--- Bill McJunkin <wmcj@...> wrote:
>i di some anchors in rock with sulphur once,1971 i
think, and they are still there







  Just to keep things going I can think of a couple of
> other things that
> expand on cooling  or freezing. . .   Natural rubber
> and molten sulpher
> (very slightly).  I have used both sulpher and a
> mixture of sulpher and
> carbon black, melted and poured into anchor holes in
> stone and concrete
> to make very strong anchors.  This past week I
> happened to find some
> 1.25" steel cables that were anchored in granite
> with sulpher over forty
> years ago.  I believe that bismuth has the greatest
> expansion of the
> solid materials.
>
>
> --
> Bill McJunkin  N6FAB   wmcj@...
> That which lingers in your mind might be lost
> elsewhere.
> ________________________________________
> http://www.jps.net/wmcj/index.html Apprentice
> Neanderthal
> http://www.jps.net/mcjunkin/index.htm  John McJunkin
> Photography
>
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be
> found here:
> http://members.xoom.com/HWilkinson/index.htm
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>
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The Texas Towman ---  aspiring sailor

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Linotype metal is different than the metal that the individual pieces of
type which are set by hand, from a type case. Hand set type is harder than
Linotype metal because it has to last "forever" and lino metal is recycled
and was not intended to be used indefinetly.
   Ah, the linotype. Now there was a very interesting machine. Hundreds of
levers, gears, shafts,  cams and followers all operating in unison. An
ingenious machine. Anyone that has never seen one operate is missing
something. Alas, they have all but went by the wayside.
----- Original Message -----
From: "John Grant" <grantjoh@...>
To: <hobbicast@yahoogroups.com>
Sent: Saturday, March 31, 2001 10:45 PM
Subject: Re: [hobbicast] Crucible


>
>
> Joe Dobson wrote:
>
> > Someone had mentioned type metal in a previous post as being something
that
> > shrank when it cooled.
> >   I remember from my high school printing class that type metal was
composed
> > of Lead, tin, and the notorious "antimony". One of the two latter
> > ingredients gave the metal hardness so it could withstand numerous
> > impressions on the press.
>
> Linotype metal is 7% tin, 11% antimony and 82% lead.  The tin makes it
flow freely, the antimony gives
> hardness.  I doubt very much that the expanision of 11% of the mixture can
overcome the shrinkage of the other
> 89%.
>
> John Grant
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

The other aspect of the frozen metal in the crucible is that the crucible
"shrinks" around the metal causing it
crack. It may shrink at a greater rate than the metal therefore cracking the
crucible, the less rigid material.
I would like to clarify that this is a more accurate description of "Freezing or
expanding" metal in the
crucible.  The end result is still the same- The integrity of the crucible has
become questionable.
Thanks-JMM
Keith Kinney wrote:

> A friend gave me a very nice crucible.  Probably a #10 or #12.  However, the
> last time he used is he let the aluminum harden in it.  It is about 3/4
> full.  Is it going to break when I heat it up?  Is there something I can do
> to try and prevent it from breaking?  Any suggestions?
> Thanks.
> Keith
>
> Keith Kinney
> Evansville, Indiana USA
> mailto: Keith@...
> http://www.HerculesEngines.com
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:  
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
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yes the computer has wiped them out. I have seen them work. Poetry in motion.
Also I worked for a printing
press manufacture (Web Press) And to see a finished press being tested is also a
sight.
Larry

Joe Dobson wrote:

>  Linotype metal is different than the metal that the individual pieces of

Lance Crowe wrote:

>I poured 4 or 5 tons of cast iron into resin bonded sand
>with great results, and super detail.

Lance,

What type of resin, ratio to sand and do they last more than one pouring?
Thanks.

Mr. Bill


[Non-text portions of this message have been removed]

Joe Dobson wrote:

>  Linotype metal is different than the metal that the individual pieces of
> type which are set by hand, from a type case. Hand set type is harder than
> Linotype metal because it has to last "forever" and lino metal is recycled
> and was not intended to be used indefinetly.

