Latest Aoki machine reduces cycle times
Aoki Technical Laboratory Inc. said its new one-step injection stretch blow molding machine cuts cycle time by 30 percent from the earlier model.
More-efficient movement of injection mold halves is the key to the cycle-time reductions for the SB III-250LL-50S, Aoki said. In the earlier model, the SB III-250LL-50, the upper half of the mold closes first, and then the lower half moves up to close the mold, with the process reversing when the mold opens. In the new model, both mold halves move simultaneously, saving time.
The improved press also uses a tilting plate actuator to run at higher speeds. Another feature: a synchronized circuit using a rack-and-pinion mechanism to open and close molds during the blow molding cycle.
A wider blow mold clamping unit enables the 50S model to run a more-diverse range of bottles, according to Aoki of Nagano, Japan. Changes of blow molds are easier, thanks to a new hydraulic cylinder that slides the mold out of the machine.
Another new injection stretch blow molder from Aoki, the SB III350LL-40, was designed for fast-cycle molding of narrow-neck bottles. An electric servo motor runs the turntable movement, which Aoki claims is an industry first. In addition, simultaneous mold opening and closing replaces a conventional two-step method.
Aoki's U.S. headquarters is in Elk Grove Village, Ill.
Tel. (847) 981-6000, fax (847) 981-6105.
Mix heads handle the sticky situations
Gusmer-Admiral Inc. is involved in a sticky divorce.
The Akron, Ohio-based company is aiming a line of buffered, divorce-style polyurethane mix heads at refrigerators and other appliances — jobs that process abrasive materials or "sticky" PU foam.
Gusmer-Admiral said the mix heads process "enhanced" PU, with additives such as barium sulfate, and other special formulations so the foam deadens sound, absorbs energy and does not shrink.
Often, abrasive additives can wear out the mix heads. Gusmer-Admiral uses carbide inserts, instead of solid carbide components, in some high-wear areas. The head was lengthened to allow portions of the plunger that are exposed to PU material to remain apart or "divorced" from the hydraulic seals. The clean-out plunger was changed to eliminate sticking.
Also new from Gusmer-Admiral is a high-pressure reaction injection molding machine, called the OmegaRim. The machine is priced at the level of low-pressure equipment, the company said.
Tel. (330) 253-1353, fax (330) 253-7715, e-mail [email protected] miral.com.
Maxson provides dual-knife sheeter
Maxson Automatic Machinery Co. of Westerly, R.I., introduced a dual-knife rotary sheeter to cut sheet made from flexible vinyl, high density polyethylene and low density PE.
The SDFK sheeter cutting section uses two knives mounted in rotating cylinders, which accelerate and slow down during each revolution so that the speed of the blades matches the speed of the sheet at the cutting point. This design allows the cutting of sheet up to 0.06-inch thick without producing slivers or chipping the edge of the cut sheet.
Tel. (401) 596-0162, fax (401) 596-3870, e-mail [email protected] .net.
Uniloy one-step unit eases mold changes
Uniloy Milacron of Manchester, Mich., is touting fast mold changeovers and flexible production of a range of bottle sizes for its U750-60, a one-step stretch blow molding machine.
The machine injection molds PET preforms and blow molds the bottles.
Tooling is a major focus of the machine. Uniloy Milacron said a new design allows technicians to install molds quickly as stacked assemblies. Mold changes can take five to six hours, compared with 10-12 hours for conventional systems that require piece-by-piece installation and alignment of injection cores, neck split and injection blocks and cavities.
The machine also accepts existing preform tooling for the most widely used machines today, according to Uniloy Milacron.
Another feature, a dual shut-off design on the nozzle, eliminates drool when the mold is open.
The U750-60 can be configured for two-cavity molding of neck diameters as large as 75 millimeters, or up to 14 cavities with 28mm neck diameters. Uniloy Milacron plans to introduce a wide-mouth version, for bottles with necks up to 135mm in diameter, this year.
The blow molder has a Siemens S7-300 controller.
Tel. (734) 428-8371, fax (734) 428-1165.
Kice tubes, fittings provide flexibility
Kice Industries Inc. says its Dust Duct, a factory-built system of tubing and fittings, controls dust fumes in plastics processing and chemical production.
Dust Duct uses more than 25 different types of fittings in a range of sizes, including straight sections, flexible sections, dampers and air inlets. The company in Wichita, Kan., makes the ducts in several materials, such as mild steel, stainless steel, aluminum and abrasion-resistant steel.
Tel. (316) 744-7151, fax (316) 744-7355.
Nissei introduces 20-ton all-electric
Nissei Plastic Industrial Co. Ltd. said its new 20-ton all-electric press, the ES200H, runs at very high cycle speeds of 0.6 second.
The machine is designed to mold connectors and other tiny parts. The speed comes from design changes, such as a center-drive servo motor to run both injection and clamping at the same time. The drive is connected to a ball screw.
The tiny press also features a new screw and new temperature controller for the heating cylinder.
Nissei is based in Nagano, Japan. Its U.S. headquarters, Nissei America Inc., is based in Anaheim, Calif.
Tel. (714) 693-3000, fax (714) 693-7777.
NDC scanner provides balanced coat weight
In the United Kingdom, Rexam High Performance Flexibles is using an on-line scanning system from NDC Infrared Engineering to measure the consistency of coating weights.
Rexam has reduced scrap and boosted quality, according to NDC of Irwindale, Calif.
The Rexam unit in Thetford, England, makes flexible packaging materials for food and drinks, such as potato chips, concentrated orange juice and wine. Two infrared gauges work on different lamination lines, scanning continuously across the width of the web.
Before Rexam installed the NDC gauges, the coating weight had to be checked by manual sampling several times a day.
Tel. (626) 939-3810, fax (626) 939-3870, e-mail [email protected] frared.com.
SMS screw drive electrifies presses
SMS Plastics Technology is offering an optional electric screw drive on Battenfeld HM injection presses. Battenfeld also can retrofit electric drives for the plasticizing process.
Battenfeld has outfitted HM presses with a connector that accommodates both hydraulic motors and electric servo motors — simplifying the conversion to electric.
The company's U.S. unit, Battenfeld of America Inc. is based in West Warwick, R.I.
Tel. (401) 823-0700, fax (401) 823-5641.