CN2684369Y - Glass cone mould for flat CRT - Google Patents

Abstract

A glass cone mould for flat CRT belonging to the field of the production of the glass casing of Cathode Ray Tube comprises a terrace die for the production of glass cone, a bottom die and a die. The terrace die is formed by two concave-convex rectangle prism rings with different degrees of arc and approximately opposite concave-convex directions, and the radiuses of the two concave-convex rectangle prism rings are R1, R'1 and R2, R'2. The two degrees of arc of R1, R2 and R'1, R'2 are respectively smoothly connected, and the other two ends of the concave-convex part are respectively connected with the deflection part and the main body part of the terrace die. Adopting the glass cone made by the mould, the glass casing of the Cathode Ray Tube has the characteristics of light weight, low longitudinal degree and high intensity, satisfying the requirements of the flatting of the glass casing or even the television set.

Description

The flat-shaped cathode-ray tube glass cone mould

Technical field

The utility model belongs to bulb for cathode-ray tube production line field, specially refers to the mould of the manufacturing flat-shaped cathode-ray tube glass awl that is used for flattening television set and display.

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 given size 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 deflecting 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 gun of having assembled, the sealing back is at sealing state of the inner formation of glass bulb connector, utilize deairing step, inside is formed vacuum state, the effect of external pressure makes the inner formation of glass bulb connector certain negative pressure strong, and its vacuum degree 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 resistance is powerful inadequately, will under the effect of vacuum stress, cause fatigue rupture; In addition, because glass bulb itself exists the compressive resistance that certainly will reduce glass bulb as glass defects such as bubble, crackles, under the effect of vacuum stress, also can cause fatigue rupture.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 technological innovations, and one of them obviously promotes is exactly the complanation of product, has made the convex glass screen of traditional glass bulb into plane glass screen.But the planar glass screen structure makes the stress distribution of glass bulb connector 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 television set etc. at display devices such as television sets, 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 television set is subjected to the challenge of flat-panel monitor such as LCD TV, plasm TV etc. in recent years, the flattening exploitation innovation of television set enters the new stage once more, require requirement in light weight, shaped flat for satisfying the consumer, develop a kind of can vacuum-resistant stress, can make the cathode ray tube of display, television set 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 resistance 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 resistance 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 utility model technical issues that need to address 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: first concave arc degree along the downward process of glass awl neck claims R1, rise again and claim R2 through second cambered outwards radian, because the big mouthful of place's rectangular edges in awl bottom has long limit, the branch of minor face, just corresponding television screen has different Gao Yukuan, corresponding to growing the concavo-convex separately radian of limit and minor face is incomplete same, we add respectively ' distinguish, be R1, R ' 1, R2, R ' 2, be illustrated in Fig. 2, and be recorded in the following scheme), a kind of concavo-convex rectangle rib ring glass cone mould of bulb for cathode-ray tube, comprise 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.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.Described bed die also 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, connect smoothly 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 bed die deflector respectively.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 display or television set, can make cathode ray tubes such as television set, display 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 display, television set, and then can realize lightweight.And the electron beam deflecting angle of utilizing the product of this glass cone mould production that electron gun is launched reaches and has 80 degree---145 degree scopes, can make television set, display etc. realize maximizing.General television set 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 center line 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 center line O1, in punch longitudinal axis L A (minor axis SA) direction to the distance of R2, R ' 2 greater than from punch center line 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 center line 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 center line 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 center line 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 workbench of multistation 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 decrease 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 glass metal of fusion 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 outer 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 reinforcement at two R places, and because the strength that the glass press power 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 move both vertically 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 bed die, R ' 3 also should be in the scopes of 0.1≤R1, R ' 1/R2, R ' 2≤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 stabilization 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 cooling water and cooling air.The cooling of punch as shown in Figure 3, cooling water enters from inlet, through the over-allocation stick harness, flows out from three angles of stick harness and to enter the distributor, flows out the region of interest of cooling punch the reticulated cell from distributor.Decide according to the difference of heated part at the mesh position, and flow out at the delivery port place that the water after heating up in the cooling procedure flows to through between distributor and punch main body on the punch head again, and it is recycling to turn back to cooling water system cooling back.But cooling water 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 air intake of punch head side, flows into stick harness, blow out from coolant jacket, then the microcephaly is cooled off, flow out from coolant jacket and the middle gas outlet that turns back to stick harness inside of cooling collar through cooled hot gas again, the air outlet slit from the punch head turns back to cooling air system.In order to prevent that the microcephaly from leaking at cooling collar and the little head of punch, used O type sealing ring.Light and the rustless alloy of the general operating weight of above-mentioned distributor is as copper, aluminum.In order to guarantee the cooling effect of punch, to maintain a certain distance between punch and the distributor.This distributor is fixing, and on the cover board cover plate is fixed on the punch head, and the punch head is connected with the drift of press.

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 consistency.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 ray tube is applied in display and the television set.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 television set 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 schematic diagram with concave-convex rib ring glass awl

Fig. 2 b is the bulb for cathode-ray tube orthogonal cross-sections schematic diagram with concave-convex 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 ray tube bed die of concave-convex rib ring glass awl

Fig. 6 is the schematic cross-section with cathode ray tube punch of concave-convex 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 distributor cover plate 10 that is fixed on below the punch head 4 is arranged in the inside of punch 1, the following distributor 12 of fixing that distributes air cover board 10, mesh is arranged on distributor, this mesh is that the water that will enter from punch head 4 central portion IN flows to the distributor 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 distributor 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 porch of stick harness 11 inside among Fig. 3, blow to microcephaly inside from the top of coolant jacket 13 through coolant jacket and carry out air cooling, cooled hot gas is got back to the cold gas circulatory system from the blast pipe 17 that is located at punch head 4 sides then from turning back to the gas outlet holes that are located in the stick harness 11 between coolant 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 to locate 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 center line O1 and O2 will be kept point-blank, guarantee the precision of product and the consistency 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 bath 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 (9)

1. the concavo-convex rectangle rib ring glass cone mould of a bulb for cathode-ray tube, 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.

2. according to the described glass cone mould of claim 1, it is characterized in that, 2 radius Rs 1, the R ' 1 of the concavo-convex rectangle rib ring on the described punch, R2, R ' 2 are general in greater than the scope of 10mm less than 100mm; 2 radius Rs 3, the R ' 3 of the concavo-convex rectangle rib ring on the described bed die, R4, R ' 4 are general in greater than the scope of 10mm less than 100mm.

3. according to the described glass cone mould of claim 1, it is characterized in that 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.

4. according to the described 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.

5. according to the described glass cone mould of claim 1, it is characterized in that, 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, and radius R 3, the R ' 3 of concavo-convex rectangle rib ring place two radians of bed die should be in the scopes of 0.1≤R1, R ' 1/R2, R ' 2≤10 with the ratio of R4, R ' 4.

6. according to the described glass cone mould of claim 1, it is characterized in that,, be parallel on the center line 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 center line O1, in punch longitudinal axis L A minor axis SA direction to the distance of R2, R ' 2 greater than from punch center line O1, on punch longitudinal axis L A minor axis SA direction ray to the distance of R1, R ' 1.

7. according to the described 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 center line 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 center line 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 center line O2, on the ray of bed die longitudinal axis L A minor axis SA direction, to the distance of R3, R ' 3.

8. according to the described 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.

9. according to the described 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.

Images