Spark Issue on DJ2600 HVOF Flame
01-06-2022, 02:38 PM,
#1
Spark Issue on DJ2600 HVOF Flame
Dear All;

We have Oerlikon multicoat system and we added the HVOF and Flame coatings. Now we are using Plasma HVOF and Flame process in the same cabin.

Therefore we have added new components and changed the gas lines.

Our problem is that  there are too many spark in the HVOF. We don't have any spark in the Plasma and Flame. Please watch the below video. Our gun is DJ2600 and gasses are oxgyen and hydrogen.

Oerlikon changed too many parts but there is no changing. In the flame there is no powder and we can see the diamond label in the flame. 

Is there any suggestion how we can fix the problem ?

https://www.youtube.com/watch?v=ysLMXH5EGj0
Reply
02-06-2022, 06:59 AM,
#2
RE: Spark Issue on DJ2600 HVOF Flame
Hi Gulkokan
I have some question to you, is there some technologic problem in the coating? like unfused or oxides or others? if not, the sparks as you call, seems that are not from the inside of the flame, like barrel or powder from the powder feeder, so as HVOF system has higher flame velocity, and maybe there are turbulences inside the cabin and the flame pulls powder from the environment
Best regards
Luigi
Reply
02-07-2022, 06:04 PM,
#3
RE: Spark Issue on DJ2600 HVOF Flame
(01-06-2022, 02:38 PM)xxxxmgulkokan Wrote: Dear All;

We have Oerlikon multicoat system and we added the HVOF and Flame coatings. Now we are using Plasma HVOF and Flame process in the same cabin.

Therefore we have added new components and changed the gas lines.

Our problem is that  there are too many spark in the HVOF. We don't have any spark in the Plasma and Flame. Please watch the below video. Our gun is DJ2600 and gasses are oxgyen and hydrogen.

Oerlikon changed too many parts but there is no changing. In the flame there is no powder and we can see the diamond label in the flame. 

Is there any suggestion how we can fix the problem ?

https://www.youtube.com/watch?v=ysLMXH5EGj0

Hi,


Sparks may be from the powder remaining on the walls of the powder supply tube. 
However, the trajectory of the sparks seems to indicate otherwise.
Check the powder injector (Tungsten Carbide).
During operation the injector is easily consumed (burned) and produces these sparks, especially when it is new and has insufficient cooling.
Over time these sparks will disappear, after the powder injector will be consumed (shortened) 1-2 mm

Ion
Reply




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