Continuous molding method and molding apparatus for surface fastener
A technology for fasteners and equipment, applied in fasteners, fastener components, household components, etc., can solve the problem of increasing the number of parts in the drive system, and achieve the effect of strengthening the bonding strength and increasing the bonding area.
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no. 1 example
[0031] figure 1 Shown is a longitudinal sectional view showing a continuous molding apparatus and a molding process for molding a surface fastener according to a first embodiment of the present invention. Although the present embodiment employs hooks as engaging elements formed on the surface of the base member, the present embodiment is not limited to this structure and other various types such as an umbrella type or a double leaf type may be employed. The molded surface fastener of this embodiment is a general surface fastener and no special notches or engaging rows are formed on the back surface of the flat base member without engaging elements.
[0032] In the figure, reference numeral 1 denotes a (continuous) extrusion die, and the front end of the extrusion die 1 is formed as a peripheral surface 1a having a curvature that allows Form a predetermined gap. The extrusion die 1 is constituted by a T-die, and as shown in the same figure, a substantially rectangular tubular...
no. 2 example
[0039] Next, a second embodiment of the present invention will be described. image 3 Shown are a continuous molding apparatus for molding a surface fastener and a molding process thereof according to a second embodiment of the present invention. Figure 4 is in image 3 Sectional view taken along line IV-IV. In these figures, what is largely different from the first embodiment lies in the shape of the peripheral surface 1a of the extrusion die 1 lower than the resin extrusion port 1b. Other structures are basically not different from the first embodiment. Therefore, in the following description, parts different from the first embodiment will be explicitly described and the same components will be briefly described.
[0040] According to this embodiment, if Figure 4 As shown, a plurality of groove-forming passages 1f are formed in parallel on the circumferential surface 1a of the molten resin reservoir 1c formed at a position lower than that formed on the front surface of...
no. 3 example
[0044] Figure 6 Shown is a section of a continuous molding portion of a molded surface fastener according to a third embodiment of the present invention. The present embodiment relates to a continuous molding apparatus for a molded surface fastener having an engaging row inserted between a mounting frame and a sheet material so that the sheet such as a curtain The material is attached to the mounting frame.
[0045]Although the present embodiment differs from the second embodiment in size, the structure of the main parts and its molding process are not largely different from those of the first and second embodiments. The aspect different from the first and second embodiments lies in that one or more joint row forming passages 1h having a reverse T-shaped cross-section are formed in the center of the width direction of the peripheral surface 1a of the extrusion die 1, and the reverse T-shaped One end of the section communicates with the resin extrusion port 1b and the other ...
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