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Door Manufacturing? Wide Belt sander?9/24/14
We build engineered solid core interior doors. All species of woods and a lot of MDF shaker style doors.
After the doors are built we send them through a single head wide belt to flatten out any uneven stile and rail joints.
At times the joints from stile and rail are not perfect due to veneer variance or different runs of the MDF.
How thick are the veneers you have to work with? Most door manufacturers hey along just fine with a quality wide belt machine with enough heads to level out the surface and make it consistent.
Thinner veneer may require a segemented platen machine.
Are you discussing basic sanding or more advanced sanding like orbital machines to remove cross grain?
We use a 1/16" veneer on all Wood Doors.
Not worried about cross grain sanding just the process to get the stile rail joints smooth and flush without sending through the wide belt sander multiple times per side.
Can you give me an idea of the mismatch we need to cut down? I would lean toward a quality 3 head. Drum, drum, combi-head.
What final grit? 150 or 180 is pretty standard for a people door.
Were probably looking at a 1/2-3/4 mm max.
You will need a 3 head depending on the desired final finish. It is common to stop with 150-180 grit. You would be very well served to use 80-120-150, all paper belts. A drum, drum, combination head would be pretty much ideal. If you need finer finishing you might need 4 heads. There are a huge number of variables so asking more questions will help me narrow it down.
Thanks for all the info "Adam West"
By combo head do you mean drum with platten?
Yes. The drum does all the work of removing the scratch from earlier heads. The only job for the platen is to lengthen the scratch to make it more shallow and easier to sand away.
Many door manufacturers do not orbital sand their doors. In that instance a very soft drum in the last position often works great while showing very little scratch in spray stains. The shorter scratch is often less visible in certain types of stains. Soft drum scratches are always slightly deeper than platen scratches belt for belt.