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How should dumbbell rubber coating mould be treated? The nitrile compound takes powder at the mixer, and the cast iron core is shot-blasted before coating
Dumbbell coating mould: iHeir-JS117 at 0.5%-1.0% in the nitrile compound, a derusted iron core before coating, plus iHeir-D sheets at 0.1-0.2g in the carton.