Die coater with lip variable mechanism

Abstract

The present disclosure relates to a die coater including a lower block having a manifold for accommodating slurry, and an upper block combined with the lower block, in which a slit extending along a TD side is formed on a front surface of the lower block and the upper block, and a discharge portion is provided between the manifold and the slit, in which a groove is formed along the TD side below the discharge portion of the lower block, and the die coater includes a plurality of lip variable mechanisms including a solenoid extending from a bottom surface of the lower block and passing through the groove, the solenoid performing a pushing operation of pushing the discharge portion and a pulling operation of pulling the discharge portion.

Description

Technical Field

[0001] This disclosure relates to a mold coating machine equipped with a variable lip mechanism that can change the profile of the lip from which the slurry is discharged along the TD (transverse direction) side.

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0115416, filed on August 27, 2024, the disclosure of which is incorporated herein by reference. Background Technology

[0003] Recently, lithium-ion batteries have been widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as battery packs for hybrid and electric vehicles, or energy storage systems (ESS). In particular, with increasing concerns about environmental issues, extensive research is being conducted on electric and hybrid vehicles, which can replace fossil fuel-powered vehicles such as gasoline and diesel vehicles, which are one of the main causes of air pollution.

[0004] Typically, lithium secondary batteries have a structure in which an electrode assembly consisting of a positive electrode, a negative electrode, and a separator is immersed in a lithium electrolyte. Electrodes are formed by coating an electrode current collector with an electrode slurry containing electrode active materials, and coating devices such as die coaters are used to coat the electrode slurry.

[0005] The die coating machine has a structure in which slurry supplied from the outside is filled into an internal manifold, and the slurry is discharged through an unloading section in front of the manifold. In this structure, lateral deviation in slurry loading can occur depending on the tightness of the shims along the TD (Transverse Direction, the width direction of the electrode foil on which the slurry is applied). As a way to improve this lateral deviation, the lip profile can be adjusted by using a bolt structure installed at multiple locations along the TD side to generate deformation of the unloading section through pushing or pulling, thereby improving the slurry loading deviation.

[0006] The variable lip structure using bolts requires consideration of numerous factors such as thread pitch during adjustment, and because the adjustment is done manually, fine-tuning and adjustment require considerable effort. Furthermore, the bolt structure is quite complex to apply bidirectional force to push or pull the unloading part, and this complexity results in significant variations in the improvement effect depending on the operator's skill level. Summary of the Invention

[0007] Technical issues

[0008] This disclosure aims to provide a mold coating machine with a novel structure that can adjust the lip profile of the mold coating machine through an automated process.

[0009] However, the technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of this disclosure below that there are other problems not mentioned.

[0010] Technical solution

[0011] This disclosure relates to a mold coating machine, comprising: a lower block having a manifold for receiving slurry; and an upper block coupled to the lower block, wherein a slit extending along a TD side is formed on the front surfaces of the lower block and the upper block, and an unloading portion is provided between the manifold and the slit, wherein a groove is formed below the unloading portion of the lower block along the TD side, and the mold coating machine includes: a plurality of variable lip mechanisms, the plurality of variable lip mechanisms including a solenoid extending from the bottom surface of the lower block and passing through the groove, the solenoid performing a pushing operation of pressing the unloading portion and a pulling operation of pulling the unloading portion.

[0012] In one embodiment, the variable lip mechanism includes: a mounting groove formed below the unloading portion by passing through the slot; a solenoid including a solenoid head received in the mounting groove and a solenoid rod extending from the solenoid head and having an outer diameter smaller than the outer diameter of the solenoid head; and an adjusting block having a through hole with a size between the outer diameter of the solenoid head and the outer diameter of the solenoid rod, and the adjusting block being fixed to the inlet of the mounting groove to form part of the top of the slot.

[0013] The variable lip mechanism performs the pushing operation, in which the solenoid head pushes the top of the mounting groove by moving the solenoid rod forward, thereby pushing the unloading part.

[0014] Furthermore, the variable lip mechanism performs the pulling operation, in which the solenoid head pushes the adjusting block downward by moving the solenoid rod backward, thereby pulling the unloading part.

[0015] In the variable lip mechanism, the adjusting block can be fixed to the inlet of the mounting groove by means of threaded fastening.

