KR100392104B1 - Manufacturing method of electron tube stem and electron tube, manufacturing device thereof, electron tube stem and electron tube - Google Patents

Abstract

The present invention provides an apparatus for producing an electron tube stem, which is capable of producing a high quality electron tube stem by appropriately arranging the lead lines.

The wells 5 are inserted into the wells insertion groove 17 of the mold lower mold 12 while the roller body 22 is vertically moved. Since the coil spring 37 presses the roller body 22 in the shrinking direction, the wells 5 are pressurized radially and evenly radially in the radial direction of the mold lower mold 12 so that the coil spring 37 is lowered in the mold 12. Press to support in the center of the direction. Since the roller body 22 is free to rotate with the ball 26, it moves easily also when the wells 5 are moved up and down. Since the position shift of the wells 5 can be prevented when forming the electron tube stem 1 by press molding, the pitch circle of the wells 5 can be kept in a perfect circle, and the leak by the electron tube stem 1 can be prevented. Defects can be prevented.

Description

TECHNICAL MANUFACTURING METHOD OF ELECTRON TUBE STEM AND ELECTRON TUBE, MANUFACTURING DEVICE THEREOF, ELECTRON TUBE STEM AND ELECTRON TUBE}

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an electron tube stem having an introduction line, a method for producing the electron tube, an apparatus for manufacturing the same, an electron tube stem and an electron tube.

Generally, as shown in Figs. 3 and 4, the electron tube stem 1 of the glass tube has a stem band-shaped stem pedestal 2, and a hole 3 is opened in the center of the stem pedestal 2; have.

Moreover, the exhaust pipe 4 is attached to this hole 3, The wells 5 which are several lead wires in concentric shape centering on the center of the stem base 2 around this exhaust pipe 4 are centered. Is installed. And these wells 5 are inner lead 6 located inward of the stem base 2, the dumet line 7 located in the stem base 2, and the stem base 2 The diameter Di of the inner lead 6 which has the outer lead 8 located in the outer side, and is bent in the part of the dumet wire 7, is circular arc shape shorter than the diameter Do of the outer lead 8, or It is provided with the same diameter Di = Do, and the inner lead 6 is integrally fixed to the stem pedestal 2 by the fillet 9.

Here, if the manufacturing method of the electron tube stem 1 shown in FIG. 3 is demonstrated, several lower mold head parts which have a mold metal mold | die are provided on the turn table which drives intermittently, the wells 5 are inserted in a mold metal mold | die, and an upper mold | type is provided. The dummet line 7 of the wells 5 is bent by the press head, and the inner lead 7 is installed at a position smaller in diameter than the outer lead 8, and then the bead glass and the exhaust pipe 4 (not shown) are removed. After supplying, the lower mold head part is intermittently sent out while rotating itself, burned by preheating and heating with a burner, and another upper press head is pressed against the mold die of the lower mold head part to press the electromagnetic tube stem 1 by press molding. It forms, heats with a burner, removes the twist of the glass, and completes the electron tube stem 1.

However, the arrangement of the wells 5 of the electron tube stem 1 can be variously varied, for example, a part of the circumference is missing as shown in FIG. 4 or a tooth is missing as shown in FIG. 5. Since the turning of the glass hardly becomes even and the wells 5 are only inserted into the mold mold of the lower mold head part, the welds at the time of press molding due to the difference between the external dimension of the wells 5 and the pore size of the mold mold. Since (5) moves and the arrangement pitch circle of the wells 5 does not become a perfect circle, the position shift of the wells 5 occurs, which causes a lack of convex portions and a leak defect.

In addition, since the mold is heated and melted at the time of formation of the electron tube stem 1, the temperature of the mold die also rises to 40 ° C. to 500 ° C., and the wells 5 in the mold die are formed during the formation of the electron tube stem 1. Needs to be moved up and down, and there is a problem that the engagement tolerance of the wells insertion groove of the mold die cannot be made small.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an electron tube stem and a method for producing an electron tube, a manufacturing apparatus, an electron tube stem, and an electron tube, which can produce a high quality electron tube stem by arranging the introduction lines appropriately.

