Table of Contents
Advertisement
Holders
alignment and
functionality
This procedure describes how to ensure that both the crucible and mold holders
are properly positioned, and in working condition.
1. Procedure preparation
2. Inspection of the holders
However, such methods should not be applied for too long; metal parts should
be removed from cleaning solution immediately when separated from
ceramics.
Note: These methods will remove the protective oxide layer, and so re-cooking
the bare metal parts at 1000°C for an hour in a clean oven is highly
recommended.
1.1
Let the instrument cool down, and turn it off.
1.2
Unplug it from the power outlet.
2.1
Verify that holders are perfectly horizontal.
2.2
Verify that flux spillage is not present on holders anywhere. (Refer to
appropriate section in case flux deposits are found.)
2.3
Verify that crucibles holder is free to rock and pour into the molds,
without rubbing or hitting anything. To do so, manually move the
crucibles holder to simulate the movement of rocking and pouring.
2.4
Verify that the crucible holder ceramic tubes, those crossing from left to
right BlackDisk end-plates remain very gently compressed, so that the
ceramic tubes cannot move freely sideways.
2.5
Using the appropriate tools, verify that screws that are used to secure
the cantilever ceramic rods supporting the mold holders are well
tightened.
2.6
Manually open the door and gently push the holders inside the furnace.
Then, verify that mold holders have enough free space to move inside
the furnace slots. A minimum clearance of 1 mm should be observed in
all directions.
2.7
Keeping the door open and the holders inside the furnace, verify that the
crucible holder is free to rotate inside the two furnace slots. Verify that
when crucible holder is in horizontal position, it can move freely through
the slots during sliding operation. A minimum clearance of 1 mm should
be observed in all directions.
2.8
In the case that an adjustment or replacement need to be done, please
refer to the appropriate section of the Service operations chapter (see
page 60).
2.9
A complete adjustment verification can be done by referring to page 68,
Adjustment of holders.
55
Advertisement
Table of Contents
