JP4443785B2 - Buffer cushioning material for speaker, method and apparatus for manufacturing the same, and structure for holding buffer waterproof material for speaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides, for example, a shock-proof waterproof material 1 having a function of interposing between the outer peripheral edge 8 of the frame 7 of the speaker 5 and the mounting plate 9 of the speaker 5 so as to retain buffering and airtightness therebetween. The present invention relates to a manufacturing method and a manufacturing apparatus, and a structure for holding the speaker waterproofing material 1 for a speaker on a speaker frame 7.
[0002]
[Prior art]
In the case of the conventional speaker 5, the shock-proof waterproof material 1 a having the above-described function is an intermediary called a gasket formed in a ring shape having elasticity, and mainly an outer peripheral edge 8 of the frame 7 as shown in FIG. 12. Affixed to the surface facing the mounting plate 9, the speaker 5 is mounted on the mounting plate 9 via the cushioning waterproofing material 1a, the space before and after the speaker 5 is blocked to prevent mutual interference of sound waves, and the vibration of the speaker 5 is mounted. It acts on the plate 9 so as not to adversely affect each other. In the case of FIG. 12, the speaker 5 is attached to the back surface of the mounting plate 9, and thus the shock-proof waterproof material 1 a is provided on the front surface of the outer peripheral edge portion 8 of the frame 7. The conventional shock-proof waterproof material 1a is formed by molding a rubber, rubber or resin foam into a predetermined ring shape or a sheet shape when the above-described shock-absorbing property and sealing property (particularly water-tightness) are required. Then, the material punched into a ring shape is used by adhering to a predetermined position of the speaker frame 7 with an adhesive, a double-sided adhesive tape or the like. In general, the cushioning waterproofing material 1a made of a foam is used as a main component, melts a thermoplastic resin containing SBS as a main component and terpenephenol or an aromatic hydrocarbon resin, and mixes an inert gas under pressure. Then, the foamed resin is applied.
[0003]
[Problems to be solved by the invention]
The conventional waterproofing waterproof material 1a has a tackiness (adhesiveness) remaining on the surface. For example, when the speaker 5 is attached to a mounting plate or a vehicle body, the outer peripheral edge of the frame 7 is only touched to the surface. It is easy to peel off from the surface of the portion 8, and it is difficult to adjust the position when the speaker 5 is attached. Moreover, dust adheres and is caught between contact surfaces with other objects such as a mounting plate, and tends to hinder watertightness. Further, the heat resistance is low, and a compression set is generated by a thermal shock of about 100 ° C., the adhesion to an object is deteriorated and water leakage may occur. Furthermore, it is weak in chemical resistance, especially susceptible to being attacked by wax removers and oil-based solvents, and its function is lost due to deterioration, and the resilience (restorability) of the material after undergoing deformation such as compression is lacking. There was a fault that the water stop performance was weak due to the fault. In addition, it takes time to cure and has a problem to be solved that productivity is low.
[0004]
Therefore, the present invention adopts a means for mechanically mixing the gas as a foaming means for the resin in order to solve the problems of the conventional buffer waterproof material 1a of this type. In addition to obtaining physical properties and chemically stable functionality, it is possible to reduce the temperature fluctuation range of the heat curing means by using a raw material resin that exhibits a critical curing state with respect to the curing critical temperature when curing the foamed resin. Reduces the time required for foam curing at the time of molding, increases productivity, eliminates material loss, allows wide adjustment of foaming magnification with high accuracy, is simple in equipment, has excellent maintainability, and is buffered and waterproof An object of the present invention is to provide a low-cost cushioning waterproofing material 1 that is excellent in vibration characteristics, waterproofness, and recyclability as a material, and does not retain surface tackiness (adhesiveness).
