JPH0247818B2 - BURAUNKANNOFUANNERUSHIIRUZAITENCHAKUHOHOOYOBISOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The disclosed technology belongs to the technical field of applying and adhering a sealing material uniformly and smoothly to the face-adhesive surface of a funnel that tightly joins and fixes the face of a cathode ray tube.

Therefore, the invention of this application provides a method for applying a sealing material to the face adhesive surface of the funnel all around the surface at once and applying it uniformly without dripping, and an apparatus that is directly used in the method. In particular, a sealing material tank is fixed to a frame, and a clamped funnel is faced to the sealing material with the joint surface in a horizontal state using a lifting device.
The rotating shaft is raised from the bottom plate of the tank using another lifting device, and a horizontal coating plate is placed on the upper end of the rotating shaft, and a sealing material is applied to the upper surface of the plate through its high viscosity, once around the entire circumference of the adhesive surface of the funnel. After that, the applied plate and the adhesive surface are slightly separated and rotated relative to each other to cut off the dripping of the applied sealant, and the funnel is turned over and vibrated to remove the applied sealant. This invention relates to a method for applying a funnel sealant to a cathode ray tube so that it is uniformly smoothed, and an apparatus directly used in the method.

As is well known, the cathode ray tube 1 used in televisions, etc., has a step of joining and integrating the face 2, which serves as an image forming part, and the joint surface 4 of the funnel 3, as shown in FIG. General cathode ray tube manufacturers adopt this method.

Therefore, in order to maintain the normal function of the internal electronic device and to form a clear image on the entire surface, it is necessary that the joint at the joint surface 4 be tightly and uniformly sealed.

Therefore, as shown in FIG. 1, a sealing material 5 made of a mixture of fritted glass containing lead as a main component and solvent beagle containing isoamyl acetate as a main component in a predetermined ratio according to the surrounding air conditioning conditions is applied to the joint surface of the funnel 3. 4 is used as the adhesion surface, and is applied and adhered all around.

Up until now, the entire circumference has been applied by rotating the funnel 3 relative to a nozzle connected to a sealing material tank to apply the sealing material 5 to the adhesive surface 4.

However, due to the rotation of the funnel 3, the speed of movement differs between the substantially straight section 7 and the corner section 8 of the attachment surface 4, resulting in a difference in the thickness of the sealing material 5, which has the disadvantage of resulting in poor sealing. Moreover, since a time difference inevitably occurs between the starting point and the ending point, a difference occurs in the drying efficiency of the quick-drying sealing material, and there is a problem that a slope is formed between the joining face 2 and the funnel.

Furthermore, if the funnel size is different, the rotating device,
Alternatively, the rotation speed has to be changed, which has the disadvantage of complicating the equipment and increasing costs.

Therefore, if there is a residual seal on the jig during work, it must be removed, which requires extra man-hours and is a cumbersome inconvenience.As shown in FIG. There was also the problem that considerable skill was required to achieve a coating with a uniform and smooth surface.

The purpose of the invention of this application is to solve the problem of attaching a sealant to the face joint surface of a funnel of a cathode ray tube based on the above-mentioned prior art, by applying a sealant in the tank to the coating plate through the high viscosity of the sealant. Apply all around the attachment surface of the funnel at once,
Furthermore, by relative rotation of the application plate, the sealant itself cuts off the dripping of the applied sealant, thereby solving all of the aforementioned problems and making it possible to obtain a uniform and smooth application surface of the sealant. It is an object of the present invention to provide an excellent method for attaching a funnel sealant to a cathode ray tube and a device directly used therefor.

The structure of the invention of this application which meets the above-mentioned purpose is to bring a funnel clamped to the top lid of a sealing material tank into contact with it via a lifting device to raise the horizontal surface, and then remove the top lid and stir the sealing material. The coating plate that had been applied was brought into contact with the application surface of the funnel in a stretched state due to its high viscosity through the overflow of the sealing material on its upper surface by being lifted by the lifting device of the rotating shaft, and the application plate was applied to the entire circumference application surface at once. The sealant is applied and adhered, and the funnel and the application plate are slightly separated using a lifting device, and then rotated by a rotating device, the sealant on the application plate is used to cut off the dripping of the sealant applied to the applied surface, and the jig is dropped into the tank. After that, raise the funnel, invert it and reseal the tank from the upper lid, and apply slight vibration to the funnel to ensure that the sealant is uniform on the application surface and that there are no uneven surfaces. The gist of the present invention is to create a smooth state, to enable accurate and speedy coating and adhesion, and to be unaffected by the size and type of the funnel.

Next, an embodiment of the invention of this application will be described below with reference to FIGS. 3 and 4. Furthermore, the first and second
The same parts as those in the embodiment shown in the drawings will be described with the same reference numerals.

In FIG. 3, 6 is a sealing material attachment device which constitutes one of the gist of the invention of this application, and its frame 7
A sealing material tank 8 is fixedly installed in which a predetermined amount of a highly viscous and highly volatile sealing material 5 similar to that described above is stored.

