A material scrap edge discharging device

Abstract

This utility model relates to the technical field of material cutting, specifically disclosing a waste material discharge device. The waste material discharge device includes a waste material feed pipe, an air inlet pipe, an air outlet pipe, and a blowing device. The waste material feed pipe is open at both ends, with one end serving as the inlet for the waste material and the other end having a tapered outer surface. The air inlet pipe is fitted over the tapered end of the waste material feed pipe, forming an air guide channel with the tapered surface of the feed pipe and the inner wall of the air inlet pipe. An air inlet is provided on the side wall of the air inlet pipe, connecting to the blowing device and communicating with the air guide channel. The air outlet pipe is open at both ends, with one end connected to the air inlet pipe and having an outlet gap with the tapered end of the waste material feed pipe. The other end of the air outlet pipe is the outlet for the waste material. This utility model accelerates airflow by designing an annular air guide channel formed by the tapered surface of the waste material feed pipe and the inner wall of the air inlet pipe, preventing backflow and effectively reducing noise caused by eddies, thus achieving high-speed discharge of waste material.

Description

Technical Field

[0001] This utility model relates to the technical field of material cutting, and specifically discloses a material waste removal device. Background Technology

[0002] In roll-to-roll (RTL) production lines for printing, laminating, and coating, materials need to be slit according to order specifications after printing or lamination. The slitting process is typically completed by a bottom and top blade working together. While the material is being longitudinally cut at the blade edge, waste edges with a width of 5-30mm are generated. If these waste edges are not discharged in time, they will accumulate and entangle in the winding area, leading to film breaks, wrinkles, or even machine shutdowns, directly affecting production speed and finished product yield. Therefore, an efficient and stable waste edge discharge system is an indispensable component of the slitting unit.

[0003] To address this, existing technologies have proposed several devices for collecting slitting waste. For example, patent CN221621612U discloses a novel slitting waste recycling device, which features a pressurized and uniform airflow cannon after the suction port. This cannon uses a cavity with flared ends and a constricted middle section to pressurize and homogenize the airflow, improving suction capacity and preventing backflow. However, this structure has drawbacks due to the additional pressurized cavity, which has a large volume and requires a large volume of air to establish a stable negative pressure. This results in a long time required for the airflow to establish a stable negative pressure, leading to a delayed response. Furthermore, the cavity contains vortex zones, generating significant noise and negatively impacting the working environment for workers. Therefore, this solution aims to overcome these shortcomings by proposing a material waste discharge device. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a material waste discharge device.

[0005] This utility model discloses a material waste discharge device, which adopts the following technical solution:

[0006] A material waste discharge device includes a frame, the frame being equipped with a slitting bottom blade and a slitting blade corresponding to the slitting bottom blade. The slitting blade and the slitting bottom blade slit the material to remove waste edges. The material waste discharge device includes a waste edge feeding pipe, an air inlet pipe, an air outlet pipe, and a blowing device. The waste edge feeding pipe is open at both ends, with one end being the waste edge inlet and the outer surface of the other end being a tapered surface. The air inlet pipe is sleeved outside the tapered end of the waste edge feeding pipe, and the tapered surface of the waste edge feeding pipe and the inner wall of the air inlet pipe form an air guide channel. The side wall of the air inlet pipe is provided with an air inlet that is connected to the blowing device and communicates with the air guide channel. The air outlet pipe is open at both ends, with one end connected to the air inlet pipe and having an air outlet gap with the tapered end of the waste edge feeding pipe, and the other end of the air outlet pipe being the waste edge outlet.

[0007] Preferably, the conical surface of the air inlet pipe is directly opposite to that of the waste feed pipe, and the end of the waste feed pipe with the conical surface extends into the air outlet pipe.

[0008] Preferably, the inner edge of the waste edge inlet end of the waste edge feed pipe is provided with a guide arc surface.

[0009] Preferably, the frame is provided with a waste edge guide frame, and the waste edge guide frame is provided with a guide ring for the waste edge to pass through.

[0010] Preferably, the guide ring is movable within the waste edge guide frame.

[0011] Preferably, the waste edge guide frame is located below the slitting bottom knife, and guide rollers are respectively provided on both sides of the slitting bottom knife.

[0012] Preferably, the air inlet pipe is assembled with the blower via a connecting flexible air duct.

