PCB (Printed Circuit Board) is a crucial electronic component that serves as both the physical support for electronic elements and the provider of their electrical connections.
Below are 7 key considerations for using dispensing machines on PCBs:
Nozzle Selection: Nozzle specifications directly impact glue discharge volume and precision. Within a certain air pressure range, larger nozzle diameters result in higher output. Select nozzle size based on product requirements, with the ideal inner diameter generally being half the desired dot diameter.
Nozzle-to-PCB Distance: Different machines use different nozzles, some with limited mobility. Calibrate the Z-axis height before each operation to ensure proper clearance.
Dispensing Duration: Dispensing volume is determined by the duration of glue ejection. Longer dispensing times increase volume, ensuring sufficient adhesion while preventing waste from over-application.
Pressure Control: Pressure directly affects glue flow rate and output. Higher viscosity adhesives require greater pressure. Adjust pressure based on ambient temperature, required volume, and adhesive properties using the machine's internal regulator.
Curing Process: Manufacturers typically provide temperature curves for adhesive curing. While most adhesives cure at room temperature, higher temperatures are recommended for optimal bond strength and hardness.
Bubble Prevention: Air bubbles significantly impact quality and yield. Eliminate all air from adhesive before use to prevent defective products and false dispensing. Proper degassing is essential.
Anti-Drip Mechanism: Install a vacuum suction valve to prevent leakage during machine idle periods. Proper adjustment of this component effectively controls both dripping and stringing.
We hope these insights prove helpful for your operations.
About Jiuju Automation:
As a national high-tech enterprise with nearly a decade of experience in R&D and manufacturing of dispensing equipment, Jiuju Automation possesses extensive technical expertise. Our main products include fully automatic dispensers, precision dispensers, circular dispensers, oval two-axis dispensers, and related peripheral equipment.
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