Electrode sheet dry film forming device and its feeding mechanism

Abstract

The utility model provides a kind of electrode sheet dry method film forming device and its feeding mechanism, it is related to battery material production technical field, including feeder, distribution component and stopper, the lower part of the feeder has the blanking outlet for discharging;The distribution component is arranged at the blanking outlet of the feeder, and the blanking outlet is divided into at least two distribution ports transversely side by side, the distribution component is movably arranged on the feeder transversely, to adjust the size of distribution port;The stopper is below the blanking outlet, the stopper includes support component and multiple limiting components, which are installed on support component and transversely spaced, form feed channel between adjacent two limiting components, each feed channel corresponds a distribution port;Wherein, the transverse spacing between adjacent limiting components is adjustable, to adapt to the size of corresponding distribution port, improve the efficiency of electrode film production, while improve the flexibility and adaptability of feeding mechanism distribution work material.

Description

Technical Field

[0001] This utility model relates to the field of battery material production technology, and in particular to an electrode sheet dry film forming device and its feeding mechanism. Background Technology

[0002] With the rapid development of the new energy industry, the demand for high-performance electrodes in energy storage devices such as lithium-ion batteries and supercapacitors is increasing. Dry electrode film formation technology, due to its advantages such as solvent-free operation, simple process, and environmental friendliness, has gradually become a research hotspot in the field of electrode manufacturing. Traditional wet film formation technology requires complex steps such as slurry coating and drying, resulting in problems such as high energy consumption, long production cycles, and solvent pollution. In contrast, dry film formation technology forms electrode films by directly pressing or spraying dry materials, significantly simplifying the process and reducing energy consumption.

[0003] However, existing dry film deposition equipment generally suffers from the following problems: when multiple continuous films are deposited, it is difficult to ensure the uniformity of the film layer; the equipment has insufficient control over the dispersion of material powder, resulting in unstable electrode performance; in addition, existing equipment has a complex structure, high maintenance costs, and poor width expansion capability, making it difficult to achieve large-scale and efficient production. The above problems seriously limit the industrial application of dry film deposition technology. Utility Model Content

[0004] This invention provides an electrode sheet dry film forming device and its feeding mechanism to solve the technical problem that existing dry film forming devices have poor width expansion capability and are difficult to achieve large-scale and efficient production.

[0005] The present invention provides a feeding mechanism for a dry film forming apparatus for electrode sheets, comprising:

[0006] A feeder, the lower part of which has a discharge port for discharging material;

[0007] The material distribution component is disposed at the feed inlet of the feeder and divides the feed inlet into at least two horizontally parallel material distribution ports. The material distribution component is movably disposed on the feeder to adjust the size of the material distribution ports.

[0008] A limiter is located below the feeding port. The limiter includes a support component and a plurality of limiting components installed on the support component and spaced laterally. A feeding channel is formed between two adjacent limiting components, and each feeding channel corresponds to a feeding port.

[0009] The lateral spacing between adjacent limiting components is adjustable to suit the size of the corresponding dispensing port.

[0010] In one embodiment of the present invention, the feeder is provided with a sliding track, the dispensing component has a support portion and is mounted on the sliding track via the support portion, and the dispensing component is reciprocated along the sliding track.

[0011] In one embodiment of the present invention, the sliding track is located on the outer wall of the feeder inlet, and the support part is a hook formed by bending upward, and the hook is hung on the sliding track.

[0012] In one embodiment of the present invention, the upper part of the material distribution component has an inclined guide surface, and the lateral dimension of the upper part of the material distribution component gradually increases from top to bottom.

[0013] In one embodiment of the present invention, the supporting component includes a first sliding rod arranged parallel to the sliding track, the limiting component is mounted on the first sliding rod and can be reciprocated along the first sliding rod, and a locking structure is provided between the limiting component and the first sliding rod, the locking structure being used to lock the position of the limiting component on the first sliding rod.

[0014] In one embodiment of the present invention, the lateral dimension of the feeding channel is greater than or equal to the lateral dimension of the dispensing port.

