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Articles from 2000 In September

Oilless Rotary Scroll Pumps Ideal For Clean-Room Applications

Oilless Rotary Scroll Pumps Ideal For Clean-Room Applications

Air Squared has developed a new line of high-vacuum rotary scroll pumps for use in a range of process control applications. The units are said to provide vacuum to 0.5 torr (less than 10 torr is considered high vacuum) and offer projected time between maintenance of 10,000 hr. The oilless mechanics make these pumps ideal for clean-room applications.

Two models are available. Model LSL-200B measures 10.2 x 6.9 x 6.5 in. and requires 350 watts shaft power. Model LSL-400 B measures 10.4 x 7.5 x 6.9 in. and requires 500 watts. Both use ac motors as standard, with speeds of 1750 rpm. Noise levels are rated as low as 49 dbA.

Both models can be used in compressor mode, producing 25 liters/min at 25 psig and 80 liters/min at 25 psig, respectively.

The core of the pump consists of two, identical meshed rolls (involute spirals), each attached on its 'out' side to a flat base. One scroll is fixed, the other connected to an electrically driven eccentric. Indexed 180 deg to each other so their spirals mesh, the scrolls fit together to form two halves of a chamber. The indexing creates crescent-shaped pockets between the involutes of the meshed scrolls and the base plates.

Air entering the pump through a port at the center of the fixed roll gets trapped in the pockets. As the moving scroll orbits the fixed one, the pockets follow the spiral inward, getting progressively smaller and compressing the air. Finally, the air is exhausted through an outlet at the center of the scrolls.

Compared to reciprocating units, scroll compressors are said to provide smooth, pulse-free operation without noisy valves and vibration. Rotary motion allows dynamic balancing, which reportedly provides nearly vibration-free operation. And with only one moving part, scroll designs are claimed to be more reliable and durable.

Air Squared, Inc.
Hamilton, OH 

Radius Turn Conveyor Customizes Parts-Handling Flow

Radius Turn Conveyor Customizes Parts-Handling Flow

Dynamic Conveyor's Radius Turn conveyor module incorporates injection-molded ribbed sides that flex to make a turn from 1 to 180 deg. One continuous belt flows on an incline or decline and turns right or left.

The module can be specified as part of a new system or added to an existing Dynacon system. It connects with other modules to form conveyor systems up to 30 ft long. Prices range from $800 to $1200, depending on width and angle.

The unit has four caster-base wheels, mounted on cross-barred extruded aluminum legs for portability. They lock for stability.

Two belt types are available. The standard 2.0 Radius Flush Grid belt is suitable for most applications. It is constructed of polypropylene and acetal with a 42% open area and is available with drive flights in 1-, 2- and 3-in. heights. Special heights of 1/2 to 3 in. are also available.

The optional 2.0 Flat Friction Radius Turn belting is constructed of polypropylene with a rubberized surface for cushioning of parts that could scuff during processing. It is coaxially constructed to conform to any turn angle up to 180 deg.

Dynamic Conveyor Corp.
Muskegon, MI 

Non-Contact Welding System Uses Short-Wave, Infrared Emitters

Non-Contact Welding System Uses Short-Wave, Infrared Emitters

There's word from The Welding Institute (TWI) in Cambridge, England, that engineers there have developed a short-wave infrared, non-contact welding system that they believe offers an energy efficient alternative to traditional hot-plate butt welding.

The TWI system, which to date has only been configured for pipes but could be applied to many other plastic products, consists of two banks of 1.5 kw short-wave infrared emitters clamped and spring-loaded on either side of a movable platen.

The platen is positioned between the parts to be welded to melt the joining surfaces, then retracted, and the two parts are brought together to complete the weld. Engineers at TWI say the weld cycle can be completed in around 5 sec, while the non-contact heating system eliminates the hotplate cleaning required by contact welding systems.

Less energy is required because the infrared emitters, which are a new high-power type developed by Heraeus Noblelight, only need to be powered for around one-tenth of the welding cycle. With traditional hotplate systems the plate is heated throughout the complete cycle.

TWI says the system can be used with most weldable plastics. The equipment is available at TWI's Cambridge facility for proving trials on particular materials and product geometries.

