KR100414166B1 - Apparatus for manufacturing crt glass funnel - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing a glass funnel for a cathode ray tube having a plunger having a molding surface formed on the outside thereof, and a bottom mold which accommodates a glass gob and interacts with the plunger to form a glass funnel. It is formed along the longitudinal axis of the glass funnel toward the rear end has a mold forming part having the inclined inclined inclined mold, and a rod receiving portion is reduced in the radial direction and extended downward along the axial direction from the mold forming part, ; Along the axial direction has an ejecting portion accommodated in the rod accommodating portion for forming the glass of the glass funnel cooperatively with the mold forming portion, and extending in the axial direction from the ejecting portion to be exposed to the outside An ejecting rod installed to be liftable; It is characterized in that it comprises an elevating drive means for elevating the ejecting rod is installed on the outside of the bottom mold. Thereby, the manufacturing apparatus of the glass funnel for cathode ray tubes which can enlarge a yarn inclination comparatively is provided.

Description

Apparatus for manufacturing glass funnel for cathode ray tube {APPARATUS FOR MANUFACTURING CRT GLASS FUNNEL}

The present invention relates to an apparatus for manufacturing a glass funnel for a cathode ray tube, and more particularly, a cathode having a plunger having a molding surface formed thereon, and a bottom mold accommodating a glass gob and forming a glass funnel by interacting with the plunger. The present invention relates to an apparatus for producing a conventional glass funnel.

1 is a schematic plan view of a general apparatus for manufacturing a glass funnel for a cathode ray tube. As shown, here # 1 to # 11 represent each station of the apparatus for manufacturing a glass funnel for cathode ray tubes. An apparatus for manufacturing a glass funnel for a cathode ray tube has a column 23 and a turntable 21 installed to be rotatable with respect to the column 23. A plurality of stations # 1 to # 11 for forming and cooling the glass funnel are prepared in the circumferential region along the circumferential direction of the turntable 21, and the turntable 21 is rotated by two pitches.

In the first station, the glass goblet melted from the glass melting furnace is supplied on the bottom mold 22 disposed on the turntable 21 corresponding to each station. In the third station, the compression molding apparatus having the press device is the glass gob. Press to form a glass funnel. The fifth, seventh and ninth stations cool the glass funnel by spraying cooling air through the cooling device inside the molded glass funnel, and the natural funnel cooling of the glass funnel is performed in the eleventh, second and fourth stations. You lose. In the sixth station, the molded and cooled glass funnel is taken out from the bottom mold and transferred to the post process, and the eighth and tenth stations pass with the bottom mold empty.

2 is a cross-sectional view of a typical glass funnel for cathode ray tubes. As shown, the overall appearance of the glass funnel 30 has a funnel shape, and a surface 31 is formed in a thread in contact with a panel (not shown) at the wide open side end surface. The yarn 33 is formed on the opposite side of the yarn surface 31, and the upper region of the yarn 33 is cut along the cutting line C and then polished to form a neck joint surface.

FIG. 3 is a cross-sectional view of a bottom mold region of a conventional apparatus for manufacturing a glass funnel for cathode ray tubes, and FIG. 4 is an enlarged cross-sectional view of a region of a glass funnel formed by the bottom mold of FIG. 3. As shown in these figures, a molding surface 103 is formed inside the bottom mold 101 to form the appearance of the glass funnel 104, and the bottom region of the molding surface 103 along the axial direction. The mold forming part 107 is formed in the mold so that the mold 106 can be molded. The forming part 107 has a pulling angle r so that it can be easily separated from the bottom mold 101 after molding the glass funnel 104, and the pulling angle r is approximately 50 '(seconds).

The mold forming part 107 is installed to be able to move up and down along the axial direction, and an ejecting part 111 for forming the mold 106 cooperatively with the mold forming part 107 and an axial direction from the ejecting part 111. An ejecting rod 109 having a rod portion 113 extending along and installed to be exposed to the outside of the bottom mold 101 is installed.

