Works Cited – Extruder Project

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Record: 1

ABC‘s of Extrusion spell success for processors. Modern Plastics, June 2002 supp, Vol. 79 Issue 6, ps4-s13, 10p Abstract: A special supplement on the contribution of pipe and profile equipment suppliers to finding a solution to extrusion needs at SMS Plastics Technology is presented. The main markets served by American Maplan, Battenfeld Extrusion Technology, and Cincinnati Extrusion are pipe and profile fabrication, sheet extrusion, and pelletizing. SMS is the corporate parent of these 3 companies, but each approaches business differently in how it designs and builds extrusion lines.; (AN 500884209)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 2

Advanced thermoplastics take to extrusion. By: Kreisher, Keith R.. Modern Plastics, February 1991, Vol. 68, p57-60, 4p; (AN 501837440)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 3

Advances in recycling & scrap reclaim. / NPE 2000, Chicago, IL, June 19-23, 2000; with list of exhibitors and products on display By: Schut, Jan H.. Plastics Technology, Oct2000, Vol. 46 Issue 7, p60-64, 5p Abstract: A review of the latest advances in plastics recycling and scrap reclaim that showcased at the NPE 2000 plastics exhibition on June 19–23 in Chicago, Illinois. Much of the recycling excitement at NPE 2000 was generated by composites of wood flour and fiberglass. Single-shaft rotary grinders also featured prominently at the show.; (AN 500630995)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 4

Benchmark Your Extruders For Quicker Processing Fixes. By: Frankland, Jim. Plastics Technology, October 2011, Vol. 57 Issue 10, p27-27, 1p Abstract: The article discusses the benefits of benchmarking the extruders for rapid resolution of problems during operations. The author explains that a benchmark analysis should include every aspect of the extruder such as the areas needed for frequent heating or cooling, the temperature of the feed throat, melt quality, and drive load. He adds that the benchmarking approach eliminates a lot of time in troubleshooting without a lot of physical work. Some causes of extruder breakdown are cited.; (AN 525579053)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 5

‘Dead’ Screw Talking. By: Frankland, Jim. Plastics Technology, July 2011, Vol. 57 Issue 7, p19-19, 1p Abstract: The article discusses the examination of worn or poor-performance screws that can often uncover information that is hard to determine when such were still in use. High wear areas on the screw can reportedly indicate a design or alignment issue and a trailing end burr on the flight shows that the screw has an unbalanced pressure toward one side of the barrel. It is stated that a burr on both sides of the flight is a mark of an unaligned or bent barrel and that a metal area with a blue tint is a sign of subjection to very high temperature.; (AN 502032759)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 6

Design of Calibrators for Extruded Profiles. Part 1: Modeling the Thermal Interchanges. By: Nóbrega, J. M.; Carneiro, O. S.; Covas, J. A.. Polymer Engineering & Science, Dec2004, Vol. 44 Issue 12, p2216-2228, 13p Abstract: The parameters influencing the calibration/cooling stage of profile extrusion are discussed, and a numerical finite-volume method code to model the heat transfer is described and validated. For this purpose, the numerical predictions are compared with the analytical solution of a simple problem, with results available in the literature and with those produced by a commercial software. The routines developed are then used to identify the main process parameters and boundary conditions and to estimate their relative importance. The investigation clearly shows the advantages of using several calibrators separated by annealing zones, relative to a single calibrator of the same total length, and the large impact of the contact resistance between extrudate and cooling unit while showing negligible impact of other boundary conditions. A decrease of the extrudate velocity is seen to be also an effective control parameter, but it decreases the production rates. Reprinted by permission of the publisher.; DOI: 10.1002/pen.20249; (AN 501063402)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 7

Don’t Forget Zone ‘Zero’. By: Frankland, Jim. Plastics Technology, December 2010, Vol. 56 Issue 12, p14-15, 2p Abstract: The writer discusses the thermal aspects of feed-throat design. Adjusting a feed throat temperature is the only way to maximize its performance. However, it is not an easy task because the only control usually provided by the machine manufacturer is a coolant valve, which is not designed for accurate flow control. During the day, the coolant temperature and flow rate often change as the requirement or temperature changes inside or even outside the facility. This issue can be solved by including a modulating valve as a flow control; however, such solution does not optimize feed throat performance, although it keeps the feed throat at a fixed point.; (AN 501712946)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 8

