U.S. patent application number 14/311484 was filed with the patent office on 2015-01-01 for apparatus for grinding a surface of substrate.
The applicant listed for this patent is SAMSUNG DISPLAY CO., LTD.. Invention is credited to Dae Sik HONG.
Application Number | 20150004882 14/311484 |
Document ID | / |
Family ID | 52116040 |
Filed Date | 2015-01-01 |
United States Patent
Application |
20150004882 |
Kind Code |
A1 |
HONG; Dae Sik |
January 1, 2015 |
APPARATUS FOR GRINDING A SURFACE OF SUBSTRATE
Abstract
An apparatus for grinding a surface of a substrate, the
apparatus including an inlet through which a jig accommodating the
substrate is put; a grinding part that grinds the substrate
conveyed from the inlet; and a washing part that washes the
substrate conveyed from the grinding part, wherein the grinding
part includes a plurality of rollers, the plurality of rollers
having a protruding curved surface facing the jig and rotating on a
surface of the substrate to grind the substrate, and the inlet, the
grinding part, and the washing part are continuously conveyed by a
conveyor.
Inventors: |
HONG; Dae Sik; (Cheonan-si,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SAMSUNG DISPLAY CO., LTD. |
Yongin-City |
|
KR |
|
|
Family ID: |
52116040 |
Appl. No.: |
14/311484 |
Filed: |
June 23, 2014 |
Current U.S.
Class: |
451/73 |
Current CPC
Class: |
B24B 27/0023 20130101;
B24B 29/005 20130101; B24B 27/0069 20130101; B24B 41/06 20130101;
B24D 13/145 20130101; B24B 13/015 20130101; B24B 13/0031 20130101;
B24B 13/005 20130101; B24B 41/068 20130101; B24B 27/0076
20130101 |
Class at
Publication: |
451/73 |
International
Class: |
B24B 27/00 20060101
B24B027/00; B24B 41/06 20060101 B24B041/06 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 28, 2013 |
KR |
10-2013-0075689 |
Claims
1. An apparatus for grinding a surface of a substrate, the
apparatus comprising: an inlet through which a jig accommodating
the substrate is put; a grinding part that grinds the substrate
conveyed from the inlet; and a washing part that washes the
substrate conveyed from the grinding part, wherein: the grinding
part includes a plurality of rollers, the plurality of rollers
having a protruding curved surface facing the jig and rotating on a
surface of the substrate to grind the substrate, and the inlet, the
grinding part, and the washing part are continuously conveyed by a
conveyor.
2. The apparatus as claimed in claim 1, wherein the rollers are
orthogonally disposed relative to a conveyance direction of the
jig.
3. The apparatus as claimed in claim 1, wherein the jig includes a
substrate disposition part for accommodating the substrate.
4. The apparatus as claimed in claim 3, wherein the substrate
disposition part of the jig is recessed in the jig and faces the
rollers.
5. The apparatus as claimed in claim 4, wherein: a number of
substrate disposition parts of the jig is the same as a number of
rollers of the grinding part, and the substrate disposition parts
are disposed to face each of the rollers.
6. The apparatus as claimed in claim 3, wherein the substrate
disposition part of the jig convexly protrudes toward the
roller.
7. The apparatus as claimed in claim 6, wherein: the substrate
disposition part is plural in number, each substrate disposition
part of the jig is offset from the rollers such that each substrate
disposition part is between two rollers, depending on movement of
the jig, and central portions of respective rollers are aligned
between the substrate disposition parts.
8. The apparatus as claimed in claim 3, wherein the substrate
disposition part of the jig includes a vacuum holding part for
coupling with and holding the substrate.
9. The apparatus as claimed in claim 1, wherein a lower portion of
each of the rollers includes a lattice-shaped brush.
10. The apparatus as claimed in claim 9, wherein the lower portion
of each of the rollers includes a groove, the groove containing an
abrasive.