On the other hand, in the third station which is installed on the bottom mold 101 so as to be elevated, and compresses the glass gob 105 accommodated in the bottom mold 101, the ejecting rod 109 moves upward from the lower side of the turntable (not shown). Is provided with a valve lifter 117. In addition, a sixth station is provided with a pressure cylinder (not shown) for pressing the ejecting rod 109 upward along the axial direction so that the molded glass funnel 104 can be taken out from the bottom mold 101.

By this configuration, when the bottom mold 101 in which the glass gob is accommodated from the first station reaches the third station, the valve lifter 117 is lifted to support the lower end of the ejecting rod 109. Then, the plunger 102 installed above the bottom mold 101 descends to press the glass gob 105, and the ejecting part 111 accommodated in the mold forming part 107 is pressed with the pressurized glass gob 105. Will descend together. At this time, the valve lifter 117 gradually lowers the supporting pressure from the initial pressure in response to the pressing force of the glass gob 105, and ejects when the tip of the ejecting part 111 reaches the distal region of the mold 106. The lowering of the rod 109 is stopped.

When the plunger 102 is withdrawn and the bottom mold 101 reaches the sixth station through a series of cooling processes, the pressure cylinder disposed below the turntable moves upward to pressurize the ejecting rod 109. As the ejecting portion 111 of the ejecting rod 109 presses the mold 106, the shaped glass funnel 104 is spaced apart from the forming surface 103 of the bottom mold 101 and the glass funnel 104 is shown. Picked up by a non-pickup member and transported to a later process.

By the way, in the conventional apparatus for manufacturing a glass funnel for cathode ray tubes, the ejecting portion of the ejecting rod is formed to be raised while lifting up in the forming portion, so that the distance between the ejecting portion and the forming portion is increased when the inclined angle is increased. It becomes large, and the glass gob is interposed between these intervals, causing the lifting and lowering of the ejecting rod and the defect of the glass funnel. Therefore, when the inclination angle is reduced, the pressing force for pressurizing the ejecting rod is increased to separate the molded glass funnel from the bottom mold, thereby shortening the life of the ejecting rod and frequently replacing the ejecting rod. There is a problem.

Accordingly, an object of the present invention is to provide an apparatus for producing a glass funnel for a cathode ray tube, which can relatively increase the inclination angle.

1 is a schematic plan view of an apparatus for manufacturing a glass funnel for a typical cathode ray tube;

2 is a cross-sectional view of a typical glass funnel for cathode ray tubes;

3 is a cross-sectional view of a bottom mold region of a conventional apparatus for manufacturing a glass funnel for cathode ray tubes;

FIG. 4 is an enlarged cross-sectional view of the region of the glass funnel formed by the bottom mold of FIG. 3; FIG.

5 is a cross-sectional view of a bottom mold of the apparatus for manufacturing a glass funnel for a cathode ray tube according to the present invention;

FIG. 6 is an enlarged view of a region of a glass funnel formed by the apparatus for manufacturing a glass funnel for a cathode ray tube of FIG. 5;

7 is an enlarged view illustrating main parts of the ejecting rod of FIG. 5;

8 is a cross-sectional view taken along the line VII-VII of FIG. 7;

9 and 10 are views showing the loading and pressing state of the glass gob of the manufacturing apparatus of the glass funnel for the cathode ray tube of FIG.

11 is a cross-sectional view of the take-out station of the manufacturing apparatus of the glass funnel of FIG.

12 is a cross-sectional view of an apparatus for manufacturing a glass funnel for a cathode ray tube according to another embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

