StackTeck

Search

  • English
  • About
    • Quality Policy
    • StackTeck Systems
      • Our Mission
      • Our Vision
      • Our Core Values
      • StackTeck Performance Benchmarks in Trade Shows
      • Industry Awards
        • In-Mold Decorating IMDA Awards
        • Leadtime Leader Awards
        • RJG Certification
    • StackTeck Automation
    • StackTeck Asia
      • Applications
      • Putting Quality First
    • Testimonials
      • Thinwall Packaging Testimonials
      • Caps & Closures Testimonials
      • Medical Industry Testimonials
      • Other High Volume Testimonials
    • Upcoming Events
      • K Show 2022
      • Drinktec 2022
    • News
    • Technology Trends
    • Videos
    • Whitepapers
      • Selecting your Mold Manufacturer
      • Improving your Injection Mold ROI
      • Prototyping Injection Molded Parts
      • How to Use Engineering Evaluation Tools
      • Stack Mold Technology
      • Keys to Building an Effective Maintenance Program for Your Injection Molds
      • Innovative Mold Technologies for Molding Cells
      • Systems Integration for In-Mold Labeling
      • IML Technology: Part Design and Tooling Considerations
      • IML Technology: Keys to Automation
      • Advances in PET Preform Molds
      • Preform Molding: Advances in Post-Mold Cooling
      • Increasing Productivity and Output with Stack Molds
    • Brochures
    • Short Clips
    • Privacy Policy
  • Applications
    • Beverage Caps
      • Carbonated Soft Drinks (CSD) Molds
      • Mineral Water Closures
      • Hot Fill Closures
      • Other Caps & Closure Molds
    • Custom Caps & Closures
      • Unscrewing Closures
      • Collapsing Core Closures
      • Bump-off Caps & Closure Molds
      • Flip-Top Caps & Closures
        • In Mold Closing (IMC)
        • Hinged Molded Closed (HMC)
        • Free Drop Closure Molds
      • Personal Care
      • Multi-Material Closures
    • PET Preforms
      • PET Preform Molds
      • PET Hot Runners
      • PET Preform Overmolding
      • Mold Cooling – KoolTrack
      • Post Mold Cooling – PiCOOL™
      • PET Mold Qualification
    • Pails
      • Pail Molds
      • TRIM™ Pails
      • Pail Lid Molds
      • Pail Robots
      • KoolTrack™ – Pails
    • Thinwall Packaging
      • Barrier Containers / Lids
      • Ultra-Light-Weight Containers / Lids
      • Horticultural
    • In Mold Labeling (IML)
      • IML Containers
      • IML Lids
      • IML Pails
    • Medical
      • PPE and COVID19 Test Kit Components
      • Medicine Cups
      • Labware / Petridishes
      • Pharmaceutical
      • Hospital Thinwall
    • Other
      • Cutlery Molds
      • Clothes Hanger Molds
      • Roof Shingle Molds
      • Flat Panels and Tray Molds
  • Products
    • FastTrack™
      • FastTrack™ IML Automation
      • FastTrack™ Terms and Conditions
    • Mold Technologies
      • Single-face Molds
      • Stack Molds
      • Injection Molds with Quick Product Change (QPC)
      • Co-Injection Molds
      • Multi-Material Injection Molds
      • Molds for TRIM Ultra-Light-Weighting
    • IML Robots & Automation
      • IML Pilot Cell
      • IML Modular Systems
    • Mold Programs
    • Mold Bases
    • Injection Mold Systems
      • Injection Mold System Integration
      • Turnkey Injection Mold Systems
  • Sustainability
    • Multiple Gating
    • Ultra-Fast Injection
    • Microcellular Molding
    • TRIM – Thin Recess Injection Molding
    • Injection Compression Molding
    • IMPACT
      • Battery Installation
      • IMPACT Initiatives – Waste
      • IMPACT Initiatives – Plastic
      • IMPACT Initiatives -Metal
  • Services
    • Part Design
    • Mold Filling Analysis
    • Part Prototyping
    • Refurbishment & Repair
    • Replacement Parts
    • Service and Training
    • Part Inspection
  • Careers
    • Company Culture
  • Contact
    • Request a Proposal
    • Call Us
    • Email Us
YOU ARE HERE: Home / News / A Unique Approach to Overmolding Cube Applications

A Unique Approach to Overmolding Cube Applications

April 14, 2021

StackTeck Systems Ltd. is pleased to announce a successful new introduction of technology for overmolding PET preforms with multiple layers.  The first overmolding system has been designed to achieve a light barrier for light sensitive applications.  The system incorporates two preform molds used in concert with a Niigon rotary cube injection molding machine, using its horizontal rotating table and dual injection units.  The rotary cube rotates 180 degrees during every cycle, bringing the first shot parts to a second cavity for overmolding the second shot.

