A cotton strip automatic bagging and sealing device

Abstract

The present invention relates to the technical field of glass wool strip processing, and discloses an automatic bagging and sealing device for cotton strips, comprising a frame, a heat sealing device and a thermoplastic machine arranged on the frame, wherein a conveyor belt is arranged in the thermoplastic machine, the heat sealing device comprises a heat cutting mechanism and a shrinking mechanism, the shrinking mechanism comprises a descending cylinder, a shrinking frame, a thermoplastic knife arranged on the shrinking frame, and a shrinking driving member driving the thermoplastic knife to move closer to or away from each other, the descending mechanism is vertically arranged on the frame, the shrinking frame is arranged at the piston end of the descending cylinder, two shrinking frames are arranged on both sides of the conveyor belt, two thermoplastic knives are arranged oppositely at one end of the shrinking frame, and the shrinking driving member drives the two thermoplastic knives to move closer to or away from each other. The present invention can achieve the effect of automatic bagging and packaging of cotton strips.

Description

Technical Field

[0001] The invention relates to the technical field of glass wool strip processing, and in particular to an automatic bagging and sealing device for cotton strips. Background Art

[0002] Glass wool is a type of glass fiber and is a man-made inorganic fiber. It uses natural minerals such as quartz sand, limestone, dolomite, etc. as the main raw materials, and is melted into glass with some chemical raw materials such as soda ash and borax. In the molten state, it is blown into flocculent fine fibers with the help of external force. The fibers are three-dimensionally crossed and entangled with each other, showing many small gaps. This gap can be regarded as pores. Therefore, glass wool can be regarded as a porous material with good thermal insulation and sound absorption properties.

[0003] The Chinese utility model patent with the authorization announcement number CN217836167U discloses a vacuum packaging device for glass wool. The utility model discloses a vacuum packaging device for glass wool, including a winding funnel, a winding outlet is provided on one side of the winding funnel, an inclined slide connected to the winding outlet is provided at the bottom of the winding funnel, the winding funnel is located outside the winding outlet and is inclinedly provided with a winding groove aligned with the inclined slide, a vacuum device is provided at one end of the winding groove away from the winding outlet, and a bagging device is provided between the winding outlet and the winding groove. The bagging device includes a plurality of sliding rods slidably connected to the roll outlet, a plurality of clamping rods on the hinged roll receiving funnel, a connecting rod between the hinged clamping rod and the sliding rod, a tensioning rod fixed to the sliding rod and close to the roll outlet, and a cylinder fixed to the roll receiving funnel and driving the sliding rod to slide. The sliding rods evenly surround the edge of the roll outlet, and the sliding direction of the sliding rods points to the axis of the roll outlet. The clamping rods are located between the connecting rods and the tensioning rods, and the clamping rods are hinged at the roll receiving funnel to open an opening for the sliding rods to pass through. The advantages of this utility model: it can achieve the effect of automatic bagging and vacuum packaging. However, the device requires manual advance placement of the bag mouth of the packaging bag on the tensioning rod on the bagging device, and cannot achieve the fully automated bagging process of the glass wool strips. The degree of automation is low, and the efficiency of manual bagging is low. Summary of the invention

[0004] The object of the present invention is to provide a sliver automatic bagging and sealing device, which has the effects of automatic bagging and sealing of slivers.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a sliver automatic bagging and sealing device, comprising a frame, a heat sealing device and a thermoplastic machine arranged on the frame, a conveyor belt being arranged in the thermoplastic machine, the heat sealing device comprising a hot cutting mechanism and a shrinking mechanism, the shrinking mechanism comprising a descending cylinder, a shrinking frame, a thermoplastic knife arranged on the shrinking frame, and a shrinking driving member driving the thermoplastic knife to move closer to or away from each other, the descending mechanism is vertically arranged on the frame, the shrinking frame is arranged at the piston end of the descending cylinder, two shrinking frames are arranged on both sides of the conveyor belt, two thermoplastic knives are relatively arranged at one end of the shrinking frame, and the shrinking driving member drives the two thermoplastic knives to move closer to or away from each other.

