Pressing roll device and pressing method
A pressing roll device, in which a unit cell passes between an upper roll and a lower roll, includes: the lower roll; the upper roll; a lower mount on which the lower roll is mounted and which is fixed in movement; an upper mount on which the upper roll is mounted and which is restricted by a bracket so as to ascend and descend by the bracket; and a stopper disposed between the lower mount and the upper mount so that the lower roll and the upper roll are spaced apart from each other.
1 . A pressing roll device, in which a unit cell passes between an upper roll and a lower roll, the pressing roll device comprising:
the lower roll;
the upper roll;
a lower mount on which the lower roll is mounted and which is fixed in movement;
a bracket having an internal space, and positioned above the lower mount;
an upper mount on which the upper roll is mounted and which is restricted by the bracket so as to ascend and descend by the bracket; and
a stopper disposed between the lower mount and the upper mount so that the lower roll and the upper roll are spaced apart from each other,
wherein the upper mount comprises a head part protruding from a top surface of the upper mount,
wherein the head part comprises a body portion protruding vertically from the top surface of the upper mount and an expansion portion, the expansion portion having a diameter greater than the body portion, at an upper end of the body portion,
wherein the head part is coupled to the bracket and the expansion portion of the head part is accommodated in the internal space of the bracket so that separation of the expansion portion is restricted by a clamping portion of the bracket,
wherein, the upper mount ascends and descends in a state in which the head part is restricted and travels within the internal space between an upper surface of the internal space and a lower surface of the internal space which corresponds to a range in which a bottom surface of the clamping portion contacts the top surface of the upper mount and a top surface of the clamping portion contacts a bottom surface of the expansion portion, respectively,
wherein the body portion includes at least two parts that extends parallel to each other,
wherein the two parts of the body portion are respectively connected to the upper mount, and
wherein the upper mount includes a gap between locations where the two parts of the body portion are respectively connected to the upper mount.
2 . The pressing roll device of claim 1 , wherein, when the upper mount is seated on the stopper, a gap occurs between the clamping portion and the expansion portion and between the clamping portion and the top surface of the upper mount so that the head part is located between the upper surface of the internal space and the lower surface of the internal space.
3 . The pressing roll device of claim 1 , wherein the bracket is connected to a motor to ascend and descend according to a rotation direction of the motor.
4 . The pressing roll device of claim 1 , wherein a damping member that buffers an impact when the upper mount is seated is mounted on the stopper.
5 . The pressing roll device of claim 1 , wherein the stopper has a bar shape that is erected from the lower mount and is expandable and contractible in a longitudinal direction to adjust a spaced distance between the lower mount and the upper mount.
6 . The pressing roll device of claim 5 , wherein the stopper comprises:
a fixed part fixedly disposed on the lower mount; and
a sliding part that is slidable to ascend and descend in the longitudinal direction from the fixed part.
7 . A pressing method using the pressing roll device of claim 1 that includes the unit cell that passes to be pressed between the upper roll and the lower roll, the pressing method comprising:
an operation of passing the unit cell between the lower roll mounted on the lower mount that is fixed in movement and the upper roll mounted on the upper mount which is capable of ascending and descending in a state in which separation from the bracket is restricted,
wherein, when the unit cell passes between the upper roll and the lower roll, the upper roll and the lower roll are spaced a predetermined distance from each other.
8 . The pressing method of claim 7 , wherein, when the unit cell passes between the upper roll and the lower roll, a pressure is applied to the unit cell by self-weights of the upper mount and the upper roll.
9 . The pressing method of claim 8 , wherein, when the unit cell having a predetermined thickness passes between the upper roll and the lower roll, only the self-weights of the upper mount and the upper roll act as the pressure applied to the unit cell, wherein if the unit cell having a thickness greater than the predetermined thickness passes between the upper roll and the lower roll, force applied from the bracket in addition to the self-weights of the upper mount and the upper roll is added to act as the pressure applied to the unit cell.
10 . The pressing method of claim 7 , further comprising a step of mounting a stopper between the lower mount and the upper mount before the unit cell passes therethrough so that the lower roll and the upper roll are spaced apart from each other.
11 . A unit cell manufactured through the pressing method of claim 7 .
12 . The pressing roll device of claim 1 , wherein the clamping portion of the bracket is interposed between the top surface of the upper mount and the bottom surface of the expansion portion.
13 . The pressing roll device of claim 1 , wherein the clamping portion of the bracket defines a lower part of the internal space of the bracket.
14 . The pressing roll device of claim 1 , wherein the clamping portion has a first part and a second part that are separate from each other horizontally along the top surface of the upper mount, and
wherein the body portion extends vertically between the first part and the second part of the clamping portion.
15 . The pressing roll device of claim 1 , wherein the expansion portion of the head part is in a single piece that extends across substantially an entire width of the internal space.
16 . The pressing roll device of claim 1 ,
wherein the two parts of the body portion are directly connected to the head part.