Hot cutting and edge melting device for processing degradable plastic packaging bag

Abstract

The invention relates to the technical field of plastic packaging processing, in particular to a hot cutting edge melting device for degradable plastic packaging bag processing, which comprises a material conveying assembly, a cutting assembly, a folding assembly and an edge sealing assembly, the material conveying assembly comprises a material conveying platform, a press roller and a driving mechanism, and the cutting assembly comprises a lifting cutter and a lifting press plate; the folding assembly comprises a bearing platform, a push plate and a translation mechanism, one end of the bearing platform is provided with an arc-shaped surface, a lifting frame is arranged between the bearing platform and the conveying platform, the edge sealing assembly comprises two sets of hot cutting and edge melting mechanisms, and the push plate is provided with a magnetic control clamping mechanism used for pressing a packaging bag on the push plate. The plastic packaging bag is manufactured in the mode that the single-layer plastic film is folded in half, the edges of the openings in the two sides of the single-layer plastic film are sealed after the single-layer plastic film is folded in half, and therefore the number of times of hot melting edge cutting of the plastic film is reduced, and compared with the patent, the number of times of hot melting edge cutting is reduced, and waste of plastic film raw materials can be greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic packaging processing, in particular to a hot-cutting and fusing device for processing degradable plastic packaging bags. Background Art

[0002] Plastic packaging bags are made of plastic as raw materials and are used to produce various daily necessities. They are widely used in daily life and industrial production, but this temporary convenience brings long-term harm. Commonly used plastic packaging bags are mostly made of polyethylene film, which is non-toxic, so it can be used to hold food. There is also a film made of polyvinyl chloride, which is also non-toxic, but the additives added according to the purpose of the film are often harmful to the human body and have certain toxicity. Therefore, this type of film and the plastic bags made of this film are not suitable for holding food.

[0003] The existing Chinese patent with publication number CN109677011B discloses a double-sided hot-melt plastic packaging bag embossing machine, but the patent also has the following defects:

[0004] First, the above patent manufactures a plastic packaging bag by combining and sealing two layers of plastic film. When the double-layer plastic film is sealed at the side, a double-opening plastic sleeve is obtained. After that, the end opening of the plastic sleeve needs to be sealed to finally manufacture a single-opening plastic packaging bag. Therefore, the above patent has a relatively complicated process for edge sealing of the plastic film. The entire plastic film needs to be heat-melted and trimmed three times, which wastes the plastic film raw material.

[0005] Secondly, a sealing edge is left on the open end of a traditional plastic packaging bag, and the single opening of the plastic packaging bag can be sealed by the sealing edge later. However, in the process of making the plastic packaging bag in the above-mentioned patent, the two layers of combined plastic film will be cut at the same time, so that a sealing edge cannot be produced, which will eventually cause defects in the finished product.

[0006] Therefore, it is necessary to provide a hot cutting and fusing device for processing degradable plastic packaging bags to solve the above problems. Summary of the invention

[0007] Based on this, it is necessary to provide a hot cutting and fusing device for processing biodegradable plastic packaging bags in response to the existing technical problems.

[0008] In order to solve the problems of the prior art, the technical scheme adopted by the present invention is: a hot cutting and fusing device for processing degradable plastic packaging bags, comprising a feeding component, a cutting component, a folding component and an edge sealing component, the feeding component and the folding component are spaced apart in the horizontal direction, the cutting component is arranged between the feeding component and the folding component, the edge sealing component is arranged beside the folding component, the feeding component comprises a feeding platform, a pressure roller and a driving mechanism, the pressure roller is arranged above the feeding platform, the driving mechanism is used to drive the pressure roller to rotate, the cutting component comprises a lifting cutter and a lifting pressure plate, the folding component comprises a supporting platform, a push plate and a translation mechanism, one end of the supporting platform is provided with an arc surface, a lifting frame is provided between the supporting platform and the feeding platform, the lifting cutter is located above the lifting frame, the lifting pressure plate is located above the supporting platform, the push plate is horizontal, and the translation mechanism is used to drive the push plate to push the supporting platform, the edge sealing component comprises two groups of hot cutting and fusing mechanisms which are symmetrically arranged on both sides of the supporting platform, and a magnetically controlled clamping mechanism for pressing the packaging bag onto the push plate is provided on the push plate.

[0009] Furthermore, vertical support columns are fixed on both sides of the feeding platform, and a vertical strip slide groove is opened on the upper end of each support column, and a guide block is slidably arranged in each strip slide groove. The pressure roller is horizontally arranged between the two support columns, and the two ends of the pressure roller are rotatably connected to the two guide blocks respectively. A horizontal support plate is arranged above the pressure roller, and the two ends of the horizontal support plate are fixedly connected to the tops of the two support columns respectively. Two symmetrical No. 1 cylinders are fixedly arranged on the top of the horizontal support plate, and each No. 1 cylinder is vertical, and the output end of each No. 1 cylinder is fixedly connected downward to the corresponding guide block.

[0010] Furthermore, the driving mechanism includes a motor, a tensioner and a synchronous transmission member. The motor is horizontally fixed at the lower end of one of the support columns. The synchronous transmission member includes a No. 1 synchronous wheel, a No. 2 synchronous wheel and a synchronous belt. The No. 1 synchronous wheel is coaxially fixed to one end of the pressure roller, and the No. 2 synchronous wheel is coaxially fixed to the output end of the motor. The tensioner is fixed to the support column on which the motor is provided. The synchronous belt is sleeved on the No. 1 synchronous wheel and the No. 2 synchronous wheel, and the tensioner tightens the synchronous belt from the inside to the outside.

[0011] Furthermore, a No. 2 cylinder is provided between the feeding platform and the supporting platform, and the No. 2 cylinder is vertical. The lifting frame includes a base plate, a pressure shaft and two connecting rods. The base plate is horizontally fixed on the output end of the No. 2 cylinder. The two connecting rods are respectively provided at both ends of the base plate, and each connecting rod is vertically connected to the base plate. The pressure shaft is horizontally provided between the two connecting rods, and the two ends of the pressure shaft are respectively fixed to the two connecting rods.

