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U.S. Department of Commerce proposes stiff tariffs on steel imports
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WASHINGTON—The U.S. Department of Commerce is recommending stiff tariffs on steel imports into the U.S., encouraging representatives of the domestic steel industry but alarming U.S. tire...
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WASHINGTON—The U.S. Department of Commerce is recommending stiff tariffs on steel imports into the U.S., encouraging representatives of the domestic steel industry but alarming U.S. tire manufacturers dependent on imported tire-grade steel cord. WASHINGTON—The U.S. Department of Commerce is recommending stiff tariffs on steel imports into the U.S., encouraging representatives of the domestic steel industry but alarming U.S. tire manufacturers dependent on imported tire-grade steel cord. $WASHINGTON—The U.S. Department of Commerce is recommending stiff tariffs on steel imports into the U.S., encouraging representatives of the domestic steel industry but alarming U.S. tire manufacturers dependent on imported tire-grade steel cord.
GM shows progress in efforts to promote sustainable rubber
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WASHINGTON—In May 2017, General Motors Co. unveiled a program to promote environmentally sound, sustainable rubber production. Representatives of the world's largest tire...
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WASHINGTON—In May 2017, General Motors unveiled a program to promote environmentally sound, sustainable rubber production. WASHINGTON—In May 2017, General Motors unveiled a program to promote environmentally sound, sustainable rubber production. $WASHINGTON—In May 2017, General Motors unveiled a program to promote environmentally sound, sustainable rubber production.
Acquisition of A. Schulman doubles LyondellBasell's annual sales, capacities
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FAIRLAWN, Ohio—Joseph Gingo grew up knowing all about A. Schulman Inc. His father worked at the company's first plant. He remembers meeting founder Alex Schulman at company picnics when he...
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FAIRLAWN, Ohio—LyondellBasell Industries is acquiring A. Schulman in a $2.25 billion deal that adds Schulman's $2.5 billion in annual sales, 54 manufacturing sites and 2.4 billion pounds of production capacity to LBI's own polypropylene compounding unit. FAIRLAWN, Ohio—LyondellBasell Industries is acquiring A. Schulman in a $2.25 billion deal that adds Schulman's $2.5 billion in annual sales, 54 manufacturing sites and 2.4 billion pounds of production capacity to LBI's own polypropylene compounding unit. $FAIRLAWN, Ohio—LyondellBasell Industries is acquiring A. Schulman in a $2.25 billion deal that adds Schulman's $2.5 billion in annual sales, 54 manufacturing sites and 2.4 billion pounds of production capacity to LBI's own polypropylene compounding unit.
U.S. demand for high-performance tires continues to rise
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AKRON—Demand for high-performance tires in the U.S. increased in 2017 for the eighth straight year and now accounts for nearly 56 percent of original equipment and 45 percent of replacement...
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AKRON—Demand for high-performance tires in the U.S. increased in 2017 for the eighth straight year, according to latest U.S. Tire Manufacturers Association data. AKRON—Demand for high-performance tires in the U.S. increased in 2017 for the eighth straight year, according to latest U.S. Tire Manufacturers Association data. $AKRON—Demand for high-performance tires in the U.S. increased in 2017 for the eighth straight year, according to latest U.S. Tire Manufacturers Association data.
LyondellBasell buying A. Schulman for $2.25 billion in big materials shakeup
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HOUSTON—In a major global plastics materials deal, LyondellBasell Industries is acquiring A. Schulman Inc. for $2.25 billion. LBI—based in Houston and London—is one of the...
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HOUSTON—In a major global plastics materials deal, LyondellBasell Industries is acquiring A. Schulman for $2.25 billion. HOUSTON—In a major global plastics materials deal, LyondellBasell Industries is acquiring A. Schulman for $2.25 billion. $HOUSTON—In a major global plastics materials deal, LyondellBasell Industries is acquiring A. Schulman for $2.25 billion.
NHS deal would help Vystar's growth
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WORCESTER, Mass.—Vystar Corp.'s letter of intent to acquire NHS Holdings L.L.C. is the first step in Vystar's plans for growth, according to Steve Rotman, founder of NHS and new CEO of...
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WORCESTER, Mass.—Vystar's letter of intent to acquire NHS Holdings is the first step in Vystar's plans for growth, according to Steve Rotman, founder of NHS and new CEO of Vystar. WORCESTER, Mass.—Vystar's letter of intent to acquire NHS Holdings is the first step in Vystar's plans for growth, according to Steve Rotman, founder of NHS and new CEO of Vystar. $WORCESTER, Mass.—Vystar's letter of intent to acquire NHS Holdings is the first step in Vystar's plans for growth, according to Steve Rotman, founder of NHS and new CEO of Vystar.
Wacky World of Rubber: 'Why didn't I think of that?'
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I'm dedicating this installment of Wacky World of Rubber to all of those who have said, "Why didn't I think of that?" This is the success story of a family-owned company out of Saint George, Utah,...
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I'm dedicating this installment of Wacky World of Rubber to all of those who have said, "Why didn't I think of that?" This is the success story of a family-owned company named Squatty Potty, which has gained a cult-like following for its signature product. I'm dedicating this installment of Wacky World of Rubber to all of those who have said, "Why didn't I think of that?" This is the success story of a family-owned company named Squatty Potty, which has gained a cult-like following for its signature product. $I'm dedicating this installment of Wacky World of Rubber to all of those who have said, "Why didn't I think of that?" This is the success story of a family-owned company named Squatty Potty, which has gained a cult-like following for its signature product.
RD Abbott printer helps cut the prototyping process
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CERRITOS, Calif.—R.D. Abbott Co. Inc. is looking to help spread the word in North America about the liquid silicone rubber 3D printing technology developed by German RepRap GmbH and Dow...
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CERRITOS, Calif.—R.D. Abbott is looking to help spread the word in North America about the liquid silicone rubber 3D printing technology developed by RepRap and Dow Performance Silicones. CERRITOS, Calif.—R.D. Abbott is looking to help spread the word in North America about the liquid silicone rubber 3D printing technology developed by RepRap and Dow Performance Silicones. $CERRITOS, Calif.—R.D. Abbott is looking to help spread the word in North America about the liquid silicone rubber 3D printing technology developed by RepRap and Dow Performance Silicones.
Bridgestone, Versalis form strategic partnership
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NASHVILLE, Tenn.—Bridgestone Americas Inc. is forming a strategic partnership with Italian polymer and elastomer giant Versalis S.p.A. to  to develop and use a comprehensive technology...
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NASHVILLE, Tenn.—Bridgestone Americas is forming a strategic partnership with Italian polymer and elastomer giant Versalis to develop and use a comprehensive technology package to commercialize guayule in the agricultural, sustainable rubber and renewable chemical sectors. NASHVILLE, Tenn.—Bridgestone Americas is forming a strategic partnership with Italian polymer and elastomer giant Versalis to develop and use a comprehensive technology package to commercialize guayule in the agricultural, sustainable rubber and renewable chemical sectors. $NASHVILLE, Tenn.—Bridgestone Americas is forming a strategic partnership with Italian polymer and elastomer giant Versalis to develop and use a comprehensive technology package to commercialize guayule in the agricultural, sustainable rubber and renewable chemical sectors.
Export curbs fail to lift natural rubber prices
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LONDON—Moves to curb natural rubber exports by the main producing countries seem to have had little positive impact on prices for the commodity, so far at least.Indeed, prices showed signs...
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LONDON—Moves to curb natural rubber exports by the main producing countries seem to have had little positive impact on prices for the commodity, so far at least. LONDON—Moves to curb natural rubber exports by the main producing countries seem to have had little positive impact on prices for the commodity, so far at least. $LONDON—Moves to curb natural rubber exports by the main producing countries seem to have had little positive impact on prices for the commodity, so far at least.
Digital Edition
Digital Edition
Published on January 1, 2006

