JPH0633164B2 - Roof tile drying oven - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roof tile drying oven, and more particularly to a roof tile drying oven that prevents cracking, twisting, and the like of the roof tile material.

(Prior Art) Conventional roof tile drying ovens include a trolley type and a shelving type.

The trolley type has 15 to 1 drying pallets on the trolley.
After stacking about 9 steps, this trolley is passed through a drying furnace for 24 to 40 hours, during which the tile base material on the pallet is dried (Japanese Utility Model Publication No. 59-5718, etc.).

In the case of the shelf type, casters are rotatably attached to rails laid on a frame body that is shelved.
The pallet for drying is pushed and moved by a pusher or the like on this caster, and the tile base material on the pallet is dried in the meantime.

(Problems to be Solved by the Invention) However, according to the conventional truck type drying furnace, it takes a long time, for example, 15 to 20 minutes from the start of loading pallets to the end of loading on one truck, so that the upper tile tile base material is required. Since the temperature of the lower tile base material that started to be piled up earlier than that of the lower one relatively decreases, the lower tile base material easily condenses when it enters the drying furnace, and the surface of the tile base material is liable to become rough, and the tile base material becomes dry. There is a problem that cracks are likely to occur.

In addition, since the degree of progress of drying is different between the upper tile and lower tile, there is a difference in the drying conditions at the initial stage of drying, which has an important effect on “cut” and “distortion”. However, there is a problem in that there are variations in quality.

Furthermore, in a conventional shelf-type drying oven, grease deteriorates and the bearings of the casters easily stick to each other in a hot and humid atmosphere.Therefore, it is necessary to take all the pallets out of the oven in order to repair the casters to which the bearings are stuck. However, there is a problem that the repair and repair work of the casters becomes complicated.

The present invention has been made in order to solve such a problem, and adopts a shelf system to maintain the environment of pallets stacked on a shelf-shaped frame body in a relatively uniform state from the lower stage to the upper stage, An object of the present invention is to provide a drying furnace for roof tile base material, which prevents dry running of the base material, twisting of roof tiles, and the like, and is less likely to cause malfunction.

(Means for Solving the Problem) Therefore, the tile roof drying oven according to the first aspect of the present invention includes a frame body provided in a plurality of stages and a plurality of rows in a rack shape, and each stage of the frame body. And a rail laid in each row, a pallet having casters rotatably movably on the rail and mounting a tile base, and attached to the frame,
And a heater provided at a position facing the tile base material on the pallet placed on the lower frame of the frame.

The roof tile substrate drying furnace of the second invention is characterized in that stirring fans for stirring the atmosphere in the shelf and maintaining an appropriate wind speed for promoting drying are provided on both sides of the shelf frame in the furnace. .

The roof tile substrate drying furnace of the third aspect of the invention is provided outside the furnace, and blows hot air into the furnace from a supply port, and blows hot air in the furnace in a direction opposite to the traveling direction of the pallet. And an exhaust port opened on the upstream side of the blower fan.

(Operation) According to the tile roof drying oven of the present invention, when the pallet is inserted into the shelf-shaped frame body, the heater quickly heats the pallet tile roof body to prevent dew condensation on the tile roof surface, and By keeping the tile foundation from the lower stage to the upper stage of the body in a similar temperature and humidity environment, the tile substrate can be placed in a uniform environment before drying.

Further, by uniformly heating the entire surface of each roof tile with a heater, it is possible to make the degree of drying of each part in one roof tile uniform and prevent the occurrence of dry cut and distortion.

(Example) Hereinafter, the Example of this invention is described based on drawing.

As shown in FIG. 2, the drying furnace 1 comprises a furnace body 2 in one row and a furnace body 3 in two rows. The pallet put in the direction of the arrow A in the furnace has its carrying direction changed by 90 ° at the end of the furnace body 2, is put into the second furnace body 3 in two rows, and is carried out in the direction of the arrow B.

As for the hot air taken into the drying furnace, the hot air heated by the burner 5 is taken into the downstream portion of the furnace body 2 by the axial flow fan 6 and circulates in the furnace body 3 in the direction of the arrow in the figure, and then the axial flow fan 7 And is circulated in the furnace body 2 and further accelerated by the axial flow fan 8.
More discharged to the outside.

Inside the furnace body 2, as shown in FIG.
3 (13a, 13b, 13c, 13d, 13e) are shelved. Rails 12 (12b, 12c, 12d, 12e) are laid on the frame bodies 13b, 13c, 13d, 13e. The rails 12 (12b, 12c, 12d, 12e) of the respective stages of the frame bodies 13b, 13c, 13d, 13e,
The pallets 14 are placed in three rows.

Casters 15 and 16 are attached to both ends of each pallet 14 carried in from the direction of the arrow A of the furnace body 2, and a tile base 18 is placed on a support tool (not shown) on the upper surface of the pallet 14. The casters 15 and 16 are the frame bodies 13b and 13
rails 12 (12b, 12) of each stage of c, 13d, 13e
c, 12d, 12e).

