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Rotational Molding of a Plastic Shield Tank for the Ice Prevention Industry

Rotational Molding of a Plastic Shield TankProject description:

A customer in the ice prevention industry contracted Stern Industries to construct the plastic shield tank shown here. It was designed to hold and disperse ice and snow prevention materials onto paved surfaces. We were able to draw from our vast experience and resources to fabricate this large part using multiple processes.

Employing the low pressure rotational molding process, high density U.V. stabilized polyethylene plastic was placed into a custom designed mold specifically created for this project. The filled mold was then heated in an REI 120 oven until melted, rotating until the interior was covered in the plastic to the desired thickness. The material was cooled with air hoses, and the resulting form was detailed with secondary shaping techniques including trimming, drilling, and routing. Assembly was finished off with an applied cap, and the exterior was sandblasted for a semi-smooth finish.

The finished tank dimensions are 69.00” long x 12.25” wide x 42.63” high, and manufactured to tolerances of ±0.060”. It weighs 95 lbs. and can hold 120 gallons of material. Features of this product include molded gallon markers for easy to read tank levels, corrugated sides, and molded threaded vent risers. All dimensions were precisely met using precision metrology equipment for measuring, along with function gages to ensure correct thread sizes. We construct 75 of these tanks per year, delivered to our client in Minnesota. A typical order of this size has a 4-5 week turnaround time.

At Stern we are a leading provider of polymer components, with a reputation for providing high quality solutions of any size at cost effective rates. For more information about this custom rotomolding project or our other capabilities please see the table below or contact us directly.

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Highlights of this Molded Plastic Shield Tank Project

Product Description This shield tank is used to disperse ice and snow prevention control on paved surfaces.
Rotational Molding Capabilities Applied/Processes
Rotational Molding
Equipment Used to Manufacture Part REI 120 Oven with off-set arm
Air Hoses
Overall Part Dimensions Length: 69.00”
Width: 12.25”
Height: 42.63”
Weight: 95 lbs.
Volume: 120 Gallons
Tightest Tolerances ± 0.060”
Material Used High Density Polyethylene U.V. Stabilized Polyethylene Plastic
Material Finish Sandblasted/Semi-Smooth
In process testing/inspection performed Metrology equipment used to measure length, width, height. Use of function gages to measure threads.
Industry for Use Ice Prevention Industry
Volume 75 per Year
Features Molded Gallon Markers
  • Make it easy to read tank levels without electronic measurement
Corrugated sides
Molded threaded vent risers
Applied cap for finished product
Delivery/Turnaround Time 4-5 weeks
Delivery Location Minnesota
Standards Met Customer Specifications, 2D CAD Drawings.
ARM Standards
Product Name Cab Shield Tank

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