JPS60215856A - Heat treatment apparatus for molding mineral fiber mat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a heat treatment apparatus for forming a mineral fiber mat/mat, and particularly to a heat treatment apparatus for forming a mineral fiber mat containing an uncured binder. The present invention relates to a heat treatment device for mat molding.

[Prior art] A method for thermoforming mineral fiber mats (hereinafter sometimes referred to as chemical wool), which are made by spraying thermosetting resin on mineral fibers such as glass fibers, rock wool, and slag wool, to a certain thickness. Conventionally, as a heat treatment device, after the raw wool is pre-treated and formed using a forming roll, a mat tensioning drive is applied between a pair of fixed hot plates heated by an electric heater or combustion gas and held at a constant interval. A fixed hot plate system that is formed into a predetermined thickness by passing it through a belt (for example, Japanese Patent Publication No. 16393/1983). ■A pair of endless track devices consisting of endlessly connected perforated plates.
The raw wool is sandwiched between the upper and lower endless track devices arranged vertically at a predetermined interval and moved, and hot air heated to 150 to 280°C by gas combustion etc. is passed through the perforated plate. A moving hot plate type method (Japanese Patent Publication No. 39-29931) is known, in which the resin is sent to the sandwiched raw wool through the holes, thereby curing the resin and forming the resin to a predetermined thickness.

However, among these conventional devices, the one with the fixed hot plate method described in (2) has the possibility of being cut due to the frictional resistance of the hot plates when the matte uncured resin passes between a pair of fixed hot plates. Therefore, it is difficult to form a low-density fiber mat with low tensile strength. In addition, the moving hot plate type (2) requires a plurality of endless track devices, and the number of drive motors, reduction gears, etc. to be installed for driving these devices increases. Therefore, the equipment becomes complicated, which is disadvantageous in terms of power costs, equipment costs, maintenance, etc.

Moreover, in both methods (1) and (2), when changing the thickness of the mat to be molded, the elevating drive mechanism of the pair of fixed hot plates or the endless track device is driven each time. It is necessary to change the facing interval between the two, and it is necessary to install a drive mechanism for lifting and lowering, and the number of man-hours required for operation is also large.

``Object of the Invention'' The present invention has been made in view of the above-mentioned circumstances, and its purpose is to simplify the equipment, reduce power costs, equipment costs, etc., and to change the molded thickness of the mat. An object of the present invention is to provide a heat treatment apparatus for forming mineral fiber mats which is extremely easy to perform.

[Structure of the Invention] In order to achieve this object, the heat treatment apparatus for forming a mineral fiber mat of the present invention transfers the mineral fiber mat to be formed into a mat conveying apparatus consisting of an endless connected body of breathable members. Hot air is blown onto the mineral fiber mat evenly in the width direction of the mat from the side opposite to the transporting part while the mat is being transported by the transporting part, and the heat and wind pressure of this hot air are used to heat and pressurize and form the mat. It is.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a heat treatment apparatus for forming a mineral fiber mat according to an embodiment of the present invention in the mat conveyance direction, and FIG. 2 is a cross-sectional view taken along line 1--2 in FIG.

Reference numeral 2 denotes a furnace body, in which a conveying device for conveying the mineral fiber pine (1) which is formed by heating and pressurizing is installed. This conveyance device has a driving wheel 3, a driven wheel 4, and both wheels 3.
．． The rack is made up of an endless connected body 5 of air permeable members (for example, perforated plates, metal nets, etc.), which is passed between the two. The upper feeding section of this endless connected body serves as a conveying section 5a for conveying the mineral fiber mat 1, and the mat l is transferred to this conveying section 5a.
It is sent from the left side to the right side in the figure.