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the mold lower mold | type of one Example of the manufacturing apparatus of the electron tube stem of this invention.

2 is a cross-sectional view thereof.

Fig. 3 is a side view in which part of the general electron tube stem is notched;

4 is a plan view showing the arrangement of the lead lines of the electron tube stem;

Fig. 5 is a plan view showing the arrangement of lead lines of another electron tube stem;

Fig. 6 is a side view in which part of the upper mold head and the lower mold head for bending are shown, which are shown in their normal states;

Fig. 7 is a plan view showing the normal state of the upper head for bending.

Fig. 8 is a side view in which part of the upper and lower mold heads for bending are notched, showing a state in which the upper and lower heads are bent;

Fig. 9 is a sectional view of a mold lower mold in a state in which the wells are bent;

Fig. 10 is a side view in which part of the upper and lower mold heads for forming the first fillet are bent and notched;

Fig. 11 is a side view in which part of the upper mold head and the lower mold head for forming the second fillet are bent, notched;

(Explanation of the sign)

2 stem pedestal

4 exhaust pipe

5 Wells as lead line

12 Mold Lower

14 inner support

17 Wells insertion groove as lead wire insertion groove

21 Roller housing as outer support

22 Roller Body as Pressing Body

37 Coil Springs as Pressing Means

The present invention inserts a lead line into a lead line insertion groove formed in an outer circumferential wall in a radial direction from the center of an inner support of a mold lower mold having an inner support and an outer support provided at an outer circumference of the inner support at predetermined intervals. A bead glass is disposed, the bead glass is melted, the lead wire is pressed into the lead wire insertion groove, and the lead pedestal is pressed into the mold lower mold and the mold upper mold by pressing the lead wire into the lead wire insertion groove. As a result, the bead glass can be reliably positioned to form the stem pedestal by melting the bead glass while pressing the lead wire with a press body provided to face the lead wire insertion groove of the inner support.

In addition, the exhaust pipe is inserted into the exhaust pipe insertion groove of the mold lower mold, and the exhaust pipe is melted together with the bead glass, and the stem base and the exhaust pipe are integrally formed by the mold lower mold and the mold upper mold, thereby reliably positioning the lead line to the exhaust pipe on the stem pedestal. Can be integrated.

In addition, the mold upper mold has a bending mechanism for bending the lead wire, whereby the lead wire can be reliably positioned and the lead wire can be bent.

Further, a lead wire is inserted into a lead wire insertion groove formed in the outer peripheral wall in the radial direction from the center of the inner support of the mold lower mold having an inner support and an outer support provided at an outer circumference of the inner support, and inserted into the lead wire insertion groove. The lead wire is squeezed by pressing the lead wire, bending the lead wire in the state where the lead wire is pressed into the lead wire insertion groove, and pressing the lead wire with the press body provided to face the lead wire insertion groove of the inner support. Can be positioned to form a stem pedestal.

In addition, the press body moves freely toward the axis of the inner support body, and presses the lead wire of the lead wire inserting groove to press the lead wire toward the center from the outer circumferential surface side of the inner support, so that the lead wire can be simply pressed into the lead wire insertion groove. Can be.

In addition, the lead wire insertion groove is formed on the circumference to position the lead wire in correspondence with the arrangement of the lead wires.

Further, a plurality of lead wire inserting grooves are formed along the outer circumferential wall of the inner supporter at substantially equal intervals, so that the lead wires can be arranged at equal intervals.

In addition, the press body has a rotation axis in a direction orthogonal to the axis of the insertion line insertion groove formed on the circumferential diameter of the inner support, and is rotatable about this rotation axis, and is a roller shape that can be moved back and forth, so that the introduction line is easily formed at the time of formation. It can be pressed while positioning.

Moreover, since the pressurizing means is a spring which presses in a contraction direction in the annular shape which communicates the roller-shape rotational shaft of a press body, even if a lead wire is inserted only in part, a lead wire can be pressed uniformly.

Moreover, a plurality of press bodies are inserted into the center of the press body and have an annular spring having an urging force in the axial direction of the inner support body, and the press body supports the lead line, so that the press body is connected to the inner support body by the annular spring. It is pressed in the axial direction to properly support and position the lead wire.

In addition, since the spring is coiled, the lead wire can be pressed uniformly radially.

(Example)

EMBODIMENT OF THE INVENTION Hereinafter, one Example of the manufacturing apparatus of the electron tube stem of this invention is described with reference to drawings. In addition, the part corresponding to the part demonstrated by the conventional example is attached | subjected with the same code | symbol, and it demonstrates.

As shown in Fig. 1 and Fig. 2, (11) is a lower head portion, and the upper portion of the lower head portion 11 has a mold lower mold 12 constituting a mold mold, and the outer circumference of the mold lower mold 12 The flange part 13 which protruded in the circumference shape is provided in this, and this flange part 13 hangs on the lower head part 11, and is attached. In addition, the lower mold 12 has a circumferential inner support 14 having a circumference at its center, and an exhaust pipe insertion groove 15 is formed at the center of the inner support 14, and the exhaust pipe insertion groove 15 is formed. An upper portion of the arcuate taper 16 is formed to facilitate the insertion of the exhaust pipe 4.

Further, in the circumferential direction, which is the radiation direction of the outer circumferential wall of the inner support body 14, the wells insertion grooves 17 as plural lead-line insertion grooves having a semicircular cross section parallel to the axial direction of the inner support body 14 are equidistant at regular intervals. It is formed on the wells groove 17 has an opening 18 which is opened on the outer circumference of the inner support 14. In addition, as shown in Figs. 4 and 5, the pitch circle and the number of arrangement of the wells 5, which are the introduction lines, are different for the varieties of the electron tube stem 1, so that the wells for inserting the outer lead portion 7 of the wells 5 are inserted. By self-selecting the insertion groove 17, it can be set to arbitrary pitch circles and arrangement number.

Further, a groove-shaped roller accommodating portion 21 of a ring is formed on the outer circumferential side of the wells insertion groove 17 of the mold lower mold 12 as a coaxial outer support having a predetermined interval on the inner support 14. The housing portion 21 communicates with the wells insertion groove 17. Further, the roller housing portion 21 has a rotating shaft parallel to the tangent line of the roller-shaped roller body 22, preferably a ball bearing, corresponding to the wells insertion groove 17 as a pressing body, Advancing and moving freely toward an axis are stored. Moreover, this roller body 22 has the cylindrical support part 24 with the spring insertion groove 23 formed in the center, and is located coaxially with the support part 24 in the outer peripheral side of the ball bearing inner ring as this support part 24. As shown in FIG. The outer ring of the ball bearing as the cylindrical pressing portion 25 for pressurizing the pressing force to the outer lead 8 of the wells 5 is provided, and is located between the supporting portion 24 and the pressing portion 25 so as to be rotated. The ball 26 of the ball bearing which makes it free is provided, and the press part 25 is freely rotated with respect to the support part 24.

Moreover, the roller guide 31 meshes with the roller accommodating part 21, and the roller guide 31 is supporting the roller body 22 by this roller guide 31. As shown in FIG. The roller guide 31 is formed in a ring shape similarly to the roller housing portion 21, and has an engaging portion 32 which engages the roller housing portion 21 with an outer circumference substantially the same as the inner circumferential surface of the roller housing portion 21. And a support portion 33 formed so as to have a diameter small enough to form a clearance slightly larger than the radius of the roller body 22 from the outer circumference of the engaging portion 32, and protruding on the engaging portion 32. In the outer circumference of the support portion 33, a notch-shaped guide groove having a semi-circular shape is separated from the upper portion so as to form a clearance slightly larger than the radius of the inner diameter of the ball bearing inner ring constituting the roller body 22. 34) is formed throughout the periphery. Moreover, the roller guide 31 is equipped with the alignment body 36 for position alignment provided corresponding to the slit 35 formed continuously from the roller accommodating part 21 of the mold lower mold 12, and the roller guide ( The attachment to the mold lower mold 12 of 31 is facilitated. The inner diameter of the roller guide 31 is slightly wider than the diameter of the inner support 14 plus the diameter of the two wells insertion grooves 17 and 17 or the diameter of the outer lead 7. That is, a part of the outer ring of the ball bearing as the press part 25 protrudes inward rather than the inner diameter of the roller guide 31.

Then, the annular coil spring 37, which is an annular spring as the pressing means, is inserted into the hole of the inner ring as the spring insertion groove 23 of the plurality of roller bodies 22 to form a beads, and the coil spring 37 is It is caught in the guide groove 34 of the support part 33, radially arrange | positioned in the state which pressed the roller body 22 to the axial direction of the inner support body 14 which is a contraction direction, and the outer periphery of the roller body 22 was each It faces the corresponding wells insertion groove 17, and advancing and advancing with respect to these wells insertion groove 17 is made free.

Next, the upper head 41 for bending is demonstrated with reference to FIGS.

6 to 8, the upper head 41 is located at four corners of a rectangular shape in plan view, and four guide shafts 42 are provided in parallel. And the board | substrate 43 is fixed to the lower end of these guide shafts 42 with the nut 44, and the mold upper mold | type 45 is provided in the lower surface of this board | substrate 43 facing the mold lower mold | type 12. As shown in FIG.

The mold upper die 45 has a diameter at a position where the circumferential center guide 46 is mounted on the substrate 43 with a bolt 47 to face the exhaust pipe insertion groove 15, and faces the roller guide 31, respectively. An almost plate-like moving member 50 that can move along the direction is provided radially. The front end of the movable body 50 is formed with a molding claw 51 having a thin front, and the inner lead 6 of the wells 5 is supported at the front end of the molding claw 51. A supporting recess 52 having an arc-shaped cross section along the longitudinal direction of (6) is formed.

Moreover, the movable body 50 has a cam hole 53 which opens in the up-down direction, The cam hole 53 is attached with the pin 54 which has an axial direction along the thickness direction of the movable body 50, and The roller 55 is rotatably attached to the pin 54. Then, the cam plate 57 is inserted into the cam hole 53 so as to be movable in the vertical direction, and the cam groove 58 in which the roller 55 is movable in the inclined up and down direction is inserted into the cam plate 57 from the bottom to the outside. It is inclined inward and is formed. Moreover, the cam plate 57 is also located in the insertion hole 59 which penetrates in the up-down direction formed in the board | substrate 43, and is movable in the up-down direction.

In addition, these cam plates 57 are radially attached to the guide plate 61 similarly to the movable body 50, and the guide plate 61 is a cylindrical guide bush 62 inserted into the guide shaft 42. The guide bush 62 is attached to the guide shaft 42 so as to be movable in the vertical direction.

In addition, a slide case 63 is attached to the lower side of the movable body 50, and the slide case 63 is provided with a receiving recess 64 in which a tip of the movable body 50 is located at the center thereof. A wells insertion portion 65 through which the wells 5 are inserted is formed at the center of the 64, and a cam plate insertion hole 66 through which the cam plate 57 can be inserted is radially formed in the peripheral portion similarly to the cam plate.

And, when the guide plate 61 is located on the upper side of the mold upper mold 45, as shown in Fig. 6, the cam plate 57 is also located on the upper side, and the roller 55 is positioned by the cam groove 58 rather than the center thereof. It is located outside, and since the moving body 50 is located slightly outside of the center guide 46 through the clearance, it is located in the state which does not press the inner lead 6 of the wells 5.

