A screw extruder and a barrel connecting structure thereof

Abstract

The application provides a screw extruder and a barrel connecting structure thereof, and relates to the technical field of screw extruder structure. The barrel connecting structure comprises a barrel body, a part to be connected and an opening and closing mechanism. A first connecting flange on the barrel body is aligned with a second connecting flange on the part to be connected, and is clamped and fixed through the opening and closing mechanism, so that fixed connection between the two is realized, the connection reliability is ensured, and the problem of material leakage is improved. Meanwhile, the first half component and the second half component in the opening and closing mechanism are connected through a connecting screw, and the rotation directions of the first threaded section on the connecting screw which is screwed with the first half component and the second threaded section on the connecting screw which is connected with the second half component are opposite. Thus, when the connecting screw rotates, the first half component and the second half component can be driven to move in the opposite direction along the axial direction of the connecting screw, so that the connecting part is locked or loosened, and the opening and closing movement in the narrow space of the barrel connecting part is facilitated.

Description

Technical Field

[0001] This invention relates to the field of screw extruder structure technology, and more specifically, to a screw extruder and its barrel connection structure. Background Technology

[0002] In the plastic extrusion molding equipment system, the screw extruder occupies an irreplaceable core position. Its core value lies in its excellent versatility and highly modular design. As a core piece of equipment, the screw extruder can be flexibly matched and work collaboratively with a wide variety of downstream molding auxiliary equipment, such as sizing devices, traction machines, cutting machines, and winding machines. Through this efficient combination, a complete plastic extrusion production line can be built, realizing the continuous and large-scale production of various plastic products such as sheets, plates, pipes, films, rods, profiles, as well as granulation and cable coating. It is this wide applicability, high production capacity, and excellent control over complex processes that has established the screw extruder's cornerstone position in the plastics processing industry.

[0003] Existing screw extruders suffer from limited space between barrel connections, making manual assembly of the barrel and other equipment difficult under traditional flange designs. Disassembly of already connected components is also challenging. Bolt removal is cumbersome, hindering maintenance and replacement, and is extremely inconvenient in practical use. Furthermore, differences in preload among multiple bolts can lead to material leakage. Additionally, the tapered design of the barrel-die connection creates significant screw pressure within the extruder, which traditional flange connections, tightened manually, may struggle to withstand, resulting in material leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a screw extruder and its barrel connection structure, which can improve at least one of the technical problems existing in the prior art mentioned above.

[0005] Embodiments of the present invention can be implemented in the following ways:

[0006] A barrel connection structure for a screw extruder, the barrel connection structure of the screw extruder comprising:

[0007] The barrel body has a first connecting flange at each end;

[0008] A component to be connected having a second connecting flange for alignment with a first connecting flange; and an opening and closing mechanism for clamping and aligning the first and second connecting flanges to fix the barrel body to the component to be connected.

[0009] The opening and closing mechanism includes a first half-assembly, a second half-assembly, and a connecting screw. The first half-assembly and the second half-assembly are arranged opposite each other, and both ends of the first half-assembly and the second half-assembly are connected by the connecting screw, thereby forming a space between the first half-assembly and the second half-assembly to accommodate the first connecting flange and the second connecting flange. The connecting screw has a first threaded section and a second threaded section distributed along the axial direction. The first threaded section is screwed to the first half-assembly, and the second threaded section is screwed to the second half-assembly. The first threaded section and the second threaded section have opposite directions of rotation, so that when the connecting screw rotates, it drives the first half-assembly and the second half-assembly to move in opposite directions along the axial direction of the connecting screw, thereby locking or loosening the first connecting flange and the second connecting flange.

[0010] Optionally, the half assembly includes a half body having an arcuate segment and connecting portions located at both circumferential ends of the arcuate segment. The arcuate segment is used to form a space for accommodating the first connecting flange and the second connecting flange, and the arcuate segments of the first half assembly and the second half assembly are used to engage to form an annular structure; the connecting portions are used to connect with a connecting screw.

