A cutting device for a stretch film packaging machine

Abstract

This utility model relates to the field of packaging auxiliary equipment technology, and discloses a cutting device for a stretch film packaging machine, including a base assembly, a film-applying assembly, a drying assembly, a cross-cutting assembly, and a vertical-cutting assembly. The base assembly conveys the material, the film-applying assembly wraps the stretch film, the drying assembly dries the stretch film, and the cross-cutting and vertical-cutting assemblies perform transverse and longitudinal cuts respectively. The lifting component of the vertical-cutting assembly can adjust the cutting height. This device offers efficient and precise cutting, is adaptable to materials of different specifications, applies film to thin materials without wrinkles, and ensures tight adhesion to thick materials. The components are well-adjusted and interconnected, allowing for synchronized cutting and conveying rhythms, reducing empty cuts or missed cuts, and eliminating the need for frequent manual adjustments.

Description

Technical Field

[0001] This utility model relates to the field of packaging auxiliary equipment technology, specifically a cutting device for a stretch film packaging machine. Background Technology

[0002] In stretch film packaging operations, the cutting device is a key piece of equipment for achieving packaging automation, and its performance directly affects packaging efficiency and material packaging quality. However, existing cutting devices for stretch film packaging machines have many shortcomings and are difficult to meet the needs of batch and precise packaging.

[0003] A search revealed existing technology (application number: CN201921855132.7), which describes "a film-cutting and recycling device for a stretch film vacuum packaging machine." This utility model provides a film-cutting and recycling device for a stretch film vacuum packaging machine. Through the upward thrust of the cutter cylinder, the cutter side plate first contacts the silicone strip to press down on the film being cut. The spring contracts under the force of the cutter side plate, causing the blade to protrude and cut the film. Furthermore, it can collect the two waste edges of the stretch film generated during the operation of the stretch film vacuum packaging machine without any inductive limit switches, achieving a new level of automation and energy saving.

[0004] However, while existing stretch film vacuum packaging machines offer film cutting and recycling devices that utilize the upward thrust of the cutter cylinder to press the cutter side plate against the silicone strip and compress the film, causing the spring to contract under the force of the cutter side plate, resulting in the blade protruding and cutting the film, and without requiring any inductive limit switches, they can collect the two waste edges of the stretch film generated during operation, achieving a new level of automation and energy saving. However, some shortcomings remain: the cutting position adjustment of the horizontal and vertical cutting components is mostly manual, lacking a precise guiding structure, and the horizontal cutting... High verticality error of the cut and large error of the vertical cutting time interval result in inconsistent specifications of the cut materials. In addition, the blade height of some devices is fixed and cannot be adjusted according to the material thickness, which easily leads to incomplete cutting or over-cutting and damage to the material. The conveyor roller of the base assembly is prone to uneven speed, and the material is offset by a large amount during the conveying process, causing the cutting position to deviate from the preset trajectory. Frequent manual adjustments are required, which seriously affects the packaging efficiency. The position adjustment of the pressure roller of the film-applying assembly is inconvenient and it is difficult to adapt to materials of different thicknesses, resulting in wrinkles when applying film to thin materials and poor adhesion when applying film to thick materials. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a cutting device for a stretch film packaging machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a cutting device for a stretch film packaging machine, comprising: a base assembly, disposed on the ground; a film-applying assembly, one end of which is disposed on the base assembly; a drying assembly, disposed on the base assembly; a horizontal cutting assembly, disposed on the base assembly; and a vertical cutting assembly, disposed on the base assembly; wherein the vertical cutting assembly comprises: a lifting assembly, one end of which is disposed on the vertical cutting assembly for controlling lifting.

[0007] As a further description of the above technical solution:

[0008] The vertical cutting assembly further includes: a second motor, mounted on the base assembly; a one-way threaded rod, one end of which is fixedly connected to the output end of the second motor, and the other end of which is rotatably connected to the base assembly; a guide rod, both ends of which are welded to the two sides of the base assembly; and a slider, which is threadedly connected to the one-way threaded rod and slidably connected to the guide rod.

[0009] As a further description of the above technical solution:

[0010] The lifting assembly includes: a bidirectional threaded rod welded to the slider; two sets of translation blocks threadedly connected to both sides of the bidirectional threaded rod; a connecting rod rotatably connected at one end to the translation block; a blade holder rotatably connected to the other end of the connecting rod; and multiple sets of vertical cutting blades threadedly connected to the blade holder.

