CN1010627B

CN1010627B - Sealing apparatus for picture tube

Info

Publication number: CN1010627B
Application number: CN87102132A
Authority: CN
Inventors: 安田紘一
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 1986-03-19
Filing date: 1987-03-16
Publication date: 1990-11-28
Also published as: JPS62217534A; KR900002594B1; KR870009428A; CN87102132A

Abstract

To obtain a high quality sealing by providing a work head comprising a heater part driven by a drive part, and heating the whole periphery of a bulb neck part while enclosing same at the time of non-operation of an index table. A stem structure 3 on which an electron gun structure 2 is installed is mounted on a mount pin base 19a of a mount pin. The structure 2 is set with predetermined angle and height in a predetermined direction, and the mount pin 19 is raised thereafter to be inserted in a glass bulb neck part 1a and fixed at a predetermined position. Next, a work head 25 is moved ahead in the direction shown by an arrow C, and at the same time a first block heater 23a and a second block heater 23b are made open in the direction shown by an arrow B-B'. After they reached predetermined positions, they are closed and heated to a predetermined temperature while the outer surface of the bulb neck part 1a is enclosed tightly. Thus, it is possible to perform the heating work surely and effectively without being subjected to the influence of turbulance, leading to a high quality sealing.

Description

Sealing apparatus for picture tube

The present invention relates to a kind of sealing apparatus for picture tube, this sealing apparatus for picture tube is in order to seal the picture tube that has phosphor screen in it and the stem stem structure of band electron gun structure is housed.

In general, in the process of making chromoscope, be earlier phosphor screen, graphite electrode and shadow mask to be contained in the glass shell, the stem stem sealing structure that electron gun structure will be housed then is on the openend of glass enclosure tube neck portion.The patent specification that No. the 31595/1978th, Japanese patent publication promptly discloses this encapsulating method.The sealing operation of this structure picture tube needs the sealing device that is about to introduction below.

Fig. 2 is the plane structure chart of the general sealing device major part of a routine picture tube.As we can see from the figure, divide in the outer peripheral portion of plate-like turn table 10 and equidistantly to dispose a plurality of shell anchor clamps 11, under the situation of tube's axis centering in order to the above-mentioned glass shell of clamping.These shell anchor clamps 11 are rotated by the direction shown in the arrow A with the predetermined speed and the time interval by the automatic drive (not shown) with turn table 10.That is to say that each shell anchor clamps 11 is moved on on the position of each regulation in the given time interval with the height accurate way by the position shifter driving device (not shown).Usually, being configured in each shell anchor clamps 11 on the turn table 10 ties up on the position of #1 shown in Figure 2 and #2 and enters the loading and unloading stage, at the position of #3 to #8 heating tube neck portion and hermetic unit, at the position of #9 welding display pipe neck portion, melt cut is carried out in position at #10, slowly cool off position at #11 to #15, separates neck tube sheet (usually be called cullet) with above-mentioned melt-cut method from the display pipe neck portion in the position of #16.

Fig. 3 is the end view of known shell anchor clamps 11 major parts shown in Figure 2.Among the figure, shell anchor clamps 11 are such configuration, make the glass shell 1 that phosphor screen, graphite electrode and shadow mask wherein are housed be gripped on a certain existing reference position by shell clamping device 17.Shell clamping device 17 is made up of shell scotch 12, panel chuck 13, outer casing stand 14, anchor clamps mounting 15 and shell clamper 16 etc., and is fixed on the turn table 10 by support 18 supportings with the same manner.Under the situation of tube's axis centering, below shell clamping device 17, dispose mount pin 19, be furnished with the stem stem structure 3 that electron gun structure 2 is housed on the mount pin 19.This mount pin 19 can be driven stem stem structure 3 on direction of rotation and vertical direction.

