JP2005076816A - Damping plate, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive damping plate preventing deterioration of the environment by using granular rubber member formed by pulverizing waste tires as an elastic layer, incorporating it between two plate materials, and effectively using waste tires. <P>SOLUTION: The elastic layer is formed by mixing an adhesive and granular rubber members formed by pulverizing waste tires, and the elastic layer is formed between a plurality of plate materials by applying the elastic layer like a layer on a surface of the first plate material, laminating the second plate material on a surface of the elastic layer, and carrying out integral pressurized drying. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a vibration damping plate that absorbs sound and vibration and can be used effectively for waste tires that are used and discarded in automobiles and are mainly composed of rubber.

Conventionally, there is a damping plate in which a damping material such as rubber formed in a sheet shape is sandwiched between two plate materials such as wood plywood and steel plate (see, for example, Patent Document 1 and Patent Document 2), It is used as a damping material for automobile engines, engine room and cabin partitions, or floors and walls of rooms.
In addition, rubber tires used in a large number of passenger cars, buses, trucks, crane cars and other vehicles become unusable tires (hereinafter referred to as “waste tires”), and some of them are crushed and rubberized. Although it is used for recycling as a piece (for example, Patent Document 3), most of it is a huge amount of industrial waste in modern society.
Japanese Patent Laid-Open No. 6-340024 [pages 2 to 3, FIGS. 1 and 5] Japanese Patent Laid-Open No. 8-200490 [2nd page, FIG. 10] Japanese Patent Laid-Open No. 9-268588 [pages 7-8, FIG. 7]

By the way, a material in which a damping material (elastic material) such as a sheet-like rubber is sandwiched between two sheets as a damping plate has a special manufacturing process for forming a sheet-like rubber and requires large-scale equipment. It was difficult for small businesses to manufacture.
In addition, most of the tires are difficult to process, and some of them are left unattended and have an adverse effect on the environment. Moreover, even if the waste tire is formed into a sheet shape, there is a problem that the process is complicated and the equipment cost becomes enormous.
Moreover, although the technology which crushes a waste tire and uses the elastic material which consists of a rubber piece whose outer diameter is about 5-20 cm for a damping block is also disclosed, the thickness from such a rubber piece is, for example, 1- It is difficult to form a thin plate-like elastic layer of about 3 mm.
The present invention has been made in view of such circumstances, and a granular rubber member formed by pulverizing a waste tire is integrated as an elastic layer by sandwiching it between two plates, and the waste tire is effectively utilized to create an environment. The purpose is to provide a vibration control plate that is low in cost and prevents deterioration.

In the damping plate according to the first aspect of the present invention, an elastic layer made of a mixture of a granular rubber member and an adhesive formed by pulverizing a waste tire is formed between a plurality of plate members.
In the first invention, the granular rubber member may have an average particle size of 0.5 mm or more and less than 2 mm.
In the first invention, the elastic layer may have a weight ratio of the granular rubber member to the adhesive in a range of 2: 8 to 8: 2.

In the manufacturing method according to the second aspect of the present invention, a fluid elastic material is formed by mixing an adhesive and a granular rubber member formed by pulverizing a waste tire, and the fluid elastic material is used as the first material. It is applied in layers to the surface of the plate material, the second plate material is stacked on the surface of the layered fluid elastic material, and is integrally dried under pressure, and elastic between the first plate material and the second plate material. Form a layer.
According to a third aspect of the present invention, there is provided a vibration damping plate manufacturing method comprising: mixing an adhesive and a granular rubber member formed by pulverizing waste tires to form a fluid elastic material; The material is extruded into a plate shape by a melt extrusion device to cover the surface of the first plate material, and the second plate material is stacked on the surface of the fluid elastic material, and is pressed and dried integrally. An elastic layer is formed between the second plate member.

According to a fourth aspect of the present invention, there is provided a vibration damping plate manufacturing method comprising: forming a first rubber layer on a surface of a first plate member; and grinding a waste tire to form a granular rubber member. After the second adhesive layer is further formed on the surface of the layered granular rubber member, the second plate material is formed on the surface of the second adhesive layer. Are stacked and pressure-dried together to form an elastic layer between the first plate and the second plate.
In the second to fourth inventions, the adhesive may be an ethylene / vinyl acetate emulsion adhesive or a rubber emulsion adhesive.

For the vibration damping plate according to the first aspect of the present invention, a fluid elastic material in a state where a granular rubber member formed by pulverizing a waste tire between the first and second plate members and an adhesive is mixed is used. Since it is used, a vibration-damping plate can be formed at low cost without requiring a complicated manufacturing process for processing rubber into a sheet. Moreover, a homogeneous elastic layer can be formed by sufficiently mixing the granular rubber member and the adhesive.

