JPH02198662A - Ultraviolet curing type resin coating device - Google Patents

Abstract

PURPOSE:To apply ultraviolet curing type resin to the parts in a short time by blowing air to the goods being carried to remove dust and successively applying ultraviolet curing type resin thereto and furthermore irradiating the goods with ultraviolet rays and on the other hand, always supplying clean air to both a coating booth and an irradiation chamber. CONSTITUTION:In the case of applying ultraviolet curing type resin to the parts 4 prevented from being stuck with dust, the parts 4 are carried by a conveyor 1. Clean air is blown to the carried parts 4 in a clean air shower chamber 5 provided with an air blowing means 8 for removing dust stuck on the goods 4. Furthermore ultraviolet curing type resin is applied to the parts 4 which have been free from dust and are carried in a coating booth 6 provided with the resin coating means 10, 15. Further the parts 4 which have been coated with ultraviolet curing type resin and are carried are irradiated with ultraviolet rays in an irradiation chamber 7 equipped with the ultraviolet-rays irradiating means 16. Clean air is supplied to the coating chamber 6 and the irradiation chamber 7 respectively by the air supplying means 11, 12.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention applies to parts constituting electronic equipment and precision equipment.
The present invention relates to an apparatus for coating an ultraviolet curable resin to prevent attached dust from falling off.

(Prior art and problems to be solved) When dust adheres to the parts that make up a hard disk device, this dust falls off inside the device and gets between the disk and the head.
There was a problem that the head could be damaged or damaged.

For this reason, the standards for dust adhesion to parts of this type of device are very strict, and for example, the degree of dust adhesion is inspected using a microscope with high magnification.

By the way, conventionally, after parts are ultrasonically cleaned, all work such as assembly and inspection is performed in a clean room to prevent dust from adhering. However, in order to perform all the work in a clean room, a large lean room is required, which has the drawback of requiring a large amount of equipment costs.

Therefore, a small clean room is prepared for inspection, and parts are cleaned outside the clean room, assembled, cleaned again, and then transported into the clean room only for inspection. However, when cleaning the device after assembling the device, it is difficult to remove dust, and therefore, a great deal of effort and time is required to inspect the degree of dust adhesion.

Recently, after removing the dust from a part, the surface of the part is coated with an epoxy resin, and the coating resin is used to prevent the dust adhering to the surface from falling off. However, epoxy resins require time to cure; for example, it takes 24 hours or more to cure at room temperature. In addition, this resin was heated to 100°C.
Even when curing by heating to a moderate degree, it takes about 1 to 2 hours. For this reason, there is a drawback that dust may adhere to the parts again until the resin hardens.

The present invention has been made in view of the above points, and an object of the present invention is to provide an ultraviolet curable resin coating device that can coat components with ultraviolet curable resin in a short time to prevent dust from adhering to them. It is something to do.

(Means for Solving the Problems) The present invention transports parts to be prevented from attracting dust by a conveyor, and during the transport, cleansing air is blown onto the parts by an air blowing means in a clean air shower room. After removing dust, the parts are coated with ultraviolet curable resin using a resin coating means in the coating chamber, and then the parts are irradiated with ultraviolet rays using the ultraviolet irradiation means in the irradiation chamber. It is characterized by supplying clean air.

(Operation) Dust is removed from the parts by blowing clean air, and the parts are continuously coated with ultraviolet curing resin and then irradiated with ultraviolet light, thereby coating the parts with a resin film in an extremely short time.

Therefore, any small amount of dust remaining on the parts is covered with the ultraviolet curing resin film and prevented from falling.

Furthermore, since the resin film is coated in a short time, it is possible to reliably prevent dust from adhering to the parts afterwards.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall configuration diagram of an ultraviolet curable resin coating apparatus according to the present invention.

In FIG. 1, 1 indicates an endless belt conveyor. This belt conveyor 1 is a belt car 2 on the moving side.
and the belt pulley 3 on the driven side, and the driving side belt pulley 2 is driven in the direction of the arrow by a drive motor and a speed reduction mechanism (not shown).

Partition protrusions 1a are provided at equal intervals on the outer peripheral surface of the belt conveyor 1.
A component 4 constituting a hard disk device or the like is arranged between the partition projections 1a. A clean air shower room 5, a coating room 6, and an irradiation room 7 are provided above the belt conveyor 1. These clean air shower room 5, coating room 6, and irradiation room 7 each have a belt conveyor 1.
The lower part facing the is open.

A spray nozzle 8 for spraying clean air downward is arranged in the clean air shower room 5, and the spray nozzle 8 is attached to the lower end of the air supply pipe 9.

A resin dripping part 10 is arranged in the coating chamber 6, and the resin dripping part 1
0 is attached to the lower end of the resin supply pipe 11. A resin tank 13 is connected to the upper end of the resin supply pipe 11 via a solenoid valve 12.
are connected, and the resin tank 13 contains an ultraviolet curing resin (
Hereinafter referred to as UV resin) 14 is filled. Also,
A rotary coating brush 1 is provided below the resin dripping portion 10 of the coating chamber 6.
5 is placed. This rotary coating brush 15 is rotationally driven in the direction of the arrow by a drive motor (not shown), and coats the surface of the component 4 with the UV resin 14 dripped from the resin dripping section 10 .