[0016] In the variable lip mechanism, the adjusting block fixing groove is formed in a stepped shape at the entrance of the mounting groove. The inner diameter of the adjusting block fixing groove is larger than the inner diameter of the mounting groove, and the adjusting block can be fixed to the adjusting block fixing groove by means of threaded fastening.

[0017] In the variable lip mechanism, the outer diameter of the solenoid head can correspond to the inner diameter of the mounting groove.

[0018] The lower block is provided with a machining hole extending from the bottom surface of the lower block to the mounting groove, wherein the inner diameter of the machining hole corresponds to the inner diameter of the mounting groove, and the solenoid rod can extend to the outside of the lower block through the machining hole.

[0019] The machining hole may be provided with a guide sleeve for guiding the solenoid rod to move back and forth.

[0020] Alternatively, the machined hole may be equipped with a displacement sensor for measuring the forward and backward displacement of the solenoid rod.

[0021] Furthermore, the mold coating machine may further include a control unit that acquires in real time the measurement values ​​of displacement sensors disposed in each of the plurality of variable lip mechanisms, and adjusts the contour formed by the lip of the slit along the TD side based on the acquired measurement values ​​of the displacement sensors.

[0022] Beneficial effects

[0023] As described above, in the mold coating machine with multiple variable lip mechanisms disclosed herein, the operation of the variable lip mechanism that changes the lip profile by pushing or pulling the unloading part is performed by a solenoid. Therefore, by substantially eliminating manual operation by the operator, adjusting the lip profile does not require as much effort as in the prior art, and the lateral deviation of the slurry loading can also be effectively adjusted.

[0024] The mold coating machine of this disclosure, through a variable lip mechanism equipped with a solenoid, can adjust the lip contour without manual operation, and can also adjust the lip contour in real time. Ultimately, this mold coating machine of the present disclosure helps to improve the quality of secondary batteries.

[0025] However, the technical effects that can be obtained through this disclosure are not limited to the effects described above, and those skilled in the art will clearly understand other effects not mentioned based on the following description of the invention. Attached Figure Description

[0026] The following figures accompanying this specification illustrate preferred embodiments of the present disclosure and, together with the detailed description of the disclosure below, serve to further illustrate the technical concept of the present disclosure. The present disclosure should not be construed as being limited to the content shown in these figures.

[0027] Figure 1 This is a diagram illustrating an embodiment of the mold coating machine.

[0028] Figure 2 This is a diagram showing the lower block of a mold coating machine equipped with a variable lip mechanism according to an embodiment of the present disclosure.

[0029] Figure 3 It is along Figure 2 The cross-sectional view taken by line "AA".

[0030] Figure 4 It is shown Figure 3 The diagram shows the variable lip mechanism performing a pushing operation.

[0031] Figure 5 It is shown Figure 3 The diagram shows the variable lip mechanism performing a pulling operation.

[0032] Figure 6 yes Figure 3 The assembly structure diagram of the variable lip mechanism.

[0033] Figure 7 This is a diagram illustrating another embodiment of the variable lip mechanism.

[0034] Figure 8 This is a diagram illustrating an embodiment of a mold coating machine equipped with a displacement sensor for a solenoid. Detailed Implementation

[0035] This disclosure can be modified in various ways and can be implemented in multiple ways, some of which will be described in detail below.

[0036] However, this is not intended to limit this disclosure to any particular implementation, but should be understood to include all modifications, equivalents or substitutions that fall within the ideas and techniques of this disclosure.

[0037] In this disclosure, the terms “comprising” or “having” are intended to indicate the presence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and are not intended to exclude the possibility of the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0038] Furthermore, when this disclosure describes layers, films, regions, plates, etc., as being "above" another part, this includes not only the case where they are "directly" above the other part, but also the case where another part exists between them. Conversely, when layers, films, regions, plates, etc., are described as being "below" another part, this includes not only the case where they are "directly" below the other part, but also the case where another part exists between them. Moreover, in this application, when a part is disposed "above" another part, this can include not only being disposed on the upper part, but also being disposed on the lower part.

[0039] This disclosure relates to a mold coating machine, comprising: a lower block having a manifold for receiving slurry; and an upper block coupled to the lower block, wherein slits extending along a TD side are formed on the front surfaces of the lower and upper blocks, and an unloading section is provided between the manifold and the slits, wherein a groove is formed below the unloading section of the lower block along the TD side, and the mold coating machine includes a plurality of variable lip mechanisms, the plurality of variable lip mechanisms including a solenoid extending from the bottom surface of the lower block and passing through the groove, the solenoid performing a pushing operation of the pushing unloading section and a pulling operation of the pulling unloading section.

[0040] As described above, in the mold coating machine with multiple variable lip mechanisms disclosed herein, the operation of the variable lip mechanism that changes the lip profile by pushing or pulling the unloading part is performed by a solenoid. Therefore, by substantially eliminating manual operation by the operator, adjusting the lip profile does not require as much effort as in the prior art, and the lateral deviation of the slurry loading can also be effectively adjusted.

[0041] Embodiments of the present invention

[0042] Hereinafter, with reference to the accompanying drawings, a detailed description of a specific embodiment of the mold coating machine 10 according to this disclosure will be provided. It should be noted that the relative positions indicated by terms such as "front / back" and "up / down / left / right" in the following description are for ease of understanding of this disclosure, and the directions shown in the accompanying drawings should be taken as reference directions unless otherwise defined.

[0043] [First Implementation]

[0044] Figure 1 This is a diagram illustrating an embodiment of a mold coating machine 10 consisting of an upper block 100 and a lower block 200. Figure 2This is a diagram showing the lower block 200 of a mold coating machine 10 according to an embodiment of the present disclosure. The mold coating machine 10 of the present disclosure is provided with a variable lip mechanism 300 in the lower block 200, and the upper block 100 has a conventional structure. Therefore, in the following description, the mold coating machine 10 of the present disclosure will be described with the lower block 200 as the focus.

[0045] The die coating machine 10 includes a lower block 200 with a manifold 210 for receiving slurry, and an upper block 100 coupled to the lower block 200. A slit 240 extending along the TD side is formed on the front surfaces of the coupled lower block 200 and upper block 100. Here, the TD (Transverse Direction) side refers to the width direction of the electrode foil, and the slurry is applied to the electrode foil through the slit 240 of the die coating machine 10. This width direction is perpendicular to the MD (Machine Direction) of the electrode foil.

[0046] In the die coating machine 10, the slit 240 is typically defined by at least one or more shim members 230 inserted between the lower block 200 and the upper block 100. In the lower block 200, a flat unloading section 220 is formed between the manifold 210 and the slit 240. The slurry passing through the unloading section 220 is discharged through the slit 240, and the discharge end of the slit 240 extending along the TD side is generally referred to as a lip. The profile of the lip can be formed as a curved shape rather than a straight line to adjust for lateral deviations in slurry loading. This lip profile can be adjusted quite freely by a lip variable mechanism 300.

[0047] Reference Figure 1 and Figure 2 A groove 320 extending along the TD side is formed below the unloading portion 220 of the lower block 200. The groove 320 is formed to reduce the rigidity of the unloading portion 220 located above the groove 320. That is, by forming a deep groove 320, the unloading portion 220 has a structure that makes it easier for deformation to occur closer to or further away from the upper block 100.

[0048] Multiple variable lip mechanisms 300 are spaced apart along a groove 320 extending along the TD side. Each variable lip mechanism 300 includes a solenoid 310 extending from the bottom surface of the lower block 200 and passing through the groove 320. This solenoid 310 performs the pushing operation of the pushing unloading section 220 and the pulling operation of the pulling unloading section 220. The shape of the slit 240 discharging slurry is locally deformed by the pushing and pulling operations of the solenoid 310, and ultimately, the overall lip profile can be altered by the multiple variable lip mechanisms 300 along the TD side.

[0049] Reference Figure 3 The structure of the variable lip mechanism will be described in detail below.

[0050] The variable lip mechanism 300 includes a mounting groove 330 formed below the unloading portion 220 through a through groove 320. The mounting groove 330 forms a space inside the top of the groove 320, and the top of the mounting groove 330 is close to the unloading portion 220.

[0051] Furthermore, the variable lip mechanism 300 includes a solenoid 310 that moves back and forth via electromagnetic force. The solenoid 310 includes a solenoid head 312 and a solenoid rod 314 extending from the solenoid head 312. As described below, for mounting the variable lip mechanism 300, the solenoid head 312 and the solenoid rod 314 form a two-piece structure that can be separated and secured. The solenoid head 312 is received in a mounting recess 330, and the solenoid rod 314 extends from the solenoid head 312 to the outside of the lower block 200. Furthermore, the outer diameter of the solenoid rod 314 is smaller than the outer diameter of the solenoid head 312.

[0052] An adjusting block 340 is inserted between the solenoid head 312 and the solenoid rod 314. The adjusting block 340 has a through hole 342 with an inner diameter between the outer diameter of the solenoid head 312 and the outer diameter of the solenoid rod 314, and is fixed to the entrance of the mounting groove 330 to form part of the top of the groove 320. The through hole 342 of the adjusting block 340 is configured to be inserted between the solenoid head 312 and the solenoid rod 314 and fixed to the entrance of the mounting groove 330. Therefore, the through hole 342 of the adjusting block 340 does not obstruct or interfere with the forward and backward movement of the solenoid rod 314. On the other hand, for the solenoid head 312, the through hole 342 of the adjusting block 340 prevents the solenoid head 312 from passing through the adjusting block 340 when the solenoid 310 moves backward. Therefore, the solenoid head 312 in contact with the adjusting block 340 applies a downward pressing force to the adjusting block 340.

[0053] Based on this configuration of the variable lip mechanism 300, the push-pull operation of the solenoid 310 will be described with reference to the accompanying drawings.

[0054] Figure 4 It is shown Figure 3The diagram shows the variable lip mechanism 300 performing a pushing operation. The pushing operation of the variable lip mechanism 300 is performed by the forward movement of the solenoid 310 toward the unloading section 220. As the solenoid rod 314 moves forward, the solenoid head 312 moves forward together, and the advancing solenoid head 312 pushes against the top of the mounting groove 330. In other words, the pushing operation of the unloading section 220 is performed by the forward movement of the solenoid rod 314. As described above, the adjusting block 340 has no effect on the forward movement of the solenoid rod 314 and the solenoid head 312.

[0055] Figure 5 It is shown Figure 3 The diagram shows the lip variable mechanism 300 performing a pulling operation. The pulling operation of the lip variable mechanism 300 is performed by the rearward movement of the solenoid 310 away from the unloading section 220. By the rearward movement of the solenoid rod 314, the solenoid head 312 reaches the adjusting block 340. As described above, due to the size of the through hole 342 of the adjusting block 340, the solenoid rod 314 performs rearward movement without obstruction, while the solenoid head 312 cannot pass through the through hole 342 and apply downward pressing force to the adjusting block 340. Since the adjusting block 340 is fixed to the entrance of the mounting groove 330 to form part of the top of the groove 320, the pulling operation of the unloading section 220 located above the groove 320 is finally performed by the rearward movement of the solenoid rod 314.

[0056] Here, the solenoid head 312 can form a small gap relative to the top of the adjusting block 340 and the mounting groove 330. This gap allows for a neutral state where the solenoid head 312 applies no force to either the adjusting block 340 or the top of the mounting groove 330. This neutral state of the solenoid head 312, along with the push-pull operation, facilitates adjustment of the lip profile.

[0057] Figure 6 Exemplary Figure 3 The assembly structure diagram of the variable lip mechanism 300 is shown. In this assembly structure of the variable lip mechanism 300, the important feature is that the adjusting block 340 is inserted between the solenoid head 312, which is accommodated in the mounting groove 330 formed below the unloading part 220, and the solenoid 310 extending to the outside of the lower block 200, and the adjusting block 340 is fixed to the entrance of the mounting groove 330.

[0058] The lower block 200 has a machined hole 350 that extends from its bottom surface, through the groove 320, and reaches the mounting recess 330. In other words, in order to form the mounting recess 330, a hole is machined from the bottom surface of the lower block 200 with a diameter corresponding to the inner diameter of the mounting recess 330, and due to this hole machining, the machined hole 350 remains in the lower block 200.

[0059] As described above, the solenoid head 312 and the solenoid rod 314 form a two-piece structure that can be separated and fastened. During the assembly of the variable lip mechanism 300, only the separated solenoid head 312 is inserted into the mounting groove 330 through the machined hole 350.

[0060] With the solenoid head 312 positioned in the mounting groove 330, an adjusting block 340 is inserted through the slot 320. The adjusting block 340, inserted through the slot 320, is aligned with the inlet of the mounting groove 330 and then secured. For example, the adjusting block 340 can be secured to the inlet of the mounting groove 330 by threaded fastening. In this case, torque can be applied to the adjusting block 340 using a tool deeply inserted into the machined hole 350, thereby threading the adjusting block 340 to the inlet of the mounting groove 330. By securing this adjusting block 340, the adjusting block 340 forms part of the top of the slot 320. Furthermore, with the adjusting block 340 secured, the solenoid head 312 cannot be separated from the mounting groove 330.

