RU20311U1 - DEVICE FOR PRODUCING MINERAL FIBER FROM MELT OF THERMOPLASTIC MATERIAL - Google Patents

Abstract

1. A device for producing mineral fiber from a melt of a thermoplastic material, comprising a multifilter feeder with dies for forming melt jets and a block chamber with upper and lower vertical channels forming vertical blast channels for passage of jets and an energy nozzle, characterized in that each die made confusor with a slotted cross-section and introduced into the corresponding upper vertical channel of the block camera, with each upper vertical channel of the block camera made to onfusor with a slit cross-section, and each lower vertical channel of the block chamber is made confusor-diffuser with a slit cross-section. 2. A device for producing mineral fiber from a melt of thermoplastic material according to claim 1, characterized in that it is provided with a spinneret chamber with a heated gas supply pipe located under the multifilter feeder and connecting the multifilter feeder to the block chamber. A device for producing mineral fiber from a melt of a thermoplastic material according to claims 1 and 2, characterized in that it is equipped with an energy carrier heating unit.

Description

A utility model relates to the field of manufacturing fibers from melts of thermoplastic materials, for example, basalt, used, in particular, for the production of heat-insulating materials.

A blasting device for producing fiber is known, comprising a block chamber mounted under a multifilter feeder with an energy supply nozzle and upper and lower bushings located under each of the dies, forming vertical channels for the passage of melt jets and annular nozzles for the energy carrier, and cooled screens installed on the upper plane of the block camera, located between the vertical channels. (see USSR AS No. 1135723, IPC S 03 В 37/06, published January 23, 85).

The disadvantages of the known device is low reliability due to the high probability of clogging of the vertical blast channels with the melt, and, therefore, the low efficiency of the device, the low quality of the obtained mineral fiber, since coarse (thick) fibers are obtained, and the increased energy consumption (compressed air) .

Since the discharge of each melt jet from the die is carried out at a certain distance from the corresponding vertical channel of the blowing device, by the time the melt stream enters the upper bushing of the vertical blow channel of the blowing device, from which the melt stream flows into the blower, its temperature decreases by 40-50. Cooled screens mounted on the blockchamber contribute to a decrease in the temperature of the air surrounding the melt stream, and hence the melt stream itself. Due to the large diameter of the melt jet (since the melt jet is formed in a nozzle made in the form of a sleeve), the melt jet has a different temperature in the cross section, in connection with this, the viscosity of the melt jet outside the jet is higher than inside, and for blowing the jet large diameter melt with different viscosity

Die-description-m. 2 / 423.05.019: 12kg

the cross section requires large energy costs (higher air pressure and increased air flow), a coarser fiber is obtained.

Moreover, the melt stream, having different viscosity of the melt in its variously oriented parts, touches the more viscous outer surface layer of the walls of the vertical blow channel, its movement at the point of contact is inhibited, and the melt partially adheres to the surface of the upper sleeve of the vertical blow channel, the internal volume of the melt stream, having a lower viscosity, getting into the lower sleeve of the vertical blast channel is sprayed with energy.

A more viscous melt remaining on the walls of the vertical blast channel flows at the same speed as a new portion of the melt, the melt stream is bent by a loop, narrowing the vertical blast channel. Over time, the vertical blast channel becomes clogged and the melt fills the upper surface of the blast chamber block chamber.

A device for producing mineral fiber from a melt according to a. from. USSR No. 1135723, as the solution closest in technical essence, was taken as the closest analogue.

A useful model solves the problem of improving the reliability of the device for producing mineral fiber from a melt of thermoplastic material, aimed at achieving the following technical result - reducing the likelihood of clogging of vertical blast channels of the block chamber by the melt.

This problem is solved by reducing the temperature decrease and decreasing the increase in the viscosity of the melt jet on the way from the exhaust from the die to the corresponding vertical blast channel of the block chamber.

The specified technical result is achieved due to the fact that in the device for producing mineral fiber from a melt of thermoplastic material containing a multifilter feeder with dies for forming melt jets and a block chamber with upper and lower vertical channels forming vertical blast channels for passage of jets and nozzles for energy carrier, each die

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made confusor with a slit cross-section and introduced into the corresponding upper vertical channel of the block camera, while each upper vertical channel of the block camera is made confusor with a slit cross section, and each lower vertical channel of the block chamber is made confusor-diffuser with a slit cross section.

To increase the uniformity of temperature and viscosity of the melt jet, the device is equipped, located under the multi-filter feeder and connecting the multi-filter feeder with the block chamber, a die chamber with a heated gas supply pipe.

To increase the uniformity of temperature and viscosity of the melt jets, the device is equipped with an aggregate for heating the energy carrier.