And above the tile base material 18, the frame bodies 13a, 13b,
Far infrared heater (heater) 20 on the bottom surface of 13c, 13d
a, 20b, 20c, 20d are provided. In this case, since the entire surface of the tile base material is uniformly heated by the surface radiation, it is possible to prevent the occurrence of dry cutting and distortion. The far-infrared heater 20 is effective because it easily heats the core of the tile base material 18. Further, according to the present invention, the far infrared heater 20
Alternatively, a microwave heater may be used. According to the microwave heater, the rate of temperature rise is high, so that the drying can be accelerated. The bottom pallet 14 is not provided with a heater.

Stirring fans 22 and 23 are provided between the shelf-shaped frame and the side wall of the furnace body. The rotation speeds of the stirring fans 22 and 23 are set to be slower on the inlet side and faster on the outlet side. This is because the atmosphere in the shelf frame is agitated and uniformized, and at the same time, an air flow having an appropriate wind speed is formed in each drying step to promote drying. Agitating fans 22, 2
Although 3 is fixed in this case, it may be attached so as to be movable in the furnace length direction or in the vertical direction.

At the time of drying, the pallet 14 on which the tile base material is placed is sequentially stacked above the lowermost stage of the frame 13. Next, the pallet 14 is loaded into the furnace body 2 from the direction of arrow A shown in FIG. At this time, the pallets 14 are transferred while the casters 15 and 16 of the pallets 14 rotate on the rails 12.

The heater 20 provided at the furnace inlet rapidly heats the temperature of the roof tile to a wet-bulb temperature that is in equilibrium with the temperature and humidity conditions at the inlet of the drying furnace, so that dew condensation can be prevented and drying can be started earlier.

In this embodiment, the casters 15, 16 are attached to the pallet 14.
Since the casters are attached to the casters, the casters placed outside the furnace in a low-temperature and low-humidity environment other than the inside of the furnace other than during drying are less likely to malfunction. Also, caster 1
When 5 and 16 are stuck, repair and repair can be easily performed outside the furnace.

Next, the change in the water content contained in the tile base material was compared between the case where the frame was provided with a heater and the case where it was not provided.

As shown in FIG. 3, it was revealed that the water content contained in the tile base material was reduced in a short time in the example in which the heater was provided as compared with the comparative example in which the heater was not provided. In the present embodiment, the tile base 1 is heated by the heater 20 facing the upper surface of the tile base.
Since 8 is heated evenly, it is possible to shorten the drying time of the tile base material.

According to the present embodiment, the roof tile 18 is heated by the heater 20 and the warm air in the drying furnace are combined to accelerate the drying speed of the roof tile 18 and dry it even if the drying time is shortened. This has the effect of preventing breakage (cracking) and twisting of the tile base material.

The heater may be a far infrared heater, a microwave heater, or the like, and is not limited to these heaters.

(Effects of the Invention) As described above, according to the present invention, pallets with casters are incorporated in multiple stages in a shelf-shaped frame, and heating is performed by a heater from above the tile base material placed on each pallet. Therefore, since it is placed in a uniform temperature, humidity, etc. environment from the lower tile to the upper tile, it becomes easier to control the drying conditions and the dry cutting (cracking) occurs in the initial stage of drying.
It is possible to surely prevent the occurrence of the above-mentioned phenomenon, to realize uniform and quick drying, and to improve the quality of the tile base material uniformly.

Further, according to the tile roof drying oven of the present invention, since the pallet is placed outside the oven in a low temperature and low humidity environment than in the oven except during drying, the casters are less likely to malfunction,
In case of malfunction such as caster sticking, there is an effect that repair and repair can be easily performed.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a drying furnace according to an embodiment of the present invention, FIG. 2 is a schematic plan view showing the drying furnace, and FIG. 3 is a water content contained in the tile base in the embodiment of the present invention and a comparative example. It is a characteristic diagram showing the change of. 1 ... Drying oven, 12 (12b, 12c, 12d, 12e) ... Rail 13 (13a, 13b, 13c, 13d, 13e) ...
Frame, 14 ... Pallet, 15, 16 ... Casters, 20 (20a, 20b, 20c, 20d) ... Far-infrared heater (heater), 22, 23 ... Blower fan.

Claims (3)

[Claims] 1. A frame body provided in a furnace in a plurality of stages and a plurality of rows in a shelf shape, rails laid on each stage and each row of the frame body, and a caster rotatably movably on the rails. And a heater mounted on the frame body and having a pallet mounted on the pallet mounted on the lower frame of the frame and facing the tile base on the pallet. Drying furnace for tile base material. 2. The roof tile substrate drying furnace according to claim 1, wherein a stirring fan for stirring the atmosphere in the furnace is provided between the frame body and the side wall of the furnace body. 3. A blower fan provided outside the furnace for blowing warm air into the furnace from a supply port, and an upstream side of the blower fan for flowing the warm air in the furnace in a direction opposite to the traveling direction of the pallet. The roof tile substrate drying furnace according to claim 1 or 2, further comprising: