Tyutyukov S.A., Andreev A.V., Gavrilyuk A.V., Belozertsev M.V., Bilalov E.H., Baykova N.A. About of the technology’s stability in the process of making gravity-die casting from hypoeutectic silumi
The technological aspects for growing of stability in the process of making gravity-die casting from hypoeutectic silumin (hypoeutectic alloy aluminium – silicon (7%) – magnesium (0,3%) are discussed in this article. Mechanical properties of alloys from experimental smeltings corresponded to requirements state standard 1583-93. The purpose of the present paper also is to analyze results of the modernization of method for determination of core sand mixture’s moisture in the plant’s laboratory: time arriage analysis after modernization diminish in 3 time, expenditure of electric energy was 6 time less.
Key word: Aluminium, silicon, manganese, silumin, gravity-die casting (or metallic mold), technology’s stability, moisture of the materials, equipment for determination of core sand mixture’s moisture.
Voronin Y.F. Examples of identifying and eliminating casting defects
The article is directed at improving foundry technologist skills in quick identification of casting defects, revealing causes of their origin, and methods of elimination. The article discusses in detail oxidized gas blowholes of enlarged (>15 mm) and medium (<15 mm) size, as well as knot-like blowholes from 0.2 to 2 mm. All of the castings presented were examined by the author at foundries where characteristic visual and logical peculiarities of defects had been determined, their formation stages and elimination methods had been composed. Elimination techniques for each typical casting are described in detail.
Key word: Mold, core, venting system, molding quality, knot-like blowholes.
Mukhomorov I.A. Tear formation in castings
The article addresses practical experience in analyzing causes of tear formation and methods of their elimination.
Key word: Cold tears, hot tears, chill-caused tears, tears caused by internal stresses, shrinkage hole, gating system
Morozov V.A. Containers for expanded pattern casting
Basic principles of choosing vacuum filters layout in containers in expanded pattern casting process, design features of two- and three-contour containers for steel castings are set forth.
Key word: Expanded pattern casting, containers, design, layout, vacuum, gas blowing, steel castings.
Malyarov A.I., Balanchuk Y.B., Burlakova M.G. Making art castings with closed cavity by rotating a mold relative to two axes
The design of the plant to produce art products with a closed cavity is shown. Installation is driven by a motor, a worm gear and a belt transmission, providing the rotation process vessel about a vertical axis and horizontal axis with a frequency of 1/3 revolutions per second, and the rotation mechanism of the entire system by the angle +/- 90 degrees. Are photos of the casting obtained by setting.
Key word: Castings with closed cavity, mold rotation method, methods of accelerating casting solidification, unit inclination.
Verbitsky V.I. Depreciated shakers and vibro-impact tables, performance and efficiency
Is a typical design shakers to counter punch and vibro-table and a comparative study of the characteristics of their work evaluated the effectiveness of various mechanisms of compaction of the moldable mixture. Advantages and disadvantages of the various circuits of the drive.
Key word: Shaker, vibration table, the work efficiency.
Table of content
Tyutyukov S.A., Andreev A.V., Gavrilyuk A.V., Belozertsev M.V., Bilalov E.H., Baykova N.A. About of the technology’s stability in the process of making gravity-die casting from hypoeutectic silumi
Voronin Y.F. Examples of identifying and eliminating casting defects
Mukhomorov I.A. Tear formation in castings
Proceedings of the 5th International scientific-technical conference “Promising technologies, materials and equipment in the foundry industry”
Batyshev A.I., Batyshev K.A. Casting steel in metal molds
Morozov V.A. Containers for expanded pattern casting
Malyarov A.I., Balanchuk Y.B., Burlakova M.G. Making art castings with closed cavity by rotating a mold relative to two axes
Budanov Y.N. Past, present and future of core making technologies by example of Laempe Company
Verbitsky V.I. Depreciated shakers and vibro-impact tables, performance and efficiency
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