JPS605358Y2 - Hot air baking dryer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot air baking dryer, and more particularly to a hot air baking dryer for baking and drying a material coated by electrodeposition or the like with hot air.

Generally, various building materials subjected to electrodeposition coating, etc. are baked and dried with hot air using a hot air baking dryer at the final stage of the process.

As shown in FIG. 4, this hot air baking drying apparatus usually includes a baking drying furnace 1 for performing baking work, a hot air generating furnace 2, a filter box 18, a blower 19, and a hot air duct 10.1.
7 and a hot air circulation system 3.

In the work process, first, the hot air generating furnace 2 and the hot air circulation system are activated, and then the painted product is transferred to the crane 5.
A method is adopted in which the product is carried into the baking drying oven 1 and baked and dried with hot air for a predetermined period of time, and then the product is carried out again by the crane 5 and transported to another location.

In this case, the hot air generating furnace 2 used is one configured to automatically adjust the temperature of the hot air sent out according to the temperature of the used hot air that returns.

For example, if the temperature of the returned used hot air is low, operation is accelerated and relatively high temperature hot air is sent out;
If the temperature of the returned used hot air is high, it is heated relatively slowly and sent out.

On the other hand, in such a baking drying process, hot air is normally continuously supplied from the outside to the baking drying furnace 1 in order to bake and dry a plurality of coated products in succession in a relatively short period of time. It is now possible to do so.

For this reason, when a product as a member to be baked is carried in or out of the baking/drying oven 1, a large amount of hot air is continuously radiated outside from the corresponding baking/drying chamber of the baking/drying oven 1.

For this reason, in such conventional technology, the thermal efficiency of the entire device is very poor, and from the viewpoint of the working environment, the dissipation of hot air outside the furnace as in the past significantly deteriorates the working environment of the entire factory. This has caused the inconvenience of requiring an extremely large amount of ventilation equipment to improve the environment.

It is an object of the present invention to provide a hot air baking drying device that improves the disadvantages of the prior art, reduces heat loss in the entire device, and improves the working environment in the factory.

Therefore, the present invention provides a hot air baking drying oven having a plurality of baking drying chambers and each drying chamber having an opening/closing door, a hot air blowing path and a hot air generating furnace for sending hot air into the hot air baking drying oven, and a hot air generating furnace as described above. Hot-air baking dryer equipped with a crane device used for carrying in and out of the baking materials to each baking drying chamber, and a door control unit that controls the opening and closing of a predetermined opening/closing door of each baking drying chamber according to the operation of this crane device. In the apparatus, a first damper is installed in the hot air duct on the hot air supply side to each baking drying chamber, and a second damper is similarly installed in the hot air duct on the hot air outlet side of each baking drying chamber, A damper control section is provided that simultaneously controls opening and closing of the first and second dampers of the corresponding baking drying chamber when starting and finishing baking of the baking target member, and a damper control section is provided that controls opening and closing of the first and second dampers of the corresponding baking drying chamber, and a damper control section that controls opening and closing of the first and second dampers of the corresponding baking drying chamber is provided, and a damper control section that controls opening and closing of the first and second dampers of the corresponding baking drying chamber is provided, and a damper control section that controls opening and closing of the first and second dampers of the corresponding baking drying chamber is provided, and a damper control section that controls opening and closing of the first and second dampers of the corresponding baking drying chamber is provided, and a damper control section that controls opening and closing of the first and second dampers of the corresponding baking drying chamber is provided, and a damper control section that controls opening and closing of the first and second dampers of the corresponding baking drying chamber is provided, and a damper control section that controls opening and closing of the first and second dampers of the corresponding baking drying chamber is provided. The door control section and the damper control section are arranged so that the opening and closing operations of the door of the baking drying chamber are performed at substantially the same timing, thereby achieving the above object.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, 1 indicates a hot air baking drying oven.

Hot air is circulated and supplied to this hot air baking drying furnace 1 from a hot air generating furnace 2 via a hot air circulation system 3.

Further, a crane device 5 for moving the products 4 is installed above the hot air baking drying oven 1, and the crane device 5 is used to move the products 4 into and out of the hot air baking drying oven 1. It has become.

In this embodiment, the inside of the hot air baking drying oven 1 is divided into three parts by partition plates 6, 6, thereby forming baking drying chambers 7, 8.9.

Of these, the baking drying chamber 7 is equipped with hot air discharge lowers A, 7A and delivery lowers B, 7B connected to the hot air circulation system 3, which will be described later, at the upper and lower corners thereof. There is.

Further, at the center of the upper end of the baking drying chamber 7, there are installed doors 7E, 7E which are opened and closed by a pair of switches 7D, 7D, and the products 4 are taken in and taken out through these doors 7E, 7E.

Further, a frame locking portion 7C is provided at the lower part of the doors 7E, 7E of this baking drying chamber 7.
C, the frame body 50 on which the product is suspended is carried in by the above-mentioned crane device 5. The other baking drying chambers 8 and 9, which are locked at both ends, are constructed in exactly the same manner.

