Slitting device and method for plastic packaging bag production

Abstract

The invention provides a slitting device and method for plastic packaging bag production, and particularly relates to the technical field of plastic packaging bag processing.The slitting device comprises a machine body, a conveying table plate is fixedly arranged on the side, close to a collecting bin, of the machine body, and a tool rest is jointly and fixedly installed at the telescopic ends of the lower portions of two hydraulic air cylinders; a slitting knife is detachably connected to the bottom of the knife rest, a conveying belt used for conveying plastic packaging bags is arranged on the top face of the conveying table plate, and dust and chippings on the upper surface of the conveying belt located on the slitting portion are sucked through cooperation of a collecting barrel and other components and negative pressure formed on the two sides of the plastic packaging bags through cavity plates. The effect of collecting dust and chippings on the conveyor belt in real time is achieved, the cleaning effect on the dust and chippings on the surface of the conveyor belt is improved, and subsequent manual cleaning steps are reduced.

Description

Technical Field

[0001] The invention provides a slitting device and a method for producing plastic packaging bags, and particularly relates to the technical field of plastic packaging bag processing. Background Art

[0002] The slitting device for the production of plastic packaging bags is a processing device used to produce plastic packaging bags. After the processing of the plastic packaging bags is completed, they need to be quantitatively cut by a slitting machine, and the cut packaging bags are then uniformly packaged and shipped out of the factory.

[0003] The utility model with authorization announcement number CN215923574U discloses a slitting device for the production of plastic packaging bags. The slitting device is provided with a brush roller and a first exhaust fan, which can clean and collect impurities on the surface of the conveyor belt, replacing manual cleaning, thereby reducing the workload of workers. In addition, a first shell is provided to prevent workers from inhaling dust, thereby ensuring the health of workers.

[0004] However, the above-mentioned slitting device still has the following deficiencies in the actual production process: the slitting device is provided with a cleaning mechanism below the conveyor belt, but the cleaning mechanism is provided at the bottom of the conveyor belt, so the dust and debris on the conveyor belt can only be cleaned and collected when they reach the position of the cleaning mechanism, and the impurities on the conveyor belt located at the plastic packaging bag slitting position cannot be cleaned and collected in real time, which not only has a poor collection effect on dust and debris, but also causes dust and debris to adhere to the plastic packaging bag, affecting the final quality of the plastic packaging bag shipped out of the factory. At the same time, a dust suction structure is provided above the conveyor belt for conveying plastic packaging bags. When the dust suction structure is in the suction operation, an airflow will be generated above the plastic packaging bag. The disturbance of the airflow will cause the plastic packaging bag to be displaced. When the displaced plastic packaging bag is cut, the cutting part of the plastic packaging bag will be uneven, which will also affect the final quality of the plastic packaging bag shipped out of the factory after cutting.

[0005] Therefore, the present invention proposes a slitting device and method for producing plastic packaging bags to make up for and improve the deficiencies of the prior art. Summary of the invention

[0006] In view of the defects existing in the prior art, the present invention provides a slitting device and method for producing plastic packaging bags, which can effectively solve the related technical problems raised by the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention discloses a slitting device for producing plastic packaging bags, comprising a machine body, a collecting bin is fixedly arranged on one side above the machine body, a conveying table is fixedly arranged on one side of the machine body close to the collecting bin, two hydraulic cylinders are symmetrically fixedly arranged on the top of the machine body close to the conveying table, a knife holder is fixedly arranged on the telescopic ends below the two hydraulic cylinders, a slitting knife is detachably connected to the bottom of the knife holder, a conveyor belt for conveying plastic packaging bags is arranged on the top surface of the conveying table, conveying rollers are rotatably connected to the top surface of the conveying table and on both sides of the conveying belt, and matching processing mechanisms are symmetrically arranged on the top surface of the conveying table and on both sides of the conveying belt; The matching processing mechanism includes two ring plates fixedly connected to the surface of one side of the tool holder close to the machine body, and an annular disk is provided at one end of the two ring plates away from the tool holder, and a screw rod is rotatably connected to the inner surface of the machine body close to the annular disk. The annular disks in the two ring plates are respectively threadedly connected to the corresponding screw rods, and a combined connecting rod is rotatably connected to the eccentric position of the bottom of the two screw rods. A collecting cylinder is fixedly provided on the inner surface of the machine body close to the combined connecting rod, and a belt disk rod is slidably connected to the inside of the two collecting cylinders. The belt disk rod and the collecting cylinder form a piston cylinder structure, and one end of the belt disk rod close to the combined connecting rod extends to the outside of the collecting cylinder, and is rotatably connected to the end of the combined connecting rod away from the screw rod. The bottoms of the two collecting cylinders away from the combined connecting rod are connected to a suction Tube, a one-way air inlet valve is provided on the portion where the suction pipe is connected to the collecting cylinder, two cavity plates are symmetrically fixedly arranged on the top surface of the conveying table and on both sides of the conveyor belt, the two sides of the cavity plates away from each other are respectively connected with the corresponding suction pipes, and the surfaces of the two cavity plates close to each other are provided with suction nozzles, and the suction nozzles are evenly arranged in multiple numbers and distributed up and down on the surfaces of the two cavity plates close to each other, the ends of the two collecting cylinders away from the screw rod are connected with discharge pipes, and the portions where the discharge pipes are connected with the corresponding collecting cylinders are respectively provided with one-way air outlet valves, a fixing box is fixedly arranged on the side of the top surface of the body close to the discharge pipe, and the two fixing boxes are inserted with collecting boxes inside, and the end of the discharge pipe away from the collecting cylinder passes through the fixing box and is connected with the inside of the collecting box.

[0008] Preferably, a pipe groove for the suction pipe to pass through is provided on the top surface of the conveying table at a position corresponding to the suction pipe, and one end of the suction pipe close to the cavity plate is located below the knife holder and the slitting knife when they move downward to the final position.

[0009] Preferably, a through hole is provided at the portion where the collecting box is connected to the discharge pipe, and one end of the discharge pipe away from the collecting cylinder is horizontally attached to the outer surface of the collecting box corresponding to the through hole.

