CN1387217A

CN1387217A - Panel screen forming device for CRT, and panel screen formed therewith

Info

Publication number: CN1387217A
Application number: CN02120151A
Authority: CN
Inventors: 张泰斗
Original assignee: KOREA ELECTRICAL GLASS CO Ltd
Current assignee: KOREA ELECTRICAL GLASS CO Ltd
Priority date: 2001-05-21
Filing date: 2002-05-21
Publication date: 2002-12-25
Also published as: KR20020088744A; KR100432769B1

Abstract

The inventionprovides a CRT flat panel forming apparatus and the CRT flat panel formed by using the same to suppress distortion and bending of the flat panel. The CRT flat panel forming apparatus and the CRT flat panel formed by using the same, in the CRT flat panel, the accommodation portion has a side wall which is inclined to have an obtuse angle with respect to the bottom surface of the accommodation portion.

Description

Panel screen forming device for CRT and with the flat screen dish of its shaping

Technical field

The present invention relates to panel screen forming device for CRT and with the cathode-ray tube flat screen dish of its shaping, particularly improve lower die shape panel screen forming device for CRT and with the cathode-ray tube flat screen dish of its shaping.

Background technology

Usually, cathode ray tube comprises: the screen dish of display image; Be incorporated into the funnel shaped cone at screen dish rear; And the neck that combines with cone.The screen dish comprises: the phosphor screen portion of display image; And from rearward crooked skirt section, the end of phosphor screen portion.

Common cathode-ray tube screen dish, front surface phosphor screen portion forwards forms agley, and the whole increase in space is set, and has the very difficult shortcoming of image recognition of angular zone.Therefore, the flat screen dish of use with the front surface phosphor screen portion flattening of screen dish proposed recently.But if merely make the phosphor screen portion flattening, then the mechanical strength of cathode ray tube descends, and during vacuum treatment, has the danger of the junction surface breakage of screen dish and cone in manufacturing process.Consider such problem, use recently and remove the flat screen dish in skirt section.

As shown in Figure 4, existing cathode-ray tube flat screen dish 210 is shaped with Square consisting of two isosceles right-angled triangles shape roughly, comprises upper face 212, lower surface 213 and connects side 214 between them.In the angle of lower surface 213 and side 214 cooperations, form oblique angle, bottom 218, in the angle of upper face 212 and side 214 cooperations, form upper bevel 216.

As shown in Figure 5, the flat screen dish building mortion that flat screen dish 210 is shaped comprises: the bearing 280 of going up configuration at rotatable rotating disk (not shown); But and with respect to the drift (not shown) of bearing 280 upper and lower settings.

Upper end at bearing 280, the lower die 270 that lower surface 213, oblique angle, bottom 218 and side 214 with flat screen dish 210 form is set, in the upper end of lower die 270, the metal-back mould 260 of the four square ring shape shapes that configuration forms the upper bevel 216 of flat screen dish 210.In addition, in the inboard of metal-back mould 260, be provided with can be up and down formpiston 250, the glass blocks that are provided in the lower die 270 are compressed, so that flat screen dish 210 is shaped.

According to such structure, if from glass melting path (not shown) glass blocks is put in the lower die 270, then formpiston 250 pressurizes to lower die 270 declines and to glass blocks.By the pressurization of formpiston 250, the refrigerating work procedure of flat screen dish 210 through stipulating at lower die 270 and metal-back mould 260 internal shapings moves to the so back operation of grinding step.

But, in existing like this panel screen forming device for CRT, the internal side wall of lower die 270 is got the form of approximate right angle with respect to the internal backplane surface of lower die 270, so from the shaping of flat screen dish 210 during through refrigerating work procedure, as shown in phantom in Figure 4 (for convenience of explanation, exaggeration diagram), exists the end regions of flat screen dish 210 to produce protuberance torsion phenomenon, make problem for the decrease in efficiency of the grinding steps of protrusion with respect to middle section.

