Pressing mechanism of open mill and open mill

Abstract

The invention relates to the technical field of open mill equipment, in particular to an open mill material pressing mechanism and an open mill, the open mill material pressing mechanism comprises a rack, a rotating roller, a supporting frame, a hydraulic cylinder and a hydraulic rod, the rotating roller and the supporting frame are both installed on the rack, the hydraulic cylinder is installed above the rack, the open mill material pressing mechanism further comprises a deflector rod, a transmission mechanism, a pressing plate, a rotating column, a locking mechanism and a material overturning rod, the shifting rod is installed on the machine frame through the transmission mechanism, the pressing plate is installed on the machine frame and located over the two rotating rollers, the upper face and the lower face of the pressing plate are arc-shaped faces, the rotating column is installed on the side face of the pressing plate, the material overturning rod is located at the front end of the pressing plate, and the transmission mechanism drives the shifting rod to rotate the rotating column. The hydraulic cylinder drives the rotating column to move up and down periodically, and the rotating column drives the pressing plate to rotate step by step through the transmission mechanism and is matched with the locking mechanism to be fixed.

Description

Technical Field

[0001] This invention relates to the field of open mill equipment technology, specifically to an open mill pressing mechanism and an open mill. Background Technology

[0002] The open mixing mill, also known as an open rubber mixing mill, works by placing rubber material between two opposing rotating rollers at different linear speeds. The rubber material is pulled into the gap between the rollers under the action of friction, and is sheared and squeezed through the gap. The temperature of the rubber material rises and it is reshaped, thus forming a mixture and flattened rubber material.

[0003] When refining natural or synthetic rubber, which requires high temperatures, the pressure between the two rollers is increased by reducing the gap between them. Under this pressure, the rubber compound flows downwards through the gap. However, after refining in the internal mixer, the compound is often in clumps or piles, containing many irregularly sized fragments. Adjusting the roller gap at this point would cause these fragments to fall directly, necessitating additional extrusion. During extrusion, the rubber compound needs to be refining within a specific cycle. Excessive time leads to over-mixing, reducing product performance and causing wear and tear on the equipment due to increased roller temperature, hindering long-term use. Conversely, insufficient time results in uneven mixing of rubber particles and additives, negatively impacting the final product's performance and quality.

[0004] Current technologies typically employ manual, timed tapping and conveying of rubber. However, open mixing mills require maintaining high temperatures when mixing natural rubber and other types of rubber. Furthermore, the mixing process involves various additives and chemicals, and the presence of mechanically risky equipment such as rollers and scrapers makes it impossible to precisely control the specific mixing cycle. While digital instruments solve the safety and precision control issues, they are not suitable for widespread adoption in most factories due to their high skill requirements and costs. They are also difficult to repair after malfunctions, hindering long-term use on production lines. Additionally, high temperatures can affect electronic instruments and controllers, reducing their lifespan and interfering with their normal operation.

[0005] Based on this, the present invention designs a pressing mechanism for an open mill and an open mill. Summary of the Invention

[0006] The present invention provides a pressing mechanism for a two-roll mill and a two-roll mill, which solves the problem of how to control the rubber mixture to be mixed within a fixed period under high temperature conditions, thereby avoiding the mixing time being too long or too short, which would affect the performance and quality of the finished rubber product.

[0007] This invention provides a pressing mechanism for an open mill, comprising a frame, rotating rollers, a support frame, a hydraulic cylinder, and a hydraulic rod. The rotating rollers and support frame are both mounted on the frame. The hydraulic cylinder is mounted above the frame. The mechanism also includes a lever, a transmission mechanism, a pressure plate, a rotating column, a locking mechanism, and a tilting rod. The lever is mounted on the frame via the transmission mechanism. The pressure plate is mounted on the frame and is located directly above the two rotating rollers. The pressure plate has arc-shaped surfaces on both its upper and lower surfaces. The rotating column is mounted on the side of the pressure plate. The tilting rod is located at the front end of the pressure plate. The transmission mechanism drives the lever to rotate. The rotating column is driven by a hydraulic cylinder to move up and down periodically. The rotating column drives the pressure plate to rotate step by step through a transmission mechanism and is fixed in place with a locking mechanism. There are two tilting rods. The tilting rods move towards the center of the rotating rollers when the pressure plate descends. During the tilting process, the pressure plate gradually changes its position and squeezes the rubber material at different positions, thereby avoiding squeezing the rubber material at the same position. On the one hand, it reduces the adhesion of the rubber material, thereby improving the mixing effect of the rubber. On the other hand, it reduces the high temperature contact of the rubber material with the same place, thereby improving the long-term use of the equipment.