[0006] By adopting the above technical scheme, the effect of automatic bagging and packaging of cotton strips can be achieved. After the cotton strips are conveyed to the frame, the pushing cylinder will push the cotton strips forward. At this time, there is unfolded packaging plastic on the frame. During the pushing process, the cotton strips will be wrapped by the packaging plastic and then pushed onto the conveyor belt at the feeding end of the thermoplastic machine. Then the hot cutting mechanism will cut off the packaging plastic. At this time, one side of the packaging plastic belt is connected, and the side close to the cotton strip is cut off and packaged. Then the descending cylinder of the shrinking mechanism will drive the shrinking frame to descend to the end of the cotton strip. The shrinking driving member will drive the two thermoplastic knives to approach each other, so that the packaging plastic extending from the two ends of the cotton strip shrinks. Then the two ends of the cotton strip are shrunk. At this time, the packaging plastic wrapped by the cotton strip is in a loose state. The conveyor belt conveys the bagged cotton strips to the thermoplastic machine, so that the packaging plastic further shrinks. At this time, the cotton strips are completely wrapped by the packaging plastic. The shrinking mechanism in the present invention can realize that the excess plastic at the two ends of the cotton strip is first radially shrunk, so as to avoid the axial shrinkage of the plastic directly in the thermoplastic machine and the inability to wrap the two ends of the cotton strip.

[0007] The present invention is further configured as follows: the contraction drive component includes a drive motor fixedly connected to the contraction frame, a conical cam connected to the output end of the drive motor, a rocker rod rotatably connected to the contraction frame, and a spring connected between the two rocker rods, one end of the rocker rod close to the conical cam is in contact with the conical cam, the thermoplastic knife is fixedly arranged at one end of the rocker rod away from the conical cam, and the spring is connected to one side of the rocker rod close to the conical cam.

[0008] By adopting the above technical solution, the driving motor drives the conical cam to rotate. Since the conical cam has two relatively protruding parts, when the conical cam rotates, the protruding part of the conical cam will push the upper end of the rocker arm to separate, and then the lower ends of the two rocker arms will approach each other, so that the two thermoplastic knives can shrink the plastic belt at the end of the cotton strip. Then, when the conical cam continues to rotate, the rebound force of the spring will pull the two rocker arms to keep in contact with the conical cam, so that the upper end of the rocker arm gradually approaches and the lower end gradually moves away.

[0009] The present invention is further configured as follows: the length of the protruding part of the conical cam gradually decreases from one end to the other end, a rotating rod is provided on the retracting frame, the conical cam is slidably connected to the rotating rod, the driving motor drives the rotating rod to drive the conical cam to rotate, and an adjusting member is provided on the conical cam, and the adjusting member controls the conical cam to slide along the rotating rod.

[0010] The present invention is further configured as follows: the adjusting member includes a groove, a clamping column, a threaded rod, and a handwheel, the groove is coaxially fixedly connected to the end of the conical cam and slidably connected to the rotating rod, a threaded hole is opened on the retracting frame, the threaded rod is threadedly connected in the threaded hole, the clamping column is radially fixedly arranged at the end of the threaded hole, the clamping column is movably clamped in the groove, and a handwheel is arranged at the end of the threaded rod.

[0011] By adopting the above technical scheme, the present invention can adjust the unfolding distance between the two thermoplastic knives. Since the length of the protruding part of the conical cam gradually decreases from one end to the other end, the adjusting member will control the contact position between the conical cam and the upper end of the rocker arm. When the rocker arm contacts the longer position of the conical cam, the rotation angle of the rocker arm will become larger. At this time, the thermoplastic machine can shrink a greater distance. When the rocker arm contacts the shorter position of the conical cam, the rotation angle of the rocker arm will become smaller. At this time, the thermoplastic machine can shrink a smaller distance. This setting can realize the packaging of cotton strip ends of different thicknesses. By turning the hand wheel, the threaded rod is driven to rotate and the threaded rod is extended and retracted. The clamping column at the end is further driven to drive the conical cam to slide along the rotating rod through the pulling groove, thereby realizing the change of the contact position between the rocker arm and the conical cam.