These baking drying chambers? , 8. 9 are each connected in parallel to the hot air circulation system 3.

The hot air generating furnace 2 has a function of heating air to a predetermined temperature using kerosene or gas as fuel, and sending out the heated high-temperature air to the hot air circulation system 3.

This hot air circulation system 3 has an air supply main pipe 10 and an exhaust main pipe 17, which are the main parts of the hot air blast pipe, and further includes the respective baking drying chambers. , 8. 9, air supply branch pipes 11, 12, 13 and exhaust branch pipes 14, 1 are connected in parallel as shown in the figure.
5, 16.

These air supply branch pipes 11 to 13 and exhaust branch pipe 1
4 to 16 are dampers 11A, 12A, 13 for adjusting the flow rate of hot air or blocking the flow of hot air.
A, 14A, 15A, and 16A are equipped.

Each of these dampers IIA-13A and 14A-16A
The damper control section 20 controls the opening and closing of each of the corresponding baking drying chambers 7 to 9.

Here, the air supply branch pipes 11, 12, 13 are connected to the baking drying chamber? , 8.9 are individually connected to each of the discharge lowers A, 8A, and 9A (not shown).

Also, the exhaust branch pipes 14, 15, and 16 are connected to each baking drying chamber, as shown in FIG. , 8.9 each sending lower B, 8B
, 9B, respectively.

The air supply main pipe 10 is equipped with a filter box 18 for removing dust from the circulating hot air.

The exhaust main pipe 17 also sucks the hot air after baking and drying in the hot air baking drying furnace 1 and at the same time transfers the hot air to the hot air generating furnace 2.
An RC fan 19 is installed to help circulate hot air.

The hot air circulation system 3 is configured as described above, whereby the hot air generated by the hot air generating furnace 2 is filtered to remove dust by the action of the filter box 18, and then the product 4 is placed thereon as described later. The paper is sent to a predetermined baking drying chamber (for example, 7 and 8 in the case of FIG. 1).

The hot air that contributed to the baking drying is sucked out from the baking drying chamber by the action of the RC fan 19, heated to a predetermined temperature in the hot air generating furnace 2, and then returned to the air supply main 10.
It is designed to be sent to

The crane device 5 includes a rail 21 extending horizontally in the left-right direction in FIG.

As shown in FIG. 2, two sets of crane devices 5 are installed above the hot air baking drying oven 1 so as to sandwich the hot air baking drying oven 1 therebetween.
are configured so that they can perform exactly the same operations at the same time.

A packet 23 that moves up and down is installed on the opposite side of each crane body 22, and the frame body 50 locked by this packet 23 and the product 4 suspended from the frame body 50 are transported to the hot air baking drying furnace 1. It can be moved up and down at the top.

Further, the frame main body 50 is formed such that the portion supported by the packet 23 protrudes from the side surface of the hot air baking drying oven 1 described above, and the cutting grooves IB, IB, . 1.

The crane device 5 is configured such that its operation is controlled by a crane control section 24 provided externally.

Next, the operation of each of the above-mentioned constituent members and its control system will be explained.

Now, when carrying the painted product 4 into the baking drying chamber 9,
First, upon receiving the control signal 24A from the crane control section 24, the crane main body 22 moves the product 4 onto the baking drying chamber 9.

At this time, the position signal 22A of the crane main body 22 is fed back to the crane control section 24.

When the crane body 22 reaches a predetermined position, the movement of the crane body 22 is stopped, and at the same time, the crane device 5
In response to the stop signal 22D issued from the crane control unit 24, the crane control unit 24 sends a predetermined signal 24B to the door control unit 25 and controls the drive in the direction of opening the door openers 9D, 9D. Lowering control of the packet 23 of the main body 22 is started, and as a result, the frame 50 with the product 4 hanging thereon is placed on the frame locking portion 9C of the baking drying chamber 9.

When the frame 50 with the product 4 suspended is placed on the frame locking portion 9C, the placement signal 22B is immediately sent to the crane control portion 24.

Upon receiving this, the crane control unit 24 simultaneously issues a command signal 24C to the door control unit 25 to close the switches 9D, 9D, and then to the damper control unit 20 to close the damper 13A of the air supply branch pipe 13. It is configured to issue a command signal 24D to open the damper 16A of the exhaust branch pipe 16.

As a result, the door control section 25 issues a close signal 25A to close the doors 9E, 9E, and then the damper control section 20 outputs a damper open signal 20A, thereby causing the dampers 13A, 16
A is opened at the same time, and hot air is supplied to the baking drying chamber 9.

Next, when the baking drying of the product 4 is completed, the product 4 and the frame body 50 are taken out as follows.

First, the crane main body 22 is moved above the baking drying chamber 9 by the action of the crane control section 24, and then the packet 23 is lowered to lock the frame main body 50.

