KR20020091574A - Sandblasting system for making stipple mold for cathode ray tube - Google Patents

Abstract

PURPOSE: A stipple forming sand blasting system of a mold for shaping a cathode ray tube is provided to form a uniform stipple on an outer surface of the mold regardless of a size and a shape of mold by injecting uniformly materials. CONSTITUTION: A workroom(12) having an entrance(14) is formed in a rectangular booth(10). A couple of guide rails(16) are installed on a bottom of workroom(12). A transparent window is installed on a sidewall of the booth(10). A sand blasting system has a mold support table(20). The mold support table(20) is moved on the guide rail(16). A roller(22) is installed at a bottom of the mold support table(20). The sand blasting system has a multi-joint robot(30). The multi-joint robot(30) is formed with a body(32), the first arm(34), the second arm(36), and a wrist(38). The body(32) is supported by a support column(30a). The first arm(34), the second arm(36), and the wrist(38) are extended to the workroom(12). A nozzle(40) is installed at the wrist(38). The nozzle(40) is connected to a compressor through a connection tube(42). The sand blasting system has a numerical input portion(50) and a controller(60) in order to control the multi-joint robot(30). The numerical input portion(50) can be formed with a keyboard(52). The controller(60) can be formed with a micro computer.

Description

SANDBLASTING SYSTEM FOR MAKING STIPPLE MOLD FOR CATHODE RAY TUBE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand blasting system for forming a stipple in a mold for forming a cathode ray tube, and more particularly, to a uniform roughness on the outer surface of a mold regardless of the size and shape of the mold. It relates to a stippling sandblasting system of a mold for forming a cathode ray tube to enable a platter to be formed.

Glass Blub for Cathode Ray Tube consists of a panel through which an image is projected, a conical funnel joined to the back of the panel, and a tubular neck fused to the vertex of the channel. These panels, channels and necks are all made of glass. In particular, panels and channels are produced by press molding a molten glass mass called a gob to a desired size and shape. That is, a panel and a channel are manufactured by injecting a molten glass mass called a product between the upper mold and the lower mold of the press molding apparatus, and pressing the upper mold and the lower mold together.

On the other hand, since the panel and the chanel is completed, various coating treatments should be carried out, so that the outer surface of the panel and the channel should be rough so that the coating agent can be easily adhered. Therefore, in the process of forming the panel and the channel, it is necessary to form a stipple on the mold surface of the mold for forming the panel and the channel so that the fine irregularities are formed on the outer surface of the panel and the channel. This stiffener is usually formed by sand or small diameter steel balls sprayed onto the mold surface of the mold using a sand blasting system.

1 is a view schematically showing a configuration of a sand blasting system, and looks at a method of forming a stifle in a mold for forming a panel through this. First, the sand blasting system includes a rotary table 1 on which a mold M can be placed, and a guide rail 3 is installed on one side of the rotary table 1. The guide rails 3 are bent at both ends to have a curvature similar to that of the mold surface M1 of the panel forming mold M. As shown in FIG. And the slider (5) is installed on the guide rail (3) to be movable, the end of the slider (5) is provided with a nozzle (7) for injecting sand or steel balls (hereinafter referred to as "injection material") do. The nozzle 7 is, of course, connected to a compressor (not shown) through the connecting pipe 9.

The stirred sandblasting system having such a configuration rotates the mold M slowly using the rotary table 1 and simultaneously moves the nozzle 7 using the slider 5 while the mold 7 moves through the mold 7. Sand or steel balls are sprayed on the mold surface M1 of (M).

However, such a conventional sand blasting system has a problem in that it is impossible to form a stifle having a uniform roughness on the mold surface of the mold depending on the size and shape of the mold.

That is, the size and shape of the mold (M) is different depending on the size and type of the panel and channel for the cathode ray tube to be molded, and the injection position of the injection material for forming the stipples should also vary according to the size and shape of the mold. . However, in the conventional sand blasting system, regardless of the size and shape of the mold M, since the nozzle 7 for injecting the sprayed material is always transported at a constant path and at a constant speed, each mold having a different size and a different shape ( The spraying material cannot be evenly sprayed on the mold surface M1 of M). As a result, a mold having non-uniform roughness scattering is formed on the mold surface M1 of the mold M, and a mold having non-uniform roughness is formed on the mold surface M1. Non-uniform fine irregularities are formed in the panel manufactured by). On the other hand, if non-uniform fine irregularities are formed in the panel, the thickness of the coating applied to the panel is not uniform, which causes the mass production of defective products.

