An apparatus for forming a slide fastener chain includes an injection molding machine with a mold, a sprue and runner cutter adjacent the mold, a pelletizer adjacent to the cutter for reducing the sprues and runners to particle size which are delivered to a first hopper, a second hopper for fresh molding materials, a mixing hopper for blending the used and fresh molding materials to be fed to the mold, and controls for regulating the proportions of used and fresh materials.
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