[0011] As a further description of the above technical solution:

[0012] The base assembly includes: a support plate, set on the ground; a first motor, set on the support plate; a conveyor roller, one end of which is fixedly connected to the output end of the first motor; a base plate, set on the conveyor roller; and a receiving basket, set on one side of the support plate, for receiving the cut material.

[0013] As a further description of the above technical solution:

[0014] The film-applying assembly includes: two sets of columns, one end of which is welded to a support plate; a discharge roller, with both ends welded to the other ends of the columns; a flattening roller, with both ends welded to the columns; a pressing roller, with both ends rotatably connected to the columns; and a locking rod, slidably connected to one end of the pressing roller and slidably connected to the support plate.

[0015] As a further description of the above technical solution:

[0016] The drying assembly includes: a housing welded to a support plate; and two sets of drying fans located inside the housing.

[0017] As a further description of the above technical solution:

[0018] The cross-cutting assembly includes: a bracket mounted on a support plate; a cylinder mounted on the bracket; and a cross-cutting blade fixedly connected to the output end of the cylinder.

[0019] This utility model has the following beneficial effects:

[0020] The cross-cutting assembly uses a cylinder to drive the cross-cutting blades, while the vertical cutting assembly's slider slides along a guide rod with precise guidance, resulting in minimal verticality error in the cross-cut and minimal vertical spacing error, leading to a high yield of qualified materials. The lifting assembly adjusts the height of the vertical cutting blades to accommodate different material thicknesses, and the blade spacing is adjustable without requiring disassembly or replacement of the blade holder, minimizing adjustment time and reducing equipment maintenance costs. The film-applying assembly's locking rod adjusts the position of the pressure rollers to accommodate materials of varying thicknesses, with adjustable clamping force. Thin materials are applied without wrinkles, while thick materials adhere tightly. Attached Figure Description

[0021] Figure 1 This is a front view of a cutting device for a stretch film packaging machine according to the present invention;

[0022] Figure 2 This is a schematic diagram of the film-applying assembly of a cutting device for a stretch film packaging machine according to the present invention;

[0023] Figure 3 This is a schematic diagram of the base assembly of a cutting device for a stretch film packaging machine according to the present invention;

[0024] Figure 4 This is a schematic diagram of the lifting assembly of a cutting device for a stretch film packaging machine according to the present invention;

[0025] Legend:

[0026] 1. Base assembly; 11. Support plate; 12. First motor; 13. Conveyor roller; 14. Base plate; 15. Receiving basket; 2. Film application assembly; 21. Column; 22. Discharge roller; 23. Flattening roller; 24. Pressing roller; 25. Locking rod; 3. Drying assembly; 31. Outer shell; 32. Drying fan; 4. Cross-cutting assembly; 41. Bracket; 42. Cylinder; 43. Cross-cutting blade; 5. Vertical cutting assembly; 51. Second motor; 52. One-way threaded rod; 53. Guide rod; 54. Slider; 55. Lifting assembly; 551. Two-way threaded rod; 552. Translation block; 553. Connecting rod; 554. Blade holder; 555. Vertical cutting blade. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1:

[0031] like Figures 1 to 4 As shown, the cutting device for a stretch film packaging machine provided in this embodiment includes: a base assembly 1, which is set on the ground; a film-applying assembly 2, one end of which is set on the base assembly 1; a drying assembly 3, which is set on the base assembly 1; a cross-cutting assembly 4, which is opened on the base assembly 1; and a vertical cutting assembly 5, which is set on the base assembly 1. The vertical cutting assembly 5 includes: a lifting assembly 55, one end of which is opened on the vertical cutting assembly 5 for controlling lifting.

[0032] In this embodiment, the film-applying component and the lifting component constitute a cutting device for a stretch film packaging machine according to this application.

[0033] It should also be noted that in some embodiments, the cutting device for the stretch film packaging machine can be a pneumatically driven cutting type, an electrically driven cutting type, a hydraulically driven cutting type, etc., wherein the pneumatically driven cutting type can be, but is not limited to, a single-cylinder driven type, a dual-cylinder synchronous driven type, a cylinder-connecting rod combination driven type, etc. Figure 1 In this embodiment, the cutting drive method of the cutting device for the stretch film packaging machine is pneumatically driven. Of course, other types of cutting devices for stretch film packaging machines can also adopt similar structures, which will not be described in detail below.

[0034] Understandable Figure 1 The diagram only schematically illustrates some components of a cutting device for a stretch film packaging machine; the actual shape, size, position, and construction of these components are not subject to change. Figure 1 Due to limitations, a cutting device for a stretch film packaging machine can also include, compared to... Figure 1 More or fewer parts.

[0035] It should also be understood that the first motor 12 and the second motor 51 were purchased from the market and are common knowledge in this field. They are only used and not modified, so the control method and circuit connection will not be described in detail.

[0036] In addition, in this embodiment, the base assembly 1 conveys materials, the film-applying assembly 2 completes the stretch film wrapping, the drying assembly 3 dries the stretch film, the cross-cutting assembly 4 and the vertical cutting assembly 5 perform horizontal and vertical cuts respectively, and the lifting assembly 55 adjusts the vertical cutting height.

[0037] Specifically, the vertical cutting component 5 also includes: a second motor 51, which is mounted on the base component 1; a one-way threaded rod 52, one end of which is fixedly connected to the output end of the second motor 51, and the other end is rotatably connected to the base component 1; a guide rod 53, with both ends welded to the two sides of the base component 1 respectively; and a slider 54, which is threadedly connected to the one-way threaded rod 52 and slidably connected to the guide rod 53.

[0038] In this embodiment, the second motor 51 drives the one-way threaded rod 52 to rotate, which in turn drives the slider 54 to move along the guide rod 53 to adjust the vertical cutting position.

[0039] Specifically, the lifting assembly 55 includes: a bidirectional threaded rod 551, welded to the slider 54; two sets of translation blocks 552, respectively threaded to both sides of the bidirectional threaded rod 551; a connecting rod 553, one end of which is rotatably connected to the translation block 552; a blade holder 554, rotatably connected to the other end of the connecting rod 553; and multiple sets of vertical cutting blades 555, threaded to the blade holder 554.

[0040] In this embodiment, rotating the bidirectional threaded rod 551 causes the translation block 552 to move relative to it, and the connecting rod 553 pushes the tool holder 554 up and down to adjust the height of the vertical cutting blade 555.

[0041] Specifically, the base assembly 1 includes: a support plate 11, which is set on the ground; a first motor 12, which is set on the support plate 11; a conveyor roller 13, one end of which is fixedly connected to the output end of the first motor 12; a base plate 14, which is set on the conveyor roller 13; and a receiving basket 15, which is set on one side of the support plate 11 for receiving the cut material.

[0042] In this embodiment, the first motor 12 drives the conveyor roller 13 to rotate, which in turn moves the material on the base plate 14, and the cut material falls into the receiving basket 15.

[0043] Specifically, the film-applying assembly 2 includes: two sets of columns 21, one end of which is welded to the support plate 11; a discharge roller 22, both ends of which are welded to the other end of the columns 21; a flattening roller 23, both ends of which are welded to the columns 21; a pressing roller 24, both ends of which are rotatably connected to the columns 21; and a locking rod 25, which is slidably connected to one end of the pressing roller 24 and to the support plate 11.

[0044] With this setup, the stretch film is released from the discharge roller 22, flattened by the flattening roller 23, and then covers the material. The pressing roller 24 presses the film onto the material, and the locking rod 25 fixes the position of the pressing roller 24.

[0045] Specifically, the drying component 3 includes: a housing 31 welded to the support plate 11; and two drying fans 32 located inside the housing 31.

[0046] The drying fan 32 blows out hot air, forming a circulating airflow inside the outer casing 31 to accelerate the drying of the stretch film.

[0047] Specifically, the cross-cutting assembly 4 includes: a bracket 41, which is mounted on the support plate 11; a cylinder 42, which is mounted on the bracket 41; and a cross-cutting blade 43, which is fixedly connected to the output end of the cylinder 42.

[0048] In this embodiment, the cylinder 42 extends and retracts, causing the cross-cutting blade 43 to move up and down, thus performing transverse cutting on the material passing through.