[0012] Furthermore, a gantry is fixedly provided above the supporting platform, a vertical No. 3 cylinder is fixedly provided on the top of the gantry, the lifting cutter is strip-shaped and vertical, a vertical sliding rod is fixedly provided on the top of the lifting cutter, a horizontal cross bar is fixedly provided on the gantry, a fixing sleeve is provided on the cross bar, the sliding rod coaxially passes through the fixing sleeve upward, and the output end of the No. 3 cylinder is coaxially fixedly connected downward with the top of the sliding rod.

[0013] Furthermore, a support rod perpendicular to the cross rod is fixed on the sliding rod, the lifting and lowering pressure plate is horizontal, a vertical limit rod is formed on the top of the lifting and lowering pressure plate, an axially vertical limit sleeve is formed on the end of the support rod, the limit rod passes through the limit sleeve vertically upward, the upper end of the limit rod is threaded, and a limit nut is screwed on the upper end of the limit rod, a vertical No. 1 spring is sleeved on the limit rod, and both ends of the No. 1 spring respectively conflict with the limit sleeve and the lifting and lowering pressure plate.

[0014] Furthermore, a support frame is provided below the supporting platform, and a vertical plate is formed at one end of the supporting platform close to the feeding platform and is fixedly connected to the support frame vertically downward, and a No. 1 baffle is formed at one end of the push plate facing the feeding platform and a No. 1 baffle is formed vertically downward, and support bars are formed horizontally extending from the No. 1 baffle on both sides of the No. 1 baffle, and a No. 2 baffle is formed vertically downward at one end of each support bar, and the translation mechanism includes an electric drive component and a limit component, and the electric drive component includes two groups of No. 1 electric slide rails and a No. 1 slider, the two groups of No. 1 electric slide rails are symmetrically fixed on the supporting frame, the two No. 1 sliders slide on the two groups of No. 1 electric slide rails respectively, and each No. 1 slider is fixedly connected to the bottom of the push plate, and the limit component includes two groups of horizontal rods and sliding sleeves, the two groups of horizontal rods are respectively fixed to the sides of the two groups of No. 1 electric slide rails, the two groups of sliding sleeves are respectively sleeved on the two groups of horizontal rods, and each sliding sleeve is fixedly connected to the bottom of the push plate.

[0015] Furthermore, lateral frames are provided on both sides of the support frame, and each set of hot cutting and melting mechanisms includes a lifting cylinder, a slide, a pressure wheel, an electric hot knife, a No. 2 electric slide rail and a No. 2 slider. The No. 2 electric slide rail is horizontally fixed on the lateral frame, and the No. 2 slider is arranged on the No. 2 electric slide rail. A fixed seat is provided on the No. 2 slider, and a vertical guide groove is provided in the fixed seat. The slide slides in the guide groove, and the pressure wheel rotates on the slide. The electric hot knife is fixed on the slide, and the electric hot knife is located next to the pressure wheel. The lifting cylinder is vertically connected to the fixed seat, and the output end of the lifting cylinder is upwardly connected to the slide.

[0016] Furthermore, the magnetically controlled clamping mechanism includes a fixed frame, a pressure block, a vertical rod, a guide sleeve, a No. 2 spring, an iron block and an electromagnet. The fixed frame is fixedly arranged on the end of the push plate away from the No. 1 baffle, the guide sleeve is connected to the fixed frame, the vertical rod passes through the guide sleeve vertically upward, the pressure block is horizontally fixed to the lower end of the vertical rod, the No. 2 spring sleeve is arranged on the vertical rod, the two ends of the No. 2 spring respectively conflict with the pressure block and the guide sleeve, the fixed frame is provided with a vertical frame, the iron block is fixed to the upper end of the vertical rod, the electromagnet is fixed on the vertical frame, and the electromagnet is located directly above the iron block, and a square notch is provided on the push plate directly below the pressure block.

[0017] Furthermore, a rectangular block and two No. 1 inclined wedge blocks are fixedly provided at the upper end of the vertical pole, the rectangular block is fixed to the top of the vertical pole, the iron block is embedded in the top of the rectangular block, the two No. 1 inclined wedge blocks are symmetrically fixed to the two sides of the rectangular block, a mounting frame is formed on the support frame, two strip contact plates are fixed on the mounting frame, the two strip contact plates respectively correspond to the two No. 1 inclined wedge blocks, and a No. 2 inclined wedge block matching the No. 1 inclined wedge block is formed on one end of each strip contact plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] First, the device uses a single-layer plastic film to fold in half to make a plastic packaging bag. After the single-layer plastic film is folded in half, the openings on both sides thereof are sealed, thereby reducing the number of times the plastic film is hot-melted and trimmed. Compared with the above-mentioned patent, reducing the number of times the hot-melt and trimming times can greatly reduce the waste of plastic film raw materials;

[0020] Secondly, the device can make the sealing edge of the plastic packaging bag by controlling the length of the single-layer plastic film extended from the supporting platform. Taking the single-layer plastic film pressed on the supporting platform as an example, the end of the single-layer plastic film cut by the lifting cutter is the broken end, and the end of the single-layer plastic film folded flat after sagging is the folded end. When the broken end is longer than the folded end, the extra part of the broken end is the sealing edge. When the openings on both sides of the double-layer plastic film are sealed, the single opening of the plastic packaging bag can be covered by the sealing edge later.

[0021] Thirdly, the device clamps the finished plastic packaging bag on the push plate through a magnetically controlled clamping mechanism, so that when the push plate retracts, the push plate will remove the plastic packaging bag mounted on the supporting platform; when the push plate is about to be reset, the magnetically controlled clamping mechanism will automatically loosen the plastic packaging bag, thereby facilitating the unloading of the plastic packaging bag and ultimately improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a top view of the present invention;

[0024] Figure 3yes Figure 2 Section view along line AA;

[0025] Figure 4 yes Figure 3 A1 is a partial enlarged schematic diagram;

[0026] Figure 5 yes Figure 3 A2 is a partial enlarged schematic diagram;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the feeding component. Figure 1 ;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the feeding component. Figure 2 ;

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the lifting frame;

[0030] Fig. 9 It is a three-dimensional structural schematic diagram of the cutting component;

[0031] Fig.10 yes Fig. 9 A3 is a partial enlarged schematic diagram;

[0032] Fig.11 It is a three-dimensional structural schematic diagram of the folding component and the edge sealing component;

