Plastic extrusion flat film wire drawing device and method

Abstract

The invention belongs to the field of flat film wire drawing, and particularly relates to a plastic extrusion flat film wire drawing device which comprises a plastic flat film extrusion device, a base is fixedly connected to one side of the plastic flat film extrusion device, two sets of mounting frames are fixedly connected to the top of the base, and cooling rollers are arranged in the two sets of mounting frames. An operation table is fixedly connected to the side, away from the cooling roller, of the top of the base. A plurality of slitting tools are fixedly connected to the inner wall of the operation table at equal intervals. According to the plastic extrusion flat film wire drawing device and method, when the feeding hopper is used for exhausting air, negative pressure is generated below a flat film, the flat film can be conveniently pressed downwards, the contact effect between the flat film and the cooling roller is good, impurities scraped from the cooling roller can be pumped into the purification box through the feeding hopper, the scraped impurities cannot cause secondary pollution to the flat film, and the service life of the flat film is prolonged. Through the arrangement of the two splitter plates, the cold air blown down from the upper part is divided into three strands, and the cold air in the middle is directly blown downwards to press the flat film between the two cooling rollers downwards.

Description

Technical Field

[0001] The invention belongs to the field of flat film wire drawing, in particular to a plastic extrusion flat film wire drawing device and method. Background Art

[0002] The plastic flat wire drawing machine currently in use generally includes a hot melt device, a flat film extrusion device, a film cutting and drawing device, and a wire winding device. According to the process flow, the hot melt device is used to melt the plastic, which is then made into a flat film through the flat film extrusion device. The flat film produced is cut into wires through the film cutting and drawing device, and the flat wire is wound by the wire winding device.

[0003] When the flat film needs to be formed in time after extrusion, the existing technology generally uses a cooling roller to cool the flat film. However, the flat film just extruded has not yet been shaped, so it is inconvenient to tension it. In addition, its surface area is large and its texture is thin. Therefore, it is easy to float during the transmission process, and the contact effect with the cooling roller is poor, causing the formed flat film to have wrinkles due to uneven cooling. In addition, when the flat film is cut into wires by the knife group, as the knife group and the flat film continue to rub, the surface temperature of the knife group will rise, which not only reduces the sharpness of the knife group, but also causes a large amount of debris to appear on the edge of the flat film during cutting, affecting the smoothness of subsequent wire drawing, and causes the flat film near the knife group to heat up and bend, affecting the effect of cutting the flat film into wires.

[0004] To this end, the present invention provides a plastic extrusion flat film drawing device and method. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the problem that the flat film just extruded has not yet been shaped and is inconvenient to be tensioned and pulled, and its surface area is large and its texture is thin and light, so it is easy to float during the transmission process, and the contact effect with the cooling roller is poor, causing the formed flat film to have wrinkles due to uneven cooling. In addition, when the flat film is cut into wires by the knife group, as the knife group and the flat film continue to rub against each other, the surface temperature of the knife group will rise, which not only reduces the sharpness of the knife group, but also causes a large amount of debris to appear on the edge of the flat film during cutting, affecting the smoothness of the subsequent wire drawing, and causes the flat film near the knife group to heat up and bend, affecting the effect of cutting the flat film into wires. The present invention proposes a plastic extrusion flat film wire drawing device and method.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a plastic extrusion flat film wire drawing device according to the present invention includes a plastic flat film extrusion device, one side of the plastic flat film extrusion device is fixedly connected to a base, the top of the base is fixedly connected to two sets of mounting frames, both sets of mounting frames are provided with cooling rollers, the top of the base and the side away from the cooling roller is fixedly connected to an operating table, the inner wall of the operating table is fixedly connected to a plurality of slitting tools at equal intervals, and also includes: The cooling air component is used to discharge cold air and cool the upper part of the flat membrane; Filter assembly, used to filter the cold air before discharge; Cleaning assembly, used to clean the surface of the cooling roller in use; Cold air auxiliary component, used to press down the flat film during transportation; Cooling component, used to cool the slitting tool in use; The cold air recovery component is used to recover and reuse the cold air discharged above the flat membrane.

[0007] Preferably, the cold air assembly includes two groups of support frames, which are symmetrically fixed on the top of the base. A cold air pump is fixedly connected between the two support frames. The cold air pump is located above the cooling roller. The input end of the cold air pump is fixedly connected to an air inlet pipe, and the output end of the cold air pump is fixedly connected to an air outlet pipe.

