Preform holding jig for biaxial orientation blow molding

Details Preform holding jig for biaxial orientation blow molding Preform holding jig for biaxial orientation blow molding

B - Operations, Transporting

29

C

B29C 49/42 (2006.01) B29C 49/08 (2006.01) B29C 49/06 (2006.01) B29C 49/58 (2006.01)

Patent

CA 2453289

A holding jig for such a preform formed of a synthetic resin into a bottomed cylindrical shape as is to be assembled by inserting a mouth cylinder portion to an insertion limit into the leading end portion of a cylindrical jig body having a pin inserting bore formed therethrough at its center for a drawing pinto be inserted thereinto. The holding jig comprises a support portion disposed in the inner circumference of the leading end portion of the jig body at a position to confront a peripheral projecting ridge of the mouth cylinder portion, for making such external contact with the outer circumference of the peripheral projecting ridge as to insert and extract of the mouth cylinder portion, thereby to hold the assembled posture of the preform. The holding jig can hold the preform stably in a predetermined posture thereby to achieve a high productivity for the biaxial orientation blow-molded bottle.

L'invention concerne un dispositif de serrage comprenant un corps principal tubulaire traversé par un orifice d'insertion de tige permettant l'introduction d'une tige d'étirage. La partie embouchure d'une préforme cylindrique comprenant un fond, formée de résine synthétique, est insérée jusqu'à la limite d'insertion dans l'extrémité du dispositif de serrage et fixée dans ce dernier. Une section de support permettant de maintenir en position la préforme ainsi fixée, est située sur la périphérie interne de l'extrémité du corps principal du dispositif de serrage, à l'opposé de la section de formation de bourrelets de l'embouchure. La section de support entre en contact avec la périphérie externe de la section d'accouplement de l'embouchure, de manière à permettre l'insertion/extraction de la partie embouchure. On obtient ainsi un dispositif de serrage permettant un maintien stable et solide de la position d'une préforme, grâce auquel une procédure de soufflage par étirage bi-axial à haut rendement peut être mise en oeuvre.

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