KR20100026620A - Belt type edge polishing apparatus for flat glass - Google Patents

Abstract

PURPOSE: A belt type edge polishing device for a flat glass is provided to process a edge surface to a desired shape by applying appropriate pressure to the edge surface using a support plate. CONSTITUTION: A belt type edge polishing device for a flat glass(100) comprises a first base roller(10), a second base roller(50), a support plate(60), and auxiliary rollers(20). The first base roller winds a belt(30) for polishing. The second base roller winds the belt which completes polishing. The support plate supports the belt contacted with the flat glass. The auxiliary rollers are located between the first base roller and the second base roller, and guide the belt.

Description

Belt type edge polishing device for flat glass {BELT TYPE EDGE POLISHING APPARATUS FOR FLAT GLASS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt type edge polishing apparatus for flat glass, and more particularly, to a belt type edge polishing apparatus for flat glass that can be polished while applying a predetermined pressure to a cut surface of a cut glass using a support plate. .

Generally, the cutting and chamfering processes of flat panel display glass substrates include a mechanical cutting method and a non-contact cutting method using a laser.

The dual mechanical cutting method is that the diamond or carbide notching wheels are dragged across the glass surface so that the scale is mechanically inscribed on the glass plate and then the glass plate is bent along the scale to be cut to create the cutting edge. Typically, mechanical cutting methods produce lateral cracks of about 100 to 150 μm deep, which lateral cracks arise from the cutting line of the eye wheel. These lateral cracks reduce the strength of the glass substrate and must be removed by grinding the sharp edges of the glass substrate.

The non-contact cutting method using a laser expands the glass surface as the laser moves along a predetermined path on the glass surface through a check stamped on the edge of the glass substrate, and then moves the cooler along with it to tension the surface to advance the laser. The glass substrate is cut by thermally propagating the cracks along the path. The first advantage of the laser cutting method is that the cut glass substrate edge is formed into the edge surface of the mirror surface, so that less dust is generated than the mechanical cutting, and the size deviation of the cut glass substrate is straight and square. The second advantage is that the lateral cracking that occurs in the case of mechanical cutting can be greatly reduced, thereby increasing the strength and quality of the glass substrate edge.

Sharp edges are generated in the cutout portion of the glass substrate cut by the mechanical or laser as described above. These sharp edges are susceptible to external impact and have a problem of inhomogeneous quality. Therefore, these sharp edges must be chamfered through a grinding or polishing process.

In the conventional method of polishing a substrate glass, grinding is performed in an R-edge shape in which the entire cut edge surface is processed into a round shape, and then a similar polishing wheel is rotated to improve the roughness level of the edge surface. It is common to perform polishing. When polishing is performed in this manner, there is a limit to lowering the roughness level of the polished edge surface, and such roughness level causes a large amount of particles (foreign matter) having a roughness level and a size smaller between the rough surfaces. do. In addition, complex mechanism configuration is required to rotate the polishing wheel, and equipment consumption is high and noise is generated to satisfy high rotational force. Furthermore, the particles generated by the friction between the wheel and the glass edge are scattered, which worsens the working environment and degrades the glass quality.

The present invention is to solve the above problems, a belt for applying an abrasive on the belt, using a film belt that can ensure the level of roughness of the edge surface according to the component of the abrasive to polish the edge surface of the glass substrate It is an object to provide a type edge polishing apparatus.

In particular, in the belt type edge polishing apparatus of the present invention, by adding a support plate, it is possible to provide a desired pressure on the edge surface of the glass substrate, thereby enabling various types of edge surface polishing.

The above object of the present invention is a flat glass polishing apparatus for polishing flat glass, comprising: a first basic roller 10 wound around a polishing belt 30, and a second basic roller wound around a belt 30 having finished polishing. 50, a plurality of auxiliary rollers 20 for guiding the belt 30 and maintaining tension between the first basic roller 10 and the second basic roller 50, and a belt in contact with the flat glass ( 30) is achieved by a flat glass polishing apparatus comprising a support plate 60 for supporting a portion and a pressurizing device 70 for applying pressure to the support plate 60.

Preferably, further comprising a case for supporting the first basic roller 10, the second basic roller 50, the auxiliary roller 20, and the pressing device 70, and the edge surface of the flat glass The contact surface of the case is preferably formed as an open surface.

In addition, it is further provided with a horizontal moving device for moving the case horizontally so that the polishing device can easily access the polishing surface of the glass, and the glass conveying device 90 for moving the plate in the horizontal direction by vacuum suction Thus, the polishing can be performed smoothly.

Preferably, the polishing apparatus of the present invention further includes a cleaning nozzle 120 for cleaning the particles and the film generated by the polishing, and water sprayed from the cleaning nozzle 120 is sprayed from the center portion of the flat glass to the edge portion. It is preferable.

The support plate may be formed of a single material having a lower hardness than the flat glass, but preferably, the support plate is a surface (front surface) in contact with the edge surface of the flat glass on the body 61 formed of the first hardness material. It is preferable that the pad layer 65 is formed of the second hardness material lower than the rigid body on the entire surface of the center portion to form the groove portion 63, leaving only a predetermined thickness from the upper and lower surfaces. At this time, the height of the groove portion 63 should be configured to be larger than the thickness of the flat glass to uniformly polish the entire edge surface, the second hardness material is preferably used as silicone polyurethane.

In the belt type edge polishing apparatus for flat glass according to the present invention, it is possible to easily secure the desired level of roughness by changing the abrasive applied to the film belt. This allows the edge surface to be machined to the desired shape.

In addition, by using the belt-type edge polishing apparatus for flat glass according to the present invention, particles are not present between the rough surfaces of the edges at the roughness level of the mirror surface, and the belt-type edge polishing apparatus uses only the linear motion by the X and Y axes. This can be achieved by simplifying the mechanism and generating less noise. Furthermore, when the belt type edge polishing apparatus for flat glass according to the present invention is used, particles generated at the edge surface are distributed within 30 mm of surroundings, which is advantageous in removing particles.

Hereinafter, with reference to the accompanying drawings, the specific content for the practice of the present invention will be described in detail.

1 and 2 are a perspective view and a cross-sectional view of a belt type edge polishing apparatus for flat glass according to an embodiment of the present invention. The belt type edge polishing apparatus for flat glass according to the present invention includes a first basic roller 10 winding the polishing belt, a second basic roller 50 winding the polishing belt, and a first basic roller 10; A plurality of auxiliary rollers 20 for guiding the belts between the second basic rollers 50 and maintaining the tension of the belts, a support plate 60 and a support plate 60 which are installed on the surface which is in contact with the edge surface of the glass and the belt. Pressurizing device 70 for pressurizing the), the cleaning nozzle 120 for cleaning the particles and film generated by the polishing and the case 80 for supporting these components. In FIG. 1, the configuration of the pressing device is omitted.

The first basic roller 10 is a roller to which the tension adjusting device is attached to maintain a constant tension when the belt is released from the first basic roller 10. Since the tension adjusting device is a general purpose device such as used for a VCR video tape roller, detailed description thereof will be omitted. The second basic roller 50 is driven by a step motor, and is used for winding and storing a film belt on which polishing is completed at a constant speed. The belt wound on the first basic roller 10 while the step motor of the second basic roller 50 is rotated at a constant speed in order to polish the edge surface of the flat glass using the belt and then prepare the polishing of the next flat glass. 30 is released at a constant speed and is operated in such a way that it is wound on the second basic roller 50.

A plurality of auxiliary rollers 20-1, 20-2, 20-3, 20-4, 20-5, and 20-6 are disposed between the first basic roller 10 and the second basic roller 50 to belt As a roller for guiding the 30 and maintaining a proper tension of the belt 30, it is not connected to a separate drive device. In the present invention, a plurality of auxiliary rollers 20-1, 20-2, 20-3, 20-4, 20-5, and 20-6 are collectively referred to as auxiliary rollers 20.

The support plate 60 is a plate for pressing the belt 30 to the flat glass edge surface in a direction opposite to the surface where the belt 30 and the edge glass of the flat glass touch, and the pressing device 70 is the support plate 60. As an apparatus for applying a constant pressure to the pressure, a constant pressure cylinder may be used as an example.

The cleaning nozzle 120 is a nozzle for spraying water to remove particles and film remaining on the flat glass 100 after polishing is completed, and the direction of the nozzle in the direction from the center to the edge of the flat glass is changed. To be set.

The case 80 includes a first basic roller 10, a second basic roller 50, and a plurality of auxiliary rollers 20-1, 20-2, 20-3, 20-4, 20-5, and 20-6. In addition, the cleaning nozzle 120 and the pressurizing device 70 have a function of supporting the installation in a predetermined position, and at least a portion of the belt 30 pressed by the support plate 60 has an open surface form.

Figure 3 is an embodiment of a belt-type edge polishing apparatus for flat glass according to the present invention with a horizontal moving device attached to the case bottom. On the left side is provided a glass transfer device 90 for moving the plate glass 100 to the front of the drawing while vacuum adsorption using the vacuum adsorber 91, and on the right side is a flat glass belt with a horizontal moving device 110 attached thereto. Type edge polishing apparatus is provided. An example of the horizontal moving device 110 may use a linear guide.

Hereinafter, the polishing operation of the flat glass of the present invention will be described with reference to FIGS. 1 to 3. When the flat glass 100 is conveyed by the glass conveying apparatus 90, the belt 30 contacts the edge surface of the flat glass 100 while the horizontal moving device 110 moves to the left side of FIG. 3. At this time, the support plate 60 connected to the pressing device 70 pushes the belt 30 to the edge surface of the flat glass 100 at an appropriate pressure, and the belt is fixed without rotation. Since the abrasive is applied in the form of a film on the belt 30 in contact with the edge of the flat glass 100, the polishing level of the edge can be easily adjusted according to the abrasive used.

The pressure for pressing the belt 30 to the edge surface of the flat glass by the support plate 60 depends on the tension of the belt 30, the pressure applied to the pressing device 70, and the material of the support plate 60. In general, the contact area between the plate glass 100 and the belt 30 is in proportion to the pressure transmitted to the belt 30 by the support plate 60. The tension (tension) of the belt 30 was maintained at 3 N · m so as to give a sufficient margin in contact with the support plate 60, the moving distance of the horizontal moving device 60 is 3mm, the pressing device 70 is 400 Maintained at MPa.

The flat glass 100 is transferred to the front of FIG. 3 by the glass transfer device 90, and the edge surface of the flat glass 100 is polished by the frictional action of the abrasive applied to the surface of the belt 30. When completely passed, the step motor (not shown) is operated to wind the belt 30 wound around the first basic roller 10 with the second basic roller 50 to prepare polishing of the plate glass 100 to be transferred next. Done.

Particles and film particles generated when using the flat glass polishing apparatus according to the present invention are buried in the edge surface of the flat glass. The flat glass polishing apparatus according to the present invention does not require high momentum on the processing method, so that particles and film particles are not scattered over a long distance. Therefore, by using the flat glass polishing apparatus according to the present invention can also reduce the polishing roughness level to 0.1㎛ level, it is possible to significantly reduce the size and number of particles.

FIG. 4 is a configuration diagram of a support plate used in the flat glass polishing apparatus of the present invention, and FIG. 5 illustrates pressure applied to the edge surface of the flat glass when the support plate of FIG. 4 is used. The support plate 60 used in FIG. 4 is an example composed entirely of silicone polyurethane. When the support plate of FIG. 4 is used, polishing is performed, but as shown in FIG. 5, the polishing pressure is concentrated at the middle portion of the edge surface of the flat glass, and the polishing pressure decreases as the distance from the center is reduced. . Therefore, it can be seen that the edge surface close to the surface distant from the center portion is insufficiently polished properly.

FIG. 6 is a perspective view of a support plate of another embodiment used in the flat glass polishing apparatus of the present invention, FIG. 7 is a side view illustrating a shape in which polishing takes place using the support plate of FIG. 6, and FIG. 8 is of FIG. 6. The pressure applied to the plate glass edge when using the support plate is shown.

