CN1577713A - Glass neck tube for cathode-ray tube - Google Patents
Glass neck tube for cathode-ray tube Download PDFInfo
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- CN1577713A CN1577713A CN 200410062671 CN200410062671A CN1577713A CN 1577713 A CN1577713 A CN 1577713A CN 200410062671 CN200410062671 CN 200410062671 CN 200410062671 A CN200410062671 A CN 200410062671A CN 1577713 A CN1577713 A CN 1577713A
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Abstract
To realize improvement or the like of productivity in a manufacturing process of a neck pipe by making a tensile stress layer existing in the neck pipe appropriate, and enable to effectively suppress such a state that breakage occurs in welding with a funnel of the neck pipe after suppressing properly such a state that breakage occurs in long-distance transportation of the neck pipe or the like. The tensile stress layer is formed in annular regions 7, 8 on the way of an axis direction of the neck pipe 1, and the maximum tensile stress value in this tensile stress layer is made to be 7 MPa or less and 2.5 MPa or more. Then, this tensile stress layer is formed in a scattered state in the circumferential direction. The tensile stress layers are formed respectively in the annular region 7 of one aperture end part 4 side, and the annular region 8 of the other aperture end part 6 side, and stress values of the tensile stress layers formed in these two annular regions 7, 8 are made to be the same between the both.
Description
Technical field
The present invention relates to a kind of glass neck tube for cathode-ray tube, particularly relates to a kind of glass neck tube for cathode-ray tube of correlation technique of appropriateization of tension stress layer that makes the surfaces externally and internally that is present in this neck tube.
Background technology
As everyone knows, the cathode ray tube major part is a glass component, it possess the glass screen for cathode-ray tube (hereinafter to be referred as the glass screen) that is simple and easy rectangle image display part, with the welding and glass cone for cathode-ray tube (hereinafter to be referred as the glass awl) that electron beam passes through is arranged and in inside mutually of this panel glass with this cone glass phase welding and at the cathode-ray glass neck (hereinafter to be referred as neck tube) of inside installing electron gun.Above-mentioned glass awl is provided with bigger open end at axial (tube axial direction) end, and the other end is provided with less open end.Simultaneously, the axial two ends of above-mentioned neck tube are respectively equipped with the open end than minor diameter.And the less open end of a side opening end of this neck tube and above-mentioned glass awl is to constitute by welding.
Above-described neck tube has two kinds, a kind of is that diameter at the set open end of an axial end is equal to straight sections, and the axial other end of this straight sections neck tube (hereinafter to be referred as horn mouth formula neck tube) that to be horn mouth (flare) portion that is bell mouth shape constitute, another kind is by being equal to the neck tube (hereinafter to be referred as microcephaly's formula neck tube) of straight sections at the axial diameter of the set open end in two ends.
The manufacturing process of above-mentioned horn mouth formula neck tube is at first will be long dimension glass tubes of material cylindraceous and continue heating with spray nozzle type flame, then at umbrella loudspeaker oral area that diameter enlarges gradually of heated open end formation.Secondly for neck tube and tubes of material are cut, use spray nozzle type flame to continue heating, allow low temperature cutter Contact Heating position form so-called thermal shock, so promptly finished cutting process the neck tube of certain-length to the assigned address of tubes of material.But this moment, the otch at tubes of material two ends was sharp state, and this state brings obstacle can for the subsequent treatment operation.Therefore also softening with the spray nozzle type flame heat to two open ends of tubes of material, the surface tension that at this moment utilization is produced is carried out the flame chamfering to the two ends otch and is made it keep slick and sly, promptly carries out so-called round mouth and handles (glazing).
See also shown in Figure 1ly,, can obtain having the horn mouth formula neck tube 1 of loudspeaker oral area 3 at Z-direction one end of the identical straight sections 2 of diameter by above every processing.But, intactly place and make its natural cooling if above-mentioned two open ends 4,6 (being two ends 4,5 and the loudspeaker oral area 3 of straight sections 2 in detail) are implemented neck tube 1 after heat fused is handled, indicate so in the drawings on the annular section 7,8 of parallel oblique line and will occur the higher tension stress layer of stress value singularly.In detail, on the annular section 7,8 of the specified size of keeping apart respectively at the axial two ends 4,5 with the straight sections 2 of this neck tube 1, for example above tension stress layer of 8Mpa can appear.
