Rotational molding, or rotocast/rotomolding, is a specialized and unique process that uses catalytic cure to solidify a material and fusing the resin together in an enclosed silicone mold.
Rotational molding is used to manufacture hollow plastic products. It is commonly used in the manufacturing of tanks, but many developers have begun using the technology to make a wide variety of different plastic parts.
Mina Product Development uses two part component polyurethane resins. After pouring the resin/material into the mold, the mold is simply rotated on a two axes arm at a slow speed until cured.
Rotational Molding Products
Basic Steps of Rotational Molding
- Begin by introducing a select amount of plastic into a hollow, shell-like mold.
- The mold begins to heat while being simultaneously rotated about two principal axes. This is so the plastic within the mold adheres to and forms a layer inside, against the inner surface.
- The mold continues to be rotated during the cooling phase so that the plastic retains the mold's shape as it hardens.
- Once the mold rotation is stopped you are then able to proceed with the removal of the plastic product from the mold.
What are the benefits?
As long as rotational molding has been around (over 100+ years in some forms!) it has proven itself to be a versatile manufacturing method for plastic parts. Over the past several decades it has evolved to encompass many industries and successfully met the needs of demanding marketing sectors.