JPH03291488A - Hot air drier - Google Patents

Abstract

PURPOSE:To dry an object to be treated evenly by arranging a hot air injection hole and an opening of a hot air recovery path with the other end thereof to the outside on a surface as opposed to the object to be treated of hot air ducts which are provided separately above and below a running path of the object to be treated. CONSTITUTION:A housing 10 of a drier 4 is separated into upper and lower parts 14 and 16 with a running path of an object A to be treated as dividing line and ducts 24 and 26 are mounted in the housing 10 respectively. A number of injection ports 50 and a hot air recovery hole are arranged in the ducts 24 and 26 at a specified interval. A circulation fan 30 provided below the housing 10 blows a hot air to the object A to be treated from the injection holes 50 of the ducts 24 and 26 through a burner 28 and a part thereof is discharged outside via the air hot recovery pipe 54 and a filter 32. As a result, the hot air jetted hits the object to be treated uniformly from the many injection ports 50 without being blocked by the hot air already jetted thereby achieving even drying.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Separator] The present invention relates to a hot air drying apparatus for drying a workpiece such as a fabric using hot air.

[Prior Art] As an apparatus for drying a workpiece such as a fabric, hot air outlets are provided inside the housing of the apparatus above and below the workpiece that is run by an endless tenter chain. There is.

This drying device runs the object to be processed in the same direction using the tenter chain, and
The object to be processed is dried by jetting hot air from the outlet.

In the hot air injection type drying processing apparatus such as No. 2, studies have been made in the past on how to efficiently inject hot air, such as research on the shape of the air outlet. However, the reality is that the fate of the hot air after it is injected is not considered a problem.

In conventional hot air spray type drying apparatuses, hot air remains around the object to be treated forever after being sprayed. This hot air then forms an air layer above and below the object to be treated. Therefore, the subsequently jetted hot air is prevented from impinging on the workpiece by this layer of air. As a result, there is a problem that the hot air is uniformly applied to the object to be treated and that the drying of the object to be treated is uneven.

[Problems to be Solved by the Invention] Therefore, the following measures were taken to solve the above problems.

In the present invention, a long workpiece such as a cloth is moved inside a housing in the front and back direction of the housing, and hot air is blown onto the workpiece from above and below the moving workpiece. In a hot air drying device for drying a processed material, ducts leading to a hot air blower are disposed above and below the travel path of the processed material, and each duct has a hot air blower on a surface facing the processed material. A hole is provided, one end is open on the surface facing the object to be treated, and the other end is provided with a hot air recovery path that is open so as to communicate with the outside of the duct.

[Function] Hot air is taken into the duct from the blower. This hot air is ejected from hot air injection holes provided on the surface of the duct facing the object to be treated.

The jetted hot air collides with the object to be treated and dries it. Thereafter, the hot air enters a hot air recovery path communicating with the outside of the duct and is quickly recovered.

Therefore, the hot air that is injected does not stay around the object to be treated forever, and the hot air that is continuously injected is
Evenly hits the entire surface of the object to be treated. Thereby, the object to be processed can be dried evenly.

[Example code] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 4 shows a processing apparatus for processing a workpiece A such as a fabric. This processing machine is comprised of an automatic cloth passing device 1, a pinning device 2, a heat treatment device 3 using a far-infrared heater, a hot air drying device 4, a cooling device 5, and a drawing device 6 for the material to be processed A.

The present invention relates to the hot air drying device 4 among the above.

In FIG. 1, reference numeral 10 denotes a housing of the hot air drying device 4, which is formed into a hollow rectangular parallelepiped by a heat insulating material 12. The housing 10 has an upper part 14 on the upper side of the traveling path and a lower part 1 on the lower side, with the traveling path of the object A as the boundary.
6. The upper part 14 can be connected to and separated from the lower part 16 by means of hydraulic cylinders 18 arranged in front and behind.

Further, at the abutting portion between the upper part 14 and the lower part 16, an opening 20 is formed on the front surface of the housing 1O, and an outlet 22 is formed on the rear surface. Further, the workpiece A carried in from the entrance 20 travels inside the housing 10 by endless tenter chains (not shown) provided on both the left and right sides across the travel path of the workpiece A, and then reaches the exit. 22.

Ducts 24 and 26 are arranged vertically symmetrically with the traveling path of the object A as a boundary. The upper duct 24 is attached to the upper part 4 of the housing 10, and the lower duct 26 is attached to the lower part of the housing 10. others,
A detailed description of the ducts 24, 26 will be given later.

28 is a burner 28 provided below the Haussink River 0, and is a heat source in the hot air drying device 4.

Reference numeral 30 denotes a circulation fan close to the burner 28, which converts the heat generated by the burner 28 into hot air and can send this hot air into the ducts 24 and 26.

