RU2795292C1 - Method for vulcanizing chevron belt - Google Patents

Abstract

FIELD: vulcanizing chevron belt.

SUBSTANCE: chevron belt vulcanization method, in which the initial configuration of the chevron pattern is formed, for which locations of the matrix elements are marked on the rubber belt, said places are degreased and a hot vulcanization solution is applied to them. In the cavity for laying rubber inside the matrix elements, raw rubber is laid, the matrix elements are placed at specified intervals according to the planned locations of the chevrons on the rubber belt, the matrix is placed on top of the lower part of the press, pressure is applied to the matrix with heating by means of the upper part of the press, forming a chevron pattern in the area of the rubber belt on which matrix elements are placed. After that, the above actions are repeated for the next section of the rubber belt, while changing the configuration of the chevron pattern, for which new locations of the matrix elements are marked and the configuration of the matrix elements corresponding to them is formed, obtaining a non-periodic chevron pattern on the rubber belt. At the same time, during formation of a chevron pattern on a section of the rubber belt, the matrix is affected by a pressure of 0.1 to 10 atm at a temperature of 150 to 180°C for 20 to 60 minutes.

EFFECT: expansion of technological capabilities for manufacturing of chevron belts, as well as an increase in the number of options for chevron patterns when using a limited number of template elements.

2 cl, 4 dwg

Description

The invention relates to belt transport devices, namely to conveyor belts, and can be used for the manufacture of chevron conveyor belts [B29D 29/06, B29C 43/00, B29C 59/00, B29D 30/68].

The prior art manufacturing method implemented in the CONVEYOR BELT [RU91932, publ. 03/10/2010] containing a frame in the form of layers of rubberized fabric and a lining with a reinforced outer layer, characterized in that the fabric of the frame layers is at least partially made of threads obtained from basalt fiber, and the outer layer of the linings is reinforced with basalt materials. The problem to be solved by the utility model is to create a relatively inexpensive and durable tape, and the technical result that can be achieved when using it is to reduce the extensibility of the tape while ensuring its strength, as well as to increase its heat resistance and incombustibility.

Also known is a METHOD FOR MANUFACTURING TIRES OF PNEUMATIC TIRES [RU2014235, publ. 10/22/1991], during which the frame bracelet is assembled on the assembly drum, the bead rings are installed and the edges of the bracelet are turned on the bead rings with chambers, a breaker-tread bracelet is applied, the tire is molded without removing the fixation of the bead rings by the chambers, and after the molding is completed, the fixation of the tire is removed and pass it on for vulcanization, characterized in that after molding is completed on the assembly drum, the tread pattern is pre-cut, and the final design of the tread pattern is carried out in a vulcanization mold with an equatorial connector having a tread pattern. The objective of the invention is to expand the technological capabilities of the assembly and vulcanization equipment.

A common disadvantage of analogues is the inability to combine the chevron pattern of the tape, making chevrons using different configurations of the same template elements of the matrix, which increases production costs and does not allow unifying it.

The closest in technical essence is DEVICE AND METHOD FOR MANUFACTURING CHEVRON CONVEYOR BELT [CN104985802, publ. 10/21/2015], while the device contains an unwinding mechanism, a winding mechanism and a conveyor belt vulcanization mechanism located between the unwinding mechanism and the winding mechanism. The vulcanization mechanism includes an upper heating plate and a lower heating plate, which can press the mold and open the mold by a power mechanism. The chevron-inner mold plate is located on the bottom heating plate. The two ends of the lower heating plate are provided with a front connection mold groove and a rear connection mold groove, which can fix the connecting female mold plate. The chevron grooves of the mold connecting female plate may be in a butt joint to form chevron grooves of the butt joint chevrons corresponding to the chevron grooves of the chevron female mold plate. The chevron conveyor belt produced by this device is characterized by high efficiency, greatly reduced labor intensity, and reduced pollution of the working environment. In addition, the conveyor belt is further characterized by a long service life.

The main technical problem of the prototype is the stationary nature of the chevron grooves of the mold, which does not allow you to quickly change the configuration of the chevron pattern when a production need arises, which necessitates the use of many different dies and, thus, complicates and increases the cost of production.

The objective of the invention is to eliminate the disadvantages of the prototype.

The technical result of the invention is the expansion of the technological capabilities of manufacturing chevron ribbons, as well as an increase in the number of variants of chevron patterns when using a limited number of template elements.

The specified technical result is achieved due to the fact that the method of vulcanization of the chevron tape, characterized in that the initial configuration of the chevron pattern is formed, for which the locations of the matrix elements are marked on the rubber tape, the said places are degreased and a solution for hot vulcanization is applied to them, in the cavity for rubber tabs inside the matrix elements lay raw rubber, the matrix elements are placed at predetermined intervals according to the planned locations of the chevrons on the rubber band, the matrix is placed on top of the lower part of the press, pressure is applied to the matrix with heating by means of the upper part of the press, forming a chevron pattern on the section of the rubber band, on which the matrix elements are placed, after which the above actions are repeated for the next section of the rubber tape, while changing the configuration of the chevron pattern, for which new locations of the matrix elements are marked and the configuration of the matrix elements corresponding to them is formed, obtaining a non-periodic chevron pattern on the rubber tape, while during the formation of a chevron pattern on the section of the rubber band, the matrix is subjected to a pressure of 0.1 to 10 atm at a temperature of 150 to 180°C and a duration of 20 to 60 minutes.

