Film cutting device of film blowing machine for plastic package production

Abstract

The utility model discloses a film cutting device of a film blowing machine for plastic package production, which relates to the technical field of film cutting devices and comprises a frame body and a fixed table. The frame is fixedly connected to the upper end of the fixing table. The frame body comprises an end part, a middle part and a bottom part, and the end part is provided with a first guide roller and a second guide roller; a suspension frame is arranged on one side of the end part, an air cylinder is arranged on the suspension frame, the movable end of the air cylinder is fixedly connected with a placing frame, and a blade is fixedly connected to the placing frame; a groove plate is fixedly arranged in the middle, and a winding roller is rotationally connected to the bottom. And a slitting part is arranged on one side of the winding roller. According to the utility model, the rack and the slitting component are arranged; and the first motor is started, and the winding roller winds the plastic film. The winding has specifications such as weight, size and the like; when winding reaches a certain specification, the air cylinder is started, and the air cylinder drives the blade to cut the plastic film; and when slitting is needed, the slitting component is started, and the rolled plastic film is slit by the slitting component to be in a preset size.

Description

Technical Field

[0001] The utility model relates to the technical field of film cutting devices, and particularly relates to a film cutting device for a blown film machine used in plastic packaging production. Background Technique

[0002] A blown film machine is a device widely used in the plastic processing industry. Its main function is to heat and melt plastic particles and blow them into films through specific technological steps. This device has a wide range of applications in modern packaging, printing, food, medical and other industries, playing an important role in improving production efficiency, reducing costs, and improving product quality. In a blown film machine, plastic particles are first fed into a heating zone and melted into a liquid state by high temperature. Then, the liquid plastic is introduced into an annular mold, and there is an air inlet in the mold. When the liquid plastic flows and accumulates to a certain thickness in the mold, the air entering through the air inlet blows up the liquid plastic to form a film bubble. This film bubble is then stretched and cooled by a traction device and finally solidified into the required film.

[0003] After the blown film machine produces the finished film, film cutting is required. Film cutting is an important link in the production process of the blown film machine. The purpose is to cut the continuously produced plastic film into the required length and width according to product needs. The size and shape of the cut film can be customized according to the specific requirements of the product, such as making plastic bags, packaging materials, decorative films, etc. Some of the produced films also need to be slit to obtain more refined products. Slitting requires the use of a slitter to complete, which is time-consuming and laborious. There is no device in the prior art that can perform two cutting methods simultaneously. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a film cutting device for a blown film machine used in plastic packaging production to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A film cutting device for a blown film machine used in plastic packaging production includes a frame body and a fixed table; the frame body is fixedly connected to the upper end of the fixed table; the frame body includes an end part, a middle part and a bottom part. The end part is provided with a first guide roller and a second guide roller, and the first guide roller and the second guide roller are rotationally connected to the end part; a suspension is provided on one side of the end part, a cylinder is provided on the suspension, a placement frame is fixedly connected to the movable end of the cylinder, and a blade is fixedly connected to the placement frame; a groove plate is fixedly provided on the middle part, a cutting groove is fixedly provided on the groove plate, a cutting roller is provided above the cutting groove, and the cutting roller is rotationally connected to the middle part; a winding roller is rotationally connected to the bottom part, a first motor is provided on one side of the bottom part, and the transmission shaft of the first motor is fixedly connected to the rotating shaft of the winding roller; a slitting component is provided on one side of the winding roller, and the slitting component can slit the plastic film wound on the winding roller.

[0007] After the blown film machine produces the plastic film, the plastic film enters between the first guide roller and the second guide roller, then passes through between the cutting rollers, and finally is fixed on the winding roller. Start the first motor, and the first motor drives the winding roller to rotate, and the winding roller winds the plastic film. The winding has specifications such as weight, size, etc.; when the winding reaches a certain specification, start the cylinder, and the cylinder drives the blade to cut the plastic film; when slitting is required, start the slitting component, and the slitting component slits the wound plastic film into a preset size.

[0008] A further improvement of the technical solution of the present utility model lies in that: a tension roller is provided on one side of the groove plate, both ends of the tension wheel are fixedly connected to the bearings, a tension sensor is provided below the bearings, and an electric push rod is fixedly provided below the bearings, and the movable end of the electric push rod is fixedly connected to the bearings.

[0009] Adopting the above technical solution, in this solution, the tension of the plastic film is realized by adjusting the extension length of the electric push rod, so as to prevent affecting the quality during cutting.

