Importance

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Abstract

A method of manufacturing hook fasteners comprises a rotatable die wheel equipped with a water channel at the interior therein for cooling thereof via water flow, and a multiplicity of hook-shaped cavities disposed at the circumferential surface thereon wherein at both opposite sides of the die wheel are respectively situated an extrusion apparatus and a cooling device, and the extrusion apparatus is applied to extrude molding material like molten plastics via a set of upper and lower nozzle sections situated close to the circumferential surface of the die wheel and adjustably moved back or forth along with the extrusion apparatus so as to determine the thickness of base portions of hook members to be molded thereby. Therefore, molding material extruded from the extrusion apparatus is accurately filled into the hook-shaped cavities of the die wheel without other pressure wheel oppositely rotating relative to the die wheel as shown in a conventional molding method. Besides, via the aforementioned method, the extruded molding material can maintain sufficient molten temperature for direct and complete injection to the hook-shaped cavities thereof before properly cooled and solidified via the cooling device and uniformly removed from the hook-shaped cavities in the final molded form of the hook members, efficiently reducing the rate of defectiveness thereof.

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First Claim