Further, in the vibration damping plate of the first invention, when the average particle size of the granular rubber member is 0.5 mm or more and less than 2 mm, it does not scatter as dust during handling, and the thickness becomes too thick. It is possible to manufacture even thin objects.
Furthermore, in the vibration damping plate of the first invention, the elastic layer has a weight ratio of the granular rubber member and the adhesive in the range of 4: 6 to 6: 4. Therefore, the adhesive strength is not insufficient, and the ratio of the adhesive is too large, and the thickness of the rubber layer (elastic layer) becomes too thin so that the vibration damping function is not lost.
The weight ratio of the granular rubber member to the adhesive in the elastic layer is most preferably in the range of 4: 6 to 6: 4.

In the method for manufacturing the vibration damping plate according to the second invention, a fluid elastic material in which an adhesive and a granular rubber member are mixed is formed between the first plate material and the second plate material in a layered manner. Since the pressure drying is performed, the elastic layer can be firmly fixed to the first plate and the second plate.
About the manufacturing method of the damping board based on the said 3rd invention, the fluid elastic material which mixed the adhesive agent and the granular rubber member between the 1st board | plate material and the 2nd board | plate material is layered by the melt extrusion apparatus. Therefore, an elastic layer having a uniform thickness can be easily formed.

About the manufacturing method of the damping board based on the said 4th invention, after spraying a granular rubber member in layers on the adhesive apply | coated on the 1st board | plate material, and also apply | coating an adhesive agent on it Since the elastic layer is formed between the first plate member and the second plate member by pressurizing and drying from the outside of the first plate member and the second plate member, the equipment for forming the elastic layer is simplified, and the damping plate The manufacturing cost can be reduced.
In this case, as it is granular, it is sprinkled on the plate material to form a layer, so the waste tire can be crushed and stored in a granular form, and the handling amount can be easily determined as necessary. It is possible and the cost of manufacturing equipment can be extremely low.
In the second to fourth inventions, an organic solvent is not used as an adhesive, an ethylene / vinyl acetate emulsion adhesive in an emulsion state in which a solute is dispersed in water, or a rubber emulsion adhesive such as chloroprene or butyl. Because it is used, there is no toxicity that causes sick house syndrome and the like, and it is possible to provide a very safe vibration control plate even when used in public vehicles and houses. In addition, since an adhesive in an emulsion state is used, the viscosity of the adhesive can be freely selected, and the handling is easy and the profitability can be improved even in small-scale production.

Embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood.
FIG. 1 is a sectional view of the vibration damping plate according to the first embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are drawings for manufacturing the vibration damping plate according to the second embodiment of the present invention. FIG. 3 is an explanatory view showing a method, FIG. 3 is an explanatory view showing a method of manufacturing a vibration damping plate according to the third embodiment, and FIGS. 4A to 4E are views of the vibration damping plate according to the fourth embodiment. It is explanatory drawing which shows a manufacturing method.

As shown in FIG. 1, the damping plate 10 according to the first embodiment of the present invention has a layered structure between a first plate member 11 made of, for example, a wood plywood and a second plate member 12 made of the same material. An elastic layer 13 is formed.
The elastic layer 13 is made of a mixture of a granular granular rubber member 14 having a particle size of 0.5 mm or more and less than 2.0 mm, which is formed by mechanically pulverizing used waste tires, and an adhesive 15.
In addition, if the average particle diameter of the granular rubber member 14 is smaller than 0.5 mm, it will be scattered as a dust at the time of handling, and workability | operativity will be bad. On the other hand, if the particle diameter exceeds 2 mm, the thickness of the rubber layer (elastic layer 13) is increased, and it is difficult to form the thin damping plate 10.

If the weight ratio of the granular rubber member 14 and the adhesive 15 in the elastic layer 13 is larger than the ratio of the adhesive 15 than 2: 8, the thickness of the granular rubber member 14 becomes thin, and a sufficient damping function can be obtained. Absent. Further, if the weight ratio between the granular rubber member 14 and the adhesive 15 is 8: 2 and the weight ratio between the granular rubber member 14 and the adhesive 15 is greater than 2: 8, the adhesive strength is increased. In the worst case, delamination occurs, making it unusable. The optimum value of the weight ratio between the granular rubber member 14 and the adhesive 15 is in the range of 4: 6 to 6: 4.
The adhesive 15 uses an ethylene / vinyl acetate emulsion adhesive. Note that the adhesive has elasticity, and can be appropriately selected depending on the required characteristics depending on the method of use and the material of the plate.

