Split machine barrel of double-screw extruder

Abstract

The split type machine barrel comprises a machine base, a machine barrel body, a limiting structure, a rotary connecting mechanism and a pre-separation mechanism, the machine barrel body comprises an upper barrel body and a lower barrel body, and the lower barrel body is fixed on the machine base; the limiting structures are arranged on the upper barrel body and the lower barrel body respectively, and the limiting structures are suitable for limiting relative horizontal movement of the upper barrel body and the lower barrel body in a closed state; the rotary connecting mechanism is fixed to the machine base and provided with a movable part suitable for rotating around the machine base. The pre-separation mechanism is movably mounted on a movable part of the rotary connecting mechanism; the upper cylinder body is mounted on the pre-separation mechanism; wherein the pre-separation mechanism is suitable for driving the upper barrel body and the limiting structure on the upper barrel body to move upwards when the upper barrel body and the lower barrel body are in a closed state. Using abrasion can be reduced, the production reliability is improved, and the maintenance amount is reduced.

Description

Technical Field

[0001] The utility model relates to a split barrel of a twin-screw extruder, belonging to the technical field of extruder barrels. Background Art

[0002] At present, extruders are widely used in the processing of various materials. In order to facilitate the cleaning of residual materials in the barrel and to make it easier to install, disassemble and clean the screw, split barrels are more commonly used.

[0003] After searching the prior art, we discovered Chinese patent publication number CN219522992U, which discloses a hydraulically opened split extruder. This patent utilizes a rotating connection between an upper barrel and a lower barrel to achieve barrel opening and closing. To ensure concentricity between the inner bores of the upper and lower barrels after closing, a locating pin and locating pin hole mating structure was designed. However, in actual use, it was found that, first, because the upper barrel rotates via a hinge, the locating pin and the locating pin hole are difficult to align vertically when nearly closed. During this process, misalignment and friction between the locating pin and the pin hole cause repeated wear, which in turn affects the long-term accuracy of the equipment. Even if wear is mitigated by improving the precision of the fit between the pin hole and the pin shaft, prolonged use inevitably exacerbates the wear, gradually reducing the equipment's repeatable positioning accuracy. More seriously, as wear accumulates, the precise positioning function of the upper and lower barrels may fail, leading to misalignment during operation, affecting the proper functioning of the screw, reducing product quality, and even potentially causing equipment failure and production suspension.

[0004] Furthermore, when the upper cylinder is opened, misalignment and friction between the positioning pin and the pin hole can cause a certain amount of seizure, making the opening operation difficult and increasing the operator's workload. This phenomenon is particularly noticeable in work scenarios that require frequent opening and closing, affecting the operating efficiency and reliability of the equipment. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a split barrel of a twin-screw extruder, which can reduce wear and tear during use, improve production reliability and reduce maintenance workload.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a split barrel of a twin-screw extruder, comprising:

[0007] base;

[0008] A barrel, comprising an upper barrel and a lower barrel, wherein the lower barrel is fixed on the base;

[0009] a limiting structure, the limiting structures being respectively provided on the upper cylinder and the lower cylinder, the limiting structures being adapted to limit the relative horizontal movement of the upper cylinder and the lower cylinder in a closed state;

[0010] A rotary connection mechanism, the rotary connection mechanism being fixed to the machine base and provided with a movable part adapted to rotate around the machine base;

[0011] a pre-separation mechanism, the pre-separation mechanism being movably mounted on a movable member of the rotary connection mechanism;

[0012] The upper cylinder is mounted on the pre-separation mechanism;

[0013] The pre-disengagement mechanism is adapted to drive the upper cylinder and the limiting structure thereon to move upwards when the upper cylinder and the lower cylinder are in a closed state, so as to disengage from the limiting structure on the lower cylinder.

[0014] Furthermore, at least one axially extending arc-shaped groove is provided on the inner sidewalls of the upper cylinder and the lower cylinder;

[0015] When the upper barrel and the lower barrel are in a closed state, the arcuate grooves of the upper barrel and the lower barrel cooperate with each other to form at least one axial channel that penetrates the barrel, and the axial channel is suitable for passing the screw.

[0016] Furthermore, the rotary connection mechanism further comprises:

[0017] An articulated seat, the articulated seat is fixedly mounted on the machine base, and the articulated seat is provided with a first articulated end;

[0018] One end of the movable member is provided with a second hinged end hinged to the first hinged end, and the other end is an abutting end;

[0019] Wherein, the pre-separation mechanism is installed on the movable part.

