CN1750223A - Glass article for cathode ray tube and its producing method - Google Patents
Glass article for cathode ray tube and its producing method Download PDFInfo
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- CN1750223A CN1750223A CN 200510103928 CN200510103928A CN1750223A CN 1750223 A CN1750223 A CN 1750223A CN 200510103928 CN200510103928 CN 200510103928 CN 200510103928 A CN200510103928 A CN 200510103928A CN 1750223 A CN1750223 A CN 1750223A
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Abstract
A chamfer angle part (8) between a skirt section lateral side (9) and a sealed head face (5) of a panel (1) is formed by a curved surface (8r), or more than two planes (8p) or the combination of the curved surface (8r) and the plane (8p); in a longitudinal cross-section, the chamfer angle part (8) protrudes outside further than a virtual line (L1) connecting a point of intersection (8a) between the sealed head face (5) and the chamfer angle part (8) and a point of intersection (8b) between the skirt section lateral side (9) and the chamfer angle part (8); the chamfer angle part (8) is made into an unfocused surface and the sealed head face (5) is made into an abrasive surface. In addition, an inclined angle theta1 of a connecting part (8a) of the chamfer angle part (8) relative to the sealed head face (5) is more than 2 degrees and less than 30 degrees.
Description
Technical field
The present invention relates to a kind of glass article for cathode ray tube and manufacture method thereof, specifically, relate to a kind of glass article for cathode ray tube and manufacture method thereof that constitutes by glass screen that forms chamfered section between skirt section lateral surface in the zone that comprises diagonal axis at least and the involution end face or glass awl.
Background technology
As everyone knows, color TV is subjected to the cathode ray tube that uses in the display unit of camera etc., as the parts based on glass, possesses: projection publish picture picture glass screen for cathode ray tube (below, be called for short panel) and roughly funnelform glass bulb for cathode-ray tube (below, be called for short funnel).
As shown in Figure 6, panel 1 has: possess display image active area approximate rectangular face portion 2 and be interconnective four the limit shape side wall portions 3 of boundary member with diagonal axis DA, and constitute skirt section 4 by these limit shape side wall portions 3.And the front in skirt section 4 is covered by the face portion 2 with tubular axis Z quadrature, is present in simultaneously on the openend OPP at rear in this skirt section 4, is formed for carrying out with funnel the involution end face 5 of involution.In addition, the way till from mixing R portion 6 that the outer surface of face portion 2 is connecting to the involution end face 5 of the lateral surface in skirt section 4, form maximum object line (mold match line: molded match lines) 7.
As shown in Figure 7, funnel 10 has circular little openend OPS on the big openend OPL that has rectangle on the end of tubular axis Z direction and the other end, and on big openend OPL, is formed with the involution end face 11 that is used for carrying out with panel involution.And from then on 11 of involution end faces are to the positions of maximum object line (molded match lines) 12, and constituting with diagonal axis DA is the skirt section 14 that boundary member has interconnective 4 limit shape side wall portions 13.In addition, funnel 10 be approximate funnelform side wall portion, main body (body) portion 15 that possesses big openend OPL one side with these main part 15 integrated yoke that is connected (yoke) portions 16.Moreover, in Fig. 6 and Fig. 7, represent minor axis with the straight line that symbol SA represents, represent major axis with the straight line that symbol LA represents.
The panel 1 and the funnel 10 that constitute by said structure, all by as compacted under: in the extrusion modling operation, holding in the mould (former) of constituting by bottom die (substrate mould) and side mold (mould circle), be provided with fused glass block (below, the title grume), and to it push with pressing mold (formpiston).Then, fused glass block is shaped to after the regulation shape, promotes formpiston, implements cooling effect, make panel 1 or funnel 10 (being glass ware forming product specifically) appropriateness solidify, after the mould circle is taken off, from the substrate mould, these glass ware forming product are taken out again as their blank.At this moment, be formed on the forming surface that plays the drape forming till the maximum object line 7,12 of its lateral surface from the involution end face 5,11 of panel 1 or funnel 10 on the mould circle.
Yet, in the cathode-ray tube sphere that panel 1 and funnel 10 usefulness scorification frit (frit glass) involutions are produced, when making its inside form cathode ray tube for high vacuum, owing to be applied to the vacuum stress that produces on the cathode ray tube because of atmospheric pressure, maximum near the involution end face 5,11 of panel 1 and funnel 10, thereby will be as the criterion can obtain to bear the necessary sealing strength of this vacuum stress, decide the wall thickness of the involution end face 5,11 of panel 1 and funnel 10.
In addition, the involution end face 5,11 of panel 1 and funnel 10 is as the criterion with both sealing strength that can fully obtain to be obtained by the scorification frit, forms tabular surface in the zone in its whole week.And the flatness of these involution end faces 5,11 only has so that situation about guaranteeing with the extrusion modling of above-mentioned mould circle and by after this extrusion modling these involution end faces 5,11 being ground situation about guaranteeing.