[0033] Fig.12 yes Fig.11 A4 is a partial enlarged schematic diagram;

[0034] Fig.13 yes Fig.11 A partial enlarged schematic diagram indicated by A5;

[0035] Fig.14 yes Fig.11 A partial enlarged schematic diagram indicated by A6;

[0036] Fig.15 It is a schematic diagram of the three-dimensional structure of the push plate;

[0037] Fig.16 This is a schematic diagram of the three-dimensional structure of the supporting platform. Figure 1 ;

[0038] Fig.17 This is a schematic diagram of the three-dimensional structure of the supporting platform. Figure 2 ;

[0039] Fig.18 It is a schematic diagram of the three-dimensional structure of the push plate;

[0040] Fig.19It is a schematic diagram of the three-dimensional structure of a single-layer plastic film before it is folded in half;

[0041] Fig. 20 It is a schematic diagram of the three-dimensional structure when a single-layer plastic film is folded in half;

[0042] Fig.21 It is a schematic diagram of the three-dimensional structure after a single layer of plastic film is folded in half.

[0043] The numbers in the figure are: 1. Feeding assembly; 2. Cutting assembly; 3. Folding assembly; 4. Edge banding assembly; 5. Feeding platform; 6. Pressing roller; 7. Lifting cutter; 8. Lifting pressure plate; 9. Supporting platform; 10. Push plate; 11. Arc surface; 12. Support column; 13. Strip slide; 14. Guide block; 15. No. 1 cylinder; 16. Motor; 17. Tensioner; 18. No. 1 synchronous wheel; 19. No. 2 synchronous wheel; 20. Synchronous belt; 21. No. 2 cylinder; 22. Bottom plate; 23. Pressing shaft; 24. Connecting rod; 25. Gantry; 26. No. 3 cylinder; 27. Sliding rod; 28. Cross bar; 29. ​​Fixed sleeve; 30. Support rod; 31. Limit rod; 32. Limit sleeve; 33. Limit nut; 34. No. 1 Spring; 35, support frame; 36, vertical plate; 37, No. 1 stop bar; 38, support bar; 39, No. 2 stop bar; 40, No. 1 electric slide rail; 41, No. 1 slider; 42, horizontal rod; 43, sliding sleeve; 44, lateral frame; 45, lifting cylinder; 46, slide frame; 47, pressure wheel; 48, electric hot knife; 49, No. 2 electric slide rail; 50, No. 2 slider; 51, fixed seat; 52, guide slide groove; 53, fixed frame; 54, pressure block; 55, vertical rod; 56, guide sleeve; 57, No. 2 spring; 58, iron block; 59, electromagnet; 60, vertical frame; 61, square notch; 62, rectangular block; 63, No. 1 oblique wedge block; 64, mounting frame; 65, strip contact plate; 66, No. 2 oblique wedge block; 67, sealing edge. DETAILED DESCRIPTION

[0044] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] refer to Figures 1 to 21The hot cutting and fusing device for processing a degradable plastic packaging bag shown in the figure comprises a feeding component 1, a cutting component 2, a folding component 3 and an edge sealing component 4. The feeding component 1 and the folding component 3 are spaced apart in the horizontal direction. The cutting component 2 is arranged between the feeding component 1 and the folding component 3. The edge sealing component 4 is arranged beside the folding component 3. The feeding component 1 comprises a feeding platform 5, a pressure roller 6 and a driving mechanism. The pressure roller 6 is arranged above the feeding platform 5. The driving mechanism is used to drive the pressure roller 6 to rotate. The cutting component 2 comprises a lifting cutter 7 and a lifting pressure plate 8. The folding component 3 comprises a supporting platform 9, a push plate 10 and a translation mechanism. One end of the supporting platform 9 is provided with an arc surface 11 (such as Fig.17 As shown), a lifting frame is provided between the supporting platform 9 and the feeding platform 5, the lifting cutter 7 is located above the lifting frame, the lifting pressure plate 8 is located above the supporting platform 9, the push plate 10 is horizontal, and the translation mechanism is used to drive the push plate 10 to push the supporting platform 9, the edge sealing assembly 4 includes two groups of hot cutting and melting mechanisms which are symmetrically arranged on both sides of the supporting platform 9, and the push plate 10 is provided with a magnetically controlled clamping mechanism for pressing the packaging bag onto the push plate 10.

[0046] The plastic packaging bag of the device is made of hard plastic film. The specific preparation process of the plastic packaging bag is as follows: a single-layer plastic film is spread flat on the feeding platform 5, and then the single-layer plastic film is pressed downward on the feeding platform 5 by the pressing roller 6. When the single-layer plastic film is pressed on the feeding platform 5, the driving mechanism drives the pressing roller 6 to rotate, so as to transport the single-layer plastic film forward by the pressing roller 6. The single-layer plastic film will be flattened when passing through the pressing roller 6, and then the single-layer plastic film will pass through the lifting frame and drive to the supporting platform 9. When one end of the single-layer plastic film passes the supporting platform 9 for a distance, the pressing roller 6 stops rotating. , the lifting and pressing plate 8 descends to press the single-layer plastic film onto the supporting platform 9. When the single-layer plastic film is pressed onto the supporting platform 9, the lifting and cutting knife 7 descends to cut the single-layer plastic film. At this time, the single-layer plastic film pressed on the supporting platform 9 is the smallest unit for preparing plastic packaging bags. Since one end of the single-layer plastic film pressed on the supporting platform 9 is extended outside the supporting platform 9, the end of the single-layer plastic film extended outside the supporting platform 9 will sag due to its own weight. When one end of the single-layer plastic film sags, the translation mechanism will drive the push plate 10 to push it toward the supporting platform 9. In this process, the push plate 10 will lift The drooping end of the single-layer plastic film, and as the push plate 10 is pushed forward, the single-layer plastic film begins to fold in half along the curved surface 11 of the supporting platform 9, and the drooping end of the single-layer plastic film will be gradually pushed to the horizontal by the push plate 10, and finally the drooping end of the single-layer plastic film will be clamped between the push plate 10 and the supporting platform 9. When the single-layer plastic film is completely folded in half, the push plate 10 stops moving, and the entire single-layer plastic film becomes a double-layer plastic film. Subsequently, the two sets of hot-cutting and fusing mechanisms work synchronously, and the openings on both sides of the double-layer plastic film are sealed by the two sets of hot-cutting and fusing mechanisms, and finally a single-opening plastic packaging bag is prepared. The obtained plastic packaging bag is sleeved on the supporting platform 9, and then the magnetically controlled clamping mechanism will press the plastic packaging bag onto the push plate 10, and at the same time, the lifting and pressing plate 8 will rise. Then, when the push plate 10 retreats, the plastic packaging bag will be pulled out of the supporting platform 9 by the push plate 10. When the push plate 10 retreats to its reset state, the magnetically controlled clamping mechanism will release the plastic packaging bag, and finally the plastic packaging bag placed on the supporting platform 9 can be taken out by a manipulator (not shown in the figure). Among them, the device can make the sealing edge 67 (such as ) of the plastic packaging bag by controlling the length of the single-layer plastic film extended from the supporting platform 9. Fig.21 As shown in FIG. 1 , taking the single-layer plastic film pressed on the supporting platform 9 as an example, the end of the single-layer plastic film cut by the lifting cutter 7 is the broken end, and the end of the single-layer plastic film folded flat after sagging is the folded end. Fig.21 As shown, when the broken end is longer than the folded end, the extra portion of the broken end is the sealing edge 67. After the openings on both sides of the double-layer plastic film are sealed, the sealing edge 67 can subsequently cover the single opening of the plastic packaging bag.

