A glue coating and drying integrated machine for producing PET polyester film for packaging bags

Abstract

The present invention relates to a gluing and drying integrated machine for producing PET polyester film for packaging bags, which includes a gluing unit, a drying unit, a conveying unit, and an exhaust unit. The present invention re-introduces the filtered glue into a glue tank through a screen and a circulation component to keep the glue in the glue tank clean and uniform; through an overflow pipeline, the glue in the glue tank is effectively prevented from overflowing, thereby reducing the labor intensity of the staff; through an auxiliary roller, the glue on the surface of the gluing roller is evenly distributed, thereby improving the gluing effect; through an exhaust duct arranged above the drying component, the pungent gas generated during drying is discharged, thereby improving the workshop environment; using a valve plate component, the size of the exhaust port is adjusted according to needs, the power used by the negative pressure fan is reduced, energy consumption is reduced for the enterprise, and electricity costs are saved; through a deviation correction component, the PET polyester film is prevented from being offset during transmission, ensuring that the PET polyester film can be aligned and fitted, thereby improving the yield rate of the produced packaging bags.

Description

Technical Field

[0001] The invention belongs to the field of glue coating and drying integrated machines, and in particular relates to a glue coating and drying integrated machine for producing PET polyester films for packaging bags. Background Art

[0002] At present, when enterprises produce packaging bags, they need to first coat the PET polyester film used to make packaging bags with glue, and then dry it after coating glue on one side of the PET polyester film. Finally, the dried PET polyester film is sent to the laminating machine through a conveyor roller for the laminating process. In the gluing process, most enterprises set a glue tank under the PET polyester film, and use a glue coating roller immersed in the glue liquid in the glue tank to coat glue on one side of the PET polyester film passing through the glue coating roller.

[0003] However, in the actual gluing and drying process, the following defects are prone to occur:

[0004] 1) Since the glue is left standing for a long time, the substances contained in the glue are easy to precipitate. As a result, the glue attached to the glue roller is of poor quality, resulting in poor gluing effect. In addition, impurities are easily mixed into the glue during the production process, affecting the quality of the glue, resulting in poor quality of the final packaging bags;

[0005] 2) Since the liquid output and feed volume of the glue tank cannot maintain a stable balance, it is easy to cause the glue liquid level in the glue tank to be too high or even overflow the glue tank, causing waste and increasing costs. Therefore, manual real-time monitoring is required, which increases the labor intensity of the staff;

[0006] 3) During the production process, the glue attached to the surface of the glue roller is unevenly distributed, which affects the gluing effect and easily leads to poor quality of the packaging bags produced later;

[0007] 4) During the drying process, a large amount of pungent odor is easily generated, which seriously affects the working environment of the operators and poses a threat to their health;

[0008] 5) In the actual transmission process, the PET polyester film is very easy to slide relative to the transmission roller it is wrapped around, deviating from the transmission track, resulting in the PET polyester films being unable to align and laminate in the subsequent lamination process, causing the produced packaging bags to be scrapped, increasing the company's production costs. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved integrated gluing and drying machine for producing PET polyester films for packaging bags.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0011] A gluing and drying integrated machine for producing PET polyester film for packaging bags, comprising:

[0012] The glue coating unit includes a glue tank containing glue liquid and a glue coating roller, wherein the glue coating roller is immersed in the glue liquid from the bottom, and the PET polyester film passes over the glue coating roller;

[0013] A drying unit, comprising a drying component;

[0014] The conveying unit includes a conveying roller, a conveying frame, a tension roller, and an output roller, wherein the conveying roller is arranged above the glue coating roller. After the PET polyester film is wound around the conveying roller, the tension is adjusted by the tension roller, and finally the PET polyester film extends from the tension roller to the output roller and is wound around the output roller.

[0015] The glue tank is provided with a liquid outlet, and a screen is intercepted on the liquid outlet;

[0016] The glue coating unit further includes a liquid receiving barrel, a circulation component, an overflow pipeline, and an auxiliary roller, wherein the circulation component connects the liquid receiving barrel and the glue tank, and when the glue in the glue tank flows into the liquid receiving barrel from the liquid outlet, the circulation component re-introduces the glue in the liquid receiving barrel into the glue tank, the overflow pipeline is arranged in the glue tank and communicated with the liquid receiving barrel, the auxiliary roller is arranged on the side where the glue is turned out from the lower part of the glue coating roller, and a mesh pattern is formed on the outer periphery of the auxiliary roller;