On the other hand, because panel 1 and funnel 10, pass through various operations during this section till by involution playing both from finishing of extrusion modling, therefore under the situation of they being processed, carrying when also having various the use certainly etc., this involution end face 5,11 contacts with miscellaneous part or the possibility that rubs will strengthen.And, because by the Outboard Sections of the involution end face 5,11 of panel 1 and funnel 10, be the lateral surface in skirt section 4,14 and the bight that involution end face 5,11 forms, mechanical strength is especially weak, therefore generation microlesion or depression easily.
And, in the involution operation of panel 1 and funnel 10,, can produce thermal stress on the lateral surface of the two the across corner in involution end face 5,11 and concentrate because of the face portion 2 of panel 1 is approximate rectangular.When this thing happens, for panel 1, follow this thermal stress to concentrate can take place with above-mentioned microlesion or depression etc. is the crack of starting point, and in temperature-rise period, develop by this crack, spread all over each limit shape side wall portion 3 from across corner or its periphery of involution end face 5, triangle taper real estate is given birth to damaged, and the phenomenon that so-called triangle breaks takes place.In addition, for funnel 10, in temperature-fall period, follow above-mentioned thermal stress to concentrate, can produce problem of cracks.
Have again, in possessing the panel 1 of face portion 2 that the radius of curvature that forms the outer surface on the diagonal axis DA is the active area more than the 10000mm, with the involution operation of funnel 10 in temperature-rise period in, can be that rectangle and its outer surface are flattened because of face portion 2, the thermal stress that produces on the outside portion of the across corner of involution end face 5 is concentrated and is tending towards significantly, and the possibility raising that above-mentioned triangle breaks takes place.
For fear of this problem, in patent documentation 1 (spy opens the 2003-197127 communique), disclose: on the outside portion in the regulation zone that comprises the diagonal axis DA in the involution end face 5 of panel 1, form chamfer bevel portion (oblique angle face), and make that the angle of inclination of the relative involution end face 5 of this chamfer bevel portion is more than 30 ° below 60 °.
Yet as shown in Figure 8, angle of inclination (exterior angle) θ 1 of the relative involution end face 5 of the chamfered section 8 in the panel 1 (funnel 10 is too), preferably less basically.Thus, because chamfered section 8 becomes big with angle (interior angle) θ 1 ' that involution end face 5 is, so last difficult microlesion or the depression etc. of taking place of its bight (connecting portion) 8a, in above-mentioned temperature-rise period, help preventing the development in crack.
Yet new on the other hand problem is: because above-mentioned involution end face 5, when involution, must guarantee necessary Rack, therefore shown in pecked line among this figure, if do not reduce the width of its involution end face 5, and when dwindling the tilt angle theta 1 of relative involution end face 5 of chamfered section 8, because the tilt angle theta 2 of the relative skirt section lateral surface 9 of chamfered section 8 becomes big, therefore can produce microlesion or depression etc. by the two 8,9 bight that forms (connecting portion) 8b is last.
If consider this situation, in the method in the above-mentioned patent documentation 1 on the disclosed this outside portion that will be formed on the involution end face by the skewed chamfered section that tabular surface constitutes, want the bight 8a that is formed by involution end face 5 and chamfered section 8 and these both sides of bight 8b that formed by chamfered section 8 and skirt section lateral surface 9, what effectively prevent microlesion and depression simultaneously at one stroke is very difficult.
Having, forming under the situation of this chamfered section 8, also is problem as in abradant surface and the unfocused surface which for the best with involution end face 5 and chamfered section 8.Promptly, panel 1 and funnel 10, use a plurality of shaped devices that constitute by the substrate mould that has illustrated, mould circle and formpiston to make owing to be, and glass weight also each all has small difference, and the cooling effect after the moulding is not certain enforcement etc., therefore, the shape of involution end face 5,11 has inequality.If consider this point, preferably grind involution end face 5,11 undoubtedly.In this case, if consideration is then thought chamfered section is also ground better by grinding with the excision of involution end face, by the width (area) of this excision change chamfered section.
Yet under except the situation that the involution end face is also ground chamfered section, grinding work becomes very trouble with complicated, not only causes the skyrocketing of complicated and manufacturing cost of the manufacturing process of panel and funnel, also can prolong the activity duration.And whether this problem is not can be merely to solve by implementing to grind, and can be described as with the dependency structure of involution end face and chamfered section inseparable.
Summary of the invention
The present invention just in view of the above problems, its purpose is: with the involution end face of panel and funnel and the dependency structure optimization of chamfered section, reduce the generation of microlesion and depression etc. as far as possible.
The 1st technical scheme that proposes in order to solve the problems of the technologies described above, it is a kind of glass article for cathode ray tube, constitute by glass screen with following characteristics or glass awl, in described glass screen or glass awl, have with diagonal axis as boundary member, and on the openend in the skirt section of interconnective each limit shape side wall portion, possesses the involution end face, form chamfered section between skirt section lateral surface in the zone that comprises diagonal axis at least and the involution end face, it is characterized in that: described chamfered section, is constituting by flexure plane or plural plane or flexure plane and plane with the involution end face with shape on the shortest direction that is connected of skirt section lateral surface, and in the longitudinal cross-section, its chamfered section and with the intersection point of described involution end face and chamfered section, compare more laterally with the dummy line that the described skirt section lateral surface and the intersection point of chamfered section couple together and to bloat, and described chamfered section is a unfocused surface, described involution end face is an abradant surface.Have, the what is called among the present invention " longitudinal cross-section " is the plane of many normals that comprise maximum relatively object line on the arbitrfary point on the maximum object line again.
