Method and apparatus for molding threaded articles
Abstract
Abstract A METHOD AND APPARATUS FOR MOLDING THREADED ARTICLES. THE APPARATUS IS COMPOSED OF A FEMALE MOLD, A ROTATABLE SLEEVE, AND MEANS FOR ROTATING THE SLEEVE. THE FEMALE MOLD HAS SIDE WALLS FORMING A MOLD CAVITY AND HAS A LONGITUDINAL HELICAL SLOT THROUGH THE WALLS. THE SLEEVE HAS A CHAMBER FORMED BY CHAMBER WALLS AND HAS A LONGITUDINAL HELICAL DEFORMATION WHICH IS ALIGNED IN REGISTER WITH THE SLOT IN THE FEMALE MOLD. THE SLEEVE CAN BE ROTATED SUCH THAT THE DEFORMATION THEREON EXTENDS LATERALLY THROUGH THE SLOT IN THE FEMALE MOLD. THE APPARATUS CAN ALSO INCLUDE A HEATING MEANS FOR HEATING A SHEET OF PLASTIC MATERIAL AND MEANS FOR FORCING THE SHEET INTO THE MOLD CAVITY. IN THE METHOD, THE SLEEVE IS ROTATED UNTIL THE DEFORMATION THEREON IS POSITIONED WITHIN THE SLOT IN THE MOLD CAVITY. A SHEET OF HEATED MATERIAL IS THEN DRAWN INTO THE MOLD CAVITY AND OVER THE DEFORMATRION EXTENDING THEREINTO. THE SHEET IS THEN COOLED, THE DEFORMATION ROTATED OUT OF THE SLOT AND AWAY FROM THE FORMED ARTICLE, AND THE ARTICLE IS REMOVED FROM THE MOLD CAVITY.
Inventors
- 👤 Thomas J Alexandris
Bibliographic Details
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| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
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