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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Example Embodiment
[0044] Example 1
[0045] The forming process of the horn diaphragm of this embodiment includes the following steps:
[0046] Step (A): Surface treatment of the plastic shell and intermediate diaphragm to remove impurities;
[0047] Step (B): Place the surface-treated plastic shell and the middle diaphragm in the back mold of the injection mold, and then lock the front mold with a certain pressure. After the front mold and the back mold are closed, the outer sides of the mold are respectively Use an extrusion mold for extrusion, and then inject liquid silicone into the injection mold;
[0048] Step (C): vulcanize the injected liquid silicone rubber to form a horn diaphragm.
[0049] Among them, the vulcanizing agent is a mixture of N,N'-m-phenylene bismaleimide and xanthogenic acid in a weight ratio of 2:0.4; wherein, the temperature of vulcanization molding is 80°C; wherein, the front mold is locked The pressure with the back mold is 10bar; among them, the pressure of the glue at the...
Example Embodiment
[0051] Example 2
[0052] The difference between this embodiment and embodiment 1 is that: the vulcanizing agent of this embodiment is a mixture of N,N'-m-phenylene bismaleimide and xanthogenic acid in parts by weight of 3-0.35; wherein, The temperature of vulcanization molding is 90°C; the pressure for locking the front mold and the back mold is 15bar; among them, the pressure of the glue at the injection site is 20bar.
[0053] The Young's modulus of the horn diaphragm prepared in this embodiment is 6150N / (mm 2 ), the density is 1.1g / (cm 3 ), the glass transition temperature is 115℃, 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.
Example Embodiment
[0055] Example 3
[0056] The difference between this embodiment and embodiment 1 is that: the vulcanizing agent of this embodiment is a mixture of N,N'-m-phenylene bismaleimide and xanthogenic acid in parts by weight of 4-0.3; wherein, The temperature of vulcanization molding is 100°C; the pressure for locking the front mold and the back mold is 50bar; among them, the pressure of the glue at the injection site is 40bar.
[0057] The Young's modulus of the horn diaphragm prepared in this embodiment is 6300N / (mm 2 ), the density is 1.2g / (cm 3 ), the glass transition temperature is 120℃, 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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