A simple calculation that tells you the consumption of PET by an injection molding machine.
The calculation is:
kg / hr = W x C x S
W = Weight of the container in kg. (e.g. 45 grams = 0.045 kg)C = Number of injection cavities S = Number of injection cycles per hour (Shots)(3,600 / Cycle Time (secs) for one set of preforms)
Example:
machine with a cycle time of 14 seconds making a 35 gram bottle
W = 0.035C = 8S = (3,600 / 14) = 257.1
kg / hr = .035 x 8 x 257.1 = 72 kg / hr