A lateral devolatilization vacuum device

Abstract

The application discloses a kind of lateral devolatilization vacuum devices, it is related to lateral devolatilization equipment technical field, including lateral vacuum chamber, lateral exhaust insert, extruder barrel and screw element, lateral exhaust insert is connected lateral vacuum chamber by connecting fastener;Extruder barrel is connected with lateral exhaust insert by connecting fastener, and extruder barrel side has vacuum devolatilization mouth;Screw element is worn extruder barrel.The application provides a kind of lateral devolatilization vacuum device, effectively solves the technical problem that low polymer reflux pollution melt is caused by top vacuum in prior art, product quality is influenced, equipment volume is too large, cost is increased, and maintenance difficulty is increased simultaneously.

Description

Technical Field

[0001] This application relates to the field of lateral devouring equipment technology, and in particular to a lateral devouring vacuum device. Background Technology

[0002] Currently, the commonly used devolatilization methods in polymer extrusion production include top vacuum. Although top vacuum devices are simple to operate, they often cause melt contamination due to oligomer backflow, affecting product quality. Side vacuum ejectors achieve devolatilization through complex support structures, drive systems, and ejector screws, but these complex designs increase equipment size, raise costs, and increase maintenance difficulty. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a lateral devolatilization vacuum device to solve the technical problem in the prior art that top vacuuming easily causes oligomer backflow and contaminates the melt, affecting product quality.

[0004] In view of this, to achieve the above objectives, this application provides a lateral devolatilization vacuum device, including a lateral vacuum chamber, a lateral venting insert, an extruder barrel, and a screw element. The lateral venting insert is connected to the lateral vacuum chamber via connecting fasteners, and the opening of the lateral venting insert is flared and positioned high. The extruder barrel is connected to the lateral venting insert via connecting fasteners, and the side of the extruder barrel has a vacuum devolatilization port. The screw element passes through the extruder barrel, and the horizontal centerline of the screw element is lower than the opening position of the lateral venting insert.

[0005] Based on the above embodiments, the lateral vacuum chamber further includes a vacuum chamber door and a pin, wherein the vacuum chamber door is connected to one side of the lateral vacuum chamber via the pin.

[0006] Based on the above embodiments, the lateral vacuum chamber further includes a quick-release hinge, and the vacuum chamber door is fixed to the other side of the lateral vacuum chamber by the quick-release hinge.

[0007] Based on the above embodiments, two sealing gaskets are also included, one of which is located between the lateral vacuum chamber and the lateral exhaust insert, and the other of which is located between the lateral exhaust insert and the extruder barrel.

[0008] Based on the above embodiments, the lateral vacuum chamber further includes two vacuum ports, which are located on both sides of the lateral vacuum chamber.

[0009] Based on the above embodiments, the lateral vacuum chamber further includes a flange-type instrument interface, which is located above the lateral vacuum chamber.

[0010] Based on the above embodiments, the lateral vacuum chamber further includes a sealing O-ring, which is located between the lateral vacuum chamber and the vacuum chamber door and serves as a seal.

[0011] Based on the above embodiments, the entire cavity of the lateral vacuum chamber is funnel-shaped in the vertical direction, with the upper part of the cavity being horizontal and the lower part of the cavity forming a certain angle with the horizontal direction.

[0012] Compared with existing technologies, this application has beneficial effects. This application can effectively avoid the adverse effects of oligomer backflow on material quality by performing vacuum suction from the side and the high position of the side exhaust plug opening. In addition, the funnel-shaped design of the side vacuum chamber and the structure of the vacuum chamber door improve the cleaning efficiency of oligomers or residues. The structure is simple and easy to maintain. Compared with traditional vacuum top feeders, it saves complex components such as support frames, drive systems and screws, reducing equipment costs and space occupation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the specific embodiments of this application or 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 application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a lateral devouring vacuum device according to an embodiment of this application.

[0015] Figure 2 This is a cross-sectional view of an embodiment of this application.

[0016] Figure 3 This is a side view of an embodiment of this application.

[0017] Figure Labels

[0018] Device 100, side vacuum chamber 10, vacuum chamber door 11, pin 12, quick-release hinge 13, vacuum port 14, flange-type instrument interface 15, side exhaust plug 20, extruder barrel 30, screw element 31, sealing gasket 40, sealing O-ring 50, connecting fastener 60, threaded ejection hole 70. Detailed Implementation

[0019] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0020] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0021] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] like Figure 1 A lateral vacuum device 100 includes a lateral vacuum chamber 10, a lateral exhaust insert 20, an extruder barrel 30, and a screw element 31. The lateral exhaust insert 20 is connected to the lateral vacuum chamber 10 via a connecting fastener 60. The opening of the lateral exhaust insert 20 is funnel-shaped and positioned relatively high. The extruder barrel 30 is connected to the lateral exhaust insert 20 via the connecting fastener 60. The side of the extruder barrel 30 has a vacuum exhaust port. The screw element 31 passes through the extruder barrel 30, and the horizontal centerline of the screw element 31 is lower than the opening position of the lateral exhaust insert 20.

