This study investigates the development of a rapid wax injection tooling with enhanced heat dissipation performance using aluminum-filled epoxy resin molds and cooling channel roughening technology. Experimental evaluations were conducted on cooling channels with eleven surface roughness variations, revealing that a maximum roughness of 71.9 µm achieved an 81.48% improvement in cooling efficiency compared to smooth channels. The optimal coolant discharge rate was determined to be 2 L/min. The heat dissipation time for wax patterns was significantly reduced, enabling a cooling time reduction of approximately 12 s per product. For a production scale of 100,000 units, this equates to a time savings of about 13 days. Empirical equations were established for estimating heat dissipation time and pressure drop, with a high coefficient of determination. This research provides a valuable contribution to the mold and dies manufacturing industry, offering practical solutions for sustainable and efficient production processes.
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http://dx.doi.org/10.3390/mi16020225 | DOI Listing |
J Basic Microbiol
March 2025
School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou, China.
Mahonia eurybracteata exhibits characteristics related to heat dissipation, nutritional supplementation, and possesses antimicrobial and anticancer properties. Despite its widespread cultivation through artificial means, the detrimental impact of anthracnose on its growth has led to extensive reliance on chemical pesticides for disease control. Unscientific pesticide application and the use of outdated spraying techniques contribute to the presence of pesticide residues in both plants and the environment, thereby posing potential risks.
View Article and Find Full Text PDFSci Rep
March 2025
Institute of Fluid Dynamics and Thermodynamics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, Prague, 166 07, Czech Republic.
Efficient heat dissipation is crucial for various industrial and technological applications, ensuring system reliability and performance. Advanced thermal management systems rely on materials with superior thermal conductivity and stability for effective heat transfer. This study investigates the thermal conductivity, viscosity, and stability of hybrid AlO-CuO nanoparticles dispersed in Therminol 55, a medium-temperature heat transfer fluid.
View Article and Find Full Text PDFSci Signal
March 2025
National & Local Joint Engineering Research Center of High-Throughput Drug Screening Technology, Hubei University, Wuhan, China.
Brown and beige adipocytes dissipate energy to generate heat through uncoupled respiration, and the hormone norepinephrine plays an important role in stimulating brown fat thermogenesis and beige adipocyte development in white adipose depots. Increasing energy expenditure by promoting the function and development of brown and beige fat is a potential approach to treat obesity and diabetes. Here, we investigated the effects of macrophage sirtuin 6 (SIRT6) on the regulation of the norepinephrine content of brown adipose tissue (BAT) and on obesity in mice.
View Article and Find Full Text PDFNat Commun
March 2025
School of Materials and Chemistry, Anhui Provincial Engineering Center for High-Performance Biobased Nylons, Anhui Engineering Research Center for Highly Functional Fiber Products for Automobiles, Anhui Agricultural University, Hefei, Anhui Province, 230036, China.
Lightweight, nanoporous aerogel fibers are crucial for personal thermal management and specialized heat protection. However, wet-spinning methods, exemplified by aramid aerogels, inevitably form a dense outer layer, significantly reducing the volume fraction of efficient thermal barrier nanovoids and limiting the development of ultimate thermal resistance in fibers. Herein, we develop a microfluidic spinning method to prepare gradient all-nanostructure aramid aerogel fibers (GAFs).
View Article and Find Full Text PDFJ Chem Phys
March 2025
Freie Universität Berlin, Fachbereich Mathematik und Informatik, Arnimallee 6, 14195 Berlin, Germany.
Non-equilibrium molecular dynamics (NEMD) simulations of fluid flow have highlighted the peculiarities of nanoscale flows compared to classical fluid mechanics; in particular, boundary conditions can deviate from the no-slip behavior at macroscopic scales. For fluid flow in slit-shaped nanopores, we demonstrate that surface morphology provides an efficient control on the slip length, which approaches zero when matching the molecular structures of the pore wall and the fluid. Using boundary-driven, energy-conserving NEMD simulations with a pump-like driving mechanism, we examine two types of pore walls-mimicking a crystalline and an amorphous material-that exhibit markedly different surface resistances to flow.
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