| 摘要 |
Facing complementary die (5a, 5b) cavities have openings surrounded by annular projections. Two frames (8a, 8b) are located facing each other and projecting, on sides of the molds. Actuators (9a, 9b) open and close the dies. Springs (10a, 10b) allow for partial or complete die closure, during which the annular mold projections make contact. A parison for an envelope around the object (1) is introduced into the open mold and air is blown into it as soon as the frames touch, at least until the dies reach closure. The blow molding is subsequently ejected. Preferred features: Facing surfaces of the dies diverge outside the annular projections. To make an object containing a hollow body (1) air is blown into both body and parison. The actuators oppose each other, on opposite outer sides of the dies. Springs (e.g.) intervene between the frames and abutments (11a, b) fixed to the molds on opposite outer faces. |
