Dry electrode film using inclined single screw extruder

Abstract

The application relates to a dry-process electrode film piece inclined single-screw extruder, belonging to the technical field of battery production, which comprises a base, a cylinder, a rotating motor, a screw and an extrusion die head. An inclined mounting surface is formed on the top surface of the base, the cylinder is fixed on the mounting surface, a feeding port is arranged on the side surface of the first end with a higher horizontal height of the cylinder, and a discharging port is arranged on the end surface of the second end with a lower horizontal height of the cylinder. The dry-process electrode film piece inclined single-screw extruder can reduce the overall floor area of the extruder, fully utilize the gravity of the powder itself, improve the flowability of the powder, and improve the production efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery production, in particular to a dry-process electrode film piece inclined single-screw extruder. BACKGROUND

[0002] The production process of a battery electrode includes a wet process and a dry process. The organic solvent used in the wet process has the disadvantages of high energy consumption, heavy pollution and limited electrode thickness. The dry process can avoid the use of solvents when preparing lithium batteries, and has incomparable advantages over the wet process in reducing battery cost and improving battery performance.

[0003] The existing mainstream manufacturing technology of the dry-process electrode adopts a polytetrafluoroethylene fibrillation route. One of the important ways of the film forming process is to use screw extrusion. However, the existing dry-process electrode mass production supporting equipment is not mature. The screw extrusion processing equipment mostly adopts a horizontal double-screw extrusion device. The volume is relatively bulky, the discharge extrusion die is troublesome to disassemble, and the material flowability is poor. There are problems of large occupied space and low production efficiency. SUMMARY

[0004] Therefore, it is necessary to provide a dry-process electrode film piece inclined single-screw extruder to solve the technical problems of large occupied space and low production efficiency of the screw extruder in the prior art.

[0005] To achieve the above-mentioned purpose, the application provides a dry-process electrode film piece inclined single-screw extruder, which comprises:

[0006] A base, the top surface of which is formed with an inclined mounting surface;

[0007] A cylinder fixed to the mounting surface, the side surface of the first end of which with a higher horizontal height is provided with a feeding port, and the end surface of the second end of which with a lower horizontal height is provided with a discharging port. A material channel for accommodating powder is arranged between the feeding port and the discharging port;

[0008] A rotating motor arranged on the end surface of the first end, the rotating motor shaft of which penetrates the first end and extends into the material channel;

[0009] A screw arranged in the material channel and connected with the rotating motor shaft, the screw being used for extruding the powder from the feeding port to the discharging port; and

[0010] An extrusion die arranged at the discharging port in a detachable manner, the powder being extruded into a film body through the extrusion die.

[0011] Optionally, the base comprises:

[0012] A base plate;

[0013] A first support plate is detachably arranged at one end of the top surface of the bottom plate, and the top of the first support plate is provided with a first notch matching the first end.

[0014] A second support plate is detachably arranged at the other end of the top surface of the bottom plate, the height of the first support plate is greater than the height of the second support plate, and the top of the second support plate is provided with a second notch matching the second end.

[0015] Optionally, the end surface of the first end is further provided with a support, the support is in the shape of a circular arc, and the support is used to support the rotating motor.

[0016] Optionally, a feeding pipe is arranged at the feeding port.

[0017] Optionally, a connecting flange is arranged at the port of the feeding pipe.

[0018] Optionally, the extrusion die comprises:

[0019] A sleeve is screwed at the discharge port, one end of the sleeve close to the barrel is a proximal end, and the other end of the sleeve away from the barrel is a distal end, the inner wall surface of the sleeve is provided with a stroke groove, the stroke groove penetrates the end surface of the proximal end, and the stroke groove does not penetrate the end surface of the distal end; and

[0020] A die is arranged in the sleeve, and the side surface of the die is provided with a sliding block matched with the stroke groove.

[0021] Optionally, the stroke groove comprises a first stroke groove, a second stroke groove and a third stroke groove, the length of the first stroke groove is greater than the length of the second stroke groove;

[0022] The die comprises a diaphragm extrusion die, a first screen mesh die and a second screen mesh die, the diaphragm extrusion die, the first screen mesh die and the second screen mesh die are arranged at intervals, the first screen mesh die and the second screen mesh die are arranged on the side of the diaphragm extrusion die facing the proximal end, the side surface of the diaphragm extrusion die is provided with a first sliding block matched with the first stroke groove, the side surface of the first screen mesh die is provided with a second sliding block matched with the second stroke groove, and the side surface of the second screen mesh die is provided with a third sliding block matched with the third stroke groove.

