Patent GB-607276-A (GB)
Title: Unwinding and feeding metal strip from coils
IPC: B21C47/22
Filed: 1944-04-25
Abstract: 607,276. Uncoiling strip from reels. TRIGGS, W. W. (Bliss Co., E. W.). April 25, 1944, No. 7707. [Class 83 (iv)] Altering molecular structure ;metalsheet feeds.-Metal strip feeding means, e.g. for a stamping-machine employs two coil cradles designed to permit a coil to be received without shock. The strip is fed alternately from the coils on the two cradles, the coil on one cradle being renewed during feeding from the other. The strip passes round and between a series of flexing rolls to break up the grain and finally passes to the machine through feed and straightening rolls. The rolls are actuated through motors driven by pressure oil supplied by pumps and the valves are solenoid controlled in conjunction with a series of hand and limit switches. Strip from the upper coil 12, Fig. 1, passes under a holding roll 25 and past a limit switch 126, controlling the drive of the supporting rolls in the cradle, over guide rolls a to brushing rolls 20, 21 and a driven feed roll 23 that co-operates with either a roll 24 or a roll 22 in a swinging frame 27 according to whether strip is to be fed from the upper -or the lower coil. From the lower coil strip passes over rolls a past a limit switch 127 to the brushing rolls 19, 20. The strip being fed passes through further driven. feed rolls 31 to a large feed roll 35 that is driven only during the introduction of the strip into the machine. This roll co-operates with smaller rolls 37, 38 and with a guide shoe 40 pivoted at 41 and cam operated at 47 so that it may be released during the continuous running of the machine. The strip next passes between lower grain-breaking rolls c and upper rolls d, the latter being mounted in a vertically adjustable frame 42 and the former in a frame 164 pivoted about a shaft 51 and controlled by a link 165 and thrust block 167 operated by a fluid-pressure cylinder 147 having a solenoidoperated valve, so that the rolls may be separated to facilitate the introduction of the strip. A further driven large feed roll 50 co-operates with smaller rolls 52, 53 and with a fixed shoe 54. Beyond these, the strip is supported by guides 56 to facilitate its introduction to brushing rolls e, feed rolls f, straightening rolls g, feed-out-rolls h and guide rolls 61 from which it passes to the stamping &c. machine past limit switches M, N. The guides 56 are then lowered to the position shown in dotted lines. Manually-operated switches provide for inching the feed rollers during the insertion of the strip with a change over to automatic control during running in which the switch R reduces the feed rate, the switch Q increases it, and the switch P stops the feed in the event, for example, of irregularity in the strip. The manner of introducing a new coil and the details of the cradle for supporting the coil during unwinding are described in Specification 607,350. A limit switch located in the path of the strip's regular movement through the machine serves to restart the machine without the necessity of operating all the starting push-buttons as required for the initial starting of the machine.