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点胶机的针头与胶水使用时应该注意啥?

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  本身就是控制分配胶机吐痰和吐出的设备,因此使用点胶机势必影响到电动胶的质量问题解决:胶方面的胶水,胶水不能有气泡,小气泡会导致大量的焊盘没有胶水,空现象,可能导致不合格的产品。
  It is the equipment to control the spitting and spitting of the dispensing glue machine. Therefore, the use of the dispensing machine will inevitably affect the quality problem solving of the electric glue: the glue in the aspect of glue, the glue can not have bubbles, small bubbles will lead to a large number of pads without glue, empty phenomenon, which may lead to unqualified products.
  所以每更换一半的胶管必须空接,关于胶的固化,一般厂家都给出了温度曲线。在实践中应尽量选择温度较高的固化,使固化后的胶水达到强度要求。
  Therefore, every half of the rubber tube to be replaced must be air jointed. For the curing of the rubber, the general manufacturer has given the temperature curve. In practice, we should try our best to choose a high temperature curing to make the cured glue meet the strength requirements.
  胶粘剂的粘度直接影响着胶液的质量。粘度高,上胶点小,拉丝均匀;粘度小时,胶点会变大,然后可能渗到胶垫上。在配胶过程中,对不同粘度的胶应选择合理的背压和配胶速度。
  The viscosity of adhesive directly affects the quality of glue solution. The viscosity is high, the glue point is small, and the drawing is even; when the viscosity is small, the glue point will become larger, and then it may seep onto the rubber pad. In the process of dispensing, a reasonable back pressure and dispensing speed should be selected for different viscosities.
  除去胶水和外部环境的影响,关于点胶机本身,一般企业点胶机都是选用螺杆泵点胶针。
  In addition to the influence of glue and external environment, as for dispensing machine itself, screw pump dispensing needle is generally used in enterprise dispensing machine.
  因此,需求采用恒压,保证螺杆泵能满足胶水供应。如果压力过小,就会出现间歇点胶、渗漏的现象,进而造成缺陷。
  Therefore, constant pressure is required to ensure that the screw pump can meet the glue supply. If the pressure is too small, there will be intermittent dispensing and leakage, which will cause defects.
  所以应根据胶液质量的不同,分胶机工作环境的温度来选择压力。较高的环境温度会使胶水粘度变小,流动性更好,这时需要减少背压以保证胶水的供应,反之亦然。
  Therefore, the pressure should be selected according to the temperature of the working environment of the dispenser according to the quality of the glue. Higher ambient temperature will make the glue viscosity smaller and fluidity better. At this time, it is necessary to reduce the back pressure to ensure the supply of glue, and vice versa.
  在实践中,我们认为针的内径尺寸应该是点胶点直径的1/2,这是更理想的点胶方式。因此,在点胶过程中,应根据PCB上焊盘的大小选择点胶针,以保证点胶点的质量,提高生产功率。
  In practice, we think that the inner diameter of the needle should be 1 / 2 of the dispensing point diameter, which is the most ideal dispensing way. Therefore, in the dispensing process, the dispensing needle should be selected according to the size of the pad on the PCB to ensure the quality of the dispensing point and improve the production power.
济南双组份打胶机
  不同的配药器选用不同的配针,有些配针有一定程度的停药。在每一次操作的开始,都要对针与PCB之间的间距进行校准,即z轴高度校准,这一点往往被忽略。
  Different dispensing devices choose different dispensing needles, some of which have a certain degree of drug withdrawal. At the beginning of each operation, the clearance between the pin and PCB should be calibrated, that is, z-axis height calibration, which is often ignored.
  根据操作经验,胶点直径应为焊盘距离的一半,补片后的胶点直径应为胶点直径的1.5倍。
  According to operation experience, the diameter of glue point shall be half of the distance between pads, and the diameter of glue point after patch shall be 1.5 times of the diameter of glue point.
  这确保有足够的胶水来保持元件在一起,并防止过多的胶浸渍垫。上胶量由螺杆泵的旋转时间决定。实际使用时,应根据室温和胶水的粘度来选择泵的旋转时间。
  This ensures that there is enough glue to keep the components together and to prevent excessive glue impregnation. The amount of glue is determined by the rotation time of screw pump. In actual use, the rotation time of the pump should be selected according to the room temperature and the viscosity of the glue.

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