[0013] Preferably, the waste edge feed pipe is fixed to the frame.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] The waste material discharge device of this utility model accelerates the airflow by using the annular air guide channel formed by the conical surface and the inner wall of the air inlet pipe, reducing the cavity volume, instantly establishing negative pressure, and significantly shortening the response time, so as to achieve immediate use; the annular jet forms Venturi back pressure in the air outlet gap, which prevents backflow and effectively reduces the noise caused by eddy currents, thereby improving the working environment of the production workshop. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the material waste discharge device of this utility model;

[0017] Figure 2 for Figure 1 Another perspective illustration;

[0018] Figure 3 This is a partial cross-sectional view of the material waste discharge device of this utility model.

[0019] Explanation of icon numbers:

[0020] 1. Frame; 2. Slitting bottom knife; 3. Slitting knife; 4. Waste edge feed pipe; 41. Guide arc surface; 42. Conical surface; 5. Air inlet pipe; 6. Air outlet pipe; 7. Blowing equipment; 71. Flexible air duct; 8. Waste edge guide frame; 81. Guide ring; 9. Guide roller; 100. Printing material; 200. Waste edge. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] This embodiment discloses a material waste discharge device, referring to... Figure 1-3 The system includes a frame 1, which is equipped with a slitting bottom blade 2 and a slitting blade 3 corresponding to the slitting bottom blade 2. The slitting blade 3 and the slitting bottom blade 2 slit the printing material 100 to produce waste edges 200. As an improvement, the waste edge discharge device includes a waste edge feeding pipe 4, an air inlet pipe 5, an air outlet pipe 6, and a blowing device 7. The waste edge feeding pipe 4 is open at both ends, with one end being the inlet end of the waste edge and the outer surface of the other end being a conical surface 42. The air inlet pipe 5 is sleeved outside the end of the waste edge feeding pipe 4 with the conical surface 42. The conical surface 42 of the waste edge feeding pipe 4 and the inner wall of the air inlet pipe 5 form an annular air guide channel. The side wall of the air inlet pipe 5 is provided with an air inlet that is connected to the blowing device 7 and communicates with the air guide channel. The air outlet pipe 6 is open at both ends, with one end of the air outlet pipe 6 connected to the air inlet pipe 5 and leaving an air outlet gap with the end of the waste edge feeding pipe 4 with the conical surface 42. The other end of the air outlet pipe 6 is the outlet end of the waste edge.

[0023] The operating principle of the waste material discharge device in this solution is as follows: After the blower 7 is started, the high-speed airflow enters the air guide channel through the air inlet of the air inlet pipe 5. Since the conical surface 42 of the waste material feed pipe 4 is located at the junction of the air inlet, the airflow of the blower 7 is accelerated along the conical surface 42 to form a high-speed unidirectional flow. This creates a negative pressure at one end of the waste material feed pipe 4, and the waste material is instantly sucked in from the inlet end of the waste material feed pipe 4 and directly enters the air outlet pipe 6 with the airflow, and is finally discharged from the outlet end. Since this solution relies on the conical end of the waste material feed pipe 4 extending into the air outlet pipe 6 to form a local narrowing, generating Venturi back pressure, the waste material is directly sucked into the air outlet pipe from the waste material feed pipe 4. Backflow prevention can be achieved without a pressurization chamber, thus achieving backflow prevention with the smallest cavity volume. The airflow establishment time is extremely short, and the discharge noise caused by the eddy current problem is significantly improved. The waste material discharge device in this solution also solves the problems of slow response and high noise, achieving a discharge effect that is ready to use immediately and with low noise.

[0024] As a preferred embodiment, the air inlet of the air inlet pipe 5 is directly opposite the conical surface 42 of the waste feed pipe 4, and the end of the waste feed pipe 4 with the conical surface 42 extends into the air outlet pipe 6. The airflow is ejected directly onto the conical surface 42, forming an annular jet at the outer periphery of the end, which not only enhances low-pressure suction but also generates Venturi back pressure at the air outlet gap, preventing backflow of flue gas or debris, thereby achieving reliable backflow prevention without adding valves or pressurization chambers. Of course, in other embodiments, the air inlet of the air inlet pipe 5 can also be directly opposite the junction of the cylindrical surface and the conical surface 42 of the waste feed pipe 4, and the end of the waste feed pipe 4 with the conical surface 42 extends exactly to the edge where the air outlet pipe 6 meets the air inlet pipe 5. This can also achieve the waste 200 discharge effect, but the preferred embodiment is even more effective.