[0017] The gluing and drying machine also includes an exhaust unit, which includes an exhaust duct located above the drying component, a valve plate member arranged in the exhaust duct and capable of adjusting the size of the exhaust port, and a negative pressure fan connected to the exhaust duct, wherein the valve plate member includes a valve plate flipped and arranged in the exhaust channel, and an exhaust port is formed between the edge of the valve plate and the inner wall of the exhaust duct;

[0018] The conveying unit also includes a first correcting component, a second correcting component, and a locking component, wherein the first correcting component and the second correcting component are respectively arranged on both sides of the PET polyester film, and the first correcting component and the second correcting component are synchronously flipped and arranged on the conveying frame, and the locking component locks the first correcting component and the second correcting component relative to the conveying frame.

[0019] Preferably, the overflow pipe extends upward from the bottom of the glue tank, wherein the overflow port of the overflow pipe is located between the bottom of the glue coating roller and the top of the glue tank, so as to ensure that the lower part of the glue coating roller remains immersed in the glue liquid.

[0020] Specifically, the overflow pipeline is connected to the liquid receiving bucket from the lower end, and the connection point is higher than the liquid level of the glue in the liquid receiving bucket. This arrangement can ensure that the overflow pipeline works normally.

[0021] Preferably, the circulation component includes a circulation pump and a pipeline. The circulation pump is arranged in the liquid receiving barrel. The pipeline is connected to the circulation pump from one end and communicated with the glue tank from the other end.

[0022] Preferably, the valve plate is square, and the distance between the valve plate and the inner wall of the exhaust duct from its two opposite sides is adjustable, a gap is formed between the other two opposite sides and the inner wall of the exhaust duct, or the other two opposite sides abut against the inner wall of the exhaust duct.

[0023] According to a specific implementation and preferred aspect of the present invention, the valve plate member further includes a rotating shaft, which crosses the exhaust duct and is fixedly connected to the valve plate, and the valve plate is arranged to be flipped up and down around the rotating shaft.

[0024] Specifically, the exhaust unit also includes an adjusting component, and the adjusting component drives the rotating shaft to rotate around its center line.

[0025] Preferably, the conveying rack includes a first side plate and a second side plate respectively arranged on both sides of the PET polyester film, and the first correcting component and the second correcting component are respectively fixed on the first side plate and the second side plate by locking components, and are symmetrically arranged about the center line of the length direction of the PET polyester film.

[0026] Specifically, the transmission unit further includes a synchronous shaft that crosses the first side plate and the second side plate, and the first deviation-correcting component and the second deviation-correcting component are respectively connected to both ends of the synchronous shaft and are synchronously turned around the synchronous shaft. In this way, only one of the deviation-correcting components needs to be adjusted, and the other can also be turned synchronously, thereby improving efficiency.

[0027] In addition, the first side plate and the second side plate are respectively formed with a first adjustment groove and a second adjustment groove, wherein the first adjustment groove and the second adjustment groove are symmetrically arranged about the center line of the length direction of the PET polyester film, and the synchronization shaft passes through the first adjustment groove and the second adjustment groove from both ends, and is arranged to be translated along the extension direction of the first adjustment groove and the second adjustment groove. The advantage of such an arrangement is that the adjustment is more flexible, so that the wheel discs on both sides are more accurately matched to the two sides of the PET polyester film.

[0028] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0029] The present invention re-introduces the filtered glue liquid into the glue tank through the screen and the circulation component, so as to keep the glue liquid in the glue tank clean and uniform; through the overflow pipeline, the glue liquid in the glue tank is effectively prevented from overflowing, thereby reducing the labor intensity of the staff; through the auxiliary roller, the glue liquid on the surface of the glue coating roller is evenly distributed, thereby improving the gluing effect; through the exhaust duct arranged above the drying component, the pungent gas generated during drying is discharged, thereby improving the workshop environment; through the valve plate component, the size of the exhaust port is adjusted according to the needs, the power used by the negative pressure fan is reduced, the energy consumption is reduced for the enterprise, and the electricity cost is saved; through the deviation correction component, the PET polyester film is prevented from being offset during transmission, so as to ensure that the PET polyester film can be aligned and fitted, thereby improving the yield rate of the produced packaging bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a gluing and drying integrated machine for producing PET polyester film for packaging bags according to the present invention;

[0031] Figure 2 for Figure 1 A magnified schematic diagram of the main view of the middle auxiliary roller;

