JP2551225Y2 - Diaphragm paper machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a diaphragm papermaking apparatus for making a paper pulp diaphragm for a speaker.

[Prior Art] Conventionally, a papermaking apparatus for a paper pulp diaphragm includes a dropping type as shown in FIG. 3 and an automatic papermaking apparatus in which a table is not rotated as shown in FIG. In FIG. 3, reference numeral 11 denotes a pulp liquid tank, and 12 denotes a sheeting tank into which a pulp liquid 13 is dropped and supplied from the pulp liquid tank 11 via a pulp liquid supply valve 17,
A perforated paper net 14 is inserted and arranged in the paper making tank 12, and a water supply / drain pipe 16 connected to a lower part of the paper making tank 12 is provided.
Then, the paper is drawn through the paper-making net 14 to make paper, so that the corn pulp 15 can be obtained.
Further, by supplying water from the water supply / drain pipe 16, the concentration of the pulp liquid can be controlled. In the figure, 18 is a water supply valve, 19
Is a drain valve.

In FIG. 4, the pulp liquid tank 21 and the bottom of the papermaking tank 22 are communicated with each other by a pulp liquid supply pipe 27, and the discharged pulp is discharged from the bottom of the papermaking tank 22 by a pump 30 through a drainage pipe 28. Water is returned to the pulp liquid tank 21. Making tank 22
Inside, a hollow paper machine 24 punched on the papermaking surface is arranged, and a movable pipe shaft below the machine 24 is a drain pipe.
It is inserted into 26 and is raised and lowered by a hydraulic device (not shown).

Therefore, the pulp is deposited on the paper surface punched by automatic suction by raising the paper making table 24 in the pulp liquid 23, and excess water is drained by draining with the drain valve 29 to obtain corn pulp 25. It is supposed to be.

[Problem to be Solved by the Invention] According to the dropping type apparatus shown in FIG. 3, the pulp liquid 13 in the paper making tank 12 is made in a state of being stirred, so that the formed diaphragm has uneven paper making. It has excellent physical properties such that the pulp fiber arrangement in the normal direction and circumferential direction is well balanced, and the range of physical properties (sound speed and tan δ) in the normal direction and circumferential direction is wide. However, there is a drawback that it takes.

On the other hand, the automatic papermaking machine shown in FIG. 4 which does not rotate the table is relatively inexpensive and is used in many cases.
The physical properties are controlled only by the pulp solution concentration, the suction speed and the suction force in 22 and the range of the obtained properties is narrow because the range is narrow.

Further, there is a drawback that unevenness in papermaking (thickness unevenness), paper wrinkles and the like are easily generated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a diaphragm papermaking apparatus which can obtain a paper diaphragm which is inexpensive, has a wide range of physical properties, and has a small thickness unevenness.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, in an automatic paper making apparatus in which a making table does not rotate, a liquid supply for supplying a pulp solution from a pulp solution tank to a making tank is provided. A channel is provided at the upper part of the papermaking tank, a water flow rotating device is provided for giving a water flow rotation to the pulp liquid in the papermaking tank, and an auxiliary cylinder is provided on the outer periphery of the papermaking table.

A simple configuration of the water flow rotating device is composed of a compressor and an air pressure feeding hose, and the air pressure feeding hose is arranged so as to open into the pulp liquid in the paper making tank. Further, a large number of small holes may be provided in the holding cylinder.

[Operation] The pulp liquid in the pulp liquid tank is supplied to the upper part of the paper making tank, and the pulp liquid in the paper making tank forms a water flow that rotates in the paper making tank by a water flow rotating device. In this state, there is still some unevenness in papermaking, but an auxiliary cylinder is provided on the outer periphery of the papermaking table. When the papermaking table rises, the pulp liquid in the auxiliary cylinder becomes a spiral water flow, Since the pulp is laminated on the papermaking surface of the paperboard by automatic suction accompanying the rise of the paperboard, the papermaking is performed without unevenness, and the arrangement of pulp fibers in the normal direction and circumferential direction is balanced. Becomes

[Embodiment] An embodiment of the present invention will be described with reference to FIG. 1 and FIG.

FIG. 1 is a cross-sectional view schematically showing the entire apparatus, FIG. 2 is a perspective view of an auxiliary cylinder, and in FIG.
Reference numeral 2 denotes a papermaking tank, 3 denotes a pulp liquid, 4 denotes a papermaking table, and 26 denotes a drain pipe. These structures are the same as those of the automatic papermaking apparatus in which the papermaking table does not rotate as described in FIG.