Type metal has more antimony, for hardness but not very much different from
Linotype metal.

>  Ah, the linotype. Now there was a very interesting machine. Hundreds of
> levers, gears, shafts,  cams and followers all operating in unison. An
> ingenious machine. Anyone that has never seen one operate is missing
> something. Alas, they have all but went by the wayside.

A lot of amature printers still have them.  I operate the Model 31 at the Museum
of American Heritage in Palo
Alto, CA and I have an Model G4 Intertype at home.

John Grant

John Grant

lawrence jackman wrote:

> Oh but it does. That is why it is used.

The makers of the Linotype say that antimony is there for hardness.

> Either antimony or bismuth. The
> grade I used had bismuth in it. If your print shrank you would have
> voids in the face of your type and when printing it would leave areas
> that would not have any ink on the paper.

To test this I made a simple hand mold for casting type.  I used Linotype metal
and I also used pure lead.  The
face of the type is just as sharp with the pure lead as with the Linotype metal.

> John Grant wrote:
>
> > Linotype metal is 7% tin, 11% antimony and 82% lead.  The tin makes it flow
freely, the antimony gives
> > hardness.  I doubt very much that the expanision of 11% of the mixture can
overcome the shrinkage of the other
> > 89%.

From a 1940 edition of "Linotype Machine Principles" published by the
Mergenthaler Linotype Company:

"Linotype metal contains three elements; lead, tin, antimony. Antimony gives
hardness to the metal; tin adds
fluidity and strength and also improves the face.
The approximate proportions are; lead 85 per cent; antimony, 11 percent; tin 4
percent."

John Grant


lawrence jackman wrote:

> Bismuth also expands. I used linotype metal for casting. The company
> that made it for me was Non-Ferrous Metals located on Harbor Island in
> Seattle Wa. He told me what the formula was. I do not remember the exact
> amounts but it was 80 to 85% lead, some tin and about 2% bismuth. It
> worked for me in my spin caster with rubber molds. Other grades of
> printers metal used antimony instead of bismuth
>
> John Grant wrote:
> >
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:  
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

When I was in printing in school- which was 4 years worth I liked it so
much- we had that model 8. The old man teacher retired after my first year.
He was a hot metal man. I couldn't get enough of all the neat machinery. We
also had a big Babcock cylinder press that they printed the school paper on.
That thing would probably be outlawed in todays society as unsafe - as far
as having kids run it. It's amazing what used to be considered normal that
would give the school board folks a connipption fit today. I wanted to run
the linotype soooo bad. The new teacher was an offset man. Boooring to me.
He hated all the hot type stuff. Too filthy and dirty, I suppose, plus that
kind of stuff was on the way out and there was probably no need to teach it
anymore.  I begged him to let me run the lino. Finally, he said that if I
learned the keyboard, he would give me a shot. I studied and studied. I even
found a mail order book dealer who carried Linotype trouble shooting books
compiled by old time lino mechanics, and bought them myself.  I had the
keyboard memorized left to right and up and down. ETAOIN- ESCVX.  Then,
after all that, he changed his mind and wouldn't go thru with it. Turned off
the fire even. Pissed me off. I would wait until he left for lunch, then
sneak back into the shop, turn it on, disconnect the plunger, and start
playing. Don't know if it hurt anything running the machine with the pot
disconnected and all, but I at least got some satisfaction of making the
machine do something.....
   As an aside, I sometimes look on ebay for printing related articles to see
what is selling. It's hard to believe what a font of hand set type will
bring, even the small fonts. I had me a nice Hamilton double cabinet full of
type, up to 84 pt., that our daily newspaper editor gave to me when they
went offset. I just waltzed into his office, at the ripe old age of 14 (30
years ago), and asked him what they had planned for all that type and cases
now that they were into offset. He looks me up and down, and asks me what I
wanted it for. I tell him I have a little shop in my basement at home. 2
platen presses and a Vandercook proof press. He thought a bit and says
"Well, if you can get it loaded, you can just have it."  All that stuff-
logotypes, newspaper cuts, wooden type, big lead type, all them california
cases- I could make a ton off of it if I had kept all of it.  I gave it all
to another kid in later years who was just as ate up with printing as I had
been.....
----- Original Message -----
From: "John Grant" <grantjoh@...>
To: <hobbicast@yahoogroups.com>
Sent: Sunday, April 01, 2001 11:49 AM
Subject: Re: [hobbicast] Crucible