[0032] Figure 3 for Figure 1 A schematic diagram of the left side of the transmission unit;

[0033] Figure 4 for Figure 1 An enlarged schematic diagram of the deviation-correcting component;

[0034] Figure 5 for Figure 1 An enlarged left view of the middle valve plate and the regulating assembly;

[0035] Wherein: x, PET polyester film;

[0036] 1. Glue coating unit; 10. Glue tank; a0. Liquid outlet; b. Screen; a1. Overflow pipeline; a10. Vertical section; a11. Horizontal section; a2. Liquid inlet; 11. Glue coating roller; 12. Auxiliary roller; 13. Liquid receiving barrel; 14. Circulation component; 140. Circulation pump; 141. Pipeline;

[0037] 2. Drying unit;

[0038] 3. Conveying unit; 30. Conveying roller; 31. Tension roller; 32. Output roller; 33. Conveying frame; 330. First side plate; 331. Second side plate; c. Adjusting slot; 34. Correction component; 340. Correction wheel; d. Limiting slot; 341. Turning rod; 35. Synchronous shaft; 36. Locking member;

[0039] 4. Exhaust unit; 40. Exhaust duct; 41. Valve plate; 410. Valve plate; 411. Rotating shaft; 42. Adjustment assembly; 420. Base; 421. Adjustment rod; e1. First bevel gear; e2. Second bevel gear; 422. Fixed component; 43. Negative pressure fan. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0046] like Figure 1 As shown, the gluing and drying integrated machine for producing PET polyester film for packaging bags of this embodiment includes a gluing unit 1, a drying unit 2, a conveying unit 3, and an exhaust unit 4, wherein the PET polyester film x is coated with glue by the gluing unit 1, dried by the drying unit 2, and then conveyed into the composite equipment through the conveying unit 3.

[0047] Specifically, the glue coating unit 1 includes a glue tank 10 containing glue liquid, a glue coating roller 11 , an auxiliary roller 12 , a liquid receiving barrel 13 , and a circulation component 14 .

[0048] Specifically, the glue tank 10 is in a rectangular parallelepiped shape, and a liquid outlet a0 is provided on the left side of the glue tank 10, an overflow pipe a1 is provided at the bottom near the liquid outlet a0, and a liquid inlet a2 is provided on the right side.

[0049] In this example, the liquid outlet a0 extends obliquely from the right side of the glue tank 10 to the lower left, and the cross section of the liquid outlet a0 forms a trapezoidal shape with a narrow bottom and a wide top, and a screen b is intercepted on the liquid outlet a0. This arrangement ensures smooth outflow of the glue liquid and effectively filters impurities in the glue liquid.

[0050] The overflow pipe a1 includes a vertical section a10 and a horizontal section a11, wherein the vertical section a10 vertically passes through the bottom of the glue tank 1 upwards, and the overflow port of the overflow pipe a1 is located between the bottom of the glue roller 2 and the top of the glue tank 1; the horizontal section a11 extends horizontally to the left from the lower end of the vertical section a10. In this way, the glue tank can be prevented from overflowing due to excessive glue without manual monitoring, thereby avoiding waste and reducing costs.

[0051] Specifically, the glue coating roller 11 is immersed in the glue solution from the bottom and is arranged near the middle of the glue tank 10, the PET polyester film x passes over the glue coating roller 2, and the glue coating roller 11 is arranged at a distance from the top of the PET polyester film x. This arrangement avoids direct contact between the PET polyester film and the glue coating roller, avoids film damage and improves the glue coating effect.

[0052] Specifically, the auxiliary roller 12 is arranged at the lower right side of the glue coating roller 11, that is, at the side where the glue liquid is rotated out from the lower part of the glue coating roller 11, and is combined with Figure 2 As shown, the surface of the auxiliary roller 12 is formed with a spiral mesh.

[0053] At the same time, the auxiliary roller 12 is tangentially arranged with the glue coating roller 11, and the auxiliary roller 12 is immersed in the glue liquid from the bottom. This arrangement makes the glue liquid attached to the surface of the glue coating roller 11 uniform, the glue coating effect is better, and the impurities adhered to the surface of the glue coating roller can also be scraped off.

[0054] Specifically, the liquid receiving bucket 13 is arranged below the liquid outlet a0, and the liquid receiving bucket 13 is connected to the horizontal section a11 at the lower end of the overflow pipeline a1 from the side wall, and the connection point is located above the liquid level in the liquid receiving bucket 13. In this way, the overflow pipeline can work normally.

