Veneer Splicer Problems 3: Burning, Burnishing, Crimping

      Troubleshooting checklist for addressing quality issues that arise during veneer splicing operations. January 4, 2007

Reprinted with permission from Diehl Machines, www.diehlmachines.com.

Burning of Veneer


Dark brown scorch lines on either side of the glue line. Usually dominant on the bottom side from the lower heater bar.

Excessive heat from either the upper or lower heater bar. Also crystallizes the glue.

Lower the temperature setting. See temperature/thickness chart.

Increase the feed rate.

Burnishing of Veneer

Crushed and shiny surface along the glue line.

Too much pressure.

Check the pressure setting.

Crimping of Veneer

The veneer is crimped within 1" of either side of the glue line.

The inside edges of the feed chains are worn.

Replace the feed chains.

Reduce the pressure.

See other articles in this series at:
Overlapping
Mismatching
Marking of Stock, Grooving Along the Glue Line, Incomplete Glue Joint
Poor Jointing, Excessive Glue Spread, Crimping
Blue Staining

Reprinted with permission from Diehl Machines, www.diehlmachines.com.

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