Double-screw extruder

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a double-screw extruder which comprises a machine barrel, a screw rod and a screw rod, the two conical screw rods are matched and meshed with each other; one end of the conical screw penetrates into the accommodating cavity, and the other end of the conical screw extends out of the accommodating cavity; the end, extending out of the containing cavity, of the conical screw is detachably connected with an adjusting plate and used for being in driving connection with a driving piece through the adjusting plate. The conical double-screw extruder solves the problems that the position of an extrusion screw of an existing conical double-screw extruder is usually fixed in a machine barrel, adjustment is difficult during installation, universality is poor, and the extrusion screw is prone to being affected by machining errors and accumulated errors.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, specifically to a twin-screw extruder. Background Technology

[0002] Screws are increasingly widely used in the production of lithium battery positive and negative electrode slurries, serving as a crucial component for continuous mixing and dispersion. Conical twin-screw extruders offer advantages such as excellent plasticizing properties, strong extrusion capacity, wide adaptability, and superior equipment performance, making them particularly advantageous for extruding high-solids and ultra-high-solids slurries and dry powders.

[0003] Existing conical twin-screw extruders typically include a drive motor, a barrel, and two extrusion screws installed inside the barrel. The two extrusion screws mesh with each other and are driven by the drive motor to output material. The position of the extrusion screws inside the barrel is usually fixed, making it difficult to adjust during installation. This results in poor versatility and susceptibility to processing errors and cumulative errors. Utility Model Content

[0004] Therefore, this utility model provides a twin-screw extruder that solves the problem that the position of the extrusion screw in the barrel of the existing conical twin-screw extruder is usually fixed, making it difficult to adjust during installation, resulting in poor versatility and susceptibility to processing errors and cumulative errors.

[0005] In view of this, the present invention provides a twin-screw extruder, comprising:

[0006] The barrel has a receiving cavity;

[0007] Two tapered screws are fitted and meshed with each other; one end of the tapered screw passes through the receiving cavity, and the other end extends out of the receiving cavity; the end of the tapered screw extending out of the receiving cavity is detachably connected to an adjusting plate, which is used to drive the connection with the driving component through the adjusting plate.

[0008] In one alternative embodiment, the adjusting plate is coaxially connected to the tapered screw by screws.

[0009] In one optional embodiment, the tapered screw includes a mandrel, a threaded element, and a locking member. The locking member is detachably connected to the end of the mandrel away from the adjusting plate. A limiting flange is provided on the mandrel corresponding to the threaded element. The threaded element is sleeved on the mandrel. One end of the threaded element abuts against the limiting flange, and the other end abuts against the locking member.

[0010] In one optional embodiment, the mandrel is provided with a plurality of splines, the plurality of splines are spaced apart around the axial direction of the mandrel, the splines are arranged along the axial direction of the mandrel, and the threaded element is provided with a keyway corresponding to the splines.

[0011] In one alternative embodiment, the diameter of the mandrel gradually decreases along the material conveying direction, and the size of the spline gradually decreases along the material conveying direction.

[0012] In one alternative embodiment, the locking element is a locking shaft head, which is threadedly connected to the spindle.

[0013] In one alternative implementation, the locking shaft head is tapered.

[0014] In one optional embodiment, the end of the conical screw extending into the receiving cavity includes a feeding section, a compression section, a mixing section, and a metering section, wherein the feeding section, the compression section, the mixing section, and the metering section are arranged sequentially along the material conveying direction.

[0015] In one optional embodiment, a mixing block is provided on the conical screw corresponding to the mixing section, and the mixing blocks on the two conical screws mesh with each other.

[0016] In one alternative implementation, the mortise block is a single-ribbed helix.