[0055] Specifically, the circulation component 14 includes a circulation pump 140 and a pipeline 141 .

[0056] In this example, the circulating pump 140 is fixedly arranged at the bottom of the liquid receiving barrel 13, the pipe 141 passes through the side wall of the liquid receiving barrel 13 from one end and is connected to the circulating pump 140, and is connected to the liquid inlet a2 from the other end and is connected to the glue tank 10, and the connecting point between the pipe 141 and the glue tank 10 is located above the glue liquid level in the glue tank 10.

[0057] That is, the circulation pump 140 extracts the glue liquid from the liquid receiving barrel 13, and after passing through the pipeline 141, it enters the glue tank 10 from the liquid inlet a2. In this way, the glue liquid immersed in the glue coating roller can be kept in circulation all the time, ensuring the uniformity of the glue liquid attached to the glue coating roller.

[0058] In this example, the drying unit 2 uses a UV light source to dry the PET polyester film x after being coated with glue.

[0059] Specifically, the conveying unit 3 includes a conveying roller 30 , a tension roller 31 , an output roller 32 , a conveying frame 33 , a deviation correcting component 34 , a synchronization shaft 35 , and a locking member 36 .

[0060] In this example, the conveying roller 30 is arranged above the coating roller 11, the tension roller 31 is arranged on the upper left of the conveying roller 30, and the output roller 32 is arranged above the tension roller 31. After the PET polyester film x wraps around the conveying roller 30, the tension is adjusted by the tension roller 31, and finally it extends from the tension roller 31 to the output roller 32 and is wrapped around the output roller 32.

[0061] Combination Figure 3 As shown, the conveying frame 33 includes a first side plate 330 and a second side plate 331 vertically arranged on both sides of the PET polyester film x, wherein the first side plate 330 and the second side plate 331 are arranged parallel to each other.

[0062] Combination Figure 4 As shown, an adjustment groove c is formed on the first side plate 330 . The adjustment groove c is in an arc shape, and the center of the arc is located on a side of the arc close to the PET polyester film x.

[0063] In this example, the same adjustment groove c is also formed on the second side plate 331 , and the adjustment groove c on the second side plate 331 is aligned with the adjustment groove c on the first side plate 330 in the horizontal direction.

[0064] Specifically, there are two groups of deviation-correcting components 34 , and the two groups of deviation-correcting components 34 are respectively arranged on both sides of the PET polyester film x and are symmetrically arranged about the center line of the length direction of the PET polyester film x.

[0065] Each set of deviation-correcting components 34 includes a deviation-correcting wheel disc 340 and a turning rod 341 fixedly connected to the deviation-correcting wheel disc 340 .

[0066] In this example, the deflection correction wheel 340 is in the shape of a disk, and a limiting groove d matching the PET polyester film x is formed along the outer circumference of the disk. This arrangement protects the side of the PET polyester film and prevents the PET polyester film from colliding with the wheel.

[0067] The turning rod 341 is vertically connected to the center of the disc from one end, and the turning rod 341 is turned around the end away from the disc. In this way, the position of the wheel disc can be adjusted according to the position of the PET polyester film in actual production, and the operation is simple and convenient.

[0068] Specifically, the synchronization shaft 35 crosses the adjustment slots c on the first side plate 330 and the second side plate 331 from both ends, and the synchronization shaft 35 is arranged to translate along an arc track, and the two sets of deviation-correcting components 34 are respectively fixedly connected to the synchronization shaft 35 from one end of the flip rod 341 away from the deviation-correcting wheel disc 340. In this way, only one of the deviation-correcting components 34 needs to be adjusted, and the other can also be flipped synchronously, thereby improving efficiency.

[0069] That is to say, when adjusting the position of the deviation correcting wheel 340, it can be adjusted by rotating the synchronization shaft 35, and it can also be adjusted by translating the synchronization shaft 35 in the adjustment slot c. The advantage of this arrangement is that the adjustment is more flexible, so that the wheels on both sides can be more accurately matched to the two sides of the PET polyester film.

[0070] Specifically, the locking member 36 is a locking bolt, and a thread matching the locking bolt is formed on the end of the synchronization shaft 35 passing through the adjustment slot c. After the position of the deviation correction wheel 340 is adjusted, the two groups of deviation correction components 34 on both sides of the PET polyester film x are respectively locked relative to the first side plate 330 and the second side plate 331 through the cooperation of the locking member 36 and the synchronization shaft 35. The operation is simple and the use cost is low.