[0008] Preferably, the transmission mechanism includes a rack, a gear, a rotating shaft, a ratchet, a engaging gear ring, a connecting rod, a transmission disc, a fixed shaft, a mounting post, a compression spring, a telescopic block, a groove, a fixing plate, and a protrusion. The rack is mounted on a hydraulic rod, the gear is mounted on the frame via the rotating shaft, the ratchet is concentric with the rotating shaft, the engaging gear ring is located on the outer circumference of the ratchet and meshes with the ratchet, the connecting rod is mounted on the engaging gear ring, the transmission disc is connected to the engaging gear ring via the connecting rod, the fixed shaft is mounted on the frame, and the mounting post is mounted on the fixed shaft. On the shaft, the mounting post is fixedly connected to the transmission disc, the compression spring is mounted on the mounting post, the telescopic block is mounted on the other end of the compression spring, the groove is formed on the telescopic block, the groove is trapezoidal in shape, the fixing plate is mounted on the fixing plate facing the telescopic block, the protrusion is an annular structure, of which about 3 / 4 is an outer ring and about 1 / 4 is an inner ring. As the transmission disc rotates, the inclined surface of the trapezoidal groove gradually contacts the diameter change point of the protrusion, thereby causing the telescopic block to move inward, which facilitates the reset of the pressure plate.

[0009] Preferably, the turning rod is hinged to the bottom of the straight rack, and a flat rod is hinged to the turning rod. The two turning rods do not contact each other, thereby avoiding some rubber from adhering to the surface of the rotating roller and affecting the quality of the finished product after subsequent rubber mixing. Since the two turning rods do not contact each other, and the flat rods do not contact each other, the rubber material is always kept rotating on the rotating roller during the turning process. If the flat rod cuts the rubber material, the rubber material may fall directly to the bottom through the gap of the rotating roller.

[0010] Preferably, the locking mechanism includes a bearing plate, a support rod, a fixing rod, a retaining ring, a positioning toothed ring, a drive block, a limiting groove, a limiting block, a return spring, and a pressure block. The bearing plate is installed at the bottom of the hydraulic rod, the support rod is installed on the bearing plate, and the support rod is symmetrically arranged about the center line of the pressure plate. The fixing rod is installed on the left side of the bearing plate, the retaining ring is installed on the bearing plate through the fixing rod, the positioning toothed ring is installed inside the retaining ring, the drive block is installed on the left side of the rotating column, the limiting groove is opened in the drive block, the limiting block is installed in the limiting groove through the return spring, and the pressure block is installed at the end of the drive block away from the center. With the reciprocating motion of the rack, the lever rises step by step, thereby driving the pressure block to rise step by step, and then driving the rotating column to rotate step by step, so that the pressure plate folds step by step, thereby achieving the effect of folding the pressure plate according to the cycle of rubber compound mixing.

[0011] Preferably, a serrated drive disc is installed at the front end of the lever. The diameter of the serrations of the drive disc is equal to the diameter of the pressure block, and the number of serrations of the drive disc is equal to the number of ratchet teeth of the ratchet. By limiting the diameter of the serrations of the drive disc to be equal to the diameter of the pressure block, the lever can precisely engage the serrated drive disc on the pressure block when it drives the pressure block, thereby improving the precision of the device.

[0012] Preferably, the pressure plate is divided into a contact plate and a feeding plate. The contact plate is multi-segmented, and a stop block is installed between two adjacent contact plates. The feeding plate has a cavity, and a slider is installed in the cavity. The slider slides in the cavity under the influence of gravity. An installation rod is installed at the rear end of the cavity, and a push block is rotatably connected to the installation rod. When the push block presses the contact plate, the stop block protrudes outward. A scraper is embedded at the bottom of the stop block. The push block is driven to move by the synchronous force of the drive block or rotating column. It is only necessary to control the push block to move synchronously when the rotating plate is flipped to the limit position, so as to perform longitudinal cutting of the processed rubber material. Therefore, it is possible to achieve the effect of cutting the rubber material with the rotation cycle of the rotating plate.

[0013] Preferably, the scraper is made of aluminum alloy and has a one-way blade. The rear end of the feeding plate is inclined. The aluminum alloy scraper transfers the heat of the rubber material at the roller to the back of the rotating plate. As the processed rubber material is conveyed along the top of the pressure plate, it can be kept at a suitable temperature and gradually cooled. This avoids the processed rubber material cooling down too quickly, which would affect its quality. The pressure plate not only presses the rubber material but also guides the mixed rubber material in conjunction with the scraper, thereby improving the production efficiency of the equipment.