[0015] In one embodiment of the present invention, each of the material dispensing components is provided with a limiting component including two laterally spaced guide plates. Along the extension direction of the sliding track, the two guide plates have a first side facing away from each other. The material dispensing component has two second side facing away from each other perpendicular to the sliding track. The second side extends at most 20mm beyond the corresponding first side.

[0016] This utility model also provides an electrode sheet dry film forming apparatus, including a film forming roller group and a feeding mechanism of the electrode sheet dry film forming apparatus as described above. The film forming roller group is located below the limiter. The film forming roller group includes a film forming roller and a fixed roller. A roller gap inlet is formed between the film forming roller and the fixed roller. The limiter divides the roller gap inlet laterally into multiple feed ports. Each feed port corresponds to a feed channel. The limiter has arc-shaped recesses that correspond to the outer circular surfaces of the film forming roller and the fixed roller, respectively.

[0017] In one embodiment of the present invention, each of the feed inlets is provided with a corresponding cutting module, the cutting module being disposed downstream of the limiter, and each cutting module comprising two laterally spaced disc cutters and an adjustment component for adjusting the distance between the two disc cutters.

[0018] In one embodiment of the present invention, the adjustment assembly includes a gear and a first rack and a second rack that mesh with the gear simultaneously. The first rack is connected to one of the disc cutters via a transition structure, and the second rack is connected to the other disc cutter via another transition structure. The disc cutter and the transition structure are axially fixed but circumferentially rotatable relative to each other.

[0019] Alternatively, the adjustment assembly includes a rotating arm, a connecting structure, and two connecting rods. The rotating arm is located between the two connecting rods and has a first end and a second end. The first end of the rotating arm is hinged to the end of one of the connecting rods, and the second end of the rotating arm is hinged to the end of the other connecting rod. One end of the connecting rod is hinged to the rotating arm, and the other end of the connecting rod is hinged to the connecting structure. The connecting rod is connected to the disc cutter through the connecting structure. The disc cutter and the connecting structure are axially fixedly connected and can rotate relative to each other in the circumferential direction.

[0020] The beneficial effects of this utility model are as follows: The electrode sheet dry film forming device and its feeding mechanism proposed in this utility model, by setting up a material distribution component and a limiter that cooperates with the material distribution component, when two or more electrode films are produced at the same time, can allow the material in the material feeder to enter the corresponding feeding channel respectively, so as to realize the synchronous feeding of two or more electrode films and improve the efficiency of electrode film production. At the same time, the material distribution component can be laterally moved on the feeder, and the lateral spacing between adjacent limiter components is adjustable, which improves the flexibility of the feeding mechanism in distributing material and the adaptability to different electrode film width specifications. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram of a feeding device for a dry film forming apparatus for electrode sheets provided in one embodiment of the present invention, which includes a material dispensing component.

[0024] Figure 2 This is a cross-sectional structural diagram of a feeder with a material dispensing component provided in the feeder of the dry film forming apparatus for electrode sheets provided in one embodiment of the present invention;

[0025] Figure 3 for Figure 1 Enlarged structural diagram at point A;

[0026] Figure 4 This is a side view of the electrode sheet dry film forming apparatus provided in one embodiment of the present invention;

[0027] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0028] Figure 6 This is a schematic diagram of the structure of a feeder with two material dispensing components in an embodiment of the electrode sheet dry film forming apparatus provided by this utility model;

[0029] Figure 7 This is a cross-sectional structural diagram of the feeder with two material dispensing components in an embodiment of the electrode sheet dry film forming apparatus provided by this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of a cutter module with a rotating arm provided in one embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of a cutter module with gears and racks provided in one embodiment of the present invention.

[0032] The attached figures are labeled as follows: feeder 1, sliding track 101, limiter 2, first sliding rod 201, guide plate 202, material distribution component 3, support part 301, film forming roller 4, fixed roller 5, disc cutter 6, rotating arm 7, connecting rod 8, transfer structure 9, gear 10, first rack 11, second rack 12, connecting structure 13, bolt 14. Detailed Implementation

[0033] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0035] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention can be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention. In this application, the feeder has a cavity for receiving work material, the cavity being the internal space of the feeder, and the portion outside the internal space being the feeder itself. In the height direction of the feeder, the portion of the feeder away from the discharge port is the upper part of the feeder, and the portion of the feeder from the discharge port is the lower part of the feeder.

