A roll mill pressure mechanism

Abstract

The application is suitable for the technical field of open mill, and provides an open mill material pressing mechanism. The open mill material pressing mechanism provided by the application is used to erect the support on the open mill roller frame, connect the two end plates with the frames at the two ends of the roller, and locate the lower pressing plate between the two rollers of the open mill. Under the cooperation of the first spring, the first guide rod, the limiting part and the upper pressing plate of the pushing assembly, the pressing assembly always has a vertical upward movement trend. The driving device drives the cam to rotate through the rotating shaft, so that the outer contour of the cam pushes the upper pressing plate. The cam has a protruding part, so that the upper pressing plate can perform reciprocating linear motion in the vertical direction, so that the lower pressing plate reciprocally extrudes the rubber between the two rollers. The pressing assembly has a more stable linear reciprocating motion track under the cooperation of the sliding groove and the sliding block, so that the workers can avoid extruding the rubber, improve the production efficiency and avoid safety hazards.

Description

Technical Field

[0001] This application belongs to the field of open mill technology, and particularly relates to an open mill pressing mechanism. Background Technology

[0002] An open mixing mill is a machine that uses two horizontally arranged rollers to mix rubber (plastics) between the two rollers. It is mainly composed of rollers, frame, gap adjustment device and transmission device. The material is drawn into the gap between the two opposing rollers at different linear velocities under the action of friction. The material is subjected to strong shearing and compression through the gap between the rollers, which raises the temperature of the material and increases its plasticity, thereby achieving the purpose of rubber mixing. It is used for plasticizing, mixing, sheeting and hot refining operations.

[0003] When rubber is processed on an open mill, the rubber tends to clump together and get stuck between the two rollers. This makes it difficult for the rubber to enter the gap between the two rollers for compression, resulting in difficulty in rubber intake and affecting processing efficiency.

[0004] When difficulties arise in feeding the rubber, it is often necessary to manually squeeze the rubber material into the two rollers of the open mill, which is inefficient and poses safety hazards. Utility Model Content

[0005] This application provides a pressing mechanism for an open mill, which can solve the following problems.

[0006] This application provides a pressing mechanism for an open mill, including: The support includes two opposing frame plates and a top plate whose ends are respectively connected to the tops of the two frame plates. The frame plates are provided with vertical grooves along their upper edges. A pivot is positioned between two shelf plates and rotatably connected to each of the two shelf plates. A cam, having an eccentric protrusion, is fitted onto a rotating shaft; A drive unit, connected to a rotating shaft and used to drive the rotating shaft to rotate, thereby causing the cam to rotate; A clamping assembly, located on the bottom side of the top plate, includes an upper pressure plate, a lower pressure plate, an end plate, and a slider. The two ends of the upper pressure plate along its length are connected to the two ends of the lower pressure plate along its length via two end plates, and the upper and lower pressure plates are arranged parallel to each other. The slider is located on the side of the end plate away from the other end plate, and the slider can engage with and slide along a groove. A pushing component is disposed on the bottom side of the top plate. The pushing component includes a first guide rod, a first limiting plate, and a first spring. One end of the first guide rod is connected to the bottom surface of the top plate, and the other end passes through the upper pressure plate and is connected to the first limiting plate. The first spring is sleeved on the first guide rod. One end of the first spring abuts against the bottom surface of the upper pressure plate, and the other end abuts against the first limiting plate. The first spring is in a compressed state.

[0007] Optionally, the clamping assembly also includes a buffer plate, a second guide rod, a second limiting plate, and a second spring. The buffer plate is disposed on the bottom side of the lower pressure plate, and the second guide rod is disposed on the top surface of the buffer plate. One end of the second guide rod is connected to the top surface of the buffer plate, and the other end passes through the lower pressure plate and is connected to the second limiting plate. The second spring is sleeved on the second guide rod, with one end abutting against the buffer plate and the other end abutting against the bottom surface of the lower pressure plate.