[0010] Preferably, the fixing box and the collecting box are both made of transparent acrylic.

[0011] Preferably, an active smoothing mechanism is symmetrically arranged on both sides of the tool holder near the bottom of the hydraulic cylinder, and the active smoothing mechanism includes four block rods fixedly connected to the tool holder, the four block rods are symmetrically arranged on the outer walls of both sides of the tool holder in pairs, and the four block rods are provided with a rectangular block at one end away from the tool holder, and a displacement plate is provided on the side of the four block rods away from the tool holder, and an inclined groove is opened on the displacement plate, and the rectangular blocks in the four block rods are slidably connected in the adjacent inclined grooves, and the outer walls of the four displacement plates on the side away from the block rods are fixedly provided with concave plates, and the four concave plates are elastically connected with smoothing shafts, and the bottoms of the four displacement plates are fixedly provided with protrusions, and horizontal groove frames are fixedly connected at the top surface of the conveying table and at positions corresponding to the four protrusions, and a horizontal spring is connected to the inside of the horizontal groove frame, and a sliding plate is fixedly connected to the end of the horizontal spring close to the protrusion, and the sliding plate is slidably connected to the inside of the horizontal groove frame.

[0012] Preferably, the rectangular block is in contact with the groove surface at the top of the inclined groove in an initial position, and two rectangular clamping plates are symmetrically arranged on the outside of the two sides of the inclined groove of the rectangular block.

[0013] Preferably, side grooves are respectively provided on both sides of the four concave plates, and side blocks are respectively arranged at positions of the smoothing shaft corresponding to the side grooves. The side blocks are slidably connected in the side grooves, and a vertical spring is connected between the top surface of the side block and the groove surface at the top of the side groove.

[0014] Preferably, a collecting and processing mechanism is provided on the side of the collecting bin close to the conveying table, and the collecting and processing mechanism includes two limit plates symmetrically fixedly connected to the bottom surface of the inner part of the collecting bin, a curved plate is fixedly connected to the side of the tool holder close to the collecting bin and close to the limit plate, and the end of the curved plate away from the tool holder is fixedly connected to a rack 1, a vertical groove frame is fixedly connected to the side of the top surface of the collecting bin close to the curved plate, and a rack 2 is slidably connected inside the vertical groove frame, a mounting plate is fixedly provided on the side of the top surface of the collecting bin close to rack 1, and a gear is rotatably connected to the side of the mounting plate close to rack 1, and the rack 1 and rack 2 are respectively meshed with two sides of the gear, and a spring telescopic rod is fixedly connected to the end of the rack 2 away from the vertical groove frame, and a combined pressure rod is fixedly connected to the bottom of the telescopic end of the spring telescopic rod.

[0015] A slitting method for producing plastic packaging bags, using the slitting device for producing plastic packaging bags as described above, the method comprising the following steps: Step 1: First, the staff places the rolled plastic packaging bags to be cut on the side of the machine body away from the collecting bin, and passes one end of the plastic packaging bags to be cut between the conveyor belt and the conveyor roller.

[0016] Step 2: Then, the staff starts the conveyor belt to transport the plastic packaging bags to be cut through the controller, so that the cutting part of the plastic packaging bags to be cut corresponds to the cutting knife, and stops the conveyor belt.

[0017] Step 3: Then, the hydraulic cylinder is started through the controller, and the knife holder and the slitting knife are driven downward by the telescopic end thereof to slit the plastic packaging bags to be slit.

[0018] Step 4: After the slitting is completed, the telescopic end of the hydraulic cylinder is controlled by the controller to move upward, driving the slitting knife to move upward synchronously, and then the conveyor belt is started to continue conveying, and the slitting plastic packaging bags are sent to the collection bin. According to this step, the rolled plastic packaging bags can be slid and collected one by one.

[0019] Step 5: Based on the above step 3, as the tool holder moves downward, the belt ring plate moves downward synchronously, which in turn causes the lead screw to continue to rotate, and in conjunction with the movement of the combined connecting rod, the collecting cylinder, and the belt reel rod, the dust and debris attached to and falling on the corresponding cutting parts of the conveyor belt are automatically collected in real time through the suction pipe, cavity plate, discharge pipe, and collection box.

[0020] Step 6: Based on the above step 3, as the tool holder moves downward, the block rod is driven to move synchronously, and the displacement plate, inclined groove and horizontal groove frame are coordinated to cause the four smoothing shafts to press the two sides of the plastic packaging bag cutting part to move away from each other horizontally, ensuring the flatness of the plastic packaging bag cutting part.

[0021] Step seven: Based on the above steps three and four, the cut plastic packaging bags are sent to the collection bin. As the knife holder moves up and down, the curved plate and rack one are driven to move synchronously. The rack one drives the gear to rotate, and the rotation of the gear drives rack two, the spring telescopic rod, and the combined pressure rod to reciprocate up and down. The cut plastic packaging bags are compacted by the downward movement of the combined pressure rod.

[0022] Preferably, in the process of the combined pressure rod pressing the cut plastic packaging bag in step seven, the telescopic end of the spring telescopic rod adaptively retracts, thereby driving the combined pressure rod to move upward, so as to automatically adapt as the collected thickness of the cut plastic packaging bag gradually increases.

