JPS5833022B2 - Baking coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a baking coating device, and is particularly characterized by a transfer device for transferring a product from a centrifugal coating device to a drying oven, and a multistage drying oven.

To explain using Dacro treatment as an example of baking painting,
In this process, small parts such as bolts and screws are immersed in a three-component surface treatment mixture of chromic acid anhydride, special metal zinc particles, and a reducing agent, and then baked.

After immersion, excess chemicals are shaken off using a centrifuge in order to maintain a constant film thickness, and the film is baked in a hot air circulating oven, usually at 260 to 300°C, and immediately cooled in the air after being taken out of the oven.

Generally, this process is repeated two times to thicken the coating.

Conventionally, the main parts of a dove treatment device include a dip tank containing a dove treatment solution, a cage in which the equipment is placed and immersed, a centrifugal coating device with a mechanism for lifting and lowering the cage, a rotation mechanism, etc., and a drying oven.

The novel structure of this invention is that the drying oven has a built-in multi-stage horizontal conveyor inside the oven, and that a specially structured transfer device is added to transfer the product from the coating device to the drying oven.

The drawings will be explained below.

Figures 1 and 2 are front and plan views of a Dacro treatment apparatus which is an embodiment of the present invention, and only the vicinity of the inlet of the drying oven is shown.

Broadly divided, the centrifugal coating device 1 consists of a centrifugal coating device 1, a transfer device 2, and a drying oven 3.The centrifugal coating device 1 includes a dip tank 4, a product cage 5, a cage elevating mechanism, that is, an elevating cylinder 6, an elevating motor 7, etc., and a cage rotating mechanism. That is, it has a motor etc. (not shown) inside the inner cylinder 6, an outer cylinder 8 with all the above-mentioned parts except for the dip tank 4, and a horizontal rail 9 attached to the frame 10 from above the tank 4.
It is possible to move along the line to a product supply position on the side of the dip tank 4.

By separating the supply position and the coating position, it is possible to prevent the attachment of the dip liquid harmful to the human body when the product is supplied manually, and it is easy to set up the supply device when it is supplied mechanically.

The drying oven 3 has a three-stage horizontal conveyor 11 going from the inlet to the outlet.
Built-in.

In the figure, only the inlet side is shown, but drive motors for the respective conveyors 11 are placed outside the furnace on the exit side (not shown), and various rings inside the furnace are rotated by a chino.

In this case, a double door 13 on the side of the furnace 3 can be fully opened by a hinge 12.

The transfer device 2 placed between the coating device 1 and the drying oven 3 is
An elevator frame 14, an elevator frame 15, a horizontal conveyor frame 16 that is mounted on the elevator frame 15 and can be horizontally moved within a certain range, its circulation conveyor 17, an elevator motor 18, a horizontal movement motor 19,
It is equipped with a circulation motor 20 and the like.

The lifting motor 18 simultaneously drives the vertical threaded rods 21 at the four corners of the machine frame 14 to lift and lower the lifting frame 15, which has female threads that mesh with the vertical threaded rods 21.

The horizontal movement motor 19 drives the gears 22 on both sides once to horizontally move the conveyor frame 16 with racks 23 attached on both sides.

24 is the receiving roller.

In this case, the circulation motor 20 drives the conveyor 17 in circulation around the tip of the conveyor frame 16 .

In order to operate this Dacro treatment apparatus having the above-described structure, first, a product is placed in the cage 5 of the centrifugal coating apparatus 1 at the product supply position shown by the chain line in FIG. 2, and then transferred to the coating position shown by the solid line in the same figure.

Therefore, after lowering the cage 5 and immersing it in the chemical solution in the dip tank 4, the cage 5 is held at the liquid level or above and rotated at high speed, and the centrifugal force blows the excess liquid through the mesh of the cage and onto the tank wall. Once shaken off, raise the cage 5 to the position shown in Figure 1.

The transfer device 2 will now begin to operate, moving the horizontal conveyor frame 16 from the elevator frame 15 at the height of the standby position in FIG. Insert into.

Then, the products are dropped from the cage 5 by circulating the conveyor 17, but the products are not dropped from the cage 5 all at once, but are dropped little by little by allowing the bottom of the cage 5 to be opened and closed.

Then, the products are arranged on the conveyor 17 without being piled up.

When all the products have fallen, the circulation of the conveyor 17 is stopped and the conveyor frame 16 is pulled back to the solid line position in FIG.

Next, the elevating frame 15 is raised or lowered depending on which of the three-stage furnace conveyor 11 to which the products are to be transferred in the drying oven 3, and the height of the conveyor 17 is brought to a desired position.

