JPH0749078B2 - Radiant heat type airless dryer - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to an apparatus for continuously drying a sheet material such as cloth or synthetic resin film.

[Prior art]

Conventionally, this type of drying device is provided with a plurality of guide rollers on the inner surfaces of the front and rear side walls of the casing in multiple stages, and a sheet-like material such as cloth or synthetic resin film is wound around the guide rollers to run in a staggered manner. In addition, a sheet-like object in which a heater using an electric heater or steam as a heat source is provided in a circulation path that circulates the air in the casing through a blower and a duct, and the hot air of the heater causes the guide rollers to run in a staggered manner. There is known a hot-air type drying device adapted to dry the.

[Problems to be Solved by the Invention]

In the above conventional hot-air drying device, first, since the guide roller for guiding the sheet-like material is housed in the casing, the casing itself becomes considerably large. As a result, not only the entire apparatus becomes large, but also the heater must be expensive with a large capacity in order to raise the temperature inside the large-capacity casing, and the initial cost and running cost also become expensive. There was a problem of being lost. In addition, since the size of the entire apparatus is increased, there is a problem that heat is largely dissipated from the peripheral side wall and heat loss is large. Next, a circulation device including a blower and a duct for circulating the air in the casing must be provided, which not only complicates the structure but also increases the initial cost and the running cost. There was a problem. In addition, there is a problem that the sheet-like material is easily twisted and twisted by the hot air circulating in the casing, and wrinkles are easily generated. Furthermore, for example, when the cloth impregnated with a chemical such as a dye is dried, even if the surface temperature of the guide roller becomes 130 ° C to 150 ° C by heating the heater at 130 ° C to 150 ° C, the temperature of the cloth is Latent heat of vaporization of chemicals, etc. rises only about 60 ℃ ~ 70 ℃, and when the low temperature cloth containing this chemical touches the surface of the high temperature guide roller, the surface of the cloth is ironed as if it was ironed. There was a problem that it was dried and dried, and the finish was flat with the texture being impaired. Therefore, as shown in Japanese Utility Model Publication No. 52-12210, hot plates are arranged on both sides of a fabric running in a zigzag pattern in the casing, and the fabric is heated and dried by radiant heat from the hot plate. However, even when such a low temperature cloth containing a chemical solution contacts the surface of the high temperature guide roller, the chemical solution adheres to the surface of the guide roller and is immediately dried. There is a problem similar to the conventional one that the scale is easily deposited. For this reason, in this type of drying device, the scale adhering to the surface of the guide roller is regularly removed.In that case, the temperature inside the casing becomes high due to steam and heat immediately after the drying device is stopped. In addition, there is a problem that the work environment is narrow and the scale removal work is extremely inefficient. In addition, it takes a considerable amount of time for the temperature inside the casing to drop sufficiently so that workers can put it inside the casing, and the drying device must be stopped during that time, which greatly increases operating efficiency. There was also a problem that it would decrease to. Further, as shown in Japanese Patent Laid-Open No. 63-259375, a radiation panel is confronted, or clothes are arranged between wall heaters that generate far infrared rays as shown in Japanese Utility Model Laid-Open No. 64-43897. As shown in Japanese Utility Model Publication No. Sho 55-46958, a plurality of guide rollers are vertically arranged in a drying chamber, and a plurality of hot plates are vertically arranged side by side to form a sheet shape between the hot plates. It is known that the articles are made to run and dry, but in the above publications, the hot air containing a large amount of moisture in the drying chamber is circulated, so that the drying efficiency cannot be sufficiently improved. There was a problem to say. The present invention has been proposed in view of the above problems, and prevents the temperature of the guide roller that guides the sheet-like object from rising and prevents the ironing action of the surface of the high-temperature guide roller and prevents the scale of the scale from being applied to the surface of the guide roller. Accumulation is prevented as much as possible, and even if scale is accumulated, it can be removed easily within a short time, and the down time can be shortened to improve the operating rate and drying efficiency of the drying device. That is the purpose.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the radiant heat type airless drying apparatus according to the present invention is a box-shaped casing having front and rear side walls provided with inlets and outlets of sheet-like material at predetermined intervals, and front and rear side walls of the casing. Guide rollers are arranged between the entrances and exits on the outer surface of the sheet, the sheet-like material is wound around each guide roller, and heating means is provided in the space between the sheet-like materials passing through the casing and The means is a heating element, a far infrared ray emitting member provided on one side surface of the heating element, a reflecting member provided on the other side surface of the heating element, suction ports opened on the left and right side wall portions of the casing, and inside the casing from the suction port. It is characterized in that it is formed with a ventilation device that sucks hot air containing the above-mentioned moisture to ventilate it.

