JPS6245183B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for producing glass thread by drawing out molten glass as thread from a molten glass stream hardened in air through a spinning cone in a spinning chamber, the method comprising: In a spinning chamber exposed to radiant heat of a device for producing yarn, air or gas or a gas mixture is heated by the radiant heat in a serpentine heat exchanger and discharged after heating to promote yarn drawing and/or to promote yarn withdrawal and/or to expel the drawn yarn. Relates to a form of supply for processing.

The aforementioned method is used to produce fine glass threads. In this case, today containers are used which are made of heat-resistant material and are supplied with glass material either intermittently or continuously depending on the amount consumed. A method in which glass rods are arranged next to each other in a lattice pattern and the ends of the glass rods are continuously extruded according to the consumption condition and melted using a heating device is now rarely used.

The following description assumes that a container into which glass material is continuously supplied is used. From the outlet opening or nozzle in the bottom of the container, the molten glass exits in a separate stream and forming a so-called spinning cone outside the outlet opening or nozzle. This individual stream is air-cured, continuously drawn off, for example by means of drawing drums, bobbins or the like, and further processed.

Furthermore, a gas or a mixture of gases or mixtures for promoting yarn withdrawal and/or for treating the yarn is placed in a chamber connected to the outlet opening of the container in the direction of yarn withdrawal and exposed to the radiant heat of the container having this outlet opening, the so-called spinning chamber. It is known in principle as such (for example, German Patent Application No. 2460270 and US Pat. No. 3,248,192).

Furthermore, according to DE 22 11 150 A1, the gas or It is known to supply a carbon-containing or carbon-like material with a gas mixture and deposit this material on surfaces that are not desired to be wetted. For this purpose, an inert gas or a carbon-hydrogen gas with a relatively low amount of organic gases is supplied. This gas has a hydrogen component in the region of the glass flow.
In this case both gases are decomposed under heat. The supply of the gas or gas mixture takes place in a flat tube extending in the longitudinal direction of the glass container, if appropriate at an angle to the thread plane. The bend of this tube, which is located closest to the spinning opening and thus to the area of the spinning chamber, which is also at the highest temperature, has a number of outlet slots.

In this case, in order to produce a slit-distributed gas flow, there is only a single distribution pipe, similar to a flattened radiator, in which the hot constituents of the gas rise and the cold constituents As the components descend, the coldest part of the gas is located in the interior of the distribution tube at the bottom and substantially already decomposed components are located at the distributor slit. This is because gas that does not evaporate gathers in the lower part of the distribution pipe and is no longer consumed continuously.
This results in the disadvantage that the distribution pipe area, which is in the hottest area of the spinning zone and leads to the hottest part of the gas, is subject to premature damage due to thermal effects. Furthermore, gas separation is also facilitated in this case.

Furthermore, there are distribution problems with the known methods. This means that the closer the atomized gas flowing upward through the slit is located to the outflow opening of the glass and thus also to the area of the thread that is not yet completely cured, the more this atomized gas The space and time given to it to spread out while being distributed laterally becomes small. Furthermore, it must be taken into account in this case that the glass thread that is drawn out continuously at high speed creates an air flow directed in the drawing direction. When this air flow reaches the area of the atomized gas, it captures and entrains the atomized gas.

The object of the invention is to ensure that the heat that is present is utilized efficiently, that the equipment exposed to the radiant heat of the spinning chamber is nevertheless significantly protected, and that the atomized gas produced is distributed over the entire spinning chamber. The objective is to provide a method that guarantees that the Note that this problem also includes the provision of an apparatus for implementing this method.