[0012] The present invention is further configured as follows: the hot cutting mechanism includes a hot cutting frame, a heat sealing knife, a hot cutting motor, a synchronization rod, a control rod, and a driving rod; the two ends of the two heat sealing knives are slidably connected to the hot cutting frame, the synchronization rod is rotatably connected to the hot cutting frame, the two driving rods are fixedly connected to the ends of the synchronization rod, the driving rod is perpendicular to the synchronization rod, the control rod includes a first control rod and a second control rod, the two ends of the first control rod are respectively connected to the heat sealing knife located below and the upper end of the driving rod, the two ends of the second control rod are respectively connected to the end of the heat sealing knife located above and the lower end of the driving rod, and the driving motor drives the synchronization rod to rotate.

[0013] By adopting the above technical solution, the function of cutting off the packaged plastic can be realized. The hot cutting motor drives the synchronous rod to rotate, and the rotation of the synchronous rod drives the rotation of the driving rods at both ends. Since the upper heat sealing knife is rotatably connected to the lower end of the driving rod through the second control rod, the lower heat sealing knife is rotatably connected to the upper end of the driving rod through the first control rod, and the driving rods at both ends are arranged in parallel, when the synchronous rod rotates, the upper heat sealing knife and the lower heat sealing knife can be moved closer to or farther away from each other.

[0014] The present invention is further configured as follows: a centering mechanism is also provided on the frame, and the centering mechanism includes a centering motor, a centering screw, a guide rod and a centering plate, the centering screw and the guide rod are rotatably connected to the frame, the centering motor is connected to the end of the centering screw, and the lower end of the centering plate is threadedly connected to the centering screw and rotatably connected to the guide rod.

[0015] By adopting the above technical solution, the setting of the centering mechanism can make the tampon located in the middle of the packaging plastic, avoiding the deviation of the position of the tampon so that one end of the tampon cannot be packaged due to the lack of elongation of the plastic. Therefore, the centering motor will drive the centering screw to rotate. Since opposite threads are provided at both ends of the centering screw, when the centering screw rotates, the centering pieces at both ends can approach and move away from each other, so that the tampon is located in the middle position.

[0016] The present invention is further configured as follows: one end of the swing rod in contact with the cone cam is rotatably connected to a rotating wheel.

[0017] By adopting the above technical solution, since the side surface of the cone cam is arc-shaped, the arrangement of the rotating wheel can reduce friction.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention can achieve the effect of automatic bagging and packaging of tampons. After the tampons are conveyed to the frame, the pushing cylinder will push the tampons forward. At this time, there is unfolded packaging plastic on the frame. During the pushing process, the tampons will be wrapped by the packaging plastic and then pushed onto the conveyor belt at the feeding end of the thermoplastic machine. Then, the hot cutting mechanism will cut off the packaging plastic. At this time, one side of the packaging plastic belt is connected, and the side close to the tampons is cut off and packaged. Then, the descending cylinder of the shrinking mechanism will drive the shrinking frame to descend to the end of the tampons. The shrinking driving member will drive the two thermoplastic knives to approach each other, so that the packaging plastic extending from the two ends of the tampons will shrink. Then, at this time, the two ends of the tampons are shrunk. At this time, the packaging plastic wrapped by the tampons is in a loose state. The conveyor belt conveys the bagged tampons to the thermoplastic machine, so that the packaging plastic is further shrunk. At this time, the tampons are completely wrapped by the packaging plastic. The shrinking mechanism in the present invention can realize that the excess plastic at the two ends of the tampons is first radially shrunk, so as to avoid the axial shrinkage of the plastic directly in the thermoplastic machine and the inability to wrap the two ends of the tampons.

