Yushin America Inc. of Cranston, R.I., recently introduced three new robots. The Airliner AN, a pneumatic parts-removal robot with a servo-driven traverse axis, is designed for use with injection molding machines with clamping forces of 25-250 tons. The AN Series replaces Yushin's YK Series. The robot now has sealed linear guide bearings, which Yushin said reduce friction and maintenance, and speed up cycle times.
The robot can have three or five axes of motion.
The AN-II features a telescoping main arm, which the firm claims can take parts out 25 percent quicker than single-action arms.
Yushin also introduced the Netliner VN Series, 4-axis robots.
Tel. (401) 463-1800; fax (401) 463-1810.
Cincinnati Milacron Inc. has issued results from repeatability tests that show all-electric injection molding machines are more precise than hydraulic machines.
Until now, most of the discussion of electric machines has centered on energy savings and environmental friendliness, according to Ron Speed, product manager of Milacron's all-electric press, the Elektra.
``However, for most shops, these benefits will be secondary to the superior set-point repeatability demonstrated by these tests,'' he said.
The company's Batavia, Ohio-based Plastics Machinery Group said the tests, covering four parameters, showed the following data:
In shot size, the Elektra repeatability was 0.001 inch. Hydraulic repeatability was 0.003 inch.
In ejector forward, the Elektra scored 0.002 inch over 0.004 inch for the hydraulic.
For clamp-open position, the repeatability of the Elektra was 0.002 inch. Repeatability for the hydraulic was 0.003 inch.
The Elektra also won on cycle time repeatability, with 0.06-0.10 seconds for hydraulics.
Tel. (513) 553-6229; fax (513) 553-6560.
For thermoset molders, Hull/ Finmac Inc. of Warminster, Pa., has introduced a new generation of fully automatic compression molding presses with clamping forces of 75-300 tons.
Adjustable metering tubes deliver the amount of shot for each mold cavity. Rows of cups move into position under the tubes to receive the material. When all cups are charged, the loading board moves in over the mold, a bottom plate moves back and the charges drop into mold cavities.
During curing of one cycle, the machine fills a new load of cups.
Hull/Finmac also introduced a new deflashing system for thermoset parts.
The company said the Low Pro has two types of belts. Mesh belt models allow for parts to be air-blasted from all angles, above and below parts.
Machines with a double belt grip parts securely between belts without damaging them.
Tel. (215) 441-8163; fax (215) 441-8168.
Since thermoset molding is ignored at many smaller trade shows, Fahr Bucher GmbH has turned to workshop-type fairs.
More than 300 customers attended the first one, held Sept. 19-20 at Fahr Bucher's headquarters in Gottmadingen, Germany.
They saw thermoset machines operating and heard technical presentations from executives of Fahr Bucher, resin suppliers and members of academia. A TS 265P injection molder was displayed, equipped with a Poly 100 polyester stuffing unit and a Hunziker flat band deflasher. The system molded automotive headlight reflectors on a two-cavity mold.
In the United States, Fahr Bucher is represented by Bucher Inc. of Buffalo Grove, Ill.
Tel. (708) 215-4800; fax (708) 215-4845.
Rapid prototyping equipment maker DTM Corp. of Austin, Texas, has started beta testing a way to make short-run molds using its Sinterstation machines.
The technique, called Rapid-Tool/SR, uses DTM's patented Selective Laser Sintering process and a simple epoxy infiltration step to create molds that can make as many as 200 plastic parts. Users can go from a computer-aided-design model to molded parts in a few days.
DTM said the SR process can make complex molds with thin walls, ribs and fine detail. DTM hopes to begin offering the technology to users of its Sinterstation 2000/2500 rapid prototyping systems in early 1997.
Tel. (512) 339-2922; fax (512) 339-0634.