[0008] Optionally, the clamping assembly also includes a V-shaped plate, which is connected to a buffer plate. The open end of the V-shaped plate faces the buffer plate, and the closed end of the V-shaped plate is set downward in the vertical direction.

[0009] Optionally, the bottom length of the end plate in the vertical direction is less than the top length of the end plate in the vertical direction, and the bottom shape of the end plate is adapted to the V-shaped plate.

[0010] Optionally, the clamping assembly also includes two side plates, each end of which is connected to one end of the upper pressure plate in the width direction, one end of the lower pressure plate in the width direction, and one end of the two end plates, respectively. The upper pressure plate, the lower pressure plate, the two end plates, and the two side plates together form an accommodating space.

[0011] Optionally, there are at least two cams, evenly spaced along the length of the shaft.

[0012] Optionally, the driving device is a handle, which includes a connecting rod and a handle. One end of the connecting rod is connected to one end of the handle and is set at an angle. The connecting rod passes through the frame plate and is connected to the rotating shaft.

[0013] Optionally, the drive unit is a motor, with the drive end of the motor passing through the frame plate and connected to the rotating shaft.

[0014] Optionally, there are multiple pushing components, which are arranged on both sides along the length of the upper pressure plate and are evenly spaced along the length of the upper pressure plate.

[0015] Optionally, the projection of the axis of the rotating shaft in the vertical direction coincides with the centerline of the upper pressure plate in the length direction.

[0016] In use, the open mill pressing mechanism provided in this application has its support mounted on the open mill roller frame, and the two end plates connected to the frames at both ends of the open mill rollers respectively. This allows the lower pressing plate to be positioned in the gap between the two rollers of the open mill. Under the combined action of the first spring, the first guide rod, the limiting part, and the upper pressing plate of the pushing component, the pressing component as a whole always has a vertical upward movement tendency. The driving device causes the rotating shaft to drive the cam to rotate, thereby causing the outer contour of the cam to push against and continuously push the upper pressing plate. Because the cam has a protrusion, the upper pressing plate can reciprocate linearly in the vertical direction under the push of the cam and the action of the pushing component. This allows the lower pressing plate to reciprocate and squeeze the rubber material between the two rollers of the open mill. With the cooperation of the chute and the slider, the pressing component has a more stable linear reciprocating motion trajectory, which can prevent workers from squeezing the rubber material, improve production efficiency, and avoid safety hazards.

[0017] Other beneficial effects of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a two-roll mill and a two-roll mill pressing mechanism provided in an embodiment of this application; Figure 2 A cross-sectional structural schematic diagram of the pressing mechanism of an open mill provided in an embodiment of this application; Figure 3 This is a schematic diagram of the overall structure of the open mill pressing mechanism provided in an embodiment of this application; Figure 4 This is a partial structural schematic diagram of the pressing mechanism of an open mill provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a cam provided in one embodiment of this application.

[0020] [Explanation of Labels in the Attached Image] 10. Bracket; 110. Shelf; 111. Slide rail; 120. Top slab; 20. Shaft; 30. Cam; 310. Protrusion; 40. Drive mechanism; 50. Clamping assembly; 501. Upper pressure plate; 502. Lower pressure plate; 503. End plate; 504. Slider; 505. Buffer pressure plate; 506. Second guide rod; 507. Second limit plate; 508. Second spring; 509. V-shaped plate; 510. Side plate; 60. Drive the components; 610. First guide rod; 620. First limiting plate; 630. First spring; 700. Open mill; 710. Roller; 720. Frame. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0022] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0028] Currently, when there is difficulty in feeding the rubber, it needs to be manually squeezed into the two rollers of the open mill, which is inefficient and poses safety hazards.

