×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Debarking machine for small diameter shrub

Debarking machine for small diameter shrub

Debarking machine for small diameter shrub

(OP)
I'm investigating whether there exists a machine that can remove the bark from a shrub (1" - 3" diameter) without destroying the bark.  The goal of the research I'm doing is to find a way to remove the bark of a tree for its medicinal use, but with minimal shredding/chipping.  All the debarking machinery I've been able to find so far have been intended for the logging industry and hence unsuitable, primarily because of the small diameter here.  The present method employed for removing the bark has been to soak it in water for a few days and then to remove it by beating it with a mallet.

RE: Debarking machine for small diameter shrub

If your limbs are fairly straight, you might have some luck with a veneer lathe.

RE: Debarking machine for small diameter shrub

(OP)
That would be too labor-intensive given the large number of small trees that would be "harvested" for this purpose (100/day?).  I'm looking for a process that is automated and low-cost.  Thanks for the response though.

RE: Debarking machine for small diameter shrub

I need a little more clarification, do you need a machine that can handle the smaller limbs or is the size of the removed bark the problem? (or both?) Are you only interested with part of the bark? Can you tolerate any "contamination" with wood pulp?

I do not know of anything suitable for your usage, but I imagine something could be made. I would start with a set of pinch rollers feeding the limb into the de-barking stage. Two de-barking stategies that I can think of off the top of my head include a wide chain (multiple rows of roller chain) or steel wheels with bits.

RE: Debarking machine for small diameter shrub

One more idea - you could use high pressure water jets if there is enough difference between the bark and pulp.

RE: Debarking machine for small diameter shrub

(OP)
Thanks for the high pressure water jet idea <jbthiel>.  That sounds like it may hold some potential.  I think if the shrub were soaked to sufficiently loosen the bark, the high water pressure may be able to remove it.

I need a machine that can handle small limbs/trunk.  Size of bark is not a problem, larger strips are preferred.  Minor contamination with wood is tolerable.

I have not been able to find a conventional machine that would be applicable for a shrub with such a small diameter (1" - 3"), so a custom-designed apparatus may be the only mechanical solution.  Do you have any knowledge about where to start along that path?

RE: Debarking machine for small diameter shrub

Try the Publisher of Forest Products Equipment.  (Jim Kendrick) Website is www.fpemagazine.com

Fence posts are commonly this small, so the system must already exist to render the small diameter debarking necessary.

Couldn’t you just feed the whole tree and everything through a chipper and sort it out latter via some sort of settling, filtering methods and decanting?

RE: Debarking machine for small diameter shrub

onereggie,
There exists a tool for cutting kernels of sweet corn from the cob.  It is similar to a wood plane used for cutting radiused moldings.  The corn cutter cuts a lengthwise strip from the cob and the cob is rotated to make another pass.  For your application,you could arrange several around the diameter and allow them to float to compensate for the taper.
Gotta run but google ammerican corn cutter & molding planes
to get a general idea of the concept.

Griffy

RE: Debarking machine for small diameter shrub

onereggie,
Another similar cutting device is a potato peeler although the cutting edge is usually straight on these.

Griffy

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close