JPS58210875A - Underwater painting device - Google Patents

Abstract

PURPOSE:To improve the adhesion between a paint film and a substrate and to improve painting efficiency by interlocking a spatula, a press feed means for paint and a UV irradiation means, and making the paint film curale right after coating of the paint. CONSTITUTION:An underwater painting device is connected with a broad spatula 7, a press feed means for paint which feeds paint into the cavity of the spatula 7, and a UV irradiation device 9 which covers the unsolidified paint film surface coated with the spatula 7 in the irradiation range thereof in such a way as to operate cooperatively. The spatula 7 is provided with a thin slit-like opening 21 of a prescribed width at the forward end thereof and the cavity communicating with the opening in the inside. A soft end part 23 is formed at the top of the opening. While the part 23 is pressed to a substrate 2 by such device, paint is rubbed on the substrate and a prescribed paint film is obtd. The paint film is immediately cured by UV light, whereby the adhesion between the paint film and the substrate 2 is improved and painting efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underwater coating apparatus, and more particularly to an underwater coating apparatus suitable for carrying out the underwater coating method according to the patent application filed on the same day by the present inventor.

Conventional underwater painting methods involve applying putty-like underwater curable paint to the surface of the object to be coated with a spatula, or using compressed air to remove water from the surface of the object to create a coating space and then using airless spray. There are local dry methods for painting.

However, the spatula coating method is inefficient and a uniform film cannot be obtained. On the other hand, in the local dry method, the pressure inside the painting space is temporarily reduced, making it easy for water to enter from the bottom, making it difficult to remove water, and the air used to remove water scatters the painted film. However, it is difficult to maintain a predetermined film thickness, and in order to expand the coating space, a dramatic increase in power is required, making it difficult to implement equipment.

Moreover, painting using this method is complicated and inevitably reduces painting efficiency.

The present invention eliminates the above drawbacks and problems and provides a simple underwater paint curing device that does not require a painting space.
In particular, the present invention provides an underwater coating apparatus suitable for carrying out the underwater coating method according to the patent application filed on the same day by the present inventor.

That is, the present invention provides a wide spatula having a thin slit-shaped opening of a predetermined width at its tip and a cavity communicating with the opening inside, and having at least the tip portion made flexible; a paint pressure feeding means for continuously feeding paint to the
An underwater coating device characterized in that it is connected so as to cooperate with an ultraviolet irradiation device whose irradiation range covers the uncoagulated coating surface discharged from the opening and rubbed onto the surface to be coated by the spatula. It is something.

The device of the present invention pumps a pre-prepared photocurable paint into a spatula equipped with a slit-shaped opening, rubs it directly onto the object under water, and then irradiates the coated surface with a waterproof ultraviolet irradiation device. By connecting the spatula, the paint pumping means, and the ultraviolet ray irradiation device, it is possible to continuously apply the coating and rapidly cure the paint film. Peeling can be prevented, and since the irradiation distance and irradiation time can be kept constant, a uniformly cured coating film can be obtained, and the adhesion between the cured coating film and the object to be coated is also good, and coating efficiency is improved. It can be effective.

Hereinafter, the apparatus of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing an embodiment of a coating system using the apparatus of the present invention.

In Figure 1, 1 is a pedestal support installed in seawater.
An object 2 to be coated is attached to the support 1 using a fixing jig 3.

Reference numeral 4 denotes a paint tank, which contains a pre-mixed ultraviolet curable paint, and operates an air-driven paint pressure pump 5 to force-feed the paint through a vibro to a wide spatula, and then to the spatula 7. The pressure-fed paint is rubbed onto the object 2 to be coated while controlling the amount of paint discharged with the nozzle 11.The coated surface thus formed is
It is irradiated with a waterproof ultraviolet irradiation lamp 9 connected to a cord 8 from 0, and is cured. The ultraviolet irradiation lamp 9 and the housing 7 are connected by a connection fixture 12.

During the above painting, by adjusting the opening degree of the valve 11 added to the spatula 7 and keeping the discharge amount constant,
The amount of paint discharged remains constant without pulsation.

Further, the pipe diameter of the above-mentioned vibro is determined by the viscosity of the paint, the pumping distance, and the pressure loss, and the material thereof is preferably flexible and corrosion-resistant (eg, fluororubber, etc.).

FIGS. 2(A) to 2(C) are diagrams showing the configuration of one embodiment of the spatula. FIG. 2(A) is a front view, FIG. 2(B) is a side view, and FIG. 2(C) is a bottom view.

As shown in FIGS. 2(A) to 2(C), the spatula 7
The structure is such that the slit width S1 of 1 and the gap G with respect to the object 22 to be coated are kept constant, and by pressing the flexible tip 23 against the object 22 and rubbing it at a predetermined speed, a predetermined film thickness is achieved. is now available.

