A cutting knife assembly of a PET protective film slitting machine

Abstract

The utility model discloses a kind of cutter assemblies of PET protective film slitting machine, including fixed seat, high-frequency drive assembly and tool. The high-frequency drive assembly is fixedly installed on the surface of fixed seat, tool both ends are connected with fixed seat by elastic connecting piece, electric heater is embedded in tool interior, for maintaining cutting edge constant temperature in cutting process, avoid PET protective film melt and burr. High-frequency drive assembly includes drive seat, excitation body and swing head piece, swing head piece is rotatably connected with drive seat by shaft stem, and is movably connected with tool surface, its surface is equipped with permanent magnet, under the action of excitation body alternating magnetic field, tool high-frequency vibration is driven, realizes high-frequency cutting. Drive seat bottom is equipped with guide sliding head, and the sliding abutment of guide sliding groove on tool surface, for ensuring the guidance stability in high-frequency cutting process;Spring is equipped on both sides of swing head piece, realizes automatic reset in cutting movement.

Description

Technical Field

[0001] This utility model relates to the field of film cutting technology, specifically a cutting component for a PET protective film slitting machine. Background Technology

[0002] Currently, mechanical cutters are commonly used for slitting PET protective films. Traditional cutter assemblies mostly use motors to drive the blades for linear or reciprocating cutting. Their structure is relatively simple and the cost is low, so they are widely used in actual production.

[0003] However, existing technologies still have the following shortcomings: First, traditional cutters are mostly used for room temperature cutting. When cutting PET protective film for a long time, the blades are prone to friction and heat, causing the protective film to melt and stick together, resulting in defects such as burrs, streaks, or fusion at the cut. This not only affects the cutting accuracy and cut smoothness, but also reduces the appearance quality and stability of the finished product.

[0004] Secondly, in existing high-frequency driven cutting tool solutions, most structures rely directly on motors or mechanical linkages to drive tool vibration, making it difficult to guarantee the stability of high-frequency vibration. Because the vibration frequency and amplitude are difficult to control precisely, the tool is prone to deviation or excessive vibration during cutting, resulting in uneven cuts and even shortening tool life.

[0005] In summary, existing PET protective film slitting machine cutting assemblies generally suffer from defects such as burr adhesion during the cutting process, unstable vibration drive, and insufficient cutting accuracy. There is an urgent need for a new type of cutting assembly with a reasonable structure, high cutting stability, and the ability to improve cutting quality. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a cutting assembly for a PET protective film slitting machine, including a fixed base, a high-frequency drive assembly, and a cutting tool. The high-frequency drive assembly is fixedly installed on the surface of the fixed base, and both ends of the cutting tool are connected to the fixed base through elastic connectors. An electric heater is embedded inside the cutting tool to maintain a constant temperature of the blade. The high-frequency drive assembly consists of a drive base, an exciter, and a swing head component. The swing head component is rotatably engaged with the drive base through a shaft and is connected to the cutting tool. Under the action of the alternating magnetic field of the exciter, the cutting tool is driven to swing at high frequency, thereby realizing high-frequency vibration cutting of the PET protective film.

[0008] In a preferred embodiment, an electric heater is further embedded inside the blade to maintain a constant temperature during cutting. Specifically, this structure effectively prevents the PET protective film from melting and sticking due to frictional heat, thereby improving the smoothness and finish of the cut.

[0009] In a preferred embodiment, the high-frequency drive assembly includes a drive base, an exciter, and a sway head. The sway head is rotatably sleeved on a shaft inside the drive base, with one end movably connected to the cutting tool. Under the action of the alternating magnetic field of the exciter, high-frequency oscillation is achieved through the permanent magnet on the sway head. Specifically, this scheme can drive the cutting tool to reciprocate at high frequency, thereby improving cutting efficiency and cutting quality.

[0010] In a preferred embodiment, the bottom surface of the drive seat is provided with a guide slide head, and the surface of the cutter is provided with a guide slide groove. The end of the guide slide head slides against the guide slide groove. Specifically, this structure can ensure that the cutter maintains stable guidance during high-frequency vibration and avoids uneven cutting due to deviation.

[0011] In a preferred embodiment, the guide head is further configured as an elastic material component, symmetrically arranged on both sides of the tool. Specifically, this solution can achieve tool clamping and guidance, enhance the stability of the high-frequency cutting process, and reduce errors caused by vibration.

[0012] In a preferred embodiment, the swing head is further configured such that springs are provided on both sides of the swing head and are movably connected to the inner side of the drive seat. Specifically, this structure can push the swing head to return to its original position quickly after the magnetic field of the exciter disappears, thereby ensuring that the tool is reset in time and avoiding cutting delay.