According to the invention, this task is achieved in the method mentioned at the outset by first introducing air or a promoting gas in a heat exchanger into the area of the spinning chamber in the vicinity of the spinning cone, which is exposed to high radiant heat, and then introducing the air or promoting gas into the flow of air or promoting gas. introducing a liquid to form an air or promoter gas-liquid mixture from the air or promoter gas and the liquid, and when the air or promoter gas-liquid mixture absorbs heat and is vaporized into an atomized gas mixture; directing the air or the promoting gas-liquid mixture progressively away from the vicinity of the spinning cone of the spinning chamber as heating progresses and supplying the atomized gas mixture formed to a discharge tube via which it enters the spinning chamber; The solution was to distribute and drain over the drawn thread.

The features of the apparatus for carrying out the method of the invention are:
A device that produces glass thread by drawing out molten glass as thread through a spinning cone in an air-cured molten glass flow hollow spinning chamber, and in which the spinning chamber is exposed to the radiant heat of the device that melts the glass material. , the air or gas or gas mixture heated by the radiant heat in the serpentine heat exchanger and discharged after heating is supplied for facilitating yarn drawing and/or for processing the drawn yarn. A serpentine tube-shaped heating system has a container surrounded by a heat-resistant outer wall to contain the molten glass, and the glass thread is drawn out from an outflow opening or a spinning nozzle at the bottom of the container. The exchanger consists of at least two tubes, one of which is provided as a mixing tube with a source of compressed air and a supply of processing liquid with an outflow opening in the vicinity of the spinning cone of the spinning chamber. Located closer to the other tube as a discharge tube and in the area of the outlet opening of this discharge tube, a distribution surface is arranged which distributes the exiting gas mixture over the drawn-off thread.

In the method of the invention, air or a promoting gas is first introduced under pressure into a serpentine heat exchanger, then a liquid is introduced into the flow path of the air or promoting gas, after which the gas mixture generated is introduced into a discharge tube. The more heated the gas mixture is, the further away from the area of the spinning chamber in the vicinity of the spinning cone, where higher temperatures occur, is fed.
Such processing allows initially relatively cold gas and relatively cold liquid to flow into the very hot zone of the heat exchanger, cooling it and vaporizing it at the same time, whereas the heated mixture The gas passes from the area of the spinning chamber in the vicinity of the spinning cone to the area of the heat exchanger which is further away and therefore colder. This ensures that the heat present in the spinning chamber is utilized effectively and at the same time the heat exchanger present in the spinning chamber is significantly protected.

The invention will now be described with reference to the drawings: A device for carrying out the method of the invention has an outer wall 1 made of a refractory material held together by a molded frame, not shown in detail. ing. Attached to this outer wall 1 is a so-called nozzle strip 2 made of platinum or a platinum alloy. This nozzle strip 2 is open at the top so that it can accommodate the consumption caused by the withdrawal of the thread, as disclosed for example in DE 23 26 975 A1. The glass material can be supplied intermittently or continuously. The bottom 6 of the nozzle strip has an outflow opening. In this embodiment, this outlet opening has the form of a so-called spinning nozzle 3, each of which is formed with a spinning cone 4, from which the thread 5 is continuously drawn off. Since temperatures of 1000° to 12500° C. occur in the nozzle strip 2 and the nozzle strip 2 cannot be covered with a lining made of, for example, sheath, the spinning nozzle 3
Alternatively, in the chamber below the outflow opening, the so-called spinning chamber 7, relatively high temperatures occur, which are caused by the radiant heat.

In order to fill the spinning chamber 7 with a mist of gas which surrounds the individual threads and also the threads which are drawn off in groups, a heat exchanger, generally designated 8, is provided. Compressed air is supplied to the heat exchanger 8 from a compressed air source (not shown). In this case, "gas mist" is a general term that also includes discharged gases or gas mixtures or vaporized liquids, such as oils, antistatic agents, as well as simple water or mixtures. The atomized gas adhering to the drawn thread makes it oily and/or antistatic.

