Mike W1
12-13-2014, 09:48 PM
Fooling around in the shop today with some new alloy and here's my notes
on what I gleaned from a TC hooked to the mould. My guess is my JB Weld
scheme and hitting the hinge pin on the mould aren't real compatible. It
did last through one potful though and I found it interesting. Not all
conclusive and it's not the temperature in the center of the mould but
still of some little value to me at least.
Kind of 2 tests. I've been real happy with the warming shelf that is
attached to the top of my pots. This let me relate as to how well
it actually heats the mould.
Previous tests with the TC hooked to the bottom of the warming shelf
showed it hit a maximum temperature of about 300° F
JB Welded a piece of 1/2" aluminum to side of #452374 mould that was
tapped for a 6M threaded TC. Set PID to 710°
Hooked TC to mould and cast a pot full. Didn't have mould on shelf for the
full heating period for warmup but it was showing around 200°. Then I
ran about 3 cycles and it was hovering around 298-300°. When sprue
started to cut a little too easily it was 310°. Turned on cooling fan and
mould temp stayed around 296-300°.
When pot was getting low set the mould on the warming shelf and let the pot
heat back up adding about 6 ingots. Mould dropped down to 265° while
this was going on and seemed to be staying about there. A couple casts
brought it right back up to temp and then the JB Weld let loose thus
losing my TC hookup to the mould.
http://i171.photobucket.com/albums/u310/Mike4245/HPIM1075.jpg
http://i171.photobucket.com/albums/u310/Mike4245/001_zps55f315b3.jpg
on what I gleaned from a TC hooked to the mould. My guess is my JB Weld
scheme and hitting the hinge pin on the mould aren't real compatible. It
did last through one potful though and I found it interesting. Not all
conclusive and it's not the temperature in the center of the mould but
still of some little value to me at least.
Kind of 2 tests. I've been real happy with the warming shelf that is
attached to the top of my pots. This let me relate as to how well
it actually heats the mould.
Previous tests with the TC hooked to the bottom of the warming shelf
showed it hit a maximum temperature of about 300° F
JB Welded a piece of 1/2" aluminum to side of #452374 mould that was
tapped for a 6M threaded TC. Set PID to 710°
Hooked TC to mould and cast a pot full. Didn't have mould on shelf for the
full heating period for warmup but it was showing around 200°. Then I
ran about 3 cycles and it was hovering around 298-300°. When sprue
started to cut a little too easily it was 310°. Turned on cooling fan and
mould temp stayed around 296-300°.
When pot was getting low set the mould on the warming shelf and let the pot
heat back up adding about 6 ingots. Mould dropped down to 265° while
this was going on and seemed to be staying about there. A couple casts
brought it right back up to temp and then the JB Weld let loose thus
losing my TC hookup to the mould.
http://i171.photobucket.com/albums/u310/Mike4245/HPIM1075.jpg
http://i171.photobucket.com/albums/u310/Mike4245/001_zps55f315b3.jpg