[0023] Beneficial effects of the present invention: The slitting device for producing plastic packaging bags utilizes cavity plates symmetrically arranged on both sides of the conveyor belt. When the telescopic end of the hydraulic cylinder drives the slitting knife downward to slit the plastic packaging bags, the dust and debris on the upper surface of the conveyor belt at the slitting position are sucked out by means of negative pressure through the cooperation of the collecting cylinder and other components, so as to achieve the effect of collecting the dust and debris on the conveyor belt in real time, improve the cleaning effect of the dust and debris on the surface of the conveyor belt, reduce the subsequent manual cleaning steps, and at the same time, the cleaning method can achieve the cleaning of dust and debris by only relying on the slitting action of the slitting knife; The suction of the two cavity plates will suck away the dust and debris attached to the plastic packaging bags, ensuring the hygienic effect of the plastic packaging bags; The fixed box and the collecting box are convenient for the staff to timely observe the amount of dust and debris collected in the collecting box, so that the staff can manually pull the collecting box out of the fixed box horizontally for subsequent processing. At the same time, the sucked dust and debris are collected by the collecting box, which also prevents dust from adhering to the outer surface of the slitting device, thereby ensuring the hygienic effect of the plastic packaging bag during the transportation and slitting process; Four smoothing shafts are used to press the two sides of the cutting part of the plastic packaging bag to be cut and move them horizontally away from each other, which can not only avoid the deviation of the plastic packaging bag caused by the conveyor belt, but also use the horizontal movement of the smoothing shafts to smooth the two sides of the cutting part of the plastic packaging bag to be cut, so as to avoid the uneven and uneven cuts of the plastic packaging bag to be cut due to wrinkles on the surface during cutting, so as to further improve the cutting effect of the plastic packaging bag by the cutting device; The elasticity of the vertical spring can provide elastic adaptability for the smoothing shaft, and it can also be applied to plastic packaging bags of different thicknesses. The smooth outer surface of the smoothing shaft can also avoid the smoothing shaft from pressing on the upper surface of the plastic packaging bag and causing wear during the movement, thus ensuring the quality of the plastic packaging bag. Two limit plates are used to prevent the plastic packaging bags from being collected unevenly after being cut. At the same time, a combined pressure rod is used to apply downward pressure to the plastic packaging bags after being cut. Before the next cutting work starts, the combined pressure rod is always pressed on the upper surface of the plastic packaging bags after being cut. This can prevent the plastic packaging bags from being scattered to the outside of the collection bin due to the light material of the plastic packaging bags, which are easily shaken and offset during the operation of the cutting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a main perspective structural diagram of the present invention; Figure 2 It is a three-dimensional structural diagram of another viewing angle of the present invention; Figure 3 It is a partial three-dimensional structural diagram of the relevant components of the conveying table of the present invention; Figure 4 It is a partial three-dimensional structural diagram of the relevant components of the conveyor belt of the present invention; Figure 5 It is a partial three-dimensional structural diagram of the relevant parts of the ring plate of the present invention; Figure 6 This is a structural diagram of the local position relationship between the suction nozzle and the conveyor belt of the present invention; Figure 7 It is a partial three-dimensional structural diagram of the relevant parts of the piston cylinder of the present invention; Figure 8 It is a partial three-dimensional structural diagram of the fixing box of the present invention in a cut-away state; Fig. 9 It is a partial three-dimensional structural diagram of the relevant components of the block rod of the present invention; Fig.10 It is an exploded three-dimensional structural diagram of the relevant parts of the block rod of the present invention; Fig.11 It is a partial three-dimensional structural diagram of the relevant components of the limiting plate of the present invention; Fig.12 It is a partial three-dimensional structural diagram of the vertical slot frame and the spring telescopic rod and related parts of the present invention.

[0025] The numbers in the figure represent: 1. Machine body; 11. Collection bin; 12. Conveying table; 121. Conveyor belt; 122. Conveying roller; 13. Hydraulic cylinder; 14. Knife holder; 15. Slitting knife; Matching treatment mechanism: 21, plate with ring; 22, screw rod; 23, combined connecting rod; 24, collecting tube; 25, suction tube; 26, cavity plate; 27, rod with reel; 28, discharge tube; 29, fixed box; 210, collecting box; Active smoothing mechanism: 31, block rod; 32, displacement plate; 33, inclined groove; 34, concave plate; 341, side groove; 342, side block; 343, vertical spring; 35, smoothing shaft; 36, convex block; 37, horizontal groove frame; 38, horizontal spring; 39, sliding plate; Collection and processing mechanism: 41, limit plate; 42, curved plate; 43, rack one; 44, vertical slot frame; 45, rack two; 46, mounting plate; 47, gear; 48, spring telescopic rod; 49, combined pressure rod. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments.

[0027] Embodiment 1: Figures 1 to 3As shown, a slitting device for the production of plastic packaging bags includes a body 1, a collecting bin 11 is fixedly provided on one side above the body 1, and a side of the body 1 away from the collecting bin 11 can be used to place a roll of plastic packaging bags. A conveying table 12 is fixedly provided on one side of the body 1 close to the collecting bin 11, and two hydraulic cylinders 13 are symmetrically fixedly installed on the top of the body 1 close to the conveying table 12, and a knife holder 14 is fixedly installed on the telescopic ends below the two hydraulic cylinders 13, and a slitting knife 15 is detachably connected to the bottom of the knife holder 14, and the slitting knife 15 can be threadedly connected to the knife holder 14 through bolts and nuts. A conveyor belt 121 for conveying plastic packaging bags is provided on the top surface of the conveyor plate 12, and the conveyor belt 121 is an existing structure and is not described here. Conveying rollers 122 are rotatably connected to the top surface of the conveyor plate 12 and located on both sides of the conveyor belt 121, and the gap between the conveyor rollers 122 and the conveyor belt 121 can allow plastic packaging bags to pass horizontally. Note: The machine body 1 is also provided with a controller, which can control the conveyor belt 121 and the hydraulic cylinder 13 to start. The conveyor belt 121 is used to transport plastic packaging bags, transport them to the bottom of the slitting knife 15 and stop transporting them, and then start the hydraulic cylinder 13 to drive the slitting knife 15 to move downward to slit the plastic packaging bags. After slitting, the plastic packaging bags after slitting are transported by the conveyor belt 121 to the collection bin 11 to collect the plastic packaging bags.

