RU65811U1 - VOID FORMER - Google Patents

Abstract

The utility model relates to the building materials industry, in particular to hollow forming devices for the production of building products by pressing. The purpose of the utility model is to provide high-hollow up to 70% effective bricks with low thermal conductivity by pressing from clay with a moisture content of 5-13%, which is equally dense over the entire cross section of the product, the formation of stiffeners on the brick bed at the exit of the core with the preservation of relatively high strength properties of the baked brick.

The essence of the utility model is that

- hollow core, containing a core made of elastic material, a pressing plate while the pressing plate is made of metal with entering into the molded product.

- the core contains several cores of elastic material made with a pressing metal plate with a call into the molded product

Description

The utility model relates to the building materials industry, in particular to hollow forming devices for the production of building products by pressing.

A device is known for the manufacture of hollow bricks using rubber cores, for fastening which on the plate of the punch, metal pins are pressed into the rubber during vulcanization and welded to the plate; the front plane of the punch to prevent clay sticking is covered with a rubberized gum layer (“Brick Production by the Method of Semi-Dry Pressing”, M. G. Lundin, P. I. Berenstein, G. S. Blokh, M .: GOSSTROYIZDAT, 1958, 93-95 )

The closest technical solution is a hollow core, containing a pressing plate made of elastic material and cone-shaped cores with a slope of their side surface equal to 1 / 7-1 / 5, with each core made with an additional conical section, the slope of the side surface of which is 1/25 -1/20 (SU 876433, B28B 3/26).

A disadvantage of the known device is the impossibility of obtaining products of high voidness while maintaining strength indicators, the formation of stiffeners on a brick bed at the exit of the void former, there is also a non-flatness of the surface of the molded products when using a pressing plate of elastic material.

The objective of the utility model is to provide a high-hollow up to 70% effective brick with low heat conductivity by pressing from clay with a moisture content of 5-13%, which is equally dense over the entire cross section of the product, the formation of stiffeners on the brick bed at the exit of the core with the preservation of relatively high strength properties of the baked brick.

The essence of the utility model is that

- hollow core, containing a core made of elastic material, a pressing plate while the pressing plate is made of metal with entering into the molded product.

- the core contains several cores of elastic material made with a pressing metal plate with a call into the molded product.

The fastening of a core made of an elastic material to a metal plate can be mechanical, adhesive, and

also mechanically by means of a metal plate inside the core.

The essence of the utility model is illustrated by the drawing, in which Fig. 1 shows a hollow former containing a pressing metal plate with a call into the molded product and a core of elastic material; figure 2 - ceramic brick, box-shaped obtained by molding the proposed hollow core by pressing clay from a moisture content of 5-13%.

The core 1 contains a pressing metal plate 2 with a call into the molded product and a core of elastic material 3.

The hollow core works as follows.

In the process, the core 1 is lowered and the core 3, made of an elastic material, penetrates the press powder. With further application of force to it, an increase in the volume of core 3 occurs due to a change in its shape from wedge-shaped to round. Due to this, the compression of the press powder occurs uniformly in all directions. During the reverse stroke of the core former 1, the core volume 3 decreases, and it freely leaves the molded cavity, which, through the use of a metal plate 2 with a call into the molded product, allows stiffeners to be formed on the bed

brick at the exit of the hollow core. Due to the preheating of the core former 1, no adherence of clay to the surface of the metal plate occurs.

The proposed device provides a uniform distribution of compressive forces in all directions, and by increasing the volume of the tip 3 and changing its shape, the formation of the maximum possible voidness occurs. The implementation of the metal plate with the entry into the molded product allows you to form stiffeners on the bed of brick at the exit of the void former and thereby obtain relatively high strength properties of the fired brick.

The technical result is achieved, which is confirmed by the test results, which were carried out on the existing technological line for the production of semi-dry pressed ceramic bricks at a factory in the village of Chaltyr, Rostov Region. As raw materials, loam with a moisture content of 5–13% of the Sukhoi-Chaltyr deposit was used. The manufacture of products was carried out taking into account the properties of this raw material and the necessary technological parameters of production, which were obtained during laboratory tests.

The test results are shown in table 1 and table 2.

Table 1
Physical and mechanical characteristics of products Clay moisture,% Strength of raw brick, MPa The strength of burnt bricks, MPa 2-5 1-2 50-75 5-13 3-6 125-175 13-18 The mass is not suitable for molding -

Claims (2)

1. A core former containing a core made of an elastic material, a pressing plate, characterized in that the pressing plate is made of metal with entering into the molded product. 2. The pore former according to claim 1, characterized in that it contains several cores made with a pressing metal plate with a call into the molded product.