Automatic stretching plastic film cutting device

Abstract

The invention relates to an automatic stretching plastic film cutting device. The vertical operation assembly is provided with a clamping block and can adjust the length of a plastic film and stretch the plastic film, the combined cutting assembly is used for cutting the plastic film and is provided with a clamping hot cutter, the rotating assembly is used for rotating and is matched with the vertical operation assembly to adjust the length of the plastic film, and the vertical operation assembly is installed on the side edge of the machine frame. The combined cutting assembly and the rotating assembly are both installed on the top of the rack, and the plastic film is wound around a rotating roller of the rotating assembly. The material cutting device is compact and ingenious in structure, by arranging the vertical operation assembly capable of adjusting the length of the plastic film and capable of being stretched, the plastic film is cut through the combining and cutting assembly, the discharging length of the plastic film can be automatically controlled, the probability of material waste is reduced, meanwhile, the operation efficiency can be improved, and the use experience of a user is enhanced; and popularization and application of the automatic stretching plastic film cutting device in the technical field of packaging are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, in particular to an automatic stretching plastic film cutting device. Background Art

[0002] Plastic film is usually made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, used for packaging and as a coating layer. Plastic packaging and plastic packaging products occupy an increasingly large share in the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical and other fields, among which food packaging accounts for the largest proportion, such as beverage packaging, frozen food packaging, steamed food packaging, fast food packaging, etc. These products have brought great convenience to people's lives.

[0003] Different types of plastic films may require specific operating skills and equipment, such as stretch film, wrapping film, self-adhesive film, etc., and their operation methods will be different. Existing plastic films are usually torn manually. During this process, the discharge length is often uncontrolled, resulting in unnecessary material waste and increased use costs. Inaccurate discharge length may also require additional time for cutting or adjustment, thereby reducing production efficiency and affecting the user experience. Summary of the invention

[0004] In order to overcome the defects in the above-mentioned prior art, the object of the present invention is to provide an automatic stretching plastic film cutting device, which has a compact and ingenious structure, can automatically control the discharge length of the plastic film, reduce the probability of material waste, and at the same time improve operational efficiency and enhance the user experience, which is conducive to the promotion and application of the above-mentioned automatic stretching plastic film cutting device in the field of packaging technology.

[0005] In order to achieve the above-mentioned invention objectives, the present invention adopts the following technical scheme: an automatic stretching plastic film cutting device, comprising a frame, an upper and lower running component with a clamping block and capable of adjusting the length of the plastic film and stretching the plastic film, a cutting component for cutting the plastic film and having a clamping hot cutting knife, and a rotating component for rotating and cooperating with the upper and lower running components to adjust the length of the plastic film, the upper and lower running components are installed on the side of the frame, the cutting component and the rotating component are both installed on the top of the frame, and the plastic film is wound around the rotating roller of the rotating component.

[0006] As a preferred solution of the present invention, the frame includes a pair of relatively arranged columns; the up and down running components are divided into two groups, and each group of the up and down running components also includes a fixed base plate, a servo motor, a running screw, an up and down running slide rail, an up and down running slider, an up and down running connecting plate and a pneumatic clamp, the fixed base plate is installed on the column, the servo motor is installed on the fixed base plate, the running screw is installed on the output end of the servo motor, the up and down running slide rail is installed on the side of the running screw and is arranged parallel to the running screw, the up and down running slider can be slidably installed on the up and down running slide rail, the up and down running connecting plate is arranged in an "L" shape and is installed on the up and down running slider, the pneumatic clamp is installed on the up and down running connecting plate, and the clamping block is installed on the pneumatic clamp; a pair of the clamping blocks are relatively arranged for clamping the plastic film.

[0007] As a preferred solution of the present invention, the closing component includes a clamping cylinder fixed base plate, a closing cylinder, a cylinder front end connecting block, a closing slider, a closing slide rail and a clamping hot cutting component; the closing cylinder is installed on the clamping cylinder fixed base plate, the cylinder front end connecting block is installed on the output end of the closing cylinder, and an "L"-shaped closing connecting plate is also installed on the cylinder front end connecting block, the closing slide rail is installed on the back of the clamping cylinder fixed base plate, the closing slider can be slidably installed on the closing slide rail, and the clamping hot cutting component is installed on the closing slider.

