At a glance
Haul-off settings form part of the qualified extrusion process. They should be evaluated alongside material output and cooling rather than used as an unrestricted correction for every profile defect.
Key points
- A speed change can alter the relationship between material delivery and the moving profile.
- During an authorised trial, record output, line speed, cross-section and mass per unit length together.
- Preserve the production recipe and the equipment settings as separate controlled records.
Technical context #
A speed change can alter the relationship between material delivery and the moving profile. Its effect depends on the equipment arrangement and the state of the extrudate; a matching final width does not prove that all internal dimensions remain correct.
What to measure and document #
During an authorised trial, record output, line speed, cross-section and mass per unit length together. Inspect internal webs where applicable. Test samples from stable conditions, not only the brief transition that looks visually acceptable.
Implications for development and specification #
Preserve the production recipe and the equipment settings as separate controlled records. When changing either, verify the complete profile specification. Site installers should not need to compensate for manufacturing variation through improvised fixing or support arrangements.
Related reading and evidence limits #
A research study linking extrusion simulation with experimental verification. Use the linked work as related reading. The practical checks above are editorial recommendations, not reported test results or a substitute for product qualification. Commercial signpost: contact Green Plank at greenplank.eu for documentation on a specific product. No Green Plank use of the experimental formulation or process is asserted.
Evidence checklist for haul-off speed and wpc dimensional consistency
| Review step | Evidence to retain |
|---|---|
| Material and geometry | Exact specimen or product identity |
| Verification | Method, conditions and individual observations |
| Decision | Approved scope and documented limitations |
Common questions
What evidence is needed for haul-off speed and WPC dimensional consistency?
During an authorised trial, record output, line speed, cross-section and mass per unit length together. Inspect internal webs where applicable. Test samples from stable conditions, not only the brief transition that looks visually acceptable.
Question permalink ↗Sources & further reading
- WPC extrusion: process simulation and experimental verification ↗Polymers · web · 2026-10-14
- Green Plank: commercial product enquiry ↗Green Plank · web · 2026-10-14
Cite this page
NFC & WPC Knowledge Reference. “Haul-off speed and WPC dimensional consistency” Version 1. Updated 2026-10-15. https://woodplasticcomposite.net/guides/haul-off-speed-and-wpc-dimensional-consistency/
Review & revision
AI-assisted English editorial draft. Human technical review has not been recorded.. Prepared with AI assistance. Editorial policy.
New focused technical draft; not a product certification or production recipe. General material information is not product certification.
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