[0011] Optionally, a groove is provided on the concave surface of the arc segment, the groove extends circumferentially along the arc segment, and the groove is used to hold the first connecting flange and the second connecting flange, the bottom of the groove is used to fit against the outer peripheral surface of the first connecting flange and the outer peripheral surface of the second connecting flange.

[0012] Optionally, the arc-shaped segment has protruding edges on both sides of the groove, and the protruding edges are chamfered on the side facing the groove to guide the first connecting flange and the second connecting flange into the groove.

[0013] Optionally, the half assembly further includes a thread seat and a baffle. The connecting portion has a notch that extends through the connecting portion in a direction perpendicular to the connecting portion and has an opening on the side opposite to the arc segment. The thread seat is engaged in the notch and is used to screw onto the connecting screw. The opening allows the thread seat to enter and exit the notch, and the baffle is detachably installed at the opening to close it.

[0014] Optionally, the threaded seat is provided with a threaded hole for screwing into the connecting screw, and both ends of the threaded seat along the axial direction of the threaded hole have flanges. The flanges are used to hold the end faces of opposite sides of the connecting part to restrict the relative movement of the threaded seat and the half body along the axial direction of the threaded hole.

[0015] The wire seat, located in the middle between the two flanges, has a first plane and a second plane facing each other. The first plane and the second plane are used to engage with the side walls of the notch to restrict the rotation of the wire seat relative to the half body.

[0016] Optionally, one end of the screw hole is chamfered.

[0017] Optionally, the barrel connection structure of the screw extruder further includes a drive component, which is connected to the connecting screw to drive the connecting screw to rotate forward or in reverse.

[0018] Optionally, the connecting screw further includes a connecting section, which is connected to the driving member by a key.

[0019] A screw extruder includes a barrel connection structure as described above.

[0020] The beneficial effects of the screw extruder and its barrel connection structure provided by the embodiments of the present invention include:

[0021] The screw extruder barrel connection structure provided in the embodiments of the present invention achieves a fixed connection by setting a first connecting flange on the barrel body and a second connecting flange on other components that need to be connected to the barrel body. The first and second connecting flanges are aligned and clamped by an opening and closing mechanism, ensuring reliable connection and helping to improve the problem of easy material leakage. Simultaneously, the first and second half-assemblies in the opening and closing mechanism are connected by a connecting screw, and the first threaded section of the connecting screw that is screwed to the first half-assembly and the second threaded section that is screwed to the second half-assembly have opposite directions of rotation. Thus, when the connecting screw rotates, it can drive the first and second half-assemblies to move in opposite directions along the axial direction of the connecting screw, thereby locking or loosening the connection. This makes operation simpler and more convenient, and helps to complete the opening and closing movement within the confined space of the barrel connection.

[0022] Embodiments of the present invention also provide a screw extruder that includes the above-described screw extruder barrel connection structure. Therefore, it also has the advantages of ensuring the reliability of the barrel connection, providing a large locking force, avoiding material leakage caused by excessive screw pressure in the extruder, and facilitating the locking and loosening of the barrel connection in a confined space. Attached Figure Description

[0023] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0024] Figure 1 A partial structural schematic diagram of a screw extruder according to one aspect of the present invention is shown;

[0025] Figure 2 A schematic diagram of the structure at the barrel connection structure provided according to one aspect of the present invention is shown;

[0026] Figure 3 A schematic diagram of the opening and closing mechanism in a barrel connection structure provided according to one aspect of the present invention is shown;

[0027] Figure 4 A schematic diagram of the connecting screw in a barrel connection structure provided according to one aspect of the present invention is shown;

[0028] Figure 5 A schematic diagram of the half body in the barrel connection structure provided according to one aspect of the present invention is shown from a first perspective.

[0029] Figure 6 A schematic diagram of the half-body in the barrel connection structure provided according to one aspect of the present invention is shown from a second perspective.

