A device for slitting machine

Abstract

The application relates to the technical field of slitting machines, in particular to an edge suction device for a slitting machine, which comprises a blower, a vacuum generator, a gas supply channel, an exhaust channel and a vacuum channel, the gas supply channel, the exhaust channel and the vacuum channel are communicated with each other, the included angle between the exhaust channel and the gas supply channel is obtuse, a suction pipe is connected with the vacuum channel at one end and is provided with a suction port for sucking materials at the other end, a suction port support is arranged on the suction pipe at the one end of the suction port and is used for fixing the position of the suction port, an air outlet pipe is connected with the exhaust channel at one end and is provided with a discharge port for discharging materials at the other end, and an air inlet pipe is connected with the air outlet of the blower at one end and is connected with the gas supply channel at the other end. The suction force is stronger, the position of the suction port can be adjusted, different production requirements can be more flexibly adapted, the position of the blower can be adjusted, the vacuum generator is connected with the suction port through a pipeline, and the design and installation are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of slitting machine technology, and more specifically, to an edge suction device for a slitting machine. Background Technology

[0002] With the development of manufacturing, many basic materials (such as plastic film, paper, and metal foil) are typically produced in wide rolls to improve production efficiency. However, downstream applications (such as packaging, electronics, printing, and building materials industries) often require narrow-width materials. For example, the packaging industry needs to cut wide plastic film into packaging bag raw materials of different widths; the electronics industry needs to cut wide copper and aluminum foil into narrow electrode materials; and the printing industry needs to cut large rolls of paper into narrow rolls suitable for printing presses. This "wide in, narrow out" processing requirement directly drove the development of slitting devices. Early slitting equipment was mainly manual or semi-automatic, achieving slitting through simple cutters and mechanical transmission, but with extremely low precision and efficiency.

[0003] The vastly different physical properties (hardness, thickness, flexibility, surface tension, etc.) of various materials place specific demands on slitting devices, driving technological upgrades: Film materials (such as BOPP and PET films): Lightweight and easily stretched, slitting requires avoiding wrinkles and tears, demanding highly sharp blades and precise tension control; Metal foils (such as aluminum and copper foils): Low hardness and high ductility, easily producing burrs and debris during slitting, requiring specialized blades (such as circular blades and laser blades) and debris removal devices (such as edge suction devices); Paper: Highly brittle, slitting requires avoiding edge cracking, demanding strict matching of blade pressure and speed; Non-woven fabrics / textiles: Loose fibers, prone to fiber scattering during slitting, requiring dust removal and fixing devices. To adapt to different materials, slitting devices have continuously optimized blade types (from early flat blades to circular blades, laser blades, and ultrasonic blades), tension control systems (from mechanical tension to electronic tension), and feeding mechanisms (roller and belt types).

[0004] The increasing sophistication of industrial production has placed higher demands on the precision (such as slitting width error and edge flatness) and production efficiency (slitting speed) of slitting products. Precision requirements: In high-end fields such as electronics and photovoltaics, the material slitting width error needs to be controlled within ±0.1mm, which is difficult to meet with traditional mechanically guided slitting devices, thus driving the application of technologies such as servo motor drives and photoelectric correction. Efficiency requirements: As production line speeds increase (such as film production line speeds reaching over 1000 meters per minute), slitting devices need to be matched to high-speed operation. This requires upgrades to transmission systems (such as synchronous belts and precision gears) and tool cooling systems to avoid material damage caused by friction overheating.

[0005] A slitting machine is a device that cuts wide materials such as aluminum foil, non-woven fabric, paper, and film into multiple narrow strips. During the slitting process, edge scraps and debris are generated. If not handled promptly, these scraps and debris will affect the normal slitting process and product quality. For example, in aluminum foil slitting, if the aluminum foil edge scraps and aluminum powder generated during slitting are not removed in time, they will fall onto the aluminum foil surface, causing an uneven surface and affecting product quality. Early slitting machines used relatively simple methods to handle edge scraps, such as relying solely on negative pressure generated by fans and pipes to suck them away. However, this method could not keep up with the slitting speed of the main machine, resulting in unsatisfactory performance.

