Colloid jet printing head and colloid jet method

Abstract

The invention discloses a colloid jet printing head, which comprises: a base body, a base connected to the base body, and a piezoelectric driving device arranged on the base body; the base includes a colloid flow channel, a liquid injection port and a nozzle at the bottom of the flow channel; The piezoelectric driving device includes: a piezoelectric ceramic column, a displacement amplifier and a striker, the displacement amplifier is in contact with the top of the striker, and the lower part of the striker is accommodated in the flow channel of the base; the piezoelectric ceramic column is in contact with the top of the striker. Driven by the high-frequency voltage pulse, the high-frequency expansion and contraction drives the movement of the displacement amplifier, and the displacement amplifier drives the striker to move periodically in the flow channel and strike the nozzle, ejecting the colloid in the nozzle to form liquid droplets. The invention also discloses a colloid jetting method. The invention solves the problems of long colloid jetting operation, low efficiency, uneven colloid and unsuitability for refined operation in the prior art.

Description

technical field [0001] The invention relates to a colloid jet printing head and a colloid jet method. Background technique [0002] In the prior art, adhesives are used to bond different materials, different thicknesses, ultra-thin specifications and complex workpieces, or to repair the inner heat insulation layer of the engine. One way is to fix the workpiece to be glued or repaired, and drop the glue onto the working surface by manual dispensing. This method has low work efficiency, takes a long time to work, and the dispensing accuracy of different operators varies greatly, so it is not applicable For fine work, for example, wafer packaging of chips or repair of inner insulation layer of solid rocket motor; another way is to use contact needle dispensing device, by controlling the pneumatic or electric dispensing valve of contact needle dispensing device The opening and closing of the dispensing valve achieves the output and shutdown of the colloid, so that the colloid i...

AI Technical Summary

Problems solved by technology

One way is to fix the workpiece to be glued or repaired, and drop the glue onto the working surface by manual dispensing. This method has low work efficiency, takes a long time to work, and the dispensing accuracy of different operators is quite different, so it is not applicable. For fine work, such as wafer packaging of chips or repair of the inner insulation layer of solid rocket motor; another way is to use contact needle dispensing device, by controlling the pneumatic or electric dispensing valve of contact needle dispensing device The opening and closing of the dispensing valve achieves the output and shutdown of the colloid, so that the colloid is pressed out of the container and dripped onto the working surface through the needle. Due to the low action frequency of the pneumatic or electric dispensing valve, the operation takes a long time and the efficiency is low. When the colloid is shot out from the container, the colloid is not easy to cut off, and it is easy to cause the colloid to flow back, and the distance between the needle of the contact needle dispensing device and the working surface is very close, and the colloid may flow out in long strips due to adhesion, causing the colloid not to flow out. Uniform, also not suitable for fine work

Images