KR20200011227A - Slot die coater adjusting device for adjusting the distance between the upper discharge port and the lower discharge port of the slot die coater and Electrode active material coating system comprising the same - Google Patents

Abstract

A slot die coater adjustment device according to the present invention is configured to adjust the distance between an upper discharge port and a lower discharge port of a slot die coater by moving an upper die of the slot die coater forward and backward. To this end, the slot die coater adjustment device comprises a coater holding unit, a horizontal moving unit, and a vertical pressing unit.

Description

Slot die coater adjusting device for adjusting the distance between the upper discharge port and the lower discharge port of the slot die coater, and an electrode active material coating system comprising the same (Slot die coater adjusting device for adjusting the distance between the upper discharge port and the lower discharge port of the slot die coater and Electrode active material coating system comprising the same}

The present invention relates to a slot die coater adjusting device and a slot die coater adjusting system including the same. More specifically, the upper die of the slot die coater is moved forward and backward to adjust a distance between the upper discharge hole and the lower discharge hole of the slot die coater. A slot die coater adjusting device configured to be adjustable and an electrode active material coating system including the same.

As the development and demand for mobile devices increase, the demand for secondary batteries as energy sources is rapidly increasing, and these secondary batteries essentially include an electrode assembly, which is a power generation element.

The electrode assembly has a form in which a positive electrode, a separator, and a negative electrode are stacked at least once, and the positive electrode and the negative electrode are manufactured by coating and drying a positive electrode active material slurry and a negative electrode active material slurry on an electrode current collector made of aluminum foil and copper foil, respectively. .

In order to make the charge and discharge characteristics of the secondary battery uniform, the positive electrode active material slurry and the negative electrode active material slurry should be evenly coated on the current collector, and for this purpose, a slot die coating process is usually performed.

1 shows a schematic diagram of a slot die coating process. Referring to FIG. 1, the coating apparatus 10 includes a slot die coater 20 and a coating roll 40 through which an electrode active material slurry is discharged, and the current collector 50 is rotated while rotating the coating roll 40. The active material is coated on the phase.

The electrode active material slurry discharged from the slot die coater 20 is widely applied to one surface of the current collector 50 to form an electrode active material layer.

In some cases, an electrode active material slurry forming another layer may be additionally applied on the electrode active material layer forming one layer to form two electrode active material layers. To form these two electrode active material layers, a slot die coater 70 is typically used that includes three die blocks 71, 72, 73 as shown in FIG. 2. The slot die coater 70 of this type is formed on the electrode active material layer formed by the electrode active material slurry first applied by simultaneously discharging the electrode active material slurry through two discharge holes 74 and 75 formed between adjacent die blocks. Additional electrode active material slurry can be applied continuously to the.

However, in the process using the slot die coater 70, since the electrode active material slurry discharged simultaneously from different discharge ports 74 and 75 must be used, it is difficult to form each electrode active material layer to a desired thickness. There is this.

In general, the thickness of each electrode active material layer is influenced by the discharge amount of the electrode active material slurry through the discharge ports 74 and 75, and the discharge amount of the electrode active material slurry is controlled at intervals between the respective die blocks 71, 72 and 73. Since it is greatly influenced, in order to produce a desired thickness, a test process is performed several times to disassemble and reassemble each die block 71, 72, and 73 to adjust the gap, and to check the discharge amount again. It is required to repeat this.

However, in the conventional slot die coater 70, since the three die blocks 71, 72, 73 are sequentially coupled to each other to form two discharge ports 74, 75, any one discharge port 74 , The separation of all die blocks 71, 72, and 73 may be necessary to adjust the spacing of the two dies, and the separation of only one die block may affect the position of the remaining die blocks. 74, 75) is difficult to adjust individually.

Furthermore, repeating the separation and reassembly of the die block and carrying out the test coating several times causes a delay in the process time and also increases the consumption of the electrode active material slurry, which is a material, which greatly reduces the overall efficiency of the process. On the other hand, repeated disassembly and assembly may adversely affect the life of the slot die coater.