[0006] Different materials possess different properties, which has spurred the technological development of edge-collecting devices. For example, aluminum foil, with a thickness at the micrometer level, has a narrow waste edge width during slitting, typically around 20mm. This waste edge is easily broken by negative pressure, and the aluminum foil raw material may have damage, folds, or burrs on both sides. Therefore, the edge-collecting device needs to effectively absorb the waste edge without breaking it, while also ensuring the surface quality of the aluminum foil. On the other hand, while materials like non-woven fabrics have relatively greater thickness, the width of the edge material also needs to be controlled during slitting to improve material utilization. This necessitates an edge-collecting device capable of precisely absorbing the edge material.

[0007] As industries increasingly demand higher quality and production efficiency in slitting products, edge suction devices are constantly being improved. On one hand, the position and structure of these devices are being optimized. For example, placing the suction inlet closer to the cutting edge ensures that debris generated during material cutting is promptly sucked up, preventing it from falling onto the cutting roller and thus improving product quality. On the other hand, multi-functional edge suction devices have emerged, such as integrated blow-suction devices. These utilize compressed air to create a combined blow-suction system. By adjusting the relative position of the blow-suction nozzle and the fixed sleeve, the blow-suction force can be adjusted, enabling the handling of edge materials of different widths while simultaneously reducing energy consumption and increasing slitting efficiency.

[0008] Existing edge-suction devices have some problems during use, such as waste edge debris clogging the waste suction port and negative pressure breaking the waste edge. In order to solve these problems, technicians have been continuously conducting research and development and improvement. For example, some edge-suction devices add a clamping component, making the waste discharge roller active and the pressure roller passive, pressing the aluminum foil to suction the edge, establishing tension on the aluminum foil, ensuring the stability of the cutting edge, and making the waste edge of the aluminum foil less likely to be broken by negative pressure.

[0009] For example, the edge-blowing assembly for a slitting machine disclosed in Chinese Utility Model Patent Publication No. CN217967301U includes: an edge-blowing pipe, which is a hollow structure with an air inlet and an air outlet at its two ends; and an air conveyor connected to the air inlet of the edge-blowing pipe for conveying airflow into the edge-blowing pipe; wherein, the edge-blowing pipe has a feed inlet with an inclined baffle, one end of which is located on the side of the feed inlet near the air conveyor, and the other end extends downwards and away from the air conveyor. Its suction power is relatively weak, resulting in poor effectiveness in adsorbing edge material, and its limited range of action prevents flexible adjustment of the feed inlet position. Furthermore, the feed inlet design on the air inlet pipe necessitates its placement near the slitting mechanism, occupying a significant amount of space and posing challenges to the design and installation of the slitting machine. Utility Model Content

[0010] The main purpose of this invention is to propose a suction device for a slitting machine that has a large suction force, an adjustable suction port, and significantly reduces the difficulty of design and installation.

[0011] To solve the above-mentioned technical problems, this utility model proposes a suction device for a slitting machine, comprising: a blower; a vacuum generator having an air supply channel, an exhaust channel, and a vacuum channel, wherein the air supply channel, the exhaust channel, and the vacuum channel are interconnected, and the angle between the exhaust channel and the air supply channel is an obtuse angle; a suction pipe having one end connected to the vacuum channel and the other end having a suction port for suction; a suction port bracket being disposed on one end of the suction port on the suction pipe for fixing the position of the suction port; an air outlet pipe having one end connected to the exhaust channel and the other end having a discharge port for discharge; and an air inlet pipe having one end connected to the air outlet of the blower and the other end connected to the air supply channel.

[0012] In the above technical solution, the vacuum generator further includes: an outer tube of the generator, one end of which is provided with a connection opening with a radius smaller than the maximum radius of the outer tube of the generator; an air inlet pipe of the generator, one end of which is disposed on the circumferential surface of the outer tube of the generator and connected to the outer tube of the generator; and an inner tube of the generator, one end of which extends into the outer tube of the generator from the connection opening and exceeds the position where the air inlet pipe of the generator is connected to the outer tube of the generator.

