Importance

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Abstract

A mold assembly for blow molding comprises mating mold components having molding surfaces comprising a segment of at least one mold cavity, the mold cavities defining a plurality of containers arranged so as to permit substantially simultaneous blow molding of plural containers from a single tubular parison. In alternative configurations, the molding surfaces define (i) at least one cavity defining two containers joined by the neck portions thereof and each mold component comprises a single insert comprising molding surfaces for the neck portions of the joined containers, and (ii) at least two separate cavities at least one of which defines a single container and each mold component comprises inserts comprising molding surfaces defining the neck portions of containers defined by each cavity. Means for pressurizing the parison comprise means for piercing the parison wall. A blow molding machine comprises a press mechanism for operating a mold assembly in accordance with the invention.

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First Claim