[Action]

First, in this radiant heat type airless drying device, each guide roller for guiding the sheet-like material is exposed to the outside of the casing, and is prevented from being heated by the heating means inside the casing and rising in temperature. Further, the sheet-like material such as the cloth supplied to the radiant heat type airless drying device is heated by the heating means while the guide roller is wound in a zigzag manner. At this time, the far-infrared rays emitted from the far-infrared radiation member are sufficiently heated to the inside of the sheet by the long wavelength, and the far-infrared rays transmitted through the sheet are reflected by the other side surface of the heating element. The sheet-like material is heated again after being reflected by the member. In addition to this, when the guide roller is wound in a zigzag manner, the front and back of the sheet-like material are alternately heated by the heating means, so that the sheet-like material is uniformly dried. Next, since it is difficult for the scale of the surface of the guide rollers to heat up, it is difficult for scale to adhere to the surface.However, when gradually removing the scale that has adhered to the surface due to aging, each guide roller is exposed to the outside of the casing. Because of the low temperature, the worker can immediately perform scale removal work from the outside. Further, the moisture evaporated from the sheet-like material such as cloth is sucked and ventilated by the ventilation device from the suction port formed on the side wall of the casing, so that the inside of the casing is maintained in a high drying efficiency. Furthermore, since the outside air is sucked into the front and rear side walls of the casing from the inlet / outlet of the sheet-like object when being sucked from the suction port by the ventilation device and ventilated, heat inside the casing does not leak to the outside from the inlet / outlet. Since the guide roller is arranged outside the casing, a sheet-like material such as cloth, which has been sufficiently heated by the heating element and the reflecting member, goes out of the inlet / outlet at a low temperature and low humidity. The evaporation of water is further promoted by the temperature difference and the like.

