WO2003032684A1

WO2003032684A1 - Method of producing speaker diaphragm

Info

Publication number: WO2003032684A1
Application number: PCT/JP2002/010314
Authority: WO
Inventors: Kenichi Haba
Original assignee: Kenichi Haba
Priority date: 2001-10-05
Filing date: 2002-10-03
Publication date: 2003-04-17
Also published as: JP3517736B2; JP2003116199A; CN1559160A

Abstract

A method of producing multiple paper adapted for stabilized correlation combination while reducing the amounts of drain water and industrial waste from the papermaking process for a speaker diaphragm; and a material composition providing new sound quality. A papermaking technique is used in which paper stock (4) made in a primary papermaking process (a) is placed in a liquid containing a raw material (8) that is present in the secondary and following processes and the water is drained upwardly of a transfer form (6), while maintaining the state in which the paper stock is adsorbed by a secondary papermaking screen (5). And the paper is put together with the paper stock (4) from the primary papermaking process, thereby making paper of multiple construction as shown at (4) and (9) in (e). This diaphragm is of a construction having, on the front surface, a suitable material of high Young’s modulus and, on the back surface, a material suitable from the standpoint of internal loss and bending rigidity.

Description

Description Method for manufacturing diaphragm for speed force

The present invention relates to a method for manufacturing a diaphragm for speed force used in audio equipment. Background art

The papermaking in the conventional method of manufacturing a diaphragm for a speaker will be described with reference to FIG. 2 of the accompanying drawings.

A generally used papermaking method is as follows. A papermaking net 14 having a predetermined shape is arranged at the bottom of the making tank 13 of (g), and the raw material 15 is put into this tank. The papermaking process is used to drain the water from below and make paperwork 16. The paper made 16 is adsorbed to the transfer mold 17 of (i), taken out from the paper 14 and dried and formed.

In the case of press molding, this stock 16 is heated and placed at a predetermined temperature on the mold 18 and the convex 19 fitted with the wire mesh 20 of (j), and the paper 16 is transferred onto 20. And press-mold. Alternatively, in the case of non-press molding, 16 is adsorbed to the transfer mold 17 of (i), and hot air is blown onto this to perform dry molding.

The wastewater from this papermaking process exceeds the effluent standards set by the government because it contains impurities such as fibers, dyes and chemicals leaking from the mesh of the papermaking net. Therefore, wastewater discharged from the conventional manufacturing process must be purified.

Normally, the treated water is drained into general wastewater, and impurities such as fibers, dyes, and chemicals are stored individually as industrial waste, which is then discarded by specialists.

The above-mentioned purification equipment is operated by a responsible person in charge of inspection, reporting, and guidance from the governing body.However, due to global environmental issues, regulations on the disposal of industrial waste are subject to regulations. It is clear that this will be strengthened. Inevitable increase in costs. In addition, dumping industrial waste has the problem of directly contaminating the soil and putting a burden on the natural environment. To solve this, it is desirable not to generate wastewater containing waste from the manufacturing process.

Therefore, if wastewater is reused as papermaking raw material, water consumption and wastewater volume are reduced, but there is a drawback that the sound quality, weight, and appearance of the diaphragm may vary due to impurities in the wastewater. On the other hand, if the mesh of the papermaking net is made finer, the influence of impurities is reduced, but unevenness of the fabric due to clogging occurs, and stable production cannot be performed.

However, it is difficult to reuse the waste liquid with the conventional manufacturing method, and a new manufacturing method that solves this is required.

Further, since the conventional diaphragm has a single structure as shown in section 1a in FIG. 5, the selection range of materials is narrow, and it is not easy to produce a desired sound.

Therefore, the emergence of a multi-layered diaphragm that selects a material that is characterized by its acoustic properties such as Young's modulus, internal loss, and bending stiffness and separates the paper into paper is desired. Disclosure of the invention

In the production method of the present invention, the mass of the target diaphragm is divided, and the primary papermaking on the back side and the papermaking raw material after the secondary papermaking on the front side are separately performed, and the papermaking process is performed in the primary papermaking process. It is characterized in that a multi-layer diaphragm is manufactured by using the papermaking process as a part of a papermaking net and using a papermaking process in which the papermaking material is overlaid with secondary and subsequent papermaking raw materials. That is, the steps after the secondary papermaking are papermaking methods in which when papermaking raw materials pass through the stock of the primary papermaking, lapping is advanced so as to fill the gaps between the fibers.

