Open mill with anti-sticking structure

Abstract

The application discloses a two-roll mill with anti-sticking structures, which comprises a frame, two roll cylinders, a first anti-sticking structure and a second anti-sticking structure. The two roll cylinders are arranged on the frame. The first anti-sticking structure is fixedly arranged on the end of the frame and close to the peripheral wall of the roll cylinder. The second anti-sticking structure is fixedly arranged on the top of the frame and between the two roll cylinders. The first anti-sticking structure comprises a driving device and a first scraper. The driving device drives the first scraper to adhere to or move away from the roll cylinder adjacent to the first anti-sticking structure. The second anti-sticking structure comprises a fixing device and a second scraper. The fixing device adjusts and fixes the distance between the second scraper and the two roll cylinders. The two side walls of the second scraper adhere to the peripheral walls of the two roll cylinders respectively. The first anti-sticking structure and the second anti-sticking structure which adhere to the two roll cylinders respectively can completely clean the roll cylinder of the two-roll mill.

Description

Technical Field

[0001] This application relates to the technical field of open mills, and in particular to an open mill with an anti-sticking structure. Background Technology

[0002] The open mill is a key piece of equipment for plasticizing, mixing, or hot-refining highly elastic materials such as rubber and plastics. Its core consists of two opposing rotating open mill rollers. During operation, the material is compressed and sheared within the roller gap, coating the roller surface and being repeatedly tumbled as the rollers rotate. High-filler, low-Money, or heat-sensitive rubber compounds readily adhere to the roller surface, forming an unevenly thick layer of material covering the rollers. The thicker the layer, the more difficult it is to maintain a stable roller gap geometry, leading to decreased mixing uniformity and large batch-to-batch variations. Therefore, it is necessary to remove the material adhering to the rollers.

[0003] However, most companies still use manual methods to clean rollers, such as copper knives, bamboo brushes, or solvent wiping. Cleaning rollers requires slowing down or stopping the machine, disrupting continuous production and increasing solvent evaporation and dust pollution. Metal scrapers can also introduce scratches on the roller surface, shortening the lifespan of the chrome plating. Alternatively, while some equipment is equipped with fixed scrapers, they generally use a single-roller, single-side layout, meaning only the lower roller or the discharge side is scraped, leaving the other roller and the triangular area between rollers as "dead zones," where material still sticks. Furthermore, the gap between the blade and the roller surface cannot be finely adjusted online after leaving the factory; after wear or temperature changes, it either doesn't stick tightly or presses too hard, resulting in incomplete scraping or chipped blades, which actually exacerbates roller sticking.

[0004] Therefore, developing an anti-sticking structure that can simultaneously provide elastic bonding between the two rollers during operation, is online adjustable, and thoroughly cleans the rollers has become an urgent need to improve the automation level of open mills, reduce labor costs, and ensure safe production. Utility Model Content

[0005] The purpose of this application is to provide a two-roll mill with an anti-sticking structure, which can simultaneously elastically bond the two rolls during operation through the anti-sticking structure, and the anti-sticking structure is adjustable online to achieve a thorough roll cleaning effect.

[0006] This application provides a two-roll mill with an anti-sticking structure. The two-roll mill includes a frame, two two-roll mills, a first anti-sticking structure and a second anti-sticking structure. The two two-roll mills are mounted on the frame. The first anti-sticking structure is fixedly mounted at the end of the frame and close to the peripheral wall of the two-roll mills. The second anti-sticking structure is fixedly mounted at the top of the frame and positioned between the two two-roll mills.

[0007] The first anti-sticking structure includes a driving device and a first scraper. The driving device drives the first scraper to adhere to or move away from the open milling drum adjacent to the first anti-sticking structure. The second anti-sticking structure includes a fixing device and a second scraper. The fixing device adjusts and fixes the distance between the second scraper and the two open milling drums, wherein the two side walls of the second scraper are respectively attached to the outer peripheral walls of the two open milling drums.

[0008] Furthermore, the first anti-sticking structure also includes a scraper mounting bracket, which is fixed to the side wall of the frame for mounting the first scraper. One end of the drive device is fixedly mounted on the top of the frame, and the other end of the drive device is rotatably connected to the first scraper. The drive device is a pneumatic drive device.