11. The apparatus as claimed in claim 9, wherein a hair diameter of
the brush is 0.1 to 0.5 mm.
12. The apparatus o as claimed in claim 9, wherein a hair length of
the brush is 6 to 10 mm.
13. The apparatus as claimed in claim 9, wherein adjacent rollers
of the plurality of rollers rotate in directions opposite to each
other.
14. The apparatus as claimed in claim 1, wherein the grinding part
further includes an abrasive administration part.
15. The apparatus as claimed in claim 1, further comprising: an
inspection part after the washing part; and a separation and
arrangement part.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] Korean Patent Application No. 10-2013-0075689, filed on Jun.
28, 2013, in the Korean Intellectual Property Office, and entitled:
"Apparatus For Grinding Surface of Substrate," is incorporated by
reference herein in its entirety.
BACKGROUND
[0002] 1. Field
[0003] Embodiments relate to an apparatus for grinding a surface of
a substrate.
[0004] 2. Description of the Related Art
[0005] A display window used in a mobile phone may include an acryl
resin, which may be inexpensive and easily prepared. However, as a
method for performing a function of a mobile phone by a touch is
increases in popularity, a synthetic resin material, e.g., acryl,
may not be used due to scratch susceptibility, low strength,
vulnerability to heat, low transmittance, high battery consumption
for keeping luminance, or the like. Accordingly, tempered glass may
be used for a touch panel.
[0006] The tempered glass may undergo a process of cutting disk
glass in the state of being loaded into a cassette to have an
appearance of window glass, grinding an outline, performing hole
and chamfering machining, and machining an appearance by grinding
an inner surface of a hole. Next, both surfaces of the window glass
may be ground and undergo a post process, e.g., a washing process
and a heat treatment process, and then the manufacturing of the
window glass may be completed.
[0007] The above information disclosed in this Background section
is only for enhancement of understanding of the background of the
invention and therefore it may contain information that does not
form the prior art that is already known in this country to a
person of ordinary skill in the art.
SUMMARY
[0008] Embodiments are directed to an apparatus for grinding a
surface of a substrate.
[0009] The embodiments may be realized by providing an apparatus
for grinding a surface of a substrate, the apparatus including an
inlet through which a jig accommodating the substrate is put; a
grinding part that grinds the substrate conveyed from the inlet;
and a washing part that washes the substrate conveyed from the
grinding part, wherein the grinding part includes a plurality of
rollers, the plurality of rollers having a protruding curved
surface facing the jig and rotating on a surface of the substrate
to grind the substrate, and the inlet, the grinding part, and the
washing part are continuously conveyed by a conveyor.
[0010] The rollers may be orthogonally disposed relative to a
conveyance direction of the jig.
[0011] The jig may include a substrate disposition part for
accommodating the substrate.
[0012] The substrate disposition part of the jig may be recessed in
the jig and faces the rollers.
[0013] A number of substrate disposition parts of the jig may be
the same as a number of rollers of the grinding part, and the
substrate disposition parts may be disposed to face each of the
rollers.
[0014] The substrate disposition part of the jig convexly may
protrude toward the roller.
[0015] The substrate disposition part may be plural in number, each
substrate disposition part of the jig may be offset from the
rollers such that each substrate disposition part is between two
rollers, depending on movement of the jig, and central portions of
respective rollers may be aligned between the substrate disposition
parts.
[0016] The substrate disposition part of the jig may include a
vacuum holding part for coupling with and holding the
substrate.
[0017] A lower portion of each of the rollers may include a
lattice-shaped brush.
[0018] The lower portion of each of the rollers may include a
groove, the groove containing an abrasive.
[0019] A hair diameter of the brush may be 0.1 to 0.5 mm.
[0020] A hair length of the brush may be 6 to 10 mm.
[0021] Adjacent rollers of the plurality of rollers may rotate in
directions opposite to each other.
[0022] The grinding part may further include an abrasive
administration part.
