KR20170032928A - Apparatus for Grinding Side Edge of Thin Glass Cover - Google Patents

Apparatus for Grinding Side Edge of Thin Glass Cover Download PDF

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Publication number
KR20170032928A
KR20170032928A KR1020150130303A KR20150130303A KR20170032928A KR 20170032928 A KR20170032928 A KR 20170032928A KR 1020150130303 A KR1020150130303 A KR 1020150130303A KR 20150130303 A KR20150130303 A KR 20150130303A KR 20170032928 A KR20170032928 A KR 20170032928A
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KR
South Korea
Prior art keywords
cover glass
thin cover
abrasive tape
side edge
tape
Prior art date
Application number
KR1020150130303A
Other languages
Korean (ko)
Inventor
이정우
강동성
김기천
Original Assignee
(주)위시스
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Publication date
Application filed by (주)위시스 filed Critical (주)위시스
Priority to KR1020150130303A priority Critical patent/KR20170032928A/en
Publication of KR20170032928A publication Critical patent/KR20170032928A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • B24B21/08—Pressure shoes; Pressure members, e.g. backing belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories

Abstract

The present invention relates to a side edge polishing apparatus for a thin cover glass capable of precisely polishing a side edge of a thin thin cover glass using an abrasive tape. A side edge polishing apparatus for a thin cover glass according to the present invention comprises: a fixing unit for fixing a thin cover glass; and a fixing unit for fixing the thin cover glass to a belt-shaped material for polishing a side edge of the thin cover glass, An abrasive tape formed by attaching an abrasive material, an unwinder wound around the abrasive tape, a rewinder for rewinding the abrasive tape released from the unwinder, and a transfer path for the abrasive tape unwound from the unwinder and rewound to the rewinder And a pressing mechanism for moving the pressing member forward and backward to adjust the pressing force of the polishing tape with respect to the side edge of the thin cover glass.

Figure P1020150130303

Description

Technical Field [0001] The present invention relates to a side edge polishing apparatus for a thin cover glass,

The present invention relates to a side edge polishing apparatus for a thin cover glass, and more particularly to a side edge polishing apparatus for a thin cover glass which can precisely polish the side edge of a thin thin cover glass using an abrasive tape.

A thin cover glass made of a tempered glass is used as an electronic device having a display such as a mobile device. The thin cover glass used in mobile devices is cut to a predetermined size and then used to polish the side. The side surface of the thin cover glass cut from the base material glass plate has a very high surface roughness.

If the side surface of the thin cover glass is not smooth, there arises a problem of safety and durability. If the side surface of the thin cover glass is not smooth and sharp, there is a problem that the user may be injured during use. Further, when the side surface of the thin cover glass is not smooth, the thin cover glass is damaged even in a small impact. That is, when the outer surface of the thin cover glass having a high brittleness such as tempered glass has a high surface roughness and sharpness, cracks are likely to be generated even in a small impact.

Because of such a problem, the thin cover glass is subjected to a process of polishing the edge side of the thinner cover glass with a polishing apparatus to smooth the surface. Conventionally, a thin cover glass is polished using a rotating polishing tool. Particularly, in the case of a thin cover glass used in a display device of a mobile device, it is necessary to process and polish the precise dimensions of the cover glass. In many cases, the final polishing process is performed manually by a person using an abrasive tool. In this case, the result of the polishing process is not constant and it is difficult to polish the wafer with the correct dimensions.

In addition, when a rotating abrasive tool is used, particles generated during the abrasion process collide with the surface of the thin cover glass to damage the surface. The roughness of the polishing tool is also changed during the polishing process, so that the time and degree of performing the polishing operation vary depending on the state of the tool. In addition, a hard polishing tool such as a polishing disk or a polishing wheel is liable to be adhered or worn to the surface of the polishing tool during polishing, so that it is necessary to dress it after a certain period of time or to replace it with another one.

On the other hand, chamfering the side edge of the thin cover glass to a predetermined shape instead of merely polishing the side surface and the side edge of the thin cover glass may improve the strength of the thin cover glass. In this case, the side edge of the thin cover glass must be chamfered in a standardized shape. However, there is a problem that it is difficult to control the shape of the chamfer of the side edge in the polishing apparatus using the conventional polishing tool.