FIGS. 3(A) to 3(C) are diagrams showing the configuration of one embodiment of the ultraviolet irradiation device 9. FIG. 3(A) shows the shutter 33
3(B) shows the shutter 35 in the closed state, and FIG. 3(C) shows the structure of an example of the ultraviolet irradiation lamp 31 in cross section.

As shown in FIGS. 3(A) and 3(B), the ultraviolet irradiation device 9
has a reflector 32 of a lamp 31 and a shutter 33, and the reflector 32 is made of, for example, aluminum so that the ultraviolet rays are effectively focused on the surface of the object to be irradiated. shutter 3
3 is constructed so that it can be opened and closed to increase, decrease, or block ultraviolet rays when slowing down the coating speed or temporarily stopping irradiation, and any type of system such as a sliding type or a rotating type can be adopted. As shown in FIG. 3(C), the lamp 61 has a cooling jacket 64, and the cooling jacket 34
The inside has a cooling structure using air or water 35, and maintains the function of adjusting the amount of air or water to prevent the temperature of the inside of the lamp 31 and the walls from rising.

Further, the system of the ultraviolet irradiation device 9 is waterproofed (for example, sealed) at the connection points to prevent leakage or other problems that may occur during underwater operation. In addition, a safety device (interlock mechanism) is installed in case the ultraviolet irradiation lamp experiences an abnormal temperature rise and to prevent electric shock, and the irradiation intensity is set so that the coating film can be cured according to the painting speed. shall have the following.

As described in detail above, by connecting and interlocking the spatula 7, the paint pumping means 4 to 6, and the ultraviolet irradiation means 8 to 1°, the coating film can continue to be rapidly cured after the paint is applied. The cured coating film is prevented from peeling off from the surface of the object to be coated due to waves, etc., and the irradiation distance and irradiation time between the ultraviolet irradiation device 9 and the surface of the object to be coated can be kept constant, resulting in a uniform cured coating. is obtained, and the adhesion between the cured coating film and the object to be coated is good, resulting in effects such as increased coating efficiency.

Next, examples using the apparatus of the present invention will be described.

Example 70 parts by weight of an acrylic modified epoxy resin (prepolymer), 30 parts by weight of a polymerizable monomer (2-hydroxyacrylate), and 30 parts by weight of a coloring pigment (yellow lead), and a photosensitizer. (benzoyl impropyl ether) 1 part by weight, curing catalyst (decanoyl peroxide) [1
1,05-0.07 parts by weight and curing accelerator (cobalt naphthenate and/or dimethylamide) 0.01-0
．． UV-curable paint (viscosity 3000-5000'CPS) formulated with a curing component consisting of 0.7 parts by weight
The device of the present invention (Pa4 Pro...) shown in Figures 1 to 3
・Fluororubber %B10m, spatula 7 slit width S...
・With 10(7)), while controlling the discharge amount with valve 11, flat steel plate (1000X'10D
OX 2t, base treatment 5a = 2.5 ((Swedi
sh S standard In5ti tute
5a = 2.5 means the degree of surface treatment that removes approximately 95% of black scale and other deposits by sandblasting, glysothod blasting, or shotblasting). 0.25 Apply in the morning,
Subsequently, the coated surface was irradiated with a waterproof ultraviolet irradiation device 9 (irradiation lamp 2KIv1 irradiation interval 100 to 150 seconds, irradiation time 8 to 10 seconds).

As a result, the coating film was completely cured, and the adhesion between the cured coating film and the flat steel plate was good (50 Kq/cm2 or more compared to the required strength of 20 Kg/crn2).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the device of the present invention, and FIG.
Figures (A) to (C) are diagrams showing one embodiment of the spatula 7,
FIG. 2(A) is a front view, FIG. 2(B) is a side view, FIG. 2(C) is a bottom view, and FIGS. 3(A) to (C) are one embodiment of the ultraviolet irradiation device 9. FIG. 3(A) shows the Nyatta 33 in a closed state, FIG. 3(B) shows the Nyatta 33 in an open state, and FIG. 6(C) shows an example of the ultraviolet irradiation lamp 31. FIG. Sub-agents 1) Meiji agent Ryo Hagiwara - 415 Figure 2 (A) 416-

Claims (1)

[Claims] 1. A thin slit-shaped opening with a predetermined width is formed at the tip, and a cavity communicating with the opening is provided inside, and at least the tip is made flexible.1. a wide spatula, a paint pressure feeding means for continuously feeding paint into the cavity of the spatula, and an irradiation range of the uncoagulated paint surface that is discharged from the opening and rubbed by the spatula onto the surface to be coated. An underwater coating device characterized in that an ultraviolet irradiation device contained therein is connected so as to work together.