CN211441390U

CN211441390U - Ultrasonic mesh bag cutting and welding machine

Info

Publication number: CN211441390U
Application number: CN201922448004.7U
Authority: CN
Inventors: 岑帆
Original assignee: Ruian Chaoyang New Material Technology Co ltd
Current assignee: Ruian Chaoyang New Material Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-08
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to the technical field of mesh bag automatic production, in particular to an ultrasonic mesh bag cutting and welding machine, which comprises a frame, an unreeling traction device, a folding device, a first guide roller, an ultrasonic welding device, a rear traction device and a cutting device; the unwinding traction device, the folding device, the first guide roller, the ultrasonic welding device, the rear traction device and the slitting device are sequentially arranged on the rack according to the bag feeding direction; the mesh bag welding is realized through the ultrasonic welding device, the welding speed is high, and the welding quality is good; the utility model provides an ultrasonic wave pocket cuts welding machine, area is little, simple structure, and degree of automation is high, easy operation, and line production is smooth and easy, and the operation is stable, and the product percent of pass is high.

Description

Ultrasonic mesh bag cutting and welding machine

Technical Field

The utility model relates to a pocket automated production technical field, more specifically, relate to an ultrasonic wave pocket cuts welding machine.

Background

In the preparation process of the existing mesh bag, sewing or welding is mostly carried out after cutting, and the side edge and the bottom edge of the mesh bag need to be respectively sewn or welded, so that the production process is complicated, the production efficiency is low, the occupied area of equipment is large, the production process sometimes needs to be finished by manpower, and the automation degree is low; the existing mesh bag interface usually needs manual sewing or welding, is difficult to operate, has uneven quality, wastes time and labor.

Disclosure of Invention

An object of the utility model is to provide an ultrasonic wave pocket cuts welding machine realizes full-automatic fifty percent discount, welding, the production of cutting of pocket.

In order to achieve the above purpose, the utility model provides a technical scheme does:

an ultrasonic mesh bag cutting and welding machine comprises a machine frame, an unreeling traction device, a folding device, a first guide roller, an ultrasonic welding device, a rear traction device and a cutting device; the unwinding traction device, the folding device, the first guide roller, the ultrasonic welding device, the rear traction device and the slitting device are sequentially arranged on the rack according to the bag feeding direction; the frame comprises a transverse frame and a longitudinal frame, the transverse frame and the longitudinal frame are vertically arranged to form an L shape, the unreeling traction device is installed on the transverse frame, the transverse frame is provided with a material roll, and the folding device, the first guide roll, the ultrasonic welding device, the rear traction device and the cutting device are installed on the longitudinal frame; the unwinding traction device is used for drawing the mesh bags in the material roll to be sent to the folding device; the folding device is used for folding the mesh bag along the central line to obtain a double-layer mesh bag; the first guide roller is used for guiding the mesh bag to the ultrasonic welding device and is matched with the rear traction device to tension the mesh bag; the ultrasonic welding device is used for welding the double-layer mesh bag; the cutting device is used for cutting the welding part of the double-layer mesh bag along the direction vertical to the bag feeding direction.

Furthermore, the unreeling traction device comprises a first driving roller, a first driven roller, a first locking hand wheel, a first locking screw rod, a first adjusting mounting plate and a first fixing frame, wherein the first fixing frames are symmetrically arranged on the rack, the first locking screw rod is inserted into the upper end face of the first fixing frame and extends into the first fixing frame, the first locking hand wheel is mounted at the top of the first locking screw rod, the first adjusting mounting plate is mounted at the bottom of the first locking screw rod, two side edges of the first adjusting mounting plate are slidably connected with the first fixing frame, the first driven roller is rotatably connected between the first adjusting mounting plates, the first driving roller is correspondingly arranged below the first driven roller, and the first driving roller is rotatably connected to the first fixing frame; the first driving roller is driven by a chain through a main engine motor.

Furthermore, the folding device comprises a forming plate and a telescopic rod, the forming plate is arranged to be of an isosceles triangle structure, the bottom edge of the forming plate is hinged to a rotating rod arranged on the frame, and the top angle of the forming plate is hinged to the telescopic rod arranged on the frame.

Further, the forming plate vertex angle is towards first deflector roll, the forming plate base is close to horizontal frame.

Further, ultrasonic bonding device includes ultrasonic bonding head, cylinder, chopping block and second mount, and the cylinder setting is at second mount up end, and inside the cylinder piston rod extended to the second mount, piston rod bottom fixedly connected with chopping block, the chopping block below correspondence was provided with ultrasonic bonding head.

Further, the ultrasonic welding heads are arranged in plurality side by side.

Furthermore, the rear traction device comprises a second driving roller, a second driven roller, a second locking hand wheel, a second locking screw rod, a second adjusting mounting plate and a third fixing frame, the third fixing frame is symmetrically arranged on the rack, the second locking screw rod is inserted into the upper end face of the third fixing frame and extends into the third fixing frame, the second locking hand wheel is installed at the top of the second locking screw rod, the second adjusting mounting plate is installed at the bottom of the second locking screw rod, two side edges of the second adjusting mounting plate are connected with the third fixing frame in a sliding mode, the second adjusting mounting plate is rotatably connected with the second driven roller, the second driving roller is correspondingly arranged below the second driven roller, the second driving roller is rotatably connected onto the third fixing frame, and the second driving roller is driven by a host motor through a chain.

Furthermore, the slitting device comprises a third driving roller, a third driven roller, a third locking hand wheel, a third locking screw rod, a third adjusting mounting plate, a fourth fixing frame and a cutter, wherein the fourth fixing frames are symmetrically arranged on the rack, the third locking screw rod is inserted into the upper end face of the fourth fixing frame and extends into the fourth fixing frame, the third locking hand wheel is mounted at the top of the third locking screw rod, the third adjusting mounting plate is mounted at the bottom of the third locking screw rod, two side edges of the third adjusting mounting plate are slidably connected with the fourth fixing frame, the third driving roller is rotatably connected between the third adjusting mounting plates, the third driven roller is correspondingly arranged below the third driving roller, and the third driven roller is rotatably connected to the fourth fixing frame; and a cutter is arranged on the third driving roller, and the third driving roller is driven by a servo motor.

Further, a guide sheet and a second guide roller are arranged between the first guide roller and the ultrasonic welding device; the guide sheet is used for guiding the double-layer mesh bag to be parallel to the mesh bag conveying direction.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

the utility model provides an ultrasonic mesh bag cutting and welding machine, which realizes the feeding of a production line through an unreeling traction device; the mesh bag is folded through the forming plate, and the reversing of the whole production line is realized; the tensioning and stable transmission of the mesh bag on the longitudinal frame are realized through the first guide roller and the rear traction device; the unwinding traction device and the driving roller of the rear traction device are driven and braked by a chain of a main machine motor, so that the stable conveying speed of the transverse frame and the longitudinal frame mesh bag is ensured; the slitting device is provided with a cutter on a driving wheel to realize the slitting of the mesh bag, and the driving wheel of the slitting device is driven by a single servo motor to realize the control of slitting of different specifications of the mesh bag; the unreeling traction device, the rear traction device and the slitting device are provided with locking hand wheels to realize the control of the distance between the upper roller and the lower roller; the correct transmission of the mesh bag is realized through the guide sheet, and the normal operation of the subsequent process is ensured; the mesh bag welding is realized through the ultrasonic welding device, the welding speed is high, and the welding quality is good; the utility model provides an ultrasonic wave pocket cuts welding machine, area is little, simple structure, and degree of automation is high, easy operation, and line production is smooth and easy, and the operation is stable, and the product percent of pass is high.

Drawings

Fig. 1 is the utility model provides a pair of ultrasonic mesh bag cutting and welding machine top view.

Fig. 2 is the utility model provides a pair of ultrasonic mesh bag cutting welder owner's view.

Fig. 3 is a left side view of the longitudinal frame with the transverse frame removed.

Fig. 4 is a schematic view of a guide plate.

