Pultruders and researchers express pultrusion costs as cost per meter of composite produced (CORDIS, project 605613). That convention is useful because it puts material, tooling, energy and people on one scale and lets you compare a profile against an aluminum or steel alternative sold by length.
The trouble is that most published pultrusion cost per meter figures arrive without the profile, resin, fiber content or line speed they were calculated on. A number stripped of those inputs cannot be checked or reused. This page gives the framework instead, so you can build your own figure and defend it.
How to use the calculator
The calculator above runs a simple per-meter model. Material cost comes from profile mass and the fiber and resin prices. Die, energy and labor costs are spread over the good meters the line produces per hour. Scrap then inflates the total, because every rejected meter still consumed material, power and wages.
Every input should come from a document: your drawing, a supplier quotation, your electricity bill or your payroll. If you type in a guess, label the result as one.
- Profile mass (kg/m): cross-section area from the drawing, multiplied by composite density. A weighed sample of a comparable profile is better.
- Fiber % by mass: from the laminate design or a burn-off test on a sample.
- Fiber $/kg: delivered price of roving from your supplier quotation. If the profile also uses mat or veil, enter a weighted average of roving, mat and veil prices by their share of the reinforcement mass.
- Resin $/kg: the price of the full mix, not neat resin. Include filler, catalyst, release agent, pigment and UV additives in proportion to the formulation.
- Line speed (m/min): the speed at which the profile cures fully in the die. Use a measured figure for a comparable profile, not a brochure maximum.
- Cavities: strands pulled through one die at the same time. Small sections and rebar often run multi-cavity; large structural profiles run one.
- Shifts: shifts per day. Shifts do not change variable cost per meter, but they set annual output and how quickly a die reaches the end of its life in calendar time.
- Uptime (%): share of scheduled hours the line runs good product. Subtract die changes, start-up and purging, cleaning, planned maintenance and breakdowns.
- Die price: from the die quotation, including spare inserts if you will buy them.
- Die life (m): total meters of profile the die is expected to produce, all cavities combined, before it must be re-chromed or replaced. If you only have a figure per cavity, multiply by the cavity count.
- kW draw: average running power of the line, not the nameplate connected load. Heaters cycle on and off once the die is at temperature, so the meter reading during steady production is the right input.
- $/kWh: your blended industrial tariff, including demand charges if they apply.
- Crew $/h: fully loaded hourly cost of everyone the line needs per line-hour, including benefits, plus a share of QC and maintenance time.
- Scrap %: rejected meters as a share of meters pulled, including start-up scrap and cut-off ends. New plants should expect it to be higher in the first months.
The cost components
The table lists every component that ends up in a pultruded profile's cost per meter, the variable that drives it and the usual levers for reducing it. On most glass-fiber profiles, material dominates; on small, fast profiles, labor and die wear take a larger share.
| Component | Driver | How to reduce it |
|---|---|---|
| Resin system | Resin chemistry (polyester, vinyl ester, epoxy, polyurethane), resin share of mass, filler level, additives | Use the least expensive chemistry the specification allows; raise fiber fraction; optimize filler level with the resin supplier; reduce bath losses with injection |
| Fiber (roving) | Glass or carbon, tex, sizing, fiber share of mass, delivered price | Specify the roving the performance requires, not more; consolidate suppliers for volume pricing; reduce creel waste at changeovers |
| Mat and veil | Number of mat and veil layers, areal weight, slitting waste | Replace mat with roving where transverse properties allow; order mat slit to width; use veil only on surfaces that need it |
| Die amortization | Die price divided by die life in meters | Run multi-cavity dies on small sections; specify chrome thickness and polish grade in the quotation; maintain the die between runs; re-chrome instead of replacing |
| Energy | Heating zones, die length, puller drive, ambient temperature, line speed | Insulate die platens; avoid long idle periods at temperature; run faster where cure allows, since heating draw is spread over more meters |
| Labor | Crew size per line-hour and meters produced per hour | Run multiple cavities or lines per crew; automate cut-off and stacking; reduce changeovers by grouping orders by die |
| Scrap | Start-up length, cure defects, dimensional rejects, cut-off ends | Stabilize process parameters before start-up; record settings per die; train operators on the installed line; set cut lengths to minimize offcuts |
| Packaging | Bundle size, end caps, protective film, crates, coils for rebar | Agree packaging specification with the customer before quoting; standardize bundle sizes |
What moves the number
Five variables account for most of the difference between one plant's pultrusion cost per meter and another's on the same profile. Test each one in the calculator above by changing it alone and watching the result.
