Patent ID: 8142184

Claim:
A cooling system for a tool of a plastic processing machine, where the tool is provided with at least one borehole supplied with a cooling medium through a first supply line and the at least one borehole opens up into a first discharge line, wherein the first supply line and the first discharge line are combined in a coaxial conduit that connects the at least one borehole with a channel distributor where the first supply line is arranged in an internal position and the first discharge line in a position surrounding the first supply line, the channel distributor being completely outside of and not integral with the tool, the coaxial conduit is connected to the at least one borehole through a first coaxial bushing, and the first supply line is coaxially passed through a bushing body of the first coaxial bushing and projects inside the at least one borehole, while the first coaxial bushing connects the first discharge line with the at least one borehole and seals off the at least one borehole to an outside of the tool, where the coaxial conduit is held fast in the first coaxial bushing through a fastening device set up on a side of the first coaxial bushing turned away from the tool, the channel distributor is provided with a first channel and a second channel, the first channel is connected to a compressor outlet of a compressor through a second supply line and the second channel is connected to a compressor inlet of the compressor through a second discharge line, the first supply line of the coaxial conduit is connected to a channel outlet of the first channel, and the first discharge line of the coaxial conduit is connected to a channel inlet of the second channel through at least one second coaxial bushing.