The rotational molding process is a commonly used manufacturing method for many items that we all use on a daily basis. Some good examples would include bulk tanks, canoes, kayaks, helmets, soccer balls, playground equipment, dumpsters, and dumpsters.
Another name for the rotational molding process is rotational molding or rotational molding. It is one of those processes that people take for granted and hardly ever notice. However, it includes many products that we all use and enjoy.
In the past, rotational molding was very slow and had very limited application. With the more and more advanced technologies in modern industry, it has become more efficient and has a wider application area.
What plastics can use the rotational molding process?
The main plastic used is the polyethylene family of plastics; PE, HDPE, LLDPE and HDPE. Some other plastics used in rotational molding include nylon, PVC, and polypropylene.
Why is it called rotational molding process?
It’s called a rotational molding process because the mold rotates! It actually rotates on two axes. This is to allow the plastic to be evenly distributed over the casting surface of the mold. In the rotational molding process, a predetermined amount of plastic powder is placed in the mold and heated to its melting point. The mold is then rotated on two axes, which spreads the molten plastic over the face of the mold.
Are special molds required?
Most rotomolds are fairly simple, especially compared to injection molds. When you consider that the finished product is a trash can or a kayak, it’s understandable that the fit and finish need not be as exact.
Rotomolding design faces a number of different hurdles than a typical injection mold, and these need to be taken into account. A good example is the difficulty the rotational molding process faces when trying to fill in very detailed areas. Because the rotational molding process uses high heat and low pressure, it can be quite limiting in your ability to fill corners and other hard-to-fill areas.
Is there a future in the rotational molding process?
Yes, there is certainly a future for rotational molding. The kind of products typically produced by the rotational molding process are the kind of things that never go out of style. Can you imagine the world without green trash cans or a playground without a plastic slide? Companies that embrace this low tech/high tech will no doubt experience job openings.
