JPS63123473A - Method of coating automated coating line - Google Patents

Abstract

PURPOSE:To apply a coat without any paint loss and ambient contamination by providing two transport lines which transports articles to be coated sequentially at a fixed pitch and permitting paint to be injected from a direction at right angles to be applied to articles to be coated on either of transport lines. CONSTITUTION:Two transport lines 3, 4 which transport articles to be coated (a) are installed parallel to each other in front of a nozzle for paint injection 2 provided in a coating booth 1 in such a manner that the transport lines may cross a paint injection direction at right angles. Both transport lines 3, 4 transport the articles to be coated (a) suspended at a fixed pitch to the same direction at the same speed, and the articles (a) on each transport line 3, 4 are arranged in a zigzag form, shifted at half a pitch from the other. Therefore, if a space between adjoining forward and backward articles to be coated (a) on either of the lines meets the front of the nozzle 2, the articles to be coated (a) on the other line run in front of the nozzle 2, resulting in the efficient application of paint to the articles to be coated without any loss.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for applying coating to an object to be coated in an automatic painting line, and in particular, it is possible to efficiently apply paint sprayed from a nozzle to an object to be coated. The present invention relates to a painting method.

Problems to be Solved by the Prior Art and the Invention Conventionally, general automatic painting lines have a
A line for transporting objects to be coated is laid in a direction perpendicular to the paint spray direction, and a large number of objects to be coated are suspended from hangers at intervals and run along the transport line, so that the objects to be coated are sequentially transported. However, if the space between the adjacent objects to be painted corresponds to the front of the nozzle, the paint sprayed from the nozzle will not be applied to the objects to be painted and will continue to flow forward. Not only was paint blown away, the paint was wasted, but the area around the conveyor line became dirty in a short period of time.

Means for Solving the Problems As a means for solving the above-mentioned problems, the coating method in the automatic painting line of the present invention is such that objects to be coated are sequentially placed at a constant pitch in front of a nozzle that sprays paint. Two conveyance lines are laid parallel to each other in a direction substantially perpendicular to the paint spraying direction, and in front of the nozzle, one conveyance line is placed between adjacent front and rear objects to be coated. The structure is such that the objects to be coated on each of the transport lines are moved and coated so that the objects to be painted on the transport lines are positioned.

Functions and Effects The present invention has the above-described configuration, and the space between the adjacent objects to be coated before and after the object to be coated on one conveyance line passes through the front surface of the nozzle until the next object to be coated arrives. While corresponds to the front of the nozzle, the object to be painted on the other conveyance line runs in front of the nozzle, and the paint is applied to the object.
When the object to be coated on this other conveyance line passes in front of the nozzle.

Again, the object to be painted on one of the above-mentioned conveyance lines travels in front of the nozzle, and the paint is applied to the object. When the space corresponds to the front of the nozzle, the object to be painted on the other conveyor line is run in front of the nozzle and the paint is applied to that object, reducing paint loss. Not only can you save a lot of paint, but you can also reduce the amount of paint scattered around the conveyor line, making cleaning easier.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the first embodiment of the present invention, in front of a nozzle 2 for spraying paint installed in a coating booth 1, two conveyor lines 3.4 for conveying the object to be painted a are arranged at right angles to the spray direction of the paint. These conveyor lines 3.4 are laid parallel to each other across the
The objects to be coated (a) are suspended at a constant pitch and transported in the same direction and at the same speed as shown by the arrows.

The objects a on each conveyor line 3.4 are arranged in a staggered manner, shifted by half a pitch from each other. After the paint is applied, as shown by the chain line, the object to be painted a
When the rear end of the object a in the transport direction reaches the front surface of the nozzle 2, the front end of the workpiece a on the opposite transport line 4 in the transport direction reaches the front surface of the nozzle 2, and the next one on the transport line 3 on the front side Until the object to be painted a arrives, the paint from the nozzle 2 is applied to the object a on the opposite conveyance line 4, and when the object a on the opposite side passes through the front of the nozzle 2. Instead, the object a to be coated on the transport line 3 on the near side runs in front of the nozzle 2, and by repeating this, the object a on the transport line 3 on the front side and the object a on the opposite transport line 4 are alternately coated. administered.

Next, a second embodiment suitable for coating both the front and back surfaces of the object to be painted will be described with reference to FIG.

A circulation path is formed by two conveyance lines 13 and 14 laid parallel to each other on the front side of the nozzle 2, and the workpiece a suspended at a constant pitch is moved to the surface side by the conveyance line 13 on the near side. is conveyed from the right side to the left side in the figure with the position facing the nozzle 2, and after changing the orientation by 180 degrees at the same bending section 15,
By the conveyance line 14 on the opposite side, the object to be coated is conveyed from the left side to the right side in the figure with the back side facing the nozzle 2, and at the front of the nozzle 2, the object a to be coated on the conveyance line 13 on the near side is conveyed. and the conveyance line 14 on the other side.
The workpiece a is conveyed so that the workpiece a is shifted by half a pitch from the workpiece a on the front conveyance line 13, as shown by the solid line in the figure. When the paint from the nozzle 2 is applied to the surface and the rear end of the object a in the transport direction passes through the front face of the nozzle 2, the front end of the object a on the opposite side in the transport direction passes through the front of the nozzle 2. reaches the front surface of the nozzle 2, and until the next object a on the conveyance line 13 on the near side arrives, as shown by the chain line in Figure 1, the object a on the conveyance line l4 on the side facing the front side of the nozzle 2 travels, and the paint from the nozzle 2 is applied to the back side of the object a, and when the object a on the opposite conveyance line 14 passes through the front of the nozzle 2, the paint on the conveyor line 13 on the near side is applied. The object to be painted a travels in front of the nozzle 2, and by repeating this process, the surface of the object a on the transport line 13 on the near side is coated, and the back surface of the object a on the opposite side is coated on the transport line 14. are performed alternately.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view for explaining a first embodiment of the present invention, and FIG. 2 is a schematic plan view for explaining a second embodiment. 2: Nozzle 3.4: @Sending in 13.14: Conveyance line a: Object to be painted

Claims (1)

[Scope of Claims] 1. In front of a nozzle that sprays paint, two conveyance lines for sequentially conveying objects to be coated at a constant pitch are laid in parallel to each other in a direction substantially perpendicular to the paint spraying direction, On the front surface of the nozzle, the objects to be coated on each of the conveyance lines are run so that the objects to be coated on the other conveyance line are located between the adjacent front and rear objects to be coated on one of the conveyance lines. Coating method 2 in an automatic painting line characterized by applying a coating The conveying direction and conveying speed of each of the conveying lines are the same, and the objects to be coated on each of the conveying lines are arranged in a staggered manner, shifted by half a pitch from each other. Coating method 3 in an automatic coating line according to claim 1, characterized in that both of the conveyance lines form a circulation path, and the conveyance direction of each conveyance line is a reciprocating opposite direction, The automatic coating according to claim 1, characterized in that the objects to be coated on each of the conveyance lines are run so that the positions of the objects to be coated on each of the conveyance lines are shifted by half a pitch in front of the nozzle. Painting method on line