Plastics Technology

AUG 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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feeders can also be used instead of an inlet hopper. Further side feeders can be provided along the processing zone, while liquid addi- tives can be injected at any desired position through kneading teeth with a bore. The newly developed discharge unit is based on the principle of a slowly rotating conical twin screw. Regardless of compounder configuration, the discharge unit builds up pressure for downstream units such as screen changers and pellet- izers and ensures constant throughput even at high backpressures. The housing of the discharge unit can be removed completely for ease of maintenance and cleaning. The machine is available in 55, 88, 110, 137 and 176 mm. THERMOFORMING NEWS The new-generation Quad Series thermo- former from Brown Machine Group (brown- machinegroup.com) is now available with a dual servo-drive system that maintains the 180 tons of coining force provided by the original design—at speeds above 40 cycles/ min (up from 28/min before). Each platen is driven by two Yaskawa servo motors and has four mechanical toggle assemblies that are corner-guided by four linear bearings. The toggles are strategically positioned on a honeycomb platen designed to eliminate deflection and guarantee consistent mate- rial distribution across the complete mold area. Symmetrical drive loads throughout the toggle linkages and drive system are said to eliminate all over-hung loads. The dual servo-drive system can be retrofitted at a much lower cost than a new machine. Brown also introduced the HTP-1T case-packing system, designed to erect cartons and pack products sequentially within the same machine to save floor space. The initial offering is targeted for the cup and lid industry, but the company has development plans for other markets. BLOW MOLDING NEWS As noted in our April show preview, PET stretch-blow machines were the most numerous category of blow molders at NPE2018. We have already reported on new systems from W. Amsler, Flexblow/Terekas, KHS, Nissei ASB, 1Blow, PET All Manufacturing and SIDE. Here's what else was new: Aoki Laboratory America (aokitech.co.jp) was operating four one-step injection stretch- blow molding (ISBM) models in its new AL series, which offers cycle times about half those of previous versions. The company focused on speeding up the preform injection molding stage, which required an injection screw about 5D longer and wider in diameter. Increased mold cooling allows for quicker release of the preforms for an overall faster cycle. The new AL-1000-150 was molding a 32-oz smooth, round PET mayo jar in six cavities. Compared with the previous SB III-500-150 machine with the same cavitation molding a jar www.sepro-america.com Tel: 412 459 0450 info@sepro-america.com A Full Range of Robots One Unique Control Sepro offers the industry's widest choice of 3, 5 and 6 axis robots for machines from 20 to 5000 tons, plus advanced connectivity and new control developments to improve your molding efficiency. With Sepro, the Future is Open 4.0 3-Axis 6-Axis 5-Axis @plastechmag 41 Plastics Technology Primar y Processing

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