| 摘要 |
PROBLEM TO BE SOLVED: To reduce the flow resistance of a holder part, to improve the flow of a resin, to check the generation of a weld line, and to prevent the deformation or defective molding of the holder part in the insert molding of a key plate and a holder. SOLUTION: A holder part 4 which covers the base part 2a of a key plate 2 is formed by insert molding, and a transponder 7 is inserted in to a holder part 4. The holder part 4 which received the transponder 7 is set in both upper and lower mold 20. The front face 4a and slant face of the holder part 4 are arranged to face the gate 22 of the mold. After the mold being closed, molten polyvinyl chloride(PVC) is packed in a cavity 23 through the gate 22, and PVC is cured. Although PVC introduced from the gate 22 pushes the front part of the holder part 4 opposite to the gate 22, since the front face and slant face of the holder part 4 are formed backward and diagonally, flow resistance is small. |