[0029] To address the aforementioned problems, one embodiment of this application provides a pressing mechanism for an open mill, such as... Figures 1 to 5 As shown, the pressing mechanism of the open mill includes a support 10, a rotating shaft 20, a cam 30, a drive device 40, a pressing assembly 50, and a pushing assembly 60. The support 10 includes two opposing frame plates 110 and a top plate 120 connected to the top ends of the two frame plates 110 respectively. The frame plates 110 have vertically arranged grooves 111 along their upper edges. The rotating shaft 20 is disposed between the two frame plates 110 and rotatably connected to the two frame plates 110 respectively. The cam 30 has an eccentric protrusion 310 and is sleeved on the rotating shaft 20. The drive device 40 is connected to the rotating shaft 20 and is used to drive the rotating shaft 20 to rotate, thereby driving the cam 30 to rotate. The pressing assembly 50 is located on the bottom side of the top plate 120 and includes an upper pressure plate 501, a lower pressure plate 502, an end plate 503, and a slider 504. The two ends of the upper pressure plate 501 in the length direction are connected to the top plate 120. The upper pressure plate 501 is parallel to the lower pressure plate 502 and is connected to the lower pressure plate 502 at both ends along its length by two end plates 503. The slider 504 is located on the side of the end plate 503 away from the other end plate 503. The slider 504 can engage with the slide groove 111 and slide along the slide groove 111. The pushing assembly 60 is located on the bottom side of the top plate 120. The pushing assembly 60 includes a first guide rod 610, a first limiting plate 620 and a first spring 630. One end of the first guide rod 610 is connected to the bottom surface of the top plate 120, and the other end passes through the upper pressure plate 501 and is connected to the first limiting plate 620. The first spring 630 is sleeved on the first guide rod 610. One end of the first spring 630 abuts against the bottom surface of the upper pressure plate 501, and the other end abuts against the first limiting plate 620. The first spring 630 is in a compressed state.

[0030] In use, the open mill pressing mechanism provided in this application is mounted on the frame 720 of the open mill 700 roller 710. The two end plates 503 are connected to the frames 720 at both ends of the open mill 700 roller 710, respectively. This ensures that the lower pressing plate 502 is located in the gap between the two rollers 710 of the open mill 700. Under the combined action of the first spring 630, the first guide rod 610, the limiting part, and the upper pressing plate 501 of the pushing assembly 60, the pressing assembly 50 always maintains a vertically upward movement tendency. The driving device 40 drives the rotating shaft 20... The rotating cam 30 causes its outer contour to push against and continuously push the upper pressure plate 501. Because the cam 30 has a protrusion 310, the upper pressure plate 501 can reciprocate linearly in the vertical direction under the pushing of the cam 30 and the action of the pushing component 60. This causes the lower pressure plate 502 to reciprocate and squeeze the rubber material between the two rollers 710 of the open mill 700. With the cooperation of the chute 111 and the slider 504, the pressing component 50 has a more stable linear reciprocating motion trajectory. This can prevent workers from squeezing the rubber material, improve production efficiency and avoid safety hazards.

[0031] It should be noted that the cam 30 and the rotating shaft 20 can be connected by a key or through an interference fit to achieve synchronous rotation. The above-mentioned matching method is the commonly used matching method between the cam 30 and the rotating shaft 20 in the prior art. It can be set with reference to the prior art, and will not be elaborated on here.

[0032] It is also understood that the shape and outer contour of the aforementioned cam 30 can be adjusted according to actual working conditions to adjust the travel and speed of the pressing assembly 50.

[0033] In some embodiments of this application, such as Figures 2 to 4 As shown, the clamping assembly 50 also includes a buffer plate 505, a second guide rod 506, a second limiting plate 507, and a second spring 508. The buffer plate 505 is disposed on the bottom side of the lower pressure plate 502. The second guide rod 506 is disposed on the top surface of the buffer plate 505. One end of the second guide rod 506 is connected to the top surface of the buffer plate 505, and the other end passes through the lower pressure plate 502 and is connected to the second limiting plate 507. The second spring 508 is sleeved on the second guide rod 506. One end of the second spring 508 abuts against the buffer plate 505, and the other end abuts against the bottom surface of the lower pressure plate 502.

