Title:
APPARATUS FOR MANUFACTURING HEAT SET HOLLOW PLASTIC VESSELS
Document Type and Number:
WIPO Patent Application WO/1989/001400
Kind Code:
A1
Abstract:
In an apparatus for manufacturing thermally set plastic vessels according to the present invention, a metal mold which is heated to and kept at a heat setting temperature is used, and a hot air supply and discharge passage communicating with a preform is provided between the outer circumferential surface of a stretching rod and a mandrel, a cold air supply passage, which communicates with the interior of the preform, being provided in the interior of the stretching rod. A hot air supply and discharge mechanism and a cold air supply mechanism are provided in these passages via switch valves or change-over valves. According to the present invention, the hot air is supplied to the interior of the preform simultaneously with the starting of a preform stretch-blow molding operation, to carry out the stretch-blow molding and heat setting of the preform with the above-mentioned valves controlled suitably. After the preform has been heat set, the hot air is discharged, and the cold air is then supplied to cool the molded vessel. According to this invention, the stretch-blow molding of a preform, the heat setting of a molded vessel, and the cooling of the heat set vessel for the purpose of taking out the same from the mold are carried out in a single metal mold as a sequence of operations without a loss of time.
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Inventors:
TAKAKUSAKI NOBUYUKI (JP)
MIZUTANI YOHJI (JP)
KISHIDA NOBUHIRO (JP)
HOSOKAWA MANABU (JP)
MIZUTANI YOHJI (JP)
KISHIDA NOBUHIRO (JP)
HOSOKAWA MANABU (JP)
Application Number:
PCT/JP1988/000668
Publication Date:
February 23, 1989
Filing Date:
July 04, 1988
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD (JP)
International Classes:
B29C49/42; B29C49/64; B29C33/02; B29C33/26; B29C35/02; B29C35/08; B29C49/06; B29C49/12; B29C49/36; B29C49/48; B29C49/56; (IPC1-7): B29C49/30; B29C49/64; B29C49/12; B29C49/58
Foreign References:
| JPH05993330A | ||||
| JPH06233622A | 1994-08-23 | |||
| JPS57140127A | 1982-08-30 | |||
| JPS51101070A | 1976-09-07 |
Other References:
See also references of EP 0328653A4
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