1. It's recommended to apply a layer of release oil to the core wire surface before extruding.
2. There are three possible solutions: 1. Applying talcum powder to the surface is relatively inexpensive but generally effective; 2. Applying a layer of silicone oil to the surface is more expensive but provides the best results; 3. Applying a layer of rubber release agent to the surface is the lowest cost and most effective.