An air cylinder 9 is installed upright on the frame 7 in parallel to the tank 8, and a top cover 12 is attached to the upper end of the operating shaft 11 having a spline 10.
The upper opening 13 is provided so that it can be opened and closed.

In addition, the pulse motor 1 also provided on the frame 7
The pinion 15 of No. 4 meshes with the spline 10 to allow the upper lid 12 to move up and down and rotate.

A rotary shaft 18 connected via a rotary joint 17 to another air cylinder 16 as a lifting device installed upright on the frame 7 has a spline 1 in the middle.
9 and a bottom plate 8' is inserted into the tank 8 through a seal 20, and a disk-shaped application plate 22 having stirring blades 21, 21 is fixedly installed.

Further, a pinion 24 of a normal motor 23 provided on the frame 7 meshes with a spline 19 of the rotating shaft 18 to allow the applicator plate 22 to move up and down and provide rotation.

Reference numeral 25 designates an air cylinder as another lifting device, and its fixed plate 26 is connected to the frame 7 via a spring 27, and a vibration pulse motor 28 equipped with an unbalancer (not shown) is installed below.

Further, the rod 29 of the air cylinder 25 is connected to a pulse motor 31 via a bracket 30, and the rotating shaft 32 of the pulse motor 31 has a clamp 34 having a handle 33 for a temporary tightening and final tightening mechanism. The neck of Funnel 3 is held in place so that it can be reversed in the normal direction.

In addition, 35 is a control device designed in a predetermined manner,
Air cylinders 9, 16, 2 depending on the setting program.
The pulse motors 14, 28, and 31 are operated with predetermined pulses.

In the above-mentioned sealing material application device 6, a predetermined amount of the sealing material 5 is stored in the tank 8, the air cylinder 9 is contracted and the upper lid 12 is closed to prevent volatilization, and the motor 23 is operated. pinion 24,
The spline 19 rotates the rotating shaft 18,
The sealing material 5 is stirred by stirring blades 21, 21, . . . to prevent caking.

Then, the funnel 3, which is intermittently conveyed by a conveyor (not shown), is inserted into the open clamp 34 and held temporarily by the handle 33, and then a start button (not shown) of the control device 35 is pressed. .

Therefore, when the air cylinder 25 is contracted and the funnel 3 is lowered and its adhesive surface 4 contacts the upper lid 12, the air cylinder 25 is stopped for a predetermined period of time due to the increase in internal pressure, and during that time the adhesive surface 4 is brought into contact with the upper lid 12. The handle 33 is fully tightened in a state in which they are in contact with each other and leveled, and after a predetermined time, the air cylinder 25 is raised by a predetermined amount to separate the funnel 3 from the upper lid 12.

Of course, the control during that time is performed by the program of the control device 35.

Therefore, under this control, the air cylinder 9 suddenly expands to move the top cover 12 away from the tank 8, and the pulse motor 14 operates a set number of pulses to rotate the top cover 12 away from the tank 8 via the pinion 15 and spline 10. and open to expose the opening 13.

Next, the air cylinder 25 is contracted again by a set amount so that the attached surface 4 of the funnel 3 faces into the opening 13, and is stopped at a set position above the liquid level of the sealing material 5.

When this state occurs, the rotation of the motor 23 is stopped, stirring is stopped, and the air cylinder 16 is extended by a set amount to cause the applicator plate 22 to rise from the liquid surface of the sealing material 5 to the surface of the liquid. As a result, the sealing material 5 overflows from the upper surface of the coating plate 22 and falls into the liquid, but is stretched over the upper surface of the coating plate 22 due to its viscosity.

In this case, if the tension sealing material 5 is formed on the convex curved surface of the coating plate 22 due to its viscosity and surface tension, it will be inconvenient for attachment. For example, it is formed into an upwardly concave shape so as to be as flat as possible.

When the applicator plate 22 is raised at the set slow speed in this manner, it comes into contact with the attachment surface 4 of the standby funnel 3 and applies the sealant 5 to the entire circumference of the attachment surface 4 at once.

Then, the air cylinder 25 stops due to the rise in its internal pressure, and is immediately lowered slightly by a set amount to separate it from the sealing material 5 coating surface 4.

In this state, the sealing material 5 is interposed in the form of a bridge between the attachment surface 4 and the upper surface of the coating plate 22 via a type of sag due to its viscosity.

Therefore, when the applicator plate 22 is slightly lowered by a set amount, the motor 23 is restarted and the applicator plate 22 is rotated by the pinion 24, spline 19, and rotating shaft 18, thereby sealing the interposed sag between the applicator plate 22 and the attachment surface 4. The material 5 is cut by the sealant 5 itself, the cut sealant 5 falls back into the sealant 5 in the tank 8, and the application plate 22 is immersed in the sealant 5 again. The stirring blades 21, 21... re-stir the sealing material 5. Therefore, the applied sealing material 5 does not sag and become uneven as shown in FIG. 4.

