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Door Manufacturing? Wide Belt sander?

9/24/14       
Dan Member

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.
What process is the best to take the raw built door and smooth it al out ready for our customers to prep and stain?

Thanks

9/25/14       #2: Door Manufacturing? Wide Belt sande ...
Adam West  Member

Website: http://www.surfprepsanding.com

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?

9/25/14       #3: Door Manufacturing? Wide Belt sande ...
Dan Member

We use a 1/16" veneer on all Wood Doors.
MDF doors are 1/8".

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.

9/25/14       #4: Door Manufacturing? Wide Belt sande ...
Adam West  Member

Website: http://www.surfprepsanding.com

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.

9/25/14       #5: Door Manufacturing? Wide Belt sande ...
Dan Member

Were probably looking at a 1/2-3/4 mm max.
From what i gather most guys are using a multi head sander to hit it a couple times in 1 pass with different grits on each drum?

9/28/14       #6: Door Manufacturing? Wide Belt sande ...
Adam West  Member

Website: http://www.surfprepsanding.com

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.

9/29/14       #7: Door Manufacturing? Wide Belt sande ...
Dan Member

Thanks for all the info "Adam West"

By combo head do you mean drum with platten?

9/29/14       #8: Door Manufacturing? Wide Belt sande ...
Adam West  Member

Website: http://www.surfprepsanding.com

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.

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