U.S. patent application number 15/255122 was filed with the patent office on 2017-03-02 for transverse hairlines forming apparatus for stainless coil and stainless coil formed by the same.
The applicant listed for this patent is Samsung Electronics Co., Ltd. Invention is credited to Young-tae Kim, Jin-o Kwak, Shang-hun Lee, Do-soo Sung.
Application Number | 20170057045 15/255122 |
Document ID | / |
Family ID | 58103576 |
Filed Date | 2017-03-02 |
United States Patent
Application |
20170057045 |
Kind Code |
A1 |
Sung; Do-soo ; et
al. |
March 2, 2017 |
TRANSVERSE HAIRLINES FORMING APPARATUS FOR STAINLESS COIL AND
STAINLESS COIL FORMED BY THE SAME
Abstract
A transverse hairline forming apparatus includes a coil
supporting unit to which a stainless steel coil is rotatably
disposed; a coil winding unit spaced apart from the coil supporting
unit, the coil winding unit holding and winding an end of the
stainless steel coil; and at least one pair of surface treatment
units disposed between the coil supporting unit and the coil
winding unit, the at least one pair of surface treatment units
configured to form transverse hairlines on a surface of the
stainless steel coil perpendicular to a winding direction of the
stainless steel coil. While the stainless steel coil is unwound and
rewound on the coil winding unit, when the stainless steel coil
passes below the at least one pair of surface treatment units, the
at least one pair of surface treatment units form the transverse
hairlines on the surface of the stainless steel coil.
Inventors: |
Sung; Do-soo; (Gyeonggi-do,
KR) ; Kwak; Jin-o; (Gyeonggi-do, KR) ; Kim;
Young-tae; (Gyeonggi-do, KR) ; Lee; Shang-hun;
(Gyeonggi-do, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Samsung Electronics Co., Ltd |
Gyeonggi-do |
|
KR |
|
|
Family ID: |
58103576 |
Appl. No.: |
15/255122 |
Filed: |
September 1, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B24B 21/006 20130101;
F25D 2400/18 20130101; F25D 11/00 20130101; B24B 19/028 20130101;
F25D 23/028 20130101 |
International
Class: |
B24B 19/02 20060101
B24B019/02; F25D 23/02 20060101 F25D023/02; B24B 21/00 20060101
B24B021/00; F25D 11/00 20060101 F25D011/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 1, 2015 |
KR |
10-2015-0123494 |
Claims
1. A transverse hairline forming apparatus for a stainless steel
coil, the transverse hairline forming apparatus comprising: a coil
supporting unit to which a stainless steel coil is rotatably
disposed; a coil winding unit spaced apart from the coil supporting
unit, the coil winding unit holding and winding an end of the
stainless steel coil; and at least one pair of surface treatment
units disposed between the coil supporting unit and the coil
winding unit, the at least one pair of surface treatment units
configured to form transverse hairlines on a surface of the
stainless steel coil perpendicular to a winding direction of the
stainless steel coil, wherein, while the stainless steel coil is
unwound from the coil supporting unit and then is rewound on the
coil winding unit, when the stainless steel coil passes below the
at least one pair of surface treatment units, the at least one pair
of surface treatment units form the transverse hairlines on the
surface of the stainless steel coil.
2. The transverse hairline forming apparatus of claim 1, wherein
each of the at least one pair of surface treatment units comprises,
a grinding belt of a caterpillar shape; a drive roller disposed at
an end of an inner side of the grinding belt, the drive roller to
rotate the grinding belt; a driven roller disposed at another end
of the inner side of the grinding belt, the driven roller to
support the grinding belt to be moved endlessly by the drive
roller; and a working roller to cause a portion of the grinding
belt to be in line contact with the surface of the stainless steel
coil, the working roller to move between the drive roller and the
driven roller to form the transverse hairlines.
3. The transverse hairline forming apparatus of claim 2, wherein
the working roller is disposed to reciprocate between a first
position adjacent to the drive roller and a second position
adjacent to the driven roller.
4. The transverse hairline forming apparatus of claim 3, wherein
the working roller allows the portion of the grinding belt to be in
line contact with the surface of the stainless steel coil when the
working roller moves from the first position to the second
position.
5. The transverse hairline forming apparatus of claim 3, wherein
the working roller of each of the at least one pair of surface
treatment units is disposed to move in opposite directions.
6. The transverse hairline forming apparatus of claim 2, wherein an
abrasive grain size of the grinding belt of each of the at least
one pair of surface treatment units is different from each
other.
7. The transverse hairline forming apparatus of claim 1, wherein
the at least one pair of surface treatment units comprises four
pairs of surface treatment units, each of the four pairs of surface
treatment units comprises a grinding belt, and an abrasive grain
size of the grinding belt of at least one pair of the surface
treatment units among the four pairs of surface treatment units is
different from the abrasive grain sizes of the grinding belts of
other surface treatment units.
8. The transverse hairline forming apparatus of claim 1, wherein
the stainless steel coil comprises a stainless steel coil on a
surface of which vertical hairlines are formed.
9. The transverse hairline forming apparatus of claim 1, wherein
the stainless steel coil comprises a stainless steel coil on a
surface of which is embossing processed.
