Selecting an appropriate release agent requires consideration of the following key factors:
Zinc, aluminum, and magnesium alloys exhibit distinct melting points and reactivities; thus, release agents with corresponding thermal stability and reactivity must be chosen. For castings with stringent post-coating requirements (e.g., painting), silicon-free release agents are mandatory to prevent silicone oil migration from compromising coating adhesion.
For castings with complex geometries, deep cavities, or multiple sharp edges, release agents must deliver excellent wettability and spreadability to uniformly coat every recess. Simpler castings may allow the use of more cost-effective alternatives.
Opt for water-based release agents with high thermal stability, low residue, and environmental friendliness. Reference technical data provided by suppliers (e.g., TGA curves, solid content) to assess performance metrics.
After shortlisting candidate products, perform small-batch trials. Under actual operating conditions, comprehensively evaluate their impact on casting quality, mold condition, and production efficiency to confirm suitability.
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