The Welding Institute
Cambridge, England 

Source: PLASTICS Daily News wire service, Business Intelligence Group, Columbia, NJ

Part/Sprue Pliers, Gripper Fingers Added To EOAT Line

Part/Sprue Pliers, Gripper Fingers Added To EOAT Line


 Part/sprue pliers The GRZ series ofpart/sprue pliers are designed for robotic EOAT (end-of-arm tooling) grippers. Three sizes are available: GRZ 1010 (fits >SAS

Three versions of each size are available: units with jaw mounting holes for custom applications, units with standard jaws and units with in-the-jaw part sensors. These jaws are said not to need adjustment, even with changing sprue sizes.

Most of the units have a single-acting spring function jaw return (meaning that only one air line is required for operation) and all are compatible with the company's modular Get A Grip! EOAT gripper system. Prices start at $165. 

Gripper fingers The GRF Series of gripper fingers are designed to securely 'claw' around a part by flipping behind part edges. They are specifically designed for difficult part removal applications, where high force and/or part flexing off mold lifters is necessary.

Fingers are pneumatically single-acting and have a spring return function. They are also extendable for longer reaches.

The fingers are available in standard sizes and are compatible with the company's Get A Grip! EOAT gripper system. Prices start at $310. 

>SASXenia, OH

Pad Printer Needs Only One Nesting Fixture;Print Heads Are Indexed

Pad Printer Needs Only One Nesting Fixture;Print Heads Are Indexed

The microPrint 5 STAR is a Swiss-built programmable servo-driven pad printing machine for decorating with up to five colors. Marketed in the U.S. by Deco Technology Group, this machine requires only one nesting fixture; the five print heads are indexed, as opposed to rotating multiple parts around a rotary indexing table. The machine is capable of printing up to 2100 parts/hr using one color.

The unit features programmable tape pad cleaning and a programmable touchscreen interface with a Siemens PLC. Operators can independently program pad-to-plate strokes, pad-to-part strokes, time delays in either ink pick-up or print stroke and multiple hits at every print station.

Because the 5 STAR is servo-driven, it can also be programmed to reciprocate between two adjacent print stations, allowing for higher speed 2-color printing with automatic pad tape cleaning. In order to do this, it requires an optional second tape pad cleaning station (shown on right side of machine in photo above).

Another option is the Viscomatic, an automatic ink viscosity control package that monitors and adjusts the ink's viscosity inside the closed cups, by sending viscosity information (torque) to the PLC. The Viscomatic is said to eliminate operator intervention and downtime by adding ink thinner any time the viscosity of the ink falls below a pre-set value.

The 5 STAR can run either 86- or 120-mm closed ink cups. No tools are needed for change-over. Unit also has an interlocked enclosure for safety. The machine measures 39-3/8 x 35-3/4 x 61-1/2 in. and weighs 705 lb.

Because the 5 STAR comes in many configurations, the company asks that you contact them directly for pricing information. Use the Key Contact Directory on p 40.

Deco Technology Group, Inc.
Orange, CA 

New Interactive Training Program Targets Materials

New Interactive Training Program Targets Materials

Paulson Training Programs' latest offering is "Understanding Materials For Profitable Molding." The program contains a library of individual lessons that provides an overview of the properties and characteristics of raw material types. Each lesson includes the resin's chemical and physical properties, the recommended processing windows, start-up and shut-down tips and tips for solving typical molding problems.

The first material to be covered in the series is polycarbonate, with polypropylene and polyethylene due out this Fall. Each lesson is approximately 1 hr and is priced at $995. In addition to the interactive CD, the package includes a leader's guide and five study guides.

The series will eventually include ABS, nylon, polyethylene terephthalate, general-purpose polystyrene, polymethylmethacrylate, acetal and acetal copolymers, PVC, polyurethane, polybutylene terephthalate and polyphenylene sulfide and others.

Paulson Training Programs, Inc.
Chester, CT 

Low-Profile Angled-Frame Conveyor Comes In A Range Of Configurations

Low-Profile Angled-Frame Conveyor Comes In A Range Of Configurations

Q.C. Industries' low-profile (1.89 in.), angled-frame conveyor, the 125 Z Series, has the same design featuresas its 125 Series conveyors, butoffers additional frame and angleconfigurations.

