In dispensing, the size of the adhesive point must be controlled according to the base material to be dispensed, and it should not be less glued or overflowed. The following dispenser manufacturers begin to discuss how to control the size of the dispenser and improve the quality of the dispenser.

 

Reciprocating suction dispensing valve

 

Regarding the size of the dot in the automatic dispensing machine, the distance between the dispensing needle and the base plate and the inner diameter of the needle are important parameters. The dispensing machine manufacturer reminds that if the distance between the needle and the base plate is incorrect, the operator will never get the correct dispensing result. When other parameters remain unchanged, the larger the distance between the dispensing needle and the circuit board, the smaller the diameter of the dispensing needle represents the higher the height, the smaller the distance between the dispensing needle and the circuit board, and the larger the diameter of the dispensing needle, the lower the height of the dispensing point.

 

Anaerobic Adhesive Coating Valve

 

The control of adhesive dot size can be seen from the diameter, which is determined by the inner diameter of the needle and the distance between the needle and the base plate. When the inner diameter of the needle is the same, if the distance between the needle and the base plate changes, although the dispensing amount is exactly the same, different point diameters and shapes can be obtained. However, by changing the height of the dispensing needle to control the size of the dispensing point there are certain limits. The diameter of the adhesive point should not be less than or equal to the inner diameter of the needle used. This is due to the relative force between the surface tension (f1) between the glue and the needle and the surface tension (F1) between the glue and the base.