Injection molding is one of the most widely used manufacturing processes in use today. Injection molds are used to create many things in regular use, such as containers, bottle caps, automotive parts, and displays, the list goes on and on. So what makes it so popular? Let’s take a brief look inside the process.
Material, in the form of pellets, or granules are fed through a hopper into a heated barrel, melted, and then forced into a mold by a reciprocating screw, where it is allowed to cool into the desired shape. (see video below).
One of the clear advantages of injection molding is the fast production time. Once a mold has been designed (the expensive part) and depending on how many impressions are in the tool, the cycle time can be anywhere from 15-30 seconds, which allows for high production runs, repeatability, and low labor costs due to the fact that there is little need to finish parts after the molding process.
It also allows for greater flexibility in the materials that you use. There are literally thousands of different polymers to choose from, the material selected will depend on the strength and function of the final part.