Accordingly, the present invention has been made to solve the problems described above, the object of which is to spray the spraying material evenly to form a stifle having a uniform roughness on the outer surface of the mold regardless of the size and shape of the mold The present invention provides a sandblasting system for forming a stifle of a mold for forming a cathode ray tube.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the configuration of a stifle-forming sand blasting system of a conventional cathode ray tube molding die;

Figure 2 is a side cross-sectional view schematically showing the configuration of the stifle-forming sand blasting system of the cathode ray tube molding die according to the present invention;

3 is a cross-sectional view taken along the line A-A of FIG.

♣ Explanation of symbols for the main parts of the drawing ♣

10: booth 12: workroom

14: entrance 16: guide rail

20: mold support table 30: articulated robot

32: body 34: first arm

36: second arm 38: list

40: nozzle 50: input unit

60: controller

In order to achieve the above object, the present invention provides a sand blasting system for injecting sand or steel balls into the mold for forming a stipple in the cathode ray tube molding mold, the booth having a work chamber having an inlet; Rails are installed side by side on the bottom surface of the work room of the booth, extending to the outside of the booth through the entrance of the work room; A mold support table installed to be accessible from the workroom of the booth along the rail; A multi-joint robot having a nozzle for injecting sand or steel balls into a mold disposed on the mold support table, the linear joint being able to move, rotate, and rotate to move the nozzle along an outer surface of the mold; A numerical input unit capable of inputting coordinate values of the linear motion, the pivoting position, and the rotational position of the articulated robot so as to adjust a movement path and a movement speed of the nozzle; And a controller for processing a signal input from the numerical input unit and linearly, turning, and rotating the joint robot according to the processed value.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a stifle forming sand blasting system of a cathode ray tube molding die according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a side cross-sectional view schematically showing the configuration of the stifle forming sandblasting system of the cathode ray tube molding die according to the present invention, Figure 3 is a cross-sectional view taken along line A-A of FIG. First, the sand blasting system of the present invention has a square booth 10, and a work room 12 having an inlet 14 is formed in the booth 10. And a pair of guide rails 16 are installed side by side on the bottom surface of the work room 12 of the booth 10, the pair of guide rails 16 from the work room 12 of the booth 10 from the work room ( It extends outward through the inlet 14 of 12). In addition, the transparent window 18 is installed on the sidewall of the booth 10 to check the interior of the work room 12 as shown in FIG. 3.

And the sand blasting system of the present invention includes a mold support table 20. The mold support table 20 is configured to place a cathode ray tube molding die M, and is installed to be movable on the guide rail 16. The mold support table 20 is configured to move in and out of the workroom 12 entrance 14 of the booth 10 while moving along the guide rail 16 to move the heavy mold into the workroom 12 of the booth 10. Play a role. Here, the roller 22 is installed on the bottom surface of the mold support table 20 so that the mold support table 20 can smoothly move the upper surface of the guide rail 16.

And the sand blasting system of the present invention includes a multi-joint robot (30). The articulated robot (30) is a selectively assembled compliant assembly robot arm (articularly robotic) articulated robot having a rotating joint that is parallel to the body (32), which is rotatably installed about a vertical axis on the body (32). The second arm 36 and the second arm 36 are rotatably installed on the first arm 34 and the first arm 34 so as to be rotatable about a vertical axis. It consists of a wrist (wrist: 38) is installed to be able to move horizontally. Here, the body 32 is configured to be supported on the ground by the support pillar 30a, the first arm 34, the second arm 36 and the wrist 38 to the work room 12 of the booth 10 It is configured to extend, and the wrist 38 is configured to be placed on top of the mold M placed on the mold support table 20. The articulated robot 30 is orientated as the first arm 34 and the second arm 36 move in a plane, and the wrist 38 moves horizontally and vertically along the second arm 36. The nozzle 40, which will be described later, is moved along the upper part of the mold M by performing so-called direct motion, turning, and rotational motion. Since the Scara type articulated robot 30 is already well known, a description thereof will be omitted. In the present invention, the articulated robot 30 is configured as a scara type, but is not limited thereto. For example, a Cartesian coordinate robot or a cylindrical coordinate robot may be used.