[0005]
[Means for Solving the Problems]
The structure of the present invention for achieving the object will be described with reference to FIGS. 1 to 8 corresponding to the embodiment. The first invention is a structure between the outer peripheral edge 8 of the frame 7 of the speaker 5 and the mounting plate 9. A buffer waterproofing material 1 interposed between the two to maintain shock buffering property and sealing property, and a thermosetting composition mainly composed of a latent curing agent in which a polyurethane prepolymer and a solid polyamine are inactivated. The foamable thermosetting composition 12 obtained by mechanically mixing the gas 11 with the product 10 is applied to a predetermined position of the outer peripheral edge 8 of the frame 7 to be applied in a state below the thermosetting critical temperature. Then, the foamed thermosetting composition 12 is heated to a temperature equal to or higher than the thermosetting critical temperature of the foamable thermosetting composition 12, and the foamed and waterproofed foam is foam-cured and cured into a predetermined shape in the range of the diameter of the internal bubbles in the range of approximately 1 to 100 microns. This is material 1.
[0006]
In the second invention, a gas 11 is mechanically mixed with a thermosetting composition 10 mainly composed of a latent curing agent obtained by inactivating a polyurethane prepolymer and a solid polyamine, and the outer peripheral edge 8 of the frame 7 is mixed. In the manufacturing method of the shock-proof waterproof material that is thermally cured while being discharged and foamed at a predetermined position, the foamable thermosetting composition 12 is placed at a predetermined position on the outer peripheral edge 8 of the frame 7 in a state of less than the thermosetting critical temperature. A buffer that is applied by discharge and heated to a temperature equal to or higher than the thermosetting critical temperature while foaming the foamable thermosetting composition 12 by the molding apparatus 50 to foam and cure the foam within the diameter range of approximately 1 to 100 microns. This is a manufacturing method of the waterproof material 1.
[0007]
In the third invention, a supply device 20 for sucking the gas 11 and injecting the thermosetting composition 10 into the gas 11 and a mixing device 30 for mechanically mixing and dispersing the gas 11 and the thermosetting composition 10 are provided. A raw material discharge device 40 that pressurizes and discharges the foamed thermosetting composition 12 mixed and dispersed to a predetermined position on the outer peripheral edge 8 on the frame 7 where the buffer waterproof material 1 is to be formed; Molding in which the foamable thermosetting composition 12 is heated to a temperature equal to or higher than the thermosetting critical temperature at a predetermined position on the outer peripheral edge 8, and the diameter of the internal bubbles is foamed and cured within a range of approximately 1 to 100 microns. This is a manufacturing apparatus for the shock-proof waterproof material 1 including the device 50.
[0008]
The fourth invention is the shock-proof waterproof material 1 according to the first invention, characterized in that the bubbles inside the shock-proof waterproof material 1 consist of closed cells alone or both closed and open cells. A fifth invention is the shock-proof waterproof material 1 according to the first invention, wherein the skin layer on the surface is integrally formed without defining a clear interface with the inner foam layer. 6th invention is the buffer waterproofing material 1 of 1st invention characterized by being in the range of 0.15-0.9 g / cm < ³ >. A seventh invention is the shock-proof waterproof material 1 according to the first invention , wherein the speaker frame 7 is another object.
[0009]
In the eighth aspect of the present invention, when the foamable thermosetting composition 12 is applied, the recessed portion 56 is formed in the entire range or a partial range of the application position of the outer peripheral edge portion 8 of the frame 7. It is a structure for holding the shock-proof waterproof material 1 according to the first invention, wherein a part of the curable composition 12 is hardened in a state where it enters and fills the inside of the recessed portion 56. In the ninth aspect of the invention, the applied foamable thermosetting composition 12 is indirectly heated to the thermosetting critical temperature or higher by heating the frame 7 by an electromagnetic induction heating method in the molding apparatus 50. It is a manufacturing method of the shock-proof waterproof material 1 of 2nd invention characterized by the above-mentioned. The tenth aspect of the invention is characterized in that the foamable thermosetting composition 12 applied is heated to a temperature equal to or higher than the thermosetting critical temperature by a high frequency dielectric heating method in the molding apparatus 50. This is a manufacturing method of the buffer waterproof material 1. The first 1 invention, the coating has been and foamable thermosetting composition 12, second invention characterized by being heated in the thermosetting critical temperature or more by irradiating infrared rays at the molding device 50 This is a method for manufacturing the shock-proof waterproof material 1.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, various embodiments of the above-described solving means will be described with reference to the drawings. Detailed implementation points regarding the examples of the thermosetting composition 10 which is the main material of the shock-proof waterproof material 1 of the present invention and the modified examples thereof are disclosed in Japanese Patent Laid-Open No. 2000-117090 disclosed by the same inventor as the present application. However, if the main point is described, the polyisocyanate compound and the urethane prepolymer containing a terminal active isocyanate group obtained by reacting an excess amount of the polyisocyanate compound with the polyol component alone or a mixture and the solid polyamine are inactivated. As a latent curing agent, a fine powder-coated polyamine coated with an active amino group by fixing a fine powder with a center particle size of 2 microns on the surface of a solid polyamine powder having a melting point of 50 ° C. or more and a center particle size of about 20 microns is heated. Used after blending so that the equivalent ratio of the activated amino group and isocyanate group is 1 / 0.5 to 2.0. That.
