A pneumatic knife device for an open mill

Abstract

The application discloses a pneumatic cutter device of an open mill, which is arranged on one side of the open mill and close to an open mill roller of the open mill. The pneumatic cutter device comprises a pneumatic driving structure, a light shaft, a cutter and a fixing structure. The pneumatic driving structure is mounted on a rack of the open mill through the fixing structure. The cutter is sleeved on the light shaft. The pneumatic driving structure is movably connected with the light shaft and used for driving the light shaft to make reciprocating motion, so as to drive the cutter to be close to or away from the open mill roller. The pneumatic cutter device of the application is composed of the pneumatic driving structure, the light shaft, the cutter and the fixing structure. The pneumatic driving structure is fixedly arranged on the open mill through the fixing structure. The cutter sleeved on the light shaft is driven to make reciprocating motion by the pneumatic driving structure. The manual intervention is reduced. The continuous and automatic production requirement is met. The structure is simple, the operation is safe, the cutting is efficient, and the pneumatic cutter device can be highly integrated with the open mill.

Description

Technical Field

[0001] This application relates to the technical field of open mills, and in particular to a pneumatic cutting device for an open mill. Background Technology

[0002] The open mill is one of the core pieces of equipment in the plasticizing and mixing processes of polymer materials such as rubber and plastics. Its working principle mainly relies on a pair of counter-rotating open milling rollers to repeatedly squeeze, shear, and fold the material, thereby achieving process objectives such as filler dispersion, temperature uniformity, and molecular chain breakage. To obtain sheets or masterbatches that meet the requirements of subsequent processing, the continuous strip of material must be cut along the roller axis after mixing for weighing, transfer, or feeding to the next process. Traditional cutting methods mostly involve manual operation with a cutting knife, which is not only labor-intensive and inefficient, but also significantly affected by human factors in the cut position and cross-sectional quality, easily resulting in defects such as bevels, burrs, or uneven thickness, directly affecting the appearance and performance of the subsequently molded products.

[0003] Although some mechanical cutting devices have appeared on the market, their complex structure and poor adaptability make it difficult to accurately cut rubber materials of different widths and thicknesses. Furthermore, their low integration with open mills makes installation and maintenance inconvenient. Therefore, there is an urgent need for a pneumatic cutting device that is simple in structure, safe to operate, highly efficient in cutting, and highly integrated with open mills to replace traditional manual cutting methods, improve production efficiency and product quality, and reduce labor intensity and safety risks. Utility Model Content

[0004] The purpose of this application is to provide a pneumatic cutting device for an open mill, which has a simple structure, safe operation, high cutting efficiency, and can be highly integrated with the open mill.

[0005] This application provides a pneumatic cutter device for an open mill. The pneumatic cutter device is disposed on one side of the open mill and close to the open mill drum. The pneumatic cutter device includes a pneumatic drive structure, a light shaft, a cutter, and a fixing structure. The pneumatic drive structure is mounted on the frame of the open mill through the fixing structure. The cutter is sleeved on the light shaft. The pneumatic drive structure is movably connected to the light shaft to drive the light shaft to reciprocate, thereby driving the cutter to move closer to or further away from the open mill drum.

[0006] Furthermore, a light shaft mounting seat is provided at the end of the pneumatic drive structure near the open mill drum, and the end of the light shaft is locked in the light shaft mounting seat.

[0007] Furthermore, a limiting groove is formed on the side of the optical axis mounting base away from the frame, and the opening width of the limiting groove is smaller than the maximum width of the limiting groove.

[0008] Furthermore, a bearing is provided at the end of the optical axis, the bearing is located in the limiting groove, and abuts against the side wall and bottom wall of the limiting groove near the pneumatic drive structure.

[0009] Furthermore, the bearing is a rolling bearing, which includes an outer ring, an inner ring, and steel balls fitted between the two. The optical shaft passes through the inner ring and abuts against the bottom wall of the limiting groove, while the outer peripheral wall of the outer ring fits against the side wall of the limiting groove.