[0034] When the cam 30 pushes the upper pressure plate 501 downward, the lower pressure plate 502 moves downward simultaneously and compresses the second spring 508. The buffer pressure plate 505 first contacts the surface of the rubber material, and under the elastic action of the second spring 508, it achieves gradual pressure, effectively avoiding damage to the rubber material and equipment from rigid impacts. After the protrusion 310 of the cam 30 rotates past the upper pressure plate 501, the first spring 630 pushes the pressing assembly 50 upward, and the second spring 508 recovers its deformation, causing the buffer pressure plate 505 to reset. With the guiding action of the slider 504 and the groove 111, the entire reciprocating motion is ensured to be smooth, precise, and responsive, further improving the uniformity of rubber extrusion and operational safety. At the same time, the buffer pressure plate 505 has a large contact area with the rubber material and the pressure distribution is uniform, which can effectively prevent material tearing or damage to the roller 710 caused by local overpressure.

[0035] It is understood that the number of the second guide rod 506, the second limiting plate 507 and the second spring 508 can be set to multiple according to the actual working conditions. The second guide rod 506, the second limiting plate 507 and the second spring 508 are evenly distributed between the lower pressure plate 502 and the buffer pressure plate 505 to improve the overall force symmetry and motion stability, and ensure that the buffer pressure plate 505 maintains a horizontal posture during the pressurization and rebound process, so as to avoid jamming or wear caused by uneven load.

[0036] In some embodiments of this application, such as Figures 1 to 4 As shown, the clamping assembly 50 also includes a V-shaped plate 509, which is connected to the buffer plate 505. The open end of the V-shaped plate 509 faces the buffer plate 505, and the closed end of the V-shaped plate 509 is set downward in the vertical direction.

[0037] The open end (i.e. the pointed end) of the V-shaped plate 509 faces the gap between the two rollers 710 of the open mill 700, which allows it to penetrate deeper into the gap between the two rollers 710 when pressed down. This pushes the rubber material into the depth of the gap between the two rollers 710. Combined with the rotation of the two rollers 710 themselves, the rubber material between the two rollers 710 can be better wrapped by the rollers 710, thereby improving the wrapping effect of the rubber material and the plasticization uniformity, and reducing the accumulation of rubber material.

[0038] In some embodiments of this application, such as Figure 4 As shown, the length of the bottom end of the end plate 503 in the vertical direction is less than the length of the top end of the end plate 503 in the vertical direction, and the bottom shape of the end plate 503 is adapted to the V-shaped plate 509.

[0039] The bottom of the end plate 503 is adapted to the shape of the V-shaped plate 509, ensuring that the V-shaped plate 509 does not interfere with the end plate 503 when it moves to its highest point in the vertical direction, thus ensuring smooth movement. At the same time, this structural design helps reduce the overall height of the equipment, improves space utilization, and meets the engineering requirements for a compact layout.

[0040] In some embodiments of this application, such as Figures 2 to 4 As shown, the clamping assembly 50 also includes two side plates 510. Each end of the side plates 510 is connected to one end of the upper pressure plate 501 in the width direction, one end of the lower pressure plate 502 in the width direction, and one end of the two end plates 503, respectively. The upper pressure plate 501, the lower pressure plate 502, the two end plates 503 and the two side plates 510 together form an accommodating space.

[0041] The aforementioned side plate 510 serves two purposes: firstly, it prevents foreign objects and adhesive materials from entering the accommodating space and affecting the normal operation of the transmission components; secondly, it enhances the overall structural rigidity of the clamping assembly 50, thereby improving the stability and durability of the equipment under high-frequency reciprocating motion.

[0042] In some embodiments of this application, such as Figure 2 As shown, there are at least two cams 30, which are evenly spaced along the length of the shaft 20.

[0043] Multiple cams 30 rotate synchronously, which can make the pressing component 50 move more stably when pressed down, so that the pressing component 50 does not deviate when moving.

[0044] In some embodiments of this application, such as Figures 1 to 3 As shown, the drive device 40 is a handle (not shown in the figure). The handle includes a connecting rod (not shown in the figure) and a handle (not shown in the figure). One end of the connecting rod is connected to one end of the handle and is set at an angle. The connecting rod passes through the frame plate 110 and is connected to the rotating shaft 20.

