主权项 |
1. A method for producing hollow bodies from thermoplastic material, comprising the molding of at least two sheet-like preforms in web form of thermoplastic material into two complementary shells in a multi-part tool, which in a closed position forms a mold impression, and the joining together of the shells to form an essentially closed hollow body, the preforms being brought between the parts of the tool in an opened receiving position of the parts of the tool and the preforms being placed into part-cavities of the parts of the tool by applying differential pressure and being at least partially molded in them into shells, and the shells being joined together to form an essentially closed hollow body by closing the tool to form a closed mold impression, characterized in that the preforms are molded in the part-cavities while the parts of the tool are located in the receiving position, such that the tools remain fixed in place in the opened receiving position of the tool parts or the blow-mold halves, and the preforms are brought up to the opened tool parts, brought to bear and pressed against the cavity concerned while sealing it, so that inflating and/or drawing into the part-cavities of the tool is required essentially without any movement of the blow-mold halves or parts of the tool. |