Scientific Selection Strategies for Die Casting Release Agents

Selecting an appropriate release agent requires consideration of the following key factors:

1. Match Die Casting Alloy and Process Requirements

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.

2. Evaluate Casting Structure and Mold Complexity

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.

3. Prioritize Comprehensive Performance of Release Agents

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.

4. Conduct Small-Batch Production Validation

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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