Screw extruder for fiberized electrode material

Abstract

The utility model relates to the technical field of extrusion equipment, in particular to a screw extruder for fiberized electrode materials, which comprises a rack, an extrusion mechanism arranged on the rack and a driving mechanism for driving the extrusion mechanism, the extrusion mechanism comprises an extrusion box body, and a plurality of screw rods are arranged in the extrusion box body; the extrusion box is provided with a feeding hopper, the feeding hopper is provided with a feeding cavity, at least one vibrating mechanism used for vibrating materials is arranged on the side, away from the feeding cavity, of the feeding hopper, and each vibrating mechanism comprises a vibrating disc arranged on the feeding hopper and a generating assembly used for driving the vibrating disc. Electrode materials bonded in the feeding hopper can be dispersed and shaken off through high-frequency vibration, a feeding port in the bottom of the hopper is prevented from being blocked, and compared with a traditional stirring method, mechanical vibration is lower in power consumption, small in noise and higher in dispersion effect on the electrode materials; and the vibration disc does not occupy the space of the feeding cavity of the feeding hopper, so that the feeding speed can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of extrusion equipment, and in particular to a screw extruder for fiberizing electrode materials. Background Art

[0002] The dry electrode process applies shear force to the solid electrolyte particles to deform them, which can significantly increase their coverage on the active particles, and has gradually become the mainstream process for electrode production. The dry electrode process route requires the dry electrode material to be highly fiberized to form a uniform self-supporting film. Its adhesive is mostly polytetrafluoroethylene-based materials, and the fiberization process has very high requirements on the shear and plasticization capabilities of the equipment.

[0003] At present, fiberization generally adopts screw extruders. Screw extruders rely on the pressure and shear force generated by the rotation of the screw to fully and evenly plasticize and mix the materials. In particular, three-screw extruders can achieve better mixing and kneading under the condition of a smaller screw aspect ratio, thereby improving shear efficiency and plasticizing effect. However, the material fluidity of polytetrafluoroethylene is poor. When feeding through the hopper, it is easy to cause hopper blockage and material adhesion to the inner wall. The structure of the three-screw extruder is more complicated than that of the single-screw and twin-screw extruders, and its maintenance and cleaning are very difficult.

[0004] Conventional screw extruders add a stirring mechanism in the hopper to continuously stir the material to prevent it from sticking and clogging. However, the motor-driven stirring is not effective in dispersing agglomerated materials. Moreover, the presence of the stirring mechanism in the hopper will inevitably reduce the available space in the hopper, affecting the feeding speed. Utility Model Content

[0005] In order to improve the problem that the stirring mechanism in the related art has a poor dispersion effect on materials and affects the feeding speed, the utility model provides a screw extruder for fiberizing electrode materials.

[0006] A screw extruder for fiberizing electrode materials comprises a frame, an extrusion mechanism arranged on the frame, and a driving mechanism for driving the extrusion mechanism; the extrusion mechanism comprises an extrusion box, in which a plurality of screw rods are arranged; the extrusion box has a feed hopper, the feed hopper has a feed cavity, at least one vibration mechanism for vibrating the material is arranged on a side of the feed hopper away from the feed cavity, the vibration mechanism comprises a vibration disk arranged on the feed hopper and a generating component for driving the vibration disk.

[0007] Furthermore, the vibration plate includes a supporting plate body attached to the feed hopper, a plurality of ultrasonic vibrators are arranged in the supporting plate body, the plurality of ultrasonic vibrators are evenly distributed in the supporting plate body, and the plurality of ultrasonic vibrators are electrically connected to the generating assembly.

[0008] Furthermore, the generating assembly includes an ultrasonic generator and a transmission cable electrically connected to the ultrasonic generator, and the transmission cable is electrically connected to a plurality of the ultrasonic vibrators.

[0009] Furthermore, the driving mechanism includes a driving motor, a reduction gearbox connected to the driving motor, and a connecting shaft tube connected to the reduction gearbox, and the connecting shaft tube is detachable at one end of the spiral rod in the length direction.

