Ivoclar Vivadent IPS InLine System - Manual (Page 62)

62
Preheating
After the stipulated setting time of the respective investment material (IPS PressVEST or IPS PressVEST Speed), the invest-
ment ring is prepared for preheating as follows:
– Remove the ring gauge and ring base with a turning movement.
– Carefully push the investment ring out of the IPS Silicone Ring.
– Remove rough spots on the bottom surface of the investment ring with a plaster knife. Check the 90° angle. Investment
material residue must not enter the sprues. Blow into the sprues if necessary.
– If several investment rings are preheated together, mark them with the respective ingot shade.
– When placing several investment rings in the preheating furnace using the Speed method, make sure that the furnace
temperature does not drop too much.
Setting time
Preheating furnace temperature
Position of the investment ring in
the furnace
IPS InLine PoM ingots
IPS Alox plunger/IPS One-Way
plunger 300g
Holding time at final temperature
850°c/1562°f
Important
IPS PressveSt
min. 60 min
Start room temperature heat up
to 850 °C/1562 °F / 5 °C/9°F min
towards the rear wall, tipped with the
opening facing down
at least 90 min
IPS PressveSt Speed
min. 30 min, max. 45 min
Direct 850 °C/1562 °F
towards the rear wall, tipped with the
opening facing down
at least 90 min
If several Speed investments are to be
conducted, they should be invested
consecutively and placed into the pre-
heating furnace at an interval of
approximately 20 minutes. Make sure
that the furnace temperature does not
drop too much when placing the
investment rings into the preheating
furnace. The stipulated holding
time counts from the point when the
preheating temperature has been
reached again.
In order to ensure smooth working procedures in the laboratory on a daily basis, impeccable functioning of the infra-
structure, particularly the preheating furnaces, is essential. This includes their maintenance, cleaning with a vacuum
cleaner in a cool state as well as regular checks of the temperature controls and heating elements, etc. by the manufacturer.
Position the heating muffle towards the rear wall, tipped with the opening
facing down Do not preheat the IPS InLine PoM ingot and the IPS One-Way plunger.
no preheating
no preheating