[0008] Preferably, the filter assembly includes a purification box, which is fixedly installed on the top of the air inlet pipe, and the top of the purification box is fixedly connected to the first air supply pipe, the inner wall of the purification box is symmetrically fixedly connected to two sliding shafts, the outer walls of the two sliding shafts are slidably connected to sliders, a filter plate is fixedly connected between the two sliders, the top of the filter plate is set to a symmetrical inclined plane, the outer wall of the sliding shaft is sleeved with a spring, the top of the spring is fixedly connected to the purification box, the bottom of the spring is fixedly connected to the slider, the outer wall of the purification box is fixedly connected to a motor, the output end of the motor extends to the interior of the purification box and is located below the filter plate, and the outer wall of the motor output end is fixedly connected to two eccentric wheels.

[0009] Preferably, a mounting platform is fixedly connected between the two mounting frames, an exhaust pipe is fixedly connected to the inner wall of the mounting platform, and two first connecting pipes are symmetrically fixedly connected to the bottom of the exhaust pipe, and both of the first connecting pipes are connected to the first gas supply pipe.

[0010] Preferably, the cleaning assembly includes two scrapers, which are symmetrically fixed on the top of the mounting platform. The scrapers fit the outer wall of the cooling roller, and the top of the exhaust pipe is fixedly connected to a feed hopper.

[0011] Preferably, the cold air auxiliary component includes a sleeve box, which is fixedly installed on the outer wall of the air outlet duct, and the inner wall of the sleeve box is set as a symmetrical inclined surface. The bottom of the sleeve box is fixedly connected with a cover plate, and the bottom of the cover plate is symmetrically fixedly connected with two side plates, and the bottom of the cover plate is symmetrically fixedly connected with two guide blocks, and the two guide blocks are respectively located above the two cooling rollers, and the outer walls of the two guide blocks are both set as inclined surfaces, and two diverter plates are fixedly connected between the two side plates, and the two diverter plates are both set as arcs.

[0012] Preferably, the cooling component includes an air delivery trough, which is opened inside the operating table and is arranged in a ring shape. Several air outlet grooves are equidistantly opened on the top and bottom of the inner wall of the operating table. The air outlet grooves are communicated with the air delivery trough. Two diversion blocks are symmetrically fixedly connected to the inner wall of the air delivery trough. The outer walls of the two diversion blocks are arranged as symmetrical inclined surfaces. Two second connecting pipes are symmetrically fixedly connected to the outer wall of the operating table. One end of the two second connecting pipes extends to the interior of the air delivery trough, and a second air delivery pipe is fixedly connected between the two second connecting pipes.

[0013] Preferably, the cold air recovery component includes a sleeve, which is fixedly mounted on the top of the cover plate, and the outer wall of the sleeve is fixedly connected to a connecting hose, one end of the connecting hose is communicated with the second air supply pipe, and the inner wall of the sleeve is provided with a first one-way valve, which opens from bottom to top, and the inner wall of the connecting hose is provided with a second one-way valve, which opens toward the operating table, and the inner wall of the sleeve is slidably connected to a piston plate above the first one-way valve, and the top of the piston plate is fixedly connected to a piston rod, and the top of the piston rod passes through the sleeve, and the output end of the motor passes through the purification box and is fixedly connected to a crank, and one side of the crank is rotatably connected to a connecting shaft, and the connecting shaft is rotatably connected to the piston rod.

[0014] Preferably, the top and bottom of the inner wall of the operating table are fixedly connected with a baffle, the baffle is arranged in an arc shape, the inner wall of the baffle is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is rotatably connected with a pulley, the top and bottom of the inner wall of the operating table and the side away from the baffle are fixedly connected with a flow block, and the outer walls of the two flow blocks are arranged as inclined surfaces.

[0015] A method for a plastic extrusion flat film drawing device, which is applicable to the above-mentioned plastic extrusion flat film drawing device, and the steps of the method are as follows: S1: Control the rotation of two cooling rollers. The flat film is transported on the two cooling rollers to cool and shape the flat film during transportation. Several slitting tools are used to cut the flat film into wires. S2: Start the cold air pump to extract air between the two cooling rollers and discharge the cold air from the air outlet pipe to cool and shape the flat film being transported below; S3: Start the motor and control the piston plate to move up and down reciprocatingly, pumping the cooling air into the operating table to cool the slitting tool in use.

[0016] The beneficial effects of the present invention are as follows: 1. The device and method for plastic extrusion flat film drawing described in the present invention, when air is sucked out through the feed hopper, creates negative pressure under the flat film, which facilitates pressing the flat film downward, and has a good contact effect with the cooling roller. Furthermore, the feed hopper can suck the debris scraped off the cooling roller into the purification box, so that the scraped debris will not cause secondary pollution to the flat film.