[0010] Furthermore, a slot is provided on one side of the connecting shaft tube, and a telescopic latch is provided on the corresponding end of the spiral rod, and the telescopic latch is engaged with or disengaged from the slot.

[0011] Furthermore, a fixed plate for pressing against the spiral rod is provided in the connecting shaft tube, and the fixed plate is slidably connected to the connecting shaft tube; a spring telescopic bolt is provided in the connecting shaft tube, one end of the spring telescopic bolt is connected to the fixed plate, and the other end of the spring telescopic bolt is connected to an end of the connecting shaft tube away from the spiral rod.

[0012] Furthermore, the telescopic latch has a sliding inclined surface that cooperates with the latch slot, and the sliding inclined surface abuts against or disengages from the latch slot.

[0013] The utility model has the following advantages:

[0014] 1. The utility model is a screw extruder for fiberizing electrode materials. The vibration disk drives the feed hopper to vibrate at high frequency. On the one hand, the high-frequency vibration can disperse and shake off the electrode materials bonded in the feed hopper to prevent the feed port at the bottom of the hopper from being blocked. Compared with the traditional stirring method, the mechanical vibration consumes less power, makes less noise, and has a stronger dispersion effect on the electrode material. On the other hand, the use of the vibration disk will not occupy the feed cavity space of the feed hopper, and the feeding speed can be guaranteed. In addition, the mechanical vibration effect can also cause the particles in the electrode material to vibrate, thereby providing additional shear force and extrusion force, which is beneficial to the fiberization of some materials such as polytetrafluoroethylene.

[0015] 2. The screw extruder of the utility model is provided with a slot on the connecting shaft tube and a telescopic bolt at one end corresponding to the screw rod. The connecting tube shaft and the screw rod can be installed and fixed by embedding the telescopic bolt in the slot. When disassembling, the screw rod is pushed in the direction of the connecting tube shaft so that the telescopic bolt moves through the sliding inclined surface until it is out of the slot. Then the screw rod is rotated to pull it in the direction away from the connecting shaft tube, and the screw rod can be directly pulled out of the extrusion box, thereby improving the efficiency of installation and disassembly of the screw rod and facilitating the cleaning of the screw rod and the inner cavity of the screw extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of a screw extruder used for fiberizing electrode materials in an embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the structure of the cooperation between the vibration mechanism and the extrusion mechanism in the embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the internal structure of the vibration plate in the embodiment of the present application;

[0020] Figure 4 This is a schematic diagram of the structure of the connection between the shaft tube and the spiral rod in the embodiment of the present application;

[0021] Figure 5 This is a schematic diagram of the assembly of the connecting shaft tube and the spiral rod in the embodiment of the present application;

[0022] Figure 6 Schematic diagram of the internal structure of the connecting shaft tube in the embodiment of the present application.

[0023] Description of reference numerals:

[0024] 1. Frame; 2. Extrusion mechanism; 21. Extrusion box; 22. Screw rod; 221. Telescopic bolt; 23. Feed hopper; 3. Driving mechanism; 31. Driving motor; 32. Reducer; 33. Connecting shaft tube; 331. Slot; 332. Fixed plate; 333. Spring telescopic bolt; 4. Vibration mechanism; 41. Vibration plate; 411. Support plate; 412. Ultrasonic vibrator; 42. Generating assembly; 421. Ultrasonic generator; 422. Transmission cable. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] Reference Figure 1 A screw extruder for fiberizing electrode materials comprises a frame 1, an extrusion mechanism 2 arranged on the frame 1, a driving mechanism 3 for driving the extrusion mechanism 2, and a vibration mechanism 4 for vibrating the extrusion mechanism 2. When the screw extruder is running, the material is fed from the feed port of the extrusion mechanism 2, the driving mechanism 3 drives the extrusion mechanism 2, the extrusion mechanism 2 shears and extrude the material, and the vibration mechanism 4 runs synchronously to prevent the feed port of the extrusion mechanism 2 from being blocked.