Fiber fraction
In many formulations glass roving costs less per kilogram than the resin mix; check your own two quotations. Where it does, a higher fiber fraction lowers material cost and raises stiffness at the same time. The limit is wet-out: above a certain fraction the resin cannot impregnate the fiber fully and pull force rises.
Line speed
Speed does not change material cost per meter, but it divides labor, energy and machine time by more meters. Doubling speed roughly halves labor per meter. Speed is capped by cure, so the gain comes from resin reactivity, die heating and die length, not from turning up the puller.
Cavities
A two-cavity die doubles output per line-hour with the same crew. It also costs more and needs a puller and die station sized for it. On small sections, cavity count is often the single largest lever on labor cost per meter.
Die life
Die cost per meter is die price divided by die life. Abrasive fillers, high fiber content and poor cleaning shorten it; correct chrome thickness and maintenance extend it. Die life is quoted differently by different makers, so ask what figure they mean and what wear limit ends it.
How die length, cavity layout, steel and chrome plating affect die life and pull force. Pultrusion die design guide
Uptime
A line that runs 60 percent of scheduled hours spreads crew cost over far fewer meters than one at 85 percent. Uptime is lost to die changes, start-up purges, cleaning and breakdowns. Grouping orders by die and stocking spares are usually cheaper than buying a faster machine.
Die temperature, line speed, fiber tension and pull force, and how they lock together. Pultrusion process parameters
Why nobody quotes without a drawing
Every input in the model above depends on the profile. Mass per meter comes from the cross-section. Fiber fraction and mat layers come from the load case. Line speed depends on the thickest wall. Cavity count depends on section size and machine window. Die price depends on length and complexity.
A supplier who quotes a price per meter without a drawing has either assumed a profile you did not specify or picked a number that will change once the drawing arrives. Both waste time. A drawing with tolerances, the performance specification and an annual volume is the minimum for a meaningful figure.
- Cross-section drawing with tolerances and surface requirements.
- Performance specification: standard (for example EN 13706 class E23 or ASTM D7957), loads, fire and UV requirements.
- Resin preference or restrictions.
- Annual volume and typical order length.
- Cut length and packaging requirements.
pultruded.com does not sell finished profiles. If you are planning your own line, the same inputs size the machine and the die. Henan Zhongsheng, the manufacturer, uses the drawing to propose die layout, cavity count and puller class, and the Shanghai exporter of record issues the quotation.
What each machine band buys, and what is quoted separately. Pultrusion machine price
Questions buyers ask
- What is a typical pultrusion cost per meter?
- There is no typical figure that holds across profiles. Cost per meter depends on mass per meter, fiber fraction, resin chemistry, line speed, cavities, die life, uptime and scrap. Use the calculator with your own drawing and supplier prices instead of a published average.
- Is pultrusion cost driven mainly by material or by machine time?
- On most glass-fiber structural profiles, resin and fiber are the largest share. On small, fast profiles with low mass per meter, labor, energy and die wear take a larger share. Run both cases in the calculator to see where your profile sits.
- How do I include mat and veil in the calculation?
- Enter a weighted average reinforcement price in the fiber $/kg field, based on the mass share of roving, mat and veil in the laminate. Include slitting waste in the mat price if you buy full-width rolls.
- How is die amortization calculated per meter?
- Divide the die price by the total meters the die produces, all cavities combined, before it needs re-chroming or replacement. Ask the die maker what wear limit and maintenance their die-life figure assumes.
- Why does uptime matter so much?
- Crew, energy and die costs accrue per scheduled hour, but only good running hours produce meters. Lower uptime spreads the same fixed hourly cost over fewer meters. Die changes, start-up purges and breakdowns are the usual losses.
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