At this moment, the zone that preferably comprises above-mentioned diagonal axis is that the diagonal axis from the involution end face is towards the scope below the above 100mm of involution end face long side direction central portion side 5mm of each limit shape side wall portion.Thereby above-mentioned chamfered section can only form in this scope, or also can spread all over forming in whole week of involution end face.Have, above-mentioned chamfered section can only form between involution end face and skirt section lateral surface again, or also can be between involution end face and skirt section medial surface therewith the position form together.
By this structure, because chamfered section, by than the flexure plane that the intersection point of involution end face and chamfered section and dummy line that the skirt section lateral surface is connected with the intersection point of chamfered section are outwards bloated, being combined to form of perhaps plural plane or flexure plane and plane, therefore the angle of inclination of connecting portion of the relative involution end face of chamfered section can be dwindled, and the angle of inclination of connecting portion of the relative skirt section lateral surface of chamfered section can be dwindled.Thereby, no matter for which of the connecting portion of the connecting portion of chamfered section and involution end face and chamfered section and skirt section lateral surface, all be difficult for taking place defectives such as microlesion or depression, thereby in can the temperature-rise period when implementing the involution of panel and funnel, reduce producing the possibility of breaking on possibility that triangle that the crack causes breaks and the funnel on the panel as far as possible.And, because to make chamfered section be unfocused surface and make that the involution end face is an abradant surface, therefore need not chamfered section is implemented grinding operation, can shorten the time of making panel and funnel and reduce cost.Have again, owing to make chamfered section become above-mentioned form, therefore the area size that can guarantee chamfered section is abundant, even thereby make chamfered section cut by the involution end face is ground, the area deficiency that also can not cause chamfered section, and can keep the angle of inclination of the corresponding involution end face of chamfered section less, the sand belt that can reduce the involution end face be given the harmful effect of chamfered section.
The 2nd technical scheme that proposes in order to solve the problems of the technologies described above, be a kind of glass article for cathode ray tube, constitute by glass screen with following characteristics or glass awl, in described glass screen or glass awl, have with diagonal axis as boundary member, and on the openend in the skirt section of interconnective each limit shape side wall portion, has the involution end face, form chamfered section between skirt section lateral surface in the zone that comprises diagonal axis at least and the involution end face, it is characterized in that: described chamfered section, with involution end face and shape on the shortest direction that is connected of skirt section lateral surface be by, constituting of flexure plane or plural plane or flexure plane and plane, and in the longitudinal cross-section, its chamfered section and with the intersection point of described involution end face and chamfered section, compare more laterally with the dummy line that the described skirt section lateral surface and the intersection point of chamfered section couple together and to bloat, and the angle of inclination of the connecting portion of the relative involution end face of described chamfered section is more than 2 ° and less than 30 °.
By this structure, because the basic configuration of chamfered section is identical with the 1st above-mentioned technical scheme, and the chamfer bevel of the connecting portion of the corresponding involution end face of chamfered section is less than 30 °, therefore can be when making this angle of inclination enough little, because of chamfered section is the shape that illustrated, can also dwindle the angle of inclination of connecting portion of the corresponding skirt section lateral surface of chamfered section.In this case, no matter for the connecting portion of chamfered section and involution end face, and which of the connecting portion of chamfered section and outside portion, skirt section for, defectives such as microlesion or depression also be difficult for to take place, and can reduce producing the probability that produces the crack on probability that the crack causes that triangle breaks and the funnel on the panel as far as possible.At this moment, though the angle of inclination of the connecting portion of the corresponding involution end face of preferred chamfered section is 0 °, but owing to no matter be panel or funnel, be not under the effect of reason such as certain enforcement cooling effect after using that a plurality of shaped devices that are made of the substrate mould that has illustrated, mould circle, formpiston etc. are made, having nuance, moulding between the glass weight individuality, the shape of involution end face can produce inequality, therefore will grind the involution end face eliminates this inequality and makes that this angle of inclination is 0 °, can grind required time change thus can increase, instead become problem.And, if make this angle of inclination, then can't obtain sufficient amount of grinding near 0 °, feasible flatness as the original purpose of grinding is difficult to realize.Thereby,, make that this angle of inclination is more than 2 ° for fear of the problems referred to above.Moreover the angle of inclination of the connecting portion of the relative involution end face of the chamfered section on the involution end face under the situation of the flexure plane of connection chamfered section is meant the angle of the relative involution end slope of tangent line of the connection end of the past involution end face of flexure plane.
In this structure, the angle of inclination of the connecting portion of the relative skirt section lateral surface of preferred chamfered section is less than 50 °.
So, because not only the angle of inclination of the connecting portion of the relative skirt section lateral surface of the connecting portion of the relative involution end face of chamfered section, chamfered section also can be positively reduced, so defectives such as above-mentioned small damage of more difficult generation and depression.
