A cutting knife assembly of a slitting machine

Abstract

The application relates to the technical field of slitting machines, in particular to a cutter assembly of a slitting machine, which comprises a rack with side plates on both sides, a rotary shaft rotatably arranged on the side plates, cutters arranged in sequence along the length direction of the rotary shaft, and a driving device for driving the rotary shaft to reciprocating rotate. The rotary shaft comprises a square shaft in the middle and circular shafts on both sides. The cutter comprises a cutter holder slidably sleeved on the square shaft along the length direction of the square shaft, and a blade arranged at the front end of the cutter holder. The cutter holder comprises a cutter holder seat which can be sleeved on the square shaft through an opening, a cutter holder gland which covers the opening of the cutter holder seat, and an adjusting member which adjusts the tightness of the cutter holder gland covering the opening of the cutter holder seat. The cutter position is adjusted conveniently and efficiently, the production flexibility is greatly improved, the cutter holder fixing structure is stable and reliable, the service life of the blade is prolonged, the driving device runs stably and controllably, the slitting stability is improved, the overall structure is optimally designed, and the adaptability and safety are higher.

Description

Technical Field

[0001] This utility model relates to the field of slitting machine technology, and more specifically, to a cutting blade assembly for a slitting machine. Background Technology

[0002] In industrial production, slitting machines, as key equipment for the precise processing of wide-width materials, have become indispensable core devices in industries such as packaging, printing, electronics, textiles, and medical devices. Their main function is to slit rolls of wide-width substrates such as films, paper, metal foils, non-woven fabrics, and composite materials into several narrow rolls of specified widths according to production needs, providing the basic materials for subsequent processing, forming, or packaging. With the continuous improvement of modern industry's requirements for material processing precision, production efficiency, and product consistency, the performance of slitting machines directly affects the product quality and market competitiveness of downstream industrial chains. As the core actuator of the slitting machine that directly acts on the material, the structural rationality and operational stability of the cutting assembly are particularly crucial.

[0003] Currently, while the cutting blade components of mainstream slitting machines on the market can meet basic slitting needs, there are still many technical pain points in practical applications, making it difficult to adapt to modern production scenarios that require high precision, high efficiency, and multiple specifications.

[0004] Regarding cutter position adjustment, traditional cutter assemblies often employ a fixed connection between the cutter and the rotary shaft, or an assembly structure requiring complete disassembly. For example, some equipment uses a key and a shoulder to position the cutter. When adjusting the cutter spacing to accommodate different slitting widths, the fixed bearing at the end of the rotary shaft must be removed first, then each cutter and spacer sleeve must be removed individually, recalibrated, and reassembled in reverse. This entire process requires multiple operators and typically takes more than 30 minutes. For flexible production needs involving small batches and multiple shipments, this adjustment method leads to excessive downtime, severely reducing the overall efficiency of the production line. More importantly, repeated disassembly can reduce the precision of the fit between the rotary shaft and the cutter, thus affecting slitting stability.

[0005] Regarding the synchronization of the cutter and the rotating shaft, existing technologies mostly employ a full-circular shaft design for the rotating shaft, with the cutter mounted by fitting its inner hole into the circular shaft. This structure relies on the friction between the cutter's inner hole and the circular shaft to transmit torque. However, during high-speed slitting (linear speeds exceeding 300 m / min) or slitting of high-strength materials (such as aluminum foil and carbon fiber cloth), the friction is often insufficient to resist the slitting resistance, easily leading to relative slippage between the cutter and the rotating shaft. This slippage causes a phase difference between adjacent cutters, resulting in burrs, wavy edges, or misalignment on the edges of the slidable material. For ultra-thin copper foil (only 5 μm thick) used in the electronics industry or high-precision films used in the packaging industry, such defects can directly lead to product scrap, with a scrap rate exceeding 10%.

[0006] Regarding blade fixing and tension adjustment, traditional blade holders typically use multiple sets of bolts for symmetrical fastening. Adjustment requires using a wrench to tighten each bolt individually, which is not only cumbersome but also necessitates strict control of the tightening torque to prevent the blade holder from tilting. In actual production, uneven torque control by operators often leads to blade tilting, causing excessive localized stress on the blade. This not only affects cutting accuracy but also accelerates blade wear and shortens its lifespan (normal blade lifespan is about 8 hours, but may be reduced to 3 hours when tilted). Furthermore, frequent bolt removal can cause thread stripping, reducing the reliability of the blade holder and blade fixation and posing a safety hazard of blade detachment.

