Many PCBA assembly factories usually meet one same problem-Dirty stencil clean!This a simple thing but really headachy.
Cut the cackle,Today I will introduce three ways for cleaning SMT stencil:
1.Manually soak:
Tools and materials: Cleaning agent,Duster cloth,Special gloves,Container
Cleaning step:
1)spray cleaning agent on the stencil or soak the stencil in a container for a while(if the solder have condensed into pieces).
2)Putting on gloves and use duster cloth to swab down the dirty part with solder paste.
3)Drying by compressed air
4)checking:
2.Pneumatic spray cleaning
Tools and materials: Pneumatic stencil cleaning machine,Cleaning agent,Special gloves
Cleaning Step:
1)Starting air compressor
2)Setting up the cleaning time,drying time
3)Put in stencil and leave to do other work
4)Get stencil out after coming back and put in another one
3.Ultrasonic cleaning
Tools and materials:Ultrasonic stencil cleaner machine,Cleaning agent
Cleaning Step:
1)power on
2)Put in stencil and setting cleaning time and drying time
3)Get stencil out and put in another one
Compare the three ways:
Manually soak:
Advantage:
1)Low-cost
2)Visualization
Disadvantage:
1)Long tine,low-effective
2)High salary cost
3)Cleaning effect is not very good
4)May hurt stencil
Pneumatic spray cleaning:
Advantage:
1)Pneumatic,Automatic,without power
2)High-effective
3)Cleaning effect is good
4)Economize manpower
Disadvantage:
1)Can’t cleaning oversized stencil
2)Cleaning effect is not good with thick stencil
3)Need certain cost to buy machine
Ultrasonic cleaning
Advantage:
1)Automatic
2)High effective
3)Cleaning effect is good
Disadvantage:
1)Need one stuff cooperate
2)High cost
3)Can’t cleaning oversized stencil