10. A stainless steel coil comprising: a surface on which
transverse hairlines are processed by a transverse hairline forming
apparatus for a stainless steel coil, wherein the transverse
hairline forming apparatus for a stainless steel coil comprises, a
coil supporting unit to which a stainless steel coil is rotatably
disposed; a coil winding unit spaced apart from the coil supporting
unit, the coil winding unit holding and winding an end of the
stainless steel coil; and at least one pair of surface treatment
units disposed between the coil supporting unit and the coil
winding unit, the at least one pair of surface treatment units
configured to form transverse hairlines on a surface of the
stainless steel coil perpendicular to a winding direction of the
stainless steel coil, wherein, while the stainless steel coil is
unwound from the coil supporting unit and then is rewound on the
coil winding unit, when the stainless steel coil passes below the
at least one pair of surface treatment units, the at least one pair
of surface treatment units form the transverse hairlines on the
surface of the stainless steel coil.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY
[0001] This application claims priority from Korean Patent
Application No. 10-2015-0123494 filed Sep. 1, 2015 in the Korean
Intellectual Property Office, the disclosure of which is
incorporated herein by reference in its entirety.
TECHNICAL FIELD
[0002] The present disclosure relates to a stainless steel sheet
having transverse hairlines that is used in a refrigerator. More
particularly, the present disclosure relates to a transverse
hairline forming apparatus for a stainless coil that can form
transverse hairlines on a surface of a stainless steel sheet in a
coil unit and a stainless steel coil formed by the transverse
hairline forming apparatus.
BACKGROUND
[0003] The refrigerators have been widely used as a home appliance
for storing food in a frozen state or chilled state.
[0004] In general, a refrigerator is provided with a main body that
is formed in a substantially rectangular parallelepiped shape and a
front surface of which is opened so that food can be stored, and a
door formed to open and close a front opening of the main body.
[0005] These days, the refrigerators being used in households are
recognized as a prop in the interior and are required to
differentiate the exterior design of the refrigerator. In
particular, when the refrigerator is installed, the door of the
refrigerator is exposed to the outside so that it is important to
differentiate the design of the door of the refrigerator.
[0006] As an example of such a design, refrigerators the doors of
which are formed of a stainless steel sheet so that unique sheen
and texture of the stainless steel appear have been widely sold. In
particular, recently, stainless steel sheets which are
surface-treated so that hairlines appear on the surface thereof are
used for the production of the refrigerator door.
[0007] Stainless steel sheets having vertical hairlines are widely
used to manufacture the refrigerator door. Here, the vertical
hairlines refer to a surface treatment pattern formed in the height
direction of the refrigerator.
[0008] In FIG. 1, a refrigerator 100 having a door 110 that is
produced using a stainless steel sheet with the vertical hairlines
111 is illustrated.
[0009] In the refrigerator door 110 that is produced of the
stainless steel sheet with the vertical hairlines as illustrated in
FIG. 1, the brightness decreases and the irregular reflection
occurs. In particular, as illustrated in FIG. 2, there is a problem
that an irregular reflection phenomenon that is called as wave or
smile occurs in the upper end portion of the refrigerator door.
[0010] This problem may be solved if the refrigerator door 110 is
formed so that transverse hairlines appear on the front surface of
the refrigerator door 110. Here, the transverse hairlines refer to
a surface treatment pattern formed in the width direction of the
refrigerator 100. Accordingly, the transverse hairlines form a
right angle with the vertical hairlines 111 as described above.
[0011] An example of a conventional hairline forming apparatus 200
for forming hairlines on the stainless steel sheet is illustrated
in FIG. 3.
[0012] Referring to FIG. 3, a stainless steel coil 201 is rotatably
mounted on a coil supporting unit 210, and an end of the stainless
steel coil 201 is fixed to a coil winding unit 220 that is disposed
a predetermined distance away from the coil supporting unit 210.
Accordingly, when the coil winding unit 220 is rotated, a
strip-shaped stainless steel sheet constituting the stainless steel
coil 201 mounted on the coil supporting unit 210 is unwound, and
rewound on the coil winding unit 220.
[0013] At this time, three grinding belts 230 are provided above a
portion 203 of the stainless steel coil 201 that extends between
the coil supporting unit 210 and the coil winding unit 220. The
three grinding belts 230 are disposed perpendicular to a winding
direction (the direction of arrow A) of the stainless steel coil
201, and each of the three grinding belts 230 is rotatably
supported by a pair of rollers. In detail, each of the three
grinding belts 230 is disposed so that the rotating direction (the
direction of arrow D) of the grinding belt 230 is parallel to the
winding direction (the direction of arrow A) of the stainless steel
coil 201.
[0014] Each of the grinding belts 230 is formed to have a width W1
corresponding to a width W2 of the stainless steel coil 201.
Accordingly, when the grinding belts 230 are rotated, hairlines are
formed over the entire width of a portion 205 of the stainless
steel coil 201 that is in contact with the grinding belts 230. At
this time, since the stainless steel coil 201 is continuously moved
by the coil supporting unit 210 and the coil winding unit 220,
continuous hairlines 207 are formed on the surface of the stainless
steel coil 201 in the winding direction (the direction of arrow A)
of the stainless steel coil 201. At this time, the hairlines 207
are formed parallel to the winding direction (the direction of
arrow A) of the stainless steel coil 201.
[0015] Accordingly, if the height H of the refrigerator door 110 is
less than the width W2 of the stainless steel coil 201, it is
possible to form the refrigerator door 110 by using the stainless
steel coil 201 with the hairlines 207 formed in this way so that
the transverse hairlines appear on the surface of the refrigerator
door 110.
[0016] Side-by-side type of refrigerators, one-door type of
refrigerators, built-in refrigerators, etc. that are widely used
nowadays have a door the height of which is greater than 1250
mm.
[0017] However, since the maximum width of the stainless steel coil
201 that is commonly used is 1250 mm, when the height H of the
refrigerator door 110 is greater than 1250 mm, the refrigerator
door having the transverse hairlines cannot be created by using the
stainless steel coil 201 provided with the hairlines 207 that are
formed by using the hairline forming apparatus 200 as illustrated
in FIG. 3.