[0010] A further improvement of the technical solution of the present utility model lies in that: the slitting component includes a fixed rod, the fixed rod is rotatably connected to the bottom, a second motor is provided on one side of the fixed rod, and the transmission shaft of the second motor is fixedly connected to the fixed rod; a clamping strip is fixedly provided on the fixed rod; a plurality of tool holders are sleeved on the fixed rod, a slitting knife is fixedly provided on the tool holder, and the tool holder is slidably connected to the fixed rod.

[0011] Adopting the above technical solution, in this solution, by arranging the tool holder and the fixed rod, when slitting is required, start the second motor, the second motor drives the fixed rod to rotate, and then drives the slitting knife on the tool holder to rotate, and the slitting knife can quickly slit the plastic film when it contacts the plastic film.

[0012] A further improvement of the technical solution of the present utility model lies in that: the tool holder includes a fixed ring and a fixed box, a knife groove is provided on the fixed box for placing the slitting knife, a fixing screw hole is provided on one side of the knife box, and the slitting knife is fixed through the fixing screw hole; the fixed ring is provided on the other side of the knife box and is fixedly connected to the knife box, a convex block is provided on the fixed ring, a screw hole is provided on the convex block, and a screw rod is provided between the convex blocks.

[0013] Adopting the above technical solution, in this solution, by arranging the convex block and the screw rod, when it is necessary to fix the tool holder, rotate the screw rod, the screw rod rotates to drive the two convex blocks to approach each other, and then the fixed ring is contracted, realizing the fixation between the tool holder and the fixed rod.

[0014] A further improvement of the technical solution of the present utility model lies in that: the second motor is slidably connected to the bottom; a chute and a slider are provided on one side of the bottom away from the second motor, and the chute and the slider are slidably connected; the slider is fixedly connected to the fixed rod, and the slider is slidably connected to the chute; a fixed rod and a lead screw are fixedly provided on the chute, the lead screw is threadedly connected to the slider, a servo motor is provided on one side of the chute, and the transmission shaft of the servo motor is fixedly connected to the lead screw.

[0015] With the above technical solution, the radius of the slitting knife in this solution is fixed, and the total radius of the plastic film wound on the winding roller may be greater than the radius of the slitting knife. In this case, the slitting knife cannot completely slit the wound plastic film, causing damage to the product; by setting the slider and the lead screw, starting the servo motor, driving the slider to move through the lead screw and then driving the slitting knife to move horizontally, the servo motor can also well control the moving distance of the slider, making the slitting more accurate and smooth.

[0016] A further improvement of the technical solution of the present utility model lies in that: a scale for measuring distance is provided on the clamping strip.

[0017] With the above technical solution, when slitting, it is necessary to adjust the position of the tool holder according to the slitting size. By setting the scale, it is more convenient for us to determine the position of the tool holder, improving the work efficiency.

[0018] A further improvement of the technical solution of the present utility model lies in that: a notch is provided at the sliding connection between the fixed ring and the clamping strip, strong magnets are provided on both sides of the notch, and a spring is fixedly provided between one side of the strong magnet and the side surface of the notch; a pull handle is provided on one side of the other strong magnet and is slidably connected to the groove surface.

[0019] With the above technical solution, by setting the strong magnets, when the sides of the two magnets face each other, the magnets will attract each other at both ends of the clamping strip under the action of the magnetic force. Under the action of the strong magnetic force, the friction between the strong magnet and the clamping strip becomes larger, preventing the tool holder from moving left and right; when the tool holder needs to be moved, by pulling the pull handle, the magnetic force between the strong magnets is weakened, and the other strong magnet is pulled back under the action of the spring force, and then we can freely move the tool holder; it is simple and convenient.

[0020] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model compared with the prior art is:

[0021] 1. The present utility model provides a film cutting device for a film blowing machine used in plastic packaging production. By setting up a mounting rack and a slitting component; starting the first motor, the first motor drives the winding roller to rotate, and the winding roller winds the plastic film. The winding has specifications such as weight, size, etc.; when the winding reaches a certain specification, by starting the cylinder, the cylinder drives the blade to cut the plastic film; when slitting is required, start the slitting component, and the slitting component slits the wound plastic film into a preset size.

[0022] 2. The present utility model provides a film cutting device for a film blowing machine used in plastic packaging production. Adjust the extension length of the electric push rod to achieve the tensioning of the plastic film, preventing the quality from being affected during cutting.

[0023] 3. The present utility model provides a film cutting device for a film blowing machine used in plastic packaging production. By setting up strong magnets, when the sides of the two magnets face each other, under the action of magnetic force, the magnets will attract each other at both ends of the clamping strip. Under the action of strong magnetic force, the friction force between the strong magnet and the clamping strip becomes larger, preventing the tool holder from moving left and right; when the tool holder needs to be moved, by pulling the pull handle, the magnetic force between the strong magnets is weakened, and the strong magnet on the other side is pulled back under the action of the spring force, and then we can freely move the tool holder; it is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present utility model with reference to the drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 2 It is a schematic diagram of the overall rear view structure of the present utility model;

[0027] Figure 3 It is a schematic diagram of the overall side view structure of the present utility model;

[0028] Figure 4 It is a schematic diagram of the first structure of the tool holder of the present utility model;

[0029] Figure 5 It is a schematic diagram of the second structure of the tool holder of the present utility model;

[0030] In the figure: 1, frame body; 2, fixed table; 3, end part; 4, middle part; 5, bottom part; 6, first guide roller; 7, second guide roller; 8, suspension; 9, cylinder; 10, blade; 11, groove plate; 13, cutting roller; 14, winding roller; 15, tensioning roller; 16, electric push rod; 17, fixed rod; 18, clamping strip; 19, tool holder; 20, slitting knife; 21, fixed ring; 22, fixed box; 23, screw rod; 24, strong magnet; 25, scale; 26, lead screw; 27, servo motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following further elaborates on the present utility model in conjunction with the embodiments:

[0032] Embodiment 1

[0033] As Figures 1-5 shown, the present utility model provides a film cutting device for a plastic packaging production blow molding machine, including a frame body 1 and a fixed table 2; the frame body 1 is fixedly connected to the upper end of the fixed table 2; the frame body 1 includes an end portion 3, a middle portion 4 and a bottom portion 5, the end portion 3 is provided with a first guide roller 6 and a second guide roller 7, and the first guide roller 6 and the second guide roller 7 are rotatably connected to the end portion 3; a suspension 8 is provided on one side of the end portion 3, a cylinder 9 is provided on the suspension 8, a placement frame is fixedly connected to the movable end of the cylinder 9, and a blade 10 is fixedly connected to the placement frame; a groove plate 11 is fixedly provided on the middle portion 4, a cutting groove is fixedly provided on the groove plate 11, a cutting roller 13 is provided above the cutting groove, and the cutting roller 13 is rotatably connected to the middle portion 4; a winding roller 14 is rotatably connected to the bottom portion 5, a first motor is provided on one side of the bottom portion 5, and the transmission shaft of the first motor is fixedly connected to the rotating shaft of the winding roller 14; a slitting component is provided on one side of the winding roller 14, and the slitting component can slit the plastic film wound on the winding roller 14.

[0034] In this embodiment, when the blow molding machine produces a plastic film, the plastic film enters between the first guide roller 6 and the second guide roller 7, then passes through between the cutting rollers 13, and finally is fixed on the winding roller 14. The first motor is started, and the first motor drives the winding roller 14 to rotate, and the winding roller 14 winds the plastic film. The winding has specifications such as weight, size, etc.; when the winding reaches a certain specification, the cylinder 9 is started, and the cylinder 9 drives the blade 10 to cut the plastic film; when slitting is required, the slitting component is started, and the slitting component slits the wound plastic film into a preset size.

[0035] Embodiment 2

[0036] As Figures 1-5 shown, on the basis of Embodiment 1, the present utility model provides a technical solution: Preferably, a tension roller 15 is provided on one side of the groove plate 11, both ends of the tension wheel are fixedly connected to bearings, a tension sensor is provided below the bearings, and an electric push rod 16 is fixedly provided below the bearings, and the movable end of the electric push rod 16 is fixedly connected to the bearings.

[0037] In this embodiment, the tension sensor is installed below the bearing of the tension detection roller, converts the detected film tension into an electrical signal, sends it to the controller, calculates after comparing with the originally set tension signal, and then inputs it to the control end of the electric push rod 16, and realizes the tensioning of the plastic film by adjusting the extending length of the electric push rod 16 to prevent affecting the quality during cutting.

