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149 articles for “molds”
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Noise Sources, Exposure, health effects and Control in Iron & Steel Foundry
Abstract: Foundries are one of the oldest industries and the most basic of all metallurgical processes, with two main procedures performed in a foundry: molding and metal casting. Workers are exposed to a wide range of hazardous compounds in the workplace due to the variety of materials and procedures performed in this industry, which can lead to chronic exposure to hazardous substances (physical and chemical). Noise is a major physical hazard …
Published in Journal of Industrial Safety Engineering · Vol. 8, Issue 2, 2021 · pp. 20–28 Read article
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Artificial Neural Network Based Defect Prediction in Casting
Abstract: The main problems which are facing by most of the casting industries is loss of productivity which is due to casting defects occurred during the production time. The main casting defects are cracks, misruns, blowholes scabs and airlocks. Most of the investigations made in this area is only discussing the defects occurred after a cast is made and no method has yet been developed to prevent the defects before casting. …
Published in Journal of Mechatronics and Automation · Vol. 2, Issue 2, 2015 · pp. 33–38 Read article
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Effect of Magnetic Field on Casting Parameters
Abstract: AbstractThe casting process is one of the oldest manufacturing methods involving squeezing / jolting the green sand used as moulding material, and further was developed with use of binders such as clay/organic resins. The constants search for newer moulding material lead to the magnetic mould involving steel shots and application of magnetic field. The preliminary trials on one of the process parameters i. e. Magnetic field was carried out and …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 3, 2018 · pp. 30–35 Read article
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Experimental Evaluation and Optimization of Dry Drilling Parameters of Stainless Steel Using Different Drill Bit
Abstract: Drilling is one of the widely used in machining processes for various purposes. Stainless steel is frequently used in automotive, aircraft and aerospace and dies or mold industries, home appliances, medical and electrical equipment, but machining of stainless steel is difficult due to high tensile strength, high ductility, low heat conductivity and high fracture toughness. The cutting temperature at drill tool-chip interface affects drill hole quality, lowers the tool life, …
Published in Journal of Materials & Metallurgical Engineering · Vol. 7, Issue 1, 2017 · pp. 43–48 Read article
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A Study of Improvement of Mechanical Properties of Aluminum by Conventional Casing and Deformation Process
Abstract: Nowadays, Aluminum-Zinc alloy system are the major and rapid development in the field of automotive and aerospace industries for growing demand of efficient vehicles and aircrafts to reduce energy consumption and air pollution. Aluminum is a very soft metal by nature. Different alloying elements were added in the past to increase its strength and toughness. Zinc is considered as a major alloying element in aluminum to increase its strength and …
Published in Journal of Materials & Metallurgical Engineering · Vol. 4, Issue 2, 2014 · pp. 16–20 Read article
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Preparation and Characterization of a Novel Lignocellulosic Fiber from Calotropis gigantea Stem Fiber for Thermoplastic Composites
Abstract: In the current article, Calotropis gigantea fiber mat (CGM)/thermoplastic polypropylene (PP) strengthened non-woven unidirectional composites were successfully manufactured by hot compression molding using the film piling method. Micromechanical and physicomechanical properties such as tensile, flexural, compressive, impact properties, thickness, swelling, and water absorption of CGM/PP composites were evaluated for the effects of CGF composition, mercerization of CGF as well as the inclusion of two types of coupling agents (vinyltriethoxysilane and …
Published in Journal of Materials & Metallurgical Engineering · Vol. 12, Issue 1, 2022 · pp. 15–33 Read article
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Surface Modified Abaca Fibers: Physico-Mechanical, Morphological and Degradation Properties Evaluation
Abstract: Lignocellulosic fibers are used as cost-cutting fillers in plastics factories. Amid several factors, the ultimate performance of composite ingredients depends on the bond between the matrix resin and the filler, and hence on the quality of the interface. To acquire optimal performance of the end product, adequate interaction between the matrix and the lignocellulosic ingredient is preferred. This is often acquired through surface modification of the matrix or filler. Abaca …