[0071] Specifically, the exhaust unit 4 includes an exhaust duct 40 , a valve plate 41 disposed in the exhaust duct 40 , an adjustment component 42 for adjusting the valve plate 41 , and a negative pressure fan 43 connected to the exhaust duct 40 .

[0072] The exhaust duct 40 has a square cross-section and is disposed above the drying component 20 .

[0073] The valve plate member 41 includes a valve plate 410 and a rotating shaft 411 fixedly connected to the valve plate 410 , wherein the valve plate 410 is intercepted and arranged in the exhaust duct 40 near the duct opening, and the valve plate 410 is turned upside down around the rotating shaft 411 .

[0074] The valve plate 410 is square, and the distance between the two opposite sides of the valve plate 410 and the inner wall of the exhaust duct 40 can be adjusted as the valve plate 410 is turned over, and gaps are formed between the other two opposite sides of the valve plate and the inner wall of the exhaust duct 40. In this way, when the valve plate is turned over, the side of the valve plate is prevented from scratching the inner wall of the exhaust duct 40.

[0075] The rotating shaft 411 is arranged to cross the left and right sides of the exhaust duct 40 and pass through the left side wall of the exhaust duct 40 from the left end, and the center line of the rotating shaft 411 coincides with the center line of the valve plate 410 in the horizontal direction. In this way, the valve plates on both sides of the rotating shaft are evenly stressed, which prolongs the service life of the valve plates.

[0076] Meanwhile, the rotating shaft 411 is welded to the bottom surface of the valve plate 410. This arrangement is simple to process, fast to form, and low in cost.

[0077] Combination Figure 5 As shown, the adjustment assembly 42 includes a base 420 , an adjustment rod 421 , and a fixing component 422 for fixing the adjustment rod 421 .

[0078] The base 420 is fixedly connected to the left outer wall of the exhaust duct 40 .

[0079] The adjusting rod 421 is disposed below the portion where the rotating shaft 411 passes through the left side wall of the exhaust duct 40 , and is disposed perpendicular to the rotating shaft 411 .

[0080] In particular, the adjusting rod 421 is provided with a first bevel gear e1, and the rotating shaft 411 is provided with a second bevel gear e2 matching the first bevel gear e1, and when the adjusting rod 421 is rotated, the rotating shaft 411 is driven to rotate through the transmission between the first bevel gear e1 and the second bevel gear e2, so that the valve plate 410 is turned upside down. In this way, the gear transmission performance is reliable and the cost is low.

[0081] The fixing component 422 is a bolt. When the adjusting rod 421 drives the rotating shaft 411 to adjust, the fixing component 422 locks the adjusting rod 421 and the base 420 relative to each other.

[0082] In addition, in this embodiment, after the valve plate 410 is adjusted according to actual production needs, the power usage of the negative pressure fan 43 can be adjusted according to the size of the exhaust port formed between the valve plate 410 and the inner wall of the exhaust duct 40 to reduce energy consumption and save electricity costs for the enterprise.

[0083] Therefore, this embodiment has the following advantages:

[0084] 1. Re-introduce the filtered glue liquid into the glue tank through the screen and circulation components to keep the glue liquid in the glue tank clean and uniform;

[0085] 2. By setting up the overflow pipeline in the glue tank, the glue in the glue tank can be effectively prevented from overflowing without manual real-time monitoring, thus reducing the labor intensity of the staff;

[0086] 3. The auxiliary roller is set on one side of the glue coating roller to make the glue evenly distributed on the surface of the glue coating roller, thus improving the gluing effect;

[0087] 4. Through the exhaust duct installed above the drying parts, the pungent gas generated during drying is discharged to improve the workshop environment;

[0088] 5. By setting the valve plate in the exhaust duct, the size of the exhaust port can be adjusted according to the needs, the power of the negative pressure fan can be reduced, and the energy consumption and electricity cost of the enterprise can be reduced;

[0089] 6. The deviation-correcting components can be used to prevent the PET film from deviating during transportation, ensuring that the PET film can be aligned and fitted, thereby improving the yield rate of the produced packaging bags.

[0090] 7. Reliable structure, simple and convenient operation and low cost of use.

