|
 |
 |
 |
|
1. For cases
where space is limited, bevel
impression as shown to produce larger area for pin holes. |
|
2. Pour up
impression with die-stone of choice (not refractory
material). |
|
3. Remove
model from impression, trim, and drill holes in bottom of
model using pin-dexing machine. Allow for adequate spacing
between pins. |
|
|
 |
 |
 |
|
4. Try pins in
to assure there is adequate spacing. Pins may touch as
long as they are fully sealed. If any pins overlap, red
rill holes to properly align. |
|
5. Mandibular
pins have male parts that are offset for rotating their
placement in an overlapping pattern. Their triangular
shape should alternate as shown in diagram. |
|
6. Apply stone
separator of choise and allow to dry. |
|
 |
 |
 |
|
7. Place 1
drop of uni-bond on pins and fully seat on model.
Allow 10 minutes to dry. |
|
8. Place
sleeves on pins, making sure they are fully seated. A
portion of pin will remain exposed. To insure accuracy,
sleeves should not be touching. |
|
9. Place in
appropriately sized base former and pour up with basing
stone. Make sure stone has adequately infiltrated space
between sleeves and portion of pin still exposed by the
fully seated sleeves. |
|
 |
 |
 |
|
10. When dry,
the base stone should cleanly cover the top of sleeves in
a smooth funnel shape. Do not remove this stone. It is
there to insure accurate seating. |
|
11. After
pulling pinned model from base, separate individual dies
and trim. |
|
12. Trim
individual dies all the way to the edge of pin. Do not
leave a shoulder. The funnel shape of pins will match the
funnel impression in base for an accurate and stable fit. |
|
 |
 |
 |
|
13. IMPORTANT!
Steam clean pins. To avoid contamination, do not reinsert
pins into sleeves prior to duplicating. |
|
14. Place
individual dies in duplicating flask. Make sure the dies
do not touch the clear flask. if any do, adjust the angle
of die while maintaining a snug fit. |
|
15. Mix equal
amounts of uni-sil base and catalyst slowly to avoid
bubbles and pour in flask from a height of 30cm. Allow to
set for 20 minutes. |
|
 |
 |
 |
|
16. Remove
silicone ring from flask pins from silicone ring. |
|
17. Pour up
using refractory material of choice per manufacturers
instructions. |
|
18A. After
appropriate setting time, pull dies from mold. To grip
die, push out from bottom and grab from top. Silicone is
very flexible. |
|
 |
 |
 |
|
18B. Pull die
out and away from center of ring. Do not rock from side to
side. |
|
19. An
alternative technique would be to blow the dies loose with
compressed air. Caution, they will rapidly launch from
ring. |
|
20. Trim off
funnel shaped ends with a separating disc. |
|
 |
 |
 |
|
21. Place
refractory dies on firing tray and degas per manufacturers
instructions. |
|
22. Place
distilled water into the reservoir of the organizer. This
will allow refractory dies to remain properly humidified
for porcelain application. |
|
23. Original
die and refractory die are now interchangeable on same
base. |
| |