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 ?
The hollow tube parison must quickly develop enough strength to maintain its shape and withstand rapid expansion against the mold by compressed air inflation without rupturing.
Furthermore, an algorithm of optimizing the parison thickness is used to reduce the final part weight while maintaining the required rigidity of the part.
Its parison-only wall thickness control has 100 point parison profile and the performance it brings to existing equipment is said to give a return on investment in months, not years.
A number of different methods have been employed in the past to measure the parison swell.
and sequential extrusion of rigid and rubber material to form a parison (SUMM Corp.
Low initial blowing-air pressure (around 40 psi) into the parison upon mold closing will help the parison flow around deep-draw areas.
The compressed air used for the blowing process should be at the minimum pressure needed to fully form the parison in the cycle.
The parison programmer uses only a small, low-flow hydraulic power unit for the servo valve to control the die gap so the hydraulic unit typically pulls less than 1 per cent of the total system power when the machine is in operation.
The simulation phases include parison formation, clamping and inflation, part cooling and shrinkage.
purchased Kautex accumulator-head machines with a version of the parison-spreader technology to stretch the HDPE parison into a long, flat rectangle.
The three-layer extrusion head produces a parison with inner and outer layers of white virgin material, and a center layer of black recycled trim material that acts as a UV barrier to protect riboflavin and other nutritional components of dairy products.
The parison swell (diameter and thickness) decreased with increasing fiber content.