[0091] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A gluing and drying integrated machine for producing PET polyester film for packaging bags, comprising: A glue coating unit, comprising a glue tank containing glue liquid and a glue coating roller, wherein the glue coating roller is immersed in the glue liquid from the bottom, and the PET polyester film passes over the glue coating roller; A drying unit, comprising a drying component; The conveying unit includes a conveying roller, a conveying frame, a tension roller, and an output roller, wherein the conveying roller is arranged above the glue coating roller, and the PET polyester film is wound around the conveying roller, and the tension is adjusted by the tension roller, and finally extends from the tension roller to the output roller and is wound around the output roller. Features: The glue tank is provided with a liquid outlet, and a screen is intercepted on the liquid outlet; The glue coating unit further comprises a liquid receiving barrel, a circulation component, an overflow pipeline, and an auxiliary roller, wherein the circulation component connects the liquid receiving barrel and the glue tank, and when the glue in the glue tank flows into the liquid receiving barrel from the liquid outlet, the circulation component re-introduces the glue in the liquid receiving barrel into the glue tank, the overflow pipeline is arranged in the glue tank and is connected to the liquid receiving barrel, the auxiliary roller is arranged on the side where the glue is turned out from the lower part of the glue coating roller, and a mesh pattern is formed on the outer periphery of the auxiliary roller; the overflow pipeline extends upward from the bottom of the glue tank, wherein the overflow port of the overflow pipeline is located between the bottom of the glue coating roller and the top of the glue tank; the circulation component comprises a circulation pump, and a pipeline, the circulation pump is arranged in the liquid receiving barrel, and the pipeline is connected to the circulation pump from one end and is connected to the glue tank from the other end; The gluing and drying machine further comprises an exhaust unit, which comprises an exhaust duct located above the drying component, a valve plate member arranged in the exhaust duct and capable of adjusting the size of the exhaust port, and a negative pressure fan connected to the exhaust duct, wherein the valve plate member comprises a valve plate flipped and arranged in the exhaust channel, and the exhaust port is formed between the edge of the valve plate and the inner wall of the exhaust duct; The conveying unit also includes a first correcting component, a second correcting component, and a locking component, wherein the first correcting component and the second correcting component are respectively arranged on both sides of the PET polyester film, and the first correcting component and the second correcting component are synchronously flipped and arranged on the conveying frame, and the locking component locks the first correcting component and the second correcting component relative to the conveying frame.

2. The integrated gluing and drying machine for PET polyester film for producing packaging bags according to claim 1, characterized in that: The overflow pipeline is connected with the liquid receiving bucket from the lower end, and the connecting point is higher than the liquid level of the glue in the liquid receiving bucket.

3. The integrated gluing and drying machine for PET polyester film for producing packaging bags according to claim 1, characterized in that: The valve plate is square, and the distance between the valve plate and the inner wall of the exhaust duct from its two opposite sides is adjustable, a gap is formed between the other two opposite sides and the inner wall of the exhaust duct, or the other two opposite sides abut against the inner wall of the exhaust duct.

4. The integrated gluing and drying machine for PET polyester film for producing packaging bags according to claim 3, characterized in that: The valve plate member also includes a rotating shaft, which crosses the exhaust duct and is fixedly connected to the valve plate, and the valve plate is arranged to be turned upside down around the rotating shaft.

5. The integrated gluing and drying machine for PET polyester film used for producing packaging bags according to claim 4, characterized in that: The exhaust unit also includes an adjusting component, and the adjusting component drives the rotating shaft to rotate around its center line.

6. The integrated gluing and drying machine for PET polyester film used for producing packaging bags according to claim 1, characterized in that: The conveying rack includes a first side plate and a second side plate respectively arranged on both sides of the PET polyester film, and the first correcting component and the second correcting component are respectively fixed on the first side plate and the second side plate by the locking component, and are symmetrically arranged about the center line of the length direction of the PET polyester film.

7. The integrated gluing and drying machine for PET polyester film used for producing packaging bags according to claim 6, characterized in that: The transmission unit further comprises a synchronization shaft which crosses the first side plate and the second side plate, and the first deviation-correcting component and the second deviation-correcting component are respectively connected to two ends of the synchronization shaft and are synchronously flipped around the synchronization shaft.

8. The integrated gluing and drying machine for producing PET polyester film for packaging bags according to claim 7, characterized in that: The first side plate and the second side plate are respectively formed with a first adjustment groove and a second adjustment groove, wherein the first adjustment groove and the second adjustment groove are symmetrically arranged about the center line of the length direction of the PET polyester film, and the synchronization axis passes through the first adjustment groove and the second adjustment groove from both ends respectively, and is translated along the extension direction of the first adjustment groove and the second adjustment groove.

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