[0017] 2. The plastic extrusion flat film drawing device and method described in the present invention divides the cold air blown down from above into three streams through the two diverter plates. The cold air in the middle blows straight downward to press the flat film between the two cooling rollers downward, and the cold air on both sides is guided by the curved surface of the diverter plate and blows to both sides. When passing through the guide block, the flow direction of the cold air is changed under the guidance of the inclined surface of the outer wall of the guide block, so that the cold air flowing under the guide block is blown downward, thereby pressing the flat film downward, making the flat film in transit stick to the cooling roller, and thus the flat film can be cooled evenly. After passing through the guide block, the cold air is wrapped by the cover plate and the side plate, so that the cold air continues to flow to both sides. At this time, the cold air flowing in the direction of the plastic flat film extrusion device will first contact the flat film just extruded, which is convenient for pre-cooling the flat film.

[0018] 3. The plastic extrusion flat film wire drawing device and method described in the present invention, through the guidance of the curved surface of the baffle, allows the cold air discharged from the air trough to flow accurately to the slitting tool, cooling the slitting tool in use, avoiding the increase in surface temperature of the slitting tool and the reduction in sharpness, and avoiding the flat film near the slitting tool from heating up and bending. The provided pulley cooperates with the baffle to block the cold air on the left side of the slitting tool to prevent the cold air from leaking out quickly.

[0019] 4. The plastic extrusion flat film drawing device and method described in the present invention form a narrow air outlet on the right side of the operating table through the cooperation of two baffles. When the cold air is discharged from between the two baffles, it is convenient to increase the pressure of the cold air blowing, blow the cut flat film horizontally, and prevent cutting debris from remaining on the flat film after cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional diagram of the plastic flat film extrusion device of the present invention used in conjunction with a cold air pump; Figure 2 This is a cross-sectional view of the cold air pump and the cooling roller used in conjunction with each other; Figure 3 This is an exploded view of the scraper and the cooling roller of the present invention in cooperation with each other; Figure 4 This is an exploded view of the operating table and baffle of the present invention in cooperation with each other; Figure 5 This is a three-dimensional diagram of the box and the cover plate of the present invention in use; Figure 6 It is a side cross-sectional view of the gas delivery trough and the gas outlet trough used in conjunction with each other in the present invention; Figure 7 This invention Figure 2 Enlarged view of point A in the middle; Figure 8 This invention Figure 2 Enlarged view of point B in the middle; Figure 9 This invention Figure 2 Enlarged view of point C in the middle; Figure: 1, base; 2, mounting frame; 3, cooling roller; 4, support frame; 5, cooling pump; 6, air inlet pipe; 7, air outlet pipe; 8, sleeve box; 9, cover plate; 10, side plate; 11, guide block; 12, diverter plate; 13, purification box; 14, first air pipeline; 15, sliding shaft; 16, slider; 17, spring; 18, filter plate; 19, motor; 20, eccentric wheel; 21, mounting table; 22, scraper; 23, first connecting pipe; 2 4. Exhaust pipe; 25. Feed hopper; 26. Operating table; 27. Slitting tool; 28. Air supply trough; 29. ​​Air outlet trough; 30. Diverter block; 31. Second connecting pipe; 32. Second air supply pipe; 33. Sleeve; 34. Piston rod; 35. Piston plate; 36. First one-way valve; 37. Crank; 38. Connecting shaft; 39. Connecting hose; 40. Second one-way valve; 41. Baffle; 42. Rotating shaft; 43. Pulley; 44. Flow block. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 9As shown, the present invention provides a technical solution, a plastic extrusion flat film drawing device, including a plastic flat film extrusion device, one side of the plastic flat film extrusion device is fixedly connected to a base 1, the top of the base 1 is fixedly connected to two groups of mounting frames 2, the interiors of the two groups of mounting frames 2 are each provided with a cooling roller 3, the top of the base 1 and the side away from the cooling roller 3 is fixedly connected to an operating table 26, the inner wall of the operating table 26 is equidistantly fixedly connected to a plurality of slitting knives 27, and also includes a cooling assembly for discharging cooling air to cool the top of the flat film; a filtering assembly for filtering the cooling air before discharge; a cleaning assembly for cleaning the surface of the cooling roller 3 in use; a cooling auxiliary assembly for pressing down the flat film in transportation; a cooling assembly for cooling the slitting knives 27 in use; a cooling air recovery assembly for recycling the cooling air discharged above the flat film; the cooling assembly includes two groups of support frames 4, the two groups of support frames 4 are symmetrically fixedly mounted on the top of the base 1, and the two support frames 4 are symmetrically fixedly mounted on the top of the base 1. A cold air pump 5 is fixedly connected between them, and the cold air pump 5 is located above the cooling roller 3. The input end of the cold air pump 5 is fixedly connected to the air inlet pipe 6, and the output end of the cold air pump 5 is fixedly connected to the air outlet pipe 7. The filter assembly includes a purification box 13, which is fixedly installed on the top of the air inlet pipe 6. The top of the purification box 13 is fixedly connected to the first air supply pipe 14. The inner wall of the purification box 13 is symmetrically fixedly connected to two sliding shafts 15. The outer walls of the two sliding shafts 15 are slidably connected with sliders 16. A filter plate 18 is fixedly connected between the two sliders 16. The top of the filter plate 18 is set to a symmetrical inclined plane. The outer wall of the sliding shaft 15 is provided with a spring 17. The top of the spring 17 is fixedly connected to the purification box 13, and the bottom of the spring 17 is fixedly connected to the slider 16. The outer wall of the purification box 13 is fixedly connected to a motor 19. The output end of the motor 19 extends to the interior of the purification box 13 and is located below the filter plate 18. The outer wall of the output end of the motor 19 is fixedly connected to two eccentric wheels 20.

[0024] Through the above technical solution, after the flat film is extruded by the plastic flat film extrusion device, the flat film is transported on two cooling rollers 3, the cooling rollers 3 are controlled to rotate, and the flat film in transport is cooled and shaped. The flat film after cooling and shaping passes through the operating table 26, and is cut into wires by a number of slitting knives 27. While the flat film is cold-cut and shaped by the cooling rollers 3, the cold air pump 5 is started to draw in the outside air along the air inlet pipe 6. After refrigeration by the cold air pump 5, the cold air is discharged from the air outlet pipe 7 to cool and shape the flat film in transport below, and the flat film in transport is placed in a downward pressure state by wind power, and the bonding effect with the cooling roller 3 is good. When the air inlet pipe 6 is evacuated, the outside air is discharged from the first outlet pipe 6. The air duct 14 enters the purification box 13, and the extracted gas is filtered by the filter plate 18 to prevent the cold air blown out by the cold air pump 5 from being mixed with dust and affecting the cleanliness of the flat membrane. The filtered dust remains on the top of the filter plate 18, and the motor 19 is started to drive the eccentric wheel 20 to rotate. When the raised end of the eccentric wheel 20 rotates to the top, the filter plate 18 is pushed to move upward, causing the slider 16 to move upward and compressing the spring 17. When the raised end of the eccentric wheel 20 rotates to the bottom, the squeezing of the eccentric wheel 20 is lost. Under the action of the spring 17, the filter plate 18 vibrates downward, and thus reciprocates. After the motor 19 is started, the filter plate 18 is driven to vibrate downward continuously to prevent the filter plate 18 from being blocked by dust and affecting the air intake.

[0025] like Figure 2 、 3 5. Specifically, a mounting platform 21 is fixedly connected between the two mounting frames 2. An exhaust pipe 24 is fixedly connected to the inner wall of the mounting platform 21. Two first connecting pipes 23 are symmetrically fixedly connected to the bottom of the exhaust pipe 24. Both first connecting pipes 23 are connected to the first gas pipeline 14. The cleaning component includes two scrapers 22. The two scrapers 22 are symmetrically fixedly installed on the top of the mounting platform 21. The scrapers 22 fit the outer wall of the cooling roller 3. The top of the exhaust pipe 24 is fixedly connected to the feed hopper 25. The cooling air auxiliary The component includes a sleeve box 8, which is fixedly mounted on the outer wall of the air outlet pipe 7. The inner wall of the sleeve box 8 is set as a symmetrical inclined surface. The bottom of the sleeve box 8 is fixedly connected with a cover plate 9. The bottom of the cover plate 9 is symmetrically fixedly connected with two side plates 10. The bottom of the cover plate 9 is symmetrically fixedly connected with two guide blocks 11. The two guide blocks 11 are respectively located above the two cooling rollers 3. The outer walls of the two guide blocks 11 are both set as inclined surfaces. Two diverter plates 12 are fixedly connected between the two side plates 10. The two diverter plates 12 are both set as arcs.

