PET (Polyethylene Terephthalate) thermal shrinkage film mixing and drying equipment

Abstract

The utility model relates to the technical field of PET thermal shrinkage film production equipment, in particular to PET thermal shrinkage film mixing and drying equipment. The drying device provides the dry airflow for the feeding device, and then the dry airflow takes away the moisture of the to-be-processed raw materials in the feeding device, so that the moisture content of the to-be-processed raw materials provided by the feeding device for the processing equipment meets the expected requirement. In the process that the drying device provides the drying airflow, the circulating device provides power to enable the feeding device and the drying device assembly to form circulating airflow. Air flow which is discharged from the feeding device and carries moisture enters the drying device and then is dried by the drying device, the air flow which carries moisture is dried in the drying device and then is conveyed to the feeding device through the circulating device, and the dried air flow absorbs moisture in raw materials to be processed in the feeding device and then is conveyed to the drying device through the circulating device. And the drying device is used for drying the airflow after absorbing the moisture. And the steps are repeated, and the to-be-processed raw materials are dried in the production process of the heat shrinkage film.

Description

Technical Field

[0001] This application relates to the technical field of PET heat shrinkable film production equipment, and particularly to a PET heat shrinkable film mixing and drying equipment. Background Art

[0002] PET (polyethylene terephthalate) heat shrinkable film is a new type of heat shrinkable packaging material. Due to its characteristics such as easy recycling, non-toxic, odorless, good mechanical properties, and especially meeting environmental protection requirements, it is increasingly widely used as a packaging material.

[0003] PET particles have strong hygroscopicity. If there is too much moisture in PET particles, this moisture may vaporize during the injection molding process, resulting in defects such as bubbles or shrinkage in the products, thus affecting the quality and performance of the products. Therefore, in order to ensure the quality and performance of PET products, it is necessary to fully dry the PET particles before processing.

[0004] It can be seen that how to dry PET particles during the production process of heat shrinkable film is a technical problem to be solved urgently. Summary of the Invention

[0005] A PET heat shrinkable film mixing and drying equipment provided by this application aims to solve the technical problem of how to dry PET particles during the production process of heat shrinkable film in the prior art.

[0006] A PET heat shrinkable film mixing and drying equipment provided by this application includes:

[0007] A feeding device for providing raw materials to be processed to the processing equipment;

[0008] A drying device for providing drying air flow to the feeding device;

[0009] A circulating device for forming a circulating air flow between the feeding device and the drying device;

[0010] Wherein, after the air flow is dried in the drying device, it is transported to the feeding device through the circulating device. After the dried air flow absorbs the moisture in the raw materials to be processed in the feeding device, it is then transported to the drying device through the circulating device, and the drying device dries the air flow after absorbing moisture.

[0011] Optionally, the feeding device includes:

[0012] A loading component for loading the raw materials to be processed;

[0013] A hopper component for replenishing the raw materials to be processed to the loading component.

[0014] Optionally, the loading assembly includes:

[0015] A material receiving bin, which is connected to the hopper assembly;

[0016] A feeding bin, which is used to feed the processing equipment;

[0017] A drying bin, which is arranged between the material receiving bin and the feeding bin;

[0018] Wherein, a first control valve is arranged between the material receiving bin and the drying bin, and a second control valve is arranged between the drying bin and the feeding bin;

[0019] The first control valve is used to control the on-off between the material receiving bin and the drying bin, and the second control valve is used to control the on-off between the drying bin and the feeding bin;

[0020] The circulation device is connected to the drying bin so that the circulating air flow passes through the drying bin.

[0021] Optionally, a first sensor is arranged at the inlet of the material receiving bin, a second sensor is arranged at the outlet of the drying bin, and a third sensor is arranged at the outlet of the feeding bin;

[0022] Wherein, the first sensor, the second sensor and the third sensor are all used to detect the presence or absence of the raw material to be processed.