On the other hand, the nozzle 40 is installed in the wrist 38 of the scalar joint robot 30. The nozzle 40 sprays sand or steel balls onto the mold surface M1 of the mold M. Through 42 is connected to a compressor (not shown). The nozzle 40 moves along the upper part of the mold M according to the movement of the first arm 34, the second arm 36, and the wrist 38 of the scara articulated robot 30, and the mold M Sand or steel balls are uniformly sprayed on the mold surface M1 of the mold).

And the sand blasting system of the present invention has a numerical input unit 50 and a controller 60 for controlling the joint robot 30. Numerical input section 50 is a linear robot, in detail, the first robot 34, the second arm 36 of the articulation robot 30 and the arm 38 and the direct movement at the set speed at the set position 38, Allows the numerical value of the movement to be entered so that it can be rotated. The numerical input unit 50 may be implemented by a computer keyboard 52. Here, the numerical value is a three-dimensional coordinate system x, y, z and the x-axis, y-axis, z so that the first arm 34, the second arm 36, and the list 38 can move, rotate, and rotate, respectively. It is input in the coordinate system α, β, and γ which are rotation amounts about the axis. Since the coordinate system of the articulated robot 30 and its operation are already known, a detailed description thereof will be omitted.

The controller 60 processes a signal input from the numerical input unit 50 and controls the first arm 34, the second arm 36, and the list 38 of the joint robot 30 according to the processed value. It plays a role. Such a controller 60 may be implemented as a microcomputer. Here, the controller 60 may be separately configured as shown in the drawing, but may be embedded in the computer main body. When the controller 60 is configured separately, the controller 60 is connected to the computer main body 52 through an interface device as shown in the drawing.

As a result, the joint robot 30 can be driven, rotated, and rotated at a set speed at the set position by the numerical input unit 50 and the controller 60 having such a configuration. Irrespective of the size and shape of the nozzle, the nozzle 40 uniformly sprays sand or steel balls onto the mold surface M1 of the mold M while moving the mounted nozzle evenly along the mold surface M1 of the mold M. To do it.

As described above, the sandblasting system for forming a slit of the cathode ray tube molding die may be controlled according to the size and shape of the mold M by using the joint robot 30. Irrespective of the size and shape of the mold, sand or steel balls can be uniformly sprayed onto the mold surface M1 of the mold M, and therefore uniform roughness is applied to the mold surface M1 of the mold M. Allows the formation of a stifle with

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, the mold forming sand blasting system of the cathode ray tube molding die according to the present invention uses a joint robot to adjust the moving path and the moving speed of the nozzle according to the size and shape of the mold. And sand or steel balls may be uniformly sprayed on the mold surface of the mold regardless of the shape of the mold, and thus a stipple having a uniform roughness may be formed on the mold surface of the mold.

Claims (2)

In the sand blasting system for injecting sand or steel balls in the mold for forming a stipple on the mold for cathode ray tube forming, A booth having a work room having an entrance; Rails are installed side by side on the bottom surface of the work room of the booth, extending to the outside of the booth through the entrance of the work room; A mold support table installed to be accessible from the workroom of the booth along the rail; A multi-joint robot having a nozzle for injecting sand or steel balls into a mold disposed on the mold support table, and capable of linear motion, rotation, and rotational movement to move the nozzle along an outer surface of the mold; A numerical input unit capable of inputting coordinate values of the linear motion, the pivoting position, and the rotational position of the articulated robot so as to adjust a movement path and a movement speed of the nozzle; And a controller configured to process a signal input from the numerical input unit and to linearly, pivot and rotate the joint robot according to the processed value. 2. The articulated robot according to claim 1, wherein the articulated robot has a body, a first arm rotatably installed about the vertical axis on the body, and a second arm rotatably installed on the first arm about the vertical axis. And a list of nozzles installed vertically and horizontally on the second arm so as to be horizontally movable.