CN116986069A - Plastic bag bagging machine - Google Patents

Abstract

A plastic bag bagging machine, comprising: a product arrangement and stacking device for stacking a row of bundled plastic bags output by the bag making machine on the front end of the platen; the product conveying device is used for conveying the stacked plastic bags to the upper surface of the packaging bag; a package bag supporting device for supporting the package bag; the product arranging and stacking device and the packaging bag supporting device are respectively arranged at the front end and the rear end of the bedplate; the bedplate is mounted on the bracket. The invention has the advantages that: the automatic bag making machine can be in butt joint with the output end of the bag making machine to sequentially and automatically arrange, stack, convey, check in the middle and pack products, an automatic production flow is formed, and the production efficiency is greatly improved.

Description

Plastic bag bagging machine

Technical Field

The invention relates to a plastic bag bagging machine which is mainly used for piling up a bundle of bundled plastic bags into a row and sequentially filling the bags into a packaging bag.

Background

In the production process of plastic bags, a bag making machine folds and bundles a stack of plastic bags, sequentially outputs a bundle of plastic bags, and then loads the bundle of plastic bags into a packaging bag (generally a woven bag) by a person. The automatic production process can not be formed by butt joint with the output end of the bag making machine, and the production efficiency is low.

Disclosure of Invention

The present invention provides a plastic bag filling machine to solve the above-mentioned problems of the prior art.

The technical scheme of the invention is as follows: a plastic bag bagging machine, comprising: a product arrangement and stacking device for stacking a row of bundled plastic bags output by the bag making machine on the front end of the platen; the product conveying device is used for conveying the stacked plastic bags to the upper surface of the packaging bag; a package bag supporting device for supporting the package bag; the product arranging and stacking device and the packaging bag supporting device are respectively arranged at the front end and the rear end of the bedplate; the bedplate is mounted on the bracket.

The invention has the advantages that: the automatic bag making machine can be in butt joint with the output end of the bag making machine to sequentially and automatically arrange, stack, convey, check in the middle and pack products, an automatic production flow is formed, and the production efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of the overall side structure (cross-section at platen) of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a top view of the ground track of FIG. 2;

FIG. 4 is a left side view of the movable clamp plate or a right side view of the fixed clamp plate of FIG. 1;

FIG. 5 is a left side view of the lower portion of FIG. 1;

FIG. 6 is a schematic structural view of first to third toggle levers and driving devices thereof according to the present invention;

FIG. 7 is a schematic view of the structure of the material blocking rod and the driving device thereof;

FIG. 8 is a schematic view showing a perspective structure of a lower portion of the packing bag supporting apparatus of the present invention;

FIG. 9 is a schematic view of the structure of the synchronization connection board of FIG. 8;

FIGS. 10-19 are schematic views of the operation of the present invention;

FIG. 20 is a schematic view showing a combined three-dimensional structure of the bag supporting apparatus and the ground rail of the present invention;

FIG. 21 is a schematic top view of the alternate bagging of the present invention on both transverse and longitudinal ground tracks using two bag support devices;

FIG. 22 is a schematic view of the structure of the present invention with a bag gripping device mounted on both sides of a bag support device; FIG. 23 is a schematic view of the structure of the present invention with a means for preventing product from falling out (push-pull plate embodiment) above the package support means;

FIG. 24 is a right side view of the device for preventing product spillage of FIG. 23 (push-pull plate embodiment);

fig. 25 is a schematic view of the structure of another embodiment of the device for preventing product scattering (flap assembly) of the present invention;

fig. 26 is a schematic view showing an operation state of the device (flap assembly) for preventing the product from scattering in fig. 25;

FIG. 27 is a schematic view of a robot driven by a long-range lift mechanism according to the present invention;

FIG. 28 is a view showing the structure of the present invention in which the follower pallet is incorporated in the bag holder.

