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Sealing Water Lines in
Porcerax II with Dichtol
Before
applying Dichtol to waterlines in Porcerax, it is
imperative that all EDM fluids and other cutting oils be
completely removed from the pores of the steel. Failure
to do so greatly increases the risk of water leaks due
to the inability of the Dichtol to leach into the pores;
the contaminants will occupy the pores of the steel or
will
prohibit the Dichtol from bonding to the surfaces.
Cleaning Procedures Before Sealing Water Lines:
Step
1. Heat the block of Porcerax II to 300°F
for at least (1) one hour. This will open the pores
and thin the fluids, allowing most of the trapped
material to wick
from the steel.
Step 2. After cooling to room
temperature, soak the Porcerax II insert in an
ultrasonic cleaner (built for flammable solvents)
filled with acetone. These units have spark-proof
switches, water chillers and are temperature
monitored. This is the only recommended type
cleaner for cleaning Porcerax II.
Clean for approximately 1 to 4 hours, depending on
insert size, back flushing with filtered shop air and
changing the acetone after every hour. When the
acetone remains clear the insert should be clean.
Step 3. Dry with filtered shop air,
and let stand overnight.
Note:
In addition to the other cleaning methods, it may be
necessary to back-flush the Porcerax II inserts with
acetone, using air pressure, in order to thoroughly
clean the inserts. Care should be taken when using
solvents under pressure.
Note:
Any hot substance introduced to acetone will cause a
flash fire! Make absolutely sure the Porcerax II block
is at room temperature!
Applying
the two types of Dichtol sealant to Porcerax II
waterlines.
Step
4. Cover all water line inlets but one with a
suitable tape. After tape has been applied, stand piece
on edge and fill water line through the one remaining
open line with Dichtol "WFT" for the 7 micron
size. Use Dichtol Macro for 20 micron size. Apply tape
over the one remaining water line inlet.
Step 5. Slowly rotate the piece in all
directions to insure the Dichtol is evenly distributed
throughout the water line circuit. Let stand for 15-20
minutes.
Step 6. Remove the piece of tape from
the water line where Dichtol "WFT" was first
poured into the insert. Pour the Dichtol from the insert
back into the container for reuse.
Step 7. Let stand empty 2 hours.
Step 8. Re-tape the original hole, and
uncover a hole on the opposite side of the insert.
Step 9. Pour in Dichtol
"Macro" for all micron sizes.
Step 10. Repeat steps 5 & 6.
Step 11. Allow 24 hours drying time
before applying water pressure to the piece.
Note:
Dichtol that has cured can only be removed with
Methylene Chloride, Acetone or Dichtol Remover.
Note:
Dichtol can be obtained from Devitt Machinery, Aston,
PA. Tel: (610)494-2900.
Diamant
Metallplastic is the worldwide operating manufacturer of
Dichtol for the impregnation of micropores. For more
information on Dichtol, visit their website:
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