An agricultural packaging film, its automatic production system and production method

Abstract

The present invention discloses an agricultural packaging film, an automatic production system thereof and a production method thereof, belonging to the field of agricultural products. The agricultural packaging film comprises a plurality of packaging film units connected in sequence, and discharge holes are arranged between adjacent packaging film units. The discharge holes include a plurality of through holes arranged linearly. Double-sided adhesive tapes are adhered to the surfaces of adjacent packaging film units. The double-sided adhesive tape comprises a release film and two adhesive tapes respectively adhered to both sides of the discharge holes of adjacent packaging film units. One end of the release film is adhered to one adhesive tape, and the other end of the release film is folded towards the discharge hole and adhered to the other adhesive tape, and the release film is in a folded shape. In the present invention, by folding the release film, it is cleverly placed between two units and still connected for a short time when the two units are separated, reducing problems such as curling of the film when it suddenly breaks.

Description

Technical Field

[0001] The present invention relates to the field of agricultural supplies, and particularly to an agricultural packaging film, an automatic production system thereof, and a production method thereof. Background Art

[0002] The prior art is the Z lock patented technology of TAMA Plastic Company in Israel. This technology divides a 500-meter-long plastic film into 24 pieces, and each piece wraps a crop into a roll with a cylinder diameter of 60 - 230 cm and a roll width of about 2.7 meters. The corresponding harvesting machine is the automatic harvesting machine of John Deere in the United States. When encountering a separation signal, it can make the supply film roll automatically brake. The crop packing roll continuously breaks the connection buckle of the film, and then automatically inputs the film to make a new packaging roll. As Figure 1 shown, when in use, during the packing of agricultural crops, the front and rear units 1 and 2 of the packaging film separate after braking at 10, and are bonded at the two break points 4 using a Z buckle 3. In a simple version, the complex Z buckle can also be made into a V-shaped interface.

[0003] The original technology first cuts the film, then bonds its Z buckle to the two break points, winds up the reconnected film, and then makes the next joint. A product requires making multiple joints. The Z buckle design is very ingenious. The bonding force of it just enables the film to be normally conveyed, but it can be easily disconnected after the harvesting machine brakes upon receiving a signal. Because the shape of its buckle is Z or V shape, the direction of the force is outward. When the pulling force is not large usually, it adheres tightly, but when the pulling force increases to a certain level, it will definitely break. Therefore, the viscosity of the glue can be very high and the reliability is very good. In addition to bonding, the buckle also serves to tightly wrap the crop roll, that is, the glue remaining on the film should tightly adhere to the end of the crop wrapping roll.

[0004] However, this technology has many major defects:

[0005] 1. The manufacturing process is complex. It needs to cut the film and then bond it. The technological process is generally as follows:

[0006] 1) First, cut the packaging film at a 90° waist cut;

[0007] 2) Unit 1 is folded back 180° (length 200 mm), and a mold needs to be used to clamp the folded part;

[0008] 3) The Z-shaped buckle is bonded to the 200-mm folded film of unit 1. The mold is used to align the buckle with the folded film, and then slowly press down to bond tightly;

[0009] 4) Since there is glue on the lower buckle, unit 2 rolls forward again, travels 200 mm to cover and paste on the Z buckle. Unit 1 remains stationary. After unit 2 is pulled over, it has to be suspended in the air to align;

[0010] 5) The tail head of the Z buckle is folded back 180 degrees and glued firmly to the upper end of Unit 2. Inserting and folding the buckle back and then gluing to Unit 2 is very difficult to mechanize.

[0011] 6) Unfold the entire Z buckle reversely and slowly wind it onto the product reel. Since the buckle must be unfolded and wound in the forward direction during packaging to be successfully opened on the harvester. The trouble with this step is that the film is too soft to form, and it needs to be clamped by a mold and then calibrated and pressed down.

[0012] In the production process of the prior art, it is very difficult to mechanize each step. Therefore, current domestic imitators all complete it manually, which is very time-consuming, slow, and has a low yield. Except for the first step of cutting the film, it is difficult to replace manual work with automation for the other steps. Because the film is nearly 3 meters wide and very thin, it is difficult to form. And in the second step, the film needs to be folded back by clamping it with a mold;

[0013] 2. Brushing glue on the production line pollutes the production line, and it is very difficult to clean the working site.

[0014] 3. The production speed is slow and the efficiency is low.

[0015] 4. The product qualification rate is low.