In FIG. 1 schematically shows a device for producing mineral fiber from a melt; in FIG. 2 - section A - A in FIG. 1.

A device for producing mineral fiber from melt 1 of a thermoplastic material contains a multi-filter feeder 2 with dies 3 of confusor shape with a slit, for example, a rectangular-slit cross section (in the form of a narrow slit), a block camera 4 with corresponding dies 3, upper 5 and lower 6 vertical channels, forming vertical blast channels 7 for passage of jets 8 of the melt and nozzle 9 for energy.

Each upper 5 vertical channel of the block camera is made confuser with a slotted, for example, rectangular-slotted cross-section (in the form of a narrow gap). Each lower 6 vertical channel of the block chamber is made of confuser-diffuser with a slit, for example, a rectangular-slit cross-section (in the form of a narrow slit) and a significant opening angle of the diffuser part.

Between the multi-filter feeder 2 and the block chamber 4, a die chamber 10 is formed, which is equipped with a gas supply pipe 11. The cavity 12 of the block chamber is equipped with a pipe 13 for supplying energy.

The device operates as follows.

The jets 8 of melt 1 molded by dies 3 in the form of a thin flat ribbon are blown into the vertical blast channel 7 of the block chamber, while the release of jets of melt is carried out in the upper 5 vertical channel, for example, at its base. An energy carrier enters the nozzle 9 formed by the upper 5 and lower 6 vertical channels from the pipe 13 through the cavity 12, with the help of which the melt jets 8 are blown in the lower 6 vertical channel.

Since the spinnerets 3 are placed in the spinneret chamber 10, in which the temperature is maintained due to the natural heat transfer from the multifilter feeder 2, the temperature of the melt in the spinnerets and the melt jets 8 produced by their spinnerets decreases slightly. The temperature in the die chamber 10 can also be maintained by supplying heated gas to the nozzle chamber through the nozzle 11. Since the melt jets are molded flat, for example, in the form of a flat thin tape, the temperature in various parts of the jets decreases slightly, and therefore, the viscosity of the inner and surface layers of the jets are almost the same.

A jet with a low, evenly distributed viscosity, falling into the lower 6th vertical channel, having a diffuser part expanding significantly towards the outlet, is easily converted into a thin fiber 15 under the influence of an energy carrier (air pressure). The melt blast feed with uniformly distributed and low viscosity significantly reduces the likelihood of clogging of vertical blast channels. The gas supplied to the die cavity through the nozzle 11 creates additional ejection in the melt jet discharge zone, reducing the likelihood of the melt jet sticking to the surface of the upper 5 vertical channel.

The use of the invention in existing installations allows to increase fiber output by 10 -15% by reducing downtime due to clogging of vertical blast channels by the melt and to improve product quality due to the manufacture of thinner fibers.

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The utility model formula.

1. A device for producing mineral fiber from a melt of a thermoplastic material, comprising a multifilter feeder with dies for forming melt jets and a block chamber with upper and lower vertical channels forming vertical blast channels for passage of jets and an energy nozzle, DIFFERENT in that each die made confuser with a slotted cross-section and introduced into the corresponding upper vertical channel of the block camera, while each upper vertical channel of the block camera is made to nfusor with a slit cross-section, and each lower vertical channel of the block camera is made confusor-diffuser with a slit cross-section.

2. A device for producing mineral fiber from a melt of thermoplastic material according to claim 1, characterized in that it is provided, located under the multifilter feeder and connecting the multifilter feeder to the block chamber, the spinneret chamber with a heated gas supply pipe.

3. A device for producing mineral fiber from a melt of a thermoplastic material according to claim 1, 2, characterized in that it is equipped with an energy carrier heating unit. SPLIT A device for producing mineral fiber from a thermoplastic material.

Claims (3)

1. A device for producing mineral fiber from a melt of a thermoplastic material, comprising a multifilter feeder with dies for forming melt jets and a block chamber with upper and lower vertical channels forming vertical blast channels for passage of jets and an energy nozzle, characterized in that each die made confusor with a slotted cross-section and introduced into the corresponding upper vertical channel of the block camera, with each upper vertical channel of the block camera made to onfusor with a slit cross-section, and each lower vertical channel of the block chamber is made confusor-diffuser with a slit cross-section.  2. A device for producing mineral fiber from a melt of thermoplastic material according to claim 1, characterized in that it is provided with a spinneret chamber with a heated gas supply pipe located beneath the multi-filter feeder and connecting the multi-filter feeder to the block chamber. 3. A device for producing mineral fiber from a melt of a thermoplastic material according to claims 1 and 2, characterized in that it is equipped with an energy carrier heating unit.