JPH07120505B2 - Neck conductive film graphite supply method and apparatus - Google Patents

Description

The present invention relates to a coating device for neck conductive film graphite of a cathode ray tube funnel, and more particularly to a method and device for supplying neck conductive film graphite.

[Conventional technology]

Conventionally, a method of coating the neck conductive film graphite on the inner surface of the neck portion of the funnel is disclosed, for example, in Japanese Utility Model Publication No. 60-187441. This will be explained with reference to FIG. 3. The mounting table 13 of the funnel 14 is connected to a cylinder 17 that moves up and down by a control switch (not shown), and when the funnel 14 rises, the outer periphery of the funnel 14 comes into contact with the receiving table 22 to stop and position it. Is performed. On the other hand, the coating sponge 7 to be inserted into the funnel 14 is connected to the tank 18 by a pipe 16 which also serves as a rotating shaft rotated by a motor (not shown) and is supported by a support base.
Mounted on the support 15, the support 15 is connected to the cam 22 so as to move up and down.

After the positioning of the funnel 14 is completed by the device as described above, a certain amount of the neck conductive film graphite is supplied to the coating sponge 7, the support base 15 is raised by the rotation of the cam 22, and the pipe 16 is rotated to rotate the coating sponge 7. While rotating, it is inserted into the neck conductive film coating portion of the funnel 14 to perform coating. In the figure, 19 is a tube, 20,
21 is a stopper and 24 is a rotary joint.

[Problems to be Solved by the Invention]

The conventional neck conductive film graphite coating device described above is designed to supply a certain amount of neck conductive film graphite to the central portion of the coating sponge 7 through the hole 23 of the pipe 16 as shown in FIG. Since the conductive film graphite has a relatively high viscosity, it is difficult for the neck conductive film graphite to penetrate to the outer periphery of the coating sponge 7,
For this reason, the peripheral portion of the coating sponge 7 has a small amount of impregnated neck conductive film graphite, and the central portion has a large amount of impregnated graphite. Since the portion which contacts the funnel 14 and performs coating is the outer peripheral portion of the coating sponge 7, when the neck conductive film graphite is supplied so that the appropriate amount of impregnation is provided in the outer peripheral portion, the amount of impregnation is centrally applied to the coating sponge 7. The neck conductive film graphite, which was too much and was not impregnated in the coating sponge 7, travels down the pipe 16 and hangs down.
It is scattered around by the centrifugal force due to the rotation of and is attached to a portion other than the coated portion of the neck conductive film graphite of the funnel 14, and particularly when it is attached to the frit seal surface, there is a problem such as a vacuum degree in a later process.

Also, as another problem, the pipe 16 is a motor (not shown).
Although it is rotated by a drive device such as, etc., since the tank 18 is fixed, a rotary joint that connects the rotating part and the fixed part to the pipe path.
24 is required, but if oil is mixed in the neck conductive film graphite, the neck conductive film graphite is repelled and normal coating cannot be performed. Therefore, lubricating oil cannot be used for the sliding portion of the rotary joint 24. In addition, since the dried and solidified fine powder of the neck conductive film graphite wears the O-ring 25 of the sliding portion of the rotary joint 24, the rotary joint 24 generally has a short life and must be replaced frequently.

An object of the present invention is to provide a method and apparatus for supplying a neck conductive graphite film that solves the above problems.

[Differences from the Prior Art of the Invention]

The present invention is different from the above-described conventional method of supplying the neck conductive film graphite in that the present invention has a supply member and supplies the neck conductive film graphite by bringing the supply member into contact with the outer periphery of the coating member.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a method for supplying a neck conductive film graphite according to the present invention is such that a funnel having a neck portion is arranged with its open end portion facing downward and a predetermined portion of an inner surface thereof. A method for supplying a conductive film graphite while applying a conductive film graphite impregnated with conductive film graphite while rotating the coating member by rotating the coating member from the open end side of the funnel to the neck side.
The neck conductive film graphite is agitated in a tank and impregnated into a movable supply member via a stirrer, and then the supply member is moved to abut the outer periphery of the coating member, whereby the supply member The impregnated neck conductive film graphite is supplied to the coating member.

