Thermoformed Plastics Solutions Blog

Benefits of Closed Molding for Applications in Transportation

Posted by Jeffrey Geiman on Aug 14, 2014 11:03:00 AM

The process of “closed molding” composite parts provides many benefits for a wide range of applications in the transportation industry. 1

At McClarin, the closed molding process includes three major methods: Resin Transfer Molding (RTM), Light RTM (LRTM) and Vacuum Infusion Process (VIP).

Light RTM and Vacuum Infusion are closed molding processes often used by McClarin for Transport Applications.

Advantages are based in the fact that very large parts, of medium volume runs can be accomplished at low project costs. These processes also allow for laminate designs that target structure, low weight applications for interior and exterior component applications.

Close-Molding-Truck-BodyBoth processes include glass fiber laid or packed into the mold. The mold is then clamped (LRTM) or bagged (Infusion) and a resin is pumped/infused in under pressure vacuum.  Once all of the air within the mold has been displaced with resin the cure cycle begins. This rather simple approach allows for very large intricate molds to be made with very low tooling costs. With the addition of gel coats, finished parts may require only minor trimming for a finishing step.

The Benefits of Closed Molding Components

  • They are durable and offer high performance.
  • They can adhere to strict guidelines pertaining to toxicity, flammability, smoke emission, etc.
  • They can be custom designed and engineered
  • They are affordable from an overall project spend comparison.
  • Fast production for quicker product availability.

Closed molding has been used in the transportation industry for decades. Throughout the years, mold designs have been enhanced, as well as product engineering, resulting in a better finished product. Regardless of what kind of transportation component you are looking for, closed molding products should be given consideration as they can provide high quality results and may be best suited for the application.

If you are interested in learning more about the closed molding process or if you’d like to discuss your upcoming project with a designer engineer, contact the experts of McClarin Plastics today and ask to speak with one of our experts.

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Topics: transportation, closed molding, transportation industry