TWO SHOT REDESIGN

Combines Two Components into One While Meeting Stringent Performance Requirements


Recently, Northeast Mold & Plastics was asked to review a project for a plastic container with a safety lid. At first glance, the project seemed simple enough. But after talking with our client we quickly realized the opportunity to reduce their costs while improving product quality through the repeatable process of two shot molding.

THE CHALLENGE . . . . .

The lid required strict tolerances in order to meet The Department of Transportation's specification for transporting hazardous human wastes.

THE INITIAL CONCEPT . . . .

The part was designed to use an o-ring that would be assembled to the safety lid.

THE SOLUTION . . . . .

Northeast Mold & Plastics redesigned the lid as a two-shot molded component. This design ensured a positive integral safety seal which added greater sealing force at high altitudes during transit to testing laboratories. This design also reduced two components into one and eliminated the secondary operation of the gasket.

THE FIRST SHOT . . . .

Is a TPE for the newly designed seal

THE SECOND SHOT . . . .

Is a Co-Polymer Polypropylene substrate that is overmolded onto the TPE seal with an exact consistent location

THE CHALLENGE . . . .

Developing unscrewing technology to be used in a Multi-Cavity Two-Shot Rotational Mold

 



BENEFITS . . . .

  • Low part cost
  • Reduced production time
  • Reduced handling time
  • Lower inventory costs
  • Higher quality fabrication
  • TPE seal in same position 100% of the time
  • Improved product integrity
  • Improved sealing
  • Eliminates secondary operation
  • No manual assembly required
  • DESIGN EFFORT COLLABRATION . . . .

  • R&D Engineering & Management
  • The Product Development Firm
  • Mold Manufacturer
  • Molding Machine Manufacturer
  • NEMP Plastics and Tool Design Engineering



  • To learn more about this project or to discuss a product need please contact:

    Lou Gregory
    Sales & Marketing Manager
    Phone: 860-633-1600
    Email  lgregory@nemold.com