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Function of Cold Press in Plywood Production: When You Need a Cold Press Section
2026-06-17 13:55:27

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Function of Cold Press in Plywood Production: When You Need a Cold Press Section
Many new plywood mill owners wonder: with hot press already purchased, is cold press still necessary? In modern plywood lines, cold press is pre-pressing equipment and cannot replace hot press. It ensures smooth workflow and better panel quality.
After gluing and layup, veneers form loose panel mats. Veneers can easily shift or fall apart during transportation. Cold press applies pressure at ambient temperature for pre-pressing. After cold pressing, veneers stick lightly and form solid mats for loading into hot press.

Core benefits of cold press

  1. Avoid mat breaking and shifting: Pre-pressing stabilizes mats, reduces veneer sliding during loading and minimizes misalignment defects.

  2. Improve hot press efficiency: Pre-pressed mats have uniform thickness, heat evenly inside hot press, shorten pressing cycle and raise hot press utilization rate.

  3. Reduce glue waste: Excess glue is squeezed out in advance, preventing heavy glue contamination on hot platens and lowering cleaning workload.

Selection guide

  1. Table size: Match maximum finished plywood size with proper margin.

  2. Rated pressure: Cold pressing works at room temperature with lower pressure than hot press. Normal specific pressure 0.8–1.5 MPa.

  3. Layers / loading capacity: Match batch size of hot press to balance upstream and downstream capacity.

  4. Hydraulic stability: Pressure holding performance is critical. Unstable pressure leads to inconsistent pre-pressing effect.

Who needs cold press?

✅ Mills making thick plywood (≥3 layers) or construction formwork: highly recommended.
✅ Automated layup lines with long-distance mat transportation: cold press is mandatory.
❌ Very small simple lines with thin veneer and short conveying distance: can skip temporarily, but defect rate will rise sharply.
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