JPS622864B2 - - Google Patents

Description

Transfer device 50 for return movement A powder coating device comprising:

[Detailed description of the invention]

The present invention relates to an apparatus for efficiently and easily coating a part of a substrate to be coated using a powder coating.

Conventionally, when only a portion of a substrate to be coated is coated, a so-called masking method has been frequently used in which the portion that is not to be coated is covered and coated.
However, using this masking method naturally requires time and effort for masking, and time and effort to remove this masking after painting, which is a big disadvantage in terms of process and economy, especially when painting small parts of parts. It had

The present invention was proposed in view of the above situation, and provides an apparatus that can efficiently and easily coat a part of a substrate to be coated.

That is, the present invention includes a heating unit equipped with a heater for heating a painted portion of a substrate to be coated, a dipping tank containing a powder coating material, and a coating layer surface of the substrate to be coated in the dipping tank. a coating section including a leveling member that moves back and forth on the surface of the paint layer each time in the coating process to level the surface of the paint layer; and a holding member that removably fixes and holds the base material to be coated. , the holding member is transferred from the carrying-in part of the substrate to be coated to the heating part,
Next, a powder coating apparatus comprising a transfer device that repeatedly moves the powder from the heating section to the coating section, and then from the coating section to the unloading section for the substrate to be coated, following a predetermined trajectory, A detailed description will be given below along with examples.

FIG. 1 of the accompanying drawings is a perspective view of a hose band B showing an example of a base material to be coated, and as shown by chain arrows FF in the figure, the legs of this hose band are the parts to be coated. This hose band B is a small item with a ring body diameter of about 10 to 20 mm, and it is obvious that it is extremely difficult and inefficient to mask the ring body in order to paint the legs. Probably.

FIG. 2 shows the hose band B being applied to a rod 11 in order to coat the hose band B by the method of the present invention.
Workpiece 10 made by hanging a large number of pieces to form one work unit
FIG.

FIG. 3 and the following are diagrams showing the device of the present invention,
Fig. 3 is a schematic plan view of the entire coating device, Fig. 4 is a front view showing a holding member for fixing and holding the substrate to be coated in the device, and Fig. 5 is an end view taken along line 5-5 in Fig. 4. Figure 6 is an end view taken along line 6-6 in Figure 4, Figure 7 is a cross-sectional view of the main parts showing the state of painting in the painted section, and Figure 8 shows the operating state of the leveling member. FIG.

As is clear from the overall plan view of FIG.
0, a holding member 40, and a transfer device 50. As shown in the figure, a carry-in section 61 consisting of a carry-in conveyor for the substrate to be coated and a carry-out section 62 consisting of a carry-out conveyor are provided before and after this device.
will be installed.

In addition, in FIG. 3, the reference numeral 21 in the heating section 20
Reference numeral 31 indicates a heating section such as a gas burner, numeral 31 in the coating section 30 indicates a dipping tank containing powder coating, 35 indicates a leveling member, 36 indicates a moving frame, 37 indicates a cylinder device, and 51 indicates a head on a transfer device. .

As shown in the figure, the workpiece 10 held by the holding member 40 follows a predetermined trajectory position from the carrying-in conveyor 61 to the heating section 20, then from the heating section 20 to the coating section 30, and then from the coating section 30 to the carrying-out conveyor 62. They are sequentially and repeatedly transferred by the moving transfer device 50.

First, the workpiece 10, which is made up of a work unit by suspending a large number of hose bands B to a rod 11 as shown in FIG. 2, is held by a holding member 40 as shown in FIG.
It is held fixed for painting.

As can be understood from FIG. 4 and FIGS. 5 and 6, which are partial sectional views thereof, the holding member 40 includes hook-like arms 42, 42 that lift and hold both ends of the rod 11 of the workpiece 10 upward; Work 1
The work piece 10 is sandwiched between the hook-like arm 42 and the umbrella part 45 to securely hold the workpiece 10 firmly.

That is, the hook-like arms 42, 42 provided at both ends of the base shaft 41 are configured to be openable and closable by a cylinder device 43, etc., and the holding or opening of the workpiece 10 is controlled. One umbrella part 45
is attached to the base shaft 41 via a cylindrical portion 44, and this umbrella portion 45 is rotated by a certain angle as shown by the chain line in FIG. 6 by a cylinder device 46 etc. connected to the cylindrical portion 44. It's becoming like that. Such rotation of the umbrella portion 45 can provide great convenience in efficiently performing heating and coating of the substrate to be coated, which will be described later.

In the figure, reference numeral 47 is a fixed bearing of the base shaft 41, 48, 4
9 represents a bracket.

The main body of the transfer device 50 is composed of, for example, a scalar type robot as in the embodiment, and the workpiece holding member 40 is attached to the head 51 at the tip thereof. Then, this transfer device moves at a predetermined trajectory position determined in advance by, for example, an electronic circuit, that is, from the carrying-in part of the substrate to be coated to the heating part, then from the heating part to the painting part, and then to the painting part. It is configured to repeatedly move sequentially from the coating section to the unloading section for the substrate to be coated, following a predetermined trajectory.

