METHOD AND APPARATUS FOR PRODUCING HEAT AND PRESSURE-RESISTANT SELF-SUPPORTING CONTAINER

PURPOSE: To prevent the heat creep phenomenon of a bottom part at a time of heating and sterilization by forming the bottom part of the molded body of a preform into a dome shape to form a secondary molded body and heating the bottom part and a part of the body part of the molded body by an infrared...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAMAKI SETSUKO, TAKEUCHI KIMIO, KATO NOBUYUKI, IKEGAMI HIROO, MATSUNO KENJI, MARUHASHI KICHIJI
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE: To prevent the heat creep phenomenon of a bottom part at a time of heating and sterilization by forming the bottom part of the molded body of a preform into a dome shape to form a secondary molded body and heating the bottom part and a part of the body part of the molded body by an infrared radiator to shrink the same and setting the bottom part to a size received in a semispherical plane to perform secondary blow molding. CONSTITUTION: The neck part of a preform is supported by a core mold 34 and a fluid is blown into the preform to form a secondary molded body 30. Next, the bottom part 38 and a part 39 of the body part of the secondary molded body 30 is heated by infrared heaters 42, 43 in a heat treatment process to obtain a tertiary molded body 40 wherein the bottom part 38 and a part 39 of the body part are shrunk. In this case, the bottom part 45 and a part 46 of the body part are set to a size wherein the trough bottom part of a final container is received in an imaginary semispherical plane 60 and formed into a shape relatively approaching the semispherical plane 60. Next, a fluid is blown into split molds 52 to perform secondary blow molding to form the bottom shape of the final container equipped with trough parts and foot parts by a bottom mold 5.