JPS601546B2 - Glass cotton dry heat treatment method - Google Patents

Description

[Detailed description of the invention] The present invention relates to a dry heat treatment method for glass cotton.

A dry heat treatment for bonding the fibers of glass cotton, which is useful as a heat insulating material, etc., is carried out by bringing the glass cotton into contact with hot air in a dry molding device (for example, a curing oven).

First, the conventional method will be explained based on FIG.

1 is the main body, 2A is the endless upper bump plate, and 2B is the lower bump plate, which are connected to the wheels 3A, 3A, 3.
B, 3B are wound around them and run synchronously in the same direction, and the band-shaped glass cotton 4 is moved in the direction of the arrow x while being held between the upper bump plate 2A and the lower bump plate 2B.

Further, the thickness of the glass cotton 4 is adjusted by raising and lowering the upper bump plate 2A relative to the lower bump plate 2B. The interior of the main body 1 is divided into three sections by partitions 5 and 6: a front chamber 7, an intermediate chamber 8, and a rear chamber 9. In the intermediate chamber 8, upper pressure boxes 10A, 11A and lower pressure boxes 10B, 11B are provided in the front and rear parts of the intermediate chamber 8, respectively, so as to sandwich the glass cotton 4 therebetween. Two chambers within the intermediate chamber 18 are defined as a first chamber 12 and a second chamber 13 in the glass cotton traveling direction x. 14 is a hot air generator, from which hot air is sent via a circulation fan 15 to the uppermost part of the intermediate chamber 8, the first chamber 12, and the second chamber.
Sent to room 13.

That is, the hot air sent to the uppermost part of the intermediate chamber 8 is for heating the upper bump plate 2A and the lower bump plate 2B, and a portion of the hot air leaks from the partition wall 5 and is discharged to the atmosphere by the fan 16. Although the scarlet wind from the fan 16 may be at a high enough temperature to be used for circulation, this discharged air contains fluff in the glass wire 4, so that it is impossible to use it for recirculation. The hot air sent to the first chamber 12 is sent to the fan 17
The air is pressurized and blown into the lower pressure box 10B, and taken out from the other end of the lower pressure box 10B. In this case, the lower pressure box 10
A portion of the exhaust air from B is returned into the upper pressure box 10A via the distributor 18 and fan 19. Further, the hot air in the upper pressure box 10A is returned to the mixer 201, where it is mixed with hot air from the hot air generator 14, and sent to the lower pressure box 10B by the fan 17 again. The hot air sent to the second chamber 13 is
The air is pressurized by the fan 21 and blown into the lower pressure box 11B, passes through the glass cotton 4, and is taken out from the upper pressure box 11A. At this time, a part of the exhaust air is returned to the mixer 22, where it is mixed with hot air from the hot air generator 14, and sent again to the lower pressure box 11B by the fan 21. 1st chamber 12 and 2nd chamber
After the Scarlet Wind taken out from the chamber 13 is combined, it is sent to the recirculation fan 23.
The air is returned to the hot air generator 14, where it is heated and then used for circulation. The inside of the rear chamber 9 is sucked by a fan 24 and a recirculation fan 23 to introduce outside air. Therefore, the glass cotton 4 is molded in the first chamber 12 and the second chamber 13, and the rear chamber 9
cooled down. In this way, the glass cotton 4 is molded in the first chamber 12.
The reason why the glass cotton 4 was brought into contact with hot air separately in the second chamber 13 was to increase the pressure drop when the hot air passes through the main body 1 as the glass cotton 4 progresses inside the main body 1. This is because it was thought that it was necessary to make the air blowing pressure to the first chamber 12 higher than the air blowing pressure to the first chamber 12. Based on this idea, the temperature of the mixers 20 and 22 is measured by column heating bodies 25 and 26, and the mixer inlet dampers 27 and 28 are automatically controlled based on the measurement signal, and the outlet of the circulation fan 15 is configured to automatically control the mixer inlet dampers 27 and 28. The temperature was measured by the side heating body 29 and fed back to the hot air generator 14. In the above subordinate method, the first chamber 12
Separate fans 17 and 21 and a mixer 20 are provided in the second chamber 13 and the second chamber 13.
, 22, side overflow bodies 25, 26, and automatic dampers 27, 28, the number of parts increases, the duct system becomes complicated, and the number of dampers increases. This not only complicates the control method but also is not preferable from the viewpoint of energy conservation. Therefore, the inventor
The pressure loss of hot air passing through glass cotton was investigated from various angles.