>
>
> Joe Dobson wrote:
>
> >  Linotype metal is different than the metal that the individual pieces
of
> > type which are set by hand, from a type case. Hand set type is harder
than
> > Linotype metal because it has to last "forever" and lino metal is
recycled
> > and was not intended to be used indefinetly.
>
> Type metal has more antimony, for hardness but not very much different
from Linotype metal.
>
> >  Ah, the linotype. Now there was a very interesting machine. Hundreds of
> > levers, gears, shafts,  cams and followers all operating in unison. An
> > ingenious machine. Anyone that has never seen one operate is missing
> > something. Alas, they have all but went by the wayside.
>
> A lot of amature printers still have them.  I operate the Model 31 at the
Museum of American Heritage in Palo
> Alto, CA and I have an Model G4 Intertype at home.
>
> John Grant
>
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

It is hard to see anything interesting in a computer setting there whirring
compared to a linotype setting type, or hand feeding a sheetfed press
running wide open.
----- Original Message -----
From: "lawrence jackman" <ljack70117@...>
To: <hobbicast@yahoogroups.com>
Sent: Sunday, April 01, 2001 8:41 AM
Subject: Re: [hobbicast] Crucible


> yes the computer has wiped them out. I have seen them work. Poetry in
motion. Also I worked for a printing
> press manufacture (Web Press) And to see a finished press being tested is
also a sight.
> Larry
>
> Joe Dobson wrote:
>
> >  Linotype metal is different than the metal that the individual pieces
of
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

We went through this some time a go on this list. An eye ball look at this kind
of test tell you NOTHING. You need to
cast the type in the type mold and then set them up on a press and try printing
and you will find the shrink voids and
then know that type must expand to be useful to the trade!!!!!!!!!!!!!!!!!!!!!
Mr Grant ar you the gentelman with the home made caster with no top???????
Larry Jackman

John Grant wrote:

> John Grant

Hello everyone:

I'm brand new to this group and the metal casting world. I want to
build a Gingery lathe and have about 100# of good aluminum scrap, but
reading some of last summer's posts about the superiority of cast iron
(strength and weight I assume) I wonder if I could use a high strength
zinc alloy (to avoid dealing with the high temps. of melting and
pouring cast

my uncle operated a linotype for chic trib for 30
yrs,wish he was here

Sid




--- lawrence jackman <ljack70117@...> wrote:
> yes the computer has wiped them out. I have seen
> them work. Poetry in motion. Also I worked for a
> printing
> press manufacture (Web Press) And to see a finished
> press being tested is also a sight.
> Larry
>
> Joe Dobson wrote:
>
> >  Linotype metal is different than the metal that
> the individual pieces of
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be
> found here:
> http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>


=====
The Texas Towman ---  aspiring sailor

__________________________________________________
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail.
http://personal.mail.yahoo.com/?.refer=text

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    From: "Joe Dobson" <otei203@...>


  Linotype metal is different than the metal that the individual pieces of
type which are set by hand, from a type case. Hand set type is harder than
Linotype metal because it has to last "forever" and lino metal is recycled
and was not intended to be used indefinetly.
   Ah, the linotype. Now there was a very interesting machine. Hundreds of
levers, gears, shafts,  cams and followers all operating in unison. An
ingenious machine. Anyone that has never seen one operate is missing
something. Alas, they have all but went by the wayside.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

When I was a kid, The Museum of Science and Industry in Chicago had one on
display that would make you a take home sample.  I do not know if it is
still there, it probably is, but the high percentage of lead in the sample
may have been the end of the take home part.

lawrence jackman wrote:

> We went through this some time a go on this list. An eye ball look at this
kind of test tell you NOTHING. You need to
> cast the type in the type mold and then set them up on a press and try
printing and you will find the shrink voids and
> then know that type must expand to be useful to the trade!!!!!!!!!!!!!!!!!!!!!