Accordingly, the development of a slot die coater having an improved structure capable of solving such a problem, that is, a slot die coater having a structure capable of adjusting the distance between the upper discharge hole and the lower discharge hole by the relative movement of the upper die and the lower die, and the slot die coater There is an urgent need for the development of a slot die coater adjusting device configured to adjust a distance between an upper coater and a lower coater.

The present invention was conceived in view of the above-described problems, and aims to adjust the distance between the upper discharge port and the lower discharge port by allowing the upper die of the slot die coater to slide along an inclined surface at an angle with respect to the ground. do.

In particular, the present invention, even if a force in a direction parallel to the ground, by applying a force in a direction perpendicular to the inclined surface through the direction change of the force in accordance with the application of the bearing by the upper die along the direction parallel to the inclined surface One object is to be able to move smoothly.

However, the technical problem to be solved by the present invention is not limited to the above-described problem, another task that is not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

An apparatus for adjusting a slot die coater according to an embodiment of the present invention for solving the above problems includes an upper portion including a lower die having a lower discharge port for discharging a first active material slurry and an upper discharge hole for discharging a second active material slurry In the slot die coater including a die to adjust the distance between the lower discharge port and the upper discharge port by moving the upper die, which is fixed to the upper die, transverse between the longitudinal one end and the other end of the slot die coater A coater holding unit extending outwardly of the slot die coater; It is provided on one side and the other side in the longitudinal direction of the slot die coater, and disposed further rearward than the coater holding unit, and is driven in a direction from the rear of the slot die coater to the front in contact with the coater holding unit to operate the coater holding unit. A horizontal moving unit configured to pressurize or drive in the opposite direction to release pressurization; And provided at one side and the other side in the longitudinal direction of the slot die coater, respectively, disposed in front of the coater holding unit and contacting the coater holding unit to press the coater holding unit in a direction from the top to the bottom of the slot die coater. Vertical pressurizing unit; It includes.

The coater holding unit may include: a holding beam fixed to the upper die and extending to an outer side of the slot die coater across between the longitudinal one end and the other end of the slot die coater; A rear oblique plate provided at one end of the holding beam in the longitudinal direction and the other end thereof, the rear oblique plate being provided on a rear surface of the holding beam in front and rear directions toward the horizontal moving unit; And a front oblique plate provided at one side of the holding beam in the longitudinal direction and the other end thereof, the front oblique plate being provided on a front surface of the holding beam in both front and rear directions toward the vertical pressing unit; It may include.

The lower die and the upper die of the slot die coater have an inclined surface at an angle to the ground at a predetermined angle, and the rear slanted plate and the front slanted plate are respectively formed to be parallel to a surface perpendicular to the opposed surface. And a forward inclined portion.

The horizontal moving unit may include a rear bearing assembly in contact with the rear inclined portion, and the vertical pressing unit may include a front bearing assembly in contact with the front inclined portion.

The horizontal moving unit, the base block having an LM guide on the upper surface; A reducer fixed on the base block; And a horizontal moving block connected to the reducer and moving forward and backward along the LM guide by the operation of the reducer, the rear bearing assembly being coupled to one side thereof. It may further include.

The vertical pressurizing unit includes a vertical pressurizing cylinder; And a vertical pressurizing block connected to the vertical pressurizing cylinder to receive downward force by the operation of the vertical pressurizing cylinder, and the front bearing assembly coupled to one side thereof. It may further include.

On the other hand, the electrode active material coating system according to an embodiment of the present invention for solving the above problems, the lower die having a lower discharge port for discharging the first active material slurry and the upper discharge hole for discharging the second active material slurry A slot die coater comprising an upper die; A coater holding unit fixed to the upper die and extending to the outside of the slot die coater across between the longitudinal one end and the other end of the slot die coater; It is provided on one side and the other side of the slot die coater in the longitudinal direction, respectively, disposed more rearward than the coater holding unit, the contact with the coater holding unit is driven in a direction from the rear of the slot die coater to the front to move the coater holding unit A horizontal moving unit configured to pressurize or drive in the opposite direction to release pressurization; And provided at one side and the other side in the longitudinal direction of the slot die coater, respectively, disposed in front of the coater holding unit and contacting the coater holding unit to press the coater holding unit in a direction from the top to the bottom of the slot die coater. Vertical pressurizing unit; It includes.