[0047] In order to show how the pressure roller 6 presses the single-layer plastic film onto the feeding platform 5, the following features are set:

[0048] Both sides of the feeding platform 5 are fixed with vertical support columns 12 (such as Figure 7 As shown in the figure, a vertical strip slide groove 13 is provided at the upper end of each support column 12, and a guide block 14 is slidably provided in each strip slide groove 13. The pressure roller 6 is horizontally arranged between the two support columns 12, and the two ends of the pressure roller 6 are rotatably connected to the two guide blocks 14 respectively. A horizontal support plate is arranged above the pressure roller 6, and the two ends of the horizontal support plate are respectively fixedly connected to the tops of the two support columns 12, and two symmetrical No. 1 cylinders 15 are fixedly arranged on the top of the horizontal support plate, and each No. 1 cylinder 15 is vertical, and the output end of each No. 1 cylinder 15 is fixedly connected downward to the corresponding guide block 14.

[0049] The two No. 1 cylinders 15 work synchronously, and the No. 1 cylinder 15 drives the guide block 14 to slide in the strip slide groove 13, thereby driving the pressure roller 6 to rise and fall. When a single-layer plastic film is laid on the feeding platform 5, the pressure roller 6 rises. When one end of the single-layer plastic film passes between the pressure roller 6 and the feeding platform 5 from below, the pressure roller 6 descends, and finally the single-layer plastic film is pressed onto the feeding platform 5 by the pressure roller 6.

[0050] In order to show the specific structure of the drive mechanism, the following features are set:

[0051] The driving mechanism includes a motor 16, a tensioner 17 and a synchronous transmission member. The motor 16 is horizontally fixed to the lower end of one of the support columns 12. The synchronous transmission member includes a No. 1 synchronous wheel 18, a No. 2 synchronous wheel 19 and a synchronous belt 20. The No. 1 synchronous wheel 18 is coaxially fixed to one end of the pressure roller 6, and the No. 2 synchronous wheel 19 is coaxially fixed to the output end of the motor 16. The tensioner 17 is fixed to the support column 12 provided with the motor 16. The synchronous belt 20 is sleeved on the No. 1 synchronous wheel 18 and the No. 2 synchronous wheel 19, and the tensioner 17 tightens the synchronous belt 20 from the inside to the outside.

[0052] When the motor 16 is started, the motor 16 will drive the second synchronous wheel 19 to rotate, and then through the transmission action of the synchronous belt 20, the first synchronous wheel 18 will drive the pressure roller 6 to rotate, and finally the pressure roller 6 will drive the single-layer plastic film to translate toward the supporting platform 9.

[0053] In order to show the specific structure of the lifting frame, the following features are set:

[0054] A No. 2 cylinder 21 is provided between the feeding platform 5 and the supporting platform 9. The No. 2 cylinder 21 is vertical. The lifting frame includes a base plate 22, a pressure shaft 23 and two connecting rods 24. The base plate 22 is horizontally fixed on the output end of the No. 2 cylinder 21. The two connecting rods 24 are respectively provided at both ends of the base plate 22. Each connecting rod 24 is vertically fixed to the base plate 22. The pressure shaft 23 is horizontally provided between the two connecting rods 24, and the two ends of the pressure shaft 23 are respectively fixed to the two connecting rods 24.

[0055] When the feeding platform 5 and the supporting platform 9 are installed, the top of the feeding platform 5 is flush with the top of the supporting platform 9. When the single-layer plastic film needs to be transported to the supporting platform 9, the No. 2 cylinder 21 will drive the bottom plate 22 to rise. When the bottom plate 22 rises to the point where its top is flush with the top of the supporting platform 9, the No. 2 cylinder 21 stops. At this time, the pressure shaft 23 is located above the single-layer plastic film, so that the single-layer plastic film that drives out of the feeding platform 5 will be transported to the supporting platform 9 through the connection of the bottom plate 22. When the lifting cutter 7 descends to cut the single-layer plastic film, the broken end of the single-layer plastic film pressed on the feeding platform 5 will be extended outside the feeding platform 5. Thereafter, the No. 2 cylinder 21 drives the bottom plate 22 to descend, so that the pressure shaft 23 will press down the broken end of the single-layer plastic film extended on the feeding platform 5 through the bottom plate 22, thereby preventing the broken end of the single-layer plastic film extended on the feeding platform 5 from hindering the hot cutting and melting mechanism from sealing the openings on both sides of the double-layer plastic film.

[0056] In order to show how the lifting cutter 7 is lifted and lowered, the following features are set:

[0057] A gantry 25 is fixedly provided above the supporting platform 9, and a vertical No. 3 cylinder 26 (such as Fig. 9 As shown in the figure, the lifting cutter 7 is strip-shaped and vertical, a vertical sliding rod 27 is fixed on the top of the lifting cutter 7, a horizontal cross bar 28 is fixed on the gantry 25, a fixing sleeve 29 is provided on the cross bar 28, the sliding rod 27 passes through the fixing sleeve 29 coaxially upward, and the output end of the No. 3 cylinder 26 is coaxially fixedly connected to the top of the sliding rod 27 downward.

[0058] The No. 3 cylinder 26 is used to drive the sliding rod 27 to move up and down, thereby driving the lifting cutter 7 to move up and down through the sliding rod 27. Among them, the fixed sleeve 29 mounted on the sliding rod 27 is used to limit the sliding direction of the sliding rod 27, ultimately ensuring that the sliding rod 27 can only slide in the vertical direction.

[0059] In order to show how the lifting plate 8 is lifted and lowered, the following features are set:

[0060] A support rod 30 perpendicular to the cross rod 28 is fixed on the sliding rod 27, the lifting and lowering pressure plate 8 is horizontal, and a vertical limit rod 31 is formed on the top of the lifting and lowering pressure plate 8. An axially vertical limit sleeve 32 is formed on the end of the support rod 30. The limit rod 31 passes through the limit sleeve 32 vertically upward. The upper end of the limit rod 31 is threaded, and a limit nut 33 is screwed on the upper end of the limit rod 31. A vertical No. 1 spring 34 is sleeved on the limit rod 31, and the two ends of the No. 1 spring 34 respectively conflict with the limit sleeve 32 and the lifting and lowering pressure plate 8.

[0061] In the initial state, the No. 3 cylinder 26 drives the lifting cutter 7 to rise through the sliding rod 27. At the same time, the sliding rod 27 drives the lifting plate 8 to rise through the support rod 30. When the lifting cutter 7 stops rising, the lifting plate 8 is lifted. Figure 3 and Figure 4 As shown, the lifting plate 8 is closer to the supporting platform 9 than the lifting cutter 7. Therefore, when the sliding rod 27 is descending, the lifting plate 8 will contact the single-layer plastic film before the lifting cutter 7. Finally, the lifting plate 8 will first press the single-layer plastic film, and then the lifting cutter 7 will cut the taut single-layer plastic film. When the lifting plate 8 is pressed on the single-layer plastic film, as the sliding rod 27 gradually descends, the No. 1 spring 34 will be gradually compressed, so that the No. 1 spring 34 generates elastic force. When the single-layer plastic film is cut, the No. 3 cylinder 26 will bring The movable sliding rod 27 rises a short distance. During this process, the lifting cutter 7 will move upward away from the single-layer plastic film, so as not to hinder the subsequent edge sealing work of the single-layer plastic film, and the lifting and pressing plate 8 will continue to press the single-layer plastic film onto the supporting platform 9 due to the elastic force of the No. 1 spring 34. Among them, when the lifting and pressing plate 8 is pressed on the single-layer plastic film, the lifting and pressing plate 8 is located in the middle position of the single-layer plastic film, and the length of the lifting and pressing plate 8 is much smaller than the width of the single-layer plastic film, so that the lifting and pressing plate 8 will not hinder the subsequent edge sealing work of the single-layer plastic film.

[0062] In order to show the specific structure of the push plate 10 and the translation mechanism, the following features are set:

[0063] A support frame 35 is provided below the support platform 9, and a vertical plate 36 (combined with a vertical plate 36) is formed on one end of the support platform 9 close to the feeding platform 5 and connected to the support frame 35 vertically downward. Figure 2 and Fig.15 ), the end of the push plate 10 facing the feeding platform 5 is formed with a first baffle 37 vertically downward, and both sides of the first baffle 37 are formed with support bars 38 horizontally extending outside the first baffle 37 (combined with Fig.15 and Fig.18 ), one end of each support bar 38 is formed with a second stop bar 39 extending vertically downward, the translation mechanism includes an electric drive component and a limit component, the electric drive component includes two sets of first electric slide rails 40 and a first slider 41, and the two sets of first electric slide rails 40 are symmetrically fixed on the support frame 35 (such as Fig.11 As shown), two No. 1 sliders 41 slide on two sets of No. 1 electric slide rails 40 respectively, and each No. 1 slider 41 is fixedly connected to the bottom of the push plate 10, and the limiter includes two sets of horizontal rods 42 and a sliding sleeve 43 (as shown Fig.15 As shown in the figure, two groups of horizontal rods 42 are respectively fixed to the sides of two groups of No. 1 electric slide rails 40, and two groups of sliding sleeves 43 are respectively sleeved on the two groups of horizontal rods 42, and each sliding sleeve 43 is fixedly connected to the bottom of the push plate 10.

[0064] The push plate 10 is driven to translate by the electric drive component. During this process, the No. 1 slider 41 will translate on the corresponding No. 1 electric slide rail 40, and the sliding sleeve 43 will slide on the corresponding horizontal rod 42. The translation of the push plate 10 is stabilized by the cooperation between the horizontal rod 42 and the sliding sleeve 43. When the push plate 10 translates toward the supporting platform 9, the two support bars 38 on the push plate 10 will first contact the single-layer plastic film, so that the drooping end of the single-layer plastic film will be pushed from the drooping state to the horizontal state by the two support bars 38. When the push plate 10 approaches the vertical plate 36, the two support bars 38 on the push plate 10 will respectively move from the vertical plate 36 to the horizontal state. Passing through both sides, when the push plate 10 stops translating, the drooping end of the single-layer plastic film will be horizontally pressed between the push plate 10 and the supporting platform 9. Since the plastic packaging bag needs to be made into a sealing edge 67, when the single-layer plastic film is folded along the supporting platform 9, the end of the single-layer plastic film located at the top of the supporting platform 9 will be longer than the end of the single-layer plastic film located at the bottom of the supporting platform 9. At this time, the support bar 38 is used to support the end of the single-layer plastic film located at the top of the supporting platform 9, ultimately ensuring that the side opening of the double-layer plastic film laid on the supporting platform 9 can be completely sealed by the corresponding hot cutting and melting mechanism.

