A water cleaning circulation system and production line for bad screen printing sheets

Abstract

The invention discloses a water-cleaning circulating system for substandard sheets produced in silk-screen printing. The water-cleaning circulating system comprises a soaking apparatus (2), a front surface flushing apparatus (3) and a back surface flushing apparatus (4); a first solution circulating apparatus (29) is arranged in a first liquid outlet (26); the outlet of the first solution circulating apparatus (29) is connected with a first liquid inlet (28); a second solution circulating apparatus (34) is arranged in a second liquid outlet (31); the outlet of the second solution circulating apparatus (34) is connected with a second liquid inlet (33); and filtering apparatuses for filtering solid precipitate are arranged in the first liquid outlet (26) and the second liquid outlet (31). Before the front surface and the back surface of the substandard sheets are cleaned, the substandard sheets are soaked for one time to remove a part of aluminum paste from the surfaces of the substandard sheets as well as to permeate a part of water to the aluminum paste; therefore, the aluminum paste is easy to fall off in the front surface flushing process and the back surface flushing process; the requirement on the water flow speed is lowered; and the separate recycling for aluminum and silver is realized.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a water cleaning circulation system for bad screen printing sheets and a production line thereof. Background technique [0002] The back electric field and back electrode of crystalline silicon solar energy are located on the back of the solar cell, forming the back and lower electrodes of the silicon cell. Cooperating with the upper electrode on the surface of the silicon cell, it plays the role of transmitting the electric energy generated by the silicon solar cell to the outside world. The positive electrode and the back electrode are made of silver paste, and the back electrode is made of aluminum paste through printing, drying, and sintering. [0003] In the normal production process of cell screen printing, there are often some defective screen printing products caused by abnormal printing. These defective products mainly include incomplete graphics on the front, incomplete graphic...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of low cleaning efficiency, poor effect, and unfavorable industrial production needs in the manual cleaning of defective screen printing sheets existing in the prior art, the present invention provides a water cleaning circulation system for defective screen printing sheets, including A soaking device, a front flushing device and a reverse flushing device, the bottom of the soaking device is provided with a first liquid outlet, the top is provided with a first gas outlet, the side is provided with a first liquid inlet, and the first liquid outlet is provided with There is a first solution circulation device, the outlet of the first solution circulation device is connected to the first liquid inlet, the front flushing device and the back flushing device are provided with a water storage tank, and the side of the storage tank is provided with a second Two liquid outlets, the top is provided with a second gas outlet, the side is provided with a second liquid inlet, the second liquid outlet is provided with a second solution circulation device, and the outlet of the second solution circulation device is connected to the first outlet. The two liquid inlets are connected, and the first liquid outlet and the second liquid outlet are provided with a filter device for filtering solid sediments. After that, it is melt-blown non-woven fabric, needle-punched non-woven fabric, melt-blown non-woven fabric

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