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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of manufacturing a speaker vibrator in which the three layers are bonded by supersmoothing in the manufacture of a three-layer honeycomb horizontal ring-shaped speaker
vibrator. [Prior Art] As a characteristic generally made into ice by a speaker diaphragm, firstly
the specific elastic modulus of the vibrator (hereinafter 1: i !! It is called 8 / ρ. E elastic modulus,
ρ is the density) or higher. It is required to have an internal loss of 21 CJ, and third, to have a
low mass. Here, increasing E / ρ increases the piston movement area of the speaker, increasing
the internal loss smooths the frequency characteristics in the high region, reducing the mass a
Each of these is a necessary property to enhance. Therefore, in the case of a single-plate vibrator
mainly made of one paper pulp for the purpose of increasing E / ρ conventionally. A method
(Japanese Patent Application Laid-Open No. 57-203396) is often used in which monofilament
fibers such as inorganic fibers such as glass fibers and carbon fibers and hololand fibers are
mixed. Further, even in the case of a single plate of plastic material, it is considered that various
types of single machine / inorganic fibers and inorganic fillers are mixed (Japanese Patent
Application Laid-Open Nos. 58-3499 and 11857-206197). However, these methods are limited
to the 6ε volume of the fibers and fillers, and it can be desired to increase E / ρ4. In this case, if
the mixing amount of the filler or the like is increased, the mass is increased and the efficiency is
reduced accordingly, resulting in PM. Also, in order to increase the internal loss, 1 the paper pulp
diaphragm is impregnated with various organic paints, or the vibrator is sprayed with paint
(Japanese Patent Publication No. 5,5-8079 #). The method of sticking to a board (Japanese Utility
Model Publication No. 58-19917) is used, or the internal loss increases with these methods,
conversely, E / が decreases or weight increases and efficiency decreases, etc. There is a
disadvantage of There are also other attempts, or vibrators with simple configurations, E / と,
and both internal loss requirements to meet most R 摩 m Ju [s]. From the above, recently, E / ρ
is a cylinder, an appropriate internal loss 7f: a peristaltic root to chest 4J, metal, sail. A
honeycomb core consisting of a writing film with a cylindrical molecule reducing agent l is used
as a core, and all the electrodes, A'd 瑞 molecular coating and crosspieces 14 are formed on both
sides of this core, a thin film of a fat-formed product A so-called three-layer skin phase is formed
as a skin phase j; a diaphragm (honeycomb diaphragm) made of a so-called three-folded plate +
tif structure is opened. In order to combine the properties of the honeycomb core and the surface
skin layer, ie, the adhesion of the skin phase V (the adhesive used or the overall characteristics of
the diaphragm), this sandwich structure is combined.
There are various ideas for the adhesive used. For example, in order to increase internal loss
without lowering the value of ρ or 方法, a method using an adhesive in which a proper amount
of flake-like mica or granular 7 rica etc. is compounded in an epoxy resin (% JP 58- 29000)). A
method of increasing the adhesive strength while preventing the deterioration of l #
characteristics using a foamable adhesive (Japanese Patent Application Laid-Open No. 55102995), using a non-woven or film-like hot melt adhesive 2 as the adhesive Various methods
such as a method of uniformly bonding with a very small amount of a sizing agent and a method
of using a first-experience dressing (Japanese Patent Application Laid-Open No. 57-183198)
have been carried out. However, in all of the above methods, the point of using an adhesive is the
same, and an increase in the amount of charge of the entire diaphragm due to the use of the
adhesive can not be avoided. The decrease in efficiency due to the increase in weight like
vibration or vibration is inevitable as long as the adhesive is used. 41a of the Invention In order
to eliminate the above-mentioned disadvantages of the present invention, the present invention is
directed to removing the above-mentioned skin phase from thermodiversity functional materials
on both sides of a honeycomb core made of thermoplastic material. By laminating the skin phase
on both sides of the honeycomb core by supersonic wave, no adhesive is used for the honeycomb
core and the skin of the skin material, and therefore it is possible to make it into a fireflying
property and a p4 property. It is an object of the present invention to provide a method of
manufacturing a nouvaker diaphragm. BEST MODE FOR CARRYING OUT THE INVENTION
Inventive Example 1 This invention VC relates to a honeycomb core and a skin phase. For
example, hard polyvinyl chloride HF1. Cellulose acetate resin 1 reinforced polypropylene side fat
and polysulfone (consisting of thermoplastic materials such as chopped fat). In addition, when
making a measure by giving a protrusion to one side of the hexagonal shape of the honeycomb
core, when performing super-welding water, the super cedar and moth energy will be attached to
the protrusion all year round, and bonding or equalizing -e (core Because it is carried out firmly
over the entire end face, the operation l1i11 degree. In terms of ease of adhesion and evenness
of contact, it shows favorable results and is preferable. The present invention will be described in
more detail by way of the following examples, but it does not add to the present invention.