[0013] In the above technical solution, further, starting from the end where the generator inner tube extends into the generator, there is a slope away from the connection opening, so that the radius of the generator outer tube away from the connection opening becomes smaller.

[0014] In the above technical solution, the suction port support further includes: left and right guide rails; front and rear guide rails, which are disposed at both ends of the left and right guide rails and are slidably connected to the left and right guide rails so that the left and right guide rails can move back and forth along the front and rear guide rails; and a suction pipe fixer, which is slidably disposed on the left and right guide rails and can move left and right along the left and right guide rails to fix the suction pipe on the suction port support.

[0015] In the above technical solution, furthermore, tensioning devices are provided between the front and rear guide rails, the left and right guide rails, and the left and right guide rails and the suction pipe holder, for switching the suction port to a movable or fixed state.

[0016] In the above technical solution, the tightening device is a bolt that passes through the front and rear guide rails or the left and right guide rails or the suction pipe fixing device.

[0017] In the above technical solution, there are two suction pipes, which are connected to the vacuum channel through a T-junction.

[0018] In the above technical solution, the suction pipe and one end of the vacuum channel, as well as the air outlet and air inlet of the blower, are connected by a plastic hose.

[0019] In the above technical solution, the suction pipe and one end of the vacuum channel, as well as the air outlet and air inlet of the blower, are connected through a gooseneck pipe.

[0020] In the above technical solution, the suction port is further described as a flat port.

[0021] Beneficial effects: Compared with existing technologies, the suction is stronger, the position of the suction port is adjustable, and it can more flexibly adapt to different production needs. The position of the blower is adjustable, and the vacuum generator is connected to the suction port through a pipeline, which facilitates design and installation. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model without the connecting pipe installed; Figure 2 This is a schematic diagram of the pipe connection structure of this utility model; Figure 3 This is a cross-sectional structural diagram of the vacuum generator of this utility model.

[0024] The annotations in the attached figures are explained as follows: 1. Blower; 2. Vacuum generator; 21. Generator outer pipe; 22. Generator ventilation pipe; 23. Generator inner pipe; 24. Air supply channel; 25. Exhaust channel; 26. Vacuum channel; 3. Suction pipe; 4. Suction port bracket; 41. Left and right guide rails; 42. Front and rear guide rails; 43. Suction pipe retainer; 5. Air outlet pipe; 6. Air inlet pipe; 7. T-junction. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] This utility model proposes an edge suction device for a slitting machine.

[0031] The edge suction device for a slitting machine of this application will be described in detail below through the following embodiments.

[0032] Example 1: like Figure 1 As shown in this embodiment, a suction device for a slitting machine is characterized by comprising: a blower 1; a vacuum generator 2, which is provided with an air supply channel 24, an exhaust channel 25, and a vacuum channel 26, wherein the air supply channel 24, the exhaust channel 25, and the vacuum channel 26 are interconnected, and the angle between the exhaust channel 25 and the air supply channel 24 is an obtuse angle; a suction pipe 3, one end of which is connected to the vacuum channel 26, and the other end of which is provided with a suction port for suction; a suction port bracket 4, which is provided on the suction pipe 3 at one end of the suction port for fixing the position of the suction port; an air outlet pipe 5, one end of which is connected to the exhaust channel 25, and the other end of which is provided with a discharge port for discharge; and an air inlet pipe 6, one end of which is connected to the air outlet of the blower 1, and the other end of which is connected to the air supply channel 24.

[0033] The blower 1 delivers airflow to the inlet pipe 6. After entering the vacuum generator 2, the airflow is discharged to the outlet pipe 5. In the vacuum generator 2, the airflow flows from the supply channel 24 to the exhaust channel 25. Using Bernoulli's principle, a negative pressure is formed in the vacuum channel 26, thereby generating suction at the suction port. The angle between the exhaust channel 25 and the supply channel 24 is an obtuse angle, which ensures that the airflow in the supply channel 24 enters the exhaust channel 25 stably without entering the vacuum channel 26, thus stably achieving the effect of continuously generating negative pressure in the vacuum channel 26.

