Device for quickly mixing, automatically delivering and filling slurry

Abstract

The invention discloses a device for quickly mixing, automatically delivering and filling slurry, wherein the bottom of a slurry stirring container of a slurry stirring device is positioned in an accommodating groove of the upper end surface of a delivery and temperature control platform, a stirrer is positioned in the slurry stirring container, and a stirring shaft of the stirrer is installed on an output shaft of a liftable motor; 2-5 layers of stirring wings are rotatably and fixedly installed on the stirring shaft of the stirrer, each layer of stirring wing comprises 2-5 wing type blades, the wing type blades of the adjacent layers are installed on an inner shaft of the stirring shaft in a staggering way, when the device works, the wing type blades of the lowermost layer are upswept, and the wing type blades of the other layers are downwarped; and an outlet of a slurry delivery pipeline of the delivery and temperature control platform is connected with a slurry automatic delivery and filling device through the slurry pipeline. The device is used to stir and delivery the slurry, the slurry can be more uniformly stirred, no dead angle is generated, the accuracy degree of a slurry filling position is high, the filling amount is more uniform, and the device is convenient for specific industrial use.

Description

technical field [0001] The invention belongs to the field of high-viscosity slurry production and use, and relates to a slurry automatic mixing, conveying and adding device. Background technique [0002] Solar silicon-based battery is a photoelectric conversion device in photovoltaic applications. Screen printing is a necessary process step in the preparation process of solar silicon-based batteries. It not only determines the structure of the emission area, but also determines the series connection of batteries and the The area covered by metal on the surface directly affects the technical performance indicators of the cell. Screen printing is to print silver paste or aluminum paste or silver-aluminum paste on the front and back of solar cells through a solar cell screen printing machine and a screen template, and the thickness, width and thickness of the printed film are consistent , affect the printing quality, and affect the technical performance indicators of the cell....

AI Technical Summary

Problems solved by technology

However, since there is only one wide paddle under the stirring device used in the existing screen printing process, the stirring resistance is large, and the stirring time is long in the actual production process, which is likely to cause problems such as uneven stirring of the slurry and flow dead zone, resulting in The viscosity of the slurry is not uniform, which affects the screen printing quality of the cell

When the viscosity of the slurry is small, the printed graphics are easy to expand, and bubbles and burrs are easy to occur; when the viscosity of the slurry is high, the printed graphics will have poor ink permeability, orange peel, small holes and other quality problems, and the thickness of the printed film cannot be guaranteed. , width and film thickness consistency

And the mixing slurry container is generally a polyester material barrel, which is cylindrical in shape with the same thickness at the top and bottom. The viscous force between the slurry and the container wall is relatively strong, so the stirring is likely to be insufficient, and the bottom of the barrel is formed. Dead zone, affecting printing quality

During the stirring process, there is no viscometer to control the temperature, the viscosity control is inaccurate, and the printing quality is affected

[0004] The paste used in the existing screen printing process is a conductive paste, and the carrier of its metal or metal mixture is an organic solvent. The organic solvent is easy to volatilize during the mixing process, resulting in a change in the viscosity of the paste; and due to the existing The slurry mixing and conveying device is an open discharge gas, which is easy to pollute the working environment

[0005] In the screen printing process, the printing machine needs to continuously add slurry, but currently the slurry is manually transported from the slurry mixing container to the screen printing machine, and the slurry is added manually when the machine is stopped or during the operation of the machine. The problem with the slurry is that the adding position of the slurry is inaccurate and the adding amount is not uniform, frequent shutdown will affect the printing stability of the cell sheet; manual handling of the slurry and manual addition of the slurry will result in a waste of the slurry, reduce production efficiency, and cause low efficiency product increase

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