Apparatus for encapsulating an article in molded polyurethane

Details Apparatus for encapsulating an article in molded polyurethane Apparatus for encapsulating an article in molded polyurethane

1974-02-25

1976-12-28

Lazarus, Richard B.

Static molds

Uniting preform with molding material

Including means other than mold surface to support preform

249157, 249158, 249162, 425441, 425817R, B29C 602

Patent

active

039997367

ABSTRACT:
An apparatus for encapsulating an article within a plastic foam material, such as polyurethane, wherein the article to be packaged is placed within a mold cavity of an adjustable mold, the walls of the mold are adjusted according to the size of the article and a liquid polymericisocyanate mix is injected into the mold cavity and allowed to react to form an insoluble, flexible, polyurethane foam which completely encapsulates the article. After the urethane has set, the mold walls are retracted and the encapsulated article is removed. The apparatus consists of a mold form having a base plate and four upstanding movable side walls which define a mold cavity. Each upstanding wall is movable with respect to the other walls thereby to allow for a wide variation in the size of the mold cavity to accommodate wide variations in article size.

REFERENCES:
patent: 785272 (1905-03-01), Robbins
patent: 1591558 (1926-07-01), Pike
patent: 1678266 (1928-07-01), Niestradt
patent: 1816921 (1931-08-01), Urschel
patent: 2136432 (1938-11-01), Gattuso
patent: 2711580 (1955-06-01), Conway
patent: 3049769 (1962-08-01), Schultz
patent: 3642400 (1972-02-01), Theodorsen
patent: 3757617 (1973-09-01), Fabbri
patent: 3781159 (1973-12-01), Lidl

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