[0007] The stability and controllability of the drive unit is another prominent issue. Existing cutter assembly drive methods are mainly divided into two categories: motor-driven and hydraulic-driven. While motor-driven systems have a fast response speed, the impact during reversal is significant when driving the rotary shaft to achieve high-frequency reciprocating rotation (up to 200 times per minute or more), easily causing shaft vibration and affecting slitting accuracy. Hydraulic drives, while operating smoothly, suffer from significant temperature-dependent viscosity of the hydraulic oil, leading to response lag in high-temperature environments and causing asynchrony between cutter movement and material transport. Furthermore, the limiting mechanisms of existing drive units are mostly fixed blocks, unable to adjust the rotation angle of the rotary shaft according to material thickness (e.g., from 10μm to 1mm) or hardness. When slitting thicker materials, insufficient rotation angle leads to incomplete slitting; while when slitting thinner materials, excessive rotation causes excessive contact between the blade and the bottom roller, accelerating wear.

[0008] With the development of new materials technology, slitting machines are facing increasingly diverse processing targets, such as nano-coated films, flexible circuit board substrates, and medical breathable membranes. These new materials have much higher requirements for slitting accuracy (±0.01mm) and surface quality (no scratches, no wrinkles) than traditional materials. The structural defects of traditional cutting assemblies have become a bottleneck restricting the development of the high-end materials processing industry. At the same time, the trend of industrial automation and intelligence requires cutting assemblies to have functions such as rapid changeover and remote monitoring, but the operational complexity and data acquisition capabilities of existing structures are insufficient, making it difficult to integrate them into intelligent production lines.

[0009] Therefore, in view of the shortcomings of existing cutting assemblies in terms of convenient position adjustment, synchronous transmission accuracy, fixed adjustment reliability and drive control stability, it has become an urgent need to develop a cutting assembly with optimized structure, simple operation, high cutting accuracy and strong adaptability to upgrade the technology of slitting machines. This is of great significance to enhancing the competitiveness of my country's high-end material processing equipment.

[0010] Chinese utility model patent CN217573176U discloses a cutting assembly for a slitting machine, comprising: a frame with vertically arranged side plates on both sides; a rotating shaft with its two ends rotatably mounted on the side plates; a cutting blade mounted on the rotating shaft along its length; and a power unit for driving the rotating shaft to rotate back and forth. The rotating shaft is divided into a central square shaft and two round shafts on either side. The cutting blade includes: a cutting blade holder slidably mounted on the square shaft along its axial direction; a first fastening bolt mounted on the cutting blade holder; and a blade mounted on the cutting blade holder for cutting materials. To automatically adjust the vertical position of the cutting blade, a rotating shaft is provided, and the cutting blade is mounted on the rotating shaft. When the power unit drives the rotating shaft to rotate, it also drives the cutting blade to rotate synchronously. However, the fixing structure of the cutting blade is not stable enough, and there is a risk of loosening after prolonged use. Utility Model Content

[0011] The main purpose of this invention is to provide a cutting blade assembly for a slitting machine that allows for easy assembly, replacement, and adjustment of the cutting blade or blade.

[0012] To solve the above-mentioned technical problems, this utility model proposes a cutting blade assembly for a slitting machine, comprising: a frame with vertical side plates on both sides; a rotating shaft, horizontally arranged, with both ends rotatably mounted on the side plates on both sides of the frame; several cutting blades arranged sequentially on the rotating shaft along its length; a driving device, mounted on one of the side plates, for driving the rotating shaft to reciprocate; wherein the rotating shaft includes: a square shaft in the middle and round shafts on both sides; the cutting blade includes: a blade holder, slidably mounted on the square shaft along its length; and a blade mounted on the front end of the blade holder; wherein the blade holder includes: a blade holder base, the bottom of which has a square hole with an opening that can mate with the square shaft, allowing the blade holder base to fit onto the square shaft through the opening; a blade holder cover, covering the opening of the blade holder base; and an adjusting component, mounted on the blade holder cover, for adjusting the tightness of the blade holder cover covering the opening of the blade holder base.

[0013] In the above technical solution, the tool holder further includes: a pressure plate, which is disposed at the front end of the tool holder and cooperates with the tool holder seat to clamp the blade; and a blade knob, one end of which is provided with a bolt, which passes through the pressure plate and is screwed onto the tool holder seat.