Under such configuration mode, the stem stem structure 3 that electron gun structure 2 is housed ties up to and is installed under the situation about roughly regulating on the mount pin 19, mentions then and inserts among the display pipe neck portion 1a.Mount pin 19 is being adjusted a little on direction of rotation and the vertical direction and electron gun structure 2 can be placed on the predetermined height.Secondly, the outer periphery surface of the neck part 1a of flame 21 heating of sending with gas arc lamp 20 and the 3a of the core glass column sustained height of stem stem structure 3, as shown in Figure 4.Neck part 1a and the 3a of core glass column are welded to one another, thereby make this two device sealing, as the part of drawing with solid line among the figure.Meanwhile, cullet 1a ' (this cullet 1a ' is the part of dangling and the so welding) fusion with neck part 1a separates.At this moment, so the cullet 1a ' of fusion separation still stays on the installation key seat 19a of mount pin 19.Numbering 3b represents blast pipe.

In above-mentioned sealing device, for the custom-designed heater 22(of glass processing hereinafter referred to as processing head) be such fixed configurations in turn table 10 outsides, make processing head 22 leave mount pin 19 1 segment distances, unlikelyly contact with turn table 10.Processing head 22 can be equipped with gas arc lamp shown in Figure 5 20 or be equipped with the hot air equipment that the back is about to speak of.In this class device, when for example adopting the processing head shown in Fig. 6 a, the 6b and 6c, in some cases, hot-air 34 or

torch flame

44,54 are because the interference of air-flow around its week, and heat can not accurately be added to neck part 1a.In the time of need carrying out Fast Heating, the whole periphery of heating tube neck portion is advisable simultaneously, can efficiently carry out hot working at short notice like this.But said apparatus brings such shortcoming, that is, owing to can only heat from a side of neck part, shorten heating time and have any problem.In general device, as mentioned above, the heating position of display pipe neck portion 1a is subject to the influence such as factors such as external disturbance, so hot working can not highly precisely carry out, thereby also is difficult to improve firing rate.

Particularly, so-called there is not useless fragment neck part to shorten neck length in the unlikely glass shell that on glass enclosure tube neck portion 1a end or its sealing device, forms edge shape open end portion having, when adopting above-mentioned common blowtorch processing unit (plant), highly precisely only melt the top of neck part in a short period of time and the metal lead wire that do not cause flame heat to support used in electron gun is very difficult.

Fig. 6 (a) is to, 6(c) be the floor map of common process 24.Fig. 6 (a), 6(b) shown in processing head 24 prepare for preheating and annealing operation.On the other hand, the processing head 24 shown in Fig. 6 (c) is that the glass softening process is used.Fig. 6 (a) is the situation that gases at high pressure is fed hot air device 24 on the direction shown in the arrow 32.Hot air device 24 is made up of heater 33 and cylinder 31, and gas is converted into the heated air jets 34 that heating tube neck portion 1a uses in cylinder 31.In Fig. 6 (b), the direction that natural gas and AIR MIXTURES are pressed arrow 42 indications feeds in natural gas-air blowtorch 41, and mixture promptly is converted into the more weak flame 44 of heating tube neck portion 1a in this blowtorch 41.In Fig. 6 (c), the mixture of natural gas and oxygen is pressed the direction aerating oxygen blowtorch 51 shown in the arrow 42, is converted into strong flame 54 therein in order to heating tube neck portion 1a.Under the situation of above-mentioned each common process head, it is not all right the whole periphery of while heating glass display pipe neck portion 1a, has also just had any problem thereby will carry out Fast Heating.In addition, because blowtorch or hot air device system dispose to such an extent that with neck part 1a a suitable segment distance is arranged, thereby exist external disturbance, thereby can not carry out hot working expeditiously.

A main purpose of the present invention provides and a kind ofly is not subjected to the influence of external interference and so on can highly precisely carry out hot worked sealing apparatus for picture tube.

For reaching this purpose, the present invention is to provide a kind of like this sealing apparatus for picture tube, the sealing device has following each several part at least: a drive part, in order to before beginning at turn table to rotate or in processing head is shifted out outside the turn table, and after turn table stops operating, processing head is moved on on the turn table; A firing equipment is driven by drive part, and firing equipment then centers on the whole circumferential arrangement of the display pipe neck portion of each picture tube substantially, so that heat this neck part when turn table stops operating.

