Polymer Ester Mold Release Agent for High-Temperature Die Casting
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Solution Overview
Problem
Die casting mold release agents experience degraded mold releasability when cycle time is shortened, leading to increased mold temperatures, which affects productivity.
Innovation Solution
A mold release agent composition incorporating polymer esters with specific structural units, such as dibasic acids, monobasic acids, and polyhydric alcohols, along with silicone oil and hydrocarbon solvents or surfactants, is applied to maintain effective mold releasability even at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cycle time is shortened to improve productivity, then productivity increases, but mold temperature increases causing degraded mold releasability
Solution Approach 1:
The invention changes the chemical composition parameters of the release agent by incorporating polymer esters with specific molecular weights (3,000-160,000) and viscosity ranges (100-5,000 mm²/s at 100°C). This compositional parameter change enables the release agent to maintain effective mold releasability even when mold temperature increases due to shortened cycle times, thus resolving the contradiction between productivity improvement and mold releasability degradation
Solution Approach 2:
The invention creates a composite release agent system by combining polymer esters with traditional release agent components (silicone oil, hydrocarbon solvents, surfactants). This composite formulation synergistically combines the high-temperature stability of polymer esters with the lubricating and releasing properties of conventional components, enabling maintained mold releasability under high-temperature conditions while supporting shortened cycle times for improved productivity
2Force
If oil-based release agents are used to improve lubricating property, then lubricating property increases, but spray property deteriorates
Solution Approach 1:
The invention resolves this contradiction by precisely controlling the viscosity parameter of polymer esters (100-5,000 mm²/s at 100°C) and molecular weight (3,000-160,000). These parameter changes enable the release agent to achieve optimal balance: sufficient viscosity for lubricating property while maintaining low enough viscosity for good sprayability. The polymer ester structure provides lubrication without the excessive viscosity that plagues conventional oil-based agents
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition ensures good mold releasability at high temperatures, eliminating the need for mold cooling and allowing for improved productivity with shorter cycle times.
Implementation Method 1
for lubrication of cavities in molds, mold release agents are applied in a form of spray after mold opening, to form an oil film on the surfaces of the cavities
Implementation Method 2
By this, welding of molten nonferrous metals such as aluminum, magnesium, zinc, etc. to the cavities is prevented
Data Source
AI summary
Provided is a mold release agent composition containing a polymer ester, the composition exerting a good mold releasability even when the temperature of mold increases, and a die casting method using the composition.