Reference numerals illustrate: 1. swing arm, 2, feed fork, 201, feed fork gap, 4, swing arm driving device, 5, swing arm shaft, 6, bracket, 7, platen, 71, platen gap, 8, first material pulling rod, 9, second material pulling rod, 10, third material pulling rod, 11, material blocking rod, 12, first strip hole, 13, second strip hole, 14, material blocking rod hole, 15, manipulator track, 16, manipulator lifting device, 17, manipulator opening and closing cylinder, 18, movable clamping plate, 181, clamping plate gap, 19, fixed clamping plate, 20, clamping plate driving cylinder, 21, clamping plate, 22, package bag supporting arm, 23, pulley, 231, pulley shaft (round rod), 24, supporting bottom plate, 25, lateral distance adjusting mechanism, 251, bidirectional threaded screw, 26, lateral track, 27, longitudinal track, 28, bottom plate, 29, roller, 30, ground track, 31, longitudinal distance adjusting mechanism, 32, roller block, 33, roller passing gap, 34, packing bag, 35, driving rod front and back cylinder, 36, driving rod lifting cylinder, 37, frame, 38, driving rod connecting rod, 39, frame track, 40, synchronous connecting plate, 41, fixed hole, 42, long hole, 43, screw, 44, packing bag pushing device, 45, push-pull plate, 46, push-pull plate driving cylinder, 47, push-pull plate sliding rail, 48, turning plate, 49, turning plate frame, 491, convex plate, 50, turning plate frame driving cylinder, 51, turning plate driving cylinder, 52, follow-up supporting plate, 53, lifting nut, 54, lifting screw, A and B, two packing bag supporting devices, P (one) plastic bag.

Detailed Description

Referring to fig. 1 to 9, an embodiment of a plastic bag filling machine according to the present invention mainly comprises the following three parts:

(1) And a product arrangement and stacking device for stacking a row of bundled plastic bags P output by the bag making machine on the front end of the platen 7.

(2) And the product conveying device is used for conveying the stacked plastic bags P to the upper surface of the packaging bag.

(3) And a packing bag supporting means for supporting the packing bag 34.

The product arranging and stacking device and the packaging bag supporting device are respectively arranged at the front end and the rear end of the bedplate 7; the platen 7 (and other related components including the swing arm 1, the first to third toggle levers, the driving means of the stop lever 11, see fig. 1) is mounted on the bracket 6.

The swing arm driving device 4 adopts an air cylinder or a motor and a transmission mechanism, and any conventional technique can be adopted as long as the swing arm 1 can swing by about 90 degrees.

One embodiment of the product arraying and stacking device comprises: the oscillating arm 1, the material shifting fork 2, the oscillating arm driving device 4, the oscillating arm shaft 5, the first material shifting rod 8 and the second material shifting rod 9, and the oscillating arm driving device 4 is arranged on the oscillating arm 1 or the oscillating arm shaft 5. The swing arm driving device 4 in this embodiment adopts an air cylinder, the side surface shape of the swing arm 1 is "<", the bottom end of the swing arm 1 is hinged on a base (mounted on the bracket 6) through a swing arm shaft 5, the top of the swing arm 1 is provided with an L-shaped material stirring fork 2 facing one side of the platen 7, and two material stirring fork openings 201 corresponding to the first material stirring rod 8 are arranged on the material stirring fork 2. The upper end of the cylinder (swing arm driving means 4) is hinged on the top of the bracket 6 or under the platen 7, and the lower end is hinged on the lower part of the swing arm 1 (see fig. 1 and 5). Two parallel notches 71 are arranged at the front end of the bedplate 7, and two first strip holes 12 which are parallel to each other and correspond to the notches 71 are arranged on the bedplate 7 behind the notches 71; a first material shifting rod 8 which can stretch up and down and move back and forth is arranged below the notch 71; a second toggle lever 9 which can be extended and retracted up and down and moved forward and backward is provided below the first elongated hole 12.

Means for intermediate inspection may also be added to the platen 7 described above, including: a second long hole 13 and a material blocking rod hole 14 which are in the same straight line with the first long hole 12 are sequentially arranged behind the first long hole 12 on the platen 7, a third material stirring rod 10 and a material blocking rod 11 are respectively arranged below the second long hole 13 and the material blocking rod hole 14, the third material stirring rod 10 can stretch up and down and move back and forth, and the material blocking rod 11 can move up and down.