[0036] Please see Figures 1 to 7 As shown, this utility model provides a feeding mechanism for a dry film forming apparatus for electrode sheets, including a feeder 1, a distributing component 3, and a limiter 2. The feeder 1 has a discharge port at its lower part for discharging material. The distributing component 3 is disposed at the discharge port of the feeder 1 and divides the discharge port into at least two horizontally parallel distributing ports. The distributing component 3 is laterally movable on the feeder 1 to adjust the size of the distributing ports. The limiter 2 is located below the discharge port and includes a supporting component and a plurality of limiting components mounted on the supporting component and arranged laterally at intervals. A feeding channel is formed between two adjacent limiting components, and each feeding channel corresponds to a distributing port. The lateral spacing between adjacent limiting components is adjustable to adapt to the size of the corresponding distributing port. By setting up a material distribution component 3 and a limiter 2 that cooperates with the material distribution component 3, when two or more electrode films are produced simultaneously, the material in the material feeder 1 can enter the corresponding feeding channel to achieve synchronous feeding of two or more electrode films, thereby improving the efficiency of electrode film production. At the same time, the material distribution component 3 can be laterally moved on the feeder 1, and the lateral spacing between adjacent limiters is adjustable, which improves the flexibility of the feeding mechanism in distributing material and the adaptability to different electrode film width specifications.

[0037] like Figures 3 to 5 As shown, the feeder 1 is equipped with a sliding rail 101, and the distributing component 3 has a support part 301, which is mounted on the sliding rail 101. The distributing component 3 can reciprocate along the sliding rail 101. The sliding rail 101 guides the movement direction of the distributing component 3. The structure is simple and easy to assemble and disassemble. The distributing component 3 can be removed or added through the end of the sliding rail 101 to adjust the number and size of the distributing ports at the discharge port.

[0038] In this embodiment, the sliding track 101 is located on the outer wall of the feeder 1's discharge port, and the support part 301 is a hook formed by bending upwards, which is hooked onto the sliding track 101. The sliding track 101 is located outside the feeder 1, thus preventing material from entering the sliding track 101 during the feeding process and causing the support part 301 to become stuck when sliding on the sliding track 101. The upward-bending hook, hooked onto the sliding track 101, improves the stability of the sliding connection between the sliding track 101 and the support part 301.

[0039] like Figure 2 and Figure 6 As shown, the upper part of the material distribution component 3 has an inclined guide surface, and the lateral dimension of the upper part of the material distribution component 3 gradually increases from top to bottom. By setting the guide surface, the material can be guided into the corresponding distribution port in the feeder 1, which helps to avoid some material being stuck in the upper part of the material distribution component, and thus helps to make full use of the material in the feeder 1 and reduce the waste of raw materials. In this embodiment, the upper part of the material distribution component 3 has two axially symmetrically arranged guide surfaces, the center line of symmetry of the two guide surfaces extends along the height direction of the feeder, and the material distribution tip formed by the contact of the two guide surfaces faces the top of the feeder. This allows the material to enter the distribution ports at both ends of the material distribution component 3 more evenly.

[0040] like Figure 1 and Figure 3 As shown, specifically, the supporting component includes a first sliding rod 201 arranged parallel to the sliding rail 101. A limiting component is mounted on the first sliding rod 201 and can reciprocate along the first sliding rod 201. A locking structure is provided between the limiting component and the first sliding rod 201 to lock the position of the limiting component on the first sliding rod 201. The first sliding rod 201 is provided with several scales, which allow for relatively precise adjustment of the position of the limiting component. In this embodiment, a sliding hole is provided on the limiting component, and the first sliding rod 201 passes through the sliding hole, so the limiting component can slide on the first sliding rod 201. To increase the stability of the limiting component, two parallel first sliding rods 201 can be provided, with each sliding rod passing through a corresponding sliding hole on the limiting component. The limiting component is also provided with a screw hole, which is connected to the sliding hole. The bolt 14 passes through the screw hole and is screwed into the screw hole. By adjusting the relative position between the bolt 14 and the first sliding rod 201, the limiting component can be locked or unlocked on the first sliding rod 201.

