JP2016094330A - Method and apparatus for manufacturing glass chopped strand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing glass chopped strands, capable of preventing the occurrence of poor quality due to drying before cutting as much as possible even when manufacturing the glass chopped strands after temporarily winding a glass strand as a cake to manufacture the glass chopped strands having stable quality.SOLUTION: A method for manufacturing glass chopped strands comprises: bundling a number of glass filaments 1 having an applied sizing agent to form a glass strand 2; a winding step of winding the glass strand 2 as a cake 3; the drawing step of drawing the glass strand 2 from the cake 3; and a cutting step of obtaining glass chopped strands 4 by cutting the drawn glass strand 2. The atmosphere 30 where the cake 3 is placed in the drawing step is maintained in a wet state.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method and an apparatus for producing glass chopped strands.

  Glass fibers are widely used for the purpose of reinforcing various matrix resins. As an example, there is a use as a so-called FRTP (Fiber Reinforced Thermo Plastics) in which a thermoplastic matrix resin is reinforced with glass fibers. FRTP is used for various applications including automobile parts and electronic parts. Glass fiber used for FRTP, etc., continuously draws molten glass heated to 1200 ° C or higher in a glass melting furnace from a plurality of heat-resistant nozzles provided at the bottom of a bushing made of platinum or the like. It is produced by. And a sizing agent is apply | coated to the glass fiber surface after cooling, and a glass fiber is processed into products, such as a yarn, a roving, and a glass chopped strand, after passing through various processes after that.

  Here, there are roughly two methods for producing glass chopped strands. One is a so-called direct method in which a glass strand is directly cut immediately after forming a glass strand by bundling a large number of glass filaments (see, for example, Patent Document 1). The other is a so-called indirect method in which the formed glass strand is once wound up as a cake using a winder or the like, and then the glass strand is pulled out from the cake and cut (see, for example, Patent Document 2). . When manufacturing multiple types of glass chopped strands, by adopting the indirect method, it is possible to form cakes by type, and to draw and cut glass strands from multiple molded cakes at the same time. A plurality of cakes can be cut together for each type and a plurality of cakes can be cut, and efficient multi-type production becomes possible.

Japanese Patent Publication No. 8-5691 JP 2007-15883 A

  However, when the glass strand is once wound up as a cake and the glass strands for a plurality of cakes are cut together, a cake that has to wait for a long time is generated in the drawing process of the glass strand from the cake. , The moisture in the sizing agent is reduced.

  That is, one of the advantages of winding glass strands into a cake is that a plurality of glass strands can be cut together from a plurality of cakes, but the number of glass strands that can be formed at one time (ie, cakes). Is naturally limited from the viewpoint of equipment. Therefore, the cake once formed is kept waiting in the drawing process until a predetermined number is obtained. If it does so, the cake shape | molded first among predetermined numbers will wait, until the cake shape | molded last is conveyed to a drawing-out process. The sizing agent usually contains a lot of moisture as a solvent. Therefore, the water | moisture content in a sizing agent reduces by natural drying by making it wait for a long time in the state of a cake.

  On the other hand, glass chopped strands obtained by cutting glass strands are usually dried by heating or the like, whereby an organic component contained in the sizing agent is formed into a film. Therefore, in the heating and drying process, the heating amount (heating amount and heating time per unit time) is set in consideration of the amount of water contained in the glass strand (bundling agent) in advance. When the moisture in the agent is reduced, the glass chopped strand containing the sizing agent is excessively dried by heating. For glass chopped strands that have been heat-dried more than necessary, the organic film of the sizing agent covering the surface becomes brittle, so that the squeezing force of the glass chopped filaments is weakened and the possibility of causing fuzz and the like in the subsequent steps is increased. This is not preferable because the quality of the glass chopped strand is deteriorated.

  The above-mentioned problem is not limited to the case where a plurality of glass strands are pulled out from a plurality of cakes in a lump and cut, but for example, a step of winding a glass strand as a cake, and a step of drawing a glass strand from a cake This can occur in the same way when the cake is far away and it takes time to carry the cake.

  In view of the above circumstances, in the present specification, even when a glass chopped strand is manufactured after winding the glass strand once as a cake, the occurrence of poor quality due to drying before cutting is as much as possible. It is a technical problem to be solved by the present invention to prevent and produce glass chopped strands of stable quality.