The driving device of the first stirring rod 8 comprises a stirring rod front-back cylinder 35, a stirring rod lifting cylinder 36, a frame 37, a stirring rod connecting rod 38 and a frame track 39, wherein two sides of the frame 37 are connected to the frame track 39 in a sliding manner, the frame track 39 is connected to the bracket 6, the stirring rod lifting cylinder 36 is arranged below the frame 37, the lower ends of the two first stirring rods 8 are connected with the stirring rod connecting rod 38, and the upper ends of the first stirring rods 8 slide through the upper edge of the frame 37; the frame 37 is connected to the piston rod of a toggle lever front and rear cylinder 35 mounted under the platen 7 or on the bracket 6 (see fig. 6). The driving devices of the second material stirring rod 9 and the third material stirring rod 10 are the same as the driving devices of the first material stirring rod 8.

The driving device of the material blocking rod 11 removes the front and rear air cylinders 35 and the frame rails 39 of the material blocking rod, and the frame 37 is fixed on the bracket 6 (see fig. 7). Other conventional techniques having the same function, such as using a motor driven by a transmission, may also be used.

The product conveying device comprises: the lifting device comprises a manipulator rail 15, a manipulator lifting device 16 and a manipulator, wherein the manipulator rail 15 is arranged above the bedplate 7, the manipulator lifting device 16 is slidably arranged on the manipulator rail 15, and a manipulator is arranged on a piston rod at the lower end of the manipulator lifting device 16. The manipulator includes: the manipulator opening and closing cylinder 17 and the manipulator clamping plate are arranged, the manipulator opening and closing cylinder 17 is transversely connected to a piston rod of the manipulator lifting device 16, and two ends of the manipulator opening and closing cylinder 17 are respectively connected with one manipulator clamping plate; the manipulator clamping plate is provided with clamping plate notches 181 corresponding to the first material shifting rod 8 and the second material shifting rod 9.

The manipulator clamping plate comprises a movable clamping plate 18 and a fixed clamping plate 19, wherein the two ends of the manipulator opening and closing cylinder 17 are respectively connected with the movable clamping plate 18 and the fixed clamping plate 19, and the movable clamping plate 18 is connected to the top end of a piston rod of the manipulator opening and closing cylinder 17.

A pressing plate 21 may be further disposed on the upper surface between the movable clamping plate 18 and the fixed clamping plate 19, a pressing plate driving cylinder 20 is disposed on one end of the upper surface of the manipulator opening and closing cylinder 17, and one end of the pressing plate 21 is connected with a piston rod of the pressing plate driving cylinder 20 (see fig. 1).

Referring to fig. 8 and 9, the packing bag supporting apparatus of the present invention basically comprises: the packaging bag supporting device comprises: the packaging bag supporting arm 22, the supporting bottom plate 24, the transverse interval adjusting mechanism 25, the transverse rail 26, the longitudinal rail 27, the bottom plate 28 and the longitudinal interval adjusting mechanism 31 are arranged on the bottom plate 28, two parallel longitudinal rails 27 are arranged on the bottom plate 28, one transverse rail 26 is arranged at one end of each longitudinal rail 27, and the other transverse rail 26 is arranged on the longitudinal rail 27 in a sliding manner; the lower ends of the four package support arms 22 are respectively connected with a support bottom plate 24, the lower sides of every two support bottom plates 24 are slidably arranged on a transverse track 26, and the four package support arms 22 are rectangular in distribution (distributed at four corners). A telescopic synchronous connecting mechanism is connected between the supporting bottom plates 24 between the two packaging bag supporting arms 22 at the same end of the two transverse rails 26, and a transverse interval adjusting mechanism 25 for adjusting the interval between the two supporting bottom plates 24 positioned on the same transverse rail 26 is arranged outside the supporting bottom plates 24; on the outside of one of the lateral rails 26 located above the longitudinal rail 27 is provided a longitudinal spacing adjustment mechanism 31 for adjusting the movement of the lateral rail 26 along the longitudinal rail 27.