[0017] The technical solution of this utility model has the following advantages:

[0018] In this invention, the conical screw is connected to the driving component by an adjusting plate, which allows for adjustment of the gap between the conical screw and the inner wall of the receiving cavity, or adjustment of the radial and lateral gaps of the conical screw, by replacing the adjusting plate with one of different thicknesses. The thickness of the adjusting plate can be selected according to actual needs to meet the fitting requirements, improve the versatility of the conical screw, and reduce the impact of machining errors and cumulative errors. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a structural cross-sectional view of the twin-screw extruder provided by this utility model;

[0021] Figure 2 A schematic diagram of the structure of two tapered screws cooperating with each other, provided by this utility model;

[0022] Figure 3 A schematic diagram of the mandrel provided by this utility model;

[0023] Figure 4 A schematic diagram of the structure of the threaded element provided by this utility model;

[0024] Figure 5 A schematic diagram of the structure of the mortar block is provided for this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Barrel; 2. Adjusting plate; 3. Mandrel; 4. Threaded element; 5. Locking element; 6. Limiting flange; 7. Spline; 8. Feeding section; 9. Compression section; 10. Mixing section; 11. Metering section; 12. Mixed block. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0032] According to an embodiment of the present invention, a twin-screw extruder is provided, comprising: a barrel 1 having a receiving cavity; two conical screws adapted to and meshing with each other; one end of the conical screw passing through the receiving cavity and the other end extending out of the receiving cavity; an adjusting plate 2 is detachably connected to the end of the conical screw extending out of the receiving cavity, for driving connection with a driving component through the adjusting plate 2.

[0033] It should be noted that the size of the receiving cavity is adapted to the overall size when the two tapered screws are engaged.

[0034] In this embodiment, an adjusting plate 2 is provided at the end of the tapered screw. The adjusting plate 2 is connected to the driving component, which facilitates the adjustment of the gap between the tapered screw and the inner wall of the receiving cavity, or the adjustment of the radial and lateral gaps of the tapered screw, by replacing the adjusting plate 2 with one of different thicknesses. For example, when the gap between the tapered screw and the inner wall of the receiving cavity is too large, a thicker adjusting plate 2 can be replaced. When the gap between the tapered screw and the inner wall of the receiving cavity is too large, a thinner adjusting plate 2 can be replaced. The thickness of the adjusting plate 2 can be selected according to actual needs to meet the fitting requirements, improve the versatility of the tapered screw, and reduce the impact of machining errors and cumulative errors.

[0035] In one embodiment, such as Figure 1 As shown, the adjusting plate 2 is coaxially connected to the tapered screw via screws.

[0036] In this embodiment, the adjusting plate 2 is coaxially connected to the tapered screw with screws, which facilitates installation and disassembly and improves the convenience of adjustment.

[0037] In one embodiment, such as Figures 1 to 4 As shown, the tapered screw includes a spindle 3, a threaded element 4, and a locking element 5. The locking element 5 is detachably connected to the end of the spindle 3 away from the adjusting plate 2. The spindle 3 is provided with a limiting flange 6 corresponding to the threaded element 4. The threaded element 4 is sleeved on the spindle 3. One end of the threaded element 4 abuts against the limiting flange 6, and the other end abuts against the locking element 5.

[0038] It should be noted that the threaded element 4 is located inside the receiving cavity to facilitate the conveying of materials.

[0039] In this embodiment, the threaded element 4 is sleeved on the mandrel 3 and is axially limited by the limiting flange 6 and the locking member 5, which facilitates installation and disassembly, so as to replace different threaded elements 4 as needed.

[0040] Specifically, such as Figure 2 As shown, the threaded elements 4 on the two tapered screws have opposite directions of rotation.

[0041] Specifically, the adjusting plate 2 is coaxially connected to the spindle 3.

[0042] In one embodiment, such as Figure 3 As shown, the mandrel 3 is provided with multiple splines 7, which are spaced apart around the axial direction of the mandrel 3. The splines 7 are arranged along the axial direction of the mandrel 3, and the threaded element 4 is provided with a keyway corresponding to the splines 7.

[0043] In this embodiment, the threaded element 4 is engaged with the spline 7 on the mandrel 3 via a keyway. During installation, the threaded element 4 is fitted onto the mandrel 3 and the torque is transmitted through the spline 7 to achieve rotation together to transport materials, which facilitates installation and replacement.

