Design Flexibility

• Rotational molding will provide a uniform wall thickness compared to other plastic processing methods
• Double wall construction
• Rotomolded parts have thicker outer corners which help strengthen the part.
• Designers can easily add molded inserts, reinforced ribs, kiss-off ribbing and undercuts.

Cost Savings

• Rotational molding is a low pressure process and molds are primarily a thin hollow shell that defines the outside shape and surface of the part. This results in mold costs much less than other processes

Rotational Molding vs. Blow Molding cost comparison

As the graph illustrates, Rotomolding is more cost effective for part production quanitities with less than 30,000 units. Rotomolding offers considerable cost savings for part production quanitities less than 10,000 units, creating average cost savings of $7 to $8 per unit!

Consistent Wall Thickness

• A uniform wall thickness can be maintained to within ± 20 percent, giving rotational molding tighter tolerances than blow molding.
• Rotational molding tends to produce an increased wall thickness on outside corners, which adds strength to the part. A distinct advantage over blow molding or thermoforming, which tend to produce thin outside corners. Wall thicknesses can range from 1/32 to 1 inch or more (0.8mm to 25mm).

Economical

• Plastic is lighter weight for better fuel economy and less expensive to manufacture than metal parts.
• One of the great features of rotational molding is the ability to convert large numbers of assembled components into a single functional plastic part. This not only eliminates assembly time and cost, but can also result in a more functional part with better ergonomics.

• Rotational molding is a low-pressure process, and the strength required from the molds is minimal. This results in its ability to produce large or complex parts on short notice, using low cost molds.
• The low processing pressure involved in rotational molding has the added advantage of producing parts which are relatively stress free, as compared to other high pressure processes. This advantage of the process is especially important when considering large, load bearing parts in applications which must provide corrosion or stress-crack resistance.

• Solar Plastics can design, tool and begin production in as little as 3 months. Injection and blow molding can take 6 months or more. Rotational molding can get your product to market faster and more economically than any other process.

• Due to less expensive tooling, rotational molding makes it more economical to do smaller runs on production.