Here, the manufacturing method of the damping plate 10 which concerns on the 2nd Embodiment of this invention is demonstrated with reference to FIG.1 and FIG.2.
(1) First, the waste tire is pulverized by a pulverizer such as a ball mill to prepare 1 kg of a granular rubber member 14 made of pulverized material that has passed through a 60-mesh sieve.
(2) Next, the 1st board | plate material 11 and the 2nd board | plate material 12 which consist of a plywood board | substrate of length 1m * width 2m * thickness 5.5mm are prepared, for example.
(3) Further, 2 kg of ethylene / vinyl acetate emulsion adhesive (for example, BA-300H, trade name; manufactured by Chuo Rika Co., Ltd.) is prepared as the adhesive 15.
(4) The liquid adhesive 15 and the granular rubber member 14 are put in a container 16 and well kneaded to form a fluid elastic material 13A. The viscosity at this time is preferably about 50 to 150 Pa · s / 30 ° C.

(5) As shown in FIG. 2 (a), the fluid elastic material 13A is flowed from the container 16 at a rate of 1000 g per 1 m ^{2 on} one surface of the first plate member 11, and using a trowel or a wire bar. Apply to a uniform thickness.
(6) The second plate member 12 is stacked on the applied fluid elastic member 13A, and the fluid elastic member 13A is sandwiched between the first plate member 11 and the second plate member 12.
(7) As shown in FIG. 2 (b), the first plate member 11, the second plate member 12 and the fluid elastic member 13A are pressed together (indicated by an arrow F) with a press 17; The adhesive 15 is dried at room temperature while being pressed. At this time, the fluid elastic material 13 </ b> A is dried to form the elastic layer 13. In addition, press pressure should just be the range of 1-10 kg / cm < ² >.
(8) Since the vibration damping plate 10 with the elastic layer 13 sandwiched between the first plate material 11 and the second plate material 12 is formed by the above steps, the vibration damping plate is lowered by reducing the pressure of the press machine 17. 10 is taken out.
It should be noted that the elastic layer 13 that protrudes around the pressure-control plate 10 for clamping by the press machine 17 may be cut off with a knife or the like.
Also, it is preferable to dry at normal temperature (15-25 ° C) for 1 to 3 days in a state of being clamped by a press machine 17, but after being dried at room temperature for about 24 hours in a state of pressing, the pressing is released. In this state, it may be left to dry at room temperature for 1 to 3 days.

A method of manufacturing the damping plate 10 according to the third embodiment of the present invention will be described with reference to FIG.
In this case, among the steps in the method of manufacturing the vibration damping plate 10 according to the second embodiment, the steps (1) to (4) and (6) to (8) are common, but (5 ), Instead of applying the fluid elastic material 13A with a trowel or the like, the plate-like fluid elastic material 13A is overlaid on the first plate material 11.
That is, in the step (5), the melt having the same length as the width of the first plate member 11 and the slit-like extrusion port 18 opened by the plate thickness of the required plate-like fluid elastic material 13A. An extrusion device 19 is prepared.
As shown in FIG. 3, the melt extruding device 19 extrudes the fluid elastic material 13 </ b> A in a molten state in which the granular rubber member 14 and the adhesive 15 are mixed in the container 16 from the extrusion port 18 in a plate shape. The plate material 11 is moved in the longitudinal direction (indicated by an arrow A in FIG. 3), and the plate-like fluid elastic material 13 </ b> A is overlaid on the first plate material 11.
After that, in the steps (6) to (8), the press plate 17 is pressed and dried, and the damping plate 10 is taken out.

A method for manufacturing the vibration damping plate 10 according to the fourth embodiment of the present invention will be described with reference to FIGS.
In this case, the steps (1) to (3) in the method for manufacturing the vibration damping plate 10 according to the second embodiment are common.
(4) As shown in FIG. 4A, the first adhesive layer 20 is formed by applying an adhesive 15 to one surface of the first plate 11.
(5) As shown in FIG. 4 (b), the granular rubber member 14 is dropped from the container 21 onto the first adhesive layer 20 applied to the first plate member 11, and the entire surface of the first plate member 11. The granular rubber member 14 is adhered to the first adhesive layer 20 by spraying so as to have a uniform thickness.
(6) As shown in FIG. 4C, the adhesive 15 is applied on the granular rubber member 14 to form the second adhesive layer 22.
(7) As shown in FIG. 4 (d), the second plate member 12 is overlaid on the adhesive 15 layer.

