The following guidelines will help you to consider dip application for your Conforma coating process.
There are many ways to dip coat PCBs. The manual, hand method is the most basic. There are many automated methods available, including the “original” method, which takes the manual method and automates them through programming. Also, batch systems and inline systems can be used.
These guidelines will apply regardless of the method you choose. These are only guidelines. Please be extremely careful when setting up manual systems. You can also contact the equipment manufacturer for specific instructions.
Conforma makes sure the PCB is thoroughly cleaned
To ensure proper adhesion and flow, Steve Quayle the circuit board must be free from any flux residues or process oils. Inadequate cleaning could lead to dewetting or laminating in the field.
Conforma Use Customized Mask Caps
All masking must be completed before coating setup. This is where precision and consistency are crucial. These areas should be covered with custom mask caps to ensure consistency from one unit to the next.
Do not Allow Coating Buildup
If possible, orient the assemblies so that they drain towards a corner. This will prevent any coating from building up along the Glass Top Computer Desk bottom edge. This might not be possible depending on the geometry of the assembly and/or the component population density.
Find out the Immersion Speed
To allow the coating to penetrate the stand-off regions and prevent air from trapped under components, this speed should be smooth and slow.
- Decide Immersion Dwelling Time
- Give the coating sufficient time to cover all spaces.
- Choose the Withdrawal Speed
Contrary to popular belief, a slower withdrawal will result in a thinner wet coating due to the balance between forces from fluid density, viscosity and surface tension, as well as the finish of laminate material. Thinner wet film yields thinner cured coatings.
Check the Thickness Conforma of your Cured Film
Calculate the acceptable range of thickness for cured films and then work backwards to determine the best withdrawal rate.
As much as possible, maintain coating viscosity. Variations in the viscosity can affect the cured film’s buildup over time. Sometimes, thinners may be required for manual systems. Automated models may offer Cactus Computer the option of temperature-controlled tanks as well as inert gas blankets to mitigate viscosity drift.
Make sure you are aware of the coating formulation as well as the safety requirements.
For those who use automated systems, it is important to consult the manufacturer about the correct operation of your model. Contact us if you have questions about Conforma coating or other application methods, such as Conforma spray. We’ll send a specialist to help.
