Sheet Extrusion
Boltless Flat Die Opens Faster
Without changing the inner workings of the die, Extrusion Dies Inc., Chippewa Falls, Wis., has come up with a revolutionary way to assemble flat dies without bolts. The closing mechanism replaces conventional die bolts with rods actuated by hydraulic toggles to hold the die halves together.
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Troubleshooting Melt Fracture in Profile, Tubing Extrusion
A troubleshooting timeline is essential to help you quickly identify problems and their causes. Here we'll describe such a timeline and how to use it to solve one common problem—melt fracture in tube and profile extrusion.
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Extrusion (K 2001 Preview)
Probably the most intriguing news in extrusion at K 2001 will be a novel way to extrude clear film that differs from standard blown and cast methods.
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Foamed PET Sheet Tackles New Markets
Perpetually in its infancy, PET foam sheet has been a hard sell for packaging producers over nearly a decade. It found successful niches in thermoformed ovenable bakery trays, meat trays, and reheatable dinner trays for home delivery to disabled persons.
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LCPs Break New Ground in Film Coextrusion and Thermoforming
Liquid-crystal polymer extrusion resins cost over $10/lb, but when used sparingly in 2-5 micron layers, they can be cost-effective in barrier packaging films.
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Can Your Sheet Lines Meet New ANSI Safety Standards?
The new standard relates to the design and use of the take-off equipment. Its biggest impact will be to require older sheet roll stacks to be extensively rebuilt or replaced in order to meet new emergency nip-opening requirements.
Read MoreCoextrusion Adds Shine to PP For Thermoforming Large Parts
New coextruded resin combinations are making polypropylene a contender for large thermoformed parts in outdoor uses from pleasure boats to automotive exterior trim.
Read MorePP Engineering Alloys Branch Out Into Molding, Extrusion, Thermoforming
The Hivalloy line of in-reactor grafted alloys of polypropylene and amorphous resins from Montell Polyolefins, Wilmington, Del., is expanding its market reach with new grades, new developmental alloy families, and dramatic new applications. Besides injection molding, developing applications now include thermoformed sheet and even barrier packaging films.
Read MoreTime for a Switch to Electric Heater Rolls?
Web processors and converters who use liquid-heated rollers for orienting, annealing, laminating, and embossing should take a look at recent advances in electric-heated rolls. You could get better temperature control with less maintenance and downtime.
Read MoreWood is Good for Compounding, Sheet & Profile
Extruding composites of wood and plastic has long been a "black art" practiced by a few specialists. But in the past year, this "hidden" market has burst into the sunlight as new producers and new applications sprout up all over.
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