[0032] Specifically, the frame 1 is used to support the extrusion mechanism 2, the driving mechanism 3 and the vibration mechanism 4. The extrusion mechanism 2 includes an extrusion box 21, which is extended along the length direction of the frame 1. A plurality of screw rods 22 are arranged in the extrusion box 21, and the plurality of screw rods 22 can rotate in the extrusion box 21. In this embodiment, there are three screw rods 22, which are arranged in parallel with each other and connected to the driving mechanism 3, that is, the screw extruder is a three-screw extruder. The extrusion box 21 has a feed hopper 23, and the feed hopper 23 has a feed cavity connected to the feed port of the extrusion box 21. In order to vibrate the material, at least one vibration mechanism 4 is arranged on the side of the feed hopper 23 away from the feed cavity. In this embodiment, there is one vibration mechanism 4, and the vibration mechanism 4 is located in the middle of one side of the feed hopper 23.

[0033] Reference Figure 2 and Figure 3 The vibration mechanism 4 includes a vibration plate 41 disposed on the feed hopper 23 and a generating assembly 42 for driving the vibration plate 41. Specifically, the vibration plate 41 is attached to the feed hopper 23 and fixed, and the vibration plate 41 includes a support plate body 411 attached to the feed hopper 23, and a plurality of ultrasonic vibrators 412 are disposed in the support plate body 411, and the plurality of ultrasonic vibrators 412 are evenly distributed in the support plate body 411, and the plurality of ultrasonic vibrators 412 are electrically connected to the generating assembly 42. The generating assembly 42 includes an ultrasonic generator 421 and a transmission cable 422 electrically connected to the ultrasonic generator 421, and the transmission cable 422 is electrically connected to the plurality of ultrasonic vibrators 412, and the transmission cable 422 is a high-frequency transmission line.

[0034] The ultrasonic vibrator 412 is composed of a transducer and a variable amplitude rod. The transducer has piezoelectric ceramics. When the generating component 42 is running, the piezoelectric effect of the piezoelectric ceramics in the transducer realizes the mutual conversion of electrical energy and mechanical energy (sound wave vibration), and the vibration amplitude is amplified by the variable amplitude rod, thereby vibrating the material in the feed hopper 23.

[0035] Reference Figure 4 The driving mechanism 3 is used to drive the screw rod 22. The driving mechanism 3 is located at one end of the extrusion box 21 in the length direction. The driving mechanism 3 includes a driving motor 31, a reduction box 32 connected to the driving motor 31, and a connecting shaft tube 33 connected to the reduction box 32. The number of the connecting shaft tubes 33 corresponds to the number of the screw rods 22. One end of the connecting shaft tube 33 is connected to the reduction box 32, and the other end of the connecting shaft tube 33 can be detached from one end of the screw rod 22 in the length direction. The speed of rotation of the screw rod 22 can be conveniently controlled by the reduction box 32, so that the operation of the extruder is more stable.

[0036] Reference Figure 5 and Figure 6 At the same time, in order to facilitate the installation and removal of the spiral rod 22, a slot 331 is provided on one side of the connecting shaft tube 33 and the end of the spiral rod 22, and a telescopic bolt 221 is provided at the corresponding end of the spiral rod 22. A compression spring (not shown in the figure) is provided between the telescopic bolt 221 and the spiral rod 22 to pop out or retract, and the telescopic bolt 221 is engaged with or disengaged from the slot 331. The telescopic bolt 221 has a sliding inclined surface that cooperates with the slot 331, and the sliding inclined surface abuts against or disengages from the slot 331. A fixed disk 332 for abutting against the spiral rod 22 is also provided in the connecting shaft tube 33, and the fixed disk 332 is slidably connected to the connecting shaft tube 33; a spring telescopic bolt 333 is provided in the connecting shaft tube 33, and one end of the spring telescopic bolt 333 is connected to the fixed disk 332, and the other end of the spring telescopic bolt 333 is connected to the end of the connecting shaft tube 33 away from the spiral rod 22.

