Programmable Multi-Blank Slitter: The multi-blank slitter included in the Ryerson Tull multi-blanking line allows the simultaneous production of up to five (5) finished blanks plus edge trim. A computer calculates the slitter set-up, and then automatically positions the slitter knives to produce the various blank widths required. Manual positioning of the slitter knives for each slit blank width is completely eliminated. The "Programmable Slitter" contains multiple slitter tooling "heads", with each head equipped with upper and lower slitter knives and strippers. The slitter heads are automatically positioned by a motorized precision ball screw assembly and digital encoder according to parameters established by the operator and the host computer. The operator simply enters the width of each blank into the controller keypad, and the heads are automatically unlocked, moved into position, and locked into place on a rigid base. Because the Programmable Slitter's slitter heads are synchronized with the constant leveler speed, not the cyclic start-stop feeder, the slit edges are consistent and shock load related equipment wear is eliminated.

Electronic Servo Feed: The "Precision Electronic Servo Feed" produces single sheets and multi-blanks to precise tolerances at high cyclic rates. The Servo Feed system utilizes high traction non-marking feed rolls to feed and meter the strips from the free loop into the shear. Low inertia feed rolls are accelerated, decelerated, and positioned by a precision electronic servo drive. Adjustable acceleration and deceleration rates allow for the processing of a wide variety of parts and sizes. Utilizing advanced computer-microprocessor motion control electronics, the Precision Servo Feed is user friendly, allows for quick keypad set-up, offers exceptional reliability, requires minimal maintenance, and is capable of metering feed lengths to precision tolerances.

Because the Precision Servo Feed moves in only one direction, forward, it is capable of extremely high cyclic rates under low acceleration conditions. Servo feeds compare favorably with mechanical positive stop "reciprocating feeds" that require violent acceleration-deceleration rates in order to compensate for time lost traveling backwards for another bite. Smooth controlled acceleration allows the strip to be fed, without slippage, with minimal feed roll pressure reducing the possibility of strip marking related to excessive gripping force. Violent acceleration induced shock loads that lead to excessive and costly maintenance and repairs are eliminated.

High Speed Shear: The Shear is a high cyclic rate mechanical "bow-tie" blade guillotine type powered by a variable speed DC motor driving a flywheel through a clutch-brake. When cutting short parts, the variable speed motor drives the crank shaft non-stop, producing a cycle rate up to 100 pieces/minute. In this mode, the clutch/brake is locked-up with the shear drive synchronized with the Electronic Servo Feed cycle. Longer lengths are produced in the intermittent clutch-brake mode at cyclic rates to 60 strokes/minute.

Solid Block Multi-Blank Packs

The versatile "Cassette Leveler" with its automatic roll positioning and job set-up memory, the "Programmable Slitter" with its full automatic slitter head positioning, the reliable high cyclic rate precision "Electronic Servo Feed", and the high speed "DC Shear", integrated with operator friendly controls combine to make the Ryerson Tull Multi-Blanking line the true "state-of-the-art" in high production precision multi-blanking line technology.

1107 East Main
Marshalltown, IA 50158