[0018] As a way to solve this problem, a method for manufacturing a
steel sheet for a refrigerator door (patent number; No. 10-0860645,
Filing date; 2007.05.04. Invention Title; a refrigerator, a steel
sheet for a refrigerator door, and a method for manufacturing the
same) has been proposed.
[0019] In the method of manufacturing a steel sheet for a
refrigerator door, a stainless steel coil is cut to a length
corresponding to the height of the refrigerator door, and then the
transverse hairlines is formed by polishing the surface of the cut
stainless steel sheet.
[0020] However, when the transverse hairlines are formed on the
stainless steel sheet provided by cutting the stainless steel coil
to a predetermined length, the stainless steel sheets that are cut
to a predetermined length need to be transported to post processes
for manufacturing the refrigerator door. Accordingly, the feeding
of the stainless steel sheets having the transverse hairlines into
the post processes for making the refrigerator door is expensive
and the handling of the stainless steel sheets is difficult. This
problem may be solved if the transverse hairlines are formed on the
stainless steel sheet in a coil state and the stainless steel sheet
having the transverse hairlines is transported in the coil
state.
[0021] Accordingly, the development of a hairline forming apparatus
which can form transverse hairlines in the coil state without
cutting the stainless steel coil has been required.
SUMMARY
[0022] The present disclosure has been developed in order to
overcome the above drawbacks and other problems associated with the
conventional arrangement. An aspect of the present disclosure
relates to a transverse hairline forming apparatus for a stainless
steel coil that can form transverse hairlines in a coil state
without cutting a stainless steel coil, and a stainless steel coil
formed by the same.
[0023] According to an aspect of the present disclosure, a
transverse hairline forming apparatus for a stainless steel coil
may include a coil supporting unit to which a stainless steel coil
is rotatably disposed; a coil winding unit spaced apart from the
coil supporting unit, the coil winding unit holding and winding an
end of the stainless steel coil; and at least one pair of surface
treatment units disposed between the coil supporting unit and the
coil winding unit, the at least one pair of surface treatment units
configured to form transverse hairlines on a surface of the
stainless steel coil perpendicular to a winding direction of the
stainless steel coil, wherein, while the stainless steel coil is
unwound from the coil supporting unit and then is rewound on the
coil winding unit, when the stainless steel coil passes below the
at least one pair of surface treatment units, the at least one pair
of surface treatment units form the transverse hairlines on the
surface of the stainless steel coil.
[0024] Each of the at least one pair of surface treatment units may
include a grinding belt of a caterpillar shape; a drive roller
disposed at an end of an inner side of the grinding belt, the drive
roller to rotate the grinding belt; a driven roller disposed at
another end of the inner side of the grinding belt, the driven
roller to support the grinding belt to be moved endlessly by the
drive roller; and a working roller to cause a portion of the
grinding belt to be in line contact with the surface of the
stainless steel coil, the working roller to move between the drive
roller and the driven roller to form the transverse hairlines.
[0025] The working roller may be disposed to reciprocate between a
first position adjacent to the drive roller and a second position
adjacent to the driven roller.
[0026] The working roller may allow the portion of the grinding
belt to be in line contact with the surface of the stainless steel
coil when the working roller moves from the first position to the
second position.
[0027] The working roller of each of the at least one pair of
surface treatment units may be disposed to move in opposite
directions.
[0028] An abrasive grain size of the grinding belt of each of the
at least one pair of surface treatment units may be different from
each other.
[0029] The at least one pair of surface treatment units may include
four pairs of surface treatment units, each of the four pairs of
surface treatment units may include the grinding belt, and an
abrasive grain size of the grinding belt of at least one pair of
the surface treatment units among the four pairs of surface
treatment units may be different from the abrasive grain sizes of
the grinding belts of other surface treatment units.
[0030] The stainless steel coil may include a stainless steel coil
on a surface of which vertical hairlines are formed.
[0031] The stainless steel coil may include a stainless steel coil
on a surface of which is embossing processed.
[0032] Other objects, advantages and salient features of the
present disclosure will become apparent from the following detailed
description, which, taken in conjunction with the annexed drawings,
discloses preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0033] These and/or other aspects and advantages of the present
disclosure will become apparent and more readily appreciated from
the following description of the embodiments, taken in conjunction
with the accompanying drawings of which:
[0034] FIG. 1 is a front view illustrating a refrigerator provided
with a door manufactured by using a stainless steel sheet having
vertical hairlines;
[0035] FIG. 2 is a partially front view illustrating wave that
appears on an upper end portion of the door of the refrigerator of
FIG. 1;
[0036] FIG. 3 is a perspective view conceptually illustrating a
conventional hairline forming apparatus for a stainless steel
coil;
[0037] FIG. 4 is a perspective view schematically illustrating a
transverse hairline forming apparatus for a stainless steel coil
according to an embodiment of the present disclosure;
[0038] FIG. 5 is a partially perspective view illustrating a
surface treatment unit of the transverse hairline forming apparatus
for a stainless steel coil of FIG. 4;
[0039] FIGS. 6A, 6B, and 6C are partially cross-sectional views
illustrating operations of a working roller of a surface treatment
unit of a transverse hairline forming apparatus for a stainless
steel coil according to an embodiment of the present
disclosure;
[0040] FIG. 7 is a perspective view illustrating a stainless steel
coil manufactured by a transverse hairline forming apparatus for a
stainless steel coil according to an embodiment of the present
disclosure;
[0041] FIG. 8 is a view illustrating a refrigerator including a
door that is manufactured by using a stainless steel sheet produced
by a transverse hairline forming apparatus for a stainless steel
coil according to an embodiment of the present disclosure;
[0042] FIG. 9 is a partial view illustrating a refrigerator door
that is manufactured by using a stainless steel sheet produced by a
transverse hairline forming apparatus for a stainless steel coil
according to an embodiment of the present disclosure; and
[0043] FIG. 10 is a partial view illustrating a refrigerator door
that is manufactured by using a stainless steel sheet produced by a
transverse hairline forming apparatus for a stainless steel coil
according to an embodiment of the present disclosure.