Dynamical Systems in Pin Mixers of Single-Screw Extruders. By: Hwang, W. R.; Kang, K. W.; Kwon, T. H.. AIChE Journal, Jul2004, Vol. 50 Issue 7, p1372-1385, 14p Abstract: Dynamical systems generated by various types of pin mixers were studied for the application to the single-screw extruders. A periodic unit of the pin mixer was modeled as a dynamical system of the complex duct flow. It was found that the cross-sectional space could be divided into two distinct regions: the inner and outer zones. The pin configuration directly affects the motion of fluid particles in the inner region, while motion in the outer region is governed by the resonance phenomena. The effects of the number of pins, the pin height, the pin orientation, and the composition of two different pin units were studied with the numerical results and explained in the language of the dynamical systems theories. Finally, the validity of our modeling, and the numerical result was verified by qualitative comparison with experimental results. Reprinted by permission of the publisher.; DOI: 10.1002/aic.10130; (AN 501010337)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 9

Extruder Inspection & Vibration Analysis Detects Problems Early, Prevents Failures. By: Callari, James. Plastics Technology, Jun2012, Vol. 58 Issue 6, p15-17, 2p Abstract: The article offers information on Henschel America’s inspection/analysis service for all types of extrusion processors for all types and makes of extruders and motors.; (AN 76598225)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 10

Extrusion Outputs Go Through the Roof. By: Schut, Jan H.. Plastics Technology, January 2008, Vol. 54 Issue 1, p60-65, 6p Abstract: The writer reviews the plastics extrusion technology exhibited at the K 2007 show in Dusseldorf, Germany, in September. The use of bigger torque motors, high speed film and coating technology, improved technology for making barrier sheet, the technology used to make polyvinyl chloride profiles and pipe, and the technology used to make high-density polyethylene pipe and tubing are discussed.; (AN 501527958)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 11

Extrusion systems. / product lines reviewed Plastics Technology, Aug97, Vol. 43, p123-135, 13p Abstract: Part of Plastics Technology’s 1997/98 Manufacturing Handbook & Buyers’ Guide. Details of products from suppliers of extrusion systems are provided.; (AN 500488830)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 12

Extrusion systems. / product lines reviewed Plastics Technology, Aug96 Supplement Handbook, Vol. 42, p127-138, 12p Abstract: Part of Plastics Technology’s Manufacturing Handbook & Buyers’ Guide 1996/97. The extrusion system product lines of various manufacturers are reviewed.; (AN 500345340)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 13

Extrusion systems; product lines reviewed. Plastics Technology, Mid-July 1993, Vol. 39, p211-236, 26p Abstract: Part of the 1993/94 Plastics Technology Manufacturing Handbook & Buyers’ Guide. The product lines of suppliers of extrusion systems, including pelletizers and dicers, to the plastics manufacturing industry are reviewed. Product data sheets from a number of suppliers are also included.; (AN 500144458)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 14

Extrusion. By: Schut, Jan H.. Plastics Technology, Sep2004, Vol. 50 Issue 9, p68-76, 6p Abstract: Part of a special section on K 2004. A preview of some of the advances in extrusion technology at the K 2004 show is presented. Direct-drive extruders with gearless drives in various configurations will be exhibited. There will be a planetary extruder for wood composites, standardized pipe and profile extruders and modules, and hybrid blown film die and some winders.; (AN 501027911)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 15

Extrusion. By: Schut, Jan H.. Plastics Technology, June 2000, Vol. 46 Issue 6, p45-56, 12p Abstract: Part of a special section on the plastic equipment that will be on display at NPE 2000. Extrusion equipment is discussed.; (AN 500692320)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 16

Extrusion. By: Schut, Jan H.. Plastics Technology, August 2000, Vol. 46 Issue 8, p33-41, 9p Abstract: Part of a special supplement on NPE 2000. New developments in extrusion introduced at NPE included new processes to put wood flour into plastic, new methods of cooling and handling of wood-filled profiles, the first nitrogen cooling tank, and plenty of technical firsts in foaming.; (AN 500605252)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 17

Extrusion. By: Schut, Jan H.. Plastics Technology, August 2006, Vol. 52 Issue 8, p72-87, 12p Abstract: Extrusion equipment trends at NPE 2006 in Chicago, Illinois, are detailed. Incremental advances in film, sheet, pipe, and profile extrusion were evident at the show. The major trends included the increased use of new automation devices, dies that speed color and product changes and reduce scrap, and more efficient ways to heat and cool.; (AN 501292901)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 18