When the guide plate 61 is lowered, as shown in Fig. 7, the cam plate 57 is also lowered along the guide plate 61, and the roller 55 is moved by the cam groove 58 to the center guide 40. As shown in FIG. The inner lid 6 of the wells 5 is supported by the support recess 52 at the tip of the shaping claw 51 of the movable body 50, and the shaping claw 51 of the movable body 50. ) Presses the inner lead 6 of the wells 5 to bend the dumet wire 7, and as shown in FIG. 9, the inner lead 6 is positioned more than the diameter of the circumference of the outer lead 8. The diameter of the circumference is reduced.

In addition, the upper head 71 for 1st fillet shaping | molding is demonstrated with reference to FIG.

The upper head 71 for the first fillet molding shown in FIG. 10 engages with the protruding portion above the mold lower mold 12 and at the same time, forms a concave stem stand forming portion 72 that forms the stem pedestal 2. Is formed, and the inner lead insertion hole 73 for inserting the inner lead 6 of the wells 5 upward from the stem stand forming portion 72 is formed, and the stem of the inner lead insertion hole 73 is formed. On the side of the formation part 72, the taper part 74 which introduces the inner lead 6 when the upper head 71 for 1st fillet shaping | molding is lowered is formed.

Then, the stem pedestal 2 is primarily formed by lowering the upper head 71 for first fillet molding in the direction of the mold lower mold 12.

In addition, the upper head 76 for the second fillet molding will be described with reference to FIG.

The upper head 76 for the second fillet molding shown in FIG. 11 engages with the portion protruding upward of the mold lower mold 12 and at the same time a concave stem stand forming portion 72 forming the stem pedestal 2. ) Is formed, and an inner lead insertion hole 78 for inserting the inner lead 6 of the wells 5 from the stem stand forming portion 72 upward is formed, and the inner lead insertion hole 78 of the inner lead insertion hole 78 is formed. On the stem stand forming part 72 side, when the upper head 76 for 2nd fillet molding is lowered, the fillet forming part 79 which forms the fillet 9 located around the inner lead 6 is formed. It is.

Then, by lowering the upper head 76 for the second fillet molding in the direction of the mold lower mold 12, the stem base 2 is formed and the remaining bead glass of the stem base 2 is filled with the fillet forming unit 79. ) To form a fillet (9).

Next, manufacture of the electron tube stem 1 of the said Example is demonstrated.

First, the wells 5 as lead lines as necessary, while moving the roller body 22 as a press body longitudinally to the wells insertion groove 17 as the lead line insertion groove of the mold lower mold 12 at the loading position of a rotary table (not shown). Insert Then, when the wells 5 are inserted into the wells insertion grooves 17, the wells 5 are attached to all of the wells insertion grooves 17 in order to press the coil spring 37 in the contracting direction of the roller body 22. Irrespective of the number of wells 5 mounted even in a state of not being mounted, the mounted wells 5 are pressurized radially equally along the radial direction of the mold lower mold 12 so that the coil spring 37 is provided with the mold lower mold 12. Is pressed in the center direction of the support.

Moreover, since the support part 24 and the press part 25 of the ball bearing suitable as the roller body 22 are supported by the ball 26, the press part 25 rotates easily and the wells 5 are moved up and down. Even when it is moving in the direction, the wells 5 can be moved up and down easily.

Next, the mold upper mold 45 is installed on the mold lower mold 12, the mold upper mold 45 is positioned above the guide plate 61, and the wells 5 are moved between the movable body 50 and the center guide 46. The inner lead 6). At this time, since the roller 55 is located outside the center by the cam groove 58, and the moving body 50 is located slightly outside the gap with respect to the center guide 46, the inner lead of the wells 5 Do not press (6).

