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At NPE: 3D Printed Molds

By: Matthew H. Naitove 25. March 2015

At booth W2703, Milacron is showing several developments in tooling. One is a demonstration of how short-run injection mold core/cavity inserts can be built in-house on short notice using 3D printing. Milacron demonstrates this with a PolyJet sysem from Stratasys that inkjet prints droplets of thermosetting liquid photopolymer that solidify when exposed to UV light. Inserts were thus “grown” in 5 hr and loaded into a quick-change MUD mold base from DME, Madison Heights, Mich. (photo). The inserts last for about 500 shots.

AT NPE: Faster, More Compact Electric Press

By: Matthew H. Naitove 25. March 2015

The new Toyo Si-6 series of all-electric machines is one of three new developments being shown by Maruka USA, Pine Brook, N.J., at booth W303. Compared with Toyo’s Si-5 series, the new Si-6 series (pictured) is more compact, runs 33% faster, and has a redesigned clamp for easier maintenance. Larger models (the range is 55 to 1050 tons) also have redesigned injection units. The new System 600 controller runs 10X faster than the previous unit and offers added features. At the show, an Si-300-6 molded 32 plastic spoons in 4 sec, a full 2 sec faster than the previous model.

 

Maruka also showed Toyo’s compact, all-electric ET vertical machine, which now features enhanced controls for easier operation, faster response, and greater molding accuracy.

 

Two machines from Fu Chun Shin (FCS) of Taiwan were also on display. One was the new 160-ton FB-160 RSV hydraulic, two-material press. The other was the LA-SV series of two-platen hydraulic presses, brand-new to the U.S. and available in 550 to 4000 tons.

At NPE: Rotary Stretch-Blow Machine from China

By: Matthew H. Naitove 25. March 2015

Among the large contingent of Chinese machinery suppliers at the show this week, Tech-Long USA, Commerce, Calif., is showing off a new generation of rotary stretch-blow molders in booth S32001. The G5 model on display offers outputs up to 2400 bottles/hr per cavity with six to 32 cavities. It reportedly reduces energy use by 10-15% compared with previous machines and enhances compressed-air recovery by 40-55%. Improvements in speed result from use of servo motors instead of pneumatic stretch rods; an integrated gripper system for faster bottle discharge from the molds; and a new PLC with 15-in. touchscreen. Improved seals are said to reduce air-exhaust noise from 92 to 83 db. Keth Boss, CEO of Tech-Long Americas, says this is the fifth-generation machine from Guangzhou Tech-Long Packaging Machinery Co.

ADG Solutions showcases new self-cleaning screen changers

By: Heather Caliendo 25. March 2015

Sandy Guthrie, founder and president of ADG Solutions, notices a big change from three years ago at NPE2012.

 

“There is much more awareness of reclaim,” he told Plastics Technology at NPE2015 (W-6754). “Compared to three years ago—even a year ago—it’s a much stronger year.”

 

At NPE2015, the company is featuring its Fimic APR 500, which is a continuous, self-cleaning screen changer that has new control programming as well as a 6” Davis-Standard ram stuffer. Also featured at the booth are separation and washing systems from Tecnofer, shredders from Weima America and densification systems from Promeco SpA. ADGS also announced the first installation of a Promeco system in North America.

 

“We are presenting NPE visitors with new and innovative approaches to reclaiming plastics scrap,” Guthrie said. “It doesn’t matter if it is post-industrial, post-commercial or post-consumer, plastic waste is valuable and it becomes more valuable when you process it correctly.”

 

The Fimic model APR 500 continuous, self-cleaning screen changers, with new control programming, are ideal for contaminated reclaim extrusion streams. In operation, the melt-filtration unit is positioned at the extruder outlet so that it retains contaminates as small as 150 microns. As contamination builds up on the upstream side of the screen, inlet pressure increases to set point (set on the pressure control), triggering a scraper that removes contamination from the face of the screen filter.

 

The new Fimic units store the contaminants from up to six scrapings and discharge all the accumulated contamination at once. This system can cut the amount of resin wasted in the cleaning process by half or even two-thirds.

 

In addition, the new laser-cut screen plates that ensures extremely long life. With a large open area, back pressure is minimized, even at such fine filtration levels. A continuous-scraping mode is available to prevent pressure instability by immediately removing contaminants that can quickly blind the screen.

 

Ram stuffers, similar to the Davis-Standard unit display in the ADG booth, can be added to an extruder to handle a wide variety of plastic feedstock sizes and types. The super-size feed throat maximizes in-feed for consistently high extruder output even when processing low-bulk-density scrap material including fractional-gauge films.

Specialty Olefinic TPE For High-End Cast Power Pre-Stretch Films

By: Lilli Manolis Sherman 25. March 2015

The newest grade in the Vistamaxx metallocene-catalyzed specialty olefinic TPEs from ExxonMobil Chemical is designed for high-performance cast power pre-stretch (PPS) films and makes its debut here at NPE.

 

            When used in the functional layer of cast PPS films, Vistamaxx 6000 is said to provide outstanding ultimate stretch, excellent holding force and tear propagation resistance even at thin gauge. This reportedly contributes to the secure transportation of goods, while helping to reduce waste and cost from damaged products.

 

            “Although the functional layer of stretch film comprises only about 10-15 percent of the total film composition, the intrinsic properties of the material used in that layer are key to performance. Vistamaxx 6000 has been designed to improve stretch film performance in response to market trends,” says global development manager Bill Ramsey. One such trend is the emergence of more mechanized and automated logistics chains, and the growing use of pallets to transport goods. Cost-efficient logistics operation can be made possible by combining the advantage of high-performance films and high-speed wrapping equipment,

 

            End-users are also moving to higher stretch or thinner gauge high-performance films, which can ultimately result in less film weight for the same pallet stability. “In the functional layer of cast PPS films, Vistamaxx combines high stretch with high holding force, exceptional toughness and easy processability for high output. It creates a very versatile film that adds value for both the extrusion and wrapping operation,” says Ramsey.

 

            European stretch film producer Ergis S.A., with a market presence in the PPS segment, has been running Vistamaxx 6000 in the functional layer of a high-performance PPS film. “We are impressed by the film’s excellent processability. Vistamaxx 6000 demonstrates flow right to the edges of the die resulting in excellent web stability and film roll appearance. Also, the film’s properties—ultimate stretch, stretch force and puncture—measured at 300% pre-stretch, were outstanding. The excellent tear propagation resistance provided by Vistamaxx 6000 clearly enables smooth, high-speed wrapping operations,” says Ergis’ managing director Grzegorz Kedzierski.

 

Want to find or compare materials data for different resins, grades, or suppliers? Check out Plastic Technology’s Plaspec Global materials database.

 

 




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