Method for preparing release agent for precision casting

Abstract

The invention discloses a preparation method of a release agent for precision casting, and belongs to the technical field of release agents. The steps are: (1) Weigh 3~5 parts of titanium dioxide, 11~16 parts of quicklime, 7~9 parts of zinc oxide, and 8~12 parts of octylphenol polyoxyethylene ether in parts by mass, and add them into the disperser; ( 2) Put the dispersed mixture in step (1) into the reaction kettle. When the temperature of the reaction kettle reaches 40~45°C, after constant temperature reaction for 30~35 minutes, weigh 6~7 parts of dibutyltin dilaurate by mass And add to the reactor, control the temperature rise rate to 3~4°C / min, when the temperature of the reactor reaches 58~62°C, weigh 27~30 parts of hydrogenated terphenyl and 20~25 parts of 320 heat transfer oil according to the parts by mass; (3) Cool the mixture in step (2) to 20~25°C, weigh 5~8 parts of kerosene and 10~13 parts of butyl acrylate in parts by mass, and mix them with the mixture in step (2). The production cost of the invention is low, and the demoulding effect of the demoulding agent is good, and the reject rate is reduced.

Description

technical field [0001] The invention relates to the technical field of release agents, in particular to a method for preparing a release agent for precision casting. Background technique [0002] Due to the advantages of high precision, low surface roughness, high flexibility, strong adaptability, material and labor saving, precision castings are widely used in electronics, petroleum, chemical industry, transportation, light industry, textile, pharmaceutical, medical equipment, pumps, etc. It has been widely used in a wide range of fields such as valve components, especially complex structural accessories. In the investment casting process, the production of the core and the selection of the release agent are crucial. [0003] At present, the cores often used in precision casting are urea cores. A good release agent requires that in addition to removing the metal parts from the mold, it must also act as a lubricant to make the parts of the mold slide, and also Improves the...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the relatively poor deficiencies of the release agent in the prior art, and provides a method for preparing a release agent for precision casting. The release agent prepared by the method of the present invention can make The surface of the core no longer sticks to the surface of the mold, which improves the demoulding effect and reduces the scrap rate