In the present invention, a liquid supply path 7 for supplying the pulp liquid 3 from the pulp liquid tank 1 to the paper making tank 2 is provided above the paper making tank 2 and the pulp liquid 3 in the paper making tank 2 is rotated by a water flow. In the meantime, a water flow rotating device 6 is provided to provide the water supply, while an auxiliary cylinder 9 is provided on the outer peripheral portion of the machine 4.

In the embodiment, the water flow rotating device 6 is constituted by a compressor 10 and an air pressure feeding hose 8, and the air pressure feeding hose 8 is connected to the papermaking tank 2.
The pulp liquid 3 is arranged so as to open. The water flow rotating device 6 may be, for example, a motor-driven hydrofoil. The holding cylinder 9 may be provided with a number of small holes 9a as shown in FIG.

When the pulp liquid 3 is supplied from the pulp liquid tank 1 to the upper part of the paper making tank 2 through the liquid supply path 7 and air is fed by the compressor 10 through the air supply hose 8, the pulp in the paper making tank 2 The liquid 3 generates a water flow rotating in the tank.

In this state, there is still some unevenness in the paper making. However, since an auxiliary cylinder 9 made of brass having a thickness of about 1 mm is attached to the outer periphery of the ski base 4 and the surrounding wall is provided, the paper making base 4 is When raised by a hydraulic device or the like (not shown), the pulp liquid 3 in the auxiliary cylinder 9 becomes a spiral water flow, and the pulp is punched into the pulp 4 by being automatically sucked as the pudding 4 rises. Drainage pipe piled up on the papermaking surface
Excess water is drained by draining through 26, and corn pulp 5 is obtained. Since the corn pulp 5 thus produced is produced in a state where the pulp liquid does not overflow and is stirred, the physical properties of the corn pulp produced by the dropping paper machine shown in FIG. Become.

When the pulp was made at a shallow beating degree (Canadian freeness of 550 cc) using the above-mentioned diaphragm paper making machine, the physical properties of the vibrating lead were 2,200 m / s in normal direction and tan δ = 0.06.
In the circumferential direction, the sound velocity was 2,100 m / s, tan δ = 0.07, and a well-balanced value was obtained.

Deep beating degree (Canadian freeness 300cc)
Even when pulp is made, the physical properties of the vibrating reed are that the sound speed is 2,900 m / s in the normal direction, tan δ = 0.04, and the sound speed in the circumferential direction.
It was 2,800 m / s and tan δ = 0.05, and it was confirmed that the physical properties in the normal direction and the circumferential direction were well balanced. In addition, there was little unevenness in paper making and the thickness was uniform.

By providing the small holes 9a in the auxiliary cylinder 9 as in the embodiment, the applicable range of the physical properties can be expanded.

[Effects of the Invention] According to the diaphragm papermaking apparatus according to the present invention, it is possible to obtain a paper diaphragm that is inexpensive, has a good arrangement of pulp fibers in the normal direction and the circumferential direction, and has a good balance of physical properties. it can.

In addition, it is possible to obtain a diaphragm having less unevenness in thickness and a uniform thickness, and to provide a small hole in the auxiliary cylinder to expand the range of physical properties, thereby greatly expanding the applicable range of sound quality. is there.

[Brief description of the drawings]

1 and 2 show an embodiment of a diaphragm papermaking apparatus according to the present invention. FIG. 1 is a cross-sectional view schematically showing the whole, and FIG. 2 is a perspective view of an auxiliary cylinder. FIG. 3 is a cross-sectional view showing a conventional dropping type papermaking apparatus, and FIG. 4 is a cross-sectional view showing a conventional automatic papermaking apparatus in which a papermaking table does not rotate. 1: Pulp liquid tank, 2: Paper making tank, 3: Pulp liquid 4: Paper making table, 5: Corn pulp 6: Water flow rotating device, 7: Liquid supply path 8: Air pressure hose, 9: Auxiliary cylinder, 9a: Small hole 10: compressor

Claims (3)

(57) [Scope of request for utility model registration] In an automatic papermaking machine in which a papermaking table does not rotate, a liquid supply passage for supplying a pulp liquid from a pulp liquid tank to a papermaking tank is provided at an upper part of the papermaking tank, and a pulp in the papermaking tank is provided. A diaphragm papermaking apparatus, comprising: a water flow rotation device for imparting a water flow rotation to a liquid; and an auxiliary cylinder provided on an outer peripheral portion of the table. 2. A diaphragm papermaking apparatus according to claim 1, wherein the water flow rotating device comprises a compressor and an air pressure feeding hose, and the air pressure feeding hose is opened in the pulp liquid in the paper making tank. 3. The diaphragm papermaking apparatus according to claim 1, wherein the holding cylinder is provided with a number of small holes.