parison

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parison

[′par·ə·sən]
(engineering)
A hollow plastic tube from which a bottle or other hollow object is blow-molded.
References in periodicals archive ?
Since the polyolefin modified resin is resistant to necking, much larger parisons, and hence parts, can be molded from this resin.
Static can have a serious effect on parison alignment, with a particularly high concentration of static being able to cause the parisons on the blow moulding lines to swing out of place.
He continued: "High levels of static can have a serious effect on parison alignment and therefore container quality, so it became a priority to find a solution that would ensure all traces of static would be eliminated.
The longer parisons change the positions of important program points and the result can be containers that are out of specification.
4 was identified to be too simplistic, due to the complex shape of the extruded parisons created by VWDS/PWDS die gap manipulations.
Features: Continuous operation to 8 rpm, single or dual parisons, 100-point parison programming, 7-layer capability, aseptic capability.
To this end, parisons were extruded for incremental times up to the total extrusion time.
Trends point to more construction uses for large plastic panels and to non-round parisons, enabling even larger panels.
Designed to dramatically reduce non-viable particulate generation in the parison extrusion zone, the KleenKut is a new patented method for cutting the molten parisons during the blow/fill/seal process.
Parison wall uniformity has been good and parisons up to thirty-six inches in length have been extruded without excessive sag.
The LGF/HDPE parisons did sag as a solid-body (equal speed at different axial locations) governed by the orientation caused by the flow in the die.