[0020] 2. The present invention can adjust the unfolding distance between the two thermoplastic knives. Since the length of the protruding part of the cone cam gradually decreases from one end to the other end, the adjusting member will control the contact position between the cone cam and the upper end of the swing rod. When the swing rod contacts the longer position of the cone cam, the rotation angle of the swing rod will become larger, and the thermoplastic machine can shrink a larger distance at this time. When the swing rod contacts the shorter position of the cone cam, the rotation angle of the swing rod will become smaller, and the thermoplastic machine can shrink a smaller distance at this time. This setting can realize the packaging of the ends of cotton strips of different thicknesses. By turning the hand wheel, the threaded rod is driven to rotate and the threaded rod is extended and retracted, and the clamping column at the end is further driven to drive the cone cam to slide along the rotating rod through the pulling groove, thereby realizing the change of the contact position between the swing rod and the cone cam. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 It is a right-side structural schematic diagram of the present invention.

[0024] Figure 3 It is a schematic diagram of the heat sealing mechanism structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the contraction mechanism of the present invention.

[0026] Figure 5 It is a schematic diagram of the single-side structure of the contraction structure of the present invention.

[0027] Figure 6 It is a schematic diagram of the main structure of the contraction mechanism of the present invention.

[0028] Figure 7 It is a schematic diagram of the local structure of the adjusting member of the present invention.

[0029] Figure 8 It is a schematic diagram of the cone cam structure of the present invention.

[0030] Fig. 9 It is a schematic diagram of the structure of the hot cutting mechanism of the present invention.

[0031] Fig.10 It is a structural schematic diagram of the centering mechanism of the present invention.

[0032] In the figure, 1, frame; 2, thermoplastic machine; 21, conveyor belt; 3, shrinking mechanism; 31, descending cylinder; 32, shrinking frame; 33, thermoplastic knife; 34, shrinking drive member; 341, driving motor; 3411, rotating rod; 342, cone cam; 343, rocker rod; 3431, rotating wheel; 345, spring; 35, adjusting member; 351, groove; 352, clamping column; 353, threaded rod; 354, hand wheel; 4, hot cutting mechanism; 41, hot cutting frame; 42, heat sealing knife; 43, hot cutting motor; 44, synchronization rod; 45, control rod; 46, driving rod; 5, centering mechanism; 51, centering motor; 52, centering screw rod; 53, guide rod; 54, centering sheet; 6, cotton strip; 7, packaging plastic. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Examples, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a device for automatically bagging and sealing tampons 6 comprises a frame 1, a heat sealing device and a thermoplastic machine 2 arranged on the frame 1, a conveyor belt 21 is arranged in the thermoplastic machine 2, the heat sealing device comprises a hot cutting mechanism 4 and a shrinking mechanism 3, the shrinking mechanism 3 comprises a descending cylinder 31, a shrinking frame 32, a thermoplastic knife 33 arranged on the shrinking frame 32, and a shrinking driving member 34 for driving the thermoplastic knife 33 to move closer to or away from each other, the descending mechanism is vertically arranged on the frame 1, the shrinking frame 32 is arranged at the piston end of the descending cylinder 31, two shrinking frames 32 are arranged on both sides of the conveyor belt 21, two thermoplastic knives 33 are arranged opposite to each other at one end of the shrinking frame 32, and the shrinking driving member 34 drives the two thermoplastic knives 33 to move closer to or away from each other.

[0035] The present invention can achieve the effect of automatic bagging and packaging of slivers 6. After the slivers 6 are conveyed to the frame 1, the pushing cylinder will push the slivers 6 forward. At this time, there is an unfolded packaging plastic 7 on the frame 1. During the pushing process, the slivers 6 will be wrapped by the packaging plastic 7 and then pushed onto the conveyor belt 21 at the feeding end of the thermoforming machine 2. Then, the hot cutting mechanism 4 will cut off the packaging plastic 7. At this time, one side of the packaging plastic 7 belt is connected, and the side close to the slivers 6 is cut off and packaged. Then, the descending cylinder 31 of the shrinking mechanism 3 will drive the shrinking frame 32 to descend to the end of the sliver 6. The shrinking drive member 34 drives the two thermoplastic knives 33 to approach each other, so that the packaging plastic 7 extending from the two ends of the tampon 6 shrinks, and then the two ends of the tampon 6 are shrunk. At this time, the packaging plastic 7 wrapped by the tampon 6 is in a loose state, and the conveyor belt 21 conveys the bagged tampon 6 to the thermoplastic machine 2 to further shrink the packaging plastic 7. At this time, the tampon 6 is completely wrapped by the packaging plastic 7. The shrinking mechanism 3 in the present invention can realize the radial shrinkage of the excess plastic at the two ends of the tampon 6 first, so as to avoid the axial shrinkage of the plastic directly in the thermoplastic machine 2 and the inability to wrap the two ends of the tampon 6.

[0036] like Figure 4 , Figure 5 , Figure 6 As shown, the contraction drive member 34 includes a driving motor 341 fixedly connected to the contraction frame 32, a cone cam 342 connected to the output end of the driving motor 341, a swing rod 343 rotatably connected to the contraction frame 32, and a spring 345 connected between the two swing rods 343. The end of the swing rod 343 close to the cone cam 342 contacts the cone cam 342. The thermoplastic knife 33 is fixedly arranged at the end of the swing rod 343 away from the cone cam 342. The spring 345 is connected to the side of the swing rod 343 close to the cone cam 342. The end of the swing rod 343 in contact with the cone cam 342 is rotatably connected to a rotating wheel 3431. Since the side surface of the cone cam 342 is arc-shaped, the arrangement of the rotating wheel 3431 can reduce friction. The driving motor 341 drives the cone cam 342 to rotate. Since the cone cam 342 has two relatively protruding parts, when the cone cam 342 rotates, the protruding part of the cone cam 342 will push the upper end of the swing rod 343 to separate, and then the lower ends of the two swing rods 343 will approach each other, so that the two thermoplastic knives 33 can shrink the plastic belt at the end of the cotton strip 6. Then, when the cone cam 342 continues to rotate, the rebound force of the spring 345 will pull the two swing rods 343 to keep in contact with the cone cam 342, so that the upper ends of the swing rods 343 gradually approach each other and the lower ends gradually move away from each other.

[0037] like Figure 7 , Figure 8As shown, the length of the protruding part of the cone cam 342 gradually decreases from one end to the other end, a rotating rod 3411 is provided on the retracting frame 32, and the cone cam 342 is slidably connected to the rotating rod 3411. The driving motor 341 drives the rotating rod 3411 to drive the cone cam 342 to rotate, and an adjusting member 35 is provided on the cone cam 342, and the adjusting member 35 controls the cone cam 342 to slide along the rotating rod 3411. The adjusting member 35 includes a groove 351, a clamping column 352, a threaded rod 353, and a handwheel 354. The groove 351 is coaxially fixedly connected to the end of the conical cam 342 and slidably connected to the rotating rod 3411. A threaded hole is opened on the retracting frame 32. The threaded rod 353 is threadedly connected in the threaded hole. The clamping column 352 is radially fixedly arranged at the end of the threaded hole. The clamping column 352 is movably clamped in the groove 351. A handwheel 354 is arranged at the end of the threaded rod 353.

[0038] The present invention can adjust the expansion distance between the two thermoplastic knives 33. Since the length of the protruding part of the cone cam 342 gradually decreases from one end to the other end, the adjusting member 35 controls the contact position between the cone cam 342 and the upper end of the swing rod 343. When the swing rod 343 contacts the longer position of the cone cam 342, the rotation angle of the swing rod 343 will become larger, and the thermoplastic machine 2 can shrink a greater distance at this time. When the swing rod 343 contacts the shorter position of the cone cam 342, the rotation angle of the swing rod 343 will become smaller, and the thermoplastic machine 2 can shrink a smaller distance at this time. This setting can realize the packaging of the ends of the cotton strips 6 of different thicknesses. By rotating the hand wheel 354, the threaded rod 353 is driven to rotate and the threaded rod 353 is extended and retracted, and the clamping column 352 at the end is further driven to drive the cone cam 342 to slide along the rotating rod 3411 through the pulling groove 351, thereby realizing the change of the contact position between the swing rod 343 and the cone cam 342.

