Mixing chamber with replaceable duckbill and conical tip and extrusion tablet press

Abstract

A mixing chamber with replaceable duckbills and conical tips and an extrusion tablet press relate to the technical field of twin-screw extrusion tablet presses, the mixing chamber comprises a mixing chamber body and a duckbilled assembly, the duckbilled assembly is detachably connected to the front end of the mixing chamber body, and the duckbilled assembly comprises a duckbilled body and conical tips detachably connected to two sides of the front end of the duckbilled body. An opening in the front end of the duckbilled body and the conical tips on the two sides form a discharge port with a coherent outline, and a sealing strip for being attached to the roller surface of an external tabletting roller for sealing is arranged on the edge of the discharge port. The structural limitation of a traditional integrated mixing chamber is broken through, the replacement cost of spare parts caused by local abrasion is remarkably reduced through the independent replaceable design of the duckbilled nozzle and the conical tip, and meanwhile the width of the discharging opening is flexibly adjusted so as to meet the multi-specification production requirement.

Description

Technical Field

[0001] This utility model relates to the technical field of twin-screw extrusion tablet presses, and in particular to a mixing chamber and extrusion tablet press with replaceable duckbill and cone tip. Background Technology

[0002] In the production of rubber and plastic materials and lithium battery electrode materials, twin-screw extruders are key mixing and molding equipment. The mixing chamber, as its core component, is responsible for extruding the mixed materials into sheet form through pressure rollers. In traditional mixing chamber structures, such as... Figure 1 As shown, the duckbill component (used to control the discharge width) and the cone tip component (used to guide material flow) are typically fixed to the mixing chamber body using an integral casting or welding process, forming a non-removable integral structure. This design has the following technical drawbacks in practical applications:

[0003] 1. Functional limitations: The width of the duckbill directly determines the size and specifications of the output sheet. Since the duckbill is fixed to the mixing chamber, the entire mixing chamber assembly must be replaced when the output sheet width needs to be adjusted. This not only leads to long equipment downtime but also limits the flexibility of the production line due to the high cost of spare parts.

[0004] 2. Sealing failure and maintenance difficulties: In existing technologies, the gap between the duckbill and the tableting roller lacks an effective sealing structure, making it easy for material to leak from the gap and affecting the quality of the tablets. Even though some solutions attempt to add a sealing strip, the integrated duckbill structure requires disassembling the entire mixing chamber to replace the sealing strip, which is complex and has extremely high maintenance costs.

[0005] 3. Component wear and resource waste: The duckbill and cone tip are prone to wear under long-term high pressure and high temperature conditions. In traditional designs, the entire mixing chamber needs to be replaced due to localized wear, resulting in material waste and increased equipment operating costs. Utility Model Content

[0006] One of the purposes of this invention is to provide a mixing chamber with replaceable duckbill and cone tip to solve the problems of difficult sealing and maintenance and high cost of component replacement.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a mixing chamber with replaceable duckbill and cone tip, comprising a mixing chamber body and a duckbill assembly, wherein the duckbill assembly is detachably connected to the front end of the mixing chamber body, the duckbill assembly includes a duckbill body and cone tips detachably connected to both sides of the front end of the duckbill body, the opening at the front end of the duckbill body and the cone tips on both sides form a discharge port with a continuous profile, and the edge of the discharge port is provided with a sealing strip for sealing against the roller surface of the external pressing roller.

[0008] Preferably, each of the two sides of the front end of the duckbill body is detachably connected to an insert, the insert being provided with a dovetail groove, the rear end face of the cone tip being provided with a protrusion that mates with the dovetail groove, and a side cover plate being detachably installed on the side end of the duckbill body, the side cover plate being detachably connected to the side end of the cone tip by bolts.

[0009] More preferably, the front end of the duckbill body is provided with mounting grooves on both sides for the corresponding inserts to be fully embedded, and the outer wall of the mounting groove is provided with a notch that matches the dovetail groove, and the notch can be blocked by the side cover plate.

[0010] More preferably, the front end face of the mixing chamber body is provided with a groove for cooperating with the duckbill body, and the duckbill body is detachably connected to the bottom surface of the groove by bolts.

[0011] The sealing strip includes a main sealing strip fixed to the front opening of the duckbill body and a secondary sealing strip fixed to the inner contour of the cone tip.

