Automatic cutting device for rust-proof plastic cap bag and using method of automatic cutting device

Abstract

The invention provides an automatic cutting device for rust-proof plastic bags and a using method thereof.The automatic cutting device comprises a raw material frame fixed to a bottom plate, a plurality of rollers arranged in the vertical direction are placed on the raw material frame, plastic films of different specifications are wound around the surfaces of the rollers respectively, and a feeding assembly is fixed to the front sides of the rollers; the clamping device is used for clamping the plastic film and sending out the plastic film forwards. A traction mechanism is further arranged on the front side of the raw material frame and provided with a transverse rod, a plurality of pneumatic clamping jaws are installed on the transverse rod and used for clamping the plastic film, and the raw material frame drags the plastic film forwards along the rail. In the process, the required length of the plastic film is obtained by controlling the rotating angle of the servo motor of the roller, and finally the plastic film is cut off through the cutting unit. According to the automatic cutting device, the required rust-proof bags can be selected according to the specifications of the steel coils, measurement and cutting can be automatically conducted, manual participation is not needed in the whole process, the working efficiency of rust-proof bagging of a production line can be improved, and the safety risk is reduced.

Description

Technical Field

[0001] This invention relates to the field of automatic cutting technology, and in particular to an automatic cutting device for rust-proof plastic bags and its usage method. Background Technology

[0002] Currently, cold rolling packaging operations in China are mostly semi-automatic packaging production lines, and some operations still require manual intervention. As users have increasingly higher requirements for packaging quality, the packaging business needs to be optimized and improved to achieve the best possible product quality.

[0003] A crucial aspect of manual packaging is rust-proof bagging, which protects the product from rust and corrosion. Currently, rust-proof bagging on the cold-rolled packaging production line is entirely done by employees, from reading packaging specifications and dimensions to material cutting. However, the following issues exist:

[0004] 1. The specifications of steel coil packaging are read manually. Each time, the steel coil can only be checked and recorded manually after it is transported to the designated work station. This method of recording one coil at a time makes it impossible to prepare materials in advance, resulting in low efficiency.

[0005] 2. After obtaining the packaging information, employees go to the bag rack and select the type and size of plastic bags according to the requirements for cutting. This process involves employees making multiple trips, which is time-consuming, labor-intensive, and inefficient.

[0006] 3. Manual cutting has significant limitations. First, inaccurate cutting precision leads to material waste, requiring two people to pull and cut. When manpower is limited, usually only one person can pull and cut, further reducing accuracy. Second, the cutting process usually requires placing the material on the ground to check the marked dimensions. Over the years and due to environmental factors, the markings have become blurred and inaccurate, requiring multiple confirmations. Third, the use of utility knives for cutting poses a risk of cuts.

[0007] Therefore, it is necessary to develop an automatic cutting auxiliary device to improve work efficiency and reduce safety risks in the rust-proof bagging work of the cold rolling packaging production line. Summary of the Invention

[0008] In view of the shortcomings of the prior art described above, the present invention provides an automatic cutting device for rust-proof plastic bags, including a base plate, a raw material rack vertically fixed on the base plate, the raw material rack including two opposing side plates, the rear edge of the side plates having multiple slots for placing multiple rollers arranged in a vertical direction, the surfaces of the multiple rollers being wrapped with plastic films of different specifications; a feeding assembly is fixed to the front side of each roller, the feeding assembly including an upper roller and a lower roller, the upper roller and the lower roller clamping the plastic film and feeding it forward;

[0009] The front side of the raw material rack is also equipped with a traction mechanism. The traction mechanism has a crossbar on the side near the raw material rack. The crossbar is equipped with multiple pneumatic grippers for clamping the plastic film. The crossbar can move up and down in the vertical direction to reach the desired position of the plastic film.

[0010] Optionally, the assembly also includes a cutting unit located in front of the feeding assembly. The cutting unit includes a blade and a transverse drive belt, with the blade and drive belt fixedly connected.

[0011] Optionally, it also includes a steel coil information processing unit, which is connected to the production line system and can obtain information on the steel coils to be bagged on the current production line, thereby determining the required plastic film model.

[0012] Optionally, it also includes a control unit, which is communicatively connected to the feeding assembly, the traction mechanism, the cutting unit, and the steel coil information processing unit.

[0013] Optionally, the traction mechanism includes a vertically arranged portal frame, the bottom end of which is connected to a track located on the base plate and can move back and forth along the track to clamp the plastic film and then drag the plastic film forward.

[0014] Optionally, the traction mechanism further includes a transmission belt arranged in a vertical direction, with the end of the crossbar fixedly connected to the transmission belt, and the crossbar moving up and down is realized by the operation of the belt.

