Blow Molding Advantages

Other Types of Molding

• To mold plastic, you must melt it and then somehow place it into a mold. Injection molding involves squirting the plastic in, while casting is pouring the plastic into a mold. Blow molding is like injection molding as the plastic is squirted into the mold. But, the plastic is followed by an injection of air that pushes the plastic to the insides of the mold, according to Pennsylvania State University's Engineering Science and Mechanics Department. The liquid plastic keeps expanding until it covers the interior walls of the mold.

Less Expensive than Other Methods

• According to Proven Technology Inc., an industrial blow molding equipment consulting service, the blow molding technique is the least expensive of the plastic molding methods. It uses the least amount of plastic and results is little waste. The molds used for blow molding are also less expensive than other injection molding parts, according to Partner in Plastics, a manufacturer that uses blow molding techniques.

Product Versatility

• The blow molding method creates a very thin plastic product. The air injection also forces plastic material into all crevices that the mold has. These two traits make blow molding the best technique for creating complex shapes that are irregular and hollow. Proven Technologies also states that blow molding allows for a double wall within plastic products, increasing strength in the oddest shapes.

Faster Production

• The extremely thin plastic dries faster than cast molded and even other injection molded products. There is simply less material to dry. The injection is also quick because of the small amount of plastic used compared to other molding methods.