Plastics Technology

JUL 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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Page 53 of 67

At the recent Plast 2018 show in Milan, Italy, WM Thermoforming Machines of Switzerland demonstrated its new FC 780 E IM2 continuous thermoforming machine. This unit has vacuum and high-pressure forming with steel-rule cutting in the forming tool plus an additional in-line cutting press and in-line stacking. This unit is similar to the model exhibited recently at NPE2018 in Orlando, Fla., except that it is fully electric servo-powered—including the clamp frame (unlike the model at NPE). The additional servo axis is said to make the machine more flexible, as well as suitable for use in a clean room. For example, it allows height adjustment of the tooling of up to 370 mm on top and 250 mm on bottom—or vice versa—for a total adjust- ability of 620 mm. Electric servo drives recover energy from braking to feed back to the motor to power acceleration. This model takes a max. mold size of 780 × 580 mm and has a max. draw depth of 130 mm. WM eliminates the usual vacuum pump in favor of multiple venturi stages, thereby greatly reducing maintenance. Further maintenance savings are achieved by eliminating linear transducers in favor of absolute encoders, which are said to be more precise and reliable. This machine also uses new black ceramic heaters that are said to yield 10-12% energy savings with PET and 12-15% savings with PP. Remote service is available from Switzerland, whereby WM technicians can directly access the thermoformer control via the internet. WM machines are shipped on a single frame so that there is no reassembly needed at the customer's plant and machines are said to be ready to run the first day. Another recent development from WM is the Twist series, launched in 2016, which is a new version of the company's FT series of continuous formers with in-mold trimming and a tilting lower platen. The Twist version eliminates mechanical cams in favor of servo motors with dual encoders that read the programmed and actual positions and make realtime adjust- ments so that the two match. WM sources say the firm has been active in Mexico and its first U.S. machine installations have taken place in the last few months. +41 91 6407050 • THERMOFORMING MATERIALS New Packaging Formers Two reportedly unique compounds have been developed by Nova Polymers Inc., Evans- ville, Ind. NC8020TC is a new PC/ABS with improved chemical resistance. The company is testing the material, which is positioned to bridge the gap between PC/PBT and standard PC/ABS. It is available in custom colors. Nova TPEE polyester elastomer is a new TPE compound that is a blend of copolyester resins with an acrylic modifier and a proprietary mix of additives, which is said to allow the company to use lower- cost feedstocks, offering a 15-20% cost savings over comparable materials. This TPE compound boasts UV resistance and flame retardance for applications such as automotive air dams, front-end fascias, and other parts that require maximum ductility coupled with excellent mechanical properties. In many cases, the properties can be adjusted to meet specific customer requirements. 800-226-5143 • PC/ABS & Polyester TPE Compounds Leap Cost & Performance Barriers Reduce scrap and improve quality with Per-Fix ® specialty flaw repair coatings. Salvage costly parts with surface imperfections with our permanent flaw repair touch-up coatings. In 60-seconds, Per-Fix instantly repairs the most common visual part defects including knit/flow lines, gloss imperfections, splay and many others. 800-336-9828 • SPRAY-ON PERFECTION Per-Fix ® Clear Transparent coating to fix light to medium flaws. Free evaluation kit. Per-Fix ® Black For deeper flaw repairs. Free evaluation kit. Per-Fix ® Color Match Custom formulated based on full-color analysis of existing products. Free sample match. 52 JULY 2018 Plastics Technology Keeping Up W it h Technolog y

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