According to an aspect of the present invention, the distance between the upper discharge port and the lower discharge port may be adjusted by sliding the upper die of the slot die coater along an inclined surface at an angle with respect to the ground.

In particular, according to the slot die coater adjusting device according to the present invention, even if a force is applied in parallel to the ground, the force is applied in a direction perpendicular to the inclined surface through the direction change of the force according to the application of the bearing, This allows the upper die to move smoothly along the direction parallel to the inclined surface.

The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the detailed description of the invention to serve as a further understanding of the technical spirit of the present invention, the present invention described in such drawings It should not be construed as limited to.
1 is a schematic diagram showing an example of use of a slot die coater according to the prior art.
2 is a cross-sectional view showing the shape of a slot die coater according to the prior art used in the multilayer active material coating process.
3 is an overall perspective view showing an electrode active material coating system according to an embodiment of the present invention.
4 is a cross-sectional view showing a slot die coater applied to the electrode active material coating system according to an embodiment of the present invention.
5 is a partially enlarged view illustrating a rear surface of an electrode active material coating system and a slot die coater applied thereto according to an embodiment of the present invention.
FIG. 6 is a view illustrating a process of forming two active material layers on an electrode current collector using the slot die coater shown in FIG. 4.
7 is a partial perspective view showing a part of an electrode active material coating system according to an embodiment of the present invention.
8 is a side view showing an electrode active material coating system according to an embodiment of the present invention.
9 is a vertical cross-sectional view of the electrode active material coating system according to an embodiment of the present invention, showing a side view.
10 is a side view showing a horizontal moving unit and a vertical pressing unit constituting the slot die coater adjusting device according to an embodiment of the present invention.
11 is a view for explaining the principle that the upper die of the slot die coater to move forward by the slot die coater adjusting apparatus according to an embodiment of the present invention.
12 is a view for explaining the principle that the upper die of the slot die coater to move backward by the slot die coater adjusting apparatus according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only some of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Hereinafter, an electrode active material coating system according to an embodiment of the present invention will be described with reference to FIG. 3.

3 is an overall perspective view showing an electrode active material coating system according to an embodiment of the present invention.

Referring to FIG. 3, an electrode active material coating system according to an embodiment of the present invention includes a slot die coater 100 and a slot die coater adjusting apparatus 200.

The slot die coater 100 coats an electrode active material slurry on an electrode current collector to form an electrode active material layer. The slot die coater 100 has a structure capable of discharging the electrode active material slurry through a pair of discharge holes formed in the lower die 110 and the upper die 120, thereby providing two electrode active material layers on the electrode current collector. Can be formed. Detailed structure and function of the slot die coater 100 according to the present invention will be described later in detail with reference to FIGS.

The slot die coater adjusting device 200 is a device configured to adjust the distance between a pair of discharge ports formed in the slot die coater 100, the coater holding unit 210, the horizontal moving unit 220 and the vertical pressurization Unit 230.

The coater holding unit 210 is fixed to the upper die 120 of the slot die coater 100, and transversely between one end and the other end of the slot die coater 100 in the longitudinal direction (the Y-axis direction of FIG. 3). And extends to the outside of the slot die coater 100.

The horizontal moving unit 220 is provided on one side and the other side in the longitudinal direction of the slot die coater 100 and is disposed further behind the coater holding unit 210. The horizontal moving unit 220 is in contact with the coater holding unit 210 and is driven in a direction from the rear of the slot die coater to the front (X-axis direction in FIG. 3) to press the coater holding unit 210 or to Drive in the opposite direction to release the pressure.

The vertical pressing unit 230 is provided on one side and the other side of the slot die coater 100 in the longitudinal direction, respectively, and is disposed in front of the coater holding unit 210. The vertical pressing unit 230 contacts the coater holding unit 210 and presses the coater holding unit 210 in a direction from the top to the bottom of the slot die coater 100 (parallel to the Z axis of FIG. 3). .

