Process and Device for the Manufacture of a Particularly Heat-Resistant Hollow Body

Process for the manufacture of a hollow body (7) which is molded from a heated preform of thermoplastic plastic in a contoured blow mold (2a) comprising:

• i) Stretching the hollow body (7) and introducing a first medium into the preform, which first medium is stored in a first medium storage unit (32) and is under a first pressure (p1);
• ii) Introducing a second medium into the hollow body (7), which second medium is stored in a second medium storage unit (31) and is under a second pressure (p2) which is higher than the first pressure (p1);
• iii) Cooling the hollow body (7) from the inside by admitting a third medium, which third medium is stored in a third medium storage unit (33) and is under a third pressure which (p3) is higher than the second pressure (p2) and molding out the hollow body (7) that results from the pressure difference;
• iv) Producing a connection between the third medium storage unit (33) and one of the first and second medium storage units through the hollow body (7) and internally cooling the hollow body that results from the same (7);
• v) Separating the connection and releasing at least one of the first, second and third medium from the hollow body (7), so that ambient pressure prevails in the hollow body (7).