Vane Extruder “Lopex” as an Alternative to Screw Presses

A review of well-known screw presses for the ceramic industry has been carried out. The problem of delamination (strill formation) of molded products is indicated. The design of the unit for plastic molding of a strip bar, developed in 2021 by Inta-Stroy, consisting of a vane extruder and a mixer of the Cascade type as a mixing unit, is considered. The high quality of mixing has been established at the Cascade installations in comparison with single-shaft and double-shaft mixers. The elimination of sticking of raw materials in the vacuum chamber was confirmed due to the design improvement of the loading neck. An increase in the force of axial pressure due to the use of blades with a smaller “angle of attack” compared to the screw was revealed. The formation of streaks in the clay beam was eliminated due to the use of forming discs that prevent twisting of the material. It is noted that a denser raw brick is obtained, as well as the possibility of molding a raw brick from less plastic clays and at a lower moisture content of the raw material.

I.F. SHLEGEL¹, Candidate of Sciences (Engineering), director,
S.G. MAKAROV¹, engineer, head of department,
S.S. SHUL’GA¹, engineer, head of department,
S.N. SAPEL’NIKOV¹, engineer, deputy head of department;
L.A. BAGAEVA², director

¹ Institute of New Technologies and Automation of Building Materials Industry (OOO «INTA-STROY») (100, 1-ya Putevaya Street, 644113, Omsk, Russian Federation)
² Trading House “Inta-Stroy” (100, 1-ya Putevaya Street, 644113, Omsk, Russian Federation)

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