Further, as shown in FIG. 2, a sealing plate 6 extending in the longitudinal direction of the furnace body 2 is protruded from the side surface of the approximately middle section inside the furnace body 2.
The lower surfaces of both sides of the conveyance section 5a slide against the seal plate 6 to perform sealing. In the figure, 7.8 is a roller that presses down the mat l from above. Therefore, the inside of the furnace body 2 is this conveying section 5a.
The first chamber 1O1 is located above the transport section 5a, and the second chamber 20 is located below it.Each chamber 1O520 is divided into a first chamber 11-14 and a second chamber 21-24. .

That is, from the ceiling surface of the first chamber 10, partition walls 30 to 34 extending in the direction of the furnace body are vertically disposed at predetermined intervals, and a perforated plate 9 (its structure (will be described later), partition walls 40 to 44 extending in the width direction of the furnace body are similarly erected directly below the partition walls 30 to 34 on the top.
These partition walls (first partition walls) 30 to 34 and 40 to 44 form the first chamber into first small chambers 11 to 1 arranged in the conveyance direction.
Divided into 4 parts.

Further, second partition walls 50 to 54 are erected from the bottom surface of the second chamber (that is, the bottom surface inside the furnace body 2), and divide the second chamber into second small chambers 21 to 24 lined up in the conveyance direction. ing.

Note that the partition walls 30 to 34 and 40 to 44 are disposed close to each other so that their opposing surfaces are in contact with each other, thereby preventing ventilation between adjacent compartments. Further, the perforated plate 9 can be moved up and down as described later, but the partition wall 3
Spaces are provided between the lower ends of the partition walls 40 to 34 and the perforated plate 9, and between the upper ends of the partition walls 40 to 44 and the ceiling surface of the first chamber.

The partition walls 50 to 54 of the second chamber 20 have a height that reaches directly below the conveyance section 5a, and have an opening 55 at the root portion for allowing the return section 5b of the endless connector 5 to pass through. has been established.

As shown in the figure, the partition walls 50 to 54 of the second chamber 20 are similar to those of the first chamber 1.
0 partition walls 30 to 34. They are installed at positions below the partition walls 30 to 44, that is, at substantially symmetrical positions across the conveyance section 5a.
14 are located vertically below each other.

Pipes 71a, 72a, 73a, 74a for introducing high temperature pressurized gas are connected to each of the first small chambers 11-14, and gas discharge pipes 81a, 82 are connected to each of the second small chambers 21-24.
a, 83a, and 84a are connected. In addition, 71 in the figure
~74.81~84 are piping 71a~74a, 81a~
84a indicates the connected opening.

Further, on the upstream side of the pipes 71a to 74a, gas pushing units 771b to 74b are installed, and further upstream thereof, a gas heating means (not shown) is installed.

Although FIG. 2 is a cross-sectional view of the first small chamber 13 and the second small chamber 13, the cross sections of the other small chambers have the same configuration as FIG. 2.

Next, the structure of the perforated plate 9 will be explained.

The perforated plate 9 is disposed facing the conveying section 5a and is supported by a lifting device such as a hydraulic cylinder. In addition to the above-mentioned partition walls 41 to 44, partition plates 61 to 65 extending in the transport direction are erected on the upper surface of this perforated plate 9, thereby forming a space above the perforated plate 9 in the first small chamber 11-14. is divided into a plurality of spaces separated in the width direction, and dampers 66 to 69 are installed in each of the spaces. (The heights of the partition plates 61 to 65 are set so that their upper ends are at a lower level than the open lowers 1 to 74.) Then, the perforated plate 9, the partition plates 61 to 65, and the dampers 66 to 69.
A gas dispersion means for uniformly dispersing the high-temperature pressurized gas introduced into the first small chamber 11-14 in the width direction of the conveying portion is configured.

In Fig. 1, 91.92 is the pine tree in the matte-irregular part of the furnace body 2)
1, and the surface thereof can be heated by an appropriate heating means such as an electric heater or a gas combustion device.

The operation of the apparatus of the above embodiment will be explained below.

