JPS607957A - Both-faces coating device - Google Patents

Abstract

PURPOSE:To form simultaneously coating films on two surfaces at a prescribed film thickness by dipping a plate-shaped member under rotation into a dip tank then rotating the plate-shaped member at a high speed in a cover. CONSTITUTION:A plate-shaped member such as a disc 9 or the like is attached to the holding part 8 of a revolving shaft 7 and a dip tank 14 contg. a coating liquid 15 is relatively approached to the plate-shaped member to dip said member under rotation into the tank 14. The unnecessary coating liquid can be scattered by approaching a cover 17 to the plate-shaped member and rotating said member at a high speed in the cover 17. Then coating films are simultaneously formed on the two surfaces at a prescribed film thickness.

Description

[Detailed description of the invention] The present invention relates to a coating device that can coat surfaces simultaneously.

Structure of the conventional example and its problems As shown in Fig. 1, the conventional coating device takes the disk 2 at the tip fR of the rotating shaft 1 installed in the vertical direction. The coating liquid was applied through a nozzle 3.With this configuration, only one side could be coated at a time, and if double-sided coating was required, the same process would have to be repeated twice. Furthermore, when applying a hard coating to the surface of a plastic disc, for example, if the coating is applied to one side at a time, the disc warps when the coating solution hardens, posing a quality problem.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a coating device that can simultaneously coat both sides.

The present invention includes a holding part for a carved plate-like member, a dip tank containing a certain amount of coating liquid, a moving means for relatively moving the dip tank and a rotating shaft, and a holding part 77 held by the holding part, and a cover arranged to cover the side of the plate-shaped part, and by immersing the plate-shaped member in the dip tank while rotating,
After coating both sides of the plate-shaped part (2 coating liquids), the plate-shaped member is rotated at high speed within the cover to scatter unnecessary coating liquid, thereby simultaneously coating both sides with a predetermined film thickness. can be formed, which is very advantageous in terms of shortening the manufacturing process and improving product quality.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Second
The figure shows the shape of the product in this example, and the discs are optical discs made of plastic, with a mounting hole in the center.

6 is a coating film to increase the hardness of the surface and prevent scratches, and is coated with a uniform thickness from slightly outside the center hole to the outermost periphery. FIG. 3 is a central sectional view of the coating device in this embodiment, where γ is a rotating shaft and 8 is a holding portion into which the disk 9 can be accessed.

1Q is a main body frame, 11 is a motor, and 12 is a tacho energizer for controlling the rotation speed.

The rotation of the motor 11 is transmitted to the rotating shaft by a timing belt 13. 14 is a dip tank in which a coating liquid 15 is contained, and is heated by an air cylinder 16.
The disk 9 is immersed in the coating liquid 16 by going up and down. 1
The cover is used to prevent the coating liquid from scattering when the disc 9 is rotated at high speed. In addition, the north part can be divided into two parts, and the lower part can be removed during coating work. FIG. 4 shows a more detailed explanation of the dip tank portion, where 18 is a dip tank, 19 is a coating liquid, and 2o is an overflow tank. 21 is a blow-off nozzle that constantly supplies the coating liquid into the tip tank, and 22 and 23 are outlet ports for discharging from the bottom of the dip tank and the overflow tank, respectively.

24 is a slide bearing, 26 is a slide shaft, and 26 is an air cylinder, which is a driving source for vertical movement of the dip tank. 27
A pump circulates the coating liquid, and the coating liquid passes through the filter 28 while being circulated. 29 is a disk, and 30 is a rotating shaft. Reference numeral 31 denotes a swash plate, which forms an angle of 15° to 30° with the plane containing the disk. The coating liquid splashed from the disk collides obliquely with the swash plate 31, and its reflection is directed toward the disk in the direction C ( 32 is a splash prevention ring 11, which prevents the coating liquid adhering to the swash plate 31 from falling onto the disc. 33 is an outer room, and a splash prevention ring 11 prevents the coating liquid from falling onto the disk. The relatively large droplets that are filled with liquid droplets or atomized coating liquid flow downward and are discharged from the train 36, and the mist-like ones are discharged from the upper exhaust port 36. 34 are both sides of the disk 29. The opening is provided facing the exhaust IZI 35, and the provision of the opening allows for smooth air flow and assists in discharging the atomized coating liquid from the exhaust IZI 35 mentioned above.

In this embodiment, air cylinders are used to drive the upper and lower sides of the dip tank, but other means such as a feed screw may also be used. Furthermore, depending on the configuration of the apparatus, the disk may be immersed in the coating liquid by moving the dip tank up and down or by lowering the rotating shaft by 4 degrees.

In addition, in this example, the disc can be written several times, but
As long as it is plate-shaped, other shapes, such as polygons, may be used.

Furthermore, in this embodiment, a structure is shown in which one overflow tank is arranged outside the dip tank, but as shown in FIG. If the flow part can be made larger than the plate part A, the seventh
As shown in the figure, it may be formed in one piece and may be configured to move during application.

Effects of the Invention As described above, according to the present invention, since the plate-like member attached to the rotating shaft rotated in the horizontal direction is immersed in the coating liquid in the dip tank, both sides can be coated at the same time. Further, by providing the cover with an inner wall, a splash prevention ring, an opening, an exhaust port, and a liquid drain, it is possible to prevent liquid from splashing around the plate-shaped member during high-speed rotation. From the above, it is possible to obtain a high-quality coating film with good surface conditions and no warping of the disk due to single-sided coating, and the effect is outstanding.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a conventional coating device, FIG. 2 is a cross-sectional view of a product in an embodiment of the present invention, FIG. 3 is a cross-sectional view of a coating device in an embodiment of the present invention, and FIG. An explanatory diagram showing a dip tank and a circulation and filtration device for a coating solution according to an embodiment of the present invention, FIG. 5 is a sectional view of the same spin cover, FIG. 6 is an explanatory diagram of another dip tank, and FIG. FIG. 3 is a cross-sectional view of the integrated cover. 4...Cover, 39...Blowout nozzle,
40... Outlet, 41... Circulation route,
42...Pump, 43...Filter,
47I---Plate member, 45-・Rotating shaft, 46
......Integrated cover. Name of agent: Patent attorney Masao Nakao and 1 other person No. 1
Figure 6.5 Figure 3 Figure 4 Figure 6 @ Figure 7 Ku3:=0>

Claims (4)

[Claims] (1) A rotating shaft provided horizontally, a driving means for driving this rotating shaft, a holding part for holding a plate-shaped part provided at the tip of the rotating shaft, and a fixed path of coating liquid. A double-sided coating device comprising a dip tank, a moving means for moving the dip tank and a rotating shaft relative to each other, and a cover arranged to cover a plate-like member held by the holding section. (2) The dip tank is composed of at least two tanks, and a circulation path is provided so that the coating liquid flows openly from one tank to the other tank, and a pump and a filter are provided in the circulation path. Double-sided coating device as described in section. (3) The cover includes a swash plate having an inclination angle with respect to the plate-shaped portion, a splash prevention ring provided on the swash plate, an opening formed in the center, and an outer peripheral portion. A double-sided coating device according to claim 1, further comprising an exhaust port and a drain. (4) The double-sided coating device iI' according to claim 1, wherein the cover has a structure that can be separated into at least two parts.