[0039] like Fig. 9As shown, the hot cutting mechanism 4 includes a hot cutting frame 41, a heat sealing knife 42, a hot cutting motor 43, a synchronization rod 44, a control rod 45, and a driving rod 46. The two ends of the two heat sealing knives 42 are slidably connected to the hot cutting frame 41, the synchronization rod 44 is rotatably connected to the hot cutting frame 41, and the two driving rods 46 are fixedly connected to the ends of the synchronization rod 44. The driving rod 46 is perpendicular to the synchronization rod 44. The control rod 45 includes a first control rod 45 and a second control rod 45. The two ends of the first control rod 45 are respectively connected to the heat sealing knife 42 located below and the upper end of the driving rod 46. The two ends of the second control rod 45 are respectively connected to the end of the heat sealing knife 42 located above and the lower end of the driving rod 46. The driving motor 341 drives the synchronization rod 44 to rotate. The hot cutting motor 43 drives the synchronous rod 44 to rotate, and the rotation of the synchronous rod 44 drives the driving rods 46 at both ends to rotate. Since the upper heat sealing knife 42 is rotatably connected to the lower end of the driving rod 46 through the second control rod 45, the lower heat sealing knife 42 is rotatably connected to the upper end of the driving rod 46 through the first control rod 45, and the driving rods 46 at both ends are arranged in parallel, when the synchronous rod 44 rotates, the upper heat sealing knife 42 and the lower heat sealing knife 42 can be moved closer to or farther away from each other.

[0040] like Fig.10 As shown, the frame 1 is also provided with a centering mechanism 5, which includes a centering motor 51, a centering screw 52, ​​a guide rod 53 and a centering piece 54. The centering screw 52 and the guide rod 53 are rotatably connected to the frame 1, the centering motor 51 is connected to the end of the centering screw 52, ​​and the lower end of the centering piece 54 is threadedly connected to the centering screw 52 and rotatably connected to the guide rod 53. The setting of the centering mechanism 5 can make the cotton strip 6 be located in the middle of the packaging plastic 7, and avoid the deviation of the position of the cotton strip 6 so that one end of the cotton strip 6 cannot be packaged without elongation of the plastic. Therefore, the centering motor 51 will drive the centering screw 52 to rotate. Since the two ends of the centering screw 52 are provided with opposite threads, when the centering screw 52 rotates, the centering pieces 54 at the two ends can approach and move away from each other, so that the cotton strip 6 is located in the middle position.

[0041] The working principle of a device for automatically bagging and sealing slivers 6 is as follows: after the slivers 6 are conveyed to the frame 1, the pushing cylinder will push the slivers 6 forward. At this time, there is an unfolded packaging plastic 7 on the frame 1. During the pushing process, the slivers 6 will be wrapped by the packaging plastic 7 and then pushed onto the conveyor belt 21 at the feeding end of the thermoforming machine 2. Then, the hot cutting mechanism 4 will cut off the packaging plastic 7. At this time, one side of the packaging plastic 7 belt is connected, and the side close to the slivers 6 is cut off and packaged. Then, the descending cylinder 31 of the shrinking mechanism 3 will drive the shrinking frame 32 to descend to the end of the sliver 6, and the shrinking drive member 34 will drive the two hot The plastic knives 33 approach each other, causing the packaging plastic 7 extending from the two ends of the tampon 6 to shrink, and then the two ends of the tampon 6 are shrunk. At this time, the packaging plastic 7 wrapped by the tampon 6 is in a loose state, and the conveyor belt 21 conveys the bagged tampon 6 to the thermoplastic machine 2, causing the packaging plastic 7 to shrink further. At this time, the tampon 6 is completely wrapped by the packaging plastic 7. The shrinking mechanism 3 in the present invention can realize the radial shrinkage of the excess plastic at the two ends of the tampon 6 first, avoiding the axial shrinkage of the plastic directly in the thermoplastic machine 2 and failing to wrap the two ends of the tampon 6. The present invention can achieve the effect of automatic bagging and packaging of the tampon 6.

