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JPS5694897

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DESCRIPTION JPS5694897
Item μ (1, name of the invention
How to make a fibrous diaphragm
3. Detailed Description of the Invention This invention d relates to the improvement of the
method of manufacturing a so-called cone-like speaker fiber four-disc diaphragm, and it is an
object of the present invention to obtain good quality products. The vibration of the speaker U1
叛 is well known, and the vibration of the voice coil Uih (t (気 111 を 1、1、1、1、1 放射 1 放射
1 放射 1 放射 1 放射 1 放射 1) And this vibration exhibits the vibrational state of the gods
according to a wide frequency between 16llz and as high as 25.000112. That is, at a low
frequency, so-called “piston movement rfd + is performed such that the entire surface of the ej
plate vibrates + fn + with the same phase at a low frequency, but the frequency becomes higher V
(1) 1 and then, when the frequency becomes higher, the concentric node division lifts U1 that
perform a plurality of concentric factorial node division vibrations are opposite to each other (the
adjacent portions of the in phase interfere with each other and the sound pressure f If the
frequency is further increased without moving to the outside, only the vibration i # force at the
top of the diaphragm becomes old as the sound pressure. As such a diaphragm, as a physical
property of the sound pressure that is generated by vibrating to the input signal over the entire
reproduction frequency, light fan, high rigidity internal loss, homogeneity, etc. Be billed].
EndPage: Father, shake like this! l1IIA evening is usually the following more than conventional
one. : Made through Jf '! 8tlる。 1. Suspend the desired fiber in water. Between the same
tubular "two-part tank 1" and the funnel-shaped lower tank 3 with the drainage cock 2 at the
outlet, open the mesh 4 if west, ii "i brow 2 and drainage cock 2; When the suspension water of
the two-part tank 1 is made by making paper 1 and draining through 1 through 4, fibers can be
deposited on the surface of the net 4. This deposition is the product of the diaphragm. The
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product is either dried as it is or hn heat pressed with a hot mold to obtain the product. However,
it has been difficult to satisfy the aforementioned properties that have long lasted depending on
conventional manufacturing methods. For example, in the former method, light weight (low
density) and internal loss are worth practical use, but since the fiber deposition state at the time
of paper making remains to that f, sufficient rigidity is obtained because the degree of adhesion
between fibers is small In addition, when the paper is made, a ridge-like protuberance is
generated on the opposite side of the fiber network of the fibrous layer, and the density of this
part is extremely small compared to the other parts. Homogeneity recurs. Also, the latter one r
(applicable J, d of the present invention)? I will explain in detail both Akiyoshi, or heating X, ([[I'll
predict by the shrinkage of the 'suggishly hard-to-get problems have seven drawbacks.
This invention 1d 7 is also intended to solve the defect of Y rice amount, but J and the small goni
step diagram in FIG. 2 below will be described in detail. FIG. 2 is a drawing showing the extent of
'JJ, if' fIT of the present invention, and 2 'is a papermaking process. Since this process has not
changed in the past, the explanation and the explanation are omitted. 22 is a transposition step,
which will be described with reference to FIG. 3a, 1]. The rotary li'i "net 32 is disposed on the
cylindrical base 31 and the paper forming step 21. The paper net 33 is placed so that the
deposited fiber layer 34 is opposed to the reverse tFr net 32 at a minute interval. Then, cover the
upper container 34 and send compressed air into the SA compartment. Then, the fiber layer 34 is
displaced A '41482 (F is moved (first displacement)) at the pressure VC of the compressed air.
Then, in FIG. 3, a hatched first layer 34 laminated on the transposed net 82 is shown in FIG. 3. ":
Then, the molded net 36 is transposed in the same process (second transposition). Since the
worm-like protuberance generated in ml of l -'- and not facing the paper network 33 of the fiber
layer 34 is pressed by the air pressure in the wet state by the air pressure during the paper
making process by this drying process, it is not unreasonable. It can be complimented. Further, in
the weir facing the papermaking mesh 33, there is a squeezing by the fibers clogged in the
meshing of the meshing 33 in the papermaking, but the air pressure at the first displacement and
the pressing on the forming mesh 36 at the second displacement. The pressure disappears and
the surface becomes smooth 1 to extinguished by the pressure. 23 is a process of pressing gold
at normal temperature. This is a step of pressing the non-heated (normal temperature) gold layer
fllI4 onto the 11-shaped netting 36, which is the old fiber layer 34. Usually, when heat pressing
is performed, there is an action of evaporation of water contained in the fibers due to heat, and
adhesion and bonding of the fibers by compression and pressing. In other words, apart from the
parts that are in contact with each other at the time of papermaking, there is space for each
other. The parts that are in contact with each other are in contact due to the compression J and
the adhesion '+1 bonding force (stiffness) is increased. However, when the conventional heating
press is performed, heat is applied before the fibers overlap due to the press. As a result, the
water in the fibers evaporates and sweetens, and as a result, the fibers become thin and pressure
is applied in this state. Therefore, while the bonding area of the fibers is significantly reduced, as
a result, the bonding strength is decreased, but in the present invention, the fibers are wet
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because the fiber layer in the wet state is pressed without heating. In the next hot air drying step
24, the moisture of HMfrll evaporates, but the fibers of the fibers are in contact with each other
(partially, By the pressing process 23, the state of "adhered" and / or the state (/ (there is,
therefore, the adhesion part divided and put in contact with each other) and the correction of the
state (the state is maintained.