[0014] In any of the above technical solutions, one end of the tool holder cover is rotatably connected to the open end of the tool holder seat.

[0015] In any of the above technical solutions, further, the adjusting component is an adjusting handle, one end of which is provided with a handle and the other end is provided with a bolt, which passes through the end of the tool holder cover that is not connected to the tool holder seat and is screwed onto the tool holder seat. In any of the above technical solutions, further, the adjusting component is an adjusting knob, which has a knob at one end and a bolt at the other end, passing through the end of the tool holder cover that is not connected to the tool holder seat, and is screwed onto the tool holder seat. In any of the above technical solutions, the driving device further includes: a cylinder; a connecting member disposed at the top of the cylinder push rod; a swing plate, one end of which is fixedly connected to one end of the rotary shaft and the other end of which is rotatably connected to the connecting member; and a cylinder tail shaft disposed at the tail of the cylinder, so that the tail of the cylinder is rotatably connected to the side plate on which the driving device is mounted. In any of the above technical solutions, a further component includes a limiting device disposed on the side plate above the swing plate, used to limit the rotation angle of the swing plate.

[0016] In any of the above technical solutions, the limiting device further includes: a support plate, which is fixed to the side plate and has a screw hole thereon; and a screw rod, which is screwed into the screw hole of the support plate.

[0017] In any of the above technical solutions, the lower end of the screw is rounded.

[0018] In any of the above technical solutions, a handwheel is further provided at the upper end of the screw.

[0019] Beneficial effects: Compared with existing technologies, 1) The cutter position adjustment is convenient and efficient, greatly improving production flexibility; 2) The tool holder fixing structure is stable and reliable, extending the service life of the cutting tool; 3) The drive unit operates smoothly and controllably, improving the stability of the cutting process; 4) The overall structural design has been optimized, resulting in better adaptability and safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the cutter of this utility model; Figure 3 This is an exploded structural diagram of the cutter of this utility model; Figure 4 This is a structural schematic diagram of the driving device and the limiting device of this utility model.

[0022] The annotations in the attached figures are explained as follows: 1. Frame; 11. Side plate; 2. Rotary shaft; 21. Square shaft; 22. Round shaft; 3. Cutting blade; 31. Blade holder; 311. Blade holder base; 3111. Square hole; 312. Blade holder cover; 313. Adjusting component; 3131. Handle; 314. Pressure plate; 315. Blade knob; 32. Blade; 4. Drive device; 41. Cylinder; 42. Connecting component; 43. Swing plate; 44. Cylinder tail shaft; 5. Limiting device; 51. Support plate; 52. Screw; 53. Handwheel. Detailed Implementation

[0023] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] It should be noted that, as shown in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements.

[0025] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] This utility model proposes a cutting blade assembly for a slitting machine. The cutting component of the slitting machine of this application will be described in detail below through the following embodiments.

[0029] Example 1: As Figure 1 As shown, in this embodiment, a cutting blade assembly of a slitting machine, The machine includes: a frame 1 with vertical side plates 11 on both sides; a rotating shaft 2, horizontally arranged, with both ends rotatably mounted on the side plates 11 on both sides of the frame 1; several cutters 3, arranged sequentially on the rotating shaft 2 along its length; and a drive device 4, mounted on one of the side plates 11, for driving the rotating shaft 2 to reciprocate; wherein the rotating shaft 2 includes: a square shaft 21 in the middle and round shafts 22 on both sides; and the cutters 3 include: a cutter holder 31 that slides along the length of the square shaft 21. The tool holder 31 is fitted onto the square shaft 21; the blade 32 is located at the front end of the tool holder 31; wherein the tool holder 31 includes: a tool holder seat 311, the bottom of which is provided with a square hole 3111 with an opening that can cooperate with the square shaft 21, so that the tool holder seat 311 can be fitted onto the square shaft 21 through the opening; a tool holder cover 312, which covers the opening of the tool holder seat 311; and an adjusting member 313, which is located on the tool holder cover 312 to adjust the tightness of the tool holder cover 312 covering the opening of the tool holder seat 311.