[0008] As a preferred solution of the present invention, the closing and cutting cylinder is a bidirectional cylinder, and correspondingly, the cylinder front end connecting block, the clamping and hot cutting component and the closing and cutting connecting plate are all a pair, and a pair of the clamping and hot cutting components are located on both sides of the plastic film and are used to cut the plastic film.

[0009] As a preferred solution of the present invention, the clamping cylinder fixed bottom plate is provided with two travel grooves, and the engaging connecting plate is installed on the front end connecting block of the cylinder and is located in the travel grooves.

[0010] As a preferred solution of the present invention, the clamping cylinder fixing base plate body is arranged in an "L" shape, and a flat base plate connecting portion is formed on the side of the clamping cylinder fixing base plate, and the base plate connecting portion is used to be installed on the top of the column.

[0011] As a preferred solution of the present invention, the clamping and hot cutting assembly includes a pair of clamping and hot cutting base plates that are arranged opposite to each other, and the clamping and hot cutting knife is installed on the clamping and hot cutting base plates.

[0012] As a preferred solution of the present invention, an auxiliary hot cutting mechanism is also installed on the clamping hot cutting base plate located above the clamping hot cutting knife, and the auxiliary hot cutting mechanism includes a clamping block for hot cutting, and the clamping block for hot cutting is installed on the clamping hot cutting base plate through a hot cutting sliding bearing and a hot cutting sliding shaft.

[0013] As a preferred solution of the present invention, the auxiliary hot cutting mechanism further includes an elastic member for hot cutting, a groove is formed on the side of the clamping hot cutting bottom plate, and the elastic member for hot cutting passes through the groove and abuts against the hot cutting clamping block.

[0014] As a preferred solution of the present invention, the rotating assembly also includes a support pad, a support bearing and a support shaft, the support pad is installed on the clamping cylinder fixed base plate, the support bearing is installed on the support pad, and the support shaft is rotatably installed between the two support bearings and passes through the rotating roller.

[0015] Compared with the prior art, the beneficial effects of the present invention are: an automatic stretching plastic film cutting device in the present invention has a compact and ingenious structure. By arranging upper and lower running components that can adjust the length of the plastic film and can be stretched, and then cutting the plastic film through the cutting component, the discharge length of the plastic film can be automatically controlled, and the probability of material waste can be reduced. At the same time, the operating efficiency can be improved, and the user experience can be enhanced, which is conducive to the promotion and application of the above-mentioned automatic stretching plastic film cutting device in the field of packaging technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an automatic stretching plastic film cutting device in an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the up and down running components in an embodiment of the present invention; Figure 3 is a schematic structural diagram of a fitting assembly in an embodiment of the present invention; Figure 4 2 is a schematic diagram of the structure of the clamping cylinder fixing base plate in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a clamping hot cutting assembly in an embodiment of the present invention; Figure 6 is a schematic diagram of the structure of clamping the hot-cut bottom plate in an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the rotating assembly in the embodiment of the present invention.

[0017] Figure numerals: 1, frame; 1-1, column; 1-2, column bottom plate; 2, up and down running assembly; 2-1, fixed bottom plate; 2-2, servo motor; 2-3, running screw; 2-4, up and down running slide rail; 2-5, up and down running slider; 2-6, up and down running connecting plate; 2-7, pneumatic clamp; 2-8, clamping block; 3, closing assembly; 3-1, clamping cylinder fixed bottom plate; 3-1-1, travel groove; 3-1-2, bottom plate connecting part; 3-2, closing cylinder; 3-3, cylinder front end connection Block; 3-4, cutting slider; 3-5, cutting rail; 3-6, clamping hot cutting assembly; 3-6-1, clamping hot cutting base plate; 3-6-1-1, slotting; 3-6-2, hot cutting sliding bearing; 3-6-3, hot cutting sliding shaft; 3-6-4, elastic part for hot cutting; 3-6-5, clamping block for hot cutting; 3-6-6, clamping hot cutting knife; 3-7, cutting connecting plate; 4, rotating assembly; 4-1, supporting pad; 4-2, supporting bearing; 4-3, supporting shaft; 4-4, rotating roller; 5, plastic film. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] Example: Figures 1 to 7As shown, an automatic stretching plastic film cutting device is mainly composed of a frame 1, an upper and lower running component 2, a cutting component 3 and a rotating component 4, and the upper and lower running component 2, the cutting component 3 and the rotating component 4 are all installed on the frame 1. The upper and lower running component 2 has a clamping block 2-8, which clamps the plastic film 5, and then the upper and lower running component 2 drives the clamping block 2-8 to change its position, so that the length of the plastic film 5 can be adjusted and the plastic film 5 can be stretched in the process, which is convenient for the subsequent cutting component 3 to cut the plastic film 5. The cutting component 3 has a clamping hot cutting knife 3-6-6 for cutting the plastic film 5. The rotating component 4 can cooperate with the upper and lower running component 2 to adjust the length of the plastic film 5, so as to realize automatic control of the length of the plastic film 5. In order to simplify the structure of the plastic film cutting device, in this embodiment, the upper and lower running components 2 are installed on the side of the frame 1, the cutting components 3 and the rotating components 4 are both installed on the top of the frame 1, and the plastic film 5 is wound around the rotating roller 4-4 of the rotating component 4.