[0020] Furthermore, the split barrel of the twin-screw extruder further includes a movement limiting mechanism, and the movement limiting mechanism includes:

[0021] A stop block, the stop block being fixedly mounted on the machine base;

[0022] an abutment rod, the abutment rod being mounted on the abutment end of the movable member;

[0023] When the upper cylinder and the lower cylinder are in a closed state, the abutment rod abuts against the stop block, thereby limiting the movable range of the movable member.

[0024] Furthermore, a flexible abutting portion is provided at one end of the abutting rod abutting against the stop block.

[0025] Furthermore, the pre-detachment mechanism includes:

[0026] at least one through rod, the through rod passing through the movable member and connected to the upper cylinder;

[0027] An operating rod, the operating rod being fixedly mounted on the penetrating rod;

[0028] The operating rod is suitable for driving the upper cylinder to move through the penetrating rod.

[0029] Furthermore, two penetration rods are provided.

[0030] Furthermore, the limiting structure of the split barrel of the twin-screw extruder includes:

[0031] at least one positioning pin, the positioning pin being fixedly mounted on the lower cylinder;

[0032] The upper cylinder is provided with positioning pin holes corresponding to the number and positions of the positioning pins;

[0033] Wherein, when the upper cylinder and the lower cylinder are closed, the positioning pins are suitable for being inserted into corresponding positioning pin holes.

[0034] By adopting the above technical solution, the utility model has the following beneficial effects:

[0035] In the present invention, when the upper and lower cylinders need to be separated, the pre-disengagement mechanism first drives the upper cylinder upward, pre-releasing the engagement state of the upper and lower cylinder's limiting structures. Next, the rotary connection mechanism further drives the upper cylinder and the pre-disengagement mechanism away from the lower cylinder, enabling smooth opening. Similarly, when the cylinders need to be closed, the rotary connection mechanism drives the upper cylinder to rotate smoothly above the lower cylinder, the pre-disengagement mechanism descends, and the upper cylinder is pressed downward until it is fully aligned with the lower cylinder, thereby accurately locking the limiting structure and ensuring the stability of the closure.

[0036] In addition, the stop block in the activity limiting mechanism cooperates with the abutment rod, and the abutment rod stops when it moves to the stop block, thereby controlling the motion range of the movable part.

[0037] In summary, the present invention not only significantly reduces the wear of the limiting structure during use and reduces maintenance costs, but also improves production reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the three-dimensional structure of the split barrel of the twin-screw extruder of the present invention;

[0039] Figure 2 It is a partial cross-sectional view of the split barrel of the twin-screw extruder of the present utility model;

[0040] Figure 3 A partial cross-sectional view of the split barrel of the twin-screw extruder of the present invention in a closed state;

[0041] Figure 4 It is a partial cross-sectional view of the split barrel of the twin-screw extruder of the present invention in the open state. DETAILED DESCRIPTION

[0042] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0043] like Figure 1-4 As shown, a split barrel of a twin-screw extruder comprises:

[0044] Base 1;

[0045] The barrel includes an upper barrel 21 and a lower barrel 22, and the lower barrel 22 is fixed on the base 1;

[0046] The limiting structures are respectively provided on the upper cylinder 21 and the lower cylinder 22, and are suitable for limiting the relative horizontal movement of the upper cylinder 21 and the lower cylinder 22 in the closed state;

[0047] The rotary connection mechanism is fixed on the machine base 1 and is provided with a movable part 32 suitable for rotating around the machine base 1;

[0048] A pre-disengagement mechanism, which is movably mounted on the movable member 32 of the rotary connection mechanism;

[0049] The upper cylinder 21 is mounted on the pre-separation mechanism;

[0050] The pre-disengagement mechanism is suitable for driving the upper cylinder 21 and the limiting structure thereon to move upwards when the upper cylinder 21 and the lower cylinder 22 are in a closed state, so as to disengage from the limiting structure on the lower cylinder 22 .