In the figure: 1 is a frame, 11 is a transverse frame, 12 is a longitudinal frame, 13 is a main machine motor, 14 is a rotating shaft, 15 is a first bevel gear, 16 is a second bevel gear, 17 is a first chain wheel, 18 is a second chain wheel, 19 is a third chain wheel, 2 is an unreeling traction device, 21 is a first driving roller, 22 is a first driven roller, 23 is a first locking hand wheel, 24 is a first locking screw rod, 25 is a first adjusting mounting plate, 26 is a first fixing frame, 3 is a folding device, 31 is a forming plate, 32 is a telescopic rod, 33 is a rotating rod, 4 is a first guide roller, 5 is an ultrasonic welding device, 51 is an ultrasonic welding head, 52 is an air cylinder, 53 is a chopping block, 54 is a second fixing frame, 6 is a rear traction device, 61 is a second driving roller, 62 is a second driven roller, 63 is a second locking hand wheel, 64 is a second locking screw rod, 65 is a second adjusting mounting plate, 66 is a third fixing frame, 7 is a slitting device, 71 is a third driving roller, 72 is a third driven roller, 73 is a third locking hand wheel, 74 is a third locking screw rod, 75 is a third adjusting mounting plate, 76 is a fourth fixing frame, 77 is a cutter, 78 is a servo motor, 8 is a material roll, 9 is a guide sheet, 91 is a guide end, 92 is an adjusting end, 93 is an adjusting groove, 94 is a bolt, 95 is a transition end, and 10 is a second guide roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, an ultrasonic mesh bag cutting and welding machine comprises a frame 1, an unreeling traction device 2, a folding device 3, a first guide roller 4, an ultrasonic welding device 5, a rear traction device 6 and a cutting device 7; the unreeling traction device 2, the folding device 3, the first guide roller 4, the ultrasonic welding device 5, the rear traction device 6 and the slitting device 7 are sequentially arranged on the frame 1 according to the bag feeding direction; the frame 1 comprises a transverse frame 11 and a longitudinal frame 12, the transverse frame 11 and the longitudinal frame 12 are vertically arranged to form an L shape, the unreeling traction device 2 is installed on the transverse frame 11, the transverse frame 11 is provided with a material roll 8, and the folding device 3, the first guide roll 4, the ultrasonic welding device 5, the rear traction device 6 and the cutting device 7 are installed on the longitudinal frame 12; the unreeling traction device 2 is used for dragging the mesh bags in the material roll 8 to be sent into the folding device 3; the folding device 3 is used for folding the mesh bag along the central line to obtain a double-layer mesh bag; the first guide roller 4 is used for guiding the mesh bag to the ultrasonic welding device 5 and is matched with the rear traction device 6 to tension the mesh bag so as to facilitate the welding of the ultrasonic welding device 5; the ultrasonic welding device 5 is used for welding the double-layer mesh bag; the cutting device 7 is used for cutting the welding part of the double-layer mesh bag along the direction vertical to the bag feeding direction.

In this embodiment, the unwinding traction device 2 includes a first driving roller 21, a first driven roller 22, a first locking hand wheel 23, a first locking screw 24, a first adjusting mounting plate 25 and a first fixing frame 26, the first fixing frame 26 is symmetrically arranged on the frame 1, the first locking screw 24 is inserted into the upper end surface of the first fixing frame 26 and extends into the first fixing frame 26, the first locking hand wheel 23 is installed at the top of the first locking screw 24, the first adjusting mounting plate 25 is installed at the bottom of the first locking screw 24, two side edges of the first adjusting mounting plate 25 are slidably connected with the first fixing frame 26, the first driven roller 22 is rotatably connected between the first adjusting mounting plates 25, so that the first driven roller 22 is rotatably connected between the first fixing frames 26 which are symmetrically arranged, and the up-and-down movement of the first driven roller 22 can be realized to adjust the distance between the first driving roller 21; a first driving roller 21 is correspondingly arranged below the first driven roller 22, and the first driving roller 21 is rotationally connected between first fixing frames 26 which are symmetrically arranged; the first drive roller 21 is driven by the chain drive of the main machine motor 13.

In the present embodiment, the folding device 3 includes a forming plate 31 and a telescopic rod 32, the forming plate 31 is configured as an isosceles triangle, the bottom side of the forming plate 31 is hinged to a rotating rod 33 disposed on the frame 1, the rotating rod 33 is close to the transverse frame 11, the top corner of the forming plate 31 is hinged to the telescopic rod 32 disposed on the frame 1, and the inclination of the folding device is adjusted by the telescopic rod 32. The top corner of the forming plate 31 faces the first guide roller 4, and the bottom edge of the forming plate 31 is close to the transverse frame 11.