On the other hand, the horizontal movement unit 220 is disposed more rearward than the coater holding unit 210 and the vertical pressing unit 230 is located further ahead of the coater holding unit 210, the first fixing part 130 And a horizontal pressing unit 220 and a coater holding unit along a direction from the rear surface of the slot die coater 100 on which the second fixing portion 140 is formed (the direction parallel to the X axis of FIG. 3) to the front surface thereof. It means that the 210 and the vertical pressing unit 230 are arranged in order.

A detailed structure of the coater holding unit 210, the horizontal moving unit 220, and the vertical pressurizing unit 230 and the specific functions of the slot die coater adjusting device 200 will be described later in detail with reference to FIG. 7.

Next, the slot die coater 100 according to the present invention will be described in detail with reference to FIGS. 4 to 6.

4 is a cross-sectional view illustrating a slot die coater applied to an electrode active material coating system according to an embodiment of the present invention, and FIG. 5 is a rear view of an electrode active material coating system and a slot die coater applied thereto according to an embodiment of the present invention. 6 is a diagram illustrating a process of forming two active material layers on an electrode current collector using the slot die coater illustrated in FIG. 4.

4 to 6, the slot die coater 100 includes a lower die 110 having a lower discharge port 110A and an upper die 120 having an upper discharge port 120A.

The lower die 110 includes a first die block 111 and a second die block 112 disposed above the first die block 111. Although not shown in the drawing, the first die block 111 may include a first slurry accommodating portion formed in a groove shape having a predetermined depth on a surface facing the second die block 112. The first slurry accommodating part may be connected to an active material slurry supply chamber installed outside to continuously receive the first active material slurry. The first slurry accommodating part may include a slurry supply port in communication with the active material slurry supply chamber.

When the first active material slurry is filled in the first slurry accommodating portion according to the supply of the first active material slurry by the active material slurry supply chamber, the first active material slurry is formed of the first die block 111 and the second die block 112. It is discharged to the outside through the lower discharge port (110A) formed by the coupling.

The upper die 120 includes a third die block 121 and a fourth die block 122 disposed above the third die block 121. Although not shown in the drawing, the third die block 121 may include a second slurry receiving portion formed in a groove shape having a predetermined depth on a surface facing the fourth die block 122. The second slurry accommodating part may be connected to an active material slurry supply chamber installed outside to receive the second active material slurry continuously. The second slurry containing part may include a slurry supply port in communication with the active material slurry supply chamber.

When the second active material slurry is filled in the second slurry accommodating portion according to the supply of the second active material slurry by the active material slurry supply chamber, the second active material slurry is the third die block 121 and the fourth die block 122. Is discharged to the outside through the upper discharge port (120A) formed by the combination of.

Opposite surfaces of the lower die 110 and the upper die 120 may be inclined at a predetermined angle with the ground. That is, the opposing surfaces of the lower die 110 and the upper die 120 form an inclined sliding surface S at an angle with the ground, and the upper die 120 is such a sliding surface on the lower die 110. Along with (S) it is moved forward or backward along the direction inclined at a predetermined angle with respect to the ground.

Here, the front means a direction in which the outlets 110A and 120A of the slot die coater 100 are formed, and the rear means the opposite direction.

The slot die coater 100 may further include a first fixing part 130 and a second fixing part 140 provided on the rear surface of the slot die coater 100. The first fixing part 130 is provided with at least one pair to fasten the first die block 111 and the second die block 112, and also to fasten the third die block 121 and the fourth die block 122. Let's do it. At least one second fixing part 140 is provided to fasten the lower die 110 and the upper die 120.

The second fixing part 140 is installed with a certain level of assembly tolerance (about 300 μm to 500 μm) in consideration of the fact that the upper die 120 should move forward or backward on the lower die 110. .

That is, as will be described later, the upper die 120 is moved forward or rearward along the sliding surface S on the lower die 110 by the operation of the horizontal moving unit 220. The lower die 110 and the upper die 120 is fixed so that a certain level of movement does not occur, it is to allow a minute movement due to the assembly tolerance.