(8) As shown in FIG. 4 (e), the first plate member 11, the second plate member 12, the granular rubber member 14 and the adhesive 15 are pressed together by the press 17 (indicated by an arrow F). Then, the adhesive 15 is dried for 1 to 3 days at room temperature in a pressed state. At this time, the upper and lower adhesives 15 sandwiching the granular rubber member 14 by pressing penetrate into the particles of the granular rubber member 14 and form the elastic layer 13.
In addition, press pressure should just be the range of 1-10 kg / cm < ² >.
The adhesive 15 may be dried for 1 to 3 days after being pressed for 24 hours at room temperature and then released from pressure.
(9) The damping plate provided with the elastic layer 13 by mixing the granular rubber member 14 and the adhesive 15 between the first plate member 11 and the second plate member 12 in the pressed state by the above-described steps. 10 is formed.
(11) Lower the pressure of the press machine and take out the damping plate 10.
In the steps (4) and (6), the first plate material 11 and the granular rubber member 14 are covered with the first adhesive layer 20 and the second adhesive layer 22 using a semi-cured sheet-like adhesive. You may do it.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations described in the above embodiments, and may be considered within the scope of the matters described in the claims. The embodiment and modification examples are included.
For example, in the vibration damping plate according to the first embodiment, the example in which wood plywood is used as the first and second plate materials has been described. However, the invention is not limited to wood plywood, and metal plates such as plastic plates and steel plates. The material and thickness can be selected according to the purpose of use, such as an inorganic board such as a plaster board and a calcium silicate board.
Moreover, in the manufacturing method of the damping plate which concerns on 1st and 2nd embodiment, after forming one elastic layer on one surface of the 1st board | plate material, the example which piled up the 2nd board | plate material was demonstrated. However, the second plate material may be overlaid after the elastic layer is formed in multiple layers on the first plate material.
In addition, an elastic layer may be further provided on the surface of the second plate in a state where an elastic layer is provided between the first and second plates, and the third plate may be overlaid.

It is sectional drawing of the damping board which concerns on the 1st Embodiment of this invention. (a), (b), (c) is explanatory drawing which shows the manufacturing method of the damping board based on the 2nd Embodiment of this invention. It is explanatory drawing which shows the manufacturing method of the damping board which concerns on the 3rd Embodiment of this invention. It is explanatory drawing which shows the manufacturing method of the damping board which concerns on the 4th Embodiment of this invention.

Explanation of symbols

10: Damping plate, 11: First plate member, 12: Second plate member, 13: Elastic layer, 13A: Fluid elastic member, 14: Granular rubber member, 15: Adhesive, 16: Container, 17: Press 18: extrusion port, 19: melt extrusion device, 20: first adhesive layer, 21: container, 22: second adhesive layer

Claims (7)

A vibration damping plate, wherein an elastic layer made of a mixture of a granular rubber member and an adhesive formed by pulverizing a waste tire is formed between a plurality of plate members. 2. The vibration damping plate according to claim 1, wherein the granular rubber member has an average particle diameter of 0.5 mm or more and less than 2 mm. 3. The vibration damping plate according to claim 1, wherein the elastic layer has a weight ratio of the granular rubber member and the adhesive in a range of 2: 8 to 8: 2. . An adhesive and a granular rubber member formed by pulverizing a waste tire are mixed to form a fluid elastic material, and the fluid elastic material is applied to the surface of the first plate in a layered manner, and the layered fluid A damping plate comprising: a second elastic plate formed on the surface of the elastic elastic material; and a pressure-dried body integrally formed to form an elastic layer between the first elastic plate and the second elastic plate. Method. A fluid elastic material is formed by mixing an adhesive and a granular rubber member formed by pulverizing a waste tire, and the fluid elastic material is extruded into a plate shape by a melt extrusion device, and the surface of the first plate material. A second plate material is stacked on the surface of the fluid elastic material, and is integrally pressed and dried to form an elastic layer between the first plate material and the second plate material. Manufacturing method of damping plate. The first adhesive layer is formed on the surface of the first plate member, and the granular rubber member formed by pulverizing the waste tire is dispersed and adhered to the surface of the first adhesive layer. A second adhesive layer is further formed on the surface of the granular rubber member, and then a second plate material is stacked on the surface of the second adhesive layer and integrally dried under pressure, and the first plate material and the first An elastic layer is formed between the two plate members. The method for manufacturing a vibration damping plate according to any one of claims 4 to 6, wherein the adhesive is an ethylene / vinyl acetate emulsion adhesive or a rubber emulsion adhesive. Manufacturing method.

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