Determination of Rational Technological Parameters of Co-Extrusion Processing of Secondary Polymeric Materials by the Method of Physical Modeling

Svinoroev²,

2021

SSP

The paper considers the possibility of using unified dry mixes for machine-building enterprises with small-scale and single-piece production of castings. Dry mixes for production of expendable molds and rods have been developed. Their distinctive feature is that cladded CMC high-silica sand is used as a filler, and powder-like LST are used as a binder. All the ingredients of the mix are products of domestic and Russian production, are not scarce, are not expensive in price, are simple and safe to use. Experimental-industrial tests of the proposed dry mixes were carried out, and a pilot batch of castings was produced in the amount of 5 tons of good casting (small shaped cast-iron casting). Taking into account the specificity of the foundries at enterprises with single-piece and small-scale production, the features of their technical equipment, an engineering solution, focused directly on this segment, has been developed and proposed. The engineering solution relates to the manufacturing processes of casting molds and rods production, and consists in the development of formulations for dry foundry mixes. A distinctive feature of the formulations is: simplicity in use, versatility in functionality, reliance on the domestic resource base, which means that it is affordable, not expensive, and environmentally friendly, safe both for production personnel and for the environment, in the area where the industrial enterprise is located.

Section: Resultsmentioning

confidence: 99%

Dry Mixes for Casting Manufacturing in Single and Small-Scale Production

Svinoroev²,

2021

SSP

“…These include developments relating the use of lignincontaining binders, such as technical lignosulfonates (LST). Such technical solutions are described in scientific articles [16,17], in case of existence of appropriate technological equipment described, for example, in [18], it would be possible to create a process similar to Cold-Box-Amin. In this regard, it is reasonable to conduct the adaptive search experiments to determine the principal possibility or impossibility of such technical solutions.…”

Section: Relevancementioning

confidence: 99%

The Research of the Possibilities of Using Purge Methods for the Manufacture of Casting Cores from Mixtures Based on Secondary Polymers and Technical Lignosulphonates

Svinoroev¹,

Ternovskiy³

2020

SSP

The work investigated the possibility of using the technical lingo-sulfonate as a binder for the manufacture of small cores by blow-off methods in the production of shaped cast-iron casting, similar to the dominant at the present time Cold-Box-Amin process. It is shown that the advantage of lignin materials is their safety, manifested both in the workplace - directly in the foundry, and in ensuring environmental cleanliness in the area of the location of such production. It is indicated that, when switching to the proposed lignin materials, the price of binders can be reduced by two orders of magnitude. Experimental compositions of mixtures are proposed, and their tests are carried out. The quantitative characteristics of the composition of the sand-oligo-sulfonate mixture are established. As a result, a pilot batch of rods was produced, and high-quality shaped cast iron castings were made. Special attention is paid to the demand to develop the specialized equipment, focused on lignin binders.

Optimization method of the extrusion mixture components formulation and consumption in the processing of the secondary heterogeneous polymeric materials

Колесников

IOP Conf. Ser.: Mater. Sci. Eng.

et al. 2020

The paper scrutinizes the main methods, applied practically, for correcting the consumption of the components considering their fullness in the technological extrusion process. The method, chosen as the basic one, includes the following: the common fullness of the components, getting into the mixer, is subtracted from the common consumption of the filler. A mathematical model for determining the values of the components for setting the dosing devices is designed. For the operational control of the filler’s components content we determined the dependencies of these values correction on the period of the filler content evaluation and transport delay of the components supply. The algorithm of the method for controlling the extrusion mixture components’ consumption, considering the content of the filler in it, is made.