JPS5933997Y2 - Drying oven in surface treatment equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drying oven for surface treatment equipment for plating, alumite, painting, etc.

Conventionally, drying ovens have an automatic opening/closing lid on the loading inlet side, such as a mounting carrier bar that suspends the workpieces that have been processed in the final treatment tank of the surface treatment equipment, and a lid that opens and closes automatically on the loading port side to carry the workpieces in the final treatment tank of the surface treatment equipment. There is an automatic opening/closing lid on the loading/unloading port side for carrying out the finished mounted carrier bar, and since both of the automatic opening/closing lids are left in the open masonry during loading and unloading, the drying hot air inside the furnace is rapidly released. Not only does this have a negative impact on the workpiece due to a drop in the temperature inside the furnace and uneven temperature distribution within the furnace, but also the thermal energy used for drying hot air, i.e. heavy oil, light oil, gas, electricity, etc. There were drawbacks that resulted in huge losses.

The purpose of this invention is to improve this problem, and when the automatic opening/closing lid is opened, the blower rotates to blow the hot air inside the furnace or the heated air from the hot air generating furnace to the blower installed at the entrance and the side of the exit. By ejecting water horizontally from the outlet over the entire surface of the loading and unloading ports to isolate the inside of the furnace from the outside, it is possible to prevent the loss of thermal energy inside the furnace when the automatic opening/closing lids are opened, and when drying the processed material. This is to ensure a uniform temperature distribution within the furnace.

Hereinafter, the present invention will be explained based on the embodiments shown in FIG. 1 (partial vertical side view of the drying oven) and FIG. 2 (enlarged side view for explaining the automatic opening/closing means of the opening/closing lid).

In this embodiment, the blower is rotated intermittently to blow out hot air inside the furnace only when carrying the processed workpiece into the furnace or when carrying it out from the furnace. The case where the hot air is blocked is shown.

In Fig. 1, D is the main body of the drying oven, and inside the main body (inside the oven), a blower, etc. The blown hot air flows in through the duct, mouth, and 8, filling the furnace.

A fixed lid 1 is fixedly installed in the center of the upper part of the main body, and an inlet 4 and an outlet 5 are provided on both left and right sides of the fixed lid 1 for loading and unloading the mounting carrier par 2 (3 is the object to be processed). It is being

Opening/closing lids 6 and 7 are disposed above the loading entrance 4 and the loading exit 5, respectively, so as to be able to slide freely in the horizontal direction, but the opening/closing operation means of the opening/closing lids 6 and 7 are the same; The unloading side will be explained with reference to FIG.

The sides of the base plate 9a (the opening/closing lid 7 is fixed to this plywood) having wheels 9 that slide on rails 8 placed at the front and rear (viewed from the front) of the central fixed lid 10 are made of bar material. 10
It is connected to, for example, an air cylinder 11 via a cylinder 11, and when the opening/closing lid 7 is pulled by the operation of the cylinder 11, the outlet 7 is opened, and when it is extended, the outlet 5 is closed.

Note that when the opening/closing lid 7 is in the closed position, the base plate 9a
The wheels 9 are located below both sides (front and rear when viewed from the front) of the outlet 5, and the outlet 5 is completely sealed off by the opening/closing lid 7 on the top of the plywood.

In other words, each air cylinder 1 respectively disposed on the fixed lid 1
By the operation 1, the carry-in side opening/closing lid 6 and the carrying-out side opening/closing lid 7 are moved to sequentially open and close them.

Air blowers 12 and 13 are arranged on the loading and unloading sides of the main body, respectively, so as to suck in hot air through passages a and b leading into the furnace.

Reference numeral 14 denotes a duct through which the air (hot air) from the carry-in side blower 12 flows, and an outlet 15 for blowing out the hot air from the blower 12 is provided at the end of the duct 14, that is, in a portion facing the entire surface of the carry-in port 4. .

Further, 16 is a duct for flowing hot air from the unloading side blower 13.
The blower 1 is installed at the end facing the entire surface of the outlet 5.
An air outlet 17 is provided to blow out hot air from the air outlet 3.

Reference numeral 3 designates a workpiece suspended vertically in a long and narrow manner on the carrier par 2, and A designates a conveyance machine for the workpiece.

To explain the operation, in the final treatment tank of the surface treatment equipment, the mounting carrier par 2 on which the processed object 3 is suspended is suspended by a conveying machine A such as a crane or a hoist, and is moved vertically. When it is transported downward and reaches near the loading port 4 of the drying oven main body, this is detected electrically and the loading side air cylinder 11 is activated, which causes the loading side opening/closing lid 6 to open and opening the loading port 4. (The opening/closing lid 7 on the exit side is closed).

The workpiece 3 is transferred horizontally within the furnace by a carrier par 2 mounted on a transfer device.

Immediately before the carry-in side opening/closing lid 6 opens (1 to 3 seconds), this is electrically detected and energized to operate the carry-in side blower 12, thereby blowing the hot air inside the furnace from passage a as shown by the arrow. The hot air is sucked in, passed through the duct 14, and blown out in the horizontal direction from the blow-off port 15 on the carry-in side, and the blowing hot air blocks the entire surface of the carry-in port 4, thereby preventing hot air from being released inside the furnace.

As described above, while the opening/closing lid 6 is opened and hot air from the blower 12 is being blown out from the outlet 15, when the mounting carrier 2 has been carried into the furnace together with the workpiece 3, the electric current is applied again. The air cylinder 11 on the carry-in side is operated again to close the cover 6 on the carry-in side, and the rotation of the blower 12 is stopped to stop blowing out hot air from the outlet 15.