In particular, in each element of the matrix, simultaneously with the rubber, a metal insert is placed, the upper part of the press, when lowered, presses the said insert into the matrix, providing the necessary pressure.

Brief description of the drawings.

In FIG. 1a shows a top view of a matrix element in a linear design.

In FIG. 1b shows a side view of the matrix element in a linear design.

In FIG. 2 shows a top view of the matrix element in the corner design.

In FIG. 3 shows options for the appearance of finished chevron ribbons.

In FIG. 4 shows a diagram of the chevron strip vulcanization process.

The figures indicate: 1 - rubber band, 2 - matrix element, 3 - cavity for laying rubber, 4 - lower part of the press, 5 - upper part of the press.

Implementation of the invention.

To implement the proposed method on the rubber band 1 pre-mark the location of the elements of the matrix 2 and clean (degrease) the mentioned places. In various embodiments, the implementation of the rubber tape 1 can be made in the form of a conveyor rubber-fabric, rubber-cord tape or a textile belt.

After degreasing, a solution for hot vulcanization is applied to the locations of the elements of the matrix 1.

In the cavity for laying rubber 3 inside the elements of the matrix 2, made of metal, preferably aluminum, raw rubber is laid, and the said template elements of the matrix 2 are placed at predetermined intervals, respectively, according to the planned locations of the chevrons on the rubber band 1.

The matrix, formed from the elements of the matrix 2, is placed on top of the lower part of the press 4, pressure is applied to the matrix by means of the upper part of the press 5 and, thus, the required pattern of the rubber band 1 is formed in the area where the figured template elements of the matrix 2 are placed, after whereupon the mentioned actions are repeated for the next section of the rubber band 1.

The pressing process is characterized by the following parameters: pressure 0.1…10 atm, temperature 150…180°С, holding time 20…60 min.

In one of the embodiments, in each element of the matrix 2, simultaneously with the rubber, a metal insert (not shown in the figures) is placed, slightly protruding above the surface of the matrix, the upper part of the press 5, when lowered, presses the said insert into the matrix and thereby creates the necessary pressure.

The claimed technical result - the expansion of technological capabilities for the manufacture of chevron ribbons and an increase in the number of options for chevron patterns when using a limited number of template elements - is achieved by providing the possibility of using any required combination of simple universal elements of the matrix 2 to form a matrix, which allows, if a production need arises, to quickly change the configuration chevron pattern eliminates the need to use many different dies and thus reduces complexity and manufacturing costs.

The use of metal inserts provides an increase in useful pressure on the matrix from the upper part of the press 5 and, thus, increases the efficiency of rubber pressing during vulcanization.

Also, the claimed technical solution provides a reduction in the complexity of the vulcanization process due to the placement of raw rubber in the cavities for laying rubber 3, which, compared with the method, which includes the supply of rubber inside the elements of the matrix 2 under pressure, saves energy and simplifies the process.

Also, the claimed technical solution makes it possible to form a chevron pattern of a complex non-periodic shape due to the ability to combine the elements of the matrix 2 in the required order.

An example of achieving a technical result.

In 2021-2022 In accordance with the description of the proposed method, the authors of the invention made samples of matrix elements of various shapes and sizes (the diagrams shown in Fig. 3 illustrate, but do not limit the list of possible options for chevron patterns), various combinations of which were tested in the production process of an enterprise specializing in production of rubber conveyor belts.

Tests have confirmed a 40-60% reduction in the production time of chevron ribbons compared to known methods that use a stationary non-type-setting matrix, while reducing energy costs by 20-25%.

Claims (2)

1. A method for vulcanizing a chevron tape, characterized in that the initial configuration of the chevron pattern is formed, for which the locations of the matrix elements are marked on the rubber tape, the said places are degreased and a solution for hot vulcanization is applied to them, a raw rubber, the matrix elements are placed at predetermined intervals according to the planned locations of the chevrons on the rubber band, the matrix is placed on top of the lower part of the press, pressure is applied to the matrix with heating by means of the upper part of the press, forming a chevron pattern on the section of the rubber band on which the matrix elements are placed, after whereupon the mentioned actions are repeated for the next section of the rubber tape, while changing the configuration of the chevron pattern, for which new locations of the matrix elements are marked and the configuration of the matrix elements corresponding to them is formed, obtaining a non-periodic chevron pattern on the rubber tape, while during the formation of the chevron pattern on the section rubber band impact on the matrix pressure of 0.1 to 10 atm at a temperature of 150 to 180°C and a duration of 20 to 60 minutes. 2. The method according to claim 1, characterized in that in each element of the matrix, simultaneously with the rubber, a metal insert is placed, the upper part of the press, when lowered, presses the said insert into the matrix, providing the necessary pressure.

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