[0044] Throughout the drawings, like reference numerals will be
understood to refer to like parts, components and structures.
DETAILED DESCRIPTION
[0045] Hereinafter, certain exemplary embodiments of a transverse
hairline forming apparatus for a stainless steel coil according to
the present disclosure and a stainless steel coil manufactured by
this transverse hairline forming apparatus will be described in
detail with reference to the accompanying drawings.
[0046] The matters defined herein, such as a detailed construction
and elements thereof, are provided to assist in a comprehensive
understanding of this description. Thus, it is apparent that
exemplary embodiments may be carried out without those defined
matters. Also, well-known functions or constructions are omitted to
provide a clear and concise description of exemplary embodiments.
Further, dimensions of various elements in the accompanying
drawings may be arbitrarily increased or decreased for assisting in
a comprehensive understanding.
[0047] The terms "first", "second", etc. may be used to describe
diverse components, but the components are not limited by the
terms. The terms are only used to distinguish one component from
the others.
[0048] The terms used in the present application are only used to
describe the exemplary embodiments, but are not intended to limit
the scope of the disclosure. The singular expression also includes
the plural meaning as long as it does not differently mean in the
context. In the present application, the terms "include" and
"consist of" designate the presence of features, numbers, steps,
operations, components, elements, or a combination thereof that are
written in the specification, but do not exclude the presence or
possibility of addition of one or more other features, numbers,
steps, operations, components, elements, or a combination
thereof.
[0049] FIG. 4 is a perspective view schematically illustrating a
transverse hairline forming apparatus for a stainless steel coil
according to an embodiment of the present disclosure, and FIG. 5 is
a partially perspective view illustrating a surface treatment unit
of the transverse hairline forming apparatus for a stainless steel
coil of FIG. 4. FIGS. 6A, 6B, and 6C are partially cross-sectional
views illustrating operations of a working roller of a surface
treatment unit of a transverse hairline forming apparatus for a
stainless steel coil according to an embodiment of the present
disclosure.
[0050] Referring to FIGS. 4 and 5, a transverse hairline forming
apparatus for a stainless steel coil 1 according to an embodiment
of the present disclosure may include a coil supporting unit 10, a
coil winding unit 20, and four pairs of surface treatment units
30-1, 30-2, 30-3, and 30-4.
[0051] The coil supporting unit 10 is formed so that a stainless
steel coil 11 is rotatably mounted to the coil supporting unit 10.
Here, the stainless steel coil 11 refers to a predetermined length
of strip-shaped stainless steel sheet that is wound as illustrated
in FIG. 7 and is used to produce refrigerator doors. Accordingly, a
single stainless steel coil 11 is used to manufacture a plurality
of refrigerator doors.
[0052] The coil winding unit 20 is disposed to be spaced apart a
predetermined distance from the coil supporting unit 10, and is
formed to grasp and wind an end of the stainless steel coil 11
mounted to the coil supporting unit 10. Accordingly, the coil
winding unit 20 is provided with a rotational shaft (not
illustrated) that can grasp and rotate the end of the stainless
steel coil 11. When the rotational shaft of the coil winding unit
20 is rotated, the stainless steel coil 11 mounted to the coil
supporting unit 10 is unwound, and then is rewound on the coil
winding unit 20.
[0053] The coil supporting unit 10 and the coil winding unit 20 are
formed as the same as or similar to the coil supporting unit 210
and the coil winding unit 220 of the conventional hairline forming
apparatus 200; therefore, the detailed configuration thereof is
omitted.
[0054] The four pairs of surface treatment units 30-1, 30-2, 30-3,
and 30-4 are disposed between the coil supporting unit 10 and the
coil winding unit 20, and form transverse hairlines 12 on the
surface of the stainless steel coil 11 at right angles to a moving
direction of the stainless steel coil 11, that is, in the winding
direction (the direction of arrow A) of the stainless steel coil
11. In detail, while the stainless steel coil 11 mounted to the
coil supporting unit 10 is being unwound and then is being rewound
by the coil winding unit 20, the four pairs of surface treatment
units 30-1, 30-2, 30-3, and 30-4 form the transverse hairlines 12
on portions of the surface of the stainless steel coil 11 with
which the four pairs of surface treatment units 30-1, 30-2, 30-3,
and 30-4 are in contact, respectively. When the stainless steel
coil 11 has passed through all of the four pairs of surface
treatment units 30-1, 30-2, 30-3, and 30-4, the transverse
hairlines 12 are completed on the surface of the stainless steel
coil 11.
[0055] Since each of the four pairs of surface treatment units
30-1, 30-2, 30-3, and 30-4 includes two surface treatment units,
the transverse hairline forming apparatus for a stainless steel
coil 1 according to an embodiment of the present disclosure as
illustrated in FIG. 4 includes a total of eight surface treatment
units 31, 32, 33, 34, 35, 36, 37, and 38. Hereinafter, for
convenience of description, a surface treatment unit that is
closest to the coil supporting unit 10 among the eight surface
treatment units 31, 32, 33, 34, 35, 36, 37, and 38 is referred to
as a first surface treatment unit 31, and the remaining surface
treatment units are sequentially referred to as a second surface
treatment unit 32, a third surface treatment unit 33, a fourth
surface treatment unit 34, a fifth surface treatment unit 35, a
sixth surface treatment unit 36, a seventh surface treatment unit
37, and an eighth surface treatment unit 38 in the winding
direction of the stainless steel coil 11. Accordingly, the surface
treatment unit closest to the coil winding unit 20 is the eighth
surface treatment unit 38.