Claims

1. A sliver automatic bagging and sealing device, characterized in that: The invention comprises a frame (1), a heat sealing device arranged on the frame (1), and a thermoplastic machine (2), wherein a conveyor belt (21) is arranged inside the thermoplastic machine (2), the heat sealing device comprises a heat cutting mechanism (4) and a shrinking mechanism (3), the shrinking mechanism (3) comprises a descending cylinder (31), a shrinking frame (32), a thermoplastic knife (33) arranged on the shrinking frame (32), and a shrinking driving member (34) for driving the thermoplastic knife (33) to move toward and away from each other, and the descending cylinder (31) is arranged vertically on the frame (1). The retracting frame (32) is arranged at the piston end of the descending cylinder (31), two retracting frames (32) are arranged on both sides of the conveyor belt (21), one end of the retracting frame (32) is oppositely provided with two thermoplastic knives (33), and the retracting driving member (34) drives the two thermoplastic knives (33) to move closer to or away from each other; the retracting driving member (34) comprises a driving motor (341) fixedly connected to the retracting frame (32), a cone cam (341) connected to the output end of the driving motor (341), and a 342), a swing rod (343) rotatably connected to the shrinkage frame (32), a spring (345) connected between the two swing rods (343), one end of the swing rod (343) close to the cone cam (342) contacts the cone cam (342), the thermoplastic knife (33) is fixedly arranged at one end of the swing rod (343) away from the cone cam (342), and the spring (345) is connected to one side of the swing rod (343) close to the cone cam (342); from one end to The length of the protruding portion of the cone cam (342) at the other end gradually decreases; a rotating rod (3411) is provided on the contraction frame (32); the cone cam (342) is slidably connected to the rotating rod (3411); the driving motor (341) drives the rotating rod (3411) to drive the cone cam (342) to rotate; an adjusting member (35) is provided on the cone cam (342); the adjusting member (35) controls the cone cam (342) to slide along the rotating rod (3411).

2. The automatic sliver bagging and sealing device according to claim 1, characterized in that: The adjusting member (35) comprises a groove (351), a clamping column (352), a threaded rod (353), and a hand wheel (354); the groove (351) is coaxially fixedly connected to the end of the cone cam (342) and slidably connected to the rotating rod (3411); a threaded hole is provided on the contraction frame (32); the threaded rod (353) is threadedly connected in the threaded hole; the clamping column (352) is radially fixedly arranged at the end of the threaded hole; the clamping column (352) is movably clamped in the groove (351); and a hand wheel (354) is arranged at the end of the threaded rod (353).

3. The automatic sliver bagging and sealing device according to claim 1, characterized in that: The hot cutting mechanism (4) comprises a hot cutting frame (41), a heat sealing knife (42), a hot cutting motor (43), a synchronization rod (44), a control rod (45), and a driving rod (46); the two ends of the two heat sealing knives (42) are slidably connected to the hot cutting frame (41); the synchronization rod (44) is rotatably connected to the hot cutting frame (41); the two driving rods (46) are fixedly connected to the ends of the synchronization rods (44); the driving rods (46) are perpendicular to the synchronization rods (44); the control rod (45) comprises a first control rod and a second control rod; the two ends of the first control rod are respectively connected to the end of the heat sealing knife (42) located below and the upper end of the driving rod (46); the two ends of the second control rod are respectively connected to the end of the heat sealing knife (42) located above and the lower end of the driving rod (46); and the driving motor (341) drives the synchronization rod (44) to rotate.

4. The automatic sliver bagging and sealing device according to claim 1, characterized in that: The frame (1) is also provided with a centering mechanism (5), the centering mechanism (5) comprising a centering motor (51), a centering screw rod (52), a guide rod (53) and a centering plate (54), the centering screw rod (52) and the guide rod (53) being rotatably connected to the frame (1), the centering motor (51) being connected to the end of the centering screw rod (52), the lower end of the centering plate (54) being threadedly connected to the centering screw rod (52) and being rotatably connected to the guide rod (53).

5. The automatic sliver bagging and sealing device according to claim 1, characterized in that: One end of the swing rod (343) that contacts the cone cam (342) is rotatably connected to a rotating wheel (3431).

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