Practical Example 1 Referring to FIG. 1 to FIG. 3, a method of forming a protrusion on each side
of a hexagonal shape of a honeycomb core will be described. FIG. 1 is a cross-sectional view of a
raw material chisel body of a honeycomb core before extension. A film of a thermoplastic
material which is a + 111'-J 'honeycomb core filler, (2I is, for example, an epoxy-based adhesive.
FIG. 2 (a) is a cross-sectional view of the first house taken along a line a-'lla and a cross-section
cut to form a protrusion Ill, (2+ is the same as FIG. 1, and t31 is a protrusion It is.
When FIG. 2 (b) is obtained by cutting FIG. 2 (a) by a predetermined N dK, the view E is 1 and the
arrow indicates the extending direction of the honeycomb core. FIG. 3 is a partial perspective
view of the honeycomb core after extension. 2) As shown in FIG. 1, a laminate obtained by
increasing the number of honeycomb core joints (1) with a predetermined number of contacts
N8 + is cut as shown in FIG. 2 (a) so as to form projections (31; As shown in FIG. 2 (b), a
predetermined protrusion f 31 τ is formed and cut in the same manner as described above so as
to be a predetermined honey cam core, and then extended in the direction of the arrow to make a
protrusion on each side of the hexagon shown in FIG. It is possible to obtain a honeycomb
honeycomb core. According to the above-mentioned method, a 60 μm thick hard 3-vinyl
chloride resin (PVC) ir (more, a honeycomb core as shown in FIG. 3) was obtained. The cell size of
the honeycomb core used is 4 mm and the thickness is as shown in FIG. 3 with the base i, am and
0.3 'mln triangular projections (3) at the center of each side. l or 3.0 m of (LJ4 quality PVC made)
・ I made 4 t of nick core. A 75 .mu.m hard PVC film was also used as the skin phase, and one
was fitted to both sides of the projection (31 k Ii) -bonded honeycomb core. Next, using 4cIn,
X20 バ ー bar horn, 1 oscillation alb s x Hz at a pressure of 03 to 0.5 Kg / cnL, 1 s to 2 s
ultrasonic wave Ji 9 * f 'f i at a collective injection of an output of 1 5 KW, 3 I * T I obtained a
diaphragm with a sand-in-inch structure. The sample of 4t was cut into a strip of 2ryn × 10 cm,
and the carrier / ρ and internal loss were measured by the vibration reed method. At the same
time, one side was measured, and the measurement results are shown in Table 1. Example 2 As
in Example 1, a 60 μm JV, hard increase vinyl resin (pvc) with a cell size of 3 Rm, a thickness l
of 3.0 關 and a low side U 311 at the center of each side of the cell. Obtain an una honeycomb
core as shown in the pJJs diagram with triangular projections (3) with lA, iv / l 0.3 fight. The core
screen was sandwiched with a 29 μm, 75 μm hard g p v c film. Next, ultrasonic bonding was
performed for 2 seconds at an oscillation frequency of 1 gKHz and an output of 1.2 KW. The tool
horn is 4! Bonding was performed with an X20 CrfL bar horn at a pressure of 0.3 Kg / cIn. From
this, strip-shaped test piece gold cutting out of 2 cm × 10 crf L 1 weight and E / ρ and internal
loss were measured. The measurement results are shown in Table 1. Comparative Example As in
the case of the first and second embodiments, the cell size is 4ψ, the cell size is 30 鰭, and the
cell size is smm, the thickness is 3. , Omm got two cam core.
