Veneer Splicer Problems 4: Marking, Grooving, Incomplete Glue Joint

Troubleshooting checklist for preventing surface defects that may occur during veneer splicing operations. January 4, 2007

Reprinted with permission from Diehl Machines,

Marking of Stock

Indentations left by the serrations in the lower feed chains.

Improper pressure setting.

Reduce the pressure setting.

Incorrect adjustment of the splicer.

Check the adjustment of the lower heater bar, upper heater bar, and the pressure shoes.

Grooving Along the Glue Line

Gouges or indents in the veneer next and parallel to the glue line. Can be either top or bottom face.

Build up of crystallized glue on either the upper heater strip or lower heater bar.

Excessive glue on the veneer is the source of the problem. Clean the upper strip and lower bar. If scraping is necessary use only soft materials such as wood, brass, or bronze. Running a heavy piece of veneer crossways through the splicer will usually clean them.

Nicks or burrs on the upper strip or lower heater bar.

Repair or replace.

Incomplete Glue Joint

The leading end of the veneer is spliced but the trailing end is open.

The edges of the veneer are not parallel.

Check the jointer.

See other articles in this series at:
Burning, Burnishing, Crimping
Poor Jointing, Excessive Glue Spread, Crimping
Blue Staining

Reprinted with permission from Diehl Machines,