Above structure, the radius of curvature that is preferably applied to cover the outer surface on the diagonal axis of face portion of front in skirt section is the above glass screen for cathode ray tube of 10000mm.
This glass screen is being implemented in the temperature-rise period in the involution operation with funnel, and because of the outer surface of its face portion is flattened, the thermal stress that produces in the outside portion of the across corner of involution end face is concentrated and is tending towards remarkable.Thereby, for this panel,, then can suitably control the generation that so-called triangle breaks if prevent the generation of above-mentioned microlesion and depression etc., its effect is obvious.
To make the involution end face in the above structure be abradant surface and make that chamfered section is the glass screen and the glass awl of unfocused surface, the maximum overall dimension on the diagonal axis, is the size along the direction of diagonal axis on the molded match lines, is the situation advantageous particularly more than the 500mm.
Promptly, if the size of panel and funnel increases, because glass wall thickness (wall thickness of involution end face) thickening, the other also length of side of length of the tube axial direction in skirt section, change in size is obvious in the thick cooling procedure of extrusion modling, if only implement the flatness that molding procedure is difficult to guarantee the involution end face.Thereby, if maximum overall dimension on diagonal axis is in the large-scale panel and funnel more than the 500mm, their involution end face is ground, then can guarantee the face width and the surface accuracy of good involution end face.
The 3rd technical scheme that proposes in order to solve above-mentioned technical problem is, a kind of manufacture method of glass article for cathode ray tube, this glass article for cathode ray tube is made of glass screen with following characteristics or glass awl, in described glass screen or glass awl, have with the diagonal axis and be boundary member and on the openend in the skirt section of interconnective each limit shape side wall portion, have the involution end face, form chamfered section between skirt section lateral surface in the zone that comprises diagonal axis at least and the involution end face, it is characterized in that, comprising:
Molding procedure, use as the counterdie circle, the shape that is the moulding face of the described chamfered section of moulding in the forming surface is, on the shortest direction that is connected in position with the position of corresponding involution end face and corresponding skirt section lateral surface, be flexure plane or plural plane or flexure plane and planar combination, and in the longitudinal cross-section, its chamfered section and with the intersection point at position with the position of corresponding chamfered section of the described involution end face of correspondence, compare more with the dummy line that the intersection point at the position of corresponding chamfered section couples together with the position of the described skirt section of correspondence lateral surface and to bloat, come moulding glass screen or glass awl with such mould circle to foreign side; Simultaneously, grinding step after implementing this molding procedure, grinds the described involution end face that glass shields or glass is bored.
By this formation, constitute the part (being equivalent to the involution end face) on the basis of the chamfered section that has illustrated, by moulding face moulding with the mould circle by the part of the chamfered section before grinding.At this moment, at the moulding face of the part on the basis that correspondence is constituted the chamfered section in the mould circle, only use under the situation that for example arc surface of radius R (flexure plane) forms preferred 0.8mm≤R≤30mm.That is,, easily produce defectives such as microlesion on the moulding position of this forming surface subordinate's glass if radius R less than 0.8mm, then can become sharp keen shape because of above-mentioned moulding face.Relative therewith, if radius R surpasses 30mm,, easily produce defectives such as microlesion on this bight then because the connecting portion of the connecting portion of chamfered section and involution end face and chamfered section and skirt section lateral surface forms bight (edge).Thereby preferred radius R is within above-mentioned number range.If therefore consideration above-mentioned, more preferably 2mm≤R≤10mm.
And, because in the manufacture method of this panel and funnel, implement after the molding procedure, the grinding step that enforcement is ground the involution end face, thereby the chamfered section that makes panel and funnel is not for grinding and making that the involution end face is an abradant surface, therefore for the corresponding therewith structure in above-mentioned the 1st technical scheme, can obtain the action effect identical with the main points that illustrated.
As mentioned above by the present invention, owing to can dwindle the angle of inclination of connecting portion of the corresponding involution end face of chamfered section simultaneously, and these both sides of angle of inclination of the connecting portion of the corresponding skirt section lateral surface of chamfered section, therefore no matter for chamfered section will with the connecting portion of involution end face, and which of the connecting portion of chamfered section and skirt section lateral surface, all be difficult for producing defectives such as microlesion, in the involution operation of panel and funnel, reduce in the temperature-rise period to produce the crack on the panel and cause the possibility that triangle breaks as far as possible, lead the possibility that produces the crack in the but process on the funnel in addition.And, even the involution end face is ground, the degree of not only damaging above-mentioned advantage is also lighter, and can also obtain the advantage that makes that because of the involution end face is ground surface accuracy improves, have again owing to can make that chamfered section is a unfocused surface, therefore can reduce and make the required time of panel and funnel and reduce cost.
Description of drawings
Fig. 1 is to represent the longitdinal cross-section diagram of the key position of the glass article for cathode ray tube (panel) in the 1st execution mode of the present invention.
Fig. 2 is to represent the longitdinal cross-section diagram of the key position of the glass article for cathode ray tube (panel) in the 2nd execution mode of the present invention.
