B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/00 (2006.01) B29C 45/17 (2006.01)
Patent
CA 2196466
The present invention provides a process for supplying a compressed gas, which is performed in a process for producing a hollow article comprising steps of supplying a molten resin into a mold cavity formed by a pair of a male mold and a female mold and supplying the compressed gas into the molten resin in the mold cavity, wherein the compressed gas is supplied under following three conditions: (1) the compressed gas is supplied from plural gas supplying openings; (2) the compressed gas is supplied from two or more gas supplying openings simultaneously, during at least a part of the period of time when the compressed gas is supplied; and (3) during at least a part of the period of time when the compressed gas is supplied from two or more gas supplying openings simultaneously, the supplying pressure or the rate of flow of the compressed gas at, at least, one gas supplying opening differs from those at the other gas supplying openings. The present invention also provides a process for producing a hollow article using the above process.
La présente invention fournit un procédé d'alimentation en gaz comprimé, réalisé dans le cadre d'un procédé de production d'un article creux comportant la coulée de résine en fusion dans un moule formé par un élément mâle et un élément femelle et l'introduction du gaz comprimé dans la résine en fusion, en vertu duquel procédé l'alimentation en gaz comprimé répond aux trois conditions suivantes : 1) le gaz comprimé est débité par plusieurs orifices d'alimentation; 2) le gaz comprimé est débité simultanément par deux orifices d'alimentation ou plus, pendant au moins une fraction de la fenêtre d'alimentation; et 3) durant au moins une fraction de la fenêtre d'alimentation alors que le gaz comprimé est débité simultanément par deux orifices d'alimentation ou plus, la pression d'alimentation ou le débit du gaz comprimé à au moins une des orifices d'alimentation diffère des valeurs enregistrées aux autres orifices d'alimentation. La présente invention fournit également un procédé pour produire un article creux au moyen du procédé ci-dessus.
Kitayama Takeo
Matsubara Shigeyoshi
Matsumoto Masahito
Marks & Clerk
Sumitomo Chemical Co. Ltd.
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