Next, the conveyor frame 16 is now projected toward the drying oven 3, and the other end is moved to the position 16'' shown by the chain line in FIG.

At the upper position 16'', the end of the conveyor 17 is drawn so as to overlap the end of the in-furnace conveyor 11, and at the lower position 16'', the end of the conveyor 17 and the end of the in-furnace conveyor 11 are drawn so as to butt against each other. Either is fine.

In short, the products on the conveyor 17 can be sequentially transferred onto the in-furnace conveyor 11 by bringing the ends of both conveyors together and driving both conveyors in circulation at the same time.

When all the products on the conveyor 17 have been transferred into the furnace, both conveyors are stopped, but the in-furnace conveyor 11 may be moved further to move the products to appropriate positions in the furnace.

If the drying oven 3 is long, the cage 5 will have to be operated several times to fill only one stage of the oven conveyor 11, and if there are three stages, the cage 5 will have to operate even more times.

Therefore, the coating device 1 operates continuously and coats the products one after another in the drying oven 3.
, and those that have entered the furnace for a predetermined period of time can be taken out in sequence.

The drying oven 3 may be either a batch type or a continuous type.

In order to increase the feeding speed of the product sent from the coating device 1 to the drying oven 3 via the transfer device 2, a plurality of coating devices 1 are provided surrounding the receiving side of the transfer device 2, and each cage 5 is transferred alternately. The product may be dropped onto the conveyor 17 of the device 2.

For example, when doubling production, conventionally it was necessary to install two sets of all equipment, but with this invention, only the centrifugal coating equipment needs to be added.

This invention has been described above with reference to one embodiment, but the main feature of this invention is that a drying furnace is equipped with a multi-stage conveyor circulation section, and products from a coating device are mechanically transported by a transfer device that can be moved up and down, horizontally, and circulated. It is natural for designers to make appropriate changes and applications depending on the design conditions during implementation.

This invention connects the coating equipment and the drying oven with an independent transfer device, so the entire line can be
The design and manufacture of the system are simplified, and as mentioned above, the production volume can be easily increased by adding only the coating equipment, and the floor space required is relatively small.

Moreover, the process operations are not fixed, and can be automated into several types of operations, for example, by using a pinboard programmer.

During use, products are dropped little by little onto the circulating conveyor and transferred to the in-furnace conveyor in the same arrangement, making it possible to achieve consistent full automation, resulting in labor savings, efficiency, and quality improvements. .

In addition, when dropping products from the cage, the fallen products move immediately, minimizing the drop and reducing the number of dents caused by falling.When feeding products into the furnace, only one product needs to be moved over the ends of both adjacent conveyors. The number of dents on the product is significantly reduced compared to the conventional method.

That is, the present invention provides a multistage drying oven, a multifunctional transfer device,
By working together, the independent painting equipment and coating equipment achieved economic and technical effects such as shortening the intermediate process of baking painting, reducing floor space, and improving painting quality.

[Brief explanation of drawings]

Fig. 1 is an elevational view of an embodiment of the present invention, and Fig. 2 is a plan view thereof, in which 1 is a centrifugal coating device, 2 is a transfer device, 3 is a drying oven, 4 is a tank, and 5 is a product cage. , 11 is an in-furnace conveyor circulation section, 14 is an elevator frame, 15 is an elevator frame, 16 is a horizontal conveyor frame, 17 is a circulation conveyor, and 18, 19, and 20 are drive motors.

Claims (1)

[Claims] 1. A tank containing a coating solution, a product cage with a bottom that can be opened and closed, and a centrifugal coating device with a mechanism for lifting and lowering the cage and rotating it.
A drying oven that incorporates a horizontal rail that moves the product cage from above the tank to the product supply position, a multi-level horizontal conveyor circulation section, and a drying oven that takes out the painted products from the coating device and transfers them to any conveyor in the drying oven. Equipped with a transfer device to send the
The transfer device consists of an elevator frame, an elevator frame, a horizontal conveyor frame that is mounted on the elevator frame and can be horizontally moved within a certain range, its circulation conveyor, and each drive device, and one end of the horizontal conveyor frame of the transfer device is inserted into the lower part of the product cage of the coating device, the conveyor is driven in circulation, and the products that are sequentially dropped from the open bottom of the S cage are arranged on the upper surface of the conveyor, and the horizontal conveyor frame is pulled back to suit the needs. A baking coating device characterized in that after being lifted and lowered, the other end is moved to the end of the conveyor in the drying oven, and both conveyors are driven simultaneously to sequentially transfer the products onto the conveyor in the oven.