The mineral fiber mat 1 is preformed by pressurizing and heating only the front and back surfaces with forming rolls 91 and 92 in order to improve the smoothness of the front and back surfaces, and then the mat is introduced into the furnace body 2. After passing under the roll 7, it is conveyed in close contact with the conveyance section 5a, passes under the presser roll 8, and is sent out of the furnace.

During this time, the pine) 1 is heated and pressurized by the high-temperature pressurized gas introduced into the first small chamber 11-14 from the pipes 71a to 74a, and is pressed against the conveying section 5a and compressed by this wind pressure. It is heated by the heat possessed by the gas and molded to a predetermined thickness. That is, the high temperature pressurized gas sent out from the blowers 71b to 74b passes through the open lowers 1 to 74 to the first
The particles enter the small chambers 11-14, and are then evenly distributed in the width direction of the conveying section 5a by the partition plates 61-65, dampers 66-69, and perforated plate 9. The high-temperature pressurized gas that has passed through the holes in the perforated plate 9 hits the surface of the mat 1, presses the mat 1 against the conveyance section 5a, and passes between the fibers of the mat 1.
The resin adhering to the fibers is dried and cured.Then, the gas passes through the conveying section 5a, enters the second small chambers 21-24, and is discharged through the openings 81-84 and then through the discharge piping 81a-84a. Ru.

In this way, in the apparatus of the present invention, the mat 1 is pressurized by the wind pressure of high-temperature pressurized gas, and there is no need to install heating and pressurizing devices on both sides of the mat to be heat treated, as in conventional apparatuses. Since only one device is required to convey the mat, the overall configuration is simplified.

Further, the perforated plate 9 installed opposite to the conveyance section 5a is made of pine) 1
Since there is no contact with the mat l, there is no contact resistance when the mat l is conveyed within the furnace body 2, and there is no fear of mat breakage or deformation due to mat tension.

Furthermore, the molded thickness of the mat can be changed simply by changing the volume of high-temperature pressurized gas that is blown onto the mat l.

(At this time, it is preferable to raise and lower the roll 7 in accordance with the desired mat pressure.) In the present invention, the high temperature gas introduced into the first small chambers 11 to 14 is used to heat the mat. Any material can be used as long as it has the temperature and air volume that allow for molding.

For example, a resin mist-containing gas generated in a fiber manufacturing process, etc., may be made into a high-temperature gas by burning the resin mist contained in the width of the gas. Note that the gas discharged from the second small chambers 21 to 24 of the furnace body 2 may be circulated again to the small chamber of the node 1, and high-temperature gas may be mixed in from the middle of this circulation piping.

In the above embodiment, the perforated plate 9, the partitions [61 to 65,
Although a configuration consisting of tampers 66 to 69 is shown, various known means such as a current plate can be substituted. It has been found that in the structure of this embodiment, the molded thickness of the mat can be changed by changing the distance between the perforated plate 9 and the upper surface of the mat I. That is, the perforated plate 9 is made of pine) 1
The mat molding thickness becomes smaller when the mat is brought closer to .

On the other hand, if you move it further away, the thickness of the matte molding will increase.

The reason for this is presumed to be that when the perforated plate 9 is brought closer to the pine l-1, the gas that has passed through the holes in the perforated plate 9 acts more directly on the mat. Furthermore, by tilting the perforated plate 9 in the width direction of the conveying section, it is possible to adjust the thickness of the mat in the width direction. The thickness of the mat in the width direction can also be adjusted by changing the opening degrees of the dampers 66 to 69 and adjusting the gas blown onto the mat in the width direction of the mat. If the perforated plate 9 and the rolls 7.8 are attached to the same frame, it is possible to change the molded thickness of the mat simply by raising and lowering this frame.

Although the present invention has been described above in detail according to the embodiment shown in FIGS. 1 and 2, the apparatus of the present invention is not limited thereto, and various other states may be adopted.

