RU2047485C1 - Device for making tubular articles - Google Patents

Abstract

FIELD: manufacture of building materials. SUBSTANCE: pressing member is made with a perforation on the working area and with a building on the free end forming the ring-shaped cavity with a core. EFFECT: enhanced efficiency of making reinforced-concrete pipes, encased pipes and other articles. 2 dwg

Description

 The invention relates to the production of tubular products from concrete mixtures and can be used for the manufacture of reinforced concrete pipes, piles, shells and other products.

 A device for the manufacture of tubular products, containing installed in an external form, the core covered by the pressing body in the form of a glass and a vibration exciter.

 The disadvantages of the known devices are low productivity and high energy consumption.

 The purpose of the invention is to increase productivity and reduce energy consumption.

 This goal is achieved by the fact that the pressing body is made with perforation on the working surface and thickening at the free end, forming an annular cavity with a core.

 In FIG. 1 schematically shows the proposed device at the stage of completion of the molding of a tubular product, a cross section; in FIG. 2 the same at the time of molding.

 The device comprises an outer mold 1 mounted and secured to a pallet 2, a cylindrical core 3, a tubular pressing member 4 mounted coaxially with respect to the core 3 and forming an annular cavity 5 with it, a thrust ring 6, which is removably fixed to the mold 1, and a window 7 for the passage of the vibrating stamp 4. In addition, to remove excess moisture, air or vapor-air mixture from the concrete mixture, the pressing body 4 can be made with perforation (not shown).

 The device operates as follows.

 Concrete mixture is fed into a mold 1 with a core 3 installed and fixed to a pallet 2, and the supply of hard mixtures is carried out under vibration, for example, using mounted vibrators (not shown) or using a vibrating core. In addition, the primary seal can be performed using a pressing body by, for example, removing it from the mold as it is filled with the mixture. After the mold is loaded with concrete mixture, a thrust ring 6 is installed with its fixation to mold 1 with the subsequent introduction through the window 7 of the pressing member 4, which, under the influence of vibration and its own weight, is immersed in the concrete mixture, forcing it out and radially pressing it in a confined space while removing excess steam-air mixture into the cavity 5. After reaching the pressing body 4 of the lower position, it is removed, the core 3 is removed and the product is subjected to heat treatment. The molding process, using the proposed device, can be carried out in a horizontal position by supplying the pressing body with an additional drive, and form 1 loading device (not shown).

 The proposed device allows for the use of hard and even very hard concrete mixtures, which allows for the immediate removal of the formwork at the end of the molding process and thereby reduce the process intensity. Considering that in the concrete layer that is in contact with the pressing organ, the latter is in a plastic-viscous state, and also taking into account the insignificant transverse area of the pressing organ, the proposed device provides significant pressing pressure with little force, and the pressing process itself is less lengthy.

Claims (1)

 DEVICE FOR MANUFACTURE OF TUBULAR ITEMS, containing an outer core installed, seized by a pressing body in the form of a glass, and a vibration exciter, characterized in that, in order to increase productivity and reduce energy consumption, the pressing body is made with perforation on the working surface and thickening at the free end, forming an annular cavity with a core.

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