EndPage: 2 "1" results in adhesion of the fiber portion "without reducing the thickness of the
fiber, but it is in a state of generating a large number of (4) で 4 司 as it evaporates due to
moisture. In addition, as described later, the congenital cave is effective for Fit 'density of the
vibration. 1 glued to the history]] fiber other than 1 curse 4 'H 44 minutes by warm air drying ·
glands, the fiber M (becomes thinner, but at the adhesive part of both ends [paper fiber thickness
of 1 no In this case, it is possible to reduce the thickness of the fiber very small, as compared
with the prior art. According to the manufacturing method of the present invention, it is clear
that it is not necessary]] 1 mm on the plate 11v1 firstly, firstly, in the transposition step, the
earthworm-like protuberance inevitably generated in the paper forming step is reasonably
generated Since the pressure can be reduced, the homogeneity of the plate dD and I is extremely
I (Ir). jl '! , 2 vc, constant width l / l and so on, so that the above-mentioned <Fiber comrades hold
the thickness at the time of making the sheet straight, so that 1 conjuction 1 (1 Conquers and
becomes large, and the rigidity becomes 11 ° j, with the cohesion of the fibers and the human
and the human being. Third, since the fibers are adhered and then dried in the above-mentioned
normal temperature step, shrinkage of the fibers is extremely small, and a predicted cavity is
generated in the fibers, so that low density, A diaphragm with a large internal loss can be
obtained. Furthermore, although there are many cases where resin coating is performed on a
diaphragm that has been completed in the past, in the case of a transit diaphragm, there are
many gaps between fibers as described above. Penetrates into the interior, resulting in
substantial increase in the price of diaphragms. However, according to the present invention,
since the gaps between the fibers are small and the resin is difficult to penetrate into the interior
with the resin, resin coating is It can be said that it's the original 1 "ヲ ヲ lid + ル". Fig. 4 shows a
speaker (1 in the figure) having a swing plate 1 plate of 1 fj l according to the present invention
and a diameter '= A (like paper making after heating and pressing and making 9 bars (辰 1 j 1
plate The frequency% + i1 · of the speaker (in the figure (b)) is compared. The speaker's 1
"diameter is its Jlboom; boom, and the swing 11 伏 of (i) was transposed at a post-fabrication air
pressure of 6.5 K9 / cnf and then pressed at room temperature at a pressure of 500 V / oI.
Thereafter, it is dried for about 3 minutes in an air flow at a temperature of 120 ° C. to 130 °
C. at an air pressure of 6.5 K / aJ. In both cases, kraft pulp is used.
As apparent from the comparison, in the case of 500 llz or less, (i) has a peak, a small tip and a
small frequency response, and the IF is ill. Special V (200 Q 112 or higher J 2 II (: #,-the feature
is the most + 'a friend A 1, 1 B which proves the excellentness of the anti-Qll1 anti according to
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the present invention. A1, about 11 invention tsubocho, about f7r 一般 most commonly used "] I
described the method of making a paper with a paper making tank, but as it is clear from the
explanation" in duplicate, VC1 fingering " Workshop) Although it is a structural aspect of the
present invention, it is not a main part, so another papermaking method, for example, JP-B-29503. Even if the old rotary papermaking method disclosed in Japanese Examined Patent
Publication No. 52-11220 is 1'11, its effect can be obtained to light components.
4, Brief description of the drawings Fig. 1 is a cross-sectional view of a conventional papermaking tank, Fig. 2 d is a process diagram showing the manufacturing method of the present
invention, Fig. 3a, Fig. 3 is its old groove J1 transposition process FIG. 4 is a cross-sectional view,
and FIG. 4 is a frequency characteristic diagram of a speaker in which a diaphragm 1 according
to a conventional manufacturing method and a diaphragm according to the present invention ii'r
method are incorporated. Patent Assignee On Giyo-Stock Board Day 1 EndPage: 3 亮 2 亮 3 霞
bEndPage: 4
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