Re: Industrial Metal Detection Ideas?

Actually, flail chains are used in a similar product, a debarker. The chains
pound the bark off the tree before it's fed into a chipper. The problem with
flail chains is that they work much, much slower than hardened bits. The
overall throughput of the system cannot be reduced (or no one would buy it.)

The temperature profiling idea is do-able, but would be a severe safety
hazard. Remember there's tons of dried organic material everywhere around
these machines. barkdust, gasoline, diesel fuel and acres of (quite
flammable) mulch piles everywhere around this equipment.

Good ideas, lets keep em coming,

Chris





"Andy P" <itsasecret@xxxxxxxxxxxxx> wrote in message
news:Zs2dnR9y6aIefenfRVn-hg@xxxxxxxxxxxxxxx
> On the flexible "bit" front, as was mentioned earlier..why not use chains?
> Beat the heck outta them with rotating chains akin to mine clearing
> devices. Chances are that the dense metal of the contaminants wont be
> damaged by the chains, but the wood sure will.
>
> Another thought is a thermal camera. Run everything through a pseudo
> induction heater (like put a heating coil above the conveyor for a few
> feet) and then after that put a thermal camera. The metal pieces will
> hold heat longer than the wood, and you should be able to pick up the
> temperature differences and stop the feed before anyhting damaging gets
> into the machine.


.

Relevant Pages

  • Re: Industrial Metal Detection Ideas?
    ... Beat the heck outta them with rotating chains akin to mine clearing devices. ... Chances are that the dense metal of the contaminants wont be damaged by the chains, ... Run everything through a pseudo induction heater and then after that put a thermal camera. ... The metal pieces will hold heat longer than the wood, and you should be able to pick up the temperature differences and stop the feed before anyhting damaging gets into the machine. ...
    (sci.electronics)
  • Re: Firewood, the most expensive fuel
    ... They burn up gallons of gas, ... trailers and other wood hauling equipment. ... small fortune of chainsaw repairs and new chains. ... to get wood then you clearly know nothing about rural living. ...
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