[0009] Furthermore, the drive device includes a cylinder and a cylinder shaft, and the first anti-sticking structure also includes a scraper lever. The cylinder is mounted on the top of the frame via a fixed base, and the cylinder shaft extends out from the side of the cylinder away from the fixed base. The cylinder shaft is rotatably connected to the first scraper via the scraper lever.

[0010] Furthermore, a drive shaft is inserted through the center of the first scraper's blade holder, and a blade extends forward from the bottom of the blade holder. The scraper lever is sleeved on the drive shaft; wherein, the scraper lever is an arc-shaped piece.

[0011] Furthermore, the thickness of the blade tip gradually decreases to form a slope, which fits against the outer surface of the open mill drum.

[0012] Furthermore, there are two sets of the first anti-sticking structure, which are located at both ends of the frame and respectively close to an open milling drum.

[0013] Furthermore, the two sets of first anti-sticking material structures are located at opposite corners of the frame.

[0014] Furthermore, the fixing device includes a base, a crossbeam, and a scraper mounting seat. The crossbeam and the base are stacked sequentially on the top of the frame, and the scraper mounting seat is installed at the end of the crossbeam near the open mill drum. The scraper mounting seat is provided with positioning holes for adjusting the distance between the scraper and the open mill drum.

[0015] Furthermore, a mounting hole is provided on one side of the second scraper, and a positioning element is sequentially inserted into the mounting hole and the positioning hole to fix the second scraper and the fixing device; the other side of the second scraper forms two inwardly concave arc-shaped structures, and the two arc-shaped structures abut at the apex. When the second scraper is set to fit against the outer peripheral wall of the two open milling drums, the apex is located between the two open milling drums and the tangent point of the direction of gravity.

[0016] Furthermore, there are two sets of the second anti-sticking structure, and the two sets of the second anti-sticking structure are symmetrically arranged along the axial direction of the open mill drum.

[0017] Unlike existing technologies, the open mill of this application includes a frame, two open mill rollers, a first anti-sticking structure, and a second anti-sticking structure. The first anti-sticking structure is fixed to the end of the frame and can independently scrape either of the two open mill rollers. The second anti-sticking structure spans between the two open mill rollers 20, and its double-edged blades simultaneously adhere to the outer peripheral walls of both open mill rollers, achieving continuous online removal of material adhering to the triangular area between the rollers and eliminating the cleaning dead corners left by traditional single-roller single-side scrapers. Furthermore, when the open mill rollers are operating, the first and second anti-sticking structures work simultaneously to clean both open mill rollers without the need for speed reduction or machine stoppage, effectively shortening production time and improving production efficiency and equipment utilization. Simultaneously, the first scraper is driven by a drive device, allowing for real-time adjustment of the first scraper's working posture.

[0018] Furthermore, this application features a modular design for the first and second anti-sticking structures, both of which are fixedly mounted to the frame, facilitating quick assembly and disassembly and enabling rapid blade replacement. Simultaneously, the first and second anti-sticking structures are externally mounted to the existing frame, requiring no modifications to the original rollers, transmission structure, or control system, thus offering strong applicability.

[0019] This application enables thorough cleaning of the rollers of the cutting machine through an adjustable first anti-sticking structure and a second anti-sticking structure that is respectively attached to the two open milling rollers.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0022] Figure 1 This is a schematic diagram of the open mill with an anti-sticking structure as described in this application;

[0023] Figure 2 yes Figure 1 Top view of a medium-sized open mill;

[0024] Figure 3 yes Figure 2 A schematic cross-sectional view of the intermediate mill along the AA direction;

[0025] Figure 4 yes Figure 1 A schematic diagram of the specific structure of the first anti-sticking material;

[0026] Icon labels:

