JPS6259549A - Production of fiber of heat softening material - Google Patents

Abstract

PURPOSE:To obtain a fiber aggregate having uniform density distribution, by fiberizing molten glass, flying the fiberized glass through plural flying direction regulating cylinders to a conveyor, depositing the fibers thereon and rocking each regulating cylinder with the same period and phase. CONSTITUTION:Plural fiberizing means 18 and fiber flying direction regulating cylinders 20 are provided in the conveyor running direction side by side above a collecting conveyor 26 and a glass material (A) is introduced into each fiberizing means 18 and formed into fine fibers (B). The direction of the fire fibers (B) is regulated by each fiber flying direction regulating cylinder 20 and a binder is sprayed from binder spray nozzles 36 at the outlet of the cylinder 20 to drop the fibers (B) into a fiber collecting box 22. The dropped fibers (B) are then collected by the collecting conveyor 26. In the process, a pivot shaft 38 is rotated to rock each fiber flying direction regulating cylinder 20 in the direction crossing the running direction of the conveyor 26 with the same period, phase and amplitude. Thereby, the aimed fiber aggregate (C) having uniform thickness distribution in the width direction and density distribution is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing fibers of a heat-softening substance such as molten glass, and in particular, immediately below a fiber-forming means of a heat-softening substance,
f regulating the flight direction of the finely refined fibers by the means;
This invention relates to a method for producing m-fibers made of a heat-softening material having a male flight direction regulating cylinder.

[Prior Art] In recent years, energy conservation and resource conservation have been sought after, and countermeasures have been taken from various viewpoints. Glass tag also has its quality characteristics, especially lightness or insulation? Due to its 7-layer structure, it has great success as an insulating material. It has also been used as a sound absorbing material since Urushi.

As is well known, the method for producing glass lJIAm is to finely finely form it in one stage of glass fiberization in a molten state, and collect it with a collection coilbearer installed below the fiberization means. It has a step of forming a laminate. Various methods are known as specific methods for producing short glass fibers, but among them, the following four methods are often used.

(,0 Steam spraying is method 2. A method of spraying high-pressure steam onto flowing molten glass, blowing it away, and turning it into wool.

■ Flame drawing method: A method of applying high-speed flame to solid thin glass wires to form them into fibers.

■ Centrifugal method: A method in which molten glass is shaken out using centrifugal force to form fibers.

(4) RGJi (rotary gas jet method), which is known in Japanese Patent Application Laid-Open No. 52-25113, etc.: A method of fining glass by blowing a high-temperature, high-pressure gas cylinder in a spiral shape along the flow of molten glass.

Therefore, the heat insulation or sound absorption properties, especially the heat insulation properties, of the glass fiber laminate described above will be reduced if unevenness occurs in the laminate, especially if there are ridges in the surface direction. this is,
This is because heat easily escapes from areas with low density. Therefore, a 111 m fiber flying direction regulating tube, sometimes called a forming tube, is installed below the R fiber means, and this fiber flying direction regulating tube is swung in a direction perpendicular to the conveyance direction of the collecting conveyor. A method is known in which the laminated thickness of fibers is made uniform by using
675 etc.).

By regularly moving the yL flight direction regulating tube Ifi, it is possible to alleviate lamination unevenness and expand the cotton collection width.

[Problems to be Solved by the Invention] In production equipment for glass m-fibers, a plurality of fiber forming means are usually installed in the conveying direction of the collection conveyor, and when a fiber flying direction regulating tube is provided, are installed under each fiberizing means to regulate the direction of flight of the H&female.

In this case, if each fiber flying direction regulating tube is oscillated arbitrarily and independently in time, the gas flows ejected from each fiberizing means will interfere with each other, and the gas flow will be disturbed (for example, if adjacent fiber flying direction When the direction regulating tubes intersect, the gas flow ejected from the eight-fiber flight direction regulating tubes also intersects, resulting in a very turbulent flow), so the flow of cotton that was flowing along with the gas flow also crosses. The resulting aggregate also has areas with a lot of cotton and areas with a lack of cotton.

[Means for Solving the Problems] The method for producing fibers of a thermosoftening material of the present invention uses a plurality of swinging RAM flight direction regulating tubes to regulate the flight direction of F8 fibers. However, in the method in which the fibers are collected by a collection conveyor to form an aggregate, the fiber flight direction regulating tubes are oscillated at the same period and in the same phase.

Preferably, each fiber flight direction regulating tube can be oscillated with the same amplitude.

[Function] In the uninvented method for producing fibers of a heat-softening substance, the fiber waste γ wing direction regulating tubes do not intersect when swinging, so the gas flow ejected from each fiber flight direction regulating tube is No disturbance occurs. Therefore, the density distribution of the aggregate obtained by being collected on the collection coveyer becomes uniform.

[Example] Examples will be described below with reference to the drawings.