[0010] Furthermore, the pneumatic drive structure includes a cylinder, a cylinder shaft, and a fixing component. One end of the fixing structure is fixed to the side wall of the frame, and the other end of the fixing structure is sleeved on the end of the cylinder near the optical axis mounting seat. The side wall of the optical axis mounting seat near the pneumatic drive structure is provided with a mounting hole. One end of the cylinder shaft is located in the cylinder, and the other end of the cylinder shaft extends out of the cylinder and is inserted into the mounting hole. The fixing component is sleeved on the outside of the cylinder shaft and abuts against the outer side wall of the optical axis mounting seat.

[0011] Furthermore, the fixing structure includes a first fixing part, a second fixing part, and a third fixing part. The first fixing part is fixed to the side wall of the frame, and the third fixing part is fixedly connected to the pneumatic drive structure. The first side wall of the second fixing part is connected to the first fixing part, and the second side wall of the second fixing part is connected to the third fixing part. The angle between the first side wall and the second side wall is set to an acute angle so that the angle between the movement direction of the cylinder shaft and the radial direction of the open mill drum is set to an acute angle.

[0012] Furthermore, there are two cutters, which are spaced apart on the optical axis and positioned near the ends of the open mill drum.

[0013] Furthermore, the cutter is arranged in a ring shape, and the optical axis passes through the inner ring area of ​​the cutter, wherein the thickness of the cutter gradually decreases along the radial direction of the optical axis.

[0014] Furthermore, there are two sets of pneumatic cutting devices, which are mirror images of each other about the central axis of the open mill.

[0015] Unlike existing technologies, the pneumatic cutter device of this application consists only of a pneumatic drive structure, an optical shaft, a cutter, and a fixing structure, making its structure simple. The pneumatic cutter device is fixedly installed on one side of the open mill through the fixing structure, close to the open mill drum, allowing for quick disassembly and installation, and easy maintenance. The pneumatic cutter device uses a pneumatic drive structure to drive the cutter, replacing manual cutting and improving operational safety. At the same time, the cutter is uniformly supported by a rigid optical shaft, and its reciprocating trajectory is unique, resulting in straight cuts without bevels or burrs, and with uniform thickness. This leads to good consistency in the appearance and performance of subsequent molding, thereby improving cutting efficiency and cutting quality.

[0016] 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

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the pneumatic cutting device of this application assembled on an open mill.

[0019] Figure 2 yes Figure 1 Front view of a medium-sized open mill;

[0020] Figure 3 yes Figure 1 A schematic cross-sectional view of the intermediate mill along the AA direction;

[0021] Figure 4 yes Figure 1 A schematic diagram of the specific structure of the pneumatic cutting device;

[0022] Figure 5 yes Figure 4 A cross-sectional schematic diagram of the pneumatic cutting device along the BB direction;

[0023] Figure 6 yes Figure 4 Enlarged structural diagram at point C;

[0024] Icon labels:

[0025] 10-Open mill; 11-Frame; 12-Open mill drum; 20-Pneumatic cutter device; 21-Pneumatic drive structure; 211-Optical shaft mounting seat; 212-Limiting groove; 213-Cylinder; 214-Cylinder shaft; 215-Fixing component; 216-Mounting hole; 22-Optical shaft; 221-Bearing; 222-Outer ring; 223-Inner ring; 224-Steel ball; 23-Cutter; 24-Fixing structure; 241-First fixing part; 242-Second fixing part; 243-Third fixing part. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of this application, the pneumatic cutting device for an open mill 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.

[0027] 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.

[0028] Since most existing open mills use manual cutting with a knife, there are problems such as high labor intensity, low efficiency and poor cutting effect. In addition, some mechanical cutting devices have complex structures and poor adaptability, making it difficult to accurately cut rubber materials of different widths and thicknesses. Furthermore, they have low integration with the open mill and are inconvenient to install and maintain. This application provides a pneumatic cutting device for an open mill, which has a simple structure, safe operation, high cutting efficiency and can be highly integrated with the open mill.

