Methods and apparatus for blow molding using micrograined...

Details Methods and apparatus for blow molding using micrograined... Methods and apparatus for blow molding using micrograined...

B - Operations, Transporting

29

C

B29C 49/48 (2006.01) B29C 33/10 (2006.01) B29C 33/42 (2006.01) B29C 49/04 (2006.01) B29C 49/52 (2006.01)

Patent

CA 2353838

A method and apparatus for blow molding articles having a smooth surface finish by using a mold having a surface provided with a micrograined pattern that facilitates the formation of venting passages with the surface of the parison. One embodiment of the micrograined pattern is a series of substantially circular projections (50) arranged in rows to form a network of interconnected channels (52). This network of channels (52) is connected to vent holes (56) formed in the surface of the mold.

La présente invention concerne un procédé et un dispositif pour le moulage par soufflage d'articles à surface lisse par utilisation d'un moule comportant une surface présentant des motifs microgranulaires qui facilitent la formation de passages de mise à l'atmosphère avec la surface de la paraison. Un mode de réalisation de la structure microgranulaire est une série de protubérances sensiblement circulaires (50) disposées en rangées de façon à constituer un réseau de canaux interconnectés (52). Ce réseau de canaux (52) est raccordé à des évents (56) formés dans la surface du moule.

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