Fig. 3 is to represent the longitdinal cross-section diagram of the key position of the glass article for cathode ray tube (panel) in the 3rd execution mode of the present invention.
Fig. 4 is to represent the longitdinal cross-section diagram of the key position of the glass article for cathode ray tube (panel) in the 4th execution mode of the present invention.
Fig. 5 is that expression is with the longitdinal cross-section diagram of the key position of the shaped device of above-mentioned glass article for cathode ray tube (panel) moulding.
Fig. 6 is to represent the stereogram of common glass article for cathode ray tube (panel).
Fig. 7 is to represent the stereogram of common glass article for cathode ray tube (funnel).
Fig. 8 is to represent the longitdinal cross-section diagram of the key position of existing glass article for cathode ray tube.
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.Fig. 1～Fig. 4 is the longitdinal cross-section diagram of the key position of representing the panel in the 1st～the 4th execution mode of the present invention, and Fig. 5 is the longitdinal cross-section diagram of the key position of the shaped device of this panel of expression moulding.Moreover, because the structure that relates to panel shown in Fig. 1～Fig. 5 for funnel too, therefore hereinafter, only keeps the explanation about panel, omit diagram and explanation about funnel.In addition, the structure of panel and funnel is identical with the structure shown in the structure shown in the Fig. 6 that has illustrated and Fig. 7, Fig. 8 of having illustrated in addition basically.Thereby, when counter plate describes below, suitably use the symbol of each inscape of the panel of mark among Fig. 6 and Fig. 8, and omit its detailed explanation.
Fig. 1 is for representing the involution end face 5 of the panel 1 in the 1st execution mode of the present invention and the longitdinal cross-section diagram of the skirt section lateral surface 9 the shortest states that are connected.Chamfered section 8 as shown in the drawing, as to form between the involution end face 5 of this panel 1 and the skirt section lateral surface 9 only is made of circular-arc flexure plane 8r.And, this chamfered section 8, the dummy line L1 with intersection point (connecting portion) 8b of chamfered section 8 bloats to foreign side than intersection point (connecting portion) 8a that connects involution end face 5 and chamfered section 8 and skirt section lateral surface 9.At this moment, the angle θ 3 that above-mentioned dummy line L1 and involution end face 5 are is set at less than 135 °.
Have again, the tilt angle theta 1 of the connecting portion 8a of the relative involution end face 5 of chamfered section 8, the tilt angle theta 1 of the tangent line L2 of ends chamfering 8 (flexure plane R), involution end face 5 one sides specifically, get 30 ° with interior (in preferred 20 °) and the angle in the scope of (lower limit also can be 5 °) more than 2 °, get in the present embodiment about 15 °.In addition, though the gradient (gradient of tangent line L3) of the connecting portion 8b of the relative skirt section lateral surface 9 of chamfered section 8 for getting final product less than 50 °, is got 0 ° in the present embodiment.
And chamfered section 8 and skirt section lateral surface 9 are the unfocused surfaces that only obtain with molding procedure, and involution end face 5 is by the unfocused surface 5x shown in the pecked line that obtains with molding procedure is ground the abradant surface of formation.At this moment, the unfocused surface 5x with pecked line is represented is connected on the chamfered section 8 by circular-arc flexure plane 5x1 smoothly from involution end face 5 one sides, thinks and so can guarantee good mouldability under the molding procedure.
Have again, the panel 1 in the present embodiment, the radius of curvature of the outer surface on the diagonal axis DA of the face portion 2 of the front in covering skirt section 4 is more than the 10000mm, the maximum overall dimension on the diagonal axis DA of panel 1 is more than the 500mm in addition.Have, the chamfered section 8 of form shown in Figure 1 though can spread all over the forming in whole week of involution end face 5 of rectangle, also can not spread all over and whole week forms and form on the given area that comprises diagonal axis DA again.
By the panel 1 that adopts this structure, no matter for which of the connecting portion 8b of the connecting portion 8a of involution end face 5 and chamfered section 8 and skirt section lateral surface 9 and chamfered section 8, all be difficult for producing microlesion or depression etc., can also guarantee its flatness and surface accuracy by grinding involution end face 5 simultaneously.And, not only can guarantee the good mouldability under the molding procedure as mentioned before, and only 5 enforcement grindings get final product to the involution end face, have realized the high efficiency of the making operation of panel 1.
Fig. 2 is the longitdinal cross-section diagram (longitdinal cross-section diagram of corresponding diagram 1) of the key component of the panel 1 in expression the 2nd execution mode of the present invention.Panel 1 in this 2nd execution mode, be with the difference of panel 1 in above-mentioned the 1st execution mode: the position of skirt section lateral surface 9 one sides of chamfered section 8, plane (tabular surface) 8p that has the tilt angle theta 2 about 45 ° for relative skirt section lateral surface 9, and the position (end periphery) of involution end face 5 one sides of chamfered section 8, the circular-arc flexure plane 8r that has the tilt angle theta 1 about 15 ° for relative involution end face 5.And the unfocused surface 5x that only obtains with molding procedure is connected this point on the chamfered section 8 from involution end face 5 one sides smoothly by circular-arc flexure plane 5x1; Only involution end face 5 is this point of abradant surface; And, the angle θ 3 that dummy line L1 and involution end face 5 were set less than 135 ° this point etc., identical with above-mentioned the 1st execution mode.Thereby the panel 1 in this 2nd execution mode also can obtain and the identical action effect of above-mentioned the 1st execution mode.