[0029] Please see Figures 1-6 , Figure 1 This is a schematic diagram of the pneumatic cutting device of this application assembled on an open mill. Figure 2 yes Figure 1 Front view of a medium-sized mill. Figure 3 yes Figure 1 A 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 pneumatic cutting device. Figure 5 yes Figure 4 A cross-sectional schematic diagram of the pneumatic cutting device along the BB direction. Figure 6 yes Figure 4 A magnified structural diagram at point C.

[0030] like Figures 1-3 As shown, the pneumatic cutter device 20 of this application is disposed on one side of the open mill 10, and close to the open mill drum 12 of the open mill 10. The pneumatic cutter device 20 includes a pneumatic drive structure 21, an optical shaft 22, a cutter 23, and a fixing structure 24. The pneumatic drive structure 21 is mounted on the frame 11 of the open mill 10 through the fixing structure 24. The cutter 23 is sleeved on the optical shaft 22. The pneumatic drive structure 21 is movably connected to the optical shaft 22 and is used to drive the optical shaft 22 to reciprocate, so as to drive the cutter 23 to move closer to or further away from the open mill drum 12. Optionally, the pneumatic drive structure 21 of this embodiment can be linked with the main unit of the open mill 10 to complete online cutting.

[0031] This application uses a pneumatic drive structure 21 to replace manual operation, realizing automatic advance and retreat of the cutter, which can reduce manual intervention and meet the needs of continuous and automated production.

[0032] like Figures 1-4 As shown, in this embodiment, the cutter 23 is arranged in a ring shape, and the optical axis 22 passes through the inner ring region of the cutter 23, wherein the thickness of the cutter 23 gradually decreases along the radial direction of the optical axis 22. Optionally, the optical axis 22 in this embodiment can be a rigid optical axis.

[0033] The cutter 23 of this application is uniformly supported by a rigid optical axis, and its reciprocating trajectory is unique. At the same time, the cutter 23 has a circular cutting edge with a thickness that decreases radially, which can ensure that the cutting edge is always in line with the roller surface of the open milling drum 12, so that the cut is straight, without bevels or burrs, and with uniform thickness. This results in good consistency in appearance and performance of subsequent forming, improving cutting efficiency and cutting quality.

[0034] like Figures 1-4 As shown, this embodiment uses two cutters 23, which are spaced apart and mounted on the optical axis 22, respectively positioned near the end of the open mill roller 12. By using two adjustable-spaced annular cutters, this application can complete both the "edge trimming + width setting" cutting processes in one operation, reducing the number of cutting steps and improving cutting efficiency. Simultaneously, the adjustable spacing allows the cutters 23 to cover the entire width of the rubber material, accommodating different width specifications and improving the applicability of the pneumatic cutter device 20 of this application.

[0035] Specifically, such as Figure 5 and Figure 6 As shown, in this embodiment, the pneumatic drive structure 21 is provided with an optical axis mounting seat 211 at the end near the open mill drum 12, and the end of the optical axis 22 is locked in the optical axis mounting seat 211.

[0036] The optical axis mounting base 211 has a limiting groove 212 formed on the side away from the frame 11, and the opening width of the limiting groove 212 is smaller than the maximum width of the limiting groove 212. A bearing 221 is provided at the end of the optical axis 22, and the bearing 221 is disposed in the limiting groove 212 and abuts against the side wall and bottom wall of the limiting groove 212 near the pneumatic drive structure 21.

[0037] Optionally, the bearing 221 in this embodiment is a rolling bearing, which includes an outer ring 222, an inner ring 223, and steel balls 224 fitted between them. The optical shaft 22 passes through the inner ring 223 and abuts against the bottom wall of the limiting groove 212, while the outer peripheral wall of the outer ring 222 is fitted against the side wall of the limiting groove 212. Wherein, as Figure 4 As shown, the sidewalls of the limiting groove 212 in this embodiment are composed of a long straight wall, a 1 / 4 arc wall, a long straight wall, a 1 / 2 arc wall and a short straight wall from right to left.

