Plastic film pressing and cutting device

Abstract

The utility model belongs to the technical field of plastic film bag making machines, and particularly relates to a plastic film pressing and cutting device which comprises a base and a limiting frame fixedly connected to the upper surface of the base, a cutting module is installed in the limiting frame, and two flattening plates are symmetrically arranged on the surface of the cutting module. The device further comprises a clamping assembly arranged on the upper surface of the base, the clamping assembly comprises a motor installed on the rear surface of the base, an output shaft of the motor is fixedly connected with a chain wheel, and the surface of the chain wheel is connected with a chain in a meshed mode. The plastic film pressing and cutting device has the advantages that the pressing and cutting positions of the device are consistent by controlling a motor through cooperation of a screw rod and a positioning block, meanwhile, an auxiliary assembly is added, and when a plastic film passes through a flattening roller, the plastic film is flattened through the flattening roller to prevent wrinkles through cooperation of the flattening roller and a cover plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic film bag making machines, and in particular relates to a plastic film pressing and cutting device. Background Art

[0002] Plastic film, made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, used for packaging and as a coating layer. In order to conveniently use plastic film to package food, it is necessary to use a pressing and cutting device to cut the plastic film. The plastic film bag making machine can be used to make the plastic film into packaging bags. The bag making machine has a heat sealing and cold cutting device;

[0003] After checking, the publication (announcement) number: CN215945080U discloses an automatic heat-sealing and cold-cutting device for a plastic film bag-making machine. This technology discloses the following technical solutions: "including a workbench, a U-shaped frame is fixedly connected to the middle of the top outer wall of the workbench, and a hydraulic rod is fixedly connected to the middle of the outer wall of one side of the U-shaped frame"; it has the following technical effects: "it can smooth out the wrinkles, thereby improving the product quality";

[0004] However, before the operation of this pressing and cutting device, the staff needs to manually place the plastic film on the surface of the pressing and cutting device. The plastic film pressing and cutting operation is basically a batch operation. Manual placement will cause errors in the position of each plastic film, which is very likely to cause different sizes and inconvenience in use.

[0005] In order to solve the above problems, the present application proposes a plastic film pressing and cutting device. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a plastic film pressing and cutting device, which has the characteristics of making the positions of the plastic film pressed and cut consistent each time, and preventing the plastic film from having different shapes and sizes during batch production.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plastic film pressing and cutting device, comprising a base and a limit frame fixedly connected to the upper surface of the base, a cutting module is installed inside the limit frame, two paving plates are symmetrically arranged on the surface of the cutting module, and also includes a clamping assembly arranged on the upper surface of the base;

[0008] The clamping assembly includes a motor installed on the rear surface of the base, the output shaft of the motor is fixedly connected to a sprocket, and the surface of the sprocket is meshed with a chain, and the inside of the chain is symmetrically meshed with two driven wheels, and the surface of each driven wheel is fixedly connected to a screw, and the screw is rotatably connected to the base, and the surface of each screw is threadedly connected to a positioning block, and a limiting rod is provided on one side adjacent to the two positioning blocks, and two positioning rods are symmetrically fixedly connected to both ends of the limiting rod, and the two positioning rods are inserted into the inside of the two positioning blocks and rotatably connected, and two positioning shafts are symmetrically fixedly connected to the inside of the limiting rod, and two clamping plates are symmetrically slidably connected to the surface of the positioning shaft.

[0009] As a preferred embodiment of the plastic film pressing and cutting device of the utility model, adjacent surfaces of the two clamping plates are fixedly connected with rubber pads.

[0010] As a preferred plastic film cutting device of the utility model, the surface of each positioning shaft is sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the two clamps, the left surface of the upper clamp is rotatably connected to a linkage rod, and the left surface of the lower clamp is rotatably connected to a force rod, the linkage rod and the force rod are rotatably connected through a rotating shaft, and a slider is slidably connected inside the rotating shaft, and the slider passes through the front surface of the linkage rod.