[0044] In one embodiment, such as Figure 1 and Figure 3 As shown, the diameter of the mandrel 3 gradually decreases along the material conveying direction, and the size of the spline 7 also gradually decreases along the material conveying direction.

[0045] In this embodiment, the diameter of the mandrel 3 gradually decreases along the material conveying direction, i.e., it is tapered and adapted to the overall shape of the tapered screw. The dimensions of the spline 7 (e.g., the circumferential curvature and the height protruding along the material conveying direction) gradually decrease to adapt to the change in the diameter of the mandrel 3, so as to ensure that the mandrel 3 has sufficient torque to drive the threaded element 4 to rotate and meet the strength requirements.

[0046] In one embodiment, such as Figure 1 As shown, the locking component 5 is a locking shaft head, which is threadedly connected to the spindle 3.

[0047] It should be noted that the locking shaft head is coaxially connected to the spindle 3.

[0048] In this embodiment, the locking shaft head is threadedly connected to the spindle 3, which facilitates installation and disassembly, and makes it easy to replace the threaded element 4.

[0049] In one embodiment, such as Figure 1 and Figure 2 As shown, the locking shaft head is tapered.

[0050] In this embodiment, the locking shaft head is tapered, which can reduce material accumulation and make material extrusion smoother.

[0051] In one embodiment, such as Figure 2 As shown, the end of the conical screw that extends into the receiving cavity includes a feeding section 8, a compression section 9, a mixing section 10, and a metering section 11, which are arranged sequentially along the material conveying direction.

[0052] In this embodiment, the conical screw is provided with a feeding section 8, a compression section 9, a mixing section 10, and a metering section 11. The feeding section is used to drive the material inward, the compression section 9 is used to plasticize the material, the mixing section 10 is used to mix the material, and the metering section 11 is used to drive the material out while ensuring that the output of the material is uniform and consistent, thus having a metering effect. By setting the conical screw into sections, each section can be replaced with threaded elements 4 with different leads, different inner and outer cone angles, different screw edge thicknesses, different screw groove depths, and different screw edge types according to the different process requirements of different materials, making it suitable for processing a variety of materials and highly versatile.

[0053] Specifically, threaded element 4 includes a feeding section thread, a compression section thread, a mixing section thread, and a metering section thread. Different thread types are set according to the different process requirements of different materials.

[0054] Specifically, the mandrel 3 is arranged in a stepped manner corresponding to the feeding section 8, compression section 9, mixing section 10 and metering section 11. The spline 7 includes a first spline, a second spline, a third spline and a fourth spline, and the first spline, the second spline, the third spline and the fourth spline are respectively arranged to correspond to the feeding section 8, the compression section 9, the mixing section 10 and the metering section 11. The segmented arrangement ensures sufficient torque.

[0055] In one embodiment, such as Figure 2 and Figure 5 As shown, a mixing block 12 is provided on the conical screw corresponding to the mixing section 10, and the mixing blocks 12 on the two conical screws mesh with each other.

[0056] In this embodiment, by setting the mixing blocks 12, the mixing blocks 12 on the conical screw cooperate with each other to repeatedly knead the material, thereby improving the mixing effect of the fibrous powder and significantly improving the film-forming tensile strength of the powder.

[0057] In one embodiment, the mortise block 12 is a single spiral ridge.

[0058] It should be noted that the mixing blocks 12 on the two conical screws rotate in opposite directions.

[0059] In this embodiment, the mixing block 12 adopts a single spiral edge, and the mixing blocks 12 on the two conical screws cooperate with each other to further improve the mixing effect.

[0060] Specifically, the driving component includes a drive motor and a geared motor, with the drive motor connected to the tapered screw via the geared motor.

