Brian Haviland on fri 10 dec 04
>Does anyone on the list have any expieriance retrofitting a vacume pump to an
older style pugmill. Where do you apply vacume on the barrel in order to
pull out
air or can you apply vacume to the feed throat to do the job.
Brian in Indiana
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Brian Haviland
Fountain city, Indiana
Haviland Stone Pottery & Raku
bnhavil@greentokai.com
"Accept the things to which fate binds you, and love the people with whom
fate brings you together, but do so with all your heart."
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Vince Pitelka on fri 10 dec 04
>Does anyone on the list have any expieriance retrofitting a vacume pump to
>an
> older style pugmill. Where do you apply vacume on the barrel in order to
> pull out air or can you apply vacume to the feed throat to do the job.
Brian -
I don't think it would be practical unless the pugmill was designed to
accept a vacuum add-on, as is the case with some Bailey pugmills. Harry
Davis invented the single-shaft de-airing pugmill, and the secret is that
the auger blades are mounted at different angles before the vacuum zone and
after the vacuum zone. The clay is shredded by a screen or perforated plate
as it enters the vacuum zone, and it must remain loose and open in the
vacuum zone in order to be properly de-aired. In order for that to happen,
the clay must move slightly faster in the barrel beyond the vacuum zone.
Harry Davis specifies very specific angles for this, and they are essential
for proper operation of the single-shaft pugmill. I have my doubts that it
would be worthwhile to try to convert a single-shaft pugmill to de-airing
operation.
Best wishes -
- Vince
Vince Pitelka
Appalachian Center for Craft, Tennessee Technological University
Smithville TN 37166, 615/597-6801 x111
vpitelka@dtccom.net, wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/
wjskw@BELLSOUTH.NET on sat 11 dec 04
Brian:
Vacuum is vacuum. Placing it on the feeder throat is probably a
better idea, since mixing clay will have "less" of a chance to get
into the vacuum inlet tube. That's what you have to avoid, sucking
clay into the vacuum. Anywhere that the clay usually is _not_ found
is a good place for the vacuum inlet, provided it's not being hit by
the auger . A piece of sponge air cleaner element, such as those
found on lawnmower engines in or near the end of that inlet tube
will help also.
Remember to use a good gauge, make sure there is a good gasket on
the feeder tube door or cover (you need to have that chamber air
tight to pull a vacuum.) You should be able to pull 20 to 28 pounds
with a decent pump. You may also have to rig a cover of sorts for
the "pug" end of the mill. Peter Puggers come with one, but you can
buy assorted sizes of rubber plugs and caps (up to 6 inches in
diameter!) at any plumbing supply store, and just stick it in/on the
end to accomplish that.
Oh yeah...remember to leave the pugmill on when using the vac pump.
Smooshing (there's a technical word for you :>) the clay around as
you draw out the air will help speed the process. Since your
pugmill is probably not a mixer (no reverse) you may want to pull
vacuum first, then leave the vac motor on while pugging clay.
Have fun!
Wayne Seidl
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Brian
Haviland
Sent: Friday, December 10, 2004 8:12 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Pugmill retrofit to de-airing
>Does anyone on the list have any expieriance retrofitting a vacume
pump to an
older style pugmill. Where do you apply vacume on the barrel in
order to
pull out
air or can you apply vacume to the feed throat to do the job.
Brian in Indiana
>___________________________________________________________________
___________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your
subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at
>melpots@pclink.com.
Brian Haviland
Fountain city, Indiana
Haviland Stone Pottery & Raku
bnhavil@greentokai.com
"Accept the things to which fate binds you, and love the people with
whom
fate brings you together, but do so with all your heart."
Notice: "If you are not the intended recipient of this E-mail, be
aware that any disclosure, copying, distribution, or use of this
e-mail and/or any attachments is prohibited. If you have received
this e-mail in error, please notify the sender immediately and
delete this copy and any attachments hereto from your system. Thank
you for your anticipated cooperation."
____________________________________________________________________
__________
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your
subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Brian Haviland on mon 13 dec 04
>Thanks Wayne and Vince
I will be experimenting with all ideas mentioned. I have come accross an
old rubber extruder
from the shop here at work and will be making adjustments to screw and
barrell both,and figure
that even if i fail at making this work i will have learned in the process.
If it works WHOOPEEE !!
Cheep pugger machine..Maybe i'll call it the VIN-WAY(ne) pug mill TEE HEE
HEE..
Wish me luck guys. And again thanks for the input..
Brian
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at
>melpots@pclink.com.
Brian Haviland
Fountain city, Indiana
Haviland Stone Pottery & Raku
bnhavil@greentokai.com
"Accept the things to which fate binds you, and love the people with whom
fate brings you together, but do so with all your heart."
Notice: "If you are not the intended recipient of this E-mail, be aware that any disclosure, copying, distribution, or use of this e-mail and/or any attachments is prohibited. If you have received this e-mail in error, please notify the sender immediately and delete this copy and any attachments hereto from your system. Thank you for your anticipated cooperation."
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