In the embodiment shown in FIG. 1, the heat exchanger 8 is partially embedded in the underside of the outer wall 1 next to the nozzle strip 2 and consists of at least one mixing tube 9 and a discharge tube 10. Both tubes are connected to each other by a vent tube 11. Compressed air at approximately 0.5 bar is first introduced into the mixing tube 9, and then a processing liquid, for example het oil, is introduced. Both components are introduced as a relatively cold medium into a mixing tube 9 located closer to the hot part of the spinning chamber 7, heated in the mixing tube 9, vaporized as a gas mixture, and exchanged heat. It reaches a cold area of the vessel opposite the spinning chamber, where it exits through a nozzle opening 12 or the like. In this way, the temperature difference between the media that promotes yarn withdrawal and/or creates a gas mixture that treats the yarn results in cooling of the parts of the heat exchanger that are close to the hotter parts of the spinning chamber. used for.

The exiting atomized gas mixture hits a distribution surface in the form of a sieve wall 13 and through the openings of this sieve wall an air flow in the direction of the arrow 14 formed by the withdrawal of the threads along the back side of the sieve wall. The threads are wrapped around each individual thread.

In the embodiment shown in FIGS. 2 and 3, a heat exchanger, generally designated 15, is provided. Compressed air is initially introduced into the heat exchanger 15 via a conduit 16 from a compressed air source (not shown). Cold compressed air goes through conduit 17
via which it reaches the mixing tube 18. A processing liquid is supplied to this mixing tube 18 through a supply tube 19 . The heated and vaporized mixed gas from the mixing tube 18 reaches the discharge tube 21 via the intermediate tube 20, and is discharged from the outlet opening 21' as a mist of gas.

In this embodiment as well, the tubing is arranged between the inlet of the compressed air and the outlet of the atomized gas, away from the spinning chamber and thus away from the action of radiant heat. For this purpose, the conduits 17, 18, 20 are fastened to the outside of the inclined leg 22 of the chevron plate 23.

Furthermore, in this embodiment the heat exchanger 15 is constructed as an exchangeable unit. For this purpose, the chevron 23 is moved with its horizontal leg 24 along a rail 26 formed by a chevron 25 fixed to the machine frame until the chevron 23 hits a stop, e.g. The nozzle strip 29 is configured to be movable until it abuts the outer surface of the heat-resistant outer wall 28 of the nozzle strip 29.

The discharge tube 21, which is at the greatest distance both vertically and horizontally from the hotter areas of the spinning chamber, is suspended on a tongue 30 attached to the underside of the horizontal leg 24.

A portion of the pressure of the compressed air is transferred to the conduit 16.
The pressure of the compressed air forces the gas mixture through the tubes of the heat exchanger and out of the outlet opening 21' in the form of a mist. Enough to make it squirt.

The ejected atomized gas is blown into a distribution device generally indicated by the reference numeral 31.

In the illustrated embodiment, this distribution device 31 has a thin plate 32 which extends obliquely towards the nozzle strip 29.
have. By spraying the atomized mixed gas onto the surface formed by the thin plate 32, the mixed gas is distributed in the width direction. Spinning nozzle 3
3 or the outflow openings are arranged in groups;
For example, if there is an interval corresponding to the width of the nozzle or more between 5, 6, or 7 or more spinning nozzles 33 in each spinning nozzle row of the 12 spinning nozzle rows in total, atomized The ribs 34 that guide the mixed gas to these spinning nozzle groups are attached to the thin plate 3.
It can be placed on top of 2.

As shown in FIG. 1, also in this embodiment,
The upwardly moving atomized gas mixture is entrained in an air stream in the direction of the arrow produced by the drawn thread.

The distribution device 31 is constructed as a replaceable unit and is movable on a bracket 35 fixed to the machine frame.

Generally, it is sufficient to supply the atomized gas from one or both sides of the spinning chamber, but as the number of spinning nozzle rows increases, the width becomes larger, and the atomized mixed gas is supplied from the outside to the center of the spinning chamber. If distribution into rows is not guaranteed, an additional discharge tube can also be arranged in the central zone of the nozzle strip in the manner of the invention. In this case, the outflow opening of the discharge pipe is shifted to face both sides, and a guide device corresponding to the thin plate 32 shown in FIG. be able to.