[0016] All the above operations are time-consuming and have high requirements for mechanization.

[0017] Therefore, it is necessary to provide a technology for the production and convenient use of agricultural crop packaging film. Summary of the Invention

[0018] The technical problem to be solved by the present invention is an agricultural packaging film, its automatic production system and production method. The present invention does not need to use the patent of folding Z buckles, and does not need to cut the film and then bond it during production. Use formed double-sided tape to solve the problem of applying glue on the production line, and use a release film to make the glue bond the crop roll more firmly, improve the production line efficiency, and improve the product quality.

[0019] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0020] On the one hand, the present invention provides an agricultural packaging film, which includes a plurality of packaging film units connected in sequence. There are row holes between adjacent packaging film units. The row holes include a plurality of through holes arranged linearly, which are convenient for tearing adjacent packaging film units. Double-sided tape is adhered to the surfaces of adjacent packaging film units. The double-sided tape includes a release film and two adhesive tapes respectively adhered to both sides of the row holes of adjacent packaging film units. One end of the release film is adhered to one adhesive tape, and the other end of the release film is folded towards the row hole and adhered to the other adhesive tape. The release film is in a folded shape.

[0021] Further, a third adhesive tape is provided on the packaging film unit outside the adhesive tape corresponding to the folded stripping film portion, and the third adhesive tape is adhered to the stripping film through the bending of the packaging film unit.

[0022] Further, the characteristics of the linearly arranged plurality of through holes are that the through holes in the middle position of the packaging film have a large aperture and a small interval, and the through holes on both sides of the packaging film have a small aperture and a large interval.

[0023] Further, the double-sided adhesive tape is centered on the row of holes.

[0024] On the other hand, an automatic production system for the agricultural packaging film is provided, including a packaging film production line, and further including a prefabricated double-sided adhesive tape roll, a double-sided adhesive tape mounting machine, and an automatic punching machine;

[0025] The prefabricated double-sided adhesive tape roll is a prefabricated double-sided adhesive tape, including a stripping film and at least two sections of adhesive tapes. One end of the stripping film is adhered to one section of the bonding tape, and the other end of the stripping film is folded towards the row of holes and bonded to another section of the bonding tape. The stripping film is in a folded shape;

[0026] The double-sided adhesive tape mounting machine includes a cutting machine, a pressing hand, a first mechanical gripper, a second mechanical gripper, and a track. The lower parts of the first and second mechanical grippers are both provided with lifting grippers for grasping the double-sided adhesive tape. The upper part of the second mechanical gripper is provided with a slider for sliding in the track. The double-sided adhesive tape is grasped and moved to the outer side of the packaging film by the second mechanical gripper and cooperates with the first mechanical gripper to move the double-sided adhesive tape downwards to cover the connection part of the adjacent packaging film units. The pressing hand is used to press the double-sided adhesive tape downwards and adhere it to the packaging film, and the cutting machine is used to cut the double-sided adhesive tape;

[0027] The automatic punching machine is used to punch the row of holes in the packaging film.

[0028] Further, the automatic punching machine is a programmable laser punching machine.

[0029] Further, the cutting machine is a laser cutting machine.

[0030] Further, a release paper is provided on the bonding tape of the prefabricated double-sided adhesive tape roll and is peeled off by an automatic machine when the double-sided adhesive tape is unfolded;

[0031] On yet another aspect, an automatic production method for the agricultural packaging film is provided, including:

[0032] 1) After the packaging film reaches the designated position, the punching machine punches a row of holes in the packaging film;

[0033] 2) The prefabricated double-sided adhesive tape roll is unfolded, and the double-sided adhesive tape with the adhesive surface exposed is pulled from one side of the packaging film to the other side through the mechanical gripper, corresponding to above the row of hole lines, and the double-sided adhesive tape is covered on the packaging film by pressing down through the mechanical gripper;

[0034] 3) Press down with your hand to make the prefabricated double-sided tape and film stick together;

[0035] 4) Cut off the double-sided tape, and the mechanical gripper and the downward pressure hand rise back to the starting position to prepare for the next operation.

[0036] Furthermore, the double-sided tape is covered with the hole line as the center line.

[0037] Furthermore, the punching machine is a programmable laser punching machine.

