JPS6252829A - Manufacture of exprosion-proof type cathode-ray tube - Google Patents

Abstract

PURPOSE:To simplify the processes and curtail the processing time by arranging, in front of the face panel, a spacer with an aperture left at a side and supplying unhardened resin into the gap formed by bonding the front plate with pressure and then hardening such resin. CONSTITUTION:A performed silicon rubber spacer 11 is placed along three sides of the front face 2a of face panel of cathode ray tube, the front plate 5 is placed thereon and it is then bonded with pressure using a pressure bonding jig 12. Under this condition, unhardened resin 14 which may be set by ultraviolet ray is supplied into the gap from an aperture 13, the resin 14 is hardened by irradiating it with ultraviolet ray which the front plate 5 is bonded with pressure, and the front plate 5 is then bonded to the face panel 2. The taping work may be eliminated and the aperture 13 may be provided large in size and therefore the time required for supply of resin may be curtailed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing an explosion-proof cathode ray tube in which a front plate is bonded to a face panel.

[Prior Art] Fig. 3 is a diagram sequentially showing the conventional manufacturing process of an explosion-proof cathode ray tube in which a front plate is bonded to the face panel of the cathode ray tube. It is a cathode ray tube, with (2) a face panel and (3) a funnel bulb.

First, as shown in FIG. 3(b), spacers (4) each having a predetermined width and height are placed at the four corners of the front surface (2a) of the face panel (2) of the cathode ray tube (1). Place them one by one. Next, as shown in FIG. 3(C), the spacer (
0, the face panel (2) of the cathode ray tube (1) is placed in front of the
), and an inlet member (6) is disposed between the face panel (2) and the front plate (5).
and an air vent member (7). Furthermore, after positioning the front plate (5) with respect to the face panel (2), the front plate (5) is crimped onto the spacer (4).

In this state, as shown in FIG. 3 (d), a polyester chive (8) is wound from the outer circumference (2b) of the face panel (2) to the front plate (5). At this time, the portion of the polyester tape (8) protruding from the convex side of the front plate (5) is bent to the convex side of the front plate (5), and the portion of the polyester tape (8) protruding from the convex side of the front plate (5) is , remove the portion covering the inlet member (6) and the air vent member (7), and remove the third part from the inlet member (6).
As shown in Figure (e), an adhesive resin (9) is placed in the gap between the face panel (2) and the front plate (5).
) and fill it.

After that, the inlet member (6) and the air vent member (
7), the adhesive resin (9) is cured by a method such as ultraviolet irradiation, and finally the polyester tape (
The convexly bent portion of the front plate (5) in step 8) is removed, and the surface of the front plate (5) is cleaned.

As mentioned above, since the front plate (5) is bonded to the face panel (2) with the adhesive resin (9) with a gap corresponding to the height of the spacer (4), the four cathode ray tubes (1
) can be reinforced, and even if the cathode ray tube (1) is damaged, disasters caused by broken glass during implosion can be prevented.

[Problems to be Solved by the Invention] In the conventional method for manufacturing an explosion-proof cathode ray tube as described above, an inlet member (6) and an air vent member (7) are used to inject the adhesive resin (9). In addition, in order to prevent resin leakage, a polyester tube (8) is wrapped from the outer periphery of the face panel (2b) to the front plate (5), and after the adhesive resin (9) has hardened, the polyester Many steps are required, such as removing the convexly bent portion of the front plate (5) of the tape (8), and the taping work described in 1 above requires a long time and skill. The problem was that automation was extremely difficult.

In addition, since the opening of the injection port member (6) is small, it takes a long time to inject the resin, but if you try to do this in a short time, air will get mixed into the resin and bubbles will easily occur. was.

This invention was made to solve the above-mentioned problems, and it is possible to omit the above-mentioned taping work that was an impediment to automation, simplify the process, and shorten the time required for the adhesive resin injection work. It is an object of the present invention to provide a method for manufacturing an explosion-proof cathode ray tube that can be shortened.