In addition, since the raw material for primary papermaking is located on the back surface of the diaphragm, it does not affect the appearance of the speaker, and usually does not require dyeing.

A variety of material configurations can be selected for a diaphragm using this manufacturing method, since a multi-layer structure is formed on the front side with a material with high Young's modulus and a back side with a material with suitable internal loss and bending rigidity. Has features. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional view illustrating a process of the present invention.

FIG. 2 is a cross-sectional view showing a conventional general process. FIG. 3 is a sectional view of a two-layer structure diaphragm using the present invention. FIG. 4 is a cross-sectional view of a three-layer structure diaphragm using the present invention. FIG. 5 is a cross-sectional view of a diaphragm using a conventional manufacturing method. Explanation of reference numerals

(a), (g) Raw material input process

(b), primary papermaking process

(c), (i) Transfer process

(d), (e) Secondary papermaking process

(f), (j) Pressing process

(h), papermaking process

1, making tank 1

2 Primary papermaking net

3 Primary raw materials

4 Primary stock

5 Secondary paper net

6 Paper machine

7 Making tank 2

8 Secondary raw materials

9 Secondary stock

1 0, 1 8, concave mold

1 1, 1 9, convex mold

1 2, 2 0, wire mesh

1 3, making tank

1 4, Papermaking net 1-5, raw materials

1, 6

17 、 Transfer type

1 a, Cross section of conventional diaphragm

2 a, Cross section on the front side of the two-layer structure diaphragm

2b, Cross section on the back side of the two-layer structure diaphragm

3 a, Cross section on the front side of the three-layer structure diaphragm

3 b, Cross section of the center of the three-layer diaphragm

3c, cross section on the back side of the three-layer structure diaphragm Best mode for carrying out the invention

In order to describe the present invention in more detail, it will be described with reference to the attached drawing FIG.

In the raw material charging step (a), the primary papermaking net 2 is fixed to the papermaking tank 1, the primary raw material 3 is charged into the papermaking tank, and the primary papermaking step (b) is performed by draining from the bottom of the papermaking tank. Make the next stock 4. The paper table 6 to which the secondary paper net 5 is fixed is placed on top,

In the transfer step (c), the pressure drops 5 and 6 to adsorb 4 and then rises. This adsorption state is maintained until the step (e) is completed. In the secondary papermaking step (d), the paper is lowered into the liquid of the secondary raw material 8 in the papermaking tank 7 for a predetermined period of time, and then drained upward to perform papermaking. (E) indicates that the secondary stock 9 rose after completing the lamination on 4. Furthermore, if there is a third or subsequent papermaking, repeat the same steps (d) and (e) to perform upside down sizing. In (f), the paper stocks of 4 and 9 made by multiplex papermaking are transferred onto a wire mesh 12 fixed to the mold 10 and overlapped with the mold 11 to perform hot press molding. Alternatively, non-press molding is performed using warm air.

This papermaking process is performed according to the following specifications.

(1) The mass of the primary paper making on the back side is 30% or more.

(2) The mass after secondary paper making on the front side is 70% or less. When making paper with this specification, at least the following results are obtained.

(1) Waste liquid of primary papermaking can be reused for primary raw materials.

(2) Waste liquid after secondary papermaking can be reused for primary or secondary raw materials. The structure of this multi-sheet made diaphragm will be described with reference to the cross-sectional views of FIGS. Fig. 3 shows a two-layer structure diaphragm.The surface side cross section 2a is made of a material that has a characteristic of high Young's modulus, and dyes are used for paper pulp, Japanese paper, ceramic, carbon, mica, and other materials. It is a product to which a sizing agent, paper strength agent, etc. is added, and is effective for reproducing powerful, clear sound and clear sound quality.

The back side cross section 2b is made of a material that is characterized by internal loss and bending rigidity.It is made of paper such as paper pulp, Japanese paper, and synthetic fiber, plus additives such as sizing agent and paper strength agent. It is effective in reproducing sound quality with little distortion in the characteristics and a wide range in the low and middle ranges.

Fig. 4 shows a three-layered diaphragm with a central part added to Fig. 3.The central part cross section 3 is made of a material characterized by internal loss, and is sized for paper stock such as pulp, synthetic fiber, and hollow fiber. It has a three-layer structure with a front-side cross section 3a and a back-side cross section 3c.It has strong rigidity to withstand high output, and is effective in reproducing powerful bass with a spacious feeling. It is. Example

The following is an example using the manufacturing method of the present invention.

