Apparatus and process for printing beer barrels

A process II for printing beer barrels, comprising the steps of:

• Step 1:
• installing a matrix element onto the Y-axis plane of a connecting frame and the circumferential surface of a turntable separately and arranging and labeling a plurality of corresponding single texts, wherein a matrix—of a female die structure is installed on the Y-axis plane of the connecting frame, and a matrix—of a male die structure is installed on a circumferential surface of the —turntable;
• Step 2:
• positioning an end of a stretched and welded barrel by a 3-jaw chuck and moving the barrel to a printing position, such that the inner side of the barrel is configured to be corresponsive to a matrix of a male die structure and the outer side of the barrel is configured to be corresponsive to a matrix—of a female die structure;
• Step 3:
• automatically finding the matrix of the corresponding female die structure and moving the matrix to a printing position by the connecting frame —when a first text is printed, and automatically finding the matrix of the corresponding male die structure and rotating the matrix along the Z-axis to a printing position by the turntable, and moving the matrix—of the female die structure along the X-axis by a hydraulic cylinder and operating together with the matrix—of the male die structure for printing, and restoring the matrix—of the female die structure to its original position after the printing is completed, and lifting the barrel by a lifting cylinder—to separate the barrel from the matrix—of the male die structure;
• Step 4:
• printing a next text, and controlling a 3-jaw chuck —independently to rotate the barrel to an appropriate angle first, and then performing the operation as described in Step 3;
• and
• Step 5:
• using the method as described in Step 4 to print the remaining text, so as to complete the labeled printing.