[0015] Optionally, it also includes a laser ranging unit, which is installed on the front side of the material rack near the traction mechanism and is used to measure the distance between the material rack and the traction mechanism.

[0016] Optionally, the roller surface of the feeding assembly and the pneumatic gripper surface of the traction mechanism are both covered with an adhesive layer.

[0017] Optionally, the gripping fingers of the pneumatic gripper are flat gripping fingers.

[0018] The present invention also provides a method for using the aforementioned automatic cutting device for rust-proof plastic bags, comprising the following steps:

[0019] S1: The steel coil is moved to the unit station. The steel coil information processing unit obtains the information of the steel coil to be bagged through the production line system and determines the required plastic film type.

[0020] S2: The control unit controls the crossbar of the traction mechanism to move to the height of the roller where the corresponding plastic film is located, based on the required plastic film model fed back by the steel coil information processing unit.

[0021] S3: The pneumatic gripper of the traction mechanism clamps the end of the plastic film and drags it forward. At the same time, the roller of the feeding component runs to feed the plastic film out. During the process, the control unit controls the angle through which the servo motors of the upper and lower rollers rotate to obtain the required length of the plastic film, which is then cut by the cutting unit.

[0022] S4: The cut plastic film is manually wrapped onto the steel coil, and then the automatic cutting device performs the next cutting operation.

[0023] As described above, this invention provides an automatic cutting device for rust-proof plastic bags and its usage method. The automatic cutting device includes a raw material rack fixed to a base plate, on which multiple rollers arranged vertically are placed. Different specifications of plastic film are wound around the surfaces of the rollers. A feeding assembly consisting of an upper roller and a lower roller is fixed to the front of each roller to clamp the plastic film and feed it forward. A traction mechanism is also provided at the front of the raw material rack, with a crossbar and multiple pneumatic grippers for clamping the plastic film. The raw material rack drags the plastic film forward along a track. During the process, the required plastic film length is obtained by controlling the angle rotated by the servo motor of the rollers, and finally, it is cut by a cutting unit. This automatic cutting device can select the required rust-proof bags according to the specifications of the steel coil and automatically measure and cut them. The entire process requires no manual intervention. The application of this cutting device can improve the operating efficiency of rust-proof bag production lines and reduce safety risks. Attached Figure Description

[0024] Figure 1 The diagram shown is a three-dimensional structural schematic of the automatic cutting device in Embodiment 1 of the present invention.

[0025] Figure 2 The diagram shown is a side view of the automatic cutting device in Embodiment 1 of the present invention.

[0026] Figure 3 The diagram shown is a front view of the cutting unit in Embodiment 1 of the present invention.

[0027] Figure 4 The diagram shown is a schematic diagram of the pneumatic gripper in Embodiment 1 of the present invention.

[0028] Component designation explanation

[0029] 11. Base Plate

[0030] 12 orbits

[0031] 13 Traction mechanism

[0032] 14 Raw material racks

[0033] 15 rollers

[0034] 16 Feeding Components

[0035] 17 Cutting Unit

[0036] 131 Horizontal bar

[0037] 132 Drive belt

[0038] 171 blades

[0039] 172 Drive belt

[0040] 133 Pneumatic gripper Detailed Implementation

[0041] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0042] In the detailed description of embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0043] For ease of description, spatial relation terms such as “below,” “under,” “lower than,” “below,” “above,” and “upper” may be used herein to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features. It will be understood that these spatial relation terms are intended to include directions other than those depicted in the drawings for the device in use or operation. Furthermore, when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or there may be one or more layers in between. The phrase “between” as used herein includes both endpoint values.

[0044] In the context of this application, the structure described above the first feature may include embodiments in which the first and second features are formed in direct contact, or embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0045] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] Example 1

[0047] like Figures 1 to 4 As shown, this embodiment provides an automatic cutting device for rust-proof plastic bags, specifically including:

[0048] Base plate 11;

[0049] A raw material rack 14 is vertically fixed to a base plate 11. The raw material rack 14 includes two opposing side plates. A reinforcing elbow plate is provided at the connection between the side plates and the base plate. Multiple slots are provided on the rear edge of the side plates to accommodate multiple rollers 15 arranged vertically. The surfaces of the rollers 15 are wrapped with plastic films of different specifications. The plastic films serve as rust-proof bags for the steel coils. Different specifications of steel coils correspond to different specifications of plastic films. A feeding assembly 16 is fixed to the front side of each roller 15. Component 16 includes an upper roller and a lower roller. The upper roller and the lower roller clamp the plastic film and feed it forward. The upper roller and the lower roller are driven by a servo motor and rotate synchronously. The servo motor is connected to the drive shaft, and the drive shaft is connected to the two driven shafts of the upper and lower rollers to achieve synchronous rotation of the rollers. The ends of the rollers can move up and down by the pressure of bolts to change the gap between the upper roller and the lower roller to accommodate plastic films of different thicknesses. Its structure is similar to the structural design of common roller presses, and will not be described in detail here.