  The solution to the above problem is achieved by the method for producing a glass chopped strand according to the present invention. That is, this manufacturing method includes a step of bundling a large number of glass filaments provided with a bundling agent to form a glass strand, a winding step of winding the glass strand as a cake, and a step of drawing out the glass strand from the cake. The glass chopped strand manufacturing method comprising a cutting step of obtaining a glass chopped strand by cutting the drawn glass strand, characterized in that the atmosphere in which the cake is placed in the drawing step is maintained in a wet state. .

  As described above, in the present invention, the atmosphere in which the cake is placed is maintained in a wet state in the drawing step where the standby time of the glass strand is likely to be long. Thereby, after being conveyed to the drawing process, the atmosphere around the cake waiting in the drawing process is kept in a very high humidity until the drawing work. Therefore, it is possible to prevent or effectively suppress the situation where the cake conveyed to the drawing process is dried, and to maintain the moisture content of the cake in an appropriate range. Therefore, even if a plurality of glass strands are pulled out and cut from a plurality of cakes, the glass chopped strands having a uniform moisture content by minimizing the variation in moisture content for each cake. Can be obtained. If there is no variation in moisture content in the state of glass chopped strands or it is very small, it can be heated and dried appropriately with a preset amount of heat, so the organic component film can be stably applied to the surface of the glass filament. Can be formed. Therefore, it is possible to stably provide a high-quality glass chopped strand that is excellent in handleability and can exhibit the desired performance.

  Moreover, the manufacturing method of the glass chopped strand which concerns on this invention may maintain the said atmosphere in a moist state by spraying water with respect to the said atmosphere. Moreover, in this case, water may be sprayed toward the atmosphere and in a direction different from the cake placed in the atmosphere.

  In this way, if water is sprayed on the atmosphere in which the cake is placed, the water can be supplied to the atmosphere in the form of fine particles (mist state). Therefore, it is possible to easily and effectively make the atmosphere wet. In the drawing process, since the organic component of the sizing agent contained in the cake (glass strand) has not yet been cured, there is a possibility that the uncured organic component will flow out if water is sprayed directly. On the other hand, if water is sprayed in a direction different from the cake placed in the atmosphere, the situation where water adheres to the cake can be prevented or suppressed as much as possible. Therefore, it is possible to prevent the sizing agent from flowing out, to form a glass chopped strand having an appropriate moisture content, and to perform subsequent heating and drying appropriately.

  Moreover, the manufacturing method of the glass chopped strand which concerns on this invention maintains the said atmosphere in a moist state by maintaining the humidity of the said atmosphere at 70% or more, More preferably, maintaining at 80% or more. There may be.

  When the present inventors verified an appropriate range as the humidity of the atmosphere, by maintaining the humidity (relative humidity) of the atmosphere at 70% or more, more preferably by maintaining it at 80% or more, from the cake It has been found that the water content during winding can be maintained by substantially preventing the disappearance (drying) of the water. Therefore, by maintaining the humidity of the atmosphere at 70% or more, the atmosphere can be reliably maintained in a wet state, and thereby stable quality after heating and drying can be obtained. In addition, when the humidity (relative humidity) of the atmosphere exceeds 100%, moisture in the atmosphere is manifested as water droplets and may adhere to the surface of the glass strand constituting the cake. It is preferable to maintain the humidity at 80% or more and less than 100%.

  The glass chopped strand manufacturing method according to the present invention wets the atmosphere in which the cake or the glass strand is placed in at least a part or all of the steps including the drawing step out of a series of steps from the winding step to the cutting step. It may be maintained in a state.

  As described above, the present invention aims to prevent drying of the cake after the glass strand is wound as a cake in the winding process until the glass strand drawn from the cake is cut. Therefore, it is desirable that the humidity of the atmosphere is adjusted not only in the drawing process but also in the processes before and after the drawing process. From the above viewpoint, if the atmosphere in which the cake or the glass strand is placed in a part or all of the steps including at least the drawing step among the series of steps from the winding step to the cutting step is maintained in a wet state, Drying of the glass strands wound up as a cake can be further reduced or completely prevented. Therefore, it becomes possible to supply the glass chopped strand having the moisture content as expected to the heat-drying step after cutting, and it is possible to obtain a glass chopped strand having a stable quality without variation.

