Micro dispensing device and method suitable for narrow slits

Abstract

The invention provides a micro dispensing device suitable for narrow slits. The micro dispensing device and method suitable for narrow slits comprises a drive mechanism, a liquid transfer needle regulating mechanism and a micro pipe regulating mechanism. The drive mechanism comprises a supporting frame, a rotary motor, a coupling, an eccentric gear mechanism and a liquid transfer needle mounting plate, wherein the rotary motor, the coupling, the eccentric gear mechanism and the liquid transfer needle mounting plate are installed on the supporting frame; and the liquid transfer needle mounting plate is connected with the eccentric gear mechanism. The output end of the rotary motor is connected with the eccentric gear mechanism through the coupling in a driving mode. The liquid transfer needle regulating mechanism comprises a liquid transfer needle clamp and a liquid transfer needle, and the liquid transfer needle clamp and the liquid transfer needle are mounted on the liquid transfer needle mounting plate. The micro pipe regulating mechanism comprises a micro pipe support and a micro pipe fixed to the micro pipe support. The micro pipe support comprises a micro regulating module and a posture regulating component. The invention further discloses a micro dispensing method suitable for narrow slits. The micro dispensing device and method are suitable for micro dispensing of narrow slits of various viscosities, the dispensing process is simple and easy to implement, and the micro dispensing device and method further have the advantages of adjustable frequency (with maximum frequency being 130 Hz), the super micro volume (the fL level), narrow slit dispensing and the like.

Description

technical field [0001] The patent of the present invention relates to the technical field of glue dispensing, in particular to a micro-dispensing device and method suitable for narrow slits. Background technique [0002] Dispensing technology is widely used in various fields and industries such as micro-assembly, bioengineering, and rapid manufacturing. With the rapid development of micro-electromechanical systems (MEMS), the requirements for micro-dispensing are getting higher and higher. Dispensing technology pursues the development in the direction of smaller amount, faster, higher precision and stronger reliability. [0003] At present, the common dispensing methods are: piston type, screw pump type, jet type and time / pressure type. Piston dispensing is less affected by factors such as viscosity, temperature, air pressure, etc., and has good uniformity, but the volume is within 2μL-2mL, and due to the structure of the dispensing device, it is difficult to achieve micro-...

AI Technical Summary

Problems solved by technology

Piston-type dispensing is less affected by factors such as viscosity, temperature, and air pressure, and has better uniformity, but the volume is within 2μL-2mL, and limited by the structure of the dispensing device, it is difficult to achieve micro-dispensing within a narrow gap

Screw pump dispensing is suitable for a wide range of glue viscosity, but it is greatly affected by screw parameters, and the distribution accuracy is low

Jet dispensing has the advantages of good uniformity of glue droplets and fast dispensing speed, but it is greatly affected by the viscosity of the glue, so it is difficult to apply to high-viscosity glue, and high-speed dispensing with low-viscosity glue is easy to produce satellite drops Phenomena such as affecting the quality of glue drops

Due to the structural limitation of the dispensing device, although the needle of the time pressure type can be made very thin, it can only realize the narrow gap dispensing of glue with a viscosity less than 500cp, and due to the principle reason, the uniformity of dispensing cannot be guaranteed.

At present, for high-viscosity glue, it is impossible to achieve micro-dispensing in narrow gaps at home and abroad.

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