Published in Journal of Materials & Metallurgical Engineering · Vol. 12, Issue 2, 2022 · pp. 34–46 Read article
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Studies on Mechanical, Electrical and Thermal Properties of Compatibilized PLA/ABS Blends Reinforced with Wood Flour
Abstract: AbstractPoly lactic acid (PLA) bio-polymer (60%) was blended with acrylonitrile butadiene styrene (ABS) (40%) and filled with wood flour (0, 10, 20%) using a twin screw compounding extruder and a suitable compatibilizer i.e., glycerol, is also incorporated into that mixture at a percentage of 4% respectively. Test specimens were prepared by using an injection molding machine for mechanical, electrical and thermal properties as per ASTM standards and the properties were …
Published in Journal of Polymer & Composites · Vol. 3, Issue 3, 2015 · pp. 20–26 Read article
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Simulation and Experimental Studies on the Effect of Injection Moulding Parameters on Tensile Properties of ABS Thermoplastic Specimen
Abstract: AbstractThe injection moulding process is the most widely used method of manufacturing Engineering thermoplastics. Thermoplastic blends and composites are suitably replacing metals and ceramics in most circumstances. This trend is mainly due to the versatility and compatibility of the injection moulding process. However, the injection moulding conditions has a significant impact on the aesthetic and functional characteristics of the final product as the flow induces substantial variation in the properties …
Published in Journal of Polymer & Composites · Vol. 3, Issue 2, 2015 · pp. 1–10 Read article
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Fabrication and Characterization of Jute Fiber Reinforced PP-Clay-based Nanocomposites
Abstract: AbstractNanocomposite is a new concept in the field of plastic-based composites. Jute fabric (hessian cloth)-reinforced polypropylene (PP) composites with different nanoclays were prepared by compression molding. Jute fiber content in the composites was approximately 50%. Mechanical properties of PP-clay blend and PP-clay/jute fiber composites were characterized. It was found that 5% clay containing PP-clay/jute composites showed the best results. Tensile strength (TS), elongation at break (EB) and tensile modulus (TM) …
Published in Journal of Polymer & Composites · Vol. 2, Issue 1, 2023 · pp. 19–29 Read article
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Studies in Effect of Alumina Nanoparticles on the Properties of Unplasticized Polyvinylchloride (PVC)
Abstract: AbstractUnplasticized polyvinylchloride (PVC)/nano-alumina composites were prepared using high- speed mixer, two-roll mills and compression molding. In the composite, the concentration of nano-alumina was varied from 0 to 7 phr (parts per hundred). The prepared composites were characterized for mechanical, thermal, electrical, crystallinity and morphological properties. Optimal improvement in properties was obtained at 5 phr concentration of nano-alumina in the PVC matrix. Tensile strength, tensile modulus, flexural strength, flexural modulus and …
Published in Journal of Polymer & Composites · Vol. 1, Issue 2, 2013 · pp. 27–34 Read article
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Preparation and Characterization of Composites Based on Polylactide and Herbs with Anti-Bacterial Properties
Abstract: Poly (lactic acid) is a polymer with increased interest in manufacturing a containers for different kinds of food. But the food stored in those containers comes with certain amount of bacteria and/ or molds. This suggest that the food can have shorter shelf life. That why is needed a container in which the food can maintain for longer period. In this paper were studied the properties of composite materials based …
Published in Journal of Polymer & Composites · Vol. 11, Issue 1, 2023 · pp. 10–19 Read article
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Optimization of process parameters in pocket milling of SAE304 based on tool path strategies using Taguchi method
Abstract: Surface roughness is the most significant factor in manufacturing industry to accept most of the machined components. In modern manufacturing CNC milling is one of the most commonly used machining process for different components. Pocket milling is building importance in plastic molding, Ship building and aircraft manufacturing. The surface finish is attained by finishing operations in most of the cases, which causes increase in production cost and time. This can …
Published in Journal of Production Research & Management · Vol. 8, Issue 3, 2018 · pp. 49–56 Read article
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Conversion of Textile Waste Yarns to Candle Product by Designing Simple Candle Producing Machine