Patent Registration No. 1025263 (Mar. 29, 2011) Published Patent Application No. 2008-0013746 (Feb. Patent Publication No. 2013-0114955 (Mar. 10, 2013)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a method of polishing a side edge of a thin cover glass by using an abrasive tape having uniform surface roughness, It is an object of the present invention to provide a side edge polishing apparatus for a thin cover glass.

According to an aspect of the present invention, there is provided a side edge polishing apparatus for a thin cover glass, including: a fixing unit for fixing a thin cover glass; An abrasive tape having an abrasive material attached to a belt-like material to abrade the side edge of the thin cover glass in contact with the thin cover glass fixed to the fixed unit; An unwinder for winding the abrasive tape around; A rewinder for rewinding the abrasive tape released from the unwinder; A pressing member which is disposed on the conveying path of the abrasive tape to be unwound from the unwinder and rewinds to the rewinder to press the abrasive tape to the side edge of the thin cover glass; And a pressing mechanism for moving the pressing member in and out to adjust the pressing force of the polishing tape with respect to the side edge of the thin cover glass.

The side edge polishing apparatus of the thin cover glass according to the present invention has an advantage that the polishing operation of the thin cover glass can be performed accurately and quickly.

Further, in the side edge polishing apparatus of the thin cover glass according to the present invention, since the polishing tape is continuously released from the unwinder and rewound to the rewinder during the polishing operation, the abrasive particles generated during the polishing operation and the new polishing tape There is an advantage that the polishing work for the thin cover glass can be continued.

Further, the side edge polishing apparatus of the thin cover glass according to the present invention has an effect of uniformly maintaining the polishing quality for the thin cover glass.

1 is a side view showing a side edge polishing apparatus of a thin cover glass according to an embodiment of the present invention.
FIGS. 2 to 4 are perspective views illustrating a partial configuration of a side edge polishing apparatus of a thin cover glass according to an embodiment of the present invention.
5 is a plan view showing a polishing unit of a side edge polishing apparatus of a thin cover glass according to an embodiment of the present invention.
6 is a perspective view in which a part of the polishing unit of the side edge polishing apparatus of the thin cover glass according to the embodiment of the present invention is exploded.
7 is a view for explaining a process of polishing a side edge of a thin cover glass with a side edge polishing apparatus of a thin cover glass according to an embodiment of the present invention.

Hereinafter, a side edge polishing apparatus for a thin cover glass according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing a side edge polishing apparatus of a thin cover glass according to an embodiment of the present invention, and FIGS. 2 to 4 show a partial configuration of a side edge polishing apparatus for a thin cover glass according to an embodiment of the present invention. 5 is a plan view showing a polishing unit of a side edge polishing apparatus for a thin cover glass according to an embodiment of the present invention. FIG. 6 is a side view of a side edge polishing apparatus for polishing a side edge of a thin cover glass according to an embodiment of the present invention. Fig. 2 is a perspective view showing a part of the polishing unit of Fig.

1 to 6, a side edge polishing apparatus 100 for a thin cover glass according to an embodiment of the present invention includes a polishing unit 101, a supporting unit 102, a fixing unit 103, A transfer unit 104, and a control unit 105. [ The support unit 102 supports the polishing unit 101 and the control unit 105 controls the operation of the polishing unit 101 and the support unit 102 and the fixed unit 103 and the overall operation of the apparatus. The side edge polishing apparatus 100 of the thin cover glass according to the present embodiment can precisely polish the side edge of the thin cover glass 10 by using the polishing tape 113.

The polishing unit 101 includes a support frame 107, a polishing tape 113, an unwinder 114, a rewinder 115, a pressing member 135 and a vibration unit 145. The polishing unit 101 polishes the side edge of the thin cover glass 10 fixed to the fixed unit 103 with the polishing tape 113 while conveying the polishing tape 113 along a predetermined conveying path. The support frame 107 supports the unwinder 114, the rewinder 115, the pressing member 135, and the vibration unit 145. The support frame 107 is provided with a first slide member 108 and a second slide member 110. The support frame 107 is movably coupled to the support unit 102 via a first slide member 108 and a second slide member 110.

The abrasive tape 113 is formed by attaching an abrasive material to the outer surface of the belt-like material, and has a grinding force capable of polishing the surface of the side edge of the thin cover glass 10 with a uniform surface roughness. The abrasive tape 113 is wound around the unwinder 114 to be released by the rewinder 115. That is, the polishing tape 113 wound on the unwinder 114 is unwound from the unwinder 114 and rewound to the rewinder 115.

