The mold is placed into the machine. On one end of the machine there is a reciprocal screw in a heated barrel. The plastic is fed into the barrel, which in turn feeds it into the screw. The first section of the screw holds the plastic together so that it starts to melt. Moving a little further up, the threads on the screw become thinner. This because the barrel is heated and the pieces of plastic are being pushed together and rubber together, the plastic melts. At the tip of the screw there is a piece which holds the plastic in place until enough plastic has been stored to push into the mold and complete the mold. Now that the plastic has been melted, it needs to be injected into the mold before it hardens and dries. Using a hydraulic push, the machine pushes the screw forward at up to 300 psi, blasting the plastic into the mold at an immense rate. Finally, when the product has been cooled, it is removed from the machine.…