any problems in the plant. The problems seem worse after the product is installed.
A:To crack dry wood, espe- cially in the middle of a piece, requires quite a bit for force. Dry wood that is not already cracked is not easily cracked. In fact, if the veneer you have is 10 percent
MC when it comes and your plant is 8 percent EMC, that small difference does not develop enough force to break the wood. Likewise, even if the customer has 6 percent EMC (= 30 percent RH), that will not create enough shrinkage as the wood dries down to 6 percent MC — so develop enough stress to crack the wood.
So, what we have with 99 percent probability is that the veneer you have already has some small checks in it. These could be from the lathe (and called lathe checks and caused by improper nose bar pressure at the lathe when the veneer is peeled) or it could be from improper drying. With these pre-existing checks, any drying that occurs after you finish the veneer will result in shrinkage and opening of these pre-existing checks.
you purchase an RH and temperature sensor from a local retail electronic supply house. These sensors are exceptionally good.
Q:We have a potential client for our wood shaving and they wanted to know what species might be toxic to horses. Can you help?
A:Black walnut is known to be very toxic to horses. Chips containing as little as 5 per- cent walnut are hazardous. The Ohio State Extension Service also lists all oaks (because of their high tannin content), but they are a problem only if the horse were to chew and digest the wood. Contact your local county extension office for up-to-date advice. ●
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Utilizes a simple and totally unique double template system. Both templates are independently controlled, and allow us to cut two different profiles on the same wood piece.
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You might want to put a few samples of your incoming veneer into an oven at 110-120F. After an hour or two, these pieces will shrink quite a bit more than they would in service. Any pre-existing checks will open, but the shrinkage will not generally be enough to create new checks.
I hope you are measuring the RH with a good instrument. I suggest that
Gene Wengert, “The Wood Doctor,” has been training people in efficient use of wood for the past 35 years. He is presently an extension specialist emeritus at the University of Wisconsin-Madison. Fax your questions to him at 847.390.7100 or e-mail to wooddoc@uwalumni.com.
3 axis CNC band saw
CNC Point-To-Point boring unit (optional)
The fastest and most efficient method for cutting and boring sheet wood
Faster than a router
Significantly reduces waste material compared to a router
Automatically saws and bores multiple sheets in one operation
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