A support roller 125 for supporting the abrasive tape 113 and guide rollers 126 and 129 and a guide roller 125 for supporting the abrasive tape 113 are provided on the conveying path of the abrasive tape 113 which is unwound from the unwinder 114 and rewound to the rewinder 115, A rotary roller 130, and a pressure roller 131 are provided. The unwinder 114 and the rewinder 115 and the plurality of rollers 125, 126, 129, 130 and 131 are supported on the support frame 107 and are arranged to be inclined with respect to the ground.

The unwinder 114 and the rewinder 115 are rotatably coupled to the support frame 107, respectively. The rewinder 115 is operated by receiving power from the driver 116 and the unwinder 114 rotates by the force of rewinding the abrasive tape 113 while the rewinder 115 rotates to rotate the abrasive tape 113 Untie it.

The driver 116 is installed in the support frame 107. The driving wheel 117 is coupled to the driving machine 116 and the driving force of the driving machine 116 is transmitted to the rewinder 115 via the driving wheel 117 and the pair of reduction gears 120 and 121 and the driven gear 123 . The driving wheel 117 is formed integrally with the driving gear 118 and the driving pulley 119 so that one reduction gear 120 is connected to the driving gear 118. Another reduction gear 121 connects the driving gear 118 and the driven gear 123. [ The rotational force of the driver 116 is decelerated by the driving gear 118 and the reduction gears 120 and 121 and the driven gear 123 to be transmitted to the rewinder 115. The power transmission mechanism for transmitting the rotational force of the driver 116 to the rewinder 115 may be changed into various other structures in addition to the gear train structure as shown.

The pair of support rollers 125 are disposed on both sides of the pressing member 135 to support the polishing tape 113 to maintain a constant tension. The plurality of guide rollers 126 and 129 are rotatably installed on the vibration frame 146 of the vibration unit 145 to support the polishing tape 113 to maintain a constant tension. Some guide rollers 126 of the guide rollers 126 and 129 are installed so as to be oscillatable with respect to the support frame 107. That is, the guide roller 126 is rotatably coupled to a rotary shaft 127 provided on the support frame 107 and is elastically supported by a pair of springs 128 provided at the upper and lower ends of the rotary shaft 127, respectively. Therefore, the guide roller 126 can vibrate while reciprocating in the longitudinal direction of the rotating shaft 127. These guide rollers 126 can stably support the abrasive tape 113 while vibrating together with the abrasive tape 113 when the abrasive tape 113 vibrates by the vibration unit 145.

 The plurality of rotating rollers 130 and the pressure roller 131 serve to increase the feeding force to the abrasive tape 113 which is unwound from the unwinder 114 and rewound to the rewinder 115. The rotating roller 130 is disposed so as to be rotatable in contact with one surface of the abrasive tape 113 on the conveyance path of the abrasive tape 113 and the pressing roller 131 is disposed adjacent to the rotating roller 130 . The pressing roller 131 contacts the other surface of the abrasive tape 113 and presses the abrasive tape 113 with the rotating roller 130. The rotating roller 130 receives rotational force from the driver 116 and rotates. The driven pulley 132 is coupled to the driven pulley 132 and the belt 133 connected to the driven pulley 119 of the driven wheel 117 is connected to the rotating roller 130. The rotating roller 130 receives the rotating force from the driving unit 116 and rotates to add a feeding force to the polishing tape 113 passing between the rotating roller 130 and the pressing roller 131. The polishing tape 113 can be more reliably transferred from the unwinder 114 to the rewinder 115 by the action of the rotating roller 130 and the pressing roller 131. [

Although two sets of the rotary roller 130 and the pressure roller 131 are shown in the figure, the number of the rotary roller 130 and the pressure roller 131 may be variously changed. The power transmitting mechanism for transmitting the rotational force of the actuator 116 to the pair of rotating rollers 130 may be changed to a structure other than the illustrated belt-pulley structure. In addition, a driver separate from the driver 116 that rotates the rewinder 115 may be provided to drive the rotating roller 130 separately from the rewinder 115.

The abrasive tape 113 is not squeezed by the action of a plurality of rollers 125, 126, 129, 130 and 131 provided on the support frame 107, and a predetermined path from the unwinder 114 to the rewinder 115 Can be transported along. The number and arrangement of the rollers provided in the conveyance path of the abrasive tape 113 can be variously changed.

5 to 7, the pressing member 135 is disposed on the conveyance path of the abrasive tape 113 so as to press the abrasive tape 113 with the side edge of the thin cover glass 10. The pressing member 135 presses the abrasive tape 30 against the thin cover glass 10 to increase the frictional force between the abrasive tape 30 and the thin cover glass 10. [ The pressing member 135 is supported by the support frame 107 so that the surface in contact with the abrasive tape 113 is disposed inclined with respect to the paper surface. The abrasive tape 113 can be polished on the side edge of the thin cover glass 10 while maintaining the state in which the abrasive tape 113 stably adheres to the side edge of the thin cover glass 10 by the pressing member 135. [

The pressing member 135 is movably coupled to the support plate 143, which is installed to be supported by the support frame 107. The support plate 143 is provided with a plurality of guides 144 and the pressing member 135 is provided with a plurality of slide bars 136 which are respectively slidably coupled to the plurality of guides 144. The pressing member 135 is advanced and retracted by the pressing mechanism 138. The pressing mechanism 138 is provided on the support plate 143 to adjust the pressing force of the pressing member 135 with respect to the polishing tape 113 by moving the pressing member 135 forward and backward. The pressing force of the polishing tape 113 with respect to the side edge of the thin cover glass 10 changes according to the pressing force of the pressing member 135. As the pressurizing mechanism 138, various structures capable of advancing and retracting the pressing member 135 such as a pneumatic cylinder can be used.

The operation of the pressurizing mechanism 138 is controlled by the control unit 105. [ The control unit 105 receives the detection signal from the pressure sensor 140 provided on the pressure member 135 and performs feedback control of the pressure mechanism 138. [ That is, when the pressure sensor 140 detects the pressing force of the polishing tape 113 with respect to the side edge of the thin cover glass 10 and transmits the detection signal to the control unit 105, And controls the operation of the pressurizing mechanism 138 in accordance with the detection signal of the controller 140.

The pressure sensor 140 is installed in an installation groove 137 provided in the pressing member 135. A spring 142 is provided in the mounting groove 137 to press the pressure sensor 140 toward the abrasive tape 113. The pressure sensor 140 has a sensing portion 141 that contacts a portion of the abrasive tape 113 supported by the pressing member 135. As the sensing unit 141, a piezoelectric element that generates a voltage by being compressed by a pressing force for pressing the abrasive tape 113 can be used. The piezoelectric element can quickly detect a change in the pressing force of the polishing tape 113 with respect to the thin cover glass 10 and provide it to the control unit 105 because the reaction speed is very fast. The control unit 105 performs feedback control of the pressing mechanism 138 in response to a change in the pressing force of the polishing tape 113 so that the pressing force of the polishing tape 113 on the side edge of the thin cover glass 10 is adjusted to an appropriate size . By the feedback control of the pressurizing mechanism 138, the polishing quality for the thin cover glass 10 can be improved.

4 and 6, the vibration unit 145 applies vibration to the pressing member 135 so that the abrasive tape 113 rubs against the thin cover glass 10. The vibration unit 145 relatively moves the polishing tape 113 relative to the thin cover glass 10 at high speed while the polishing tape 113 is conveyed along the conveying path in contact with the side edge of the thin cover glass 10, The polishing efficiency for the cover glass 10 is increased. The vibration unit 145 includes a vibration frame 146 for supporting the pair of support rollers 125 and a cam mechanism 152 for reciprocating the vibration frame 146. [ The vibrating frame 146 is slidably coupled to a plurality of guide bars 149 fixed to the support frame 107. Each of the plurality of guide bars 149 has its upper end fixed to the fixing plate 150. A support plate 143 having a pressing member 135 and a pressing mechanism 138 is fixed to the fixing plate 150.

