PSI aims at solving practical solutions

James Snodgrass
EUROPEAN PLASTICS NEWS

Published: October 29, 2013 4:05 pm ET
Updated: October 29, 2013 4:06 pm ET

Related to this story

Topics Machinery, K 2013, Business News & Features

DÜSSELDORF, GERMANY — Being invisible is something of a compliment for Don Macnamara, general manager of PSI-Polymer Systems Inc.

The Conover, N.C.-based firm sees its role as "from the extruder to the die," and its innovations as practical solutions for reducing downtime and mechanical failure.

"They're innovations but they're within the heart of the machine so it's difficult to actually see them," Macnamara said. "The products that we make fit that envelope. That's where the melt pumps and the screen changers and the mixers all come in. Then we stop at the die so we're not stepping into an underwater system or something else that somebody's making."

PSI is showing several innovations at K 2013. One is a lip seal for gear pumps, seals being at the heart of PSI's business, since its formation 13 years ago.

PSI sought to address the leakage from gear pumps of low and very-low viscosity melts. Macnamara explained: "The closer the polymer gets to water, the less likely the machine is to be able to prevent that fluid from escaping past the seal. A seal ultimately wants to form against a viscous material."

Lip seals traditionally use packing seals, typically TPFE, which wear and require maintenance. The PSI innovation is the addition of a u-ring. Anything that passes the packing gland forms up into the u-ring. If it pressurizes the u-ring, it pushes the u-ring up. So the ID pushes against the spinning shaft and the OD pushes against whatever constraint it's sitting in.

It's a simple solution, but an effective one.

"To a degree it's become an OEM product because the OEMs like it so much they're putting it in their equipment and sending them out," Macnamara said.

Another seal developed by PSI is a low viscosity seal for bolt-type screen changers. The seal technology works with polymers with extremely low viscosities and has been tested on viscosities as low as 1cP (e.g. toluene) to 300,000 cP and, PSI claims, it is capable of sealing nitrogen at over 3,000 psi.

The seal can be used in any PSI piston-type screen changer unit or divert valve and, the company claims it is idea for processing high melt materials, adhesives and solvents.

A third innovation on display at PSI is a three-way divert valve allowing an automatic changeover of the melt stream from extruding to a pelletizer to extruding adhesive pillows, from the same extruder.

"Our customer wanted two through-bores. So they wanted a through-bore they could go over to feed the pelletizer and they wanted one through-bore that could go over and feed the pillow line," Macnamara explained. "So, depending on the position that they shift to, and they could fly through one, they can actually shift it over and divert the material this way, or shift it this way and the material just goes to the ground."

Macnamara said that the divert valve could be used for other extrusion applications that require a quick change-over, including profile extrusion.


Comments

PSI aims at solving practical solutions

James Snodgrass
EUROPEAN PLASTICS NEWS

Published: October 29, 2013 4:05 pm ET
Updated: October 29, 2013 4:06 pm ET

Post Your Comments


Back to story


More stories

Image

Audacious vandal stuns Taipei Plas

September 29, 2014 4:59 pm ET

Melodrama erupted at the traditionally tranquil Taipei Plas trade show on Sept. 28 when a mysterious intruder flung red paint at the Baumüller...    More

Image

Shini pushes into western China

September 29, 2014 4:28 pm ET

Despite intellectual-property brigands, Taiwan's Shini Plastics Technologies Inc. is zestfully pursuing the enormous Chinese market for plastics...    More

Image

India changes its mind, again: PlastIndia will be in Gujarat

September 27, 2014 1:37 pm ET

TAIPEI, TAIWAN — Less than five months before the opening of India's largest plastics show, PlastIndia, its organizers have decided —...    More

Image

Global giant Foxconn to make, sell molding machines

September 26, 2014 2:48 pm ET

For years, Taiwan's Foxconn Technology Group has been the world's largest contract manufacturer for electronics, with more than 1 million employees...    More

Plastics Machinery Group now offering injection presses

September 26, 2014 10:46 am ET

Solon, Ohio-based Plastics Machinery Group is expanding its machinery offerings by adding injection molding machines to its inventory and adding a ded...    More

Market Reports

Plastics in Mexico - State of the Industry Report

This report analyzes the $20 million dollar plastics industry in Mexico including sales of machinery & equipment, resins and finished products.

Our industry analysis highlights macro industry trends and micro trends faced by companies that do business in Mexico. The report also provides key industry statistics and forecasts to anticipate future industry expansion.

Learn more

Plastics Caps & Closures Market Report

The annual recap of top trends and future outlook for the plastics caps & closures market features interviews with industry thought leaders and Bill Wood’s economic forecast of trends in growing end markets. You will also gain insight on trends in caps design, materials, machinery, molds & tooling and reviews of mergers & acquisitions.

Learn more

Injection Molders Market Report & Ranking 2014

This special package contains our 132-page 2014 Market Report on the Injection Molding segment and our exclusive 2014 RANKINGS database of 500+ Injection Molders for a discounted package price.

Learn more

Upcoming Plastics News Events

January 14, 2015 - January 14, 2015Plastics in Automotive

February 4, 2015 - February 6, 2015Plastics News Executive Forum 2015

June 2, 2015 - June 3, 2015Plastics Financial Summit - Chicago 2015

September 16, 2015 - September 18, 2015Plastics Caps & Closures - September 2015

More Events