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JPS57122992

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DESCRIPTION JPS57122992
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a conventional raw material of
a speaker edge, FIG. 2 is a cross-sectional view of an essential part of a forming and cutting
process for obtaining a speaker edge from the same raw material, and FIG. 7 is a top view
showing an embodiment of the speaker edge of the present invention, FIG. 4 is a sectional view
thereof, FIG. 5 is a perspective view of a raw material of the speaker edge, FIG. 6 is an
explanatory view of a cutting step of the raw material, FIG. FIG. 8 is a perspective view of the
both-end joining process, and FIG. 8 is a cross-sectional view of the main part of the forming and
cutting process. 4 иии и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
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и и и и и и и и и и и и и и и и и и и и и и и ? 5 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и.
Hoop material (raw material).
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker edge
which can be obtained without loss from raw materials. As a speaker edge made of a
conventional foam or cloth impregnated with a synthetic resin or rubber, as shown in FIG. 1, the
raw material 1 of a square which is larger than the diameter of the speaker diaphragm is shown
in FIG. It was set in a mold 2.3 as shown, and was ring-shaped by the molds 2 and 3 in a ring
shape) and cut into ? to obtain a seamless Eno 7?C speaker. In the edge for a speaker
according to this configuration, the utilization factor is about 30% with respect to the raw
material 1, and the remaining 70% is discarded as punching scrap. In addition, the edge material
may be expensive, and the effective utilization rate of the material is extremely low, so that the
speaker edge has a significant disadvantage of being extremely expensive. As described above,
the present invention eliminates the conventional drawbacks. Hereinafter, embodiments of the
present invention will be described with reference to FIGS. 3 to 8. FIG. First, one embodiment of
the speaker edge according to the present invention will be described with reference to FIGS. 3
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and 4. FIG. 4 is an end for a speaker, and a sticking portion to a frame at the outer peripheral
edge 6. Attached to the diaphragm at the inner peripheral edge, etc., and the semicircular part 7
at the middle, the material is made of foam, band-shaped hoop material impregnated with resin
or rubber in cloth, and partly made of 71 6) has a section 8), that is, a speaker edge 4 of FIG. The
hoop material 9 is cut into a trapezoidal shape as shown in FIG. 6 and wound into a ring shape as
shown in FIG. The cut parts at both ends are parallel and joined so that they overlap partially,
and this is set in the molds 10 and 11 as shown in FIG. 8 and heated and pressurized by this
mold 10.11 to be formed into a predetermined shape It is cut into a predetermined size, and the
overlapping portion at both ends is further fusion-bonded to form a speaker edge 4 shown in
FIGS. 3 and 4. According to this configuration, the utilization factor of the hoop material 9 which
is the raw material can be 90% or more. As described above, since the speaker edge according to
the present invention is formed by joining hoop-shaped raw materials in a ring shape and is
formed into a predetermined shape, 90% or more of the raw materials can be effectively used
and only a few loss parts This can be extremely advantageous for reducing the cost as a speaker
edge, has excellent productivity, and can be practically used as a dog.
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