32 is a filter provided below the duct 24.26. Solid particles such as dust contained in the hot air collected after drying the fabric are adsorbed and removed here, and fresh air is supplied to the circulation fan 30 again. Also, 34
is an exhaust port that communicates with the outside; a portion of the recovered hot air is exhausted from the exhaust port 34, and fresh air is drawn into the housing 10 from the intake port 36 instead.

FIG. 2 is a diagram showing the lower duct 24 of the ducts 24 and 26 installed above and below the traveling path of the object to be processed A. As shown in FIG. The duct 24 is formed in the shape of a rectangular parallelepiped, with the front surface serving as a hot air inlet 42 and the rear surface serving as a hot air outlet 44.
It becomes. As shown in the figure, on the surface 46 of the duct 24 facing the workpiece A, there are a large number of jetting holes 50 with a diameter of about 10 mm and hot air recovery holes 48 with a diameter of about 100 srs, respectively, at predetermined intervals. It's opened. Further, inside the duct 24, a partition plate 52 is provided from the lower end of the air inlet 42 to the upper end of the discharge port 44, dividing the interior space into two. As a result, the speed of hot air ejected from all the ejection holes 50 on the opposing surface 46 becomes uniform.

The partition plate 52 has a collection hole 4 formed on the opposing surface 46.
8, a recovery hole 48- is provided at a position extending in a direction perpendicular to the opposing surface 46.

Further, between the opposing surface 46 and the partition plate 52, a recovery pipe 54 serving as a hot air recovery path is connected from the recovery hole 48 to the recovery hole 48.
Further, 55 is a recovery chamber, and the air that has passed through the recovery pipe 54 of the duct 24 or 26 on one side joins here.

(See Figure 3).

The operating state of the hot air drying device 4 having the above configuration will be explained below.

A long object A to be processed containing moisture, resin, etc. is caused to run inside the housing 10 by the tinter chain.

At the same time, the burner 28 and the circulation fan 30 are activated to blow hot air through the inlet 42 of the duct 24,26. The hot air that has entered the duct 24.26 is ejected from the ejection holes 50 provided on the opposing surface 46 of the duct 24.26. The jetted hot air hits the object A and dries it. The hot air after drying the object A is pressed by the hot air that continues to blow out, and quickly enters the recovery pipe 54 communicating with the outside of the duct 24, 26 as recovery air. The recovered air that has entered the recovery pipe 54 flows out into the recovery chamber 55, where it is turned backward and passes through the exhaust port 4.
Go out from 4. The air collected from below the duct 24 and the air collected from above the duct 26 join together at the rear of the housing 10, some of which is discharged from the exhaust port 34, and the rest of which passes through the filter 32. The air that has passed through the filter 32 is taken into the circulation fan 30 again as fresh air. In this way, recovery and circulation of the hot air after injection is effectively carried out.

With the hot air drying device 4 having the above configuration, the hot air injected from the jet holes 50, after hitting the object to be treated A, is quickly recovered without staying around the object to be treated forever. As a result, the hot air hits the object uniformly, and the object can be dried unevenly.

Note that a part of the plurality of recovery pipes 54 may be extended to the outside of the duct 24 or the duct 26, and a temperature sensor may be provided near the outlet thereof.

This makes it easier to control the temperature of the hot air for the object A to be processed.

Further, in this embodiment, the burner 28, the circulation fan 30, and the filter 32 are provided below the housing 10, but they may also be provided above the housing 10.

All other embodiments that fall within the scope of the claims or are within the scope of this invention.

[Effects of the Invention] Since the present embodiment is configured as described above, the hot air blown out from inside the duct evenly hits the object to be treated. and,
After hitting the object to be treated, this hot air is taken into the hot air recovery path and promptly recovered outside the duct. Thereby, the hot air that is blown out is not interfered with by the hot air that has already blown out, and the object to be treated, such as fabric, can be dried unevenly.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of the inside of a housing showing an embodiment of the present invention, FIG. 2 is a perspective view of the lower duct, FIG. 3 is a cross-sectional view of the main part of the duct, and FIG. It is a side view of a heat treatment machine. [Symbol A...Product to be treated, 4...Hot air dryer, 24...Duct (lower side) 42...Blowing port, 46...Opposing surface, 50...Blowout hole, Explanation code DESCRIPTION OF SYMBOLS 10...Housing, 26...Duct (upper side) 44...Discharge port, 48.48-...Recovery hole, 54...Recovery pipe.

Claims (1)

[Claims] 1. A long object to be processed, such as a cloth, is moved inside the housing in the front-rear direction of the housing, and hot air is blown onto the object from above and below the moving object. In a hot air drying device that dries objects to be processed by blowing air, ducts leading to the hot air blower are arranged above and below the travel path of the objects to be processed, and each duct has a duct facing the object to be processed. A hot air injection hole is provided on the surface, and a hot air recovery path is provided with one end opening on the surface facing the object to be treated and the other end opening to communicate with the outside of the duct. Hot air drying equipment.