Plastics Technology

MAY 2012

Plastics Technology - Dedicated to improving Plastics Processing.

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said to perform comparably to European brands at a cost less than European and Japanese models. The SV line will span 75 to 2300 tons. Multiplas (multiplas.com.tw, represented here by New Pacific Machinery, Trenton, Tenn., newpacific@prodigy.net) is expanding in vertical, all-electric machines, adding a new 90-ton model to the existing 55-tonner in the V3E toggle line. Users can select horizon- tal or vertical injection and rotary-table options. The company is also rolling out the EMH050T, a 50-ton all-electric horizontal press with 570 mm daylight and up to 300 mm/sec injection. TWO-PLATEN PROGRESS Jon Wai will demonstrate a new area of competence at Taipei Plas—injection-compression molding combined with a rapid heat/cool (RHCM) mold. These capabilities will be demonstrat- ed in running a 32-in. ABS television cover on a new 850-ton two-platen model—the part usually needs a 1300-ton press. Conformal heating/cooling channels in the tool allow for rapid cooling of the part and a high-gloss surface. Jon Wai demonstrated tandem molding at last month's China- Plas show, producing 32-in. ABS television covers in a 1+1 tool on a 1200-ton JW-1200TP press. Although the 442-g front cover has a 35-sec cycle, and the 1371-g back cover requires 55 sec, overlap- ping the cycles with a tandem mold reduces overall cycle time to produce a front/back set in 65 sec. At Taipei Plas, Jon Wai hopes to trim the weight of the back cover to 900 g and expects to fur- ther shorten the overall cycle. Jon Wai says parts having up to a 30% difference in weight can be molded using a tandem or family mold approach, while reducing overall costs up to 40%. Jon Wai is rolling out two-color (TC) injection presses with wider platens. A new 250-ton, two-color 250 TCW press at Taipei Plas will feature a platen measuring 1205 x 760 mm (H x V), which is wider than the standard TC model. The new unit will produce 10-in. H-P tablet covers from ABS and TPU on a 1+1 mold. FCS added a new 850-tonner to its two-platen LM series, filling in a range spanning 650 to 3700 tons. The new model will be demonstrated with FCS's gas-assist system to produce a 5.5-lb child's car seat. FCS also has developed a 1420-ton press in its HB-R line for multi-component applications. A larger 2000-ton version is being developed. Lien Yu will unveil its new H-series of two-platen machines featuring servo-driven hydraulics. The series ranges from the 1100 to 2300 tons and features a new servomotor design. BLOWN FILM, BAGS & BOTTLES Queens Machinery (queens.com.tw), a producer of blown film lines and printing and bagmaking machines, will show several new offerings at Taipei Plas. Queens will unveil new multi-layer blown film capability in production of 40-50 micron, five-layer structures featuring nylon barrier layers. The coextruded structure replaces lamination, and the barrier film has a ready use for meats or sea- food. Queens says that seven-layer and nine-layer systems for hard- to-combine materials are in development. Queens will also unveil a shorter oscillating film tower for use in factories with restricted 24 MAY 2012 PLASTICS TECHNOLOGY Jon Wai will demonstrate rapid heat-cool molding on a new 850-ton two-platen hydraulic press. The 1200-ton model shown here was demonstrated at the China Plas show last month in tandem molding of two 32-in. TV covers. Tandem molding is a relatively new process in Asia. Queens Machinery is stepping up to five-layer blown film extrusion systems. It will show equipment for 40-50 mi- cron film with nylon barrier layer. Seven- and nine-layer film capability are in development. Continued on p. 62...

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