[0014] Preferably, the scraper and the abutment are detachably connected. The tooth spacing on the gear is not equal. The tooth spacing on the rack meshing with the gear gradually increases from top to bottom. As the gear spacing gradually increases, the rotation speed becomes slower and slower. This allows the blade to extend and cut for a certain period of time after the pressure plate is folded, while avoiding the rubber material from missing the fixed cutting cycle due to excessive speed.

[0015] A two-roll mill includes a two-roll mill body, a power mechanism and an adjustment mechanism, and also includes any of the above-mentioned pressing mechanisms. The pressing mechanism is located above the gap between two rotating rollers. The diameter of the circle containing the pressing plate is equal to the diameter of the rotating rollers, so that the pressing plate can synchronously match the rotating rollers. During the rotation of the rotating rollers, the pressing plate can squeeze all the rubber material on the rotating rollers into the gap between the rotating rollers. At the same time, the pressing plate can also shield the rubber material.

[0016] Preferably, a conveyor belt is installed above the open mill body. The end of the conveyor belt near the rotating roller is arc-shaped and corresponds to the arc surface above the pressure plate. This allows the produced rubber material to be directly transported along the conveyor belt. On the one hand, this avoids the rubber material that has been mixed but not transported away, which would cause this part of the rubber material to be mixed again and affect the quality of the finished product. On the other hand, it improves the convenience of the overall device and enables assembly line operation.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. A pressing mechanism for an open mill according to the present invention uses a hydraulic rod to move the pressing plate up and down to compress the mixed rubber. At the same time, a transmission mechanism drives a lever to rotate the rotating column, and a locking mechanism causes the pressing plate to gradually flip within a single cycle of the transmission mechanism. After reaching a fixed cycle, the state of the pressing plate is switched, thereby cutting the mixed rubber.

[0019] 2. The present invention provides a pressing mechanism for an open mill, which controls the working position of the contact plate by the angle of the pressing plate flipping, thereby realizing the switching of the pressing plate between pressing and cutting modes. On the one hand, the pressing position is different each time to avoid local overheating and damage to the pressing plate. On the other hand, it can automatically cut into small pieces of rubber after a fixed rubber mixing cycle is reached for collection.

[0020] 3. The open mill of the present invention selects a pressing mechanism with different numbers of ratchet teeth according to the mixing requirements, and then uses a drive disc with different numbers of serrations to drive the rotation amplitude of the rotating column, thereby controlling the rotation amplitude of the pressing plate and the number of times the turning rod turns the material, thereby realizing the synchronous process of pressing and turning the material within a fixed cycle, thereby improving the uniformity of rubber mixing. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the transmission mechanism;

[0024] Figure 3 This is a schematic diagram of the protrusion in this invention;

[0025] Figure 4 This is a schematic diagram of the installation of the support frame and transmission mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the locking mechanism of the present invention;

[0027] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0028] Figure 7 This is a schematic diagram of the pressure plate of the present invention;

[0029] Figure 8 This is a sectional view of the end of the pressure plate;

[0030] Figure 9 This is a schematic diagram of the gear rack of the present invention.

[0031] In the diagram: 1. Frame; 2. Rotary roller; 3. Support frame; 4. Hydraulic cylinder; 5. Hydraulic rod; 6. Lever; 61. Drive disc; 7. Transmission mechanism; 71. Spur rack; 72. Gear; 73. Shaft; 74. Ratchet; 75. Engaging gear ring; 76. Connecting rod; 77. Transmission disc; 78. Fixed shaft; 79. Mounting column; 710. Compression spring; 711. Telescopic block; 712. Groove; 713. Fixed plate; 714. Protrusion; 8. Pressure plate; 81. Contact plate; 811. Abutment block ; 812, scraper; 82, feed plate; 821, cavity; 821a, slider; 822, mounting rod; 823, push block; 9, rotating column; 10, locking mechanism; 101, bearing plate; 102, support rod; 103, fixing rod; 104, retaining ring; 105, positioning toothed ring; 106, drive block; 107, limit groove; 108, limit block; 109, return spring; 1010, pressure block; 11, tipping rod; 111, flat rod; 12, open mill body; 13, conveyor belt. Detailed Implementation

[0032] To better understand the above solution, the technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 As shown, the present invention provides a pressing mechanism for an open mill, comprising a frame 1, rotating rollers 2, a support frame 3, a hydraulic cylinder 4, and a hydraulic rod 5. The rotating rollers 2 and the support frame 3 are both mounted on the frame 1. The two rotating rollers 2 rotate in opposite directions via a motor and gear 72, thereby compressing the rubber to achieve rubber compounding. The arrangement of the support frame 3 does not interfere with the normal operation of the open mill. The hydraulic cylinder 4 is mounted above the frame 1 and is hydraulically driven. A hydraulic rod 5 is mounted at the bottom of the hydraulic cylinder 4. The invention also includes a lever 6, a transmission mechanism 7, a pressure plate 8, a rotating column 9, a locking mechanism 10, and a tilting rod 11. The lever 6 is mounted on the frame 1 via the transmission mechanism 7. The pressure plate 8 is mounted on the frame 1 and is located directly above the two rotating rollers 2. The pressure plate 8 has arc-shaped surfaces on both its top and bottom surfaces. The initial position of the pressure plate 8 is between its front end and the middle of the two rotating rollers 2. Alignment is achieved by first pressing the rubber material at the front end of the pressure plate 8, and then gradually flipping the pressure plate 8 under the action of the transmission mechanism 7 and the locking mechanism 10. During the flipping process, the pressure plate 8 gradually changes its position, pressing the rubber material at different positions, thus avoiding pressing the rubber material at the same position. This reduces the adhesion of the rubber material, thereby improving the mixing effect of the rubber, and also reduces the high-temperature contact of the rubber material with the same place, thereby improving the long-term use of the equipment. The rotating column 9 is located on the side of the pressure plate 8, and the turning rod 11 is located at the front end of the pressure plate 8. The transmission mechanism 7 drives the lever 6 to rotate the rotating column 9, and the hydraulic cylinder 4 drives the rotating column 9 to move up and down periodically. The rotating column 9 drives the pressure plate 8 to rotate step by step through the transmission mechanism 7 and is fixed with the locking mechanism 10. There are two turning rods 11, and the turning rods 11 move towards the middle of the rotating roller 2 when the pressure plate 8 descends.

[0034] Existing technologies for refining natural or synthetic rubber, which require high temperatures to achieve good mixing results, often rely on manual, timed tapping and transport. The high temperatures, combined with various additives and chemicals, pose a risk to human safety. Furthermore, the time-dependent nature of human activity and workload makes it difficult to precisely control the refining cycle under prolonged conditions. While digital instruments address safety and precise control issues, their high skill requirements and costs make them unsuitable for widespread adoption in most factories. They are also difficult to repair in case of malfunctions, hindering long-term use on production lines. Additionally, high temperatures can damage electronic instruments and controllers, reducing their lifespan and interfering with their normal operation.

[0035] This application uses a hydraulic rod 5 to move the pressure plate 8 up and down, thereby extruding the mixed rubber. At the same time, the transmission mechanism 7 drives the lever 6 to rotate the rotating column 9, and the locking mechanism 10 causes the pressure plate 8 to gradually flip within a single cycle of the transmission mechanism 7. After reaching a fixed cycle, the state of the pressure plate 8 is switched, thereby cutting the mixed rubber and achieving the effect of high-temperature rubber refining within a fixed cycle.

[0036] like Figure 2-3 As shown, the transmission mechanism 7 includes a rack 71, a gear 72, a rotating shaft 73, a ratchet 74, a engaging gear ring 75, a connecting rod 76, a transmission disc 77, a fixed shaft 78, a mounting column 79, a compression spring 710, a telescopic block 711, a groove 712, a fixing plate 713, and a protrusion 714. The rack 71 is mounted on the hydraulic rod 5, and the connection method is that the rack 71 is located inside the support frame 3 and connected to the hydraulic rod 5 through the connecting rod 76. The gear 72 is mounted on the frame 1 through the rotating shaft 73, and the gear 72 can rotate relative to the frame 1. The ratchet 74 is concentric with the rotating shaft 73. The configuration is such that when the rack 71 moves up and down, it drives the gear 72, the shaft 73, and the ratchet 74 to rotate. The engaging ring 75 is located on the outer periphery of the ratchet 74 and meshes with it. The ratchet 74 consists of a ratchet ring, ratchet teeth, and a reciprocating spring. The ratchet teeth are rotatably connected to the ratchet ring. With the direction of the ratchet teeth's arc tip set as the positive direction, when the ratchet 74 rotates in the positive direction, it drives the engaging ring 75 to rotate. When the ratchet 74 rotates in the reverse direction, the ratchet teeth contact the teeth on the engaging ring 75 and are compressed under the action of the reciprocating spring. At this time, the rotation of the ratchet teeth does not drive the engaging ring 75 to rotate, thus achieving unidirectional rotation. The connecting rod 76 is mounted on the engaging gear ring 75. During the rotation of the engaging gear ring 75, the connecting rod 76 rotates. The transmission disc 77 is connected to the engaging gear ring 75 via the connecting rod 76, and thus the transmission disc 77 also rotates synchronously with the engaging gear ring 75. The fixed shaft 78 is mounted on the frame 1, and the mounting post 79 is mounted on the fixed shaft 78. The mounting post 79 is fixedly connected to the transmission disc 77. The compression spring 710 is mounted on the mounting post 79, and the telescopic block 711 is mounted on the other end of the compression spring 710. At this time, the telescopic block 711 can rotate along the compression spring 710. Under the action of the compression spring 710, the plate moves towards the axis of the transmission disc 77. The groove 712 is formed on the telescopic block 711. The groove 712 is trapezoidal in shape. The fixing plate 713 is mounted on the fixing shaft 78. The protrusion 714 is mounted on the side of the fixing plate 713 facing the telescopic block 711. The protrusion 714 has a ring structure, of which about 3 / 4 is the outer ring and about 1 / 4 is the inner ring. As the transmission disc 77 rotates, the inclined surface of the trapezoidal groove 712 gradually contacts the variable diameter point of the protrusion 714, thereby causing the telescopic block 711 to move inward, which facilitates the reset of the pressure plate 8.