[0026] Through the above technical solution, the two scrapers 22 are arranged to fit the outer walls of the two cooling rollers 3, so as to facilitate continuous cleaning of the surface of the cooling roller 3 and prevent debris from adhering to the surface of the cooling roller 3, which causes pollution to the flat film when the flat film is cooled. When the air inlet pipe 6 is evacuated, the external gas enters the exhaust pipe 24 from the feed hopper 25 and is transmitted to the first air delivery pipe 14 along the first connecting pipe 23. Therefore, after the cold air pump 5 is started, the air is evacuated through the feed hopper 25, so as to facilitate the extraction of debris scraped from the outer wall of the cooling roller 3, and the scraped debris is pumped into the purification box 13, so that the scraped debris will not cause secondary pollution to the flat film, and the air is evacuated through the feed hopper 25, so that a negative pressure is generated under the flat film, which facilitates the flat film to be pressed downward, and the contact effect with the cooling roller 3 is good. After the cold air pump 5 is started, the cold air is blown out from the air outlet pipe 7 and enters the sleeve box 8 The cold air is guided by the inclined surface of the inner wall of the sleeve box 8, so that the cold air flows downward in the center, and is divided into three streams by the two diverter plates 12. The cold air in the middle blows straight downward, pressing the flat film between the two cooling rollers 3 downward, and the cold air on both sides is guided by the curved surface of the diverter plate 12 and blows to both sides. When passing through the guide block 11, the flow direction of the cold air is changed under the guidance of the inclined surface of the outer wall of the guide block 11, so that the cold air flowing under the guide block 11 is blown downward, thereby pressing the flat film downward, making the flat film in transport rest against the cooling roller 3, so that the flat film can be evenly cooled, and after passing through the guide block 11, the cold air is wrapped by the cover plate 9 and the side plate 10, so that the cold air continues to flow to both sides. At this time, the cold air flowing in the direction of the plastic flat film extrusion device will first contact the flat film just extruded, which is convenient for pre-cooling the flat film.

[0027] like Figure 2 、 4, 6, 7, 8, and 9, specifically, the cooling component includes an air delivery groove 28, which is opened inside the operating table 26 and is arranged in an annular shape. A plurality of air outlet grooves 29 are equidistantly provided on the top and bottom of the inner wall of the operating table 26, and the air outlet grooves 29 are communicated with the air delivery groove 28. The inner wall of the air delivery groove 28 is symmetrically fixedly connected with two diverter blocks 30, and the outer walls of the two diverter blocks 30 are arranged with symmetrical inclined surfaces. The outer wall of the operating table 26 is symmetrically fixedly connected with two second connecting pipes 31, one end of the two second connecting pipes 31 extends to the interior of the air delivery groove 28, and a second air delivery pipe 32 is fixedly connected between the two second connecting pipes 31; the cold air recovery component includes a sleeve 33, which is fixedly mounted on the top of the cover plate 9, and a connecting hose 39 is fixedly connected to the outer wall of the sleeve 33, and one end of the connecting hose 39 is communicated with the second air delivery pipe 32, and a first one-way valve 36 is provided on the inner wall of the sleeve 33. The first one-way valve 36 opens from bottom to top, and the inner wall of the connecting hose 39 is provided with a second one-way valve 40, which opens toward the operating platform 26. The inner wall of the sleeve 33 and above the first one-way valve 36 are slidably connected with a piston plate 35, and the top of the piston plate 35 is fixedly connected to the piston rod 34, and the top of the piston rod 34 passes through the sleeve 33. The output end of the motor 19 passes through the purification box 13 and is fixedly connected to a crank 37. One side of the crank 37 is rotatably connected to a connecting shaft 38, and the connecting shaft 38 is rotatably connected to the piston rod 34; the top and bottom of the inner wall of the operating platform 26 are fixedly connected to a baffle 41, which is arranged in an arc shape. The inner wall of the baffle 41 is fixedly connected to a rotating shaft 42, and the outer wall of the rotating shaft 42 is rotatably connected to a pulley 43. The top and bottom of the inner wall of the operating platform 26 and the side away from the baffle 41 are fixedly connected to a flow block 44, and the outer walls of the two flow blocks 44 are arranged as inclined surfaces.