[0023] The apparatus may further include an inspection part after
the washing part; and a separation and arrangement part.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Features will be apparent to those of skill in the art by
describing in detail exemplary embodiments with reference to the
attached drawings in which:
[0025] FIG. 1 illustrates a diagram schematically showing an
apparatus for grinding a surface of a substrate according to an
embodiment.
[0026] FIG. 2 illustrates a perspective view of a jig having a
recessed shape against a roller according to an embodiment.
[0027] FIG. 3 illustrates a cross-sectional view taken along line
of FIG. 2.
[0028] FIG. 4 illustrates a perspective view a jig having a
protruding shape against the roller according to an embodiment.
[0029] FIG. 5 illustrates a cross-sectional view taken along line
V-V of FIG. 4.
[0030] FIG. 6 illustrates a diagram showing a roller of a grinding
part according to an embodiment.
[0031] FIG. 7 illustrates a diagram showing a ground cross
sectional shape of a substrate G according to an embodiment, in
which FIG. 7a illustrates a diagram showing an outside ground cross
sectional shape and FIG. 7b illustrates a diagram showing an inside
ground cross sectional shape.
[0032] FIG. 8 illustrates a diagram showing a contact shape of a
lower brush of a roller at the time of grinding the substrate
according to an embodiment.
DETAILED DESCRIPTION
[0033] Example embodiments will now be described more fully
hereinafter with reference to the accompanying drawings; however,
they may be embodied in different forms and should not be construed
as limited to the embodiments set forth herein. Rather, these
embodiments are provided so that this disclosure will be thorough
and complete, and will fully convey exemplary implementations to
those skilled in the art.
[0034] In the drawing figures, the dimensions of layers and regions
may be exaggerated for clarity of illustration. Like reference
numerals refer to like elements throughout.
[0035] It will be understood that when an element such as a layer,
film, region, or substrate is referred to as being "on" another
element, it can be directly on the other element or intervening
elements may also be present. In contrast, when an element is
referred to as being "directly on" another element, there are no
intervening elements present.
[0036] Hereinafter, an apparatus for grinding a surface of a
substrate according to an embodiment will be described in detail
with the accompanying drawings.
[0037] FIG. 1 illustrates a schematic view of an apparatus for
grinding a surface of a substrate according to an embodiment.
[0038] The apparatus for grinding a surface of a substrate
according to an embodiment may include an inlet 100 for a jig 10, a
grinding part 200 for the jig 10 that grinds the substrate G, and a
washing part 300. In an implementation, the apparatus may include
an inspection part 400 and a separation and arrangement part
500.
[0039] The jig 10 may be sequentially conveyed from the inlet 100
to the grinding part 200, the washing part 300, the inspection part
400, and the separation and arrangement unit 500 through a conveyor
1000.
[0040] The inlet 100 for the jig 10, the grinding part 200, and the
washing part 300 may be connected to the conveyor 1000, which may
horizontally move the jig 10 that accommodates the substrate G.
[0041] The inlet 100 may be a part of the apparatus for grinding a
surface of a substrate according to an embodiment into which the
jig 10 (accommodating the substrate G), is inserted.
[0042] The grinding part 200 may be a part that grinds the
substrate G conveyed through the conveyer 1000 from the inlet 100,
while being accommodated by the jig 10.
[0043] The grinding part 200 may be movably coupled on the conveyor
1000, and may include a plurality of rollers 20 having a protruding
curved surface against the jig 10 (in which the substrate G to be
ground is accommodated).
[0044] The grinding part 200 may include an abrasive administration
part into or through which the abrasive for grinding the substrate
G, which is disposed between the roller 20 and the jig 10, may be
administrated.
[0045] In an implementation, the abrasive may include, e.g., cerium
oxide (CeO.sub.2). In an implementation, at the time of grinding
the substrate G, the abrasive may be sprayed between a brush 23
(see FIG. 6) and the substrate G.