[0011] As a preferred plastic film cutting device of the utility model, a rectangular groove is provided at the intersection of the linkage rod and the force rod, and the slider is composed of two rectangular structural blocks of different sizes, the smaller rectangular block is slidably connected to its bearing, and the larger rectangular block can be inserted into the rectangular grooves of the linkage rod and the force rod.

[0012] As a preferred plastic film cutting device of the utility model, a sliding rod is inserted into the interior of the positioning block on the left side, and the sliding rod is slidably connected to the positioning block on the left side, and the end of the sliding rod close to the positioning rod is fixedly connected to the first limit block and inserted into the interior of the positioning rod, and the end of the sliding rod away from the positioning rod is fixedly connected to the second limit block, and two fixing grooves are symmetrically provided inside the positioning block on the left side, and a tension spring is installed inside each of the fixing grooves, and the two ends of the tension spring are respectively fixedly connected to the second limit block and the positioning block on the left side.

[0013] As a preferred plastic film pressing and cutting device of the utility model, a torsion spring is installed inside the positioning block on the right side, and two ends of the torsion spring are respectively fixedly connected to the positioning rod on the right side and the positioning block on the right side.

[0014] As a preferred embodiment of the plastic film pressing and cutting device of the utility model, it also includes an auxiliary component arranged on the front surface of the base;

[0015] The auxiliary component includes a fixed block fixedly connected to the front surface of the base, the front surface of the fixed block is symmetrically rotatably connected to two cover plates via hinges, and each of the cover plates is rotatably connected to a flattening roller on one side facing the fixed block.

[0016] As a preferred plastic film pressing and cutting device of the utility model, one adjacent end of the two flattening rollers is lower than the opposite end, and the two flattening rollers form a V-shaped structure.

[0017] According to the plastic film pressing and cutting device of claim 1, the front surfaces of the two cover plates are fixedly connected with positioning frames, and the interiors of the two positioning frames are slidably connected with latches.

[0018] Compared with the prior art, the beneficial effects of the utility model are: a clamping component is added to the present application, and the cooperation of the screw and the positioning block therein can be utilized to control the motor so that the position of the pressing and cutting is consistent each time. At the same time, an auxiliary component is added, and the cooperation of the flattening roller and the cover plate can be utilized so that when the plastic film passes through the flattening roller, the flattening roller can press the plastic film flat to prevent wrinkles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a structural schematic diagram of the base in the utility model from the right side;

[0022] Figure 3 This is a structural schematic diagram of a vertical cross-section of a fixing block in the utility model;

[0023] Figure 4 This is a structural schematic diagram of a vertical cross-section of a positioning block in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the linkage rod and the force application rod in the utility model;

[0025] Figure 6 It is an exploded view of the linkage rod and the slider in the utility model;

[0026] Figure 7 For this utility model Figure 4 The enlarged view of point A in the middle;

[0027] Figure 8 For this utility model Figure 4 The enlarged view of point B in the middle;

[0028] Fig. 9 For this utility model Figure 1 Enlarged view of point C in the middle;

[0029] In the figure:

[0030] 1. Base; 11. Limiting frame; 12. Cutting module; 13. Paving plate;

[0031] 2. Clamping assembly; 21. Motor; 22. Chain; 23. Screw; 24. Driven wheel; 25. Positioning block; 26. Limit rod; 27. Clamp plate; 28. Positioning shaft; 29. ​​Spring; 210. First limit block; 211. Slide bar; 212. Second limit block; 213. Tension spring; 214. Positioning rod; 215. Torsion spring; 216. Link rod; 217. Force rod; 218. Slide block; 219. Fixed slot;

[0032] 3. Auxiliary components; 31. Fixed block; 32. Cover plate; 33. Flattening roller; 34. Positioning frame; 35. Latch. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example 1

[0035] like Figures 1 to 9 As shown;

[0036] A plastic film pressing and cutting device comprises a base 1 and a limit frame 11 fixedly connected to the upper surface of the base 1, a cutting module 12 is installed inside the limit frame 11, and two paving plates 13 are symmetrically arranged on the surface of the cutting module 12;

[0037] In this embodiment: After checking the public (announcement) number: CN215945080U discloses an automatic heat sealing and cold cutting device for a plastic film bag making machine, but this pressing and cutting device requires staff to manually place the plastic film on the surface of the pressing and cutting device before operation. The plastic film pressing and cutting operation is basically a batch operation. Manual placement will cause errors in the position of each plastic film, which can easily lead to different sizes and inconvenience in use. In order to solve this technical problem, a clamping component 2 and an auxiliary component 3 are added on this basis.

[0038] More specifically:

[0039] like Figures 1 to 9 As shown;

[0040] Combining the above:

[0041] In order to achieve a consistent shape and size of each cut, the plastic film cutting device further includes a clamping assembly 2 disposed on the upper surface of the base 1;

[0042] The clamping assembly 2 includes a motor 21 mounted on the rear surface of the base 1, the output shaft of the motor 21 is fixedly connected to a sprocket, the surface of the sprocket is meshed with a chain 22, the inside of the chain 22 is symmetrically meshed with two driven wheels 24, the surface of each driven wheel 24 is fixedly connected to a screw 23, the screw 23 is rotatably connected to the base 1, the surface of each screw 23 is threadedly connected to a positioning block 25, a limiting rod 26 is provided on one side adjacent to the two positioning blocks 25, and two positioning rods 214 are symmetrically fixedly connected at both ends of the limiting rod 26, the two positioning rods 214 are inserted into the inside of the two positioning blocks 25 and are rotatably connected, and the limiting rods 26 are fixedly connected to the two ends of the limiting rod 26. The interior of the positioning rod 26 is symmetrically fixedly connected with two positioning shafts 28, and the surface of the positioning shaft 28 is symmetrically slidably connected with two clamping plates 27. The adjacent sides of the two clamping plates 27 are fixedly connected with rubber pads, and the surface of each positioning shaft 28 is sleeved with a spring 29, and the two ends of the spring 29 are respectively fixedly connected to the two clamping plates 27. The left surface of the upper clamping plate 27 is rotatably connected with a linkage rod 216, and the left surface of the lower clamping plate 27 is rotatably connected with a force rod 217. The linkage rod 216 and the force rod 217 are rotatably connected via a rotating shaft, and a slider 218 is slidably connected inside the rotating shaft, and the slider 218 passes through the front surface of the linkage rod 216.

[0043] In this embodiment: pull one end of the plastic film and place one end of the plastic film between the two clamps 27, then press down the force rod 217, the force rod 217 will rotate on the surface of the lower clamp 27, the clamp 27 connected to the force rod 217 through the rotating shaft will slide toward the lower clamp 27 on the inner surface of the positioning shaft 28, the spring 29 sleeved on the surface of the positioning shaft 28 will be compressed until the two clamps 27 clamp the plastic film through the rubber pad, so that the motor 21 is connected to the external power supply and then started, the sprocket connected to the output shaft of the motor 21 drives the two driven wheels 24 to rotate through the chain 22, the screw 23 connected to the driven wheel 24 will rotate inside the base 1, and the positioning block 25 threadedly connected to the screw 23 will move with the plastic film.

[0044] It should be noted that the rubber pad is provided to prevent slipping when the plastic film is clamped.

[0045] Going further:

[0046] In an optional embodiment, a rectangular groove is provided at the intersection of the linkage rod 216 and the force rod 217, and the slider 218 is composed of two rectangular structural blocks of different sizes. The smaller rectangular block is slidably connected to its bearing, and the larger rectangular block can be inserted into the rectangular grooves of the linkage rod 216 and the force rod 217.

[0047] In this embodiment, by pressing the slider 218 , the slider 218 will slide inside the rotating shaft until the larger end of the slider 218 limits the linkage rod 216 and the force rod 217 , thereby limiting the two clamping plates 27 .

[0048] Going further:

[0049] In an optional embodiment, a sliding rod 211 is inserted into the interior of the left positioning block 25, and the sliding rod 211 and the left positioning block 25 are slidably connected. The end of the sliding rod 211 close to the positioning rod 214 is fixedly connected to the first limit block 210 and inserted into the interior of the positioning rod 214, and the end of the sliding rod 211 away from the positioning rod 214 is fixedly connected to the second limit block 212. Two fixed grooves 219 are symmetrically opened inside the left positioning block 25, and a tension spring 213 is installed inside each of the fixing grooves 219. The two ends of the tension spring 213 are respectively fixedly connected to the second limit block 212 and the left positioning block 25.

[0050] In this embodiment, in order to prevent the position from being offset due to the failure to fit the base 1 during the pressing and cutting, the second limit block 212 is pulled out from the inside of the left positioning block 25, and the tension spring 213 connected to the second limit block 212 is stretched, and at the same time, the slide bar 211 slides toward the second limit block 212, and the first limit block 210 connected to the slide bar 211 is pulled out from the inside of the left positioning rod 214, and then a force is applied to the limit rod 26 to make it rotate ninety degrees inside the positioning block 25 through the positioning rod 214. , so that the two clamping plates 27 are away from one end of the limit rod 26 toward the base 1, and the torsion spring 215 will be stretched during the rotation. After the rotation is completed, the second limit block 212 is released, and the two tension springs 213 will pull the second limit block 212 back to its original position due to elastic potential energy, and the first limit block 210 will be inserted into the interior of the positioning rod 214 again. Because the second limit block 212 and the first limit block 210 are gear-shaped structures, the limit rod 26 is limited to prevent rotation, thereby achieving the goal of the plastic film being attached to the upper surface of the base 1.

[0051] It should be noted that the first limiting block 210 and the second limiting block 212 are gear-type structures, and gear grooves are provided inside the left positioning block 25 and the left positioning rod 214 to facilitate positioning thereof.

[0052] Going further:

[0053] In an optional embodiment, a torsion spring 215 is installed inside the right positioning block 25 , and two ends of the torsion spring 215 are fixedly connected to the right positioning rod 214 and the right positioning block 25 , respectively.

[0054] In this embodiment: the positioning block 25 is moved to its original position, and the second limiting block 212 is pulled out from the inside of the positioning block 25. At the moment when the first limiting block 210 leaves the positioning rod 214, the torsion spring 215 will rotate the limiting rod 26 ninety degrees due to elastic potential energy, so that the force rod 217 returns to its original position.

[0055] Going further:

[0056] In an optional embodiment, it further includes an auxiliary component 3 disposed on the front surface of the base 1;

[0057] The auxiliary component 3 includes a fixed block 31 fixedly connected to the front surface of the base 1. The front surface of the fixed block 31 is symmetrically connected to two cover plates 32 through a hinge. Each cover plate 32 is rotatably connected to a flattening roller 33 on one side facing the fixed block 31. The adjacent ends of the two flattening rollers 33 are lower than the opposite ends. The two flattening rollers 33 form a V-shaped structure.

[0058] In this embodiment, the positioning block 25 will move with the plastic film, and the plastic film will slide inside the fixed block 31, and the two flattening rollers 33 will be rotated to flatten the plastic film to prevent wrinkles.

[0059] It should be noted that the two flattening rollers 33 are arranged in a V-shaped structure, and when the two flattening rollers 33 are rolled, the plastic film can be subjected to an outward expansion force, so that the plastic film will not wrinkle.

[0060] Going further:

[0061] In an optional embodiment, the front surfaces of the two cover plates 32 are fixedly connected with positioning frames 34 , and the interiors of the two positioning frames 34 are slidably connected with latches 35 .

[0062] In this embodiment, force is applied to the latch 35 to make it slide out from the inside of the two positioning frames 34, release the limit on the cover plate 32, and then the two cover plates 32 can be turned over on the surface of the fixing block 31 through the hinge.

[0063] The working principle and use process of the utility model are as follows: when the device is needed to perform film cutting, force is applied to the latch 35 to make the latch 35 slide out from the inside of the two positioning frames 34, release the limit on the cover plate 32, and then flip the two cover plates 32 on the surface of the fixed block 31 through the hinges, and the two flattening rollers 33 will rotate with the flipping of the cover plates 32, and then place one end of the rolled plastic film inside the fixed block 31, and then flip the two cover plates 32 back to their original positions, and the two flattening rollers 33 will press on the surface of the plastic film, and then insert the latch 35 back into the positioning frame 34 to limit the cover plate 32, and then pull one end of the plastic film to place one end of the plastic film between the two clamping plates 27, and then press down the force rod 217, and the force rod 217 will The surface of the lower clamping plate 27 rotates, and the clamping plate 27 connected to the force-applying rod 217 through the rotating shaft will slide toward the lower clamping plate 27 on the inner surface of the positioning shaft 28, and the spring 29 sleeved on the surface of the positioning shaft 28 will be compressed until the two clamping plates 27 clamp the plastic film through the rubber pad, and then the slider 218 is pressed, and the slider 218 slides inside the rotating shaft until the larger end of the slider 218 limits the linkage rod 216 and the force-applying rod 217, thus limiting the two clamping plates 27 to clamp the plastic film, and then, in order to prevent the position from being offset due to the failure to fit the base 1 during the press cutting, the second limit block 212 is pulled out from the inside of the left positioning block 25, and the tension spring 213 connected to the second limit block 212 is stretched, and the slide The rod 211 will slide in the direction of the second limit block 212, and the first limit block 210 connected to the slide rod 211 will be pulled out from the inside of the left positioning rod 214, and then force is applied to the limit rod 26 to make it rotate ninety degrees inside the positioning block 25 through the positioning rod 214, so that the two clamping plates 27 are away from the end of the limit rod 26 toward the base 1, and the torsion spring 215 will be stretched during the rotation. After the rotation is completed, the second limit block 212 is released, and the two tension springs 213 will pull the second limit block 212 back to its original position due to elastic potential energy, and the first limit block 210 will be inserted into the inside of the positioning rod 214 again. Because the second limit block 212 and the first limit block 210 are gear-shaped structures, the limit rod 26 is limited to prevent rotation, thereby achieving plastic film bonding. On the upper surface of the base 1, the motor 21 is connected to an external power source and then started. The sprocket connected to the output shaft of the motor 21 drives the two driven wheels 24 to rotate through the chain 22. The screw 23 connected to the driven wheel 24 will rotate inside the base 1. The positioning block 25 threadedly connected to the screw 23 will move with the plastic film, and the plastic film will slide inside the fixed block 31. The two flattening rollers 33 will be driven to rotate and then flatten the plastic film to prevent wrinkles. After the positioning block 25 moves to a suitable position, the motor 21 is stopped, and then the electric push rod is started. The electric push rod will lower the cutting module 12, and the two flattening plates 13 will first push against the plastic film to flatten it again to prevent wrinkles, and then the cutter connected to the cutting module 12 will cut the plastic film.Then the cutting module 12 will be retracted, and then the motor 21 will be started again to reverse, and the positioning block 25 will be moved to the original position, and the second limit block 212 will be pulled out from the inside of the positioning block 25. At the moment when the first limit block 210 leaves the positioning rod 214, the torsion spring 215 will rotate the limit rod 26 by 90 degrees due to elastic potential energy, so that the force rod 217 will be rotated back to the original position, and then the slider 218 will be pulled out from the inside of the linkage rod 216, and then the force rod 217 will be lifted up to separate the two clamps 27 to remove the cut plastic film, and then continue to place one end of the plastic film between the two clamps 27 and repeat the above action.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A plastic film pressing and cutting device, comprising a base (1) and a limit frame (11) fixedly connected to the upper surface of the base (1), a cutting module (12) is installed inside the limit frame (11), and two paving plates (13) are symmetrically arranged on the surface of the cutting module (12), characterized in that: It also includes a clamping assembly (2) arranged on the upper surface of the base (1); The clamping assembly (2) comprises a motor (21) mounted on the rear surface of the base (1); the output shaft of the motor (21) is fixedly connected to a sprocket, and the surface of the sprocket is meshedly connected to a chain (22); the interior of the chain (22) is symmetrically meshedly connected to two driven wheels (24); the surface of each driven wheel (24) is fixedly connected to a screw rod (23); the screw rod (23) is rotatably connected to the base (1); the surface of each screw rod (23) is threadedly connected to a positioning block (25); a limiting rod (26) is provided on one side adjacent to the two positioning blocks (25); two positioning rods (214) are symmetrically fixedly connected to the two ends of the limiting rod (26); the two positioning rods (214) are inserted into the interior of the two positioning blocks (25) and are rotatably connected; the interior of the limiting rod (26) is symmetrically fixedly connected to two positioning shafts (28); the surface of the positioning shaft (28) is symmetrically slidably connected to two clamping plates (27).

