Sponsored By


May 1, 2000

2 Min Read

Booth S-772

What's Hot! Glycon will be showcasing a range of new screw designs to meet various needs.

* For container molding and other applications requiring maximum throughput, Glycon will show both parallel barrier and variable-pitch barrier screws. High shear energy input from the barrier flights is said to yield higher melting rates.

* In addition, the company has exclusive rights to the Barr E.T. Screw for injection molding. The E.T. screw design features a combination of variable-depth channels and undercuts. The undercuts are said to be large enough to allow both melted resin and unmelted pellets to pass over them. As material is repeatedly transferred from one channel to another, the energy already in the melt is used to heat the unmelted pellets without introducing excessive shear pressure or heat.

The low shear (25% less than typical barrier screws) characteristics have been effective in reducing splay problems in polycarbonate blends often used in automotive applications.

* For those interested in molding color or engineering resins, on display will be the UniMix screw design, which is said to provide effective mixing and melting for delicate polymers without introducing too much shear.

* Also in collaboration with Robert Barr, Inc., as well as with producers of engineering resins, Glycon has developed new mixing devices that are said to adapt the cavity transfer mixer (CTM) concept used in extrusion, to function in injection molding. A CTM operates by forcing material between a series of hemispherical pockets in both the screw (rotor) and the barrel (stator). But because the stator in the CTM is an integral part of the extruder barrel, it is limited to continuous extrusion.

Glycon's Infuser and the Barr BMR use a 'dynamic' stator, either a sleeve or a series of rings that are part of the screw, to achieve the same kind of high-intensity, low-shear mixing action required for extrusion or reciprocating screw applications.

* An alternative to ring-check and ball-check valves will also be on display. The QSO (Quick Shut-Off) Valve has a poppet used in place of a ball to provide several advantages. First, the poppet is self-centering and its travel is limited to a back-and-forth motion and a streamlined flow path. Generous material entry ports at the rear of the valve, along with smooth, evenly spaced axial grooves on the poppet, allow material to move freely.

Cool Booth Details Company will provide a virtual tour of its manufacturing facilities. Circle 287

Booth Personnel Bill Merritt, Jon Kuhman

Key Contact Bill Merritt, VP Sales & Mktg. ­ Tel: 517-423-8356; Fax: 517-423-7470;
E-mail: [email protected];
Web Site: www.glycon.com 

Sign up for the PlasticsToday NewsFeed newsletter.

You May Also Like