CN209955343U - Hot cutting and edge melting device of plastic packaging bag embossing machine - Google Patents

Abstract

The utility model discloses a plastic packaging bag coining mill's earnestly limit device that melts includes the frame, the frame includes a pair of frame plate, be equipped with the feed mechanism who is used for introducing the frame with two-layer plastic film in the frame, be equipped with the coining mechanism who is used for knurling to plastic film in the frame, be equipped with respectively on the frame plate of both sides and melt the limit sword fagging, be connected with on the sword fagging that melts the limit and cut the crossbeam, both sides are melted and are connected with the limit sword slide rail mounting panel that melts of a pair of parallel between the sword crossbeam, it is equipped with and melts limit sword slide rail to melt limit sword mounting panel bottom, it is connected with a pair of limit sword subassembly to melt limit sword slide rail bottom to slide, melt the limit sword subassembly including being used for generating heat and melt the limit sword of cutting the plastic film, the both ends of melting the limit sword subassembly are connected respectively on both sides melt the. This hot-cutting of plastic packaging bag coining mill melts the condition of limit device and is favorable to reducing the bubble that appears in the in-process of plastic film hot melt banding.

Description

Hot cutting and edge melting device of plastic packaging bag embossing machine

Technical Field

The utility model relates to a hot cutting and edge melting device of plastic packaging bag embossing machine belongs to packaging and processing equipment technical field.

Background

The plastic packaging bag is a packaging bag produced by taking various plastics as raw materials, is used for producing various articles in daily life, is widely used in various aspects in daily life and industrial production, and can be divided into the following parts according to the difference of product structures and purposes: plastic woven bags and plastic film bags. The plastic packaging bag is popular because it is light, easy to carry, low in cost, convenient to store after being orderly folded, and does not occupy too much storage space.

In the process of processing the plastic packaging bag, one key procedure is to thermally melt and press the side surfaces of two plastic films, press the plastic films into a plastic film cylinder, then cut, segment and seal the bottom to obtain the plastic packaging bag. The traditional hot pressing mode is easy to generate bubbles in the process of pressing two plastic films, and the plastic packaging bag with the bubbles on the edge sealing side is easy to crack at the side edge in the using process, so that the plastic packaging bag belongs to an unqualified product. In addition, in the processing process, operators need to pay attention to whether bubbles appear on the side edge of the plastic bag barrel or not at any time, and the workload of the operators is increased.

Disclosure of Invention

For overcoming the not enough of prior art, the utility model provides a hot-cutting edge melting device of plastic packaging bag coining mill is favorable to reducing the condition that the bubble appears in the in-process of plastic film hot melt banding.

For realizing above-mentioned mesh, the utility model discloses a hot-cutting edge melting device of plastic packaging bag coining mill includes the frame, the frame includes a pair of frame plate that sets up relatively, be equipped with the feed mechanism who is used for introducing the frame with two-layer plastic film in the frame, still be equipped with the knurling mechanism that is used for knurling to plastic film in the frame, be equipped with the edge melting sword fagging on the frame plate of both sides respectively, be connected with the edge melting sword crossbeam on the edge melting sword fagging, be connected with the edge melting sword slide rail mounting panel of a pair of parallel between the edge melting sword crossbeam of both sides, edge melting sword slide rail mounting panel bottom is equipped with the edge melting sword slide rail, edge melting sword slide rail bottom slides and is connected with a pair of edge melting sword subassembly, edge melting sword subassembly is including the edge melting sword that is used for generating heat to cut plastic film, edge sword subassembly's both ends are connected respectively on the edge melting sword slide rail of both sides, it.

Furthermore, one end of the edge melting knife, which is close to the feeding end of the rack, is lower than the other end of the edge melting knife, and the straight line of the edge melting knife in the length direction is tangent to the lower roller of the edge melting knife.

Furthermore, the edge melting knife assembly comprises an edge melting knife fixing plate, edge melting knife positioning sliders are arranged at two ends of the top surface of the edge melting knife fixing plate respectively, and a pair of edge melting knife positioning sliders are connected to edge melting knife sliding rails on two sides in a sliding mode respectively.