1 and 2 are cross-sectional views showing essential parts of an apparatus for producing short glass m fibers, and FIG. 2 is a cross-sectional view taken along the line TI-II in FIG. 1.

First, the overall configuration of the apparatus will be explained with reference to FIG.

Reference numeral 1.0 is a glass melting furnace to which a forehearth 12 is connected. A plurality of molten glass outlet ports 14 are provided at the bottom of the forehearth 12, and each outlet port 14 is provided with a plunger 16 for flow rate adjustment.

A fiberizing means 18 is installed below each outlet 14, and a fiber flying direction regulating tube 20 is installed below each fiberizing means 18 in a direction (, 1 In the embodiment, it is installed so as to be swingable in the orthogonal direction.

A cotton collecting chamber 22 is installed below the fiber flying direction regulating cylinder 20, and defines a cotton collecting chamber 24 through which the flying fibers pass. A collection conveyor 26 is installed so as to face the opening on the lower side of the cotton collection granite 22. This collection conveyor is configured to circulate an endlessly connected net while guiding it with rollers 26a. A suction 28 that opens upward is installed opposite the upper feeding section of the collection conveyor 26. Reference numeral 30 is an exhaust port, to which a pipe (not shown) for connecting the suction sentry 28 to a suction device is connected.

Reference numeral 32 denotes a heat treatment furnace, which is installed adjacent to the collection conveyor 26 as shown.

In this embodiment, the fiberizing means 18 is connected to the collecting conveyor 2.
A large number of them are installed in the conveying direction of the conveyor 6, and two of them are arranged close to each other from the downstream side of the conveyor conveyance (right side in the figure), forming a -C pair. Further, the inside of the cotton collecting chamber 22 is divided into a plurality of sections, and a plurality of cotton collecting chambers 24 are installed therein. pass through the inside.

Next, details of the device configuration will be explained with reference to FIG.

The RMi conversion means 18 employs a rotary gas jet method in this embodiment. Reference numeral 18a is a refractory container-shaped vessel lined with platinum or platinum alloy, and has a glass outlet 18b at its bottom. Further, a gas jet port 18c for jetting a swirling gas jet toward the glass flow flowing out from the flow port 18b.
is provided so as to surround the outlet 18b.

A binder spray nozzle 36 is attached to the bottom of the fiber flight direction regulating tube 20 via a bracket 34, and sprays binder toward the fibers flying downward through the fiber flight direction regulating tube 20.

A collection conveyor 2 is installed on the side of the fiber flying direction regulating cylinder 20.
A pivot shaft 38 extending in the feeding method No. 6 is installed, and can be rotationally driven by a power device such as a motor. A disk 40 is fixed to this pivot 38 in correspondence with the installation position of each fiber flight direction regulating tube 20, and both ends of the connecting rod 42 are connected to the fiber flight direction regulating tube 20 and the disk 40 by pivot pins, respectively. It is pivoted by 44.46. In addition, axis 3
8 and each connecting rod 42 are pivotally attached so that they take the same mounting posture when the pivot 38 is stopped.
When rotated, each fiber flight direction regulation 020 is oscillated with the same period, the same phase, and the same amplitude.

The fiber flight direction regulating tube 20 may have a circular, oval, rectangular, square, or polygonal shape such as a hexagonal cross section. The height is preferably about 5 to 70 cm. If it is too high, the driving force for swinging will increase and the #a
Males are more likely to get stuck. On the other hand, if it is too short, the force regulating the direction of fiber flight is small.

It is preferable that the fiber flight direction regulating tube 20 has a rounded entrance portion. this is,! a The fiber flying direction regulating tube 2 is entrained by the air ejected from the fiber fiber handing means 18 from the surroundings.
This is to smooth the airflow flowing into the interior and increase the amount of inflowing air.

It is preferable that the fiber flight direction regulating tube 20 is movable one level below its installation level. For example, when the amount of gas ejected from the fiberizing means 18 is large, the fiber flying direction regulating tube 2
0 approaches the fiberizing means 18, and the fiber flying direction regulating tube 2
By reducing the inflow of air 4 from the surroundings into the fiber B, the speed at which the fibers B are collected onto the collecting conveyor can be reduced. Conversely, the amount of gas ejected from the fiberizing means 18 is If it is low, the cotton collection speed can be increased by increasing the amount of cooling air by regulating the direction of the flying force 920r.

Moreover, by making the fiber flight direction regulating cylinder 20 narrower on its outlet side than on its inlet side, it is possible to prevent the binder from being sucked into the fiber flight direction regulating cylinder 20. That is, depending on the installation orientation of the binder spray nozzle, the binder may enter the fiber flight direction regulating tube 20 and adhere to its inner surface, and the m fibers B may enter the fiber flight direction regulating tube 20.
It may adhere and grow on the inner surface, become lumps, fall off, and be mixed into the product, but if the outlet side is narrowed as described above, this problem can be eliminated.

