SU622773A1 - Method of automatic stabilization of mineral wool mat density - Google Patents

Description

The invention relates to the manufacture of products from mineral wool and can be used to stabilize the density of the carpet in the conveyor method of producing products from fiber materials.

One of the main indicators of the quality of mineral wool products is their density, which should be uniform throughout the volume of the product.

There is a method of controlling the consumption of a binder in the production of mineral wool products, including the measurement of the density of conveyor speed pLJ.

This method does not provide for the regulation of the quality of XRW Under the conditions of the production of mineral wool products, due to the random law of formation of bulk density in the fiber bed, the mass output of the fiber from the chamber is characterized by large fluctuations, resulting in the need to first stabilize the output of the bulk mass of the mineral fiber fiber, which cannot

be implemented by the above mentioned method.

And there is another way to stabilize a mineral wool carpet, which includes increasing the density of the mineral wool carpet and regulating the speed of conveyors. Moreover, the result of the density measurement is used to control the conveyor belt of the polymerization deposition chambers and drive the intermediate conveyor. In order to improve the quality of the mineral wool carpet, an additional signal in front of the polymerization chamber is measured, which is proportional to the change in the density of the carpet, with which the speed of the conveyor belt of the polymerization chamber 2 is adjusted. ;

Such a method has significant deficiencies, since the mineral wool carpet is relatively thick, and its size is purely random, then the measured density values on the Bbfxoae fiber deposition chamber R at the entrance of the polymerization chamber, where the carpet is already formed, are in no way correlated. This fact leads to this. The use of a second density meter at the entrance of the polymerization chamber does not give the desired effect.

In addition, prepressing the cooling carpet in front of the polymerization chamber leads to disruption of its structure and lower quality. However, the most serious disadvantage of the above method is the error in measuring the density when the speed of conveyors changes.

The purpose of the invention; The KanecjiBa mineral wool carpet is raised.

This is achieved by the method of automatic stabilization of a mineral wool carpet, which includes measuring the density of a mineral wool carpet and controlling the speed of conveyors, tightly of a mineral carpet carpet is measured at the end of the camera at several points, then the resulting density values are summed by the number of density measurement points and the average value obtained the density is compared with the specified density of the mineral wool carpet, and the speed control of the conveyor belt is carried out according to difference the signal compares the average density value with its target value.

The drawing shows a scheme for implementing a method for automatically controlling the density of a mineral wool carpet.

The mineral-cotton carpet 1 is formed in the chamber of precipitation 2 and is transferred into the polymerization chamber 3 by conveyors 4-6 with electric drives 7-9, the speed ratio of which is set by the setting device 10.

The actual speeds of the conveyors are measured by speed sensors 11 13 and ax values are compared with those set in comparison unit 14. By matching the actual and given speeds through the drive control unit 15, the specified ratios are maintained (the leading conveyor is Kynneier 4).

The signal from the density meter 16, measuring the density of the mineral wool carpet at the output of the fiber deposition chamber, is fed to the valve 17, to the second input of which pulses are received from the pulse generator 18, the frequency of which varies from voltage proportional to. speed and speed 11. The values of the signals corresponding to the density of the laminate: koBpa at the moments of arrival

pulses from the generator 18 from the output of the valve 17 are fed to the integrator 19, where it is summed up, and then the total density value for the temporary material specified by the transmitter 20 is divided in the division unit 21 by a number equal to the number of pulses (number of measurements) recorded by the counter 22 in this inteo, vale.

The length of the set point 2O is set for each line of mineral wool products, based on the design features of the line and technological requirements.

Thus, in division block 21, an averaged density signal is obtained for a given number of measurements.

As the conveyor speed increases, the signal at the output of the speed sensor t 11 increases and, accordingly, the frequency of the generator 18 increases, thereby increasing the length of the {controlled area of the mineral wool xer entails an increase in the number of points where density measurement occurs and, consequently, the measurement error of the mineral wool carpet under the conditions of the changing conveyor belt, moving the mineral wool carpet.

The signal from division output 21 in bleszhe comparison 23 is compared with za-. By using this adat 24, the density value of mineral wool KOBga, -a difference signal from the output of comparison 23 is used to control the speed of conveyors, which results in stretching or compaction of mineral wool carpet 1 and a corresponding decrease or increase in its density.

Formula, and 3 about 8

The method of automatic stabilization of the density of a mineral wool carpet, which includes measuring the density of a mineral wool carpet and regulating the speed of conveyors, characterized in that, in order to improve the quality of the carpet, its density is measured in several wheelbarrows at the output of the chamber, the density measurements obtained add up to measurement points and the obtained average density value are compared with a given value, and the speed of the conveyors is controlled by the difference signal comparing the media its density value with its given value.

Sources of information taken into account in the examination:

1. For application number 2433144 / 29-33, cl. C 04 B 43 / O2, 1976, according to which

the decision to issue a copyright | evidence.

2., USSR Author's Certificate No. 84193, cl. From 03 To 32/10, 1973.