[0011]
The fine powder used for the fine powder coating polyamine is an inorganic material that is physically equivalent to talc, titanium oxide, calcium carbonate, etc., and the organic material is polyacrylic resin, polystyrene resin, polyethylene resin, polyvinyl chloride resin. Etc. are employed, and one or a mixture of two or more thereof is used. The amount of solid polyamine powder / fine powder used is about 1 / 0.001 to 0.5 by weight. It is produced by a shear friction mixing method in which a fine powder material is mixed and pulverized while the solid polyamine is pulverized to a predetermined particle size, and the fine powder is fixed to the surface of the solid polyamine. Specifically, a restraint impact type mixing stirrer or a compression shear type mixing stirrer is used.
[0012]
The thermosetting composition 10 obtained as described above has a critical curing characteristic with respect to temperature, and does not cure below 60 ° C., but curing is almost completed at 80 ° C. Accordingly, it is possible to reduce the temperature range of the cooling and heating cycle of the mold at the time of molding, and at the same time to shorten the cycle period, which contributes to productivity improvement. Next, a gas 11 as a foaming agent is stirred and mixed in the thermosetting composition 10 and mechanically mixed to obtain a foamable thermosetting composition 12. Although air is used as the gas 11 in the first embodiment, it goes without saying that other equivalent gases may be used. The technique of mechanically mixing the thermosetting composition 10 and the gas 11 as the foaming agent is described in detail in JP-A-11-128709 disclosed by the same inventor as the present application.
[0013]
FIG. 1 is a circuit system diagram showing a configuration of a manufacturing apparatus belonging to the third invention for the purpose of carrying out the manufacturing method of the shock-proof waterproof material 1 belonging to the second invention. First, the gas 11 and the thermosetting composition 10 are mixed from the supply device 20 by the piston pump 31 of the mixing device 30. The piston pump 31 sucks the foaming gas 11 through the cylinder 32 and the piston 33, and then injects the thermosetting composition 10 mainly composed of the latent curing agent inactivated with the polyurethane prepolymer and the solid polyamine. Press to mix mechanically. The mixed foamable thermosetting composition 12 is pressure-fed by a piston pump 41 of the raw material discharge device 40 to a molding device 50 including an object to be coated such as the frame 7 and an application table 55.
[0014]
In the molding apparatus 50, the frame 7 or the like is set on the coating table 55, and the foamable thermosetting composition 12 that is pumped by the piston pump 41 passes from the nozzle 42 of the raw material discharge apparatus 40 to the outer peripheral edge portion of the frame 7. 8 is applied to a predetermined position. At this time, the frame 7 is maintained at a temperature lower than the thermosetting critical temperature of the foamable thermosetting composition 12 (about 60 ° C. or less), and thus continues to foam without being cured. After the application, the frame 7 is heated or the foamable thermosetting composition 12 is directly heated to be higher than the thermosetting critical temperature, and is cured to a predetermined shape in about 10 seconds. The pumps of the mixing device 30 and the raw material discharge device 40 may be any type of pump, but the piston pumps 31 and 41 of the embodiment are volume operation types in which the piston reciprocates in the cylinder to perform the suction process and the discharge process. It is suitable for pumping raw materials, has the features of accurate supply and good reproducibility. In addition, the piston pump can smoothly feed the raw material by driving not only one unit but also a plurality of units in parallel while shifting the phase.
