Inner cooling system on drawing die drums

Inner cooling system on drawing die drums, particularly for the working of wires, comprising

• a rotating drawing die drum having an inner jacket wall,
• an inner insert extending substantially across the width of said drawing die drum and slightly spaced from said inner jacket wall of said drawing die drum defining a small rotational gap therebetween, said inner insert being stationarily mounted relative to said rotating drawing die drum,
• said inner insert including vertical axially extending ribs dividing said inner insert into a plurality of individual chambers lying angularly spaced one behind the other in a peripheral direction by said axially extending ribs,
• said inner insert including circumferential peripheral ribs extending in a peripheral direction on an upper and lower edge, respectively, closing said individual chambers at said upper and lower edges, respectively,
• all of said ribs having free ends being adjusted to said inner jacket wall of said drawing die drum spaced opposite therefrom defining said small rotational gap therebetween, said free ends of said axially extending ribs constituting scrapers extending along the axial length of said inner jacket wall and scraping the latter clean during rotation of said drawing die drum,
• feed conduit means for a continuous refreshing cooling medium flow-wise communicating with said individual chambers for supplying cooling medium thereto.