RU53213U1 - FILLER FOR MANUFACTURE OF EMPLOYEES - Google Patents

Abstract

A die for the manufacture of hollow articles is proposed, comprising a housing, hollow bodies - cores and supporting elements - staples. The brackets are made in the form of core shanks, equipped with calibrating heads and are installed directly in the grooves of the die body. The essence of the invention lies in the fact that this reduces the resistance to movement of the molding material, increases its uniformity and density throughout the volume of the product, prevents cracking during drying and firing, reduces power consumption.

Description

The proposed utility model relates to the building materials industry ”of the chemical industry and other technical fields, in particular to the technological equipment of press equipment, and is intended for the production of hollow products by plastic molding, such as, for example, bricks and blocks, filters and catalyst supports.

The process of molding plastics, for example, ceramic, in addition to the specific properties of the moldable mass, such as ductility, moisture, internal and external friction, is also characterized by design features of the void forming elements of the molding device. These features lie in the ideology of constructing the design of the forming device itself.

Such constructions are well known - mouthpieces containing a body with forming and calibrating zones and flat work surfaces. Inside the casing of the mouthpiece, in the forming zone, ribs - “brackets” are rigidly mounted on which core rods are mounted, equipped with hollow core formers.

The core holders are cantilevered on “brackets” and their length is determined by the specific dimensions of the “bracket”, the plasticity of the molding material and the construction of the mouthpiece body. The clay mass supplied under pressure from the press head to the entrance of the forming zone of the mouthpiece has a complex structure and pulsating nature of the movement, due to the design of the working body of the press - screw.

As a result of this, the core fixed at the end of the core holder cantilever mounted on the bracket makes oscillatory movements relative to the design position.

This main design defect leads to a change in the geometric and mechanical parameters of the product during molding, and the length of the flowing part of the mouthpiece requires considerable power to push the moldable mass.

These disadvantages are inherent in the designs described in the copyright certificates No. 1761487, No. 1787782, No. 1806931, as well as in the patents of the Russian Federation No. 2041063, No. 2035297.

A device according to A.S. No. 1263533, in which the core holder is attached directly to the shearing knife. But here too, the core installed on

the end of the cantilever reinforced core holder, also makes a migration relative to the design position.

Closest to the proposed solution is the design described in the certificate for utility model No. 15971. Here, the cores are reinforced at the intersections of the support strips - brackets connected to a spatial lattice. However, this solution increases the resistance to the passage of the moldable mass, makes it difficult to clean the die after the molding cycle is completed, and its manufacture is made more expensive. In addition, in all of these designs, the core includes a calibrating head and a prismatic (cylindrical) body - a shank, in which the faces are inclined at a large angle to the core axis.

This creates narrowing sections between adjacent cores, where the resistance to the movement of the molding mass sharply increases and its separation occurs.

The task to which the creation of the proposed utility model is aimed is to improve the quality of the resulting products and reduce the energy intensity of the molding process.

The technical result from the use of the proposed solution is to increase the uniformity and density of the molded material over the entire volume of the product, align the flow rates of the molding material through the calibration zone of the die by reducing the resistance to movement of the molding material, as well as obtaining products with stable design characteristics. This reduces stress in the material of the molded product, which prevents cracking during drying and firing.

The specified technical result is achieved due to the fact that the supporting element is a “bracket” made in the form of a core shank.

Figure 1 presents a cross section of a General view of the die with mounted support elements - brackets, figure 2 - bracket with gauge heads.

In the housing of the die 1 having a calibration zone 2 and a compression zone of the molding material 3 in the grooves 4 are installed support-forming elements - brackets 5, containing gauge heads 6 and shanks 7.

In the housing of the die 1 there are brake plates 8 that fix the brackets 5 in the axial direction. The proposed device operates as follows:

the molding material is fed by the press screw in the direction of arrow A through the press cylinder 9 into the die 1 into the brackets 5, which are caliber shanks.

Here, the molding material is cut, but with further movement along the shanks 7 is again connected under the action of pressure and tapering sections in zone 3.

With further movement, the compacted molding mass falls into the calibration zone 2 into the grooves formed by the calibrating heads 6. Given the extended compression zone and the small angle of inclination of the shank planes 7, the molding mass is stabilized by the flow velocity throughout the volume, and the compression value ensures the creation of continuity in the molded product at the exit of the die. This provides a reduction in stresses in the body of the product being excreted, reduces power consumption and prevents cracking during drying and firing of the product.

The described design solution to the utmost simplifies assembly - disassembling the die, a clear design position of the forming elements in the die body, and also cleaning after molding.

Claims (1)

A die for the manufacture of hollow core products, comprising a die body, hollow core bodies — cores, including calibrating heads and shanks, and supporting elements — brackets, characterized in that the brackets are made in the form of core shanks.