[0061] Finally, the solenoid rod 314 approaches the solenoid head 312 through the machined hole 350 and the through hole 342 of the adjusting block 340, and engages with it. For example, the solenoid rod 314 can be integrally engaged with the solenoid head 312 by means of threaded fastening. Even with threaded fastening, since the solenoid rod 314 only moves back and forth, it is very unlikely to come loose from the solenoid head 312.

[0062] Furthermore, the machining hole 350 may be provided with a guide sleeve 360 ​​for guiding the solenoid rod 314 to move back and forth. The space of the machining hole 350 is filled by the guide sleeve 360, enabling the solenoid rod 314 to perform stable back and forth movement.

[0063] Figure 7 This is a diagram illustrating another embodiment of the variable lip mechanism 300. Figure 7 In the variable lip mechanism 300, the adjusting block fixing groove 332 is formed in a stepped shape at the entrance of the mounting groove 330, and the inner diameter of the adjusting block fixing groove 332 is larger than the inner diameter of the mounting groove 330. Furthermore, the adjusting block 340 is fixed to the adjusting block fixing groove 332 by threaded fastening. In this embodiment, by providing a separate adjusting block fixing groove 332 for fixing the adjusting block 340 by threaded fastening, the outer diameter of the solenoid head 312 can be made large enough to correspond to the inner diameter of the mounting groove 330. Therefore, the solenoid head 312 can perform a stable push-pull operation on the unloading part 220 with almost no force loss. For reference, in Figure 7 In one embodiment, the inner diameter of the machining hole 350 can correspond to the inner diameter of the adjusting block fixing groove 332.

[0064] [Second Implementation]

[0065] Figure 8 This is a diagram illustrating an embodiment of a mold coating machine 10 equipped with a displacement sensor 400 for a solenoid 310. In the first embodiment described above, it is explained that the solenoid 310 provided in the lip variable mechanism 300 performs a push-pull operation on the unloading part 220 of the lower block 200. As a result, by eliminating the manual operation of the bolt structure for adjusting the lip profile, the problem of requiring a lot of effort for fine-tuning and adjustment can be solved.

[0066] In the second embodiment, based on solving this problem, a method is proposed for adjusting the lip contour in real time through automatic control of multiple lip variable mechanisms 300, thereby more effectively solving the lateral deviation of slurry loading.

[0067] Reference Figure 7 A displacement sensor 400 for measuring the forward and backward displacement of the solenoid rod 314 is provided in the machined hole 350. In the illustrated form, by installing a displacement sensor 400 with a form similar to that of the guide sleeve 360 ​​in the machined hole 350, the displacement of the solenoid rod 314 relative to the displacement sensor 400 can be measured. The displacement sensor 400 can be any measurement method, whether contact or non-contact. For example, a linear variable differential transformer (LVDT), an eddy current displacement sensor, a magnetic displacement sensor 400, etc., can be used. Furthermore, this displacement sensor 400 can be provided for all the plurality of lip variable mechanisms 300 provided on the groove 320 extending along the TD side on the front of the lower block 200.

[0068] In this manner, in embodiments where each lip variable mechanism 300 is equipped with a displacement sensor 400, a control unit 500 can be provided to control all lip variable mechanisms 300 as a whole. The control unit 500 can acquire in real time the measurement values ​​of the displacement sensors 400 provided in each of the plurality of lip variable mechanisms 300, and adjust the contour formed by the lip of the slit 240 along the TD side based on the acquired measurement values ​​of the displacement sensors 400. That is, by controlling each individual lip variable mechanism 300 to be in a pushing operation, pulling operation, or neutral state, the overall shape of the lip contour along the TD side can be adjusted in various ways.

[0069] Real-time adjustment of the lip contour via the control unit 500 can be performed in various ways. For example, a reference value for the solenoid rod 314 can be preset for each lip variable mechanism 300, and the changes over time resulting from the cumulative operating time of the mold coating machine 10 can be monitored in real time. Adjustments can be performed on lip variable mechanisms 300 whose monitoring results deviate from the error range of the reference value. Alternatively, the lateral deviation of the slurry loaded on the electrode foil can be observed in real time using a vision device or the like, and feedback control can be performed on each lip variable mechanism 300 in one direction based on the observation of the slurry loading to reduce the lateral deviation.