In addition, the production process of above-mentioned microcephaly's formula neck tube is to remove from the manufacturing process of above-mentioned horn mouth formula neck tube on the processing basis that forms the loudspeaker oral area, carry out successively producing the cutting process that so-called thermal shock is implemented, then the two ends otch is implemented so-called round mouth and handle by assigned address in tubes of material.
By above-mentioned such processing, just can obtain microcephaly's neck tube that all identical straight tube of each position diameter constitutes, if also allow this straight neck tube handle the back natural cooling in heat fused, the same with above-mentioned situation, on the annular section of the specified size of keeping apart respectively at the axial two ends with this microcephaly's neck tube, for example above tension stress layer of 8Mpa also can appear.
In the following description, used the symbol of horn mouth neck tube shown in Figure 1 for simplicity, also identical about the description of microcephaly's neck tube.Promptly, when the above-mentioned neck tube 1 that has formed tension stress layer is handled, when particularly this neck tube 1 itself being packed and outwards transporting as product, the surfaces externally and internally that forms the annular section 7,8 of tension stress layer can produce slight wound or crackle etc. because of factors such as frictions.And this tiny wound can stretch by the effect of above-mentioned tensile stress, causes disadvantageous situation generations such as neck tube breakage thereupon.This disadvantageous situation is particularly showing when transporting more neck tube being grown distance, because exist this moment annular section 7,8 surfaces externally and internallies of tensile stress 1 more with the chance of packaging material or the friction of other parts.
Another kind of situation is, sometimes not above-mentioned neck tube itself as product treatment, but an above-mentioned neck tube 1 of making in glass component manufacturing works is obtained the cathode-ray tube glass component or and then this glass component and the welding of glass screen formed the cathode-ray tube glass-vacuum tube and it handled as product after ground such as this factory are with the welding of glass awl.During this situation, if there is the higher compressive stress layers of stress value in the open end 4 with glass awl welding side of neck tube 1, this compressive stress layers can play the strengthening layer effect so, even the open end 4 at this neck tube when neck tube 1 and the welding of glass awl rubs, also be difficult to take place rough sledding such as neck tube 1 scratch or breakage.Consider this point,, preferably allow the stress value of compressive stress layers of its open end 4 higher for well if not neck tube 1 itself during as product treatment.But if when raising the stress value of this compressive stress layers, the stress value of tension stress layer also must increase thereupon.Therefore, even want that having formed the stress value compressive stress layers be that the neck tube 1 of strengthening layer itself is as product treatment and when growing distance and transporting etc., also can cause the incidence of above-mentioned the sort of breakage to increase owing to the higher tension stress layer of stress value, it be more unfavorable therefore to handle like this.This situation, above-mentioned tension stress layer can appear at neck tube 1 usefulness nozzle flame area heated and not have boundary vicinity between the heated zone.In addition, compressive stress layers and tension stress layer are relevant with the glass awl, and related content can disclose in following patent document 1.
Consider above item, about the compressive stress layers of neck tube 1 formation and the stress value of tension stress layer, along with to differences such as the treatment states of this neck tube 1 and exist opposite requirement, but because the breakage that the packing of neck tube 1 and long distance are transported generation is an important problem very, therefore typically use tunnel (tunnel) type annealing furnace in the past, neck tube 1 is carried out annealing in process, and to make the tensile stress of its existence be 0 or near 0 (or de-stress is handled: following identical).Adopting this method is for considering when neck tube 1 itself during as product treatment, is necessary its tensile stress is treated to 0 or near 0.In addition, about an open wherein example in following patent document 2 of being configured in of annealing furnace and the patent document 3.
[patent document 1] patent disclosure is put down into the 7-14530 communique
Clear and the 39-1028 communique of [patent document 2] patent disclosure
Clear and the 52-134618 communique of [patent document 3] patent disclosure
But, as described above, be 0 for the tension stress layer that neck tube is existed in the past or needed the implemented for long periods annealing in process near 0, therefore can cause operating efficiency to worsen or problems such as production efficiency reduction.Moreover, owing to need large-scale tunnel type annealing furnace, also can cause the maximization of production equipment and the problem that cost of equipment rises suddenly and sharply simultaneously.