【Example】

An embodiment of the radiant heat type non-air drying device of the present invention will be described below by taking as an example the case of being incorporated in a fabric dyeing / arranging / finishing machine for use. FIG. 1 is a vertical sectional side view of a radiant heat type airless drying apparatus of the present invention,
FIG. 2 is a vertical sectional front view thereof, in which reference numeral 1 generally indicates a radiant heat type airless drying device. This radiant heat type non-drying device 1 includes a casing 2 formed of a plate-shaped heat insulating material in a box shape, and a plurality of cloth inlets and outlets (sheet-like material) formed on the front and rear side walls 2a and 2b at predetermined intervals. Doors 3), 3 ..., and the guide rollers 4 ... 4 installed between the adjoining fabric doors 3 ... 3 ... and the inside of the casing 2. It is provided with a plurality of heating means 5 and a ventilation device 6 for ventilating the inside of the casing 2. The fabric entrances 3, 3, 3, ... Are formed by forming elongated slits on the front and rear side walls 2a, 2b of the casing 2. The guide rollers 4 ・ 4 ・ 4 ... are the cloth doorways 3 ・ 3 ・ 3
The both ends of which are rotatably supported by the side walls 2a and 2b through bearings 7, 7 and 7 between the side walls 2a and 2b, and the cloth 8 impregnated with the chemical solution in the dyeing process (not shown) is Each fabric doorway 3
-The windings are wound in a zigzag pattern from 3 ... to the guide rollers 4 ... 4 ... The heating means 5 are respectively disposed in the space between the fabrics 8 running in the inner space of the casing 2, and as shown in FIG. 3, a plate-shaped heating element 9 using steam as a heat source and a heating element. A far-infrared radiation surface 11 on which a far-infrared radiation member 10 made of a ceramic that emits far-infrared radiation, for example, a silicon carbide-mullite composite material is applied to one side surface 9a of the body 9 and the other side surface 9b of the plate-shaped heating element 9 are provided. And a mirror surface (reflection member) 14 attached. In addition, the ventilation device 6 uses the suction force of the suction blower 12 provided on the top plate 2c of the casing 2 through the duct 13 to cause the casing 2 to move.
It is formed so that the hot air containing the moisture of the casing 2 is discharged to the outside from the suction ports 15 formed in the left and right side walls 2d and 2e. Reference numeral 16 in the drawing is a safety cover for covering the guide rollers 4, 4, 4, ... Provided on the outer surfaces of the side walls 2a, 2b of the casing 2. The operation of the radiant heat type airless drying device 1 configured as described above will be described below. First, the cloth 8 impregnated with a chemical solution in a dyeing process or the like (not shown in the figure) is guided from the cloth entrances / exits 3/3 ...
4 ... is wound in a zigzag pattern and is heated by far infrared rays having a long wavelength emitted from the far infrared ray emitting surface 11 of the heating means 5 when passing through the casing 2. At this time, the far infrared rays emitted from the far infrared ray emitting surface 11 of the heating means 5 sufficiently heats the inside of the fabric 8 due to its long wavelength, and the far infrared rays transmitted through the fabric 8 are reflected by the mirror surface (reflection member) 14. Then, the cloth 8 is irradiated again to heat the cloth 8. In addition to this, when the guide roller is wound in a zigzag manner, the front and back of the sheet-like material are alternately heated by the heating means 5, so that the sheet-like material is uniformly dried. Further, the hot air containing the moisture in the casing 2 is discharged to the outside through the duct 13 by the suction force of the suction blower 12 by the operation of the ventilation device 6. Here, the guide rollers 4, 4, 4 ... Are attached to the respective side walls 2a, 2b.
Is rotatably supported on the outer surface of the fabric, and it is difficult for the temperature to rise, and due to the negative pressure in the casing 2, each fabric door 3.3.3.
.. Guide rollers 4 ・ 4 ・ 4 ・ ・ by outside air sucked from
・ Coupled with cooling, the guide rollers 4 ・ 4 ・ 4 ・
.. is prevented from rising in temperature. In this way, since it is possible to prevent the temperature rise of the guide rollers 4, 4, ...
Even when removing scale attached to the surface of, the operator can immediately perform scale removal work from the outside. In the above embodiment, the radiant heat type non-drying device is described as an example in which the chemical liquid impregnated in the cloth is dried in the dyeing step, but it can be used by being incorporated in other cloth dyeing / arranging / finishing machines. Needless to say, it can be used as a drying device for a sheet-like material such as a synthetic resin sheet. Further, in the above embodiment, a plate-shaped heating element whose heating means uses steam as a heat source, a far-infrared radiation surface coated with a far-infrared radiation member such as ceramic that radiates far-infrared radiation on one side of the heating element, and a plate-shaped The heating element is configured to have a mirror surface adhered to the other side, and the heating element is an electric heater using a heating wire such as a sheath wire as a heat source or an oil heater using oil as a heat source. It goes without saying that you can do it.