In other words, the invention provides the sealing apparatus for picture tube that comprises following each several part at least: the shell anchor clamps, under the situation of tube's axis centering in order to the clamping glass shell; Turn table, its neighboring partial isometry disposes a plurality of shell anchor clamps, and turn table is pressed assigned direction and is rotated every the spacing of regulation; If be configured on the turn table in mount pin, and be furnished with the stem stem structure respectively, on the stem stem structure electron gun structure be housed, the below is provided with blast pipe; Some processing heads, each processing head is in order to carry out hot working to stem stem structure and glass enclosure tube neck portion.Each and every one all is furnished with drive part these processing heads, in order to before beginning at turn table to rotate or in rotating firing equipment being moved on to outside the turn table, and after turn table stops operating firing equipment is moved on on the platform.Each processing head also is furnished with above-mentioned firing equipment, and firing equipment is driven by drive part, and centers on the whole periphery of display pipe neck portion substantially, so that heat this neck part when turn table stops operating.

In the sealing apparatus for picture tube of the present invention's body plan like this, firing equipment system is substantially around the whole periphery of display pipe neck portion, thereby this firing equipment can carry out the hot-finished tubing neck portion expeditiously and not be subjected to the influence of external interference in the blink of turn table stall.

Fig. 1 is the structural plan figure of an embodiment major part of sealing apparatus for picture tube of the present invention.

Fig. 2 is common sealing apparatus for picture tube plane graph.

Fig. 3 is the end view of shell anchor clamps major part.

Fig. 4 is the generalized section of prior art sealing processing situation.

Fig. 5 is the floor map that shows position relation between common process head and the turn table.

Fig. 6 a to Fig. 6 c is respectively the floor map of common process head.

Fig. 7 is the explanatory view of the assembly heater of one embodiment of the invention.

Fig. 8 is the explanatory view of the assembly heater inside of expression another embodiment of the present invention.

Describe various embodiments of the present invention with reference to the accompanying drawings in detail.

Fig. 1 is the plane structure chart of sealing apparatus for picture tube major part of the present invention, wherein respectively schemes identical components and parts and all uses same symbolic representation with aforementioned.Among Fig. 1, divide in the outer peripheral portion of turn table 10 and equidistantly to dispose a plurality of mount pins 19, these mount pins 19 tie up on vertical direction and the direction of rotation and are driven.Be equipped with the processing head 25 of the drive part 24 of unit heater 23 and driving unit heater 23 to be configured in turn table 10 and mount pin 19 outsides, in order to the hermetic unit of heat outer shell tube neck portion 1a, the direction by arrow C, C ' indication moves back and forth in turn table 10 beginnings with when stopping operating for 23 of unit heaters.Processing head 25 is made up of unit heater 23 and drive

part

24, and 23 of unit heaters are made up of first group of semicircle heater 23a and second group of heater 23b.Unit heater 23 is gone up folding in the direction shown in arrow B and the B ' (tangential direction of turn table neighboring), and its internal diameter equates with the external diameter of display pipe neck portion 1a substantially.Drive part 24 can and unit heater 23 reciprocating motions on the direction shown in arrow C, the C ' together, and have heat regulator with the adjustment to 600 of unit heater 23 ℃ predetermined value to 800 ℃.

Fig. 7 and Fig. 8 are the examples of unit heater.Referring to Fig. 7.The configuring condition of unit heater as we can see from the figure: eight blowtorch 61 are round neck part 1a.This class unit heater can be separated into first group of heater 63a and second group of heater 63b by mat hinge 62.Fig. 8 is the inner case of another kind of unit heater.In this unit heater, air is pressed the direction of arrow 72 indications and is introduced, in gas heated part 71, be heated to high temperature after, guided by guide card 74 to blow on the neck part 1a.This unit heater equally also can be separated into first group of heater 73a and second group of heater 73b on the direction shown in arrow B, the B '.