[0027] 1-Open mill; 10-Frame; 20-Open mill drum; 30-First anti-sticking structure; 31-Drive device; 311-Cylinder; 312-Cylinder shaft; 32-First scraper; 321-Scraper holder; 322-Drive shaft; 323-Blade; 324-Slope; 33-Scraper mounting bracket; 34-Scraper lever; 35-Fixing seat; 40-Second anti-sticking structure; 41-Fixing device; 411-Base; 412-Crossbeam; 413-Scraper mounting seat; 414-Positioning hole; 42-Second scraper; 421-Mounting hole; 422-Arc-shaped structure. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this application, the open mill with an anti-sticking structure provided in this application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It is understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0030] Most existing open mills use manual methods such as copper knives, bamboo brushes, or solvent wiping to clean the rolls, which is inefficient and prone to contamination or damage. While some machines are equipped with fixed scrapers, they generally use a single-roller, single-side layout, resulting in corresponding blind spots in the cleaning process. Furthermore, the blade position is not adjustable, leading to either insufficient adhesion or excessive pressure after wear or temperature changes, resulting in incomplete scraping or blade chipping, which in turn exacerbates roll sticking. Therefore, this application provides an open mill with an anti-sticking structure. During operation, the open mill can simultaneously achieve elastic adhesion between the two rolls through the anti-sticking structure, and the anti-sticking structure is adjustable online, achieving a thorough roll cleaning effect.

[0031] Please see Figures 1-4 , Figure 1 This is a schematic diagram of the open mill with an anti-sticking structure as described in this application. Figure 2 yes Figure 1 A top view of a medium-sized open mill. Figure 3 yes Figure 2A cross-sectional view of the intermediate mill along the AA direction. Figure 4 yes Figure 1 A schematic diagram of the specific structure of the first anti-sticking material.

[0032] like Figures 1-3 As shown, the open mill 1 of this application includes a frame 10, two open mill rollers 20, a first anti-sticking structure 30 and a second anti-sticking structure 40. The two open mill rollers 20 are mounted on the frame 10. The first anti-sticking structure 30 is fixedly mounted at the end of the frame 10 and is located close to the peripheral wall of the open mill rollers 20. The second anti-sticking structure 40 is fixedly mounted on the top of the frame 10 and is located between the two open mill rollers 20.

[0033] Specifically, the first anti-sticking structure 30 includes a driving device 31 and a first scraper 32. The driving device 31 drives the first scraper 32 to adhere to or move away from the open milling roller 20 adjacent to the first anti-sticking structure 30. The second anti-sticking structure 40 includes a fixing device 41 and a second scraper 42. The fixing device 41 adjusts and fixes the distance between the second scraper 42 and the two open milling rollers 20, wherein the two side walls of the second scraper 42 are respectively adhered to the outer peripheral walls of the two open milling rollers 20.

[0034] The first anti-sticking structure 30 of this application is disposed at the end of the frame 10 to achieve independent scraping of either of the two open milling rollers 20. The second anti-sticking structure 40 spans between the two open milling rollers 20, and its double cutting edges simultaneously adhere to the outer peripheral walls of the two open milling rollers 20 to achieve continuous online removal of the sticky material in the triangular area between the rollers, eliminating the cleaning dead corners left by the traditional single-roller single-side scraper.

[0035] Since the first anti-sticking structure 30 is driven to move by the drive device 31, and the second anti-sticking structure 40 is positioned and installed by the fixing device 41, when the open mill 1 is operating, the first anti-sticking structure 30 and the second anti-sticking structure 40 can clean the two open mill rollers 20 at the same time without slowing down or stopping the machine, effectively shortening the production time and improving production efficiency and equipment utilization.

[0036] Specifically, such as Figure 3 As shown, the first anti-sticking material structure 30 in this embodiment also includes a scraper mounting bracket 33, which is fixed to the side wall of the frame 10 and is used to mount the first scraper 32. One end of the drive device 31 is fixedly disposed on the top of the frame 10, and the other end of the drive device 31 is rotatably connected to the first scraper 32.

[0037] The scraper mounting bracket 33 consists of two brackets, which are positioned opposite each other on the side walls of the two frames 10 and at the same height to maintain the horizontality of the first scraper 32.

