Reducing accumulation of fibre around drafting zone output roller covering - by treating the roller covering ensuring continuity in quality

摘要

Reducing the accumulation of fibre around the cots on a drafting zone, partic. at the output roller pair is achieved by treatment of the roller covering. Drafting units are arranged on a frame, each with a twisting device and creel for winding the reel. The drafting zone may consist of several pairs of rollers and aprons but it is the final pair (20,21) which is most significant for efficiency. The pressure for the top rollers is arranged by the spring in a cradle (18) which swivels open (22) when spinning is stopped at reel changeover, or for a broken end. A pneumatic device (27) has a valve control and connections (28) to automatically throw out the rod (30) attached to the cradle (18) at the time of stoppage. A service unit (19) then stops at the unit on the frame, and at this time a roller (24) which is held in a bath (25) of acetone is pressed against the synthetic roller covering on the pressure roller (21) to clear the accumulation of fibre, which may have wrapped around the roller. ADVANTAGE - The accumulation around the cot reduces the efficiency of the drafting zone. The regular treatment ensures continuity in quality.