Skip to main content
DME
  • My Account
  • Find a Rep
  • Contact
  • Help
  • Global Locations

Welcome to DME! We’re here to help.

Looking for an answer? You can send a question to our support team or search our FAQs.

Need CAD data, a technical guide, or MSDS? Visit our Resources Center.

Want to purchase product? Shop the online catalog.

Interested in a career? 
View the list of available positions.



Need to contact us by phone?


  • United States - 800-626-6653
  • Canada - 800-387-6600
  • 
Europe - 32-15-215011
  • Asia - (86-775)8601-9031
  • Worldwide - 248-398-6000

Languages

  • English
  • Español
  • Products
  • Services
    • Applications Engineering Services
    • Contour Roughing Services
    • Moldflow Services
    • Hot Runner Service Center
    • Temperature Control Repairs & Calibration
    • Barrel Resleeving & Repair
  • Support
    • Customer Support
      • Request a Catalog
        • Find A Rep
        • DME Customer Satisfaction Survey
        • Share Your Feedback
      • Order Support
        • Request a Quote
        • Order Options
        • Product Pricing/Promotions
        • Shipping Options
        • Returns
        • Terms Of Sale
        • Credit Application
    • Resources
      • Shop Online Catalog
      • New Products
      • Feature Sheets
      • CAD Data
      • Digital Catalogs
      • PDF Catalogs
      • Product Documentation
      • Installation Information
      • Technical Guides
      • Application Examples
      • MSDS / SDS
      • Multimedia
      • FAQs
      • DME University
      • Webinars
      • Industry Links
    • Company
      • A New Business Model
      • A Rich History
      • Focus on Quality
      • Global Commitment
      • Global Locations
      • ISO Certifications
      • Innovative Partners
      • Testimonials
      • Events
      • News
      • Careers
    • Contact Us
    • Products
    • Services
    • Support
    • Resources
    • Company
    • Contact Us

    Resources

    Resources

    • Shop Online Catalog
    • New Products
    • Feature Sheets
    • CAD Data
    • Digital Catalogs
    • PDF Catalogs
    • Product Documentation
    • Installation Information
    • Technical Guides
    • Application Examples
    • MSDS / SDS
    • Multimedia
    • FAQs
    • DME University
    • Webinars
    • Industry Links

    I am molding Urethane, and I have trapped air bubbles mid-way in my molded part. Will Sintered Vents or Air Poppets assist me in removing those air bubbles?

    With respect to Urethane molding, Urethane is very compressible and it is possible to trap air in the Urethane resin melt back in the injection machine barrel. Through we cannot guarantee that the following suggestions will solve your molding issue, but you might consider not using suck-back during Urethane molding as this can introduce air into the Urethane melt. Another option is to adjust the back pressure to try to push any encapsulated air back-up through the hopper as you auger the pellets. Again we repeat, we make no guarantee that the above suggestions will solve your molding issue.

    Air that is encapsulated in the Urethane melt can be compressed by means of the high pressure used to inject the melt into the part cavity, effectively making the air bubbles almost disappear. Once the part begins to cool and the pressure is relieved, the air bubbles can re-appear.

    Sintered vents are used to eliminate gassing/burn marks as a result of trapped air at the flow front. This could occur at a weld line. However trapped air mid-stream in a Urethane melt would not be removed by the Sintered vent. If you are attempting to remove trapped gas at the end of the flow front, we recommend you consider machining a custom vent into your mold at that location.

    Please note that DME Air Poppets are not designed to vent gas from a part cavity. DME Air Poppets apply a small amount of air in the part ejection cycle to assist in part ejection from the core or cavity. Therefore DME Air Poppets are not recommended for removing air bubbles found mid-stream in a molded part.

    CONTACT US

    USA - 800-626-6653
    Canada - 800-387-6600
    Mexico - 442-713-5666
    Europe - 32-15-215011
    Asia - (86-775) 8601-9031
    Worldwide - 248-398-6000

    HAVE A QUESTION?

    You can send a question to our support team or search our FAQs.
    ASK NOW
    SEARCH FAQs

    GIVE FEEDBACK

    DME values your feedback. How can we make our site more useful for you?
    TELL US

     

    SIGN UP FOR DME OFFERS

    Sign-up

    CUSTOMER SUPPORT

    • Request Catalog
    • Find a Rep
    • Customer Satisfaction Survey
    • Share Your Feedback
    • Contact Us

    MY ACCOUNT

    • Sign In
    • Register
    • Order Status
    • Place Quick Order

    ORDER SUPPORT

    • Request a Quote
    • Ordering Options
    • Product Pricing
    • Shipping Information
    • Returns
    • Terms of Sale
    • Credit Application

    RESOURCES

    • Shop Online Catalog
    • CAD Data
    • New Products
    • Digital Catalogs
    • Multimedia
    • Webinars
    • FAQs

    COMPANY

    • About Us
    • History
    • Global Locations
    • Quality
    • News
    • Events
    • Careers

     

    • United States – 800-626-6653
    • Canada – 800-387-6600
    • Mexico – 442-713-5666
    • Europe – 32-15-288730
    • Asia – (86-755) 8601-9031
    • Worldwide – 248-398-6000

     

    • Mold-Masters
    • Uniloy
    • Ferromatik
    • Cimcool
    • Tirad

    Milacron Plastics Machinery

    Milacron Plastics Machinery is the only full-line global supplier across the industry’s three primary machinery applications – injection molding, extrusion and blow molding.

    Applying deep-rooted industry knowledge and expertise, we deliver advanced technology solutions to diverse customers and end markets across the globe.

    See company links below.

    2014 © COPYRIGHT DME, A MILACRON COMPANY.  TERMS OF USE | PRIVACY POLICY