[0046] The plurality of rollers 20 may be a part of a grinding
apparatus that grinds a surface of the substrate G. The plurality
of rollers 20 may be disposed in several steps along a conveyance
direction of the conveyor 1000 so as to perform the grinding
several times.
[0047] The roller 20 may contact the substrate G while rotating
clockwise or counterclockwise to grind the substrate G. A contact
portion between the roller 20 and the substrate G may be configured
of a lattice shaped brush 23. A hair diameter of the brush 23 under
the roller 20 may be about 0.1 mm to about 0.5 mm. A hair length of
the brush 23 may be about 6 mm to about 10 mm. A lower portion of
the roller 20 may include a groove that may contain the abrasive
injected into the grinding part 200.
[0048] The substrate G (seated on substrate disposition parts 11
and 12 (see FIGS. 2-5) of the jig 10) may contact the brush 23
(disposed in the roller 20). Thus, as the roller 20 rotates, the
substrate G may be ground. For example, the protruding substrate G
may be ground in a space between the respective rollers 20, and the
recessed substrate G may be ground while the respective substrates
G face the respective rollers 20, e.g., forward.
[0049] The washing part 300 may be a part that washes the substrate
G that has been ground by the roller 20. The washing part 300 may
wash grinding dregs, the abrasive, or the like, that may be
generated by the grinding and that may remain on the substrate G by
using a cleaning agent.
[0050] The inspection part 400 and the separation and arrangement
part 500, which may be additionally included, may be parts that
inspect whether the ground state of the ground substrate G (that
has been conveyed through the conveyor 1000 via the grinding part
200 and the washing part 300) is defective and that separate the
substrate G without a defect from the jig 10. The substrate G with
a defect may be ground and washed again, depending on the content
or degree of defects.
[0051] The roller 20 may be vertically disposed upwardly with
respect to the conveyance direction of the jig 10. Thus, the roller
20 may grind the substrate G accommodated by the jig 10 by
contacting the substrate G from top to bottom.
[0052] Hereinafter, the jig 10a for grinding of the recessed
substrate G and the substrate G disposed thereon will be described
in detail with reference to FIGS. 2 and 3.
[0053] FIGS. 2 and 3 illustrate perspective and cross-sectional
views of a jig 10a having a recessed shape against the roller 20
according to an embodiment.
[0054] Referring to FIG. 2, the substrate disposition part 11 may
be formed in the jig 10a, and may have a recessed shape against or
corresponding to the roller 20. Thus, the jig 10a may be for
grinding the recessed surface of the substrate G.
[0055] In an implementation, a number of jigs 10a may be the same
as a number of the rollers 20 in the grinding part 300. The
substrate disposition part 11 may be configured so that the
substrate G may be ground by allowing respective rollers to
correspond to the respective substrates G in a one to one
relationship. FIG. 2 illustrates that six substrates G may be
seated in the jig 10. In an implementation, a number of substrates
G larger or smaller than six may be seated.
[0056] The cross-sectional view of the jig 10a having the recessed
substrate disposition part 12 is illustrated in FIG. 3.
[0057] Referring to FIG. 3, each substrate G may be ground by being
disposed in each of the substrate disposition parts 11 of the jig
10a. A curvature of each substrate disposition part 11 may be the
same as that of the substrate G.
[0058] The substrate G may be made of glass, and a central part
thereof may include a recessedly or concave bent curved surface.
The substrate disposition part 11 of the jig 10a may include a
recessed portion so that the substrate G (including the curved
surface) may be accommodated. Each substrate disposition part 11
may further include a vacuum holding part (not illustrated) for
accommodating and holding the loaded substrate G.
[0059] Hereinafter, a jig 10b for grinding of the substrate G and
the substrate G disposed thereon will be described in detail with
reference to FIGS. 4 and 5.
[0060] FIGS. 4 and 5 illustrate perspective and cross-sectional
views of a jig 10b having a protruding shape against the roller 20
according to an embodiment.