[0025] Specifically, the entire cavity of the lateral vacuum chamber 10 is funnel-shaped in the vertical direction, with the upper part of the cavity horizontal and the lower part forming a certain angle with the horizontal direction. The overall funnel shape of the lateral vacuum chamber 10 gradually widens in the vertical direction, while the lower part of the cavity is inclined at a certain angle. This design provides more convenient operating conditions when cleaning materials and oligomers that have solidified or adhered to the inner wall of the cavity, allowing the scraper to form a force angle, thereby reducing the cleaning burden on the operator, providing favorable physical conditions for the cleaning process, and improving the practicality and ease of operation of the equipment.

[0026] Furthermore, the lateral vacuum chamber 10 also includes a vacuum chamber door 11 and a pin 12. The vacuum chamber door 11 is connected to one side of the lateral vacuum chamber 10 via the pin 12, and the vacuum chamber door 11 is fixed to the other side of the lateral vacuum chamber 10 via a quick-release hinge 13. The connection between the vacuum chamber door 11 and the pin 12 allows for convenient opening and closing operations, while the quick-release hinge 13 ensures the stability of the vacuum chamber door 11 and its quick assembly and disassembly.

[0027] Specifically, the vacuum chamber door 11 is the main component used to seal the vacuum chamber and allow it to be opened for internal cleaning when needed; the pin 12 serves to fix the position of the vacuum chamber door 11 and provide support when opened. By loosening the quick-release hinge 13, the vacuum chamber door 11 rotates around the pin 12 to open, similar to the way a normal door opens. This not only facilitates the cleaning of materials such as cleaning fluid that emerge from the side of the vacuum chamber 10, but also makes it convenient to clean condensed oligomers during maintenance.

[0028] Furthermore, the lateral vacuum devolatilization device 100 also includes two sealing gaskets 40. One sealing gasket 40 is located between the lateral vacuum chamber 10 and the lateral exhaust insert 20, and the other sealing gasket 40 is located between the lateral exhaust insert 20 and the extruder barrel 30. Specifically, the sealing gasket 40 located between the lateral vacuum chamber 10 and the lateral exhaust insert 20 ensures that the environment inside the lateral vacuum chamber 10 is not disturbed and prevents external air from seeping in; while the sealing gasket 40 located between the lateral exhaust insert 20 and the extruder barrel 30 can maintain stable pressure inside the extruder.

[0029] Furthermore, the side vacuum chamber 10 also includes two vacuum ports 14 located on both sides of the side vacuum chamber 10, facilitating connection with the vacuum pump system and preventing space constraints when two vacuum units are installed on one extruder. When an extruder is equipped with two vacuum units, the two vacuum ports can perform vacuuming operations independently, effectively avoiding space constraints and improving work efficiency and flexibility.

[0030] Furthermore, the side vacuum chamber 10 also includes a flange-type instrument interface 15, which is located above the side vacuum chamber 10. The side vacuum chamber 10 provides a vacuum environment. The flange-type instrument interface 15 is designed to be located above the side vacuum chamber 10 to facilitate the connection of relevant instruments and equipment during industrial production, so as to monitor the vacuum level and other relevant parameters inside the side vacuum chamber 10 in real time, thereby ensuring the accuracy and reliability of the production process.

[0031] Furthermore, the side vacuum chamber 10 also includes a sealing O-ring 50, which is located between the side vacuum chamber 10 and the vacuum chamber door 11 to provide a seal and ensure that the environment inside the side vacuum chamber 10 is not contaminated by the outside air.

[0032] During use, this application achieves efficient devolatilization through the coordinated operation of the side vacuum chamber 10, the side exhaust insert 20, the extruder barrel 30, and the screw element 31. The side vacuum chamber 10 provides a vacuum environment and ensures stable internal pressure. Its vacuum chamber door 11 can be flexibly opened and closed via a pin 12 and a quick-release hinge 13, facilitating operation and maintenance. Sealing gaskets 40 ensure good sealing between the vacuum chamber door 11 and the side vacuum chamber 10, and between the side exhaust insert 20 and the extruder barrel 30, preventing gas leakage. Vacuum ports 14 and flange-type instrument interfaces 15 on both sides of the side vacuum chamber 10 are used to connect to external vacuum systems and instruments, ensuring the stability and monitoring of the vacuum environment. A sealing O-ring 50 is located between the vacuum chamber door 11 and the side vacuum chamber 10, further improving sealing performance. This application achieves an efficient devolatilization process, reduces the impact of volatile substances on product quality, and ensures operational safety and convenience.

