Anhydrous dyeing system for yarn

An anhydrous dyeing system for yarn, the system including;

• a transfer printer which repeatedly sprays dye ink on a surface of a transfer sheet a plurality of times to laminate and apply ink layers;
• a dyeing jig which is in a drum form having a plurality of microholes formed in an outer circumferential surface thereof to penetrate inside and outside, wherein the yarn to be dyed and the transfer sheet on which the ink layers are applied are sequentially wound on the outer circumferential surface thereof;
• a process chamber into which the dyeing jig is put;
• a heating member for heating the yarn wound on the dyeing jig, by supplying heat to the inside of the process chamber;
• and
• a vacuum-generating member which is in communication with an internal space of the dyeing jig and vacuum-evacuates the air in the internal space of the dyeing jig to thereby form a vacuum pressure inside the dyeing jig,
• wherein the transfer printer includes:
• a printer body;
• a loading shaft rotatably installed at a rear of the printer body to wind the transfer sheet to be printed;
• a sheet guide guided while the transfer sheet, which is released from the loading shaft, passes;
• a nozzle head installed on an upper side of the sheet guide to be reciprocally movable in a lateral direction and spraying the dye ink in a predetermined pattern on a printed surface of the transfer sheet to apply the ink layers;
• an ink supply portion for supplying the dye ink to the nozzle head;
• a return drive portion which moves the transfer sheet backward by rotating the loading shaft in a reverse direction;
• and
• a position detection unit which detects a position of the transfer sheet when the transfer sheet moves backward and returns by the return drive portion,
• wherein the position detection unit includes:
• a mark generator installed in the printer body to generate an indexing mark on the printed surface of the transfer sheet immediately before starting a print job;
• and a mark sensor installed on one side of the mark generator to sense the indexing mark.