Summary of the invention

Therefore, the object of the present invention is to provide the panel screen forming device for CRT that can suppress to reverse with buckling phenomenon.

In addition, purpose of the present invention also is to provide the cathode-ray tube flat screen dish that suppresses to reverse with buckling phenomenon.

To achieve these goals, according to the present invention, provide a kind of panel screen forming device for CRT, this device comprises: the lower die that forms the accommodation section that holds glass blocks; But and come being contained in the glass blocks pressurization of described lower die, thereby the formpiston that described flat screen dish is shaped with respect to described lower die upper and lower settings; It is characterized in that: the sidewall of described accommodation section is formed obliquely in obtuse angle with respect to the base plate face of described accommodation section.

Here, described inclination preferably has 0.1 ° to 10 ° angular range with respect to vertical axis.

On the other hand, according to another field of the present invention, described purpose realizes by cathode-ray tube flat screen dish, it is characterized in that, this cathode-ray tube flat screen dish is by 1 described panel screen forming device for CRT manufacturing, comprise the lower surface and the side of the upper face that is shaped by described formpiston and the accommodation section shaping by described lower die, described side is formed obliquely in obtuse angle with respect to described lower surface.

Here, with respect to vertical axis 0.1 ° to 10 ° angular range to be arranged be favourable in the inclination of described side.

Description of drawings

Fig. 1 is the sectional arrangement drawing of cathode-ray tube flat screen dish of the present invention;

Fig. 2 is the partial longitudinal section of panel screen forming device for CRT of the present invention;

Fig. 3 is the enlarged drawing in Fig. 2 ' A ' zone;

Fig. 4 is the sectional arrangement drawing of existing cathode-ray tube flat screen dish;

Fig. 5 is the partial longitudinal section of existing panel screen forming device for CRT;

Embodiment

Below, present invention will be described in detail with reference to the accompanying.

As shown in Figure 1, the cathode-ray tube flat screen dish 10 of the present invention side 14 that has the upper face 12 that forms by Square consisting of two isosceles right-angled triangles shape roughly and lower surface 13 and between them, form.

In the angle of lower surface 13 and side 14 cooperations, form oblique angle, bottom 18, in the angle of upper face 12 and side 14 cooperations, form upper bevel 16.Side 14 by sidewall 74 formation of lower die 70 described later, can prevent the torsion phenomenon (with reference to Fig. 2) of flat screen dish 10 with respect to lower surface 13 inclination in obtuse angle.

As shown in Figure 2, the panel screen forming device for CRT of the present invention that such flat screen dish 10 is formed comprises: be disposed at the bearing 80 on the rotatable rotating disk (not shown); And the drift (not shown) that can be provided with like that up and down bearing 80.

In the lower end area of drift, combine with drift actuator 20, combine with formpiston head 30 in the bottom of drift actuator 20.In formpiston head 30, form the cooling fluid allocation space 53 of formpiston head 30, can getting off to combine integratedly with formpiston head 30, the formpiston 50 of the forming face 51 that forms with the upper face 12 that has formed flat screen dish 10 combines.

Cooling fluid allocation space 53 forms depression to adding pressure surface 51 after glass blocks be shaped to finish, do not cool off like that and add pressure surface 51 so that the flat screen dish 10 that is shaped is not melted in the forming face 51 of formpiston 50.In addition, in cooling fluid allocation space 53, fluid dispensing components 40 is set, supplies with cooling fluid, be ejected into cooling fluid allocation space 53, make formpiston 50 coolings from formpiston head 30.

In the inboard of fluid dispensing components 40, form from the fluid containment space 41 that upside is subside downwards, the bottom section in fluid containment space 41 forms a plurality of lug bosses 43 that separate predetermined distance mutually side by side, so that combine with formpiston head 30.In the adjacent area of each lug boss 43, run-through board face and form fluid through-hole 45.In the middle section of fluid dispensing components 40, form fluid discharge path 47 to separate with fluid containment space 41, make and discharge the cooling fluid that makes formpiston 50 coolings by fluid through-hole 45.

