Skip to main content
Sister Publication Links
  • Sustainable Plastics
  • Rubber News
Subscribe
  • Sign Up Free
  • Login
  • Subscribe
  • News
    • Processor News
    • Suppliers
    • More News
    • Digital Edition
    • End Markets
    • Special Reports
    • Newsletters
    • Videos
    • Podcasts
    • Injection Molding
    • Blow Molding
    • Film & Sheet
    • Pipe/Profile/Tubing
    • Rotomolding
    • Thermoforming
    • Recycling
    • Machinery
    • Materials
    • Molds/Tooling
    • Product news
    • Design
    • K Show
    • Mergers & Acquisitions
    • Sustainability
    • Public Policy
    • Material Insights Videos
    • Numbers that Matter
    • Automotive
    • Packaging
    • Medical
    • Consumer Products
    • Construction
    • Notable Leaders in Sustainability
    • Processor of the Year
    • Best Places to Work
    • Women Breaking the Mold
    • Rising Stars
    • Diversity
    • Most Interesting Social Media Accounts in Plastics
  • Opinion
    • The Plastics Blog
    • Kickstart
    • One Good Resin
    • Pellets and Politics
    • All Things Data
    • Viewpoint
    • From Pillar to Post
    • Perspective
    • Mailbag
    • Fake Plastic Trees
  • Shop Floor
    • Blending
    • Compounding
    • Drying
    • Injection Molding
    • Purging
    • Robotics
    • Size Reduction
    • Structural Foam
    • Tooling
    • Training
  • Events
    • Plastics News Events
    • Industry Events
    • Injection Molding & Design Expo
    • Livestreams/Webinars
    • Editorial Livestreams
    • Ask the Expert
    • Plastics News Events Library
    • Plastics News Executive Forum
    • Injection Molding & Design Expo
    • Plastics Caps + Closures: A Global Online Event
    • Women Breaking the Mold Networking Forum
    • Bioplastics Live
    • Numbers that Matter Live
    • PFAS Live
    • Plastics in Politics Live
    • PN Live: Mergers and Acquisitions
    • Polymer Points Live
    • Sustainable Plastics Live
    • Plastics Caps & Closures Library
    • Plastics in Healthcare Library
    • Women Breaking the Mold Networking Forum Library
  • Rankings & Data
    • Injection Molders
    • Blow Molders
    • Film Sheet
    • Thermoformers
    • Pipe Profile Tubing
    • Rotomolders
    • Mold/Toolmakers
    • LSR Processors
    • Recyclers
    • Compounders - List
    • Association - List
    • Plastic Lumber - List
    • All
  • Directory
  • Resin Prices
    • Resin Prices Overview
    • Commodity Thermoplastics
    • High Temperature Thermoplastics
    • Engineering Thermoplastics
    • Recycled Plastics
    • Thermosets
    • Europe - Virgin
    • Europe - Recycled
    • Europe - Feedstock
  • Custom
    • Sponsored Content
    • LS Mtron Sponsored Content
    • Conair Sponsored Content
    • KraussMaffei Sponsored Content
    • ENGEL Sponsored Content
    • White Papers
    • Classifieds
    • Place an Ad
    • Sign up for Early Classified
MENU
Breadcrumb
  1. Home
  2. News
News
October 29, 2013 02:00 AM

PSI aims at solving practical solutions

James Snodgrass
EUROPEAN PLASTICS NEWS
  • Tweet
  • Share
  • Share
  • Email
  • More
    Reprints Print

    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.

    RECOMMENDED FOR YOU
    Tennessee-based insulation maker adding equipment, jobs
    Letter
    to the
    Editor

    Do you have an opinion about this story? Do you have some thoughts you'd like to share with our readers? Plastics News would love to hear from you. Email your letter to Editor at [email protected]

    Most Popular
    1
    An 8,000-ton dream for Milacron, 20/20 Custom Molded Plastics
    2
    US Merchants opens curtain on growing injection molding operations
    3
    Report: Tekni-Plex may be for sale
    4
    Rising costs prompt delay in Corpus Christi PET plant construction
    5
    Plastics processors face automation needs, sustainability demands
    SIGN UP FOR OUR FREE NEWSLETTERS
    EMAIL ADDRESS

    Please enter a valid email address.

    Please enter your email address.