The cam mechanism 152 includes a cam follower 153, a cam wheel 156, and a motor 159. The cam follower 153 has a connecting rod 154 coupled to the vibrating frame 146 and a roller 155 coupled to the end of the connecting rod 154. The cam wheel 156 and the motor 159 are installed in the support frame 107. The cam wheel 156 is rotated by a motor 159, and has a cam 157 and a guide groove 158. The cam 157 is provided eccentrically at the center of the guide groove 158. The roller 155 of the cam follower 153 is inserted into the guide groove 158. When the cam wheel 156 rotates, the cam follower 153 moves in contact with the outer periphery of the cam 157 rotating in the guide groove 158 so that the vibrating frame 146 is moved in the guide bar 158 149, respectively.

Referring to Figs. 1 to 4, the support unit 102 supports the support frame 107 so as to be adjustable in height and inclination. The supporting unit 102 includes a base 160, an elevating member 162 that is vertically installed on the base 160, and an elevating mechanism 164 that elevates and descends the elevating member 162. The base 160 is provided with a plurality of guides 161 and the elevation member 162 is provided with a plurality of slide bars 163 which are slidably coupled to the plurality of guides 161 respectively. The elevating mechanism 164 includes a screw shaft 165 and a nut member 166 provided on the elevating member 162 to be screwed with the screw shaft 165 and a motor 167 rotating the screw shaft 165 . The elevating mechanism 164 can be changed into various other structures capable of lifting the elevating member 162 in addition to the screw shaft structure.

The elevating member 162 is provided with a supporting column 168 and a supporting bar 169. The support frame 107 is installed on the lifting member 162 so as to be inclined with respect to the ground via the support pillar 168 and the support bar 169. [ The height of the support frame 107 can be adjusted by raising and lowering the elevating member 162 by the elevating mechanism 164.

A first connection member 170 is coupled to the support column 168 and a second connection member 171 is rotatably coupled to the support bar 169. The first linking member 170 is engaged with the first slide member 108 of the support frame 107 and the second linking member 171 is engaged with the second slide member 110 of the support frame 107. The first slide member 108 and the second slide member 110 are provided with grooves 109 and 111, respectively. A fixing member (not shown) is fixed to the first connecting member 170 through the groove 109 of the first slide member 108 and another fixing member (not shown) is fixed to the second sliding member 110 The support frame 107 can be fixed to the first linking member 170 and the second linking member 171 by a method of passing through the grooves 111 and fixing to the second linking member 171. [ The position of the support frame 107 with respect to the lift member 162 is adjusted by a method of adjusting the position of each fixing member in the grooves 109 and 111 of the first slide member 108 and the second slide member 110, Can be adjusted.

The engagement position of the first connection member 170 with respect to the support column 168 can be changed. The second linking member 171 is rotatably coupled to the support bar 169 through the rotation part 172 provided therein. The inclination of the support frame 107 can be adjusted by rotating the second linking member 171 with respect to the support bar 169 in a state where the first linking member 170 is separated from the support pillar 168. [ The inclination of the support frame 107 can be adjusted and the first linking member 170 can be fixed to the support pillar 168 to maintain the inclination of the support frame 107 in an adjusted state. The inclination of the surface of the abrasive tape 113 which contacts the side edge of the thin cover glass 10 can be adjusted by changing the inclination of the support frame 107. [ In this way, the shape of the chamfer of the thin cover glass 10 can be changed during the polishing operation.

Referring to Fig. 1, the fixing unit 103 fixes the thin cover glass 10 parallel to the paper so that the side edge of the thin cover glass 10 contacts the abrasive tape 113. As shown in Fig. The fixing unit 103 may have a structure capable of fixing the thin cover glass 10 by various methods such as an adsorption method using vacuum pressure.

The fixed unit 103 is moved by the transfer unit 104. [ The transfer unit 104 can move the fixed unit 103 to change a portion of the thin cover glass 10 fixed to the fixed unit 103 to contact with the abrasive tape 113. [ The transfer unit 104 includes a first transfer mechanism 174, a second transfer mechanism 175, and a rotation mechanism 176. The first conveying mechanism 174 linearly feeds the fixing unit 103 to the paper surface horizontally and the second conveying mechanism 175 conveys the fixing unit 103 to the conveying direction by the first conveying mechanism 174 In the horizontal direction. The rotation mechanism 176 rotates the fixed unit 103 about the rotation center axis perpendicular to the paper surface.

When the side edge of the thin cover glass 10 is formed in a straight line and longer than the length supported by the pressing member 135 of the polishing tape 30, the thin cover glass 10 is transferred to the transfer unit 104, can do. The thin cover glass 10 fixed to the fixed unit 103 is conveyed horizontally while being conveyed by the conveying unit 104 while a part of the side edges of the thin cover glass 10 is being polished by the abrasive tape 30, You can do the work.

