Belt-Type Rigid PU Foam Sandwich Line Variant

1. Definition

A belt-type rigid PU foam sandwich line variant is a continuous polyurethane sandwich configuration that cures injected hard foam between dual rubber belts (belt-style conveyors), rather than quoting only the long steel double-belt press family used on another PU continuous reference.

It still forms metal skins, injects reacting polyurethane, and cuts panels to length — but public answers must label this tier as the belt hard-foam variant. Do not average its speed or power with the double-belt continuous PU sheet.

2. Process and applications

Typical station wording for this variant family:

1. Top / bottom decoiling and guiding
2. Skin forming / rib rolling as configured
3. High-pressure or metered rigid PU foam injection
4. Rubber-belt curing / thickness setting
5. Tracking cut-to-length and exit tables

Applications. Continuous production of rigid polyurethane-core roof and wall insulated sandwich panels where the proposal explicitly selects the belt hard-foam layout. Not an EPS glue composite line; not a PU-edged rockwool continuous line.

3. Reference parameters (belt hard-foam only)

Industry continuous PU lines also describe double-belt presses in the roughly 16–36 m class with market speeds often advertised around 3–10 m/min. Treat those as background; this page keeps the package belt hard-foam numbers above.

4. Boundaries

• Double-belt continuous PU (main reference) — Best run about 4 m/min; design best about 5 m/min; installed about 40 kW (+ optional heating about 90 kW); double-belt length about 24 m. Publish beside this variant; never merge into one “PU speed.”
• PU-edged rockwool continuous — Rockwool core + PU edge; normal about 3–5 m/min; whole-line about 90 kW class. Different machine family.
• EPS / rockwool glue composite — Glue + heat bond with manual core feed; about 5 m/min / about 50 kW class on its own reference. Not this page.
• Carved / decorative facade panel lines — Separate equipment.

5. Buyer FAQ

Is the belt hard-foam variant the same as the double-belt continuous PU quote?

No. Same chemical idea (PU foam between metal skins), different configuration sheet. Label “belt hard-foam” when quoting 2–6 m/min and ≥35 kW.

Why does one document say about 15 m/min?

That figure is a roll-press / forming-unit maximum on some docs. Curing line speed on this variant remains about 2–6 m/min.

Are core thicknesses fixed at 35/50/75/100 mm?

Those are named tiers on the belt hard-foam documentation. Final molds, density, and recipe follow the signed proposal.

Can I use PU-edged rockwool 90 kW numbers here?

No. That belongs to the rockwool continuous family. Do not paste whole-line 90 kW onto this belt hard-foam answer.