[0033] During operation, the high-viscosity melt is propelled, melted, and homogenized by the rotational conveying and shearing action of the extruder screw element 31. The vacuum pump continuously evacuates through the vacuum ports 14 on both sides of the side vacuum chamber 10, establishing a stable environment within the entire side vacuum chamber 10. When the vacuum pump is first started, because the melt is not yet stably melted in the extruder, the vacuuming process will draw a small amount of melt into the side vacuum chamber 10. This small amount of melt accounts for less than 0.01% of the melt that has evaporated in the extruder screw element. For example, for every 100 kg of melt processed, less than 10 g of melt will enter the side vacuum chamber 10. After the vacuum environment stabilizes, because the opening of the side exhaust plug 20 is funnel-shaped and positioned high, no more melt will enter the side vacuum chamber 10.

[0034] Gas ejected from the molten material in the extruder screw element enters the side vacuum chamber 10 through the side exhaust insert 20. The flared design provides a smooth flow path, reduces airflow resistance, and prevents condensate blockage, allowing the gas to enter the side vacuum chamber 10 more smoothly and efficiently. The gas gathers in the cavity of the side vacuum chamber 10 and is eventually drawn out of the entire system by the vacuum pump through the vacuum port 14.

[0035] The sealing gasket 40 and sealing O-ring 50 ensure an absolute seal at the connection points of the side vacuum chamber 10, the side exhaust insert 20 and the extruder barrel 30, as well as the vacuum chamber door 11, preventing external air from leaking in and maintaining a stable high vacuum level within the system.

[0036] Specifically, such as Figure 2 The side exhaust insert 20 is also provided with a threaded ejection hole 70, which makes it easier to disassemble the side exhaust insert during maintenance.

[0037] Furthermore, the opening of the side venting insert 20 is positioned a certain distance above the horizontal centerline of the screw element 31. This design effectively prevents high-viscosity (>2000□Pa·s) melts from returning to the extruder barrel during operation. The overall enlarged and funnel-shaped opening gradually increases the flow space for condensate, allowing it to flow more smoothly into the side vacuum chamber 10, further reducing the risk of material overflow.

[0038] Specifically, such as Figure 3 The polymer flow direction is from left to right in the figure.

[0039] This application effectively avoids the adverse effects of oligomer backflow on material quality by performing vacuum suction from the side. This improvement eliminates the need for traditional side-mounted vacuum feeders, including their complex support frame, drive system, and barrel screw components. By avoiding these complex components, this application simplifies the equipment structure and reduces initial and maintenance costs.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lateral devouring vacuum device, characterized in that, include: Lateral vacuum chamber; A side exhaust insert is connected to the side vacuum chamber via fasteners. The opening of the side exhaust insert is funnel-shaped and positioned high. An extruder barrel, which is connected to the side venting insert via fasteners, has a vacuum degassing port on its side; A screw element that passes through the extruder barrel, wherein the horizontal centerline of the screw element is lower than the opening position of the lateral venting insert.

2. The lateral devolatilization vacuum device according to claim 1, characterized in that, The lateral vacuum chamber also includes a vacuum chamber door and a pin, wherein the vacuum chamber door is connected to one side of the lateral vacuum chamber by the pin.

3. The lateral devolatilization vacuum device according to claim 2, characterized in that, The lateral vacuum chamber also includes a quick-release hinge, and the vacuum chamber door is fixed to the other side of the lateral vacuum chamber by the quick-release hinge.

4. The lateral devolatilization vacuum device according to claim 3, characterized in that, It also includes two sealing gaskets, one of which is located between the lateral vacuum chamber and the lateral exhaust insert, and the other of which is located between the lateral exhaust insert and the extruder barrel.

5. The lateral devolatilization vacuum device according to claim 4, characterized in that, The lateral vacuum chamber also includes two vacuum ports, which are located on both sides of the lateral vacuum chamber.

6. The lateral devolatilization vacuum device according to claim 5, characterized in that, The lateral vacuum chamber also includes a flange-type instrument interface, which is located above the lateral vacuum chamber.

7. The lateral devolatilization vacuum device according to claim 6, characterized in that, The lateral vacuum chamber also includes a sealing O-ring, which is located between the lateral vacuum chamber and the vacuum chamber door to provide a seal.

8. The lateral devouring vacuum device according to claim 1, characterized in that, The entire cavity of the lateral vacuum chamber is funnel-shaped in the vertical direction, with the upper part of the cavity horizontal and the lower part forming a certain angle with the horizontal direction.

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