JPH0351471B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for automatically coating objects to be coated, which are continuously transported by a conveyor, using a coating machine.

<Prior Art> In automatic painting of automobile bodies, the bodies are placed on a conveyor at predetermined intervals, and the bodies are directly and intermittently transported into a painting booth for painting.

When painting the body of an automobile, if a predetermined amount of paint is applied at one time, the paint will sag or become uneven, so a predetermined amount of paint is applied in two parts.

As shown in Fig. 2, the method is to arrange two automatic coating machines 3 and 4 along a straight conveyance line 2 inside the painting booth 1, and to transfer the bodies carried into the painting booth 1 to the first A first process in which the first coating is performed by the automatic coating machine 3, a second flash-off process in which the solvent of the first coating is volatilized, and a third process in which the second coating is performed by the second automatic coating machine 4. This was due to the following.

<Problems to be Solved by the Invention> The above conventional method requires two automatic coating machines, which increases equipment costs and requires spacing between the first to third processes on a straight conveyance line in the coating booth. This increases the total length required for the painting process, which poses a space problem.

<Means for Solving the Problems> The method of the present invention for solving the above-mentioned conventional problems is to transport objects to be coated continuously and intermittently in a straight line at predetermined intervals in a coating booth. In the method of painting with an automatic coating machine at a painting station, there are two steps: the process of first painting the object to be coated that has been brought into the painting station, and the step of transferring the object to be coated for the first time one pitch to the setting position, and at the same time painting the object to be coated for the first time. The process of transporting the workpiece to the painting station, and the process of transporting the workpiece transferred to the setting position during the first coating of the workpiece at the painting station to the outside of the conveyance line in the painting booth and transferring the workpiece to the subsequent workpiece. A step of waiting until the first coating of the object is completed and then flashing it off, and transporting the subsequent object to be coated after the first coating is completed to a setting position,
A process in which the object to be coated, which is waiting outside the conveyance line, is moved again to the coating station and coated for the second time with the same automatic coating machine, and during this time the object to be coated, which is at the setting position, is moved to the outside of the conveyor line and placed on standby. and,
A step in which the object to be coated that has completed the second coating is transferred to the setting position, the waiting object to be coated is moved again to the coating station and coated for the second time, and the object to be coated that has been completely coated at the setting position is transferred to the setting position. The object to be coated is carried out of the coating booth, and the object to be coated, which has been coated for the second time at the coating station, is transferred to the setting position.
The method is characterized in that the process of transporting subsequent objects to be coated into a coating station is repeated.

<Function> The above-mentioned present invention allows a single automatic coating machine to continuously coat the object twice without any loss time, with a short process length.

<Example> An example of the present invention will be described below based on FIG. 1. In Figure 1 I to O, 10 is a painting booth;
11 is a conveyance line for objects to be coated A, B, C, D, E, F...; 12 is an automatic coating machine installed on the side of the conveyance line 11 in the painting booth 10;
13 is a painting station; 14 is a setting position where the object is transferred one pitch from the painting station 13; 15 is an intermediate position where the object to be coated is moved from the setting position 14 to outside the conveyance line 11; and 16 is a position from the intermediate position 15 to the conveyance line 11. This is the standby position where the object to be coated is moved backward one pitch in parallel with the . Said setting position 14 and intermediate position 1
5. Intermediate position 15 and standby position 16, standby position 16
A conveyor for moving the object to be coated is arranged between the painting station 13 and the painting station 13.

In the above configuration, the step of the method of the present invention is performed in the first step.
This will be explained step by step with reference to Figures I to O.

First, the object A to be coated on the transport line 11 is carried into the coating station 13 and subjected to the first coating. <1st
Figure A> The object A to be coated, which has been coated for the first time, is transferred to the setting position 14, and at the same time, the subsequent object B to be coated is carried into the coating station 13. <Fig. 1 B> During the first coating of the object B, the object A transferred to the setting position 14 is moved to the standby position 16 via the intermediate position 15, and Wait until the completion of the first cycle and flash off. <1st
Figure C> The object to be coated B, which has completed the first coating, is transferred to the setting position 14, and the object to be coated A, which has been waiting, is moved again to the coating station 13 to perform the second coating. B is moved to the standby position 16 via the intermediate position 15. <Figure 1 D, H> The object A to be coated, which has completed the second coating, is transferred to the setting position 14, and the object B to be coated, which is in the standby position 16, is moved again to the painting station 13, and the second coating is performed. . <Figure 1> Move the workpiece A at the setting position to the painting booth 10.
The object to be coated B is transferred to the setting position 14, and the subsequent object C is transferred to the coating station 13.
to be transported to. <Fig. 1 G> As shown in Fig. 1 C to O below, by repeating the steps of Fig. 1 Ro to Ro, the objects to be coated C, D, E, F... It is something to do.

<Effects of the Invention> As described above, according to the present invention, when an object to be coated that is transported along a straight conveyance line is automatically coated in two parts, it is possible to coat it with one automatic coating machine, and moreover, There is sufficient flash-off time to volatilize the solvent of the first coating, and since this flash-off is outside the transport line parallel to the transport line, there is no loss time due to idleness of the automatic coating machine, and there is no need to waste time inside the paint booth. This has the effect of shortening the total process length.

[Brief explanation of drawings]

FIG. 1 is a process diagram according to the method of the present invention, and FIG. 2 is a process diagram according to the conventional method. 10...Painting booth, 11...Transportation line, 1
2...Automatic painting machine, 13...Painting station,
14...Setting position, 15...Intermediate position,
16...Standby position, A, B, C, D, E, F...
Object to be coated.

Claims (1)

[Claims] 1. In a method of painting objects to be coated that are continuously transferred intermittently along a conveyance line at predetermined intervals at a coating station in a painting booth using an automatic coating machine, the objects to be coated carried into the painting station are a step of applying the first coating; a step of transporting the object to be coated for the first time one pitch to a setting position and simultaneously transporting the subsequent object to the coating station;
While the object to be coated at the painting station is being coated for the first time, the object to be coated is transferred to the setting position within the coating booth and moved outside the conveyance line, and is kept on standby until the first coating of the subsequent object to be coated is completed and then flashed off. The subsequent workpieces that have completed the first coating are transferred to the setting position, and the workpieces waiting outside the conveyance line are moved again to the coating station and coated with the same automatic coating machine. A step of applying the second coating and moving the object to be coated at the setting position outside the conveyance line to stand by;
A step in which the object to be coated that has completed the first coating is transferred to the setting position, the waiting object to be coated is moved again to the painting station for the second coating, and the object to be coated that has completed the painting at the setting position is transferred to the coating booth. Continuous transfer characterized by repeating the process of transporting the workpiece outside, having completed the second coating at the painting station, to a setting position, and then transporting the subsequent workpiece to the painting station. Automatic coating method for objects to be coated.