PURPOSE: To allow an ejector plate approach more close to the positional capable of die asseembling by installing an energizing means to separate the ejector plate from a molded goods and using an ejector mechanism to press the ejector plate proximate to the die member, to allow the top end of the ejector pin to project from the forming surface.

CONSTITUTION: A 2nd screw member 32 is screwed onto a 1st screw member 33 abutting on a forming surface side 10b of a die member 10, and a 3rd screw member 31 screwing onto a female screw pin in engaged onto one end side separated from the die member of this 2nd screw member 32. The female screw pin 16 is pulled to the leaving direction from the 1st screw member 33 with the 2nd screw member 32 and by rotating it in the direction to screw into the female screw pin 16 with the 3rd screw member respectively. Then, the ejector plate is allowed to approach onto the die member by the female screw length of the female screw pin 16 and the female screw length of the 2nd screw member. As a result, the ejector plate can be approached beond the die assembling position without removing it from the female screw pin in the midway of the operation.