[0022] Specifically, the above-mentioned frame 1 is simplified into a pair of relatively arranged columns 1-1, and the column 1-1 can be made of a square tube, which has high bending and torsion resistance and can provide good structural stability. The cross-sectional characteristics of the square tube make it have a high load-bearing capacity, which is suitable for columns 1-1 that bear a large load, thereby ensuring the stability of the overall device structure. In order to further enhance the stability and facilitate fixing the column 1-1 to the ground or other planes, a column base plate 1-2 can also be set at the bottom of the column 1-1 by welding or the like, and the area of ​​the column base plate 1-2 is larger than the area of ​​the column 1-1. The column base plate 1-2 can be fixed to the ground by fixing bolts and other fixing parts, thereby achieving the fixation of the position of the column 1-1 and ensuring the stability of the column 1-1.

[0023] In order to ensure the operation effect and avoid the plastic film 5 from tilting during length adjustment, which may affect the cutting effect of the plastic film 5, in this embodiment, the above-mentioned upper and lower running components 2 are divided into two groups, and the two groups of the above-mentioned upper and lower running components 2 are respectively installed on the two above-mentioned columns 1-1. Each group of the above-mentioned up and down running components 2 is respectively composed of a fixed base plate 2-1, a servo motor 2-2, a running screw 2-3, an up and down running slide rail 2-4, an up and down running slider 2-5, an up and down running connecting plate 2-6 and a pneumatic clamp 2-7. The above-mentioned fixed base plate 2-1 is installed on the above-mentioned column 1-1, the above-mentioned servo motor 2-2 is installed on the above-mentioned fixed base plate 2-1, the above-mentioned running screw 2-3 is installed on the output end of the above-mentioned servo motor 2-2, the above-mentioned up and down running slide rail 2-4 is installed on the side of the above-mentioned running screw 2-3 and is arranged parallel to the above-mentioned running screw 2-3, the above-mentioned up and down running slider 2-5 can be slidably installed on the above-mentioned up and down running slide rail 2-4, the above-mentioned up and down running connecting plate 2-6 is arranged in an "L" shape and is installed on the above-mentioned up and down running slider 2-5, the above-mentioned pneumatic clamp 2-7 is installed on the above-mentioned up and down running connecting plate 2-6, and the above-mentioned clamping block 2-8 is installed on the above-mentioned pneumatic clamp 2-7; a pair of the above-mentioned clamping blocks 2-8 are relatively arranged for clamping the above-mentioned plastic film 5. The specific action process is as follows: the servo motor 2-2 starts and drives the running screw 2-3 to rotate, and then drives the upper and lower running sliders 2-5 to move along the length direction of the upper and lower running slide rails 2-4 through the upper and lower running connecting plates 2-6, and then drives the above-mentioned pneumatic clamps 2-7 to move up and down, and then drives the clamping block 8 to produce an opening and closing movement through the above-mentioned pneumatic clamps 2-7, so as to achieve the stretching and length adjustment of the plastic film 5.

[0024] The closing component 3 in this embodiment is mainly composed of a clamping cylinder fixed base plate 3-1, a closing cylinder 3-2, a cylinder front end connecting block 3-3, a closing slide 3-4, a closing slide rail 3-5 and a clamping hot cutting component 3-6. The closing cylinder 3-2 is installed on the clamping cylinder fixed base plate 3-1, the cylinder front end connecting block 3-3 is installed on the output end of the closing cylinder 3-2, and an "L"-shaped closing connecting plate 3-7 is also installed on the cylinder front end connecting block 3-3. The closing slide rail 3-5 is installed on the back of the clamping cylinder fixed base plate 3-1, the closing slide 3-4 can be slidably installed on the closing slide rail 3-5, and the clamping hot cutting component 3-6 is installed on the closing slide 3-4. The closing cylinder 3-2 drives the cylinder front end connection block 3-3, and the cylinder front end connection block 3-3 drives the closing slide 3-4 to move on the closing slide rail 3-5, thereby pushing the clamping hot cutting component 3-6 to produce an opening and closing movement. In order to ensure the cutting effect on the plastic film 5, the closing cylinder 3-2 in this embodiment is a bidirectional cylinder, and correspondingly, the cylinder front end connection block 3-3, the clamping hot cutting component 3-6 and the closing connection plate 3-7 are all a pair, and the pair of the clamping hot cutting components 3-6 are located on both sides of the plastic film 5 and are used to cut the plastic film 5. In order to make the overall structure of the device compact and thus reduce the space occupied, in this embodiment, two travel grooves 3-1-1 are opened on the clamping cylinder fixed bottom plate 3-1, and the closing connection plate 3-7 is installed on the cylinder front end connection block 3-3 and is located in the travel groove 3-1-1. When the closing and cutting connecting plate 3-7 is located at the innermost position of the travel groove 3-1-1, the distance between the two sets of the above-mentioned clamping and hot cutting components 3-6 is the smallest, thereby realizing the cutting of the plastic film 5; when cutting is not required, the closing and cutting connecting plate 3-7 can be adjusted to a position close to the notch position of the travel groove 3-1-1, thereby preventing the occurrence of miscutting and the like and avoiding material waste.

[0025] In order to further simplify the structure of the device and simplify the installation steps, in this embodiment, the main body of the clamping cylinder fixing base plate 3-1 is designed to be "L" shaped, and the side of the clamping cylinder fixing base plate 3-1 is formed with a flat base plate connecting portion 3-1-2, and the base plate connecting portion 3-1-2 is used to be installed on the top of the above-mentioned column 1-1.

[0026] The clamping hot cutting assembly 3-6 comprises a pair of clamping hot cutting bottom plates 3-6-1 arranged opposite to each other, the clamping hot cutting knife 3-6-6 is mounted on the clamping hot cutting bottom plates 3-6-1, and the clamping hot cutting bottom plates 3-6-1 provide a stable mounting platform for the clamping hot cutting knife 3-6-6 to ensure stability and accuracy during the cutting process. In order to increase the clamping function of the clamping hot cutting bottom plates 3-6-1, so as to firmly clamp the plastic film 5 and prevent the plastic film 5 from moving during the cutting process, in this embodiment, an auxiliary hot cutting mechanism is also mounted on the clamping hot cutting bottom plates 3-6-1 located above the clamping hot cutting knife 3-6-6, and the auxiliary hot cutting mechanism comprises a hot cutting clamping block 3-6-5, and the hot cutting clamping block 3-6-5 is mounted on the clamping hot cutting bottom plates 3-6-1 through a hot cutting sliding bearing 3-6-2 and a hot cutting sliding shaft 3-6-3. Automated clamping and hot cutting operations can reduce manual intervention and improve production efficiency and processing speed. Specifically, the auxiliary hot cutting mechanism also includes a hot cutting elastic member 3-6-4, a slot 3-6-1-1 is formed on the side of the clamping hot cutting bottom plate 3-6-1, and the hot cutting elastic member 3-6-4 passes through the slot 3-6-1-1 and abuts against the back of the hot cutting clamping block 3-6-5.

[0027] The specific action process of the above-mentioned clamping hot cutting component 3-6 is: the clamping hot cutting base plate 3-6-1 drives the clamping hot cutting knife 3-6-6 to move under the drive of the two-way cylinder, and at the same time, the above-mentioned clamping hot cutting base plate 3-6-1 drives the above-mentioned hot cutting elastic member 3-6-4, and the above-mentioned hot cutting elastic member 3-6-4 can be a spring. The above-mentioned hot cutting elastic member 3-6-4 softly drives the above-mentioned hot cutting clamping block 3-6-5. Therefore, after the hot cutting clamping block 3-6-5 clamps on the plastic film 5, the cutting edge of the clamping hot cutting knife 3-6-6 directly contacts the plastic film 5 and cuts the plastic film 5.