[0023] Optionally, the drying device includes:

[0024] A drying cylinder assembly, which is provided with a first chamber and a second chamber. The first chamber is loaded with a first absorbent, and the second chamber is loaded with a second absorbent;

[0025] An air inlet assembly, which is rotationally and airtightly connected to the drying cylinder assembly, and the air inlet assembly is provided with an air inlet;

[0026] An air outlet assembly, which is rotationally and airtightly connected to the drying cylinder assembly, and the air outlet assembly is provided with an air outlet;

[0027] A rotating assembly, which is used to drive the drying cylinder assembly to rotate;

[0028] Wherein, the drying device is divided into a drying area and an air supply area. The air inlet corresponds to and is air-connected to one side of the air supply area, and the air outlet corresponds to and is air-connected to the other side of the air supply area;

[0029] During the rotation of the drying cylinder assembly, the first chamber and the second chamber are switched between the drying area and the air supply area.

[0030] Optionally, the drying cylinder assembly is further provided with a third chamber, and a third absorbent is loaded in the third chamber;

[0031] The drying device is further divided into a cooling zone;

[0032] During the rotation of the drying cylinder assembly, the first chamber, the second chamber, and the third chamber are sequentially switched between the drying zone, the cooling zone, and the air supply zone respectively.

[0033] Optionally, the first chamber, the second chamber, and the third chamber are all filled with a honeycomb structure.

[0034] Optionally, the drying zone is provided with a heating assembly, and the heating assembly is used to heat the absorbent in the drying zone so that the moisture in the absorbent in the drying zone evaporates and escapes.

[0035] Optionally, the circulation device includes:

[0036] A wet gas pipeline, which connects the wet gas outlet hole of the feeding device and the wet gas inlet hole of the drying device;

[0037] A dry gas pipeline, which connects the dry gas outlet hole of the drying device and the dry gas inlet hole of the feeding device;

[0038] A power assembly, which is used to provide power for the circulation of the air flow.

[0039] Optionally, the power assembly is arranged on the wet gas pipeline.

[0040] The beneficial effects achieved by this application are as follows: During the production process of the heat shrinkable film, the raw material to be processed is provided to the processing equipment through the feeding device. The drying device provides a drying air flow to the feeding device, and then the moisture of the raw material to be processed in the feeding device is carried away by the drying air flow, so that the water content of the raw material to be processed provided by the feeding device to the processing equipment meets the expected requirements. During the process of the drying device providing the drying air flow, the power is provided by the circulation device to form a circulating air flow between the feeding device and the drying device assembly. The air flow carrying moisture discharged from the feeding device is dried by the drying device after entering the drying device. After the air flow carrying moisture is dried in the drying device, it is transported to the feeding device through the circulation device. After the dried air flow absorbs the moisture in the raw material to be processed in the feeding device, it then reaches the drying device through the circulation device, and the drying device dries the air flow after absorbing moisture. In this way, the raw material to be processed is dried during the production process of the heat shrinkable film. Description of the Drawings

[0041] Figure 1It is a schematic diagram of the principle structure of the PET heat-shrinkable film mixing and drying equipment in the embodiment of the present utility model;

[0042] Figure 2 It is a distribution schematic diagram of the internal compartments of the drying cylinder assembly in the embodiment of the present utility model.

[0043] Main unit symbol description:

[0044] 10. PET heat-shrinkable film mixing and drying equipment; 20. Feeding device; 21. Loading assembly; 211. Material receiving bin; 212. Feeding bin; 213. Drying bin; 214. First control valve; 215. Second control valve; 216. First sensor; 217. Second sensor; 218. Third sensor; 22. Hopper assembly; 30. Drying device; 31. Drying cylinder assembly; 311. First compartment; 312. Second compartment; 313. Third compartment; 32. Air inlet assembly; 321. Air inlet; 33. Air outlet assembly; 331. Air outlet; 34. Rotating assembly; a. Drying area; b. Air supply area; c. Cooling area; 40. Circulation device; 41. Wet gas pipeline; 42. Dry gas pipeline; 43. Power assembly. Detailed implementation manners

[0045] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar units or units with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0046] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0048] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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, an electrical connection, or a connection that allows mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two units or the interaction relationship between two units. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0050] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0051] Please refer to Figures 1 to 2 , in some embodiments of the present application, the present application provides a PET heat shrinkable film mixing and drying device 10, including: a feeding device 20, a drying device 30, and a circulation device 40.

[0052] The feeding device 20 is used to provide raw materials to be processed to a processing device. The drying device 30 is used to provide a drying air flow to the feeding device 20. The circulation device 40 is used to form a circulating air flow between the feeding device 20 and the drying device 30.

