JPS5841431B2 - conveyor belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the drying of breathable sheet-like materials such as paper, cloth, and textiles. We would like to provide a forced ventilation dehumidification drying device for sheet-like materials, which achieves uniform drying by uniformly suctioning and ventilation, eliminates shrinkage and wrinkles of materials, and increases air circulation to improve quality. It is something to do.

Conventionally, as a device for drying this type of sheet material,
The sheet-like material is conveyed by placing and conveying the material on a belt conveyor, or by winding and running the material on a large number of drive rolls forming a large circular arc, and then using a dient nozzle on the surface of the sheet-like material. There are jet dryers that dry by jetting hot air, and multi-cylindrical dryers that dry the material by winding it around the outer surface of a large number of arrays with high-temperature steam guided inside and transporting them. It is widely practiced (for example, Drying Equipment Manual, published by Nikkan Kogyo Shimbun, p. 35).

However, when high-temperature hot air is injected onto the material surface,
Only the front side of the material dries quickly, creating uneven drying between it and the back side, which can cause the material to shrink, wrinkle, or even tear if the material is weak like paper. there were.

On the other hand, when drying the material by wrapping it around a cylindrical metal surface heated to a high temperature, the surface of the material is in direct contact with the hot metal surface, so only the surface dries rapidly, resulting in the same problem as above. was occurring.

In addition, drying using these methods heats the surface of the material itself to high temperatures, which impairs air circulation and may cause discoloration, resulting in a significant deterioration in quality.

The present invention eliminates the conventional method of forcibly blowing high-temperature hot air onto the material surface or directly contacting it with a high-temperature cylinder, and instead dries it by bringing it into contact with low-temperature (room temperature) dry air. In addition, the above-mentioned problems caused by conventional drying are attempted to be solved by drying by permeating room-temperature air into the interior between the fiber structures.

The dehumidifying dryer used in the present invention is already known from, for example, Japanese Utility Model Publication No. 42-700 and Japanese Patent Application Laid-open No. 49-41506, but both of them are implemented simply as a generator of dehumidified air. However, in the present invention, this technology is further developed and applied to drying sheet-like materials.

Embodiments of the present invention will be described below based on illustrative drawings.

Numeral 1 is a net conveyor, which is disposed within the closed drying chamber 2, and is driven by belt pulleys 3.3' and 4.4', and has a net conveyor 6.

The net conveyor 1 may be configured to be driven by a chain in addition to the belt pulleys 3 and 4.

The belt 5 of the net conveyor 1 consists of guide rails 1 and 11 made of L-shaped frame bodies and side plates 8 and 8 that are in contact with the guide rails from the outside.
', and an intake port 9 is provided at an appropriate location on at least one of the side plates 8', thereby allowing the belt 5 and the left and right side plates 8,
8' forms a fourfold space 10.

Reference numeral 11 denotes a detachable member made of a plate that comes into contact with the mesh 6 of the belt 5 at the end of the return path of the net conveyor 1, and is attached so as to cross the mesh 6 of the belt 5. .

On the other hand, 12 is a dehumidifying dryer installed in the sealed drying chamber 2, in which a compressor 13, an auxiliary condenser 14, a condenser 15, a refrigerant receiver 16, and an evaporator 17 are successively connected to circulate the refrigerant. The evaporator 1T, the condenser 15, and the blower 18 are sequentially installed inside a box-shaped casing having a suction port 20 at the bottom and a blower port 19 at the top. The air sucked from the suction port 20 by the evaporator 11 is cooled and dehumidified by the evaporator 11, and further heated by the condenser 15, and the air is converted into dry air and blown out from the ventilation port 19.

The air outlet 19 of the dehumidifying dryer 12 is communicated with the inside of the sealed drying chamber 2, and its suction port 20 is communicated with the air inlet 9 of the side plate 8' via a duct 21.

As shown in Fig. 2, the dehumidifying dryer 12 may be installed inside the closed drying chamber 2 or outside, but if it is installed outside, the dehumidifying dryer 12 is connected to the closed drying chamber via a separate duct. The chamber 2 and the ventilation port 19 are communicated with each other.

To explain the operation based on the above configuration, when the sheet-like material 22 is supplied to the transfer start point of the net conveyor 1, the soot-like material 22 is transferred to the air blower 1 of the dehumidifying dryer 12.
Due to the suction action from the suction port 20 by the belt 5
It is attracted to the mesh 6 of FIG.
It is sent to the left in the figure.