[0050] The front side of the raw material rack 14 is also provided with a traction mechanism 13. A crossbar 131 is provided on the side of the traction mechanism 13 closest to the raw material rack. Multiple pneumatic grippers 133 are mounted on the crossbar 131 for clamping the plastic film. The crossbar 131 can move vertically up and down to reach the desired position of the plastic film. The traction mechanism 13 includes a vertically arranged portal frame. The bottom end of the portal frame is connected to a track 12 located on the base plate 11 and can move back and forth along the track 12, thereby clamping the plastic film and dragging it forward. The pneumatic gripper is an actuator that uses compressed air as power to clamp or grasp workpieces. Based on its design, it can generally be divided into Y-type grippers and flat grippers. In this embodiment, since the plastic film is a planar flexible structure and needs to form a large contact surface with the grippers, the grippers of the pneumatic gripper in this embodiment are preferably flat grippers. The air supply line of the pneumatic gripper is arranged along the drag chain located on the portal frame to prevent interference.

[0051] Furthermore, the traction mechanism 13 also includes a transmission belt 132 arranged vertically. The end of the crossbar 131 is fixedly connected to the transmission belt 132, and the crossbar moves up and down through the operation of the belt. The two transmission belts 132 are respectively arranged along the left and right side frames of the portal frame of the traction mechanism, and the two transmission belts 132 are driven by the same motor, so that the two transmission belts run synchronously and ensure the stability of the crossbar's up and down movement.

[0052] Furthermore, it also includes a cutting unit 17, which is located in front of the feeding assembly. The cutting unit 17 includes a blade 171 and a horizontally placed transmission belt 172. The blade 171 is fixedly connected to the transmission belt 172. The blade 171 moves horizontally through the belt, thereby cutting the plastic film.

[0053] Furthermore, it also includes a steel coil information processing unit, which is connected to the production line system and can obtain information on the steel coils to be bagged on the current production line, thereby determining the required plastic film model.

[0054] Furthermore, it also includes a control unit, which is communicatively connected to the feeding assembly, traction mechanism, cutting unit, and steel coil information processing unit. Based on the required plastic film model fed back by the steel coil information processing unit, the crossbar of the traction mechanism moves up and down to the height of the corresponding roller, the pneumatic gripper clamps the end of the plastic film and drags it forward, while the feeding assembly simultaneously delivers the plastic film. During the process, the required plastic film length is obtained by controlling the rotation angle of the servo motors of the upper and lower rollers, and finally, it is cut by the cutting unit. The control unit can be a PLC.

[0055] Furthermore, it also includes a laser ranging unit, which is installed on the front side of the raw material rack near the traction mechanism. It is used to measure the distance between the raw material rack and the traction mechanism. Through this ranging unit, the delivery length of the plastic film can be indirectly known, which can be used as a length check to ensure that the length of the cut plastic film is accurate.

[0056] Furthermore, the roller surface of the feeding assembly and the pneumatic gripper surface of the traction mechanism are both covered with an adhesive layer to prevent the film material from slipping, ensure reliable feeding, and deliver the rust-proof plastic sleeve to the set length, while also avoiding scratching the plastic film.

[0057] Example 2

[0058] Based on the automatic cutting device in Embodiment 1 above, this embodiment provides a method for using the automatic cutting device, including the following steps:

[0059] S1: The steel coil is moved to the unit station. The steel coil information processing unit obtains the information of the steel coil to be bagged through the production line system and determines the required plastic film type.

[0060] S2: The control unit controls the crossbar 131 of the traction mechanism 13 to move up and down to the height of the roller where the corresponding plastic film is located, based on the required plastic film model fed back by the steel coil information processing unit.

[0061] S3: The pneumatic grippers of the traction mechanism 13 clamp the end of the plastic film and drag it forward, while the rollers of the feeding assembly 16 feed the plastic film out. During the process, the required length of the plastic film is obtained by controlling the rotation angle of the servo motors of the upper and lower rollers, and then cut by the cutting unit 17.

[0062] S4: The cut plastic film is manually wrapped onto the steel coil, and then the automatic cutting device performs the next cutting operation.

