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JPS62125799

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DESCRIPTION JPS62125799
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of manufacturing a strong and rigid loudspeaker diaphragm. [Summary of the Invention]
A honeycomb-shaped core material coated with an adhesive at its end is disposed between two
skin materials made of thermoplastic resin, and heat and pressure are applied from the outside to
bond the skin material and the core material It is a manufacturing method of the photography
moving board for speakers made to do. K. PRIOR ART FIG. 2 is a cross-sectional view orthogonal
to the plate surface of a conventionally known speaker diaphragm, and is a core material in
which two flat plate-like skin materials 1 are formed into a honeycomb shape. An adhesive 3 is
fixed to both ends of the adhesive 2. However, because of such a structure, the area of the
bonding portion between the skin material 1 and the core material 2 is small, so the adhesion
strength is weak. Also, since the two skin materials 1 are flat, the rigidity is There was a
drawback of being inferior to SUMMARY OF THE INVENTION An object of the present invention
is to improve the drawbacks of the above-mentioned conventional apparatus, and to manufacture
a diaphragm for a speaker having a strong bonding strength between a skin material and a core
material and excellent rigidity. It is to provide a method. Means for Solving the K Problem In
order to achieve the above object, the present invention arranges a honeycomb-shaped core
material coated with an adhesive at its end between two skin materials made of thermoplastic
resin. Heat and pressure are applied to bond the skin material to the core material. K effect: In
this way, the skin material is deformed along the shape of the end of the core material to produce
unevenness, and the end of the core material is adhesively fixed in a state of being cut into four
parts of the back surface of the skin material. . K Embodiment An embodiment of the present
invention (two will be described with reference to FIG. 1). The same figure (a) is the state before
the adhesion | attachment, and the same figure (b) is sectional drawing without showing the state
after the adhesion | attachment, respectively. Between the two skins 1 made of thermoplastic
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1
resin such as polystyrene, polyethylene, polyamide, etc., a honeycomb core material 2 made of
aluminum, paper, plastic, etc. is coated with adhesive 3 on the upper and lower ends. Deploy.
Then, the surroundings are heated to 80 to 120 ° C., pressurized to several tens of atmosphere,
and kept as they are for one to several minutes. Then, as shown in FIG. 6B, the skin material 1
deforms along the shape of the end of the core material 2 to produce asperities 1a, and the end
of the core material 2 bites into the recess on the back surface. Adhesively fixed. In the above
embodiment, although pressure is applied from the outside of the skin material 1, pressure may
be reduced between the two skin materials 1 so that the pressure difference between the inside
and outside becomes several tens atm. Good.
In that case, it is necessary to form small vents appropriately on the wall surface of the core
member 2. Effect of the Invention As described above, according to the method of producing a
diaphragm for a speaker of the present invention, a honeycomb-shaped core material is disposed
between two skin materials made of thermoplastic resin, and heat and heat are applied from the
outside. By applying pressure to bond the skin material and the core material, the following
unique effects can be achieved. {Circle over (2)} The skin material is deformed along the shape of
the end portion of the core material, and both the provinces are in close contact with each other,
thereby increasing the bonding area and increasing the bonding strength. (1) The irregularities
formed on the skin material along the honeycomb shape of the core material have the action of
ribs to increase the rigidity of the diaphragm.
[0002]
Brief description of the drawings
[0003]
Fig. 1 ... (a) Bonding before and (b) bonding according to the embodiment of this invention Fig. 2
is a sectional view showing the state of gauze · · · Fig. 2 a sectional view of a conventional device
1 · · · Skin material 1a · · · · · · 2 unevenness · · · core material 3 · · · adhesive
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