B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/64 (2006.01) B29B 13/02 (2006.01) B29C 33/02 (2006.01) B29C 35/08 (2006.01) B29C 49/06 (2006.01)
Patent
CA 2221531
A preform heating method for heating a preform for a stretch blow molding is executed by an apparatus which comprises an outer heating die having a cavity for the preform, a thermal-insulating pot surrounding the outer heating die and a high-frequency heating unit installed around to the thermal-insulating pot. The heating of the preformed is executed by locating the heating die around the preform, applying alternating magnetic flux to the heating die to heat the preform through the heating die, and controlling the magnitude of the alternating magnetic flux to control the temperature of the preform.
Cette invention concerne une méthode de chauffage d'une préforme à mouler par soufflage bi-orienté, méthode réalisée au moyen d'un appareil comportant une filière chauffante extérieure dont la cavité reçoit la préforme, un pot thermo-isolant autour de ladite filière et élément de chauffage haute fréquence disposé autour du pot thermo-isolant. Le chauffage de la préforme est réalisé par la filière chauffante à laquelle on applique un champ magnétique alternatif dont l'intensité est adaptée selon l'élévation de température souhaitée.
Suzuki Tatsuo
Uchiyama Mikio
Robic
Tahara Machinery Limited
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