The cross section of the bag supporting arm 22 is L-shaped, the top end of the bag supporting arm 22 is round (the pulley 23 in fig. 1 and 2 is removed, only the pulley shaft 231 is reserved), and the pulley 23 can be arranged on one side or two sides of the top end of the bag supporting arm 22 (as shown in fig. 1 and 2).

The synchronous connection mechanism is a synchronous connection plate 40, a fixing hole 41 and a long hole 42 are respectively arranged at two ends, close to the two ends, of the long strip-shaped synchronous connection plate 40, the fixing hole 41 at one end of the synchronous connection plate 40 is fixedly connected with one supporting bottom plate 24 through a fixing screw, and the screw 43 slides through the long hole 42 of the synchronous connection plate 40 and is connected with the other supporting bottom plate 24 (see fig. 1, 8 and 9). After the two support base plates 24 are connected with each other by the synchronous connecting plate 40, the distance can be extended and contracted, and the two support base plates can move transversely and synchronously.

The transverse spacing adjusting mechanism 25 and the longitudinal spacing adjusting mechanism 31 are driven by manual wheels or stepping motors. The lateral spacing adjusting mechanism 25 is configured to synchronously adjust the spacing between two package supporting arms 22 on the same side (lower side in fig. 2) and two package supporting arms 22 on the other side (upper side in fig. 2) by rotating a bidirectional threaded screw through a hand wheel or a servo motor (not shown), so as to support packages 34 with different widths. The longitudinal distance adjusting mechanism 31 is moved by rotating a screw through a hand wheel or a servo motor (not shown) to adjust one of the lateral rails 26 on the right side in fig. 2, thereby achieving synchronous adjustment of the distance between the left and right package support arms 22. Therefore, the support device is suitable for supporting packaging bags with different calibers, and the applicability of products is improved.

Referring to fig. 1-3, 20 and 21, four rollers 29 may be installed under the bottom plate 28, two horizontal parallel ground rails 30 and two longitudinal parallel ground rails 30 are installed on the ground, one ends of the horizontal and longitudinal ground rails 30 intersect under the package supporting device, and rim passing gaps 33 for passing rims of the rollers 29 are provided at inner corners of the two intersecting ground rails 30; roller stoppers 32 are provided at both ends of the ground rail 30; a bag support A, B (fig. 21) is provided on each pair of ground rails 30.

Referring to fig. 10 to 19, the operation of the plastic bag filling machine of the present invention is described as follows:

1. the arrangement and stacking of products:

(1) Placing a packaging bag 34 on the packaging bag supporting device (the packaging bag 34 is turned inside out and then sleeved outside the four packaging bag supports 22); the swing arm 1 swings anticlockwise by about 90 degrees to be horizontal; a product (a bundle of plastic bags P) output from the bag making machine is conveyed to a material shifting fork 2 at the top of the swing arm 1; the first material stirring rod 8 and the second material stirring rod 9 are in an extending state (the top end extends out of the bedplate 7 upwards), the first material stirring rod 8 is positioned in the notch 71, and the second material stirring rod 9 is close to the front end of the first strip hole 12. See fig. 10.

(2) The swing arm 1 swings clockwise by about 90 ° to convey the plastic bag P onto the front end of the platen 7; the first ejector pin 8 is then retracted. See fig. 11.

(3) The first toggle lever 8 moves to the front of the swing arm 1 and protrudes, see fig. 12.

(4) The first deflector rod 8 moves to the rear of the swing arm 1, pushing the plastic bag P backward to the front of the second deflector rod 9, see fig. 13.

(5) The above steps are repeated, a plurality of plastic bags P are sequentially stacked in front of the second material-pulling rod 9, and each time a plastic bag P is stacked, the second material-pulling rod 9 moves a corresponding distance along with the backward movement. See fig. 14.

(6) The plastic bags P to be stacked reach a set number, and a robot (product conveying device) moves above the stacked row of plastic bags P, see fig. 15.

(7) The manipulator moves downwards, and the first material stirring rod 8 is retracted. See fig. 16.

(8) The movable clamping plate 18 of the manipulator moves rightwards to push the plastic bag P to synchronously move rightwards, and meanwhile, the second material shifting rod 9 synchronously moves rightwards along with the plastic bag P until reaching the fixed clamping plate 19; finally, the movable clamping plate 18 and the fixed clamping plate 19 clamp the plastic bag P. See fig. 17.

