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Rotational Molding (Roto Molding)

Rotational Molding is a manufacturing process that creates low stress, hollow parts.  This process is ideal for plastic parts with low to medium run quantities (50 to 5,000+ depending on size) due to the relatively low tooling costs when compared to other methods.  Rotational molded parts are noted for their strength and consistent wall thickness.

Rotational Molding is a plastic forming method that converts plastic resin into a hollow mass through high temperature rotation which coats the interior of a mold (tool) to the desired exterior form.  This is why the process is called "rotational molding" - the mold (tool) rotates on all axes throughout the entire heating process and continues through the rotation until cooled.  

Unlike other plastic molding processes (such as Thermal, Injection or Blow Molding), Roto-Molding results in a much more durable and flexible product with seamless and consistent wall thickness. This molding process also distributes more material to corners and edges than other molding methods to help absorb shock and stress where they occur most.  Since the material isn't stressed during the roto-molding process, the finished product is stronger, more flexible and less susceptible to cracking.

Rotational Mold Tooling is much more cost effective for low to medium run parts, as well as large format parts, than other molding methods.

 

 

Wondering if Rotational Molding may be a good application for your next project?  Please contact us, we would be more than happy to discuss it with you.  contact Rhino, Inc.Request for Quote

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Rotational Molding (ROTO MOLDING) - Capabilities

General Capabilities Contract Manufacturing
Custom Design and Engineering
Large Parts - up to 17 ft in spherical diameter
Small Parts - down to 2" Spherical Diameter
Complex Geometries
Tight Tolerances - .030 per Inch (3%)
Mold-in Insert applications
Mold-in Graphic applications
Drop Foam applications
EPS Foam applications
Sub-Assembly applications
Industry Focus
Aerospace
Agricultural
Automotive
Bulk Storage
Construction
Marine
Industrial
Enclosures
Floor Scrubbing Machines
Food/Chemical Containers
Recycling and Refuse Containers
Sporting Goods
Industry Standards AS-Compliant - Aerospace Industry Standard
ISO-Compliant - International Organization for Standardization
Mil-Spec-Compliant - Military Specifications
Materials
MDPE
HDPE
Nylon 11
Nylon 12
LLDPE
PVC
Cross-Linked PE
Super Linear Polyethylene
Post-Consumer resins
Molding Process Rotational Molding (Rotomolding)
Molded Product
Advertising Specialties
Bellows
Bins/Trays
Bottles
Bumpers
Buoys
Cases
Chutes
Commodity Parts
Containers
Covers
Dock Wheels
Dumpsters
Enclosures
Fan Cones
Fan Shrouds
Floats
Furniture
Gratings
Housings
Kayaks
Floating Dock Systems
Large Bins
Manifolds
Medical Housings
Molded Shapes
Pallet
Panels
Protectors
Sailboat Hulls
Sculpture Art
Sleds
Sleeves
Tanks
Toolboxes
Toy Parts
Production Volume
Min
1 unit
Max
2,500 units
Per Mold

Specialty Production Shop
Low Volume
Small/Short Run
High Volume
Large Run
Long Run
Large Scale Production Volume Run
Additional Services Provided

Design & Production Teams
In-House Tooling               Secondary Assembly
Secondary Foaming                   CNC Trimming 
Storage & Distribution                        Quality & Customer Service

Molding Spherical Diameters
Min
2 in
Max
17 ft
Material Run Wall Thickness
Min
0.060 in
Max
0.625 in
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