[0049] In actual use, the operating principle is as follows: First, the operator adjusts the number and position of the vertical cutting blades 555 on the blade holder 554 according to the base plate 14 produced in the previous process. Then, the first motor 12 is turned on to drive the conveyor roller 13 to rotate, so that the base plate 14 is conveyed forward. The pressure roller 24 is rotated according to the material height to press the plastic film onto the upper surface of the base plate 14. The sliding locking rod 25 is inserted into the support plate 11 to lock the pressure roller 24. The plastic film wrapped on the discharge roller 22 is conveyed to the pressure roller 24 through the flattening roller 23, and the film is pressed. After the material passes through the outer shell 31, the drying fan 32 blows hot air to dry the film and make it stick tightly to the bottom plate 14. The cylinder 42 is turned on to drive the cross-cutting blade 43 to cut the material horizontally. The second motor 51 is turned on to drive the one-way threaded rod 52 to rotate, so that the slider 54 slides along the guide rod 53 to the designated position. The two-way threaded rod 551 is rotated to drive the translation block 552 to slide, so that the connecting rod 553 rotates and drives the knife holder 554 to move up and down, so that the vertical cutting blade 555 reaches the designated position to cut the material vertically. The cut material falls into the receiving basket 15.

[0050] Both the first motor 12 and the second motor 51 are electrically connected to the PLC controller, which is electrically connected to an external power supply. The PLC controller facilitates the power supply control of the electrical equipment, ensuring that the equipment can be powered on when needed, thus avoiding situations where power cannot be supplied when power is required.

[0051] It should be noted that the controller can be a conventional known device that is controlled by a computer or other means. The detailed description of known functions and known components is omitted in the specific embodiments of this disclosure. In order to ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cutting device for a stretch film packaging machine, characterized in that: include: The base assembly (1) is set on the ground; The film application assembly (2) is mounted on the base assembly (1) at one end; The drying component (3) is mounted on the base component (1); A transverse component (4) is formed on the base component (1); The vertical cutting component (5) is mounted on the base component (1); The vertical cutting component (5) includes: The lifting assembly (55) has one end on the vertical cutting assembly (5) and is used to control the lifting.

2. The cutting device for a stretch film packaging machine according to claim 1, characterized in that: The vertical cutting component (5) also includes: The second motor (51) is mounted on the base assembly (1); One end of the one-way threaded rod (52) is fixedly connected to the output end of the second motor (51), and the other end is rotatably connected to the base assembly (1); The guide rod (53) is welded to both sides of the base assembly (1) at both ends; The slider (54) is threadedly connected to the one-way threaded rod (52) and slidably connected to the guide rod (53).

3. The cutting device for a stretch film packaging machine according to claim 2, characterized in that: The lifting assembly (55) includes: A two-way threaded rod (551) is welded onto a slider (54); The translation blocks (552) are in two sets, respectively threaded to both sides of the bidirectional threaded rod (551); The connecting rod (553) is rotatably connected at one end to the translation block (552); The tool holder (554) is rotatably connected to the other end of the connecting rod (553); The vertical cutting blades (555) are in multiple sets and are threaded onto the tool holder (554).

4. The cutting device for a stretch film packaging machine according to claim 3, characterized in that: The base assembly (1) includes: Support plate (11) is set on the ground; The first motor (12) is mounted on the support plate (11); The conveyor roller (13) is fixedly connected at one end to the output end of the first motor (12); The base plate (14) is mounted on the conveyor roller (13); The receiving basket (15) is located on one side of the support plate (11) and is used to receive the cut materials.

5. The cutting device for a stretch film packaging machine according to claim 4, characterized in that: The film-applying assembly (2) includes: The columns (21) are arranged in two groups, with one end welded to the support plate (11); The discharge roller (22) is welded to the other end of the column (21) at both ends; The flattening roller (23) is welded to the column (21) at both ends; The pressure roller (24) is rotatably connected to the column (21) at both ends; The locking rod (25) is slidably connected to one end of the pressure roller (24) and slidably connected to the support plate (11).

6. The cutting device for a stretch film packaging machine according to claim 5, characterized in that: The drying assembly (3) includes: The outer shell (31) is welded to the support plate (11); The drying fans (32) are in two sets and are located inside the outer casing (31).

7. A cutting device for a stretch film packaging machine according to claim 6, characterized in that: The transverse cutting component (4) includes: A bracket (41) is mounted on a support plate (11); Cylinder (42) is mounted on bracket (41); The cross-cutting blade (43) is fixedly connected to the output end of the cylinder (42).

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