[0015]
As a means for heating the frame 7, when the frame 7 is made of metal, the frame 7 may be heated by an electromagnetic induction heating method, or may be heated by a high frequency dielectric heating method in which a coated raw material is irradiated with a microwave, or simply May be irradiated with infrared rays. Since the curing time is short, the electromagnetic heating coil 54, the microwave antenna 53, the infrared lamp, etc. are incorporated in the production line of the speaker 5 with the irradiation heating device described above, and the cycle is synchronized with other processes as one process in the assembly process. You can also. In an actual manufacturing facility, a large number of such manufacturing apparatuses are installed in parallel and driven in parallel to contribute to the improvement of productivity. The shock-proof waterproof material 1 manufactured as described above and the outer peripheral edge 8 of the frame 7 have an adhesive force or adhesive force to the base body that does not interfere with practical use, but a stronger adhesive force is required. In this case, the application surface of the foamable thermosetting composition 12 is roughened or, for example, a concave portion 56 similar to a groove is formed in the outer peripheral edge portion 8 of the frame 7, and the concave portion 56 is formed inside the concave portion 56. What is necessary is just to set it as the structure which has become the state which a part of foamable thermosetting composition 12 penetrate | invaded and filled.
[0016]
The bubbles inside the shock-proof waterproof material 1 manufactured by the manufacturing method and the manufacturing apparatus are mainly composed of closed cells. However, when the foaming degree is large, a state where both closed cells and open cells coexist appears. The density of the waterproofing material 1 after manufacture is suitably in the range of 0.15 to 0.9 g / cm ³ in order to maintain the shock-absorbing property and water-tightness of the waterproofing material 1 and is mixed mechanically. Since the bubbles are generated by the gas, the dispersion of the internal bubbles is small with respect to the center value, the structure seen macroscopically is uniform, the contact property with the corresponding object a or object b is good, and particularly watertight It contributes to the improvement. It is desirable from the sustain and elasticity stability standpoint of closed cell center value of the diameter of the interior of the bubble is in the range of approximately 1 to 100 microns. Further, the skin layer on the surface may be thin and formed integrally with the inner foam layer without a clear interface. In the embodiment of the present invention, description has been made on the premise that the object is applied to the frame 7. However, the object to be applied may be another object, for example, may be applied to a fitting portion of a speaker box. In this case, the buffer waterproof material 1 with high water-tightness can reduce defects due to air leakage without leaking air inside the box to the outside, and can improve productivity and quality.
[0017]
The manufacturing method and the manufacturing apparatus of the shock-proof waterproof material 1 of the present invention have a structure in which a gas that becomes a foaming agent is mechanically mixed and foamed immediately before molding into a thermosetting composition. There is no material loss (referred to as purge loss) because it is not necessary to mix the foaming agent. Since the foaming gas is mechanically mixed and foamed, most of the tissue becomes closed cells, and open cell portions are not generated or very few, so that the mechanical strength, physical properties and water tightness are excellent. Further, since the structure is close to homogeneity when viewed macroscopically, it is excellent in cushioning between the outer peripheral edge 8 of the frame 7 and the mounting plate 9 as a buffer waterproofing material.
[0018]
Since the thermosetting composition as a raw material has a critical thermosetting critical temperature, the temperature difference between applying and curing the object to be coated is small, and the time between heating and cooling near the critical temperature is short. Therefore, the production cycle can be shortened, and combined with rapid (immediate) curing at the above critical temperature, it is excellent in productivity. Further, since the thermosetting composition and the gas are mixed by a piston pump, the mixing accuracy is good, the foaming ratio can be easily adjusted, the reproducibility of physical properties as a product is good, and the quality is stable. In the embodiment of the present invention, description has been made on the premise that the object is applied to the frame 7. However, the object to be applied may be another object, for example, may be applied to a fitting portion of a speaker box. In this case, the highly waterproof water-proof cushioning material 1 does not leak air inside the box to the outside, can reduce defects due to air leakage, and can improve productivity and quality.