Extrusion. / Modern Plastics Encyclopedia, 1988 Modern Plastics, 1987, Vol. 64, p228-238, 11p; (AN 501830065)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 19

Extrusion. By: Schut, Jan H.. Plastics Technology, January 1999, Vol. 45 Issue 1, p50-53, 4p Abstract: Part of a special section describing the most important technological developments relevant to North American readers that were unveiled at the recent K’98 show in Dusseldorf, Germany. Some of the developments made in extrusion shown at K’98 are described. Advances in cone-shaped, screwless extruders; simultaneous biaxial orientation for films; tungsten barrel and screws; and micro coextruders are highlighted.; (AN 500469255)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 20

For Troubleshoot Profile Extrusion, First Get to Know All the Variables. By: Cykana, Daniel. Plastics Technology, Aug2011, Vol. 57 Issue 5, p30-31, 2p Abstract: The article discusses the process involved in profile extrusion “complex.” It cites the segments of the profile extrusion process which include extruder, tooling, sizing/cooling, takeoff, and ancillary downstream. The article identifies the cause of typical problems that arise from profile extrusion such as aesthetic flaws, size variance, and dimensional variations. It proposes the use of hardware and software solutions to address profile extrusion problems.; (AN 513206375)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 21

Get Smarter on Extruder Sizes. By: Frankland, Jim. Plastics Technology, Jul2012, Vol. 58 Issue 7, p22-22, 1p Abstract: The article discusses the disadvantages of using an oversized extruder. According to the author, although an oversized extruder can provide flexibility, it can also result to higher operating costs. He explains that DC drives are more expensive to operate than AC drives at low speeds and larger extruders increase thermal losses to the environment because the latter are proportional to the extruder’s heated surface area. He adds that a larger extruder also requires more time to start up.; (AN 77847020)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 22

How to Clean Screws Nondestructively. By: Womer, Timothy W.. Plastics Technology, July 2009, Vol. 55 Issue 7, p23-24, 2p Abstract: The writer offers advice about how maintenance departments can nondestructively clean screws used in the plastics processing industry.; (AN 501449258)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 23

How to Compare Barrier Screws. By: Dray, Robert. Plastics Technology, December 2002, Vol. 48 Issue 12, p46-59, 5p Abstract: A quick method of evaluating barrier screw designs is presented. A computer simulation, developed to guide comparison, can distinguish easily the melting capabilities of different barrier designs. Computer simulations are based on the concept that the area of the primary melting channel is the major influence on a barrier screw’s melting capacity, though depth of the channel also plays a role. The simulation results are verified with tests of the 3 basic screw designs and the 6 improvement designs.; (AN 500958052)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 24

How to select an extruder screw. By: Rauwendaal, Chris. Plastics World, June 1990, Vol. 48, p56-60, 5p Abstract: Selection of a good extruder screw can substantially improve the chances of having a successful extrusion operation. The extruder screw is crucial to improving process stability in extrusion because the variation of pressure and temperature is generally quite rapid and process control schemes are usually not successful. Important factors to consider when choosing an extruder screw are output requirements, downstream venting, feeding-section geometry, and material. Other components for successful extrusion include a bulk density of more than 50 percent of the actual density so that the bulk material will be easy to convey. The design of the extruder is largely dependent on the plastic’s melt flow properties and the amount of pressure to be generated in the melting section. Finally, for the extruder to deliver a high quality melt to the end of the screw, the plasticating or melting process has to be finished a considerable distance before the end of the screw.; (AN 501756540)
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Database:
Business Abstracts with Full Text (H.W. Wilson)

Record: 25

If He Built It, It Will Run. By: Callari, James J.. Plastics Technology, November 2011, Vol. 57 Issue 11, p56-56, 1p Abstract: The article presents a discussion of the manufacturing strategy of Standridge Color Corp. (SCC) based in Social Circle, Georgia, adapted from an article by Matt Danford published in the June 2011 issue of the periodical “Modern Machine Shop.”; (AN 527172055)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 26

keeping up with technology. Plastics Technology, November 2011, Vol. 57 Issue 11, p45-45, 1p Abstract: The article offers information on several plastic processing equipment including the Boy 22 E injection molding machine with servo-motor pump drive from Boy Machines Inc., PCT3 Series desiccant dryer from Universal Dynamics Inc. and the HO-LT line of single-screw extruders from SML Extrusion Technology.; (AN 527172063)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 27

