According to the actual customer case, Vsmile will analyze the reasons for the "long bridge deformation" with you.
Long bridge deformation case analysis:
Causes of deformation:
A, the firing time is too short
B, fired with too many crowns
C, not fully dried after dyeing
D, the strength and thickness of the designed crown are not enough
E, the setting of the sintered plate is not strong enough
Solution:
A: Extend the sintering curve, preferably for more than ten hours
B: The long bridge should be fired separately. Most goods should be fired together with the crown. It should not be too close to the long bridge.
C: Extend the drying time. The long bridge and sintered plate need to be dried for more than one hour
D: When designing, try to thicken the connection part as much as possible
E: Set the sintering plate according to the following drawings
|
HT/ST /ST Color/STML Sintering Curve (10 units) |
||||
|
Sintering step |
Start Temperature(℃) |
End Temperature(℃) |
Time(Min) |
Rate(℃/Min) |
|
Step 1 |
20 |
300 |
30 |
9.3 |
|
Step 2 |
300 |
1200 |
190 |
4.7 |
|
Step 3 |
1200 |
1530 |
150 |
2.2 |
|
Step 4 |
1530 |
1530 |
120 |
0 |
|
Step 5 |
1530 |
800 |
120 |
-6 |
|
Step 6 |
800 |
natural cooling 20 |
120 |
-6.5 |