The workpiece 3 carried into the furnace is dried while being moved to the exit port 5 side by a horizontal transfer device, and after a predetermined drying time has elapsed, the workpiece 3 is transported out of the furnace through the exit port 5. However, in this case as well, the same effect as when carrying in the object to be processed is performed.

That is, when the drying process of the object 3 in the oven is completed and it reaches the vicinity of the carry-out port 5, this is electrically detected and the carry-out side air cylinder 11 is activated, so that the carry-out side opening/closing lid 7 opens and the carry-out port 5 is closed. to open.

At this time, the carry-in side opening/closing lid 6 remains closed, and just before the carrying-out side opening/closing lid 7 is opened (1 to 3 seconds), this is electrically detected and energized to operate the carrying-out side blower 13. Then, the hot air in the furnace is sucked in and passed through the duct 16 as shown by the arrow, and the hot air is blown out from the outlet 11 on the outlet side, thereby blocking the outlet 5 and preventing the hot air in the furnace from being released outside the furnace. In synchronization with the full opening of the unloading side opening/closing lid 7, the dried workpiece 3 is vertically conveyed out of the furnace together with the carrier par 2, but when the unloading is finished, this is electrically detected again and the unloading side is opened. The air cylinder 11 is operated, thereby closing the carry-out side opening/closing lid 7, and stopping the power supply to the blower 13 on the carry-out side to stop its rotation, and also stop blowing hot air from the blower outlet 17.

The above action is repeated.

In addition, in the above embodiment, the blower that blows out the hot air in the furnace from the outlet was operated intermittently only when the materials to be treated were brought in and taken out, but the blower was designed to be operated constantly during the drying process. Furthermore, the hot air ejected from the outlet is not limited to only the hot air inside the furnace, and it is also possible to bypass the light air from the hot air generating furnace and use it.

In short, the present invention uses an inlet 4 for transporting the workpiece 3, which has completed its respective treatment process and is suspended vertically into a furnace filled with hot air, in various types of surface treatment equipment.
Opening/closing lids 6 and 7 are respectively disposed at the loading port 5 and the loading port 5 through which the loaded workpiece is carried out after being subjected to a predetermined drying process in the furnace. It has an automatic opening/closing means 10.11 which starts opening immediately before and closes when it is stored in the furnace, and starts opening the carry-out side opening/closing lid 7 immediately before carrying out the processing object after completion of predetermined drying, and closes it when carrying out is finished. In the drying furnace, air outlets 15 and 17 are provided in the furnace body located on each side of the loading port 4 and the loading port 5 for the material to be processed 3, and open directly below the loading port and loading port, respectively.
During operation, the hot air inside the furnace is sent to each of the air outlets 15 and 17.
It is characterized by having an air blower that blows out horizontally from the loading port 4 directly below the loading port 5 when opened, and blocks the entire lower part of the loading port and loading port.

This is a drying oven in surface treatment equipment.

That is, according to the present invention, the period from just before the workpiece is carried into the furnace from the final treatment tank of the surface treatment apparatus through the entrance of the drying furnace until it is stored in the furnace after being carried in, and the period during which the workpiece is stored in the furnace, During the period from just before the process is completed and carried out of the furnace through the carrying out port until the end of carrying out, the respective opening/closing lids are opened by the operation of the automatic opening/closing means, but during this period, at least the blower is operated to prevent the carrying in. In-furnace hot air or bypass hot air from the hot-air generating furnace is blown out from the outlet on the side of the inlet and outlet to the entire area immediately below each opening of the inlet and outlet, and each of the openings is blocked by these hot air. The hot air inside the furnace is not discharged outside the furnace, and the uniformity of the heat distribution inside the furnace is maintained.

Therefore, it prevents the loss of thermal energy within the furnace and has a practical effect of not having any adverse effects on the objects to be treated.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial longitudinal sectional side view of a drying oven according to the present invention, and FIG. 2 is an enlarged partial longitudinal sectional side view for explaining the automatic opening/closing means of the opening/closing lid shown in FIG. In the figure, D is the drying oven body, 1...Fixed lid, 2...
・Mounting carrier par 3...Processed object, 4,5
... Loading entrance. Export port, 6, 7...Opening/closing lid, 8...Rail, 9...Wheel, 9a...Wheel base plate, 10...・Bar material, 11...Automatic opening/closing means using air cylinder, 12, 13...Blower,
14, 16... Duct, 15, 17...
・Air outlet.

Claims (1)

[Scope of utility model registration request] In various types of surface treatment equipment, there is an inlet for transporting the workpieces suspended vertically into a furnace filled with hot air after the respective processing steps have been completed, and an entrance for transporting the workpieces into the furnace filled with hot air. On the other hand, an opening/closing lid is provided at each of the carrying-out ports to be carried out after a predetermined drying process has been performed, and the carrying-in opening/closing lid is opened just before the material to be processed is carried in, and is closed when it is stored in the furnace.
In addition, in a drying oven having an automatic opening/closing means for opening and closing the carry-out side opening and closing lid immediately before carrying out the processed material after a predetermined drying period and closing it at the time of completion of carrying out, each side of the carrying-in port and the carrying-out port of the processed material The furnace body is located on one side, and the furnace body is provided with air outlets that open directly below the loading port and outlet, and hot air in the furnace is supplied from each of the blowing outlets when the furnace is operated. 1. A drying oven for a surface treatment apparatus, comprising: a blower that blows out air horizontally to the air supply port and blocks the entire lower part of the carry-in port and carry-out port.