Heat-resistant mold release agent for metal die casting and preparation and application of heat-resistant mold release agent

Abstract

The invention discloses a heat-resistant mold release agent for metal die casting and preparation and application of the heat-resistant mold release agent. The heat-resistant mold release agent comprises, by weight, 46-81% of polyacid polyol ester, 1-3% of phosphate ester, 1-5% of active sulfide aliphatic acid ester, 3-8% of non-active sulfide aliphatic acid ester, 1-5% of cleaning agents, 2-10% of tackifiers, 1-3% of copper corrosion inhibitors, 5-10% of graphite powder and 5-10% of molybdenum disulfide. The heat-resistant mold release agent, the preparation and the application have the advantages that synthetic ester which is used as base oil, solid lubricants, the cleaning agents and the like act with one another on the basis of excessively high casting temperatures of large castings, and accordingly the prepared heat-resistant mold release agent is excellent in high-temperature-resistant and heat-resistant performance and lubrication performance, good in stability and long in service life, is simple, safe and environmentally friendly when used, is applicable to mold release operation on diversified large and medium-sized complicated metal castings and is wide in application.

Description

technical field [0001] The invention relates to the field of machining aids, in particular to a heat-resistant release agent for metal die-casting and its preparation and application. Background technique [0002] The release agent is a functional substance between the mold and the finished product. It has heat and stress resistance, is not easy to decompose or wear, and ensures the smooth separation of the workpiece from the mold. Extend mold life. According to the state of the release agent, it can be divided into three types: water-based release agent, oil-based release agent, and solid release agent. At present, water-based release agents are most used in my country. Most of these release agents use vegetable oil, paraffin, etc. as active ingredients for lubrication and release, and are made by adding co-emulsifiers. This kind of release agent has poor heat resistance and can only be used for low temperature release. For large and medium-sized complex castings, due to...

AI Technical Summary

Problems solved by technology

This kind of release agent has poor heat resistance and can only be used for low temperature release

For large and medium-sized complex castings, due to the high die-casting temperature required, this type of release agent evaporates instantly, cannot form a dense film, and cannot provide lubrication performance. Therefore, a release agent with excellent heat resistance is required

There is also a serious defect in this type of release agent in foreign markets, its poor stability and short service life

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