2. Intermediate inspection of the product:

subsequently, after the second material shifting lever 9 and the third material shifting lever 10 in fig. 11 are retracted (not shown), the manipulator moves the clamped row of plastic bags P rightward between the third material shifting lever 10 and the material blocking lever 11, and clamps the plastic bags P; then, the operator checks the plastic bag P to see whether the products are aligned or not; if there is a problem, correction is performed. In the above-described process of carrying out the present step, the former alignment stacking device performs the stacking work of the products at the same time, see fig. 18. If the step of checking is selected to be skipped, bagging can be performed directly.

3. Bagging:

referring to fig. 19, after the intermediate inspection of the product, the operator initiates a subsequent bagging process: the stopper rod 11 is retracted, and the inspected plastic bag P is moved rightward by the robot to above the packing bag 34, and then moved downward to bring the first row of plastic bags P. The above process is repeated, and a plurality of rows of plastic bags P (the number of rows being programmed) are sequentially loaded into the package 34.

As the first row of plastic bags P is moved downward, the top ends of the bags 34 (i.e., the bottoms of the bags) are pressed downward (into the frame of four bag supports 22) a corresponding distance; when the second row of plastic bags P is filled, the bottom of the bag 34 is again moved downward a corresponding distance until the bag 34 is filled with plastic bags P.

4. Taking out the packaging bag 34:

the (product-filled) package 34 can be removed directly from the package support (the spacing of the opposing package supports 22 is first increased by the lateral spacing adjustment mechanism 25 and the longitudinal spacing adjustment mechanism 31).

Referring to fig. 20 and 21, two bag supporting means a and B may be provided on the horizontal and vertical ground rails 30, respectively. After the product conveying device fills the product in the package bag 34 on the package bag supporting device a, the package bag supporting device a is moved to the right end of the transverse ground track 30, and the package bag with the product packaged therein is manually or automatically (e.g., driven by a synchronous belt or a cylinder by a motor) moved out of the package bag supporting device a; and then the packaging bag supporting device B is moved to a working position to carry out bagging, and the process is repeated. Thus, the two packaging bag supporting devices A and B can alternately pack bags, and the working efficiency is improved.

Referring to fig. 22, a packing bag holding device 44 for holding the packing bag tightly during packing and preventing the packing bag from falling down under the gravity of the product is installed at both sides of the upper portion of the packing bag holding device. The bag gripping device 44 may be a cylinder, and a rubber head or a rubber roller may be mounted on the top end of the piston rod.

Referring to fig. 23 and 24, an embodiment of the apparatus for preventing the product from scattering when the bag is mounted above the bag supporting means comprises: the sliding plate 45, the sliding plate driving cylinder 46 and the sliding plate sliding rail 47, wherein the sliding plate 45 is slidably arranged on the sliding plate sliding rail 47 on two sides, and one side of the sliding plate 45 is connected with a piston rod of the sliding plate driving cylinder 46. The push-pull plate 45 can also be replaced by a rectangular frame or a flexible body with a cross rod in the mouth of the U-shaped body for supporting. In operation, when the robot arm delivers product above (or before) the package support, the push-pull plate 45 moves above the package support, preventing product clamped by the robot arm (due to no clamping) from falling out; when the product is moved downwards by the manipulator to be bagged, the push-pull plate 45 is withdrawn from reset.

