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Hook-and-loop fastener manufacturing method

  • US 10,149,516 B2
  • Filed: 10/29/2015
  • Issued: 12/11/2018
  • Est. Priority Date: 11/07/2014
  • Status: Active Grant
First Claim
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1. A hook-and-loop fastener manufacturing method comprising:

  • an injection molding step of performing injection molding to form a molded production which a pillar group which is a set of a plurality of pillars and a base plate having a surface from which the pillar group protrudes are integrated into a unified body;

    a step of providing the base plate in a lower jig and the pillars of the pillar group in a plurality of holes in an upper jig, wherein a tip part of the pillar group protrudes from the upper jig;

    a cutting step of cutting the tip part of the pillar group to form a cut product with a small pillar group which is shorter than the pillar group;

    a removal step of removing the cut product from the upper jig and the lower jig;

    a melting step of melting the tip part of the small pillar group by arranging a heater with respect to the tip part of the small pillar group in a non-contact state to form pillar body portions which are non-melted portions and engaging portions which are melted portions and which have semispherical shapes so as to be thicker than the pillar body portions from small pillars constituting the small pillar group; and

    a cooling step of cooling the engaging portions to determine shapes of a plurality of engaging elements including the pillar body portions and the engaging portions having the semispherical shapes, thereby forming a mushroom hook-and-loop fastener in which an engaging element group which is a set of the plurality of engaging elements and the base plate are integrated into a unified body.

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