Referring to FIG. 6, as described above, the upper die 120 moves forward or backward along the sliding surface S on the lower die 110 so as to be spaced between the first outlet 110A and the second outlet 120A. Can be formed.

In particular, when the lower die 110 and the upper die 120 are aligned, the upper die 120 moves backward so that the second discharge hole 120A is located further rearward than the first discharge hole 110A. The first active material layer A1 may be first formed on the electrode current collector E wound around the coating roll R, and the second active material layer A2 may be formed thereon.

At this time, the moving distance of the upper die 120 is set in consideration of the thickness of the second active material layer (A2) to be laminated, thereby stably laminating the second active material layer (A2) on the first active material layer (A1). Can be.

Next, the slot die coater adjusting apparatus 200 according to an embodiment of the present invention will be described in detail with reference to FIGS. 7 to 10 along with FIG. 4.

7 is a partial perspective view showing a part of an electrode active material coating system according to an embodiment of the present invention, Figure 8 is a side view showing an electrode active material coating system according to an embodiment of the present invention. In addition, Figure 9 is a vertical cross-sectional view of the electrode active material coating system according to an embodiment of the present invention, a view showing a side view, Figure 10 constitutes a slot die coater adjusting apparatus according to an embodiment of the present invention It is a side view which shows a horizontal moving unit and a vertical pressurization unit.

7 to 10 together with FIG. 4, the slot die coater adjusting device 200 according to an embodiment of the present invention may include a coater holding unit 210, a horizontal moving unit 220, and a vertical pressing unit 230. ).

The coater holding unit 210 is fixed to the upper die 110 of the slot die coater 100, the slot die coater 100 of the slot die coater 100 across the lengthwise end and the other end of the slot die coater 100 It extends to the outside.

The coater holding unit 210 includes a holding beam 211, a rear oblique plate 212 and a front oblique plate 213.

The holding beam 211 is fixed to an upper surface of the slot die coater 100, that is, an upper surface of the upper die 110, and crosses between one end portion in the longitudinal direction of the slot die coater 100 and the other end of the slot die coater 100. It extends to the outside of the coater.

The rear oblique plate 212 is provided at one end portion and the other end portion in the longitudinal direction of the holding beam 211, and faces the horizontal moving unit 210 in both front and rear directions of the holding beam 211, that is, the rear surface. It is provided on the phase. The front oblique plate 213 is provided at one end portion and the other end portion in the longitudinal direction of the holding beam 211, and faces the vertical pressurizing unit 230 among front and rear surfaces of the holding beam 211, that is, the front surface. It is provided on the phase.

The rear oblique plate 212 has a rear inclined portion 212a parallel to the surface opposite to the lower die 110 and the upper die 120, that is, the surface perpendicular to the sliding surface S (see FIG. 4). Equipped. Similarly, the front oblique plate 213 includes a front inclined portion 213a parallel to a surface perpendicular to the sliding surface S. As shown in FIG.

The rear inclined portion 212a and the front inclined portion 213a are in contact with the bearing B (see FIG. 9) as will be described later, whereby the coater holding unit 210 and the upper die 120 coupled thereto are It can be moved smoothly to the top or bottom along the direction perpendicular to the sliding surface (S).

The horizontal movement unit 220 is provided at one side and the other side in the longitudinal direction of the slot die coater 100, but is disposed further behind the coater holding unit 210, and is in contact with the coater holding unit 210. It is driven in the direction from the rear of the front to the front to press the coater holding unit 210 or in the opposite direction to be released from the pressure.

The horizontal moving unit 220 includes a base block 221, a reducer 222, a knob 223, a horizontal moving block 224, and a rear bearing assembly 225.

The base block 221 is fixed to the ground directly or indirectly, and has an LM guide (Linear motion guide) 221a on its upper surface.

The reducer 222 is fixed on the base block 221 and moves the horizontal moving block 224 forward or backward by the rotation of the knob 223. The horizontal moving block 224 is connected to the reducer 222 and the movement is guided by the LM guide 221a to move forward or backward.