【The invention's effect】

As described above, the radiant heat type airless drying apparatus according to the present invention has a far-infrared radiating surface coated with a far-infrared radiating member such as a ceramic radiating far-infrared radiating heating means on one side of a heating element, and a plate-like shape. It is configured with a mirror surface attached to the other side of the heating element, and the inside of the casing is heated and dried in a windless state with only natural convection, so even thin delicate sheet-shaped materials can be dried by conventional methods. As described above, it is possible to perform uniform and excellent drying without twisting or wrinkling of the sheet-like material due to hot air. Further, the guide roller for guiding the sheet-like material is disposed on the outer surface of the casing, and the casing can be made much smaller than the conventional one or the prior invention in which the guide roller is provided inside the casing. Can be done. Since the drying device can be significantly downsized, the surplus space in the casing is small, and most of the heat of the heating means can be effectively used for heating the sheet-like material, and the heating means has a small capacity and is inexpensive. There is also an advantage that the initial cost and the running cost can be significantly reduced. Furthermore, if the casing can be made smaller, there is an advantage in that the heat dissipation from the peripheral side wall of the casing can be extremely reduced accordingly, and the heat loss can be reduced to contribute to energy saving. In addition, since the guide roller is arranged outside the casing, the temperature of the guide roller hardly rises during the operation of the drying device, and the scale is less likely to adhere to the peripheral surface of the guide roller.
If you regularly remove the scale that has gradually adhered after many years of use, do not wait for the guide rollers and the surrounding ambient temperature to cool sufficiently as in the past, and immediately remove the scale from the outside of the dryer. It has a number of advantages that it can be performed in a wide area, the efficiency of scale removal work can be improved, and the operating time can be improved by greatly shortening the down time of the drying device. The heating means for heating the sheet-like object is heated by far-infrared rays having a long wavelength emitted from the far-infrared emitting member, and the far-infrared ray transmitted through the sheet-like object is reflected by the reflecting member to be re-formed into the sheet-like shape. Since the object is heated, far infrared rays can be effectively used without exhaustion, so the heating means can be made small, and the drying device can be made more compact accordingly. There is also an advantage that it can be done. Further, the moisture evaporated from the sheet-like material such as cloth is sucked and ventilated by the ventilation device from the suction port formed on the side wall of the casing, so that the inside of the casing is maintained at a high drying efficiency and at the same time by the ventilation device. When the air is sucked from the suction port and ventilated, the outside air is sucked into the front and rear side walls of the casing from the inlet and outlet of the sheet-like material, so that the heat inside the casing does not leak to the outside from the inlet and outlet, and the guide roller Since it is arranged outside of the sheet, the sheet-like material such as the cloth, which has been sufficiently heated by the heating element and the reflecting member, goes out of the doorway at low temperature and low humidity. Further, evaporation of water is promoted. This has the advantage that the drying efficiency of the drying device can be greatly improved.

[Brief description of drawings]

The drawings show an embodiment of a radiant heat type airless drying apparatus according to the present invention. FIG. 1 is a vertical sectional side view of a continuous drying apparatus for a fabric used by being incorporated in a dyeing / arranging / finishing machine, and FIG. Is a vertical sectional front view thereof, and FIG. 3 is a sectional view of a heating means portion. 1 ... Drying device, 2 ... Casing, 4 ... Guide roller, 5 ... Heating means, 8 ... Sheet-like material (cloth), 9 ...
… Heating element, 10 …… Far infrared radiation member, 14 …… Reflecting member.

Claims (1)

[Claims] 1. A box-shaped casing is provided with entrances and exits of sheet-like objects at front and rear side walls at predetermined intervals, and guide rollers are provided between the entrances and exits on outer surfaces of front and rear side walls of the casing. Then, the sheet-like material is wound around each guide roller, and heating means is provided in the space between the sheet-like materials passing through the casing, and the heating means is provided on the heating element and one side surface of the heating element. Ventilation to suck and ventilate hot air containing moisture inside the casing from the far-infrared radiation member, the reflection member provided on the other side of the heating element, the suction ports opened on the left and right side walls of the casing, and the suction port. A radiant heat type airless drying device characterized by being formed with a device.