JPH0127356B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface treatment apparatus including a drying chamber for a coating film applied to a metal workpiece such as an extruded aluminum alloy member.

Generally, after a synthetic resin paint is applied to a metal product, it is heated and dried. Conventionally, the drying equipment used for this heat-drying process is as shown in Figure 1. Although the drying device has an opening/closing door 4 at the top of the drying chamber 3, it is of the top-opening type like the other surface treatment tanks 1 and coating tanks 2, but the object to be treated 5 cannot be removed from the top of the drying chamber 3. Since the heat inside the drying chamber 3 is dissipated through the opening each time the drying chamber 3 is taken out or put in, there is a problem in that the loss of thermal energy is large and the drying efficiency is reduced. In order to solve this problem, it has been proposed to make the area of the upper opening as small as possible, but there is a natural limit and it has not been possible to reliably prevent heat dissipation.

However, the present invention solves all of the above-mentioned conventional problems and prevents as much as possible the loss of thermal energy during drying of the object to be treated, and eliminates the need for painting and drying the object. In view of the fact that there are certain objects to be treated and objects to be treated that are unnecessary, the object of the present invention is to provide a surface treatment apparatus that can efficiently transport all objects to be treated on the same line.

That is, the present invention provides an outside drying chamber conveyance system that is capable of horizontally transporting the workpiece from a pre-drying process directly to a post-drying process below the drying chamber, which is provided with a workpiece inlet and a workpiece exit at the bottom. A drying chamber transport device is provided above the drying chamber to transport the processed material in the horizontal direction, and the workpiece is transported into and out of the drying chamber through the inlet and the outlet, and is connected to the drying chamber outside transport device and the drying chamber transport device. The drying chamber is characterized by having a lifting device for carrying in the processed material and a lifting device for carrying out the processed material for transferring the processed material to the apparatus.

Hereinafter, the present invention will be explained based on an example of the illustrated apparatus.

The embodiment shown in FIG. 2 is provided as one step in a line for surface treatment of extruded aluminum alloy shapes, and in this case, the long extruded shape becomes the object 6 to be treated. A long workpiece 6 is suspended vertically by a horizontally long carrier bar 7, and transported to each surface treatment process by a crane 8 traveling along the surface treatment line for treatment.

The drying chamber 11 is provided next to the coating tank 9 that performs the coating process, and a processing material entrance 13 with a door 12 is provided on the lower surface of the drying chamber 11 on the coating tank 9 side, and the same is provided on the lower surface of the opposite side. A processed material exit 15 with a door 14 is provided. The drying chamber 11 is installed at a slightly higher position from the floor 10, but the lower part of the drying chamber 11 is sufficiently dug to form a space 24 so that the objects 6 entering and exiting the drying chamber do not collide with each other.

Further, a conveyor 16, which is a conveyance device outside the drying room, is installed along the floor 10 below the drying room 11.
A device for conveying the painted object 6 to the lower part of the object carrying-in port 13 and sending the dried object 6 carried out from the object carrying-out port 15 to the next process. However, this conveyor 16
In addition to the above-mentioned purposes, it is also used to directly convey the processed material to the subsequent process without coating or drying.

By this conveyor 16, the material to be processed is brought into the entrance 13.
The workpiece 6 transported to the lower part of the drying chamber 11
A lifting device 17 for transporting the workpieces into and out of the drying chamber 11 through the workpiece entrance 13 is provided to transport the workpieces 6 inside the drying chamber 11 to the outside of the drying chamber 11. Send it to conveyor 16
In order to transfer the processed material to the drying chamber, a lifting device 18 for transporting the processed material is provided, which moves the processed material into and out of the drying chamber through the processed material entrance 15. Each lifting device 17, 18 is equipped with a conveyor-equipped lift 19, 20 that supports a carrier bar 7 on which the workpiece 6 is hung and conveys the carrier bar 7 in the horizontal direction.

In the drying chamber 11, each lifting device 1
A storage shelf 21 with a conveyor is provided which is interposed between the lifts 19 and 20 to move the carrier bar 7 in the horizontal direction when the lifts 19 and 20 of the lifts 7 and 18 are positioned above.

Therefore, when transferring the carrier bar 7 from the carry-in lift 19 to the conveyor-equipped storage shelf 21 or from the conveyor-equipped storage shelf 21 to the carry-out lift 20, each conveyor is interlocked.

In addition to such a conveyor, the carrier bar 7 can be transported by means of a conveyor as shown in FIGS. 3 and 4.
A feeding device 23 equipped with an engaging claw 22 is provided,
By rotating the feeding device 23, the engagement claw 22 can push the carrier bar 7 in the direction of the arrow in the figure. In this case, a conveyor is not required for the carry-in lift 19, the carry-out lift 20, and the storage shelf 21, and it is sufficient that the carrier bar 7 is in a state where it is easy to slide.

In FIG. 2, reference numeral 28 denotes a lifter for transferring the processed objects 6 after the drying process and the processed objects 6 that are not subjected to the drying process from the conveyor 16 on the floor to the conveyor 29 for the next process.

Furthermore, in the illustrated embodiment, doors 12 and 14 are attached to the processing material entrances and exits 13 and 15 to prevent heat from leaking inside the drying chamber 11, but other leakage prevention means may be used. Alternatively, a push-pull type device can be installed with the air discharge port and suction port facing the inlet/outlet ports 13 and 15, respectively.