[0028] As an improvement, Figure 1 , Figures 5 to 8As shown, the top surface of the conveying table 12 and the two sides of the conveyor belt 121 are symmetrically provided with a matching processing mechanism, which includes two ring plates 21 fixedly connected to the surface of the tool holder 14 on one side close to the machine body 1, and specifically, the two ring plates 21 are located on the side of the tool holder 14 close to the hydraulic cylinder 13. The two ring plates 21 are provided with a circular ring disk at one end away from the tool holder 14, and a screw rod 22 is correspondingly connected to the inner surface of the machine body 1 close to the circular ring disk. The number of turns of the thread on the outer ring surface of the screw rod 22 is set to multiple turns. Through the cooperation between the circular ring disk and the screw rod 22, the screw rod 22 can be driven to rotate multiple turns. The annular disks in the two ring plates 21 are respectively threadedly connected to the corresponding screw rods 22, and the eccentric positions at the bottom of the two screw rods 22 are rotatably connected with a combined connecting rod 23. A collecting cylinder 24 is correspondingly fixedly arranged on the inner surface of the body 1 close to the combined connecting rod 23. The insides of the two collecting cylinders 24 are slidably connected with a reel rod 27, and the reel rod 27 and the collecting cylinder 24 form a piston cylinder structure. The end of the reel rod 27 close to the combined connecting rod 23 extends to the outside of the collecting cylinder 24, and is rotatably connected to the end of the combined connecting rod 23 away from the screw rod 22. Connection, specifically, the above-mentioned combined connecting rod 23 is composed of a short rod and a long rod, and the short rod and the long rod are rotationally connected; the belt reel rod 27 is composed of a rod body and a piston disk, wherein the rod body of the belt reel rod 27 passes through one end of the collecting cylinder 24 and is fixedly connected with the piston disk, the piston disk and the collecting cylinder 24 constitute a piston cylinder structure, and the end of the rod body close to the combined connecting rod 23 extends to the outside of the collecting cylinder 24; wherein the end of the short rod away from the long rod is rotationally connected to the eccentric position at the bottom of the screw rod 22, and the end of the long rod away from the short rod is rotationally connected to the rod body of the belt reel rod 27. The bottoms of the two collecting cylinders 24 away from one end of the combined connecting rod 23 are both connected with a suction pipe 25, and a one-way air intake valve is provided at the portion where the suction pipe 25 is connected to the collecting cylinder 24. Two cavity plates 26 are symmetrically fixed on the top surface of the conveying table 12 and located on both sides of the conveyor belt 121. The sides of the two cavity plates 26 away from each other are respectively connected with the corresponding suction pipes 25, and the surfaces of the two cavity plates 26 close to each other are both provided with suction nozzles. There are multiple suction nozzles evenly arranged and distributed up and down on the surfaces of the two cavity plates 26 close to each other. Specifically, the multiple suction nozzles located at the bottom are horizontally facing the upper surface of the conveyor belt 121, and the multiple suction nozzles located at the top are horizontally facing the upper surface of the plastic packaging bag. A tube groove for the suction tube 25 to pass through is provided on the top surface of the conveying table 12 at a position corresponding to the suction tube 25. The end of the suction tube 25 close to the cavity plate 26 is located below the tool holder 14 and the slitting knife 15 when they move downward to the final position. In other words, the part of the suction tube 25 located below the tool holder 14 and the slitting knife 15 will not contact the suction tube 25 when the tool holder 14 and the slitting knife 15 move downward to the final position.The ends of the two collecting tubes 24 away from the screw rod 22 are both connected with a discharge pipe 28, and the parts where the discharge pipe 28 is connected to the corresponding collecting tube 24 are respectively provided with a one-way air outlet valve. A fixing box 29 is fixedly provided on one side of the top surface of the body 1 close to the discharge pipe 28, and the insides of the two fixing boxes 29 are plugged with a collecting box 210. The ends of the discharge pipe 28 away from the collecting tube 24 pass through the fixing box 29 and are connected to the inside of the collecting box 210. The parts where the collecting box 210 is connected to the discharge pipe 28 are provided with a through hole, and the ends of the discharge pipe 28 away from the collecting tube 24 are horizontally attached to the outer surface of the collecting box 210 corresponding to the through hole. Specifically, the discharge pipe 28 is indirectly connected to the inside of the collecting box 210 through the through hole. The fixing box 29 and the collecting box 210 are both made of transparent acrylic.

[0029] During use: Considering that dust and debris may adhere to the surface of the conveyor belt 121 during the conveying operation, and that the surface of the plastic packaging bag may also adhere to some debris due to inadequate cleaning of the equipment during the preparation process and contact with other objects during the transportation process. When the hydraulic cylinder 13 drives the knife holder 14 and the slitting knife 15 to move downward, the packaging bag will be cut, and the two ring plates 21 will be driven to move downward synchronously. As the two ring plates 21 move downward, the corresponding screw rods 22 are driven to rotate through their respective ring plates, and then the combined connecting rod 23 is driven to rotate synchronously through the rotation of the screw rod 22. As the combined connecting rod 23 rotates, the piston disk in the disk rod 27 will be prompted to perform horizontal reciprocating motion inside the collecting tube 24. When the piston disk moves horizontally in the direction close to the screw rod 22, the one-way air intake valve is opened at this time, so that air is sucked through the suction pipe 25 and the cavity plate 26. Under the action of negative pressure, dust and debris attached to the conveyor belt 121 and located at the slitting position are sucked into the collecting tube 24. Two cavity plates 26 are symmetrically arranged, and are symmetrically arranged on both sides of the conveyor belt 121, so dust and debris can be sucked from both sides of the conveyor belt 121 at the same time. When the piston disc is displaced horizontally in a direction away from the screw rod 22, the one-way air inlet valve is closed and the one-way air outlet valve is opened, so that the dust and debris sucked into the collection cylinder 24 are sent to the collection box 210 through the discharge pipe 28 for collection.

[0030] Therefore, by utilizing the cavity plates 26 symmetrically arranged on both sides of the conveyor belt 121, when the telescopic end of the hydraulic cylinder 13 drives the slitting knife 15 downward to cut the plastic packaging bags, the dust and debris on the upper surface of the conveyor belt 121 located at the cutting position are sucked out by means of negative pressure through the cooperation of the collecting tube 24 and other components, so as to achieve the effect of real-time collection of dust and debris on the conveyor belt 121, and the effect of cleaning the dust and debris on the surface of the conveyor belt 121, thereby reducing the subsequent manual cleaning steps. At the same time, this cleaning method can clean the dust and debris by relying solely on the cutting action of the slitting knife 15.

[0031] In addition, the two cavity plates 26 are also located on both sides of the plastic packaging bag at the position to be cut, so that the suction of the two cavity plates 26 can suck away dust and debris attached to the plastic packaging bag, ensuring the hygienic effect of the plastic packaging bag.