In this embodiment, the ultrasonic welding device 5 includes an ultrasonic welding head 51, a cylinder 52, a cutting board 53 and a second fixing frame 54, the cylinder 52 is disposed on the upper end surface of the second fixing frame 54, a piston rod of the cylinder 52 extends into the second fixing frame 54, the cutting board 53 is fixedly connected to the bottom of the piston rod, and the ultrasonic welding head 51 is correspondingly disposed below the cutting board 53. The ultrasonic bonding head 51 is provided in plurality side by side. The length of the chopping board 53 is larger than the folded width of the mesh bag, and the ultrasonic welding head 51 adopts a point shape or a belt shape. When the ultrasonic wave that ultrasonic bonding head 51 produced acts on the pocket contact surface, can produce the high-frequency vibration of tens of thousands of times per second, this kind of high-frequency vibration that reaches certain amplitude to can produce local high temperature, again because the pocket heat conductivity is poor, still can not distribute in time for a while, the gathering is in the welding zone, causes double-deck pocket contact surface to melt rapidly, adds certain pressure after, makes it fuse into an organic whole.

In this embodiment, the rear traction device 6 includes a second driving roller 61, a second driven roller 62, a second locking hand wheel 63, a second locking screw 64, a second adjusting mounting plate 65 and a third fixing frame 66, the third fixing frame 66 is symmetrically arranged on the frame 1, the second locking screw 64 is inserted into the upper end surface of the third fixing frame 66 and extends into the third fixing frame 66, the second locking hand wheel 63 is installed at the top of the second locking screw 64, the second adjusting mounting plate 65 is installed at the bottom of the second locking screw 64, two side edges of the second adjusting mounting plate 65 are slidably connected with the third fixing frame 66, the second driven roller 62 is rotatably connected between the second adjusting mounting plates 65, so that the second driven roller 62 is rotatably connected between the third fixing frames 66 which are symmetrically arranged, and the up-and-down movement of the second driven roller 62 can be realized to adjust the distance between the second driving roller 61; a second driving roller 61 is correspondingly arranged below the second driven roller 62, the second driving roller 61 is rotatably connected between third fixing frames 66 which are symmetrically arranged, and the second driving roller 61 drives a chain to transmit through a host motor 13.

In this embodiment, the slitting device 7 includes a third driving roller 71, a third driven roller 72, a third locking handwheel 73, a third locking screw 74, a third adjusting mounting plate 75, a fourth fixing frame 76 and a cutter 77, wherein the fourth fixing frame 76 is symmetrically arranged on the frame 1, the third locking screw 74 is inserted into the upper end surface of the fourth fixing frame 76 and extends into the fourth fixing frame 76, the third locking handwheel 73 is installed at the top of the third locking screw 74, the third adjusting mounting plate 75 is installed at the bottom of the third locking screw 74, two side edges of the third adjusting mounting plate 75 are slidably connected with the fourth fixing frame 76, the third driving roller 71 is rotatably connected between the third adjusting mounting plate 75, so that the third driving roller 71 is rotatably connected between the symmetrically arranged fourth fixing frames 76, and the third driving roller 71 can move up and down to adjust the distance between the third driving roller 71 and the third driven roller 72; a third driven roller 72 is correspondingly arranged below the third driving roller 71, and the third driven roller 72 is rotationally connected and symmetrically arranged between the fourth fixing frames 76; the third driving roller 71 is provided with a cutter 77, the length of the cutter is larger than the width of the doubled-up double-layer mesh bag, and the third driving roller 71 is driven by a servo motor 78.

In the embodiment, a guide sheet 9 and a second guide roller 10 are arranged between the first guide roller 4 and the ultrasonic welding device 5; the guide sheet 9 is used for guiding the double-layer mesh bag to be parallel to the mesh bag conveying direction. The upper end surfaces of the first guide roller 4, the second guide roller 10, the second driving roller 61 and the third driven roller 72 are on the same horizontal plane, and the horizontal plane is a mesh bag conveying horizontal plane; the upper end surface of the ultrasonic welding head 51 is slightly lower than the conveying level of the mesh bag.

As shown in fig. 4, the pilot sheet 9 includes a pilot end 91 and an adjusting end 92, the pilot end 91 is parallel to the conveying direction of the mesh bag, the adjusting end 92 is provided with an adjusting groove 93, the pilot sheet 9 is fixed on the longitudinal frame 12 by a bolt 94 penetrating through the adjusting groove 93, and the nut diameter of the bolt 94 is larger than the width of the adjusting groove; a transition end 95 is provided between the pilot end 91 and the regulation end 92.

