A New Technology for Producing the Polystyrene Foam Molds Including Implants at Foundry Industry

Ponomarenko, Olga; Yevtushenko, Nataliіa; Lysenko, Tatiana; Solonenko, Liudmyla; Shynsky, Vladimir

doi:10.1007/978-3-030-22365-6_43

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…It is known that if the strength of mixtures in the raw state is very low -less than 0.01 MPa, it requires the use of additional special equipment-drivers, equipment necessary to move the manufactured product to the driver, subsequent transportation and heat treatment to obtain the required technological strength, which increases the cost of production as well as lengthening the technological cycle of manufacturing casting. The solution to this problem may be the application of a combined binder containing additional liquid glass or clay to the EPS solution [27][28][29][30].…”

Section: Re-using Of Eps Wastementioning

confidence: 99%

A Study of The Properties of Forming Mixtures Containing Polystyrene Wastes

Dan

Trofimova

2021

JCME

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Expanded polystyrene is widely used as a material for packaging, in modern construction as a heat and sound insulation layer, in thermal insulation systems for buildings, as well as tanks and pipelines. It is additionally used in foundry engineering for the production of models which are gasified during the production of castings from ferrous and non-ferrous alloys under the contact with liquid metal. The use of expanded polystyrene products is associated with waste generation, both in production and in consumption. About 40–50 kg/person of polystyrene waste is generated per year. The peculiarity of polymeric wastes is their resistance to aggressive environments. They do not rot and the destruction processes in natural conditions proceed rather slowly, with the formation of harmful substances that poison the environment. Therefore, the problem of the processing of waste from polymeric materials is of great importance, not only from the standpoint of environmental protection, but also due to the fact that in conditions of a shortage of polymer raw materials, this waste becomes a powerful raw material resource. This article describes the prospects for recycling expanded polystyrene wastes in foundry engineering. In this work, the properties of molding and core sands containing a combined binder, consisting of a solution of expanded polystyrene wastes in turpentine and clay were investigated, and their main characteristics (weight during stretching and crumbling) were determined. Molding and core mixtures, which contain only a binder in the form of a solution of expanded polystyrene in turpentine, have a crude strength of not more than 0.01 MPa. The introduction of a mixture of clay in the amount of 2–3% allows a crude strength of the mixture of up to 0.05 MPa to be obtained. After drying, the investigated mixtures containing a solution of expanded polystyrene wastes and clay have a tensile strength of up to 2.1 MPa. Mixtures into which a solution of polystyrene wastes and clay was introduced have an insignificant gas capacity and satisfactory gas permeability.

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Section: Re-using Of Eps Wastementioning

confidence: 99%

A Study of The Properties of Forming Mixtures Containing Polystyrene Wastes

Dan

Trofimova

2021

JCME

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“…Also, in some studies, different methods were used to prepare the analysis samples by which polystyrene was melted using acetone. In some studies, the adhesion resistance of melted PS to the surfaces of different materials was investigated (Maldas et al, 1988;Ponomarenko et al, 2020;Šernek et al, 2020;Sitorus et al, 2020;Sriprom et al, 2022;Osemeahon et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Production and Characterization of Wood Polystyrene Composite from Recycled Waste Materials

Köksal,

Kelleci

2024

DÜOD

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In this study, it was aimed to recycle waste polystyrene (PS) and obtain a material with high screw retention resistance that can be used instead of wood material. For this purpose, waste MDF dust (MF) and glass fiber (GF) were used as fillers in the PS matrix. Waste PS was first dissolved in gasoline and then 50-100-150 % fillers were added and mixed manually. To solidify the mixture, it was kept in the oven at 100 degrees for 30 minutes. Additionally, the samples were subjected to heat treatment by keeping them in the oven at 190 degrees for 30 minutes. Thus, the effect of heat treatment on the samples was also examined. The samples were kept in water for 2 hours and 24 hours and their thickness swelling (TS) and water absorption (WA) were determined. For mechanical characterization, the screw withdrawal resistances (SR) of the samples were analyzed. The results were analyzed using the SPSS package program. According to the obtained results, it was determined that there was no significant change in the amount of TS as the MF was increased, but the amount of WA has increased. It was determined that GF filling swelled less than MF. But WA was more than MF. Apart from the addition of 150 % GF, fillers increased the densities. SR resistance increased with the addition of filler. While heat treatment did not change the physical properties of the samples significantly, it increased the SR resistance. As a result, waste PS can be recycled into a material with high SR by adding waste MF and GF and can be used instead of wood material.

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“…Conventional foundry binders are responsible for up to 70% of a foundry's volatile organic compound emissions [15]. e source of unsatisfactory environmental situation is also the spread of sand-resin mixtures [16][17][18]. New binder technologies are essential for both foundries and the environment.…”

Section: Introductionmentioning

confidence: 99%

Structural Construction of Binders Based on Orthophosphoric Acid and Refractory Materials

Liutyi

Liuta

Petryk

2021

Advances in Materials Science and Engineering

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The formation of phosphate binders in systems based on orthophosphoric acid and the most common refractory fillers in foundry technology (quartz dust, zircon ZrSiO4, and kyanite-sillimanite Al2SiO5) has not been previously studied. The phase composition of these inorganic binders was studied, and the formation of silicon SiP2O7 and zirconium ZrP2O7 pyrophosphates was confirmed. The study by differential thermogravimetric analysis in the temperature range of 20–1000°С established the fact that the formed binders are thermally stable and do not emit harmful gaseous substances. The obtained results of the studied binders make it possible to develop new environment-friendly core mixtures of thermal hardening.

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A New Technology for Producing the Polystyrene Foam Molds Including Implants at Foundry Industry

Cited by 4 publications

References 8 publications

A Study of The Properties of Forming Mixtures Containing Polystyrene Wastes

A Study of The Properties of Forming Mixtures Containing Polystyrene Wastes

Production and Characterization of Wood Polystyrene Composite from Recycled Waste Materials

Structural Construction of Binders Based on Orthophosphoric Acid and Refractory Materials

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