  Moreover, the solution of the said subject is achieved also by the manufacturing apparatus of the glass chopped strand which concerns on this invention. That is, this manufacturing apparatus includes a bundling means for bundling a large number of glass filaments provided with a bundling agent to form a glass strand, a winding means for winding the glass strand as a cake, and a drawing means for drawing out the glass strand from the cake. And a glass chopped strand manufacturing apparatus comprising a cutting means for cutting the drawn glass strand, further comprising a wetness maintaining means for maintaining an atmosphere in which a cake to be drawn by the drawing means is placed in a wet state Characterized with points.

  Thus, in the manufacturing apparatus according to the present invention, the wetness maintaining means for maintaining the atmosphere in which the cake to be pulled out is placed in a wet state is provided. Thereby, after being conveyed to the drawing process, the atmosphere around the cake waiting in the drawing process is kept in a very high humidity until the drawing work. Therefore, it is possible to prevent or effectively suppress the situation where the cake conveyed to the drawing process is dried, and to maintain the moisture content of the cake in an appropriate range. Therefore, even if a plurality of glass strands are pulled out and cut from a plurality of cakes, the glass chopped strands having a uniform moisture content by minimizing the variation in moisture content for each cake. Can be obtained. If there is no variation in moisture content in the state of glass chopped strands or it is very small, it can be heated and dried appropriately with a preset amount of heat, so the organic component film can be stably applied to the surface of the glass filament. Can be formed. Therefore, it is possible to stably provide a high-quality glass chopped strand that is excellent in handleability and can exhibit the desired performance.

  As described above, according to the present invention, even when a glass chopped strand is produced after the glass strand is once wound up as a cake, it is possible to cause poor quality due to drying before cutting. Therefore, it is possible to manufacture a glass chopped strand having a stable quality.

It is a principal part side view of the manufacturing apparatus of the glass chopped strand which concerns on one Embodiment of this invention. It is a principal part side view which concerns on the process after the principal part of the manufacturing apparatus shown in FIG.

  Hereinafter, an embodiment of a method and apparatus for producing a glass chopped strand according to the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a side view for explaining the outline of a glass chopped strand manufacturing apparatus according to an embodiment of the present invention. The manufacturing apparatus 10 mainly includes a spinning means 11 for forming a glass filament 1 from molten glass, a focusing means 12 for forming a glass strand 2 by focusing a large number of glass filaments 1 provided with a focusing agent, and a glass strand. Winding means 13 for winding 2 as cake 3, drawing means 14 for drawing glass strand 2 from cake 3, cutting means 15 for cutting drawn glass strand 2, and wetness maintenance means 16 described later. Moreover, in this embodiment, the conveyance means 17 which conveys the cake 3 formed by winding the glass strand 2 with the winding means 13 to the next process (here, drawing process) is further provided.

  The spinning means 11 includes a melting furnace 18 for supplying molten glass as a raw material of the glass filament 1, and a bushing 19 for forming the glass filament 1 by drawing the molten glass supplied from the melting furnace 18 from a nozzle (not shown). Have

  Here, as a raw material of the glass filament 1, publicly known glass can be used for glass fiber, for example, E glass (for example, glass fiber can be easily made into fibers and excellent in properties as a fiber) An alkali component content of 2.0% by mass or less) can be suitably used. Of course, other kinds of glass can be used, for example, AR glass showing alkali resistance, C glass having acid resistance, D glass showing low dielectric constant, H glass showing high dielectric constant, high strength and high It is also possible to use T glass exhibiting an elastic modulus, M glass exhibiting a high elastic modulus and containing beryllium, NE glass exhibiting a low dielectric constant and a low dielectric loss tangent, and the like.

  Further, as the glass filament 1 formed by the spinning means 11, for example, those having a diameter of 3 μm or more and 30 μm or less can be used, and those having a diameter of 6 μm or more and 25 μm or less can be used. It is.

  The bundling means 12 is located below the bushing 19, a bundling agent applying means 20 for applying a bundling agent to a large number of glass filaments 1 drawn from the nozzles of the bushing 19, and a large number (several number of bundling agents applied) And a concentrator 21 for concentrating hundred to several thousand glass filaments 1.