[0032] After the dust and debris are sent into the collection box 210, the fixed box 29 and the collection box 210 made of transparent acrylic material make it easy for the staff to promptly view the amount of dust and debris collected inside the collection box 210, so that the staff can manually pull the collection box 210 out of the fixed box 29 horizontally for subsequent processing. At the same time, the collection box 210 is used to collect the sucked dust and debris, and dust is prevented from adhering to the outer surface of the slitting device, thereby ensuring the hygienic effect of the plastic packaging bag during the transportation and slitting process.

[0033] After a plastic packaging bag is cut, the controller controls the telescopic end of the hydraulic cylinder 13 to drive the slitting knife 15 to automatically retract upward, and then starts the conveyor belt 121 to send the cut plastic packaging bag into the collection bin 11. Then, as the conveyor belt 121 continues to transport, the next plastic packaging bag to be cut is transported to the bottom of the slitting knife 15 for the next cutting, and the rolled plastic packaging bags can be continuously cut one by one in this cycle.

[0034] Embodiment 2: Figure 1 , Figures 9 and 10As shown, the above-mentioned slitting device for the production of plastic packaging bags also includes an active smoothing mechanism symmetrically arranged on both sides of the tool holder 14 near the bottom of the hydraulic cylinder 13, the active smoothing mechanism includes four block rods 31 fixedly connected to the tool holder 14, the four block rods 31 are symmetrically arranged on the outer walls of both sides of the tool holder 14 in pairs, and the four block rods 31 are each provided with a rectangular block at one end away from the tool holder 14, and a displacement plate 32 is each provided on the side of the four block rods 31 away from the tool holder 14, and an inclined groove 33 is opened on the displacement plate 32. In the initial position, the rectangular block is in contact with the groove surface at the top of the inclined groove 33, and two rectangular clamping plates are symmetrically arranged on the parts of the rectangular blocks located outside the two sides of the inclined groove 33, and the rectangular clamping plates are in contact with the outer surface of the displacement plate 32. The two rectangular clamping plates and the rectangular block are used to ensure that the displacement plate 32 will not rotate with the rectangular block as a fulcrum, and at the same time, it is also ensured that the displacement plate 32 will not horizontally displace in the direction of approaching or away from the block rod 31. The rectangular blocks in the four block rods 31 are all slidably connected in the adjacent inclined grooves 33. The outer walls of the four displacement plates 32 away from the block rods 31 are all fixedly provided with concave plates 34. The four concave plates 34 are elastically connected with smoothing shafts 35. The outer ring surface of the smoothing shafts 35 is provided with a smooth skin layer. The smoothing shafts 35 do not contact the upper surface of the conveyor belt 121 in the initial position, and the plastic packaging bags on the conveyor belt 121 do not contact the smoothing shafts 35 before being cut, so as to avoid affecting the transportation of the plastic packaging bags. There are four smoothing shafts 35, which are symmetrically arranged on both sides of the slitting knife 15 in pairs, and the knife holder 14 and the slitting knife 15 will not contact the two adjacent smoothing shafts 35 during the downward movement. The bottom of the four displacement plates 32 are fixedly provided with protrusions 36, and the top surface of the conveying table 12 and the positions corresponding to the four protrusions 36 are fixedly connected with horizontal groove frames 37. The interior of the horizontal groove frame 37 is connected with a horizontal spring 38, and the end of the horizontal spring 38 close to the protrusion 36 is fixedly connected with a sliding plate 39. The sliding plate 39 is slidably connected to the interior of the horizontal groove frame 37. The sliding plate 39 is located directly below the corresponding protrusion 36, and after the protrusion 36 moves down to the final position, when horizontal displacement occurs, it can drive the sliding plate 39 to move horizontally along the horizontal groove frame 37.

[0035] Furthermore, if Fig.10 As shown, side grooves 341 are respectively provided on both sides of the four concave plates 34, and side blocks 342 are respectively arranged at positions corresponding to the side grooves 341 of the smoothing shaft 35. The side blocks 342 are slidably connected in the side grooves 341, and a vertical spring 343 is connected between the top surface of the side block 342 and the groove surface at the top of the side groove 341. When in use, the elasticity of the vertical spring 343 can provide elastic adaptability for the smoothing shaft 35, and it can also be suitable for plastic packaging bags of different thicknesses. The smooth leather on the outer surface of the smoothing shaft 35 also prevents the smoothing shaft 35 from pressing on the upper surface of the plastic packaging bag and causing wear during movement, thereby ensuring that the plastic packaging bag can move smoothly.

[0036] During use: During the process of the slitting knife 15 slitting the plastic packaging bag, as the knife holder 14 moves downward, the block rod 31 will also be driven to move downward synchronously. After the block rod 31 moves downward, the displacement plate 32 will move downward synchronously under the action of gravity and contact the upper surfaces of both sides of the plastic packaging bag to be slid on the conveyor belt 121. At this time, the four smoothing shafts 35 will be pressed on both sides of the upper surface of the plastic packaging bag to be slid, that is, pressed on both sides of the cutting position of the plastic packaging bag to be slid near the slitting knife 15. At the same time, the protrusion 36 will collide with the bottom groove surface of the horizontal groove frame 37. At this time, the slitting knife 15 has not yet contacted the plastic packaging bag for slitting. As the knife holder 14 and the slitting knife 15 continue to move downward, the rectangular block in the block rod 31 will squeeze the groove surface of the displacement plate 32. Under the guidance of the displacement plate 32, the protrusion 36 will gradually move horizontally along the trajectory of the horizontal groove frame 37 in the direction away from the smoothing shaft 35. During the process, the protrusion 36 will also push the sliding plate 39 to move synchronously and cause the horizontal spring 38 to be gradually compressed. Thus, the displacement plate 32, the concave plate 34, and the smoothing shaft 35 are driven to move synchronously through the protrusion 36. The smoothing shaft 35 will press the upper surface of the plastic packaging bag to be cut horizontally away from each other, and finally when the slitting knife 15 contacts the plastic packaging bag to be cut for slitting, the four smoothing shafts 35 are still pressed on both sides of the upper surface of the plastic packaging bag to ensure the stability of the plastic packaging bag on the conveyor belt 121 and avoid deviation during transmission.

