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Panel glue up options

7/4/20       
Nate Member

My low volume production of table legs involves 2 glue-ups to get to a solid block to CNC: a panel glue up, then facing the glued panels and face-gluing. One man shop.
My current process is: mitre saw to length, plane for (relative) flatness, table saw to width (no feeder), jointer for square edges for panel glue up, edge glue & dry, then plane again for flat glue prep, then flat glue.
This is inefficient and takes a long time to the point where glue ups are not feeding the CNC enough and its sitting idle.
I need to increase the glue up speeds, and I'm looking to spend some money on equipment to speed up operation. I dont want to over-invest and go for 4-sided planer, Straight line rip saw right out of the gate, is there an in-between to up my production from what I have without spending in those huge machines? I was thinking to do a 2 sided planer and sliding table saw as a start. Thoughts?

7/4/20       #2: Panel glue up options ...
Leo G Member

Cut to length, edge joint your stock, rip to width, glue up, use the CNC to flatten and shape your stock.

7/5/20       #3: Panel glue up options ...
RichardP

More info from you would get some help from others.
You have a cnc?
What size is the panel you are making?
What does the leg look like?
How many do you make a month or week or year?

7/5/20       #4: Panel glue up options ...
Dustin Orth

Are you mechanically inclined? If so, look at the auction market for a moulder. Smaller one would do you fine. A straight line rip can also be had, both used big ones or some of the smaller imports. Whats your budget? Do you have power? Whats your dust collection set up? Do you plan on expanding at all? Can you out source these glue ups to a bigger shop? Is it possible to outsource and order, say 10 sets and stock them? Is it worth spending a bunch of money on equipment or paying someone else to do it for you, then you spend the time building your client base while your CNC is cutting legs? Just some questions for you to think about.

7/6/20       #5: Panel glue up options ...
Tom Gardiner

Consider buying your stock D4S. I get some material S2S for the price of $80/lin ft. I can also have straightlined for about the same. It's a big time saver.
I keep on looking at used Quattromats but subbing out is so much cheaper and I don't have the space for another machine

7/6/20       #6: Panel glue up options ...
MarkB Member

Not sure Im following your process or requirements accurately but if I am close my process would be:

1. Bring in material S2S SLR 1E oversize to leave you enough material to not have to do the initial process of "planing for relative thickness". That is a waste of time and a waste of chip handling in a shop your size. Bigger shop wouldnt care. Me I like making work not handling chips.

We pay $80/MBF for S2S and SLR1E so they handle all the chips and the off falls from straight lining. That would cost us hundreds and hundreds of time, tooling, and disposal dollars, in house.

2. Glue line rip on table saw with feeder

3. Glue up

4. Flatten (face joint) on CNC with as large a cutter as possible (we run a 3.5" 5z cutter)

5. Flip, surface other side

6. Face glue panels

7. Do whatevers next.

The CNC flattening is not the fastest in the world but its being done while were doing something else so its a good option as we too dont have room for other large tooling. Molder isnt going to help much. Leave your stock rough/oversized for thickness before its edge glued and flatten it all at once. Eliminate the planer everywhere you can if your CNC will handle the flattening (10HP minimum).

7/7/20       #7: Panel glue up options ...
Jared E

MarkB, do you do anything special to hold down the panels for flattening on CNC, aside from scraping glue off? I need to surface wood blanks almost dead flat on one side before they will stay put on the spoilboard.

7/7/20       #8: Panel glue up options ...
MarkB Member

We either put them face down (surface bottom side with squeezout/drips first) or paint scraper on the bottom side and run that side down whichever is flatter/sits better. We cage them in with scraps (melamine or laminate drops) on the cnc with vac. If one is a real rocker and wont sit relatively flat we just run a couple screws in the edge of the scraps we cage them in with and clip the heads off at an angle leaving a barb/point that we tap into the edge of the glueup and kick on the vac. That way the glueup is sitting there solid not being pulled down by the vac and we deck it off, then flip, vac hold down no scraps, deck other side.

7/7/20       #9: Panel glue up options ...
Jared E

Good trick, didn't know that one. Thanks.

7/9/20       #10: Panel glue up options ...
Nate Member

Thank you all - based on this thread, found a bigger outfit that has the equipment to do and gave me decent price for finished block. Will go that route until I get my volumes up..thank you!


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