A high-precision puncher for shrink film

Abstract

The utility model discloses a kind of high-precision punchers for shrink film, it is related to plastic film production equipment field, the technical scheme of the utility model includes pedestal and punch assembly;The upper surface of the pedestal is the punch platform for laying shrink film, the punch platform is provided with air hole, the air hole is communicated with positive and negative pressure generating device;Bracket is provided in the side direction of the punch platform, the punch assembly is set in the upper of the punch platform, and the punch assembly is used to punch downwards to shrink film.In punch, shrink film can be stabilized in punch platform by negative pressure, avoid moving, improve the accuracy of punching.

Description

Technical Field

[0001] This utility model relates to the field of plastic film production equipment, and in particular to a high-precision punching machine for shrink film. Background Technology

[0002] A film material that utilizes the heat-shrinkage properties of pre-stretched films for tight packaging of products. Based on the memory effect of thermoplastics, this type of film shrinks to its original shape after heating, exhibiting properties such as transparency, sealing, moisture resistance, and puncture resistance. It is widely used in commodity packaging and industrial protection.

[0003] In some shrink film production processes, there is a need for punching. Currently, related punching equipment, such as the automatic punching machine for shrink film with precise positioning disclosed in patent document CN213532929U, punches by rotating a large hole while pressing it with an auxiliary wheel. However, this solution has some accuracy problems in actual punching. This is because using a large rotating hole may cause twisting and pulling on the surface of the shrink film, resulting in inaccuracy. In addition, the auxiliary wheel only presses the film; if the punching needle rotates on the surface of the shrink film, the plastic film is subjected to twisting force, and the auxiliary wheel cannot play a limiting role. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a high-precision punching machine for shrink films. After punching, the shrink film can be stabilized on the punching platform by negative pressure to avoid movement and improve the accuracy of punching.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a high-precision punching machine for shrink film, including a base and a punching assembly; The upper surface of the base is a perforation platform for laying a shrink film. The perforation platform is provided with air holes, which are connected to a positive and negative pressure generating device. A support is provided on the side of the punching platform, and the punching assembly is disposed above the punching platform. The punching assembly is used to punch holes in the shrink film downwards.

[0006] In use, the shrink film is laid on the punching platform. After the position is determined, a negative pressure is provided by a positive and negative pressure generating device. The negative pressure of the air holes is used to adsorb the shrink film onto the punching platform, preventing the shrink film from moving on the punching platform. This allows for precise positioning when the punching component punches holes in the shrink film, improving the yield of punched products. After punching is completed, the positive and negative pressure generating device provides positive pressure and fills the space between the shrink film and the punching platform with air, making it easier to remove the shrink film from the punching platform.

[0007] Preferably, the positive and negative pressure generating device includes a positive and negative pressure air pump. This provides both positive and negative pressure, making it easier to position and remove the shrink film.

[0008] Preferably, the punching platform is vertically provided with a discharge hole corresponding to the punching component. The lower end of the discharge hole is connected to the positive and negative pressure air pump via an air pipe. A waste bin is provided in the middle of the air pipe, and the waste bin is provided with an openable door. Since the discharge hole is connected to the positive and negative pressure air pump, after punching, the positive and negative pressure air pump still provides only negative pressure. Therefore, the waste will enter the positive and negative pressure air pump along the pipe. To avoid this situation, a waste bin is provided. After the waste enters the waste bin, the bin space is larger, the airflow velocity decreases, and the waste will fall downwards, preventing it from continuing to flow towards the positive and negative pressure air pump, thus achieving the function of waste collection.

[0009] Preferably, the waste bin has a feed inlet in the middle, which communicates with the discharge hole. The top of the waste bin has a top hole that communicates with the positive and negative pressure air pump, and the top hole is equipped with a filter screen. There is a gap between the feed inlet and the top hole, so that the waste lacks the force to flow towards the top hole, and thus sinks downward. At the same time, the filter screen in the top hole can further prevent the waste from entering the positive and negative pressure air pump.

[0010] Preferably, a pressure relief hole is provided at the top of the air vent. This can prevent excessive negative pressure in the air vent from causing deformation of the shrink film. At the same time, since it is located at the top of the air vent, after the waste is generated, it will move slightly downwards and be located between the pressure relief hole and the lower end of the air vent (the negative pressure end). Therefore, the waste can be moved towards the waste bin with sufficient negative pressure.

[0011] Preferably, the support includes a column and a crossbeam disposed above the drilling platform. The lower end of the column is fixed to the drilling platform, and the upper end of the column is fixed to both ends of the crossbeam. The drilling assembly is disposed on the crossbeam. This facilitates the fixing of the drilling assembly.

[0012] Preferably, the punching assembly includes a lifting column, a punch, and a pressure cylinder. The lifting column is vertically slidably fitted to the crossbeam. The crossbeam is equipped with a cylinder that drives the lifting column to move up and down. The punch is located at the lower end of the lifting column. An upper limit platform and a lower limit platform are provided on the side wall of the lifting column. The pressure cylinder is sleeved on the lifting column. An inner platform is provided inward on the pressure cylinder. The inner platform is located at the upper limit platform and the lower limit platform. A spring is provided on the lifting column between the inner platform and the upper limit platform. The spring pushes the pressure cylinder downward. When the lower end of the pressure cylinder is not subjected to an upward pushing force, the lower end of the pressure cylinder is located below the punch.

[0013] When drilling downwards, since the lower end of the pressure cylinder is below the punch, it will first contact the shrink film, pressing the shrink film to prevent it from moving. Then it continues downwards, and the spring is under pressure, causing the punch to continue moving downwards relative to the pressure cylinder until it contacts the shrink film to make a hole. Then the punch moves upwards first, and then drives the pressure cylinder upwards away from the shrink film. This completes the drilling of the shrink film, and the drilling is very precise.

[0014] Preferably, a contact plate is horizontally arranged outward from the lower part of the pressure cylinder. This increases the contact area and prevents damage to the shrink film.

[0015] The beneficial effects of this utility model are: This solution can stabilize the shrink film on the punching platform by using negative pressure after punching, preventing movement and improving the accuracy of punching. The addition of a pressure cylinder can also improve accuracy. Attached Figure Description

[0016] 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 will be briefly introduced below. Obviously, the drawings described below are only two of the drawings in this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 A magnified view of part A; Among them, the base 1, column 2, crossbeam 3, cylinder 4, lifting column 5, upper limit platform 6, lower limit platform 7, spring 8, pressure cylinder 9, contact plate 10, inner platform 11, punch 12, material ejection hole 13, pressure relief hole 14, air hole 15, air pipe 16, waste bin 17, feed inlet 18, top hole 19, positive and negative pressure air pump 20. Detailed Implementation

[0018] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model. Example

[0019] like Figure 1 As shown, a high-precision punching machine for shrink film includes a base 1 and a punching assembly; The upper surface of the base 1 is a perforation platform for laying a shrink film. The perforation platform is provided with air holes 15, which are connected to a positive and negative pressure generating device. A support is provided on the side of the punching platform, and the punching assembly is disposed above the punching platform. The punching assembly is used to punch holes in the shrink film downwards.

[0020] In use, the shrink film is laid on the punching platform. Once the position is determined, a negative pressure is provided by the positive and negative pressure generator. The negative pressure from the air vent 15 adheres the shrink film to the punching platform, preventing it from shifting. This allows for precise positioning of the shrink film when the punching assembly punches holes downwards, improving the yield rate. After punching, the positive and negative pressure generator provides positive pressure, filling the space between the shrink film and the punching platform with air to facilitate removal of the shrink film from the platform. In reality, because the shrink film is very light, it will separate from the punching platform if the positive and negative pressure air pump 20 does not provide negative pressure or provides only a slight positive pressure.

[0021] The positive and negative pressure generating device includes a positive and negative pressure air pump 20. It can provide positive and negative pressure, making it easier to position and remove the shrink film.

[0022] The punching platform is vertically equipped with a discharge hole 13 corresponding to the punching assembly. The lower end of the discharge hole 13 is connected to the positive and negative pressure air pump 20 via an air pipe 16. A waste bin 17 is provided in the middle of the air pipe 16, and the waste bin 17 is equipped with an openable door. Since the discharge hole 13 is connected to the positive and negative pressure air pump 20, after punching, the positive and negative pressure air pump 20 still provides only negative pressure. Therefore, the waste will enter the positive and negative pressure air pump 20 along the pipe. To avoid this situation, the waste bin 17 is provided. After the waste enters the waste bin 17, the bin space is larger, the airflow velocity is lower, and the waste will fall downward, preventing it from continuing to flow towards the positive and negative pressure air pump 20, thus achieving the function of waste collection.

[0023] The waste bin 17 has a feed inlet 18 in the middle, which communicates with the discharge hole 13. The top of the waste bin 17 has a top hole 19 that communicates with the positive and negative pressure air pump 20, and the top hole 19 is equipped with a filter screen. There is a gap between the feed inlet and the top hole 19, so that the waste lacks the force to flow to the top hole 19 and thus sinks downwards. At the same time, the filter screen in the top hole 19 can further prevent the waste from entering the positive and negative pressure air pump 20.

[0024] The dotted line and the actual line indicated by number 16 in the figure are both trachea 16.

[0025] A pressure relief hole 14 is provided at the top of the air hole 15. This can prevent the negative pressure of the air hole 15 from being too large, which would cause the shrink film to deform. At the same time, since it is located at the top of the air hole 15, after the waste is generated, it will move slightly downward and be between the pressure relief hole 14 and the lower end of the air hole 15 (the negative pressure end). Therefore, the waste can be moved towards the waste bin 17 with sufficient negative pressure.

[0026] The support includes a column 2 and a crossbeam 3 disposed above the drilling platform. The lower end of the column 2 is fixed to the drilling platform, and the upper end of the column 2 is fixed to both ends of the crossbeam 3. The drilling assembly is disposed on the crossbeam 3 for easy fixing of the drilling assembly.

[0027] The drilling assembly includes a lifting column 5, a punch 12, and a pressure cylinder 9. The lifting column 5 is vertically slidably fitted to the crossbeam 3. The crossbeam 3 is equipped with a cylinder 4 that drives the lifting column 5 to move up and down. The punch 12 is located at the lower end of the lifting column 5. An upper limit platform 6 and a lower limit platform 7 are provided on the side wall of the lifting column 5. The pressure cylinder 9 is sleeved on the lifting column 5. An inner platform 11 is provided inward on the pressure cylinder 9. The inner platform 11 is located between the upper limit platform 6 and the lower limit platform 7. A spring 8 is provided on the lifting column 5 between the inner platform 11 and the upper limit platform 6. The spring 8 pushes the pressure cylinder 9 downward. When the lower end of the pressure cylinder 9 is not pushed upward, the lower end of the pressure cylinder 9 is located below the punch 12.

[0028] When drilling downwards, since the lower end of the pressure cylinder 9 is below the punch 12, it will first contact the shrink film, press the shrink film tightly to prevent it from moving, and then continue downwards. The spring 8 is under pressure, and the punch 12 continues to move downwards relative to the pressure cylinder 9 until it contacts the shrink film to drill a hole. Then the punch 12 moves upwards first, and then drives the pressure cylinder 9 upwards away from the shrink film. This completes the drilling of the shrink film, and the drilling is very precise.

[0029] A contact plate 10 is horizontally arranged outward from the lower part of the pressure cylinder 9. This increases the contact area and prevents damage to the shrink film.

[0030] The beneficial effects of this utility model are: This solution can stabilize the shrink film on the punching platform by using negative pressure after punching, preventing movement and improving the accuracy of punching. The pressure cylinder 9 is also set up to improve accuracy.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-precision punching machine for shrink films, characterized in that, Includes a base (1) and a punching assembly; The upper surface of the base (1) is a perforation platform for laying a shrink film. The perforation platform is provided with air holes (15), which are connected to a positive and negative pressure generating device. A support is provided on the side of the punching platform, and the punching assembly is disposed above the punching platform. The punching assembly is used to punch holes in the shrink film downwards.

2. The high-precision perforation machine for shrink film according to claim 1, characterized in that: The positive and negative pressure generating device includes a positive and negative pressure air pump (20).

3. A high-precision perforation machine for shrink films according to claim 2, characterized in that: The punching platform is vertically provided with a discharge hole (13) corresponding to the punching component. The lower end of the discharge hole (13) is connected to the positive and negative pressure air pump (20) through an air pipe (16). A waste bin (17) is provided in the middle of the air pipe (16). The waste bin (17) is provided with an openable bin door.

4. A high-precision perforation machine for shrink films according to claim 3, characterized in that: The waste bin (17) is provided with a feed inlet (18) in the middle, which is connected to the discharge hole (13). The waste bin (17) is provided with a top hole (19) connected to the positive and negative pressure air pump (20) at the top, and a filter screen is provided in the top hole (19).

5. A high-precision punching machine for shrink film according to claim 4, characterized in that: The top of the vent (15) is provided with a pressure relief hole (14).

6. A high-precision perforation machine for shrink films according to claim 1, characterized in that: The support includes a column (2) and a crossbeam (3) disposed above the drilling platform. The lower end of the column (2) is fixed to the drilling platform, and the upper end of the column (2) is fixed to both ends of the crossbeam (3). The drilling assembly is disposed on the crossbeam (3).

7. A high-precision punching machine for shrink film according to claim 6, characterized in that: The punching assembly includes a lifting column (5), a punch (12), and a pressure cylinder (9). The lifting column (5) is vertically slidably fitted to the crossbeam (3). The crossbeam (3) is equipped with a cylinder (4) that drives the lifting column (5) to move up and down. The lower end of the lifting column (5) is equipped with the punch (12). The side wall of the lifting column (5) is equipped with an upper limit platform (6) and a lower limit platform (7). The pressure cylinder (9) is sleeved on the lifting column (5). The pressure cylinder (9) is equipped with an inner platform (11) inward. The inner platform (11) is located between the upper limit platform (6) and the lower limit platform (7). The lifting column (5) between the inner platform (11) and the upper limit platform (6) is equipped with a spring (8). The spring (8) pushes the pressure cylinder (9) downward. When the lower end of the pressure cylinder (9) is not subjected to an upward pushing force, the lower end of the pressure cylinder (9) is located below the punch (12).

8. A high-precision perforation machine for shrink films according to claim 7, characterized in that: The pressure cylinder (9) is provided with a contact plate (10) horizontally outward from the lower direction.

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