I did exactly that except that I did not find the voids you are talking about.
The pure lead type printed an image as
sharp as the Linotype metal type.

Did YOU ever try it or is all of your comments based on theory?

>
> Mr Grant ar you the gentelman with the home made caster with no top???????
> Larry Jackman

My Linotype is a standard machine.  The hand mold I used to cast the test pieces
has an open top to pour the metal into.

John Grant

On the linotype, for those of you who are familiar with it, the molten lead
is forced under pressure from the plunger in the crucible into the mold face
(matrices) I think the reason they do that is because of shrinkage of the
type face extremities. Having the lead introduced under pressure in the
typecasting mold is along the same lines as having sprues and gates and etc.
in a regular mold. To keep liquid metal in reserve to keep the mold cavity
well supplied as the liquid solidified as it cooled and shrinks away from
the mold face. Right?
----- Original Message -----
From: "John Grant" <grantjoh@...>
To: <hobbicast@yahoogroups.com>
Sent: Monday, April 02, 2001 9:30 AM
Subject: Re: [hobbicast] Crucible


>
>
> lawrence jackman wrote:
>
> > We went through this some time a go on this list. An eye ball look at
this kind of test tell you NOTHING. You need to
> > cast the type in the type mold and then set them up on a press and try
printing and you will find the shrink voids and
> > then know that type must expand to be useful to the
trade!!!!!!!!!!!!!!!!!!!!!
>
> I did exactly that except that I did not find the voids you are talking
about. The pure lead type printed an image as
> sharp as the Linotype metal type.
>
> Did YOU ever try it or is all of your comments based on theory?
>
> >
> > Mr Grant ar you the gentelman with the home made caster with no
top???????
> > Larry Jackman
>
> My Linotype is a standard machine.  The hand mold I used to cast the test
pieces has an open top to pour the metal into.
>
> John Grant
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

What is a gate in a mold? Gingery talks about them in his lathe book but
never mentions what they are.

John

----- Original Message -----
From: "Joe Dobson" <otei203@...>
To: <hobbicast@yahoogroups.com>
Sent: Monday, April 02, 2001 3:35 PM
Subject: Re: [hobbicast] Crucible


> On the linotype, for those of you who are familiar with it, the molten
lead
> is forced under pressure from the plunger in the crucible into the mold
face
> (matrices) I think the reason they do that is because of shrinkage of the
> type face extremities. Having the lead introduced under pressure in the
> typecasting mold is along the same lines as having sprues and gates and
etc.
> in a regular mold. To keep liquid metal in reserve to keep the mold cavity
> well supplied as the liquid solidified as it cooled and shrinks away from
> the mold face. Right?
> ----- Original Message -----
> From: "John Grant" <grantjoh@...>
> To: <hobbicast@yahoogroups.com>
> Sent: Monday, April 02, 2001 9:30 AM
> Subject: Re: [hobbicast] Crucible
>
>
> >
> >
> > lawrence jackman wrote:
> >
> > > We went through this some time a go on this list. An eye ball look at
> this kind of test tell you NOTHING. You need to
> > > cast the type in the type mold and then set them up on a press and try
> printing and you will find the shrink voids and
> > > then know that type must expand to be useful to the
> trade!!!!!!!!!!!!!!!!!!!!!
> >
> > I did exactly that except that I did not find the voids you are talking
> about. The pure lead type printed an image as
> > sharp as the Linotype metal type.
> >
> > Did YOU ever try it or is all of your comments based on theory?
> >
> > >
> > > Mr Grant ar you the gentelman with the home made caster with no
> top???????
> > > Larry Jackman
> >
> > My Linotype is a standard machine.  The hand mold I used to cast the
test
> pieces has an open top to pour the metal into.
> >
> > John Grant
> >
> >
> > Please visit our sponsor: Budget Casting Supply
> > http://budgetcastingsupply.com/
> >
> > The Home Foundrymen's Association website may be found here:
> http://members.xoom.com/HWilkinson/index.htm
> > It includes member project pages & links
> >
> > To unsubscribe from this group, send an email to:
> > hobbicast-unsubscribe@egroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