[0030] Figure 7 It shows Figure 5 Schematic diagram of the cross-sectional structure at point AA;

[0031] Figure 8 A schematic diagram of the wire seat in a barrel connection structure provided according to one aspect of the present invention is shown;

[0032] Figure 9 A schematic diagram of the wire seat in the barrel connection structure provided according to one aspect of the present invention is shown from another perspective.

[0033] Figure label:

[0034] 10-Screw extruder; 11-Barrel assembly; 12-Barrel body; 13-Components to be connected; 20-Barrel connection structure; 21-First connecting flange; 22-Second connecting flange; 100-Opening and closing mechanism; 110-Connecting screw; 111-First threaded section; 112-Second threaded section; 113-Connecting section; 114-Groove structure; 120-Half assembly; 121-First half assembly; 122-Second half assembly; 123- Half body; 1231-arc section; 1232-groove; 1233-protruding edge; 1234-first chamfer; 1235-connecting part; 1236-notch; 1237-opening; 124-thread seat; 1241-flange; 1242-middle part; 1243-first plane; 1244-second plane; 1245-screw hole; 1246-second chamfer; 125-baffle; 1251-first connecting hole; 130-RV reducer. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0036] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use, and does 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 invention.

[0037] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable 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, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Figure 1 This is a partial structural schematic diagram of the screw extruder 10 provided in this embodiment. Figure 2 This is a schematic diagram of the structure at point 20 of the barrel connection structure provided in this embodiment. Figure 3This is a schematic diagram of the opening and closing mechanism 100 in the barrel connection structure 20 provided in this embodiment. Figure 4 This is a schematic diagram of the connecting screw 110 in the barrel connection structure 20 provided in this embodiment. Please refer to the diagram for further details. Figures 1-4 This embodiment provides a barrel connection structure for a screw extruder, hereinafter referred to as barrel connection structure 20, and also provides a screw extruder 10.

[0040] like Figure 1 As shown, the screw extruder 10 includes a barrel assembly 11, and also includes other components located at both ends of the barrel assembly 11. These other components at both ends of the barrel assembly 11 are connected to the barrel body 12 of the barrel assembly 11, and can also be referred to as components to be connected 13. Specifically, in this embodiment, the components to be connected 13 are a speed reducer and an extrusion die.

[0041] The barrel connection structure 20 is the structure at the connection point between the barrel assembly 11 and the component 13 to be connected in the screw extruder 10, such as... Figure 2 As shown, the barrel connection structure 20 includes a barrel body 12, a component 13 to be connected, and an opening / closing mechanism 100. The barrel body 12 has first connecting flanges 21 at both ends, and the component 13 to be connected has a second connecting flange 22 at its end. After the first connecting flanges 21 and the second connecting flanges 22 are aligned, they are clamped by the opening / closing mechanism 100, thereby achieving a fixed connection between the barrel body 12 and the component 13 to be connected. The barrel body 12 can be considered as the barrel portion of the barrel assembly 11.

[0042] The opening and closing mechanism 100 includes two paired half-assemblies 120 and connecting screws 110 for connecting the two half-assemblies 120. Specifically, the two half-assemblies 120 are a first half-assembly 121 and a second half-assembly 122, which are arranged opposite each other, thereby forming a space between the first half-assembly 121 and the second half-assembly 122 to accommodate a first connecting flange 21 and a second connecting flange 22. Both ends of the first half-assembly 121 and the second half-assembly 122 are connected by connecting screws 110. In other words, in this embodiment, an opening and closing mechanism 100 has two connecting screws 110. Figure 4As shown, the connecting screw 110 has a first threaded section 111 and a second threaded section 112 distributed along the axial direction. The first threaded section 111 is screwed to the first half-assembly 121, and the second threaded section is screwed to the second half-assembly 122. The first threaded section 111 and the second threaded section 112 have opposite directions of rotation. Thus, when the connecting screw 110 rotates, it can drive the first half-assembly 121 and the second half-assembly 122 to move in opposite directions along the axial direction of the connecting screw 110. That is, the first half-assembly 121 and the second half-assembly 122 move relatively closer or relatively farther apart, thereby locking or loosening the first connecting flange 21 and the second connecting flange 22.