Referring to fig. 25 and 26, another embodiment of the device for preventing scattering of a product includes: the turning plate 48, the turning plate frame 49, the turning plate frame driving cylinder 50 and the turning plate driving cylinder 51, one side of the turning plate frame 49 is hinged on the bracket 6 and is hinged with one end of the turning plate frame driving cylinder 50 through a swing arm, and the other end of the turning plate frame driving cylinder 50 is hinged with the bracket 6; a convex plate 491 is connected to the middle part of the other side of the turning plate frame 49, and one ends of two turning plate driving cylinders 51 are hinged on the convex plate 491; two opposite flaps 48 are hinged on one side of the flap frame 49, and the hinge shaft of each flap 48 is connected to the hinge shaft of one flap driving cylinder 51 through a swing arm. In operation, before the robot delivers the product to above the bag support device, the flap frame 49 is rotated 90 ° counterclockwise from the erected state shown in fig. 25 to a horizontal state (shown in fig. 26) by the flap frame driving cylinder 50; when the robot delivers the product to above the bag support, the two flaps 48 are in a horizontal position to prevent the product clamped by the robot (due to the lack of clamping) from falling out; when the mechanical arm moves down the product for bagging, the two turning plates 48 are driven by the turning plate driving air cylinder 51 to deflect downwards by 90 degrees (see fig. 26), so that the mechanical arm can convey the product to smoothly move downwards for bagging; then the manipulator moves upwards for resetting; the flap frame 49 and the flap 48 then return to the state shown in fig. 25, completing a work process.

Referring to fig. 27, the robot elevating device 16 employs a general cylinder capable of delivering a product to an upper portion of the inside of the package opening or a long-distance elevating mechanism capable of delivering a product to a bottom portion of the inside of the package opening. The long-distance lifting mechanism comprises a long cylinder (shown in fig. 27), a multi-stage cylinder, a servo motor and a transmission mechanism. With this product conveying apparatus, the supporting method of the package bag 34 on the package bag supporting apparatus is different from the above, the package bag 34 does not need to be turned inside out, the bottom thereof is provided at the bottom in the four package bag supporting arms 22, the mouth of the package bag 34 is turned outside, and the bagging process thereof is: the products are sequentially filled up from the bottom in the mouth of the packaging bag until the packaging bag is full.

Referring to fig. 28, the package support device is provided with a follow-up pallet 52 and a follow-up pallet driving device. This is an added device to the above embodiments to prevent the bag 34 from falling due to the gravity of the product during the bagging process. In operation, the follower plate 52 moves down the bottom of the bag 34 the same distance as each row of products (plastic bags P) is loaded by the robot.

Claims (21)

1. A plastic bag bagging machine, comprising:

a product arrangement and stacking device for stacking a row of bundled plastic bags (P) output by the bag making machine on the front end of the platen (7);

the product conveying device is used for conveying the stacked plastic bags (P) to the upper surface of the packaging bag;

and a bag supporting device for supporting the bag (34);

the product arranging and stacking device and the packaging bag supporting device are respectively arranged at the front end and the rear end of the bedplate (7); the bedplate (7) is arranged on the bracket (6).

2. The plastic bag filling machine according to claim 1, wherein said product arrangement stacking means comprises: the device comprises a swing arm (1), a stirring fork (2), a swing arm driving device (4), a swing arm shaft (5), a first stirring rod (8) and a second stirring rod (9), wherein the bottom end of the swing arm (1) is hinged on a bracket (6) through the swing arm shaft (5), and one side, facing a bedplate (7), of the top of the swing arm (1) is provided with an L-shaped stirring fork (2); the swing arm (1) or the swing arm shaft (5) is provided with a swing arm driving device (4); two parallel bedplate openings (71) are arranged at the front end of the bedplate (7); two first strip holes (12) corresponding to the bedplate openings (71) are arranged behind the bedplate openings; a first material shifting rod (8) which can stretch up and down and move forwards and backwards is arranged below the bedplate opening (71); a second material shifting rod (9) which can stretch up and down and move forwards and backwards is arranged below the first strip hole (12); the material shifting fork (2) is provided with a material shifting fork opening (201) which corresponds to the bedplate opening (71) and is used for passing through the first material shifting rod (8).

3. The plastic bag filling machine according to claim 2, wherein said product conveying means comprises: the device comprises a manipulator rail (15), a manipulator lifting device (16) and a manipulator, wherein the manipulator rail (15) is arranged above the bedplate (7), and the manipulator lifting device (16) is slidably arranged on the manipulator rail (15) and is driven by a driving device to reciprocate along the manipulator rail (15); a piston rod at the lower end of the manipulator lifting device (16) is provided with a manipulator.

