CN1255343C - Flat type glass funnel mould for cathode ray tube - Google Patents

Abstract

The present invention relates to a glass cone die for a flat CRT, which belongs to the field of the production of a glass bulb of the CRT. The present invention comprises a male die for making a glass cone, a bottom die and a die ring. The male die is two concave-convex rectangular edge rings, each concave-convex rectangular edge ring is composed of two arcs of which the sizes of radiuses are R1, R1' and R2, R2', the radians of the two arc are different, and the concave-convex directions are roughly opposite. Two radians of R1 and R2 and R'1 and R'2 are respectively smooth connection, the other two ends of the concave-convex part are respectively connected with a deflection part of the male die and a main body part. The bottom die is a concave-convex rectangular edge ring formed by two The glass cone manufactured by adopting the die has the characteristics of making the glass bulb of the CRT have lighe weight, small depth and high intensity, and the requirement for flatting of the glass bulb is satisfied.

Description

The flat-shaped cathode-ray tube glass cone mould

Technical field

The invention belongs to bulb for cathode-ray tube production line field, specially refer to the mould of the manufacturing flat-shaped cathode-ray tube glass awl that is used for flattening televisor and indicating meter.

Background technology

The glass awl that utilizes common traditional bulb for cathode-ray tube mould to be produced, as shown in Figure 1, it is through after the compacting, the microcephaly is cut away, the neck of sealing-in one specified dimension forms and resembles a funnelform glass awl of rectangular opening, uses the glass for bonding sealing-in between this glass awl and the glass screen.As shown in Figure 1, the glass awl is divided into deflector and main part.Corresponding deflector coil position claims deflector, and it links to each other with neck, is downwards main part along it, and main part bottom is a sidewall, locates and the sealing-in of glass screen for big mouthful, and except that neck, the glass awl then is to utilize corresponding mould produced.

The glass screen is bored after sealing-in with glass, in neck, insert the electron beam gun of having assembled, the sealing back is at sealed state of the inner formation of glass bulb linker, utilize deairing step, inside is formed vacuum state, the effect of external pressure makes the inner formation of glass bulb linker certain negative pressure strong, and its vacuum tightness is generally 10 ^-5About Torr, simultaneously, brought certain stress (to call vacuum stress in the following text) to glass bulb.Glass bulb also need bear the technological temperature more than 400 ℃ in the manufacturing process of picture tube, and the effect of multiple factor can cause the quick-fried of glass bulb to contract, and this is a great hidden danger for the producer that produces in batches.If the glass bulb compressive strength is powerful inadequately, will under the effect of vacuum stress, cause fatigure failure; In addition, because glass bulb itself exists the compressive strength that certainly will reduce glass bulb as glass defects such as bubble, crackles, under the effect of vacuum stress, also can cause fatigure failure.So just require to reduce as possible the glass bulb defective, can resist the intensity that vacuum stress is damaged in the hope of possessing.For enhancing one's market competitiveness, CRT manufacturer makes great efforts to carry out various technical renovation, and one of them obviously promotes is exactly the complanation of product, has made the convex glass screen of traditional glass bulb into flush type glass screen.But the planar glass screen structure makes the stress distribution of glass bulb linker under vacuum state that obvious variation take place, particularly strengthened the stress of glass screen corner part and glass screen, glass awl sealed portion, this is disadvantageous, for this reason, must take appropriate measures in envelope designs and solve.Usually the measure of taking is: strengthen glass bulb thickness, particularly strengthen the thickness of the big sidewall sections of glass bulb stress, strengthen the intensity of glass screen, glass cone glass.But, thickeied glass bulb thickness, mean and gain in weight.When the maximization direction developed, the weight of glass bulb strengthened overweightization caused televisor etc. at display devices such as televisors, and this has just brought many-sided inconvenience such as production, transportation, use.In the recent period, in complanation, maximization, the loss of weight of glass bulb becomes the technical problem that mainly solves.Because the picture tube televisor is subjected to the challenge of flat-panel monitor such as LCD TV, plasm TV etc. in recent years, the flattening exploitation innovation of televisor enters the new stage once more, require requirement in light weight, shaped flat for satisfying the human consumer, develop a kind of can vacuum-resistant stress, can make the cathode tube of indicating meter, televisor flattening more and more obtain people's attention again.Obtain this effect, the flattening technology of glass bulb is crucial.And produce this glass bulb, key depends primarily on mould.In the glass bulb that comprises screen and awl, because the thickness of glass screen itself is limited, and has realized complanation, thereby the breach has been placed on the awl.In the flattening technology of glass awl, the proposition that has the increasing deflection angle, reduce the methods such as size of glass awl from opening part to the neck mouth, but, all can not obtain perfect performance improves, my company is engaged in the rich experiences of all kinds of bulb for cathode-ray tube mould developments and production long-pending more than ten years, through experimental study repeatedly, fully see and strengthen the compressive strength problem that glass awl deflector angle can reduce glass bulb on the contrary too much, increase along with deflection angle, near the screen awl sealing-in limit maximum tensile stress also becomes big gradually, and the maximum tensile stress in glass awl and sealing-in district will increase exponentially.See that in test deflection angle is 135 ° a glass bulb, the maximum tensile stress of glass awl can reach more than the 60Mpa.