41: bottom mold 43: forming surface

45: Moul molding part 47: Rod receiving part

55: glass funnel 56: gather

57: ejecting rod 59: ejecting part

61: rod 63: support cylinder

67 spring member 69 coil spring member

71: pressurized cylinder

The above object is, according to the present invention, in the manufacturing apparatus of a glass funnel for a cathode ray tube having a plunger having a molded surface formed on the outside, and a bottom mold for receiving a glass gob and interacting with the plunger to form a glass funnel, the bottom portion In the mold, a mold forming part for forming a mold having an inclined inclination angle toward the rear end along the longitudinal axis of the glass funnel, and a rod receiving reduced in the radial direction and extending downward in the axial direction from the mold forming part. An addition is formed; Along the axial direction has an ejecting portion accommodated in the rod accommodating portion for forming the glass of the glass funnel cooperatively with the mold forming portion, and extending in the axial direction from the ejecting portion to be exposed to the outside An ejecting rod installed to be liftable; It is achieved by the apparatus for manufacturing a glass funnel for a cathode ray tube, characterized in that it comprises an elevating driving means for elevating the ejecting rod is installed outside the bottom mold.

Here, the elevating drive means preferably includes a support cylinder disposed below the ejecting rod along the axial direction to support the ejecting rod during the molding operation of the plunger.

The lifting driving means may include pressing means for pressing the lower end of the ejecting rod along the axial direction after the retraction of the plunger so that the formed funnel is spaced apart from the bottom mold, and the pressing means includes a cylinder mechanism. It is effective to be.

And, the lifting drive means preferably further comprises a withdrawing means for withdrawing the ejecting rod moved up by the pressing means.

The rod portion is provided with a stop projection protruding along the radial direction, the retraction means is composed of an elastic member interposed between the bottom mold and the stop jaw to apply an elastic force so that the stop jaw is spaced apart from the bottom mold. Is effective.

In addition, the retracting means is a magnetic member that is in contact with the ejecting rod and the magnetic force, the lifting shaft extending downward from the magnetic member in the axial direction along the circumferential direction, the lifting shaft and the lifting shaft and the relative movement It is preferable to include a female screw portion coupled to be possible, and a forward and backward driving means for forward and reverse rotation of the female screw portion.

Here, a tooth portion is formed on an outer diameter surface of the female screw portion, and the forward and reverse driving means includes a forward and reverse drive motor for forward and reverse rotation of the female screw portion having a tooth portion engaged with the tooth portion on a rotating shaft, and the forward and reverse drive motor is a servo. It is effective to be a motor.

The inclined angle of inclination has an angle range of 2 ~ 8 °, it is more preferred that the inclination angle has an angle range of 4 ~ 6 °.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

FIG. 5 is a cross-sectional view of a bottom mold of the apparatus for manufacturing a cathode ray tube glass funnel according to the present invention, and FIG. 6 is an enlarged view of a region of a glass funnel formed by the apparatus for manufacturing a cathode ray tube glass funnel of FIG. 5. As shown in these figures, a molding surface 43 is formed inside the bottom mold 41 so as to shape the appearance of the glass funnel 55, and a glass funnel (in the lower region of the molding surface 43) is formed. The shaping | molding part 45 is formed so that the shawl 56 of 55 may be shape | molded.

The unit forming part 45 has a unit tilt angle R inward along the longitudinal axis, and the unit tilt angle R has a range of 2 to 8 °, and preferably has a range of 4 to 6 °. The lower side of the shaping | molding part 45 is provided with the rod accommodating part 47 reduced radially from the shaping | molding part 45 and extended along an axial direction. The rod accommodating part 47 extends along the axial direction from the ejecting part 59 and the ejecting part 59 for forming the mold 56 of the glass funnel 55 in cooperation with the molding part 45. An ejecting rod 57 having a rod portion 61 extending outwardly of the bottom mold 41 is provided to be movable up and down.

The lower side of the ejecting rod 57 is arranged to be elevated in the axial direction so that the tip of the ejecting portion 59 is maintained in the same line as the bottom surface of the unit forming part 45 when the plunger 51 is pressed. The support cylinder 63 which supports the lower end of the rod 57 is provided.

7 is an enlarged view illustrating main parts of the ejecting rod of FIG. 5, and FIG. 8 is a cross-sectional view taken along line 8′-VII of FIG. 7. As shown in these figures, the rod portion 61 of the ejecting rod 57 has a rod shape, and the outer surface is formed with a planar portion 65 cut along the axial direction and arranged in parallel with each other. A spring member 67 is coupled to the planar portion 65 to protrude along the radial direction of the rod portion 61. The spring member 67 has an annular shape in which one side is opened, and a flat portion 68 is formed inside the spring member 67 so as to be in flat contact with the flat portion 65.

Between the spring member 67 and the bottom mold 41 is provided a coil spring member 69 coupled so that the rod portion 61 passes along the axis. The coil spring member 69 elastically presses the spring member 67 with respect to the bottom mold 41 so that the ejecting portion 59 is withdrawn into the rod receiving portion 47.

Hereinafter, the operation of the apparatus for manufacturing a glass funnel for a cathode ray tube according to the present invention having such a configuration will be described with reference to FIGS. 9 to 11.

9 and 10 are views showing the loading and pressing state of the glass gob of the apparatus for manufacturing a glass funnel for the cathode ray tube of FIG. 5, respectively. As shown in these figures, in the first station, the glass gob 53 is loaded into the bottom mold 41 from glass melting, which is not shown, wherein the ejecting rod 57 is the elastic force of the coil spring member 69. The ejecting portion 59 is accommodated in the rod accommodating portion 47 by this. When the bottom mold 41 in which the glass gob 53 is accommodated reaches the third station, the support cylinder 63 provided to move up and down on the lower side of the turntable is raised to contact and press the lower end of the ejecting rod 57 to eject it. The tip region of the casting portion 59 is located on the same line as the bottom surface of the molding portion 45. Then, the plunger 51 is lowered to press the glass gob 53 to form the glass funnel 55, and the shaped glass funnel 55 passes through a series of cooling stations to reach the sixth station, which is a blowout station. do.

11 is a cross-sectional view of a take-out station of the apparatus for manufacturing a glass funnel of FIG. As shown, in the sixth and eighth stations of the apparatus for manufacturing a cathode ray tube glass funnel according to the present invention, a pressure cylinder 71 is installed to press the ejecting rod 57 along the axial direction. The pressure cylinder 71 installed in the sixth station presses the lower end of the rod portion 61 of the ejecting rod 57 so that the ejecting portion 59 presses the mold 56 of the formed glass funnel 55. .

The pressurized glass funnel 55 is spaced apart from the forming surface 43 of the bottom mold 41 and is taken out by a pickup member (not shown) and conveyed to a later process. The pressure cylinder (not shown) installed in the eighth station presses the ejecting rod 57 so that the glass funnel 55 can be manually removed when the glass funnel 55 fails to be taken out from the sixth station.

When the pressure cylinder 71 of the sixth and eighth stations is withdrawn, the ejecting rod 57 is withdrawn by the elastic force of the coil spring member 69 into the rod receiving portion 47.

12 is a cross-sectional view of an apparatus for manufacturing a glass funnel for a cathode ray tube according to another embodiment of the present invention. The same reference numerals are assigned to the same and equivalent parts as the embodiments described with reference to FIGS. 5 to 11. As shown, the eighth station of the apparatus for manufacturing a cathode ray tube glass funnel according to the present invention, the magnetic member 81 disposed below the rod portion 61 of the ejecting rod 57 in the axial direction, A lifting shaft 83 coupled to the lower side of the magnetic member 81 and having a male screw portion formed on an outer circumferential surface thereof, and a first gear 85 having a female screw portion formed therein to allow relative movement with the lifting shaft 83; A second gear 87, which is engaged with the first gear 85, is provided with a rotating shaft arranged horizontally in the axial direction of the shaft 83. Here, the magnetic member 81 is preferably composed of an electromagnet so as to interrupt the magnetic force.

The second gear 87 is connected with a servo motor 89 capable of forward and reverse rotation and integrally rotatable.

By such a configuration, when the bottom mold 41 passing through the sixth station reaches the eighth station, the servomotor 89 rotates in a direction in which the lifting shaft 83 moves upward. As the lifting shaft 83 moves upward, the magnetic member 81 presses the lower end of the rod portion 61 of the ejecting rod 57 so that the ejecting portion 59 is assembled from the rod accommodating portion 47. 45) to protrude into. At this time, when the extraction of the glass funnel 55 fails at the sixth station, the ejecting unit 59 presses the mold 56 of the glass funnel 55 so that the glass funnel 55 forms the bottom mold 41. Spaced apart from face 43.

Next, when the upward movement of the ejecting rod 57 is completed, a magnetic force is generated in the magnetic member 81 and magnetically contacts the lower end of the rod part 61 of the ejecting rod 57. At this time, the servo motor 89 is rotated so that the lifting shaft 81 descends, and the ejecting rod 57 in contact with the magnetic member 81 has the ejecting portion 59 positioned in the rod accommodating portion 47. As much as possible.

When the lowering of the ejecting rod 57 is completed, the magnetic force of the magnetic member 81 is lost and the ejecting lobe 57 is separated from the magnetic member 81. The servo motor 89 stops after the predetermined lowering so that the lifting shaft 83 does not come into contact with the rotating turntable.

As described above, according to the present invention, there is provided an apparatus for manufacturing a glass funnel for a cathode ray tube, which can relatively increase the inclination angle.

Claims (11)

In the apparatus for manufacturing a glass funnel for a cathode ray tube having a plunger having a molded surface formed on the outside, and a bottom mold for receiving a glass gob and interacting with the plunger to form a glass funnel, In the bottom mold, a mold forming part for forming a mold having an inclined inclination angle toward the rear end along the longitudinal axis of the glass funnel, and a radial reduction from the forming part and extending downward along the axial direction. A rod receiving portion is formed; Along the axial direction has an ejecting portion accommodated in the rod accommodating portion for forming the glass of the glass funnel cooperatively with the mold forming portion, and extending in the axial direction from the ejecting portion to be exposed to the outside An ejecting rod installed to be liftable; Apparatus for manufacturing a glass funnel for a cathode ray tube, characterized in that it comprises an elevating driving means for elevating the ejecting rod is installed outside the bottom mold. The method of claim 1, And the elevating driving means includes a support cylinder disposed below the ejecting rod along an axial direction to support the ejecting rod during the molding operation of the plunger. The method of claim 2, The elevating driving means includes a pressurizing means for pressing the lower end of the ejecting rod along the axial direction after the retraction of the plunger so that the formed funnel is spaced apart from the bottom mold. Device. The method of claim 3, The pressurizing means is a device for manufacturing a glass funnel for a cathode ray tube, characterized in that the cylinder mechanism. The method according to claim 3 or 4, The elevating driving means is a device for manufacturing a glass funnel for a cathode ray tube, characterized in that it further comprises a withdrawing means for withdrawing the ejecting rod moved up by the pressing means. The method of claim 5, The rod portion has a stopping jaw protruding along the radial direction, And the retracting means is an elastic member interposed between the bottom mold and the stop jaw to apply an elastic force to space the stop jaw from the bottom mold. The method of claim 5, The retracting means includes a magnetic member in contact with the ejecting rod by a magnetic force, an elevating shaft extending downward from the magnetic member in an axial direction and having a male screw portion in a circumferential direction, and capable of relative movement with the elevating shaft. An apparatus for manufacturing a glass funnel for a cathode ray tube, characterized in that it comprises a female screw portion to be coupled, and a forward and reverse driving means for forward and reverse rotation of the female screw portion. The method of claim 7, wherein A tooth portion is formed on an outer diameter surface of the female screw portion, and the forward and reverse driving means has a tooth portion engaged with the tooth portion on a rotating shaft, and includes a forward and backward driving motor for forward and reverse rotation of the female screw portion. Manufacturing equipment. The method of claim 8, The forward and reverse drive motor is a manufacturing apparatus of a glass funnel for a cathode ray tube, characterized in that the servo motor. The method of claim 1, The unit tilt angle is the manufacturing apparatus of the glass funnel for cathode ray tube, characterized in that it has an angle range of 2 ~ 8. The method of claim 10, The unit tilt angle is the manufacturing apparatus of the glass funnel for cathode ray tube, characterized in that it has an angle range of 4 ~ 6.