[0037] like Figure 4As shown, the turning rod 11 is hinged to the bottom of the rack 71. During the downward movement of the rack 71, it drives the turning rod 11 towards the center of the roller 2, thereby pushing the previously mixed rubber towards the center of the two rollers 2. Combined with the pressure plate 8, this allows the mixed rubber to fuse with the unmixed rubber, continuing the next mixing cycle. Simultaneously, it causes the rubber adhering to the sides of the rollers 2 to gather towards the center. A horizontal rod 111 is hinged to the turning rod 11. The horizontal rod 111 is a conventionally horizontal rod, ensuring that the turning rod 11 moves from... When moving from both sides towards the center, the flat rod 111 remains horizontal, ensuring that the flat rod 111 and the rotating roller 2 are always in tangential contact. This allows the flat rod 111 to scrape off any rubber adhering to the edges, preventing some rubber from sticking to the surface of the roller 2 and affecting the quality of the finished product after subsequent rubber mixing. The two turning rods 11 do not contact each other, and the flat rods 111 do not contact each other either. Thus, during the turning process, the rubber material is always kept rotating on the roller 2. If the flat rod 111 cuts the rubber material, there is a possibility that the rubber material may fall directly to the bottom through the gap in the roller 2.

[0038] like Figure 5-6As shown, the locking mechanism 10 includes a bearing plate 101, a support rod 102, a fixing rod 103, a retaining ring 104, a positioning toothed ring 105, a driving block 106, a limiting groove 107, a limiting block 108, a return spring 109, and a pressure block 1010. The bearing plate 101 is installed at the bottom of the hydraulic rod 5, and the hydraulic rod 5 drives the bearing plate 101 to move downward. The support rod 102 is installed on the bearing plate 101. There are two support rods 102, which form a triangle with the bottom pressure plate 8, thereby improving the stability of the pressure plate 8. The support rods 102 are symmetrically arranged about the center line of the pressure plate 8. The fixing rod 101... 3. Installed on the left side of the support plate 101, the retaining ring 104 is installed on the support plate 101 via the fixing rod 103, thereby fixing the retaining ring 104 relative to the support plate 101 and moving downward synchronously under the action of the hydraulic rod 5. The positioning toothed ring 105 is installed inside the retaining ring 104, and the positioning toothed ring 105 moves synchronously with the retaining ring 104. The driving block 106 is installed on the left side of the rotating column 9, and the driving block 106 is fixedly connected to the rotating column 9. The rotating column 9 rotates relative to the support plate 101. The limiting groove 107 is opened in the driving block 106, and the limiting block 108 is installed on the limiting position via the return spring 109. Within the groove 107, the two ends of the control limiting block 108 are arranged differently, such that the advancing end of the limiting block 108 is an arc surface and the other end is a sharp surface, allowing the limiting block 108 to move upward along the positioning toothed ring 105. The pressure block 1010 is installed at the end of the drive block 106 away from the center. Under the action of the telescopic block 711 and the engaging toothed ring 75, the lever 6 moves upward along the arc direction. At this time, the lever 6 drives the pressure block 1010 to move upward, thereby driving the drive block 106 to rotate upward by a certain amplitude. As the rack 71 reciprocates, the lever 6 rises step by step, thereby driving the pressure block 1010 to move upward. The 010 rises step by step, which in turn drives the rotating column 9 to rotate step by step, causing the pressure plate 8 to fold step by step. This achieves the effect of folding the pressure plate 8 in accordance with the cycle of rubber compound mixing. When the pressure plate 8 is folded to the limit position, in order to reset the pressure plate 8, the existing technology of trigger switch drives the positioning tooth ring 105 to move to the outer edge of the retaining ring 104, which in turn drives the drive block 106 to reset. It should be noted that there are multiple ways to reset the rotating column 9. This is just a simple example. Any existing technology that ensures that the pressure plate 8 can return along the original path when it is folded to the limit position can be used here.