Effect of Thermal Loading and Heater Failure on Thermal Performance

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Date Published January 1, 2006
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This Report has been authored by:Eugene Ryzer at Acrolab Ltd.

The objective of this research was to compare the thermal response of standard platen and Isoplaten when they are subjected to different thermal loads and heater failures. These types of electrically heated platens are typically used in the rubber molding industry to maintain a uniform temperature distribution within the molds. The part quality in the molding process is significantly improved when the platen is operated at a uniform temperature. Previous studies have found that Isoplatens can significantly improve mold performance by eliminating hot spots and reduce cycle times. In this study, the thermal response of Isoplaten and standard heated Platen is compared in terms of their temperature distributions and thermal transient response times under different thermal loading conditions. The platen tested included heaters only. The Isoplaten tested contained same heaters and Isobars. The platens tested in this study were 457 mm x 457mm and 63 mm thick, with six 12mm diameter by 457 mm long 1000 W cartridge heaters embedded evenly along the bottom half of the platen. The platens were operated at 150°C, and the thermal loads were applied using a pre-determined amount of water to simulate the loading in a typical rubber molding application. Tests were performed with different thermal load contact areas at several locations on the platen surface. The transient temperature response of the platen and Isoplaten under the thermal load was characterized using a FLIR SC 3000 high-speed thermal imaging system. This system measured the temperature distribution of the whole platen surface to an accuracy of 0.1°C at a frame rate up to 900 frames per second. The transient and steady-state thermal performance of the platens was also characterized with different heaters turned off to characterize the performance of the platen under different failure modes. To obtain direct visualization of the temperature distribution of the heated surface at the point of loading, a hollow cylindrical cup was used to apply the water. In this concept, a hollow cylinder was placed directly on the platen and the platen surface acted as the bottom of the load ‘container’ through an o-ring seal. The infrared camera measured the surface temperature distribution within the load area once the water evaporated. This method of testing provided temperature data over the entire load area. 
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