[0063] The automatic cutting device eliminates the need for manual intervention in the cutting process, reducing the number of workers from two to zero. Cutting time is reduced from three minutes per roll to approximately one minute per roll. Based on a labor cost of 295 yuan per day, the annual savings are 215,000 yuan. Plastic bags cost 550 yuan per roll (150 meters), and with 300 rolls used per day (8 rolls), a saving of 80 meters per roll is achieved: 80 * 365 ÷ 150 * 550 = 107,000 yuan. Therefore, the application of this automatic cutting device significantly reduces labor costs and improves operational efficiency.

[0064] In summary, this invention provides an automatic cutting device for rust-proof plastic bags and its usage method. The automatic cutting device includes a raw material rack fixed to a base plate, on which multiple rollers arranged vertically are placed. Different specifications of plastic film are wound around the surfaces of the rollers. A feeding assembly consisting of an upper roller and a lower roller is fixed to the front of each roller to clamp the plastic film and feed it forward. A traction mechanism is also provided at the front of the raw material rack, with a crossbar and multiple pneumatic grippers for clamping the plastic film. The raw material rack drags the plastic film forward along a track. During the process, the required plastic film length is obtained by controlling the angle rotated by the servo motor of the rollers, and finally, it is cut by a cutting unit. This automatic cutting device can select the required rust-proof bags according to the specifications of the steel coil and automatically measure and cut them. The entire process requires no manual intervention. The application of this cutting device can improve the operating efficiency of rust-proof bag production lines and reduce safety risks.

[0065] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An automatic cutting device for rust-proof plastic bags, characterized in that, The system includes a base plate, on which a raw material rack is vertically fixed. The raw material rack includes two opposing side plates, with multiple slots on the rear edge of each side plate to accommodate multiple rollers arranged vertically. The surfaces of the rollers are wrapped with plastic films of different specifications. Each roller has a feeding assembly fixed to its front side. The feeding assembly includes an upper roller and a lower roller, which clamp the plastic film and feed it forward. The front side of the raw material rack is also equipped with a traction mechanism. The traction mechanism has a crossbar on the side near the raw material rack. The crossbar is equipped with multiple pneumatic grippers for clamping the plastic film. The crossbar can move up and down in the vertical direction to reach the desired position of the plastic film.

2. The automatic cutting device for rust-proof plastic bags according to claim 1, characterized in that: It also includes a cutting unit located in front of the feeding assembly. The cutting unit includes a blade and a horizontally placed drive belt, with the blade and drive belt fixedly connected.

3. The automatic cutting device for rust-proof plastic bags according to claim 2, characterized in that: It also includes a steel coil information processing unit, which is connected to the production line system and can obtain information on the steel coils to be bagged on the current production line, thereby determining the required plastic film model.

4. The automatic cutting device for rust-proof plastic bags according to claim 3, characterized in that: It also includes a control unit, which is communicatively connected to the feeding assembly, traction mechanism, cutting unit, and steel coil information processing unit.

5. The automatic cutting device for rust-proof plastic bags according to claim 1, characterized in that: The traction mechanism includes a vertically arranged portal frame, the bottom end of which is connected to a track located on the base plate and can move back and forth along the track to clamp the plastic film and drag it forward.

6. The automatic cutting device for rust-proof plastic bags according to claim 1, characterized in that: The traction mechanism also includes a transmission belt arranged in the vertical direction, and the end of the crossbar is fixedly connected to the transmission belt, so that the crossbar can move up and down by the operation of the belt.

7. The automatic cutting device for rust-proof plastic bags according to claim 1, characterized in that: It also includes a laser ranging unit, which is installed on the front side of the material rack near the traction mechanism and is used to measure the distance between the material rack and the traction mechanism.

8. The automatic cutting device for rust-proof plastic bags according to claim 1, characterized in that: The roller surfaces of the feeding assembly and the pneumatic gripper surfaces of the traction mechanism are both covered with an adhesive layer.

9. The automatic cutting device for rust-proof plastic bags according to claim 1, characterized in that: The gripper fingers of the pneumatic gripper are flat.

10. The method of using the automatic cutting device for rust-proof plastic bags according to any one of claims 4-9, characterized in that, Includes the following steps: S1: The steel coil is moved to the unit station. The steel coil information processing unit obtains the information of the steel coil to be bagged through the production line system and determines the required plastic film type. S2: The control unit controls the crossbar of the traction mechanism to move to the height of the roller where the corresponding plastic film is located, based on the required plastic film model fed back by the steel coil information processing unit. S3: The pneumatic gripper of the traction mechanism clamps the end of the plastic film and drags it forward. At the same time, the roller of the feeding component runs to feed the plastic film out. During the process, the control unit controls the angle through which the servo motors of the upper and lower rollers rotate to obtain the required length of the plastic film, which is then cut by the cutting unit. S4: The cut plastic film is manually wrapped onto the steel coil, and then the automatic cutting device performs the next cutting operation.

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