| 摘要 |
The device has a mold (1) with two semi-molds (3a, 3b) having parts on or near surfaces (9a, 9b) turned towards a blowing nozzle (16) i.e. bell-nozzle, where the parts define a male element (A). A blowing assembly (2) has a female element (B) internally edged in the part by a lateral wall (30) inclined complementary to the inclination of a lateral wall (11) of the element (A). The element (B) is dimensioned to tightly surround the element (A) in a blowing position of the assembly. The isolating cooperation of the elements provides the locking of an upper part of the mold in a closing position.
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