Look Before You Leap: When Direct Extrusion Makes Sense. By: Martin, Charlie. Plastics Technology, July 2011, Vol. 57 Issue 7, p22-25, 4p Abstract: The article discusses the use of direct extrusion (DE) technology, which requires twin-screw extruders for inline compounding and extrusion, in directly converting materials like pellets and fillers into the final product. DE reportedly offers extrusion processors cost and time savings, and improved product quality. However, it is stated that DE is not readily adoptable and is best suited for higher volume, dedicated production systems rather than on lines with frequent product or formulation changes.; (AN 502032755)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 28

Look upstream to root out film flaws. / troubleshooting cast-film extrusion lines By: Callari, Jim. Plastics World, December 1991, Vol. 49, p90-91, 2p Abstract: Processors troubleshooting cast-film extrusion lines will likely have to look upstream to find the problem. A table lists 16 film problems, their probable causes, and possible solutions.; (AN 512446277)
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Database:
Business Abstracts with Full Text (H.W. Wilson)

Record: 29

Mathematical modeling of melting of polymers in a single-screw extruder. By: Elbirli, B.; Lindt, J. T.; Gottgetreu, S. R.. Polymer Engineering & Science, Aug1984, Vol. 24, p988-999, 12p; DOI: 10.1002/pen.760241208; (AN 500109606)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 30

Melt pump fits on extruder screw. / Wave Pump Plastics World, July 1985, Vol. 43, p7-8, 2p; (AN 500805037)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 31

Melting mechanism in single screw extrusion. By: Bruker, Izi; Balch, Gary S.. Polymer Engineering & Science, Feb1989, Vol. 29, p258-267, 10p; DOI: 10.1002/pen.760290407; (AN 501619791)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 32

Milacron’s new single-screw line. Plastics Technology, July 1991, Vol. 37, p71-72, 2p; (AN 501891977)
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<A href=”http://ezproxy.memphis.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=asf&AN=501891977&site=ehost-live”>Milacron’s new single-screw line.</A>
Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 33

Modeling of the plasticating process in a single-screw extruder: a fast-track approach. By: Lai, Eugene; Yu, Ding Wen. Polymer Engineering & Science, May 2000, Vol. 40 Issue 5, p1074-1084, 11p Abstract: The authors present a mathematical model for the analysis of the entire flow field of a single screw extruder under steady-state conditions. The model does not have partial differential equations, avoiding the use of empirical factors or correlation. The model achieves good agreement with experimental results for predicting the solid-bed width profile, the axial pressure profile, and the temperature and pressure of the melt pool at the extruder exit.; DOI: 10.1002/pen.11235; (AN 500678760)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 34

More muscle in single-screw compounding. By: Schut, Jan H.. Plastics Technology, December 1998, Vol. 44 Issue 13, p38-38, 1p Abstract: A compounder that is believed to be the world’s first high-speed, high-torque single-screw compounding extruder has been installed at McCann Plastics Inc., North Canton, Ohio. The device, which was developed by HPM Corp., Mount Gilead, Ohio, produces 1,200 to 1,500 lb/hr of 40 percent talc-filled polypropylene and up to 3,000 lb/hr of polystyrene and acrylonitrile-butadiene-styrene. A patented triple-wave screw in the machine assists its productivity. Color changes that are at least 50 percent faster than on conventional screw compounders can be achieved using the new device.; (AN 500456998)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 35

More tips for mixing in single-screw extruders. By: Rauwendaal, Chris. Plastics World, January 14 1991, Vol. 49, p43-47, 5p Abstract: Plastics companies can improve dispersive mixing in single-screw extruders by making certain design specifications and using a fluted mixing section. Dispersive mixing involves blending a fluid with a solid filler. It can be made more efficient by having a region where the material is subjected to high stresses for a short time and subjecting all fluid elements to the same high-stress level. Dispersive mixing also requires that the mixing section have a minimum pressure drop, streamlined flow, and a complete wipe of the barrel surface and that it be operator friendly and not too expensive. For mixing heat-sensitive material, planetary gear extruders (PGEs) can be used. PGEs offer good dispersive and distributive mixing, very good heat transfer between material and barrel, effective devolatilization, uniform mixing, and good self-cleaning action.; (AN 501833776)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 36