Fig. 3 is the longitdinal cross-section diagram (corresponding to the longitdinal cross-section diagram of Fig. 1) of the key position of the panel 1 in expression the 3rd execution mode of the present invention.Panel 1 in this 3rd execution mode, be with the difference of panel 1 in above-mentioned the 1st execution mode: the position of skirt section lateral surface 9 one sides of chamfered section 8, the plane 8p that has the tilt angle theta 2 about 15 ° for relative skirt section lateral surface 9, and the position of involution end face 5 one sides of chamfered section 8, be the plane 8p that relative involution end face 5 has the tilt angle theta 1 about 15 °, the connecting portion that two plane 8p, 8p are arranged again is circular-arc flexure plane 8r and is connecting two plane 8p, 8p smoothly.And the unfocused surface 5x that only obtains with molding procedure is connected this point on the chamfered section 8 from involution end face 5 one sides smoothly by circular-arc flexure plane 5x1; Only involution end face 5 is this point of abradant surface; And, the angle θ 3 that dummy line L1 and involution end face 5 were set less than 135 ° this point etc., identical with above-mentioned the 1st execution mode.Thereby the panel 1 in this 3rd execution mode also can obtain and the identical action effect of above-mentioned the 1st execution mode.
Fig. 4 is the longitdinal cross-section diagram (corresponding to the longitdinal cross-section diagram of Fig. 1) of the key position of representing the panel 1 in the 4th execution mode of the present invention.Panel 1 in this 4th execution mode, be with the difference of panel 1 in above-mentioned the 1st execution mode: the position of skirt section lateral surface 9 one sides of chamfered section 8, the plane 8p that has the tilt angle theta 2 about 15 ° for relative skirt section lateral surface 9, and the position of involution end face 5 one sides of chamfered section 8, be the plane 8p that relative involution end face 5 has the tilt angle theta 1 about 15 °, the connecting portion that two plane 8p, 8p are arranged again is kink 8c.And the unfocused surface 5x that only obtains with molding procedure is connected this point on the chamfered section 8 from involution end face 5 one sides smoothly by circular-arc flexure plane 5x1; Only involution end face 5 is this point of abradant surface; And, the angle θ 3 that dummy line L1 and involution end face 5 were set less than 135 ° this point etc., identical with above-mentioned the 1st execution mode.Thereby the panel 1 in this 4th execution mode also can obtain and the identical action effect of above-mentioned the 1st execution mode.
Have again,, also can connect plane more than 3 respectively by each bend or kink though the 3rd above-mentioned execution mode and the 4th execution mode are to connect 2 plane 8p, 8p by bend 8r or kink 8c.
The longitdinal cross-section diagram of the key position of the shaped device that the panel 1 (panel 1 in for example above-mentioned the 1st execution mode) that Fig. 5 only is made of circular-arc flexure plane 8r chamfered section 8 for expression uses when carrying out extrusion modling.As shown in the drawing, this shaped device 20 in the former 24 that is made of substrate mould 21 and mould circle 22, is supplied with grume (gob), and by with formpiston 24 it being pushed and forming surface plate 1 (being the glass ware forming product as its blank specifically).At this moment, on the mould circle 22, formation will be played the forming face 22a of the drape forming till the maximum object line 7 of skirt section lateral surface 9 from involution end face (unfocused surface) 5x of panel 1.Having, with the facial 22b of the moulding of chamfered section 8 moulding of panel 1, is to be that the arc surface (flexure plane) of (preferred 2mm is above and 10mm is following) more than the 0.8mm and below the 30mm forms by radius R only among the forming surface 22a of this mould circle 22 again.And after the extrusion modling (comprising cooling processing etc.) carried out of shaped device 20 finished thus, the state shown in the solid line was as the criterion among Fig. 1 for example to form, and by grinding the unfocused surface 5x of involution end face, makes this involution end face become abradant surface 5.
Moreover, replace this chamfered section 8, when forming the chamfering 8 of the panel 1 in the 2nd execution mode shown in Figure 2, the 3rd execution mode shown in Figure 3 and the 4th execution mode shown in Figure 4, on the forming surface 22a of mould circle 22, formation and the facial 22b (with the moulding face of the corresponding shape of each unfocused surface 5x) of the moulding of their each corresponding shape.