[0045] The connecting rod is fixedly connected to the rotating shaft 20. The handle drives the connecting rod to rotate, which in turn drives the rotating shaft 20 to rotate the cam 30 synchronously, thereby driving the pressing assembly 50 to move up and down reciprocally. The operator can achieve precise control of the rubber material pressurization process by holding the handle and applying force. The structure is simple and easy to maintain, and it is suitable for working conditions without a power source or requiring manual adjustment.

[0046] In some embodiments of this application, the driving device is a motor (not shown in the figure), and the driving end of the motor passes through the frame plate and is connected to the rotating shaft.

[0047] The motor drives the rotating shaft to rotate, which enables the cam to rotate continuously and synchronously, thereby driving the clamping assembly to perform continuous and stable up-and-down reciprocating motion, significantly improving work efficiency and automation, and making it suitable for continuous production scenarios.

[0048] In some embodiments of this application, the motor is connected to the rotating shaft 20 via a reducer to adjust the speed and increase the output torque, ensuring that the clamping assembly 50 has stable power and rapid response during reciprocating motion, and adapts to the processing requirements of different rubber materials.

[0049] In some embodiments of this application, such as Figures 1 to 3 As shown, there are multiple pushing components 60, which are arranged on both sides along the length direction of the upper pressure plate 501 and are evenly spaced along the length direction of the upper pressure plate 501.

[0050] In the above embodiments, the symmetrical arrangement of multiple pushing components 60 effectively balances the force on the upper pressure plate 501, avoids local stress concentration, ensures uniform pressure on the rubber material, and improves molding quality. At the same time, the uniform spacing of the pushing components 60 further enhances the overall motion stability, reduces the risk of off-center loading, and improves the reliability of equipment operation.

[0051] In some embodiments, the aforementioned pushing assembly 60 further includes a damper (not shown in the figure). The damper is disposed between the first spring 630 and the upper pressure plate 501 or the first limiting plate 620 to reduce the impact of vibration and impact on the pressing assembly 50, improve the stability and controllability during the movement process, effectively absorb the kinetic energy generated in the reciprocating motion, reduce the collision stress between structural components, extend the service life of the equipment, reduce noise emissions, and improve the working environment. Under high-frequency continuous operation conditions, the damper works with the spring system to achieve force buffering and release, ensuring that the upper pressure plate 501 falls back smoothly and is positioned accurately, further ensuring the consistency of the rubber material pressing and the precision of the finished product. Similarly, a damper can also be provided in the pressing assembly 50 corresponding to the second spring 508, which will not be elaborated on here.

[0052] It should be noted that the above-mentioned damper is a commonly used component in the prior art. Its specific structure and installation method can be selected and set according to the actual working conditions, and will not be elaborated on here.

[0053] In some embodiments of this application, such as Figures 1 to 3 As shown, the projection of the axis of the rotating shaft 20 in the vertical direction coincides with the centerline of the upper pressure plate 501 in the length direction.

[0054] The design of aligning the axis of the aforementioned rotating shaft 20 with the centerline of the upper pressure plate 501 ensures the symmetry of power transmission and the uniformity of load distribution, effectively suppressing the generation of eccentric torque and keeping the upper pressure plate 501 highly stable during its up-and-down reciprocating motion. On the other hand, it avoids the installation space of the push assembly 60 on both sides, facilitating structural layout and assembly maintenance. It also helps to center the overall center of gravity, reducing shaking and wear during operation, and further improving the stability and safety of the equipment. This design can maintain good precision even under long-term high-frequency operation conditions and is suitable for rubber product production scenarios with high requirements for pressing consistency.