[0056] Also, the first and second surface treatment units 31 and 32
constitute a first pair of surface treatment units 30-1. The third
and fourth surface treatment units 33 and 34 constitute a second
pair of surface treatment units 30-2. The fifth and sixth surface
treatment units 35 and 36 constitute a third pair of surface
treatment units 30-3. The seventh and eighth surface treatment
units 37 and 38 constitute a fourth pair of surface treatment units
30-4.
[0057] Since the eight surface treatment units 31, 32, 33, 34, 35,
36, 37, and 38 are formed in the same structure, in the following,
the structure of the eighth surface treatment unit 38 will be
described in detail with reference to FIG. 5. The structure of each
of the first to seventh surface treatment units 31, 32, 33, 34, 35,
36, and 37 is the same as the structure of the eighth surface
treatment unit 38.
[0058] The eighth surface treatment unit 38 (hereinafter, referred
to as a surface treatment unit) may include a grinding belt 41, a
drive roller 42, a driven roller 43, and a working roller 45.
[0059] The grinding belt 41 is formed in a caterpillar shape
forming a closed curve. The drive roller 42 and the drive roller 42
are disposed in the inner side of the grinding belt 41. The
grinding belt 41 is disposed perpendicular to the winding direction
(the direction of arrow A) of the stainless steel coil 11.
Accordingly, the rotational direction (the direction of arrow B) of
the grinding belt 41 forms a right angle with the winding direction
(the direction of arrow A) of the stainless steel coil 11.
[0060] The outer surface of the grinding belt 41 is provided with
an abrasive which can process the surface of the stainless steel
coil 11 so as to form the transverse hairlines 12. The grain size
of the abrasive of the grinding belt 41 may be approximate
80.about.400 mesh.
[0061] The drive roller 42 is disposed at an end of the inner side
of the grinding belt 41, and generates a driving force to rotate
the grinding belt 41. The drive roller 42 may be formed as a
built-in motor structure. Alternatively, the drive roller 42 may be
formed to be rotated by receiving power from an outside motor as
not illustrated.
[0062] The driven roller 43 is disposed at the other end of the
inner side of the grinding belt 41, and supports the grinding belt
41 to be rotated by the drive roller 42. Accordingly, when the
drive roller 42 rotates, the grinding belt 41 is supported and
endlessly moved by the drive roller 42 and the driven roller
43.
[0063] The working roller 45 is disposed between the drive roller
42 and the driven roller 43 in the inner side of the grinding belt
41. The working roller 45 is formed to cause a portion of the
grinding belt 41 to be in line contact with the surface of the
stainless steel coil 11 that passes below the grinding belt 41,
thereby forming the transverse hairlines 12 on the surface of the
stainless steel coil 11. Accordingly, the entire surface 41-1 (see
FIGS. 6A, 6B, and 6C) of the grinding belt 41 facing the stainless
steel coil 11 is not in contact with the stainless steel coil 11,
but a portion 41-2 (see FIGS. 6A, 6B, and 6C) of the grinding belt
41 which is pressed by the working roller 45 is in contact with the
surface of the stainless steel coil 11.
[0064] The working roller 45 is disposed to reciprocately move
between the drive roller 42 and the driven roller 43. In detail, if
a position of the working roller 45 that is close to one side end
of the stainless steel coil 11 adjacent to the drive roller 42 is
referred to as a first position P1 and a position of the working
roller 45 that is close to the other side end of the stainless
steel coil 11 adjacent to the driven roller 43 is referred to as a
second position P2, the working roller 45 is disposed to
reciprocately move between the first position P1 and the second
position P2. In other words, the working roller 45 is disposed to
reciprocate linearly between the first position P1 adjacent to the
drive roller 42 and the second position P2 adjacent to the driven
roller 43. Accordingly, the moving direction (the direction of
arrow C) of the working roller 45 forms a right angle with the
winding direction (the direction of arrow A) of the stainless steel
coil 11.
[0065] The working roller 45 may be disposed to be inclined by a
predetermined angle with respect to a virtual axis (hereinafter,
referred to as a vertical axis) parallel to the moving direction
(the direction of arrow C) of the working roller 45 that is
perpendicular to the winding direction (the direction of arrow A)
of the stainless steel coil 11 so as to form the transverse
hairlines 12 perpendicular to the winding direction (the direction
of arrow A) of the stainless steel coil 11 on a portion of the
moving stainless steel coil 11. An inclination angle of the working
roller 45 with respect to the vertical axis may be appropriately
determined according to a moving speed of the stainless steel coil
11, that is, a winding speed of the stainless steel coil 11, a
moving speed of the working roller 45, etc. To this end, the
working roller 45 may be disposed so that a user can adjust the
inclination angle with respect to the vertical axis.
[0066] In the case that the working roller 45 is moved to form the
transverse hairlines 12 while the stainless steel coil 11 is
moving, both when the working roller 45 is moved from the first
position P1 to the second position P2 and when the working roller
45 is moved from the second position P2 to the first position P1,
the working roller 45 may be moved to cause the grinding belt 41 to
maintain contact with the stainless steel coil 11.
