Forms of plywood

[Johe Saunders]

Mike Skinner <easyhay at arn.net>
I've been trying to find machines that would densify biomass into
blocks or apple sized balls and your post interested me. Any suggestions
about where to look?


I wish that I had the right type of earth that would 
compact and stay together on my land--if I trucked in
clay, soil and straw it would throw the cost equation out.
All I have is sand.
I know that the 
cobbers of generations ago boxed and tamped earth, then 
layed the units in a running bond, plumb and level.
They used straw and clay and lime too, not to mention
a final parging with something akin to gypsum.
To tighten a mass of earth in a mold and be able to 
unmold the product requires either a container with
draft or one that breaks down.
I would look up plaster molds.  I know how to build 
forms of plywood, having been a form carpenter for
a while.  You might talk to a carpenter who knows
concrete form work and see if you can get some help.
A few 2x4's and a 4x8' piece of 3/4" plyboard would make
several molds.