[0038] After adopting such a design, the present invention has at least the following advantages:

[0039] 1) The packaging film of the present invention does not require cutting and re-bonding, nor does it require the use of Z-clasps. Instead, a row of holes, evenly spaced and of equal diameter, are punched in the film. This allows the film to connect naturally when pressure is removed and to automatically separate under a certain amount of tension. This eliminates the prior art step of advancing unit 2 to bond the Z-clasps, reducing two steps on the production line. Because the broken film still needs to be glued to the end of the crop roll, the present invention uses prefabricated double-sided tape instead of the traditional adhesive. The double-sided tape is covered with a release film on the production line, which automatically peels away when the harvester disconnects the front and rear units. In the present invention, the release film is cleverly folded to create a connection between the two units, maintaining a short-term connection when the units separate, minimizing curling and other issues associated with sudden disconnection. Continued pulling releases the folded portion of the release film from the adhesive tape of the front unit, leaving the release film on the rear unit. This means that after the film is disconnected, the release film remains on the rear unit. Because the release film is relatively hard, it guides the rear unit's film more smoothly into the harvester's guide rails for the next crop packaging operation. The design of the peeling film allows the packaging film to be covered with two intervals of harder films at the moment it is broken, which offsets the large rebound force, prevents the film from curling, and allows it to enter the machine for packaging smoothly, preventing the film from being entangled on many rotating shafts and tracks.

[0040] 2) During the production of the agricultural packaging film of the present invention, since the packaging film is stationary on the workbench, the prefabricated double-sided adhesive is applied in the form of a roll, thereby eliminating the complex steps of molds and alignment in steps 2) to 5) of the prior art, and converting them all into simple rolling operations, which are completely replaced by simple mechanization;

[0041] 3) The present invention uses a flat, peelable film between the packaging film units, eliminating the need for a protruding buckle. Therefore, the winding and folding steps in step 5) of the prior art are no longer necessary. Furthermore, the present invention utilizes double-sided tape to ensure smooth winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the following provides a more detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0043] Figure 1 is a schematic structural diagram of the crop wrapping structure of the existing agricultural packaging film;

[0044] Figure 2 is a schematic diagram of the structural change of an embodiment of the agricultural packaging film of the present invention, where (A) is the original state; (B) is the state after the packaging film unit is torn;

[0045] Figure 3 is a schematic structural diagram of an embodiment of the agricultural packaging film of the present invention after being torn;

[0046] Figure 4 is a schematic diagram of the structural change of another embodiment of the agricultural packaging film of the present invention, where (A) is the original state; (B) is the state after being pulled; (C) is the state after the packaging film unit is torn;

[0047] Figure 5 is a schematic diagram of the structural state of the perforation used when the agricultural packaging film of the present invention is in use;

[0048] Figure 6 is a schematic structural diagram of the automatic production system of the agricultural packaging film of the present invention;

[0049] Figure 7 is a schematic side view of the automatic production system of the agricultural packaging film of the present invention;

[0050] Figure 8 is a schematic top view of the mechanical gripper used in the automatic production system of the agricultural packaging film of the present invention. Detailed Embodiments

[0051] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.

[0052] Those skilled in the art of the present technology can understand that unless specifically stated otherwise, the singular forms "a", "an", "the", and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present invention means the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or their groups.

[0053] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms used herein (including technical terms and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which the present invention pertains. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined.

[0054] The present invention provides an embodiment of an agricultural packaging film, as Figures 2 to 5 shown, including a plurality of packaging film units 1' (or 2') connected in sequence. There are row holes 6 provided between adjacent packaging film units 1' and 2'. The row holes 6 include a plurality of through holes arranged linearly, which facilitate tearing the adjacent packaging film units 1' and 2' apart. Double-sided adhesives 5 are adhered to the surfaces of the adjacent packaging film units 1' and 2'. The double-sided adhesives 5 include a release film 51 and two adhesive tapes 52 respectively adhered to both sides of the row holes 6 of the adjacent packaging film units 1' and 2'. One end of the release film 51 is adhered to one adhesive tape 52, and the other end of the release film 51 is folded towards the row holes 6 and adhered to the other adhesive tape 52. The release film 51 is in a folded shape.

[0055] When the present invention is in use, when using the agricultural packaging film to roll up crops, after completing the packaging of one packaging film unit, by applying pressure and tearing, due to the design of the row holes, the packaging film can be torn relatively gently. And due to the design of the folded release film, it is cleverly placed between the two units and remains connected for a short time when the two units are separated, reducing problems such as curling when the film suddenly breaks. When continuing to pull, the folded part of the release film is untied from the adhesive tape on the front unit, and the release film remains on the rear unit, that is, the release film remains on the subsequent unit after the film is broken. Since the release film is made of a relatively hard material, it can guide the subsequent unit film to enter the guiding track of the harvesting machine more smoothly to perform the work of packaging the next crop.

[0056] The packaging film of the present invention does not require cutting and re-bonding, nor does it require the use of Z-clasps. Instead, a row of holes, evenly spaced and of equal diameter, are punched in the film. This allows the film to connect naturally when pressure is removed and to separate automatically under a certain tension. This eliminates the prior art step of advancing unit 2 to bond the Z-clasps, reducing two steps on the production line. Because the broken film still needs to be glued to the end of the crop roll, the present invention uses pre-made double-sided tape instead of the traditional adhesive application. The double-sided tape is covered with a peeling film on the production line, which is automatically removed by the pulling force when the harvester disconnects the front and rear units. This design of the peeling film ensures that, immediately after the film is disconnected, the film entering the packaging machine is covered with two relatively hard films, offsetting the significant rebound force, preventing the film from curling and allowing it to enter the packaging machine smoothly for packaging, preventing it from tangling on the numerous rotating shafts and tracks. The present invention uses a flat peeling film between the packaging film units, eliminating the need for protruding clasps, for smooth rewinding.

[0057] The diameter of the holes and the spacing between the holes can be adjusted to suit the required tension. The holes can be punched by laser or machine.

[0058] Because plastic packaging film is elastic, it rebounds when stretched, causing the film to curl. This curling makes the film uneven and difficult to process into the next packaging step. We address this issue by designing different perforation densities and spacings during laser programming.

[0059] Furthermore, the linear arrangement of through-holes is characterized by large apertures and close spacing in the center of the film, while smaller apertures and wider spacing are found on the edges. This design offers the following advantages: the center breaks first during film breaking, ensuring even tension on both sides and preventing film deviation. The film also breaks more gradually than instantly, ensuring a smooth transition to the next film cycle.

[0060] In theory, the wider the adhesive tape corresponding to the folded peeling film portion is, the more buffer time can be provided to reduce the rebound problem of the packaging film.

[0061] In order to further reduce the problem of film rolling when disconnected, as an improvement, Figure 4 As shown, a third adhesive tape 53 is also provided on the packaging film unit 1' outside the adhesive tape 52 corresponding to the folded release film portion. The third adhesive tape 53 is adhered to the release film 51 by bending the packaging film unit 1'. This double-S double-sided adhesive lamination design effectively mitigates the effects of rebound forces. This can be accomplished by adding a packaging film bending step during production, using a folding machine. The specific usage process is as follows:

[0062] 1. Before the packaging film is separated, the double S buckle covers the perforated breaking line of the row of holes;

[0063] 2. The wrapping film roll receives a signal to brake. Since the peeling film is designed between the upper two double-sided adhesives, the first S buckle is automatically unfastened;

[0064] 3. After the two double-sided adhesives are unfolded, they are in a parallel state, and the second S buckle is still covered on the second double-sided adhesive;

[0065] 4. After the film is disconnected along the perforation line, the adhesive surfaces of the two double-sided adhesives on unit 1' are exposed, waiting to be adhered to the end of the packaging roll;

[0066] 5. Unit 2' is smoothly connected to the peeling film and is ready to enter the next packaging cycle.

[0067] Furthermore, the double-sided adhesive 5 is centered on the row of holes 6.

[0068] On the other hand, an embodiment of the automatic production system of the above-mentioned agricultural packaging film is provided, as Figures 5 to 8 shown, including a packaging film production line, and also including a prefabricated double-sided adhesive roll 50, a double-sided adhesive installation machine, and an automatic punching machine;

[0069] The prefabricated double-sided adhesive roll 50 is a prefabricated double-sided adhesive, including a peeling film 51 and at least two sections of adhesive tapes 52. One end of the peeling film 51 is adhered to one section of the adhesive tape 52, and the other end of the peeling film 51 is folded towards the row of holes 6 and adhered to another section of the adhesive tape 52. The peeling film 51 is in a folded shape;

[0070] The double-sided adhesive installation machine includes a cutting machine 74, a pressing hand 75, a first mechanical gripper 71, a second mechanical gripper 72, and a track 73. Lifting grippers for grasping the double-sided adhesive 5 are provided at the lower parts of the first mechanical gripper 71 and the second mechanical gripper 72. A slider for sliding in the track 73 is provided at the upper part of the second mechanical gripper 72. The double-sided adhesive 5 is grasped and moved to the outer side of the packaging film by the second mechanical gripper 72 and cooperates with the first mechanical gripper 71 to move the double-sided adhesive 5 downward to cover the connection part of adjacent packaging film units. The pressing hand 75 is used to press and adhere the double-sided adhesive 5 onto the packaging film, and the cutting machine 74 is used to cut the double-sided adhesive 5;

[0071] The automatic punching machine is used to punch rows of holes 6 in the packaging film.

