Hot Runner Technology
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منابع مشابه
Exploring High-Velocity NH3(6,6) Emission at the Center of our Galaxy
Using the NH3 (6,6) transition, which samples dense (∼ 10 ) molecular gas with an energy above ground of 412 K, we find hot gas at high velocities (–142 to –210 km s) associated with the central 2 pc of the Galactic center. This material may be either infalling gas due to shocks or tidal stripping, or possibly gas swept from the nuclear region. We identify two high-velocity features, which we c...
متن کاملParametric Design of an Ultrahigh-Head Pump-Turbine Runner Based on Multiobjective Optimization
Pumped hydro energy storage (PHES) is currently the only proven large-scale energy storage technology. Frequent changes between pump and turbine operations pose significant challenges in the design of a pump-turbine runner with high efficiency and stability, especially for ultrahigh-head reversible pump-turbine runners. In the present paper, a multiobjective optimization design system is used t...
متن کاملPolymer Injection Molding Technology for the Next Millennium
Injection molding technology continually develops, with major milestones including the introduction of the first thermoplastic materials, the reciprocating screw design, the first hot runner systems, engineering materials, the introduction of microprocessors for machine control, Computer Aided Engineering flow simulation software, and recently the application of expert systems for optimized mac...
متن کاملThe Acute and Chronic Gastritis of Hot Climates
acute form commonly called dyspepsia, as being, in my mind, the most important of the two?inasmuch as is much more frequent, the suffering more prolonged, Jts treatment more difficult, its results more disastrous to the general system ; and, finally, as being so constantly the fore-runner of acute gastritis. Chronic or sub-acute gastritis, or dyspepsia, is one of the most frequent and distressi...
متن کاملEffects of Casting Speed and Runner Angle on Macrosegregation of Aluminium-Copper Alloy.
Abstract During the solidification of binary metal alloys, chemical heterogeneities at product scale over a long distance range (1cm-1m) develop and this has detrimental effect on the resulting mechanical properties of cast products. Macrosegregation is of great concern to alloy manufacturers and end users as this problem persist. In this study, the use of process parameters namely casting spee...
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