[0025] As a preferred option, the inner edge of the waste edge inlet end of the waste edge feed pipe 4 is provided with a guide arc surface 41. When the waste edge 200 passes through at high speed, it can slide along the guide arc surface 41, which significantly reduces the probability of wire snagging and tangling, reduces inlet blockage, and extends continuous operation time.

[0026] As a preferred embodiment, the frame 1 is equipped with a waste edge guide frame 8, which has several guide rings 81 for the waste edges 200 to pass through. The guide rings 81 can prevent multiple waste edges 200 from scattering and tangling in the air after wide-width slitting, ensuring that all waste edges 200 are concentrated and enter the waste edge inlet end of the waste edge feed pipe 4, avoiding leakage or material interruption.

[0027] As a preferred embodiment, the guide ring 81 can move axially within the waste edge guide frame 8, positioned by static friction or locked by a handle screw. The lateral relative position of the guide ring 81 can be quickly adjusted for different widths or cutting positions, maintaining a constant entry angle for the waste edge 200 and reducing edge wear.

[0028] As a preferred embodiment, the waste edge guide frame 8 is located directly below the slitting bottom knife 2, and guide rollers 9 are provided on both sides of the slitting bottom knife 2. The guide rollers 9 and the slitting bottom knife 2 form a double-sided clamping. When the waste edge 200 is cut, the printing material 100 is clamped and pulled down by the guide rollers 9. The active edge feeding is completed by the rotational power of the slitting bottom knife 2 itself, which further makes the waste material feeding smooth.

[0029] As a preferred option, the air inlet duct 5 can be connected to the blower 7 via a flexible air duct 71. The flexible air duct 71 can absorb equipment vibration and thermal expansion displacement, avoiding pipe opening cracking or sealing failure caused by rigid connection, and ensuring long-term stable negative pressure transmission.

[0030] As a preferred embodiment, the waste edge feeding pipe 4 is fixed to the frame 1, thereby assembling the material waste edge discharge device with the frame 1. Of course, in other embodiments, it can also be assembled by fixing the air inlet pipe 5 or the air outlet pipe 6 to the frame 1. However, by fixing the waste edge feeding pipe 4 to the frame 1, the waste edge can be better introduced, thus improving the problem of waste edge entanglement.

[0031] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A material waste removal device, comprising a frame, the frame being provided with a slitting bottom blade and a slitting blade corresponding to the slitting bottom blade, the slitting blade and the slitting bottom blade slitting the material to remove waste edges, characterized in that, The waste material discharge device includes a waste material feed pipe, an air inlet pipe, an air outlet pipe, and a blowing device. The waste material feed pipe is open at both ends, with one end being the inlet of the waste material and the outer surface of the other end being a conical surface. The air inlet pipe is sleeved on the conical end of the waste material feed pipe, and the conical surface of the waste material feed pipe and the inner wall of the air inlet pipe form an air guide channel. The side wall of the air inlet pipe is provided with an air inlet that is connected to the blowing device and communicates with the air guide channel. The air outlet pipe is open at both ends, with one end of the air outlet pipe connected to the air inlet pipe and leaving an air outlet gap with the conical end of the waste material feed pipe. The other end of the air outlet pipe is the outlet of the waste material.

2. The material waste discharge device according to claim 1, characterized in that, The conical surface of the air inlet pipe is directly opposite to that of the waste feed pipe, and the end of the waste feed pipe with the conical surface extends into the air outlet pipe.

3. The material waste discharge device according to claim 1, characterized in that, The waste edge feed pipe has a guide arc surface on the inner edge of the waste edge inlet end.

4. The material waste discharge device according to claim 1, characterized in that, The frame is equipped with a waste edge guide frame, and the waste edge guide frame is equipped with a guide ring for the waste edge to pass through.

5. The material waste discharge device according to claim 4, characterized in that, The guide ring is movable within the waste edge guide frame.

6. The material waste discharge device according to claim 4, characterized in that, The waste edge guide frame is located below the slitting bottom knife, and guide rollers are respectively provided on both sides of the slitting bottom knife.

7. The material waste discharge device according to claim 1, characterized in that, The air inlet pipe is assembled with the blower via a connecting flexible air duct.

8. The material waste discharge device according to claim 1, characterized in that, The waste feed pipe is fixed to the frame.

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