Die casting release agents serve four core functions, with demolding as the primary one, followed by lubrication and isolation, and then temperature reduction.
Die casting release agents form a high-temperature-resistant, dense film on the mold surface. This allows rapidly flowing aluminum/magnesium melts to fill the mold smoothly and form castings while protecting the mold and extending its service life.
Containing lubricating components, the agent—when sprayed uniformly in appropriate amounts—prevents direct contact between the casting melt and mold, reducing friction. This ensures high-quality, smooth castings. Insufficient lubrication leads to workpiece sticking, demolding difficulties, and shorter mold life.
Water-based metal die casting release agents create a nano-level film on the mold, effectively isolating it from the casting. This not only facilitates superior casting quality but also further protects the mold.
Water-based release agents have an oil-in-water structure. When sprayed onto the mold (via gun or automatic system), the water evaporates rapidly at normal mold temperatures (200–350°C). This vaporization absorbs heat, providing mild cooling—though less significant than cooling water or mold temperature controllers.
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