Roto Dynamics > Services > Rotational Molding
rotational molding

Rotational Molding is a versatile process with low tooling costs and design flexibility

What is Rotational Molding?

Rotational molding is a versatile process which uses low cost tooling and engineered resins to produce functional, seamless, robust, hollow plastic products in low to high volume quantities.

The process’ versatility allows design and production flexibility, allowing you to produce multifaceted shapes with undercuts, ribbing structures, textures, colors, molded-in threaded inserts, colored graphics and polyurethane foam-filled, double wall sections.

The rotational molding process creates light weight parts that have an inherent strength that you will not find in other thermoforming processes. This includes a higher material concentration in corners and a seamless uniform structure.

Advantages of Rotational Molding:

  • Low tooling cost and quick lead times
  • Parts have good impact strength
  • Versatile design features
  • Suited to short and long production runs, 50 – 15,000 pieces.
  • No seams and stress free corners
  • Wall thickness can be changed at any stage of the process
  • Metal inserts can be molded into plastic parts with relative ease
  • Graphics can be molded into parts
  • Various colors available

Advantages of Partnering with Roto Dynamics

Our team has a reputation for being easy to work with experts in the rotational molding industry. As part of our commitment to our customers, we strive to continually improve and maintain a communicative, transparent culture. By following lean manufacturing principles and minimizing waste in the workplace, we have gained a competitive advantage which translates into customer savings and improved lead times.

Our goal is to provide customers with what they need; products on time, in full, to specification, and with uncomprimsing quality. Our estimators, designers, tool makers and production staff will coordinate with you to streamline project flow making sure that realistic expectations are set and met. Check our our Reviews.

Advantages of Rotational Molding vs Other Plastic Processes
  Injection Molding Blow Molding Thermoforming Compression Molding Extrusion Molding
Rotational Molding Advantages Lower cost tooling Lower cost tooling Lower cost tooling Hollow products can be formed
Lower cost tooling maintenance Lower cost tooling maintenance Lower cost tooling maintenance Single piece double wall construction is possible Lower cost tooling maintenance
Tooling is less complex to modify and make adjustments to Tooling is less complex to modify and make adjustments to Stress free corners More features such as molded in inserts and graphics Parts are stronger
Tooling is less complex when molding features such as undercuts hand holds Tooling is less complex when molding features such as undercuts hand holds Uniform wall thickness More complex geometry More complex geometry
Better outdoor product performance Parts are stronger More complex geometry Lower operating pressure Lower operating pressure
Lower initial setup cost More complex geometry More features such as molded in inserts and graphics Foam filling for insulation and buoyancy is feasible Lower initial setup cost
Lower operating pressure Lower initial setup cost Single piece double wall construction is possible Foam filling for insulation and buoyancy is feasible
 Larger Part size capabilities Single piece double wall construction is possible Foam filling for insulation and buoyancy is feasible
Lower operating pressure

Rotational Molding tooling

Rotational Molding Tooling

Our in house tooling maintenance capabilities allow us to keep your molds running with minimal downtime. In addition to this our tooling partners are all within the vicinity.

  • CNC machined tooling
  • Cast Aluminum tooling
  • Fabricated tooling
  • Indoor Secure Storage
  • In house tool maintenance

Equipment

Equipment used for Custom Roto Molding

A variety of manufacturing and prototyping equipment allow us to meet your needs.

  • Large format 3D Printer
  • 2 Ferry Ovens
  • SolidWorks
  • Polyurethane Foam Filling
  • High Intensity Resin Mixers
  • Internal Air Temperature Monitoring
  • Thermal Imaging
  • Precision Resin Dispensers

Materials offered for custom Roto molding

Materials offered

  • LLDPE
  • HDPE
  • Cross-link PE (XLPE)
  • Polypropylene (PP)
  • Polyurethane foam fill
  • Recycled Polyethylene

rotational molding Quality Control

Quality Control

  • CMM
  • Low Temp. Impact Testing (ARM standard)
  • Powder flow analysis
  • QA work instructions
  • Sample inspection process

We will help turn your vision into reality

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