Furthermore, an adjusting screw rod is connected between the edge melting knife beams on the two sides, the two ends of the adjusting screw rod are respectively connected to the edge melting knife beams on the two sides in a rotating mode, the spiral directions of threads at the two ends of the adjusting screw rod are opposite, an adjusting nut matched with the adjusting screw rod is arranged on the edge melting knife fixing plate, and the two adjusting nuts are respectively connected to the threads at the two ends of the adjusting screw rod in a threaded mode.

Furthermore, both ends of the bottom surface of the edge melting knife fixing plate are provided with edge melting control bearings, edge melting control linear bearing shafts penetrate through the edge melting control bearings, the edge melting knife assembly further comprises edge melting knife hanging plates, and both ends of the edge melting knife hanging plates are connected to the bottom ends of the edge melting control linear bearing shafts respectively.

Furthermore, a melting edge control cylinder with a piston rod extending downwards is arranged on the melting edge cutter fixing plate, a cylinder body of the melting edge control cylinder is fixed on the melting edge cutter fixing plate, a floating joint is arranged at the top end of the piston rod of the melting edge control cylinder, and one end, away from the piston rod of the melting edge control cylinder, of the floating joint is connected to the melting edge cutter hanging plate.

Furthermore, a melting edge knife adjusting hanging block is arranged at one end, close to the feeding end of the rack, of the bottom surface of the melting edge knife hanging plate, a melting edge knife adjusting hole is formed in the melting edge knife hanging plate, a melting edge knife adjusting rod penetrating through the melting edge knife adjusting hole is arranged at the top of the melting edge knife adjusting hanging block, a locking bolt penetrating through the melting edge knife adjusting hole and used for locking the melting edge knife adjusting rod is arranged on the melting edge knife hanging plate, a melting edge knife hanging block is arranged at one end, far away from the feeding end of the rack, of the bottom surface of the melting edge knife hanging plate, a melting edge knife hanging rod is arranged at the bottom end of the melting edge knife hanging rod, a rotating shaft hole is formed in the bottom end of the melting edge knife hanging rod, an adjusting shaft rotatably connected into the rotating shaft hole is arranged between two side plates at the top of the melting edge knife hanging block, and two ends of.

Furthermore, one side of each frame plate on the two sides, which is opposite to the frame plates, is provided with a horizontal adjusting support plate, a through waist-shaped groove is formed in each adjusting support plate, two ends of the lower roller shaft of the edge melting cutter are provided with adjusting screw holes which vertically extend, and a bolt assembly penetrating through the waist-shaped groove is arranged in each adjusting bolt.

Furthermore, a separating pipe is arranged at one end, away from the feeding end of the frame, of the edge melting knife fixing plate, and a separating rod with a bent bottom end penetrates through the separating pipe.

Further, be connected with a pair of transfer roller between the top of both sides frame plate, the both ends of two transfer rollers rotate respectively and connect on the frame plate of both sides, and two transfer rollers are located the both sides of bilateral hot melt cutting mechanism respectively.

The utility model discloses a hot-cutting edge melting device of plastic packaging bag coining mill is favorable to reducing the condition that the bubble appears in the in-process of plastic film hot melt banding.

Drawings

The invention will be further described and illustrated with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a hot-cutting and edge-melting device of an embossing machine for plastic packaging bags according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of the discharge end of the hot-cutting and edge-melting device of the embossing machine for plastic packaging bags according to the preferred embodiment of the present invention;

FIG. 3 is a side view of the hot-cut welt-melting device of the embossing machine for plastic bags according to the preferred embodiment of the present invention after removing a side shelf;

FIG. 4 is an enlarged view at A of FIG. 1;

FIG. 5 is an enlarged view at B in FIG. 1;

FIG. 6 is an enlarged view at C of FIG. 1;

FIG. 7 is an enlarged view at D of FIG. 2;

fig. 8 is an enlarged view at E in fig. 3.

