Develops of multi-dot matrix micro-nozzle dispensing system

A multi-dot matrix glue dispenser with multi-nozzle glue dispensing system was developed.A five-step dispensing method was designed for dispensing experiment, in which the arrangement of glue points is medium-density and outer-sparse.Four types of dispensing nozzle were developed and used in the experiments.The roundness of dispensing points of each type of nozzle was compared and analyzed.The glass bonding experiment was carried out, and the mechanism of bubble formation during bonding was studied.The results show that the dispensing machine can finish 21 gule points in 15 s at the same time, and the type-3 nozzle can ensure the minimum roundness of the glue point.The smaller the roundness of the glue point, the more conducive to the expansion synchronization of the glue point between the two glass sheets when being extruded, which is conducive to ensuring the smooth exhaust channel, so as to ensure no bubble retention between the bonded glass sheets.