In the embodiment, a motor shaft of the main motor 13 rotates through a chain transmission rotating shaft 14, the rotating shaft 14 is arranged on the longitudinal rack 12, one end of the rotating shaft 14, which is close to the transverse rack, is provided with a first bevel gear 15, the first bevel gear 15 transmits power to a second gear 16 meshed with the first bevel gear, the second gear 16 transmits power to a first chain wheel 17 through a chain, and the first chain wheel 17 transmits power to a first driving roller 21 through a chain; the first driving roller 21 is perpendicular to the rotating shaft 14; the other end of the rotating shaft drives the second chain wheel 18 to rotate through a chain, the second chain wheel 18 drives the third chain wheel 19 to rotate through the chain, and the third chain wheel 19 drives the second driving roller 61 to rotate through the chain.

The utility model provides an ultrasonic mesh bag cutting and welding machine when operation, at first through unreeling draw gear 2 through the mesh bag traction in the material book 8 and send into rigging 3, the mesh bag passes through from the shaping board 31 base, adjust telescopic link 32, make the shaping board use bull stick 33 as the pin joint and change to the suitable angle of slope, the mesh bag is folded along two waist limits of shaping board 31 after the fifty percent discount, through the first deflector roll 4 folding into double-deck mesh bag, double-deck mesh bag is drawn through back draw gear 6, pass through guide positive piece 9 in proper order, second deflector roll 10 and ultrasonic welding device 5, when passing through ultrasonic welding device, chopping block 53 realizes upper and lower intermittent motion through cylinder 52, when chopping block 53 moves down to mesh bag conveying level, host machine motor 13 stops working, the mesh bag stops conveying, ultrasonic welding joint 51 produces the ultrasonic wave and welds double-deck mesh bag, the welding is accomplished, chopping block 53 moves up, ultrasonic welding joint 51 stops working, the mesh bag conveying is recovered, and when the welding area is conveyed to the cutting device, the cutter cuts the mesh bag along the central line of the welding area, so that the welding and cutting of the two side edges of the mesh bag are realized.

In the present embodiment, the main motor 13, the servo motor 78, and the air cylinder 53 are controlled by PLC control.

The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.

Claims

1. The utility model provides an ultrasonic wave pocket cuts welding machine which characterized in that: the device comprises a rack (1), an unreeling traction device (2), a folding device (3), a first guide roller (4), an ultrasonic welding device (5), a rear traction device (6) and a slitting device (7); the unreeling traction device (2), the folding device (3), the first guide roller (4), the ultrasonic welding device (5), the rear traction device (6) and the slitting device (7) are sequentially arranged on the rack (1) according to the bag feeding direction; the frame (1) comprises a transverse frame (11) and a longitudinal frame (12), the transverse frame (11) and the longitudinal frame (12) are vertically arranged to form an L shape, the unreeling traction device (2) is installed on the transverse frame (11), a material roll (8) is arranged on the transverse frame (11), and the folding device (3), the first guide roller (4), the ultrasonic welding device (5), the rear traction device (6) and the cutting device (7) are installed on the longitudinal frame (12); the unreeling traction device (2) is used for dragging the mesh bags in the material roll (8) to be sent into the folding device (3); the folding device (3) is used for folding the mesh bag along the central line to obtain a double-layer mesh bag; the first guide roller (4) is used for guiding the mesh bag to the ultrasonic welding device (5) and is matched with the rear traction device (6) to tension the mesh bag; the ultrasonic welding device (5) is used for welding the double-layer mesh bag; the cutting device (7) is used for cutting the welding part of the double-layer mesh bag along the direction vertical to the bag feeding direction.