It is possible to adjust the degree of polishing and the polishing dimension of the thin cover glass 10 by adjusting the displacement of the thin cover glass 10 by the transfer unit 104. The thin cover glass 10 is attached to the fixed unit 103 at a position away from the abrasive tape 113 and then the thin cover glass 10 is brought close to the abrasive tape 113 by the transfer unit 104, The thin cover glass 10 may be transferred in the direction away from the polishing tape 113 to eject the thin cover glass 10

The angle of the fixed unit 103 can be adjusted by using the rotation mechanism 176 of the transfer unit 104. In the case of the rectangular thin cover glass 10, the angle of the thin cover glass 10 with respect to the polishing tape 113 can be adjusted by the rotating mechanism 176. In the case of a round or oval thin cover glass, it is possible to polish the side surface of the thin cover glass 10 while rotating the thin cover glass 10 by means of the rotating mechanism 176.

The transfer unit 104 may act as a vibration unit. That is, the thin cover glass 10 can be vibrated by reciprocating the fixed unit 103 with the transfer unit 104 while the thin cover glass 10 is in contact with the abrasive tape 113. The thin cover glass 10 and the polishing tape 113 are simultaneously reciprocated in the opposite direction by using both the vibration unit 145 and the transfer unit 104 as occasion demands, May oscillate together.

Hereinafter, the process of polishing the side edge of the thin cover glass 10 with the side edge polishing apparatus 100 of the thin cover glass according to the present embodiment configured as described above will be described.

First, the thin cover glass 10 is fixed on the fixed unit 103 and fixed. Next, the transfer unit 104 is operated to bring the thin cover glass 10 close to the abrasive tape 30. 7, the pressing mechanism 138 is operated to advance the pressing member 135, thereby bringing the polishing tape 113 into close contact with the side edge of the thin cover glass 10. At this time, by detecting the pressing force of the polishing tape 113 with respect to the thin cover glass 10 by the pressure sensor 140 and controlling the pressing mechanism 138 in accordance with the detection signal, The pressing force of the pressing member 113 can be kept constant.

The polishing tape 113 is rotated at a constant speed from the unwinder 114 to the rewinder 115 by rotating the rewinder 115 with the driver 116 while the abrasive tape 113 is in close contact with the thin cover glass 10 Transfer. At this time, a feeding force is added to the polishing tape 113 fed to the rotating roller 130 and the pressing roller 131, so that the polishing tape 113 can be transported more stably. The abrasive tape 113 is supported by a plurality of rollers 125, 126, 129, 130, and 131, and is conveyed while a tension is maintained constant. The side edge of the thin cover glass 10 can be polished by transferring the polishing tape 113 in a state in which it is in close contact with the side edge of the thin cover glass 10. [ The abrasive tape 113 is rapidly reciprocated with the conveyance of the abrasive tape 113 to vibrate the pair of support rollers 125 supporting the abrasive tape 113 so that the abrasive tape 113 ) Can be increased. Thus, the polishing efficiency for the thin cover glass 10 can be improved.

The pressing force of the polishing tape 113 with respect to the thin cover glass 10 may vary during the polishing operation, so that the pressing force of the polishing tape 113 is continuously monitored by the pressure sensor 140. [ The pressing force of the polishing tape 113 with respect to the thin cover glass 10 can be kept constant by feedback control of the pressing mechanism 138 in real time using the detection signal of the pressure sensor 140.

In addition, the fixing unit 103 fixing the thin cover glass 10 to the transfer unit 104 can be appropriately moved according to the shape of the thin cover glass 10 during the polishing operation. For example, in the case of polishing the thin cover glass 10 whose side length is longer than the length of the portion of the abrasive tape 113 pressed by the pressing member 135, the thin cover glass 10 Can be successively polished on the side surface of the thin cover glass 10 while being continuously transferred along the extending direction of the side surface thereof. When the shape of the thin cover glass 10 is circular, the side surface of the thin cover glass 10 can be continuously polished while rotating the thin cover glass with the transfer unit 104.