Abstract: During the production of yarn in textile industry, there is high waste generation due to different reasons. These wastes are used for the production of candle and tapper product. In order to be competitive with companies performing similar operation, it requires changing this waste into some product. Since there is no other sector, which produces candle from waste yarn in Ethiopia, and candles are currently imported, which increases the product …
Published in Journal of Production Research & Management · Vol. 9, Issue 3, 2019 · pp. 9–14 Read article
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Enviro-energy Efficiency in Building Walls – Construction through Operation
Abstract: The recent boom in building construction activity calls for a stupendous availability of energy to manage maintenance of temperature, and embodied energy of materials for construction. This work makes a case for cautious planning to reduce energy misuse in both construction and good counsel in maintenance thereof. Various issues and options for energy-friendly infrastructure have been outlined. Arguing that the use of insulation is not effective, use of hollow bricks …
Published in Journal of Production Research & Management · Vol. 4, Issue 1, 2014 · pp. 1–12 Read article
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Development of Overall Process Effectiveness for Continuous Flow Line in a Semiautomated Manufacturing System
Abstract: This paper presents Overall Process Effectiveness (OPE), a performance measurement approach in a manufacturing system. OPE evaluates the process parameters of continuous flow production that affect the performance and reliability of the process. Based on the overall equipment effectiveness (OEE) concept, OPE focuses on the evaluation of production processes that involve human and machines. The developed OPE is validated through a case study ininjection molding (IM) industry. OPE plays a …
Published in Journal of Production Research & Management · Vol. 4, Issue 2, 2014 · pp. 43–53 Read article
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An Experimental Study on Replacement of Coarse Aggregate by Recycled Waste for High Grade Concrete: A Review.
Abstract: Concrete is extensively used man-made material in the world. Solid waste management is one of the major environmental concerns globally. The development of new construction materials using recycled waste is important for the construction industries. The present study concerns the use of recycled waste as replacement of coarse aggregates, fine aggregates and cement in concrete. This is to find out the change in mechanical properties of concrete with the substitution …
Published in Journal of Structural Engineering and Management · Vol. 7, Issue 2, 2020 · pp. 1–10 Read article
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Fabrication and Surface Modified Non-woven Calotropis gigantea Fiber Mat Reinforced Polypropylene Composites by Film Stacking Method
Abstract: Nowadays, there is a growing environmental consciousness and awareness about the need for sustainable development, which has led to growing interest in using natural fibers as reinforcement in polymer composites for synthetic fiber substitution. The current work deals with the effects of Calotropis gigantea fiber (CGF) content and chemical modification of CGF mats by treatment with sodium dodecyl sulfate (SDS) and SDS-pretreated benzoyl chloride on the fundamental properties of CGF-filled …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 9, Issue 1, 2022 · pp. 10–22 Read article
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Influences of Surface Modification of Vetiver Fiber Reinforced Polypropylene Composites
Abstract: Plant-drive vetiver fiber (VF), a significant lignocellulosic fiber, can be included in polymers like polypropylene (PP) in dissimilar ways for attaining preferred features and structure. But its high levels of moisture absorption, poor wettability and inadequate adherence between the fiber and polymer matrix result in debonding with age. To develop the overhead attributes,adequate surface modifications are essential. In our current work, the VF surface was modified by mercerized treatment (MVF), …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 2, 2023 · pp. 30–44 Read article
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Paper Waste for Bricks Production Evaluation of Paper Waste as An Alternative Aggregate in Bricks Production
Abstract: This study focused on the use of paper waste to partially replace ordinary Portland cement for producing a new lightweight concrete, otherwise called papercrete. The objective was to evaluate its effect on some hardened properties of papercrete. A laboratory experiment was conducted where paper waste was added in varying proportions of 20%, 30% and 40% as partial replacement for cement. After combining with sand, cement and water, the mixture was …
Published in Recent Trends in Civil Engineering & Technology · Vol. 12, Issue 1, 2022 · pp. 29–39 Read article