2. The plastic film pressing and cutting device according to claim 1, characterized in that: Adjacent surfaces of the two clamping plates (27) are both fixedly connected with rubber pads.

3. The plastic film pressing and cutting device according to claim 1, characterized in that: The surface of each positioning shaft (28) is sleeved with a spring (29), and the two ends of the spring (29) are respectively fixedly connected to the two clamps (27). The left surface of the upper clamp (27) is rotatably connected to a linkage rod (216), and the left surface of the lower clamp (27) is rotatably connected to a force application rod (217). The linkage rod (216) and the force application rod (217) are rotatably connected via a rotating shaft, and a slider (218) is slidably connected inside the rotating shaft. The slider (218) passes through the front surface of the linkage rod (216).

4. The plastic film pressing and cutting device according to claim 3, characterized in that: A rectangular groove is provided at the intersection of the linkage rod (216) and the force application rod (217); the slider (218) is composed of two rectangular structural blocks of different sizes, the smaller rectangular block is slidably connected to its bearing, and the larger rectangular block can be inserted into the rectangular grooves of the linkage rod (216) and the force application rod (217).

5. The plastic film pressing and cutting device according to claim 1, characterized in that: A sliding rod (211) is inserted into the interior of the left positioning block (25), and the sliding rod (211) and the left positioning block (25) are slidably connected. The end of the sliding rod (211) close to the positioning rod (214) is fixedly connected to the first limit block (210) and inserted into the interior of the positioning rod (214), and the end of the sliding rod (211) away from the positioning rod (214) is fixedly connected to the second limit block (212). Two fixed grooves (219) are symmetrically provided inside the left positioning block (25), and a tension spring (213) is installed inside each of the fixed grooves (219), and the two ends of the tension spring (213) are respectively fixedly connected to the second limit block (212) and the left positioning block (25).

6. The plastic film pressing and cutting device according to claim 5, characterized in that: A torsion spring (215) is installed inside the right positioning block (25), and two ends of the torsion spring (215) are respectively fixedly connected to the right positioning rod (214) and the right positioning block (25).

7. The plastic film pressing and cutting device according to claim 1, characterized in that: It also includes an auxiliary component (3) arranged on the front surface of the base (1); The auxiliary component (3) comprises a fixed block (31) fixedly connected to the front surface of the base (1); the front surface of the fixed block (31) is symmetrically rotatably connected to two cover plates (32) via a hinge; each of the cover plates (32) is rotatably connected to a flattening roller (33) on a side facing the fixed block (31).

8. The plastic film pressing and cutting device according to claim 7, characterized in that: One adjacent end of the two flattening rollers (33) is lower than the opposite end, and the two flattening rollers (33) form a V-shaped structure.

9. The plastic film pressing and cutting device according to claim 7, characterized in that: The front surfaces of the two cover plates (32) are fixedly connected with positioning frames (34), and latches (35) are slidably connected inside the two positioning frames (34).

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