The effect of the present invention was evaluated by selecting a typical diameter 12 cm free edge type diaphragm, making the papermaking diameter, papermaking weight, mold and edge the same, and comparing the amount of wastewater and the amount of impurities. The specifications of the conventional manufacturing method are as follows: papermaking diameter: 95 mm, papermaking weight: 2 g, raw material concentration: 1 g, β, papermaking net: 50 mesh, ΚΡpulp (beating degree: 25), and black dye.

The papermaking waste liquid had a wastewater amount of 2ΰ and an impurity amount of 13 O mg.

(Example 1)

1. Primary papermaking: NB KP pulp (degree of beating 18), sizing agent, Raw material concentration 1 g / β, paper mesh 80 mesh,

2. Secondary papermaking: ΝΒΚΡ pulp (beating degree: 35), sizing agent, black dye, paper strength agent, raw material concentration: 2 g / fi, paper mesh: 60 mesh,

3. Papermaking weight: Primary papermaking weight 1.0 g,

Secondary paper making amount 1.O g, total 2.0 g,

4. Primary effluent: Wastewater amount is about 1.0β, amount of impurities 35 mg

5. Secondary effluent: Wastewater volume is about 0.5 β, amount of impurities 14 mg

As a result, the primary waste liquid has no dye and contains little chemicals, so it is reused for primary raw materials and the secondary waste liquid is purified. As a result, the amount of waste liquid was reduced by 75% and the amount of impurities was reduced by 89.2%.

(Example 2)

1. Primary papermaking: NB K P pulp (degree of beating 18), sizing agent,

Paper strength agent, raw material concentration 0.5 g / β, paper mesh 80 mesh,

2. Secondary paper: ΚΡ ΝΒ pulp (beating degree 35) 50%, sizing agent, rayon (5 mm long) 50%,

Raw material concentration 2 g / β, paper mesh 60 mesh,

3. Tertiary papermaking: Manila hemp (degree of beating 40), blue dye, sizing agent,

Raw material concentration 5 g / β,

4. Papermaking weight: Primary papermaking amount 0 Dg,

Secondary papermaking amount 0 8 g,

Tertiary papermaking amount 0 6 g, total 2.0 g,

5. Primary effluent: The amount of wastewater is about 12 β, the amount of impurities is 21 mg,

6. Secondary effluent: amount of wastewater is approximately 0 4 β, amount of impurities 11.2 mg,

7. Tertiary wastewater: Wastewater volume is about 0 1 2β (mixed with secondary wastewater),

As a result, the primary waste liquid has no dye and contains little chemicals, so it is reused for the primary raw material, and the waste liquid mixed with the secondary waste liquid and the tertiary waste liquid is reused for the secondary raw material because the amount of impurities is small. 0.12β is purified. The result was 94% wastewater, A 97.4% reduction in the amount of impurities was obtained.

Comparing the sound quality of the speaker using the conventional diaphragm with the diaphragms of (Example 1) and (Example 2), the Example has features of strong, good sound missing, and bright sound quality. Industrial applicability

As described above, in the diaphragm manufacturing method of the present invention, since the paper material first formed in the multiple papermaking plays a role of filter paper, impurities in the waste liquid after the secondary papermaking are reduced, and the primary paper on the back side is reduced. Wastewater can be reused as a raw material for papermaking because there is no need for dyeing. As a result, the amount of purified wastewater can be reduced by more than 75% and the amount of industrial waste can be reduced by more than 89%, saving on costs such as purification costs, water supply costs, dyestuff costs, material costs, and the environment. The load can be reduced.

In addition, by selecting a material with high Young's modulus on the front side and a material with internal loss and bending stiffness on the back side, we can propose new sound quality.

Claims

The scope of the claims

1. It has at least a plurality of papermaking processes, and uses the paper stock made in the primary papermaking process to maintain the state of being adsorbed on the secondary papermaking net, and in the secondary and subsequent papermaking processes. A method for producing a diaphragm for speedy power, characterized in that it is placed in a liquid of a certain raw material, and then sewn upward while being sewn and overlapped with the stock of primary papermaking to make multiple papermaking.

2. A loudspeaker diaphragm having a multi-layer structure in which two or more layers are overlapped using the manufacturing method of the present invention.