*
This page has been edited 25 times. The last was made by - gheuer gheuer on May 19, 2015 1:30 pm GMT


8.3 Hot Press

Considerations

  • Pre-Operation Checklist is a prerequisite for ANY operation.
  • Press cores, veneer cover sheets and press glue are prepared and ready to process.
  • There is ample room to assemble glued cores and skins.
  • An auxiliary work table is positioned in front of the press large enough to assemble all cores and skins.
  • Cores and skins are grouped in appropriate sizes and thicknesses.
  • Spacers are provided to eliminate voids between the platens.
  • Platens are protected by mylar skins and/or release agent.
  • Platens are heated to the correct temperature.
  • Operator clears machine and cleans work area after operation.
  • Required OSHA approved personal protective equipment is worn.
  • Material may be loaded and unloaded without delay or encumbrances.
  • Proper cooling procedure is followed.
  • Lock-out/Tag-out procedure is in place and followed.
  • Process is completed in a timely manner.

Pre-Operation Checklist

Level 1

Performance Standard -
  • Verifies press is at operating temperature.
  • Verifies glue, trays and rollers are available and correctly positioned.
  • Verifies emergency stops and limiters are functional.
  • Verifies press faces are clean, flat and free of blemishes.

Level 2

Performance Standard -
  • Powers up press and verifies proper operating temperature has been reached.
  • Adjusts hydraulic pressure as required for press load.
  • Selects and mixes (if required) proper adhesive for given task and material.
  • Inspects and cleans top and bottom platens.
  • Stages material at press table.
  • Determines press loading sequence.
  • Meets Level 1 performance standard.

8.3.1 - Press Flat Panels

Level 1

Given a hot press, staging table, glue, tray, roller, press spacers, 4 particle board press cores 610 x 610 x 18 mm [24" x 24" x 11/16"] and 8 red oak veneer cover sheets 635 x 635 mm [25" x 25"] set up and ready to use, press all 4 panels in a single press cycle.
Performance Standard -
  • Entire core is covered on both sides with veneer skin
  • Veneer is properly aligned on core with no less than 9 mm [3/8"] and no more than 16 mm [5/8"] veneer skin extending beyond the edges of the press cores on all 4 edges and on all 4 panels
  • Panels exhibit minimal or no bleed through of adhesive
  • Panels are free from pressure marks
  • Veneer is fastened firmly to core
  • No adhesive has contaminated the platens

Level 2

Given a hot press, staging table, glue, tray, roller, press spacers, 4 particle board press cores 610 x 610 x 18 mm [24" x 24" x 11/16"] and 8 red oak veneer cover sheets 635 x 635 mm [25" x 25"], set up and press all 4 panels in a single press cycle.
Performance Standard -
  • Places "A" skins good face down on veneer table
  • Places cores with "A" sides up on cores
  • Places "B" skins at the ready in an appropriate location
  • Places glue tray and roller in an appropriate location
  • Charges the roller with glue
  • Applies a consistent and appropriate glue film to all 4 cores
  • Flips all 4 cores over onto "A" cover sheets in quick succession
  • Applies a consistent and appropriate glue film to all 4 cores
  • Places "B" cover sheets in position over cores
  • Loads core and veneer sandwiches into press between spacers
  • Positions cores correctly over hydraulic rams
  • Closes press in a timely fashion
  • Removes pressed panels from press at end of cycle
  • Places cores to allow for even cooling/curing
  • Meets Level 1 performance standard.