How To Control The Quantity Of Glue Dispenser?

The amount and pressure of the automatic dispensing machine, the amount of glue, the time of the glue, the speed of the equipment, the size of the nozzle and so on.

Under the same conditions, the greater the pressure, the greater the amount of glue;

Under the same conditions, the longer the glue time, the more glue;

Under the same conditions; The slower the equipment running speed, the more glue;

Under the same conditions, the larger the inner diameter of the nozzle, the more glue; So it can be adjusted and controlled from these aspects.

Equipment factors affecting the amount of glue

A, dispensing machine glue time setting

According to work experience, the size of glue point diameter should be half of the product spacing. This ensures that there is enough glue to hold the components together and avoids overgluing. The amount of dispensing is determined by the length of time set by the automatic dispensing machine. In practice, the dispensing time should be selected according to the production situation (room temperature, viscosity of glue, etc.).

B. Pressure setting of the dispensing machine

Dispensing equipment to needle or glue gun to provide a certain pressure to ensure the supply of glue, pressure determines the amount of glue and glue flow rate. Too much pressure is easy to cause glue overflow and too much glue; Pressure is too small will appear intermittent phenomenon and leakage point, resulting in product defects. The pressure should be selected according to the nature of the glue and the temperature of the working environment. High ambient temperature will make the viscosity of glue smaller, better fluidity, then need to lower the pressure value, and vice versa.

C, the size of the needle of the dispensing machine

In practice, the diameter of the needle should be about 1/2 of the diameter of the glue point. In the process of dispensing, the needle should be selected according to the size of the product. Different needles should be selected for products with different sizes, so as to ensure the quality of glue points and improve production efficiency.

Dispensing, dispensing needle and circuit board distance and needle diameter is the most important parameters. If the distance between the needle and the substrate is not correct, the operator will never get the correct dispensing result. In the case of other parameters unchanged, the greater the distance between the dispensing needle and the circuit board, the smaller the diameter of the dispensing point, the higher the height of the dispensing point; The smaller the distance between the dispensing needle and the circuit board, the larger the dispensing diameter, the lower the dispensing height.

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