  Here, as the sizing agent, those having a known composition (organic component) for glass filaments can be used. For example, vinyl acetate-acrylic group obtained by graft-polymerizing an acrylic group-containing compound to a vinyl acetate homopolymer. While containing a containing compound copolymer as a main organic component, what contains water as an inorganic solvent can be used. The water here includes distilled water, industrial water, tap water and the like. Of course, the sizing agent may further contain components other than the main organic component and the solvent (inorganic solvent). For example, coupling agents such as aminosilane, binders such as epoxy resin and urethane resin, pH adjusters such as sodium citrate, sodium acetate, sodium hydroxide, potassium hydroxide, phosphoric acid, polyoxyethylene alkylamine, alkyl sulfonate, Antistatic agents such as quaternary ammonium chloride, surfactants such as fatty acid amides, fatty acid esters, fatty acid ethers, aromatic esters and aromatic ethers can be contained.

  Further, the ratio of water as an inorganic solvent in the sizing agent is appropriately set according to the organic component to be used, for example, 70% by mass or more and 99.8% by mass or less, preferably 90% by mass or more. And it is set to 99.5 mass% or less.

  The winding means 13 has a winder 22 that winds the glass strand 2 obtained by converging the glass filament 1 by the converging means 12 in a predetermined manner. A cylindrical member 23, also called a bobbin, is attached to the outer periphery of the winder 22, and the cake 3 is formed by winding the glass strand 2 around the outer peripheral surface of the cylindrical member 23 in a predetermined manner. .

  For example, as shown in FIGS. 1 and 2, the transport unit 17 includes a belt conveyor 24 on which a cake 3 formed by winding a glass strand 2 in a predetermined manner by a winder 22 can be placed and continuously transported. Of course, the conveying means 17 is not limited to this, and any configuration can be adopted. For example, although illustration is omitted, it is also possible to employ a hanger conveyor that can carry the cake 3 by suspending and supporting it. Alternatively, the cake 3 can be placed on the carriage and transported. Further, the number of transport units of the cake 3 may be one, and a plurality of transport units 17 may be present. That is, in the case of a hanger conveyor or a transport carriage (not shown), a plurality of cakes 3 may be suspended and supported or placed at a time and transported to the next process.

  The pulling means 14 holds the glass strands 2, a holding unit 25 that holds the plurality of cakes 3, a guide unit 26 for pulling out the plurality of glass strands 2 from the plurality of cakes 3 held by the holding unit 25. And a feed roller 27 and a cutter roller 28 for applying a drawing force. Among these, the feed roller 27 and the cutter roller 28 constitute the cutting means 15. Of course, it is also possible to provide means for applying a drawing force to the glass strand 2 separately from the feed roller 27 and the cutter roller 28 (cutting means 15).

  The holding portion 25 has a shelf shape in the illustrated example, and a partition 29 forms a space for holding the cake 3. Thus, the plurality of cakes 3 are individually separated from the periphery, and the glass strand 2 can be drawn out through a predetermined opening (opening in front of the paper surface in FIG. 2). Of course, as long as the holding | maintenance part 25 can hold | maintain the some cake 3, the form in particular is not ask | required. For example, as shown in FIG. 2, the cake 3 may be placed horizontally, or may be placed vertically.

  The wetness maintaining means 16 makes it possible to maintain the atmosphere 30 in which the cake 3 is placed in a wet state. Specifically, as shown in FIG. 2, a nozzle 32 for spraying water 31 to the atmosphere 30. Have In the present embodiment, two nozzles 32 that can rotate around a virtual vertical axis are arranged above the cake 3. In this case, the water 31 can be sprayed in a direction different from the cake 3 by disposing the nozzle 32 toward the radially outer side of the rotation axis (virtual vertical axis). In this case, it is preferable to set the arrangement direction in consideration of the spray angle of the nozzle 32.

  In the present embodiment, a partition wall 33 is provided to partition the atmosphere 30 from the surrounding atmosphere (for example, the space in which the cutting means 15 and the conveying means 17 are placed). The humidity in the atmosphere 30 in which 3 is placed can be adjusted easily and with high accuracy. Of course, the partition wall 33 may not be provided as long as the atmosphere 30 can be maintained at a required humidity (wet state). In addition, as long as the water 31 can be sprayed, arbitrary types are employable as the nozzle 32, For example, the two-component mixing nozzle which can use compressed air as a spray drive source of water is employable.