More seriously, carry out the above-mentioned tensile stress that neck tube was existed and be 0 or during near 0 annealing in process, can make the existing compression stress of open end (being the end of the straight sections of horn mouth formula neck tube in detail) of neck tube also become 0 or near 0 by this annealing in process, this open end of neck tube can be because undercapacity former thereby cause damaged incidence to increase during like this with the welding of glass awl.Therefore, during with the welding of glass awl, how to do the peristome that just can make neck tube and keeping enough intensity, and can avoid the breakage that this neck tube takes place because of tensile stress when long distance is transported just to become a new problem.
This shows that above-mentioned existing glass neck tube for cathode-ray tube obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that glass neck tube for cathode-ray tube exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing glass neck tube for cathode-ray tube exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied and innovated, in the hope of founding a kind of glass neck tube for cathode-ray tube of new structure, can improve general existing glass neck tube for cathode-ray tube, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that above-mentioned existing glass neck tube for cathode-ray tube exists, considered to find out after the above-mentioned situation, and provide a kind of glass neck tube for cathode-ray tube of new structure, technical problem to be solved is appropriately to change by the tension stress layer that neck tube is existed, in the production efficiency of trying hard to improve in this neck tube manufacture process, control the breakage that this neck tube takes place effectively under long distance such as transports at situation, the breakage that takes place in the time of can also suppressing the welding of this neck tube and glass awl effectively, thus be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of glass neck tube for cathode-ray tube according to the present invention's proposition, have open end at axial two ends, and the little open end welding mutually of the open end of a side and glass cone for cathode-ray tube, above-mentioned openings at two ends end each other, and when in axial midway annular section, forming tension stress layer, make maximum tensile stress value on this tension stress layer remain on 7Mpa, more than the 2.5Mpa.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid glass neck tube for cathode-ray tube, wherein said tension stress layer are to be dispersity to circumferencial direction to form.
Aforesaid glass neck tube for cathode-ray tube, wherein said tension stress layer are to be respectively formed in the open end side ring shape zone of an above-mentioned end and in the open end side ring shape zone of the other end.
Aforesaid glass neck tube for cathode-ray tube, the wherein said stress value of the tension stress layer in above-mentioned two annular sections that is formed on is for equivalent.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows: for solving the feature of the present invention that above-mentioned technical problem finds out be, have open end at axial two ends, and the less open end of the open end of a side and glass cone for cathode-ray tube is mutually in the cathode-ray tube neck tube of welding, at the open end of above-mentioned both sides each other when axially midway annular section forms tension stress layer, maximum tensile stress value on this tension stress layer is controlled at below the 7Mpa, more than the 2.5Mpa.The above-mentioned tension stress layer normally surfaces externally and internally of the above-mentioned annular section in neck tube forms.In addition, the maximum tensile stress value is the numerical value of measuring by Sai Nameng (Senarmont) method.Have, the open end of horn mouth formula neck tube both sides is each other axially midway and be the tension stress layer that forms in axially midway the annular section of straight sections again.