[0023] Optionally, the first stroke groove, the second stroke groove and the third stroke groove are provided with four respectively, the first stroke groove, the second stroke groove and the third stroke groove form four groups of groove structures, each group of groove structures comprises one first stroke groove, one second stroke groove and one third stroke groove, the first stroke groove, the second stroke groove and the third stroke groove of each group of groove structures overlap together, the depth of the first stroke groove is less than the depth of the second stroke groove, and the depth of the second stroke groove is less than the depth of the third stroke groove.

[0024] Optionally, the first stroke groove is provided with a first through hole communicating with the outer surface of the barrel away from the end of the proximal end, the second stroke groove is provided with a second through hole communicating with the outer surface of the barrel away from the end of the proximal end, the third stroke groove is provided with a third through hole communicating with the outer surface of the barrel away from the end of the proximal end, and the extrusion die further comprises an electromagnetic mechanism arranged on the barrel, the electromagnetic mechanism comprising a first magnetic suction end arranged in the first through hole, a second magnetic suction end arranged in the second through hole and a third magnetic suction end arranged in the third through hole, and the first slider corresponding to the first magnetic suction end, the second slider corresponding to the second magnetic suction end and the third slider corresponding to the third magnetic suction end are all embedded with magnetic metal blocks.

[0025] Optionally, the size of the screen hole on the first screen mold is larger than the size of the screen hole on the second screen mold.

[0026] The dry electrode film piece inclined single screw extruder provided by the application has the advantages that compared with the prior art, the dry electrode film piece inclined single screw extruder comprises a base, a barrel, a rotary motor, a screw and an extrusion die, the barrel is fixed on the base in an inclined manner, and the height of the feeding port is higher than that of the discharging port, so that the overall floor area of the extruder can be reduced, and the flowability of the powder can be improved by fully utilizing the gravity of the powder, thereby improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Figure 1 The dry electrode film piece inclined single screw extruder provided by the application has the advantages that compared with the prior art, the dry electrode film piece inclined single screw extruder comprises a base, a barrel, a rotary motor, a screw and an extrusion die, the barrel is fixed on the base in an inclined manner, and the height of the feeding port is higher than that of the discharging port, so that the overall floor area of the extruder can be reduced, and the flowability of the powder can be improved by fully utilizing the gravity of the powder, thereby improving the production efficiency.

[0029] Figure 2 The dry electrode film piece inclined single screw extruder provided by the application has the advantages that compared with the prior art, the dry electrode film piece inclined single screw extruder comprises a base, a barrel, a rotary motor, a screw and an extrusion die, the barrel is fixed on the base in an inclined manner, and the height of the feeding port is higher than that of the discharging port, so that the overall floor area of the extruder can be reduced, and the flowability of the powder can be improved by fully utilizing the gravity of the powder, thereby improving the production efficiency.

[0030] Figure 3 The dry electrode film piece inclined single screw extruder provided by the application has the advantages that compared with the prior art, the dry electrode film piece inclined single screw extruder comprises a base, a barrel, a rotary motor, a screw and an extrusion die, the barrel is fixed on the base in an inclined manner, and the height of the feeding port is higher than that of the discharging port, so that the overall floor area of the extruder can be reduced, and the flowability of the powder can be improved by fully utilizing the gravity of the powder, thereby improving the production efficiency.

[0031] Figure 4 The dry electrode film piece inclined single screw extruder provided by the application has the advantages that compared with the prior art, the dry electrode film piece inclined single screw extruder comprises a base, a barrel, a rotary motor, a screw and an extrusion die, the barrel is fixed on the base in an inclined manner, and the height of the feeding port is higher than that of the discharging port, so that the overall floor area of the extruder can be reduced, and the flowability of the powder can be improved by fully utilizing the gravity of the powder, thereby improving the production efficiency.