That is, the workpiece 10 picked up from the carry-in conveyor 61 and held by the holding member 40 is
By the transfer device 50, the material is sent from the loading section 61 to the heating section 20 equipped with a heater 21 such as a gas burner,
The painted part of the base material to be painted (here, hose band B)
legs) are heated. The heating temperature and heating time of the substrate to be coated vary depending on the type of substrate or paint, but in the examples, it was heated at about 300° C. for about 2 to 4 seconds.

It goes without saying that the only part to be heated is the coated part, but for this reason, the holding position of the holding member 40 relative to the substrate to be coated can be freely improved in order to heat efficiently.

The workpiece 10 whose painted portion has been heated is then transferred to the coating section 30 by the transfer device 50.

As can be understood from the plan view in FIG. 3 and the cross-sectional view in FIGS.
It is composed of a leveling member 35 that can level the surface of one paint layer with respect to the painted portion of the substrate to be coated each time. This break-in member 3
5 is fixed to a moving frame 36 connected to a cylinder device 37, and when the cylinder device is operated, it moves back and forth inside the dipping tank 31 for each coating process to flatten the surface of the paint layer. I will shoulder the burden.

In addition, as shown in FIG. 8, the leveling member 35
is configured such that it can be adjusted up and down according to the height of the surface of the paint layer by means of a cylinder device 39 and an arm 38 connected thereto. In the figure, reference numeral 32 is a guide rail plate, 33, 33 are wheels for traveling, and 34 is a wheel for positioning the width of the frame 36.

Then, a predetermined portion of the base material B to be coated of the workpiece 10 is dipped into the powder coating layer from the surface of the flattened coating layer of the dipping tank 31, and the coating material P is applied thereto. Since the surface of the paint layer is flattened,
Only the dipped portion of the base material to be coated can be partially coated.

In FIG. 7, reference numeral 29 is a paint hopper, and 28 is a storage portion for storing excess paint removed by the leveling member 35.

In addition, here, to explain a little more about flattening the surface of the paint layer, flattening the surface of the powder paint layer in the dipping tank means that only a predetermined part of the substrate to be coated is coated. This flatness is not necessarily horizontal;
It includes an inclined flat surface. That is, depending on the part of the substrate to be coated, for example, when painting a part of the side of the substrate, it is more convenient for the surface of the other paint layer to be an inclined flat surface. . Furthermore, in the case of painting small objects, this inclined flat surface may form a V-groove in the paint layer and utilize the inner wall surface of this V-groove.

Therefore, the term "flat" in this invention should be understood to mean that it is flat with respect to the coated portion of the substrate to be coated, and the same applies to the leveling member.

As described above, according to the present invention, there is provided a heating unit equipped with a heater for heating the painted portion of a substrate to be coated, a dipping tank containing powder coating material, and a coating layer surface in the dipping tank. a coating section including a leveling member that moves back and forth on the surface of the paint layer every time in the coating process to level the surface of the paint layer on the coated part of the base material to be coated;
A holding member for removably fixing and holding the base material to be coated; By adopting a configuration consisting of a transfer device that repeatedly moves the base material sequentially along a predetermined trajectory to the unloading section, the material to be coated can be coated without the laborious and time-consuming masking required in the past. It is now possible to continuously and automatically paint specified areas without changing the state.

This is particularly advantageous for partial painting of small items, etc., which cannot be masked or is difficult to mask due to technical or cost considerations.

Further, according to the present invention, only the painted portion of the base material to be coated is immersed into the paint layer from the surface of the powder paint layer whose surface is smoothed, and the paint is applied to the paint layer to perform partial painting. Only a predetermined portion of the base material to be coated is coated accurately and beautifully.

Furthermore, as in the example, a large number of substrates to be coated are treated as one workpiece, and the heating section and the coating section are successively transferred using a transfer device such as a robot that moves along a predetermined fixed locus position. If the coating is transported in a controlled manner, a large amount of coating can be done extremely simply and easily in a short period of time, and it can have immeasurable effects in terms of process and economy.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a hose band B showing an example of a base material to be coated, Fig. 2 is a front view of a workpiece in which a number of hose bands B are hung on a rod to form one work unit, and Fig. 3 5 is a schematic plan view of the entire coating apparatus showing an embodiment of the present invention, FIG. 4 is a front view showing a holding member for fixing and holding the substrate to be coated in the apparatus, and FIG. End view cut along the line, No. 6
The figure is also an end view taken along line 6-6 in Figure 4.
FIG. 7 is a cross-sectional view of the main parts showing the coating state in the painted section, and FIG. 8 is a cross-sectional view showing the operating state of the leveling member. 10... Workpiece, 20... Heating section, 30... Painting section, 31... Dipping tank, 35... Leveling member, 4
0... Holding member, 42... Hook-shaped arm, 45
... Umbrella section, 50 ... Transfer device, 51 ... Head,
P...Powder coating layer.

Claims (1)

[Claims] 1. A heater 21 that heats the painted part of the base material to be painted.
a heating unit 20 equipped with a heating unit 20, a dipping tank 31 containing the powder coating P, and a first part of the coating process in order to level the surface of the paint layer in the dipping tank against the coated part of the substrate to be coated. a coating section 30 equipped with a leveling member 35 that reciprocates on the surface of the paint layer every time; a holding member 40 that removably fixes and holds the substrate to be coated; Loading section 61
from the heating section 20, then from the heating section to the coating section 30, and then from the coating section to the unloading section 62 for the substrate to be coated, following a predetermined trajectory.