[0038] In this embodiment, the radius of the arc wall is designed to be the same as that of the outer ring 222, so that the bearing 221 can be embedded in the limiting groove 212 near the side of the 1 / 4 arc wall, and the limiting structure formed by the 1 / 2 arc wall and the short straight wall is used to complete the limiting installation of the bearing 221.

[0039] This application uses rolling bearings to achieve rolling contact between the outer ring 222 and the side wall of the limiting groove 212, which retains the floating self-aligning ability and changes sliding friction to rolling friction, effectively reducing wear by up to 60% or more, eliminating the need to replace vulnerable parts and reducing production costs.

[0040] Specifically, such as Figure 2 , Figure 3 as well as Figure 5 As shown, the pneumatic drive structure 21 includes a cylinder 213, a cylinder shaft 214, and a fixing member 215. One end of the fixing structure 24 is fixed to the side wall of the frame 11, and the other end of the fixing structure 24 is sleeved on the end of the cylinder 213 near the optical axis mounting seat 211.

[0041] One end of the cylinder shaft 214 is located in the air chamber of the cylinder 213, and the other end of the cylinder shaft 214 extends out of the cylinder 213. The cylinder shaft 214 located in the air chamber abuts against the inner wall of the air chamber and is larger than the opening of the air chamber to prevent the other end of the cylinder shaft 214 from detaching from the cylinder 213 when it extends out of the cylinder 213.

[0042] The optical axis mounting base 211 has a mounting hole 216 on one side wall near the pneumatic drive structure 21. One end of the cylinder shaft 214 is located in the cylinder 213, and the other end of the cylinder shaft 214 extends out of the cylinder 213 and is inserted into the mounting hole 216. The fixing member 215 is sleeved on the cylinder shaft 214 and abuts against the outer side wall of the optical axis mounting base 211.

[0043] Optionally, such as Figure 5 As shown, the diameter of the cylinder shaft 214 gradually decreases from the cylinder 213 to the fixed structure 24, that is, the diameter of the cylinder 213 inserted into the mounting hole 216 is smaller than the diameter of the air chamber opening, which reduces the size of the mounting hole 216 that needs to be opened on the optical axis mounting seat 211.

[0044] While ensuring the opening requirement, this application improves the structural strength and rigidity of the optical axis mounting base 211, including the section modulus and bending / torsional stiffness. The entire optical axis mounting base 211 deforms less and has a longer service life when under load.

[0045] like Figure 1As shown, the fixing structure 24 in this embodiment includes a first fixing part 241, a second fixing part 242 and a third fixing part 243. The first fixing part 241 is fixed to the side wall of the frame 11, the third fixing part 243 is fixedly connected to the pneumatic drive structure 21, the first side wall of the second fixing part 242 is connected to the first fixing part 241, and the second side wall of the second fixing part 242 is connected to the third fixing part 243.

[0046] Specifically, the third fixing part 243 is sleeved on the side of the cylinder 213 where the cylinder opening is located, and abuts against the outer end of the cylinder 213. Optionally, such as Figure 5 As shown, the outer end of the cylinder 213 in this embodiment forms a stepped structure, and the third fixing part 243 is arranged around the side wall of the stepped structure. The thickness of the third fixing part 243 is less than the thickness of the stepped structure, so even if the cylinder shaft 214 is controlled to move back, it will not touch the third fixing part 24.

[0047] The angle between the first sidewall and the second sidewall of the second fixing part 242 is set at an acute angle, so that the angle between the movement direction of the cylinder shaft 214 and the radial direction of the open mill drum 12 is set at an acute angle.

[0048] Optionally, in this embodiment, the axial direction of the cylinder shaft 214 is set at an acute angle of 15°-30° to the radial direction of the open milling drum 12, so that the cutter 23 generates a combined motion of radial pressing and tangential sliding at the moment of cutting, reducing instantaneous impact, reducing the risk of rubber tearing, and at the same time reducing the cylinder thrust requirement by 20%-30%, thus achieving energy saving and consumption reduction.

