How Advanced Rotational Molding Makes Toter Carts Superior
Toter's engineers and designers developed and patented a revolutionary breakthrough in rotational molding known as Advanced Rotational Molding to create The World's Toughest Carts™.
The process eliminates built-in stress, weakness, and brittleness associated with injection molded products. In addition, Toter’s use of linear medium density polyethylene (MDPE), which is specifically engineered for toughness and high impact resistance, creates a stronger cart than injection molded carts made with high density polyethylene (HDPE) which is rigid, brittle, and offers poor impact resistance.
Roto molding cart advantages vs. injection molded carts:
- Superior toughness and durability
- Single-piece product design – no seams
- Consistent wall thickness
- Stress-free, zero-pressure product
- Unique design and structural capabilities like Rugged Rim, sealed stop bar journals, and granite finish
- UV stable
- Custom colors
- Corrosion- and chemical-resistant
- Ability to mold in graphics
The Advanced Rotational Molding Process
Rotational molding, also known as rotomolding, is the process of making hollow plastic products by placing powdered resin into a mold and rotating the mold bi-axially in an oven until the resin melts and coats the inside of the mold. The mold is then cooled and the finished product is removed from the mold.
The process of manufacturing Toter carts (and other Toter products) begins when molds that are mounted to each arm of the machine are filled with a pre-measured amount of plastic micro-pellets. Molds then move into the oven where a microprocessor controls the temperature, blower velocity, bi-axial rotation, and molding cycle. The oven melts the plastic material while the arms rotate, allowing the plastic to coat the inside of the mold. This method of heating and molding requires no high pressure hydraulic equipment to fill the mold so no stress is introduced during the molding cycle.
Next, the mold moves to the cooling chamber where curing takes place. The microprocessor controls the cooling cycle to optimize the impact strength and performance of the final product. The mold temperature is brought down slowly through air cooling and water cooling.
After the molds have cooled and the cart has cured to achieve its maximum impact strength and physical properties, it is removed from the mold. The cart is trimmed and final imprinting and assembly completes the cart.