Reference numerals: 1. a frame; 11. a frame plate; 12. channel steel; 13. a conveying roller; 14. an upper discharging roller; 15. a lower discharging roller; 16. a tension roller; 2. a feeding mechanism; 21. a feeding guide roller; 22. a traction roller; 23. drawing the compression roller; 231. a traction guide rail; 232. a traction slide block; 24. a traction motor; 25. a traction cylinder mounting plate; 251. a traction cylinder; 3. a double-side hot melting cutting mechanism; 31. a fused edge knife supporting plate; 32. a melting edge knife beam; 33. a sliding rail mounting plate of the edge melting cutter; 331. a melting edge tool slide rail; 34. a fused edge cutter assembly; 341. a trimming cutter; 342. a fixing plate of the edge melting cutter; 343. a positioning slide block of the edge melting knife; 344. a fused edge cutter hanging plate; 345. a bearing is controlled by melting; 346. controlling a linear bearing shaft by melting edges; 347. a fused edge control cylinder; 348. a floating joint; 35. adjusting the screw rod; 351. adjusting the nut; 36. a fused edge tool hanging block; 361. a scrap cutter boom; 362. an adjustment shaft; 363. a rotating shaft hole; 37. adjusting a hanging block of the edge melting cutter; 371. adjusting a rod of the edge melting cutter; 372. a regulating hole of the edge melting cutter; 38. a lower roller of the edge melting cutter; 381. adjusting the screw hole; 39. adjusting the support plate; 391. a kidney-shaped groove; 4. a separating mechanism; 411. a separation tube; 42. a separating lever; 421. separating the hook; 422. a handle; 423. an elastic retaining ring; 5. an embossing mechanism; 51. an embossing roll; 52. an embossing take-up roll; 53. an embossing guide rail; 54. an embossing slider; 55. an embossing cylinder mounting plate; 551. an embossing cylinder; 56. embossing a traction motor; 6. a guide mechanism; 61. a guide frame; 62. a guide plate; 63. a guide roller; 7. a sensor seat; 71. a weighing sensor; 72. a sensor guide roller seat; 73. and (4) weighing the roller.

Detailed Description

The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses plastic packaging bag coining mill's hot-cutting edge melting device of preferred embodiment includes frame 1, and frame 1 includes a pair of frame plate 11 of relative setting, and the vertical setting of frame plate 11 is subaerial, is connected with a plurality of channel-section steels 12 between the frame plate 11 of both sides, provides certain structural strength by channel-section steel 12. The frame 1 is provided with a feeding mechanism 2 for introducing two layers of plastic films into the frame 1, and the two layers of plastic films can be made of the same material or different materials; the frame 1 is provided with a bilateral hot-melting cutting mechanism 3 for carrying out hot-pressing, melting and edge sealing on two side edges of two layers of plastic films, and after the treatment of the bilateral hot-melting cutting mechanism 3, the two layers of plastic films are tightly attached and two side edges in the length direction are fused to form a long cylindrical plastic bag cylinder; referring to fig. 2, a separating mechanism 4 is arranged on the frame 1, and redundant plastic films on two sides of the plastic bag cylinder after the plastic bag cylinder is hot-melted are separated and removed from the edge of the plastic bag cylinder through the separating mechanism 4; the frame 1 is provided with an embossing mechanism 5 for embossing the plastic bag cylinder; a guiding mechanism 6 is arranged between the bilateral hot melting cutting mechanism 3 and the embossing mechanism 5 on the frame 1.

Referring to fig. 1 and 5, the feeding mechanism 2 includes a feeding guide roller 21 provided at the left end of the frame 1, and two plastic films are first overlapped on the feeding guide roller 21 and then enter the frame 1. The feeding mechanism 2 further comprises a traction compression roller 23 and a traction roller 22 which are arranged at the feeding end of the rack 1, the traction compression roller 23 is located right above the traction roller 22, the inner sides of the frame plates 11 at the two sides are respectively provided with a traction guide rail 231, and the traction guide rails 231 extend in the vertical direction. The traction guide rails 231 on the two sides are connected with traction sliding blocks 232 in a sliding mode respectively, and the two ends of the roll shaft of the traction compression roller 23 are connected to the traction sliding blocks 232 in a rotating mode respectively. The frame 1 is provided with a traction cylinder mounting plate 25, two ends of the traction cylinder mounting plate 25 are respectively provided with a traction cylinder 251, a piston rod of the traction cylinder 251 is arranged downwards and connected to a corresponding traction sliding block 232, the traction sliding block 232 slides along a traction guide rail 231 through telescopic pulling of the piston rod of the traction cylinder 251, so that the traction compression roller 23 moves in the vertical direction, and two plastic films are further pressed to be tightly attached together. A traction motor 24 is arranged on the frame 1, and the output end of the traction motor 24 is connected with a roll shaft belt of the traction roll 22 through a belt. The traction motor 24 drives the traction roller 22 to rotate, and provides required driving force for the feeding process.