[Means for Solving the Problems] The method for manufacturing an explosion-proof cathode ray tube according to the present invention includes leaving an opening on one side of the front face panel of the cathode ray tube, and opening along at least the other three sides of the face panel of the cathode ray tube. A pre-formed spacer having a predetermined width and a predetermined height is placed, and a front plate is placed and crimped from the front of the spacer, thereby forming the opening in the gap between the face panel and the front plate. Inject uncured resin from
The injected uncured resin is cured.

[Function] In the present invention, the spacer is arranged on the front surface of the face panel of the cathode ray tube, leaving an opening on one side of the front surface, and along at least three other sides, and when injecting the uncured resin, the spacer Since it prevents leakage, there is no need for conventional taping work. Furthermore, since the uncured resin can be injected through the opening where the spacer is not disposed, there is no need to provide an injection port member and an air vent member as in the prior art.

[Example] An example of the present invention will be described below with reference to the drawings.

First, as shown in FIG. 1(a), pre-formed silicone rubber spacers (11) are simply placed along the three sides of the front surface (2a) of the face panel of the cathode ray tube, or
Or glue. Next, place the front plate (5) on the spacer (11) and attach the face panel (2).
After alignment with the spacer (11), as shown in FIG. 1(b), the front plate (5) is crimped to the spacer (11) using a crimping jig (12), and the front plate (6)
Keep the distance between the front plate (5) and the face panel (2) at 3 mm.In this state, with the opening (13) of the spacer (11) facing upward, insert the space between the front plate (5) and the face panel (2) from this part. Place uncured ultraviolet curing resin (1
4), and then irradiated with ultraviolet rays while the front plate (5) is pressed to harden the ultraviolet curing resin (14), as shown in FIG. 1(c).
) to the face panel (2).

In this method of manufacturing an explosion-proof cathode ray tube, the spacer (11) prevents resin leakage when the ultraviolet curing resin +1111 (14) is injected, so the conventional taping work is no longer necessary. This also eliminates the need for tape removal work. Moreover, the opening (1) of the spacer (11)
3) can be used as an inlet for the ultraviolet curable resin (14) and an air vent, instead of the conventional inlet member (B).
) (Fig. 3) and the installation of the air vent member (7) (Fig. 3) becomes unnecessary. Moreover, since the opening (13) can be made larger, the ultraviolet curing resin (14) can be easily injected, and bubbles generated during injection can be easily removed, reducing the time required for the injection work. can.

Therefore, the manufacturing process of the explosion-proof cathode ray tube can be easily simplified, labor-saving, and mechanized, and the time required for the manufacturing process can be shortened.

In the above embodiment, the spacers ('11) were arranged along three sides of the front surface (2a) of the face plate, but as shown in Fig. 2, they were arranged over four sides, leaving the opening (13). It goes without saying that the same effect as this embodiment can be obtained even if the present embodiment is used.

Furthermore, if the ultraviolet curable resin is of the radical polymerization type, it is necessary to block air, but in that case, after injecting the resin, some kind of cover may be attached to the part where the spacer (11) is not placed. Furthermore, other resins such as thermosetting resins can also be used instead of ultraviolet curable resins.

[Effects of the Invention] As described above, according to the present invention, the conventional taping work, tape removal work, and installation work of uncured resin inlet members and air vent members are no longer required, and moreover, resin injection It is easy to remove the bubbles generated at that time.

Therefore, the manufacturing process of the explosion-proof cathode ray tube is simplified, and labor-saving and mechanization are facilitated, so that the explosion-proof cathode ray tube can be manufactured efficiently.

[Brief explanation of drawings]

FIG. 1 is a manufacturing process diagram showing one embodiment of the present invention, FIG. 2 is a top view of a spacer of another embodiment, and FIG. 3 is a manufacturing process diagram showing a conventional manufacturing method. (2)...Face panel, (2a)...Front, (
5)...Front plate, (eye)...Spacer, (1
3)...Opening, (14)...Uncured resin. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A step of arranging a pre-formed spacer having a predetermined width and a predetermined height on the front surface of the face panel of the cathode ray tube, leaving an opening on one side of the front surface and along at least the other three sides; , a step of arranging a front plate from the front of the spacer and press-bonding it to the spacer, a step of injecting an uncured resin from the opening into the gap between the face panel and the front plate, and a step of injecting the injected uncured resin. A method for manufacturing an explosion-proof cathode ray tube, comprising the step of curing a resin.