Process and apparatus for the production of a hollow body of...

Details Process and apparatus for the production of a hollow body of... Process and apparatus for the production of a hollow body of...

B - Operations, Transporting

29

C

B29C 49/30 (2006.01) B29C 33/22 (2006.01) B29C 49/56 (2006.01)

Patent

CA 2053484

A process and apparatus for the production of hollow bodies from thermoplastic material by means of blow molding uses a blow molding mold which comprises at least first and second mold portions to enclose a generally tubular extruded preform which is expanded within the mold under the effect of an increased internal pressure within the preform. To provide for asymmetric closing and/or opening movements of the mold portions relative to the preform, the blow molding mold is displaced as an entirety parallel to the direction of the opening and/or closing movements of the mold portions, more especially during the mold closing and/or opening procedure, so that an additional motion is superimposed on the movements of the mold portions.

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