With the continuous development of the electronic industry, as many products in the electronic industry, dispensing machines are used for dispensing and packaging. Of course, there are so many industries in the market. Dispensing machines are not only used in the electronic industry, such as LED outdoor lighting, automotive electronics, communication electronics, solar energy and other industries. Among them, there are some tips in the use process.

在设备使用过程中，如果胶水用完，点胶阀内会有空气。

During the use of the equipment, if the glue is used up, there will be air in the dispensing valve.

1.检查软管是否已超过有用使用时间。

1. Check whether the hose has exceeded the useful service time.

2.如果有这样的情况，将点胶阀或点胶泵清理干净，同时按照相关操作步骤进行操作。

2. If there is such a situation, clean the dispensing valve or dispensing pump, and operate according to relevant operation steps.

3.关闭分配器，同时打开阀门，取下冷却套。

3. Close the distributor, open the valve and remove the cooling jacket.

4.然后取下气压头。

4. Then remove the pneumatic head.

5.下一步是取下软管时，要检查点胶阀上是否还有弯头管件，前提是弯头管件可用。

5. The next step is to check whether there are elbow fittings on the dispensing valve when removing the hose, provided that the elbow fittings are available.

6.取下胶管，将点胶阀锁在适配器底部时，会有少许空腔。如果有这样的情况，可以用旧软管中的胶体填充空腔，并检查是否有气泡。如果出现气泡，用新的软管将气泡填满，然后坚持是否了气泡。如果仍然有气泡，考虑更换新的软管。

6. Remove the hose and lock the dispensing valve at the bottom of the adapter, there will be a little cavity. If this is the case, fill the cavity with the colloid in the old hose and check for bubbles. If bubbles appear, fill them with a new hose, and then insist whether the bubbles are eliminated. If there are still bubbles, consider replacing the hose with a new one.

7.在这里我们不得不说，更换胶管取决于凝胶的流动性是否合适。不能从头到尾出现气泡，因为气泡会造成滴漏、胶点重量变化等问题。因此，在更换胶管或填充过程中经常会出现气泡。

7. here we have to say that replacing the hose depends on whether the mobility of the gel is suitable. Bubbles shall not appear from beginning to end, because bubbles will cause problems such as dripping and leakage, change of glue dot weight, etc. Therefore, bubbles often appear in the process of replacing the hose or filling.

8.因此，更换胶管时，切记不要让空气进入胶体通道。如发现空气残留，且不确定空气是否通过胶管进入点胶泵，请按以下步骤更换胶管:

8. Therefore, when replacing the hose, remember not to let air enter the colloid channel. If air remains and it is uncertain whether the air enters the dispensing pump through the hose, replace the hose as follows:

1)检查点胶阀上连接软管的适配器。主要检查是否有胶体溢出，如有，擦去。

1) Check the adapter connecting the hose on the dispensing valve. Mainly check whether there is colloid overflow. If so, wipe it off.

2)重新安装气动头。

2) Reinstall the pneumatic head.

3)再将软管冷却套重新安装。

3) Reinstall the hose cooling sleeve.

4)关闭饮水机门。

4) Close the water dispenser door.

5)重新启动分配器。

5) Restart the distributor.

需要注意的是要有足够的排胶时间，使新胶管中的胶水顺利流出点胶头，并确认点胶阀的压力和速度都是按照理想状态设定的。然后测量胶体流速，直到连续两次测量的误差在正负2%的范围内。

It should be noted that there should be enough glue discharge time to make the glue in the new hose flow out of the dispensing head smoothly, and confirm that the pressure and speed of the dispensing valve are set according to the ideal state. Then measure the colloid flow rate until the error of two consecutive measurements is within the range of plus or minus 2%.