[0012] In addition, this utility model also provides an extrusion tablet press, which is provided with the above-mentioned interchangeable duckbill and cone tip mixing chamber. The front side of the interchangeable duckbill and cone tip mixing chamber is provided with a roller mechanism that can move back and forth. The roller mechanism can be moved forward to expose the mixing chamber, so as to facilitate the replacement of the cone tip and sealing strip.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By detachably connecting the duckbill assembly to the mixing chamber body and allowing independent disassembly and assembly of the cone tip, a modular design for key components of the mixing chamber is achieved. When the duckbill or cone tip experiences localized wear, only the corresponding component needs to be replaced, eliminating the need to replace the entire mixing chamber. This significantly reduces material waste and spare parts costs, and cone tip replacement is highly efficient, requiring no lifting tools. The detachable cone tip design allows for quick replacement with cone tips of different sizes or shapes, thereby adjusting the outlet width and shape to meet the production needs of various sheet specifications, avoiding the sheet width limitation problem caused by the fixed outlet in traditional integrated mixing chambers. Furthermore, a sealing strip is installed at the edge of the outlet. Through its tight fit with the external pressing roller surface, it effectively seals the gap between the duckbill assembly and the roller surface, preventing material leakage under high-pressure conditions and ensuring stable sheet quality. Attached Figure Description

[0015] Figure 1 Schematic diagram of the existing mixing chamber and duckbill structure.

[0016] Figure 2 This is a schematic diagram of the overall structure of the duckbill assembly in the embodiment;

[0017] Figure 3 This is a schematic diagram of the mixing chamber structure in the embodiment;

[0018] Figure 4 This is a schematic diagram of the extrusion tablet press in the embodiment when the roller mechanism is moving.

[0019] In the picture:

[0020] 1 - Mixing Chamber Main Body 2 - Duckbill Main Body 3 - Cone Tip

[0021] 4 – Sealing strip; 5 – Inlay; 6 – Dovetail groove

[0022] 7 - Protrusion; 8 - Side cover plate. Detailed Implementation

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0024] It should be noted in advance that, in this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "on" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them.

[0025] like Figures 1 to 3 As shown, a mixing chamber with replaceable duckbill and cone tip includes a mixing chamber body 1 and a duckbill assembly. The duckbill assembly is detachably connected to the front end of the mixing chamber body 1. The duckbill assembly includes a duckbill body 2 and cone tips 3 detachably connected to both sides of the front end of the duckbill body 2. The opening at the front end of the duckbill body 2 and the cone tips 3 on both sides form a discharge port with a continuous outline. The edge of the discharge port is provided with a sealing strip 4 for sealing with the roller surface of the external pressing roller.

[0026] In the above structure, a block 5 is detachably connected to each side of the front end of the duckbill body 2. The block 5 is provided with a dovetail groove 6. The rear end face of the cone tip 3 is provided with a protrusion 7 that mates with the dovetail groove 6. A side cover plate 8 is detachably installed on the side end of the duckbill body 2. The side cover plate 8 is detachably connected to the side end of the cone tip 3 by bolts. Furthermore, the front end of the duckbill body 2 has mounting grooves on both sides for the corresponding block 5 to be fully embedded. The outer wall of the mounting groove is provided with a notch that matches the dovetail groove 6. The notch can be blocked by the side cover plate 8. The cone tip 3 mates with the dovetail groove 6 of the block 5 through the protrusion 7. This allows the cone tip 3 to be moved directly out along the direction of the dovetail groove 6 and the notch after the side cover plate 8 and the sealing strip 4 are removed, achieving the effect of quick removal of the cone tip 3 and greatly facilitating subsequent maintenance. In this embodiment, the dovetail groove 6 is set in a horizontal direction so that the cone tip 3 can be pushed out laterally. Of course, if the vertical space allows, the dovetail groove can also be made in a vertical direction so that the cone tip can be taken out and replaced from the top and bottom.

[0027] In this embodiment, the front end face of the mixing chamber body 1 is provided with a groove for cooperating with the duckbill body 2. The duckbill body 2 is detachably connected to the bottom surface of the groove by bolts, which facilitates the disassembly and assembly of the entire duckbill body 2.

[0028] Furthermore, the sealing strip 4 includes a main sealing strip fixed to the front opening of the duckbill body 2 and a secondary sealing strip fixed to the inner contour of the cone tip 3. This way, when only the secondary sealing strip on the cone tip 3 is worn, only the secondary sealing strip on that cone tip 3 needs to be replaced, instead of replacing the entire sealing strip 4, greatly reducing maintenance costs and improving maintenance efficiency.

