How is Moby made?
Moby is a rotationally molded product. Rotational molding,
also known as roto-molding, is a molding process for creating many kinds of
mostly hollow items, typically of plastic.
A heated hollow mold is filled with a charge or shot weight
of material, in our case it’s 100% recycled HDPE – high-density polyethylene.
The plastic we use is a combination of pre and post consumer material. The
percentage varies depending on what is available. It comes in many different
colors so we add black pigment to even out the color. The black is critical to
blocking UV as well, thus keeping algae growth to a minimum. If you have a clear
or translucent rain barrel you already know how quickly they can turn green and
start to smell. If yours is transparent we recommend you paint it to help
prevent light from entering the barrel. Krylon Fusion is one type of paint you
can use that will adhere to the plastic.
Once filled with a shot of plastic the mold is then slowly
rotated in an oven (usually around two perpendicular axes) causing the softened
material to disperse and stick to the walls of the mold. Moby’s mold is case
aluminum and is Teflon coated to help the barrel release from the mold once
complete. In order to maintain even thickness throughout the part, the mold
continues to rotate at all times during the heating and cooling phase to avoid
sagging or deformation also during the cooling phase.
Once the mold has cooled the barrel is removed and cleaned
up for shipping. The lid and barrel are actually two separate molds but the
process is the same. Any barrels or lids that do not meet our stringent quality
standards are sent to the grinder to become a rain barrel at a later time. Moby
has always been made in the USA! We strive to source local materials and labor
to bring you the very best rain barrel on the market.
Thanks for your support!
Lynn & Mike
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