What is Rotational Molding?

Rotational molding is a thermoforming process. Liquid Sarolit™ is dispensed into the bottom half of a mold. The mold moves into a furnace and begins to rotate slowly on two axes (in two directions). The rotation ensures the plastisol coats the inside walls of the mold while the heat from the furnace “cooks” and solidifies the Sarolit™. When the mold is unbolted, the product is removed in one seamless piece.

Higher Quality Bulbs and Pumps

Some of our competitors manufacture their parts by injection molding. This process creates a two-piece product, and then the pieces are welded together. Our product is made in one piece. There are no welded seams to come apart, which is typical with injection-molded bulbs. Another significant advantage is the thickness of the part. When you have a sharp corner or angle with other types of molding processes, you will automatically have a weak area due to the thinner walls. With rotational molding, exactly the opposite is true since more material is deposited in sharp-angled or radius areas. The solid, one-piece construction also creates better vacuum draw in our suction bulb, and having no seams keeps bacteria from forming inside the bulb. This is extremely important for the ear and ulcer syringes, whose main use is clearing the breathing passages of newborn babies.