The contact area and inclination of the polishing tape 113 contacting the thin cover glass 10 can be adjusted by adjusting the position and angle of the support frame 107 according to the type of the thin cover glass 10. [ The chamfer shape of the side edge of the thin cover glass 10 can be variously changed by adjusting the inclination of the polishing tape 113.

As described above, the use of the side edge polishing apparatus 100 of the thin cover glass according to the present embodiment is advantageous in that the polishing work of the thin cover glass 10 can be automated and performed accurately and quickly. Further, during the polishing operation, the polishing tape 113 is continuously released from the unwinder 10 and rewound on the rewinder 20. Therefore, the polishing work for the thin cover glass 10 can be carried out continuously with the new polishing tape 30 which is not contaminated by the abrasive particles or abrasive particles generated during the polishing operation. In addition, since the abrasive grains or abrasive grains fall downward or rewind to the rewinder 20 in a state where they are attached to the abrasive tape 30, the possibility that the thin cover glass 10 is contaminated or damaged greatly decreases.

Further, the polishing process of the thin cover glass 10 can be effectively automated, and the quality of the polishing process can be maintained uniformly as compared with the case where the polishing process is performed manually.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited to the above-described and illustrated forms.

For example, the vibrating unit 145 moves the pair of support rollers 125 supporting the abrasive tape 113 using the cam mechanism 152 to move the abrasive tape (abrasive tape) The vibrating unit can be changed into a structure that vibrates both the supporting roller 125 and the pressing member 135 that support the abrasive tape 113 in contact with the thin cover glass 10 have. In addition, the vibration unit can be changed into various other structures such as a structure for vibrating the thin cover glass, a structure for vibrating the polishing tape and the thin cover glass at the same time.

It is also shown in the drawing that only the rewinder 115 is rotated by the driving force of the driver 116 and the unwinder 114 idles. However, since the rewinder 115 and the unwinder 114 are both driven by one actuator Or may be rotated by a separate actuator, respectively.

In the drawings, the pressure sensor 140 is mounted on the pressure member 135 so as to be in contact with the polishing tape 113, but the mounting position of the pressure sensor 140 can be variously changed. In addition to the structure having the piezoelectric element as described above, the pressure sensor is provided with a variety of sensors capable of detecting the pressing force of the polishing tape 113 with respect to the thin cover glass 10 in contact or non-contact manner with the polishing tape 113 It can be changed to another structure.

Also, although the figure shows that the support frame 107 is mounted on the support unit 102 so as to be manually inclined, the support frame 107 may be installed on the support unit so that it can be automatically inclined.

Although the side edge polishing apparatus 100 of the thin cover glass according to the present invention has been described above as being used for chamfering the side edge of the thin cover glass 10, In addition to the chamfering operation for the thin cover glass, the surface of the thin cover glass can be smoothly polished.

10: thin cover glass 100: polishing apparatus
101: polishing unit 102: supporting unit
103: fixed unit 104: conveying unit
105: control unit 107: support frame
108, 110: first and second slide members 109, 111: grooves
113: abrasive tape 114: unwinder
115: Rewinder 116: Actuator
117: driving wheel 118: driving gear
119: drive pulley 120, 121: reduction gear
123: driven gear 125: support roller
126, 129: Guide roller 127:
128, 142: spring 130: rotating roller
131: pressure roller 132: driven pulley
133: belt 135: pressure member
138: Pressure device 140: Pressure sensor
141: sensing part 143: supporting plate
145: vibration unit 146: vibration frame
149: Guide bar 150: Fixing plate
152: cam mechanism 153: cam follower
154: connection rod 155: roller
156: cam wheel 157: cam
159, 167: motor 160: base
162: lifting member 164: lifting member
165: screw shaft 166: nut member
168: Support column 169: Support bar
170, 171: first and second connecting members 174, 175: first and second feeding mechanisms
176: Rotation mechanism

Claims (10)