[0039] A serrated drive disc 61 is installed at the front end of the lever 6. The diameter of the serrations of the drive disc 61 is equal to the diameter of the pressure block 1010, and the number of serrations of the drive disc 61 is equal to the number of ratchet teeth of the ratchet 74. By limiting the diameter of the serrations of the drive disc 61 to be equal to the diameter of the pressure block 1010, the lever 6 can precisely engage the serrated drive disc 61 on the pressure block 1010 when driving the pressure block 1010, thereby improving the precision of the device. By setting the number of serrations of the drive disc 61 to be equal to the number of ratchet teeth of the ratchet 74, the specific cycle of the equipment can be determined by the number of serrations of the drive disc 61 when selecting the rubber mixing cycle. At the same time, the drive disc 61 can synchronously drive the pressure plate 8 to rotate periodically with the rotation of the ratchet 74, thereby improving the accuracy of the rubber mixing cycle.

[0040] like Figure 7-8 As shown, the pressure plate 8 is divided into a contact plate 81 and a feeding plate 82. The contact plate 81 is multi-segmented, and abutment blocks 811 are installed between adjacent contact plates 81. The contact plates 81 are hinged together, so that after the contact plates 81 are pressed against each other, the abutment block 811 in the middle will bulge. The feeding plate 82 has a cavity 821, and a slider 821a is installed in the cavity 821. The slider 821a slides in the cavity 821 under the influence of gravity. In the initial position, the slider 821a does not move. At this time, the contact plate 81, the abutment block 811 and the feeding plate 82 form a flat arc surface, which can press the surface of the rubber material. An installation rod 822 is installed at the rear end of the cavity 821. A push block 823 is rotatably connected to the installation rod 822. When the push block 823 presses against the contact plate 81, the abutment block 811 bulges outward. This part adopts the existing technology of a rocker. The specific structure of the push block 823 can be changed according to the actual production and processing needs. Here, the end of the push block 823 is located behind the cavity 821. When the slider 821a slides behind the cavity 821 under the action of gravity, it drives the front end of the push block 823 to press against the center of the rotating roller 2, thereby causing the abutment block 811 to bulge outward. When the pressure plate 8 is reset, the slider 821a is reset under the action of gravity, and the push block 823 is reset under the pressure of the contact plate 81. Of course, the driving method here is not unique. The push block 823 can also be driven to move by the synchronous force of the drive block 106 or the rotating column 9. It is only necessary to control the push block 823 to move synchronously when the rotating plate is flipped to the limit position. The bottom of the abutment block 811 is embedded with a scraper 812, which can longitudinally cut the processed rubber material. Therefore, it can achieve the effect of cutting the rubber material with the rotation cycle of the rotating plate.

[0041] The scraper 812 is made of aluminum alloy and is a one-way blade, enabling unidirectional cutting. This improves safety and prevents equipment malfunctions from going undetected. The rear end of the feeding plate 82 is inclined. Since the adhesive material targeted in this application is a high-temperature adhesive, the aluminum alloy scraper 812 transfers the heat of the adhesive material at the roller 2 to the back of the rotating plate. This allows the processed adhesive material to gradually cool at a suitable temperature as it is conveyed along the pressure plate 8, preventing the processed adhesive material from cooling down too quickly and affecting its quality. The pressure plate 8, in addition to pressing the rubber compound, also guides the mixed rubber compound in conjunction with the scraper 812, thereby improving the production efficiency of the equipment. After the pressure plate 8 is flipped and restored, the mixed rubber compound is processed by external transverse cutting (the flipping rod 11 of this application can also be associated with a cutter, that is, when the pressure plate 8 is flipped to the limit position, the blade inside the flipping rod 11 can be driven to extend, thereby cutting the rubber compound transversely. The specific driving method can adopt the energy storage conversion mechanism in the prior art).

[0042] like Figure 7-9 As shown, the scraper 812 and the abutment block 811 are detachably connected. The distance between the scrapers 812 can be set according to the required width of the rubber material, thereby improving the dimensional adaptability during the production process. The tooth pitch on the gear 72 is not equal. The tooth pitch on the rack 71 that meshes with the gear 72 gradually increases from top to bottom. As the pitch of the gear 72 gradually increases, the rotation speed becomes slower and slower. This allows the blade to have a certain amount of time to cut after the pressure plate 8 is folded over, while avoiding the rubber material missing the fixed cutting cycle due to excessive speed.