In this state, when the guide plate 61 is lowered, as shown in Fig. 7, the cam plate 57 is also lowered along the guide plate 61, and the roller 55 is the center guide 46 by the cam groove 58. The inner lid 6 of the wells 5 is supported by the support recess 52 at the tip of the forming claw 51 of the movable body 50, and the molding claw of the movable body 50 is pressed and moved. 51 presses the inner lead 6 of the wells 5 to bend the dumet wire 7, and as shown in FIG. 9, the inner lead 6 is larger than the diameter of the circumference of the outer lead 8. Reduce the diameter of the circumference where) is located.

In addition, since the outer lead 8 of the wells 5 is press-fixed and fixed to the mold lower die 12 by the roller body 22 when the dummet line 7 is bent, the position shift of the wells 5 and the like can be adjusted. Since it can prevent, the pitch circle of the wells 5 can be maintained as a perfect circle, and the leak defect by the electromagnetic tube stem 1 can be prevented.

After the wells 5 are molded, the bead glass of the exhaust pipe 4 and the stem pedestal 2 are disposed, and the bead glass of the exhaust pipe 4 and the stem pedestal 2 is heated and melted with a burner (not shown). .

Next, the upper head 71 for the first fillet molding is opposed to the mold lower mold 12 instead of the mold upper mold 45, and the upper head 71 for the first fillet molding is directed in the mold lower mold 12 direction. By lowering, the bead glass is melted with a burner (not shown) to form the stem pedestal 2 primarily by the stem base forming unit 72 and the stem pedestal 2 and the exhaust pipe 4 are melt-bonded. .

In this case as well, since the outer lead 8 of the wells 5 is fixed to the mold lower mold 12 by the roller body 22, the position shift of the wells 5 can be prevented. The pitch circle of the wells 5 can be maintained in a perfect circle, and leak leakage caused by the electron tube stem 1 can be prevented.

In addition, the upper head 76 for the second fillet molding is opposed to the mold lower mold 12 in place of the upper head 71 for the first fillet molding, and the upper head 76 for the second fillet molding is molded lower mold. By lowering in the direction of (12), the bead glass is melted with a burner (not shown), and the remaining portion of the bead glass of the stem pedestal 2 is extruded into the fillet forming part 79 to enter the fillet 9 and at the same time The thickness of the stem pedestal 2 becomes thin to form the stem pedestal 2.

In this case as well, since the outer lead 8 of the wells 5 is fixed to the mold lower mold 12 by the roller body 22, the position shift of the wells 5 can be prevented. The pitch circle of the wells 5 can be maintained in a complete circle, and leakage failure by the electron tube stem 1 can be prevented.

The above-described process is carried out sequentially at each position of the index type turntable (not shown), whereby the production of the electron tube stem is automated.

In addition, since the roller body 22 is axially supported by the coil spring 37 and inserted into the guide groove 34, the arrangement and number of the roller bodies 22 also increase or decrease in correspondence with the arrangement and the number of the wells 5. It is possible to easily cope with a variety of varieties. In addition, in the present embodiment, the diameter Di of the inner lead 6 has been described with an example shorter than the diameter Do of the outer lead 8, but it is also applicable to the case of Di = Do. By selecting the material of the agent, it can be used even under conditions of high temperature and can be used in a mass production machine. The electron tube stem thus formed is attached to the electron gun. In addition, a fluorescent surface is formed in a vacuum enclosure having a neck portion, a shadow mask is provided in the vacuum enclosure, and an electron tube having the above-described effect is formed by attaching the electron gun to the neck portion of the vacuum enclosure.

According to the present invention, the lead wire can be reliably positioned by pressing the lead wire with a press body provided opposite the lead wire insertion groove of the inner support, and the quality of the electron tube stem and the electron tube using the electron tube stem can be improved.

