RU1816264C - Machine for molding concrete structures - Google Patents

Abstract

The invention relates to devices for the continuous molding of concrete and reinforced concrete products, and provides "improved productivity and quality of products. This is achieved by the fact that each pore former 22 is provided with a central roller 30, balls 33 in contact with it, a conical nozzle 26, mounted on the roller 30 from the side of the balls opposite the drive, on the other side of which there is a feed screw 34 located on the pore former. The casing 24 is made with windows for balls arranged along a helical line in rows along the longitudinal axis of the hollow core. The lid is pivotally coupled to the frame and spring loaded relative to it from the side of the hopper. 4 ill.

Description

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The invention relates to devices for the continuous molding of concrete and reinforced concrete products.

The purpose of the invention is to increase the productivity and quality of products.

In FIG. 1 shows a General view of the installation, a longitudinal section; FIG. 2 is a section AA of FIG. 1: in FIG. 3 is a section BB of FIG. 2; FIG. 4 is a section BB of FIG. 1.

The installation consists of a movable frame 1 with wheels 2, which is mounted on the base 3 and on which the hopper 4 is mounted, drives 5 with an electric motor 6 and a gearbox 7, power cylinders 8 connected by rods 9 to the punches 10.

In the rear part of the frame there is a formwork cover 11, which is pivotally attached to the frame 1 by an axis 12 and an arm 13. The front part of the cover 11 is connected to the frame 1 by means of springs 14 and bots 15.

The side walls 16 of the formwork are fixed on the frame 1 using axles 17, brackets 18, springs 19 and bolts 20. A U-shaped profile nozzle 21 is attached to the side walls 16 and the cover 11, fixed. flax on the frame 1..

Hollow formers 22 are mounted on the frame 1, each of which consists of a support 23, a housing 24 with a shaft 25 and a conical nozzle 26 on the housing 24 and a non-rotating cylinder 27. The shaft 25 is mounted in the support 23 on bearings 28.

An asterisk 29 is installed at the end of shaft 25. Inside the housing 24, a central roller 30 is placed on bearings 31 along its axis. On the outer surface of the housing there are windows 32 for accommodating balls 33 located along a helical line along the longitudinal axis of the core 22, In the cross section of the housing 24 there are balls 33 are arranged in longitudinal rows uniformly distributed around the circumference. In the front of the housing 24 are installed turns of the screw 34, which continue the helix of the balls 33; in contact with the Central roller 30. The cylinder 27 has a sleeve 35, which is freely seated on the axis 36, mounted in the housing 24. The sprockets 29 are connected by chains 37 to the corresponding sprockets 38 of the gearbox 7.

The rotation of two adjacent pore formers should be carried out in the opposite directions. The direction of the helical lines of the balls 33 and the turns of the screws 34 should be left and right, respectively. The diameter of the cylinder described around the balls 33 and turns of the screw 34 is equal to the diameter of the cylinder 27,

Installation works as follows.

The concrete mixture from the hopper 4 enters the turns of the screws 34, which feed it into

the molding chamber formed by the side walls 16 and the cover 11. Further advancement of the concrete mixture in the molding chamber is carried out by periodic movements of the punches 10 from

power cylinders 8. During rotation of the bodies 24 of the void formers 22, a series of balls 33 exert pulsating pressure on the concrete mixture. Lateral pressure is perceived by the side walls 16, and the vertical pressure by the base 3 and the cover 11. When the pressure of the balls 33 decreases, the side walls 16 and the cover 11 under the pressure of the springs 14 and 19 exert a pulsating pressure of the opposite sign on the concrete mixture.

The joint work of the punches 10, the side walls 16, the cover 11 and the balls 33 creates shear deformations in the concrete mix in different directions with different frequencies, which leads to its effective compaction. The magnitude of these strains towards the exit of the article from the molding chamber in the region of the profile nozzle 21 is reduced to 0.

Reactive force generated by the pressure of the punches 10, balls 33 and turns of the screw

34 onto the concrete mixture, moves the frame 1 in the direction of arrow D. When the casing 24 rotates, the balls 33 rotate in the opposite direction due to their pressure on each other through the central roller 30.

Claims (1)

Thus, the balls 33 run around the cylindrical surface of the voids of the product. SUMMARY OF THE INVENTION A concrete molding apparatus comprising a movable frame, a concrete hopper mounted on it, feeding augers, pivoting side walls of the formwork, a lid and hollow tumblers with a drive for rotating them, so that, in order to increase the productivity and quality of the product, each hollow core is equipped with a central roller, balls in contact with it, a conical nozzle mounted on the body from the side of the balls a hollow core opposite to the drive, on the other side of which there is a feed screw located on a hollow core, the housing of which is made with windows for balls arranged along a helical line in rows along the longitudinal axis of the core, while the lid is pivotally connected to the frame and spring-loaded relative to it from the side of the hopper. $ sh.