4. A plastic bag bagging machine according to claim 3, wherein the manipulator comprises a manipulator opening and closing cylinder (17) and a manipulator clamping plate, the manipulator opening and closing cylinder (17) is transversely connected to a piston rod of the manipulator lifting device (16), and two ends of the manipulator opening and closing cylinder (17) are respectively connected with one manipulator clamping plate; the manipulator clamping plate is provided with clamping plate openings (181) corresponding to the first material stirring rod (8) and the second material stirring rod (9).

5. The plastic bag bagging machine according to claim 4, wherein the manipulator clamping plate comprises a movable clamping plate (18) and a fixed clamping plate (19), the two ends of the manipulator opening and closing cylinder (17) are respectively connected with the movable clamping plate (18) and the fixed clamping plate (19), and the movable clamping plate (18) is connected with the top end of a piston rod of the manipulator opening and closing cylinder (17).

6. The plastic bag bagging machine according to claim 5, wherein a pressing plate (21) is provided at an upper portion between the two robot jaws, a pressing plate driving cylinder (20) is provided at an upper end of the robot opening and closing cylinder (17), and one end of the pressing plate (21) is connected to a piston rod of the pressing plate driving cylinder (20).

7. The plastic bag bagging machine according to claim 2, characterized in that a second strip hole (13) and a blocking rod hole (14) which are on the same straight line with the first strip hole (12) are sequentially arranged behind the first strip hole (12) on the platen (7), a third stirring rod (10) and a blocking rod (11) are respectively arranged below the second strip hole (13) and the blocking rod hole (14), the third stirring rod (10) can stretch up and down and move back and forth, and the blocking rod (11) can move up and down.

8. The plastic bag bagging machine according to claim 7, wherein the driving device of the first stirring rod (8) comprises a stirring rod front-back cylinder (35), a stirring rod lifting cylinder (36), a frame (37), stirring rod connecting rods (38) and frame rails (39), two sides of the frame (37) are slidably connected to the frame rails (39), the frame rails (39) are connected to the bracket (6), the stirring rod lifting cylinder (36) is arranged below the frame (37), the lower ends of the two first stirring rods (8) are connected with the stirring rod connecting rods (38), and the upper ends of the first stirring rods (8) slide through the upper sides of the frame (37); the frame (37) is connected with a piston rod of a front cylinder (35) and a rear cylinder (35) of a material stirring rod which are arranged below the bedplate (7) or on the bracket (6); the driving devices of the second material stirring rod (9) and the third material stirring rod (10) are the same as the driving devices of the first material stirring rod (8); the driving device of the material blocking rod (11) removes the front and rear air cylinders (35) of the material shifting rod and the frame rail (39), and the frame (37) is fixed on the bracket (6).

9. A plastic bag filling machine according to claim 2, characterized in that the oscillating arm driving means (4) employs a combination of air cylinders or motors and transmission mechanisms.

10. The plastic bag filling machine according to claim 1, wherein said bag supporting means comprises: the packaging bag comprises a packaging bag supporting arm (22), a supporting bottom plate (24), a transverse interval adjusting mechanism (25), transverse rails (26), longitudinal rails (27), a bottom plate (28) and a longitudinal interval adjusting mechanism (31), wherein two parallel longitudinal rails (27) are arranged on the bottom plate (28), one transverse rail (26) is arranged at one end of each longitudinal rail (27), and the other transverse rail (26) is arranged above each longitudinal rail (27) in a sliding manner; the lower ends of the four packaging bag supporting arms (22) are respectively connected with a supporting bottom plate (24), the lower parts of every two supporting bottom plates (24) are slidably arranged on a transverse track (26), and the four packaging bag supporting arms (22) are in rectangular distribution; a telescopic synchronous connecting mechanism is connected between the supporting bottom plates (24) between two packaging bag supporting arms (22) at the same end of the two transverse rails (26), and a transverse spacing adjusting mechanism (25) for adjusting the spacing between the two supporting bottom plates (24) positioned on the same transverse rail (26) is arranged at the outer side of each supporting bottom plate (24); a longitudinal distance adjusting mechanism (31) for adjusting the movement of the transverse track (26) along the longitudinal track (27) is arranged on the outer side of the transverse track (26) positioned above the longitudinal track (27); the top end of the packing bag supporting arm (22) is smooth.

