Method for forming articles having deep drawn portions from matt

Details Method for forming articles having deep drawn portions from matt Method for forming articles having deep drawn portions from matt

1990-02-12

1990-10-02

Theisen, Mary Lynn Fertig

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

108 511, 108 533, 108901, 264119, 264258, 264320, B65D 1931, B29C 4318, B32B 3104

Patent

active

049605534

ABSTRACT:
An article having non-planar portions, such as a material handling pallet, including 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 mat formed from a mixture of resinous particle board binder and flake-like wood particles. The leg members are preformed in a separate preform mold or the article forming mold and the mat is deposited on the female die over mold cavities containing the preforms. When the article forming mold is closed, the mat and preforms are compressed into substantially the desired shape and size under temperature and pressure conditions which bond the wood particles of the mat and the preforms together to form a unitary structure.

REFERENCES:
patent: 4061813 (1977-12-01), Geimer et al.
patent: 4248163 (1981-02-01), Caughey et al.
patent: 4408544 (1983-11-01), Haataja
patent: 4440708 (1984-04-01), Haataja et al.
patent: 4790966 (1988-12-01), Sandberg et al.

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