Water-based release agent for die-casting aluminum alloy and preparation method thereof

Abstract

The invention discloses a die casting aluminium alloy water-based release agent and a preparation method thereof, and relates to release agents and preparation methods thereof. The preparation methodcomprises the steps that engine oil, beewax, organic molybdenum compounds and silicone oil are placed in a water bath kettle to be mixed and heated to be 50 DEG C to 80 DEG C, the materials are stirred with an electric stirring machine, polyoxyethylene aliphatate and polyoxyethylene oleyl ether are slowly added after uniform stirring, hot water is added while stirring, and the materials are emulsified into an emulsion, wherein hot water is tap water or purified water, and the heating temperature is 50 DEG C to 80 DEG C; when the emulsion is cooled to the room temperature, silicon dioxide is added while stirring, and then, stearic acid, ethyl alcohol, triethanolamine, an organosilicone wetting agent, sodium benzoate, sodium phosphate, a thickening agent, sodium nitrite and sorbic acid are added. The release agent prepared through the preparation method contains ultrafine silicon dioxide, silicone oil, and the like, heat resistance is excellent, the surface of a casting is smooth, mold sticking, strain damage or deformation defects are effectively prevented, the lubricating property of the water-based release agent is remarkably improved through lubricating oil, beewax, the organic molybdenum compounds, and the like, and the demolding property is remarkably improved.

Description

technical field [0001] The invention relates to a release agent and a preparation method thereof, in particular to a die-casting aluminum alloy water-based release agent and a preparation method thereof. Background technique [0002] Die casting is a method of filling the die-casting mold cavity with liquid or semi-liquid metal at a high speed under high pressure, and forming and solidifying under pressure to obtain castings. In die casting, in order to make the castings can be easily removed from the mold, a release agent is sprayed on the inner surface of the die casting cavity to form a thin film, so as to prevent sticking, improve the formability of the metal, and improve the quality of die castings. The release agent is an important auxiliary material for obtaining high-quality die castings. The surface quality, internal quality and mold life of die castings are closely related to the release agent. There are three main types of release agents: oily, water-based and so...

AI Technical Summary

Problems solved by technology

There are three main types of release agents: oily, water-based and solid powder. At present, the amount of water-based release agent for die-casting aluminum alloys is the largest. Generally, the base oil, lubricant and water are emulsified by surfactants, and various additives are added. At present, in my country The release agent produced has a general release effect, low stability, easy delamination, and poor comprehensive performance