[0034] Example 2: This embodiment is a further improvement based on Embodiment 1.

[0035] like Figure 3As shown, in this embodiment, the vacuum generator 2 includes: a generator outer tube 21, one end of which is provided with a connection opening with a radius smaller than the maximum radius of the generator outer tube 21; a generator air inlet pipe 6, one end of which is disposed on the circumferential surface of the generator outer tube 21 and connected to the generator outer tube 21; and a generator inner tube 23, one end of which extends into the generator outer tube 21 from the connection opening and exceeds the position where the generator air inlet pipe 6 is connected to the generator outer tube 21.

[0036] Starting from the end of the generator outer tube 21 that corresponds to the end of the generator inner tube 23 that extends into, there is a slope in the direction away from the connection opening, which makes the radius of the end of the generator outer tube 21 away from the connection opening smaller.

[0037] The inner tube 23 of the generator extends into the outer tube 21 of the generator and forms a cavity with the inner wall of the outer tube 21. When the airflow in the vacuum generator 2 flows in reverse, it will enter this cavity and be blocked and flow back into the normal air duct. The radius of the sloping part of the outer tube 21 of the generator is reduced, and its internal space is reduced, which further increases the airflow speed. By utilizing Bernoulli's principle (the faster the airflow speed, the lower the pressure), the air pressure between the outer tube 21 of the generator and the inner tube 23 of the generator is further reduced, thereby increasing the suction force of the vacuum channel 26 connected to it.

[0038] Example 3: This embodiment is a further improvement based on any of the above embodiments.

[0039] like Figure 1 As shown, in this embodiment, the suction port bracket 4 includes: left and right guide rails 41; front and rear guide rails 42, which are disposed at both ends of the left and right guide rails 41 and are slidably connected to the left and right guide rails 41, so that the left and right guide rails 41 can move back and forth along the front and rear guide rails 42; and a suction pipe 3 fixer, which is slidably disposed on the left and right guide rails 41 and can move left and right along the left and right guide rails 41, for fixing the suction pipe 3 to the suction port bracket 4.

[0040] The front and rear guide rails 42, the left and right guide rails 41, and the left and right guide rails 41 and the suction pipe 3 are all equipped with a tensioning device to switch the suction port to a movable or fixed state.

[0041] The left and right guide rails 41 move back and forth along the front and rear guide rails 42 to adjust the front and rear position of the suction port. The suction pipe 3 fixture moves left and right along the left and right guide rails 41 to adjust the left and right position of the suction port. This allows the suction device to adapt to various production needs and flexibly adjust its position to adapt to changes in material width and product radius. After adjusting the position, a tightening device is used to lock and fix the position of the suction port to prevent it from moving.

[0042] Example 4: This embodiment is a further improvement based on any of the above embodiments.

[0043] like Figure 1 As shown, in this embodiment, the tightening device is a bolt that passes through the front and rear guide rails 42, the left and right guide rails 41, or the suction pipe 3 fixing device.

[0044] Example 5: This embodiment is a further improvement based on any of the above embodiments.

[0045] like Figure 1 As shown, in this embodiment, there are two suction pipes 3, which are connected to the vacuum channel 26 through a three-way connector 7, and can simultaneously adsorb and treat the waste burrs generated on both sides of the material.

[0046] Example 6: This embodiment is a further improvement based on any of the above embodiments.

[0047] like Figure 2 As shown, in this embodiment, the suction pipe 3 is connected to one end of the vacuum channel 26 and the air outlet and air inlet pipe 6 of the blower 1 through a rubber hose, which can accommodate the function of adjusting the position of the suction port and improve the overall flexibility of the equipment.

[0048] Example 7: This embodiment is a further improvement based on any of the above embodiments.

