Extrude rigid PVC three times faster.

A new mixing section called the Elongator from Randcastle Extrusion Systems Inc., Cedar Grove Cedar Grove can refer to: Locations

Cedar Grove, Alabama
Cedar Grove, California
Cedar Grove, Florida
Cedar Grove, Indiana
Cedar Grove, Kentucky
Cedar Grove, Maryland
Cedar Grove, Missouri
Cedar Grove, New Jersey

, N.J., is a spiral version of the company's fluted Recirculator mixing section. By twisting the flutes, molten material doesn't flow backward and forward Adv. 1. backward and forward - moving from one place to another and back again; "he traveled back and forth between Los Angeles and New York"; "the treetops whipped to and fro in a frightening manner"; "the old man just sat on the porch and rocked back and forth all over the flutes, but only forward, so the new version offers elongational but not distributive dis·trib·u·tive
adj.
1.
a. Of, relating to, or involving distribution.

b. Serving to distribute.

2. mixing. Both the length and degree of twist of the flutes can be varied.

In recent trials a lab-scale (1-in.-diam.) Elongator mixing screw processed rigid PVC PVC: see polyvinyl chloride.

PVC
in full polyvinyl chloride

Synthetic resin, an organic polymer made by treating vinyl chloride monomers with a peroxide. at 96 rpm, more than three times faster than standard PVC screws, which typically run at 30 rpm. The 36:1 L/D L/D Labor and Delivery
L/D Lethal Dose
L/D Lift/Drag (ratio)
L/D Low Dynamic
L/D Limiter/Discriminator
L/D Loading / Discharging Rate (shipping) test screw has three Elongator sections--in the beginning, middle and tip of the screw. A 5D section with a shallow twist is followed by two 3D sections with a steeper twist. Randcastle is scaling the screw up to 3.5 in. diam. for production of a 20% CaCO3-filled PVC profile. Tel: (973) 239-1150 * www.randcastle.com

[ILLUSTRATION OMITTED]

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Title Annotation:	KEEPING UP WITH: Extrusion
Publication:	Plastics Technology
Date:	Aug 1, 2007
Words:	161
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Topics:	Plastic products Plastics

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