[0032] Explanation of reference signs:

[0033] 1. Base; 110. Base plate; 120. First support plate; 130. Second support plate; 131. Second notch;

[0034] 2. Cylinder body; 210. Inlet; 220. Outlet; 230. Inlet pipe; 240. Connecting flange; 250. Connecting cylinder; 251. External thread; 252. Annular flange; 260. Sealing ring;

[0035] 3. Rotary motor;

[0036] 4. Screw;

[0037] 5. Extrusion die head; 510. Sleeve; 511. First stroke groove; 512. Second stroke groove; 513. Third stroke groove; 514. First through hole; 515. Second through hole; 516. Third through hole; 517. Internal thread; 518. Force plate; 520. Diaphragm extrusion die; 521. First slider; 530. First screen die; 531. Second slider; 540. Second screen die; 541. Third slider; 550. Electromagnetic mechanism; 551. First magnetic end; 552. Second magnetic end; 553. Third magnetic end; 560. Magnetic metal block;

[0038] 6. Support components. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0045] The embodiments of this application provide a slanted single-screw 4-type extruder for dry electrode films, please refer to the following: Figures 1 to 4The dry electrode film piece inclined single screw 4 extruder includes a base 1, a barrel 2, a rotating motor 3, a screw 4 and an extrusion die 5, the top surface of the base 1 is formed with an inclined mounting surface, the barrel 2 is fixed on the mounting surface, the side surface of the first end of the barrel 2 with a higher horizontal height is provided with a feeding port 210, the end surface of the second end of the barrel 2 with a lower horizontal height is provided with a discharging port 220, the feeding port 210 and the discharging port 220 are provided with a material channel for accommodating the powder; the rotating motor 3 is arranged on the end surface of the first end, the rotating shaft of the rotating motor 3 penetrates through the first end and extends into the material channel; the screw 4 is arranged in the material channel and connected with the rotating shaft, the screw 4 is used for extruding the powder from the feeding port 210 to the discharging port 220; the extrusion die 5 is detachably arranged at the discharging port 220, the powder is extruded into a film body through the extrusion die 5.

[0046] In the embodiment of the application, the dry electrode film piece inclined single screw 4 extruder includes a base 1, a barrel 2, a rotating motor 3, a screw 4 and an extrusion die 5, the barrel 2 is fixed on the base 1 in an inclined manner, the height of the feeding port 210 is higher than that of the discharging port 220, which can reduce the overall floor area of the extruder on one hand, and can fully utilize the gravity of the powder itself to improve the flowability of the powder, thereby improving the production efficiency.

[0047] In one embodiment, please refer to Figure 1 and Figure 2 , the base 1 includes a bottom plate 110, a first support plate 120 and a second support plate 130, the first support plate 120 is detachably arranged at one end of the top surface of the bottom plate 110, the top of the first support plate 120 is provided with a first notch adapted to the first end; the second support plate 130 is detachably arranged at the other end of the top surface of the bottom plate 110, the height of the first support plate 120 is greater than that of the second support plate 130, and the top of the second support plate 130 is provided with a second notch 131 adapted to the second end.

[0048] Through the above arrangement, the barrel 2 is fixed in an inclined manner by the first support plate 120 and the second support plate 130 with different heights, and the top of the first support plate 120 is provided with a first notch adapted to the first end, and the top of the second support plate 130 is provided with a second notch 131 adapted to the second end, so that the barrel 2 can be better fitted on the base 1, and the structure is more stable.

[0049] In one embodiment, please refer to Figure 1 and Figure 2 , the end surface of the first end is further provided with a support 6, the support 6 is in a circular arc shape, and the support 6 is used for supporting the rotating motor 3 to improve the stability of the rotating motor 3, thereby ensuring that the screw 4 can stably rotate.

[0050] In one embodiment, please refer to Figure 1And Figure 2 A feeding pipe 230 is arranged at the feeding port 210 to facilitate connection of other devices at the feeding port 210.

[0051] In one embodiment, referring to Figure 1 And Figure 2 A connecting flange 240 is arranged at the port of the feeding pipe 230 to facilitate connection of other devices at the feeding port 210.

[0052] In one embodiment, referring to Figure 3 The extrusion die 5 comprises a sleeve 510 and a die, the sleeve 510 is screwed at the discharging port 220, the sleeve 510 has a proximal end close to one end of the barrel 2 and a distal end away from the other end of the barrel 2, a stroke groove is arranged on the inner wall surface of the sleeve 510, the stroke groove penetrates the end surface of the proximal end, and the stroke groove does not penetrate the end surface of the distal end, the die is arranged in the sleeve 510, and a sliding block matched with the stroke groove is arranged on the side surface of the die.