[0030] During assembly, the blade 32 is fixed to the front end of the blade holder 31, and the blade holder 31 is fitted onto the square shaft 21 through the opening of the blade holder seat 311. After adjusting the cutting position of the blade holder 31, the blade holder cover 312 is placed over the opening, and the adjusting component 313 is tightened to fix the blade holder 31 onto the square shaft 21. When the slitting machine is working, the drive device 4 drives the rotary shaft 2 to rotate, causing the cutter 3 to move downward to the cutting position to cut the material. When the slitting work is completed or when the cutter 3 needs maintenance or adjustment, the drive device 4 drives the rotary shaft 2 to rotate, causing the cutter 3 to lift upward and leave the cutting position, facilitating the user to adjust the position of the cutter 3 or replace the blade 32.

[0031] Example 2: This embodiment is a further improvement based on Embodiment 1.

[0032] like Figure 2 , 3 As shown, in this embodiment, the tool holder 31 further includes: a pressure plate 314, which is disposed at the front end of the tool holder 31 and cooperates with the tool holder base 311 to clamp the blade 32; and a blade knob 315, one end of which is provided with a bolt, which passes through the pressure plate 314 and is screwed onto the tool holder base 311. When assembling the blade 32, first unscrew the blade knob 315, remove the pressure plate 314, install the blade 32 in the set position at the front end of the tool holder base 311, cover the pressure plate 314, and tighten the blade knob 315. When disassembling the blade 32, first unscrew the blade knob 315, remove the pressure plate 314, remove the blade 32 from the tool holder base 311, cover the pressure plate 314, and tighten the blade knob 315.

[0033] Example 3: This embodiment is a further improvement based on Embodiment 2.

[0034] like Figure 2 , 3 As shown, in this embodiment, one end of the tool holder cover 312 is rotatably connected to the open end of the tool holder seat 311. The adjusting member 313 is an adjusting handle, with a handle 3131 at one end and a bolt at the other end, passing through the end of the tool holder cover 312 that is not connected to the tool holder seat 311, and screwed onto the tool holder seat 311. Rotating the handle 3131 can adjust the tightness of the tool holder 31 on the rotary shaft 2, allowing for easy disassembly and installation of the tool holder 31, or it can be loosened without disassembly, allowing the user to adjust the position of the tool holder 31 on the rotary shaft 2 without disassembling it. The handle 3131 provides a more comfortable grip shape, improving comfort, and the longer lever arm of the handle 3131 makes it easier for the user to adjust the tightness of the adjusting member 313.

[0035] Example 4: This embodiment is a further improvement based on Embodiment 2.

[0036] like Figure 2 , 3 As shown, in this embodiment, the adjusting component 313 is an adjusting knob, with a knob at one end and a bolt at the other end, passing through the end of the tool holder cover 312 that is not connected to the tool holder seat 311, and screwed onto the tool holder seat 311. Twisting the knob adjusts the tightness of the tool holder 31 on the rotary shaft 2, allowing for easy disassembly and installation of the tool holder 31, or it can be loosened without disassembly, enabling the user to adjust the position of the tool holder 31 on the rotary shaft 2 without disassembling it. The knob occupies little space and does not interfere with each other when rotated, making it more convenient for the user to adjust the tightness of the adjusting component 313.

[0037] Example 5: This embodiment is a further improvement based on Embodiment 1.

[0038] like Figure 4 As shown, in this embodiment, the driving device 4 includes: a cylinder 41; a connecting member 42 disposed at the top of the cylinder 41 push rod; a swing plate 43, one end of which is fixedly connected to one end of the rotary shaft 2, and the other end of which is rotatably connected to the connecting member 42; and a cylinder tail shaft 44 disposed at the tail of the cylinder 41, so that the tail of the cylinder 41 is rotatably connected to the side plate 11 on which the driving device 4 is mounted. When the driven cutter 3 enters the cutting position, the cylinder 41 push rod extends, pushing the end of the swing plate 43 connected to the cylinder 41 push rod upward, thereby causing the rotary shaft 2 to rotate downward and drive the head of the cutter 3 downward, entering the cutting position. When the driven cutter 3 exits the cutting position, the cylinder 41 push rod retracts, driving the end of the swing plate 43 connected to the cylinder 41 push rod downward, thereby causing the rotary shaft 2 to rotate upward and drive the head of the cutter 3 upward, leaving the cutting position.

[0039] Example 6: This embodiment is a further improvement based on embodiment four or five.