[0038] Specifically, such as Figure 4 As shown, the drive device 31 in this embodiment includes a cylinder 311 and a cylinder shaft 312. The first anti-sticking structure 30 also includes a scraper lever 34. The cylinder 311 is mounted on the top of the frame 10 through a fixed seat 35. The cylinder shaft 312 extends out of the side of the cylinder 311 away from the fixed seat 35. The cylinder shaft 312 is rotatably connected to the first scraper 32 through the scraper lever 34.

[0039] Optionally, the fixing seat 35 in this embodiment is a triangular fixing seat. The base of the triangular fixing seat is installed on the top of the frame 10 by screws or blind posts and other fasteners. The apex of the triangular fixing seat is fixedly connected to the side of the cylinder 311 away from the first scraper 32.

[0040] The first scraper 32 has a drive shaft 322 passing through its center on the blade holder 321. The bottom of the blade holder 321 extends forward to form a blade 323. The scraper lever 34 is sleeved on the drive shaft 322. The scraper lever 34 is an arc-shaped piece. The thickness of the front end of the blade 323 gradually decreases to form a slope 324, which fits against the outer surface of the open mill drum 20.

[0041] Optionally, the drive shaft 322 is fixedly installed on the blade holder 321 and fixedly connected to the scraper lever 34. Both ends of the drive shaft 322 are respectively engaged in the mounting holes at the center of the scraper mounting brackets 33 at both ends, and the drive shaft 322 extends out from both ends of the blade holder 321, so that the scraper lever 34 is sleeved on the drive shaft 322 and does not abut against the blade holder 321.

[0042] When cylinder 311 drives cylinder shaft 312 to extend, it rotates scraper lever 34, raising cutter holder 321 and blade 323 so that ramp 324 fits against the outer surface of open mill drum 20. When cylinder 311 drives cylinder shaft 312 to retract, it rotates scraper lever 34, lowering cutter holder 321 and blade 323 so that ramp 324 moves away from mill drum 20.

[0043] Optionally, in this embodiment, there are two sets of the first anti-sticking material structure 30. The two sets of the first anti-sticking material structure 30 are disposed at both ends of the frame 10 and respectively close to an open milling drum 20.

[0044] Specifically, two sets of first anti-sticking structures 30 are positioned diagonally across the frame 10. In this embodiment, the two sets of first anti-sticking structures 30 are arranged diagonally across the frame 10, thereby ensuring balanced stress distribution across the open mill 1.

[0045] The drive device 31 in this application is a pneumatic drive device. Compared with hydraulic drive or servo motor drive, pneumatic drive device is cheaper and has a faster drive motor response speed, making it more suitable for short-stroke and high-frequency scenarios.

[0046] Specifically, the cylinder 311, the scraper lever 34, and the drive shaft 322 form a flexible lever system that can complete the "adhesion to roller / removal from roller" switching within 0.3s; the air pressure directly determines the adhesion force, achieving stepless adjustment from 0 to 120N, which avoids both excessive interference that scratches the roller surface and insufficient interference that leaves residual sticky material.

[0047] Specifically, such as Figure 1 and Figure 3 As shown, the fixing device 41 in this embodiment includes a base 411, a crossbeam 412, and a scraper mounting seat 413. The crossbeam 412 and the base 411 are stacked on the top of the frame 10 in sequence, and the scraper mounting seat 413 is installed on the end of the crossbeam 412 near the open mill drum 20. The scraper mounting seat 413 is provided with a positioning hole 414 for adjusting the distance between the scraper and the open mill drum 20.

[0048] The second scraper 42 has a mounting hole 421 on one side, and the positioning member is sequentially inserted into the mounting hole 421 and the positioning hole 414 to fix the second scraper 42 and the fixing device 41. The other side of the second scraper 42 forms two inwardly recessed arc-shaped structures 422, and the two arc-shaped structures 422 abut against the apex. When the second scraper 42 is set to fit against the outer peripheral wall of the two open milling rollers 20, the apex is located between the two open milling rollers 20 and the tangent point of the direction of gravity.

[0049] Optionally, in this embodiment, there are two sets of the second anti-sticking structure 40, and the two sets of the second anti-sticking structure 40 are symmetrically arranged along the axial direction of the open mill drum 20. The two sets of second anti-sticking structures 40 in this embodiment are symmetrical along the axial direction, so that the force on the open mill 1 is balanced.