[0049] Optionally, such as Figures 1-2 As shown, in this embodiment, there are two sets of pneumatic cutting devices 20, which are mirror images of each other about the central axis of the open mill 10. The two ends of the optical axis 22 are fixedly mounted to corresponding optical axis mounting seats 211 via bearings 221.

[0050] The pneumatic cutting device 20 of this application consists only of a pneumatic drive structure 21, an optical shaft 22, a cutter 23, and a fixing structure 24. It has a simple structure. The pneumatic drive structure 21 drives the cutter 23 to move, replacing manual cutting and improving operational safety. The structure and number of cutters 23 and the installation of each component are specifically designed to effectively improve cutting efficiency.

[0051] 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 pneumatic cutting device for an open mill, characterized in that, The pneumatic cutter device is located on one side of the open mill and close to the open mill drum. The pneumatic cutter device includes a pneumatic drive structure, an optical shaft, a cutter, and a fixing structure. The pneumatic drive structure is mounted on the frame of the open mill through the fixing structure. The cutter is sleeved on the optical shaft. The pneumatic drive structure is movably connected to the optical shaft and is used to drive the optical shaft to reciprocate, thereby driving the cutter to move closer to or away from the open mill drum.

2. The pneumatic cutting device according to claim 1, characterized in that, The pneumatic drive structure is provided with an optical shaft mounting seat at the end near the open mill drum, and the end of the optical shaft is locked in the optical shaft mounting seat.

3. The pneumatic cutting device according to claim 2, characterized in that, The optical axis mounting base has a limiting groove on the side opposite to the frame, and the opening width of the limiting groove is smaller than the maximum width of the limiting groove.

4. The pneumatic cutting device according to claim 3, characterized in that, The end of the optical axis is provided with a bearing, which is disposed in the limiting groove and abuts against the side wall and bottom wall of the limiting groove near the pneumatic drive structure.

5. The pneumatic cutting device according to claim 4, characterized in that, The bearing is a rolling bearing, which includes an outer ring, an inner ring, and steel balls fitted between the two. The optical shaft passes through the inner ring and abuts against the bottom wall of the limiting groove. The outer peripheral wall of the outer ring is fitted against the side wall of the limiting groove.

6. The pneumatic cutting device according to claim 3, characterized in that, The pneumatic drive structure includes a cylinder, a cylinder shaft, and a fixing component. One end of the fixing structure is fixed to the side wall of the frame, and the other end of the fixing structure is sleeved on the end of the cylinder near the optical axis mounting seat. The side wall of the optical axis mounting seat near the pneumatic drive structure is provided with a mounting hole. One end of the cylinder shaft is disposed in the cylinder, and the other end of the cylinder shaft extends out of the cylinder and is inserted into the mounting hole. The fixing component is sleeved on the outside of the cylinder shaft and abuts against the outer side wall of the optical axis mounting seat.

7. The pneumatic cutting device according to claim 6, characterized in that, The fixing structure includes a first fixing part, a second fixing part, and a third fixing part. The first fixing part is fixed to the side wall of the frame, and the third fixing part is fixedly connected to the pneumatic drive structure. The first side wall of the second fixing part is connected to the first fixing part, and the second side wall of the second fixing part is connected to the third fixing part. The angle between the first side wall and the second side wall is set to an acute angle so that the angle between the movement direction of the cylinder shaft and the radial direction of the open mill drum is set to an acute angle.

8. The pneumatic cutting device according to claim 1, characterized in that, The number of cutters is two, and the two cutters are spaced apart and sleeved on the optical axis, respectively located near the end of the open mill drum.

9. The pneumatic cutting device according to claim 7, characterized in that, The cutter is arranged in a ring shape, and the optical axis passes through the inner ring area of ​​the cutter, wherein the thickness of the cutter gradually decreases along the radial direction of the optical axis.

10. The pneumatic cutting device according to any one of claims 1-7, characterized in that, The number of pneumatic cutting devices is two sets, and the two sets of pneumatic cutting devices are arranged in a mirror image about the central axis of the open mill.

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