Referring to fig. 1 and 3, two layers of plastic films entering the rack 1 through the feeding mechanism 2 enter the bilateral hot-melting cutting mechanism 3, the bilateral hot-melting cutting mechanism 3 comprises edge melting knife supporting plates 31 respectively arranged on the two side frame plates 11, the top ends of the edge melting knife supporting plates 31 are connected with edge melting knife beams 32 horizontally arranged, a pair of parallel edge melting knife slide rail mounting plates 33 is connected between the edge melting knife beams 32 on the two sides, and edge melting knife slide rails 331 are arranged at the bottoms of the edge melting knife slide rail mounting plates 33.

Referring to fig. 1 and 3, a pair of edge melting knife assemblies 34 is slidably connected to the bottom of the edge melting knife slide rail 331, as shown in fig. 4, an edge melting knife 341 capable of generating high temperature is disposed on the edge melting knife assembly 34, and the edge melting knife 341 performs fast melting cutting on the side edges of the two layers of plastic films at high temperature. The edge melting knife assembly 34 comprises an edge melting knife fixing plate 342, the edge melting knife fixing plate 342 is perpendicular to the edge melting knife slide rails 331 and is arranged in the length direction, edge melting knife positioning sliders 343 are arranged at two ends of the top surface of the edge melting knife fixing plate 342 respectively, and the two edge melting knife positioning sliders 343 are connected to the two edge melting knife slide rails 331 in a sliding mode respectively. An adjusting screw 35 is connected between the edge melting knife beams 32 on the two sides, the two ends of the adjusting screw 35 are respectively and rotatably connected to the edge melting knife beams 32 on the two sides, and the screw thread directions of the two ends of the adjusting screw 35 are opposite by taking the radial middle point of the adjusting screw as a boundary. Adjusting nuts 351 are arranged on the top surfaces of the two edge melting cutter fixing plates 342, and the two adjusting nuts 351 are respectively matched with the two sections of threads on the adjusting screw 35. By rotating the adjusting screw 35, the two edge melting knife assemblies 34 can slide in opposite directions in the horizontal direction along the edge melting knife slide rails 331, so that the relative distance between the pair of edge melting knife assemblies 34 can be adjusted, and the width of the melt-cut plastic packaging bag can be controlled.

Referring to fig. 4 and 8, the edge melting knife assembly 34 further includes an edge melting knife hanging plate 344, both ends of the edge melting knife hanging plate 344 are provided with edge melting control linear bearing shafts 346, both ends of the edge melting knife fixing plate 342 are provided with edge melting control bearings 345 engaged with the edge melting control linear bearing shafts 346, and the edge melting knife hanging plate 344 can move up and down with the plane of the edge melting knife fixing plate 342 as a reference plane. The edge melting knife fixing plate 342 is provided with an edge melting control cylinder 347, the cylinder body of the edge melting control cylinder 347 is fixed on the edge melting knife fixing plate 342, and the piston rod of the edge melting control cylinder 347 penetrates through the edge melting knife fixing plate 342 to extend downwards. The top of the piston rod of the melting edge control cylinder 347 is provided with a floating joint 348, and one end of the floating joint 348 far away from the piston rod of the melting edge control cylinder 347 is connected to the melting edge knife hanging plate 344. The raising and lowering of the holder plate 344 is controlled by the holder control cylinder 347.

