| 摘要 |
PURPOSE: To fit a cover to the inside contours of both of the mold half split parts of a casting mold in a close contact state by opening the cover at a casting position by moving the slide valve of a second mold half split part to a corresponding state through the insertion part of a pressure lever. CONSTITUTION: The central main body 24 of which the entire periphery is covered with a cover 36 is arranged in a mold cavity in such a state that the entire periphery is spaced apart from the inside contours 16, 18 of mold half split parts 12, 14 and an injection head 52 is inserted into the gap between the cover 36 of the mold cavity 20 and the central main body 24 through the opening slit 40 of the cover 36 to inject a reactive mixture into the mold cavity 20. The injection head 52 is drawn out of the opening slit 40 immediately after injection and a slide valve 42 is returned to a mold position. The reactive mixture is foamed during the advance of reaction to perfectly fill the mold cavity 20 and, at the same time, the cover 36 brings the casting mold into close contact with the inside contours 16, 18 of the mold half split parts 12, 14. By this constitution, the cover is well hermetically closed at its casting position and a cushioning member can be simply produced within a short time without using a tape-like reinforcing element. |