As a result, it was found that the increase in pressure loss due to the progression of glass cotton was not as much as previously thought, and the difference in pressure loss between the upper and lower sides of the main body was almost negligible, or even if there was, it was very small. I found out. The present invention has focused on this point, and an object of the present invention is to provide a method for heat treatment of glass cotton that is easy to control and preferable from the viewpoint of energy saving. In order to achieve the above object, the glass cotton drying heat treatment method of the present invention provides the upper and lower parts of the glass cotton on the upper side of the intermediate chamber of a front chamber, an intermediate chamber, and a rear chamber that are divided into three sections in the longitudinal direction of glass movement inside the main body. At the same time, the hot air in the upper part and the hot air that has passed through the glass cotton from the lower part and reached the upper part are taken out from the lower side of the upper part of the intermediate chamber as BE air, and this is passed through the hot air generator to the uppermost side of the intermediate chamber. With this configuration, the number of elements such as duct systems and fans can be reduced and control can be facilitated.

Furthermore, hot air is sent to the upper and lower parts of the glass cotton on the uppermost side of the middle of the front chamber, middle chamber, and rear chamber, which are divided into three sections in the glass cotton traveling direction inside the main body, and the hot air from the top and the glass wire from the bottom. The hot air that has passed through and reached the upper part is taken out as scarlet wind from the lower side of the upper part of the intermediate chamber, while the outside air that has passed through the glass wire by suctioning the inside of the rear chamber is taken out as 8E wind, and each of the exhaust air is Since the hot air is circulated through the hot air generator to the upper side of the intermediate chamber, it is not only possible to control the air easily, but also to minimize the amount of exhaust air emitted from the main body, thereby saving energy. It is something. below,
An embodiment of the method of the present invention will be described based on FIGS. 2 and 3.

30 is a main body, and 31 and 32 are partition plates, whereby the interior of the main body 30 is divided into three sections: a front chamber 33, an intermediate chamber 34, and a rear chamber 35.

The glass cotton 36 passes through these three chambers 33, 34, and 35 in order and advances [arrow Y]. 37A is the upper bump plate, 3
78 is a lower bump plate, these are wheels 38A,
It is inorganically wound around 38A, 38B, and 38B and runs in synchronization.

A lower pressure box 39 is provided in the intermediate chamber 34 below the glass cotton 4 and covers the entire length and width thereof. A plurality of flow regulating plates 40 are provided in the upper part of the lower pressure box 39 in the width direction. Further, an upper pressure box 41 is provided above the glass cotton 36 on the upper side of the intermediate chamber 34. Upper pressure box 4
1 and the lower pressure box 39 are connected to each other by vertically slidingly connecting the respective side ducts 41A and 39A to each other. This is to allow the upper bump plate 37A to move up and down when adjusting the thickness of the glass cotton 36. Further, a labyrinth seal 42 is provided between the upper pressure box 41 and the upper bump plate 37A, and between the lower pressure box 39 and the lower bump plate 37B.
A, 42A, 42B, and 42B are provided. 43 is a hot air generator, and the hot air generated here is driven by a variable speed motor 4.
The air is fed into the upper side (front part) of the lower pressure box 39 and into the upper pressure box 41 by a circulation fan 45 driven by the circulation fan 45 .