By such structure, the stress value of the tension stress layer of neck tube formation can not be looked like in the manufacturing process of this neck tube, the stress value when carrying out natural cooling after its open end nozzle is heated excessively is elevated to more than the 8Mpa.And also can be when replacing natural cooling in the tunnel type annealing furnace, not carry out annealing in process, stress value is crossed low to 0 or be close to 0.So just formed the maximum tensile stress value in the tension stress layer below the 7MPa and more than 2.5Mpa, when keeping the tensile stress values of this degree,, caused damaged probability also very low even neck tube in long distance is transported friction etc. takes place.And, when so some tension stress layer left behind,, can advantageously suppress the breakage of neck tube during therefore with the welding of glass awl owing to form compressive stress layers at the open end (being the end of the straight sections of horn mouth formula neck tube in detail) of neck tube.That is to say,, just can not fully suppress long apart from the breakage of neck tube under the situation such as transporting if the maximum tensile stress value of tension stress layer surpasses 7Mpa.On the other hand, when tensile stress values is lower than 2.5Mpa, the breakage of neck tube in the time of just can not fully suppressing with the welding of glass awl.Therefore, the neck tube that can both take into account of this strong point aspect two of our just can obtain under situation such as suppress that long distance is transported, taking place damaged and the breakage that produces during with the welding of glass awl.Consequently with neck tube itself during as product treatment, be about to the neck tube packing back that glass component manufacturing works make and deliver to other factory by long-distance transportation, with this neck tube during, suitable especially in other factory with the welding of glass awl.In addition, no longer need as in the past for to make tensile stress values be 0 or handle near 0 long term annealing that is carried out, like this when having improved production efficiency, also just no longer need the such large-scale equipment of tunnel type annealing in process stove, thereby can realize the miniaturization of equipment and the purpose of reduction cost of equipment.
In said structure, above-mentioned tension stress layer preferably forms dispersity at circumferencial direction.
Handle like this, because tension stress layer is not to be collected state to be formed in the above-mentioned annular section, but formation dispersity, therefore small the damaging and the incidence of crackle of causing because of the inner and outer surface layers friction of this annular section etc. can reduced, also have the expansion of the scar of inhibition, reduce the advantage that causes probability of damage thus.
In addition, in said structure, above-mentioned tension stress layer preferably forms respectively at the annular section of the open end of the annular section of the open end of an above-mentioned side and opposite side.Exactly, for horn mouth formula neck tube, above-mentioned tension stress layer preferably is respectively formed in the annular section of the annular section of straight sections one side end and end side.
Handle like this, damaged in the time of can not only suppressing above-mentioned long distance and transport and the breakage during with the welding of glass awl, the welding side of neck tube and the open end of opposition side can also be strengthened by compressive stress layers.Therefore, even friction etc., the also breakage that can suppress so cause take place in the open end of the welding side of neck tube and opposition side.In addition, for horn mouth formula neck tube, the loudspeaker oral area is placed on down and carries out conveyance on the conveyer belt sometimes.In this case, even the end of loudspeaker oral area one side of straight sections is subjected to load shock or vibration from conveyer belt, owing to strengthened by compression layer in this end, the situations such as small wound and crackle or breakage that therefore can effectively suppress take place so.In addition, because the open end of loudspeaker oral area is also strengthened by compressive stress layers, therefore also can effectively suppress generations such as above-mentioned breakage.
Further, in said structure, preferably keep the stress value of the above-mentioned tension stress layer that forms at two annular sections identical.
Handle like this, owing to form above-mentioned two equal tensile stress values, open end in the neck tube both sides forms equal compressive stress layers respectively and obtains equal reinforcement, therefore the stress of neck tube core integral body is biased unusually with regard to not taking place, and can more effectively suppress small wound and generations such as crackle or breakage simultaneously.
Via as can be known above-mentioned, glass neck tube for cathode-ray tube of the present invention, appropriately change by making the tension stress layer that exists on the neck tube, improve the whiles such as production efficiency in this neck tube manufacture process, the generation of the damaged situation in the time of can also suppressing the welding of this neck tube and glass awl effectively takes place outside the damaged situation appropriate when suppressing this neck tube in long-distance transportation etc.When axially midway the annular section 7,8 of neck tube 1 forms tension stress layer, the maximum tensile stress value of this tension stress layer is controlled at more than the following 2.5MPa of 7MPa.In addition, form tension stress layer respectively at the annular section 8 of the open end 6 of the annular section 7 of the open end 4 of a side and opposite side, these two tension stress layer stress value between the two that annular section 7,8 forms is identical.
By technique scheme, the present invention has following advantage and effect at least:
According to above the present invention who introduces as can be known, glass neck tube for cathode-ray tube of the present invention, maximum tensile stress value by the tension stress layer that will form on the neck tube is controlled at more than the following 2.5MPa of 7MPa, the neck tube of taking into account two aspect advantages of the damaged and breakage that takes place during with the welding of glass awl that the long distance that just can be inhibited takes place when transporting.Therefore, neck tube itself is suitable especially during as product treatment.In addition, can also realize miniaturization, the reduction equipment of equipment and purpose such as enhance productivity.