[0043] The barrel connection structure 20 provided in this embodiment will be further described below:

[0044] Figure 5 This is a schematic diagram of the half-body 123 in the barrel connection structure 20 provided in this embodiment from a first-view perspective. Figure 6 This is a schematic diagram of the half-body 123 in the barrel connection structure 20 provided in this embodiment from a second perspective. Figure 7 for Figure 5 A schematic diagram of the cross-sectional structure at point AA. Please refer to the diagram. Figures 1-7 In this embodiment, the half assembly 120 includes a half body 123, the half body 123 having an arc-shaped segment 1231 and connecting portions 1235 located at both circumferential ends of the arc-shaped segment 1231. The arc-shaped segment 1231 is used to form a space to accommodate the first connecting flange 21 and the second connecting flange 22, and the connecting portions 1235 are used to connect with the connecting screw 110.

[0045] Specifically, the arc segment 1231 is a ring-shaped structure with a central angle of slightly less than 180°. The connecting parts 1235 on both sides of the arc segment 1231 extend in the same straight line direction away from the arc segment 1231, and the direction of extension is the direction of the chord of the circle in which the arc segment 1231 is located. In this embodiment, the structures of the first half-assembly 121 and the second half-assembly 122 are basically the same. In other words, the half-body 123 of the first half-assembly 121 and the half-body 123 of the second half-assembly 122 have basically the same structure. During installation, the half-body 123 of the first half-assembly 121 and the half-body 123 of the second half-assembly 122 are installed in opposite directions, so that the concave surface of the arc-shaped segment 1231 of the first half-assembly 121 faces the concave surface of the arc-shaped segment 1231 of the second half-assembly 122. In this way, the arc-shaped segments 1231 of the first half-assembly 121 and the arc-shaped segments 1231 of the second half-assembly 122 can be fastened together to form a roughly annular structure, which wraps and clamps the first connecting flange 21 and the second connecting flange 22. It is understood that in some other embodiments, the structures of the first half-assembly 121 and the second half-assembly 122 can be specifically set according to requirements. For example, the structure of the first half-assembly 121 can be set to be different from that of the second half-assembly 122.

[0046] Furthermore, a groove 1232 is provided on the concave surface of the arc-shaped segment 1231. The groove 1232 extends circumferentially along the arc-shaped segment 1231 and is used to hold the first connecting flange 21 and the second connecting flange 22. The bottom of the groove 1232 is used to fit against the outer peripheral surfaces of the first connecting flange 21 and the second connecting flange 22. Specifically, in this embodiment, the width of the groove 1232 is the sum of the thicknesses of the first connecting flange 21 and the second connecting flange 22. Thus, when the first half-assembly 121 and the second half-assembly 122 move towards each other to clamp the first connecting flange 21 and the second connecting flange 22, the outer peripheral edges of the first connecting flange 21 and the second connecting flange 22 are embedded in the groove 1232. The bottom radius of the groove 1232 is the same as the radius of the first connecting flange 21 and the second connecting flange 22. Thus, when the outer periphery of the first connecting flange 21 and the outer periphery of the second connecting flange 22 are embedded in the groove 1232, the outer periphery of the first connecting flange 21 and the outer periphery of the second connecting flange 22 are both in contact with the bottom of the groove 1232.

[0047] Furthermore, the arc-shaped segment 1231 has protruding edges 1233 on both sides of the groove 1232. The protruding edges 1233 facing the groove 1232 have a chamfer to guide the first connecting flange 21 and the second connecting flange 22 into the groove 1232. This chamfer is a first chamfer 1234, which helps to achieve a tight fit between the splitter body 123 and the first connecting flange 21, the second connecting flange 22, and the barrel cover. Specifically, in this embodiment, the protruding edges 1233 facing the groove 1232 are generally inclined. Thus, after the chamfering treatment, the cross-section of the formed groove 1232 is a trapezoid with a small bottom and a large top opening. It is understood that in some other embodiments, the chamfering treatment can also be applied only to the wall portion of the protruding edges 1233 facing the groove 1232 to form a bevel.