[0028] The rotating assembly 4 in this embodiment also includes a supporting block 4-1, a supporting bearing 4-2 and a supporting shaft 4-3. The supporting block 4-1 is installed on the clamping cylinder fixed base plate 3-1, the supporting bearing 4-2 is installed on the supporting block 4-1, and the supporting shaft 4-3 can be rotatably installed between the two supporting bearings 4-2 and pass through the rotating roller 4-4, wherein the plastic film 5 can also be directly wrapped around the outer surface of the supporting shaft 4-3, that is, there is no need to set the rotating roller 4-4, which can further reduce the production cost and leave a larger accommodating space for the plastic film 5.

[0029] The clamping block 2-8 and the pneumatic clamping jaw 2-7 in this embodiment are driven by the upper and lower running components 2 to move to the slot 3-6-1-1, and the pneumatic clamping jaw 2-7 drives the clamping block 2-8 to clamp the plastic film 5. When the closing and cutting component 3 is cut under the action of the closing and cutting cylinder 3-2, the plastic film 5 can fall off. Subsequently, the closing and cutting cylinder 3-2 drives the hot cutting clamping block 3-6-5 in the closing and cutting component 3 to separate, leaving space and allowing the clamping block 2-8 to be located in the space. The clamping block 2-8 re-clamps the plastic film 5 and stretches it downward until it is stretched to a predetermined size, and cuts it again, and the above steps are repeated repeatedly.

[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0031] Although this article uses more reference numerals in the figure: 1, frame; 1-1, column; 1-2, column bottom plate; 2, up and down running assembly; 2-1, fixed bottom plate; 2-2, servo motor; 2-3, running screw; 2-4, up and down running slide rail; 2-5, up and down running slider; 2-6, up and down running connecting plate; 2-7, pneumatic clamp; 2-8, clamping block; 3, cutting assembly; 3-1, clamping cylinder fixed bottom plate; 3-1-1, travel groove; 3-1-2, bottom plate connecting part; 3-2, cutting cylinder; 3-3, cylinder front end connecting block; 3- 4, cutting slider; 3-5, cutting rail; 3-6, clamping hot cutting assembly; 3-6-1, clamping hot cutting bottom plate; 3-6-1-1, slotting; 3-6-2, hot cutting sliding bearing; 3-6-3, hot cutting sliding shaft; 3-6-4, hot cutting elastic member; 3-6-5, hot cutting clamping block; 3-6-6, clamping hot cutting knife; 3-7, cutting connecting plate; 4, rotating assembly; 4-1, supporting pad; 4-2, supporting bearing; 4-3, supporting shaft; 4-4, rotating roller; 5, plastic film and other terms, but does not exclude the possibility of using other terms. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. An automatic stretch plastic film cutting device, characterized in that: The invention comprises a frame (1), an upper and lower running assembly (2) having a clamping block (2-8) and capable of adjusting the length of a plastic film (5) and stretching the plastic film (5), a cutting assembly (3) having a clamping hot cutting knife (3-6-6) for cutting the plastic film (5), and a rotating assembly (4) for rotating and cooperating with the upper and lower running assembly (2) to adjust the length of the plastic film (5), wherein the upper and lower running assembly (2) is mounted on the side of the frame (1), the cutting assembly (3) and the rotating assembly (4) are both mounted on the top of the frame (1), and the plastic film (5) is wound around a rotating roller (4-4) of the rotating assembly (4).

2. The automatic stretch plastic film cutting device according to claim 1, characterized in that: The frame (1) comprises a pair of columns (1-1) arranged opposite to each other; the upper and lower running components (2) are divided into two groups, each group of the upper and lower running components (2) further comprises a fixed base plate (2-1), a servo motor (2-2), a running screw (2-3), an upper and lower running slide rail (2-4), an upper and lower running slider (2-5), an upper and lower running connecting plate (2-6) and a pneumatic clamp (2-7); the fixed base plate (2-1) is mounted on the column (1-1), the servo motor (2-2) is mounted on the fixed base plate (2-1), and the running screw (2-3) is mounted on the servo motor (2-2). At the output end, the upper and lower running slide rails (2-4) are mounted on the side of the running screw (2-3) and are arranged parallel to the running screw (2-3); the upper and lower running sliders (2-5) are slidably mounted on the upper and lower running slide rails (2-4); the upper and lower running connecting plates (2-6) are arranged in an "L" shape and are mounted on the upper and lower running sliders (2-5); the pneumatic clamping jaws (2-7) are mounted on the upper and lower running connecting plates (2-6); and the clamping blocks (2-8) are mounted on the pneumatic clamping jaws (2-7); a pair of the clamping blocks (2-8) are arranged opposite to each other and are used to clamp the plastic film (5).

