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In the use of glue the problems and solutions

Categories: Technical supportStars: 3Stars Visit: - Release time: 2015-06-12 09:54:00
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How to solve the dispensing machine in the industry of these problems? Specific have the following to solve the problems in the glue.

1, the size of the dispensing quantity

According to the work experience, the size of the adhesive dot diameter should be the half of bonding pad spacing, patch after adhesive dot diameter should be 1.5 times the diameter of the gel point. So you can ensure that there is enough glue to bonding elements and avoid excessive glue impregnation welding plate. Dispensing quantity depends on the length of the rotation of the screw pump to decide, practice should be based on production conditions (room temperature, glue viscosity, etc.) select the pump rotation time.

2, dispensing pressure (back pressure)

Currently used dispensing machine adopts screw pump supply dispensing needles, a pressure hose take to ensure enough supply glue screw pump for American CAMALOT5000 (for example). Too much stress on the back pressure of the resin adhesive overflow, too much; Pressure is too small will appear dispensing discontinuous phenomenon, funnelled, resulting in the defect. According to work with the quality of glue, the environment temperature to selection pressure. High temperature can make glue viscosity decreases, good liquidity, then need to trim back pressure can ensure the supply of glue.