In said structure, the stem stem structure 3 of electron gun structure 2 is housed, as shown in Figure 3, be to be installed on the installation key seat 19a of mount pin 19.With direction, the angle of electron gun structure 2 with after highly being transferred to predetermined value, mention mount pin 19, electron gun structure 2 is inserted among the glass enclosure tube neck portion 1a, make it be fixed to preposition.And then after this step, make processing head 25(as shown in Figure 1) by the past reach of the direction shown in the arrow C, first and second groups of

heater

23a, 23b open by the direction of arrow B, B ' simultaneously.After the prerotation position of arrival with respect to the direction shown in arrow C, the C ', these

combination heaters

23a, 23b closure.In the situation that Fig. 1 solid line draws,

combination heater

23a, 23b tightly encircle the outer surface that is wrapping the display pipe neck portion, and are heated predetermined temperature.Display pipe neck portion 1a is heated the temperature value that reaches predetermined like this on schedule.The first and

second combination heater

23a, 23b open by the direction of arrow B, B ' then, at this moment processing head 24 by arrow C ' shown in direction retreat, be returned to original position.On the other hand, turn table 10 changes a step on the direction of arrow A, so just heat next display pipe neck portion (not shown) by a last same mode.Dotted line among Fig. 1 is represented processing head situation when mobile on C ' direction.

According to this configuration, because first and second groups of

heater

23a, 23b carry out hot worked part around shell pipeline neck portion is desired, and they are heated, therefore it is fully feasible will determining to carry out hot working efficiently and not be subjected to the influence (for example, by hot-air or combusted gas generant convection current) of extraneous interference in air flow.

Each processing head 25 is to be configured in turn table 10 outsides like this, makes them corresponding on the position with a plurality of mount pins 19.Like this, as long as make each processing head have different temperature each other, just might make the temperature of display pipe neck portion 1a and hermetic unit thereof be adjusted to low temperature and be adjusted to high temperature from high temperature from low temperature by grade.Therefore will efficiently carry out hot working, it is fully feasible improving the efficiency of heating surface simultaneously.This structure is specially adapted to seal has the glass shell that does not have useless broken neck part.

Can understand fully fact of Zhe sample from above-mentioned introduction, be that the present invention can produce down the effect of showing benefit: Zhuan Zhi of the present invention is provided with the processing head that some You drive parts become with unit heater Zu, before the Zhi drive part Yong is moving with Zai turn table Zhuan or beginning Zhuan unit heater is shifted out outside the turn table when moving, when the Zai turn table stops unit heater being moved on on the turn table, and drive the unit heater. Unit heater is around Zheng Zhou limit of display pipe neck portion, and the Zai turn table heats this neck part when stopping operating. You this Zhuan Zhi, just can be highly accurate mode positively be carried out High Efficiency Thermal processing, thereby is not subjected to the extraneous impact of disturbing. Can carry out high-quality sealing in addition.

Claims

1, a kind of sealing apparatus for picture tube, form by following each several part at least:

Some shell anchor clamps, under the situation of tube's axis centering in order to the clamping glass shell;

A turn table comprises a plurality of described shell anchor clamps that equidistantly are configured in platform neighboring part, and rotate along assigned direction at described turn table interval in accordance with regulations;

Some mount pins are configured on the described turn table, are furnished with the stem stem structure respectively, on this stem stem structure electron gun structure are housed, the below be equipped with blast pipe and

Some processing heads, each processing head is in order to carry out hot working to described stem stem structure and glass enclosure tube neck portion;

Described picture tube closely packed is put and is characterised in that, each described processing head is equipped with: drive part, in order to before beginning at described turn table to rotate or in described unit heater is shifted out outside the described turn table, when described turn table stops operating, described unit heater is moved on on the described turn table; Described unit heater is driven by described drive part, is centered around the almost whole periphery of described display pipe neck portion, so that heat described display pipe neck portion when described turn table stops operating.

2, the sealing apparatus for picture tube that proposes as claim 1, it is characterized in that, described unit heater is made up of two semicircle combination heaters, each internal diameter of organizing heater is identical with described display pipe neck portion basically, and the described heater of respectively organizing is substantially along the tangential direction folding of described turn table neighboring.