[0072] Furthermore, the automatic punching machine is a programmable laser punching machine.

[0073] Furthermore, the cutting machine 74 is a laser cutting machine.

[0074] Furthermore, a release paper 54 is also provided on the adhesive tape of the prefabricated double-sided adhesive roll 50 and is peeled off by an automatic machine when the double-sided adhesive is unfolded.

[0075] On yet another aspect, an automatic production method of the above-mentioned agricultural packaging film is provided. The automatic production system of the above-mentioned agricultural packaging film can be adopted, including:

[0076] 1) After the packaging film reaches the designated position, the punching machine punches holes in the packaging film. The punching machine can be mechanical or laser.

[0077] 2) The double-sided tape roll is unrolled, and a mechanical gripper pulls the exposed adhesive surface of the double-sided tape from one side of the packaging film to the other side, corresponding to the position above the perforation line, and then presses down with the mechanical gripper to cover the double-sided tape on the packaging film;

[0078] 3) Press down with your hand to make the prefabricated double-sided tape and film stick together;

[0079] 4) Cut off the double-sided tape, and the mechanical gripper and the downward pressure hand rise back to the starting position to prepare for the next operation.

[0080] Furthermore, the double-sided tape is covered with the hole line as the center line.

[0081] Furthermore, the punching machine is a programmable laser punching machine.

[0082] An embodiment of a method for automatically producing the agricultural packaging film of the present invention is:

[0083] First, a row of holes is punched in the packaging film. The punch is positioned perpendicular to the production line, 20-60 cm above the production line table. The required tension is inversely proportional to the hole diameter and spacing. The required hole diameter and spacing are easily calculated based on the material. The equipment automatically adjusts to the specific tension application scenario.

[0084] Secondly, after the double-sided tape prefabricated roll is unrolled, the release paper is first retracted at the bottom. The length of the double-sided tape is equal to the width of the film. The peeling film on the bottom is peeled off and glued to the back film about 5 cm behind the perforation line, with a width of about 20-30 cm. (Because the direction of the production line is opposite to that when rolling, it is glued at the rear unit).

[0085] The double-sided tape is covered with a pre-made release film. This release film is peeled off when wrapping the crop, exposing the double-sided tape for the end of the roll. The other end of the release film is connected to the front unit of the perforated line, where it is glued to the front unit. During the actual roll, the front unit becomes the rear unit. The rear unit brakes and generates force to peel back the release film, exposing the double-sided tape, which then adheres to the end of the crop roll. The release film is attached to the rear unit. Due to its relatively hard texture, it serves as a guide for the rear unit's film to enter the roll-up machine, allowing it to smoothly pass through the next roll.

[0086] Again, the double-sided tape with the adhesive surface exposed is clamped by the second mechanical gripper on the left side of the production packaging film; the second mechanical gripper pulls the double-sided tape horizontally above the film along the track to the right to cover the film; the first mechanical gripper fixes the double-sided tape on the left side of the packaging film; the first and second mechanical grippers press down to make the double-sided tape cover the film with the perforation line as the center line; the pressing hand presses down to make the prefabricated double-sided tape adhere tightly to the film; the laser machine cuts the double-sided tape at the left edge of the film; the traction hand and the pressing hand lift up; the packaging film moves forward to the next interface, and the second mechanical gripper returns to the starting position on the left along the track. Thus, the automatic adhesion of the double-sided tape is completed.

[0087] The next cycle starts again.

[0088] In order to facilitate the peeling off from the double-sided tape smoothly, the release film has a 180-degree fold covering the double-sided tape. This design is very ingenious and can make the release film be easily peeled off from the double-sided tape. Figures 2 to 5 It shows the situation after the separation of the front and rear units when the crop is curled. After the crop curling is completed, the adhesion at the tail is fixed by the double-sided tape on the film. Thus, a curling cycle ends. The next curl starts automatically.

[0089] Compared with the prior art, the new technology has the following improvements:

[0090] 1. Instead of cutting the raw material film and then bonding, the problem is solved by punching holes, which reduces at least 3 processes in the production line and fundamentally eliminates the original Z-buckle design.