Joe Dobson wrote:

> On the linotype, for those of you who are familiar with it, the molten lead
> is forced under pressure from the plunger in the crucible into the mold face
> (matrices) I think the reason they do that is because of shrinkage of the
> type face extremities. Having the lead introduced under pressure in the
> typecasting mold is along the same lines as having sprues and gates and etc.
> in a regular mold. To keep liquid metal in reserve to keep the mold cavity
> well supplied as the liquid solidified as it cooled and shrinks away from
> the mold face. Right?

Right, the matrices are at room temperature.  The 550 degree metal freezes
almost instantly when the metal is
pumped in under pressure (about 20 psi).  The pressure is maintained until the
metal is hard.  The casting
process is over in less than 2 seconds.
The machine can operate at 14 lines per minute or a line every 4 seconds.

The Monotype cast single pieces of type at 3 pieces per second for the sizes
used in newspapers.  Slower for
the larger sizes.

BTW, you can get very fine detail using lost wax casting with metals that have
no part of the alloy that
expands when cooling.

John Grant

> > > We went through this some time a go on this list. An eye ball look at
> this kind of test tell you NOTHING. You need to
> > > cast the type in the type mold and then set them up on a press and try
> printing and you will find the shrink voids and
> > > then know that type must expand to be useful to the
> trade!!!!!!!!!!!!!!!!!!!!!
> >
> > I did exactly that except that I did not find the voids you are talking
> about. The pure lead type printed an image as
> > sharp as the Linotype metal type.
> >
> > Did YOU ever try it or is all of your comments based on theory?
> >
> > >
> > > Mr Grant ar you the gentelman with the home made caster with no
> top???????
> > > Larry Jackman
> >
> > My Linotype is a standard machine.  The hand mold I used to cast the test
> pieces has an open top to pour the metal into.
> >
> > John Grant

In a message dated 4/2/01 9:36:38 AM Mountain Daylight Time,
grantjoh@... writes:

<<
  BTW, you can get very fine detail using lost wax casting with metals that
have no part of the alloy that
  expands when cooling.
   >>
My first experiment using lost wax was done casting with lead, the details
included a fingerprint that I had left in the wax.  The fingerprint was
perfect in the resultant lead casting.
bill

Hi Group,

My first summer job was working for a newspaper that had linotype machines.
My job entailed feeding the machines with lead bars that weighed enough to
waste me after one shift!  There were a bank of, say, six machines, that I
supplied with lead and helped the operators keep them running; they also kept
me running!  A myriad of gears and cams and everything had to be kept well
lubricated and clean.  I'll never forget that experience.

Norman Castaneda

I am not and have never been a printer. As a machinist. I have help build
printing presses  But in school when our class
visited the Salina KS news Paper, the forman who was conducting the tour, said
the type had to expand on freezing. Later
When working as a maintenance machinist, in a print shop I was told the same
thing by the printers working there. When
working for Web press ( maker of rotaries) I was told the same thing. In physic
class I was taught the same thing. So with
all these teachers TEACHING ME WRONG, I will drop out of the conversation and
let the EXPERTS HAVE THE FLOOR.
Thank you Gentleman
Larry Jackman
having more fun than one human should be allowed to have

John Grant wrote:

> lawrence jackman wrote:

The gate is the little opening that connects the runner to the mold and lets
your martial in to the cavity. The
sprue is where the machine injects or is the place where you pour metal or where
the casting machine slings the
material into the mold. You have in this order inside the mold----- 
sprue----runner----gate-----cavity. The
mold is the entire block of metal or rubber or other material. Your part is
formed in the cavity part of the
mold.
Larry Jackman

e.heritage@... wrote:

> What is a gate in a mold? Gingery talks about them in his lathe book but
> never mentions what they are.
>
> John
>
> ----- Original Message -----
> From: "Joe Dobson" <otei203@...>
> To: <hobbicast@yahoogroups.com>
> Sent: Monday, April 02, 2001 3:35 PM
> Subject: Re: [hobbicast] Crucible
>
> > On the linotype, for those of you who are familiar with it, the molten
> lead
> > is forced under pressure from the plunger in the crucible into the mold
> face
> > (matrices) I think the reason they do that is because of shrinkage of the
> > type face extremities. Having the lead introduced under pressure in the
> > typecasting mold is along the same lines as having sprues and gates and
> etc.
> > in a regular mold. To keep liquid metal in reserve to keep the mold cavity
> > well supplied as the liquid solidified as it cooled and shrinks away from
> > the mold face. Right?
> > ----- Original Message -----
> > From: "John Grant" <grantjoh@...>
> > To: <hobbicast@yahoogroups.com>
> > Sent: Monday, April 02, 2001 9:30 AM
> > Subject: Re: [hobbicast] Crucible
> >
> >
> > >
> > >
> > > lawrence jackman wrote:
> > >
> > > > We went through this some time a go on this list. An eye ball look at
> > this kind of test tell you NOTHING. You need to
> > > > cast the type in the type mold and then set them up on a press and try
> > printing and you will find the shrink voids and
> > > > then know that type must expand to be useful to the
> > trade!!!!!!!!!!!!!!!!!!!!!
> > >
> > > I did exactly that except that I did not find the voids you are talking
> > about. The pure lead type printed an image as
> > > sharp as the Linotype metal type.
> > >
> > > Did YOU ever try it or is all of your comments based on theory?
> > >
> > > >
> > > > Mr Grant ar you the gentelman with the home made caster with no
> > top???????
> > > > Larry Jackman
> > >
> > > My Linotype is a standard machine.  The hand mold I used to cast the
> test
> > pieces has an open top to pour the metal into.
> > >
> > > John Grant
> > >
> > >
> > > Please visit our sponsor: Budget Casting Supply
> > > http://budgetcastingsupply.com/
> > >
> > > The Home Foundrymen's Association website may be found here:
> > http://members.xoom.com/HWilkinson/index.htm
> > > It includes member project pages & links
> > >
> > > To unsubscribe from this group, send an email to:
> > > hobbicast-unsubscribe@egroups.com
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> >
> >
> > Please visit our sponsor: Budget Casting Supply
> > http://budgetcastingsupply.com/
> >
> > The Home Foundrymen's Association website may be found here:
> http://members.xoom.com/HWilkinson/index.htm
> > It includes member project pages & links
> >
> > To unsubscribe from this group, send an email to:
> > hobbicast-unsubscribe@egroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> >
> >
> >
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:  
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Rotary offsets or letterpress?
----- Original Message -----
From: "lawrence jackman" <ljack70117@...>
To: <hobbicast@yahoogroups.com>
Sent: Monday, April 02, 2001 11:04 AM
Subject: Re: [hobbicast] Crucible


> I am not and have never been a printer. As a machinist. I have help build
printing presses  But in school when our class
> visited the Salina KS news Paper, the forman who was conducting the tour,
said the type had to expand on freezing. Later
> When working as a maintenance machinist, in a print shop I was told the
same thing by the printers working there. When
> working for Web press ( maker of rotaries) I was told the same thing. In
physic class I was taught the same thing. So with
> all these teachers TEACHING ME WRONG, I will drop out of the conversation
and let the EXPERTS HAVE THE FLOOR.
> Thank you Gentleman
> Larry Jackman
> having more fun than one human should be allowed to have
>
> John Grant wrote:
>
> > lawrence jackman wrote:
>
>
> Please visit our sponsor: Budget Casting Supply
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.xoom.com/HWilkinson/index.htm
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

>
> BTW, you can get very fine detail using lost wax casting with metals that have
no part of the alloy that
> expands when cooling.
>
> John Grant

I have done lost wax casting and you get beautiful detail but you get shrinkage
every time. With brass you get 1
1/2% shrink. I have not cast lead or any thing else by lost wax so I do not know
the shrink rate. I have done
spin casting in rubber molds and got shrinkage using lead but no shrinkage using
linotype metal.
Another thing I would like to point out If you cast one part from any metal
except linotype or other printers
metal you get shrink. When it is said that printerd/linotype expands on freezing
it means it does not shrink  Not
that it gets bigger because it can never be bigger than the mold it is in.
Thank you gentleman
Larry Jackman
I do not mind change as long I can keep doing things as I do them.