Then, by the action of the detachment member 110 at the final end,
Since the suction effect is blocked, it is only in this position that the sheet-like material 22 leaves the belt 5 and is wound downwardly via the sagging guide roller 23 in the winder 24.

On the other hand, the dry air that exits the air outlet 19 of the dehumidifying dryer 12 is sent into the closed drying chamber 2, and is sent to the belt 5 of the net conveyor 1.
While forcibly ventilating the inside of the fiber structure of the sheet-like material 22 adsorbed on the air, moisture is simultaneously stirred up and becomes high-humidity air, which passes through the mesh 6, passes through the space 10, and passes through the suction port 9 of the side plate 8'. The air then reaches the suction port 20 from the duct 21, is further cooled and dehumidified by the evaporator 11 of the dehumidifying dryer 12, is heated by the condenser 15, becomes dry air with low relative humidity again, and is sealed by the blower 18. It is sent into the drying chamber 2.

The set temperature of the air in the sealed drying chamber 2 varies depending on the type of refrigerant in the refrigeration cycle, but when the Freon 22 is used, it can be set and controlled to any temperature within the range of approximately 20 to 50°C.

In summary, the present invention provides an evaporator 17, a condenser 1,
5 and a blower 18 are installed in order, and the air sucked from the suction port 20 by the blower 18 is cooled and dehumidified by the evaporator 17, and then heated by the condenser 15 and converted into dry air.
The air outlet 19 of the dehumidifying dryer 12, which blows air from the air outlet 9, is communicated with the airtight drying chamber 2, and a net conveyor 1 having a mesh 6 is disposed inside the airtight drying chamber 2, so that both sides thereof are The dehumidifying dryer 1 is surrounded by side plates 8 and 81, and an inlet 9 is provided on at least one of them, and this inlet 9 is communicated with the inlet 20 of the dehumidifying dryer 12.
The ventilation port 19 and the suction port 20 of No. 2 are communicated with each other.
It is characterized in that the entire amount of dehumidified dry air leaving the net conveyor 1 passes through the mesh 6 of the net conveyor 1 and is sucked into the suction port 20.

Therefore, the entire amount of room-temperature dry air that exits the dehumidifying dryer 12 passes through the inside of the fiber structure from the surface of the sheet-like material 22, exits to the back side and is ventilated, and then is sucked into the dehumidifying dryer 12 and broken. Dry air at room temperature is evenly distributed and permeated throughout the fiber structure, so there is no uneven drying.
It dries evenly.

Since it is brought into contact with room temperature air, the finish is soft and the airflow is improved.

Therefore, there is no material shrinkage or wrinkles.

Since drying is performed at room temperature, there is no need to cool the material using cold air during post-processing, unlike in high-temperature drying, and there is no generation of static electricity.

It can be said that this is an industrially useful device, as it can produce products of far superior quality compared to conventional high-temperature drying devices.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being an overall front view and FIG. 2 being a partial vertical side view. 1...net conveyor, 2...closed drying room, 6...piece, 8, 81...side plate, 9...intake port , 12... Humidity dryer,
15... Condenser, 17... Evaporator, 18...
...Blower, 19...Bent vent, 20...
...Suction port.

Claims (1)

[Claims] 1. An evaporator 17, a condenser 15, and an air blower 18 are sequentially installed in a casing having a suction port 20 at the bottom and an air blowing port 19 at the top. The air outlet 19 of the dehumidifying dryer 12 is cooled and dehumidified at 17, then heated at the condenser 15, and converted into dry air, which is blown out from the air outlet 19 and communicated with the inside of the closed drying chamber 2. There is a mesh 6 inside the airtight drying chamber 2.
A net conveyor 1 is provided, its both sides are surrounded by side plates 8, 8', and at least one of the net conveyors 1 is provided with an intake port 9, and this intake port 9 is communicated with the intake port 20 of the dehumidifying dryer 12. This allows communication between the air outlet 19 and the suction port 200 of the dehumidifying dryer 12, so that the entire amount of dehumidified dry air leaving the air outlet 19 passes through the mesh 6 of the net conveyor 1 and is sucked into the suction port 20. A forced ventilation dehumidifying drying device for sheet-like materials, characterized by comprising: