Packaging film cutting device

Abstract

The utility model discloses a packaging film cutting device which comprises a machine table, a tool rest is installed on the machine table through a lifting assembly, a cutter extending in the front-back direction is installed on the lower side of the tool rest, and a pressing assembly and a tensioning assembly are arranged on the left side and the right side of the cutter respectively. The compressing assembly and the tensioning assembly are arranged on the left side and the right side of the cutter respectively, when the cutter sinks and cuts a packaging film, the compressing assembly compresses the packaging film firstly, then the tensioning assembly pulls the packaging film rightwards, and then the cutter conducts cutting work, the cutting accuracy of the packaging film is improved through the process, it is guaranteed that a notch is flat, and the cutting efficiency is improved. Deckle edges and tearing risks are reduced; the initial vertical position of a straight pressing plate in the pressing assembly and the initial angle of an inclined pressing plate in the tensioning assembly can be adjusted, so that the maximum pressure and the dragging distance of a packaging film are adjusted, the packaging film is prevented from being damaged, and the yield is improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging film technology, and in particular to a packaging film cutting device. Background Technology

[0002] In the production process of packaging bags, cutting is a key technological step to transform continuous materials into individual finished products. Its purpose is to divide rolls of packaging bag material (such as packaging film) into individual packaging films with specific sizes according to design specifications.

[0003] In existing packaging film cutting machines, if the traction rollers on both sides of the cutter exert insufficient traction on the packaging film when the cutter cuts vertically downwards, the packaging film will not be taut enough and will easily deform during cutting. For example, in a packaging film cutting device disclosed in application number CN201922488695.3, when the cutter is downwards, part of the packaging film is easily embedded in the groove, resulting in rough edges and uneven cuts, which reduces the yield rate. Therefore, improvements are needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a packaging film cutting device to solve the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a packaging film cutting device, including a machine base, a knife holder is mounted on the machine base via a lifting component, a cutting blade extending in the front-to-back direction is mounted on the lower side of the knife holder, and a pressing component and a tensioning component are respectively arranged on the left and right sides of the cutting blade;

[0006] The clamping assembly includes a slide rod that is slidably connected to the tool holder. A composite ring is installed on one side of the slide rod extending to the upper side of the tool holder. The composite ring is connected to the upper side of the tool holder by a No. 1 spring. A straight pressure plate is installed at the end of the slide rod located on the lower side of the tool holder.

[0007] The tensioning assembly includes a mounting platform disposed on the lower side of the tool holder, a slanted pressure plate hinged inside the mounting platform, and one side of the slanted pressure plate being connected to the mounting platform by a second spring.

[0008] Preferably, the composite ring includes a threaded ring and a spring ring, the spring ring is coaxial with the threaded ring, and the spring ring is rotatably connected to the lower side of the threaded ring, the first spring is connected to the lower side of the spring ring, and the slide rod is threadedly connected to the threaded ring.

[0009] Preferably, the threaded ring is provided with a plurality of first through holes, the first through holes being arranged at equal angles with the axis of the threaded ring as the center, and the upper side of the tool holder is also provided with a first slot, into which a first pin is inserted through the first through hole.

[0010] Preferably, there are two No. 1 pins and two No. 1 slots, which are symmetrically distributed along the axis of the threaded ring.

[0011] Preferably, the first pin is threaded into the first slot.

[0012] Preferably, the mounting platform includes a fixed part and a sliding part, the sliding part is slidably connected to the fixed part, and the second spring is connected to the lower side of the sliding part;

[0013] The tool holder is rotatably connected to a threaded shaft that passes downward through the fixed part and is threaded into the sliding part. The threaded shaft extends to the upper end of the upper side of the tool holder and is fitted with a cap.

[0014] Preferably, the screw cap has multiple second through holes that are vertically connected and arranged around the threaded shaft, and the upper side of the tool holder also has a second slot, in which a second pin is installed that passes through the second through hole.

[0015] Preferably, a traction component is provided on the upper side of the machine platform on both the left and right sides of the tool holder;

[0016] The traction assembly includes a groove disposed on the upper side of the machine platform, a mounting plate is respectively mounted on the machine platform on the front and rear sides of the groove, a traction roller is respectively mounted on the front and rear sides of the groove and between the mounting plates, and a driving component for driving the traction roller to rotate to transfer the packaging film to the right.

[0017] Preferably, the lifting assembly includes supports distributed front and rear on the machine platform, a top plate is mounted on the upper end of the supports, a cylinder is mounted on the top plate, and a piston rod inside the cylinder passes downward through the top plate and is fixed to the upper end of the tool holder.

[0018] This utility model provides a packaging film cutting device, which has the following beneficial effects:

[0019] This invention features a pressing component and a tensioning component on the left and right sides of the cutter, respectively. When the cutter descends and cuts the packaging film, the pressing component first presses the packaging film, and then the tensioning component pulls the packaging film to the right, allowing the cutter to perform the cutting operation. This process improves the accuracy of the packaging film cutting, ensures a smooth cut, and reduces the risk of burrs and tears.

[0020] In this invention, the initial vertical position of the straight pressure plate in the pressing assembly and the initial angle of the inclined pressure plate in the tensioning assembly can be adjusted to adjust the maximum pressure and pulling distance of the packaging film, avoid damage to the packaging film, and improve the yield rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the appearance of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure within this utility model;

[0023] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0024] In the picture:

[0025] 11. Machine base; 12. Tool holder; 13. Cutting knife; 21. Slide rod; 22. Composite ring; 23. Straight pressure plate; 31. Mounting platform; 32. Inclined pressure plate; 41. Threaded ring; 42. Spring ring; 43. No. 1 through hole; 44. No. 1 pin; 51. Fixing part; 52. Sliding part; 53. Threaded shaft; 54. Screw cap; 61. Top plate; 62. Cylinder; 71. Traction roller. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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.

[0030] Reference Figures 1-3 According to an embodiment of the packaging film cutting device of the present invention, it includes a machine base 11, on which a blade holder 12 is mounted via a lifting assembly. A cutting blade 13 extending in a front-to-back direction is mounted on the lower side of the blade holder 12, and a blade groove adapted to the cutting blade 13 is provided on the upper side of the machine base 11. A pressing assembly and a tensioning assembly are respectively provided on the left and right sides of the cutting blade 13. When the packaging film is pulled to the right on the machine base 11 and cut by the cutting blade 13, the pressing mechanism can press the packaging film, and the tensioning mechanism can stretch the packaging film to the right, thereby enabling the cutting blade 13 to accurately cut the packaging film, avoiding skew at the cut and improving the flatness.

[0031] In this embodiment, the clamping assembly includes a slide rod 21 that is slidably connected to the tool holder 12. A composite ring 22 is installed on one side of the slide rod 21 extending to the upper side of the tool holder 12. The composite ring 22 is connected to the upper side of the tool holder 12 by a spring. A straight pressure plate 23 is installed at the end of the slide rod 21 located on the lower side of the tool holder 12.

[0032] The tensioning assembly includes a mounting platform 31 disposed on the lower side of the tool holder 12. An inclined pressure plate 32 is hinged inside the mounting platform 31, and one side of the inclined pressure plate 32 is connected to the mounting platform 31 by a second spring.

[0033] When the lifting assembly controls the knife holder 12 to move downward, the straight pressure plate 23 will first press against and fix the packaging film located on the machine base 11. Then, as the knife holder 12 continues to descend, the lower edge of the inclined pressure plate 32 will abut against the packaging film. After that, the inclined pressure plate 32 will rotate counterclockwise at a certain angle. During this process, the packaging film on the right side of the straight pressure plate 23 will be pulled and straightened by the inclined pressure plate 32. After that, the cutter 13 will descend and cut the packaging film.

[0034] In a second embodiment of the packaging film cutting device, in order to adjust the initial height of the straight pressure plate 23 and the stretching distance of the inclined pressure plate 32, the composite ring 22 includes a threaded ring 41 and a spring ring 42. The spring ring 42 is coaxial with the threaded ring 41, and the spring ring 42 is rotatably connected to the lower side of the threaded ring 41. The first spring is connected to the lower side of the spring ring 42, and the slide rod 21 is threadedly connected to the threaded ring 41.

[0035] The threaded ring 41 is provided with a plurality of first through holes 43, which are arranged at equal angles with the axis of the threaded ring 41 as the center. The upper side of the tool holder 12 is also provided with a first slot, into which a first pin 44 is inserted, penetrating upward through the first through hole 43.

[0036] When it is necessary to adjust the initial vertical position of the straight pressure plate 23 to adjust the pressure of the straight pressure plate 23 on the packaging film when the knife holder 12 is at its lowest position (the cutter 13 has finished cutting the packaging film), the operator can pull out the first pin 44 and rotate the threaded ring 41. During this process, the slide rod 21 will be adjusted vertically relative to the knife holder 12, while the spring ring 42 will remain relatively stationary with respect to the knife holder 12 under the action of the first spring.

[0037] After the sliding rod 21 and the straight pressure plate 23 are adjusted vertically, the worker can insert the first pin 44 through the first through hole 43 and into the first slot. Figure 1 and Figure 3 There is a 90-degree angular deviation between the threaded rings 41 to lock the angle of the threaded rings 41. After that, if the knife holder 12 sinks, the threaded rings 41 and the spring rings 42 will float up and down, and the first spring will provide the downward pressure of the straight pressure plate 23 on the packaging film.

[0038] In order to make the threaded ring 41 and the spring ring 42 move smoothly up and down and reduce friction, two first pins 44 and two first slots are provided and are symmetrically distributed along the axis of the threaded ring 41.

[0039] In order to prevent the first pin 44 from being pulled out when the threaded ring 41 and the spring ring 42 move up and down, the first pin 44 is designed to be threaded into the first slot.

[0040] In addition, in order to make the vertical movement of the straight pressure plate 23 more stable, multiple auxiliary rods of the first type are provided on the upper side of the straight pressure plate 23, which penetrate upward through the tool holder 12.

[0041] In the mounting platform 31, the mounting platform 31 includes a fixed part 51 and a sliding part 52. The sliding part 52 is slidably connected to the fixed part 51, and the second spring is connected to the lower side of the sliding part 52.

[0042] The tool holder 12 is rotatably connected to a threaded shaft 53 that passes downward through the fixed part 51 and is threadedly connected to the sliding part 52. The threaded shaft 53 extends to the upper end of the upper side of the tool holder 12 and is fitted with a cap 54.

[0043] When it is necessary to adjust the initial angle of the inclined pressure plate 32 to adjust the lateral movement distance of the inclined pressure plate 32 when the knife holder 12 moves to the lowest position, the operator can rotate the cap 54 to adjust the up and down position of the sliding part 52, and then adjust the initial angle of the inclined pressure plate 32 through the second spring.

[0044] To prevent the threaded shaft 53 from rotating due to vibration during the up-and-down movement of the tool holder 12, the screw cap 54 is provided with a plurality of second through holes that are vertically connected and arranged around the threaded shaft 53. The upper side of the tool holder 12 is also provided with a second slot, and a second pin that passes through the second through hole is installed in the second slot.

[0045] In addition, in order to enable the packaging film to move to the right and be cut, a traction component is respectively provided on the upper side of the machine base 11 on the left and right sides of the knife holder 12;

[0046] The traction assembly includes a groove provided in the upper side of the machine base 11, and a mounting plate is respectively mounted on the machine base 11 on the front and rear sides of the groove. A traction roller 71 is respectively mounted on the front and rear sides of the groove and between the mounting plates. It also includes a driving component for driving the traction roller 71 to rotate to transfer the packaging film to the right.

[0047] Specifically, the upper traction roller 71 in the two traction assemblies rotates counterclockwise, while the lower traction roller 71 rotates clockwise, thereby driving the packaging film located between them to move to the right. In one embodiment of the drive unit, the drive unit includes a motor mounted on the machine base 11, and the output shaft of the motor is connected to the lower traction roller 71. The two traction rollers 71 in one traction assembly are connected by a gear set to perform synchronous reverse motion (not shown in the figure). This is prior art and will not be described in detail here.

[0048] The lifting assembly includes a support bracket distributed front and back on the machine base 11. A top plate 61 is mounted on the upper end of the support bracket. A cylinder 62 is mounted on the top plate 61. The piston rod inside the cylinder 62 passes through the top plate 61 and is fixed to the upper end of the blade holder 12. When cutting the packaging film, the cylinder 62 can control the up and down position of the blade holder 12 and the cutter 13 and perform the cutting. In order to make the lifting of the blade holder 12 stable, several auxiliary rods are also mounted on the upper side of the blade holder 12, which pass through the top plate 61.

[0049] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A packaging film cutting apparatus comprising a table (11), characterized in that: The machine base (11) is equipped with a blade holder (12) via a lifting assembly. A cutting blade (13) extending in the front-to-back direction is mounted on the lower side of the blade holder (12). A pressing assembly and a tensioning assembly are respectively provided on the left and right sides of the cutting blade (13). The clamping assembly includes a slide rod (21) that is slidably connected to the tool holder (12) and extends to one side of the tool holder (12) with a composite ring (22). The composite ring (22) is connected to the upper side of the tool holder (12) by a spring and a straight pressure plate (23) is installed at the end of the slide rod (21) located on the lower side of the tool holder (12). The tensioning assembly includes a mounting platform (31) disposed on the lower side of the tool holder (12), a slanted pressure plate (32) is hinged in the mounting platform (31), and one side of the slanted pressure plate (32) is connected to the mounting platform (31) by a second spring.

2. The packaging film cutting apparatus according to claim 1, characterized in that: The composite ring (22) includes a threaded ring (41) and a spring ring (42). The spring ring (42) is coaxial with the threaded ring (41), and the spring ring (42) is rotatably connected to the lower side of the threaded ring (41). The first spring is connected to the lower side of the spring ring (42), and the slide rod (21) is threadedly connected to the threaded ring (41).

3. The packaging film cutting apparatus according to claim 2, wherein: The threaded ring (41) is provided with a plurality of first through holes (43), the first through holes (43) are set at equal angles with the axis of the threaded ring (41) as the center, and the upper side of the tool holder (12) is also provided with a first slot, and a first pin (44) is inserted into the first slot and passes through the first through hole (43) upward.

4. The packaging film cutting apparatus according to claim 3, wherein: There are two No. 1 pins (44) and No. 1 slots, which are symmetrically distributed along the axis of the threaded ring (41).

5. The packaging film cutting apparatus according to claim 3, wherein: The first pin (44) is threaded into the first slot.

6. The packaging film cutting apparatus of claim 1, wherein: The mounting platform (31) includes a fixed part (51) and a sliding part (52). The sliding part (52) is slidably connected to the fixed part (51) and the second spring is connected to the lower side of the sliding part (52). The tool holder (12) is rotatably connected to a threaded shaft (53) that passes downward through the fixed part (51) and is threadedly connected to the sliding part (52). The threaded shaft (53) extends to the upper end of the tool holder (12) and is fitted with a cap (54).

7. The packaging film cutting apparatus of claim 6, wherein: The cap (54) has multiple second through holes that are vertically connected and arranged around the threaded shaft (53). The upper side of the tool holder (12) also has a second slot, and the second slot is equipped with a second pin that passes through the second through hole.

8. A packaging film cutting device according to claim 1, characterized in that: A traction assembly is respectively provided on the upper side of the machine base (11) on the left and right sides of the tool holder (12); The traction assembly includes a groove disposed on the upper side of the machine base (11), and an mounting plate is respectively mounted on the machine base (11) on the front and rear sides of the groove. A traction roller (71) is respectively mounted on the front and rear sides of the groove and between the mounting plates. It also includes a drive component for driving the traction roller (71) to rotate to transfer the packaging film to the right.

9. The apparatus of claim 1 wherein: The lifting assembly includes a support bracket distributed front and back on the machine base (11). The upper end of the support bracket is equipped with a top plate (61). A cylinder (62) is mounted on the top plate (61). The piston rod inside the cylinder (62) passes through the top plate (61) downward and is fixed to the upper end of the tool holder (12).

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