In a message dated 04/02/2001 8:33:39 AM Pacific Daylight Time,
e.heritage@... writes:


> What is a gate in a mold? Gingery talks about them in his lathe book but
>

Howdy John,
When you make aluminum or copper-based castings you have to get the molten
metal from the crucible into the casting cavity. The problem is that exposure
to air and turbulence cause dross. Dross is the crap that floats on top of
the molten metal, like foam on beer. The first metal that enters the casting
cavity must be free of dross and other impurities. The gating system
basically skims the molten metal as it enters the casting. Gingerly is a
genius machinist, but he said in his book "written by an amateur for
amateurs."
Foundry 101
www.Host33.com/casting
Rupert,
Help! I made a monster burner with a few alterations. The hardware dude
wanted $25 for a 13/16 drill bit. Being of the thrifty sort, I used the
largest size I had until that went dull. Then made more holes with different
sizes trying to get the same air volume. The flame is starting about 1 inch
away from the holes, is that normal? Can you look into the 13/16 holes and
see the flame? Should I add more?
Steve in Spokane


[Non-text portions of this message have been removed]

I worked Web Press and we built rotaries. As a maintaince machinist I
repaired and adjusted letterpresses. I even repaired and adjusted motion
picture projectors. I love the terms motion pictures or movies as there
is no such thing. When you watch a "movie" what you are really seeing 48
still pictures a second and they look to the eye as if they are moving.
Isn't this world great????????
Larry
Having more fun than one human should be allowed to have.

Joe Dobson wrote:
>
> Rotary offsets or letterpress?

Nortonfan@... wrote:

> Hi Group,
>
> My first summer job was working for a newspaper that had linotype machines.
> My job entailed feeding the machines with lead bars that weighed enough to
> waste me after one shift!

Those lead pigs weigh about 26 pounds and a page full of Linotype slugs weighs
about 100 pounds.  The sterio
castings that do the actual printing weigh about 30 pounds.

A 50 page newspaper processes about 3 tons of lead a day.

John Grant

lawrence jackman wrote:

> I am not and have never been a printer. As a machinist. I have help build
printing presses  But in school when our class
> visited the Salina KS news Paper, the forman who was conducting the tour, said
the type had to expand on freezing. Later
> When working as a maintenance machinist, in a print shop I was told the same
thing by the printers working there. When
> working for Web press ( maker of rotaries) I was told the same thing. In
physic class I was taught the same thing. So with
> all these teachers TEACHING ME WRONG, I will drop out of the conversation and
let the EXPERTS HAVE THE FLOOR.

I have been told for may years, by many auto mechanics and auto shop teachers
that sugar in the gas tank does terrible things
to an engine.  But all of those people were wrong.  Sugar will not dissolve in
gasoline so the worst that will happen is a
clogged fuel filter.

There are a number of things often repeated that have no basis in fact, but they
do become urban legends.

John Grant

In a message dated 3/31/01 9:41:41 PM Pacific Daylight Time,
ljack70117@... writes:


> . The teacher told us that there was only three things that
> expanded on freezing and named them. Then ask if it was a good or bad
> thing that water did that. What do you think the answer was?????????
>

It is important that water expands on freezing, otherwise the ice cubes in
your Vodka and tonic water would sink to the bottom of the glass.  Also,  all
the ice in ice burgs and in our lakes etc would sink to the bottom and would
never melt during the summer and human life on earth would not exist, not
even the people that distill the vodka for my evening cocktail.

John Meacham
High Desert of California, Palmdale, Littlerock.


[Non-text portions of this message have been removed]

That cocktail/iceburg ice information was the most
practical thing I heard from all this expansion crap.

LL
Where everything's still frozen.

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