A fixing unit for fixing the thin cover glass;
An abrasive tape having an abrasive material attached to a belt-like material to abrade the side edge of the thin cover glass in contact with the thin cover glass fixed to the fixed unit;
An unwinder for winding the abrasive tape around;
A rewinder for rewinding the abrasive tape released from the unwinder;
A pressing member which is disposed on the conveying path of the abrasive tape to be unwound from the unwinder and rewinds to the rewinder to press the abrasive tape to the side edge of the thin cover glass; And
And a pressing mechanism for moving the pressing member to advance and retreat so as to adjust the pressing force of the polishing tape with respect to the side edge of the thin cover glass. The method according to claim 1,
A pressure sensor installed on the pressing member so as to detect a pressing force of the polishing tape with respect to a side edge of the thin cover glass; And
And a control unit for receiving the detection signal of the pressure sensor and controlling the operation of the pressing mechanism. 3. The method of claim 2,
Wherein the pressure sensor comprises a piezoelectric element which is compressed by a pressing force of the pressing member to press the polishing tape to generate a voltage. The method according to claim 1,
And a vibration unit for applying a vibration to any one of the thin cover glass and the abrasive tape such that any one of the thin cover glass and the abrasive tape rubs against the other, Abrasive device. 5. The method of claim 4,
The vibration unit includes:
A vibration frame,
A pair of support rollers provided on the vibrating frame so as to be disposed on both sides of the pressing member to support the abrasive tape,
A guide bar for slidably supporting the vibrating frame,
And a cam mechanism connected to the vibration frame to reciprocate the vibration frame along the guide bar. The method according to claim 1,
A rotating roller provided on the conveying path of the abrasive tape so as to be rotatable in contact with one surface of the abrasive tape;
A pressing roller provided on a conveying path of the abrasive tape so as to press the abrasive tape with the rotating roller in contact with the other surface of the abrasive tape; And
And a driver for applying a rotational force to the rotating roller. ≪ Desc / Clms Page number 19 > The method according to claim 1,
And a support frame for supporting the unwinder, the rewinder, and the pressing member so as to be inclined relative to the paper surface such that a surface of the abrasive tape contacting the side edge of the thin cover glass is inclined relative to the paper surface Wherein the edge of the side edge of the thin coverglass is polished. 8. The method of claim 7,
Further comprising a support unit for supporting the support frame in such a manner that the support frame can be inclined so that the inclination of the surface of the abrasive tape contacting the side edge of the thin cover glass can be changed. . 8. The method of claim 7,
A lifting member for supporting the support frame; And
And an elevating mechanism for elevating and lowering the elevating member. The method according to claim 1,
Further comprising a transfer unit for moving the fixed unit such that a portion of the thin cover glass that contacts the abrasive tape is changed.
KR1020150130303A 2015-09-15 2015-09-15 Apparatus for Grinding Side Edge of Thin Glass Cover KR20170032928A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190006796A (en) * 2017-07-11 2019-01-21 주식회사 케이씨텍 Circulating moving unit and substrate polishing apparatus comprising the same
KR20200020293A (en) * 2018-08-17 2020-02-26 주식회사 일각금속 Multi-axis grinding device for automatically polishing the outer surface of the mobile phone case
KR20220076664A (en) * 2020-12-01 2022-06-08 주식회사 에이치비테크놀러지 Apparatus for Polishing Defects Using Polishing Tapes
KR20220076695A (en) * 2020-12-01 2022-06-08 주식회사 에이치비테크놀러지 Polishing Tape Case

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080013746A (en) 2006-08-08 2008-02-13 소니 가부시끼 가이샤 Polishing method and polishing device
KR101025263B1 (en) 2008-11-28 2011-03-29 주식회사 엘지실트론 Tape polisher
KR20130114955A (en) 2012-04-10 2013-10-21 엘지디스플레이 주식회사 Method of polishing a thin glass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080013746A (en) 2006-08-08 2008-02-13 소니 가부시끼 가이샤 Polishing method and polishing device
KR101025263B1 (en) 2008-11-28 2011-03-29 주식회사 엘지실트론 Tape polisher
KR20130114955A (en) 2012-04-10 2013-10-21 엘지디스플레이 주식회사 Method of polishing a thin glass

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190006796A (en) * 2017-07-11 2019-01-21 주식회사 케이씨텍 Circulating moving unit and substrate polishing apparatus comprising the same
KR20200020293A (en) * 2018-08-17 2020-02-26 주식회사 일각금속 Multi-axis grinding device for automatically polishing the outer surface of the mobile phone case
KR20220076664A (en) * 2020-12-01 2022-06-08 주식회사 에이치비테크놀러지 Apparatus for Polishing Defects Using Polishing Tapes
KR20220076695A (en) * 2020-12-01 2022-06-08 주식회사 에이치비테크놀러지 Polishing Tape Case

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