The difference between piezoelectric injection valve and pneumatic injection valve

The dispensing machine equipment can be equipped with many dispensing valves for dispensing, including jet valves, spiral valves, diaphragm valves, screw valves, high-precision dispensing valves, etc. However, when selecting dispensing machine equipment, it is necessary to consider the field regulations and glue characteristics. For example, LED dispensing needs to be based on the current field regulations and glue characteristics to select a suitable dispensing valve. To achieve accuracy, jet dispensing valves can be selected; Component glue, can choose dual component point glue valve; Low viscosity adhesive, use silicone rubber dispensing valve. The principle of each valve is different, and JEENOCE analyzes the key principle of jet dispensing valves at present.

The piezoelectric spray valve can be equipped with a control board to achieve current adjustment liquid control method, ensuring accurate painting inside the light-emitting diode. Each point is very accurate, and the difference depends on 0.2%. The standard air pressure and current dual working pressure method is used, and the glue spraying rate is very fast. This is the principle of the spray glue valve. However, it also has a characteristic that it is easy to clean and not easy to damage. Basically, all sealing rings are not suitable, and other parts do not need to be replaced.

Due to the relatively high difficulty coefficient of operating low viscosity liquids, it is difficult to regulate their application in some difficult fields, especially for liquids with viscosity below 1000 centipoise. Generally, the use of this type of glue in rubber valves will cause the problem of glue flow. Due to the lower sealing performance of general rubber valves, it is not possible to apply low viscosity glue, which is normal. The key to designing this piezoelectric injection valve is for low viscosity adhesive.