Referring to fig. 4 and 8, a trimming knife hanging block 36 and a trimming knife adjusting hanging block 37 are respectively disposed at two ends of the bottom of the trimming knife hanging plate 344, and two ends of the trimming knife 341 are respectively connected to the lower ends of the trimming knife hanging block 36 and the trimming knife adjusting hanging block 37 through bolt assemblies. The trimming knife adjusting hanging block 37 is positioned at one end of the trimming knife 344, close to the feeding direction, of the hanging plate. A melting edge knife adjusting rod 371 is arranged between the melting edge knife adjusting hanging block 36 and the melting edge knife hanging plate 344, a melting edge knife adjusting hole 372 is formed in the melting edge knife hanging plate 344, the melting edge knife adjusting rod 371 penetrates through the melting edge knife adjusting hole 372 and can slide up and down in the melting edge knife adjusting hole 372, and a locking bolt used for fixing the melting edge knife adjusting rod 371 is arranged on the melting edge knife hanging plate 344. The edge melting knife hanging block 36 is located at one end, far away from the feeding direction, of the edge melting knife hanging plate 344, an edge melting knife hanging rod 361 is arranged at the bottom of the edge melting knife hanging plate 344, a rotating shaft hole 363 is arranged at the bottom end of the edge melting knife hanging rod 361, an adjusting shaft 362 is arranged between two side plates of the top of the edge melting knife hanging block 36, and the adjusting shaft 362 penetrates through the rotating shaft hole 363 and can rotate in the rotating shaft hole 363. After the fixing of the locking bolt to the trimming knife adjusting rod 371 is released, the trimming knife adjusting rod 371 can slide up and down in the trimming knife adjusting hole 372, the height of the trimming knife adjusting hanging block 37 is changed, and in the process of changing the height of the trimming knife adjusting hanging block 37, the height of the trimming knife hanging block 36 is kept unchanged, so that the inclination angle of the trimming knife 341 installed between the two is changed.

Referring to fig. 6, the double-sided thermal cutting mechanism 3 further includes a lower edge melting blade roller 38 disposed between the two side frame plates 11, and the lower edge melting blade roller 38 is located below the edge melting blade 341. The two opposite sides of the frame plates 11 on the two sides are respectively provided with an adjusting support plate 39 extending horizontally, the adjusting support plates 39 are respectively provided with a kidney-shaped groove 391, the two ends of the roll shaft of the lower edge melting knife roller 38 are respectively provided with a vertical adjusting screw hole 381, and the lower edge melting knife roller 38 can be fixed at the corresponding position on the kidney-shaped groove 391 by penetrating a bolt assembly into the adjusting screw holes 381 and penetrating the kidney-shaped groove 391, so that the position of the lower edge melting knife roller 38 in the feeding direction can be adjusted. When the plastic film enters the melt-cutting process, the lower roll 38 of the edge melting knife pads up the plastic film, so that the plastic film is in a state of being conveyed in an inclined upward direction. In the embodiment, the height of the hanging block 37 is adjusted by adjusting the edge melting knife, so that the edge melting knife 341 always keeps an inclination angle of left lower and right higher, and when the plastic film contacts the edge melting knife 341, the edge melting knife 341 is just perpendicular to the normal of the arc formed at the bending position of the plastic film, and the air bubbles between the two layers of plastic films can be avoided to the maximum extent.

Referring to fig. 3, separating mechanism 4 is including setting up the separation hole of keeping away from frame 1 material loading end at melting edge sword fixed plate 342, and melting edge sword fixed plate 342 below extends separating tube 411 along the separation hole, wears to be equipped with separation rod 42 in the separating tube 411, and the bottom of separation rod 42 is equipped with the separation of buckling and colludes 421, and the top of separation colluding 421 is established to the pointed end, is in operating condition promptly when separation rod 42 puts down, can be with the plastic film side through the melt-cut and a plastic bag section of thick bamboo separation. The separating rod 42 is provided with an elastic snap ring 423, and the elastic snap ring 423 can clamp the separating rod 42 in the separating pipe 411 to enable the separating rod 42 to be separated from the working state. The top end of the separation rod 42 is provided with a handle 422 for an operator to hold, and the outer diameter of the handle 422 is larger than the inner diameter of the separation tube 411.

Referring to fig. 1 and 3, the embossing mechanism 5 includes an embossing roller 51 and an embossing pulling roller 52 disposed between the two side frame plates 11, the embossing roller 51 is disposed above the embossing pulling roller 52, and the outer circumferential surfaces of the embossing roller 51 and the embossing pulling roller 52 have embossments, and various embossments can be used according to the requirements of products. As shown in fig. 7, the inner sides of the two side frame plates 11 are respectively provided with an embossing guide rail 53, the embossing guide rails 53 extend in the vertical direction, the embossing guide rails 53 on the two sides are respectively connected with an embossing slider 54 in a sliding manner, and two ends of a roller shaft of the embossing roller 51 are respectively connected with the embossing slider 54 in a rotating manner. An embossing cylinder mounting plate 55 is connected between the two side frame plates 11, embossing cylinders 551 are respectively arranged at two ends of the embossing cylinder mounting plate 55, piston rods of the embossing cylinders 551 are downwards arranged and connected to corresponding embossing sliders 54, and the embossing rollers 51 move in the vertical direction through the stretching of the piston rods of the embossing cylinders 551. So that the embossing roller 51 can exert a certain pressure on the embossing take-off roller 52 and thus emboss a pattern in the plastic bag tube. The frame 1 is provided with an embossing traction motor 56, and the output end of the embossing traction motor 56 is connected with the roll shaft belt of the embossing traction roller 52 through a belt to provide the driving force for the rotation of the embossing roller 51.

Referring to fig. 2, the guiding mechanism 6 includes a guiding frame 61 disposed on the frame 1, the guiding frame 61 includes a pair of vertical guiding plates 62, the guiding plates 62 are disposed on the frame plates 11 on both sides respectively, 3 guiding rollers 63 are disposed between the guiding plates 62 on both sides, both ends of the guiding rollers 63 are rotatably connected to the guiding plates 62 on both sides respectively, and the 3 guiding rollers 63 are uniformly distributed in the height direction of the guiding plates 62 at equal intervals. The guide plates 62 on the two sides are respectively provided with a sensor base 7, the sensor base 7 is provided with a weighing sensor 71, the weighing sensor 71 is provided with a sensor guide roller base 72, a weighing roller 73 is connected between the sensor guide roller bases 72 on the two sides, the two ends of the weighing roller 73 are respectively rotatably connected to the sensor guide roller bases 72, and a plastic bag barrel passing through the weighing roller 73 can be weighed through the weighing sensor 71.

Referring to fig. 1 and 3, a pair of conveying rollers 13 is connected between the top ends of the frame plates 11 on the two sides, two ends of the two conveying rollers 13 are respectively rotatably connected to the frame plates 11 on the two sides, the two conveying rollers 13 are respectively located on two sides of the double-side hot-cutting mechanism 3, and the two conveying rollers 13 jointly support the plastic film. A tension roller 16 is also arranged between the guide frame 61 and the conveying roller 13 far away from the feeding end of the frame 1, and the tension roller 16 is positioned at the bottom end of the frame plate 11.

Referring to fig. 1 and 3, the discharging end of the frame 1 is provided with an upper discharging roller 14 and a lower discharging roller 15, the upper discharging roller 14 is located above the lower discharging roller 15 close to the feeding end of the frame 1, and the embossed plastic bag barrel is discharged from the frame 1 through the upper discharging roller 14 and the lower discharging roller 15.

The utility model discloses a hot-cutting edge melting device of plastic packaging bag coining mill is favorable to reducing the condition that the bubble appears in the in-process of plastic film hot melt banding.

The above detailed description merely describes the preferred embodiments of the present invention and does not limit the scope of the present invention. Without departing from the design concept and spirit scope of the present invention, the ordinary skilled in the art should belong to the protection scope of the present invention according to the present invention provides the text description and drawings to the various modifications, replacements and improvements made by the technical solution of the present invention. The scope of protection of the present invention is determined by the claims.

Claims (10)

1. A hot cutting and edge melting device of a plastic packaging bag embossing machine comprises a frame, wherein the frame comprises a pair of frame plates which are oppositely arranged, the frame is provided with a feeding mechanism for introducing two layers of plastic films into the frame, the frame is also provided with an embossing mechanism for embossing the plastic films, it is characterized in that the frame plates at two sides are respectively provided with a fused edge knife supporting plate, the fused edge knife supporting plates are connected with fused edge knife beams, a pair of parallel fused edge knife slide rail mounting plates are connected between the fused edge knife beams at two sides, the bottom of the edge melting knife slide rail mounting plate is provided with an edge melting knife slide rail, the bottom of the edge melting knife slide rail is connected with a pair of edge melting knife components in a sliding way, the edge melting knife assembly comprises an edge melting knife used for heating and melting and cutting the plastic film, two ends of the edge melting knife assembly are connected to edge melting knife sliding rails on two sides respectively, and two sides of the frame plate are located below the edge melting knife assembly and are provided with edge melting knife lower rollers matched with the edge melting knife assembly.

2. The hot-cutting and edge-melting device of an embossing machine for plastic bags as recited in claim 1, wherein the edge-melting knife is lower at one end close to the feeding end of the machine frame than at the other end, and the straight line along the length direction of the edge-melting knife is tangent to the lower roller of the edge-melting knife.

