Shot weight calculation
Find the part and shot weight from part volume and raw material density; see how much of the machine’s shot capacity you are using.
What is this calculation used for?
Finds the part and shot weight, and how much of the machine’s shot capacity is used. Quality problems arise if the shot capacity is used too little (below about 20%) or too much (above about 80%); this calculator lets you check that range when selecting a machine.
Loading calculator… (JavaScript required)
How is it calculated?
- Part weight = volume × density
- Shot weight = (volume × cavity count + runner volume) × density
Other calculators
Clamping force calculation
Required clamping force and machine size from projected area and cavity pressure.
Mold opening stroke calculation
Minimum opening stroke required from part height, runner and robot clearance, distinguishing toggle and direct hydraulic (two-platen) machines.
Raw material residence time in the barrel
Melt residence time in the barrel, from barrel capacity, shot weight and cycle time.
Hourly masterbatch consumption for injection molding
Hourly, shift and monthly masterbatch requirement from shot weight, cycle time and dosing ratio.