[0055] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A pressing mechanism for an open mill, characterized in that, include: The support (10) includes two opposing frame plates (110) and a top plate (120) connected to the top ends of the two frame plates (110) respectively. The frame plates (110) are provided with vertical grooves (111) along their upper edges. A rotating shaft (20) is disposed between the two frame plates (110) and rotatably connected to the two frame plates (110) respectively; A cam (30) having an eccentric protrusion (310) is sleeved on the rotating shaft (20); A drive device (40) is connected to the rotating shaft (20) and is used to drive the rotating shaft (20) to rotate so as to drive the cam (30) to rotate; The pressing assembly (50), located on the bottom side of the top plate (120), includes an upper pressing plate (501), a lower pressing plate (502), an end plate (503), and a slider (504). The two ends of the upper pressing plate (501) in the length direction and the two ends of the lower pressing plate (502) in the length direction are respectively connected by the two end plates (503), and the upper pressing plate (501) and the lower pressing plate (502) are arranged in parallel. The slider (504) is arranged on the side of the end plate (503) away from the other end plate (503). The slider (504) can engage with the slide groove (111) and slide along the slide groove (111). as well as A pushing component (60) is disposed on the bottom side of the top plate (120). The pushing component (60) includes a first guide rod (610), a first limiting plate (620), and a first spring (630). One end of the first guide rod (610) is connected to the bottom surface of the top plate (120), and the other end passes through the upper pressure plate (501) and is connected to the first limiting plate (620). The first spring (630) is sleeved on the first guide rod (610). One end of the first spring (630) abuts against the bottom surface of the upper pressure plate (501), and the other end abuts against the first limiting plate (620). The first spring (630) is in a compressed state.

2. The open mill pressing mechanism according to claim 1, characterized in that, The clamping assembly (50) further includes a buffer plate (505), a second guide rod (506), a second limiting plate (507), and a second spring (508). The buffer plate (505) is disposed on the bottom side of the lower pressure plate (502). The top surface of the buffer plate (505) is provided with a second guide rod (506). One end of the second guide rod (506) is connected to the top surface of the buffer plate (505), and the other end passes through the lower pressure plate (502) and is connected to the second limiting plate (507). The second spring (508) is sleeved on the second guide rod (506). One end of the second spring (508) abuts against the buffer plate (505), and the other end abuts against the bottom surface of the lower pressure plate (502).

3. The open mill pressing mechanism according to claim 2, characterized in that, The clamping assembly (50) also includes a V-shaped plate (509), which is connected to the buffer plate (505). The open end of the V-shaped plate (509) faces the buffer plate (505), and the closed end of the V-shaped plate (509) is set downward in the vertical direction.

4. The open mill pressing mechanism according to claim 3, characterized in that, The length of the bottom end of the end plate (503) in the vertical direction is less than the length of the top end of the end plate (503) in the vertical direction, and the bottom shape of the end plate (503) is adapted to the V-shaped plate (509).

5. The open mill pressing mechanism according to claim 1, characterized in that, The clamping assembly (50) also includes two side plates (510), each end of which is connected to one end of the upper pressure plate (501) in the width direction, one end of the lower pressure plate (502) in the width direction, and one end of the two end plates (503), respectively. The upper pressure plate (501), the lower pressure plate (502), the two end plates (503) and the two side plates (510) together form an accommodating space.

6. The open mill pressing mechanism according to claim 1, characterized in that, There are at least two cams (30), which are evenly spaced along the length of the shaft (20).

7. The open mill pressing mechanism according to claim 1, characterized in that, The drive device (40) is a handle, which includes a connecting rod and a handle. One end of the connecting rod is connected to one end of the handle and is set at an angle. The connecting rod passes through the frame plate (110) and is connected to the rotating shaft (20).

8. The open mill pressing mechanism according to claim 1, characterized in that, The driving device (40) is a motor, and the driving end of the motor passes through the frame plate (110) and is connected to the rotating shaft (20).

9. The open mill pressing mechanism according to claim 1, characterized in that, There are multiple pushing components (60), and the multiple pushing components (60) are arranged on both sides along the length direction of the upper pressure plate (501), and the multiple pushing components (60) are evenly spaced along the length direction of the upper pressure plate (501).

10. The open mill pressing mechanism according to claim 9, characterized in that, The projection of the axis of the rotating shaft (20) in the vertical direction coincides with the centerline of the upper pressure plate (501) in the length direction.

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