Estimate continuous extrusion throughput or line speed for film, sheet, tube and rod geometry using mass output = cross-sectional area × line speed × density, with consistent units. Preset densities are approximate. Choose Cyclic output for the separate mass-per-cycle model described below.
Output Rate (kg/h) Formula
The following formula applies to the calculator’s Cyclic output mode: mass per cycle divided by cycle time. It is separate from the continuous film, tube and rod geometry modes.
Variables:
- O is the output (kg/hour)
- SW is the shot weight (grams)
- CT is the cycle time (seconds)
To calculate the output rate, divide the shot weight by 1000 to convert it to kilograms, then multiply by the number of cycles in an hour (3600 seconds divided by the cycle time).
What is Output Rate (kg/h)?
Output rate is the mass of material produced per unit time, commonly expressed as kilograms per hour (kg/h). In a cyclic process, the output rate is determined by the mass produced each cycle (shot weight) and how long each cycle takes (cycle time). Continuous extrusion throughput is also measured in kg/h, but it generally depends on factors like screw design, material, temperatures, and screw speed, and is not typically calculated from “shot weight” and “cycle time.”
How to Calculate Output Rate (kg/h)?
The following steps outline how to calculate the output rate.
- First, determine the shot weight (SW) in grams (mass produced per cycle).
- Next, determine the cycle time (CT) in seconds.
- Use the formula from above: O = (SW / 1000) * (3600 / CT).
- Finally, calculate the output rate (O) in kilograms per hour.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
shot weight (SW) = 150 grams
cycle time (CT) = 30 seconds
