As the name suggests it is an injection molding machine which can process 2 colors of plastic material at the same time. It normally has 2 injection units which processes one material at a time. These 2 material can be injected simultaneously or at different times based on the product requirement.
A tooth brush is a fine example for the parts manufactured using these machines.
with 2 color injection molding machines we can make this part in one machine in one operation(Except the bristles, they are done in a different machine).
Two-color machine looks similar to a normal injection molding machine with the second injection unit mounted in various positions.