Drying device for packaging web production

Abstract

The utility model relates to drying device technical field, the utility model provides drying device for packing coiled material production for the moist coiled material drying, including drying box, a plurality of guide rollers are arranged at intervals in drying box, drying box is used for the coiled material around setting to convey the coiled material of waiting drying, the blow -dryer has a plurality of, a plurality of blow -dryer all are arranged on the inner wall of drying box, the blow -dryer and guide roller one -to -one correspond, a plurality of blow -dry holes are arranged at intervals on the lateral wall of blow -dryer along its axial direction, and the blow -dry hole all are towards the coiled material on corresponding guide roller, and the blow -dryer is used for the dry gas and / or dry hot air of blowing to the coiled material. The technical problem that drying device is not uniform to coiled material drying in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of roll drying equipment, specifically to a drying equipment for packaging roll production. Background Technology

[0002] In the packaging industry, plastic film rolls are the base material for producing various packaging products. During production, they require initial wetting followed by drying. Currently, the industry uses micro-mist generators to spray and wet the rolls, specifically by uniformly wetting the surface of the film rolls with atomized micro-water mist. However, the moisture adhering to the surface of the film rolls after micro-mist spraying is in the form of dispersed small droplets. If drying is not timely or uniform, these small droplets can easily form water stains on the roll surface, and residual moisture can still cause the rolls to stick together, affecting subsequent printing or lamination processes.

[0003] Currently, the drying equipment used in the production of plastic film rolls is still mostly the traditional tunnel-type structure. It maintains a high-temperature environment by heating pipes or overall hot air circulation in the drying box, allowing the film roll to pass through at a uniform speed to achieve drying. However, the drying uniformity of traditional equipment is insufficient. After micro-mist wetting, the moisture distribution on the surface of the roll is more refined, and the hot air of traditional equipment is difficult to accurately act on different areas of the roll. This can easily lead to rapid evaporation of local moisture, causing the roll to become brittle, or local moisture residue forming water stains, which seriously affects the product qualification rate. Utility Model Content

[0004] To overcome the above-mentioned defects, embodiments of this utility model provide a drying device for packaging roll production, which solves the technical problem of uneven drying of rolls in the prior art.

[0005] According to one aspect, at least one embodiment of the present invention provides a drying apparatus for packaging roll production, used to dry moist rolls, comprising: A drying box, wherein a number of guide rollers are arranged at intervals inside the drying box, and the drying box is used for winding the roll material to convey the roll material to be dried; A plurality of blowers are provided, each blower being disposed on the inner wall of the drying chamber. Each blower corresponds to a guide roller. A plurality of air holes are spaced apart along the axial direction on the side wall of each blower, and the air holes are all facing the roll material on the corresponding guide roller. The blowers are used to spray drying gas and / or hot air onto the roll material.

[0006] Optionally, a partition is vertically arranged inside the drying chamber, which divides the drying chamber into a preliminary drying chamber and a secondary drying chamber. A conveying channel is formed between the top surface of the partition and the top wall of the drying chamber. The conveying channel is used to connect the preliminary drying chamber and the secondary drying chamber. Several guide rollers and the blower are respectively arranged in the preliminary drying chamber and the secondary drying chamber. The conveying channel is also used to pass through the pre-dried roll material.

[0007] Optionally, the top of the drying chamber is equipped with two blowers, which respectively supply air to the primary drying chamber and the secondary drying chamber.

[0008] Optionally, the outer wall of the drying chamber is provided with two sets of diversion pipes, each of which is connected to one of the blowers. One set of diversion pipes is connected to all the blowers in the primary drying chamber, and the other set of diversion pipes is connected to all the blowers in the secondary drying chamber.

[0009] Optionally, the top of the drying chamber is provided with several exhaust holes, one of which is connected to the secondary drying chamber, and the remaining exhaust holes are connected to the primary drying chamber.

[0010] Optionally, the top of the drying chamber has a first air outlet, which is connected to the re-drying chamber; The drying chamber is also equipped with a first air supply pipe. One end of the first air supply pipe is connected to the first air outlet, and the other end of the first air supply pipe is connected to the air inlet of the blower located on the re-drying chamber. The first air supply pipe can transport a portion of the hot air in the re-drying chamber to the blower so that the hot air can be reused.

