| 摘要 |
PURPOSE:To make a synthetic resin hardly releasable from a knife edge member and to absorb the shrinkage, by forming rectangular anchoring slots in the edge member and embedding the edge member in the synthetic resin in the manufacture of scissors wherein edge members punched out from a steel plate are embedded in a synthetic resin. CONSTITUTION:The edge member 21 of each of scissors are punched out from a steel plate, a fulcrum hole 23 is formed in a fulcrum point of the edge member 21, and the rectangular anchoring slots 24 each having a barb only opposite to the side of the fulcrum hole 23 is also punched. The edge member 21 is rolled so that the barbs 25 are buried in the anchoring slots 24. Positioning pins of a plastic molding mold smaller than the anchoring slot 24 are fitted and positioned in the anchoring slots of the edge member 21 on the side of the fulcrum hole 23 and the edge member 21 is subjected to insert molding by a plastic molder. |