New Barrel Heater/Cooler Saves ‘Juice” to Run an Extruder. By: Callari, James J.. Plastics Technology, Aug2011, Vol. 57 Issue 5, p15-17, 3p Abstract: The article offers information on the energy-efficient, air-cooled, electrically-heated (EEACEH) technology for extruder barrel design. The EEACEH barrel extruder was developed Davis-Standard LLC and uses a damper valve system to reduce convection heat losses. The article also notes the test findings of the EEACEH design in comparison to the single-screw extruder with air-cooled, electrically heated (ACEH) barrel.; (AN 513206397)
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Database:
OmniFile Full Text Mega (H.W. Wilson)

Record: 37

New extrusion lines run tighter, leaner. / Düsseldorf trade fair By: Lodge, Charles. Plastics World, January 1990, Vol. 48, p28-34, 7p; (AN 501712221)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 38

New Presses, Robots And Low-Pressure Process. By: Knights, Mikell. Plastics Technology, June 2008, Vol. 54 Issue 6, p45-76, 2p Abstract: New products from Arburg, Germany, and a new low-pressure process from IB Steiner and Hybrid Composite Products, Austria, are discussed. The products include a large all-electric injection machine; a large vertical hydraulic machine; and entry-level, 3-axis, top-mounted beam robots. The Exjection low-pressure process can allow discrete features to be included in long, thin-walled injection molded products.; (AN 501261392)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 39

Novel Vacuum Calibrators Raise Sheet Output and Quality. By: Schut, Jan H.. Plastics Technology, September 2006, Vol. 52 Issue 9, p45-45, 1p Abstract: Omipa SpA of Italy has patented a calibrator that creates an air cushion on flat calibrators used to produce hollow profile sheet. The air cushion floats the sheet between the calibrators, reducing friction and improving cooling. These lead to an improvement in surface smoothness and output, respectively. In another development, ESI Extrusion Services Inc., Akron, Ohio, has found a way to improve the surface finish of wood-plastic composite using a flat calibrator system.; (AN 501305585)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 40

NPE News in Compounding. By: Schut, Jan H.. Plastics Technology, Jun2009, Vol. 55 Issue 10, p58-60, 3p Abstract: A preview of compounding equipment that will be on view at the 2009 National Plastics Exhibition is presented.; (AN 501435768)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 41

NPE News in Extrusion. By: Schut, Jan H.. Plastics Technology, Jun2009, Vol. 55 Issue 10, p40-47, 8p Abstract: A preview of extrusion equipment that will be on view at the 2009 National Plastics Exhibition is presented.; (AN 501435775)
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<A href=”http://ezproxy.memphis.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=asf&AN=501435775&site=ehost-live”>NPE News in Extrusion.</A>
Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 42

NPE News Wrap-Up: Extrusion. By: Schut, Jan H.. Plastics Technology, August 2003, Vol. 49 Issue 8, p74-83, 8p Abstract: An overview of new extrusion technologies on display at the 2003 NPE Show, which was held in Chicago, Illinois, is presented.; (AN 500873080)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 43

Proper Alignment Saves Wear & Tear…or Worse. By: Frankland, Jim. Plastics Technology, December 2009, Vol. 55 Issue 12, p14-15, 2p Abstract: The writer discusses proper extruder alignment techniques. To maintain a good alignment, barrel supports of the proper design are crucial. The barrel must be able to freely expand through the support as it is heated, with no distortion. In addition, the barrel should never be locked down by a support that completely surrounds it to prevent it from sliding easily when expanding. The support points must be made from noncorrosive material such as brass to prevent corrosion from freezing the support. Equally important, the entire barrel support must be rigid enough to maintain its position as the barrel expands.; (AN 501527995)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 44

Putting the screws on extrusion. By: Ondrey, Gerald. Chemical Engineering, August 1996, Vol. 103, p41-41, 1p Abstract: Extrusion is raising throughput and enhancing product quality in food processing, pharmaceutical production, and pulp and paper manufacturing. Extruders can handle mixing, kneading, homogenizing, melting, cooling, pelletizing, and other process steps by using twin-screw extruders and modular designs and applying knowledge gained from plastics processing. Most of the recent improvements in extrusion technology involve twin-screw extruders, which consist of intermeshing screws that are housed in a chamber, through which ingredients are transported by the pitch of the screws.; (AN 500350449)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 45