Because the flattening of glass awl need add large deflection angle, has also increased tensile stress, substantially exceeded the actual compressive strength of glass awl.For this reason, find out a kind of glass awl weight (being thickness) that neither increases the weight of by experiment, can bear the glass wimble structure of destructive intensity again, wherein mould is the maximum key element that addresses this problem.

Summary of the invention

The technical issues that need to address of the present invention are at the best design of seeking the bulb for cathode-ray tube flattening.In the existing glass cone mould technology, most ways that strengthen glass awl deflector angle that adopt have produced the unfavorable factor that tensile stress increases.The present invention is a kind of glass cone mould structure that redesigns in order to overcome above-mentioned contradiction, and purpose provides and is used to make the mould that a kind of longitudinal degree flat-shaped cathode-ray tube glass little, in light weight, that have abundant vacuum-resistant intensity is bored.

In order to achieve the above object, be realize by the following technical solutions (before narration scheme content, we define several symbols earlier: because the big mouthful of place's rectangular edges in glass awl bottom has long limit, the branch of minor face, just corresponding television screen has different wide and height, corresponding to long limit and the concavo-convex separately radian of minor face is incomplete same, the long limit of definition is a directions X, the definition minor face is the Y direction, outside surface at the glass awl, shown in Fig. 2 a, in X-direction, first concave arc degree of boring the downward process of neck along glass claims R3, rise and claim R4 through second cambered outwards radian, the label symbol in the symbol of glass awl outside surface and this mould on the bed die is consistent; In Y direction, we add respectively ' distinguish, its corresponding each symbol, promptly first concave arc degree along the downward process of glass awl neck claims R ' 3, first concave arc degree claims R ' 4, is illustrated in Fig. 2 b.Equally, these symbols are also consistent with the respective symbol of bed die in this mould; Internal surface at the glass awl, first concave arc degree of boring the downward process of neck along glass in X-direction claims R1, rise again and claim R2 through second protruding radian, in Y direction, add equally ' distinguish, promptly first concave arc degree along the downward process of glass awl neck claims R ' 1, rise again and claim R ' 2 through second protruding radian, be illustrated in Fig. 2 b, and be recorded in the following scheme, the outside surface of glass awl is corresponding with the bed die among the present invention respectively among the figure, the internal surface of glass awl is corresponding with punch respectively among the figure), technical scheme of the present invention is that a kind of flat-shaped cathode-ray tube glass cone mould comprises the punch of making the glass awl, bed die and mould circle, it is characterized in that, described punch is by 2 radian differences, the radius that concave and convex direction is roughly opposite is R1, R ' 1 and R2, R ' 2 constitutes concavo-convex rectangle rib ring, two radian R1, R2 and R ' 1, be smooth connection respectively between the R ' 2, two ends in addition of jog link to each other with main part with the deflector of punch respectively; Described bed die is to be that R3, R ' 3 and R4, R ' 4 constitute concavo-convex rectangle rib ring by 2 radian differences, radius that concave and convex direction is roughly opposite, be smooth connection respectively between two radian R3, R4 and R ' 3, the R ' 4, two ends in addition of jog link to each other with main part with the deflector of bed die respectively.2 radius Rs 1, R ' 1 and the R2 of the concavo-convex rectangle rib of described punch ring, R ' 2 are generally greater than 10mm, in the scope less than 100mm.The R3 of bed die, R ' 3 and R4, R ' 4, generally greater than 10mm, in the scope less than 100mm.Because between punch and the bed die the thick glass of 3-10mm is arranged, so, the R3 on bed die, R ' 3≤punch R1, R ' 1, the R2 of the R4 on the bed die, R ' 4 〉=punch, R ' 2.Because the product that utilizes this die production is as shown in Figure 2, can shorten from glass awl rectangular aperture portion to the distance the neck osculum, also just shortened the depth thickness of indicating meter or televisor, can make cathode tubes such as televisor, indicating meter reach flattening.If again by physical strengthening or chemical enhanced mode, the intensity of strengthening glass bulb just can reduce the volume and weight of indicating meter, televisor, and then can realize lightweight.And the beam deflection angle of utilizing the product of this glass cone mould production that electron beam gun is launched reaches and has 80 degree---145 degree scopes, can make televisor, indicating meter etc. realize maximizing.General televisor producer with the certain distance position reference line R/L of product sealing-in limit to the awl