An ultraviolet irradiator 16 is arranged within the irradiation chamber 7. The ultraviolet irradiator 16 is made of a tungsten bulb, a high-pressure mercury lamp, or the like, and includes a power source 16a and a switch section 16b connected in series.

The upper end of the air supply pipe 9 is communicated with the filter chamber 17, and the filter chamber 17 is further connected to an air branch pipe 18.
19 are connected. One air branch pipe 18 is connected to the upper end of the resin supply pipe 11 via a solenoid valve 20. The other air branch pipe 19 is connected to the upper end of the air supply pipe 22 via a solenoid valve 21.
The lower end of 2 penetrates the earthen wall of the irradiation chamber 7. The filter chamber 17 is made of HEPA (High Efficiency P
A filter 23 (articulate Air) is arranged,
and an air pressure pump (not shown) via the solenoid valve 24.
It is connected to the. A certain amount of clean air is fed from the air pump to the filter chamber 17, and the HEPA filter 23 filters the fed air more cleanly. That is, for example, 99.97% of particles with a diameter of 0.3 μm in the air are removed.

Next, the operation of the UV resin coating apparatus of the present invention will be explained.

First, the solenoid valves 20, 21, 24 and 12 are controlled to open by a control section (not shown). Therefore, the air fed from the air pressure pump is transferred to the filter 23 of the filter chamber 17.
The air is filtered through the air supply pipe 9 and both air branch pipes 18.
It will be distributed to 19 people. Therefore, clean air is blown downward in the clean air shower room 5 by the blowing nozzle 8. Furthermore, since clean air is supplied to the coating chamber 6 and the irradiation chamber 7 through the resin supply pipe 11 and the air supply pipe 22, respectively, the pressure inside the coating chamber 6 and the irradiation chamber 7 is slightly higher than the outside pressure. This prevents dust from entering the interior.

On the other hand, when the electromagnetic valve 12 is controlled to open, the UV resin 14 in the resin tank 13 passes through the resin supply pipe 11 together with clean air and is dripped onto the rotating application brush 15 from the resin dripping part 10. Therefore, the rotating coating brush 15 is quantitatively replenished with the UV resin 14. And UV resin 14
The rotating application brush 15 to be replenished is rotationally driven by a drive motor (not shown).

Next, the belt conveyor 1 is driven in the direction of the arrow, and the parts 4 are continuously supplied and placed on the belt conveyor 1. Therefore, the component 4 is first transported to the clean air shower room 5, where it is blown with clean air at a constant pressure by the spray nozzle 8. Therefore, most of the dust adhering to the surface of the component 4 is blown away and removed.

The parts 4 from which dust has been removed or to which a small amount of dust has adhered are then conveyed to the coating chamber 6, where UV resin 14 is applied by a rotary coating brush 15 that is rotationally driven.

The component 4 coated with the UV resin 14 is then placed in the irradiation chamber 7.
, where it is irradiated with ultraviolet light by an ultraviolet irradiator 16. That is, when the component 4 is transported to the irradiation chamber 7, the component 4 is detected by a position detector (not shown), and the control section closes the switch section 16b based on the detection signal, so that the ultraviolet irradiator 16 is activated. , is irradiated with ultraviolet light. Therefore, since the UV resin 14 on the component 4 hardens immediately after being applied, for example, within a few seconds, the component 4 coated with the UV resin 14 can be transported to a clean room and inspected before dust adheres to it. can.

(Effects of the Invention) As explained above, according to the present invention, while parts are transported by a conveyor and clean air is always supplied to the coating chamber and the irradiation chamber, air is first supplied in the clean air shower chamber. Clean air is blown onto the parts using a spraying means to remove dust. Next, UV resin is applied to the parts using a resin coating means in the coating chamber, and then ultraviolet rays are applied to the parts using an ultraviolet irradiation means inside the irradiation chamber. By using irradiation, parts can be coated with UV resin in a short time. Therefore, it is possible to prevent dust from adhering to the component while the resin film is curing.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a UV resin coating apparatus according to the present invention. 1.---1---Belt conveyor, 4------1-1 part, 5------Clean air shower room, 6---
---------Application chamber, 7---------Irradiation chamber, 8--------One spray nozzle, io----One resin dripping part, 14---- 1---UV resin, 5---1---rotating coating brush, 6---UV irradiator. (1 other person)

Claims (1)

[Claims] This is a device for coating parts with ultraviolet curable resin to prevent dust from adhering to them, and includes a conveyor that transports the parts, and a device that sprays clean air onto the parts being transported to remove dust adhering to the parts. a clean air shower room having an air blowing means for removing the dust; a coating room having a resin coating means for applying an ultraviolet curable resin to the parts from which the dust has been removed and being transported; An ultraviolet curable resin coating comprising: an irradiation chamber having an ultraviolet irradiation means for irradiating ultraviolet rays onto parts being transported; and an air supply means for supplying clean air to the irradiation chamber and the coating chamber. Device.