Screen Changer Controls Allows Total Process Integration. Plastics Technology, Aug2012, Vol. 58 Issue 8, p46-46, 1/3p Abstract: The article offers brief information on the screen-changer controls from High-Technology Corp.; (AN 78395537)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 46

Screw Surging, Part III: Unfilled Discharge Section. By: Frankland, Jim. Plastics Technology, May2011, Vol. 57 Issue 6, p25-25, 1p Abstract: The writer discusses surging caused when the discharge end of the screw is only partially filled. This type of surge occurs most frequently with two-stage screws when the second stage has far more capacity than the first stage. It can also occur when a screw is limited in feeding or melting, causing a partially filled metering section. Screw surging can be addressed by increasing the discharge pressure on the extruder. This can be done by introducing screen packs when a melt pump is not used, and increasing the suction pressure when using a melt pump. Another solution is to adjust the screw design to better fill the discharge area for more fill length.; (AN 502037592)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 47

Shh … Can You Hear the New Extruder Motors? By: Schut, Jan H.. Plastics Technology, Nov2004, Vol. 50 Issue 11, p50-55, 6p Abstract: The writer discusses new, ring-shaped, high-torque, permanent-magnet synchronous extruder motors. These motors are compact, quiet, and use less energy than their predecessors. Most machine builders are reacting cautiously to the technology. However, several European machine builders are developing extruders with these new motors.; (AN 501051471)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 48

Shredder/extruder cuts plant-waste reclaim costs. By: Callari, Jim. Plastics World, November 1989, Vol. 47, p26-26, 1p; (AN 501696303)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 49

Single screw can run powder, pellets. / from PVC; Brabor’s Double Mixing Screw By: Callari, Jim. Plastics World, July 1993, Vol. 51, p10-10, 1p Abstract: Italian machine builder Brabor is offering the Double Mixing Screw, a new type of screw that can run polyvinyl chloride (PVC) in the form of powder, pellets, and regrind. Several major vinyl window makers, including Mikron Industries of Kent, Washington, are using the U.S.-patented device mostly to produce noncritical, lower-tolerance lineals such as beads, tracks, or setting blocks. Brabor claims that the new screw can be used to process PVC powder into large mainframe sections as well.; (AN 500137528)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 50

Studies on wire coating extrusion. By: Han, C. D.; Rao, D.. Polymer Engineering & Science, Jun1980, Vol. 20, p128-139, 12p; (AN 517270246)
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Database:
Applied Science & Technology Index Retrospective: 1913-1983 (H.W. Wilson)

Record: 51

Studies on wire coating extrusion. / the rheology of wire coating extrusion By: Han, C. D.; Rao, D.. Polymer Engineering & Science, October 1978, Vol. 18, p1019-1029, 11p; (AN 517103800)
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Database:
Applied Science & Technology Index Retrospective: 1913-1983 (H.W. Wilson)

Record: 52

Take the Guesswork Out Of Profile-Cooling Needs. Plastics Technology, Apr2012, Vol. 58 Issue 4, p5-5, 1/5p Abstract: The article offers information on simulation software and the Bessemer Series of downstream extrusion equipment including cooling tanks, pullers and cutters, both from Novatec. Inc. in Baltimore, Maryland.; (AN 74293732)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 53

The Archimedean screw as an extruder; historical note. By: Bata, George L.. Polymer Engineering & Science, Jun1984, Vol. 24, p624-625, 2p; DOI: 10.1002/pen.760240903; (AN 500091382)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 54

the practical processor. By: Womer, Tim; Schmid, Drew. Plastics Technology, October 2011, Vol. 57 Issue 10, p58-58, 1p Abstract: The article presents questions and answers related to plastics processing including the optimum soak time during a cold startup, the types of resins that can cause plateout, and whether installing a 10-horsepower motor can prevent jamming of granulator.; (AN 525579071)
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<A href=”http://ezproxy.memphis.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=asf&AN=525579071&site=ehost-live”>the practical processor.</A>
Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 55

The Truth About Barrel Heating. By: Frankland, Jim. Plastics Technology, Feb2011, Vol. 57 Issue 9, p12 Abstract: In the article, the author discusses barrel heating in the plastic molding process. He claims that the major purpose of the heaters are to melt the polymer in the barrel during cold startup. He also examines the effect of the extruder design, particularly the design of the screw, in the efficiency of the molding process.; (AN 525479922)
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<A href=”http://ezproxy.memphis.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=asf&AN=525479922&site=ehost-live”>The Truth About Barrel Heating.</A>
Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 56

