Nanosilicon dioxide modified paste type releasing agent for valve casting
A technology of nano-silica and mold release agent, which is applied in the direction of casting molding equipment, molds, mold components, etc., can solve the problems of affecting the quality of valve body blanks, increasing production input costs, short service life, etc., and achieve mold release Good effect, long service life, easy to use
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[0020] Example 1
[0021] A nano-silica modified paste mold release agent for valve body casting, which is made of the following mass parts of raw materials:
[0022] 70kg of methyl silicone oil, 12kg of nano silica, 15kg of calcium carbonate, 8kg of lard, 6kg of gypsum powder, 5kg of sugar cane wax, 4kg of rosin acid, 3kg of graphite powder, 3kg of alkyl naphthalene sulfonate, 2kg of concentrated nitric acid, methyl ethyl Base ketone 10kg, ethanol 20kg, water 50kg;
[0023] The preparation method is as follows:
[0024] (1) Disperse nano-silica in ethanol first, soak for 1-2h, then add methyl silicone oil dissolved in methyl ethyl ketone, mix well, then add concentrated nitric acid, heat up to 50-60℃ and keep for 20- 30min, then sonicate for 15-20min at an ultrasonic frequency of 22kHz and a power of 50W to obtain modified methyl silicone oil;
[0025] (2) Dry the gypsum powder at 70-80℃ for 8-10h, and then calcinate it at 350-400℃ for 1-3h, then add it to a ball mill, and add calciu...
Example Embodiment
[0029] Example 2
[0030] A nano-silica modified paste mold release agent for valve body casting, which is made of the following mass parts of raw materials:
[0031] Methyl silicone oil 75kg, nano silica 13kg, calcium carbonate 16kg, lard 9kg, gypsum powder 8kg, sugar cane wax 6kg, rosin acid 5kg, graphite powder 4kg, alkyl naphthalene sulfonate 3kg, concentrated nitric acid 2kg, methyl ethyl Base ketone 11kg, ethanol 25kg, water 55kg.
[0032] The preparation method of the release agent of this embodiment is the same as that of embodiment 1.
Example Embodiment
[0033] Example 3
[0034] A nano-silica modified paste mold release agent for valve body casting, which is made of the following mass parts of raw materials:
[0035] 80kg of methyl silicone oil, 15kg of nano silica, 18kg of calcium carbonate, 11kg of lard, 10kg of gypsum powder, 8kg of sugar cane wax, 7kg of rosin acid, 5kg of graphite powder, 4kg of alkyl naphthalene sulfonate, 4kg of concentrated nitric acid, methyl ethyl Base ketone 12kg, ethanol 30kg, water 60kg.
[0036] The preparation method of the release agent of this embodiment is the same as that of embodiment 1.
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