[0070] Therefore, the mold coating machine 10 of this disclosure, through the lip variable mechanism 300 provided with solenoid 310, can adjust the lip contour without manual operation, and can also adjust the lip contour in real time. Ultimately, this mold coating machine 10 of this disclosure helps to improve the quality of secondary batteries.

[0071] The present disclosure has been described in detail above with reference to the accompanying drawings and embodiments. However, the configurations described in the drawings or embodiments of this specification are merely one implementation of the present disclosure and do not represent all the technical concepts of the present disclosure. Therefore, it should be understood that various equivalents and modifications of the present disclosure may have been made as of the date of filing of this application.

[0072] [Reference Marker Explanation]

[0073] 10: Mold Coating Machine

[0074] 100: Upper block

[0075] 200: Lower block

[0076] 210: manifold

[0077] 220: Unloading Department

[0078] 230: Gasket component

[0079] 240: Slit

[0080] 300: Variable lip mechanism

[0081] 310: Solenoid

[0082] 312: Solenoid head

[0083] 314: Solenoid rod

[0084] 320: Slot

[0085] 330: Mounting groove

[0086] 332: Adjusting block fixing groove

[0087] 340: Adjusting block

[0088] 342: Through hole

[0089] 350: Machining hole

[0090] 360: Guide sleeve

[0091] 400: Displacement sensor

[0092] 500: Control Department

[0093] TD: Lateral direction

[0094] MD: Machine Direction

Claims

1. A mold coating machine, comprising: The device comprises a lower block for receiving slurry and an upper block joined to the lower block, wherein slits extending along the TD side are formed on the front surfaces of the lower and upper blocks, and an unloading section is provided between the manifold and the slits. A groove is formed along the TD side below the unloading portion of the lower block, and the mold coating machine includes: Multiple variable lip mechanisms, each including a solenoid extending from the bottom surface of the lower block and passing through the groove, the solenoid performing a pushing operation of the unloading part and a pulling operation of the unloading part.

2. The mold coating machine according to claim 1, wherein... The variable lip mechanism includes: The mounting groove is formed below the unloading part by passing through the slot; The solenoid includes a solenoid head received in the mounting groove, and a solenoid rod extending from the solenoid head and having an outer diameter smaller than the outer diameter of the solenoid head; and An adjusting block having a through hole with a size between the outer diameter of the solenoid head and the outer diameter of the solenoid rod, and the adjusting block being fixed to the inlet of the mounting groove to form part of the top of the groove.

3. The mold coating machine according to claim 2, wherein... The variable lip mechanism performs the pushing operation, in which the solenoid head pushes the top of the mounting groove by moving the solenoid rod forward, thereby pushing the unloading part.

4. The mold coating machine according to claim 2 or 3, wherein... The variable lip mechanism performs the pulling operation, in which the solenoid head pushes the adjusting block downward by moving the solenoid rod backward, thereby pulling the unloading part.

5. The mold coating machine according to claim 2, wherein... In the variable lip mechanism, the adjusting block is fixed to the inlet of the mounting groove by means of threaded fastening.

6. The mold coating machine according to claim 5, wherein... In the variable lip mechanism, the adjusting block fixing groove is formed in a stepped shape at the entrance of the mounting groove, and the inner diameter of the adjusting block fixing groove is larger than the inner diameter of the mounting groove. The adjusting block is fixed to the adjusting block fixing groove by means of threaded fastening.

7. The mold coating machine according to claim 6, wherein... In the variable lip mechanism, the outer diameter of the solenoid head corresponds to the inner diameter of the mounting groove.

8. The mold coating machine according to claim 2, wherein... The lower block is provided with a machining hole extending from the bottom surface of the lower block to the mounting groove, wherein... The inner diameter of the machined hole corresponds to the inner diameter of the mounting groove, and The solenoid extends to the outside of the lower block through the machining hole.

9. The mold coating machine according to claim 8, wherein... The machining hole is provided with a guide sleeve for guiding the solenoid rod to move back and forth.

10. The mold coating machine according to claim 8, wherein... The machining hole is equipped with a displacement sensor for measuring the forward and backward displacement of the solenoid rod.

11. The mold coating machine according to claim 10, further comprising: The control unit acquires in real time the measurement values ​​of the displacement sensors installed in each of the plurality of variable lip mechanisms, and adjusts the contour formed by the lip of the slit along the TD side based on the acquired measurement values ​​of the displacement sensors.

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