[0037] By setting the connecting shaft tube 33 in this way, when the screw rod 22 needs to be disassembled, the screw rod 22 is pushed in the direction of the connecting shaft tube 33, so that the telescopic clamping bolt 221 moves through the sliding inclined surface until it disengages from the clamping groove 331, and then the screw rod 22 is rotated to make the telescopic clamping bolt 221 misaligned with the clamping groove 331, and finally the screw rod 22 is pulled in the direction away from the connecting shaft tube 33, so that the screw rod 22 can be directly pulled out of the extrusion box body 21, thereby improving the efficiency of installation and disassembly of the screw rod 22 and facilitating the cleaning of the screw rod 22 and the inner cavity of the screw extruder.

[0038] When using a screw extruder, first put the electrode material into the feed hopper 23, use the generating assembly 42 to convert the electrical energy into a high-frequency AC signal, and then transmit it to the ultrasonic vibrator 412 on the inside of the vibration disk 41 through the transmission cable 422. The ultrasonic vibrator 412 converts the electrical energy into mechanical energy to generate acoustic vibrations, and then the vibration disk 41 drives the feed hopper 23 to vibrate at high frequency, disperse and shake off the electrode material in the feed hopper 23, and prevent the electrode material from agglomerating and clogging at the feed port. Compared with traditional stirring methods, ultrasonic vibration consumes less power, makes less noise, and has a stronger dispersion effect on electrode materials. At the same time, by providing a connecting shaft tube 33, the installation and disassembly efficiency of the screw rod 22 can be improved, thereby facilitating the cleaning of the inner cavity of the extrusion box 21.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A screw extruder for fiberizing electrode materials, comprising a frame (1), characterized in that: It also includes an extrusion mechanism (2) arranged on the frame (1) and a driving mechanism (3) for driving the extrusion mechanism (2); the extrusion mechanism (2) includes an extrusion box (21), and a plurality of screw rods (22) are arranged in the extrusion box (21); the extrusion box (21) has a feed hopper (23), and the feed hopper (23) has a feed cavity, and at least one vibration mechanism (4) for vibrating the material is arranged on the side of the feed hopper (23) away from the feed cavity, and the vibration mechanism (4) includes a vibration disk (41) arranged on the feed hopper (23) and a generating component (42) for driving the vibration disk (41).

2. The screw extruder for fiberizing electrode materials according to claim 1, characterized in that: The vibration plate (41) comprises a support plate body (411) attached to the feed hopper (23), a plurality of ultrasonic vibrators (412) are arranged in the support plate body (411), the plurality of ultrasonic vibrators (412) are evenly distributed in the support plate body (411), and the plurality of ultrasonic vibrators (412) are electrically connected to the generating assembly (42).

3. The screw extruder for fiberizing electrode materials according to claim 2, characterized in that: The generating assembly (42) comprises an ultrasonic generator (421) and a transmission cable (422) electrically connected to the ultrasonic generator (421), and the transmission cable (422) is electrically connected to a plurality of ultrasonic vibrators (412).

4. The screw extruder for fiberizing electrode materials according to any one of claims 1 to 3, characterized in that: The driving mechanism (3) comprises a driving motor (31), a reduction box (32) connected to the driving motor (31), and a connecting shaft tube (33) connected to the reduction box (32); the connecting shaft tube (33) is detachable from one end of the spiral rod (22) in the length direction.

5. The screw extruder for fiberizing electrode materials according to claim 4, characterized in that: A clamping groove (331) is provided on one side of the connecting shaft tube (33), and a telescopic clamping bolt (221) is provided on the corresponding end of the spiral rod (22), and the telescopic clamping bolt (221) is engaged with or disengaged from the clamping groove (331).

6. The screw extruder for fiberizing electrode materials according to claim 5, characterized in that: A fixing plate (332) for pressing against the spiral rod (22) is arranged in the connecting shaft tube (33), and the fixing plate (332) is slidably connected to the connecting shaft tube (33); a spring telescopic bolt (333) is arranged in the connecting shaft tube (33), one end of the spring telescopic bolt (333) is connected to the fixing plate (332), and the other end of the spring telescopic bolt (333) is connected to an end of the connecting shaft tube (33) away from the spiral rod (22).

7. The screw extruder for fiberizing electrode materials according to claim 5, characterized in that: The telescopic latch bolt (221) has a sliding inclined surface that matches the latch slot (331), and the sliding inclined surface abuts against or disengages from the latch slot (331).

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