RE: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
Posted by
Nigel Bailey
on 2003-03-06 02:37:44 UTC
ordinary araldite flows like water when it's hot, I often glue stuff
together after heating it up, as it improves penetration of the glue into
tight spaces. although it goes off pretty damn quick too. However heating up
the metalwork (unless it is soaked carefully) might go against accuracy,
which is the whole point so maybe not so good an idea?
Nig
-----Original Message-----
From: Miroslav Pejic [mailto:peja@...]
Sent: Thursday, March 06, 2003 7:10 AM
To: 'CAD_CAM_EDM_DRO@yahoogroups.com'
Subject: RE: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
There is a method to speed-up resin to flow: fastening some vibration
source to frame one can get better flow. (for example a small machine
used for car surface grinding before painting (I'm I clear?))
-----Original Message-----
From: JanRwl@... [mailto:JanRwl@...]
Sent: Wednesday, March 05, 2003 9:55 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
In a message dated 3/5/2003 7:35:26 AM Central Standard Time,
leswatts@... writes:
I have been using an epoxy resin called "Epon 815" mfd. by Shell Chemical,
also distributed by Miller-Stephenson in plastic gallon-jugs, on up to 55
gallon drums. It is as viscous as and LOOKS exactly like that clear Karo
syrup used for pastries, etc. It is cured with a catalyst with a name I can
NEVER remember; something like "Tetraethyltriamine" or whatever, ALWAYS just
abbreviated as "TETA". This is added to the resin in a ratio of 1:10. That
is, TEN parts resin plus ONE part TETA. It must be stirred very well, and
preferably vacuumed to float bubbles to the top, and then cured "overnight".
It gets unmanageable in a couple of hours, but not really "hard" for several
hours. It continues to harden for 24. This stuff is used extensively to
"pot" electronics, to make prototypes, or even mold production-parts, as one
can make a mold with just soft RTV-11, using a "real original" as the model,
and then "peel off" the RTV image, and pour the epoxy into that. It will
very faithfully "copy" scratches caused by fine steel-wool on the original!
It is SURELY viscous enough to make "lenses", but it WOULD require the
spinning motor be left running for 5 hours or more! BUT, it may not be
ideal for this, as any excess TETA that doesn't polymerize "floats" to the
top, and leaves dozens of little "bubble-pockets" per CM, when wiped off the
hardened surface. I have discovered that this frustration can be at least
partly reduced by using slightly LESS TETA, but I have NEVER been able to
learn if this WEAKENS the final cured material, or simply slows down the
cure, which it definitely DOES do!
Last gallon I bought (a year back?) cost me about $70 from M-S, as I recall,
but their price for the TETA (quart bottle is MORE than enough for the
gallon
of resin) was considerably less than I remember from Shell direct (they have
a distributor here), though Shell charged me less for the resin! Guess the
total was about equal from either source. The M-S jug was nicer! LOL, but
true!
I have mixed variously liquid printers' black-out (used for touch-up
lithofilms), chalk-line refill powdered chalk, rice, and beach-sand as
pigment or fill, all with success. It seems it would perform as a fine
water-proof adhesive for wood, but I soon learned it is not at all "STRONG"
for that purpose, though it DOES kinda work. (Polyurethane wood glue is
much, much better for a strong waterproof bond, wood-to-wood!). The Epon
815
sticks to CLEAN (JUST-sanded and solvent-swiped) metal very well, but I
don't
think I'd want to fly in an airplane "glued up" with the stuff.
It seems to shrink physically a TINY amount on curing, but I'm not sure that
is no more than my imagination. It does NOT expand on curing.
[Non-text portions of this message have been removed]
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OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
http://www.metalworking.com/news_servers.html
http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
together after heating it up, as it improves penetration of the glue into
tight spaces. although it goes off pretty damn quick too. However heating up
the metalwork (unless it is soaked carefully) might go against accuracy,
which is the whole point so maybe not so good an idea?
Nig
-----Original Message-----
From: Miroslav Pejic [mailto:peja@...]
Sent: Thursday, March 06, 2003 7:10 AM
To: 'CAD_CAM_EDM_DRO@yahoogroups.com'
Subject: RE: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
There is a method to speed-up resin to flow: fastening some vibration
source to frame one can get better flow. (for example a small machine
used for car surface grinding before painting (I'm I clear?))
-----Original Message-----
From: JanRwl@... [mailto:JanRwl@...]
Sent: Wednesday, March 05, 2003 9:55 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
In a message dated 3/5/2003 7:35:26 AM Central Standard Time,
leswatts@... writes:
> I think most epoxies and polyester/styrene resins are too viscous to flowLes:
> out well, but I know some very low viscosity specialty resins can be had.