Claims (17)

The lead wire is inserted into the lead wire insertion groove formed in the outer circumferential wall in the radial direction from the center of the inner support of the mold lower mold having the inner support and the outer support provided at a predetermined interval on the outer circumference of the inner support, Placing bead glass on the mold lower mold, Melt this bead glass, Press the lead wire into the lead wire insertion groove, A method of manufacturing an electron tube stem, wherein the stem pedestal is formed by the molten bead glass in a mold lower mold and a mold upper mold in a state where the lead wire is pressed into the lead wire insertion groove. The method of claim 1, Insert the exhaust pipe into the exhaust pipe insertion groove of the mold lower mold, A method for producing an electron tube stem, wherein the exhaust pipe is melted together with the bead glass to integrate the stem pedestal and the exhaust pipe by the mold lower mold and the mold upper mold. The lead wire is inserted into the lead wire insertion groove formed in the outer circumferential wall in the radial direction from the center of the inner support of the mold lower mold having the inner support and the outer support provided at a predetermined interval on the outer circumference of the inner support, Press the lead wire into the lead wire insertion groove, A method for manufacturing an electron tube stem, wherein the lead wire is bent while the lead wire is pressed into the lead wire insertion groove. An electron tube stem manufactured by the method for producing an electron tube stem according to claim 1. In the manufacturing method of the electron tube in which the fluorescent surface is formed in the vacuum enclosure which has a neck part, the shadow mask is installed in a vacuum enclosure, and the electron tube stem of the electron gun which has an electron tube stem is attached to the neck part of the said vacuum enclosure. The said electron tube stem was manufactured by the manufacturing method of the electron tube stem in any one of Claims 1-3, The manufacturing method of the electron tube characterized by the above-mentioned. An electron tube manufactured by the method for producing an electron tube according to claim 5. A mold lower mold having an inner support having a circumferential surface and an outer support provided at a predetermined interval on the outer circumference of the inner support; A plurality of lead wire insertion grooves into which a lead line formed along the axial direction of the inner support body is inserted into an outer circumferential wall in a radial direction from the center of the inner support body; A pressurizing body for pressurizing a pressing force to each of the lead lines provided on the inner side of the outer supporter to face the lead line insertion groove; An apparatus for producing an electron tube stem, comprising a bead glass attached to the mold lower mold and a mold upper mold encapsulating an introduction line. The method of claim 7, wherein The mold lower mold has an exhaust pipe insertion groove into which the exhaust pipe is inserted into the inner support. The method according to claim 7 or 8, The mold upper mold has a bending mechanism for bending an introduction line. The method of claim 7, wherein The press body moves freely toward and away from the inner core of the inner support body, and presses the lead wire of the lead wire insertion groove, wherein the electron tube stem is manufactured. The method of claim 7, wherein The lead wire insertion groove is a device for manufacturing an electron tube stem, characterized in that formed on a diameter The method of claim 7, wherein The introduction line insertion groove is a device for producing an electron tube stem, characterized in that formed in plurality at substantially equal intervals along the outer peripheral wall of the inner support. The method of claim 7, wherein The press body has a rotation axis in a direction orthogonal to the axis of the lead wire insertion groove formed on the circumferential diameter of the inner support, and has a roller shape which is rotatable and retractable about this rotation axis. The method of claim 13, The pressurizing means is a spring which presses in a contraction direction in a substantially annular shape in communication with a roller-shaped rotating shaft of the press body. The method of claim 7, wherein The press body has a plurality of annular springs inserted into the center of the press body and having an urging force in the axial direction of the inner support, and supporting the lead wire by the press body. The method according to claim 14 or 15, And said spring is in the shape of a coil. In a vacuum enclosure having a neck portion, a fluorescent surface is formed, a shadow mask is provided in the vacuum enclosure, and the electron tube stem of the electron gun having the electron tube stem is attached to the neck portion of the vacuum enclosure. An apparatus for producing an electron tube, comprising the apparatus for producing an electron tube stem according to claim 7.