[0013] In a preferred embodiment, the elastic connector is further configured to employ a spring steel sheet structure, which specifically provides buffering during high-frequency oscillating cutting, reduces vibration amplitude, and improves the smoothness of the cutting process and the uniformity of the cut.

[0014] In a preferred embodiment, the drive base is further configured to adopt an integrated metal frame structure. Specifically, this design can improve the overall strength, ensure the fixation of the exciter and the stable movement of the swing head, and enhance the durability and reliability of the device.

[0015] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by embedding and installing an electric heater inside the blade, the blade can be heated at a constant temperature during the cutting process, avoiding problems such as melting and sticking of the PET protective film and burrs during the cutting process, thereby effectively improving the cutting accuracy and cut quality and ensuring product consistency.

[0016] 2. In this utility model, a high-frequency drive structure is adopted in which the exciter and the permanent magnet on the swing head cooperate with each other, so that the cutter can realize high-frequency reciprocating vibration cutting under the traction of the high-frequency magnetic field. Combined with the buffering and guiding effect of the elastic connector and the guide head, not only is the cutting efficiency improved, but the vibration and deviation of the cutter during the cutting process are also significantly reduced, ensuring the stability of cutting and the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of a high-frequency drive assembly and tool mounting structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of a high-frequency drive assembly and a cutting tool according to an embodiment of the present invention; Figure 4 This is an exploded view of the high-frequency drive component according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the exciter and swing head structure according to one embodiment of the present invention.

[0018] Figure label: 100. Fixture; 200. High-frequency drive assembly; 210. Drive base; 220. Exciter; 230. Swing head component; 211. Shaft; 212. Guide slide; 231. Spring; 232. Permanent magnet; 300. Cutting tool; 310. Elastic connector; 320. Guide groove; 330. Electric heater. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0020] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0021] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, including a cutting assembly for a PET protective film slitting machine.

[0022] Combination Figure 1 - Figure 5 As shown, the present invention provides a cutting assembly for a PET protective film slitting machine, comprising: a fixed base 100, a high-frequency drive assembly 200, and a cutting tool 300.

[0023] The high-frequency drive assembly 200 is fixedly installed on the surface of the fixed base 100; both ends of the cutter 300 are provided with elastic connectors 310 that are connected to the surface of the fixed base 100. The elastic connectors 310 can provide a buffering effect when the cutter 300 deflects, ensuring the stability of the cutting process.

[0024] An electric heater 330 is embedded in the inner side of the cutting tool 300 to electrically heat the cutting tool 300, so that the cutting tool 300 maintains a suitable temperature during the cutting process and reduces the phenomenon of cutting and sticking.

[0025] The high-frequency drive assembly 200 includes a drive base 210, an exciter 220, and a swivel head component 230 movably mounted inside the drive base 210. A guide slide head 212 is fixedly mounted on the bottom surface of the drive base 210, and a guide slide groove 320 is formed on the surface of the cutter 300. The end of the guide slide head 212 slides against the surface of the guide slide groove 320, thereby ensuring that the cutter 300 maintains stable guidance during high-frequency reciprocating vibration cutting.

[0026] The drive seat 210 has a shaft 211 on its inner side. The swing head 230 is rotatably sleeved on the surface of the shaft 211, and one end of the swing head 230 is movably connected to the surface of the tool 300 to achieve synchronous cutting under high-frequency drive.

[0027] In a preferred embodiment, the guide head 212 is made of an elastic material and is symmetrically arranged on both sides of the cutter 300 for clamping and abutting against the surface of the cutter 300. This structure can improve guiding accuracy, prevent the cutter 300 from shifting laterally due to high-frequency vibration, and enhance the stability and accuracy of cutting.

[0028] In another preferred embodiment, springs 231 are provided on both sides of the oscillating head component 230, and the oscillating head component 230 is movably connected to the inner side of the drive seat 210 through the springs 231. This structure can automatically reset the oscillating head component 230 by using the rebound force of the springs 231 when the magnetic field generated by the exciter 220 disappears or weakens, ensuring that the cutter 300 can always return to the initial position and improving the reliability of the system.

[0029] In a further embodiment, a permanent magnet 232 is embedded in the surface of the oscillating head component 230, and the permanent magnet 232 is arranged opposite to the surface of the exciter 220. Under the action of the alternating magnetic field of the exciter 220, the permanent magnet 232 responds accordingly, driving the oscillating head component 230 to oscillate at high frequency, thereby driving the cutter 300 to achieve high-frequency reciprocating cutting motion, improving cutting efficiency and cut quality.

[0030] Preferably, the electric heater 330 adopts an embedded structure and is directly disposed inside the body of the cutter 300. This structure enables rapid heating and uniform heating, ensuring a constant blade temperature and effectively avoiding burrs and melting / sticking phenomena when cutting PET protective film.

