David Hendley on mon 4 dec 00
Ed Kraft asks.......
What's a suitable wall thickness for a hollow extrusion?
Well, there's no answer Ed. It all depends on what you want:
the purpose, or use, of what you are making, what clay you
are using, how moist the clay is, and so on.
My extruded kiln posts have 3/4" thick walls, and my extruded
spouts have 1/8 - 3/16" thick walls.
I have also had to go back and re-make the center section of
a die because the wall thickness was not what I wanted.
This is one of the few times in the ceramics shop where a
sixteenth of an inch can make a huge difference in the look
and feel of the finished piece.
--
David Hendley
Maydelle, Texas
hendley@tyler.net
http://www.farmpots.com/
----- Original Message -----
From: Ed Kraft
To:
Sent: Monday, December 04, 2000 9:27 AM
Subject: Extruder report
I designed a sculpture that called for some hollow extrusions. Not having an
extruder I purchased Daryl's book and proceeded to build the extruder from
the plans on page 212. I would like to report that the plans are clear and
the construction simple enough that anyone could make this extruder. The
first die I made was a variation of David Hendley's Two-Part Sheet Metal Die
for Hollow Extrusions page 262. I made my walls 3/8 inches thick (mistake).
After trying a few extrusions it became obvious that the walls didn't need
to be that stout. I quickly made a larger diameter center which made walls
1/4 inch thick. This was better but I was wondering what others would
consider a suitable wall thickness for a hollow extrusion with a fired
center of 1 inch?
Ed Kraft
Earth Arrangements
2109 39th St
Bellingham, WA 98226
360 734-6839 ph 360 647 0416 fax
eartharr@msn.com
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