The reducer 222 converts the force transmitted along the direction perpendicular to the ground (parallel to the Z axis) by the rotation of the knob 223 in the direction perpendicular to the axis (parallel to the X axis). . The reducer 222 allows a force greater than the force applied to the knob 223 to be transmitted to the horizontal moving block 224 through an appropriate gear ratio, and also enables fine movement of the horizontal moving block 224.

The rear bearing assembly 225 is coupled to one side of the horizontal moving block 224 to contact the rear inclined portion 212a. In detail, the rear bearing assembly 225 includes a plurality of bearings B, and the bearings B come into contact with the rear inclined portions 212a so that the coater holding unit 210 slides on the sliding surface S ( It can be easily moved up and down in a direction perpendicular to the (see FIG. 4).

The vertical pressurizing unit 230 is provided on one side and the other side in the longitudinal direction of the slot die coater 100, but is disposed in front of the coater holding unit 210, and is in contact with the coater holding unit 210. The coater holding unit 210 is pressed in the direction from the top to the bottom of the 100.

The vertical pressurizing unit 230 includes a vertical pressurizing cylinder 232, a vertical pressurizing block 234 and a front bearing assembly 235.

The vertical pressurizing cylinder 232 is fixed to the ground directly or indirectly, and applies a force directed downward (parallel to the Z axis) to the vertical pressurizing block 234 connected to the upper portion.

The front bearing assembly 235 is coupled to one side of the vertical pressing block 234 to contact the front inclined portion 213a. That is, the front bearing assembly 235 includes a plurality of bearings B, and the bearing B is in contact with the front inclined portion 213a so that the coater holding unit 210 slides on the sliding surface S (Fig. It can be easily moved up and down along the direction perpendicular to (see 4).

Next, the operation of the slot die coater adjusting apparatus 200 and the movement of the slot die coater 100 according to an embodiment of the present invention will be described with reference to FIGS. 11 and 12 along with FIGS. 7 to 10. Shall be.

FIG. 11 is a view illustrating a principle in which an upper die of a slot die coater moves forward by a slot die coater adjusting device according to an embodiment of the present invention, and FIG. 12 is a slot die coater according to an embodiment of the present invention. It is a figure for demonstrating the principle which an upper die | dye of a slot die coater moves back by an adjustment apparatus.

First, referring to FIG. 11 along with FIGS. 7 to 10, in order to advance the upper die 120 toward the front of the slot die coater 100 (the direction parallel to the X axis), the reducer 222 is a slot die. The force F1 is applied in the direction from the rear of the coater 100 to the front (parallel to the X axis). At this time, the vertical pressurizing cylinder 232 applies a constant force F2 downward (parallel to the Z-axis) so that the front portion (the end in the right direction relative to FIG. 11) of the upper die 120 is not lifted upward. In addition, the coater holding unit 210 is pressed downward.

In this case, the coater holding unit 210 receives a force F3 upward in a direction perpendicular to the sliding surface S, thereby generating a fine play between the upper die 120 and the lower die 110. The upper die 120 is advanced toward the front of the slot die coater 100.

The force F3 acting upward along the direction perpendicular to the sliding surface S is the bearings B contacting the front and rear portions of the coater holding unit 210 even if it is only a very fine force. Due to the coater holding unit 210 to be able to move smoothly upward by a fine distance along the direction perpendicular to the sliding surface (S).

The advancing distance of the upper die 120 is a fine distance in the range of approximately 300 to 500 μm, and the LM guide 221a and the horizontal moving block to move the upper die 120 in a direction parallel to the sliding surface S as described above. There is a certain level of assembly tolerance in the engagement between 224. This assembly tolerance allows the horizontal movement block 224 to move in the horizontal direction (parallel to the X axis), as well as to finely move hundreds of micro ranges in the vertical direction (parallel to the Z axis).

In addition, in order to allow the upper die 120 to move in a direction parallel to the sliding surface S, there is a certain level of assembly tolerance in the vertical pressurizing cylinder 232. These assembly tolerances allow the vertical pressurized cylinder 232 to move in the vertical direction as well as to make fine movements in the range of hundreds of microns.

