Vent Temp Sensor Profile of Machine Melt to Mold Part Eject Cycle
Mold close melt inject volume to open part eject thermal profile is now know for each molding cycle. A mold eject side vent sensor profiled melt volume inject rate to final eject state. The “instant” thermal rise from convected heat released with …
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Tips for Ultrasonic Welding
Ultrasonic welding involves converting high-frequency electrical energy (generally 15-40 kHz) to high frequency mechanical energy in the form of reciprocating vertical motion. The welding tool, the horn, delivers …
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Prognostic Medical Devices —The Wave of the Future
Imagine a world where disease could be predicted before it happens, instead of diagnosed and cured by drugs or surgery. Where doctors could change a patient’s life style, diet and exercise, and prevent the disease.A Bishop once told me, long ago before the advent of the diagnostics revolution, that God designed the human body to produce very small amounts of antigens to signal the advent of diseases, and was just waiting for man to rise to the level of intelligence to create devices that would be able to detect these. Download Full Article>
Accounting for Residual Stress in Injection Molded Parts
Injection molding has been the dominate process for producing complex, tight tolerance plastic parts. The plastic resin experiences aggressive conditions during the process, which is driven by the need to economically manufacture these components while maintaining the desired tolerances and surface aesthetics. From the shear deformation the polymer molecules experience as they are being melted and injected into the mold, to the rapid cooling of the resin as it comes into contact with the cold mold wall, the orientation and extension of the polymer chains change significantly from its original state. Additionally, the polymer chains cannot always get back into the state they want to be in, which leaves those areas of the part in a non-ideal state that develops stress from molding. This stress is often referred to as residual stress, or molded-in stress.
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Film-insert Injection Compression Molding for Reinforced Polycarbonate with Woven Glass Fiber Oriented 90/0°, ± 45 º
To widen the range of application for plastic materials, new polymer composites with added reinforcing materials on the plastic matrix are being developed increasingly replacing components made of metal or thick-walled plastic parts, most commonly, with short fiber glass reinforcement 1, 2. They provide high levels of strength at extremely low weights and can be manufactured in short cycle times in large industrial quantities. Being materials reinforced with short fiber (0.2 to 0.4 mm in length, and larger fibers with lengths greater than 1mm) are affected the mechanical properties, strength, stiffness, and impact with no location of failure caused by anisotropic material due to the non-uniform fiber orientation distribution.
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Prognostic Medical Devices —The Wave of the Future
Imagine a world where disease could be predicted before it happens, instead of diagnosed and cured by drugs or surgery. Where doctors could change a patient’s life style, diet and exercise, and prevent the disease.
A Bishop once told me, long ago before the advent of the diagnostics revolution, that God designed the human body to produce very small amounts of antigens to signal the advent of diseases, and was just waiting for man to rise to the level of intelligence to create devices that would be able to detect these.
Download Full Article: Prognostic Medical Devices