[0037] Therefore, in the process of the slitting knife 15 slitting the plastic packaging bag, four smoothing shafts 35 are used to press the two sides of the slitting position of the plastic packaging bag to be slid and move them horizontally away from each other, which can not only avoid the plastic packaging bag from being offset due to the conveyor belt 121, but also use the horizontal movement of the smoothing shafts 35 to smooth the two sides of the slitting position of the plastic packaging bag to be slid, so as to avoid the plastic packaging bag to be slid having uneven and smooth cuts due to wrinkles on the surface during slitting, so as to further improve the slitting effect of the slitting device on the plastic packaging bag.

[0038] When the slitting is completed, the knife holder 14 and the slitting knife 15 move upward, and the displacement plate 32 is driven to move upward synchronously through the block rod 31, and the sliding plate 39 is driven to reset in the opposite direction under the action of the rebound force of the horizontal spring 38. After the displacement plate 32 moves upward and resets, the four smoothing shafts 35 will not affect the subsequent conveying of the plastic packaging bags, so as to ensure that the conveyor belt 121 can normally convey the plastic packaging bags.

[0039] Embodiment 3: Figure 1 , Figure 11 to Figure 12As shown, the above-mentioned slitting device for the production of plastic packaging bags also includes a collecting and processing mechanism arranged on the side of the collecting bin 11 close to the conveying table 12, the collecting and processing mechanism includes two limit plates 41 symmetrically fixedly connected to the inner bottom surface of the collecting bin 11, the spacing between the two limit plates 41 is greater than the width of the plastic packaging bag, a curved plate 42 is fixedly connected to the side of the tool holder 14 close to the collecting bin 11 and close to the limit plate 41, a rack 1 43 is fixedly connected to the end of the curved plate 42 away from the tool holder 14, a vertical groove frame 44 is fixedly connected to the side of the top surface of the collecting bin 11 close to the curved plate 42, a rack 2 45 is slidably connected inside the vertical groove frame 44, a mounting plate 46 is fixedly provided on the side of the top surface of the collecting bin 11 close to the rack 1 43, a gear 47 is rotatably connected to the mounting plate 46 close to the side of the rack 1 43, the rack 1 43 and the rack 2 45 are respectively meshed with the two sides of the gear 47, and initially, the rack 1 43 is located above the rack 2 45. One end of the rack 2 45 away from the vertical groove frame 44 is fixedly connected to a spring telescopic rod 48, and the bottom of the telescopic end of the spring telescopic rod 48 is fixedly connected to a combined pressure rod 49, and a built-in spring is connected between the top of the telescopic end of the spring telescopic rod 48 and the spring telescopic rod 48. The combined pressure rod 49 is composed of a plurality of round rods arranged at equal intervals, and the plurality of round rods are fixedly connected by a concave rod, wherein the top of the concave rod is fixedly connected to the bottom of the telescopic end of the spring telescopic rod 48.

[0040] When in use: In addition, in the process of the knife holder 14 and the slitting knife 15 moving downward to cut the plastic packaging bags, the curved plate 42 and the rack 1 43 will be driven to move downward synchronously. As the rack 1 43 moves downward, the gear 47 will be driven to rotate, thereby driving the rack 2 45 to move upward along the trajectory of the vertical groove frame 44, thereby driving the spring telescopic rod 48 and the combined pressure rod 49 to move upward synchronously, and finally when the slitting knife 15 reaches the slitting position, the combined pressure rod 49 is also located above the two limit plates 41, and there is a certain distance between the top surfaces of the two limit plates 41, that is, when the plastic packaging bags that have been cut are transported by the conveyor belt 121 and sent to the collecting bin 11, the combined pressure rod 49 will not hinder the passage of the cut plastic packaging bags, and the cut plastic packaging bags sent to the collecting bin 11 will be limited by the two limit plates 41, so that the cut plastic packaging bags are located between the two limit plates 41. After the slitting is completed, the upward movement of the knife holder 14 will drive the rack 1 43 to move upward synchronously, thereby driving the rack 2 45, the spring telescopic rod 48, and the combined pressure rod 49 to move downward in the opposite direction through the gear 47, so that the combined pressure rod 49 presses on the upper surface of the slitting plastic packaging bag. As the amount of slitting plastic packaging bags collected in the collection bin 11 gradually increases, as the combined pressure rod 49 contacts the slitting plastic packaging bags, the telescopic end of the spring telescopic rod 48 will adaptively retract upward, thereby facilitating the continuous slitting of the plastic packaging bags. Moreover, under the elastic force of the built-in spring, the combined pressure rod 49 will always exert pressure on the upper surface of the slitting plastic packaging bag.

[0041] Therefore, after the plastic packaging bags are cut and sent into the collection bin 11, two limit plates 41 are used to prevent the cut plastic packaging bags from being unevenly collected. At the same time, the combined pressure rod 49 is used to apply downward pressure to the cut plastic packaging bags. Before the next cutting operation begins, the combined pressure rod 49 is always pressed on the upper surface of the cut plastic packaging bags. This prevents the plastic packaging bags from being scattered to the outside of the collection bin 11 due to the light material of the plastic packaging bags, which are easily shaken and offset during the operation of the cutting device.

[0042] Embodiment 4: Based on the slitting device for producing plastic packaging bags in the above-mentioned embodiments 1 to 4, a slitting method for producing plastic packaging bags is now proposed, and the method comprises the following steps: Step 1: First, a staff member places the rolled plastic packaging bag to be cut on a side of the machine body 1 away from the collecting bin 11 , and passes one end of the plastic packaging bag to be cut through between the conveyor belt 121 and the conveying roller 122 .

[0043] Step 2: Then, the staff starts the conveyor belt 121 through the controller to transport the plastic packaging bag to be cut, so that the cutting position of the plastic packaging bag to be cut corresponds to the cutting knife 15, and stops the conveyor belt 121 from transporting.

[0044] Step 3: Subsequently, the hydraulic cylinder 13 is started through the controller, and the knife holder 14 and the slitting knife 15 are driven to move downward through the telescopic end thereof to perform slitting processing on the plastic packaging bags to be slit.

