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A computation-experimental study of the technological process of outer-die extrusion of large-size porcelain casings is performed. The extrusion of cylindrical tubular blanks from alumina paste is simulated mathematically. The paste is treated as non-Newtonian fluid in laminar flow along the shaping channel of a vacuumpress. Recommendations are made for an efficient configuration of the shaping system of the vacuum-press for manufacturing cylindrical tubular intermediate product.Porcelain casings manufactured from electrical porcelain are used to cover current-conducting parts of high-voltage equipment or for supporting components of equipment which are under voltage [1]. The reliability and life span of these devices is largely determined by the quality of the casings. Manufacturers of the high-voltage equipment impose stringent requirements on these casings.The casings which the Slavyansk High-Voltage Insulator Works OJSC manufactures from high-strength alumina porcelain (GOST 20419-83 subgroup 130) satisfy all of the stringent requirements for strength and reliability. An example of a casing which is manufactured from subgroup-130 electrical porcelain is shown in Fig. 1.Publications devoted to articles made of electrical porcelain are not appearing in the technical literature. The All-Russia Scientific -Research Institute of Electrical Ceramics no longer exists. Manufacturers of high-voltage insulting articles, who are now competitors in a market economy, do not exchange information with one another. Scientific studies of electrical porcelain are not being done, since the specialized departments of ceramics in Ukrainian institutions of higher learning are now geared toward the technology of ceramic dishware and have lost their experience in working with high-voltage insulation.However, the main growth trends in power engineering in Russia and Ukraine dictate their own requirements. Power companies are concluding that it is necessary to switch to high-voltage apparatus based on modern electric insulation materials of high reliability and strength, both electric and mechanical. The Slavyansk High-Voltage Insulator Works OJSC is responding rapidly to user demand and is continually improving casings by using modern information technology and mathematical simulation of the technological processes involved in the manufacture of ceramic articles.Various technological factors influence the quality of insulating materials: the chemical composition of the initial materials, the composition and technology used to produce the ceramic paste, the type of furnace equipment, and the

Математична модель технологічного процесу пластичного опресування силового вузла полімерного ізолятора В. І. Абрамов Анотація. Статтю присвячено розробці математичної моделі технологічного процесу пружнопластичного опресування металевого закінцьовувача полімерного ізолятора на склопластиковому стрижні. Запропоновано аналітичні співвідношення для визначення рівня тиску опресування з урахуванням різних критеріїв виникнення пластичного стану та моделей механічної поведінки матеріалів закінцьовувача. Ключові слова: полімерний ізолятор, опресування закінцьовувача, силовий вузол, тиск опресування.