| 摘要 |
PURPOSE:To provide the mold which has the mechanism molding a hole and is not maximized and capable of being manufactured at low cost by a method in which the pin member for molding a hole is introduced in a mold cavity by was of the elastic force of an elastic body, and a cylinder and the pin member are connected by a flexible connecting member, whereby the pin member is separated from the inside of the cavity. CONSTITUTION:After a cavity has been provided between the first mold 12 and the second mold 14, molten material is supplied into the cavity. The introduced molten material pushes the first casting draw pin 40 in the direction of arrow F, but because the first casting draw pin 40 is pushed in the direction of arrow E by way of the elastic force of a coil spring 56, the first casting draw pin 40 is not displaced. After a specified time has been elasped, the molten material in the cavity is solidified, and a molded product 90 is made. Then, when the first mold 12 is separated from the second mold 14 and a rod 74 is displaced in the direction of arrow D, driving a cylinder 72, the first molding draw pin 40 connected to the end of a wire 54 is displaced in the direction of arrow F against the elastic force of the coil spring 56. Accordingly, the pin part 42 is separated from the molded product 90.
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