3. The hot-cutting edge-melting device of an embossing machine for plastic packaging bags according to claim 1, wherein the edge-melting knife assembly comprises an edge-melting knife fixing plate, edge-melting knife positioning sliding blocks are respectively arranged at two ends of the top surface of the edge-melting knife fixing plate, and a pair of edge-melting knife positioning sliding blocks are respectively connected to edge-melting knife sliding rails at two sides in a sliding manner.

4. The hot-cutting edge melting device of the embossing machine for the plastic packaging bags according to claim 3, wherein an adjusting screw is connected between the edge melting knife beams on two sides, two ends of the adjusting screw are respectively and rotatably connected to the edge melting knife beams on two sides, the screw threads at two ends of the adjusting screw are opposite in spiral direction, an adjusting nut matched with the adjusting screw is arranged on the edge melting knife fixing plate, and the two adjusting nuts are respectively and threadedly connected to the screw threads at two ends of the adjusting screw.

5. The hot-cutting edge-melting device of the embossing machine for the plastic packaging bags according to claim 3, wherein both ends of the bottom surface of the edge-melting knife fixing plate are provided with edge-melting control bearings, edge-melting control linear bearing shafts are penetrated in the edge-melting control bearings, the edge-melting knife assembly further comprises an edge-melting knife hanging plate, and both ends of the edge-melting knife hanging plate are respectively connected to the bottom ends of the edge-melting control linear bearing shafts.

6. The hot-cutting edge melting device of the embossing machine for the plastic packaging bags according to claim 5, wherein the edge melting knife fixing plate is provided with an edge melting control cylinder with a piston rod extending downwards, the cylinder body of the edge melting control cylinder is fixed on the edge melting knife fixing plate, the top end of the piston rod of the edge melting control cylinder is provided with a floating joint, and one end of the floating joint, which is far away from the piston rod of the edge melting control cylinder, is connected to the edge melting knife hanging plate.

7. The hot-cutting and edge-melting apparatus of an embossing machine for plastic bags according to claim 5, one end of the bottom surface of the edge melting knife hanging plate, which is close to the feeding end of the frame, is provided with an edge melting knife adjusting hanging block, the edge melting knife hanging plate is provided with an edge melting knife adjusting hole, the top of the edge melting knife adjusting hanging block is provided with an edge melting knife adjusting rod which passes through an edge melting knife adjusting hole, the edge melting knife hanging plate is provided with a locking bolt which passes through the edge melting knife adjusting hole and is used for locking the edge melting knife adjusting rod, one end of the bottom surface of the edge melting knife hanging plate, which is far away from the feeding end of the frame, is provided with an edge melting knife hanging block, the bottom surface of the edge melting knife hanging plate is provided with an edge melting knife hanging rod, the bottom end of the edge melting knife hanging rod is provided with a rotating shaft hole, an adjusting shaft which is rotatably connected in the rotating shaft hole is arranged between two side plates at the top of the edge melting knife hanging block, and two ends of the edge melting knife are respectively connected to the bottom of the edge melting knife adjusting hanging block and the bottom of the edge melting knife hanging block.

8. The hot-cutting and edge-melting device of an embossing machine for plastic bags as claimed in claim 1, wherein the opposite sides of the frame plates on both sides are respectively provided with a horizontal adjusting plate, the adjusting plate is provided with a through waist-shaped groove, both ends of the roller shaft of the lower roller of the edge-melting knife are respectively provided with a vertically extending adjusting screw hole, and the adjusting screw hole is provided with a bolt assembly passing through the waist-shaped groove.

9. The hot-cutting and edge-melting device of an embossing machine for plastic packaging bags according to claim 3, characterized in that a separating tube is arranged at one end of the edge-melting knife fixing plate, which is far away from the feeding end of the frame, and a separating rod with a bent bottom end is arranged in the separating tube in a penetrating way.

10. The hot-cutting and edge-melting device of an embossing machine for plastic bags according to claim 1, wherein a pair of conveying rollers are connected between the top ends of the two side frame plates, two ends of the two conveying rollers are respectively rotatably connected to the two side frame plates, and the two conveying rollers are respectively located at two sides of the double-side hot-cutting mechanism.

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