[0049] like Figure 2 As shown, in this embodiment, the suction pipe 3 and one end of the vacuum channel 26, as well as the air outlet and air inlet pipe 6 of the blower 1, are connected by a gooseneck tube. Compared with rubber hoses, the gooseneck tube has a stronger ability to resist external impacts and sharp object damage, and can effectively avoid the situation where the equipment efficiency decreases or even fails due to accidental physical damage to the hose during the production process.

[0050] Example 8: This embodiment is a further improvement based on any of the above embodiments.

[0051] like Figure 2 As shown in this embodiment, the suction port is a flat port with a small area, resulting in greater suction force. Furthermore, its shape is more in line with the shape of the waste material flash, thus avoiding waste of suction force and improving the energy efficiency ratio.

[0052] 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. An edge-suction device for a slitting machine, characterized in that, include: Blower (1); A vacuum generator (2) is provided with a gas supply channel (24), an exhaust channel (25) and a vacuum channel (26), wherein the gas supply channel (24), the exhaust channel (25) and the vacuum channel (26) are interconnected, wherein the angle between the exhaust channel (25) and the gas supply channel (24) is an obtuse angle; The suction pipe (3) is connected at one end to the vacuum channel (26) and at the other end to a suction port for suction. A suction port bracket (4) is set on one end of the suction port on the suction pipe (3) to fix the position of the suction port; The air outlet pipe (5) is connected at one end to the exhaust channel (25) and at the other end to a discharge port for discharging materials; The air inlet pipe (6) is connected at one end to the air outlet of the blower (1) and at the other end to the air supply channel (24).

2. The edge suction device for a slitting machine according to claim 1, characterized in that, The vacuum generator (2) includes: The generator outer tube (21) has a connection opening at one end with a radius smaller than the maximum radius of the generator outer tube (21); The generator air inlet pipe (6) has one end located on the circumferential surface of the generator outer pipe (21) and is connected to the generator outer pipe (21); The inner tube (23) of the generator extends from the connection opening into the outer tube (21) of the generator, and extends beyond the position where the air inlet pipe (6) of the generator is connected to the outer tube (21) of the generator.

3. The edge suction device for a slitting machine according to claim 2, characterized in that, The outer tube (21) of the generator starts from the end of the inner tube (23) of the generator that extends into it, and slopes away from the connection opening, so that the radius of the outer tube (21) of the generator away from the connection opening becomes smaller.

4. The edge suction device for a slitting machine according to claim 1, characterized in that, The suction port bracket (4) includes: Left and right guide rails (41); Front and rear guide rails (42) are disposed at both ends of the left and right guide rails (41) and are slidably connected to the left and right guide rails (41) so that the left and right guide rails (41) can move back and forth along the front and rear guide rails (42); The suction tube (3) holder is slidably mounted on the left and right guide rails (41) and can move left and right along the left and right guide rails (41) to fix the suction tube (3) on the suction port bracket (4).

5. The edge suction device for a slitting machine according to claim 4, characterized in that, The front and rear guide rails (42) and the left and right guide rails (41), as well as the left and right guide rails (41) and the suction pipe (3) fixing device are all provided with a tensioning device for switching the suction port to a movable or fixed state.

6. The edge suction device for a slitting machine according to claim 5, characterized in that, The tightening device is a bolt that passes through the fixing device of the front and rear guide rails (42), the left and right guide rails (41), or the suction pipe (3).

7. The edge suction device for a slitting machine according to claim 1, characterized in that, There are two suction tubes (3), which are connected to the vacuum channel (26) through a tee (7).

8. The edge-suction device for a slitting machine according to any one of claims 1-7, characterized in that, The suction pipe (3) is connected to one end of the vacuum channel (26) and the air outlet of the blower (1) and the air inlet pipe (6) through a plastic hose.

9. The edge-suction device for a slitting machine according to any one of claims 1-7, characterized in that, The suction pipe (3) and one end of the vacuum channel (26) and the air outlet of the blower (1) are connected to the air inlet pipe (6) through a gooseneck pipe.

10. The edge-suction device for a slitting machine according to claim 1, characterized in that, The suction port is a flat opening.

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