[0065] In order to show the specific structure of each set of hot-cut fusing mechanism, the following features are set:

[0066] Both sides of the support frame 35 are provided with lateral frames 44. Each set of hot cutting and fusing mechanisms includes a lifting cylinder 45, a slide 46, a pressure wheel 47, an electric hot knife 48, a second electric slide rail 49 and a second slider 50. The second electric slide rail 49 is horizontally fixed on the lateral frame 44 (such as Fig.12 As shown), the second slider 50 is arranged on the second electric slide rail 49, the second slider 50 is provided with a fixed seat 51, the fixed seat 51 is provided with a vertical guide groove 52, the slide 46 slides in the guide groove 52, the pressure wheel 47 rotates on the slide 46, the electric hot knife 48 is fixed on the slide 46, and the electric hot knife 48 is located next to the pressure wheel 47, the lifting cylinder 45 is vertically connected to the fixed seat 51, and the output end of the lifting cylinder 45 is upwardly connected to the slide 46.

[0067] When the single-layer plastic film is folded in half on the supporting platform 9, the entire single-layer plastic film will be folded into two layers, and when the double-layer plastic film needs to be edge-sealed, the second electric slide rail 49 controls the second slider 50 to drive the pressure wheel 47 and the electric hot knife 48 to move toward the supporting platform 9. When the pressure wheel 47 moves to the top of the side of the double-layer plastic film, the lifting cylinder 45 drives the slide 46 to descend. During this process, the pressure wheel 47 will press on the side of the double-layer plastic film. Then, as the pressure wheel 47 moves forward, the electric hot knife 48 located next to the pressure wheel 47 will cut the side of the double-layer plastic film. Hot cutting and edge melting are performed. When the electric hot knife 48 passes over the side of the double-layer plastic film, the side opening of the double-layer plastic film has been completely sealed. The pressure wheel 47 is used to press the side of the double-layer plastic film up and down to facilitate the cutting by the electric hot knife 48. After the electric hot knife 48 cuts the double-layer plastic film, the resulting scraps will remain on the push plate 10. In actual use, a blow pipe (not shown in the figure) can be set above each pressure wheel 47, and finally the scraps remaining on the push plate 10 are blown out from the supporting platform 9 through the blow pipe.

[0068] In order to show the specific structure of the magnetically controlled clamping mechanism, the following features are set:

[0069] The magnetically controlled clamping mechanism includes a fixing frame 53, a pressing block 54, a vertical rod 55, a guide sleeve 56, a second spring 57, an iron block 58 and an electromagnet 59. The fixing frame 53 is fixedly arranged on the end of the push plate 10 away from the first baffle 37, and the guide sleeve 56 is connected to the fixing frame 53 (such as Fig.13 As shown), the vertical rod 55 passes through the guide sleeve 56 vertically upward, the pressure block 54 is horizontally fixed to the lower end of the vertical rod 55, the second spring 57 is sleeved on the vertical rod 55, and the two ends of the second spring 57 are respectively in conflict with the pressure block 54 and the guide sleeve 56. The fixing frame 53 is provided with a vertical frame 60, and the iron block 58 is fixed to the upper end of the vertical rod 55 (as shown in FIG. Figure 5 As shown in FIG. 1 , the electromagnet 59 is fixed on the stand 60 , and the electromagnet 59 is located just above the iron block 58 , and a square notch 61 is provided on the push plate 10 and is located just below the pressing block 54 .

[0070] In the initial state, the vertical rod 55 is pushed upward. At this time, the vertical rod 55 will drive the pressure block 54 to rise, and the pressure block 54 will move upward away from the push plate 10, and the pressure block 54 will compress the No. 2 spring 57 when rising, so that the No. 2 spring 57 generates elastic force. When the vertical rod 55 rises to the point where the iron block 58 contacts the electromagnet 59, the electromagnet 59 is energized, so that the iron block 58 will be adsorbed on the electromagnet 59, and finally the pressure block 54 will remain in the rising state. When the double-layer plastic film is edge-sealed, the electromagnet 59 is powered off. At this time, the iron block 58 loses its magnetic attraction, and the No. 2 spring 57 will release its elastic force to drive the pressure block 54 to press down. Finally, the pressure block 54 will press the double-layer plastic film downward onto the push plate 10 through the square notch 61. Thereafter, when the push plate 10 retreats, the pressure block 54 will take the plastic packaging bag out of the supporting platform 9.

[0071] In order to facilitate the removal of the plastic packaging bag from the push plate 10, the following features are provided:

[0072] A rectangular block 62 and two No. 1 oblique wedge blocks 63 are fixed to the upper end of the vertical rod 55. The rectangular block 62 is fixed to the top of the vertical rod 55. The iron block 58 is embedded in the top of the rectangular block 62. The two No. 1 oblique wedge blocks 63 are symmetrically fixed to the two sides of the rectangular block 62. The support frame 35 is formed with a mounting frame 64 (such as Fig.11 As shown), two strip-shaped abutment plates 65 are fixedly provided on the mounting frame 64, and the two strip-shaped abutment plates 65 correspond to the two No. 1 inclined wedge blocks 63 respectively, and a No. 2 inclined wedge block 66 cooperating with the No. 1 inclined wedge block 63 is formed on one end of each strip-shaped abutment plate 65.

[0073] During the retreat of the push plate 10, the two No. 1 inclined wedge blocks 63 will approach the two No. 2 inclined wedge blocks 66 respectively. When the No. 1 inclined wedge block 63 is resisted by the No. 2 inclined wedge block 66, the two No. 1 inclined wedge blocks 63 will drive the vertical rod 55 to rise. During this process, the pressing block 54 gradually moves away from the push plate 10 upward. When the vertical rod 55 rises to the iron block 58 and contacts the electromagnet 59 again, the electromagnet 59 is energized. At this time, the pressing block 54 will remain in the rising state again through the magnetic attraction. When the pressing block 54 is separated from the push plate 10, the plastic packaging bag on the push plate 10 can be taken out.