“We are very pleased with the new system, which provides competitive cycle times while dramatically reducing the overall part weight and light blocking additives of a monolayer bottle by means of a multi-shot process.  This results in a dramatic reduction in part cost, while delivering improved light barrier properties.  We chose to work with StackTeck and Niigon, as innovative suppliers who bring state-of-the-art capabilities to high volume molding systems,” said Russell Gray, COO of Ngoc Nghia Industry.

“The StackTeck mold includes an advanced  Yudo hot runner, which helps improve our part quality with superior hot runner balance.  At the same time, the hot runner pressure drop is much lower than conventional hot runners, which enables the molding of the thin layers needed for this multi-layer part design.”  Mr. Gray continued, “It’s  an exciting technology to work with, we’ve expanded our testing to include parts with pearlescent colours in the inner layer and clear PET in the outer layer; the final parts have a glossy, “candy-apple” look that gives great shelf appeal and significant savings over a monolayer bottle with 100% blended pearlescent colours. We see opportunities for cosmetics and personal care packaging beyond the original focus on beverage packaging.”

Cube Mold as it Rotates in the Machine

 

According to Rick Unterlander, General Manager of PET at StackTeck, “This technology is distinct from traditional co-injection, because an inner layer is initially molded on one side of the cube, then rotated 180 degrees where the outer layer is over-molded.  Both molding stages operate as conventional injection molding processes, which is simpler to set up, maintain, and run continuously in comparison to a more complex co-injection system.  It’s comprised of two standard molds, with stacks designed to accurately and repeatably produce the individual layers of the preform.”

Instead of the light barrier approach, this technology can be used with significant rPET content in the overmolded shot. For some applications, up to 75% of the total part weight can be molded with rPET on the outside surface, which is much higher than some competing preform molding processes.

PET preform overmolding allows:

  • Cost reduction through
    • Isolation of non-virgin materials from product contents – regrind/flake.
    • Use of lower cost materials.
    • Reduced additive/colorant content.
  • Increased use of recycled material/rPET which addresses environmental concerns and/or government regulations.
  • The development of new approaches to applications requiring light barrier/shielding such as dairy.
  • New product differentiation.
Single Serve Dairy Bottles and PET Preforms – 250 ml

 

PET Preforms Showing Internal Light Barrier Layer

Reference Links of Interest:

Ngoc Nghia Industry’s Website

Niigon’s Website

StackTeck Contact Corporate Headquarters Canada:

Jordan Robertson
jrobertson@stackteck.com

 

© Copyright 2021 by StackTeck

 

Share

Filed Under: News, Technology Trends

Request for Proposal

Click here for an RFP from StackTeck for a benchmark tooling solution - from part design assistance and prototyping, to high-performance molds, to complete single-source molding systems.

Request an RFP     

DOWNLOAD WHITEPAPERS

Access the latest insights to get the most out of your injection molded product concepts and molding operations. Get your Whitepapers authored by StackTeck's Design and Application Experts.

Benchmark Testimonials

Beverage Caps

  • Carbonated Soft Drinks (CSD) Molds
  • Mineral Water Closures
  • Hot Fill Closures
  • Other Caps & Closure Molds

Custom Closures

  • Unscrewing Closures
  • Collapsing Core Closures
  • Bump-off Caps & Closure Molds
  • Flip-Top Caps & Closures
  • Personal Care
  • Multi-Material Closures

PET Preforms

  • PET Innovation Expertise
  • PET Preform Molds
  • PET Preform Overmolding
  • PET Hot Runners
  • Post Mold Cooling – PiCOOL™
  • Mold Cooling – KoolTrack™
  • PET Mold Qualification

Thinwall Packaging

  • IML Containers
  • Barrier Containers / Lids
  • Ultra-Light-Weight Containers / Lids
  • Horticultural

Medical Molds

  • Medicine Cups
  • Labware / Petridishes
  • Pharmaceutical
  • Hospital Thinwall

Copyright 2022 StackTeck Systems Limited. All rights reserved.