Marking device for printing logo patterns on a surface of a plastic tubing and method for marking the plastic tubing

A marking device for printing logo patterns on a surface of a plastic tubing, with the marking device configured to be disposed on an output side of a plastic extrusion machine, wherein the plastic tubing is outputted to the output side and moves rectilinearly, with the marking device comprising:

• a transfer printing unit configured to be disposed on the output side of the plastic extrusion machine, wherein the transfer printing unit includes a transfer printing tape and a pressing rod, wherein the transfer printing tape includes a surface having a plurality of logo patterns, wherein the pressing rod is configured to be disposed above the plastic tubing, wherein the pressing rod is configured to press the transfer printing tape against the surface of the plastic tubing, and the plurality of logo patterns is transferred to the plastic tubing through transfer printing by heat of the plastic tubing generated during formation of the plastic tubing;
• a peeling unit disposed on a side of the transfer printing unit remote from the plastic extrusion machine, wherein the peeling unit includes a peeling end configured to separate the transfer printing tape from the plastic tubing;
• and
• a cooling unit disposed on a side of the peeling unit remote from the plastic extrusion machine, wherein the cooling unit includes a guiding tube for cooling the plastic tubing.