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JPS61264898

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DESCRIPTION JPS61264898
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of manufacturing a laminated diaphragm for a speaker, and more particularly to
simplification of the manufacturing process. [Prior Art] FIG. 5 is a cross-sectional view showing
the shape (cone shape) of a conventional bonding diaphragm for a speaker, in which reference
numeral 1 is a back diaphragm, 2 is a front diaphragm, and 3 is the above. The bonded
diaphragm which formed the back side diaphragm 1 and the front side diaphragm 2 by bonding
is shown. FIG. 4 shows the respective states before the rear side diaphragm 1 and the front side
diaphragm 2 are bonded. Next, a method of manufacturing the laminated diaphragm 3 will be
described. In the case of using a resin-based sheet material such as a polypropylene sheet as the
front-side diaphragm 2, the laminated diaphragm 3 is formed in advance by vacuum molding or
the like. When a paper-made diaphragm is used as the back side diaphragm 1, it is formed in
advance into a shape of the pasted diaphragm 3 by papermaking or the like. Further, also in the
case of using a foamed material such as metal foam or expanded polystyrene as the back side
diaphragm 1, it is formed in advance into the shape of the bonding diaphragm 3. The back
diaphragm 1 and the front diaphragm 2 which are separately formed in this manner are bonded
together with an adhesive. Thus, the bonded diaphragm 6 described above is obtained. [Problems
to be Solved by the Invention] In the above-described conventional method for manufacturing the
pasted diaphragm for a speaker, the back side diaphragm 1 and the front side diaphragm 2 must
be separately formed, and the back side diaphragm Since each of the molding die 1 and the front
diaphragm 2 is required separately and a die for bonding these diaphragms 1.2 is also needed,
the cost of the die becomes high. There is a problem that it takes a long time to manufacture the
laminated diaphragm 6 because the dots are different and the back diaphragm 1 and the front
diaphragm 2 are separately formed and then bonded. This invention was made in order to
eliminate such a problem, the cost of a mold becomes low, and the manufacturing method of the
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bonding diaphragm for speakers which can manufacture a bonding diaphragm in single time is
obtained. The purpose is [Means for Solving the Problems] In the method of manufacturing the
bonding diaphragm for a speaker according to the present invention, the air-permeable
diaphragm substrate is formed into the same shape as the bonding diaphragm to be
manufactured and the vibration is generated. The plate base is set in a vacuum forming mold
having the same shape as the diaphragm base, and the sheet material attached with the adhesive
is heated and then placed on the vacuum forming mold to set the vacuum forming mold. Vacuum
drawing is performed, and a sheet material is laminated on the diaphragm substrate to obtain a
laminated imaging moving plate. [Operation] In the present invention, a sheet having an airpermeable diaphragm substrate molded in the same shape as the bonding diaphragm to be
manufactured in advance and attached with an adhesive is provided in a vacuum forming mold.
By placing a material and evacuating the vacuum forming mold, a sheet material is bonded to the
diaphragm substrate, and the bonding diaphragm 3 is formed.
An embodiment of the present invention will now be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing an apparatus used for manufacturing a bonding
diaphragm for a speaker, and FIG. 2 is a front elevational view thereof. In FIG. 1 and FIG. 2, the
code ¦ symbol 4 is resin system sheet materials, such as a polyvinyl chloride or a polypropylene
with which the adhesive agent was apply ¦ coated or laminated, and it becomes a front side
diaphragm of the bonding diaphragm for speakers manufactured. It is. Reference numeral 5
denotes a diaphragm base formed in the same shape as the bonding diaphragm to be
manufactured in a separate step in advance. The diaphragm base 5 is formed of a breathable
paper diaphragm. Moreover, this diaphragm base ¦ substrate 5 becomes a back side diaphragm
of the produced bonding diaphragm of the speaker. A vacuum forming mold 6 has a concave
shape similar to that of the manufactured laminated diaphragm. A heater 7 heats the sheet 4 to
enable vacuum forming, and a vacuum pump 8 is connected to the vacuum forming mold 6. The
diaphragm base 5 to be the back side diaphragm is set in the vacuum forming mold 6 described
above, and the sheet material 4 to be the front side diaphragm is softened by heating by the
heater 7 for heating and vacuum forming When it is in a suitable state, the mold is placed on the
vacuum forming mold 6 and the vacuum pump 8 is operated to evacuate the vacuum forming
mold 6. As a result, the sheet 4 is adhered to the above-mentioned diaphragm substrate 5 to
obtain a laminated diaphragm 9 for a speaker as shown in FIG. In FIG. 3, reference numeral 4
denotes the sheet material, and 5 denotes a diaphragm substrate. In the above embodiment, the
paper diaphragm is used as the diaphragm base 5, but a foam material such as a foam metal or a
foam polystyrene may be used. Further, in the above embodiment, a cone-shaped one has been
described as the bonding diaphragm, but the present invention can be applied to a flat bonding
diaphragm, and in this case, the same effect as the above embodiment can be obtained. . In the
above embodiment, although the back side diaphragm is constituted by the diaphragm base 5
and the front side diaphragm is constituted by the sheet material 4, the front side diaphragm is
constituted by the diaphragm base 5, and the sheet material The back side diaphragm may be
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constructed according to 4 and, in this case, as a vacuum forming mold, by using one having a
convex shape similar to that of the carefully laminated diaphragm manufactured as a vacuum
bonding mold, the above embodiment The same effect is obtained. According to the present
invention, as described above, since the sheet material is adhered to the air-permeable
diaphragm substrate formed in advance by a vacuum forming die, the back-side diaphragm as in
the prior art is used. The sheet material can be bonded to the diaphragm substrate at the same
time as the sheet / material is formed, by separately forming the front-side vibrator and then
bonding them with an adhesive. Therefore, there is an effect that the die cost can be saved
because the pasting type of the front side diaphragm and the rear side diaphragm, which was
conventionally required, is unnecessary.
Further, in the present invention, the process of forming the diaphragm base → bonding the
sheet material to the diaphragm base simultaneously with the formation of the sheet material is
followed, so that the conventional forming of the back side diaphragm → forming the front side
diaphragm → (1) Applying an adhesive to the back side diaphragm and the front side diaphragm
→ (2) Compared to the process of bonding the back side diaphragm and the front side
diaphragm, there is an effect that the time for manufacturing this bonding diaphragm is
shortened.
[0002]
Brief description of the drawings
[0003]
1 is a perspective view showing an embodiment of a manufacturing apparatus using the
manufacturing method button of the present invention, FIG. 2 is a front elevational view of a
longitudinal sectional view of FIG. 1, and FIG. 3 is affixing manufactured by the manufacturing
apparatus of FIG. FIG. 4 is a longitudinal sectional front view showing the laminated diaphragm,
and FIGS. 4 and 5 are longitudinal sectional front views showing different manufacturing
processes according to the conventional manufacturing method, and FIG. 4 shows a state before
bonding.
4: Sheet material, 5: Diaphragm base body, 6: Mold for vacuum forming, 9: Bonding diaphragm.
In the drawings, the same reference numerals denote the same or corresponding parts. Attorney
Attorney Attorney Attorney Attorney Figure 1: Figure 1
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