[0048] Figure 8 This is a schematic diagram of the screw seat 124 in the barrel connection structure 20 provided in this embodiment. Figure 9 This is a schematic diagram of the screw seat 124 in the barrel connection structure 20 provided in this embodiment from another perspective. Please refer to the reference. Figures 1-9 In this embodiment, the half assembly 120 further includes a threaded seat 124 and a baffle 125. A notch 1236 is provided on the connecting portion 1235 of the half body 123, extending through the connecting portion 1235 in a direction perpendicular to it, and having an opening 1237 on the side opposite to the arc-shaped segment 1231. The threaded seat 124 is engaged in the notch 1236 and is used to screw onto the connecting screw 110, thus connecting the half body 123 to the connecting screw 110. When the connecting screw 110 rotates, the threaded seat 124 drives the connected half body 123 to move axially along the connecting screw 110. Meanwhile, the wire seat 124 enters and exits the notch 1236 through the opening 1237 of the notch 1236. After the wire seat 124 enters the notch 1236, the opening 1237 is closed by the connection between the baffle 125 and the half body 123, thereby limiting the wire seat 124 in the notch 1236. When the wire seat 124 needs to be removed, the baffle 125 is first removed from the half body 123 to open the opening 1237. At this time, the wire seat 124 can leave the notch 1236 from the opening 1237.

[0049] Specifically, the baffle 125 is provided with two first connecting holes 1251, and correspondingly, second connecting holes are provided on both sides of the opening 1237. By passing a connecting screw through the first connecting hole 1251 and screwing it into the second connecting hole, the baffle 125 and the connecting part 1235 can be detachably connected. The baffle 125 is a rectangular plate with rounded corners and a smooth finish.

[0050] It should be noted that the specific structure of the half assembly 120 is not limited here. It is understood that in some other embodiments, other structures of the half assembly 120 may also be used, such as providing a threaded hole for connection with the connecting screw 110 directly on the connecting part 1235 of the half body 123.

[0051] Furthermore, the thread seat 124 is a columnar structure with a threaded hole 1245 penetrating it. Both ends of the thread seat 124 along the axial direction of the threaded hole 1245 have flanges 1241, resulting in a structure that is larger at both ends and smaller in the middle. The portion of the thread seat 124 located between the two flanges 1241 can be referred to as the middle portion 1242. During installation, the flanges 1241 at both ends of the thread seat 124 are located on the upper and lower sides of the connecting portion 1235, thus abutting against the opposite end faces of the connecting portion 1235 and restricting the relative movement of the thread seat 124 and the half-body 123 along the axial direction of the threaded hole 1245. Therefore, when the thread seat 124 moves axially relative to the connecting screw 110, it can drive the half-body 123 to move synchronously. Optionally, a chamfer, a second chamfer 1246, is provided at one end of the threaded hole 1245 along the axial direction.

[0052] Furthermore, the notch 1236 results in a U-shape, with an opening 1237 formed on one side of the U-shape. The middle portion 1242 has opposing first planes 1243 and second planes 1244. When the threaded seat 124 is engaged in the notch 1236, the first plane 1243 and the second plane 1244 respectively engage with the opposing side walls of the notch 1236, thereby restricting the rotation of the threaded seat 124 relative to the half body 123. This allows the threaded seat 124 to form a screw mechanism with the connecting screw 110. Consequently, when the connecting screw 110 rotates, the threaded seat 124 moves axially along the connecting screw 110, which helps reduce assembly errors and inconveniences caused during the assembly process.

[0053] Furthermore, the axes of the two connecting screws 110 in the opening and closing mechanism 100 form a third plane, and the first plane 1243 and the second plane 1244 are both arranged parallel to this third plane.