[0053] Through the above arrangement, the die abuts against the end of the stroke groove, and the die tends to move towards the distal end under the action of the powder extrusion, so as to make the die stable at the end of the stroke groove.

[0054] In other embodiments, a connecting barrel 250 is arranged at the discharging port 220, an outer thread 251 is arranged on the outer peripheral surface of the distal end of the connecting barrel 250 away from the barrel 2, and an inner thread 517 matched with the outer thread 251 is arranged on the inner peripheral surface of the proximal end of the sleeve 510, so as to realize the threaded connection between the sleeve 510 and the barrel 2; an annular stop 252 is further arranged on the middle part of the outer peripheral surface of the connecting barrel 250, and a sealing ring 260 is further arranged on the connecting barrel 250, the sealing ring 260 is clamped and pressed between the annular stop 252 and the sleeve 510, so as to improve the sealing performance of the connecting part between the barrel 2 and the sleeve 510.

[0055] In other embodiments, a stress plate 518 is arranged on the outer peripheral surface of the sleeve 510, when the sleeve 510 is screwed on the barrel 2, the stress plate 518 can provide a larger stress contact area for the workers, so as to facilitate the assembly of parts.

[0056] Further, the stress plate 518 is provided with two, and the two stress plates 518 are symmetrically arranged on the outer peripheral surface of the sleeve 510.

[0057] In one embodiment, referring to Figure 3The stroke grooves include a first stroke groove 511, a second stroke groove 512, and a third stroke groove 513, and the length of the first stroke groove 511 is greater than the length of the second stroke groove 512. The mold includes a diaphragm extrusion mold 520, a first screen mold 530, and a second screen mold 540, and the diaphragm extrusion mold 520, the first screen mold 530, and the second screen mold 540 are arranged at intervals in sequence. The first screen mold 530 and the second screen mold 540 are both arranged on the side of the diaphragm extrusion mold 520 facing the proximal end. The side surface of the diaphragm extrusion mold 520 is provided with a first sliding block 521 matched with the first stroke groove 511. The side surface of the first screen mold 530 is provided with a second sliding block 531 matched with the second stroke groove 512. The side surface of the second screen mold 540 is provided with a third sliding block 541 matched with the third stroke groove 513.

[0058] Specifically, by setting the lengths of the first stroke groove 511, the second stroke groove 512, and the third stroke groove 513, the installation positions of the diaphragm extrusion mold 520, the first screen mold 530, and the second screen mold 540 are limited, which plays a certain positioning role and reduces the assembly difficulty of the extrusion die head 5.

[0059] Specifically, the first screen mold 530 and the second screen mold 540 can uniformly disperse the powder, improving the film forming quality of the powder.

[0060] In one embodiment, referring to Figure 3 The first stroke groove 511, the second stroke groove 512, and the third stroke groove 513 are respectively provided with four, and the first stroke groove 511, the second stroke groove 512, and the third stroke groove 513 form four groups of groove structures. Each group of groove structures includes one first stroke groove 511, one second stroke groove 512, and one third stroke groove 513. The first stroke groove 511, the second stroke groove 512, and the third stroke groove 513 of each group of groove structures overlap together. The depth of the first stroke groove 511 is less than the depth of the second stroke groove 512, and the depth of the second stroke groove 512 is less than the depth of the third stroke groove 513.

[0061] Therefore, the first stroke groove 511, the second stroke groove 512 and the third stroke groove 513 are respectively provided with four, which can improve the stability of the membrane extrusion die 520, the first screen mesh die 530 and the second screen mesh die 540 installation; and the first stroke groove 511, the second stroke groove 512 and the third stroke groove 513 overlap together, on the one hand, it can avoid too much cutting on the sleeve 510, improve the structural strength of the sleeve 510; on the other hand, it can also avoid the disorderly arrangement of the first stroke groove 511, the second stroke groove 512 and the third stroke groove 513, improve the aesthetic degree; on the other hand, it can also make the first magnetic suction end 551, the second magnetic suction end 552 and the third magnetic suction end 553 of the electromagnetic mechanism 550 described below linearly arranged, reduce the installation difficulty of the electromagnetic mechanism 550 on the cylindrical surface.