[0074] Working principle:

[0075] The plastic packaging bag of the device is made of hard plastic film. The specific preparation process of the plastic packaging bag is as follows: a single-layer plastic film is spread flat on the feeding platform 5, and then the single-layer plastic film is pressed downward on the feeding platform 5 by the pressing roller 6. When the single-layer plastic film is pressed on the feeding platform 5, the driving mechanism drives the pressing roller 6 to rotate, so as to transport the single-layer plastic film forward through the pressing roller 6. The single-layer plastic film will be flattened when passing through the pressing roller 6, and then the single-layer plastic film will pass through the lifting frame and drive to the supporting platform 9. When one end of the single-layer plastic film passes the supporting platform 9 for a distance, the pressing roller 6 stops rotating, and the lifting and lowering pressure plate 8 descends to move the single-layer plastic film The lifting cutter 7 is pressed tightly on the supporting platform 9. When the single-layer plastic film is pressed tightly on the supporting platform 9, the lifting cutter 7 descends to cut the single-layer plastic film. At this time, the single-layer plastic film pressed on the supporting platform 9 is the smallest unit for preparing plastic packaging bags. Since one end of the single-layer plastic film pressed on the supporting platform 9 is extended outside the supporting platform 9, the end of the single-layer plastic film extended outside the supporting platform 9 will sag due to its own weight. When one end of the single-layer plastic film sags, the translation mechanism will drive the push plate 10 to push toward the supporting platform 9. In this process, the push plate 10 will hold up the drooping end of the single-layer plastic film, and as the push plate 10 is pushed forward, the single-layer plastic film moves along the The arc surface 11 of the supporting platform 9 begins to fold in half, and the drooping end of the single-layer plastic film will gradually be pushed to the horizontal by the push plate 10, and finally the drooping end of the single-layer plastic film will be clamped between the push plate 10 and the supporting platform 9. When the single-layer plastic film is completely folded in half, the push plate 10 stops moving, and the entire single-layer plastic film becomes a double-layer plastic film. Then, the two sets of hot-cutting and fusing mechanisms work synchronously to seal the openings on both sides of the double-layer plastic film, and finally a single-opening plastic packaging bag is prepared, and the obtained plastic packaging bag is sleeved on the supporting platform 9. Thereafter, the magnetically controlled clamping mechanism presses the plastic packaging bag onto the push plate 10, and at the same time The lifting plate 8 rises, and when the push plate 10 retreats, the plastic packaging bag will be pulled out from the supporting platform 9 by the push plate 10. When the push plate 10 retreats to its reset state, the magnetically controlled clamping mechanism will release the plastic packaging bag, and finally the plastic packaging bag placed on the supporting platform 9 can be taken out by a manipulator (not shown in the figure). Among them, the device can make the sealing edge 67 of the plastic packaging bag by controlling the length of the single-layer plastic film extended from the supporting platform 9. Taking the single-layer plastic film pressed on the supporting platform 9 as an example, the end of the single-layer plastic film cut off by the lifting cutter 7 is the broken end, and the end of the single-layer plastic film folded flat after sagging is the folded end. Fig.21 As shown, when the broken end is longer than the folded end, the extra portion of the broken end is the sealing edge 67. After the openings on both sides of the double-layer plastic film are sealed, the sealing edge 67 can subsequently cover the single opening of the plastic packaging bag.

[0076] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A hot cutting and fusing device for processing biodegradable plastic packaging bags, characterized in that: The invention comprises a feeding component (1), a cutting component (2), a folding component (3) and an edge sealing component (4); the feeding component (1) and the folding component (3) are arranged at intervals in the horizontal direction; the cutting component (2) is arranged between the feeding component (1) and the folding component (3); the edge sealing component (4) is arranged beside the folding component (3); the feeding component (1) comprises a feeding platform (5), a pressure roller (6) and a driving mechanism; the pressure roller (6) is arranged above the feeding platform (5); the driving mechanism is used to drive the pressure roller (6) to rotate; the cutting component (2) comprises a lifting cutter (7) and a lifting pressure plate (8); the folding component (3) comprises A supporting platform (9), a push plate (10) and a translation mechanism, one end of the supporting platform (9) is provided with an arc surface (11), a lifting frame is provided between the supporting platform (9) and the feeding platform (5), the lifting cutter (7) is located above the lifting frame, the lifting plate (8) is located above the supporting platform (9), the push plate (10) is horizontal, the translation mechanism is used to drive the push plate (10) to push toward the supporting platform (9), the edge sealing component (4) includes two groups of hot cutting and melting mechanisms which are symmetrically arranged on both sides of the supporting platform (9), and the push plate (10) is provided with a magnetically controlled clamping mechanism for pressing the packaging bag onto the push plate (10).

2. The hot edge cutting and fusing device for processing biodegradable plastic packaging bags according to claim 1, characterized in that: Vertical support columns (12) are fixedly provided on both sides of the feeding platform (5), and a vertical strip-shaped slide groove (13) is provided at the upper end of each support column (12), and a guide block (14) is slidably provided in each strip-shaped slide groove (13). The pressure roller (6) is horizontally arranged between the two support columns (12), and the two ends of the pressure roller (6) are respectively rotatably connected to the two guide blocks (14). A horizontal support plate is provided above the pressure roller (6), and the two ends of the horizontal support plate are respectively fixedly connected to the tops of the two support columns (12). Two symmetrical No. 1 cylinders (15) are fixedly provided on the top of the horizontal support plate, and each No. 1 cylinder (15) is vertical, and the output end of each No. 1 cylinder (15) is downwardly fixedly connected to the corresponding guide block (14).

3. The hot edge cutting and fusing device for processing biodegradable plastic packaging bags according to claim 2, characterized in that: The driving mechanism comprises a motor (16), a tensioner (17) and a synchronous transmission member, wherein the motor (16) is horizontally fixed to the lower end of one of the support columns (12), and the synchronous transmission member comprises a first synchronous wheel (18), a second synchronous wheel (19) and a synchronous belt (20), wherein the first synchronous wheel (18) is coaxially fixedly connected to one end of the pressure roller (6), and the second synchronous wheel (19) is coaxially fixedly connected to the output end of the motor (16), the tensioner (17) is fixed to the support column (12) provided with the motor (16), and the synchronous belt (20) is sleeved on the first synchronous wheel (18) and the second synchronous wheel (19), and the tensioner (17) tightens the synchronous belt (20) from the inside to the outside.