deflector, then, to be referenced as benchmark, determines relevant position when product is provided, mould also is like this.Another feature of this mould punch from punch reference line R/L, is being parallel on the medullary ray O1 direction as shown in Figure 4, to the distance of R1, R ' 1 be greater than from reference line R/L to R2, the distance of R ' 2.Promptly be illustrated in H2, H ' 2＞h2, h ' 2 among Fig. 4, Fig. 5, and H2 〉=H ' 2, h2 〉=h ' 2.From punch medullary ray O1, in punch longitudinal axis L A (minor axis SA) direction to the distance of R2, R ' 2 greater than from punch medullary ray O1, on punch longitudinal axis L A (minor axis SA) direction ray, arrive the distance of R1, R ' 1, be D2＞d2, S2＞s2, as shown in Figure 5, equally, from bed die reference line R/L, on the direction that is parallel to medullary ray O2, distance to R3, R ' 3 is greater than from bed die reference line R/L to R4, the distance of R ' 4, be H1, H ' 1＞h1, h ' 1 and H1 〉=H ' 1, h1 〉=h ' 1.From the medullary ray O2 of bed die, on the long axis direction LA of bed die (minor axis SA), to the distance of R4, R ' 4 greater than from bed die medullary ray O2, on the ray of bed die longitudinal axis L A (minor axis SA) direction, to the distance of R3, R ' 3.Use the method for this die production glass awl to utilize hydraulic press to form.The bed die that is about in this invention is positioned on the worktable of multi-work-station press, makes gob drip the into bottom of bed die, utilize punch in this invention that is installed on the press drift by certain pressure, certain lowering speed, in the regular hour, suppress formation.The concavo-convex rectangle rib ring that designs in concavo-convex rectangle rib ring that designs in the punch of mould and the bed die can make the fused glass metal creep to the mould circle sealing-in limit that places bed die top equably from the bottom speed of mould smoothly in forming process, the radian mean value R of the concavo-convex rectangle rib ring portion of mould, general in greater than the scope of 10mm less than 100mm, could guarantee like this to become in the process glass metal successfully upwards to creep along this bed die in taper, and form slick and sly surface and have less stress, simultaneously, just can guarantee the steady setting of glass awl upper deflecting coil after the moulding.Two R mean values of punch and bed die, if less than 10mm, on two R positions of the interior outside of product, just be easy to generate the stress concentration phenomenon, the operation that is unfavorable for back such as annealing, even can on two R positions, just be easy to generate the stress concentration phenomenon, the operation that is unfavorable for back such as annealing, even can in moulding, burst, simultaneously, the R2 of punch, R ' 2 and main part, R1, R ' 1 also is not easy transition sleekly with the glass precursor solution of deflector, and the R4 on the bed die, R ' 4 and main part, R3, R ' 3 also forms the glass outer surface that has the wrinkle shape in R portion easily with deflector, or the outside surface of crackle shape, after glass awl and glass shielded sealing-in, this defective was under vacuum state, easily produce quick-fried phenomenon such as contract.So the above-mentioned mean value of radian R can play the effect of alleviation, lax glass strain in this scope.The another one purpose that forms this concavo-convex rectangle rib ring glass awl with this mould is exactly that protuberance and the depressed part that forms can increase glass intensity, can play the effect of stiffening web at two R places, and because the strength that the glass pressing force that the part except that two R portions is subjected to when die for molding does not all have two R portions to be subjected to is big, two R portions are subjected to the vertical movement direction of force direction near the press-molding punch.Therefore, the pressure that R portion is subjected to is greater than the pressure that other positions of cone are subjected to, and the intensity that the glass after the moulding is bored two R places of concavo-convex rectangle rib ring is greater than the side-walls of awl.Radius R 1, the R ' 1 of concavo-convex rectangle rib ring place two radians of described punch should be in the scopes of 0.1≤R1, R ' 1/R2, R ' 2≤10 with the ratio of R2, R ' 2.The radius R 3 of concavo-convex rectangle rib ring place two radians of described die, R ' 3 also should be in the scopes of 0.1≤R3, R ' 3/R4, R ' 4≤10 with the ratio of R4, R ' 4.If be lower than 0.1 or be higher than 10, can cause that equally the stress of glass is excessively uneven, the unequal phenomenon of intensity.Another advantage of boring with the glass of this concavo-convex rectangle rib ring structure die production is, the glass of this structure is bored and is compared less than the common glass awl of the deflection angles of 145 degree greater than 80 degree, the intensity height, so glass bulb can attenuate, its weight can reduce 10-35%, if utilize physical strengthening, method such as chemical enhanced to carry out intensive treatment, thickness can also attenuate, and weight can also alleviate.