In addition, because tension stress layer is formed on circumferencial direction with dispersity, in small wound and cracking frequency that the surfaces externally and internally friction that has reduced because of the annular section that forms tension stress layer causes, can also suppress the expansion of wound like this, reduce and cause damaged probability.
Have again, since tension stress layer be respectively formed at the annular section of open end of a side and opposite side open end annular section (in detail, for horn mouth formula neck tube is at the annular section of a side end of straight sections and the annular section of end side), therefore strengthened by compressive stress layers respectively in this end of neck tube both sides, and improve the intensity of this neck tube effectively.
And because the stress value of the tension stress layer that above-mentioned two annular sections form is identical, so the stress of neck tube core integral body is biased unusually with regard to not taking place, and so more can suppress generations such as small wound, crackle or breakage effectively.
In sum, the glass neck tube for cathode-ray tube of special construction of the present invention, appropriately change by the tension stress layer that neck tube is existed, trying hard to improve in this neck tube manufacture process in the production efficiency, can control the breakage that this neck tube takes place effectively under long distance such as transports at situation, the breakage that takes place in the time of can also suppressing the welding of this neck tube and glass awl effectively.It has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing glass neck tube for cathode-ray tube has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by going out preferred embodiment, conjunction with figs. is described in detail as follows.
Description of drawings
Fig. 1 is the expression neck tube side cross-sectional view relevant with example of the present invention.
Fig. 2 is the test sketch of the neck tube manufacturing process of simple expression and the invention process morphologic correlation.
Fig. 3 is the intensity experiment state is carried out in expression to the neck tube with the invention process morphologic correlation a test sketch.
1: neck tube 2: straight sections
3: loudspeaker oral area 4: open end (the welding side end of straight sections)
5: end (the horn mouth side end of straight sections) 6: open end (open end of loudspeaker oral area)
7: annular section 8: annular section
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of glass neck tube for cathode-ray tube, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.In addition, for convenience's sake, use used Fig. 1 in the following description.
Relevant with this example as shown in Figure 1 neck tube 1, be one by along Z-direction in the identical straight sections 2 of distance to a declared goal interior diameter with constitute the horn mouth formula neck tube of an integral body along with the umbrella loudspeaker oral area 3 that enlarges gradually away from these straight sections 2 its diameters.Open end side formation in straight sections 2 is provided with a little open end of boring with the glass minor diameter open end 4 of welding (hereinafter referred to as welding side end 4) mutually.In addition, at the end side 5 (hereinafter referred to as horn mouth side end 5) of this straight sections 2 above-mentioned loudspeaker oral area 3 of ining succession.And then, at open end 6 that diameter is relatively large of open end side formation of loudspeaker oral area 3.
On the straight sections 2 of this neck tube 1, be separated by the annular section 7 (indicating the zone of parallel oblique line) of position of specified size when go up forming tension stress layer with welding side end 4, being separated by with horn mouth side end 5 also forms tension stress layer on the annular section 8 (indicating the zone of parallel oblique line) of position of specified size.The maximum tensile stress value of these two tension stress layer is all at (preferably below the 5MPa) below the 7MPa more than the 2.5MPa, and has identical stress value between the two.In addition, 3.5MPa is following if above-mentioned maximum tensile stress value can be controlled at, 2.5MPa is above just better.
These two tension stress layer are respectively formed on two annular sections 7,8 and to circumference disperses.And along with the formation of these two tension stress layer, the welding side end 4 of straight sections 2 has all formed the identical compressive stress layers of stress value with horn mouth side end 5.Therefore, the both ends 4,5 of this straight sections 2 all obtain equal reinforcement by compressive stress layers.
The neck tube 1 that possesses above structure is to make by following method.At first with the same in the past, when earlier just the open end of glass material pipe continues to add thermosetting horn mouth portion with nozzle flame with the open end of former neck tube, the former neck tube other end of glass material pipe is being continued heating with nozzle flame, cut out the former neck tube of certain-length, to two open end nozzle flame thermoplastics of former neck tube, carry out so-called round mouth and handle then.
