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    • 3. 发明授权
    • Method for manufacturing diaphragm for use in electroacoustic transducer
    • 制造用于电声换能器的隔膜的方法
    • US07704428B2
    • 2010-04-27
    • US11114222
    • 2005-04-26
    • Koji TakayamaMasatoshi SatoShinichi HayasakaHiroyuki Kobayashi
    • Koji TakayamaMasatoshi SatoShinichi HayasakaHiroyuki Kobayashi
    • B29C45/14
    • H04R31/003B29C45/14065B29C45/1418B29C45/14467B29C2045/14147B29C2045/14532B29K2995/0001
    • A method for manufacturing a diaphragm for use in an electroacoustic transducer in a multi-layer structure which includes a first diaphragm layer of synthetic resin molded in a predetermined shape by injection molding and a second diaphragm layer layered in intimate contact on the first diaphragm layer and made of substance different from the first diaphragm layer, includes executing successively a pre-molding step and an injection-molding step, thereby providing the multi-layer structure. The pre-molding step includes attaching a non-molded sheet-like material which is a raw material of the second diaphragm layer to a mating surface of one of the die part of an injection molding die, and closing thereafter the injection molding die to give the sheet-like material a predetermined diaphragm shape. The injection molding step includes injecting synthetic resin material constituting the first diaphragm layer into the injection molding die thus closed thereby to form the first diaphragm layer.
    • 一种制造用于多层结构的电声换能器的隔膜的方法,该隔膜包括通过注塑成型为预定形状的合成树脂的第一隔膜层和在第一隔膜层上紧密接触而形成的第二隔膜层,以及 由与第一隔膜层不同的物质制成,包括连续执行预成型步骤和注射成型步骤,由此提供多层结构。 预成型步骤包括将作为第二隔膜层的原料的非成型片状材料附着到注射成型模具的模具部分的配合面,然后关闭注射成型模具,得到 片状材料具有预定的膜片形状。 注射成型步骤包括将构成第一隔膜层的合成树脂材料注入到如此封闭的注塑模具中,从而形成第一隔膜层。
    • 6. 发明授权
    • Method for fabrication of perforated composite
    • 多孔复合材料的制造方法
    • US06451241B1
    • 2002-09-17
    • US08627213
    • 1996-02-01
    • Alla OhligerMahendra MaheshwariJoe Franklin Spangler
    • Alla OhligerMahendra MaheshwariJoe Franklin Spangler
    • B28B148
    • B29C70/545B29C70/44B29K2995/0001
    • A sheet of uncured polymer, which is preferably reinforced with multiple layers of fiber, is staged or partially cured to a state in which the sheet is rigid at room temperature. Multiple apertures are drilled into, and preferably through, the sheet. The apertures are for acoustic or laminar flow control, and include holes having diameters in the range of 0.025 to 0.120 inch. In the case in which the fabricated panels must conform to a particular shape, the perforated, partially cured panels are heated to a temperature at which the panel softens, and conformed to the desired surface. The partially cured, perforated sheets are then cured. In order to prevent closure of the drilled holes during the cure, the perforated panel is sandwiched between two layers of glass fabric and cured on an elastomeric tool surface which expands with increases in temperature, forcing the glass fabric to seal the holes during cure. Release coatings are used to aid panel/liner separation.
    • 优选用多层纤维增强的未固化聚合物片段被分段或部分固化至在室温下片材刚性的状态。 多个孔钻入,优选穿过片材。 这些孔用于声学或层流控制,并且包括直径在0.025至0.120英寸范围内的孔。 在制造的面板必须符合特定形状的情况下,穿孔的部分固化的面板被加热到面板软化并符合所需表面的温度。 然后将部分固化的多孔板固化。 为了防止固化期间钻孔的闭合,穿孔板夹在两层玻璃织物之间,并在弹性体工具表面上固化,随着温度升高而膨胀,迫使玻璃织物在固化期间密封孔。 剥离涂层用于帮助板/衬套分离。