[embodiment]
As embodiments of the invention 1～18, be the panel 1 that the chamfered section 8 that will be between involution end face 5 and the skirt section lateral surface 9 forms only forms, simultaneously involution end face 5 ground with the circular-arc convex curvature face of radius 5.5mm, it is that the tilt angle theta 2 of the connecting portion 8b of tilt angle theta 1 by the connecting portion 8a of the relative involution end face 5 that the makes chamfered section 8 relative skirt section lateral surface 9 that changes, make chamfering 8 in less than 30 ° scope is carried out various variations and made.In addition, as a comparative example 1～12, be to have chamfered section 8 identical and involution end face 5 and above-mentioned tilt angle theta 1 to surpass 30 ° panel with each above-mentioned embodiment, make by making above-mentioned tilt angle theta 2 be changed to various angles.Moreover, all above panels, the radius of curvature that all is the outer surface on the diagonal axis is 34 inches the flat panel of 50000mm.And, in the temperature-rise period in the involution operation of these panels and funnel,, run through respectively and implement 100 times whether producing the inspection of the defective that triangle breaks etc. on the panel.Represent its result with following table 1～table 4.
Table 1
| | Embodiment 2 | Embodiment 3 | Embodiment 4 | | Embodiment 6 | Embodiment 7 | | | |
| Radius | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| | 10 | 10 | 10 | 20 | 20 | 20 | 25 | 25 | 25 |
| θ2 | 50 | 60 | 70 | 50 | 60 | 70 | 50 | 60 | 70 |
| Defective | 1/100 | 1/100 | 2/100 | 1/100 | 2/100 | 2/100 | 1/100 | 2/100 | 2/100 |
Table 2
| | | | | | | | Embodiment 17 | Embodiment 18 | |
| Radius | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| | 10 | 20 | 25 | 10 | 20 | 25 | 10 | 20 | 25 |
| θ2 | 50 | 55 | 60 | 40 | 40 | 40 | 45 | 45 | 45 |
| Defective | 1/100 | 1/100 | 2/100 | 0/100 | 0/100 | 0/100 | 0/100 | 0/100 | 0/100 |
Table 3
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| Radius | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| θ1 | 30 | 30 | 30 | 30 | 30 | 30 |
| | 10 | 20 | 30 | 40 | 50 | 60 |
| Defective | 12/100 | 14/100 | 15/100 | 18/100 | 18/100 | 21/100 |
Table 4
| Comparative example 7 | Comparative example 8 | Comparative example 9 | Comparative example 10 | Comparative example 11 | Comparative example 12 | |
| Radius | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| θ1 | 35 | 35 | 35 | 35 | 35 | 35 |
| | 10 | 20 | 30 | 40 | 50 | 60 |
| Defective | 16/100 | 18/100 | 18/100 | 18/100 | 22/100 | 25/100 |
According to above-mentioned table 1～table 4 as can be known, because the panel among the embodiment 1～18, the tilt angle theta 1 of the relative involution end face of chamfered section is all less than 30 °, therefore among the incidence of defective is controlled in 100 in 2, wherein, particularly the tilt angle theta 2 of the relative skirt section lateral surface of chamfered section is less than 50 ° panel, and the incidence of defective is 0; Relative therewith, the panel in the comparative example 1～12, the incidence of defective is all in 100 more than 12.Thereby can assert, if above-mentioned tilt angle theta 1 then helps controlling the generation of substandard products less than 30 °.
Have again, embodiments of the invention 19～27, be to have the chamfered section 8 identical and 34 inches flat panel of the involution end face 5 that ground equally with each embodiment that has illustrated, it is that tilt angle theta 1 by the connecting portion 8a of the relative involution end face 5 that makes chamfered section 8 is in 2 °～3 ° the scope, makes the tilt angle theta 2 of connecting portion 8b in the relative skirt section 9 of chamfered section 8 carry out various variations and makes.In addition, as a comparative example 13～18, be to make above-mentioned tilt angle theta 1 for less than 2 ° panel, change tilt angle theta 2 and make.Then, in the inspection operation of these panels, implement the inspection of involution end face, judge whether its flatness separately is good.Its check result is represented with following table 5 and table 6.Wherein, in table 5 and table 6, zero mark represents that check result is good, and the ◎ mark is represented the best, and * mark is represented bad.
Table 5
| Embodiment 19 | | | | | | Embodiment 25 | Embodiment 26 | Embodiment 27 | |
| Radius | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| θ1 | 2.0 | 2.5 | 3.0 | 2.0 | 2.5 | 3.0 | 2.0 | 2.5 | 3.0 |
| θ2 | 40 | 40 | 40 | 45 | 45 | 45 | 50 | 50 | 50 |
| Defective | ◎ | ◎ | ◎ | ◎ | ◎ | ◎ | ○ | ○ | ○ |
Table 6
| Comparative example 13 | Comparative example 14 | Comparative example 15 | Comparative example 16 | Comparative example 17 | Comparative example 18 | |
| Radius | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| θ1 | 1.5 | 1.5 | 1.5 | 1.0 | 1.0 | 1.0 |
| | 10 | 20 | 30 | 10 | 20 | 30 |
| Defective | × | × | × | × | × | × |
According in above-mentioned table 5 and the table 6 as can be known, because the panel among the embodiment 19～27 is, the tilt angle theta 1 of the relative involution end face of chamfered section is more than 2 °, therefore the flatness of involution end face is good, wherein, particularly the tilt angle theta 2 of the relative skirt section lateral surface of chamfered section is judged as flatness the best of involution end face less than 50 ° panel; Relative therewith, the panel in the comparative example 13～18 though tilt angle theta 2 is littler than the panel among the embodiment 19～27, is judged as bad.Thereby can assert,, then help controlling the generation of substandard products if above-mentioned tilt angle theta 1 is more than 2 °.
