Research
Clamping force a mold needs
A mold needs 2 to 5 tons of force per square inch of the part's outline. More adds nothing.
Industry source
Resin suppliers' processing guides
What a smaller press must fit
A smaller press must also have room for the mold and hold enough plastic for one cycle.
Industry source
Press manufacturers' specification sheets
Small shots in a large barrel
Plastic waits longer in the barrel of a large press between small shots, and heat can spoil it.
Industry source
Resin suppliers' processing guides
Power use by press size
A larger press draws more power every hour it runs, whatever the mold in it.
Our estimate
Our estimate, from the motor and heater sizes press manufacturers publish