Leistritz introduces twin-screw extruder
Somerville, N.J.-based American Leistritz Extruder Corp.'s dual-purpose twin-screw extruder system is designed for wide-ranging color and dispersive mixing applications.
The system includes either a ZSE-18, ZSE-27 or ZSE-40-millimeter high-speed extruder with a special screw design and processing section for intensive mixing. A gear pump attached to the front end builds pressure to drive the melt stream through a fine filter, typically 300- to 400-mesh screens.
The Leistritz Macromatex TSCS personal-computer-based controller tracks pressure in front of the screen pack.
When not being used for pressure-rise testing, the twin-screw extruder can be paired up with a downstream pelletizer for developing concentrates. Pelletizing applications typically do not use the gear pump attachment unless very fine filtration is required.
Tel. (908) 685-2333, fax (908) 685-0247, e-mail [email protected]
Thermoset process completes trial run
Meridian Automotive Systems Inc.'s exterior composites unit completed a production trial at its heavy-truck plant in Salisbury, N.C., of thermoset process control technology from Signature Control Systems Inc.
Denver-based Signature Control said its in-mold dielectric sensors have dramatically improved the ability to control the sheet molding compound and in-mold coating. The technology could help SMC crack the market for painted plastic body panels, the company said.
Using the sensors in the mold on a Class A surface, Signature Control was able to obtain a cure curve for the SMC, trigger the injection of the in-mold coating at the optimal cure state of the SMC, monitor the cure of the coating, then trigger the press to open when the full part was cured. That reduced cure time by about 20 percent and guaranteed the SMC and in-mold coating were fully cured, creating an acceptable painted surface, the company said.
Signature recently signed a global agreement with Ashland Distribution that allows Ashland to sell its SmartTrac dielectric technology together with its Spiral Flow Mold system.
Tel. (614) 798-1285, fax (614) 798-0325, e-mail [email protected]
Krauss-Maffei touts PU/abrasive mix head
A hard-metal version of the polyurethane mixing head from Krauss-Maffei Kunststofftechnik GmbH handles spray molding of abrasive compounds, such as a PU/barium sulfate compound.
Spray molding of the filled PU is used to make sound-dampening backing layers for floor mats and carpets for cars and trucks. Filler concentration can be as high as 70 percent.
Until now, according to Krauss-Maffei, such highly filled formulations were injected into closed molds, but spray molding is less expensive.
Krauss-Maffei is based in Munich, Germany. It's U.S. headquarters is in Florence, Ky.
Tel. (859) 372-8549, fax (859) 283-0311.
Robotic Production unveils RoboTrim RT
Robotic Production Technology is pitching its RoboTrim RT-1000 router as a high-output machine for injection molders, blow molders, thermoformers and rotational molders.
``In many cases, this flexible and safe system provides 50 percent higher throughput than the traditional five-axis CNC trimming machines formerly used by some of RPT's newest customers,'' said Paul Schuch, RPT routing sales manager.
Software allows for quick changeovers between parts.
A RoboTrim RT-1000 is designed to use one or two Fanuc M-16iB robots and a servo-controlled rotating table. RPT developed application-specific software called RPT RouterWare that makes the system easy to use, according to the company.
Robotic Production Technology is based in Auburn Hills, Mich.
Tel. (248) 829-2800, fax (248) 829-2750.
Colormax releases gravimetric blender
Colormax Ltd.'s high-capacity gravimetric blender can accurately blend up to four materials at a high rate - up to 1,100 pounds an hour.
Each ingredient has its own screwless Posimax B300 feeder. Posimax units use vertical rotating discs, which create a product lockup zone, smoothly moving material from the storage hopper to the discharge outlet.
Synchronized feeding gives a constant blend, with no layering, so there is no need for an additional mixing device, said Colormax of Telford, England.
K-Tron International Inc. of Pitman, N.J., owns Colormax.
Tel. (856) 256-3045, e-mail [email protected]
SGBD blender series mixes 8 components
Sterling Inc. of Milwaukee said its SGBD series gravimetric weigh blender does precise blending of up to eight components.
SGBD units use the gain-in-weight principle. Each ingredient is metered into a batch hopper using a diamond slide-gate metering device. Precision load cells weigh the material to ensure an accurate blend. To provide a homogeneous blend, an integrated opti-mix bi-directional mix chamber is incorporated into the blender's base.
An easy-to-use controller holds as many as 50 recipes.
Sterling is part of ACS Group.
Tel. (414) 354-0970, fax (414) 354-9264.
D-M-E says inserts help reduce costs
Patented, interchangeable wear surfaces on IN2 interlocks from D-M-E Co. reduce maintenance costs for molders and mold makers, according to the company in Madison Heights, Mich.
The design features wear inserts made of graphitic steel that can be replaced easily during mold maintenance. Inserts are held in place with a precision, interference-fit design that retains them when the interlocks are installed on the mold.
Tel. (248) 398-6000, fax (248) 398-6174, e-mail [email protected]
AccuWeb offers PDG with splicing table
AccuWeb Inc. of Madison, Wis., has added a pneumatic splicing table as an option for its PDG-AG series of positive displacement guides for web converting.
Solenoid valves activate the mechanical clamping system, which uses a durable bladder that securely grips the web.
Tel. (608) 223-0625.
Harvard announces U-Slide, conveyor
Harvard Factory Automation Inc.'s U-Slide fits under an injection molding machine, replacing the old taped-up cardboard remedy to slide parts out from under the press.
Harvard Factory, of Harvard, Ill., customizes the U-Slide to accommodate the press. The slide has an aluminum frame and plastic slide area. U-Slide is available for presses of up to 400 tons.
Also new from the firm is the plastic-link belt conveyor.
Tel. (815) 943-1195, fax (815) 943-4030.