(surface temperature of neck tube is about 250 ℃) and then after this step, see also shown in Figure 2, by be provided with in the welding side end 4 of straight sections 2 and horn mouth side end 5 corresponding two positions 4 along diametric(al) as from the so-called infrared ray burner 9 of sandwich (metal being burnt red) with burner, from 4,5 outsides, two ends of straight sections 2 respectively to the tension stress layer and the circumference heating at the most close both ends 4,5 and carry out annealing in process.Neck tube 1 is in this case surrounded by 4 infrared ray burners 9, is rotated (rotation) around the Z axle shown in mark a.Like this, carry out the method for localized heating by two tension stress layer using 9 pairs of neck tubes 1 of infrared ray burner, because each tension stress layer is difficult to reach under the uniform state of temperature at circumferencial direction and heats, annealing in process can produce inhomogeneously at circumferencial direction like this, and its tension stress layer will be dispersed in circumferencial direction as described above thereupon.That is to say, adopt in the past like that by the method for annealing furnace the neck tube annealing in process, because the surfaces externally and internally Zone Full of neck tube is in the atmosphere of annealing furnace high-temperature, though annealing in process does not produce inhomogeneous at the circumferencial direction of neck tube like this, if relevant with the present invention make the method for neck tube 1 rotation but adopt, just can make the dispersion of tensile stress course circumferencial direction while carrying out localized heating.In addition, in said structure,, or its rotary speed is changed by the cycle of appointment, just can reach the effect that tension stress layer is disperseed to circumferencial direction really if make the rotation of neck tube 1 discontinuity.
And, when supposing that such annealing in process is carried out more than 30 seconds under 475 ℃, in other words be exactly, carry out the glass surface fusing that heat treated can not make neck tube 1, and when the glass wall thickness direction central portion of neck tube 1 is warming up to annealing in process more than the annealing point for the moment, form large-scale compressive stress layers to central portion along the Z axle from the both ends 4,5 of straight sections 2.Therefore, two tension stress layer of straight sections 2, respectively along axle Z direction both ends 4,5 close apart from it towards (preferably more than the 12mm), 20mm more than the central portion 10mm with interior position, and forming annular section 7,8 along the central portion of Z-direction, the axle Z direction width of this annular section 7,8 is at (preferably more than the 12mm and in the 20mm) more than the 10mm simultaneously.Like this, both ends 4,5 circumference of straight sections 2 can possess the advantage that the possibility of the harmful effect rate that the existence because of tension stress layer causes is suitably reduced.
In addition, the present invention of above-mentioned example both had been applicable to horn mouth formula neck tube, was applicable to microcephaly's neck tube too.
In the following comparative example 1,2 and embodiments of the invention 1～4, it is 29.2mm that any one neck tube all is made into external diameter (external diameter of straight sections), the horn mouth formula neck tube of wall thickness 2.5mm.And in comparative example 1,2 and the example of the present invention 1～4, the annealing in process in the neck tube manufacture method has nothing in common with each other.Comparative example 1 is not carry out annealing in process and the horn mouth formula neck tube of natural cooling.Comparative example 2 is that neck tube loudspeaker oral area is placed on downwards in the go-cart, the neck tube of each go-cart is deposited 35 minutes temperature being set in about 650 ℃ annealing furnace, makes tension stress layer be entirely 0.And embodiment 1～4th, under the state as shown in Figure 2 with infrared ray burner 9 by about after approximately at interval 60mm arranges and carries out annealing in process, natural cooling.Among the embodiment 1, the time of heating with burner is about 50 seconds, and this time of embodiment 2 is about 45 seconds, and this time of embodiment 3 is about 38 seconds, and this time of embodiment 4 is about 30 seconds.In addition, embodiment 1～4 is by neck tube rotation, and the speed of rotation changes by the cycle and obtains.And all be to be heated to maximum temperature by the infrared ray burner to be about under 475 ℃ the situation and to obtain.