[0061] Referring to FIG. 4, the substrate disposition part 12 may
be disposed on the jig 10b, and may have a protruding shape for
protruding against a recessed portions of the edges of at least
two, e.g., adjacent, rollers 20. The jig 10b illustrated in FIGS. 4
and 5 may be for grinding a surface of the protruding substrate
G.
[0062] The substrate disposition part 12 may be configured so that
the substrate G may be ground by allowing the jig 10b to be
correspondingly disposed between at least two rollers 20, e.g.,
adjacent rollers 20, disposed in the grinding part 300.
[0063] The cross-sectional view of the jig 10b having the
protruding substrate disposition part 12 is illustrated in FIG.
5.
[0064] Referring to FIG. 5, each substrate G may be ground by being
disposed on each of the substrate disposition parts 12 of the jig
10b. A curvature of each substrate disposition part 12 may be the
same as that of the substrate G.
[0065] In an implementation, the substrate G may be made of glass.
A central part of the substrate G may include a protrudedly or
convex bent curved surface. The substrate disposition part 12 may
include a protruding portion so that the jig 10b may accommodate
the substrate G (including the curved surface). Each substrate
disposition part 12 may further include the vacuum holding part for
accommodating and holding the loaded substrate G.
[0066] The recessed portion 11 of the jig 10a may be seated with
the substrate G by contacting a first surface (hereinafter,
referred to as a back surface) of the substrate G. The protruding
portion 12 of the jig 10b may be seated with the substrate G by
contacting a second surface (hereinafter, referred to as a front
surface) of the substrate G, which is an opposite side to the back
surface of the substrate G.
[0067] For example, the front surface of the substrate G may be
exposed when the substrate G is in the recessed portion 11 of the
jig 10, and the back surface of the substrate G may be exposed when
the substrate G is on the protruding portion 12 of the jig 10. As
described above, the substrates G seated in the recessed portion 11
or on the protruding portion 12 of the jig 10 may each expose the
front and back surfaces to grind the front and back surfaces of the
substrate G.
[0068] Hereinafter, the roller 20 of the grinding part 200 will be
described in detail with reference to FIG. 6.
[0069] FIG. 6 illustrates a diagram showing a roller of a grinding
part according to an embodiment.
[0070] The roller 20 may contact the substrate G (while rotating
clockwise or counterclockwise) to grind the substrate G. A contact
portion between the roller 20 and the substrate G may be configured
of a lattice shaped brush 23. When the brush 23 has a straight
shape, the brush 23 may rotate only in one direction, such that
scratches may occur on the surface of the substrate G. In an
implementation, the brush 23 may have a lattice shape and may form
a lower portion of the roller 20 to thus help prevent the scratch
from occurring on the substrate G. The roller 20 may include a
rotating part 24 and a roller body 26.
[0071] The hair diameter of the brush 23 of the lower portion of
the roller 20 may be about 0.1 mm to about 0.5 mm. Maintaining the
hair diameter at about 0.1 mm or greater may help ensure that the
surface of the substrate G is ground well. Maintaining the hair
diameter at about 0.5 mm or less may help prevent damage to the
surface of the substrate G.
[0072] The hair length of the brush 23 of the lower portion of the
roller 20 may be about 6 to about 10 mm. When the brush 23 has the
hair length in the range, an end of the brush 23 may be pressed by
a pressure appropriate for the roller 20 to perform the grinding on
the side of the brush 23, thereby reducing and/or preventing the
likelihood of undesirable scratches.
[0073] A curved surface of the lower portion of the roller 20 may
correspond to the front surface of the substrate G. A curved
surface at a point at which the lower portions of the two rollers
20 meet may correspond to the back surface of the substrate G. As
noted above, the substrate G may be ground by the brush 23 at the
lower portion of the roller 20. Thus, the curved surface of the
lower portion of the roller 20 may not accurately coincide with
that of the substrate G, and the grinding may be performed even in
the case in which a predetermined margin between the curvature of
the curved surfaces is present.