2. The ultrasonic mesh bag cutting and welding machine according to claim 1, characterized in that: the unreeling traction device (2) comprises a first driving roller (21), a first driven roller (22), a first locking hand wheel (23), a first locking screw rod (24), a first adjusting mounting plate (25) and a first fixing frame (26), wherein the first fixing frame (26) is symmetrically arranged on the rack (1), the first locking screw rod (24) is inserted into the upper end face of the first fixing frame (26) and extends into the first fixing frame (26), the first locking hand wheel (23) is mounted at the top of the first locking screw rod (24), the first adjusting mounting plate (25) is mounted at the bottom of the first locking screw rod (24), two side edges of the first adjusting mounting plate (25) are connected with the first fixing frame (26) in a sliding manner, the first driven roller (22) is rotatably connected between the first adjusting mounting plates (25), the first driving roller (21) is correspondingly arranged below the first driven roller (22), the first driving roller (21) is rotationally connected to the first fixing frame (26); the first driving roller (21) drives a chain to transmit through a main engine motor (13).

3. The ultrasonic mesh bag cutting and welding machine according to claim 1, characterized in that: fifty percent discount device (3) are including forming plate (31) and telescopic link (32), forming plate (31) set up to the isosceles triangle structure, and forming plate (31) base is articulated with bull stick (33) of setting on frame (1) and is connected, and forming plate (31) apex angle is articulated with telescopic link (32) of setting on frame (1) and is connected.

4. The ultrasonic mesh bag cutting and welding machine according to claim 3, characterized in that: the apex angle of the forming plate (31) faces to the first guide roller (4), and the bottom edge of the forming plate (31) is close to the transverse rack (11).

5. The ultrasonic mesh bag cutting and welding machine according to claim 1, characterized in that: the ultrasonic welding device (5) comprises an ultrasonic welding head (51), an air cylinder (52), a cutting board (53) and a second fixing frame (54), wherein the air cylinder (52) is arranged on the upper end face of the second fixing frame (54), a piston rod of the air cylinder (52) extends into the second fixing frame (54), the bottom of the piston rod is fixedly connected with the cutting board (53), and the ultrasonic welding head (51) is correspondingly arranged below the cutting board (53).

6. The ultrasonic mesh bag cutting and welding machine according to claim 5, characterized in that: the ultrasonic welding heads (51) are arranged in parallel.

7. The ultrasonic mesh bag cutting and welding machine according to claim 1, characterized in that: the rear traction device (6) comprises a second driving roller (61), a second driven roller (62), a second locking hand wheel (63), a second locking screw rod (64), a second adjusting mounting plate (65) and a third fixing frame (66), the third fixing frame (66) is symmetrically arranged on the rack (1), the second locking screw rod (64) is inserted into the upper end face of the third fixing frame (66) and extends into the third fixing frame (66), the second locking hand wheel (63) is mounted at the top of the second locking screw rod (64), the second adjusting mounting plate (65) is mounted at the bottom of the second locking screw rod (64), two side edges of the second adjusting mounting plate (65) are slidably connected with the third fixing frame (66), the second driven roller (62) is rotatably connected between the second adjusting mounting plates (65), the second driving roller (61) is correspondingly arranged below the second driven roller (62), the second driving roller (61) is rotatably connected to the third fixing frame (66), and the second driving roller (61) drives the chain to transmit through the host motor (13).

8. The ultrasonic mesh bag cutting and welding machine according to claim 1, characterized in that: the slitting device (7) comprises a third driving roller (71), a third driven roller (72), a third locking hand wheel (73), a third locking screw rod (74), a third adjusting mounting plate (75), a fourth fixing frame (76) and a cutter (77), wherein the fourth fixing frame (76) is symmetrically arranged on the rack (1), the third locking screw rod (74) is inserted into the upper end surface of the fourth fixing frame (76) and extends into the fourth fixing frame (76), the third locking hand wheel (73) is installed at the top of the third locking screw rod (74), the third adjusting mounting plate (75) is installed at the bottom of the third locking screw rod (74), two side edges of the third adjusting mounting plate (75) are slidably connected with the fourth fixing frame (76), the third driving roller (71) is rotatably connected between the third adjusting mounting plates (75), the third driven roller (72) is correspondingly arranged below the third driving roller (71), the third driven roller (72) is rotationally connected to a fourth fixed frame (76); the third driving roller (71) is provided with a cutter (77), and the third driving roller (71) is driven by a servo motor (78).

9. The ultrasonic mesh bag cutting and welding machine according to claim 1, characterized in that: a guide sheet (9) and a second guide roller (10) are arranged between the first guide roller (4) and the ultrasonic welding device (5); the guide sheet (9) is used for guiding the double-layer mesh bag to be parallel to the mesh bag conveying direction.