The present disclosure provides a solder paste tube assembly device, a printing machine comprising same and a solder paste tube assembly method. The solder paste tube assembly device is used for securing and sealing a solder paste tube, in which a nozzle is arranged at the bottom of the solder paste tube, and the solder paste tube provides a solder paste by means of the nozzle, the solder paste tube assembly device comprises a support, a top sealing device and a bottom support device, the top sealing device is configured to controllably ascend and descend for connecting to the top of the solder paste tube at different heights in a sealing manner. The solder paste tube assembly device of the present disclosure can automatically complete the disassembly and replacement of the solder paste tubes and can automatically replace the solder paste tubes of different heights by means of the top sealing device capable of automatically ascending and descending.

The present invention discloses a silicon wafer printer for double half-cell printing, comprising a work platform, a turntable assembly, a front-end conveyor, a left calibration module, and a right calibration module. A calibration vision camera is mounted above the front-end conveyor's end. The left linear module connects to a left motor module and then a left suction module. The right linear module connects to a right motor module, two calibration cylinders, calibration bearings, and a right suction module. It uses visual positioning to determine double half-cells' position/angle, adjusts the right half-cell with the left as reference, shortens alignment time, adopts single-head front-to-back printing and a smaller indexing disc, boosting turntable printing efficiency.

A method (500) for printing on a substrate (102) for the production of a solar cell, the method comprising: printing (501) a wet pattern on the substrate (102); extracting (503) three-dimensional morphological data of the wet pattern (104) in real-time using an in-line profilometer (101); wherein the printing of the wet pattern on the substrate is controlled in real time at least in part based on previous three-dimensional morphological data obtained by extracting the three-dimensional morphological data.

A printing process assistance system includes a printing part that executes a printing process of printing a paste material onto a board, and a cleaning process of cleaning a lower surface of the mask a predetermined number of cleaning times at a predetermined cleaning interval; a control part that controls an operation in each of the printing process and the cleaning process; an inspection part that inspects a level of a smudge of the paste material on the board subjected to the printing process; and an information output part that outputs, when a result of the inspection shows continual smudge occurrence, assistive information to reduce the smudge to a destination which is at least one of the control part or a notification part configured to notify an operator of information. The information output part outputs information to increase a frequency of cleaning processes as the assistive information.