How do you calculate pultrusion line throughput?

Divide completed output by run time for raw throughput, then multiply by efficiency. With 1,200 units over 8 hours at 90% efficiency, raw throughput is 150 units/hr and effective throughput is 135 units/hr.

What is a good efficiency for a pultrusion line?

Well-run continuous lines hold 85-92% once die changes, cure stops, and scrap are counted. Below about 80%, look at unplanned downtime and cut-off reliability before blaming pull speed.

Raw vs. effective throughput — what's the difference?

Raw throughput is pieces divided by hours as if the line never stumbled. Effective throughput applies the efficiency factor, so in the example it drops from 150 to 135 units/hr — the number you should actually schedule against.

How do I increase pultrusion throughput?

Raise pull speed within the cure window, or lift efficiency by cutting die-change time and scrap. Going from 90% to 95% efficiency at 150 raw units/hr adds about 7.5 units/hr with no faster pull.

Should I schedule on raw or effective throughput?

Always effective. Scheduling on the 150 raw figure when the line truly delivers 135 leaves you 15 units/hr short every hour, which compounds into missed ship dates across a run.

Does throughput measure feet or pieces?

This calculator counts finished pieces. For continuous stock, multiply the piece rate by cut length to get linear feet per hour, which matters more when parts vary in length.

Pultrusion & Continuous Composite Profiles calculator

Line Throughput Calculator

Line throughput is how many pultruded profiles a die and pulling system actually deliver per hour once uptime and yield losses are counted. Production supervisors and pultrusion process engineers use it to schedule dies, size crew coverage, and compare a line's real output against its theoretical pull speed. Raw throughput divides pieces by hours; effective throughput knocks that down by an efficiency factor that captures die changes, resin cook-off stops, cut-off jams, and rejected sections. Because a pultrusion line is a continuous, single-die bottleneck, throughput at that die sets the ceiling for the whole cell.

What this calculator does

Line throughput is how many pultruded profiles a die and pulling system actually deliver per hour once uptime and yield losses are counted.
Use it when line throughput in pultrusion and continuous composite profiles is being committed and you need a throughput number you can defend.
It converts completed profile count and run time into a raw units-per-hour rate, then derates it by an efficiency percentage to give effective throughput.

Formula used

Raw line throughput = completed output ÷ runtime
Effective line throughput = raw throughput × efficiency

Inputs explained

Profiles pulled this shift:
Line run time:
Pull efficiency (uptime × yield):

How to use the result

Use it when scheduling a die, comparing shifts or lines, or deciding whether a speed increase or an uptime fix will move more feet.
A single efficiency number blends many loss sources; it will not tell you whether the shortfall came from pull-speed limits, die downtime, or scrap without deeper OEE breakdown.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.

Common questions

How do you calculate pultrusion line throughput? Divide completed output by run time for raw throughput, then multiply by efficiency. With 1,200 units over 8 hours at 90% efficiency, raw throughput is 150 units/hr and effective throughput is 135 units/hr.
What is a good efficiency for a pultrusion line? Well-run continuous lines hold 85-92% once die changes, cure stops, and scrap are counted. Below about 80%, look at unplanned downtime and cut-off reliability before blaming pull speed.
Raw vs. effective throughput — what's the difference? Raw throughput is pieces divided by hours as if the line never stumbled. Effective throughput applies the efficiency factor, so in the example it drops from 150 to 135 units/hr — the number you should actually schedule against.
How do I increase pultrusion throughput? Raise pull speed within the cure window, or lift efficiency by cutting die-change time and scrap. Going from 90% to 95% efficiency at 150 raw units/hr adds about 7.5 units/hr with no faster pull.
Should I schedule on raw or effective throughput? Always effective. Scheduling on the 150 raw figure when the line truly delivers 135 leaves you 15 units/hr short every hour, which compounds into missed ship dates across a run.

Last reviewed 2026-05-12.