In order to guarantee the stability of product size, must guarantee the stability of mould.The material that this mould uses should be the stainless steel that deflection is relatively stable and deflection is very little under hot or the cold conditions.Because the glass awl is continuously large-scale pipelining in pressing process, and mould is wanted the nearly 1000 ℃ glass metal of press temperature.In order to make mould keep certain temperature, therefore, in process of production, the temperature-stable of punch is very important.So, need cool off mould.Generally in the awl punch, need in punch inside punch to be cooled off, and the gas circuit of punch inside is two different loops of route with the water route with water coolant and cooling air.The cooling of punch as shown in Figure 3, water coolant enters from inlet, through the over-allocation stick harness, flows out from three angles of stick harness and to enter the divider, flows out the region of interest of cooling punch the reticulated cell from divider.Decide according to the difference of heated part at the mesh position, and flow out at the water outlet place that the water after heating up in the process of cooling flows to through between divider and punch main body on the punch head again, turns back to cooling water system cooling back recycle.But water coolant just cools off the part except that the microcephaly of punch.Because the too little water-cooled of can not utilizing of microcephaly's part area is cooled off, in the awl punch, the general using cooling air cools off little head part, as Fig. 4, cooling air enters from the lateral gas inlet of punch head, flows into stick harness, blow out from cooling jacket, then the microcephaly is cooled off, flow out from cooling jacket and the middle air outlet that turns back to stick harness inside of cooling jacket through cooled hot gas again, the air from the punch head turns back to cooling air system.In order to prevent that the microcephaly from leaking at cooling jacket and the little head of punch, used O type wear ring.Light and the rustless alloy of the general operating weight of above-mentioned divider is as copper, aluminum.In order to guarantee the cooling performance of punch, to maintain a certain distance between punch and the divider.This divider is fixing on the cover board, cover plate is fixed on the punch head, the punch head is connected with the drift of press, move up and down, bed die is positioned on the press bed that is rotating, and general press has the station of 11 or 22 placement bed dies to constitute, stop once every a station press, suppress and other work, the press drift descends on one of them station, and compacting drips to the gob in the bed die.

