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How to deal with the leakage of dispensing machine?

Release time: August 5, 2019 17:11:02 source: http://1xuewen.com
  How to deal with the leakage of dispensing machine?
In the process of dispensing, due to the low concentration of glue, glue will drop from the needle automatically
 Production process.
 The way to deal with this problem is to use the suction function. When there is no dispensing, negative pressure is formed by suction,
 Keep the glue from dripping.
Dispenser common problem
Dispenser The most common problem is the valve problem, the following is to deal with the problem of rubber valve
 It works.
This phenomenon often occurs after the rubber valve is closed. 95% of this is because of the needle used
 The diameter of the head is too small.
If the needle is too small, it will affect the movement of liquid and form back pressure. As a result, the rubber valve will leak soon after closing
 Phenomenon. If the needle is too small, it will also affect the exhaust bubble action when the rubber valve is put into use
 This problem can be dealt with. The back pressure of the conical oblique needle is the least, and the liquid movement is the most smooth. Air in liquid
 After the rubber valve is closed, there will be leakage phenomenon. It is better to clean the air in the liquid in advance, or change to not easy to contain air
 Foam glue. Or the glue centrifugal defoaming before use.
The glue size is not consistent
When the glue is inconsistent, it is mainly caused by the unstable pressure of the pressure cylinder or air.
The inlet pressure regulator should be set at 10 to 15 psi lower than the minimum pressure in the plant, and the pressure used by the pressure cylinder should be
 If the pressure is above the middle of the pressure gauge, the low pressure part of the pressure gauge should be avoided.
The operating pressure of the rubber valve should be at least 60 psi to ensure the stability of glue delivery.
Finally, the time of glue out should be checked. If it is less than 15 / 1000 seconds, it will be unstable. The longer the time is, the longer the time will be
 The more stable.
The flow is too slow
If the flow rate is too slow, the pipeline should be changed from 1 / 4 "to 3 / 8".
If there is no need for the pipeline, the shorter the better.
In addition to changing the pipe, it is necessary to change the rubber outlet and air pressure so as to completely accelerate the flow rate.
Bubbles in fluid
If the pressure of fluid is too high and the valve opening time is too short, air may enter the liquid
 Reduce fluid pressure and use a tapered, oblique needle.
Glue clogging
This kind of scene is mainly due to excessive moisture or repeated use of instant glue. Make sure to use fresh instant glue.
 Clean the line thoroughly with aceton acetone without moisture. The air used should be confirmed to be dry and in the factory
 Filter is installed between air pressure and rubber valve system. (if the above methods are still ineffective, nitrogen should be used).