[0054] In this embodiment, the barrel connection structure 20 also includes a driving component connected to the connecting screw 110 to drive the connecting screw 110 to rotate forward or backward, thereby realizing the automatic opening and closing of the opening and closing mechanism 100. Specifically, the driving component includes an RV reducer 130 and a motor (not shown). The RV reducer 130 is mounted on the connecting screw 110 and is drive-connected to the motor, thereby realizing the power transmission between the motor and the connecting screw 110 through the RV reducer 130. Moreover, since the two connecting screws 110 of the opening and closing mechanism 100 need to rotate synchronously, the RV reducers 130 on the two connecting screws 110 are configured to be drive-connected to the same motor. Of course, in some other embodiments, two motors can also be set to drive the two connecting screws 110 to rotate respectively.

[0055] Furthermore, the connecting screw 110 also includes a connecting section 113 (such as...). Figure 4 As shown, the connecting segment 113 is connected to the driving component via a key. Specifically, the connecting segment 113 is connected to the output end of the RV reducer 130 via a key for transmission. In this embodiment, the key is provided on the reducer, and the connecting segment 113 is provided with a groove structure 114 that mates with the key. It is understood that in some other embodiments, the key may also be provided on the connecting segment 113.

[0056] The screw extruder 10 and its barrel connection structure 20 provided in the embodiments of the present invention are assembled by first screwing the threaded seat 124 onto the connecting screw 110, with the two threaded seats 124 on the two connecting screws 110 screwed onto the first threaded section 111 located in the same axial position. Similarly, the two threaded seats 124 on the two connecting screws 110 screwed onto the second threaded section 112 are also located in the same axial position. Then, the two connecting screws 110 are placed on the left and right sides of the barrel connection to be connected, and the two half-screws are connected. The body 123 is placed on the upper and lower sides of the barrel connection, and the wire seat 124 is inserted into the notch 1236 of the half body 123. Then, the baffle 125 is installed to close the opening 1237, thereby limiting the wire seat 124 in the notch 1236 of the half body 123, completing the connection between the wire seat 124 and the half body 123. When the wire seats 124 are installed at both ends of the two half bodies 123, the opening and closing mechanism 100 is assembled, and at this time the barrel connection is located between the two half bodies 123 that are directly opposite each other.

[0057] After assembly, the motor drives the connecting screw 110 to rotate through the RV reducer 130. The two connecting screws 110 rotate in the same direction and at the same speed, thereby causing the first half assembly 121, which is screwed to the first threaded section 111 of the connecting screw 110, to move downward. At the same time, the second half assembly 122, which is screwed to the second threaded section 112 of the connecting screw 110, moves upward. Thus, the first half assembly 121 and the second half assembly 122 are brought closer together, thereby realizing the automatic closing of the opening and closing mechanism 100. Simultaneously, before driving the opening and closing mechanism 100 to perform the closing action, it is necessary to ensure that the groove 1232 on the half body 123 corresponds to the position of the first connecting flange 21 and the second connecting flange 22, so that when the opening and closing mechanism 100 closes, the outer periphery of the first connecting flange 21 and the outer periphery of the second connecting flange 22 can be opened into the groove 1232. This ensures that the axial and radial directions between the two connecting flanges connected by the opening and closing mechanism 100 can be subjected to the closing force from the opening and closing mechanism 100, thereby avoiding the problem of material leakage between the two connecting flanges.

[0058] Similarly, when the opening and closing mechanism 100 needs to be opened, the control motor drives the connecting screw 110 to rotate in the opposite direction through the RV reducer 130. At this time, the first half-assembly 121 screwed to the first threaded section 111 of the connecting screw 110 moves upward, and the second half-assembly 122 screwed to the second threaded section 112 of the connecting screw 110 moves downward. In this way, the first half-assembly 121 and the second half-assembly 122 move away from each other, thereby realizing the automatic opening of the opening and closing mechanism 100.

