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

Inactive Publication Date: 2015-11-04
HEXIAN KEJIA VALVE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The valve body release agent currently used has the characteristics of poor release effect and short service life, which will not only affect the quality of the valve body blank, but also increase the production input cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A nano-silica modified paste mold release agent for valve body casting, made of the following raw materials in parts by mass:

[0022] 70kg of methyl silicone oil, 12kg of nano-silica, 15kg of calcium carbonate, 8kg of lard, 6kg of gypsum powder, 5kg of sugarcane wax, 4kg of abietic 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] Its preparation method is as follows:

[0024] (1) First disperse nano-silica in ethanol, 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°C and keep for 20- 30min, and then ultrasonic 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°C for 8-10h, then calcined at 350-400°C for 1-3h, then put it into a ball mill, after ball milling for 10-15m...

Embodiment 2

[0030] A nano-silica modified paste mold release agent for valve body casting, made of the following raw materials in parts by mass:

[0031] Methyl silicone oil 75kg, nano silicon dioxide 13kg, calcium carbonate 16kg, lard 9kg, gypsum powder 8kg, sugarcane 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 Example 1.

Embodiment 3

[0034] A nano-silica modified paste mold release agent for valve body casting, made of the following raw materials in parts by mass:

[0035] 80kg of methyl silicone oil, 15kg of nano-silica, 18kg of calcium carbonate, 11kg of lard, 10kg of gypsum powder, 8kg of sugarcane wax, 7kg of abietic 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 Example 1.

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Abstract

The invention discloses a nanosilicon dioxide modified paste type releasing agent for valve casting and relates to the technical field of releasing agent production. The nanosilicon dioxide modified paste type releasing agent comprises, by mass, 70-80 parts of methylsilicone oil, 12-15 parts of nanosilicon dioxide, 15-18 parts of calcium carbonate, 8-11 parts of lard oil, 6-10 parts of gypsum powder, 5-8 parts of sugarcane wax, 4-7 parts of abietic acid, 3-5 parts of graphite powder, 3-4 parts of alkyl naphthalene sulfonate, 2-4 parts of concentrated nitric acid, 10-12 parts of methyl ethyl ketone, 20-30 parts of ethyl alcohol and 50-60 parts of water. The prepared releasing agent is good in releasing effect, and releasing can be achieved after a valve is fully cooled and shaped, the dimensional precision and the surface quality of the valve body cannot be affected, and service life is long.

Description

Technical field: [0001] The invention relates to the technical field of release agent production, in particular to a nano silicon dioxide modified paste release agent for valve body casting. Background technique: [0002] The valve body is a major part of the valve. There are different mechanical manufacturing methods according to the pressure level, such as casting and forging. Generally, the valve body of the medium and low pressure specifications is usually produced by the casting process. Casting is one of the basic processes of the modern device manufacturing industry. It is a process in which metals are melted into liquids that meet certain requirements and poured into molds, cooled and solidified, and cleaned to obtain castings with predetermined shapes, sizes and properties. Because the casting blank is almost shaped, it achieves the purpose of free machining or a small amount of machining, which reduces the cost and reduces the production time to a certain extent. ...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 黎宏
Owner HEXIAN KEJIA VALVE CASTING
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