Torque & Speed: How Much is Enough? By: Schut, Jan H.. Plastics Technology, September 2002, Vol. 48 Issue 9, p60-65, 5p Abstract: Before plastics processors invest in extrusion equipment, they should consider the torque and speed that the materials they process can withstand. High speed does not suit shear-sensitive resins like LCPs and high-performance nylons, heat-sensitive additives, and very low-viscosity materials or low-bulk-density materials. In addition, the majority of high-torque/high-speed machines are vented but are ineffective in processes that require devolatilization.; (AN 500916011)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 57

Troubleshooting melt fracture. By: Rauwendaal, Chris. Plastics Technology, October 2001, Vol. 47 Issue 10, p53-55, 3p Abstract: The writer offers advice on how to find the cause of melt fracture in single-screw extrusion. When trouble strikes a processing line, it is important to have a strategy in place to quickly identify the cause of the problem. A troubleshooting timeline, which is a record of all events leading up to a problem, is an essential part of this strategy.; (AN 500808346)
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<A href=”http://ezproxy.memphis.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=asf&AN=500808346&site=ehost-live”>Troubleshooting melt fracture.</A>
Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 58

Understanding Screw Breakage. By: frankland, jim. Plastics Technology, Aug2013, Vol. 59 Issue 8, p21-21, 1p Abstract: In this article the author explains the causes for extrusion screw breakage, stressing that bending causes more cracks than over-torque failures. He describes the effects of over-torque failures which are easily identifiable as they occur in the screw’s feed section, resulting in radial cracks. Discussed are the characteristics of screw bending failures which show as single cracks and which do not result in pitch reduction or the so-called wind-up effect.; (AN 89591511)
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Applied Science & Technology Full Text (H.W. Wilson)

Record: 59

What’s New at the Show in Extrusion. By: Schut, Jan H.. Plastics Technology, September 2007, Vol. 53 Issue 9, p74-79, 6p Abstract: An overview of extrusion machines that will be on show at K 2007 in Dusseldorf in October is presented. Machines capable of high-rpm extrusion of thin sheet, film, and tube will be a feature of the show. Additionally, there will be a trend toward larger extruders for cast film to gain output efficiency, new systems in pipe and profile having more flexibility to change output and product sizes, and new screws, dies, and air rings from blown film machine builders designed to raise output 20 to 30 percent and accommodate resin changes with greater flexibility.; (AN 501471350)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 60

What’s the Deal With High-Speed Extruders? By: Frankland, Jim. Plastics Technology, Jun2012, Vol. 58 Issue 6, p27-27, 1p Abstract: The article provides an overview of the performance of modern high-speed extruders. The author observes that many modern high-speed extruders have direct drive with no gearbox. Some of the advantages of high-speed extruders are reduced capital investment based on output, reduced floor-space requirement and improved electrical efficient due to no gearbox losses and less surface area for heat dissipation.; (AN 76598228)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 61

Who’s who in extrusion machinery. By: Callari, James J.. Plastics World, May 1991, Vol. 49, p77 Abstract: A directory of extrusion equipment suppliers outlines the product lines, processes, specialties, and support services offered by each supplier. Addresses, phone numbers, and the names of key contacts are included.; (AN 501869155)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)

Record: 62

Why I Still Like Analog Meters. By: frankland, jim. Plastics Technology, Jan2013, Vol. 59 Issue 1, p18-18, 1p Abstract: The author discusses his preference for analog meters in diagnosing extruder control system problems. Aside from feed restrictions, he explains that these meters help determine problems which include external inconsistencies, poor temperature profiles, and melt-channel plugging. He adds that issues concerning hopper loaders, regrind variation, and crammers may be investigated with the use of these meters. He also describes how digital meters can affect diagnosis ability of process engineers.; (AN 84976197)
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Applied Science & Technology Full Text (H.W. Wilson)

Record: 63

Wire coating extrusion—an approximate solution. By: Tiu, Carlos. Polymer Engineering & Science, Jul1986, Vol. 26, p957-961, 5p; DOI: 10.1002/pen.760261307; (AN 501194222)
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Database:
Applied Science & Technology Full Text (H.W. Wilson)


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