[0074] The lower portion of the roller 20 may include the groove
for containing or providing the abrasive to be injected into the
grinding part 200. In this case, a groove is cut in the brush 23 of
the roller 20 to be able to effectively contain the abrasive.
[0075] The plurality of rollers 20 may be disposed in the grinding
part 200. Adjacent rollers may rotate clockwise and
counterclockwise, respectively, e.g., in an opposite direction to
each other.
[0076] Hereinafter, the grinding shape of the substrate G by the
roller 20 will be described in detail with reference to FIG. 7.
[0077] FIG. 7 illustrates a cross-sectional view showing a ground
cross sectional shape of the substrate G according to an
embodiment. For example, FIG. 7a illustrates a diagram showing an
outside ground cross sectional shape and illustrates a cross
section at the time of grinding the protruding substrate G, and
FIG. 7b illustrates a diagram showing an inside ground cross
sectional shape and illustrates a cross section at the time of
grinding the recessed substrate G.
[0078] Referring to FIG. 7, when the jig 10 (in or on which the
substrate G is seated or accommodated) is conveyed to the grinding
part 200 from the inlet 100 by the conveyor 1000, the surface of
the substrate G may be ground by the roller 20 of the grinding part
200.
[0079] The substrate G (seated in or on the substrate disposition
parts 11 and 12 of the jig 10) may contact the brush 23 of the
roller 20, and thus may be ground by rotating the roller 20. In an
implementation, the abrasive may be sprayed between the brush 23
and the substrate G.
[0080] The grinding of the protruding substrate G may be performed
in a space between the respective rollers 20 (7a), e.g., offset
from the rollers 20. The grinding of the recessed substrate G may
be performed so as to allow the respective substrates G to face the
respective rollers 20 (7b), e.g., aligned with the rollers 20.
[0081] Referring to FIG. 7a, as the ground shape of the back
surface corresponding to the protruding portion of the substrate G,
respective substrates G may be disposed between the respective
rollers 20, e.g., offset from the rollers 20. For example, the
respective substrates G may be ground in a state in which the
central portion of the roller 20 is disposed between the respective
substrates G. In this case, the respective rollers 20 contacting
the single substrate G may grind the substrate G while rotating in
an opposite direction.
[0082] Referring to FIG. 7b as the ground shape of the front
surface corresponding to the recessed portion of the substrate G,
the roller 20 may correspond to the substrate G in an one to one
relationship in the state in which the respective substrates G
faces the respective rollers 20, e.g., the front surface of the
substrate G is aligned with a respective one of the rollers 20.
Accordingly, the substrate G may be ground by the rotation of the
roller 20.
[0083] In an implementation, the substrate G may be seated in or on
the jig 10 and may be ground while moving through the conveyor
1000. For example, the substrate G may be ground while passing
through the plurality of rollers 20. In this case, the conveyor
1000 may not stop for more than 10 seconds. If the conveyor 1000
were to stop for longer than 10 seconds, e.g., if the substrate G
stops for more than 10 seconds without moving, the roller 20 may
continuously rotate to grind the substrate G and the surface of the
substrate G may be damaged.
[0084] FIG. 8 illustrates a diagram showing a contact shape when
the brush 23 of the lower portion of the roller 20 according to an
embodiment grinds the substrate G.
[0085] Referring to FIG. 8, it may be seen that grinding may be
performed while a side of the brush 23 of the lower portion of the
roller 20 contacts the substrate G.
[0086] At the time of grinding the substrate G, after an end of the
brush 23 contacts the surface of the substrate G, the roller 20 may
move vertically with respect to the substrate G by about 3 mm. In
this case, as the roller 20 rotates while the lower portion of the
brush 23 contacts the surface of the substrate G, the surface of
the substrate G may be ground by using the side of the brush 23 at
the lower portion of the roller 20.