Each neck tube that said method was handled is implemented the boiling shock-testing then.This boiling shock-testing is carried out as follows.That is, the first step is nuzzled up the outer surface of neck tube and inner surface with sand paper it is applied scratch (fraying), with rubber stopper etc. the welding side end of the straight sections of this neck tube is blocked.Second goes on foot as shown in Figure 3, when neck tube 1 is soaked in the hot water storgae 10 of assigned temperature, pours hot water into to the inside of neck tube 1, is keeping a period of time to make the temperature of neck tube 1 and hot water temperature reach same value.The 3rd step, through behind the certain hour, neck tube 1 is taken out from hot water storgae 10, still adorning in inside under the state of hot water and putting into the cold rinse bank immersion.The 4th step, when cold rinse bank soaks, the temperature difference T of hot water and cold water when (in 60 seconds) confirm the neck tube fragmentation.When neck tube does not have fragmentation in this case, promote the hot water temperature of above-mentioned second step in handling, till the neck tube fragmentation, carry out the processing in～the four step of second step repeatedly.Such testing needle is tested 5 neck tubes respectively to comparative example 1,2 and embodiment 1～4, calculates the mean value of above-mentioned temperature difference T then.Its result is as shown in table 1.In addition, the maximum tensile stress value below in the table 1 refers near the destruction starting point of each neck tube cuts off the maximum tensile stress value that the surface exists when then its section being observed with Sai Nameng (Senarmont) method.In addition, the meaning of judging symbol ◎ in the following table 1 is almost not have because of the existence of tension stress layer fragmentation to take place, though the meaning of symbol zero is such fragmentation has taken place but not to be because the problem that long distance is transported causes, symbol * the meaning be such fragmentation to take place easily be not durable.
[table]
| Sample | Embodiment 1 | | | Embodiment 4 | Comparative example 1 | Comparative example 2 |
| The #150 wearing and tearing | ??ΔT＝66.2℃ | ??ΔT＝66.7℃ | ??ΔT＝64.5℃ | ??ΔT＝60.4℃ | ??ΔT＝48.0℃ | ??ΔT＝66.7℃ |
| The #320 wearing and tearing | ??ΔT＝70.6℃ | ??ΔT＝70.1℃ | ??ΔT＝69.0℃ | ??ΔT＝65.5℃ | ??ΔT＝53.3℃?? | ??ΔT＝71.6℃ |
| Judge | ??????◎ | ??????◎ | ??????◎ | ??????○ | ??????× | ??????◎ |
| The maximum tensile stress value | ????2.5MPa | ??3.5MPa | ?????5MPa | ????7MPa | ??????8MPa | ?????0MPa |
Above-mentioned boiling shock-testing is to be used for measuring the ruined easy degree of glass, and temperature difference T is more little to be exactly the glass of easy more fragmentation, and can know the degree that there is tensile stress in it by above-mentioned such mistake more with the sand paper wiping.That is to say that when if tensile stress is present in neck tube surperficial, the damaged easier scar that causes from sand paper is that starting point takes place.In addition, not only want the wiping outer surface also to want the reason of wiping inner surface to be with sand paper, when the inside of neck tube is packed electron gun in the manufacture process of cathode ray tube, at fixing can the rub inner surface of neck tube of the spring members of used in electron gun of the assigned address of neck tube inside, so this inner surface also has the possibility that is scratched.
Usually, the standard of utilizing boiling shock-testing result to judge is, if with Δ T after the sand paper wiping of #150 more than 55 ℃, just can not bring obstacle with Δ T after the above sand paper wiping of #320 more than 60 ℃ to the manufacturing and the conveyance of cathode ray tube.Therefore, according to above-mentioned table 1, if the maximum tensile stress value of the straight sections surface of neck tube (inner surface and outer surface) is below 7MPa, preferably below the 5MPa, just be entirely that 0 situation is the same fragmentation can not to take place with tensile stress, even we can say the surface of neck tube small wound is arranged, can be because of the situation that the scar expansion causes the neck tube breakage take place yet.