[0062] Further, the four groups of groove structures are uniformly distributed on the inner circumferential surface of the sleeve 510, so that the membrane extrusion die 520, the first screen mesh die 530 and the second screen mesh die 540 are more evenly stressed.

[0063] In one embodiment, please refer to Figure 3 and Figure 4 , the first stroke groove 511 is provided with a first through hole 514 communicating with the outer surface of the sleeve 2 at the end away from the proximal end, the second stroke groove 512 is provided with a second through hole 515 communicating with the outer surface of the sleeve 2 at the end away from the proximal end, the third stroke groove 513 is provided with a third through hole 516 communicating with the outer surface of the sleeve 2 at the end away from the proximal end, the extrusion die 5 further comprises an electromagnetic mechanism 550 arranged on the sleeve 2, the electromagnetic mechanism 550 comprises a first magnetic suction end 551 arranged in the first through hole 514, a second magnetic suction end 552 arranged in the second through hole 515 and a third magnetic suction end 553 arranged in the third through hole 516, the first slide block 521 corresponding to the first magnetic suction end 551, the second slide block 531 corresponding to the second magnetic suction end 552 and the third slide block 541 corresponding to the third magnetic suction end 553 are all embedded with magnetic metal blocks 560.

[0064] It can be understood that when fixing multiple dies in the sleeve 510 in the prior art, the sleeve 510 is usually separated into multiple split sleeves, and fixing structures are designed between adjacent split sleeves to fix the dies.

[0065] The present application does not need to cut the sleeve 510, but can fix multiple dies in the sleeve 510 at the same time by magnetic attraction, which reduces the assembly difficulty of the extrusion die 5, improves the integrity of the extrusion die 5, and improves the overall structural strength of the extrusion die 5.

[0066] Specifically, first, the electromagnetic mechanism 550 is in a closed state, the diaphragm extrusion die 520 is slid to the end of the first stroke groove 511, the first screen die 530 is slid to the end of the second stroke groove 512, and the second screen die 540 is slid to the end of the third stroke groove 513, so as to realize positioning of the diaphragm extrusion die 520, the first screen die 530 and the second screen die 540; then, the electromagnetic mechanism 550 is powered on, the first magnetic suction end 551, the second magnetic suction end 552 and the third magnetic suction end 553 generate magnetism, the magnetic metal block 560 of the first sliding block 521 and the first magnetic suction end 551 are magnetically attracted together, the magnetic metal block 560 of the second sliding block 531 and the second magnetic suction end 552 are magnetically attracted together, and the magnetic metal block 560 of the third sliding block 541 and the third magnetic suction end 553 are magnetically attracted together, so as to realize fixing of the diaphragm extrusion die 520, the first screen die 530 and the second screen die 540 respectively.

[0067] Alternatively, the first magnetic suction end 551, the second magnetic suction end 552 and the third magnetic suction end 553 of each electromagnetic mechanism 550 are independently controlled respectively, so that the diaphragm extrusion die 520, the first screen die 530 and the second screen die 540 can be installed in sequence, and the flexibility of assembly is improved.

[0068] Further, two electromagnetic mechanisms 550 are arranged symmetrically on the outer circumferential surface of the sleeve 510, so that the two electromagnetic mechanisms 550 respectively fix opposite ends of the diaphragm extrusion die 520, opposite ends of the first screen die 530 and opposite ends of the second screen die 540, and the stability of the structure is improved.

[0069] It can be understood that the number of electromagnetic mechanisms 550 is designed according to the force demand of each die in actual production, and the more the number of electromagnetic mechanisms 550, the more stable the die, which is not limited herein.

[0070] In an embodiment, please refer to Figure 3 The size of the screen hole on the first screen die 530 is greater than the size of the screen hole on the second screen die 540.

[0071] It can be understood that the size of the screen hole on the first screen die 530 and the size of the screen hole on the second screen die 540 are designed according to actual demand, and in other production conditions, the size of the screen hole on the first screen die 530 can also be smaller than the size of the screen hole on the second screen die 540, or the size of the screen hole on the first screen die 530 can also be equal to the size of the screen hole on the second screen die 540, which is not limited herein.

