Horn vibrating diaphragm and forming technology thereof
A molding process and vibrating film technology, applied in the direction of electrical components, sensors, etc., can solve the problems of no obvious improvement in sound quality, poor rigidity of plastic diaphragm, and affecting the sound quality of speakers, etc., to achieve mass production and good weather resistance , long service life effect
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Embodiment 1
[0045] The molding process of a kind of horn vibrating membrane of the present embodiment comprises the following steps:
[0046] Step (A): Surface treatment of the plastic shell and the intermediate diaphragm to remove impurities;
[0047] Step (B): Place the surface-treated plastic shell and intermediate diaphragm in the rear mold of the injection mold, and then lock the front mold with a certain pressure. After the front mold and the rear mold are closed, the outer surfaces of the mold are respectively Squeeze with an extrusion mold, and then inject liquid silicone into the mold of the injection mold;
[0048] Step (C): Vulcanize the injection-molded liquid silicone to obtain a speaker diaphragm.
[0049] Wherein, the vulcanizing agent is a mixture of N, N'-m-phenylene bismaleimide and xanthic acid at a ratio of 2:0.4 by weight; wherein, the vulcanization molding temperature is 80°C; wherein, the locking front mold The pressure with the rear mold is 10bar; among them, the...
Embodiment 2
[0052] The difference between this embodiment and Example 1 is that the vulcanizing agent of this embodiment is a mixture of N, N'-m-phenylene bismaleimide and xanthic acid in parts by weight of 3-0.35; wherein, The temperature of vulcanization molding is 90°C; wherein, the pressure of locking the front mold and the rear mold is 15bar; wherein, the pressure of the glue at the injection point is 20bar.
[0053] The horn diaphragm Young's modulus that present embodiment makes is 6150N / (mm 2 ), the density is 1.1g / (cm 3 ), the glass transition temperature is 115°C, the relative damping is 0.55, the elongation is 580%, the tensile strength is 9MPa, and the tear strength is 43kN / m.
[0054] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.
Embodiment 3
[0056] The difference between this embodiment and Example 1 is that the vulcanizing agent of this embodiment is a mixture of N, N'-m-phenylene bismaleimide and xanthic acid in parts by weight of 4-0.3; wherein, The temperature of vulcanization molding is 100°C; wherein, the pressure of locking the front mold and the rear mold is 50bar; wherein, the pressure of the glue at the injection point is 40bar.
[0057] The horn diaphragm Young's modulus that present embodiment makes is 6300N / (mm 2 ), the density is 1.2g / (cm 3 ), the glass transition temperature is 120°C, the relative damping is 0.6, the elongation is 520%, the tensile strength is 8.5MPa, and the tear strength is 40kN / m.
[0058] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.
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