[0051] In this embodiment, if Figure 1 As shown, when it is necessary to separate the upper cylinder 21 and the lower cylinder 22, the upper cylinder 21 is first driven to move upward by the pre-separation mechanism, and the matching state of the limit structure of the upper cylinder 21 and the lower cylinder 22 is pre-released. Then, the upper cylinder 21 and the pre-separation mechanism are further driven to leave the lower cylinder 22 through the rotary connection mechanism, so as to achieve smooth opening. Similarly, when it is necessary to close the cylinder, the rotary connection mechanism drives the upper cylinder 21 to rotate smoothly to the top of the lower cylinder 22, and the pre-separation mechanism descends, driving the upper cylinder 21 to be pressed down until it is completely in contact with the lower cylinder 22, so that the limit structure is accurately locked to ensure the stability of the closure. The entire process can be operated manually in steps, or it can be automatically operated in conjunction with the detection element.

[0052] Specifically, such as Figure 1 As shown, an axially extending arc-shaped groove is provided on the inner side wall of the upper cylinder 21 and the lower cylinder 22;

[0053] When the upper barrel 21 and the lower barrel 22 are in a closed state, the arc-shaped grooves of the upper barrel 21 and the lower barrel 22 cooperate with each other to form an axial channel that penetrates the barrel, and the axial channel is suitable for passing the screw.

[0054] In this embodiment, if Figure 1 As shown, the shape of the arc groove is similar to the combination of two semicircles, which is used for the passage of the twin screws.

[0055] In some embodiments, in order to meet different processing requirements, the upper cylinder 21 and the lower cylinder 22 can be designed with different specifications, and the arc-shaped grooves therein can have different sizes and shapes, not limited to the arc-shaped grooves formed by the combination of two semicircles.

[0056] Specifically, such as Figure 1-3 As shown, the rotary connection mechanism also includes:

[0057] The hinge seat 31 is fixedly mounted on the machine base 1 and has a first hinge end.

[0058] One end of the movable member 32 is provided with a second hinged end hinged to the first hinged end, and the other end is an abutting end;

[0059] The pre-disengagement mechanism is installed on the movable part 32 .

[0060] Specifically, such as Figure 1-3 As shown, the split barrel of the twin-screw extruder further includes a movement limiting mechanism, which may be a structure including:

[0061] A stop block 41 is fixedly mounted on the base 1;

[0062] an abutment rod 42 , the abutment rod 42 being mounted on the abutment end of the movable member 32 ;

[0063] When the upper cylinder 21 and the lower cylinder 22 are in a closed state, the abutting rod 42 abuts against the stop block 41 , thereby limiting the movable range of the movable member 32 .

[0064] Specifically, such as Figure 2-3 As shown, a flexible abutting portion is provided at one end of the abutting rod 42 abutting against the stop block 41 .

[0065] In this embodiment, if Figure 1-3As shown, the function of the movable limiting mechanism is to accurately control the closing position of the upper cylinder 21 and prevent over-closing. The stop block 41 is fixedly mounted on the machine base 1, providing a stable reference point for the entire limiting mechanism. The abutment rod 42 is mounted on the abutment end of the movable part 32. When the upper cylinder 21 and the lower cylinder 22 are closed, the abutment rod 42 abuts against the stop block 41, limiting the range of motion of the movable part 32. A flexible abutment portion is provided at one end of the abutment rod 42 abutting against the stop block 41. The flexible abutment portion can buffer the impact force during closing, reduce mechanical stress, and extend the service life of the equipment. Secondly, it compensates for minor dimensional changes caused by manufacturing errors or thermal expansion to ensure that an ideal sealing effect can be achieved each time it is closed. The specific material of the flexible abutment portion can be rubber.

[0066] Specifically, such as Figure 1 and Figure 3 As shown, the pre-detachment mechanism may have the following structure, including:

[0067] Two penetrating rods 51, the penetrating rods 51 pass through the movable member 32 and are connected to the upper cylinder 21;

[0068] An operating rod 52, the operating rod 52 is fixedly mounted on the penetrating rod 51;

[0069] A connecting block, the connecting block is fixed on the movable member 32;

[0070] Wherein, the connecting block is movably connected to the operating rod 52;

[0071] The operating rod 52 is adapted to drive the upper cylinder 21 to move via the through rod 51 .

[0072] Specifically, such as Figure 1-2 As shown, two penetration rods 51 are provided.

[0073] In this embodiment, if Figure 1-2 As shown, the pre-disengagement mechanism functions to control the upper cylinder 21. A through rod 51 is inserted through the upper cylinder 21, providing stable support and guidance for the entire mechanism. The provision of two through rods 51 ensures that the upper cylinder 21 remains balanced during the disengagement process, preventing it from tilting or becoming stuck. An operating rod 52 is fixedly mounted at the upper end of the through rod 51.