[0045] Step 4: After the slitting is completed, the telescopic end of the hydraulic cylinder 13 is controlled by the controller to move upward, driving the slitting knife 15 to move upward synchronously, and then the conveyor belt 121 is started to continue conveying, and the slitting plastic packaging bags are sent to the collection bin 11. According to this step, the rolled plastic packaging bags can be slid and collected one by one.

[0046] Step 5: Based on the above step 3, as the tool holder 14 moves downward, the belt ring plate 21 is driven to move downward synchronously, and then the screw rod 22 is prompted to continue to rotate, and in conjunction with the movement of the combined connecting rod 23, the collecting cylinder 24, and the belt reel rod 27, the dust and debris attached to and falling on the corresponding cutting parts of the conveyor belt 121 are automatically collected in real time through the suction pipe 25, the cavity plate 26, the discharge pipe 28 and the collection box 210.

[0047] Step six: Based on the above step three, as the tool holder 14 moves downward, the block rod 31 is driven to move synchronously, and the displacement plate 32, the inclined groove 33 and the horizontal groove frame 37 are coordinated to cause the four smoothing shafts 35 to press the two sides of the plastic packaging bag cutting part to move away horizontally, thereby ensuring the flatness of the plastic packaging bag cutting part.

[0048] Step seven: Based on the above steps three and four, the cut plastic packaging bags are sent to the collection bin 11. As the knife holder 14 moves up and down, the curved plate 42 and the rack 1 43 are driven to move synchronously. The rack 1 43 drives the gear 47 to rotate. The rotation of the gear 47 drives the rack 2 45, the spring telescopic rod 48, and the combined pressure rod 49 to reciprocate up and down. The cut plastic packaging bags are compacted by the downward movement of the combined pressure rod 49.

[0049] Step 8: Repeat the above steps 1 to 7 to cut the batches of rolled plastic packaging bags.

[0050] Furthermore, in the process of the combined pressure rod 49 pressing the cut plastic packaging bag in the above step seven, the telescopic end of the spring telescopic rod 48 adaptively retracts, thereby driving the combined pressure rod 49 to move upward, so as to automatically adapt to the gradual increase in the collected thickness of the cut plastic packaging bags.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A slitting device for producing plastic packaging bags, comprising a body (1), a collecting bin (11) being fixedly arranged on one side above the body (1), a conveying table (12) being fixedly arranged on one side of the body (1) close to the collecting bin (11), two hydraulic cylinders (13) being symmetrically fixedly installed on the top of the body (1) close to the conveying table (12), a knife holder (14) being fixedly installed on the telescopic ends below the two hydraulic cylinders (13), a slitting knife (15) being detachably connected to the bottom of the knife holder (14), a conveyor belt (121) for conveying plastic packaging bags being arranged on the top surface of the conveying table (12), conveying rollers (122) being rotatably connected to the top surface of the conveying table (12) and located on both sides of the conveyor belt (121), and characterized in that: A matching processing mechanism is symmetrically arranged on the top surface of the conveying platform (12) and on both sides of the conveyor belt (121); The matching processing mechanism comprises two ring plates (21) fixedly connected to the surface of the tool holder (14) on one side close to the machine body (1), and the two ring plates (21) are provided with a circular ring disk at one end away from the tool holder (14). A screw rod (22) is rotatably connected to the inner surface of the machine body (1) on the side close to the circular ring disk. The circular ring disks in the two ring plates (21) are respectively threadedly connected to the corresponding screw rods (22). The eccentric positions at the bottoms of the two screw rods (22) are rotatably connected to a combined connecting rod (23). The machine body (1) is close to the tool holder (14). A collecting cylinder (24) is fixedly arranged on the inner surface of one side near the combined connecting rod (23), and a belt reel rod (27) is slidably connected to the inside of the two collecting cylinders (24). The belt reel rod (27) and the collecting cylinder (24) form a piston cylinder structure. The end of the belt reel rod (27) near the combined connecting rod (23) extends to the outside of the collecting cylinder (24) and is rotatably connected to the end of the combined connecting rod (23) away from the screw rod (22). The bottoms of the two collecting cylinders (24) away from the combined connecting rod (23) are connected to a suction pipe. A one-way air inlet valve is provided at a portion where the suction pipe (25) is connected to the collecting cylinder (24); two cavity plates (26) are symmetrically fixedly provided on the top surface of the conveying table (12) and located on both sides of the conveyor belt (121); the two cavity plates (26) are connected to the corresponding suction pipe (25) on the sides away from each other; suction nozzles are provided on the surfaces of the two cavity plates (26) on the sides close to each other; a plurality of suction nozzles are evenly provided and are distributed up and down on the sides close to each other of the two cavity plates (26). On the side surface, one end of the two collecting tubes (24) away from the screw rod (22) is connected to a discharge pipe (28), and a one-way air outlet valve is provided at the portion where the discharge pipe (28) is connected to the corresponding collecting tube (24). A fixing box (29) is fixedly provided on one side of the top surface of the machine body (1) close to the discharge pipe (28), and a collecting box (210) is inserted into the interior of the two fixing boxes (29). One end of the discharge pipe (28) away from the collecting tube (24) passes through the fixing box (29) and is connected to the interior of the collecting box (210).

2. The slitting device for producing plastic packaging bags according to claim 1, characterized in that: A tube placement groove for the suction tube (25) to pass through is provided on the top surface of the conveying table (12) at a position corresponding to the suction tube (25), and one end of the suction tube (25) close to the cavity plate (26) is located below the knife holder (14) and the slitting knife (15) when they move downward to a final position.

3. The slitting device for producing plastic packaging bags according to claim 2, characterized in that: A through hole is provided at the portion where the collecting box (210) communicates with the discharge pipe (28), and one end of the discharge pipe (28) away from the collecting cylinder (24) is horizontally attached to the outer surface of the collecting box (210) corresponding to the through hole.

4. The slitting device for producing plastic packaging bags according to claim 3, characterized in that: The fixing box (29) and the collecting box (210) are both made of transparent acrylic material.