[0028] Through the above technical solution, when the motor 19 is started, the crank 37 is driven to rotate, and the piston rod 34 is driven to move back and forth up and down through the provided connecting shaft 38, so that the piston plate 35 moves back and forth up and down. When the piston plate 35 moves upward, the first one-way valve 36 and the second one-way valve 40 are cooperated to facilitate the cold air flowing from the bottom of the cover plate 9 to the operating table 26 to be drawn into the sleeve 33. When the piston plate 35 moves downward, the first one-way valve 36 and the second one-way valve 40 are cooperated to squeeze the cold air in the sleeve 33 along the connecting hose 39, the second gas pipeline 32, and the second connecting pipeline 31 into the gas delivery groove 28. The cold air entering the gas delivery groove 28 is divided into two streams by the diverter block 30 and discharged from the upper gas outlet groove 29 and the lower gas outlet groove 29 respectively. The slitting tool 27 in use is cooled to prevent the surface temperature of the slitting tool 27 from increasing and reducing its sharpness, and to prevent the flat film near the slitting tool 27 from heating and bending. The cold air discharged from the air delivery groove 28 is guided by the curved surface of the baffle 41 to flow accurately to the slitting tool 27. The pulley 43 provided cooperates with the baffle 41 to block the cold air on the left side of the slitting tool 27 to prevent the cold air from leaking out quickly, and the pulley 43 can prevent the flat film from being damaged by friction with the baffle 41. The cooperation of the two flow-blocking blocks 44 forms a narrow air outlet on the right side of the operating table 26. When the cold air is discharged from between the two flow-blocking blocks 44, it is convenient to increase the pressure of the cold air blowing, blow the slit flat film horizontally, and prevent cutting debris from remaining on the flat film after slitting.

[0029] A method for a plastic extrusion flat film drawing device, which is applicable to the above-mentioned plastic extrusion flat film drawing device, and the steps of the method are as follows: S1: Control the rotation of the two cooling rollers 3. The flat film is transported on the two cooling rollers 3. The flat film is cooled and shaped during transport. The flat film is cut into wires using a plurality of slitting cutters 27. S2: Start the cold air pump 5 to extract air between the two cooling rollers 3 and discharge the cold air from the air outlet pipe 7 to cool and shape the flat film being transported below; S3: Start the motor 19 and control the piston plate 35 to move up and down reciprocatingly, so as to draw the cooling air into the operating table 26 to cool the slitting tool 27 in use.

[0030] During use, after the flat film is extruded by the plastic flat film extrusion device, the flat film is transported on two cooling rollers 3, and the cooling rollers 3 are controlled to rotate to cool and shape the flat film being transported. The two scrapers 22 are arranged to fit the outer walls of the two cooling rollers 3, so as to continuously clean the surface of the cooling rollers 3 and prevent foreign matter from adhering to the surface of the cooling rollers 3, which may cause pollution to the flat film during cooling. The flat film after cooling and shaping passes through the operating table 26 and is cut into wires by a number of slitting knives 27. While the flat film is cold-cut and shaped by the cooling rollers 3, the cold air pump 5 is started, and the outside air enters the exhaust pipe 24 from the feed hopper 25 and is transmitted to the first air delivery pipe 14 along the first connecting pipe 23, and the scraped foreign matter is sucked into the purification box 13, so that the scraped foreign matter is removed. The debris under the flat film will not cause secondary pollution to the flat film, and the air is extracted through the feed hopper 25, so that negative pressure appears under the flat film, which is convenient for pressing the flat film downward and having a good contact effect with the cooling roller 3. The gas entering the purification box 13 is filtered by the filter plate 18 to prevent the cold air blown out by the cold air pump 5 from being mixed with debris and affecting the cleanliness of the flat film. The filtered debris remains on the top of the filter plate 18, and the motor 19 is started to drive the eccentric wheel 20 to rotate. When the raised end of the eccentric wheel 20 rotates to the top, the filter plate 18 is pushed to move upward, so that the slider 16 moves upward and the spring 17 is compressed. When the raised end of the eccentric wheel 20 rotates to the bottom, the squeezing of the eccentric wheel 20 is lost. Under the action of the spring 17, the filter plate 18 vibrates downward, thus reciprocating. After the motor 19 is started, The filter plate 18 is driven to vibrate downward continuously to prevent the filter plate 18 from being blocked by dust and affecting the air intake. The filtered air enters the cold air pump 5 through the air intake pipe 6. After being refrigerated by the cold air pump 5, the cold air is blown out from the air outlet pipe 7 and enters the sleeve box 8. Guided by the inclined surface of the inner wall of the sleeve box 8, the cold air circulates downward in the center. The two diverter plates 12 are provided to divide the cold air into three streams. The cold air in the middle blows straight downward, pressing the flat film between the two cooling rollers 3 downward. The cold air on both sides is guided by the curved surface of the diverter plate 12 and blows to both sides. When passing through the guide block 11, the flow direction of the cold air is changed under the guidance of the inclined surface of the outer wall of the guide block 11, so that the cold air flowing under the guide block 11 is blown downward, thereby pressing the flat film downward, so that the cold air in the conveying The flat film is pressed against the cooling roller 3 so that the flat film can be cooled evenly, and after the cold air passes through the guide block 11, it is wrapped by the cover plate 9 and the side plate 10, so that the cold air continues to circulate to both sides. At this time, the cold air flowing in the direction of the plastic flat film extrusion device will first contact the flat film just extruded, which is convenient for pre-cooling the flat film. When the motor 19 is started, it drives the crank 37 to rotate, and drives the piston rod 34 to move up and down reciprocatingly through the provided connecting shaft 38, so that the piston plate 35 moves up and down reciprocatingly. When the piston plate 35 moves upward, it cooperates with the first one-way valve 36 and the second one-way valve 40 to facilitate the cold air flowing from the cover plate 9 to the operating table 26 to be drawn into the sleeve 33. When the piston plate 35 moves downward, it cooperates with the first one-way valve 36 and the second one-way valve 40.The cold air in the sleeve 33 can be squeezed into the air delivery groove 28 along the connecting hose 39, the second air delivery pipe 32, and the second connecting pipe 31. The cold air entering the air delivery groove 28 is divided into two streams by the diverter block 30 and discharged from the upper air outlet groove 29 and the lower air outlet groove 29 respectively, cooling the slitting tool 27 in use, avoiding the surface temperature of the slitting tool 27 from increasing and reducing the sharpness, and avoiding causing the flat film near the slitting tool 27 to heat up and bend. The air out of the air delivery groove 28 is guided by the curved surface of the baffle 41. The exhausted cold air is precisely directed toward the slitting blade 27. The pulley 43 cooperates with the baffle 41 to block the cold air on the left side of the slitting blade 27, preventing it from escaping quickly. The pulley 43 also prevents friction damage between the flat film and the baffle 41. The two baffles 44 cooperate to form a narrow air outlet on the right side of the operating table 26. When the cold air is discharged between the two baffles 44, the pressure of the cold air is increased, blowing horizontally across the slit flat film and preventing any residual cutting debris from remaining on the flat film after slitting.

[0031] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0033] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic extrusion flat film drawing device, comprising a plastic flat film extrusion device, wherein one side of the plastic flat film extrusion device is fixedly connected to a base (1), the top of the base (1) is fixedly connected to two sets of mounting frames (2), the interiors of the two sets of mounting frames (2) are both provided with cooling rollers (3), the top of the base (1) and the side away from the cooling rollers (3) are fixedly connected to an operating table (26), the inner wall of the operating table (26) is fixedly connected to a plurality of slitting tools (27) at equal intervals, and the device is characterized in that: include: The cooling air component is used to discharge cold air and cool the upper part of the flat membrane; Filter assembly, used to filter the cold air before discharge; A cleaning component for cleaning the surface of the cooling roller (3) in use; Cold air auxiliary component, used to press down the flat film during transportation; A cooling component for cooling the slitting tool (27) in use; The cold air recovery component is used to recover and reuse the cold air discharged above the flat membrane.

2. A plastic extrusion flat film drawing device according to claim 1, characterized in that: The cooling assembly comprises two groups of support frames (4), the two groups of support frames (4) are symmetrically fixedly mounted on the top of the base (1), a cooling pump (5) is fixedly connected between the two support frames (4), the cooling pump (5) is located above the cooling roller (3), the input end of the cooling pump (5) is fixedly connected to an air inlet pipe (6), and the output end of the cooling pump (5) is fixedly connected to an air outlet pipe (7).

3. A plastic extrusion flat film drawing device according to claim 2, characterized in that: The filter assembly includes a purification box (13), the purification box (13) is fixedly installed on the top of the air inlet pipe (6), the top of the purification box (13) is fixedly connected to the first air supply pipe (14), the inner wall of the purification box (13) is symmetrically fixedly connected to two sliding shafts (15), the outer walls of the two sliding shafts (15) are slidably connected to sliders (16), a filter plate (18) is fixedly connected between the two sliders (16), the top of the filter plate (18) is set as a symmetrical inclined surface, the outer wall of the sliding shaft (15) is provided with a spring (17), the top of the spring (17) is fixedly connected to the purification box (13), the bottom of the spring (17) is fixedly connected to the slider (16), the outer wall of the purification box (13) is fixedly connected to a motor (19), the output end of the motor (19) extends into the interior of the purification box (13) and is located below the filter plate (18), and the outer wall of the output end of the motor (19) is fixedly connected to two eccentric wheels (20).