[0019]
【Example】
A first embodiment will be described. 79.3 parts by weight of a polyether polyol having an average molecular weight of 2000 and 20.7 parts by weight of diphenylmethane diisocyanate were reacted at a temperature of 80 ° C. for 2 hours to give a terminal isocyanate group content of 3.5% and a viscosity of 2000 cps / 20 ° C. A urethane prepolymer containing terminally active isocyanate groups is obtained. Further, 83.3 parts by weight of 1,12-dodecanediamine (melting point 71 ° C.) having a center particle size of about 2 mm and 16.7 parts by weight of a fine powder of polyvinyl chloride resin having a center particle size of 0.3 microns are mixed, and jetted. By grinding with a mill, 100 parts by weight of finely powder coated polyamine having a center particle size of about 10 microns is obtained. Next, 90.9 parts by weight of urethane prepolymer containing terminal active isocyanate groups and 9.1 parts by weight of fine powder-coated polyamine are mixed and dispersed with a chemistor, and a one-component liquid having a thermosetting critical temperature of about 80 ° C. A mold thermosetting composition 10 is obtained.
[0020]
A gas 11 as a foaming agent, that is, air, is mixed with the one-component thermosetting composition 10 and mechanically mixed to obtain a foamable thermosetting composition 12, and the foamable thermosetting composition is obtained. The composition 12 is pumped to the molding device 50, and the speaker frame 7 is rotated around the outer peripheral edge 8 of the speaker frame 7 having a cross-sectional shape shown in FIG. The nozzle 42 of the discharge device 40 is injected and applied in a ring shape, and the microwave is radiated from the microwave antenna 53 above the frame 7 to perform dielectric heating, and the foam is cured by heating above the thermosetting critical temperature. A buffer waterproof material 1 was obtained.
[0021]
FIG. 4 shows the molding method of the second embodiment. In the second embodiment, the foamable thermosetting composition 12 is pumped to the molding apparatus 50 as in the first embodiment, and the temperature is about 60 ° C. or less in the cross-sectional shape shown in FIG. The outer peripheral edge 8 of the speaker frame 7 is spray-coated in a ring shape from the nozzle 42 of the discharge device 40 while rotating the speaker frame 7, and an alternating current is passed through the electromagnetic induction coil 54 installed above the frame to electromagnetically In this method, the frame 7 is heated by an induction heating method, and the foamable thermosetting composition 12 is indirectly heated to the thermosetting critical temperature or higher. This method has a feature that dangerous electromagnetic waves do not leak to the surroundings.
[0022]
FIG. 5 shows temperature characteristics of physical properties such as Young's modulus and tan δ of the buffer waterproof material according to the first embodiment. Compared to an example of a conventional foam cushioning waterproofing material that is premixed with a main raw material resin, a curing agent, and a foaming agent (= conventional example ... filled with a dotted line, the same applies to FIG. 6), the variation in physical property values is small. The temperature characteristics are clearly improved. FIG. 6 also shows the breaking characteristics with respect to the external force of the buffer waterproof material at −40 ° C. for the first embodiment. Similarly, it is clear that the breaking strength at a low temperature (−40 ° C. in FIG. 6) becomes stronger and the mechanical strength is improved as compared with the conventional example . That is, it is clear that there is no change in physical properties at low temperatures and the improvement is achieved. FIG. 7 shows the bubble diameter distribution of the buffer waterproof material of the first embodiment. Compared to the bubble particle size of the conventional example of FIG. 8, the cushioning waterproof material 1 of the present invention is more uniform. Further, FIG. 9 and FIG. 10 show the foamed states of the buffer waterproof material 1 of the first embodiment and the conventional buffer waterproof material 1a. Further, for the shock-proof waterproof material 1 according to the first embodiment, a test piece t of the same material was made and the water tightness was measured by the U-shaped groove water filling test shown in FIG. In this test, as shown schematically in the drawing, an elongated test piece t having a rectangular cross section is bent and sandwiched between two plates 61, 61 made of acrylic resin plates, and a screw 62, a spacer 63, Compress appropriately. Then, the space surrounded by the U-shaped test piece t and the two acrylic resin plates 61, 61 is filled with water 64, and the presence or absence of water leaking outside the U-shaped test piece t is detected. Measure the compression rate that is blocked. As a result of this test, it was necessary to compress the foam of the conventional example by about 50% to 80%, but the foam of the first example obtained a complete water tightness with a compression ratio of about 10%.
