Rotational Molding Benefits

Posted on: January 9th, 2012 by admin

Process Definition:

Rotational Molding is a high temperature, low pressure, open molding plastic-forming process that uses heat and biaxial rotation to produce hollow, one piece parts.

The Rotational Molding process is an economical method of producing seamless, one piece, hollow parts with complex shapes that would be costly or impossible in other plastic processes.

Advantages/Pros:

• Can produce small or large parts from a few inches to over 20 feet
• Weight Reduction – Corrosion Resistance
• Produces complex geometrics in a single seamless part
• Economical Tooling/Shorter Lead Times
• Stress free, low pressure molding process
• Allows molded threads and mold in inserts
• Low residual stresses
• Suitable for both low volume and high volume production runs

History:

As far back as 1855, R. Peters of Britain documented the first use of biaxial rotation and heat.This rotational process was used to create metal artillery shells and other hollow vessels.

Plastics were introduced to the rotational process in the early 1950s. This led to the creation of plastic toys, road covers, marine buoys, storage tanks, bins, boats, airplane parts and transportation parts.

Limitations:

• Slow Production Speed
• Limited Material Choices

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