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 JPS57121396 Ming # fI Ministry 1, the name of the invention Method of manufacturing an edge for a speaker diaphragm 3. Detailed Description of the Invention The present invention relates to a method of manufacturing an edge for a speaker diaphragm. The edge for a speaker diaphragm needs to be formed of a material having a large internal loss, in particular, in order to prevent resonance. Materials having a large internal loss include, for example, plastic or plastic foam, and of these, there was the one shown in FIG. 1 for forming an edge using the plastic foam. That is, for example, polyurethane 7 foam as plastic 7 ohms, a fabric material of this polyurethane based foam, an annular edge construction piece C having an inner diameter and an outer diameter of a desired edge, leaving a yield BI + 82. After cutting, the edge-constituting pieces C are heat-treated and pressure-treated to form an edge. However, with this method, only the area about h of the entire area of the fabric material can take the edge configuration piece C for EndPage: 1 molding the edge, and the yield BI + 82 is wasted . The present invention has been made in view of the above-described points, and the object of the present invention is to minimize yield loss from a fabric material, and to make it possible to use a large number of edges from one edgeconstituting base material. It is an object of the present invention to provide a method of manufacturing an edge for a speaker diaphragm in which an edge can be formed by a simple process and apparatus because materials can be effectively used since component pieces can be formed without waste. Hereinafter, the present invention will be described together with the apparatus used in accordance with FIG. In FIG. 6, 1 is an upper mold and 2 is a lower mold, and the upper mold 1 and the lower mold 2 have desired shapes to be molded. Then, in order to form an edge using the above-described apparatus, first, as a first step, the cylindrical fabric material 3 formed of thermoplastic plastic foam is spirally wound so as to peel off the skin, and the width of 12-05-2019 1 the edge is substantially the same as the width Slice 4 (Figures 2 and 3). Then, in the second step, the material material 3 sliced in the spiral shape is sliced at a thickness of about half or less of the thickness of the edge in the direction orthogonal to the axial length direction, and the strip 6 is formed. As a third step, the above-mentioned strip 6 is ring-shaped into two or more pieces (FIG. 5) and housed in the lower mold 2, and then the upper mold 1 and the lower mold 2 are butted, Heat and press (FIG. 6) to form an edge. Hereinafter, the present invention will be specifically described according to one embodiment. In the first step, polyurethane-form (for example, urethane foam) 'f: A columnar material 3 having parallel upper and lower end faces and having a columnar shape is prepared, and the material 3 is peeled from the periphery toward the center Slice 4 in a spiral shape to the width of the edge (for example, 10 to 60 m). At this time, a part of the outer periphery is the remaining yield. Next, as the second step, the dough 3 sliced in a spiral shape 4 is sliced 5 in a thickness direction of about half or less of the thickness of the edge in the direction of 9 in the axial direction and + ', for example 1 to 10 inches). , Strip 6 is formed. Since the strip 6 is required to be sliced in a spiral shape, it tends to curl naturally. Therefore, when the strip 6 is placed on a flat surface, the lower strip of the press may be used as a third process which is convenient for naturally molding a ring-like and a nari endless edge. After being contained in 2, the pressure is applied by the upper mold 1 and heat treatment is performed. In this case, the temperature varies depending on the composition of the heating / heating type, the urethane type / form used, the thickness, and the filler of the upper mold 1 and the lower mold 2; Is about 3 K 97 cm "; about 20 seconds. Then, the strip 6 becomes an endless edge due to the self-bonding by the above-mentioned molding. Therefore, even if the strip 6 is stacked several times, the self-fluxing layer forms an inconspicuous integrated edge of the seam. In addition, it is necessary to change the hardness of the edge depending on the 4s [used], but the hardness can be easily changed by changing the number of overlapping strips 6. できる。 Since the remaining strip 6 has a large degree of freedom in curling, the same strip 6 can also form an edge of a machine having a different diameter. EndPage: 2 or more 2) As in the present invention, a cylindrical dough material is spirally sliced and sliced in the direction orthogonal to the axial direction to obtain a strip, and the strip is heated by pressing, As pressure is applied to form an endless edge, a large number of edges can be formed from one fabric material, and at the same time, waste of material is eliminated, and the material can be used effectively. In addition, since it is possible to easily form an edge with different hardness and a large edge metal with one strip, cost can be reduced. 4. Brief description of the drawings m1 is a front view of a state in which an edge component is cut out from a dough phase in the conventional edge manufacturing method, and FIGS. 2 to 6 show the process of the present invention 96, 2 is a perspective view of the base material, FIG. 3 is a perspective view showing a first step of fluoride, FIG. 4 is a perspective view showing a second step, and FIG. 5 is a perspective view of a strip obtained by the above, FIG. The figure is a 12-05-2019 2 cross-sectional view showing the third step. 1 .... - - the upper mold 2 ...... lower mold 3 ······ fabric material 6 .... - - strip cantilever Patent Applicant Pioneer body, Ltd. 11 Figure Δ 3 14 −43EndPage: 3 12-05-2019 3
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