Six standard angles (15, 30, 45, 60, 75 and 90 deg) and five different frame configurations are offered. Frame configurations include the QCL (horizontal to incline), QCR (incline to horizontal), QCZ (horizontal to incline to horizontal), QCN (incline to horizontal to decline) and QCU (decline to horizontal to incline).

A variety of belt options are available. Cleated belts incorporate a high-strength, welded cleat for long belt life and load-carrying capacities up to 225 lb. Widths range from 6 to 24 in. and lengths to 25 ft. Cleat sizes range from 1/2 to 3 in., with angled cleats also available. Belt speeds are to 225 ft/min.

In addition, belt changes can be made in less than 5 min. All bearings are equipped with seals and incorporate grease fittings for ease of lubrication while conveyors are running.

Conveyors are available in standard and corrosion-resistant styles. A variety of sides, guides, stands, mounts and drive packages are available. These conveyors are said to be competitively priced and can be delivered in two to four weeks.

Q.C. Industries Inc.
Amelia, OH 

Deburring Kit Features Interchangeable Blades

Deburring Kit Features Interchangeable Blades

Abbeon Cal is offering a cold-cut deburring kit that includes six red, anodized aluminum handles:

  • Two large handles, 0.98 x 4.52 in., with quick-release steel blade holder for rotating deburring blades
  • Two small handles, 0.43 x 3.26 in., with quick-release steel blade holder for rotating deburring blades
  • One knurled handle with scraper, 0.39 x 3.11 in., with integrated hexagonal key for blade changes
  • One utility knife blade handle, 0.98 x 4.33 in., with stainless steel clamping sleeve

The kit also comes with five deburring blades, one scraper, 15 utility knife blades and a self-contained fiberglass-reinforced polyamide case with a polycarbonate cover. Replacement blades are available.

The kit, Model CCK, is priced at $225. Replacement blade prices range between $2/blade up to $8.75 for a package of 10, depending on the style.

Abbeon Cal, Inc.
Santa Barbara, CA 

Source: PLASTICS Daily News wire service, Business Intelligence Group, Columbia, NJ

Bulk Bag Unloader: Self-Contained/Inexpensive

Bulk Bag Unloader: Self-Contained/Inexpensive

PIAB Material Handling has introduced a pneumatic bulk bag unloader for use with its compressed air-powered vacuum conveyors. This simple and self-contained unit is said to be relatively inexpensive, compared to similar units.

PIAB does not publish prices, contact the company directly for this information using our Key Contact Directory on p 40.

With the bulk bag elevated above the station, the spout of the bag is attached (before it is untied) to an inflatable seal. This provides for a dust-tight connection and eliminates the need for glove-boxes, doors or enclosures.

All contact surfaces are constructed of 316 stainless steel. No tools are needed for disassembly and the unit is said to be easily portable.

PIAB Material Handling
Rockland, MA 

Portable Spray System Applies Mold Release Agents

Portable Spray System Applies Mold Release Agents

Burger Engineering's MoldTender is designed to apply either bulk or aerosol mold release agents to injection molds. Burger's Russ Longley says the MoldTender will allow a press to run unattended in a fully automatic mode.

Key components of the system are a bulk reservoir (3 gal or optional 5 gal) or aerosol canister (40 lb), PLC, pressure regulators, pneumatic or solenoid-operated valves and spray nozzles. The system is mounted on a hand truck that can be easily moved around.

The PLC can be set to control bulk or aerosol spray timing, duration and count. An F1 function key allows for manual control for the first cycle or for special requirements.

An optional stack light signalsnormal spray (green), mold release'lo-refill', service required (amber) or no spray and a possibly stuck molded part (red).

Longley adds that the MoldTender uses "substantially less mold release than application with hand-held aerosol cans" and that it pays for itself in 30 to 90 days. Price is not yet available. Contact Burger for specifics via our Key Contact Directory, p 40.

Burger Engineering, Inc.
Olathe, KS