[0050] The second anti-sticking structure 40 of this application, through the multi-hole positioning structure of the base 411, the crossbeam 412 and the scraper mounting seat 413, can finely adjust the blade position within a precision range of 0.2mm to compensate for gap changes caused by wear or temperature difference, truly achieving "uninterrupted equipment operation and online blade adjustment".

[0051] The open mill 1 of this application achieves thorough cleaning of the open mill drum 20 without dead angles through a modularly designed first anti-sticking structure 30 and second anti-sticking structure 40. Furthermore, the first anti-sticking structure 30 and second anti-sticking structure 40 are fixedly installed, facilitating quick assembly and disassembly and enabling rapid blade replacement. Simultaneously, the first anti-sticking structure 30 and second anti-sticking structure 40 are externally mounted to the existing frame, requiring no modification to the original drum, transmission structure, or control system, thus demonstrating strong applicability.

[0052] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A two-roll mill with an anti-sticking structure, characterized in that, The open mill includes a frame, two open mill rollers, a first anti-sticking structure and a second anti-sticking structure. The two open mill rollers are mounted on the frame. The first anti-sticking structure is fixedly disposed at the end of the frame and close to the peripheral wall of the open mill rollers. The second anti-sticking structure is fixedly disposed at the top of the frame and disposed between the two open mill rollers. The first anti-sticking material structure includes a driving device and a first scraper. The driving device drives the first scraper to adhere to or move away from the open milling drum adjacent to the first anti-sticking material structure. The second anti-sticking material structure includes a fixing device and a second scraper. The fixing device adjusts and fixes the distance between the second scraper and the two open milling drums. The two side walls of the second scraper are respectively attached to the outer peripheral walls of the two open milling drums.

2. The open mill according to claim 1, characterized in that, The first anti-sticking structure further includes a scraper mounting bracket, which is fixed to the side wall of the frame and used to mount the first scraper. One end of the drive device is fixedly disposed on the top of the frame, and the other end of the drive device is rotatably connected to the first scraper. The drive device is a pneumatic drive device.

3. The open mill according to claim 2, characterized in that, The driving device includes a cylinder and a cylinder shaft. The first anti-sticking structure also includes a scraper lever. The cylinder is mounted on the top of the frame via a fixed base. The cylinder shaft extends from the side of the cylinder away from the fixed base. The cylinder shaft is rotatably connected to the first scraper via the scraper lever.

4. The open mill according to claim 3, characterized in that, The first scraper has a drive shaft passing through its center, and the bottom of the scraper extends forward to form a blade. The scraper lever is sleeved on the drive shaft; wherein the scraper lever is an arc-shaped piece.

5. The open mill according to claim 4, characterized in that, The thickness of the blade gradually decreases at the tip to form a slope, which fits against the outer surface of the open mill drum.

6. The open mill according to claim 1, characterized in that, The number of the first anti-sticking material structure is two sets, and the two sets of the first anti-sticking material structure are disposed at both ends of the frame and respectively close to one of the open milling drums.

7. The open mill according to claim 6, characterized in that, Two sets of the first anti-sticking material structures are located diagonally on the frame.

8. The open mill according to claim 1, characterized in that, The fixing device includes a base, a crossbeam, and a scraper mounting seat. The crossbeam and the base are stacked sequentially on the top of the frame. The scraper mounting seat is installed at the end of the crossbeam near the open mill drum. The scraper mounting seat has a positioning hole for adjusting the distance between the scraper and the open mill drum.

9. The open mill according to claim 8, characterized in that, The second scraper has a mounting hole on one side, and a positioning member is sequentially inserted into the mounting hole and the positioning hole to fix the second scraper and the fixing device; the other side of the second scraper forms two inwardly concave arc-shaped structures, and the two arc-shaped structures abut at the apex. When the second scraper is set to fit against the outer peripheral wall of the two open milling drums, the apex is located between the two open milling drums and the tangent point of the direction of gravity.

10. The open mill according to claim 1, characterized in that, The second anti-sticking structure is in two sets, and the two sets of the second anti-sticking structure are symmetrically arranged along the axial direction of the open mill drum.

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