4. The device for hot-cutting and fusing edges for processing biodegradable plastic packaging bags according to claim 1, characterized in that: A No. 2 cylinder (21) is arranged between the feeding platform (5) and the supporting platform (9), and the No. 2 cylinder (21) is vertical. The lifting frame comprises a bottom plate (22), a pressing shaft (23) and two connecting rods (24). The bottom plate (22) is horizontally fixed on the output end of the No. 2 cylinder (21), and the two connecting rods (24) are respectively arranged at two ends of the bottom plate (22), and each connecting rod (24) is vertically fixedly connected to the bottom plate (22). The pressing shaft (23) is horizontally arranged between the two connecting rods (24), and the two ends of the pressing shaft (23) are respectively fixedly connected to the two connecting rods (24).

5. The hot edge cutting and fusing device for processing biodegradable plastic packaging bags according to claim 1, characterized in that: A gantry (25) is fixedly provided above the supporting platform (9), a vertical No. 3 air cylinder (26) is fixedly provided on the top of the gantry (25), the lifting cutter (7) is strip-shaped and vertical, a vertical sliding rod (27) is fixedly provided on the top of the lifting cutter (7), a horizontal cross bar (28) is fixedly provided on the gantry (25), a fixing sleeve (29) is provided on the cross bar (28), the sliding rod (27) passes through the fixing sleeve (29) coaxially upward, and the output end of the No. 3 air cylinder (26) is coaxially fixedly connected to the top of the sliding rod (27) downward.

6. The device for hot edge cutting and fusing for processing biodegradable plastic packaging bags according to claim 5, characterized in that: A support rod (30) perpendicular to the cross rod (28) is fixedly provided on the sliding rod (27); the lifting and lowering pressure plate (8) is horizontal; a vertical limiting rod (31) is formed on the top of the lifting and lowering pressure plate (8); an axially vertical limiting sleeve (32) is formed on the end of the support rod (30); the limiting rod (31) vertically passes through the limiting sleeve (32); the upper end of the limiting rod (31) is threaded, and a limiting nut (33) is screwed on the upper end of the limiting rod (31); a vertical No. 1 spring (34) is sleeved on the limiting rod (31); two ends of the No. 1 spring (34) respectively contact the limiting sleeve (32) and the lifting and lowering pressure plate (8).

7. The device for hot-cutting and fusing edges for processing biodegradable plastic packaging bags according to claim 1, characterized in that: A support frame (35) is provided below the supporting platform (9), and a vertical plate (36) is formed at one end of the supporting platform (9) close to the feeding platform (5) and is fixedly connected to the support frame (35) vertically downward. A first baffle (37) is formed vertically downward at one end of the push plate (10) facing the feeding platform (5), and both sides of the first baffle (37) are formed with support bars (38) horizontally extending outside the first baffle (37), and one end of each support bar (38) is formed with a second baffle (39) vertically downward. The translation mechanism includes an electric drive component and a limit component, and the electric drive component includes two groups of first electric slide rails. The two groups of No. 1 electric slide rails (40) and a No. 1 slider (41), the two groups of No. 1 electric slide rails (40) are symmetrically fixed on the support frame (35), the two No. 1 sliders (41) slide on the two groups of No. 1 electric slide rails (40) respectively, and each No. 1 slider (41) is fixedly connected to the bottom of the push plate (10), the limiting member includes two groups of horizontal rods (42) and a sliding sleeve (43), the two groups of horizontal rods (42) are respectively fixed to the sides of the two groups of No. 1 electric slide rails (40), the two groups of sliding sleeves (43) are respectively sleeved on the two groups of horizontal rods (42), and each sliding sleeve (43) is fixedly connected to the bottom of the push plate (10).

8. The device for hot-cutting and fusing edges for processing biodegradable plastic packaging bags according to claim 7, characterized in that: Both sides of the support frame (35) are provided with lateral frames (44), and each set of hot cutting and fusing mechanisms comprises a lifting cylinder (45), a slide frame (46), a pressure wheel (47), an electric hot knife (48), a No. 2 electric slide rail (49) and a No. 2 slider (50), wherein the No. 2 electric slide rail (49) is horizontally fixed on the lateral frame (44), the No. 2 slider (50) is arranged on the No. 2 electric slide rail (49), and a fixing seat (51) is arranged on the No. 2 slider (50). A vertical guide slot (52) is provided in the fixed seat (51), the slide (46) slides in the guide slot (52), the pressure wheel (47) rotates on the slide (46), the electric heating knife (48) is fixed on the slide (46), and the electric heating knife (48) is located beside the pressure wheel (47), the lifting cylinder (45) is vertically connected to the fixed seat (51), and the output end of the lifting cylinder (45) is upwardly connected to the slide (46).

9. The device for hot-cutting and fusing edges for processing biodegradable plastic packaging bags according to claim 7, characterized in that: The magnetically controlled clamping mechanism comprises a fixing frame (53), a pressing block (54), a vertical rod (55), a guide sleeve (56), a second spring (57), an iron block (58) and an electromagnet (59). The fixing frame (53) is fixedly arranged on one end of the push plate (10) away from the first baffle bar (37). The guide sleeve (56) is connected to the fixing frame (53). The vertical rod (55) passes through the guide sleeve (56) vertically upward. The pressing block (54) is horizontally fixed to the lower end of the vertical rod (55). A second spring (57) is sleeved on the standing rod (55), and two ends of the second spring (57) are respectively in contact with the pressing block (54) and the guide sleeve (56). A standing frame (60) is provided on the fixed frame (53), an iron block (58) is fixed to the upper end of the standing rod (55), an electromagnet (59) is fixed to the standing frame (60), and the electromagnet (59) is located directly above the iron block (58), and a square notch (61) is provided on the push plate (10) and is located directly below the pressing block (54).

10. The hot edge cutting and fusing device for processing biodegradable plastic packaging bags according to claim 9, characterized in that: A rectangular block (62) and two No. 1 oblique wedge blocks (63) are fixedly provided at the upper end of the vertical rod (55), the rectangular block (62) is fixed to the top of the vertical rod (55), the iron block (58) is embedded in the top of the rectangular block (62), the two No. 1 oblique wedge blocks (63) are symmetrically fixed to the two sides of the rectangular block (62), a mounting frame (64) is formed on the support frame (35), two strip-shaped contact plates (65) are fixedly provided on the mounting frame (64), the two strip-shaped contact plates (65) respectively correspond to the two No. 1 oblique wedge blocks (63), and a No. 2 oblique wedge block (66) matched with the No. 1 oblique wedge block (63) is formed on one end of each strip-shaped contact plate (65).

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