[0043] A two-roll mill includes a two-roll mill body 12, a power mechanism and an adjustment mechanism, and also includes any of the above-mentioned pressing mechanisms. The two-roll mill pressing mechanism is located above the gap between two rotating rollers 2. The diameter of the circle containing the pressing plate 8 is equal to the diameter of the rotating roller 2, so that the pressing plate 8 can synchronously match the rotating roller 2. During the rotation of the rotating roller 2, the pressing plate 8 can squeeze all the rubber material on the rotating roller 2 into the gap between the rotating roller 2. At the same time, the pressing plate 8 can also shield the rubber material.

[0044] A conveyor belt 13 is installed above the open mill body 12. The end of the conveyor belt 13 near the rotating roller 2 is arc-shaped and corresponds to the arc surface above the pressure plate 8. This allows the produced rubber material to be directly transported along the conveyor belt. On the one hand, this avoids the rubber material that has been mixed but not transported away, which would cause this part of the rubber material to be mixed again and affect the quality of the finished product. On the other hand, it improves the convenience of the overall device and enables assembly line operation.

[0045] When mixing rubber that requires high-temperature processing, the worker places the prepared rubber material above the rotating roller 2, which can be transferred via a rubber material conveying method. Then, the hydraulic cylinder 4 is driven to work, causing the hydraulic rod 5 to move up and down, which in turn causes the bearing plate 101 to move up and down. The bearing plate 101, through the support rod 102, drives the pressure plate 8 to squeeze the rubber material. The hydraulic rod 5 also drives the rack 71 to move up and down, which in turn drives the gear 72 to move up and down. The gear 72, through the rotating shaft 73, drives the ratchet 74 to rotate, which in turn drives the engaging gear ring 75 to rotate. The engaging gear ring 75, through the connecting rod 76, drives the transmission disc 77 to rotate. The telescopic block 711 inside the transmission disc 77 moves upward along an arc, which in turn drives the lever 6 to move upward along the same path. Meanwhile, when the pressure plate 8 moves downward, it causes the rotating column 9 to move downward, and the lever 6 pushes the pressure block 1010 upward along the same path. The pressure block 1010 moves the driving block 106, and the limiting block 108 in the driving block 106 moves upward synchronously. Under the action of the return spring 109, the limiting block 108 can climb upward along the positioning tooth ring 105 step by step, thereby driving the pressure plate 8 to fold step by step. When the telescopic block 711 is about to change its position due to the protrusion 714 on the fixed plate 713, the lever 6 drives the rotating column 9 to the extreme position, and the limiting block 108 is also at the extreme position of the positioning tooth ring 105. Then, the limiting block 108 is reset by the existing reset mechanism, thereby realizing the reset of the pressure plate 8. When the pressure plate 8 flips to the extreme position, the slider 821a in the cavity 821 slides under the action of gravity, driving the push block 823 to gather towards the center of the rotating roller 2, thereby driving the contact plate 81 to fold, making the scraper 812 protrude, thereby cutting the rubber material.

[0046] The foregoing has shown and described the basic principles and beneficial effects of the present invention. However, the present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its effects and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A pressing mechanism for an open mill, comprising a frame (1), a rotating roller (2), a support frame (3), a hydraulic cylinder (4), and a hydraulic rod (5), wherein the rotating roller (2) and the support frame (3) are both mounted on the frame (1), and the hydraulic cylinder (4) is mounted above the frame (1), characterized in that: It also includes a lever (6), a transmission mechanism (7), a pressure plate (8), a rotating column (9), a locking mechanism (10), and a flipping rod (11). The lever (6) is mounted on the frame (1) through the transmission mechanism (7). The pressure plate (8) is mounted on the frame (1) and is located directly above the two rotating rollers (2). The upper and lower surfaces of the pressure plate (8) are arc-shaped. The rotating column (9) is located on the side of the pressure plate (8). The flipping rod (11) is located at the front end of the pressure plate (8). The transmission mechanism (7) drives the lever (6) to rotate the rotating column (9). The hydraulic cylinder (4) drives the rotating column (9) to move up and down periodically. The rotating column (9) drives the pressure plate (8) to rotate step by step through the transmission mechanism (7) and is fixed in conjunction with the locking mechanism (10). There are two flipping rods (11). The flipping rods (11) move towards the middle of the rotating rollers (2) when the pressure plate (8) descends.