Further, the neck conductive film graphite coating apparatus according to the present invention includes a tank equipped with a stirrer, a supply member arranged to be in contact with the stirrer, and the supply member is brought into contact with the coating member. And a moving member for moving the moving member, and a supply member is brought into contact with the agitator to impregnate the neck conductive film graphite, and thereafter, the supplying member is brought into contact with the coating member by the moving mechanism so that the coating member is attached. The neck conductive film graphite is supplied to the coating member by rotating.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

1 and 2 are partial sectional views showing an embodiment of the present invention.

In the figure, a tank 1 is equipped with a stirrer 2 having a cylindrical shape, which is rotated by a motor (not shown) to stir the neck conductive film graphite 3. In addition, a cylindrical supply sponge 4 is disposed above the stirrer 2 so as to abut the stirrer 2, and has a structure in which the stirrer 2 is rotated by the rotation of the stirrer 2. Since the neck conductive film graphite 3 is constantly flowing by the rotation of the stirrer 2 and the supply sponge 4,
Hard to dry and solidify.

The supply sponge 4 is moved back and forth by the cylinder 5 and is rotated 90 ° by the rotary actuator 6.

The parts other than the above-described neck conductive film graphite feeder are the same as the conventional ones.

Next, the method of supplying the neck conductive film graphite will be described in the order of operation.

The supply sponge 4 is in contact with the stirrer 2 and is rotating during standby. When the funnel is placed on a mounting table (not shown), the mounting table is raised by the control switch, and the positioning operation is started, the supply sponge 4 advances by the cylinder 5 toward the coating sponge 7 as shown in FIG. Rotate 90 ° by 6.

In this state, the supply sponge 4 is in contact with the application sponge 7 so as to press it by about 2 mm. After that, the coating sponge 7 is rotated by the motor 8 via the gears 10 and 11 and the rotating shaft 9 to impregnate the entire circumference with the neck conductive film graphite. The time for impregnating the neck conductive film graphite by the rotation of the motor 8 is about 1 to 2 seconds, but it is desirable to have a mechanism capable of adjusting the time with a timer or the like.

When the supply of the neck conductive film graphite is completed, the supply sponge 4
Returns to the standby position on the stirrer 2, and thereafter the coating sponge 7 is raised by the cylinder 12 to apply the neck conductive film graphite in the same manner as in the conventional apparatus. Since the above-mentioned supply operation is performed simultaneously during the funnel positioning operation, the cycle time of the apparatus does not become long.

〔The invention's effect〕

As described above, according to the present invention, by supplying the conductive film graphite to the outer peripheral portion of the coating sponge with the supply sponge, it is possible to reduce the amount of conductive film graphite impregnated in the central portion of the coating sponge and prevent sagging. Further, since the rotary joint is not necessary, there is an effect that the maintenance can be greatly shortened.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a neck conductive film graphite feeder of the present invention, FIG. 2 is a partial sectional view showing an operating state of the neck conductive graphite graphite feeder of the present invention, and FIG. 3 is conventional. FIG. 4 is a partial sectional view showing the apparatus for applying a neck conductive film graphite, and FIG. 4 is a sectional view showing a conventional method for supplying a neck conductive film graphite. 1 ... Tank, 2 ... Stirrer 3 ... Neck conductive graphite, 4 ... Supply sponge 5 ... Cylinder 6 ... Rotary actuator 7 ... Coating sponge, 8 ... Motor 9 ... Rotating shaft, 10, 11 …… Gear 12 …… Cylinder

Claims (2)

[Claims] 1. A funnel having a neck portion is arranged with its open end portion facing downward, and a coating member in which a predetermined portion of the inner surface is impregnated with conductive film graphite is lifted from the open end portion side of the funnel to the neck portion side. A method of supplying a neck conductive film graphite when applying a conductive film graphite while rotating by rotating, wherein the neck conductive film graphite is stirred in a tank and a movable supply member is impregnated through a stirrer, A method for supplying a neck conductive film graphite, wherein the supply member is moved to be brought into contact with the outer periphery of the coating member, thereby supplying the neck conductive film graphite impregnated in the supply member to the coating member. 2. A tank having an agitator, a supply member arranged so as to abut the agitator, and a moving mechanism for moving the supply member so as to abut the coating member. The neck conductive film graphite is impregnated by bringing the supply member into contact with the stirrer to impregnate the neck conductive film graphite, and then applying the neck conductive film graphite by bringing the supply member into contact with the application member by the moving mechanism and rotating the application member. A neck conductive film graphite supply device characterized by supplying to a member.