SU1671461A1 - Head for radial pressing pipe forming machine - Google Patents

Abstract

The invention relates to the manufacture of precast concrete and reinforced concrete products and improves the reliability and quality of the products. This is achieved by the fact that the head to the radial extrusion pipe molding machine is provided with an additional antiphase mounted above the main press roller, the distributor disk and the separating discs and the separating diaphragms. The cylindrical skirt is made up of a composite of the upper guide and the lower smoothing sections. The distribution disc is mounted on a vertically movable drive shaft above the additional pressing roller. The separating diaphragms are located between the last and main press roller and above the upper section of the skirt. 1 il.

Description

This invention relates to the manufacture of precast concrete and reinforced concrete products.

The aim of the invention is to improve the reliability and quality of the product.

The drawing shows schematically a head for a radial extrusion pipe-molding machine, a section

The head of the radial extrusion pipe molding machine consists of a vertically movable shaft 1 with a stationary casing 2 At the lower end of the shaft 1 is rigidly clamped between two sleeves with shoulder 3 and 4 a smooth sleeve 5 with key 6. The sleeve sleeves 3 and 4 clamp the package formed by the distribution disc 7, an additional pressing roller 8. a separating diaphragm 9, a main pressing roller 10. a separating diaphragm 11, a guide 12 and a smoothing 13 skirt section. An additional 8 and 10 main pressing rollers are installed eccentrically in 5, with eccentricities e located on opposite sides of the axis of the shaft 1

The head to the pipe forming machine of radial pressing works as follows.

Before the start of forming, mold 1 is lowered inside the form 14, the drive is turned, and the concrete is fed to the distribution disk 7. Under the action of centrifugal forces, the concrete mixture is thrown onto the edge of the distribution disk 7 and enters the gap between the main 10 and additional 8 pressing rollers and the form 14 .

The pressing rollers sequentially roll in and compact the concrete mix. When the shaft 1 is raised, an additional 8 and the main pressing rollers continue to roll in and compact the concrete mix. The guide section 12 calibrates the inner surface of the product, and the smoothing section 13 smoothes the internal

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the surface of the product, reducing its roughness, since the additional 8 and main 10 pressing rollers are installed on opposite sides of the axis of the shaft 1, the bending moments from the forces resulting from the compaction of the concrete mix are not transmitted to the shaft 1. During rolling and compaction, the pressing rollers make a plane-parallel movement, and the centers of the rollers rotate in a circle, the diameter of which is equal to twice the eccentricity e of the rollers. When the concrete mix enters the gap between the rotating distributor disk 7 and the additional pressing roller 8, the concrete mix falls into the holes 15 made in it and falls onto the separating diaphragm 9, which throws the mixture to the periphery under the main pressing roller 10. Similarly, the separating diaphragm 11. Thus, the presence of reflective diaphragms prevents the mixture from getting into the bearings of the pressing rollers and the bearings of the skirt guide section 12.

Claims (1)

Invention Formula A head to a radial extrusion pipe molding machine comprising a cylindrical skirt mounted on the lower end of a vertically movable drive shaft with an eccentric pressing roller mounted on it by means of a vertical axis, which, in order to increase the reliability and quality of the products, is equipped with an additional distribution roller mounted in antiphase above the main pressing roller the disc and the separating diaphragms, the cylindrical skirt is made of a composite of the upper guide and lower smoothing sections, with the distribution disc mounted on a vertically movable drive shaft above the additional pressing roller, the separating diaphragms between the last and main pressing roller and above the upper guide section of the skirt.