[0023]
Although the embodiments and modifications considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. The invention includes the above-described constituent requirements of the present invention, such as modification of the forming apparatus, and the like, and achieves the object of the present invention and can be implemented with appropriate modifications within the scope of the following effects. .
[0024]
【The invention's effect】
The buffer waterproof material manufacturing method and manufacturing apparatus according to the present invention have a structure in which a foaming gas is mechanically mixed and foamed into a one-component thermosetting composition immediately before molding. There is no material loss (referred to as purge loss) because it does not have to be mixed with foaming agent, and it is not affected by outside air such as humidity and temperature, so work management when the work is stopped is very easy Easy. In addition, the volume supply type raw material supply means is used, the supply amount is precise and reproducible, the foaming magnification is easily adjusted accurately and does not vary depending on the work lot, and stable quality is obtained. There is an advantage that the curing work method is not one way but flexible. Furthermore, since the thermosetting composition as a raw material has a critical thermosetting critical temperature, it cures quickly (immediately) above the critical temperature, and the temperature difference between coating and curing is small, thus shortening the cycle of the production cycle. In combination with the rapid (immediate) curing at the above critical temperature, the productivity is excellent.
[0025]
With regard to the obtained waterproofing material, since the foaming gas is mechanically mixed and foamed, most of the bubbles become closed cells, and open cell portions are not generated or very small, and the size of the foam is freely set. Since it can be controlled and made small, the bubble structure becomes close to homogeneous in a macro manner. Therefore, it is possible to obtain a shock-proof waterproof material having excellent mechanical strength and durability, such as a reduction in watertightness due to non-uniformity and an increase in waterproofness as a gasket. In addition, because of its light weight and excellent physical properties, it is possible to realize a product with excellent acoustic vibration characteristics and uniform performance, and to the extent that the adhesive force with the object to be coated such as the frame 7 maintains the adhesion state. Is sufficient, but is not as strong as an adhesive, so it is easy to peel off and is excellent in recyclability. Furthermore, as described above, coupled with the excellent cost performance and easy workability, it has a remarkable effect that cannot be expected from the conventional products when providing products such as the speaker 5. It was.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of a configuration of a shock-proof waterproof material manufacturing apparatus according to a first embodiment.
FIG. 2 is a perspective view of the vicinity of the shock-proof waterproof material of the first embodiment.
FIG. 3 is a partial cross-sectional view of a molded part showing the cushioning waterproof material during molding.
FIG. 4 is a partial cross-sectional view of a molding portion showing a state at the time of molding according to a second embodiment.
FIG. 5 is a temperature characteristic diagram of physical property values of the buffer waterproof material according to the first embodiment.
FIG. 6 is a fracture characteristic diagram showing the mechanical strength of the shock-proof waterproof material at −40 ° C.
FIG. 7 is a distribution explanation histgraph showing the distribution of the bubble diameter of the bubble tissue of the buffer waterproof material.
FIG. 8 is a distribution explanation histgraph showing the distribution of the bubble diameter of the bubble tissue of a conventional buffer waterproof material.
FIG. 9 is an explanatory view showing a bubble structure of the buffer waterproof material of the present invention.
FIG. 10 is an explanatory view showing a cell structure of a conventional buffer waterproof material.
FIG. 11 is a schematic explanatory view of a test piece water leakage measuring apparatus according to the first embodiment.
FIG. 12 is a partial perspective view illustrating a conventional waterproof waterproof material in relation to a speaker.