[0091] 2. Using double-sided tape instead of applying glue on the production line improves efficiency and reduces pollution of the production line.

[0092] 3. The original production line was more than 10 meters long, but now only about 5 meters is needed.

[0093] 4. Greatly improves production efficiency, and the speed of producing a roll of film can be several times that of the original production technology.

[0094] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in any form. Those skilled in the art can make some simple modifications, equivalent changes or decorations using the disclosed technical content above, and all fall within the protection scope of the present invention.

Claims

1. An agricultural packaging film, characterized in that, It includes a number of packaging film units connected in sequence. There are discharge holes between adjacent packaging film units. The discharge holes include a number of through holes arranged linearly. Double-sided adhesives are adhered to the surfaces of adjacent packaging film units. The double-sided adhesives include a release film and two adhesive tapes respectively adhered to both sides of the discharge holes of adjacent packaging film units. One end of the release film is adhered to one adhesive tape, and the other end of the release film folds towards the discharge hole and is adhered to the other adhesive tape. The release film is in a folded shape.

2. The agricultural packaging film according to claim 1, wherein, A third adhesive tape is also provided on the packaging film unit outside the adhesive tape corresponding to the folded part of the release film. The third adhesive tape is adhered to the release film through the bending of the packaging film unit.

3. The agricultural packaging film according to claim 1 or 2, characterized in that, The characteristics of the number of linearly arranged through holes are as follows: the through holes in the middle position of the packaging film have a large aperture and a small interval, while the through holes on both sides of the packaging film have a small aperture and a large interval.

4. The agricultural packaging film according to claim 1 or 2, characterized in that The double-sided adhesive takes the discharge hole as the center line.

5. An automatic production system for the agricultural packaging film according to any one of claims 1 to 4, comprising a packaging film production line, characterized in that, It also includes a prefabricated double-sided adhesive roll, a double-sided adhesive installation machine and an automatic punching machine; The prefabricated double-sided adhesive roll is a prefabricated double-sided adhesive, including a release film and at least two adhesive tapes. One end of the release film is adhered to one adhesive tape, and the other end of the release film folds towards the discharge hole and is adhered to the other adhesive tape. The release film is in a folded shape; The double-sided adhesive installation machine includes a cutting machine, a pressing hand, a first mechanical gripper, a second mechanical gripper and a track. Lifting grippers for grasping the double-sided adhesive are provided at the lower parts of the first and second mechanical grippers. A slider for sliding in the track is provided at the upper part of the second mechanical gripper. The double-sided adhesive is grasped and moved to the outer side of the packaging film by the second mechanical gripper and cooperates with the first mechanical gripper to move the double-sided adhesive downward to cover the connection part of adjacent packaging film units. The pressing hand is used to press down the double-sided adhesive and adhere it to the packaging film. The cutting machine is used to cut off the double-sided adhesive; The automatic punching machine is used to punch the discharge holes in the packaging film.

6. The automatic production system of the agricultural packaging film according to claim 5, characterized in that The automatic punching machine is a programmable laser punching machine; And / or, the cutting machine is a laser cutting machine.

7. The automatic production system of the agricultural packaging film according to claim 5 or 6, characterized in that Separator paper is also provided on the adhesive tape of the prefabricated double-sided adhesive roll and is peeled off by an automatic machine when the double-sided adhesive is unfolded.

8. An automatic production method for the agricultural packaging film according to any one of claims 1 to 4, characterized in that, It includes: 1) After the packaging film reaches the designated position, the punching machine punches discharge holes in the packaging film; 2) The prefabricated double-sided adhesive roll is unfolded. The double-sided adhesive with the adhesive surface exposed is pulled from one side of the packaging film to the other side by a mechanical gripper, corresponding above the discharge hole line, and the double-sided adhesive is covered on the packaging film by pressing down with the mechanical gripper; 3) By pressing down with the pressing hand, the prefabricated double-sided adhesive and the film are tightly adhered; 4) The double-sided adhesive is cut off, and the mechanical gripper and the pressing hand rise back to the starting position to prepare for the next operation.

9. The automatic production method of the agricultural packaging film according to claim 8, characterized in that, The covering of the double-sided adhesive takes the discharge hole line as the center line.

10. The automatic production method of the agricultural packaging film according to claim 8 or 9, characterized in that, The punching machine is a programmable laser punching machine.

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