Apparatus for manufacturing a plastic hollow body with a blow-molded body part

An apparatus for manufacturing a hollow body from thermoplastic material,

• said hollow body comprises an injection-molded head piece, a body part formed by blow molding a preform segment which segment is integral with the head piece,
• wherewith the said apparatus comprises a ring-shaped nozzle wherein a ring-shaped nozzle opening is defined between a nozzle cone piece and a nozzle opening piece, wherewith a reciprocally movable stamp means is provided in the cone piece,
• a withdrawal device operative with respect to the ring-shaped nozzle is provided, which is axially, reciprocally movable and has a recess, and
• a blow mold with a plurality of blow mold parts which are laterally, reciprocally movable is provided, with said blow mold parts being disposed laterally near the ring-shaped nozzle and the withdrawal device, whereby a blow mold is formed which, when closed, is disposed between the ring-shaped nozzle and the retracted withdrawal device;
• whereby the ring-shaped nozzle opening is radially outwardly offset with respect to the outer edge of a head-piece cavity of the recess on the withdrawal device;
• further in that the side of the recess which side is nearest the ring-shaped nozzle has a disc-shaped space which radially extends beyond the head-piece cavity and is open toward the ring-shaped nozzle, and when the withdrawal device rests on the ring-shaped nozzle the edge regions of said disc-shaped space extend over, but not necessarily beyond, the ring-shaped nozzle opening;
• and in that an end face of the stamp means forms a boundary of the disc-shaped space, and the thickness of the injection-molded disc element can be reduced with the aid of said stamp means.