[0067] At this time, the working roller 45 of each of the two
surface treatment units 31-32, 33-34, 35-36, and 37-38 in the pair
may be configured to perform a surface treatment operation while
moving in the same direction.
[0068] As another example, the working roller 45 of each of the two
surface treatment units 31-32, 33-34, 35-36, and 37-38 in the pair
may be configured to perform the surface treatment operation while
moving in opposite directions to each other. For example, when the
working roller 45 of the eighth surface treatment unit 38 is
positioned in the first position P1, the seventh surface treatment
unit 37 that forms a pair with the eighth surface treatment unit 38
is configured to be positioned in the second position P2. With this
configuration, when the working roller 45 of the eighth surface
treatment unit 38 performs the surface treatment of the stainless
steel coil 11 while moving from the first position P1 to the second
position P2, the working roller 45 of the seventh surface treatment
unit 37 performs the surface treatment while moving from the second
position P2 to the first position P1. Accordingly, the working
roller 45 of the seventh surface treatment unit 37 and the working
roller 45 of the eighth surface treatment unit 38 perform the
surface treatment moving in opposite directions to each other,
thereby forming the transverse hairlines 12.
[0069] The abrasive grain size of the grinding belt 41 of each of
the eight surface treatment units 31, 32, 33, 34, 35, 36, 37, and
38 may be formed differently. Alternatively, the abrasive grain
size of the grinding belt 41 of some of the eight surface treatment
units 31, 32, 33, 34, 35, 36, 37, and 38 may be formed
identically.
[0070] Also, the abrasive grain sizes of the grinding belts 41 of
the two surface treatment units 31-32, 33-34, 35-36, and 37-38 in
the pair may be identically formed. For example, the grinding belts
41 of the first and second surface treatment units 31 and 32
included in the first pair 30-1 may be configured to have the same
abrasive grain size. Further, the grinding belts 41 of the third
and fourth surface treatment units 33 and 34 included in the second
pair 30-2, the grinding belts 41 of the fifth and sixth surface
treatment units 35 and 36 included in the third pair 30-3, and the
grinding belts 41 of the seventh and eighth surface treatment units
37 and 38 included in the fourth pair 30-4 may have the same
abrasive grain size, respectively.
[0071] The abrasive grain size of the grinding belt 41 of each of
the four pairs of surface treatment units 30-1, 30-2, 30-3, and
30-4 may be defined within a certain range so that the transverse
hairlines 12 are completed on the surface of the stainless steel
coil 11 after passing through all of the four pairs of surface
treatment units 30-1, 30-2, 30-3, and 30-4.
[0072] For example, in the embodiment as illustrated in FIG. 4, the
grinding belts 41 of the first pair of surface treatment units 30-1
may have the abrasive grain size of about 80 to 120 mesh. The
grinding belts 41 of the second pair of surface treatment units
30-2 may have the abrasive grain size of about 80 to 120 mesh. The
grinding belts 41 of the third pair of surface treatment units 30-3
may have the abrasive grain size of about 80 to 150 mesh. The
grinding belts 41 of the fourth pair of surface treatment units
30-4 may have the abrasive grain size of about 120 to 400 mesh.
[0073] At this time, the four pairs of surface treatment units
30-1, 30-2, 30-3, and 30-4 may be configured to have a higher
abrasive grain size sequentially in the winding direction (the
direction of arrow A) of the stainless steel coil 11. For example,
the abrasive grain size of the grinding belt 41 of the first pair
of surface treatment units 30-1 may be determined to be 90 mesh,
the abrasive grain size of the grinding belt 41 of the second pair
of surface treatment units 30-2 may be determined to be 100 mesh,
the abrasive grain size of the grinding belt 41 of the third pair
of surface treatment units 30-3 may be determined to be 120 mesh,
and the abrasive grain size of the grinding belt 41 of the fourth
pair of surface treatment units 30-4 may be determined to be 140
mesh.
[0074] Also, at least one pair of the four pairs of surface
treatment units 30-1, 30-2, 30-3, and 30-4 may be formed to have
the abrasive grain size different from the abrasive grain size of
the grinding belt 41 of the other pairs of surface treatment units.
For example, the grinding belts 41 of the first pair, the second
pair, and third pair of surface treatment units 30-1, 30-2, and
30-3 may be configured to have the same abrasive grain size, and
only the grinding belt 41 of the fourth pair of surface treatment
units 30-4 may be configured to have the abrasive grain size higher
than those of the grinding belts 41 of the three pairs of surface
treatment units 30-1, 30-2, and 30-3.
[0075] The abrasive grain sizes of the grinding belts 41 of the
four pairs of surface treatment units 30-1, 30-2, 30-3, and 30-4
may be properly determined depending on a kind of the stainless
steel coil 11, a desired state of the transverse hairlines 12, a
winding speed of the stainless steel coil 11, a moving speed of the
working roller 45, a rotation speed of the grinding belt 41,
etc.
[0076] The controller 50 controls the coil winding unit 20, and the
drive roller 42 and working roller 45 of each of the eight surface
treatment units 31, 32, 33, 34, 35, 36, 37, and 38. Accordingly,
the controller 50 may be configured to control the speed at which
the coil winding unit 20 winds the stainless steel coil 11, and the
moving speed and the moving direction of the working roller 45 and
the rotation speed of the drive roller 42 of each of the eight
surface treatment units 31, 32, 33, 34, 35, 36, 37, and 38.