[0029] The interchangeable duckbill and cone tip mixing chamber provided in the above embodiment can be applied to an extrusion tablet press. It requires that the roller mechanism at the front end of the extrusion tablet press be configured as a movable structure. Those skilled in the art can install guide rails on the equipment as needed and slide the roller mechanism onto the guide rails. After adjusting the position, stability is ensured by locking with bolts. There is no technical difficulty in achieving the translation of the roller mechanism. Therefore, after setting a movable roller mechanism, it can be moved forward, such as... Figure 4 As shown, the mixing chamber can be exposed, at which point the sealing strip 4 can be replaced. Alternatively, after removing the sealing strip 4, the cone tip 3 can be quickly pushed outward by removing the side cover plate 8, thus achieving the purpose of quickly disassembling the cone tip 3. Then, the wear problem can be solved by replacing the cone tip 3, or the specifications of the cone tip 3 can be changed to meet the need to adjust the sheet width.

[0030] This utility model reconstructs the mixing chamber structure through a modular and detachable design, separating the traditional integrated duckbill from the mixing chamber into independent components. The duckbill body 2 is detachably connected to the groove at the front end of the mixing chamber body 1 via bolts, while the cone tip 3 is guided and positioned by the dovetail groove 6-protrusion 7 and locked with bolts on the side cover plate 8, enabling quick assembly and disassembly. Combined with the movable design of the extrusion tablet press's roller mechanism, maintenance or adjustment only requires moving the roller mechanism to expose the mixing chamber, allowing direct replacement of the sealing strip 4 or disassembly of the cone tip 3, without the need for hoisting equipment or complete disassembly of the mixing chamber, thus achieving highly efficient maintenance.

[0031] This solution breaks through the structural limitations of traditional integrated mixing chambers. Through the independent replaceable design of the duckbill and cone tip, it significantly reduces the cost of spare parts replacement due to local wear. At the same time, it supports flexible adjustment of the discharge port width to adapt to the production needs of multiple specifications. The convenient replacement of the sealing strip and the dual fixing mechanism of dovetail groove and side cover plate ensure the reliability of the seal and avoid component displacement caused by high-frequency vibration. The movable roller mechanism further simplifies the maintenance process, transforming the complex operation that requires stopping the machine for hoisting into quick in-situ disassembly and assembly, which greatly improves the utilization rate and production efficiency of the equipment. It is suitable for continuous production scenarios such as rubber and plastics, lithium battery materials, etc.

[0032] To facilitate understanding by those skilled in the art of the improvements of this utility model compared to the prior art, some of the accompanying drawings and descriptions of this utility model have been simplified. The above embodiments are preferred implementations of this utility model. In addition, this utility model can be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A mixing chamber with replaceable duckbill and cone tip, comprising a mixing chamber body (1) and a duckbill assembly, characterized in that: The duckbill assembly is detachably connected to the front end of the mixing chamber body (1). The duckbill assembly includes a duckbill body (2) and cone tips (3) detachably connected to both sides of the front end of the duckbill body (2). The opening at the front end of the duckbill body (2) and the cone tips (3) on both sides form a discharge port with a continuous profile. The edge of the discharge port is provided with a sealing strip (4) for sealing with the roller surface of the external pressing roller.

2. The mixing chamber with replaceable duckbill and cone tip according to claim 1, characterized in that: The front end of the duckbill body (2) is detachably connected to a block (5) on each side. The block (5) is provided with a dovetail groove (6). The rear end face of the cone tip (3) is provided with a protrusion (7) that cooperates with the dovetail groove (6). The side end of the duckbill body (2) is detachably installed with a side cover plate (8). The side cover plate (8) is detachably connected to the side end of the cone tip (3) by bolts.

3. The mixing chamber with replaceable duckbill and cone tip according to claim 2, characterized in that: The front sides of the duckbill body (2) are provided with mounting grooves for the corresponding inserts (5) to be fully embedded. The outer side wall of the mounting groove is provided with a notch that matches the dovetail groove (6). The notch can be blocked by the side cover plate (8).

4. The mixing chamber with replaceable duckbill and cone tip according to claim 1, characterized in that: The front end face of the mixing chamber body (1) is provided with a groove for cooperating with the duckbill body (2), and the duckbill body (2) is detachably connected to the bottom surface of the groove by bolts.

5. The mixing chamber with replaceable duckbill and cone tip according to claim 1, characterized in that: The sealing strip (4) includes a main sealing strip fixed to the front opening of the duckbill body (2) and a secondary sealing strip fixed to the inner contour of the cone tip (3).

6. An extrusion tablet press, characterized in that: The mixing chamber is provided with a replaceable duckbill and cone tip as described in any one of claims 1-5. The front side of the mixing chamber is provided with a roller mechanism that can move back and forth. The roller mechanism can be moved forward to expose the mixing chamber so as to facilitate the replacement of the cone tip (3) and the sealing strip (4).

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