[0031] Furthermore, the elastic connector 310 is preferably a spring steel sheet structure, which can provide good buffering performance when the tool 300 deflects at high frequency, reduce the vibration amplitude of the tool 300 during the cutting process, thereby improving the stability of cutting and the uniformity of the cutting line.

[0032] In another preferred embodiment, the drive seat 210 adopts an integrated metal frame structure with high overall strength, which can effectively fix the exciter 220 and provide reliable support for the high-frequency reciprocating motion of the swing head 230, thereby ensuring the long-term stable operation of the cutter assembly.

[0033] Working principle and usage process of this utility model: When the equipment is running, the exciter 220 generates an alternating magnetic field around itself after being energized. This magnetic field acts on the permanent magnet 232 on the surface of the oscillating head component 230, thereby driving the oscillating head component 230 to generate high-frequency reciprocating oscillation on the shaft 211. One end of the oscillating head component 230 is movably connected to the cutter 300, so the cutter 300 can achieve high-frequency vibration cutting as the oscillating head component 230 moves.

[0034] Elastic connectors 310 are provided on both sides of the cutting tool 300 to buffer and dampen the deflection of the tool during cutting, thereby ensuring the smoothness of the cutting process and avoiding uneven cuts caused by excessive vibration. An electric heater 330 is embedded inside the cutting tool 300 body to electrically heat the cutting edge during operation, keeping the cutting edge at a constant temperature, thereby effectively reducing material adhesion and burr phenomena during cutting and improving cut quality.

[0035] To ensure guiding accuracy during the cutting process, a guide head 212 is provided on the bottom surface of the drive base 210. Its end slides against the guide groove 320 on the surface of the tool 300, ensuring that the tool 300 always moves along the predetermined trajectory during high-frequency vibration cutting and avoiding deviation. The guide head 212 is made of elastic material and is symmetrically arranged on both sides of the tool, and can clamp and abut against the tool surface to further improve the stability of the guide.

[0036] In addition, springs 231 are provided on both sides of the oscillating head component 230. When the alternating magnetic field of the exciter 220 disappears or weakens, the springs 231 can push the oscillating head component 230 to quickly reset, thereby ensuring that the tool 300 returns to its initial position. The drive base 210 adopts an integrated metal frame structure, which not only effectively fixes the exciter 220, but also provides stable support for the reciprocating motion of the oscillating head component 230.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cutting blade assembly for a PET protective film slitting machine, characterized in that, include: The device comprises a fixed base (100), a high-frequency drive assembly (200), and a cutting tool (300). The high-frequency drive assembly (200) is fixedly mounted on the surface of the fixed base (100). Both ends of the cutting tool (300) are provided with elastic connectors (310) that connect to the surface of the fixed base (100). An electric heater (330) is embedded in the inner side of the cutting tool (300) for electrically heating the cutting tool (300). The high-frequency drive assembly (200) includes a drive base (210), an exciter (220), and a movable mounting. The swing head component (230) is located inside the drive seat (210). A guide slide head (212) is fixedly installed on the bottom surface of the drive seat (210). A guide slide groove (320) is opened on the surface of the cutter (300). The end of the guide slide head (212) slides against the surface of the guide slide groove (320). A shaft (211) is provided inside the drive seat (210). The swing head component (230) is rotatably sleeved on the surface of the shaft (211). One end of the swing head component (230) is movably connected to the surface of the cutter (300).

2. The cutting assembly of the PET protective film slitting machine according to claim 1, characterized in that, The guide head (212) is an elastic material component, symmetrically arranged on both sides of the cutter (300), and is used to clamp and abut against the surface of the cutter (300).

3. The cutting assembly of the PET protective film slitting machine according to claim 1, characterized in that, The swing head component (230) is provided with springs (231) on both sides, and is movably connected to the inner side of the drive seat (210) through the springs (231).

4. The cutting assembly of the PET protective film slitting machine according to claim 1, characterized in that, A permanent magnet (232) is embedded in the surface of the swing head component (230), and the permanent magnet (232) is arranged relative to the surface of the exciter (220).

5. The cutting assembly of the PET protective film slitting machine according to claim 1, characterized in that, The electric heater (330) has an embedded structure and is located inside the body of the cutter (300).

6. The cutting assembly of the PET protective film slitting machine according to claim 1, characterized in that, The elastic connector (310) is a spring steel sheet structure.

7. The cutting assembly of the PET protective film slitting machine according to claim 1, characterized in that, The drive seat (210) is an integrated metal frame structure used to fix the exciter (220) and support the reciprocating motion of the swing head (230).

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