[0053] Among them, after the air flow is dried in the drying device 30, it is transported to the feeding device 20 through the circulating device 40. After the dried air flow absorbs the moisture in the raw material to be processed in the feeding device 20, it then reaches the drying device 30 through the circulating device 40, and the drying device 30 dries the air flow after absorbing moisture.

[0054] In the production process of the heat shrinkable film, the raw material to be processed is provided to the processing equipment through the feeding device 20. The drying device 30 provides a drying air flow to the feeding device 20, and then the moisture in the raw material to be processed in the feeding device 20 is carried away by the drying air flow, so that the moisture content of the raw material to be processed provided by the feeding device 20 to the processing equipment meets the expected requirements.

[0055] In the process of the drying device 30 providing the drying air flow, the circulating device 40 provides power to form a circulating air flow between the feeding device 20 and the drying device 30 components. The air flow carrying moisture discharged from the feeding device 20 is dried by the drying device 30 after entering the drying device 30. After the air flow carrying moisture is dried in the drying device 30, it is transported to the feeding device 20 through the circulating device 40. After the dried air flow absorbs the moisture in the raw material to be processed in the feeding device 20, it then reaches the drying device 30 through the circulating device 40, and the drying device 30 dries the air flow after absorbing moisture.

[0056] In this way, the raw material to be processed is dried during the production process of the heat shrinkable film. Among them, the raw material to be processed includes PET particles.

[0057] In some embodiments of the present application, the feeding device 20 includes: a loading component 21 and a hopper component 22. The loading component 21 is used to load the raw material to be processed. The hopper component 22 is used to supplement the raw material to be processed to the loading component 21.

[0058] In the process of the feeding device 20 feeding materials to the processing equipment, the hopper component 22 supplements the raw material to be processed to the loading component 21. The hopper component 22 can store the raw material to be processed. When the loading component 21 is out of materials, the hopper component 22 automatically supplements the raw material to be processed to the loading component 21 to prevent the loading component 21 from continuously feeding materials to the processing equipment. If the hopper component 22 is out of materials, the hopper component 22 is replenished through a conveying pipeline or manually. Since the loading component 21 is loaded with the raw material to be processed, during the process of replenishing the hopper component 22, the continuity of the feeding of the loading component 21 to the processing equipment will not be affected. In this way, the automatic continuous feeding of the feeding device 20 is realized, and the production efficiency is improved.

[0059] In some embodiments of the present application, the loading assembly 21 includes: a receiving bin 211, a feeding bin 212, and a drying bin 213. The receiving bin 211 is connected to the hopper assembly 22. The feeding bin 212 is used to supply materials to the processing equipment. The drying bin 213 is disposed between the receiving bin 211 and the feeding bin 212. Wherein, a first control valve 214 is provided between the receiving bin 211 and the drying bin 213, and a second control valve 215 is provided between the drying bin 213 and the feeding bin 212. The first control valve 214 is used to control the on-off between the receiving bin 211 and the drying bin 213, and the second control valve 215 is used to control the on-off between the drying bin 213 and the feeding bin 212. The circulation device 40 is connected to the drying bin 213 to enable the circulating air flow to pass through the drying bin 213.

[0060] During the process of the loading assembly 21 supplying materials to the processing equipment, the raw materials to be processed entering the loading assembly 21 first enter the receiving bin 211, and then enter the drying bin 213 through the first control valve 214. After the raw materials to be processed enter the drying bin 213, both the first control valve 214 and the second control valve 215 are closed. The circulation device 40 then enables the dry air flow to pass through the drying bin 213 to carry away the moisture of the raw materials to be processed in the drying bin 213 through the dry air flow, thereby achieving the effect of drying the raw materials to be processed. By closing both the first control valve 214 and the second control valve 215, the escape of the drying air flow from the drying bin 213 is avoided. After the raw materials to be processed in the drying bin 213 are dried, the second control valve 215 is opened to enable the dried raw materials to be processed to enter the feeding bin 212. During the process of drying the raw materials to be processed in the drying bin 213, since the first control valve 214 is in the closed state, the raw materials to be processed can be replenished to the receiving bin 211, so that after the raw materials to be processed in the drying bin 213 enter the feeding bin 212, the receiving bin 211 can promptly replenish the raw materials to be processed into the drying bin 213, thereby ensuring the continuity of material supply.