[0074] Specifically, such as Figure 1-2 As shown, the split barrel limiting structure of the twin-screw extruder can be the following structure, including:

[0075] A positioning pin 61, the positioning pin 61 is fixedly mounted on the lower cylinder 22;

[0076] The upper cylinder 21 is provided with positioning pin holes corresponding in number and position to the positioning pins 61;

[0077] When the upper cylinder 21 and the lower cylinder 22 are closed, the positioning pins 61 are adapted to be inserted into the corresponding positioning pin holes.

[0078] In this embodiment, if Figure 1-2 As shown, the limiting structure is used to enable the upper cylinder 21 and the lower cylinder 22 to be accurately aligned when closed and to prevent lateral movement.

[0079] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A split barrel of a twin-screw extruder, characterized in that: include: Machine base (1); A barrel, the barrel comprising an upper barrel (21) and a lower barrel (22), the lower barrel (22) being fixed on the base (1); a limiting structure, the limiting structure being respectively arranged on the upper cylinder (21) and the lower cylinder (22), and the limiting structure being suitable for limiting the relative horizontal movement of the upper cylinder (21) and the lower cylinder (22) in a closed state; A rotary connection mechanism, the rotary connection mechanism being fixed to the machine base (1), and the rotary connection mechanism being provided with a movable part (32) adapted to rotate around the machine base (1); a pre-separation mechanism, the pre-separation mechanism being movably mounted on a movable member (32) of the rotary connection mechanism; The upper cylinder (21) is mounted on the pre-separation mechanism; The pre-disengagement mechanism is suitable for driving the upper cylinder (21) and the limiting structure thereon to move upward when the upper cylinder (21) and the lower cylinder (22) are in a closed state, so as to disengage from the limiting structure on the lower cylinder (22).

2. The split barrel of the twin-screw extruder according to claim 1, characterized in that At least one axially extending arc-shaped groove is provided on the inner side walls of the upper cylinder (21) and the lower cylinder (22); When the upper barrel (21) and the lower barrel (22) are in a closed state, the arc-shaped grooves of the upper barrel (21) and the lower barrel (22) cooperate with each other to form at least one axial channel running through the barrel, and the axial channel is suitable for passing the screw.

3. The split barrel of the twin-screw extruder according to claim 1, wherein The rotary connection mechanism further comprises: An articulated seat (31), the articulated seat (31) is fixedly mounted on the machine base (1), and the articulated seat (31) is provided with a first articulated end; One end of the movable member (32) is provided with a second hinged end hinged to the first hinged end, and the other end is an abutting end; Wherein, the pre-separation mechanism is installed on the movable part (32).

4. The split barrel of the twin-screw extruder according to claim 1, characterized in that Also included is an activity restriction mechanism, the activity restriction mechanism comprising: A stop block (41), wherein the stop block (41) is fixedly mounted on the machine base (1); an abutment rod (42), the abutment rod (42) being mounted on the abutment end of the movable member (32); When the upper cylinder (21) and the lower cylinder (22) are in a closed state, the abutment rod (42) abuts against the stop block (41) to limit the range of motion of the movable member (32).

5. The split barrel of the twin-screw extruder according to claim 4, characterized in that One end of the abutting rod (42) abutting against the stop block (41) is provided with a flexible abutting portion.

6. The split barrel of the twin-screw extruder according to claim 1, characterized in that The pre-disengagement mechanism comprises: at least one penetrating rod (51), the penetrating rod (51) passing through the movable member (32) and connected to the upper cylinder (21); An operating rod (52), wherein the operating rod (52) is fixedly mounted on the penetrating rod (51); The operating rod (52) is suitable for driving the upper cylinder (21) to move through the penetrating rod (51).

7. The split barrel of the twin-screw extruder according to claim 6, characterized in that There are two penetration rods (51).

8. The split barrel of the twin-screw extruder according to claim 1, characterized in that The limiting structure includes: at least one positioning pin (61), wherein the positioning pin (61) is fixedly mounted on the lower cylinder (22); The upper cylinder (21) is provided with positioning pin holes corresponding in number and position to the positioning pins (61); Wherein, when the upper cylinder (21) and the lower cylinder (22) are closed, the positioning pin (61) is suitable for being inserted into the corresponding positioning pin hole.

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