[0041] In this embodiment, the lateral dimension of the feeding channel is greater than or equal to the lateral dimension of the dispensing port. This prevents material from accumulating at the limiting components, thus avoiding material waste. In this embodiment, each dispensing component 3 has two laterally spaced guide plates 202 as corresponding limiting components. The guide plates 202 allow for easy adjustment of the spacing between adjacent feeding channels. Along the extension direction of the sliding track 101, the two guide plates 202 have first sides facing away from each other. The dispensing component 3 has two second sides perpendicular to the sliding track 101, each second side extending at most 20mm beyond the corresponding first side. This ensures a more uniform distribution of material entering the feeding channel, preventing the electrode film from becoming loose near the edge of the limiting components due to insufficient material. In this embodiment, the discharge port has a laterally extending elongated cross-section. The limiting components at both ends of the discharge port, since they only guide the material and do not need to consider the spacing between adjacent electrode films, can consist of only one guide plate 202, unlike the limiting components with two guide plates 202 mentioned above.

[0042] In some embodiments, the limiting component is a single piece, and its lateral width serves as the spacing between adjacent feed channels. To accommodate different spacings between adjacent feed channels, the limiting component has multiple lateral width specifications for replacement. Similarly, the material separating component 3 also has multiple lateral width specifications to adapt to different usage requirements.

[0043] This invention also proposes a dry film-forming apparatus for electrode sheets, including a film-forming roller assembly and a feeding mechanism as described above. The film-forming roller assembly is located below the limiter 2 and includes a film-forming roller 4 and a stationary roller 5. A roller gap inlet is formed between the film-forming roller 4 and the stationary roller 5. A guide plate 202 laterally divides the roller gap inlet into multiple feed ports, each corresponding to a feed channel. The guide plate 202 has arc-shaped recesses corresponding to the outer surfaces of the film-forming roller 4 and the stationary roller 5. By dividing the roller gap inlet laterally into multiple feed ports through the guide plate 202, the width of the electrode film after the material is pressed by the film-forming roller 4 and the stationary roller 5 can be limited.

[0044] Each feed inlet is equipped with a corresponding cutting module, located downstream of the limiter 2. Each cutting module includes two laterally spaced disc cutters 6 and an adjustment component for adjusting the distance between the two disc cutters 6. During the subsequent pressing process, the width of the electrode film may change slightly. The cutting module can trim the edges of the electrode film to ensure that the width of the electrode film meets the requirements.

[0045] like Figure 8 and Figure 9As shown, in this embodiment, the dry film forming apparatus for the electrode sheet includes a second sliding rod arranged parallel to the sliding track 101. The cutter module is laterally slidably mounted on the second sliding rod, which has several graduations. These graduations allow for precise adjustment of the width between the two disc cutters 6 in the cutter module. Considering that the cutter module needs to be aligned with the feed inlet, the zero points of the first sliding rod 201 and the second sliding rod must be aligned in the width direction of the electrode film during use to facilitate subsequent adjustments.

[0046] In this embodiment, the adjustment assembly includes a gear 10 and a first rack 11 and a second rack 12 that mesh with the gear 10. The first rack 11 is connected to one of the disc cutters 6 via a transition structure 9, and the second rack 12 is connected to the other disc cutter 6 via another transition structure 9. The disc cutter 6 is axially fixed to the transition structure 9, but can rotate relative to it in the circumferential direction. Through the cooperation of the gear 10, the first rack 11, and the second rack 12, rotating the gear 10 simultaneously drives the first rack 11 and the second rack 12 to move, thereby causing the first rack 11 and the second rack 12 to move closer to or further away from each other via the transition structure 9. The transition structure 9 includes a first limiting member and a first limiting rod. The first limiting member has a first limiting hole extending laterally, and the first limiting rod passes through the first limiting hole and can reciprocate along the axial direction of the first limiting hole to drive the disc cutter 6 to move laterally. The center of the disc cutter 6 is axially fixed to one end of the first limiting rod, but can rotate relative to it circumferentially. The other end of the first limiting rod is equipped with an adjusting block connected to a rack. The adjusting block is used to adjust the relative position between the two disc cutters 6 in a cutting module, so that the centers of the two disc cutters 6 coincide laterally. Each of the aforementioned first limiting members is provided with a first connecting part that can slide along the axial direction of the second sliding rod. The first connecting part may have a sliding hole for the second sliding rod to pass through, or the first connecting part may be hook-shaped and hooked onto the second sliding rod. Simultaneously, the first connecting part can also be locked onto the second sliding rod by the aforementioned locking structure. The shape of the first connecting part can be adjusted according to actual usage needs.