And, according to the experimental result shown in above table 1～table 6, can learn: if the tilt angle theta of the corresponding involution end face of chamfered section 1 satisfies more than 2 ° and less than 30 ° condition, then can obtain good panel, in addition, if the condition that the tilt angle theta of the corresponding skirt section lateral surface of chamfered section 2 satisfies less than 50 ° then can obtain better panel.Have again, though in the foregoing description, the panel that only forms between involution end face 5 and the skirt section lateral surface 9 chamfered section 8 that forms with circular-arc convex curvature face is illustrated, but for the panel that forms for the panel that these chamfered section 8 usefulness convex curvature faces and planar combination are formed or with plural planar combination, also show tendency same as the previously described embodiments.
Claims (6)
1. glass article for cathode ray tube, constitute by glass screen with following characteristics or glass awl, in described glass screen or glass awl, have with diagonal axis and possess the involution end face as boundary member and on the openend in the skirt section of interconnective each limit shape side wall portion, form chamfered section between skirt section lateral surface in the zone that comprises diagonal axis at least and the involution end face, it is characterized in that:
Described chamfered section, is constituting by flexure plane or plural plane or flexure plane and plane with the involution end face with shape on the shortest direction that is connected of skirt section lateral surface, and in the longitudinal cross-section, its chamfered section bloats with described involution end face is compared more laterally with the dummy line that the described skirt section lateral surface and the intersection point of chamfered section couple together with the intersection point of chamfered section, and described chamfered section is that unfocused surface, described involution end face are abradant surface.
2. glass article for cathode ray tube, constitute by glass screen with following characteristics or glass awl, in described glass screen or glass awl, have with diagonal axis and have the involution end face as boundary member and on the openend in the skirt section of interconnective each limit shape side wall portion, form chamfered section between skirt section lateral surface in the zone that comprises diagonal axis at least and the involution end face, it is characterized in that:
Described chamfered section, with involution end face and shape on the shortest direction that is connected of skirt section lateral surface be by, constituting of flexure plane or plural plane or flexure plane and plane, and in the longitudinal cross-section, its chamfered section bloats with described involution end face is compared more laterally with the dummy line that the described skirt section lateral surface and the intersection point of chamfered section couple together with the intersection point of chamfered section, and the angle of inclination of the connecting portion of the relative involution end face of described chamfered section is more than 2 ° and less than 30 °.
3. glass article for cathode ray tube according to claim 2 is characterized in that:
The angle of inclination of the connecting portion of the relative skirt section lateral surface of described chamfered section is less than 50 °.
4. according to each described glass article for cathode ray tube in the claim 1～3, it is characterized in that:
The radius of curvature of the outer surface on the diagonal axis of the face portion of the front in the described skirt section of covering on this glass shields is more than the 10000mm.
5. glass article for cathode ray tube according to claim 1 is characterized in that:
Maximum overall dimension on the diagonal axis is more than the 500mm.
6. the manufacture method of a glass article for cathode ray tube, this glass article for cathode ray tube is made of glass screen with following characteristics or glass awl, in described glass screen or glass awl, have with the diagonal axis and be boundary member and on the openend in the skirt section of interconnective each limit shape side wall portion, have the involution end face, form chamfered section between skirt section lateral surface in the zone that comprises diagonal axis at least and the involution end face, it is characterized in that, comprising:
Molding procedure, use as the counterdie circle, the shape that is the moulding face of the described chamfered section of moulding in the forming surface is, on the shortest direction that is connected in position with the position of corresponding involution end face and corresponding skirt section lateral surface, be flexure plane or plural plane or flexure plane and planar combination, and in the longitudinal cross-section, its chamfered section and with the intersection point at position with the position of corresponding chamfered section of the described involution end face of correspondence, compare more with the dummy line that the intersection point at the position of corresponding chamfered section couples together with the position of the described skirt section of correspondence lateral surface and to bloat, come moulding glass screen or glass awl with such mould circle to foreign side; Simultaneously,
Grinding step after implementing this molding procedure, grinds the described involution end face that glass shields or glass is bored.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004268781A JP2006085994A (en) | 2004-09-15 | 2004-09-15 | Glass article for cathode-ray tube, and its manufacturing method |
| JP2004268781 | 2004-09-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1750223A true CN1750223A (en) | 2006-03-22 |
Family
ID=36164310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510103928 Pending CN1750223A (en) | 2004-09-15 | 2005-09-15 | Glass article for cathode ray tube and its producing method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006085994A (en) |
| CN (1) | CN1750223A (en) |
-
2004
- 2004-09-15 JP JP2004268781A patent/JP2006085994A/en not_active Withdrawn
-
2005
- 2005-09-15 CN CN 200510103928 patent/CN1750223A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006085994A (en) | 2006-03-30 |
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