[0061] The specific installation and working principle of the twin-screw extruder provided in this embodiment are as follows: Different threaded elements 4, namely the corresponding feeding section thread, compression section thread, mixing section thread, and metering section thread, can be installed according to the different process requirements of different materials. These threads are fitted onto the mandrel 3 through a keyway and spline 7 on the mandrel 3. The mandrel 3 is locked and limited by the limiting flange 6 on the mandrel 3 and the locking shaft head. At the same time, the feeding section thread, compression section thread, mixing section thread, and metering section thread extend into the receiving cavity of the barrel 1, so that the feeding section 8 and compression section 9 on the two tapered screws... The mixing section 10 and metering section 11 are meshed together. The mandrel 3 is driven by the drive unit through the adjusting plate 2. The clearance is adjusted to an appropriate level by changing the adjusting plate 2 of different thicknesses, based on the gap between the conical screw and the inner wall of the receiving cavity, the radial clearance of the conical screw, and the side clearance. The drive unit then drives the two conical screws to rotate, realizing material conveying. During conveying, the material is conveyed through the feeding section 8, plasticized through the compression section 9, internally mixed through the mixing block 12 in the mixing section 10, and metered and output through the metering section 11. The twin-screw extruder provided in this embodiment reduces material accumulation through the conical locking shaft head, making material extrusion smoother; the mixing block 12 improves the internal mixing effect of the powder, significantly enhancing the film-forming tensile strength of the powder; and the clearance of the conical screws can be adjusted by changing the adjusting plate 2 of different thicknesses, improving the versatility of the screws while reducing the impact of processing errors and cumulative errors. This invention solves the problem that the position of the extrusion screw in the barrel 1 of the existing conical twin-screw extruder is usually fixed, making it difficult to adjust during installation, resulting in poor versatility and susceptibility to processing errors and cumulative errors.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A twin-screw extruder, characterized by, The utility model relates to a kind of screw extruder, including: Machine barrel (1) with containing cavity; Two taper screws, mutually adaptive engagement;One end of the taper screw is arranged in the containing cavity, and the other end extends out of the containing cavity;The end of the taper screw extending out of the containing cavity is detachably connected with adjusting plate (2), for driving connection by the adjusting plate (2) and driving member.

2. Twin screw extruder according to claim 1, characterized in that The adjusting plate (2) is coaxially connected with the taper screw by screw.

3. The twin screw extruder of claim 1, wherein, The taper screw includes mandrel (3), threaded element (4) and locking piece (5), the locking piece (5) is detachably connected with the end of the mandrel (3) away from the adjusting plate (2), the mandrel (3) is provided with limit flange (6) corresponding to the threaded element (4), and the threaded element (4) is sleeved on the mandrel (3);One end of the threaded element (4) abuts against the limit flange (6), and the other end abuts against the locking piece (5).

4. Twin screw extruder according to claim 3, characterized in that A plurality of splines (7) are provided on the mandrel (3), and a plurality of the splines (7) are arranged at intervals around the axial direction of the mandrel (3), the spline (7) is arranged along the axial direction of the mandrel (3), and the threaded element (4) is provided with keyway corresponding to the spline (7).

5. Twin-screw extruder according to claim 4, characterized in that The diameter of the mandrel (3) gradually decreases along the conveying direction of material, and the size of the spline (7) gradually decreases along the conveying direction of material.

6. The twin-screw extruder of claim 3, wherein The locking piece (5) is a locking shaft head, and the locking shaft head is threadedly connected with the mandrel (3).

7. Twin screw extruder according to claim 6, characterized in that The locking shaft head is conical.

8. Twin-screw extruder according to any one of claims 1 to 7, characterized in that The end of the taper screw extending into the containing cavity includes feeding section (8), compression section (9), mixing section (10) and metering section (11), and the feeding section (8), the compression section (9), the mixing section (10) and the metering section (11) are sequentially arranged along the conveying direction of material.

9. Twin screw extruder according to claim 8, characterized in that Corresponding to the mixing section (10) on the taper screw, a dense mixing block (12) is provided, and the dense mixing blocks (12) on the two taper screws are mutually engaged.

10. Twin screw extruder according to claim 9, characterized in that The dense mixing block (12) is a single spiral rib.

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