2. The pressing mechanism for an open mill according to claim 1, characterized in that: The transmission mechanism (7) includes a rack (71), a gear (72), a rotating shaft (73), a ratchet (74), a engaging gear ring (75), a connecting rod (76), a transmission disc (77), a fixed shaft (78), a mounting column (79), a compression spring (710), a telescopic block (711), a groove (712), a fixing plate (713), and a protrusion (714). The rack (71) is mounted on the hydraulic rod (5), the gear (72) is mounted on the frame (1) via the rotating shaft (73), the ratchet (74) is concentrically arranged with the rotating shaft (73), the engaging gear ring (75) is located on the outer periphery of the ratchet (74) and meshes with the ratchet (74), and the connecting rod (76) is mounted on the engaging gear ring. On (75), the transmission disc (77) is connected to the engagement gear ring (75) via a connecting rod (76). The fixed shaft (78) is mounted on the frame (1). The mounting post (79) is mounted on the fixed shaft (78). The mounting post (79) is fixedly connected to the transmission disc (77). The compression spring (710) is mounted on the mounting post (79). The telescopic block (711) is mounted on the other end of the compression spring (710). The groove (712) is formed on the telescopic block (711). The groove (712) is trapezoidal in shape. The fixed plate (713) is mounted on the fixed shaft (78). The protrusion (714) is mounted on the side of the fixed plate (713) facing the telescopic block (711).

3. The pressing mechanism for an open mill according to claim 2, characterized in that: The flipping rod (11) is hinged to the bottom of the straight rack (71), and a flat rod (111) is hinged on the flipping rod (11). The two flipping rods (11) do not contact each other.

4. The pressing mechanism for an open mill according to claim 2, characterized in that: The locking mechanism (10) includes a bearing plate (101), a support rod (102), a fixing rod (103), a retaining ring (104), a positioning toothed ring (105), a driving block (106), a limiting groove (107), a limiting block (108), a return spring (109), and a pressure block (1010). The bearing plate (101) is installed at the bottom of the hydraulic rod (5), and the support rod (102) is installed on the bearing plate (101). The support rod (102) is symmetrically arranged about the center line of the pressure plate (8). The fixing rod (103) is installed on the left side of the bearing plate (101). On the side, the retaining ring (104) is mounted on the bearing plate (101) by a fixing rod (103), the positioning toothed ring (105) is mounted inside the retaining ring (104), the driving block (106) is mounted on the left side of the rotating column (9), the limiting groove (107) is opened in the driving block (106), the limiting block (108) is mounted in the limiting groove (107) by a return spring (109), the pressure block (1010) is mounted at the end of the driving block (106) away from the center, and the upper end of the pressure block (1010) is provided with an arc surface corresponding to the lower end of the lever (6).

5. The pressing mechanism for an open mill according to claim 4, characterized in that: The lever (6) has a sawtooth drive disk (61) installed at its front end. The diameter of the sawtooth on the drive disk (61) is equal to the diameter of the pressure block (1010), and the number of sawtooth on the drive disk (61) is equal to the number of ratchet teeth on the ratchet (74).

6. The open mill pressing mechanism according to claim 4, characterized in that: The pressure plate (8) is divided into a contact plate (81) and a feeding plate (82). The contact plate (81) is multi-segmented, and a stop block (811) is installed between two adjacent contact plates (81). A cavity (821) is opened in the feeding plate (82). A slider (821a) is installed in the cavity (821). The slider (821a) slides in the cavity (821) under the influence of gravity. An installation rod (822) is installed at the rear end of the cavity (821). A push plate (823) is rotatably connected to the installation rod (822). When the push plate (823) presses the contact plate (81), the stop block (811) protrudes outward. A scraper (812) is embedded at the bottom of the stop block (811).

7. The pressing mechanism for an open mill according to claim 6, characterized in that: The scraper (812) is made of aluminum alloy and has a one-way blade. The rear end of the feeding plate (82) is an inclined surface.

8. The pressing mechanism for an open mill according to claim 7, characterized in that: The scraper (812) and the abutment (811) are detachably connected. The tooth pitch on the gear (72) is not equal. The tooth pitch on the rack (71) that meshes with the gear (72) gradually increases from top to bottom.

9. A two-roll mill, comprising a two-roll mill body (12), a power mechanism, and an adjustment mechanism, characterized in that: It also includes the open mill pressing mechanism according to any one of claims 1 to 8, wherein the open mill pressing mechanism is located above the roll gap of the two rotating rollers (2), and the diameter of the circle in which the pressing plate (8) is located is equal to the diameter of the rotating rollers (2).

10. A two-roll mill according to claim 9, characterized in that: A conveyor belt (13) is installed above the open mill body (12). The end of the conveyor belt (13) near the roller (2) is arc-shaped and corresponds to the arc surface above the pressure plate (8).

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