Bed die is made up of bed die main body and base, except that bed die has concavo-convex rectangle rib ring, microcephaly's segment thickness of bed die is big, because heat radiation is not so good, generally open several radiating grooves in the outside of bed die, make little head can obtain the temperature roughly the same, the stress of product is kept relative stability, help producing with main part.The bottom of base is the base that the press with compacted products mates, all utilize the combination of key and cylinder and press between general press and the mold base, in order to make punch and bed die in compacting, obtain the identical thickness of periphery, good precision, in pressing process, except press itself has certain precision, in punch, bed die and mould circle, utilize guide pillar to guarantee three's consistence.Guide pillar is installed on the punch head, move up and down with punch, and guide pillar moves up and down in the lifting ear of mould circle and bed die.General punch guide pillar requires height with gap precision between bed die and mould circle, generally between between the 0.02-0.15mm.So just can guarantee to produce high-quality product.Certainly, the high-precision digital control processing lathe of the same needs of the precision of mould waits and finishes.

Utilize the glass awl of this die production to be complementary with the sphere of 54CM-96CM, super flat, pure flat glass screen, the formation cathode tube is applied in indicating meter and the televisor.The invention has the beneficial effects as follows, adopt the glass awl product of the concavo-convex rectangle rib of having of this die production ring, can make bulb for cathode-ray tube have in light weight, longitudinal degree is little, advantages of high strength, has satisfied the glass bulb flattening, and even the requirement of televisor flattening.

Description of drawings

Fig. 1 is existing traditional glass bulb for cathode-ray tube schematic cross-section

Fig. 2 a is the bulb for cathode-ray tube synoptic diagram with machicolated form rib ring glass awl

Fig. 2 b is the bulb for cathode-ray tube orthogonal cross-sections synoptic diagram with machicolated form rib ring glass awl

Fig. 3 is the schematic cross-section that utilizes mould molding glass awl

Fig. 4 is existing glass bulb for cathode-ray tube punch schematic cross-section

Fig. 5 is the schematic cross-section with cathode tube bed die of machicolated form rib ring glass awl

Fig. 6 is the schematic cross-section with cathode tube punch of machicolated form rib ring glass awl

Fig. 7 is the mould circle

Embodiment

Represent traditional bulb for cathode-ray tube schematic cross-section with reference to Fig. 1, Fig. 2 is the glass awl that utilizes the die production among the present invention, Fig. 3 is the state in the pressing process, the outside of punch 1 is to be that R1, R ' 1 and R2, R ' 2 constitute concavo-convex rectangle rib ring by 2 radian differences, radius that concave and convex direction is roughly opposite, between the R1 of two radian, R2 and R ' 1, the R ' 2 is to connect smoothly, and two ends in addition of jog link to each other with main part with the deflector of punch respectively.Fixing punch 1 below punch head 4 is glass awl 6 in the middle of bed die 2 and punch 1, mould circle 3 is arranged on bed die 2, the divider cover plate 10 that is fixed on below the punch head 4 is arranged in the inside of punch 1, the following divider 12 of fixing that distributes air cover board 10, mesh is arranged on divider, this mesh is that the water that will enter from punch head 4 central part IN flows to the divider 12 from stick harness 11 central authorities along inclined hole, carry out the cooling of punch 1 at the inner face that flows to punch 1 from divider 12, flow out in the chilled(cooling) water return (CWR) of returning from OUT through cooled water water is cooled off.Cooling air wherein is that cooling gas inlet 16 places among Fig. 6 feed cooling air, enter the gas circuit ingress of stick harness 11 inside among Fig. 3, blow to microcephaly inside from the top of cooling jacket 13 through cooling jacket and carry out air cooling, cooled hot gas is got back to the cold gas recycle system from being located at punch head 4 lateral vapor pipes 17 then from turning back to the gas outlet holes that are located in the stick harness 11 between cooling jacket 13 and the cooling cover 14.Punch 1 is installed on the drift of press, move up and down, punch 1 is to utilize the guide pillar 15 that is installed in punch head 4 ears localized with the accurate location of bed die 2 and mould circle 3, the bottom of guide pillar 15 is chamfering shapes, when guide pillar enters carrying in the living ear of mould circle 3 and bed die 2, three's medullary ray O1 and O2 will be kept point-blank, guarantee the precision of product and the consistence of glass awl thickness.The inboard of bed die 2 also is to be that R3, R ' 3 and R4, R ' 4 constitute concavo-convex rectangle rib ring by 2 radian differences, radius that direction is roughly opposite, between two radian R3, R ' 3 and the R4 is to connect smoothly, and the other end of two R portions links to each other with main part with the bed die deflector respectively.The outside microcephaly portion 24 of bed die 2 has the microcephaly portion 24 of 23 pairs of bed dies 2 of a cooling tank to cool off.

