Plastics Technology

DEC 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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something of a similar nature. This solution not only saved us a lot of space, but also opti- mized our workflow and brought a high flexibility to the system for future production tasks." CELLS IN OPERATION Each robot has its own Sepro Visual control, and each is individually programmed to per- form its own functions within the cell. However, the Visual 3 control on the first and largest robot, the Sepro S5-35, also functions as the "master" robot control, coordinating cell safety and robot operations. The large Sepro S5-35 robot has a horizontal stroke of 4000 mm. In the KHG cells, this robot begins the production process, picking up four stamped and bent metal contacts (two right-hand and two left) from the shuttle table of the punching and bending unit. The robot then moves to the vertical injection molding machine. After removing four over- molded contacts from the previous cycle, it places each of the four metal contacts into the lower half of the mold that rests on the open turntable of the machine. The robot's end- of-arm tooling holds these contacts just long enough to lock them securely into position before the mold rotates into the machine for overmolding. Meanwhile, the same robot places the four finished parts onto a test station, where they are checked using a 500V short-circuit test. Then, the S5-35 "master" robot picks up the tested parts again, moving acceptable parts to a transfer station and removing failed parts from the process. Next the Sepro Success 7 takes tested parts from the transfer station, identifies them as left-hand or right- hand parts, and places them into the appropriate part tray. This robot has a horizontal stroke of 1500 mm. Finally, the Success 11 robot takes over. It is responsible for moving filled trays of left- and right-hand parts to unloading stations, where it stacks full part trays onto movable carts. Then it retrieves another part tray (left or right, depending on the full tray it dropped off) from stations that contain empty trays, and places it into position on the sliding table for filling. The only human involve- ment in the cell's operations is removal of full parts trays— approximately every 6 hr. SIMPLIFYING MULTI-MACHINE INTEGRATION Ordinarily, integrating and controlling the operation of three robots and diverse pieces of equipment for metalworking, injection molding, electrical testing, and tray loading/ stacking would require a separate PLC and extensive custom programming. However, cell designers were able to coordinate and integrate the all the key equipment in the cell by A Sepro Success 7 picks finished components from a transfer fixture and places them in trays for left- and right-hand parts. Make Perfect Parts and Save Money! • Preload cores for perfect parts. • Save $$$$ with a smaller cylinder. • Simplify mold operation and design. • Smaller mold base = low cost parts. • Fully Preloads at only 1,500 psi. • Stays locked without hydraulics. • 400˚ F systems available. • Rush 0-2 day shipping available. pfa-inc.com N118 W18251 Bunsen Drive Germantown, WI 53022 (262) 250-4410 • Fax (262) 250-4409 KOR-LOK ® , Hydra-Latch ™ and Hydra-Jaws ™ are trademarks of PFA, Inc. ©2018 PFA, Inc. All Rights Reserved. Mold OPEN Core Out Mold CLOSED Core OUT Mold CLOSED Core IN Core PRE-LOADED Against FULL Injection Pressure CAN'T DO IT! CAN'T DO IT! KOR-LOK ® TRADITIONAL SIDE-ACTION VS. SIDE-ACTION SYSTEMS SYSTEMS YES! YES! YES! YES! YES! YES! SIDE-ACTION SYSTEMS Designed & Made in USA HYDRA-JAWS ™ Every Mold, Every Machine, Every Time! Adjusts to Fit Every Mold Quick and Secure Consistent Clamping Force NEW Service Center PFA-MEXICO/CNI-MEXICO Queretaro +52 442-198-0194 24 DECEMBER 2018 Plastics Technology PTonline.com Close -Up On Technolog y

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