| 摘要 |
PROBLEM TO BE SOLVED: To avoid a loss of a product value caused by mixture of a resin residue with other synthetic resin materials when the resin residue comprising a sprue, a runner and a gate formed together with a product is recycled when the synthetic resin material is injection-molded. SOLUTION: An identification mark portion (5) showing a used synthetic resin material is formed on the outer surface of at least one of the sprue (2), the runner (3) and the gate (4) of the resin residue portion (1) composed of the sprue (2), the runner (3) and the gate (4) to prevent confusion of the used synthetic resin material of the resin residue portion. COPYRIGHT: (C)2006,JPO&NCIPI
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