[0040] like Figure 4As shown, in this embodiment, a limiting device 5 is also included, which is disposed on the side plate 11 and located above the swing plate 43, for limiting the rotation angle of the swing plate 43. The limiting device 5 includes: a support plate 51, which is fixed on the side plate 11 and has a screw hole; and a screw 52, ​​which is screwed into the screw hole of the support plate 51. The lower end of the screw 52 is rounded, and a handwheel 53 is provided at the upper end of the screw 52. When the driving device 4 drives the rotating shaft 2 to rotate, the limiting device 5, through the rounded end of the lower end of the screw 52, ​​blocks the upward rotation of the swing plate 43, thereby limiting the rotation angle of the rotating shaft 2 and thus limiting the downward rotation angle of the cutter 3, preventing the cutter 3 from excessively rotating beyond its travel and affecting processing. The limiting range of the limiting device 5 can be adjusted by turning the screw 52, ​​and the handwheel 53 provided at the upper end of the screw 52 facilitates the adjustment of the limiting device 5 by the customer.

[0041] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A cutting blade assembly for a slitting machine, characterized in that, include: The frame (1) has vertical side plates (11) on both sides; The rotating shaft (2) is horizontally arranged and its two ends are rotatably mounted on the side plates (11) on both sides of the frame (1); A plurality of cutters (3) are arranged sequentially on the rotary shaft (2) along the length direction of the rotary shaft (2); A drive device (4) is disposed on one of the side plates (11) for driving the rotary shaft (2) to reciprocate; The rotary shaft (2) includes: a square shaft (21) in the middle and round shafts (22) on both sides; The cutter (3) includes: The tool holder (31) is slidably sleeved on the square shaft (21) along the length direction of the square shaft (21); A blade (32) is disposed at the front end of the tool holder (31); The tool holder (31) includes: The tool holder (311) has a square hole (3111) with an opening at its bottom that can cooperate with the square shaft (21), so that the tool holder (311) can be fitted onto the square shaft (21) through the opening. The tool holder cover (312) is fitted onto the opening of the tool holder seat (311); And an adjusting component (313) is provided on the tool holder cover (312) to adjust the tightness of the tool holder cover (312) covering the opening of the tool holder seat (311).

2. The cutting blade assembly of the slitting machine according to claim 1, characterized in that, The tool holder (31) also includes: A pressure plate (314) is disposed at the front end of the tool holder (31) and cooperates with the tool holder seat (311) to clamp the blade (32); And a blade knob (315), one end of which is provided with a bolt, which passes through the pressure plate (314) and is screwed onto the blade holder (311).

3. The cutting blade assembly of the slitting machine according to claim 1, characterized in that, One end of the tool holder cover (312) is rotatably connected to one end of the opening of the tool holder seat (311).

4. The cutting blade assembly of the slitting machine according to claim 3, characterized in that, The adjusting component (313) is an adjusting handle, with a handle (3131) at one end and a bolt at the other end, which passes through the end of the tool holder cover (312) that is not connected to the tool holder seat (311) and is screwed onto the tool holder seat (311).

5. The cutting blade assembly of the slitting machine according to claim 3, characterized in that, The adjusting component (313) is an adjusting knob, with a knob at one end and a bolt at the other end, passing through the end of the tool holder cover (312) that is not connected to the tool holder seat (311), and screwed onto the tool holder seat (311).

6. The cutting blade assembly of the slitting machine according to claim 1, characterized in that, The driving device (4) includes: Cylinder (41); A connecting member (42) is disposed at the top end of the cylinder (41) push rod; The swing plate (43) has one end fixedly connected to one end of the rotating shaft (2) and the other end rotatably connected to the connecting member (42); A cylinder tail shaft (44) is provided at the tail of the cylinder (41) so that the tail of the cylinder (41) is rotatably connected to the side plate (11) on which the drive device (4) is mounted.

7. The cutting blade assembly of the slitting machine according to claim 6, characterized in that, Also includes: A limiting device (5) is disposed on the side plate (11) and located above the swing plate (43) to limit the rotation angle of the swing plate (43).

8. The cutting blade assembly of the slitting machine according to claim 7, characterized in that, The limiting device (5) includes: A support plate (51) is fixed to the side plate (11) and has screw holes thereon; The screw (52) is screwed into the screw hole of the support plate (51).

9. The cutting blade assembly of the slitting machine according to claim 8, characterized in that, The lower end of the screw (52) is round.

10. The cutting blade assembly of the slitting machine according to claim 9, characterized in that, A handwheel (53) is provided at the upper end of the screw (52).

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