[0072] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0073] The above-described embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A dry electrode film patch inclined single screw extruder characterized by, The base is provided with an inclined mounting surface on the top surface thereof. The barrel is fixed to the mounting surface, and is provided with a feeding port on the side surface of the first end with a higher horizontal height, and is provided with a discharging port on the end surface of the second end with a lower horizontal height, and a material passage for accommodating powder is arranged between the feeding port and the discharging port. A rotary motor is arranged on the end surface of the first end, and the rotating shaft of the rotary motor penetrates through the first end and extends into the material passage. A screw rod is arranged in the material passage and is connected with the rotating shaft, and the screw rod is used for extruding the powder from the feeding port to the discharging port. An extrusion die is detachably arranged at the discharging port, and the powder is extruded into a film body through the extrusion die. The extrusion die comprises: a sleeve which is screwed at the discharging port, one end of the sleeve close to the barrel is a proximal end, and the other end of the sleeve away from the barrel is a distal end, an inner wall surface of the sleeve is provided with a stroke groove which penetrates through the end surface of the proximal end and does not penetrate through the end surface of the distal end; and a die which is arranged in the sleeve, and the side surface of the die is provided with a sliding block matched with the stroke groove. The stroke groove comprises a first stroke groove, a second stroke groove and a third stroke groove, and the length of the first stroke groove is greater than the length of the second stroke groove. The die comprises a diaphragm extrusion die, a first screen mesh die and a second screen mesh die, the diaphragm extrusion die, the first screen mesh die and the second screen mesh die are arranged at intervals, the first screen mesh die and the second screen mesh die are arranged on one side of the diaphragm extrusion die towards the proximal end, the side surface of the diaphragm extrusion die is provided with a first sliding block matched with the first stroke groove, the side surface of the first screen mesh die is provided with a second sliding block matched with the second stroke groove, and the side surface of the second screen mesh die is provided with a third sliding block matched with the third stroke groove. The first stroke groove, the second stroke groove and the third stroke groove are respectively provided with four, and the first stroke groove, the second stroke groove and the third stroke groove form four groups of groove structures, each group of groove structures comprises one first stroke groove, one second stroke groove and one third stroke groove, the first stroke groove, the second stroke groove and the third stroke groove of each group of groove structures overlap together, the depth of the first stroke groove is less than the depth of the second stroke groove, and the depth of the second stroke groove is less than the depth of the third stroke groove. ​ ​ The first stroke groove is provided with a first through hole communicating with the outer surface of the barrel far from the end of the proximal end, the second stroke groove is provided with a second through hole communicating with the outer surface of the barrel far from the end of the proximal end, the third stroke groove is provided with a third through hole communicating with the outer surface of the barrel far from the end of the proximal end, the extrusion die further comprises an electromagnetic mechanism arranged on the barrel, the electromagnetic mechanism comprises a first magnetic suction end arranged in the first through hole, a second magnetic suction end arranged in the second through hole and a third magnetic suction end arranged in the third through hole, the first slider corresponding to the first magnetic suction end, the second slider corresponding to the second magnetic suction end and the third slider corresponding to the third magnetic suction end are all embedded with magnetic metal blocks.

2. The dry electrode sheet for a slanted single-screw extruder according to claim 1, wherein The base comprises: a bottom plate; a first support plate, which is detachably arranged at one end of the top surface of the bottom plate, and the top of the first support plate is provided with a first notch matching the first end; and a second support plate, which is detachably arranged at the other end of the top surface of the bottom plate, and the height of the first support plate is greater than that of the second support plate, and the top of the second support plate is provided with a second notch matching the second end.

3. The dry electrode sheet for a slanted single-screw extruder according to claim 1, wherein The end surface of the first end is further provided with a support, which is in the shape of a circular arc, and the support is used to support the rotary motor.

4. The dry electrode film patch oblique single screw extruder according to any one of claims 1-3, characterized in that, A feeding pipe is arranged at the feeding port.

5. The dry electrode sheet slanted single screw extruder according to claim 4, wherein A connecting flange is arranged at the port of the feeding pipe.

6. The dry electrode sheet for a slanted single-screw extruder according to claim 1, wherein The size of the screen hole on the first screen mesh mold is greater than that of the screen hole on the second screen mesh mold.

Images