[Brief explanation of the drawing]

The drawings show a plurality of embodiments of the present invention, and FIG. 1 is a schematic sectional view of the first embodiment of the device of the present invention, and FIG. 2 is a schematic sectional view of the second embodiment of the device of the present invention. 3 are views of the main components of the apparatus shown in FIG. 2, viewed from the direction of the arrow in FIG. 2. DESCRIPTION OF SYMBOLS 1... Outer wall, 2... Nozzle strip, 3... Spinning nozzle, 4... Spinning cone, 5... Yarn, 6... Bottom,
7... Spinning chamber, 8... Heat exchanger, 9... Mixing tube,
10...Discharge pipe, 11...Vent pipe, 12...Nozzle opening, 13...Sheave wall, 14...Arrow, 1
5... Heat exchanger, 16... Conduit, 17... Conduit,
18... Mixing pipe, 19... Supply pipe, 20... Intermediate pipe, 21... Discharge pipe, 22... Leg part, 23... Chevron thin plate, 24... Leg part, 25... Chevron material, 26...
...Rail, 27...Side wall end surface, 28...Outer wall, 2
9... Nozzle strip, 30... Tongue, 31... Distribution device, 32... Thin plate, 33... Spinning nozzle, 3
4...Rib, 35...Bracket.

Claims (1)

[Claims] 1. From a molten glass stream hardened in air to a spinning chamber 7
A method for producing glass thread by drawing out molten glass as thread 5 through a spinning cone 4 within the spinning cone, the method comprising:
In the spinning chamber 7, which is exposed to the radiant heat of the device for melting the glass material, air, gas, or a mixed gas that is heated by the radiant heat in a serpentine heat exchanger and discharged after heating is used to promote yarn drawing and ( or) for the treatment of the drawn yarn, first air or a promoting gas is introduced in a heat exchanger into the spinning chamber 7 in the vicinity of the spinning cone, which is exposed to high radiant heat; or introducing a liquid into the promoting gas stream to form an air or promoting gas-liquid mixture from the air or promoting gas and the liquid, which air or promoting gas-liquid mixture absorbs heat and vaporizes into an atomized gas mixture. As the heating progresses, the air or the promoting gas-liquid mixture is guided gradually away from the vicinity of the spinning cone of the spinning chamber 7 and the formed atomized gas mixture is passed through the discharge tube 10,
21, and via the discharge pipes 10, 21,
A method for producing glass yarn, characterized in that the yarn drawn out into a spinning chamber 7 is distributed and flowed out. 2. The method according to claim 1, wherein the atomized mixed gas is sprayed onto a distribution surface. 3 From the molten glass stream hardened with air to the spinning chamber 7
An apparatus for producing glass thread by drawing out molten glass as thread 5 through a spinning cone 4 within the machine,
In the spinning chamber 7, which is exposed to the radiant heat of the device for melting the glass material, air, gas, or a mixed gas that is heated by the radiant heat in a serpentine heat exchanger and discharged after heating is used to promote yarn drawing and ( or) provided for the treatment of the drawn thread, having a container surrounded by a heat-resistant outer wall for containing the molten glass, with an outflow opening or In the type in which the glass thread is drawn out from the spinning nozzle, the serpentine heat exchanger 8, 15 is composed of at least two tubes 9, 10, 1.
7, 18, 20, 21, one of these tubes is connected to the compressed air source 16 and the processing liquid supply 19.
As mixing tubes 9, 18 with
The discharge pipe 10, 21 is located closer to the other pipe as the discharge pipe 10, 21 with
An apparatus for producing glass threads, characterized in that, in the area of the outlet openings 12, 21', there are disposed distribution surfaces 13, 32 which distribute the exiting gas mixture over the drawn-off thread 5.