5. The slitting device for producing plastic packaging bags according to claim 4, characterized in that: The tool holder (14) is symmetrically provided with active smoothing mechanisms on both sides below the hydraulic cylinder (13), and the active smoothing mechanisms include four block rods (31) fixedly connected to the tool holder (14), and the four block rods (31) are symmetrically provided in pairs on the outer walls of both sides of the tool holder (14), and the four block rods (31) are provided with rectangular blocks at one end away from the tool holder (14), and the four block rods (31) are provided with displacement plates (32) on one side away from the tool holder (14), and the displacement plates (32) are provided with inclined grooves (33), and the rectangular blocks in the four block rods (31) are slidably connected in the adjacent inclined grooves (33), and the four A concave plate (34) is fixedly provided on the outer wall of each displacement plate (32) on a side away from the block rod (31); the four concave plates (34) are elastically connected to a smoothing shaft (35); a protrusion (36) is fixedly provided on the bottom of the four displacement plates (32); a horizontal groove frame (37) is fixedly connected to the top surface of the conveying table (12) and at positions corresponding to the four protrusions (36); a horizontal spring (38) is connected inside the horizontal groove frame (37); a sliding plate (39) is fixedly connected to one end of the horizontal spring (38) close to the protrusion (36); and the sliding plate (39) is slidably connected to the inside of the horizontal groove frame (37).

6. The slitting device for producing plastic packaging bags according to claim 5, characterized in that: The rectangular block is in initial position in contact with the groove surface at the top of the inclined groove (33), and two rectangular clamping plates are symmetrically arranged on the outside of the two sides of the rectangular block on the inclined groove (33).

7. The slitting device for producing plastic packaging bags according to claim 6, characterized in that: Side grooves (341) are respectively provided on both sides of the four concave plates (34), and side blocks (342) are respectively provided at positions of the smoothing shaft (35) corresponding to the side grooves (341). The side blocks (342) are slidably connected in the side grooves (341), and a vertical spring (343) is connected between the top surface of the side block (342) and the groove surface at the top of the side groove (341).

8. The slitting device for producing plastic packaging bags according to claim 7, characterized in that: A collecting and processing mechanism is provided on a side of the collecting bin (11) close to the conveying platform (12), the collecting and processing mechanism comprising two limit plates (41) symmetrically fixedly connected to the inner bottom surface of the collecting bin (11), a curved plate (42) is fixedly connected to a side of the tool holder (14) close to the collecting bin (11) and close to the limit plates (41), a rack (43) is fixedly connected to an end of the curved plate (42) away from the tool holder (14), a vertical groove frame (44) is fixedly connected to a side of the top surface of the collecting bin (11) close to the curved plate (42), the ... A second rack (45) is slidably connected inside the frame (44); a mounting plate (46) is fixedly provided on a side of the top surface of the collecting bin (11) close to the first rack (43); a gear (47) is rotatably connected to a side of the mounting plate (46) close to the first rack (43); the first rack (43) and the second rack (45) are respectively meshed with two sides of the gear (47); an end of the second rack (45) away from the vertical groove frame (44) is fixedly connected to a spring telescopic rod (48); and a combined pressure rod (49) is fixedly connected to the bottom of the telescopic end of the spring telescopic rod (48).

9. A slitting method for producing plastic packaging bags, characterized in that: Using the slitting device for producing plastic packaging bags as described in any one of claims 1 to 8, the method comprises the following steps: Step 1: First, a staff member places the rolled plastic packaging bag to be cut on a side of the machine body (1) away from the collecting bin (11), and passes one end of the plastic packaging bag to be cut between the conveyor belt (121) and the conveying roller (122); Step 2: Then, the staff starts the conveyor belt (121) through the controller to transport the plastic packaging bag to be cut, so that the cutting position of the plastic packaging bag to be cut corresponds to the cutting knife (15), and stops the conveyor belt (121); Step 3: Subsequently, the hydraulic cylinder (13) is activated through the controller, and the knife holder (14) and the slitting knife (15) are driven downward by the telescopic end thereof to perform slitting on the plastic packaging bag to be slit; Step 4: After the slitting is completed, the controller controls the telescopic end of the hydraulic cylinder (13) to move upward, driving the slitting knife (15) to move upward synchronously, and then the conveyor belt (121) is started to continue conveying, and the slitting plastic packaging bags are sent to the collection bin (11). According to this step, the rolled plastic packaging bags can be slid and collected one by one; Step 5: Based on the above step 3, as the knife holder (14) moves downward, the belt ring plate (21) is driven to move downward synchronously, and then the screw rod (22) is prompted to rotate continuously, and in coordination with the movement of the combined connecting rod (23), the collecting cylinder (24), and the belt reel rod (27), the dust and debris adhering to and falling on the corresponding cutting position of the conveyor belt (121) are automatically collected in real time through the suction pipe (25), the cavity plate (26), the discharge pipe (28) and the collection box (210); Step 6: Based on the above step 3, as the knife holder (14) moves downward, the block rod (31) is driven to move synchronously, and the displacement plate (32), the inclined groove (33) and the horizontal groove frame (37) are coordinated to cause the four smoothing shafts (35) to press the two sides of the plastic packaging bag cutting part to move away from each other horizontally, thereby ensuring the flatness of the plastic packaging bag cutting part; Step 7: Based on the above steps 3 and 4, the cut plastic packaging bags are sent to the collection bin (11), and as the knife holder (14) moves up and down, the curved plate (42) and the rack 1 (43) are driven to move synchronously, and the rack 1 (43) drives the gear (47) to rotate, and the gear (47) drives the rack 2 (45), the spring telescopic rod (48), and the combined pressure rod (49) to reciprocate up and down, and the combined pressure rod (49) moves downward to press the cut plastic packaging bags; Step 8: Repeat the above steps 1 to 7 to slit the batches of rolled plastic packaging bags.

10. The slitting method for producing plastic packaging bags according to claim 9, characterized in that: In the process of the combined pressure rod (49) pressing the cut plastic packaging bags in step seven, the telescopic end of the spring telescopic rod (48) adaptively retracts, thereby driving the combined pressure rod (49) to move upward, so as to automatically adapt as the collected thickness of the cut plastic packaging bags gradually increases.

Images