Therefore, the air cylinder 25 is extended to open the opening 1.
When the attachment surface 4 is raised above 3, the pulse motor 1
4 is operated in reverse for a set number of pulses to reset the upper cover 12, retract the air cylinder 9, seal the upper cover 12 to the tank 8, and operate the pulse motor 31 for a set number of pulses to reverse the funnel 3 by 180 degrees and close the attachment surface. 4 to face the upper surface, and the vibration motor 28 is operated at the same time as the reversal to slightly vibrate the funnel 3 for a predetermined period of time, thereby uniformly smoothing the applied sealing material 5 on the attachment surface 4.

Then, the clamp 34 is opened and the funnel 3 is removed.

In this manner, the sealing material 5 of the next funnel 3 is applied and attached.

It should be noted that the embodiments of the invention of this application are of course not limited to the above-mentioned embodiments. For example, the dripping seal material may be cut by rotation by raising the funnel side, or the seal material 5 may be cut by rotating the dripping seal material. Various aspects can be adopted, such as omitting the vibration to the funnel 3 to achieve natural uniform smoothing.

As described above, according to the invention of this application, the sealing material can be applied to the sealing material application surface of the face joint surface of the funnel of the cathode ray tube all at once and all around, so that the sealing material has high viscosity and high speed. Even during drying, the drying process progresses uniformly over the entire surface, and the coating is applied evenly and smoothly, resulting in an excellent effect in which the face can be accurately joined to the funnel as designed.

Furthermore, since the sealing material can be applied to the attachment surface all at once, the application work can be significantly shortened, and excellent effects can be achieved in that the efficiency of lining and work can be improved.

Furthermore, since the sealant does not adhere to jigs and equipment, there is no need to remove the remaining sealant, which not only reduces costs by reducing the number of operations, but also reduces costs by effectively using the sealant. There is also.

In addition, since the device has no restrictions on funnel size or type, there is no need for setup changes, it is easy to manage, and the facility space can be small.

By using the high viscosity of the sealing material as it moves up the coating plate in the tank, it can be placed and stretched on the upper surface of the coating plate and applied to the horizontal attachment surface, and as described above, it can be applied all at once. It has an effect that can be applied.

In addition, after coating the application surface, the funnel and the application plate are slightly separated from each other and rotated relative to each other to cut the sag formed between them through the sealing material, thereby eliminating the need for any other means or jig. It has the excellent effect of not only making it possible to cut accurately without using it, making the applied sealant uniform and smooth, but also preventing the sealant from adhering.

Further, by applying slight vibrations to the funnel after application, the applied sealing material is smoothed further, which has an excellent effect of further promoting the above-mentioned effects.

Furthermore, by providing a clamp on the lifting device attached to the sealing material tank so as to face the upper part of the tank, the clamped funnel can be easily raised and lowered into the tank.

In addition, by installing a coating plate installed inside the tank on a rotating shaft inserted through the bottom plate inside the tank and linking it to the lifting device and rotating device, it is possible to stir the sealing material in the tank while it is immersed, thereby preventing caking. It also has the effect of being able to be lifted up and placed and stretched on the upper surface of the coating plate.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of faces and funnels, Figure 2
The figure is an explanatory diagram of the state of attachment of the sealant to the attachment surface.
3 and 4 are explanatory diagrams of an embodiment of the invention of this application, FIG. 3 is a schematic explanatory diagram of the apparatus, and FIG. 4 is an explanatory diagram of sealing material dripping. 1... Braun tube, 3... Funnel, 2...
Face, 4...Adhesion surface, 5...Sealing material, 22
...Applying plate, 6...Applying device, 7...Frame,
8...tank, 25...lifting device, 34...clamp, 18...rotating shaft, 16...lifting device, 23
...Rotating device.

Claims (1)

[Claims] 1. A method for applying a sealant to the face adhesive surface of a funnel of a cathode ray tube at once without dripping, in which the adhesive surface of the funnel is kept in a horizontal state, and the sealant is applied using the viscosity of the sealant. The funnel and the coating plate are stretched over the coating plate to adhere to the entire circumference of the adhesive surface at once, and then the funnel and the coating plate are slightly separated and rotated relative to each other to cut off the sag on the adhesive surface. Features a method for attaching funnels to cathode ray tubes. 2. In a method of applying sealant to the adhesive surface of the funnel of a cathode ray tube all at once without dripping, the adhesive surface of the funnel is held horizontally, and the sealant is applied onto the coating plate using the viscosity of the sealant. Then, the funnel and the application plate are slightly separated and rotated relative to each other to cut off the sagging of the adhesive surface, and then the funnel is vibrated to apply the adhesive seal. A method for attaching funnel sealing material to a cathode ray tube, characterized by making the material uniform and smooth. 3. In a device that is directly used to attach sealant to the face adhesive surface of the funnel of a cathode ray tube all at once, an elevating device attached to a sealant tank installed in the frame moves the funnel clamp to the top of the sealant tank. A cathode ray tube having a rotating shaft inserted through the bottom plate of the sealing material tank, having a coating plate fixed to its upper end, and its lower part engaging with an elevating device and a rotating device. Funnel sealant application device.