4. A plastic extrusion flat film drawing device according to claim 3, characterized in that: A mounting platform (21) is fixedly connected between the two mounting frames (2), an air extraction pipe (24) is fixedly connected to the inner wall of the mounting platform (21), and two first connecting pipes (23) are symmetrically fixedly connected to the bottom of the air extraction pipe (24), and both of the two first connecting pipes (23) are in communication with the first gas transmission pipe (14).

5. A plastic extrusion flat film drawing device according to claim 4, characterized in that: The cleaning assembly includes two scrapers (22), which are symmetrically fixed on the top of the mounting platform (21). The scrapers (22) fit the outer wall of the cooling roller (3), and the top of the exhaust pipe (24) is fixedly connected to a feed hopper (25).

6. A plastic extrusion flat film drawing device according to claim 5, characterized in that: The cold air auxiliary component includes a sleeve (8), the sleeve (8) is fixedly installed on the outer wall of the air outlet pipe (7), the inner wall of the sleeve (8) is set as a symmetrical inclined surface, the bottom of the sleeve (8) is fixedly connected to a cover plate (9), the bottom of the cover plate (9) is symmetrically fixedly connected to two side plates (10), the bottom of the cover plate (9) is symmetrically fixedly connected to two guide blocks (11), the two guide blocks (11) are respectively located above the two cooling rollers (3), the outer walls of the two guide blocks (11) are both set as inclined surfaces, two diverter plates (12) are fixedly connected between the two side plates (10), and the two diverter plates (12) are both set as arcs.

7. A plastic extrusion flat film drawing device according to claim 6, characterized in that: The cooling component includes a gas delivery groove (28), which is opened inside the operating table (26) and is arranged in a ring shape. A plurality of gas outlet grooves (29) are equidistantly opened on the top and bottom of the inner wall of the operating table (26), and the gas outlet grooves (29) are communicated with the gas delivery groove (28). The inner wall of the gas delivery groove (28) is symmetrically fixedly connected to two diversion blocks (30), and the outer walls of the two diversion blocks (30) are arranged as symmetrical inclined surfaces. The outer wall of the operating table (26) is symmetrically fixedly connected to two second connecting pipes (31), one end of each of the two second connecting pipes (31) extends into the interior of the gas delivery groove (28), and a second gas delivery pipe (32) is fixedly connected between the two second connecting pipes (31).

8. The plastic extrusion flat film drawing device according to claim 7, characterized in that: The cold air recovery assembly includes a sleeve (33), the sleeve (33) is fixedly mounted on the top of the cover plate (9), the outer wall of the sleeve (33) is fixedly connected to a connecting hose (39), one end of the connecting hose (39) is communicated with the second gas pipeline (32), the inner wall of the sleeve (33) is provided with a first one-way valve (36), the first one-way valve (36) is opened from bottom to top, the inner wall of the connecting hose (39) is provided with a second one-way valve (40), the second one-way valve (40) is opened toward the operating The first one-way valve (36) is opened in the direction of the platform (26), and the inner wall of the sleeve (33) is slidably connected to a piston plate (35) located above the first one-way valve (36). The top of the piston plate (35) is fixedly connected to a piston rod (34). The top of the piston rod (34) passes through the sleeve (33). The output end of the motor (19) passes through the purification box (13) and is fixedly connected to a crank (37). One side of the crank (37) is rotatably connected to a connecting shaft (38), and the connecting shaft (38) is rotatably connected to the piston rod (34).

9. The plastic extrusion flat film drawing device according to claim 8, characterized in that: The top and bottom of the inner wall of the operating table (26) are fixedly connected to a baffle (41), the baffle (41) is arranged in an arc shape, the inner wall of the baffle (41) is fixedly connected to a rotating shaft (42), the outer wall of the rotating shaft (42) is rotatably connected to a pulley (43), and the top and bottom of the inner wall of the operating table (26) and the side away from the baffle (41) are fixedly connected to a flow block (44), and the outer walls of the two flow blocks (44) are arranged in an inclined surface.

10. A method for a plastic extrusion flat film drawing device, the method being applicable to the plastic extrusion flat film drawing device according to claim 9, characterized in that: The steps of this method are as follows: S1: Control the rotation of the two cooling rollers (3), and transport the flat film on the two cooling rollers (3), so that the flat film is cooled and shaped during transport, and use a plurality of slitting tools (27) to cut the flat film into wires; S2: Start the cold air pump (5) to extract air between the two cooling rollers (3) and discharge the cold air from the air outlet pipe (7) to cool and shape the flat film being transported below; S3: Start the motor (19) and control the piston plate (35) to move up and down reciprocatingly, and draw the cold air used for cooling into the operating table (26) to cool the slitting tool (27) in use.

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