Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Patent
1993-06-17
1995-02-28
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
15624415, 264171, 2642102, 4251311, 425327, 425363, 425385, B29C 5904
Patent
active
053934750
ABSTRACT:
A method and an apparatus for easily producing a double-sided surface fastener molded integrally in a simple process, which provides easy disengagement in spite of high engaging strength and high durability in repetitive use. A molten resin is extruded from an extrusion nozzle at the predetermined width and is introduced into a predetermined gap between upper and lower die rollers which are disposed up and down with the gap and are provided with a plurality of engaging element forming cavities on the respective peripheries and cooling means in the inner portions. The upper and lower die rollers are concurrently driven and rotated in the extrusion direction of the molten resin while filling the engaging element forming cavities with the molten resin, so that a plurality of hook elements are continuously molded integrally on the both front and back surfaces of a plate-like base portion and are cooled to the predetermined temperature. The engaging elements of cooled resin molded article are removed from the cavities and are positively drawn out in the extrusion direction of the molten resin.
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Murasaki Ryuichi
Nishiyama Hissai
Thurlow Jeffery R.
Yoshida Kogyo K.K.
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