JPS5849035Y2 - Plate drying equipment - Google Patents

Description

[Detailed description of the invention] This invention is based on the idea that a slit (including one with many ventilation holes) provided in a blower tube is attached to the surface of a plate-like object in a conveying state.
This relates to a device that dries a plate-shaped object by blowing out drying air from it.

In order to uniformly dry a plate-shaped body by blowing out drying air from the slit, it has conventionally been necessary to blow out the drying air uniformly over the entire area of the slit.

FIG. 1 is a sectional view showing a blower tube 1 that blows out drying air from a slit. The slit 2 that blows out drying air is provided along a cylindrical body 3, and one end 4 of the cylindrical body 3 is connected to the drying air. It is open for feeding, but the end 5 is closed.

When the inner diameter of the cylindrical body 3 and the width of the slit 2 are uniform over the entire length, the drying air sent in as shown by arrow A is blown out as shown by arrow a, and the air volume distribution becomes uneven.

Therefore, in the past, a plurality of blower tubes 1 were arranged alternately on the left and right sides to make the distribution of drying air uniform throughout the device, but one end 4 for blowing air was arranged alternately on both sides. Therefore, this requires two wind cylinders to send drying air, which has the disadvantage of making the structure complicated and large, resulting in high cost.

In order to supply drying air from one wind cylinder by aligning one end 4 of the blower tube 1 in the same direction, it is necessary to make sure that the drying air sent from one end 4 of the blower tube 1 is blown out uniformly over the entire area of the slit. It is necessary to

To do this, conventionally, as shown in Fig. 2, the inner diameter of the cylindrical body 3 is made to gradually become smaller from one end 4 to the end 5 to equalize the pressure inside the blower tube 1 and to open a slit as shown by the arrow. There was one in which the distribution of air volume blowing out from 2 was made uniform.

Although not shown, the inner diameter of the cylindrical body 3 is uniform, and the width of the slit 2 gradually decreases from the end 4 to the end 5, so that the distribution of air volume blown out from the slit 2 is uniform. There are some things.

However, it is actually difficult to manufacture the blower tube 1, which has the cylindrical body 3 and the slits 2 that adjust the distribution of wind pressure and air volume, without using plastic molding, and due to the mold cost. costs will be significantly higher.

In particular, in a blower tube used for drying a wide plate-shaped body, the cylindrical body 3
In addition, since the slit 2 becomes longer, plastics may be deformed, so it can be said that it is actually impossible.

Utility Model Publication No. 45-30149 has been proposed as a device that uses a plurality of common air blowers in which the inner diameter of the cylindrical body 3 is uniform and the width of the slit 2 is uniform to obtain a uniform air volume distribution as a whole. has been done.

This is done by providing a partition plate 6 in the middle of the cylindrical body 3 and reducing the substantial length of the slit 2, as shown in FIG. These are arranged alternately with the common blower tubes 1 shown in Figure 1, so that an approximately uniform air volume distribution as shown by curve B can be obtained as a whole.

Although the above proposal can be adopted in a device with a long drying path where a large number of blower tubes are used, it is not suitable for a device with a short drying path where only a small number of blower tubes can be used.

The purpose of the present invention is to provide a drying device that can uniformly dry a plate-shaped object while being transported, even when using a common air blower whose inner diameter and slit width are uniform over the entire length of the cylindrical body. To provide a drying device with a simple structure and low cost, which is particularly suitable for short drying paths where only a small number of blower tubes can be used.

The above-mentioned object of the present invention is to provide a plate-shaped object drying device that sends drying air from one end of a blower cylinder having a slit along the side, and blows the drying air from the slit toward the surface of the plate-shaped object in a conveyed state. This can be achieved by using a plate drying apparatus characterized in that an auxiliary air outlet is provided for blowing drying air in a direction along the surface of the plate from the drying air sending side.

Hereinafter, the present invention will be specifically explained using the embodiment shown in FIG.

Similar to FIG. 1, slits 2 opening toward the surface of the plate-like body P are provided along the cylindrical body 3 above and below the conveyance path for transporting the plate-like body P indicated by the two-dot chain line in the direction of the arrow. The blower tubes 1, 1 are arranged opposite each other, and one end 4 of each blower tube 1 is in open communication with the inside of the distribution chamber 8.

The distribution chamber 8 has an auxiliary air outlet 9 opening toward the side surface of the plate-like body P, and the distribution chamber 8 is connected to a wind cylinder 7 that sends drying air.

In the device configured in this way, the drying air from the wind cylinder 7 is distributed in the distribution chamber 8 into the flow shown by the arrow A toward each blower cylinder 1 and the flow shown by the arrow d blowing out from the auxiliary air outlet 9. The drying air sent into the cylinder 1 is blown out from each slit 2 in the direction of arrow a in the same manner as the air volume distribution shown in FIG.

The wind pressure of the drying air blown out from the auxiliary air outlet 9 decreases as the distance from the air outlet 9 increases, and the drying effect on the surface of the plate-like body P increases as it approaches the air outlet 9.

Therefore, the drying air from the auxiliary air outlet 9 acts more on the undried portions of the plate surface in areas where the amount of drying air blown out from the slits 2 is small, thereby uniformly drying the plate surface.

The opening area and position of the auxiliary ventilation opening 9 may be determined appropriately depending on factors such as the shape and length of the ventilation tube, the width and length of the slit, and the overall air volume.

In the examples, a common-shaped blower tube, that is, a tube with a uniform inner diameter and slit width, was used.
The present invention can also be used in combination with a cylindrical body whose inner diameter gradually becomes narrower toward the end, or a cylindrical body whose slit width gradually narrows closer to the end.

The auxiliary air outlet 9 is connected to the dry air blown from the auxiliary air outlet 9 so that the drying air from the slit 2 hits the plate-like body P and dries the plate-like body P to some extent, as in the above embodiment.
The inventors have experienced that a faster and more uniform drying effect can be obtained by placing the dryer in a position where it hits the dryer.

Although the present invention is a drying device as described above, it can be used even when an ordinary blower tube with a uniform inner diameter and slit width of the cylindrical body is used over the entire length, or when only one blower tube is used. This has the practical effect of being able to uniformly dry the plate-shaped body while it is being transported, and that its structure is simple and can be manufactured at low cost.

[Brief explanation of drawings]

Figures 1 to 3 are cross-sectional views of the blower tube, respectively, to explain the relationship between the shape of the cylindrical body and the amount of air blown out from the slit.
The figure is a perspective view illustrating the main parts of the drying device according to the present invention. 1...Blower tube, 2...Slit, 3.
...Cylindrical body, 4...One open end, 5.
...Occluded end, 8... Distribution chamber, 9.
...Auxiliary ventilation port, P...Plate body, D.
...Transfer direction of the plate-shaped body.

Claims (2)

[Scope of utility model registration request] (1) In a plate-shaped object drying device that sends drying air from one end of a blower cylinder having a slit along the side, and blows the drying air from the slit toward the surface of the plate-shaped object being transferred, from the drying air sending side to the A plate-like object drying device characterized by being provided with an auxiliary air outlet that blows drying air in a direction along the surface of the plate-like object. (2) Registration of a utility model characterized in that the auxiliary air outlet is provided so that drying air from the auxiliary air outlet hits the plate-shaped body in the transferred state after the drying air from the slit hits the plate-shaped body. A plate-shaped object drying apparatus according to claim 1.