[0087] Referring to FIG. 8, the upper figure shows a state in which
the end of the brush 23 contacts the surface of the substrate G at
the time of grinding the substrate G, and the lower figure
illustrates a state in which the brush 23 is pressed vertically or
downwardly by about 3 mm relative to the substrate G by moving the
roller 20 toward the substrate (G) direction by about 3 mm (from
the state in which the end of the brush 23 contacts the surface of
the substrate G) to thus be in the state in which the side of the
brush 23 contacts the surface of the substrate G.
[0088] The grinding of the substrate G may be performed in the
state of the brush 20 as illustrated in the lower figure of FIG.
8.
[0089] By way of summation and review, in the manufacturing process
of the tempered glass, in the case of a plate-shaped glass, the
grinding of both surfaces of the window glass may be finished by a
relatively simpler process. However, when the surface of the window
glass has a curved shape, the surface grinding may not be
effectively or efficiently performed. After window glass is
machined in a curved shape, a surface grinding process, e.g.,
lapping and polishing for making the window glass glossy and
transparent, may be performed. The curved surface grinding may be
manually performed on each portion on the curved surface, and the
working time is very long due to the surface grinding working,
thereby remarkably reducing productivity, making the transparency
of the window glass non-uniform, and frequently damaging the window
glass during the working.
[0090] Further, a curved surface may be manually ground or may be
ground by a CNC machine. In such a case, only the curved surface
(edge), which is a specific portion, may be ground. Thus, the edge
may have a different color from a plane (middle portion), which
does not undergo the grinding. Such a difference in color may be
regarded as color inferiority due to a color deviation. Even in the
case of performing a rework due to the occurrence of scratches, the
curved portion, which is the edge, may be cut. Therefore the
grinding working may not be performed by a flat-surface grinding
machine, scratches may occur on the surface of the glass substrate
at the time of contact between a grinding plate and a glass
substrate that are used during the grinding process of the glass
substrate, and the scratch of the glass substrate may deteriorate
the performance of a display device using the glass substrate.
[0091] As set forth above, according to an embodiment, even when
the substrate for protecting a screen of the liquid crystal display
has a curved shape, all grinding processes of the grinding,
washing, and inspection of the curved portion in a single grinding
system may be performed. In addition, the inner circumferential
surface of the substrate and/or the outer circumferential surface
having the curved shape may be ground without hindering the
movement of the conveyor.
[0092] Further, according to an embodiment, it is possible to
reduce and/or prevent scratching of the substrate by rotating a
lattice-shaped grinding brush in different directions.
[0093] The embodiments may provide an apparatus for grinding a
surface of a substrate, the apparatus being capable of effectively
performing grinding machining on a substrate having a curved
surface while simultaneously performing external and internal
grinding machining during the grinding process of the substrate,
thereby simplifying a process and improving productivity.
[0094] According to an embodiment, even when the substrate for
protecting a screen of the liquid crystal display has a curved
shape, all grinding processes of the grinding, washing, and
inspection of the curved portion in a single grinding system may be
performed, and the inner circumferential surface of the substrate
or the outer circumferential surface having the curved shape may be
ground, without hindering the movement of the conveyor.
[0095] Further, according to an embodiment, it is possible to
prevent scratching of the substrate by rotating a lattice-shaped
grinding brush in different directions.
[0096] Example embodiments have been disclosed herein, and although
specific terms are employed, they are used and are to be
interpreted in a generic and descriptive sense only and not for
purpose of limitation. In some instances, as would be apparent to
one of ordinary skill in the art as of the filing of the present
application, features, characteristics, and/or elements described
in connection with a particular embodiment may be used singly or in
combination with features, characteristics, and/or elements
described in connection with other embodiments unless otherwise
specifically indicated. Accordingly, it will be understood by those
of skill in the art that various changes in form and details may be
made without departing from the spirit and scope of the present
invention as set forth in the following claims.
* * * * *