[0011] Optionally, the diameter of the end of the first air supply pipe near the blower is smaller than the diameter of the blower's air inlet, and an annular air inlet channel is formed between the inner wall of the blower's air inlet and the outer wall of the first air supply pipe, the annular air inlet channel being used to absorb external dry gas.

[0012] Optional, also includes: The second air supply pipe has one end connected to the exhaust port on the secondary drying chamber and the other end connected to the air inlet of the blower located on the primary drying chamber.

[0013] Optionally, the bottom of the two side walls of the drying chamber are respectively provided with an inlet and an outlet for the roll material to enter and exit.

[0014] Optionally, a filter screen is provided at the air inlet of the blower.

[0015] The beneficial effects of this utility model are as follows: In this invention, during operation, the rolled material, after being treated with a micro-mist humidification process, is first introduced into the drying chamber and wound around each guide roller according to a preset path. The rolled material conveying system is then activated, causing the rolled material to move at a uniform speed along the arrangement direction of the guide rollers within the drying chamber. Simultaneously, drying gas or hot air is introduced into the air blower. The airflow is ejected through multiple air blowers on the side wall of the air blower. Because the air blowers are directed towards the rolled material on the guide rollers, the ejected airflow can act evenly on the surface of the rolled material. As the rolled material continues to move, the rolled material in each area will sequentially pass through the airflow action area of ​​the corresponding air blower, achieving continuous drying of the moisture on the surface of the rolled material.

[0016] This device, through air blowers corresponding to the guide rollers and air holes precisely oriented towards the roll material, ensures that the drying airflow accurately targets all areas of the roll material. This effectively solves the problems of uneven drying and inaccurate hot air coverage found in traditional devices. It also prevents the roll material from becoming brittle due to rapid localized moisture evaporation and avoids water stains caused by residual moisture, significantly improving product yield. Simultaneously, the roll material remains flat as it moves on the guide rollers, reducing wrinkles during the drying process and further guaranteeing product quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the internal structure of the drying device in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the drying device in the embodiment; Figure 3 for Figure 2 A magnified view of a portion at point A in the embodiment; Figure 4 for Figure 3 A schematic diagram of the structure on the back side of the drying device in the embodiment; Figure 5 for Figure 4 A magnified view of part B in the embodiment.

[0019] In the diagram: 1. Roll material, 2. Drying box, 201. Feed inlet, 202. Discharge outlet, 21. Preliminary drying chamber, 22. Secondary drying chamber, 23. Conveying channel, 24. Exhaust vent, 25. First air outlet, 3. Guide roller, 4. Air blower, 401. Air blower hole, 5. Partition plate, 6. Blower, 61. Air inlet, 62. Filter screen, 7. Diversion pipe, 8. First air supply pipe, 9. Second air supply pipe. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0021] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1-5 The diagram illustrates a drying device for producing packaging roll 1 according to an embodiment of the present invention. This device dries the moistened roll 1 and includes a drying chamber 2 and several air blowers 4. The drying chamber 2 serves as a single drying container, with multiple guide rollers 3 installed at intervals inside. These guide rollers 3 are freely rotatable, and their installation positions are designed to allow the moistened roll 1 to be wound around them along a preset path, achieving stable transport of the roll 1 within the drying chamber 2. The number of air blowers 4 is the same as the number of guide rollers 3, all fixed to the inner wall of the drying chamber 2, with each air blower 4 precisely corresponding to one guide roller 3. On the side wall of each air blower 4, multiple air holes 401 are evenly spaced along its axial direction. The orientation of all air holes 401 is adjusted to directly correspond to the surface of the roll 1 wound on the guide roller 3. The air blower 4 can be connected to a supply source of drying gas or hot air for spraying airflow onto the surface of the roll 1.