A hard PVC film of 15 μm is prepared as a skin phase, and a room temperature curing type
epoxy yarn adhesive is applied to a thickness of 50 μm using a bar coater sound on a 4 f quality
PVC film as a skin material. And allowed to cure at room temperature for 24 hours. The product
was cut into strips of 2 crIL × 10 cwL to measure E / 、, internal loss and weight, and the
measurement results are shown in Table 1. Comparative Example A real 611i by 0tJP'Lc of 260
μm thickness. As in lJ2, a 5 m thick (7) hard film is prepared using a Ni nicum core with a cell
size of 3 + n + i and a J ¥ 3.0 capital as a chemical conversion material, and a 50 μ m thick
ethylene / vinyl acetate system (melting point 95 Using the thermally activated film-like
adhesive, and the above-mentioned honeycomb core and skin phase at C. for 30
seconds] b1. Heat and pressure bond with IKg / Crn. This is cut into short-1111 shapes of
2CInX10, and E / ρ, internal loss and weight are added, and the measurement results are shown
in Table 4-0. The samples produced by this method can be made lighter than methods using
contact agents. That is. According to this invention against what was adhered with epoxy
adhesive 11? The lJ structure is 13% at cell size 47 fi + Il and 11% rH at cell size 3 + ++ t. In
addition, as compared with 1 active film soft adhesive, it was possible to achieve as much as 25%
lightness and HH. In addition, it is 2-3 times higher than the one using E / け km agent, and the
internal loss is as high as that when using a heat activated photosensitizer, but using a milk- (,
epoxy adhesive It was nine minutes on a real piece at 60 to 70 percent. A large-diameter (32
crIT, bass) speaker vibration 81t is created using the cell size 3 of Example 2 of Table 1 and
Comparative Example 1 between the cell sizes 3 and its output signal (an)-+ * + wave a () Iz) The
one with Qjl characteristics is shown in FIG. Figure 4 song & lA. B is Example 2 of Table 1,
respectively. It freezes with the characteristic corresponding to the thing of the cell size x 3im of
the comparative example 1. FIG. As apparent from FIG. 4, the diaphragm according to the present
invention can be seen to be a plate with a high pitch range and a high efficiency, and yet it is a
commercially available vibration plate. In addition, according to the present invention, since the
bonding time is reduced to 1 mm thick, mass productivity is greatly improved. [Effects of the
Invention] As described above, according to the present invention, the skin phase consisting of
the heat 5J plastic filler is laminated on both sides of the honeycomb core consisting of hotopening plasticity pouring, and the above-mentioned skin material is made the honeycomb core
by ultrasonic wave. By bonding '1- on both sides of the.
(I) Improving the efficiency and improving the specific elastic modulus by reducing the adhesion
between the honeycomb core and the skin material without using an adhesive, and further, a
method of manufacturing a speaker diaphragm having a greatly improved mass productivity.
Complete 6F
Brief description of the drawings
Mud 1 is a cross-sectional view of a raw material laminate of a honeycomb core before
stretching, and FIG. 2 (a) is a cross-sectional view of the a-flal 1M cross-section of FIG. 1 cut to
form a projection, FIG. 1) is a perspective view of a honeycomb core cut to a predetermined
k'J3 Figure is a partial perspective view of the honeycomb core after expansion, Figure 4 is the
correlation between the sound pressure (clB) and the frequency 19 () iz of the diaphragm using
the diaphragm according to the present invention and the conventional adhesive Is a frequency
characteristic diagram showing In the figure, (1) is a honeycomb core material, +21 is an
adhesive, (3) is a protrusion, and (N is the characteristic of the diaphragm according to the
present invention. (The phrase indicates the characteristics of the diaphragm according to the
conventional method. In FIG. 1, the middle-symbols indicate the same or corresponding parts.
Agent Oiwa Masuo
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