Next, referring to FIG. 12 in conjunction with FIGS. 7 to 10, the reducer 222 is slotted to retract the upper die 120 toward the rear of the slot die coater 100 (the direction parallel to the X axis). The force F4 is applied in the direction from the front of the die coater 100 to the rear (parallel to the X axis). At this time, the vertical pressurizing cylinder 232 applies a constant force F5 downward (parallel to the Z axis) in order to maintain close contact between the front bearing assembly 235 and the front inclined portion 213a.

In this case, the coater holding unit 210 receives a force F6 downward in a direction perpendicular to the sliding surface S, whereby the opposing surfaces of the upper die 120 and the lower die 110 are close to each other. The upper die 120 is reversed toward the rear of the slot die coater 100 while being cut.

The force F6 acting downward along the direction perpendicular to the sliding surface S is the bearings B contacting the front and rear portions of the coater holding unit 210 even when it is only a very fine force. Due to the coater holding unit 210 to be able to move smoothly downward by a fine distance along the direction perpendicular to the sliding surface (S).

The reverse distance of the upper die 120 is a fine distance in the range of approximately 300 ~ 500㎛, as described above to allow the upper die 120 to move in a direction parallel to the sliding surface (S) as described above LM guide 221a And there is a certain level of assembly tolerance in engagement between and horizontal moving block 224.

In addition, as described above, in order to allow the upper die 120 to move in a direction parallel to the sliding surface S, there is a certain level of assembly tolerance in the vertical pressurizing cylinder 232.

As described above, the electrode active material coating system according to an embodiment of the present invention and the slot die coater adjusting apparatus according to an embodiment of the present invention, the upper die 120 in the direction perpendicular to the sliding surface (S) Diagonal plates 212 and 213 and first and second bearing assemblies 225 and 235 are provided to move smoothly. According to the electrode active material coating system and the slot die coater adjusting device, the upper die 120 can be smoothly moved along the sliding surface S only by the combination of the force in the horizontal direction and the force in the vertical direction. The distance between the lower discharge port 110A and the upper discharge port 110B can be easily adjusted.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

100: slot die coater
110: lower die
110A: lower outlet
111: first die block
112: second die block
120: upper die
120A: upper discharge port
121: third die block
122: fourth die block
S: sliding face
130: first fixing part
140: second fixing part
200: slot die coater adjusting device
210: coater holding unit
211: holding beam
212 rear oblique plate
212a: rear slope
213: front oblique plate
213a: front slope
220: horizontal moving unit
221: base block
221a: LM guide
222: reducer
223 knob
224 horizontal moving block
225: rear bearing assembly
230: vertical pressurization unit
232: vertical pressurized cylinder
234: vertical press block
235: front bearing assembly
B: bearing

Claims (12)