  Next, an example of the manufacturing method of the glass chopped strand using the manufacturing apparatus 10 of the said structure is demonstrated with the advantage of this invention.

  First, as shown in FIG. 1, the molten glass supplied from the melting furnace 18 is pulled out from the nozzle of the bushing 19 to form the filamentous glass filament 1 (spinning process). Then, a glass strand 2 is formed by bundling these multiple glass filaments 1 with a bundling machine 21 while applying a bundling agent to the multiple glass filaments 1 formed from a large number of nozzles with a bundling agent applying means 20. (Focusing process). The formed glass strand 2 is wound as the cake 3 on the outer peripheral surface of the cylindrical member 23 arranged on the outer periphery of the winder 22 by controlling the rotation of the winder 22 located on the downstream side (winding step). The cake 3 is conveyed to the next process (drawing process) by the conveying means 17 such as the belt conveyor 24.

  The cake 3 conveyed to the drawing process is held by the holding unit 25 as shown in FIG. When the cake 3 is continuously conveyed by the belt conveyor 24 as in this embodiment, the conveyed cakes 3 are placed one by one in the space partitioned by the partition plate 29 of the holding unit 25, When the predetermined number is reached, the glass strands 2 are pulled out from each cake 3 in one place. Therefore, in the cake 3 (for example, the lower right end of FIG. 2) conveyed first to the holding part 25 and the cake 3 (for example, the upper left end of FIG. 2) finally conveyed to the holding part 25, the holding part 25 The waiting time at is very different.

  Therefore, at least when the cake 3 is first transported to the holding unit 25, the atmosphere 30 in which the cake 3 (holding unit 25) is placed is wetted by the wetness maintaining means 16, and the wet state is maintained. . Specifically, at the time before the first cake 3 is conveyed, the water 31 starts to be sprayed from the nozzle 32 of the wetness maintaining means 16 and continuously until at least the last cake 3 has been conveyed. Water 31 is sprayed. Thereby, until the last cake 3 is hold | maintained at the holding | maintenance part 25, the atmosphere 30 where the cake 3 is put is maintained in a moist state. At this time, it is preferable to maintain the atmosphere 30 in a wet state by setting the humidity (more precisely, relative humidity) of the atmosphere 30 to 70% or more, and preferably 80% or more.

  In this way, the atmosphere 30 in which the cake 3 is placed is maintained in a wet state from when the first cake 3 among the plurality of cakes 3 starts to be carried into the drawing process until at least the last cake 3 has been carried in. Thus, drying of the cake 3 placed in the atmosphere 30 is prevented or suppressed as much as possible. Therefore, there is no substantial difference in the moisture content at the time of cutting between the cake 3 loaded first and the cake 3 loaded last. Therefore, as shown in FIG. 2, the glass chopped strands 4 obtained by drawing a plurality of glass strands 2 from the plurality of cakes 3 together and cutting them at once also have a small variation in moisture content. If the moisture content does not vary or is very small in the state of the glass chopped strand 4, the heating means 34 can be appropriately heated and dried with a preset amount of heat. It can be stably formed on the surface. Therefore, it is possible to provide a high-quality glass chopped strand 4 that can stably exhibit the desired performance.

  Moreover, in this embodiment, since the water 31 was sprayed in the direction different from the cake 3 placed in the atmosphere 30, the situation where the water 31 adheres to the cake 3 is prevented or suppressed as much as possible. can do. Therefore, it is possible to avoid increase / decrease in the composition of the sizing agent (particularly the water component ratio) accompanying the adhesion of the water 31, to form the glass chopped strand 4, and to perform subsequent heating and drying appropriately. Of course, as shown in the figure, if the cake 3 is placed horizontally and its periphery is partitioned by the partition plate 29 of the holding unit 25, the periphery of the cake 3 is covered with the partition plate 29 except for a part. Even when the water 31 is sprayed, the water 31 can be effectively prevented from adhering to the cake 3.

  In this embodiment, the nozzle 32 is disposed above the atmosphere 30 where the cake 3 is placed, and the water 31 is sprayed while the nozzle 32 is rotated about the vertical axis. The entire atmosphere 30 can be uniformly and efficiently moistened. At this time, as shown in FIG. 2, by providing the partition wall 33, the atmosphere 30 (space) where the cake 3 is placed and the surrounding atmosphere (space) are partitioned to further increase the effect. It is possible to maintain and maintain the atmosphere 30 in a moist state uniformly and uniformly.