[0027] In some examples, during operation, the roll material 1, after being treated with micro-mist moistening, is first introduced into the drying chamber 2 and wound around each guide roller 3 according to a preset path. The roll material 1 conveying system is then started, causing the roll material 1 to move at a uniform speed along the arrangement direction of the guide rollers 3 within the drying chamber 2. Simultaneously, drying gas or hot air is introduced into the air blower 4. The airflow is ejected through multiple air blowing holes 401 on the side wall of the air blower 4. Since the air blowing holes 401 are facing the roll material 1 on the guide rollers 3, the ejected airflow can act evenly on the surface of the roll material 1. During the continuous movement of the roll material 1, the roll material 1 in each area will sequentially pass through the airflow action area of ​​the corresponding air blower 4, achieving continuous drying of the surface moisture of the roll material 1.

[0028] This device, through air blowers 4 corresponding one-to-one with guide rollers 3 and air holes 401 precisely oriented towards the roll material 1, enables the drying airflow to accurately act on each area of ​​the roll material 1. This effectively solves the problems of traditional devices where hot air is difficult to cover precisely and drying is uneven. It avoids the embrittlement of the roll material 1 caused by rapid evaporation of local moisture and the formation of water stains due to local moisture residue, significantly improving the product qualification rate. At the same time, the roll material 1 remains flat as it moves on the guide rollers 3, reducing the formation of wrinkles in the roll material 1 during the drying process and further ensuring product quality.

[0029] like Figure 1 As shown, a partition 5 is vertically fixed inside the drying chamber 2. The height of the partition 5 is lower than the internal height of the drying chamber 2, so that a conveying channel 23 is formed between the top surface of the partition 5 and the inner top wall of the drying chamber 2. This conveying channel 23 divides the internal space of the drying chamber 2 into a preliminary drying chamber 21 on the left and a secondary drying chamber 22 on the right. Several guide rollers 3 and blowers 4 are provided in the preliminary drying chamber 21 and the secondary drying chamber 22, and the guide rollers 3 in the two chambers are arranged in a coordinated direction to ensure that the roll material 1 can enter from the feed end of the preliminary drying chamber 21, complete the preliminary drying by the guide rollers 3 in the preliminary drying chamber 21, enter the secondary drying chamber 22 through the conveying channel 23, complete the secondary drying by the guide rollers 3 in the secondary drying chamber 22, and finally be sent out from the discharge end of the secondary drying chamber 22.

[0030] In some examples, the wet roll 1 first enters the preliminary drying chamber 21 from the feed side of the drying chamber 2, and is wound around the guide roller 3 inside the preliminary drying chamber 21. Under the action of the drying airflow sprayed by the blower 4 inside the preliminary drying chamber 21, most of the dispersed small droplets on the surface of the roll 1 are quickly removed, completing the preliminary drying. Subsequently, guided by the guide roller 3, the roll 1 enters the re-drying chamber 22 through the conveying channel 23 between the top surface of the partition 5 and the inner top wall of the drying chamber 2, and is wound around the guide roller 3 inside the re-drying chamber 22. The blower 4 inside the re-drying chamber 22 continuously sprays drying airflow onto the roll 1, deeply drying the small amount of residual moisture on the surface of the roll 1, ensuring that the moisture on the surface of the roll 1 is completely removed. Finally, the dried roll 1 is sent out from the discharge side of the re-drying chamber 22.

[0031] The drying chamber 2 is divided into a preliminary drying chamber 21 and a secondary drying chamber 22 by a partition 5, achieving segmented drying of the roll material 1. The preliminary drying stage can quickly remove most of the moisture from the surface of the roll material 1, avoiding the accumulation of a large amount of moisture in a single drying area, which would lead to low drying efficiency. The secondary drying stage can further treat the residual moisture, further improving the drying effect and effectively preventing water stains. At the same time, the segmented drying allows for flexible adjustment of the airflow parameters (such as temperature and wind speed) of the blowers 4 in each chamber according to the difference in moisture content of the roll material 1 in the two chambers, improving the targeting and efficiency of drying. Compared with the traditional single drying area, both drying quality and efficiency are significantly improved.

[0032] like Figures 1-2As shown, two blowers 6 are fixedly installed on the top surface of the drying chamber 2, located directly above the primary drying chamber 21 and the secondary drying chamber 22, respectively. The outlet of one blower 6 is connected to the interior of the primary drying chamber 21 via a pipe, supplying dry air into the primary drying chamber 21; the outlet of the other blower 6 is connected to the interior of the secondary drying chamber 22 via a pipe, supplying dry air into the secondary drying chamber 22. The power of the blowers 6 can be adjusted according to the drying requirements to control the airflow and velocity supplied to the two chambers.

[0033] In some examples, after the device is started, both blowers 6 begin working simultaneously. The blower 6 located above the preliminary drying chamber 21 continuously supplies dry air into the preliminary drying chamber 21. The air flows within the preliminary drying chamber 21, working in conjunction with the air blower 4 inside the chamber to perform preliminary drying of the roll material 1. The blower 6 located above the secondary drying chamber 22 continuously supplies dry air into the secondary drying chamber 22, providing a stable airflow source for the secondary drying chamber 22 and assisting the air blower 4 inside the chamber in performing deep drying of the roll material 1. During the drying process, the power of the two blowers 6 can be adjusted according to the actual drying condition of the roll material 1. For example, when the preliminary drying chamber 21 requires a stronger airflow to quickly remove a large amount of moisture, the power of the corresponding blower 6 can be increased. When the secondary drying chamber 22 requires a gentle airflow to prevent the roll material 1 from becoming brittle, the power of the corresponding blower 6 can be appropriately reduced.

[0034] Two blowers 6 are installed at the top of the drying chamber 2, supplying air to the primary drying chamber 21 and the secondary drying chamber 22 respectively. Compared to a single blower 6 supplying air to the entire drying chamber 2, this structure can control the airflow intensity and stability within each drying chamber, avoiding uneven airflow distribution within the chamber. Simultaneously, the independent blowers 6 can flexibly adjust the airflow parameters according to the different needs of the two drying stages, further improving drying uniformity and efficiency, and reducing drying defects caused by unstable airflow.

[0035] like Figure 4 As shown, two sets of diversion pipes 7 are fixedly installed on the outer wall of the drying chamber 2. Each set of diversion pipes 7 consists of a main pipe and several branch pipes. One end of the main pipe of one set of diversion pipes 7 is connected to the air outlet of the blower 6 that supplies air to the primary drying chamber 21, and the other end of the main pipe extends to the outer wall of the primary drying chamber 21, and then connects to the air inlet of each blower 4 in the primary drying chamber 21 through several branch pipes. One end of the main pipe of the other set of diversion pipes 7 is connected to the air outlet of the blower 6 that supplies air to the secondary drying chamber 22, and the other end of the main pipe extends to the outer wall of the secondary drying chamber 22, and its branch pipes are connected to the air inlet of each blower 4 in the secondary drying chamber 22. The diameter of the diversion pipes 7 is designed according to the number of blowers 4 and the required airflow to ensure that each blower 4 receives a uniform airflow supply.

[0036] In some examples, when the two blowers 6 are started, the airflow generated by the blowers 6 supplying air to the primary drying chamber 21 first enters the main pipe of the corresponding branch pipe 7, then is distributed to various branch pipes through the main pipe, and then delivered to each blower 4 in the primary drying chamber 21 through the branch pipes, and finally sprayed out from the blow holes 401 of the blower 4 to act on the roll material 1; similarly, the airflow generated by the blowers 6 supplying air to the secondary drying chamber 22 is precisely delivered to each blower 4 in the secondary drying chamber 22 through the main pipe and branch pipes of another group of branch pipes 7, realizing airflow drying of the roll material 1 in the secondary drying chamber 22. During operation, the branch pipes 7 can ensure that each blower 4 receives a stable and uniform airflow, avoiding the problem of poor drying effect of some blower 4 due to uneven airflow distribution.

[0037] The diversion pipe 7 enables precise distribution of airflow from the blower 6 to each blower duct 4, ensuring that each blower duct 4 receives sufficient and uniform airflow. This further improves the uniformity of airflow acting on the surface of the roll material 1, avoiding the problem of incomplete drying caused by insufficient airflow in some areas, as seen in traditional devices. Simultaneously, by concentrating the airflow to the blower duct 4 through the diversion pipe 7, the irregular diffusion of airflow within the drying chamber is reduced, improving airflow utilization and lowering energy consumption.