[0059] The screw extruder 10 and its barrel connection structure 20 are connected to adjacent components via the alignment of the first connecting flange 21 and the second connecting flange 22, and secured by the opening and closing mechanism 100 through axial and radial locking of the two connecting flanges, ensuring reliable connection. Furthermore, the opening and closing mechanism 100 enables automatic opening and closing, significantly reducing assembly difficulty and facilitating assembly in confined spaces. In addition, the screw seat 124 is screwed to the connecting screw 110 to drive the opening and closing, allowing the opening and closing mechanism 100 to withstand the large threads inside the extruder, achieving a tight connection between the barrel body 12 and other components. Simultaneously, this opening and closing structure also allows for smooth operation under dust, high temperature, and strong magnetic interference conditions in the screw extruder 10.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A barrel connection structure for a screw extruder, characterized in that, The barrel connection structure of the screw extruder includes: The barrel body has a first connecting flange at each end; The component to be connected has a second connecting flange for alignment with the first connecting flange; and An opening and closing mechanism is used to clamp and align the first connecting flange and the second connecting flange to fix the barrel body to the component to be connected. The opening and closing mechanism includes a first half-assembly, a second half-assembly, and a connecting screw. The first half-assembly and the second half-assembly are arranged facing each other in the vertical direction, and both ends of the first half-assembly and the second half-assembly are connected by the connecting screw, thereby forming a space between the first half-assembly and the second half-assembly to accommodate the first connecting flange and the second connecting flange. The connecting screw has a first threaded section and a second threaded section distributed along the axial direction. The first threaded section is screwed to the first half-assembly, and the second threaded section is screwed to the second half-assembly. The first threaded section and the second threaded section have opposite directions of rotation, so that when the connecting screw rotates, it drives the first half-assembly and the second half-assembly to move in opposite directions along the axial direction of the connecting screw, thereby locking or loosening the first connecting flange and the second connecting flange. The half-assembly includes a half-body having an arc-shaped segment and connecting portions located at both circumferential ends of the arc-shaped segment. The arc-shaped segment is used to form a space for accommodating the first connecting flange and the second connecting flange, and the arc-shaped segments of the first half-assembly and the second half-assembly are used to engage to form an annular structure; the connecting portions are used to connect with a connecting screw. The half assembly also includes a thread seat and a baffle. The connecting part has a notch that extends through the connecting part in a direction perpendicular to the connecting part and has an opening on the side opposite to the arc segment. The thread seat is engaged in the notch and is used to screw onto the connecting screw. The opening allows the thread seat to enter and exit the notch. The baffle is detachably installed at the opening to close the opening. The threaded seat is provided with a threaded hole for screwing into the connecting screw, and both ends of the threaded seat along the axial direction of the threaded hole have flanges. The flanges are used to hold the end faces of opposite sides of the connecting part to restrict the relative movement of the threaded seat and the half body along the axial direction of the threaded hole. The wire seat, located in the middle between the two flanges, has a first plane and a second plane facing each other. The first plane and the second plane are used to engage with the side walls of the notch to restrict the rotation of the wire seat relative to the half body.

2. The barrel connection structure of the screw extruder according to claim 1, characterized in that, A groove is provided on the concave surface of the arc segment. The groove extends circumferentially along the arc segment and is used to hold the first connecting flange and the second connecting flange. The bottom of the groove is used to fit against the outer peripheral surface of the first connecting flange and the outer peripheral surface of the second connecting flange.

3. The barrel connection structure of the screw extruder according to claim 2, characterized in that, The arc-shaped segment has protruding edges on both sides of the groove, and the protruding edges are chamfered on the side facing the groove to guide the first connecting flange and the second connecting flange into the groove.

4. The barrel connection structure of the screw extruder according to claim 1, characterized in that, The screw hole has a chamfer at one axial end.

5. The barrel connection structure of the screw extruder according to claim 1, characterized in that, The barrel connection structure of the screw extruder also includes a drive component, which is connected to the connecting screw to drive the connecting screw to rotate forward or in reverse.

6. The barrel connection structure of the screw extruder according to claim 5, characterized in that, The connecting screw also includes a connecting section, which is connected to the driving component via a key.

7. A screw extruder, characterized in that, The screw extruder includes the barrel connection structure of the screw extruder as described in any one of claims 1-6.

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