Plastics Technology

DEC 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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Upgraded Wheel Machine with Servo-Driven Clamps A new version of the Series III rotary blow molder from Wilmington Machinery has servo-driven clamps that provide extreme consistency of clamp opening/closing from station to station, resulting in high bottle uniformity. Like the Series III, the new Series IIIB comes with nine to 36 stations (clamps) in four sizes from 2.5 to 10 tons. It rotates at up to 10 rpm for production of 45 to 720 bottles/min. One or more extruders and a variety of die heads—single- or dual- parison—can be supplied for bottles of one to seven layers. Besides the servo-driven clamps, new features include more robust, modular clamp stations with air and water services pre-plumbed directly to the clamp platens, which are said to significantly reduce maintenance and setup times. Dual-cam clamp action reportedly reduces wear and allows for independent open/close control of each mold half. This feature is especially useful in ejecting and placing bottles at the discharge point. The new wheel retains the "radial positioning" or variable-pitch feature of the earlier Series III. A change is the unique "spoke" mounting arrange- ment of the clamps to the axle, creating a simpler, more robust arrangement that is much faster to set up. It also retains dual water unions to the molds for improved coolant flow and reduced cycle times. Woojin Plaimm of South Korea showed off its new HD-A5 series of fully hydraulic presses with energy-efficient servo pump at October's Fakuma 2018 show in Germany. Offered in sizes of 100 to 400 metric tons (U.S. office in Mount Prospect, Ill.), they are aimed at precision molding for automotive, electronics, etc. These units boast a central clamp cylinder, linear guides, swiveling injector, and new IMC 500 controller from B&R of Austria. The latter has an 18.5-in., full-HD, multi- touch screen and web connectivity that enables access via smartphone, tablet, or PC. OPC-UA communications protocol for Industry 4.0 can be implemented on this controller. INJECTION MOLDING BLOW MOLDING INJECTION MOLDING INJECTION MOLDING High-Speed All-Electric Press Line At October's Fakuma 2018 show in Germany, Sumitomo (SHI) Demag introduced the all-electric, high-speed IntElect S series from 50 to 180 metric tons, with injection speeds between 350 and 500 mm/sec. They are built especially for cycle times in the 3- to 10-sec range, vs. >10-sec cycles for standard IntElect machines, which have injection speeds of 50 to 200 mm/sec. To accompany the new high-speed line, Sumitomo Demag launched the SDR Speed robot series, built by Sepro. Starting last year, the company renewed the standard IntElect line with a second- generation series and a new platen concept. This started at the small end with machines from 50 to 180 m.t. Mid-size models up to 500 m.t. will follow next year. Larger IntElect S models are also planned. Upgraded Servohydraulic Line & Two-Shot Electrics Debut at Fakuma Two new versions of existing press lines are available from Absolute Haitian. Both were exhibited by Haitian International at October's Fakuma 2018 show in Germany. First, the Mars II S is an upgraded version of what Haitian claims is "the world's best-selling injection molding machine." This servohydraulic toggle series ranges from 67 to 3709 U.S. tons; 200,000 of the Haitian Mars series have been installed worldwide. The new "II S" version (up to 1320 U.S. tons) boasts a redesigned clamp that reportedly provides even greater energy effi- ciency and faster movements. Other improvements include reduced overall footprint, increased open space at the clamp end for conveyors, and improved pivot design on the injection unit for easier screw and nozzle changes. Absolute Haitian has some models in stock for quick delivery. (The company gave a "sneak peek" at a new-genera- tion Mars III at NPE2018, but that series will not be available until late 2019 or early 2020.) Second, Fakuma saw the debut of the Zhafir Zeres Multi-Series, a multicompo- nent version of the all-electric Zeries line, which has integrated hydraulics for nozzle touch, ejector and core pulls. The second injection unit can be mounted verti- cally, parallel to the main injector, or in a right-angled "L" version. Zeres Multi is offered in 190 to 450 metric tons. Korean Servohydraulic Presses with European Controls 44 DECEMBER 2018 Plastics Technology Keeping Up W it h Technolog y

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