    Please verify captcha.

    Please select at least one newsletter to subscribe.

    Find more newsletters at plasticsnews.com/newsletters.

    You can unsubscribe at any time through links in these emails. For more information, see our Privacy Policy.

    Get our newsletters

    Staying current is easy with Plastics News delivered straight to your inbox, free of charge.

    Subscribe today

    Subscribe to Plastics News

    Subscribe now
    Connect with Us
    • LinkedIn
    • Facebook
    • Twitter
    • Instagram

    Plastics News covers the business of the global plastics industry. We report news, gather data and deliver timely information that provides our readers with a competitive advantage.

    Contact Us

    1155 Gratiot Avenue
    Detroit MI 48207-2997

    Customer Service:
    877-320-1723

    Resources
    • About
    • Staff
    • Editorial Calendar
    • Media Kit
    • Data Store
    • Digital Edition
    • Custom Content
    • People
    • Contact
    • Careers
    • Sitemap
    Related Crain Publications
    • Sustainable Plastics
    • Rubber News
    • Tire Business
    • Urethanes Technology
    Legal
    • Terms and Conditions
    • Privacy Policy
    • Privacy Request
    Copyright © 1996-2023. Crain Communications, Inc. All Rights Reserved.
    • News
      • Processor News
        • Injection Molding
        • Blow Molding
        • Film & Sheet
        • Pipe/Profile/Tubing
        • Rotomolding
        • Thermoforming
        • Recycling
      • Suppliers
        • Machinery
        • Materials
        • Molds/Tooling
        • Product news
        • Design
      • More News
        • K Show
        • Mergers & Acquisitions
        • Sustainability
        • Public Policy
        • Material Insights Videos
        • Numbers that Matter
      • Digital Edition
      • End Markets
        • Automotive
        • Packaging
        • Medical
        • Consumer Products
        • Construction
      • Special Reports
        • Notable Leaders in Sustainability
        • Processor of the Year
        • Best Places to Work
        • Women Breaking the Mold
        • Rising Stars
        • Diversity
        • Most Interesting Social Media Accounts in Plastics
      • Newsletters
      • Videos
      • Podcasts
    • Opinion
      • The Plastics Blog
      • Kickstart
      • One Good Resin
      • Pellets and Politics
      • All Things Data
      • Viewpoint
      • From Pillar to Post
      • Perspective
      • Mailbag
      • Fake Plastic Trees
    • Shop Floor
      • Blending
      • Compounding
      • Drying
      • Injection Molding
      • Purging
      • Robotics
      • Size Reduction
      • Structural Foam
      • Tooling
      • Training
    • Events
      • Plastics News Events
        • Plastics News Executive Forum
        • Injection Molding & Design Expo
        • Plastics Caps + Closures: A Global Online Event
        • Women Breaking the Mold Networking Forum
      • Industry Events
      • Injection Molding & Design Expo
      • Livestreams/Webinars
      • Editorial Livestreams
        • Bioplastics Live
        • Numbers that Matter Live
        • PFAS Live
        • Plastics in Politics Live
        • PN Live: Mergers and Acquisitions
        • Polymer Points Live
        • Sustainable Plastics Live
      • Ask the Expert
      • Plastics News Events Library
        • Plastics Caps & Closures Library
        • Plastics in Healthcare Library
        • Women Breaking the Mold Networking Forum Library
    • Rankings & Data
      • Injection Molders
      • Blow Molders
      • Film Sheet
      • Thermoformers
      • Pipe Profile Tubing
      • Rotomolders
      • Mold/Toolmakers
      • LSR Processors
      • Recyclers
      • Compounders - List
      • Association - List
      • Plastic Lumber - List
      • All
    • Directory
    • Resin Prices
      • Resin Prices Overview
      • Commodity Thermoplastics
      • High Temperature Thermoplastics
      • Engineering Thermoplastics
      • Recycled Plastics
      • Thermosets
      • Europe - Virgin
      • Europe - Recycled
      • Europe - Feedstock
    • Custom
      • Sponsored Content
      • LS Mtron Sponsored Content
      • Conair Sponsored Content
      • KraussMaffei Sponsored Content
      • ENGEL Sponsored Content
      • White Papers
      • Classifieds
        • Place an Ad
        • Sign up for Early Classified