11. The plastic bag filling machine according to claim 10, wherein the cross section of the bag supporting arms (22) is L-shaped, one or both sides of the top end of each of the bag supporting arms (22) are provided with a pulley (23), and the pulley shaft (231) is provided at the top end of the bag supporting arm (22).

12. The plastic bag bagging machine according to claim 10, wherein the synchronous connecting mechanism is a synchronous connecting plate (40), a fixing hole (41) and a long hole (42) are respectively arranged at two ends of the long synchronous connecting plate (40) close to each other, the fixing hole (41) at one end of the synchronous connecting plate (40) is fixedly connected with one supporting bottom plate (24) through a fixing screw, and the screw (43) slides through the long hole (42) of the synchronous connecting plate (40) and is connected with the other supporting bottom plate (24); after the two support bottom plates (24) are connected with each other through the synchronous connecting plate (40), the distance can stretch out and draw back, and the two support bottom plates can transversely and synchronously move.

13. A plastic bag bagging machine according to claim 10, characterized in that under the bottom plate (28) four rollers (29) are mounted, on the ground two transversely parallel ground tracks (30) and two longitudinally parallel ground tracks (30) are mounted, one end of the transverse and longitudinal ground tracks (30) intersecting under the bag support means, rim passing gaps (33) for passing the rims of the rollers (29) being provided at the inner corners of the two intersecting ground tracks (30); roller stoppers (32) are arranged at two ends of the ground track (30); a bag support means (A, B) is provided on each pair of ground rails (30).

14. The plastic bag bagging machine of claim 10, wherein the lateral spacing adjustment mechanism (25) and the longitudinal spacing adjustment mechanism (31) are driven by manual wheels or automatically controlled by a servo motor.

15. A plastic bag filling machine according to claim 1, characterized in that the bag holding means (44) are provided on both sides of the upper part of the bag holding means for holding the bag against falling under the gravity of the product during filling.

16. A plastic bag filling machine according to claim 1, wherein means for preventing the product from scattering when filling is provided above said bag supporting means.

17. The plastic bag filling machine of claim 16, wherein said means for preventing the product from scattering comprises: the sliding device comprises a sliding plate (45), a sliding plate driving cylinder (46) and a sliding plate sliding rail (47), wherein the sliding plate (45) is slidably arranged on the sliding plate sliding rail (47) on two sides, and one side of the sliding plate (45) is connected with a piston rod of the sliding plate driving cylinder (46).

18. The plastic bag filling machine of claim 16, wherein said means for preventing the product from scattering comprises: a turning plate frame (49) is arranged beside the upper part of the packaging bag supporting arm (22), one side of the turning plate frame (49) is hinged on the bracket (6), and the turning plate frame (49) is provided with a turning plate frame driving device for driving the turning plate frame to turn by 90 degrees; two opposite turning plates (48) are hinged in a turning plate frame (49), and each turning plate (48) is provided with a turning plate driving device.

19. The plastic bag bagging machine according to claim 18, wherein the flap frame driving device adopts a flap frame driving cylinder (50), a hinge shaft between the flap frame (49) and the bracket (6) is hinged with one end of the flap frame driving cylinder (50) through a swing arm, and the other end of the flap frame driving cylinder (50) is hinged with the bracket (6); the turning plate driving device adopts a turning plate driving air cylinder (51), a convex plate (491) is connected to the middle part of a turning plate frame (49), and one ends of the two turning plate driving air cylinders (51) are hinged on the convex plate (491); the hinge shaft of each turning plate (48) is hinged with the other end of one turning plate driving cylinder (51) through a swing arm.

20. A plastic bag filling machine according to claim 1, characterized in that the manipulator lifting device (16) adopts a common cylinder capable of conveying products to the upper part in the mouth of the packaging bag or adopts a long distance lifting mechanism capable of conveying products to the bottom part in the mouth of the packaging bag.

21. A plastic bag filling machine according to claim 1, characterized in that the bag supporting means are provided with a follow-up pallet (52) and a follow-up pallet driving means.