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US 7,892,477 B2Granted
Process and device for the manufacture of a particularly heat-resistant hollow body
AssigneeKrones AG
InventorJochen Hirdina
Life of this patent
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AssigneeKrones AG
InventorJochen Hirdina
Estimating the term…
A process and a device for the manufacture of a hollow body, particularly of a heat-resistant hollow body, which is molded out of a heated preform of thermoplastic plastic in a contoured blow mold through the introduction of a first medium into the preform, which medium is stored in a first medium storage unit and is under a pressure (p1) (preblowing phase), and the more or less simultaneous stretching of the hollow body through a stretching rod and the introduction of a second medium in the hollow body, which medium is stored in a second medium storage unit and the pressure of which (p2) is higher than the pressure of the first medium (p1) (final blowing phase), and which is cooled by a third medium, which is medium stored in a third medium storage unit (rinsing phase), whereby the preblowing medium is under a pressure of approximately 2-20 bar, the final blowing medium is under a pressure of approximately 15-45 bar, and the cooling medium is under a pressure of approximately 30-45 bar.
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:
Device for the manufacture of a hollow body (7), comprising molding apparatus for molding out the hollow body (7) from a heated preform (7) of thermoplastic plastic in a contoured blow mold (2a), a first medium storage unit (32) for storing a first medium to be introduced into the preform (7), the first medium being under a first pressure (p1), a stretching rod (6) for substantially simultaneous stretching of the hollow body (7), a second medium storage unit (31) for storing a second medium to be introduced into the hollow body (7), the second medium being under a second pressure (p2) which is higher than the first pressure (p1), and a third medium storage unit (33) for storing a third medium for cooling the hollow body (7), the first medium being under a pressure of approximately 2-20 bar, the second medium being under a pressure of approximately 15-45 bar, and the third medium being under a pressure of approximately 30-45 bar, wherein the medium storage means (31, 32, 33) are so arranged that a connection from the third medium storage means (33) to a lower pressure medium storage means (31, 32) can be effected.
Device for the manufacture of a hollow body (7), comprising a molding apparatus for molding out the hollow body (7) from a heated preformed (7) of thermoplastic plastic in a contoured blow mold (2a), comprising a hollow stretching rod being open at the bottom for cooling the base of the hollow body.
Process for the manufacture of a hollow body which is molded from a heated preform of thermoplastic plastic in a contoured blow mold comprising a step of cooling the hollow body by introducing a cooling medium through a hollow stretching rod, that is open at the bottom.
Dependencies are inferred from the claim text.