[0038] like Figure 1 As shown, the top of the drying chamber 2 is provided with several exhaust holes 24, one of which is connected to the secondary drying chamber 22, and the remaining exhaust holes 24 are connected to the primary drying chamber 21.

[0039] In some examples, during the operation of the device, when the blower 4 in the preliminary drying chamber 21 performs preliminary drying on the roll material 1, the moisture on the surface of the roll material 1 evaporates, forming moisture. This moisture flows upward under the influence of the airflow within the chamber and is discharged outside the drying chamber 2 through multiple exhaust holes 24 corresponding to the top of the preliminary drying chamber 21. When the blower 4 in the secondary drying chamber 22 performs deep drying on the roll material 1, the small amount of residual moisture generated is discharged through a single exhaust hole 24 connected to the secondary drying chamber 22 under the influence of the airflow within the chamber. The exhaust hole 24 continuously discharges moisture, maintaining a low humidity environment inside the drying chamber 2, providing favorable conditions for the subsequent drying of the roll material 1.

[0040] By providing exhaust vents 24 at the top of the drying chamber 2, which are connected to the primary drying chamber 21 and the secondary drying chamber 22 respectively, timely and independent discharge of moisture from the two drying chambers is achieved, avoiding the problem of moisture accumulation in the drying chambers leading to a decrease in drying efficiency. The primary drying chamber 21 generates more moisture, so multiple exhaust vents 24 are provided to ensure rapid moisture discharge; the secondary drying chamber 22 generates less moisture, so a single exhaust vent 24 is sufficient to meet the discharge requirements.

[0041] like Figure 1 As shown, the top of the drying chamber 2 has a first air outlet 25, which is connected to the re-drying chamber 22. The drying chamber 2 is also provided with a first air supply pipe 8. One end of the first air supply pipe 8 is connected to the first air outlet 25, and the other end of the first air supply pipe 8 is connected to the air inlet 61 of the blower 6 located on the re-drying chamber 22. The first air supply pipe 8 can transport a part of the hot air in the re-drying chamber 22 to the blower 6 so that the hot air can be reused.

[0042] In some examples, during operation, the blower 4 inside the re-drying chamber 22 generates a hot airflow during the drying of the roll 1. Part of this hot air is used to dry the roll 1, while the other part enters the first air supply pipe 8 through the first air outlet 25. Guided by the first air supply pipe 8, the hot air is transported to the air inlet 61 of the blower 6 that supplies air to the re-drying chamber 22. The blower 6 mixes the outside air with the recovered hot air and then delivers it back into the re-drying chamber 22 for drying the roll 1. By adjusting the valve on the first air supply pipe 8, the amount of recovered hot air can be controlled to ensure that the temperature of the mixed airflow meets the requirements for re-drying.

[0043] The first air supply duct 8 enables the recovery and reuse of hot air within the re-drying chamber 22. Compared to directly expelling the hot air, the recovered hot air can preheat the air supplied by the blower 6, reducing the heating energy required for the blower 6 to deliver air and significantly lowering the energy consumption of the device. Simultaneously, the stable temperature of the recovered hot air allows the airflow temperature within the re-drying chamber 22 to remain within a more stable range, avoiding instability in drying quality caused by airflow temperature fluctuations and further improving the consistency of drying effect and product quality.

[0044] like Figure 5 As shown, the diameter of the first air supply pipe 8 at the end near the blower 6 is smaller than the diameter of the air inlet 61 of the blower 6. An annular air inlet channel is formed between the inner wall of the air inlet 61 of the blower 6 and the outer wall of the first air supply pipe 8. The annular air inlet channel is used to absorb dry gas from the outside.

[0045] In some examples, when blower 6 is operating, on the one hand, the recovered hot air in the first air supply duct 8 enters the blower 6 through its port; on the other hand, due to the suction effect of blower 6, external dry air is drawn into blower 6 through the annular air inlet channel between the outer wall of the first air supply duct 8 and the inner wall of the blower 6's air inlet 61. After the recovered hot air and external dry air are fully mixed inside blower 6, a mixed airflow with suitable temperature and humidity is formed, which is then delivered by blower 6 to the secondary drying chamber 22 for drying the roll material 1. The amount of external dry air drawn in through the annular air inlet channel can be adjusted according to actual needs to ensure that the parameters of the mixed airflow meet the drying requirements.

[0046] The annular air inlet channel allows the blower 6 to simultaneously recover and utilize hot air while drawing in dry external gas, avoiding the problems of increased air humidity or excessive temperature that might occur with simply recovering hot air. This mixed airflow utilizes the heat from the hot air, reducing energy consumption, and also regulates the humidity and temperature of the airflow through the external dry gas, ensuring that the airflow parameters entering the re-drying chamber 22 always meet the optimal drying conditions for the roll material 1. This further improves the drying quality and avoids problems such as incomplete drying due to excessive air humidity or embrittlement of the roll material 1 due to excessive temperature. Furthermore, this structure eliminates the need for a complex gas mixing device, resulting in a simple structure, low cost, and high practicality.

[0047] like Figure 4 As shown, it also includes a second air supply pipe 9. One end of the second air supply pipe 9 is connected to the exhaust hole 24 on the secondary drying chamber 22, and the other end of the second air supply pipe 9 is connected to the air inlet 61 of the blower 6 located on the primary drying chamber 21.

[0048] In some examples, during the operation of the device, some of the hot air generated in the re-drying chamber 22 is discharged through its corresponding exhaust port 24. At this time, the valve on the second air supply pipe 9 is opened, and some hot air enters the second air supply pipe 9. Under the guidance of the second air supply pipe 9, it is transported to the air inlet 61 of the blower 6 that supplies air to the preliminary drying chamber 21. The blower 6 mixes this hot air with the outside air and then delivers it into the preliminary drying chamber 21 for the preliminary drying of the roll material 1. By adjusting the valve on the second air supply pipe 9, the amount of hot air entering the preliminary drying chamber 21 can be controlled to ensure that the airflow temperature and humidity in the preliminary drying chamber 21 meet the requirements for preliminary drying, avoiding excessively high or low temperatures that could affect the drying effect.

[0049] The second air supply duct 9 enables the secondary recovery and reuse of hot air discharged from the exhaust port 24 in the secondary drying chamber 22. This redirects potentially wasted hot air to the drying operation in the primary drying chamber 21, further reducing the overall energy consumption of the device and improving energy utilization efficiency, thus meeting energy conservation and environmental protection requirements. Simultaneously, the recovered hot air provides heat to the primary drying chamber 21, reducing its need for additional heating energy and lowering production costs. Furthermore, the temperature of the mixed airflow entering the primary drying chamber 21 is more stable, improving the uniformity and efficiency of the primary drying process, laying a good foundation for subsequent secondary drying, and further ensuring product quality.

[0050] like Figure 1 As shown, the bottom of the two side walls of the drying box 2 are respectively provided with an inlet 201 and an outlet 202 for the roll material 1 to enter and exit.

[0051] In some examples, before the device is started, the moistened roll material 1 is introduced into the feed inlet 201 at the bottom of the side wall of the drying chamber 2, and wound around the guide roller 3 inside the drying chamber 2 according to a preset path. The other end of the roll material 1 is led out from the discharge outlet 202 at the bottom of the other side wall of the drying chamber 2 and connected to the subsequent roll material 1 winding device. After the device is started, the roll material 1 is continuously fed into the drying chamber 2 from the feed inlet 201 under the drive of the winding device. After being guided by the guide roller 3 and dried by the blower 4, it is continuously sent out from the discharge outlet 202, realizing the continuous drying operation of the roll material 1. During the process of the roll material 1 entering and exiting, the smooth edges of the feed inlet 201 and the discharge outlet 202 protect the surface of the roll material 1 from damage, while the sealing curtain reduces the leakage of the drying airflow inside the drying chamber 2 and the entry of external impurities.