In the support plate 60 used in FIG. 6, a surface of the body portion 61 formed of a rigid body having a first hardness material, which is in contact with the edge surface of the flat glass (hereinafter referred to as “front surface”), has a predetermined thickness. A pad layer having a groove portion 63 formed in a direction in which the edge surface of the flat glass 100 passes through the entire portion of the center portion, leaving only the lower surface and the lower surface thereof. 65). The pad layer 65 is usually formed of silicone polyurethane.

The height of the groove portion 63 should be greater than the thickness of the flat glass 100 so that a relatively uniform pressure is applied to the edge surface of the flat glass 100. In the case of using the support plate 60 of FIG. 6, an edge portion of the flat glass is inserted into the groove portion 63 formed on the front surface of the support plate 60 during polishing, thereby increasing the polishing area. This phenomenon can be seen in FIG. 8, which shows the pressure applied to the flat glass during polishing. When the support plate of FIG. 4 is used, pressure is concentrated in the center of the polishing surface as shown in the graph 150 of FIG. 8, whereas when the support plate of FIG. 6 is used, the graph 160 of FIG. 6 is used. It can be seen that the polishing pressure is uniformly distributed on the edge surface of the flat glass as shown in FIG.

Although specific embodiments of the present invention have been described and illustrated above, it will be apparent that various modifications may be made by those skilled in the art without departing from the technical spirit of the present invention. Such modified embodiments should not be understood individually from the spirit and scope of the present invention, but should fall within the claims appended to the present invention.

1 is a perspective view of a belt type edge polishing apparatus for flat glass according to an embodiment of the present invention.

2 is a cross-sectional view of a belt type edge polishing apparatus for flat glass according to an embodiment of the present invention.

Figure 3 is an embodiment of a belt-type edge polishing apparatus for flat glass according to the present invention with a horizontal moving device attached to the case bottom.

4 is a configuration diagram of a support plate used in the flat glass polishing apparatus of the present invention.

FIG. 5 shows the pressure exerted on the edge surface of the plate glass when using the support plate of FIG. 4. FIG.

6 is a perspective view of a support plate of another embodiment for use in the flat glass polishing apparatus of the present invention.

FIG. 7 is a side view illustrating a shape in which polishing occurs using the support plate of FIG. 6. FIG.

8 shows the pressure applied to the flat glass edge surface when using the support plate of FIG. 6.

***** Brief description of the main symbols on the drawings *****

10: first primary roller 20: auxiliary roller

30: belt 50: second base roller

60: support plate 70: pressurization device

100: flat glass 110: horizontal shifting device

120: cleaning nozzle

Claims (8)

A flat glass polishing apparatus for polishing a flat glass, A first basic roller 10 wound around the polishing belt 30; A second basic roller 50 winding the belt 30 after the polishing is performed; And And a support plate (60) for supporting a portion of the belt (30) in contact with the flat glass. The flat glass polishing apparatus of claim 1, wherein the flat glass polishing apparatus includes: A plurality of auxiliary rollers 20 for guiding the belt 30 and maintaining tension between the first basic roller 10 and the second basic roller 50; And Flat glass polishing apparatus, characterized in that further provided with a pressing device for applying pressure to the support plate (60). The method according to claim 1 or 2, A horizontal moving device 110 for horizontally moving the first basic roller 10, the second basic roller 50, the auxiliary roller 20, and the pressing device 70 is further provided. Flat glass polishing apparatus. The method of claim 3, wherein And a glass transfer device (90) for vacuum suction of the flat glass to move in the horizontal direction. The method of claim 1, Flat glass polishing apparatus, characterized in that the cleaning nozzle 120 is further provided for cleaning the particles generated due to the polishing. The method of claim 1, And the support plate is formed of silicone polyurethane having a lower hardness than the flat glass. The method of claim 1, The support plate is a body (61) formed of a first hardness material in contact with the edge surface of the flat glass (front surface) leaving only a certain thickness from the upper surface and the lower surface of the flat glass 100 The groove portion 63 is formed in the entire direction through which the edge surface passes, and the pad layer 65 is formed on the front surface of the second hardness material than the rigid body, and the first hardness has a value greater than the second hardness. Flat glass polishing apparatus. The method of claim 7, wherein The height of the groove portion 63 is larger than the thickness of the flat glass, flat glass polishing apparatus.

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