-What is the difference between injection molding vs. blow molding
Injection molding uses a piston or screw to force plastic resin thru a heated tube into a mold. The plastic cools and hardens taking the shape of the mold. The mold is opened and the final product is removed. The advantages of injection molding are high production rates, design flexibility, repeatability, low labor costs, and minimum scrap. The disadvantages of injection molding are the initial investment in molding machines.

Blow molding involves a mold being fitted around the outside of a softened thermoplastic tube, and the tube is heated. Next, air is blown into the softened tube to force the outside of the softened tube to conform to the walls of the mold. After the plastic cools the mold opens the final product is removed. The advantages of blow molding are equipment availability and it is possible to save tooling dollars vs. injection molding. The disadvantages of this process are cycle times are slower than injection molding and piece prices are often times higher than injection molding.