[0052] A filter screen 62 is installed at the air inlet 61 of the blower 6. When the blower 6 is working, outside air first passes through the filter screen 62 at the air inlet 61. Dust, fibers, and other impurities in the air are intercepted and filtered by the filter screen 62. The filtered clean air enters the interior of the blower 6 and is then transported by the blower 6 to the drying chamber for drying the roll material 1. During long-term use of the device, impurities will gradually accumulate on the filter screen 62. When the impurities accumulate to a certain extent, the filter screen 62 can be removed from the air inlet 61 of the blower 6 for cleaning or replacement. After cleaning or replacing the filter screen 62, it can be reinstalled at the air inlet 61 to ensure that the air entering the blower 6 afterwards remains clean.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A drying device for packaging roll production, used to dry moist rolls (1), characterized in that, include: Drying box (2), wherein a number of guide rollers (3) are arranged at intervals inside the drying box (2), and the drying box (2) is used for winding the roll material (1) to transport the roll material (1) to be dried. A blower (4) is provided, and the blower (4) is provided on the inner wall of the drying box (2). The blower (4) corresponds to the guide roller (3) one by one. A plurality of blow holes (401) are provided on the side wall of the blower (4) along its axial direction. The blow holes (401) are all facing the roll material (1) on the corresponding guide roller (3). The blower (4) is used to spray drying gas and / or drying hot air onto the roll material (1).

2. The drying apparatus for packaging roll production according to claim 1, characterized in that, The drying chamber (2) is vertically equipped with a partition (5) inside, which divides the drying chamber (2) into a preliminary drying chamber (21) and a secondary drying chamber (22). A conveying channel (23) is formed between the top surface of the partition (5) and the inner top wall of the drying chamber (2). The conveying channel (23) is used to connect the preliminary drying chamber (21) and the secondary drying chamber (22). Several guide rollers (3) and blowers (4) are respectively arranged in the preliminary drying chamber (21) and the secondary drying chamber (22). The conveying channel (23) is also used to pass through the pre-dried roll material (1).

3. The drying apparatus for packaging roll production according to claim 2, characterized in that, The drying chamber (2) is equipped with two blowers (6) on the top, and the two blowers (6) respectively send air into the primary drying chamber (21) and the secondary drying chamber (22).

4. The drying apparatus for packaging roll production according to claim 3, characterized in that, The drying chamber (2) is provided with two sets of diversion pipes (7) on its outer wall. Each set of diversion pipes (7) is connected to a blower (6). One set of diversion pipes (7) is connected to all the blowers (4) in the primary drying chamber (21), and the other set of diversion pipes (7) is connected to all the blowers (4) in the secondary drying chamber (22).

5. The drying apparatus for packaging roll production according to claim 3, characterized in that, The top of the drying box (2) is provided with several exhaust holes (24), one of which is connected to the secondary drying chamber (22), and the other exhaust holes (24) are connected to the primary drying chamber (21).

6. The drying apparatus for packaging roll production according to claim 3, characterized in that, The drying chamber (2) has a first air outlet (25) at the top, and the first air outlet (25) is connected to the re-drying chamber (22); The drying chamber (2) is also provided with a first air supply pipe (8). One end of the first air supply pipe (8) is connected to the first air outlet (25), and the other end of the first air supply pipe (8) is connected to the air inlet (61) of the blower (6) located on the re-drying chamber (22). The first air supply pipe (8) can transport a part of the hot air in the re-drying chamber (22) to the blower (6) so that the hot air can be reused.

7. The drying apparatus for packaging roll production according to claim 6, characterized in that, The diameter of the first air supply pipe (8) at the end near the blower (6) is smaller than the diameter of the air inlet (61) of the blower (6). An annular air inlet channel is formed between the inner wall of the air inlet (61) of the blower (6) and the outer wall of the first air supply pipe (8). The annular air inlet channel is used to absorb dry gas from the outside.

8. The drying apparatus for packaging roll production according to claim 5, characterized in that, Also includes: The second air supply pipe (9) is connected at one end to the exhaust hole (24) on the re-drying chamber (22) and at the other end to the air inlet (61) of the blower (6) located on the primary drying chamber (21).

9. The drying apparatus for packaging roll production according to claim 1, characterized in that, The bottom of the two side walls of the drying box (2) are respectively provided with an inlet (201) and an outlet (202) for the roll material (1) to enter and exit.

10. The drying apparatus for packaging roll production according to claim 3, characterized in that, A filter screen (62) is provided at the air inlet (61) of the blower (6).

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