When punch 1 dropped to specified altitude, glass metal just crawled into 31 places, position, sealing-in limit of mould circle.Utilize estimator 21 to shift glass awl 6 onto certain altitude after the moulding, and then take out glass awl 6 and send into next operation and process.

Claims (6)

1. flat-shaped cathode-ray tube glass cone mould, comprise punch, bed die and the mould circle of making the glass awl, it is characterized in that, described punch is to be that R1, R ' 1 and R2, R ' 2 constitute concavo-convex rectangle rib ring by 2 radian differences, radius that concave and convex direction is roughly opposite, be smooth connection respectively between two radian R1, R2 and R ' 1, the R ' 2, two ends in addition of jog link to each other with main part with the deflector of punch respectively; Described bed die is to be that R3, R ' 3 and R4, R ' 4 constitute concavo-convex rectangle rib ring by 2 radian differences, radius that concave and convex direction is roughly opposite, be smooth connection respectively between two radian R3, R4 and R ' 3, the R ' 4, two ends in addition of jog link to each other with main part with the deflector of bed die respectively; Since between punch and the bed die the thick glass of 3-10mm is arranged, therefore, the R1 on the R3 on the bed die, the R ' 3≤punch, R ' 1, the R2 on the R4 on the bed die, the R ' 4 〉=punch, R ' 2; For guaranteeing to become in the process glass metal upwards to creep smoothly along this bed die in taper, and form slick and sly surface and have less stress, R1, R ' 1, R2, R ' 2, R3, R ' 3 and R4, R ' 4 should be in greater than the scope of 10mm less than 100mm; Excessively uneven for the stress that prevents glass, should satisfy 0.1≤R1, R ' 1/R2, R ' 2≤10,0.1≤R3, R ' 3/R4, R ' 4≤10 between R1, R ' 1, R2, R ' 2, R3, R ' 3 and R4, the R ' 4.

2. according to the described flat-shaped cathode-ray tube glass cone mould of claim 1, it is characterized in that the made glass of this glass cone mould awl has 80 degree--the subtended angle of-145 degree scopes, and be complementary with the sphere of 54CM-96CM, super flat, pure flat glass screen.

3. according to the described flat-shaped cathode-ray tube glass cone mould of claim 1, it is characterized in that,, be parallel on the medullary ray O1 direction from punch reference line R/L, to the distance of R1, R ' 1 be greater than from reference line R/L to R2, the distance of R ' 2; From punch medullary ray O1, in punch longitudinal axis L A minor axis SA direction to the distance of R2, R ' 2 greater than from punch medullary ray O1, on punch longitudinal axis L A minor axis SA direction ray to the distance of R1, R ' 1.

4. according to the described flat-shaped cathode-ray tube glass cone mould of claim 1, it is characterized in that, from bed die reference line R/L, on the direction that is parallel to medullary ray O2, to the distance of R3, R ' 3 be greater than from bed die reference line R/L to R4, the distance of R ' 4; From the medullary ray O2 of bed die, on the long axis direction LA of bed die short-axis direction SA, to the distance of R4, R ' 4 greater than from bed die medullary ray O2, on the ray of bed die longitudinal axis L A minor axis SA direction, to the distance of R3, R ' 3.

5. according to the described flat-shaped cathode-ray tube glass cone mould of claim 1, it is characterized in that the punch inside of this mould has cooling water circulation loop; Has the cooling air circulation loop in its microcephaly inside.

6. according to the described flat-shaped cathode-ray tube glass cone mould of claim 1, it is characterized in that the gap precision between punch guide pillar and bed die and mould circle is between the 0.02-0.15mm scope.

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