The workpiece 6 that has been coated is sent into the drying chamber 11 through the workpiece inlet 13 provided at the bottom of the drying chamber 11 by the lifting device 17, where it is baked and dried for a certain period of time. After treatment, drying room 1
1 from the processing material exit port 15 provided on the lower surface of the
It is sent out of the drying chamber 11 by the lifting device 18.

In addition, the object 6 to be treated that is not subjected to painting or drying is transported by the crane 8 from the previous process such as the sealing process and placed on the conveyor 16, and is then transported by the conveyor 16 without being sent to the drying room. It is directly transported to the next process.

In the drying chamber 11 as described above, the following measures have been taken to effectively utilize the heat contained in the heated air discharged.

That is, when the object to be processed 6 is heated and dried in the drying chamber 11 in the sealed state, solvent gas is diffused from the coating film of the object to be processed 6 and fills the upper part of the inside of the drying chamber 11. drying chamber 11 for the discharge of
An outlet 30 for discharging dirty heated air is provided at the top of the air conditioner, and a duct 25 for external discharge is connected to this, and a heat exchanger 31 is connected to the duct 25. A duct 32 for introducing fresh air from outside is connected to the heat exchanger 31, and the duct 32 is further connected to the lower part of the drying chamber 11 via a fan 33 and a hot air generator 34.

In FIG. 5, 35 is an exhaust fan, 36 is an intake fan, 37 is a filter, and 38 is a circulation duct connected to a new air introduction duct. This circulation duct 38 is provided with a dirty heated air outlet 30, and the discharge duct 25 is provided here.
may be concatenated.

Thus, the heat of the dirty heated air discharged from the upper part of the drying chamber 11 is replaced with fresh air in the heat exchanger 31, and the new air preheated by this heat replacement is further transferred to the hot air generator. 34, the object to be treated 6 is sent into the heated upper drying chamber 11.
is heated and dried.

As described above, in the present invention, the objects to be processed are introduced from the bottom of the drying chamber and taken out from the bottom, so there are no openings for entry and exit at the top of the drying chamber, and therefore unlike the conventional method, there is no opening for entry and exit. The hot air inside the drying chamber does not escape through the opening each time the workpiece comes in and out, and the baking drying temperature inside the drying chamber can be maintained at all times regardless of the workpiece going in and out, so thermal energy loss is reduced. It has a practical benefit that rarely occurs, and it contributes to energy saving measures in surface treatment factories and has the effect of reducing running costs.

In addition, since the hot air inside the drying chamber does not escape, there is no time loss required for reheating the drying chamber whose temperature has dropped as in the conventional method, and the baking drying process of the processed material can be carried out efficiently. It has practical benefits that can be achieved.

In addition, the present invention provides a conveying device outside the drying chamber that can horizontally convey the workpiece from the pre-drying process directly to the post-drying process below the drying chamber, and horizontally transports the workpiece above the drying chamber. an elevating device for transporting the processed material to the drying chamber, and a lifting device for transporting the processed material into and out of the drying chamber through the inlet and exit, and to deliver the processed material to the drying room external transport device and the drying indoor transport device; And since a lifting device for carrying out the workpieces is attached to the drying chamber, workpieces that do not require drying can be transported directly to the subsequent process without passing through the drying room by the above-mentioned transport device outside the drying room. On the other hand, a workpiece that requires a drying process can be subjected to a predetermined drying process by the transporting device inside the drying chamber and both lifting and lowering devices, and then transported to a subsequent process by the transporting device outside the drying room. Therefore, efficient transportation according to the object to be processed is possible.

Furthermore, the above-mentioned drying room outside conveyance device transports the processed material that has been painted to the lower part of the processed material inlet, and also transports the processed material after the drying process carried out from the processed material inlet to the post-processing stage. It has the function of directly sending processed materials that do not require drying to the subsequent process, and has the function of directly sending processed materials that do not require drying to the next process. There is no need to provide a conveyance device, and a compact and inexpensive surface treatment device can be provided.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a conventional surface treatment device;
Fig. 2 is a schematic diagram showing an embodiment of the device of the present invention;
4 and 4 are sectional views of a drying chamber showing another embodiment, and FIG. 5 is a flowchart showing air flow. Code, 6...Product to be processed, 11...Drying chamber, 13
...To be processed material inlet, 15...To be processed material inlet,
16... Conveyor as a drying room outside conveyance device, 1
7... Elevating device for carrying in the object to be processed, 18... Elevating device for carrying out the object to be processed.

Claims (1)

[Claims] 1 Below the drying chamber, which has a processing material inlet and a processing material exit at the bottom, is installed an external drying room transport device that can horizontally transport the processing material from the pre-drying process directly to the post-drying process. A drying indoor transport device is provided above the drying room to transport the workpiece in the horizontal direction, and the workpiece is transported into and out of the drying room through the inlet and exit, and the workpiece is transferred to the outside drying room transport device and the drying indoor transport device. A surface treatment apparatus characterized in that a drying chamber is provided with an elevating device for carrying in and transferring objects to be processed and an elevating device for carrying out objects to be processed.