SU776924A1 - Void for producing mounting holes in ferroconcrete sleepers - Google Patents

Description

The invention relates to the molding of products from materials containing substances, and may find application in construction in the manufacture of prefabricated and reinforced concrete products, including reinforced concrete sleepers.

- Known composite hollow core, comprising a housing, empty-forming elements, a mortgage washer, an installation bolt with nut 1.

The closest technical solution to the invention is a noose-forming device for forming mounting holes in reinforced concrete sleepers, consisting of a body, a mortgage washer, an insert and a fastening bolt connecting the core generator to form 2..

The disadvantage of such structures is the complexity of their manufacture.

The purpose of the invention is to simplify the design of the hollow core.

This goal is achieved by the fact that the core former contains a body, an inset washer, an insert and an extension bolt, the body being tapered and having an opening for installing an insert made of a low-melting material with a compressive strength of 2-5 kg / cm. In addition, the taper of the housing is 0.01-0.1.

On fng. 1 shows a core former without a figure head; in fig. 2 - the same, side view. The puncher contains it body 1,

5 fixed on the form 2 with the plate 3 and the elastic compensator 4, the insertion washer 5, the figure head 6. The hollow core is attached to the form 2 by means of a bolt 7. For better fixation of the figure head 6 serves a protrusion 8 on the case 1. Hole 9 in the case 1 for fixing the figure head 6 therein.

Pustotoobrazovatel works as follows.

15 To the factory for the manufacture of reinforced concrete sleepers, form 2 comes with a plate 3 fixed to it, a compensator 4, and a body of the low-current maker 1. The body of the first web-bearer is attached to the form

20 bolt 7 or other known method. Before the product is molded, a core washer 5 is put on the case 1, the position of which is fixed by the figure head 6, which is inserted into the special opening 9 in the case 1.

Along the perimeter of the hole 9, protrusions 8 (notches) are left to securely fix the figure head 6, which cuts into the body of the head 6 and protects it

30 from displacement in the process of forming the product.

After completion of the molding, the product is subjected to heat and moisture treatment, during which the void-forming agent remains in the body of the product. After the heat-moisture treatment, the product is unmolded on the turner. When the mold is turned upside down, the product falls out of the mold, dragging along with the mortgage washer 5, which, moving along the body of the emptying device 1 as a guide, breaks the figure head 8 into pieces, which are poured through the hole formed by the emptying element in the product.

Claims (2)

1. Pusting for making mounting holes in reinforced concrete A shnilah consisting of a body, an inset washer, an insert and a clamping bolt connecting the core-former with a mold, characterized in that, in order to alleviate the void-forming structure, its body is tapered and has an opening for installing an insert made of a low-melting material compressive strength 2-5 kg / cm. 2. A void former according to claim 1, characterized in that the taper of the housing is 0.01-0.1. Sources of information taken into account in the examination 1. USSR author's certificate No. 620378, cl. B 28 B 7/30, 1976. 2. USSR author's certificate number 417297, cl. B 28 B 7/30, 1972.