During this time, the damper control unit 2.0 is energized by the crane control unit 24 to output the damper close signal 20B, and the damper 13
Drive control is performed to close At16A.

Next, when the frame body 50 is locked by the packet 23, the locking signal 22C is immediately fed back to the crane control unit 24.

As a result, the crane control section 24 controls the door control section 25.
command signal 24 to reopen the doors 9D and 9D.
B, and at the same time sends a signal 24E to the crane device 5 to instruct the lifting of the packet 23.

For this reason, door 9D. At the same time as 9D starts to open, the packet 22 starts to rise, and the frame body 50 and the product 4 are carried out from the baking drying chamber 9 and transferred to the next work process.

Thereafter, in the baking drying chamber 9, the same process as described above is repeated.

The same applies to the other baking drying chambers 7 and 8.

Is this a baking drying room? , 8.9 are operated in parallel, and the products 4 are loaded and unloaded in sequence at different timings at regular baking drying intervals.

For this reason, the hot air is constantly circulated within the hot air blowing main pipe 10.17 as a whole.

In addition, when the supply of hot air to one baking drying chamber is stopped, the RC fan 19 and the hot air generating The operation of the furnace 2 is regulated.

Further, in the hot air baking drying furnace 1 in the above embodiment, the case where the hot air passes from above to the bottom is exemplified, but the present invention is not necessarily limited to this. For example, the hot air may pass from below to the top. It may be configured to pass through.

Further, the opening/closing operation of the damper may be configured to be controlled by the damper control section 20 by being energized by the output of the door control section 25.

As described above, according to the present invention, there is provided a hot air baking drying oven having a plurality of baking drying chambers and each drying chamber having an opening/closing door, a hot air blowing path for sending hot air to the hot air baking drying oven, and a hot air generation path. A furnace, a crane device used for carrying in and out of the baking materials to each of the baking and drying chambers, and a door control unit that controls the opening and closing of a predetermined opening and closing door of each of the baking and drying chambers according to the operation of the crane device. In the hot air baking and drying apparatus, a first damper is installed in the hot air duct on the hot air supply side to each baking and drying chamber, and a second damper is installed in the hot air duct on the hot air outlet side of each baking and drying chamber. and a damper control section that simultaneously controls the opening and closing of the first and second dampers of the corresponding baking drying chamber at the start and end of baking of the baking target member, and Since the door control section and the damper control section are configured so that the opening and closing operations of the corresponding opening and closing door of the baking drying chamber are performed at approximately the same timing, when the material to be baked is taken in and out of the baking drying chamber, In this case, the first and second dampers associated with the baking drying chamber are automatically operated under the control of the damper control unit to cut off new inflow of hot air, and therefore the hot air in the baking drying chamber is unnecessarily forced into the furnace. This prevents the heat from dissipating to the outside, thereby significantly improving the overall thermal efficiency.Furthermore, as described above, the connection between the first and second dampers and the corresponding opening/closing door of the baking drying chamber Since the door control section and the damper control section are configured so that each operation is performed at approximately the same timing, the thermal efficiency of the entire device can be significantly improved without impairing the efficiency of the baking work of the baking target material. With the above structure, it is possible to provide an unprecedented hot air baking drying device that improves the working environment in the factory and also enables the reduction of the size of the ventilation system in the factory.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing an embodiment of the hot air baking dryer according to the present invention, Fig. 2 is a schematic sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 shows various parts of Fig. 1. FIG. 4 is a block diagram showing a control system for controlling operations, and is a schematic diagram showing a conventional example. 1... Hot air baking drying oven, 2... Hot air generating oven, 4... Member to be baked, 5... Crane device, 7 to 9... ...Baking drying room, 7E, 8
E, 9E...Closing door between songs, 10 to 17...Hot air duct, 20...Damper control section, 25...
...Door control section.

Claims (1)

[Scope of utility model registration request] A hot air baking drying oven having a plurality of baking drying chambers and each drying chamber having an opening/closing door, a hot air duct and a hot air generating furnace for sending hot air to the hot air baking drying oven, and a cover for each of the baking drying chambers. In the hot air baking drying apparatus, the hot air baking drying apparatus is equipped with a crane device used for carrying in and out of the baking parts, and a door control unit that controls opening and closing of a predetermined opening/closing door of each baking drying chamber according to the operation of the crane device. A first damper is installed in the hot air duct on the hot air supply side to the drying chamber, and a second damper is installed in the hot air duct on the hot air outlet side of each baking drying chamber, so that the baking of the member to be baked is A damper control unit is provided that simultaneously controls the opening and closing of the first and second dampers of the corresponding baking drying chamber at the start and end of the process, and the damper control section controls the opening and closing of each of the first and second dampers and the corresponding baking drying chamber. A hot air baking dryer characterized in that the door control section and the damper control section are configured so that each operation with the door is performed at substantially the same timing.