[0077] Although not illustrated in FIG. 4, a support member that
supports a portion 13 of the stainless steel coil 11 which is
located between the coil supporting unit 10 and the coil winding
unit 20 may be disposed below the stainless steel coil 11 between
the coil supporting unit 10 and the coil winding unit 20. The
support member may be formed to support a force which is applied to
the stainless steel coil 11 when the transverse hairlines 12 are
formed on the surface of the stainless steel coil 11 by the working
rollers 45 of the four pairs of surface treatment units 30-1, 30-2,
30-3, and 30-4, thereby preventing the stainless steel coil 11 from
sagging.
[0078] Hereinafter, operation of the transverse hairline forming
apparatus for stainless steel coil 1 according to an embodiment of
the present disclosure having the above-described structure will be
described in detail with reference to FIGS. 4, 5, 6A, 6B, and
6C.
[0079] First, a stainless steel coil 11 to be processed is mounted
to the coil supporting unit 10, and an end of the stainless steel
coil 11 mounted to the coil supporting unit 10 is fixed to the coil
winding unit 20. When operating the coil winding unit 20 in this
state, the stainless steel coil 11 mounted to the coil supporting
unit 10 is unwound, and then rewound on the coil winding unit
20.
[0080] At this time, the transverse hairlines 12 are formed on the
surface of the stainless steel coil 11' being wound on the coil
winding unit 20 by the eight grinding belts 41 and working rollers
45 while the stainless steel coil 11 is passing below the four
pairs of surface treatment units 30-1, 30-2, 30-3, and 30-4.
[0081] In detail, after the working roller 45 presses the grinding
belt 41 in the first position P1 as illustrated in FIG. 6A so that
a portion 41-2 of the grinding belt 41 is in line contact with the
stainless steel coil 11, the working roller 45 is moved to the
second position P2 as illustrated in FIG. 6C in a state in which
the grinding belt 41 is in line contact with the stainless steel
coil 11, and thus the transverse hairlines 12 are formed on the
surface of the stainless steel coil 11. FIG. 6B illustrates a state
in which the working roller 45 is being moved, and the working
roller 45 is located in approximately midway between the first
position P1 and the second position P2.
[0082] When the working roller 45 forms the transverse hairlines 12
while moving from the first position P1 to the second position P2,
the grinding belt 41 is rotated in one direction by the drive
roller 42 so that the grinding belt 41 which is positioned between
the working roller 45 and the stainless steel coil 11 also is
moved. Accordingly, while the working roller 45 is moving from the
first position P1 to the second position P2, a portion 41-2 of the
grinding belt 41 that is in contact with the stainless steel coil
11 is continuously changed to form the transverse hairlines 12 on
the surface of the stainless steel coil 11. Accordingly, since the
surface treatment of the stainless steel coil 11 is performed by
the portion 41-2 of the grinding belt 41 which is continuously
changed, the transverse hairlines 12 may be effectively formed.
[0083] After the working roller 45 arrives at the second position
P2, the working roller 45 moves back to the first position P1, and
causes the grinding belt 41 to be in line contact with the
stainless steel coil 11, thereby forming the transverse hairlines
12.
[0084] As illustrated in FIG. 4, since the transverse hairline
forming apparatus for a stainless steel coil 1 according to an
embodiment of the present disclosure is configured so that the four
pairs of surface treatment units 30-1, 30-2, 30-3, and 30-4 are
provided with the grinding belts 41 the abrasive grain sizes of
which are higher in sequence, the desired transverse hairlines 12
are completed after the stainless steel coil 11 is moved in the
winding direction (the direction of arrow A) and passes by the
fourth pair of surface treatment units 30-4.
[0085] Accordingly, in the transverse hairline forming apparatus
for a stainless steel coil 1 according to an embodiment of the
present disclosure, while the coil winding unit 20 is winding the
stainless steel coil 11, the transverse hairlines 12 are
continuously formed on the surface of the stainless steel coil 11
by the eight surface treatment units 31, 32, 33, 34, 35, 36, 37,
and 38.
[0086] In the transverse hairline forming apparatus for a stainless
steel coil 1 according to an embodiment of the present disclosure,
when rewinding the stainless steel coil 11 mounted on the coil
supporting unit 10 on the coil winding unit 20 is completed, the
processing of the transverse hairlines 12 on the surface of the
strip-shaped stainless steel sheet to form the stainless steel coil
11 is completed. Accordingly, the stainless steel coil 11' provided
with the transverse hairlines 12 as illustrated in FIG. 7 may be
obtained.
[0087] In the above description, the eight surface treatment units
31, 32, 33, 34, 35, 36, 37, and 38 form the transverse hairlines 12
on the surface of the stainless steel coil 11 while the stainless
steel coil 11 is still wound. However, as another embodiment, the
transverse hairlines 12 may be formed in a state in which the
stainless steel coil 11 is stopped.
[0088] In the case of the present embodiment, the configuration of
a transverse hairline forming apparatus for a stainless steel coil
is the same as that of the transverse hairline forming apparatus
for a stainless steel coil 1 as illustrated in FIG. 4, but the
control method thereof is different. Also, in the case of this
embodiment, because the transverse hairlines 12 are formed in a
state in which the stainless steel coil 11 is stationary, the
working roller 45 is disposed parallel to the winding direction
(the direction of arrow A) of the stainless steel coil 11.
[0089] The controller 50 controls the coil winding unit 20 so that
the coil winding unit 20 intermittently operates to wind a
predetermined length of the stainless steel coil 11 and then
stops.
[0090] For example, in the state in which the stainless steel coil
11 is stationary, the controller 50 controls the eight surface
treatment units 31, 32, 33, 34, 35, 36, 37, and 38 so that the
drive rollers 42 are rotated to cause the grinding belts 41 to
perform the endless movement and the working rollers 45 are moved
from the first position P1 to the second position P2. Thus, the
grinding belt 41 is in line contact with the surface of the
stainless steel coil 11 by the working roller 45, thereby forming
the transverse hairlines 12 on the surface of the stainless steel
coil 11.