>
I have been using an epoxy resin called "Epon 815" mfd. by Shell Chemical,
also distributed by Miller-Stephenson in plastic gallon-jugs, on up to 55
gallon drums. It is as viscous as and LOOKS exactly like that clear Karo
syrup used for pastries, etc. It is cured with a catalyst with a name I can
NEVER remember; something like "Tetraethyltriamine" or whatever, ALWAYS just
abbreviated as "TETA". This is added to the resin in a ratio of 1:10. That
is, TEN parts resin plus ONE part TETA. It must be stirred very well, and
preferably vacuumed to float bubbles to the top, and then cured "overnight".
It gets unmanageable in a couple of hours, but not really "hard" for several
hours. It continues to harden for 24. This stuff is used extensively to
"pot" electronics, to make prototypes, or even mold production-parts, as one
can make a mold with just soft RTV-11, using a "real original" as the model,
and then "peel off" the RTV image, and pour the epoxy into that. It will
very faithfully "copy" scratches caused by fine steel-wool on the original!
It is SURELY viscous enough to make "lenses", but it WOULD require the
spinning motor be left running for 5 hours or more! BUT, it may not be
ideal for this, as any excess TETA that doesn't polymerize "floats" to the
top, and leaves dozens of little "bubble-pockets" per CM, when wiped off the
hardened surface. I have discovered that this frustration can be at least
partly reduced by using slightly LESS TETA, but I have NEVER been able to
learn if this WEAKENS the final cured material, or simply slows down the
cure, which it definitely DOES do!
Last gallon I bought (a year back?) cost me about $70 from M-S, as I recall,
but their price for the TETA (quart bottle is MORE than enough for the
gallon
of resin) was considerably less than I remember from Shell direct (they have
a distributor here), though Shell charged me less for the resin! Guess the
total was about equal from either source. The M-S jug was nicer! LOL, but
true!
I have mixed variously liquid printers' black-out (used for touch-up
lithofilms), chalk-line refill powdered chalk, rice, and beach-sand as
pigment or fill, all with success. It seems it would perform as a fine
water-proof adhesive for wood, but I soon learned it is not at all "STRONG"
for that purpose, though it DOES kinda work. (Polyurethane wood glue is
much, much better for a strong waterproof bond, wood-to-wood!). The Epon
815
sticks to CLEAN (JUST-sanded and solvent-swiped) metal very well, but I
don't
think I'd want to fly in an airplane "glued up" with the stuff.
It seems to shrink physically a TINY amount on curing, but I'm not sure that
is no more than my imagination. It does NOT expand on curing.
[Non-text portions of this message have been removed]
Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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timg@...
Moderator: pentam@... indigo_red@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
http://www.metalworking.com/news_servers.html
http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
http://www.metalworking.com/news_servers.html
http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Discussion Thread
Leslie M. Watts
2003-02-28 11:25:58 UTC
Re: [CAD_CAM_EDM_DRO] Hot rolled router frame: added note
tsalaff <tacman@s...
2003-02-28 14:05:38 UTC
Re: Hot rolled router frame: added note
Leslie M. Watts
2003-02-28 14:34:22 UTC
Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
vrsculptor <vrsculptor@h...
2003-02-28 20:00:06 UTC
Re: Hot rolled router frame: added note
Leslie M. Watts
2003-03-01 06:45:46 UTC
Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
dakota8833 <dakota8833@b...
2003-03-01 07:18:09 UTC
Re: Hot rolled router frame: added note
Leslie M. Watts
2003-03-01 07:40:46 UTC
Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
dakota8833 <dakota8833@b...
2003-03-02 17:00:01 UTC
Re: Hot rolled router frame: added note
turbulatordude <davemucha@j...
2003-03-02 17:22:34 UTC
Re: Hot rolled router frame: added note - EPOXY
dakota8833 <dakota8833@b...
2003-03-02 17:27:47 UTC
Re: Hot rolled router frame: added note
dakota8833 <dakota8833@b...
2003-03-02 19:28:45 UTC
Re: Hot rolled router frame: added note - EPOXY
Miroslav Pejic
2003-03-05 03:51:21 UTC
RE: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
Leslie M. Watts
2003-03-05 05:34:01 UTC
Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
ccq@x...
2003-03-05 07:43:41 UTC
Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
JanRwl@A...
2003-03-05 12:55:47 UTC
Re: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
Miroslav Pejic
2003-03-05 23:09:14 UTC
RE: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
Miroslav Pejic
2003-03-06 01:10:10 UTC
RE: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note
Nigel Bailey
2003-03-06 02:37:44 UTC
RE: [CAD_CAM_EDM_DRO] Re: Hot rolled router frame: added note