For example, molding can be carried out satisfactorily even without the molding holes 91 and 92 for preforming. Further, heating means for the roll 7 may be provided so that the roll 7 provided on the mat inlet side in the furnace body 2 plays the role of this forming roll. (
However, since fibers containing a large amount of resin may adhere to the roll surface, it is preferable that the forming roll and presser roll are separate bodies. ) Furthermore, since the back surface of the mat is held by the conveying section 5a within the furnace body 2, only the upper forming roll 91 may be used.

Further, as an alternative to the forming roll, any means such as a belt or endless track can be used as long as it can make the surface of the mat smooth.

In addition, in the above-mentioned embodiment device, the pine tree l is passed through the upper surface of the conveying section 5a, but the endless track 5 is provided on the upper side inside the furnace body 2, and the mat l is passed along the lower surface of the conveying section. High-temperature pressurized gas may be blown from the bottom of the pine tree. Of course, the mat l may be passed through the furnace body 2 in a vertical or inclined position.

Therefore, the apparatus of the present invention is suitable for molded products of mineral fiber mats, especially those with low density (8 to 24 kg/go,
In particular, it is extremely effective for molding (1O~16Kg/rn').

[Effects of the Invention] As described above, the apparatus of the present invention sprays high-temperature pressurized gas onto the mat to pressurize and heat it to form it, and the apparatus has a simple configuration and is easy to maintain. It is.

Furthermore, the mat forming thickness can be easily changed, and there is no risk of the mat breaking during the forming process, allowing stable operation of the apparatus.

In addition, surface irregularities (such as traces of gaps between hot plates) caused by pressing a hot plate against the surface of the mat being formed using conventional equipment can be removed.
This does not appear with the device of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a heat treatment apparatus for forming a mineral fiber mat according to an embodiment of the present invention in the mat conveyance direction, and FIG. 2 is a cross-sectional view taken along the line 1--2 in FIG. l・・・・・・・・・・・・・・・Mineral fiber mat,
2・・・・・・・・・・・・Furnace body, 5・・・・・・
・・・・・・・・・Endless connector, 5a・・・・・・・
・・・・・・Transportation section, 9・・・・・・・・・・・・・・・
Perforated plate 9° 11-14...First small chamber, 21-24...Second small chamber, 61-65...Partition plate, 66-69...Damper, 71-74.81-84 ...opening. 78a... Piping for introducing high temperature pressurized gas. 73b...Blower, 8ga...Gas exhaust piping. Agent Patent Attorney Tsuyoshi Shigeno

Claims (3)

[Claims] (1) It has a furnace body that extends in the direction of conveyance of the mineral fiber mat to be heat treated, and in the furnace there is installed a conveyance section of a mat conveyance device consisting of endlessly connected breathable members, and the inside of the furnace is This conveying section separates the mat into two chambers, a first chamber and a second chamber, and is used to heat the mineral fiber mat to be heat treated while applying wind pressure to form it into a predetermined thickness. The apparatus includes: a partition wall disposed in the width direction of the conveying part in the first chamber and dividing the first chamber into a plurality of small chambers in the conveying direction; and piping for introducing high temperature pressurized gas connected to each small chamber. and a gas discharge pipe connected to the second chamber, and a gas introduction pipe installed at a position between the opening of the gas introduction pipe in each small chamber and the fiber mat transport part, and the introduced gas is directed in the width direction of the transport part. A heat treatment device for forming a mineral fiber mat, comprising: gas dispersion means for dispersing and applying uniform wind pressure in the width direction of the mat. (2) The gas dispersion means includes a perforated plate installed opposite to the conveying section, an erected side of the perforated plate opposite to the conveying section, extending in the conveying direction, and partitioned into one width direction. A heat treatment apparatus for forming a mineral fiber mat according to claim 1, comprising a partition plate defining a plurality of spaces, and a bumper installed in the spaces. (3) The heat treatment apparatus for forming a mineral fiber mat according to claim 2, wherein the perforated plate is tiltable in the width direction of the conveying section.