Nano graphite modified powdery demolding agent for valve casting

A technology of nano-graphite powder and nano-graphite, which is applied in the direction of casting molding equipment, molds, and mold components, can solve the problems of short service life, poor demoulding effect, and increased production input costs, and achieve good demoulding effect, The effect of long service life

Active Publication Date: 2015-10-07
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-graphite modified powder release agent for valve body casting, made of the following raw materials in parts by mass:

[0022] 60 parts of polyethylene wax powder, 15 parts of nano-graphite powder, 12 parts of calcined kaolin, 11 parts of cork powder, 8 parts of titanium dioxide, 7 parts of butter, 5 parts of silicon micropowder, 4 parts of carboxymethyl chitosan, 3 parts of concentrated hydrochloric acid 2 parts, 2 parts of lauric acid, 40 parts of n-heptane, 25 parts of toluene, 65 parts of water;

[0023] Its preparation method comprises the following steps:

[0024] (1) First place the nano-graphite powder at 45-50°C for 2 hours in vacuum, then calcinate at 350-400°C for 3 hours to obtain calcined nano-graphite powder;

[0025] (2) Fully dissolve polyethylene wax powder in a mixed solvent of n-heptane and toluene, then add calcined nano-graphite powder and concentrated hydrochloric acid, disperse evenly, and microwave at a microwave frequency of 2450MHz and a...

Embodiment 2

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

[0031] 65 parts of polyethylene wax powder, 15 parts of nano-graphite powder, 13 parts of calcined kaolin, 11 parts of cork powder, 9 parts of titanium dioxide, 8 parts of butter, 6 parts of silicon micropowder, 5 parts of carboxymethyl chitosan, 3 parts of concentrated hydrochloric acid parts, 2 parts of lauric acid, 45 parts of n-heptane, 30 parts of toluene, and 65 parts of water.

[0032] The preparation method of the release agent of this embodiment is the same as that of Example 1.

Embodiment 3

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

[0035] 70 parts of polyethylene wax powder, 18 parts of nano-graphite powder, 15 parts of calcined kaolin, 13 parts of cork powder, 10 parts of titanium dioxide, 9 parts of butter, 7 parts of silicon micropowder, 6 parts of carboxymethyl chitosan, 4 parts of concentrated hydrochloric acid parts, 3 parts of lauric acid, 45 parts of n-heptane, 30 parts of toluene, and 70 parts of water.

[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 nano graphite modified powdery demolding agent for valve casting and relates to the technical field of demolding agent production. The nano graphite modified powdery demolding agent is prepared by the following raw materials in part by mass: 60-70 parts of polyethylene wax powder, 15-18 parts of nano graphite powder, 12-15 parts of calcined kaolin, 10-13 parts of cork powder, 8-10 parts of titanium dioxide, 6-9 parts of beef tallow, 5-7 parts of silica micropowder, 4-6 parts of carboxymethyl chitosan, 3-4 parts of concentrated hydrochloric acid, 2-3 parts of dodecanedioic acid, 40-45 parts of normal heptane, 25-30 parts of methylbenzene and 60-70 parts of water. The nano graphite improved powdery demolding agent is good in demolding effect, demolding can be implemented after a valve is fully cooled and shaped, size accuracy and surface quality of the valve are not affected, and the nano graphite improved powdery demolding agent is long in service life.

Description

Technical field: [0001] The invention relates to the technical field of release agent production, in particular to a nano-graphite modified powder 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. The ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 黎宏
Owner HEXIAN KEJIA VALVE CASTING
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