Method for encapsulating an article in molded polyurethane
Abstract
Abstract A METHOD AND 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 POLYMERUC-ISOCYANATE MIX IS INJECTED INTO THE MOLD CAVITY AND ALLOWED TO REACT FO TO ORM 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 ACCOMODATE WIDE VARIATIONS IN ARTICLE SIZE.
Inventors
- 👤 T Theodorsen
Bibliographic Details
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