  As mentioned above, although one Embodiment of the manufacturing method and manufacturing apparatus of the glass chopped strand which concern on this invention was described, naturally this manufacturing method and manufacturing apparatus can take arbitrary forms within the scope of the present invention.

  For example, in the above-described embodiment, the case where the water 31 is continuously sprayed to the atmosphere 30 in which the cake 3 is placed in the drawing process has been described, but it is needless to say that other modes can be adopted. That is, an aspect in which the water 31 is intermittently sprayed at regular intervals (time), for example, the humidity of the atmosphere 30 is measured at any time, and when the measured humidity is below a certain value (for example, less than 70%), As long as the atmosphere 30 can be maintained in a moist state, such as an embodiment in which the water 31 is sprayed each time, any means for maintaining the moist state can be employed.

  Further, for example, in the above embodiment, the case where only the atmosphere 30 where the cake 3 is placed in the drawing process is maintained in a wet state, but other atmospheres (spaces) may be maintained in a wet state. Absent. Specifically, not only the atmosphere 30 but also the atmosphere (space) where the winding means 13 is placed in the winding process, the atmosphere (space) where the conveying means 17 is placed in the conveying process, and the cutting in the cutting process At least one (most preferably all) atmosphere (space) in which the means 15 is placed may be maintained in a wet state. Of course, although it seems that it depends on the kind and application of the glass chopped strand 4, the atmosphere related to the steps other than the drawing step may be maintained in a wet state as long as a corresponding effect can be expected.

  Further, as described above, the glass chopped strand 4 obtained by the manufacturing method or the manufacturing apparatus according to the above description can adopt a highly productive method, and has stable characteristics, particularly excellent mechanical strength and friction, while adopting a highly productive method. The characteristics can be exhibited stably. Therefore, it can be suitably used as a reinforcing material for various resin parts such as automobile interior materials.

DESCRIPTION OF SYMBOLS 1 Glass filament 2 Glass strand 3 Cake 4 Glass chopped strand 10 Glass chopped strand manufacturing apparatus 11 Spinning means 12 Converging means 13 Winding means 14 Pulling means 15 Cutting means 16 Wet maintenance means 17 Conveying means 19 Bushing 20 Converging agent applying means 25 Holding section 30 atmosphere (drawing process)
31 Water 32 Nozzle 34 Heating means

Claims (7)

Forming a glass strand by bundling a large number of glass filaments to which a bundling agent has been applied;
A winding step of winding the glass strand as a cake;
Pulling out the glass strand from the cake;
In the method for producing a glass chopped strand, comprising a cutting step of obtaining a glass chopped strand by cutting the drawn glass strand,
A method for producing glass chopped strands, characterized in that the atmosphere in which the cake is placed in the drawing step is maintained in a wet state.   The manufacturing method of the glass chopped strand of Claim 1 which maintains the said atmosphere in a moist state by spraying water with respect to the said atmosphere.   The manufacturing method of the glass chopped strand of Claim 2 which sprays the said water toward the direction different from the cake put in the said atmosphere and the said atmosphere.   The manufacturing method of the glass chopped strand in any one of Claims 1-3 which maintains the said atmosphere in a moist state by maintaining the humidity of the said atmosphere at 70% or more.   The atmosphere in which the cake or the glass strand is placed in a part or all of the steps including at least the drawing step out of a series of steps from the winding step to the cutting step is maintained in a wet state. 4. The method for producing a glass chopped strand according to any one of 4 above.   The manufacturing method of the glass chopped strand in any one of Claims 1-5 further equipped with the heating process which heat-processes the said glass strand immediately after the said cutting process. Bundling means for bundling a large number of glass filaments provided with a bundling agent to form glass strands;
Winding means for winding the glass strand as a cake;
Drawer means for pulling out the glass strand from the cake;
In a glass chopped strand manufacturing apparatus comprising a cutting means for cutting the drawn glass strand,
The apparatus for producing glass chopped strands, further comprising wetness maintaining means for maintaining an atmosphere in which the cake to be pulled out by the pulling means is placed in a wet state.

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