[0047] In some embodiments, the adjustment assembly includes a rotating arm 7, a connecting structure 13, and two connecting rods 8. The rotating arm 7 is located between the two connecting rods 8 and has a first end and a second end. The first end of the rotating arm 7 is hinged to the end of one connecting rod 8, and the second end of the rotating arm 7 is hinged to the end of the other connecting rod 8. One end of the connecting rod 8 is hinged to the rotating arm 7, and the other end of the connecting rod 8 is hinged to the connecting structure 13. The connecting rod 8 is connected to the disc cutter 6 through the connecting structure 13. The disc cutter 6 and the connecting structure 13 are axially fixedly connected and can rotate relative to each other in the circumferential direction. The connecting structure 13 includes a second limiting member and a second limiting rod. The second limiting member has a second limiting hole extending laterally, and the second limiting rod passes through the second limiting hole. One end of the second limiting rod is fixedly connected to the first end of the L-shaped connecting rod 8, and the other end of the second limiting rod is hinged to the connecting rod 8. A rotating shaft is provided on the second end of the L-shaped connecting rod 8. The center of the disc cutter 6 is axially fixedly connected to the rotating shaft and can rotate relative to each other in the circumferential direction. The second limiting member is provided with a second connecting part for sliding connection with the second sliding rod. The second connecting part is configured in the same way as the first connecting part, and will not be described again here. A suction device is provided on the side of the disc cutter 6 away from the electrode film. The suction device is used to collect the waste material cut off from the electrode film.

[0048] In another embodiment, the adjustment assembly includes a mounting rod and two linear motors. The two linear motors are disposed at both ends of the mounting rod. The linear motors and the disc cutter 6 are arranged in a one-to-one correspondence. The disc cutter 6 is axially fixedly connected to the output shaft of the linear motor and can rotate relative to it in the circumferential direction.

[0049] like Figure 1 and Figure 2 The diagram shown is a schematic representation of a material distribution component 3 provided at the feed inlet of the feeder 1 in one embodiment. Figure 6 and Figure 7 This is a schematic diagram of a structure in one embodiment where two material distribution components 3 are provided at the feed inlet of the feeder 1. The material distribution components 3 are mounted on the sliding rail 101 via a support 301. The material distribution components 3 can be loaded and unloaded through both ends of the sliding rail 101 to adjust the number of material distribution components 3 on the feeder. This facilitates operation and improves the adaptability of the dry electrode film forming apparatus to different electrode film widths. For example, after producing two electrode films simultaneously using the dry electrode film forming apparatus, if a smaller electrode film is required, a material distribution component 3 can be added to the feeder to achieve the purpose of producing three electrode films simultaneously. This not only satisfies the goal of reducing the electrode film width but also allows for the simultaneous production of three electrode films, thus improving the production efficiency of the electrode films.

[0050] In summary, by setting up the material distribution component 3 and the limiter 2 that cooperates with the material distribution component 3, when two or more electrode films are produced simultaneously, the materials in the material feeder 1 can enter the corresponding feeding channels respectively, so as to realize the synchronous feeding of two or more electrode films and improve the production efficiency of electrode films. At the same time, the material distribution component 3 can be laterally moved on the feeder 1, and the lateral spacing between adjacent limiters is adjustable, which improves the flexibility of the feeding mechanism in distributing materials and the adaptability to different electrode film width specifications.