[Explanation of symbols]
1 cushioning waterproofing material (gasket) of the present invention
DESCRIPTION OF SYMBOLS 1a Conventional buffer waterproof material 2 Corrugation 3 Diaphragm 4 Damper 5 Speaker 6 Voice coil bobbin 7 Frame 8 Outer peripheral edge part 9 Mounting plate 10 Thermosetting composition 11 Gas 12 Foaming thermosetting composition 20 Supply device 21 Heat Source of curable composition 22 Source of gas 30 Mixing device 31 Piston pump 32 of mixing device Piston pump cylinder 33 Piston pump piston 40 Raw material discharge device 41 Discharge device piston pump 42 Nozzle 50 Molding device 53 Microwave antenna 54 Electromagnetic induction coil 55 Application base 56 Recessed portion

Claims (11)

It is a shock-proof waterproof material that is interposed between the outer peripheral edge (8) of the frame (7) of the speaker (5) and the mounting plate (9) and keeps shock buffering and sealing properties between the two. , A foamable thermosetting composition obtained by mechanically mixing a gas (11) with a thermosetting composition (10) whose main component is a latent curing agent inactivated with a polyurethane prepolymer and solid polyamine The product (12) is applied to a predetermined position on the outer peripheral edge (8) of the frame (7) to be applied in a state of less than the thermosetting critical temperature of the foamable thermosetting composition (12), and foamed. The shock-absorbing waterproofing material for a speaker, which is foam-cured and cured into a predetermined shape within a range of the diameter of the internal bubbles within a range of approximately 1 to 100 microns by heating to a temperature equal to or higher than the thermosetting critical temperature of the foamable thermosetting composition (12) . A thermosetting composition (10) mainly composed of a latent curing agent in which a polyurethane prepolymer and a solid polyamine are inactivated, and a gas (11) are mechanically mixed to mix the outer peripheral edge of the frame (7) ( In the method of manufacturing a shock-proof waterproof material that is discharged, foamed and thermally cured at a predetermined position of 8), the foamable thermosetting composition (12) is placed at a predetermined position of the frame (7) in a state of less than the thermosetting critical temperature. The foamed thermosetting composition (12) is heated to a temperature higher than the thermosetting critical temperature while being foamed by the molding apparatus (50), and the diameter of the internal bubbles is in the range of approximately 1 to 100 microns. A method of manufacturing a shock-proof waterproofing material that is foam-cured with the use of a foam. A feeding device (20) for sucking the gas (11) and injecting the thermosetting composition (10) into the gas (11), and mechanically connecting the gas (11) and the thermosetting composition (10). On the outer peripheral edge (8) of the frame (7) on which the cushioning waterproof material (1) is to be formed. At a predetermined position on the outer peripheral edge (8) of the raw material discharge device (40) for pressurizing and discharging to a predetermined position and the frame (7), the foamable thermosetting composition (12) is at or above the thermosetting critical temperature. A shock-proof waterproof material manufacturing apparatus provided with a molding device (50) that is heated and heated and foamed and cured in a range where the diameter of the internal bubbles is approximately 1 to 100 microns .   The cushioning waterproofing material according to claim 1, wherein the bubbles inside the cushioning waterproofing material (1) are made of closed cells alone or both closed and open cells.   2. The shock-proof waterproof material according to claim 1, wherein the skin layer on the surface is integrally formed without defining a clear interface with the inner foam layer. The buffer waterproof material according to claim 1, wherein the density is in the range of 0.15 to 0.9 g / cm ³ .   The shock-proof waterproof material according to claim 1, wherein the speaker frame (7) is another object.   During the application of the foamable thermosetting composition (12), a concave portion (56) is formed in the entire range or a partial range of the application position of the outer peripheral edge (8) of the frame (7), The cushioning waterproofing material according to claim 1, wherein a part of the foamable thermosetting composition (12) is hardened in a state where the foamed thermosetting composition (12) enters and fills the recess (56). Structure to do.   The applied foamable thermosetting composition (12) is heated indirectly above the thermosetting critical temperature by heating the frame (7) by electromagnetic induction heating method in the molding apparatus (50). The method for producing a shock-proof waterproof material according to claim 2, wherein:   The buffer according to claim 2, wherein the applied foamable thermosetting composition (12) is heated to a temperature not lower than the thermosetting critical temperature by a high frequency dielectric heating method in a molding device (50). A method of manufacturing a waterproof material.   The said foamable thermosetting composition (12) apply | coated is more than the thermosetting critical temperature by irradiating an infrared ray in a shaping | molding apparatus (50), The heat curing composition temperature of Claim 2 characterized by the above-mentioned. A method of manufacturing a buffer waterproof material.

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