A slot die coater comprising a lower die having a lower discharge port for discharging a first active material slurry and an upper die having an upper discharge port for discharging a second active material slurry, wherein the upper die is moved so that the upper die moves between the lower discharge port and the upper discharge port. Slot die coater adjusting device to adjust the distance,
A coater holding unit fixed to the upper die and extending to the outside of the slot die coater across between the longitudinal one end and the other end of the slot die coater;
It is provided on one side and the other side in the longitudinal direction of the slot die coater, and disposed further rearward than the coater holding unit, and is driven in a direction from the rear of the slot die coater to the front in contact with the coater holding unit to operate the coater holding unit. A horizontal moving unit configured to pressurize or drive in the opposite direction to release pressurization; And
It is provided on one side and the other side in the longitudinal direction of the slot die coater, and disposed in front of the coater holding unit, contacting the coater holding unit to press the coater holding unit in a direction from the top to the bottom of the slot die coater toward the bottom Vertical pressurization unit;
Slot die coater adjustment apparatus comprising a. The method of claim 1,
The coater holding unit,
A holding beam fixed to the upper die and extending to the outside of the slot die coater across between a longitudinal one end and the other end of the slot die coater;
A rear oblique plate provided at one end of the holding beam in the longitudinal direction and the other end thereof, the rear oblique plate being provided on a rear surface of the holding beam in front and rear directions toward the horizontal moving unit; And
A front oblique plate provided at one side of the holding beam in the longitudinal direction and the other end, and provided on a front surface of the front and rear surfaces of the holding beam toward the vertical pressing unit;
Slot die coater adjusting apparatus comprising a. The method of claim 2,
The lower die and the upper die of the slot die coater have an inclined surface at an angle to the ground and have an inclined shape.
And the rear oblique plate and the front oblique plate each have a rear inclined portion and a front inclined portion formed in parallel with a surface perpendicular to the opposing surface. The method of claim 3,
The horizontal moving unit includes a rear bearing assembly in contact with the rear inclined portion,
And said vertical pressurizing unit comprises a front bearing assembly in contact with said front inclined portion. The method of claim 4, wherein
The horizontal moving unit,
A base block having an LM guide on an upper surface thereof;
A reducer fixed on the base block; And
A horizontal moving block connected to the reducer and moving forward and backward along the LM guide by an operation of the reducer, the rear bearing assembly being coupled to one side thereof;
Slot die coater adjustment apparatus further comprises. The method of claim 4, wherein
The vertical pressurization unit,
Vertical pressurized cylinder; And
A vertical pressurizing block connected to the vertical pressurizing cylinder, receiving a downward force by the operation of the vertical pressurizing cylinder, and the front bearing assembly coupled to one side thereof;
Slot die coater adjustment apparatus further comprises. A slot die coater including a lower die having a lower discharge port for discharging the first active material slurry and an upper die having an upper discharge port for discharging the second active material slurry;
A coater holding unit fixed to the upper die and extending to the outside of the slot die coater across between the longitudinal one end and the other end of the slot die coater;
It is provided on one side and the other side in the longitudinal direction of the slot die coater, and disposed further rearward than the coater holding unit, and is driven in a direction from the rear of the slot die coater to the front in contact with the coater holding unit to operate the coater holding unit. A horizontal moving unit configured to pressurize or drive in the opposite direction to release pressurization; And
It is provided on one side and the other side in the longitudinal direction of the slot die coater, and disposed in front of the coater holding unit, contacting the coater holding unit to press the coater holding unit in a direction from the top to the bottom of the slot die coater toward the bottom Vertical pressurization unit;
Electrode active material coating system comprising a. The method of claim 7, wherein
The coater holding unit,
A holding beam fixed to the upper die and extending to the outside of the slot die coater across between a longitudinal one end and the other end of the slot die coater;
A rear oblique plate provided at one end of the holding beam in the longitudinal direction and the other end thereof, the rear oblique plate being provided on a rear surface of the holding beam in front and rear directions toward the horizontal moving unit; And
A front oblique plate provided at one side of the holding beam in the longitudinal direction and the other end, and provided on a front surface of the front and rear surfaces of the holding beam toward the vertical pressing unit;
Electrode active material coating system comprising a. The method of claim 8,
The lower die and the upper die of the slot die coater have an inclined surface at an angle to the ground and have an inclined shape.
And the rear oblique plate and the front oblique plate each have a rear inclined portion and a front inclined portion formed in parallel with a surface perpendicular to the opposite surface. The method of claim 9,
The horizontal moving unit includes a rear bearing assembly in contact with the rear inclined portion,
The vertical pressing unit, the electrode active material coating system, characterized in that it comprises a front bearing assembly in contact with the front inclined portion. The method of claim 10,
The horizontal moving unit,
A base block having an LM guide on an upper surface thereof;
A reducer fixed on the base block; And
A horizontal moving block connected to the reducer and moving forward and backward along the LM guide by an operation of the reducer, the rear bearing assembly being coupled to one side thereof;
Electrode active material coating system characterized in that it further comprises. The method of claim 10,
The vertical pressurization unit,
Vertical pressurized cylinder; And
A vertical pressurizing block connected to the vertical pressurizing cylinder, receiving a downward force by the operation of the vertical pressurizing cylinder, and the front bearing assembly coupled to one side thereof;
Electrode active material coating system characterized in that it further comprises.

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