[0051] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A feeding mechanism for a dry film forming apparatus for electrode sheets, characterized in that, include: A feeder, the lower part of which has a discharge port for discharging material; The material distribution component is disposed at the feed inlet of the feeder and divides the feed inlet into at least two horizontally parallel material distribution ports. The material distribution component is movably disposed on the feeder to adjust the size of the material distribution ports. A limiter is located below the feeding port. The limiter includes a support component and a plurality of limiting components installed on the support component and spaced laterally. A feeding channel is formed between two adjacent limiting components, and each feeding channel corresponds to a feeding port. The lateral spacing between adjacent limiting components is adjustable to suit the size of the corresponding dispensing port.

2. The feeding mechanism of the electrode sheet dry film forming apparatus according to claim 1, characterized in that: The feeder is provided with a sliding track, the dispensing component has a support part and is mounted on the sliding track through the support part, and the dispensing component is reciprocated along the sliding track.

3. The feeding mechanism of the electrode sheet dry film forming apparatus according to claim 2, characterized in that: The sliding track is located on the outer wall of the feeder inlet, and the support part is a hook formed by bending upward, which is hung on the sliding track.

4. The feeding mechanism of the electrode sheet dry film forming apparatus according to claim 1, characterized in that: The upper part of the material distribution component has an inclined guide surface, and the lateral dimension of the upper part of the material distribution component gradually increases from top to bottom.

5. The feeding mechanism of the electrode sheet dry film forming apparatus according to claim 1, characterized in that: The supporting component includes a first sliding rod arranged parallel to the sliding track. The limiting component is installed on the first sliding rod and can be adjusted back and forth along the first sliding rod. A locking structure is provided between the limiting component and the first sliding rod. The locking structure is used to lock the position of the limiting component on the first sliding rod.

6. The feeding mechanism of the electrode sheet dry film forming apparatus according to any one of claims 1-5, characterized in that: The lateral dimension of the feed channel is greater than or equal to the lateral dimension of the feed outlet.

7. The feeding mechanism of the electrode sheet dry film forming apparatus according to any one of claims 1-5, characterized in that: Each of the material dispensing components is provided with a corresponding limiting component including two laterally spaced guide plates along the extension direction of the sliding track. The two guide plates have a first side facing away from each other. The material dispensing component has two second side facing away from each other perpendicular to the sliding track. The second side extends at most 20mm beyond the corresponding first side.

8. An apparatus for dry film formation of electrode sheets, characterized in that, The device includes a film-forming roller assembly and a feeding mechanism for a dry film-forming apparatus for electrode sheets as described in any one of claims 1-7. The film-forming roller assembly is located below the limiter. The film-forming roller assembly includes a film-forming roller and a stationary roller. A roller gap inlet is formed between the film-forming roller and the stationary roller. The limiter divides the roller gap inlet laterally into multiple feed ports. Each feed port corresponds to a feed channel. The limiter has arc-shaped recesses that correspond to the outer circular surfaces of the film-forming roller and the stationary roller, respectively.

9. The electrode sheet dry film formation apparatus according to claim 8, characterized in that: Each of the feed inlets is provided with a corresponding cutting module, which is located downstream of the limiter. Each cutting module includes two laterally spaced disc cutters and an adjustment component for adjusting the distance between the two disc cutters.

10. The electrode sheet dry film formation apparatus according to claim 9, characterized in that: The adjustment assembly includes a gear and a first rack and a second rack that mesh with the gear simultaneously. The first rack is connected to one of the disc cutters via a transition structure, and the second rack is connected to the other disc cutter via another transition structure. The disc cutters are axially fixed to the transition structures, but can rotate relative to each other in the circumferential direction. Alternatively, the adjustment assembly includes a rotating arm, a connecting structure, and two connecting rods. The rotating arm is located between the two connecting rods and has a first end and a second end. The first end of the rotating arm is hinged to the end of one of the connecting rods, and the second end of the rotating arm is hinged to the end of the other connecting rod. One end of the connecting rod is hinged to the rotating arm, and the other end of the connecting rod is hinged to the connecting structure. The connecting rod is connected to the disc cutter through the connecting structure. The disc cutter and the connecting structure are axially fixedly connected and can rotate relative to each other in the circumferential direction.

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