Next, the operation of the above embodiment device will be explained.

The glass substrate A whose temperature has been adjusted in the forehearth 12 is
By adjusting the position of the plunger 16, the flow 11i enters the fiberizing means 18 in a controlled manner.

There, the fibers B are oriented by the m-fiber flight direction regulating tube 20, and are also sprayed with binder by the snow duster spray nozzle 36, falling into the cotton collection granite 22. At the bottom of the cotton collector 22, a collecting core 26 is moving rightward in FIG.

In order to make the laminated thickness distribution and density distribution of the aggregates C on the collecting conveyor 26J2 uniform, the pivot shaft 38 is rotated, and each fiber flight direction regulating tube 20 is moved at the same period, the same phase, and the same. Swing with amplitude.

As a result, the airflows flowing out from the fiber flight direction regulating cylinder 20 do not cross and interfere with each other, and the collection conveyor 26L
The fibers B are collected in a controlled manner, and an aggregate C having a uniform thickness distribution and density distribution in the width direction is obtained.

In Example 1, a fiberization method using a rotary gas jet method is adopted, but a method for fiber spraying, a flame stretching method,
W1 fiber formation by a method such as a centrifugal method may be adopted.In addition, in the centrifugal method, a jet flow of gas is not required for the glass drawing itself, but the short glass fibers drawn by centrifugal force Since a gas jet flow is used to align the flight direction of the short fibers, the flight direction of the short fibers conveyed by this gas jet flow is regulated by a fiber flight direction regulating tube that swings at the same period and phase. , As in the above embodiments, the turning process is to obtain a laminate having a uniform thickness and density distribution.

In the above embodiment, /Hingu is sprayed toward the fibers B, but various binders such as an aqueous solution of phenol resin, melamine resin, etc. can be used as the binder. This pine goo component is hardened by heat treatment in the heat treatment furnace 32.

In Example J, the cotton collection #422 is divided to form a plurality of cotton collection chambers 24. In this case, all the m# flight direction regulating cylinders 20 do not necessarily have to be oscillated in the same period, in the same phase. It is sufficient if the cylinders 20 are oscillated in the same period and in the same phase.The explanation in item 1-1 relates to the case of manufacturing glass fiber, but in the present invention, rock wool, slag wool,
It can be applied to various methods of manufacturing fibers, such as silica alumina fibers, in which a heat-softening substance is stretched, made to fly, and collected.

Preferred specific examples will be described below.

A glass fiber assembly was manufactured using the apparatus shown in FIGS. 1 and 52. The accumulation target was set at 500 g/m'', and the density distribution of the aggregate was measured before being introduced into the heat treatment furnace.

Other main manufacturing conditions are shown below.

Size of fiber flight direction regulating tube: height 50 cm, inner diameter 12 cm in the swinging direction, inner diameter 40cm in the direction perpendicular to the swinging direction.

Swing angle of the fiber flight direction regulating cylinder: 20 degrees in total on the left and right E motion period = IO times/min Width of the aggregate: 100 cm The obtained aggregate was cut into a square mat shape with a length of 100 cm and a width of 100 cm. Three mats were extracted from among them, and the square mats were further cut into 10 cm x IO cm to form sample pieces, their weights were measured, and the average die breakage and standard deviation were determined. Such ffm determination was performed three times.

For comparison, each adjacent fiber flight direction regulating tube 2
Similar measurements were made for the case where the phase of 0 was shifted by 180°. The results are shown in Table 1.

Table 1 From Table 1, it can be seen that according to the method of the present invention, the density is 1! It is clear that f is much more equalized.

[Effects] As described in detail, according to the present invention, it is possible to produce an aggregate of heat-softening fibers in which the density lIj is uniform and the thermal resistance value is significantly improved. be done.

In addition, since the m-fiber aggregate obtained by the present invention has a uniform density distribution and an excellent thermal resistance value,
Even if the rod average density is reduced, the same insulation effect as conventional products can be obtained.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing an example of an apparatus for carrying out the method of the present invention. IO...Glass melting furnace, 18...Fiberization f-stage, 2
0...m fiber flight direction regulating tube, 22...collected cotton yarn, 26
...Collection conveyor, 38...Axis, 42...Running rod.

Claims (1)

[Claims] (1) Fibers of a thermosoftening substance having a step of finely dividing a thermosoftening substance using a fiberizing means, flying the finely divided fibers toward a collecting conveyor, accumulating them on the collecting conveyor, and collecting them. In the manufacturing method, a plurality of fiberizing means are installed in the conveying direction of the collection conveyor, and a fiber flying direction regulating tube is provided below each fiberizing means, and each fiber flying direction regulating tube is connected to the conveyor. A method for producing fibers of a thermosoftening material, characterized in that each fiber flight direction regulating tube is oscillated in the same period and in the same phase, in the method of oscillating the fiber in a direction that intersects with the feeding method.