Therefore, a heating zone is formed in the seam portion between the upper pressure box 41 and the lower pressure box 39. Thereafter, the hot air from the upper pressure box 41 flows downward over the glass wire 36. In addition, the hot air in the lower pressure box 39 is rectified by a rectifier plate 40,
It passes through the glass cotton 36 while flowing to the lower side. Therefore, the interior of the intermediate chamber 34 excluding the heating zone becomes a molding zone. The lower side (rear part) of the intermediate chamber 34 and the hot air generator 4
3, a recirculation duct 46 is provided. Therefore, the exhaust air from the lower side of the intermediate chamber 34 is recirculated to the hot air generator 43 by the suction force of the circulation fan 45, and after being raised and lowered there, it is again sent to the upper side of the upper pressure box 41 and the lower pressure box 39. be done. The variable speed motor 44 is connected to the glass cotton 3 at the rear of the intermediate chamber 34.
A differential pressure detector 47 detects the pressure difference between the upper and lower portions of the pump 6, and the control device 48 operates based on this detection signal. Further, the outlet temperature of the fan 46 is detected by the side heating body 49, and the signal is fed back to the hot air generator 43.
Temperature controlled. 50 is a blow pipe that is opened at startup.

On the other hand, in the front chamber 33, outside air is introduced and suctioned by the fan 51 to remove fuzz and the like from the glass cotton 36. Also rear chamber 6
5 is a fan 52 that sucks in outside air while introducing it. The exhaust air is then merged into the recirculation duct 46 and introduced into the hot air generator 43. It is then fed to the heating zone. As described above, according to the method of the present invention, hot air is sent to the upper and lower parts of the glass cotton on the upper side of the intermediate chambers, which are divided into three sections in the direction of movement of the glass cotton inside the main body: a front chamber, an intermediate chamber, and a rear chamber. The hot air that has passed through the glass cotton from the lower part and reached the upper part is taken out as exhaust air from the lower side of the upper part of the intermediate chamber, and is circulated through the hot air generator to the upper side of the intermediate chamber. Control can be facilitated by reducing the number of elements such as the system and the fan, and in addition to the above configuration, the Enoki E-air sucked from inside the rear chamber is circulated to the upper side of the intermediate chamber via a hot air generator. Therefore, the amount of exhaust air emitted from the main body can be minimized and energy savings can be achieved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the conventional method, FIGS. 2 and 3 show the method of the present invention, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a sectional view taken along the line 1-1 in FIG. 30... Main body, 31, 32... Partition plate, 33...
Front chamber, 34... Middle chamber, 35... Back chamber, 36...
Glass cotton, 39... Lower pressure box, 41...
Upper pressure box, 43... hot air generator,
45, 52...Fan, 46...Circulation pipe. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1 Hot air is sent to the upper and lower parts of the glass cotton on the upper side of the intermediate chamber of a front chamber, an intermediate chamber, and a rear chamber that are divided into three sections in the glass cotton traveling direction inside the main body, and hot air is supplied to the upper part of the glass cotton. and the hot air that has passed through the glass cotton from the lower part and reached the upper part is taken out as exhaust air from the lower side of the upper part of the intermediate chamber, and is circulated to the upper side of the intermediate chamber through a hot air generator. Cotton drying heat treatment method. 2 Hot air is sent to the upper and lower parts of the glass cotton on the upper side of the intermediate chamber of the front chamber, intermediate chamber, and rear chamber, which are divided into three sections in the glass cotton traveling direction inside the main body, and the glass cotton is fed from the upper hot air and the glass cotton from the lower part. The hot air that has passed through and reached the upper part is taken out as exhaust air from the lower side of the upper part of the intermediate chamber, while the outside air that has been sucked into the rear chamber and has passed through the glass cotton is taken out as exhaust air, and each of the exhaust air is A method for drying and heat treating glass cotton, characterized in that the glass cotton is circulated to the upper side of the intermediate chamber through a generator.