Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS5119522 C2, ooooPl) + patent application 4′1 year? March 7 address Tokyo Metropolitan area Iku-ku Aobadai 6-chome 17 4. Attached crockery list ■ Japan Patent Office ■ JPA 5 l-495 2264-f; / C. Hc) 4F? , 31 / DO specification 1, title of the invention Acoustic diaphragm and method of manufacturing the same 3. Detailed Description of the Invention The present invention relates to an acoustic diaphragm using metal plated fibers and a method of manufacturing the same. Among various physical properties required for the acoustic diaphragm, among them, there are a large Young's modulus, a large propagation velocity of longitudinal waves, and a moderately large internal loss. However, it is a contradictory requirement that the large Young's modulus and propagation speed and the large internal loss are contradictory requirements, and it is extremely difficult to satisfy both at the same time. It has For example, a composite cone of a large internal loss corn material and a metal foil with a large Young's modulus, a multi-layered pulp with a large internal loss pulp and a fiber with a high Young's modulus, a synthetic resin, rubber, etc. In addition, the surface of the table is glued with a high-velocity inorganic material, and the surface is too numerous to count. However, even in the conventional method, there is a disadvantage individually, for example, in the case of a laminated cone, it is necessary to use an adhesive, and the adhesive applied to the entire surface of the cone is used only to a cone material having a large internal loss. The adhesive itself, which penetrated in 1 and lost its intended purpose, resulted in deterioration of the sound quality. Moreover, in the multi-layer corn, although the obstacle by the adhesive is removed, it is not possible to squeeze the one having a high propagation speed of metal like on the front and back of the cone EndPage: 1 using the existing multilayer grinding technique. Even if sufficient attention is paid to the beating of wood pulp etc., there is a limit. In the impregnation method, it is difficult to adjust the deterioration of sound quality and Young i and internal loss 10-05-2019 1 due to the influence of the impregnating agent. In the case, the weight is large and the range of use is narrow. The present invention solves the above-mentioned conventional defects and obtains the required physical properties without using any adhesive impregnant that interferes with the sound quality, and further using a more specific technique of multi-layer production. It is an object of the present invention to provide a diaphragm for a wide range of applications having the required physical properties and sound quality. Acoustic diaphragm and method of manufacturing the same Hereinafter, the present invention will be described in detail. The method of metal plating on the surface of a natural fiber or synthetic fiber is well known, and in the metal plated fiber, metal particles 2 cover the surface of the fiber 1 as shown in the figure. Therefore, such gold plated fibers do not impair the internal loss of the fibers themselves, and the metal particles 2 are firmly adhered to the surface of the fibers 1, and the metal particles are continuously deposited. So you can get a big propagation speed. The diaphragm is not merely required to have a large Young's modulus, but must be adjusted in relation to internal loss. In this case, in the case of using the above gold or metal plated fiber, it can be freely set by adjusting the plating amount. For example, in the plating process, the density of the degree of plating can be freely controlled by activating the fiber, adjusting the plating solution, or the like. In addition, it is possible to adjust the propagation speed by appropriately selecting the plating material as Ou, N], Zn or the like. There are two forms in the case of using the above-mentioned metal plated fiber as a diaphragm material. That is, there are a form in which metal plated fibers are mixed with other wood fibers and the like to make a sheet, and a form in which a sheet is made only with the metal plated fibers. For the purpose of the present invention, any form may be used, and any desired effects can be obtained. In the case of the former, it can be said that the conventional method of mixing different materials such as wool, rayon, etc. into wood fibers can be performed in exactly the same manner, but as in the latter case, In this case, the strength is relatively low, and in some cases, sufficient strength as a diaphragm can not be obtained. However, since the metal particles plated as described above are in intimate contact with the surface of the fiber very firmly, even if the same beating is carried out when removing paper, peeling of the plating is minimal, so the advantages of metal plating are as follows. The beating process can be carried out without any reduction in the thickness, so that it is possible to obtain a diaphragm having sufficient strength even with metal plated fibers alone. There are a press type and a non-press type for the forming process after the paper making, and the forming according to the purpose is performed respectively. According to the acoustic diaphragm of the present invention, the metal plated fiber of the material is that the metal particles cover the fiber surface and damage the internal loss of the fiber itself, the metal particles are continuous on the fiber surface Since it is deposited and firmly adhered, it is possible to obtain a diaphragm that has a large blow rate and propagation speed. Further, Young's modulus, propagation speed and internal loss can be appropriately 10-05-2019 2 adjusted by appropriately selecting the plating amount of the metal plating fiber and the plating material, and there is an advantage that a diaphragm having a wide application can be provided. 4 Brief Description of the Drawings The drawing is an enlarged view schematically showing a metal plating fiber incorporated as a material of the acoustic diaphragm of the present invention, in which 1 indicates fibers and 2 indicates metal particles. EndPage: 2 10-05-2019 3
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