3. The automatic stretch plastic film cutting device according to claim 2, characterized in that: The closing assembly (3) comprises a clamping cylinder fixed base plate (3-1), a closing cylinder (3-2), a cylinder front end connection block (3-3), a closing slide block (3-4), a closing slide rail (3-5) and a clamping hot-cut assembly (3-6); the closing cylinder (3-2) is mounted on the clamping cylinder fixed base plate (3-1), the cylinder front end connection block (3-3) is mounted on the output end of the closing cylinder (3-2), an "L"-shaped closing connection plate (3-7) is also mounted on the cylinder front end connection block (3-3), the closing slide rail (3-5) is mounted on the back of the clamping cylinder fixed base plate (3-1), the closing slide block (3-4) can be slidably mounted on the closing slide rail (3-5), and the clamping hot-cut assembly (3-6) is mounted on the closing slide block (3-4).

4. The automatic stretch plastic film cutting device according to claim 3, characterized in that: The closing and cutting cylinder (3-2) is a bidirectional cylinder. Correspondingly, the cylinder front end connection block (3-3), the clamping and hot cutting component (3-6) and the closing and cutting connection plate (3-7) are all a pair. The pair of clamping and hot cutting components (3-6) are located on both sides of the plastic film (5) and are used to cut the plastic film (5).

5. The automatic stretch plastic film cutting device according to claim 4, characterized in that: The clamping cylinder fixed base plate (3-1) is provided with two travel grooves (3-1-1), and the cut-out connecting plate (3-7) is mounted on the cylinder front end connecting block (3-3) and is located in the travel grooves (3-1-1).

6. The automatic stretch plastic film cutting device according to claim 5, characterized in that: The main body of the clamping cylinder fixed base plate (3-1) is arranged in an "L" shape, and a flat base plate connecting portion (3-1-2) is formed on the side of the clamping cylinder fixed base plate (3-1), and the base plate connecting portion (3-1-2) is used to be installed on the top of the column (1-1).

7. The automatic stretch plastic film cutting device according to claim 6, characterized in that: The clamping hot cutting assembly (3-6) comprises a pair of clamping hot cutting bottom plates (3-6-1) arranged opposite to each other, and the clamping hot cutting knife (3-6-6) is mounted on the clamping hot cutting bottom plates (3-6-1).

8. The automatic stretch plastic film cutting device according to claim 7, characterized in that: An auxiliary hot cutting mechanism is also installed on the clamping hot cutting base plate (3-6-1) located above the clamping hot cutting knife (3-6-6), and the auxiliary hot cutting mechanism comprises a hot cutting clamping block (3-6-5). The hot cutting clamping block (3-6-5) is installed on the clamping hot cutting base plate (3-6-1) via a hot cutting sliding bearing (3-6-2) and a hot cutting sliding shaft (3-6-3).

9. The automatic stretch plastic film cutting device according to claim 8, characterized in that: The auxiliary hot cutting mechanism also includes a hot cutting elastic member (3-6-4), a slot (3-6-1-1) is formed on the side of the clamping hot cutting bottom plate (3-6-1), and the hot cutting elastic member (3-6-4) passes through the slot (3-6-1-1) and abuts against the hot cutting clamping block (3-6-5).

10. The automatic stretch plastic film cutting device according to claim 9, characterized in that: The rotating assembly (4) further comprises a supporting pad (4-1), a supporting bearing (4-2) and a supporting shaft (4-3); the supporting pad (4-1) is mounted on the clamping cylinder fixed base plate (3-1); the supporting bearing (4-2) is mounted on the supporting pad (4-1); and the supporting shaft (4-3) is rotatably mounted between the two supporting bearings (4-2) and passes through the rotating roller (4-4).

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