[0038] Embodiment 3

[0039] As Figures 4-5 shown, on the basis of Embodiment 1, the present utility model provides a technical solution: Preferably, the slitting component includes a fixed rod 17, the fixed rod 17 is rotatably connected to the bottom 5, a second motor is provided on one side of the fixed rod 17, and a fixed connection is provided between the transmission shaft of the second motor and the fixed rod 17; a clamping strip 18 is fixedly provided on the fixed rod 17; a plurality of tool holders 19 are sleeved on the fixed rod 17, a slitting knife 20 is fixedly provided on the tool holder 19, and the tool holder 19 is slidably connected to the fixed rod 17.

[0040] In this embodiment, by providing the tool holder 19 and the fixed rod 17, when slitting is required, by starting the second motor, the second motor drives the fixed rod 17 to rotate, thereby driving the slitting knife 20 on the tool holder 19 to rotate. When the slitting knife 20 contacts the plastic film, it can quickly slit it.

[0041] The tool holder 19 includes a fixed ring 21 and a fixed box 22. A knife groove is provided on the fixed box 22 for placing the slitting knife 20. A fixed screw hole is provided on one side of the knife box for fixing the slitting knife 20 through the fixed screw hole; the fixed ring 21 is provided on the other side of the knife box and is fixedly connected to the knife box. A convex block is provided on the fixed ring 21, a screw hole is provided on the convex block, and a screw rod 23 is provided between the convex blocks.

[0042] By providing the convex block and the screw rod 23, when it is necessary to fix the tool holder 19, by rotating the screw rod 23, the screw rod 23 rotates to drive the two convex blocks to approach each other, thereby causing the fixed ring 21 to contract, realizing the fixation between the tool holder 19 and the fixed rod 17.

[0043] Preferably, the second motor is slidably connected to the bottom 5; a chute and a slider are provided on the side of the bottom 5 away from the second motor, and the chute and the slider are slidably connected; the slider is fixedly connected to the fixed rod 17, and the slider is slidably connected to the chute; a fixed rod 17 and a lead screw 26 are fixedly provided on the chute, the lead screw 26 is threadedly connected to the slider, and a servo motor 27 is provided on one side of the chute, and a fixed connection is provided between the transmission shaft of the servo motor 27 and the lead screw 26.

[0044] The radius of the slitting knife 20 is fixed, and the total radius of the plastic film wound on the winding roller 14 may be greater than the radius of the slitting knife 20. In this case, the slitting knife 20 cannot completely slit the wound plastic film, causing damage to the product; by providing the slider and the lead screw 26, starting the servo motor 27, the lead screw 26 drives the slider to move, thereby driving the slitting knife 20 to move horizontally. The servo motor 27 can also well control the moving distance of the slider, making the slitting more accurate and smooth.

[0045] A scale 25 for measuring distance is provided on the clamping strip 18.

[0046] When performing slitting, it is necessary to adjust the position of the tool holder 19 according to the slitting size. By setting the scale 25, it is more convenient for us to determine the position of the tool holder 19, improving work efficiency.

[0047] Embodiment 4

[0048] As Figure 4 shown, on the basis of Embodiment 1, the present utility model provides a technical solution: there is a notch at the sliding connection between the fixed ring 21 and the clamping strip 18, and strong magnets 24 are arranged on both sides of the notch. A spring is fixedly arranged between one side of the strong magnet 24 and the side surface of the notch; a pull handle is arranged on one side of the other strong magnet 24 and is slidably connected to the groove surface.

[0049] By setting the strong magnets 24, when the sides of the two magnets face each other, the magnets will attract each other at both ends of the clamping strip 18 under the action of magnetic force. Under the action of strong magnetic force, the friction force between the strong magnet 24 and the clamping strip 18 becomes larger, preventing the tool holder 19 from moving left and right; when it is necessary to move the tool holder 19, by pulling the pull handle, the magnetic force between the strong magnets 24 is weakened, and the other strong magnet 24 is pulled back under the action of the spring force, and then we can freely move the tool holder 19; it is simple and convenient.

[0050] Next, specifically describe the working principle of the film cutting device of the blown film machine for plastic packaging.

[0051] As Figures 1-5 shown, when the blown film machine produces a plastic film, the plastic film enters between the first guide roller 6 and the second guide roller 7, then passes through between the cutting rollers 13, and finally is fixed on the winding roller 14. Start the first motor, and the first motor drives the winding roller 14 to rotate, and the winding roller 14 winds the plastic film. The winding has specifications such as weight, size, etc.; when the winding reaches a certain specification, by starting the cylinder 9, the cylinder 9 drives the blade 10 to cut the plastic film; when slitting is required, by starting the second motor, the second motor drives the fixed rod 17 to rotate, thereby driving the slitting knife 20 on the tool holder 19 to rotate, and the slitting knife 20 can quickly slit the plastic film when it contacts the plastic film.

[0052] The above generally describes the present utility model in detail, but on the basis of the present utility model, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, modifications or improvements made without departing from the spirit of the present utility model are within the protection scope of the present utility model.

Claims

1. A film cutting device for a film blowing machine for plastic packaging production, comprising a frame (1) and a fixing table (2); characterized in that: The frame (1) is fixedly connected to the upper end of the fixed platform (2); the frame (1) comprises an end portion (3), a middle portion (4) and a bottom portion (5); the end portion (3) is provided with a first guide roller (6) and a second guide roller (7); the first guide roller (6) and the second guide roller (7) are rotatably connected to the end portion (3); a suspension (8) is provided on one side of the end portion (3); a cylinder (9) is provided on the suspension (8); a movable end of the cylinder (9) is fixedly connected to a mounting frame, and a blade (10) is fixedly connected to the mounting frame; A groove plate (11) is fixedly provided on the middle part (4), a cutting groove is fixedly provided on the groove plate (11), a cutting roller (13) is provided above the cutting groove, and the cutting roller (13) is rotatably connected to the middle part (4); a winding roller (14) is rotatably connected to the bottom part (5), a first motor is provided on one side of the bottom part (5), and a drive shaft of the first motor is fixedly connected to a rotating shaft of the winding roller (14); a slitting component is provided on one side of the winding roller (14), and the slitting component can slit the plastic film wound up on the winding roller (14).

2. The film cutting device of the film blowing machine for plastic packaging production according to claim 1 is characterized in that: A tension roller (15) is provided on one side of the groove plate (11), and both ends of the tension roller (15) are fixedly connected to bearings. A tension sensor is provided below the bearing, and an electric push rod (16) is fixedly provided below the bearing, and a movable end of the electric push rod (16) is fixedly connected to the bearing.

3. The film cutting device of the film blowing machine for plastic packaging production according to claim 2 is characterized in that: The slitting component comprises a fixed rod (17), the fixed rod (17) being rotatably connected to the bottom (5), a second motor being provided on one side of the fixed rod (17), a drive shaft of the second motor being fixedly connected to the fixed rod (17); a clamping strip (18) being fixedly provided on the fixed rod (17); a plurality of knife holders (19) being sleeved on the fixed rod (17), a slitting knife (20) being fixedly provided on the knife holder (19), and the knife holder (19) being slidably connected to the fixed rod (17).

4. The film cutting device of the film blowing machine for plastic packaging production according to claim 3 is characterized in that: The knife holder (19) comprises a fixing ring (21) and a fixing box (22); the fixing box (22) is provided with a knife groove for placing the slitting knife (20); one side of the knife groove is provided with a fixing screw hole, and the slitting knife (20) is fixed through the fixing screw hole; the fixing ring (21) is arranged on the other side of the knife box and is fixedly connected to the knife box; the fixing ring (21) is provided with a protrusion, the protrusion is provided with a screw hole, and a screw rod (23) is provided between the protrusions.

5. The film cutting device of the film blowing machine for plastic packaging production according to claim 4, characterized in that: A notch is provided at the sliding connection between the fixing ring (21) and the clamping strip (18), strong magnets (24) are provided on both sides of the notch, a spring is fixed between the strong magnet (24) on one side and the side of the notch; a pull handle is provided on one side of the strong magnet (24) on the other side and is slidably connected to the notch surface.

6. The film cutting device of the film blowing machine for plastic packaging production according to claim 3, characterized in that: The card strip (18) is provided with a scale (25) for measuring distance.

7. The film cutting device of the film blowing machine for plastic packaging production according to claim 3, characterized in that: The second motor is slidably connected to the bottom (5); a slide groove and a slider are provided on a side of the bottom (5) away from the second motor, and the slide groove and the slider are slidably connected; the slider is fixedly connected to the fixed rod (17), and the slider is slidably connected to the slide groove; a fixed rod (17) and a screw rod (26) are fixedly provided on the slide groove, and the screw rod (26) is threadedly connected to the slider; a servo motor (27) is provided on one side of the slide groove, and a transmission shaft of the servo motor (27) is fixedly connected to the screw rod (26).

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