JPH0414151Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a curtain flow coater, and in particular, it is capable of producing a uniform coating film without uneven coating on stiff plates such as thin steel plates and thin plywood. This invention relates to an improved flow coater that can be formed.

(Prior Art) Curtain flow coaters are widely used for the purpose of efficiently and uniformly coating plate-shaped objects.

However, in conventional curtain flow coaters, the device for transporting the plate to be coated is fixed in a horizontal position, which makes it difficult to handle steel plates with a thickness of 0.5 mm or less.
Materials where the tip of the board tends to sag downward, or materials that tend to curve downward from the beginning, have the disadvantage that the tip of the board hits the transition fitting of the curtain flow coater during painting, resulting in uneven coating. . If you set the conveyor belt for the board to be painted in a high position in advance, you can prevent uneven coating at the tip, but the rear end of the board will fall down the uneven part.
There was a problem with uneven coating near the rear end of the board.

(Problems to be solved by the invention) The present invention solves the above problems and is capable of uniformly coating even weak materials such as thin steel plates. It provides a coater.

(Means for solving problems) The present invention will be described in detail below with reference to the drawings.

First, as shown in FIG.
The distal end portion 3 is configured to rotate and rise upward using the fulcrum as a fulcrum. The structure is not particularly limited, but as an example, as shown in FIG.
The easiest method is to make it descend. The amount of rise is usually about 1 to 10 mm, and it is better to be able to regulate the rise position with a separately provided stopper metal fitting.

A photocell 7 installed on the belt detects a plate 8 to be coated that is sent intermittently, and activates an air cylinder 6 to detect the tip of the plate before it reaches the paint curtain. raise the
After the tip of the plate to be coated enters the paint curtain, the air cylinder is actuated in the opposite direction to return the tip of the belt to the horizontal position.

The speed at which the belt returns is determined by the length and passing speed of the object to be coated, but it is important that the return operation be performed slowly and smoothly by the action of the air regulator. It is also necessary to return to the horizontal position before the rear end of the plate passes.

Note that the vertical movement of the belt does not necessarily have to be done by using an air cylinder, but may be done by a mechanical method using a motor or by using hydraulic pressure.

(Function) Since the tip of the carry-in belt is raised just before the plate 8 to be painted passes through the paint curtain, even if the plate is a weak plate that tends to sag downward, the tip 9
Since the conveyor belt does not hit the crossing metal fittings, etc., and the leading end of the carry-in belt returns to the horizontal position before the rear end of the board passes, the rear end of the board passes smoothly and no shock occurs.

(Effects of the invention) Even with weak materials such as thin steel plates or materials whose edges are curved downward, they can pass through the painted area smoothly without any impact, eliminating shot marks, curtain breaks, and uneven coating. A uniform painted surface can be obtained without causing any stains. Moreover, this effect continues stably.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing an embodiment of the present invention, Figure 2 is a schematic diagram showing an embodiment of the present invention.
The figure is a schematic diagram showing the state when the plate to be coated passes the tip of the carry-in belt. 1... Carrying belt, 2... Roll shaft at the rear end,
3... Tip of carry-in belt, 4... Roll bearing at tip of carry-in belt, 5... Flat base, 6... Air cylinder, 7... Phototube, 8... Board to be painted, 9...
...The tip of the plate to be painted.

Claims (1)

[Scope of utility model registration request] In a curtain flow coater, the tip of the conveyor belt for the plate to be coated has a structure that allows it to rotate upwards using the rear end of the conveyor belt as a fulcrum, and the tip rises when the plate to be coated enters the paint curtain. A curtain flow coater for thin plates, characterized in that the curtain flow coater for thin plates gradually descends as the plate to be coated passes, and returns to a horizontal position when the plate to be coated passes.