[0091] When the working roller 45 arrives at the second position
P2, the controller 50 stops the rotation of the drive roller 42,
and then returns the working roller 45 to the first position P1. At
this time, the working roller 45 is lifted a certain distance to be
prevented from pressing the grinding belt 41 against the stainless
steel coil 11. Accordingly, when the working roller 45 is returned
from the second position P2 to the first position P1, the
transverse hairlines 12 are not formed.
[0092] When the working roller 45 is moved from the second position
P2 to the first position P1, the controller 50 controls the coil
winding unit 20 to wind the stainless steel coil 11 a predetermined
length. At this time, the predetermined length of the wound
stainless steel coil 11 is a length of the stainless steel coil 11
on which the transverse hairlines 12 are formed by the eighth
surface treatment unit 38. The length may be approximately equal to
the width W3 of the grinding belt 41.
[0093] After winding the stainless steel coil 11 the predetermined
length by controlling the coil winding unit 20, the controller 50
stops the coil winding unit 20 so that the stainless steel coil 11
is not moved. After that, the controller 50 again controls the
drive rollers 42 and the working rollers 45 to form the transverse
hairlines 12 on the surface of the stainless steel coil 11.
[0094] The controller 50 may repeat the surface treatment operation
and the winding operation of the stainless steel coil 11 as
described above to continuously form the transverse hairlines 12 on
the surface of the stainless steel coil 11.
[0095] In the above description, the transverse hairlines 12 are
processed on the surface of the stainless steel coil 11 by using
the four pairs of surface treatment units 30-1, 30-2, 30-3, and
30-4, that is, the eight surface treatment units 31, 32, 33, 34,
35, 36, 37, and 38. However, this is only one example. The
transverse hairline forming apparatus for a stainless steel coil 1
according to an embodiment of the present disclosure may be
configured to form the transverse hairlines 12 using at least one
pair of surface treatment unit, that is, at least two surface
treatment units or five or more pairs of surface treatment units,
that is, ten or more surface treatment units.
[0096] With the transverse hairline forming apparatus for a
stainless steel coil 1 according to an embodiment of the present
disclosure as described above, because the transverse hairlines 12
can be formed on the strip-shaped stainless steel sheet without
cutting the stainless steel coil 11, it is possible to obtain a
stainless steel coil 11' on the surface of which the transverse
hairlines 12 are formed. Accordingly, because the stainless steel
sheet to be a basic plate of the refrigerator door can be moved in
a coil unit for the post processes for manufacturing the
refrigerator door, for example, an additional surface treatment
process, a molding process, etc., the transportation is more
convenient, the handling is easier, and the logistics cost is
reduced compared to the prior art in which the cut stainless steel
sheets with the transverse hairlines are transported.
[0097] A side by side type of refrigerator 300 provided with a door
310 which is manufactured using the stainless steel coil 11' as
illustrated in FIG. 7 on which the transverse hairlines 12 are
formed by the transverse hairline forming apparatus for a stainless
steel coil 1 according to an embodiment of the present disclosure
is illustrated in FIG. 8.
[0098] Referring to FIG. 8, on the surface of the door 310 of the
refrigerator 300, the transverse hairlines 12 are formed in a width
direction of the refrigerator 300. When the transverse hairlines 12
are formed on the surface of the door 310 of the refrigerator 300
as described above, the irregular reflection phenomenon, which is
called as wave, smile, and the like, may not occur in the upper end
portion of the door 310 differently from the refrigerator door 110
having the vertical hairlines 111 as illustrated in FIG. 1.
[0099] In the above description, the transverse hairline forming
apparatus for a stainless steel coil 1 according to an embodiment
of the present disclosure forms the transverse hairlines 12 on the
surface of the stainless steel coil 11 in which there is no
pattern.
[0100] However, the transverse hairline forming apparatus for a
stainless steel coil 1 according to an embodiment of the present
disclosure may form the transverse hairlines on the surface of the
stainless steel coil on which a pattern is formed.
[0101] For example, the transverse hairlines may be formed on the
stainless steel coil 201 on which the vertical hairlines 207 are
formed by the conventional hairline forming apparatus 200 of FIG. 3
using the transverse hairline forming apparatus for a stainless
steel coil 1 according to an embodiment of the present disclosure.
So, a pattern in which the vertical hairlines and the transverse
hairlines cross each other may be obtained.
[0102] An example of a refrigerator door 310' having the pattern in
which the transverse hairlines and the vertical hairlines cross is
illustrated in FIG. 9.
[0103] As another example, the transverse hairline forming
apparatus for a stainless steel coil 1 according to an embodiment
of the present disclosure may form the transverse hairlines on the
surface of a stainless steel coil on which an embossing pattern is
formed by an embossing process. Thus, a pattern in which the
embossing pattern is combined with the transverse hairlines may be
obtained.
[0104] An example of a refrigerator door 310'' having the pattern
in which the embossing pattern is combined with the transverse
hairlines is illustrated in FIG. 10. However, the embossing pattern
as illustrated in FIG. 10 is only one example. A variety of
embossing patterns may be applied to the refrigerator door.
[0105] While the embodiments of the present disclosure have been
described, additional variations and modifications of the
embodiments may occur to those skilled in the art once they learn
of the basic inventive concepts. Therefore, it is intended that the
appended claims shall be construed to include both the above
embodiments and all such variations and modifications that fall
within the spirit and scope of the inventive concepts.
* * * * *