打胶机点胶时的常见缺陷的存在，如果不及时处理，很容易在生产中造成质量问题，甚影响各种性能的展示。那么下面就来讲讲相关内容吧。

If the common defects of the glue dispenser are not handled in time, it is easy to cause quality problems in production and even affect the display of various performances. Now let's talk about the relevant content.

胶水的牵拉和拖尾是点胶过程中的普遍现象。即使是专为高速点胶而配制的胶水也可能出现拉丝现象，胶水更容易脱落，还可能造成虚焊等。这可能是因为打胶机设备的工艺参数调整不当，比如针头内径太小、点胶压力太大、针头与PCB距离过大等。

The pulling and trailing of glue is a common phenomenon in the dispensing process. Even the glue specially prepared for high-speed dispensing may cause wiredrawing, which makes the glue easier to fall off, and may also cause faulty welding. This may be due to improper adjustment of process parameters of the glue applicator equipment, such as too small inner diameter of the needle, too large dispensing pressure, too large distance between the needle and PCB, etc.

另一个原因可能是对胶粘剂的性能了解不够，胶粘剂与应用工艺不兼容，或者胶粘剂质量差、粘度变化或已过期。拉线/拖尾也可能是由其他原因引起的，例如对板的静电放电、板的弯曲或板的支撑不足等。

Another reason may be the insufficient understanding of the properties of the adhesive, the incompatibility between the adhesive and the application process, or the poor quality, viscosity change or expired of the adhesive. The stay wire / tailing may also be caused by other reasons, such as electrostatic discharge to the plate, bending of the plate or insufficient support of the plate.

针对以上原因，可以调整工艺参数，更换内径较大的针头，降低点胶压力，调整针头距离PCB的高度；同时检查所用贴片胶的生产日期、胶的性能和使用要求，是否适合该工艺、涂层等。如果贴片胶确实变质，可以更换。此外，实践证明，控制拉丝/拖尾的好的方法是在点胶针上或附近加热，以降低粘度，贴片胶易断裂，不会产生拉丝/拖尾。

For the above reasons, the process parameters can be adjusted, the needle with larger inner diameter can be replaced, the dispensing pressure can be reduced, and the height between the needle and PCB can be adjusted; At the same time, check the production date of the used patch adhesive, the performance and use requirements of the adhesive, and whether it is suitable for the process, coating, etc. If the patch adhesive is indeed deteriorated, it can be replaced. In addition, practice has proved that a good way to control wire drawing / tailing is to heat on or near the dispensing needle to reduce the viscosity. The patch adhesive is easy to break and will not produce wire drawing / tailing.

没有时间打印或胶量太少。点胶时有一点点胶动作，但没有出胶或针头出胶太小。可能是贴片胶中混入了气泡，针头被堵住，或者生产线气压不够。这时候注射器内的胶水要去泡，尤其是自己装的胶水。经常更换干净的针头，适当调整机器压力。如果经常发生堵塞，可以考虑更换其他的贴片胶。

No time to print or too little glue. There is a little glue action during dispensing, but there is no glue output or the glue output of the needle is too small. It may be that bubbles are mixed in the patch adhesive, the needle is blocked, or the air pressure of the production line is not enough. At this time, the glue in the syringe should be soaked, especially the glue installed by yourself. Always replace clean needles and properly adjust the machine pressure. In case of frequent blockage, consider replacing the patch adhesive of other brands.

明显不连续的胶点。双组份打胶机厂家认为不连续的点尺寸会影响组件和PCB之间结合强度的整体一致性。出现这种现象的原因如下：针的顶针落在垫子上，换一根针就可以解决问题；恢复时间也不够。增加延迟可以解决恢复问题。然后或随着胶面水平下降，压力时间不足以完成点胶周期，可以通过增加压力与周期时间的比例来纠正胶点尺寸不连续的问题。

Obviously discontinuous glue spots. The manufacturer of the two-component glue applicator believes that the discontinuous point size will affect the overall consistency of the bonding strength between the component and PCB. The reasons for this phenomenon are as follows: the thimble of the needle falls on the mat, and changing a needle can solve the problem; Recovery time is not enough. Increasing latency can solve the recovery problem. Then, or as the glue surface level drops, the pressure time is not enough to complete the dispensing cycle. The problem of discontinuous glue dot size can be corrected by increasing the ratio of pressure to cycle time.

打胶机点胶时的常见缺陷在这里讲解了三个方面的内容，您可以关注我们网站www.jntiannuo.com了解咨询的更多。

The common defects of the dispenser during dispensing are explained in three aspects here. You can pay attention to our website www.jntiannuo Learn more about consulting.