non-planar portions from matt

Details Method for molding articles having non-planar portions from matt Method for molding articles having non-planar portions from matt

1981-12-24

1984-04-03

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

264122, B29J 506

Patent

active

044407084

ABSTRACT:
An article having non-planar portions, such as a pallet having a substantially flat deck member and a plurality of hollow leg members projecting integrally from the deck member, is molded as a one-piece unit from a loosely-felted, layered mat formed from a mixture of a resinous particle board binder and flake-like wood particles. The wood flakes have an average length of about 11/4 to about 6 inches, preferably about 2 to about 3 inches, an average thickness of about 0.005 to about 0.075 inch, preferably about 0.015 to about 0.025 inch, and an average width of 3 inches or less and no greater than the average length. Each layer of wood flakes in the mat lie substantially flat on a plane generally parallel to the major plane thereof and are randomly oriented to each other. The mat is placed between the male and female dies of a mold or press and compressed therein to substantially the desired shape under temperature and pressure conditions sufficient to bond the flakes together.

REFERENCES:
patent: 3354248 (1967-11-01), Haas et al.
patent: 3359929 (1967-12-01), Carlson
patent: 3611952 (1971-10-01), Hoffman

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