In the middle section of formpiston head 30, what form cooling fluid returns stream 39, so that be communicated with the fluid discharge path 47 of fluid dispensing components 40 along axis direction, return stream 39 around, a plurality of fluid feed paths 38 of convection cell spatial accommodation 41 being supplied with cooling fluids with return stream 39 configuration radially side by side.

In the upper end of bearing 80, the lower die 70 of the lower surface 13, oblique angle, bottom 18 and side 14 shapings that make flat screen dish 10 is set, at the upside of lower die 70, the metal-back mould 60 that configuration is shaped the upper bevel 16 of flat screen dish 10.Metal-back mould 60 has roughly four square ring shape shapes, is disposed at the upper end of lower die 70 in compression molding equipment selectively.

As shown in Figure 3, the accommodation section of lower die 70 that holds glass blocks is along with there are backplate surface 73 and sidewall 74 in its position, the cant angle theta that sidewall 74 forms in obtuse angle with respect to backplate surface 73.As shown in Figure 1, this is that inhibition may occur in reversing and buckling phenomenon in the flat screen dish 10 because form the cant angle theta of regulation in the side 14 of flat screen dish 10.At this moment, with respect to vertical axis 0.1 ° to 10 ° scope to be arranged be favourable to the cant angle theta that is formed at the sidewall 74 of lower die 70.

The sidewall 74 of such lower die 70 can form when the manufacturing of lower die 70, also can process the sidewall 74 of already used lower die 70 to form.At this moment, the tilt length of sidewall 74 can suitably be regulated according to the different cultivars of the flat screen dish 10 that is shaped.

By such structure, if drop into glass blocks from glass melting road (not shown) in lower die 70, then formpiston 50 pressurizes to glass blocks to lower die 70 declines.By the pressurization of formpiston 50, the refrigerating work procedure of flat screen dish 10 through stipulating at lower die 70 and metal-back mould 60 internal shapings moves to the such back operation of grinding step.

At this moment, in the sidewall 74 of lower die 70, form the cant angle theta of regulation, so the side 14 of the flat screen dish 10 of the press molding by formpiston 30 also forms the cant angle theta at obtuse angle with respect to lower surface 13.Therefore, after shaping, through in the process of refrigerating work procedure, can be suppressed at position, different angle, improve the efficient of grinding step because of reversing and bending that different cooling rate differences produces at flat screen dish 10.

So, according to the present invention, by with the sidewall 74 of the accommodation section of lower die 70 to form the bad generation of the flat screen dish 10 that can suppress to be shaped with respect to backplate surface 73 cant angle theta in obtuse angle.

As mentioned above, according to the present invention, provide the panel screen forming device for CRT that can suppress to reverse with buckling phenomenon.

In addition, according to the present invention, provide the cathode-ray tube flat screen dish that can suppress to reverse with buckling phenomenon.

Claims

1. panel screen forming device for CRT, this device comprises: the lower die that forms the accommodation section that holds glass blocks; But and come being contained in the glass blocks pressurization of described lower die, thereby the formpiston that described flat screen dish is shaped with respect to described lower die upper and lower settings;

It is characterized in that the sidewall of described accommodation section is formed obliquely in obtuse angle with respect to described accommodation section base plate face.

2. panel screen forming device for CRT as claimed in claim 1 is characterized in that, described inclination has 0.1 ° to 10 ° angular range with respect to vertical axis.

3. cathode-ray tube flat screen dish, it is characterized in that, by the described panel screen forming device for CRT manufacturing of claim 1, comprise the lower surface and the side of the upper face that is shaped by described formpiston and the accommodation section shaping by described lower die, described side is formed obliquely in obtuse angle with respect to described lower surface.

4. cathode-ray tube flat screen dish as claimed in claim 3 is characterized in that the inclination of described side has 0.1 ° to 10 ° angular range with respect to vertical axis.