Secondly, respectively above-mentioned comparative example 1,2 and embodiment 1～4 have been confirmed easy the to be injured degree of welding side end.The words that describe in detail, in the manufacturing process of cathode ray tube, nearly all breakage all is owing to the injured reason of the welding side end of neck tube straight sections causes, wiping when therefore the welding side end of neck tube straight sections being applied for example about 5Mpa of certain pressure (500gf/mm) with the sand paper of #320, and the mensuration degree of depth of marquis's wound at this moment.This measurement result is as shown in table 2 below.In addition, in the following table 2, compression stress value, promptly the compression stress value of the welding side end of straight sections is measured by Sai Namengfa.
[table two]
| Sample | Embodiment 1 | | | Embodiment 4 | Comparative example 1 | Comparative example 2 |
| The #320 wearing and tearing | ????15.0μm | ????10.0μm | ????8.0μm | ????6.26μm | ????6.25μm | ????31.25μm |
| Compression stress value | ????2.5MPa | ????3.5MPa | ????5MPa | ????7MPa | ????8MPa | ????0MPa |
| The breakage of neck tube reason | ????900ppm | ????600ppm | ????500ppm | ????500ppm | ????490ppm | ????2000ppm |
According to above-mentioned table 2, can confirm that the welding side end of the neck tube of comparative example 1 has a compressive stress layers that force value is higher, because the existence of this compressive stress layers, it is superficial to observe the abrasive scar of sand paper.In contrast, because the welding side end of neck tube does not form compressive stress layers, it is injured to observe the friction that is easy to because of sand paper in the comparative example 2.On the other hand, therefore the neck tube of embodiment 1～4 can be confirmed to be difficult to take place because of the injured situation that rubs owing to the compressive stress layers that has suitable stress value at the welding side end.At this moment, suppose in the manufacturing process of cathode ray tube,, bad unquestioned again allowed band takes place think 1000ppm even the wound that takes place with the welding side end is the breakage of starting point.Consider this point, what can hold is that in the manufacturing process of cathode ray tube, any one damaged ratio of reason generation because of neck tube all is equal to slightly with comparative example 1 among the embodiment 1～4.And compare damaged far from easily with the comparative example 2 that does not have compression stress.And according to above-mentioned table 2, if the welding side end of the neck tube surface wound depth during with the sand paper wiping of #320 in 15 μ m, it is no problem to we can say in the actual use.In addition, observe with sensitive color method, can confirm along the circumferential direction disperseing in the straight sections of neck tube really of tension stress layer by neck tube to embodiment 1～4.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (4)
1, a kind of glass neck tube for cathode-ray tube has open end at axial two ends, and the little open end welding mutually of the open end of a side and glass cone for cathode-ray tube, it is characterized in that:
Above-mentioned openings at two ends end each other, and when in axial midway annular section, forming tension stress layer, make maximum tensile stress value on this tension stress layer remain on 7Mpa, more than the 2.5Mpa.
2, glass neck tube for cathode-ray tube according to claim 1 is characterized in that wherein said tension stress layer is to be dispersity to circumferencial direction to form.
3, glass neck tube for cathode-ray tube according to claim 1 and 2 is characterized in that wherein said tension stress layer is to be respectively formed in the open end side ring shape zone of an above-mentioned end and in the open end side ring shape zone of the other end.
4, glass neck tube for cathode-ray tube according to claim 3 is characterized in that the wherein said stress value of the tension stress layer in above-mentioned two annular sections that is formed on is for equivalent.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003276250 | 2003-07-17 | ||
| JP2003276250 | 2003-07-17 | ||
| JP2004015748A JP2005050781A (en) | 2003-07-17 | 2004-01-23 | Glass neck pipe for cathode-ray tube |
| JP2004015748 | 2004-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1577713A true CN1577713A (en) | 2005-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410062671 Pending CN1577713A (en) | 2003-07-17 | 2004-07-08 | Glass neck tube for cathode-ray tube |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005050781A (en) |
| CN (1) | CN1577713A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100780902B1 (en) * | 2006-12-01 | 2007-11-30 | 주식회사 엘코스 | Airless pumping device and dispenser therewith |
-
2004
- 2004-01-23 JP JP2004015748A patent/JP2005050781A/en not_active Withdrawn
- 2004-07-08 CN CN 200410062671 patent/CN1577713A/en active Pending
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|---|---|
| JP2005050781A (en) | 2005-02-24 |
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