[0061] In some embodiments of the present application, the volume of the feeding bin 212 is larger than the volume of the drying bin 213.

[0062] By making the volume of the feeding bin 212 larger than the volume of the drying bin 213, the drying bin 213 can replenish the dried raw materials to be processed into the feeding bin 212 when there is material in the feeding bin 212, thereby avoiding the lack of materials in the feeding bin 212 and ensuring the continuity of material supply.

[0063] In some embodiments of the present application, a first sensor 216 is provided at the entrance of the receiving bin 211, a second sensor 217 is provided at the exit of the drying bin 213, and a third sensor 218 is provided at the exit of the feeding bin 212. Among them, the first sensor 216, the second sensor 217, and the third sensor 218 are all used to detect the presence or absence of the raw materials to be processed.

[0064] When the first sensor 216 fails to sense the raw material to be processed, it indicates that the hopper assembly 22 is out of material. Then, it controls the external feeding system to automatically replenish the hopper assembly 22 with material, or issues an alarm to prompt the staff to replenish the material manually.

[0065] When the second sensor 217 fails to detect the raw material to be processed, it indicates that the drying chamber 213 is out of material. At this time, the second control valve 215 is closed, and then the first control valve 214 is opened, so that the raw material to be processed in the receiving bin 211 automatically enters the drying chamber 213, thereby realizing automatic replenishment of the drying chamber 213.

[0066] When the third sensor 218 fails to detect the raw material to be processed, it indicates that the feeding bin 212 is out of material. At this time, the first control valve 214 is controlled to close, and the second control valve 215 is opened, so that the dried raw material to be processed enters the feeding bin 212.

[0067] In this way, through the cooperation among the first sensor 216, the second sensor 217, the third sensor 218, the first control valve 214 and the second control valve 215, continuous feeding of the feeding device 20 is realized without affecting the drying of the raw material to be processed.

[0068] In some embodiments of the present application, the drying device 30 includes: a drying cylinder assembly 31, an air inlet assembly 32, an air outlet assembly 33 and a rotating assembly 34. The drying cylinder assembly 31 is provided with a first chamber 311 and a second chamber 312. The first chamber 311 is loaded with a first absorbent, and the second chamber 312 is loaded with a second absorbent. The air inlet assembly 32 is rotationally and airtightly connected to the drying cylinder assembly 31, and the air inlet assembly 32 is provided with an air inlet 321. The air outlet assembly 33 is rotationally and airtightly connected to the drying cylinder assembly 31, and the air outlet assembly 33 is provided with an air outlet 331. The rotating assembly 34 is used to drive the drying cylinder assembly 31 to rotate. Among them, the drying device 30 is divided into a drying area a and a gas supply area b. The air inlet 321 corresponds to and is in gas communication with one side of the gas supply area b, and the air outlet 331 corresponds to and is in gas communication with the other side of the gas supply area b. During the rotation of the drying cylinder assembly 31, the first chamber 311 and the second chamber 312 are switched between the drying area a and the gas supply area b.

[0069] During the operation of the drying device 30, the rotating assembly 34 drives the drying cylinder assembly 31 to rotate relative to the air inlet assembly 32 and the air outlet assembly 33.

[0070] When the first chamber 311 is in the drying zone a, the second chamber 312 is in the air supply zone b. At this time, the high-humidity air flow from the feeding device 20 enters the second chamber 312 from one side of the air supply zone b. After passing through the second absorbent, it is discharged from the other side of the air supply zone b of the second chamber 312. During the process of the high-humidity air flow passing through the second absorbent, the moisture in the air flow is absorbed by the second absorbent, so that the air flow discharged from the other side of the air supply zone b is the dried air flow. During the process of the second absorbent in the second chamber 312 in the air supply zone b absorbing moisture, the first chamber 311 in the drying zone a is in the drying zone a, and the first absorbent in the first chamber 311 is heated in the drying zone a to evaporate and remove the moisture in the first absorbent, thereby reducing the moisture content in the first absorbent and restoring the moisture absorption capacity of the first absorbent.

[0071] When the set time has passed, the rotating assembly 34 drives the drying cylinder assembly 31 to rotate relative to the air inlet assembly 32 and the air outlet assembly 33, so that the first chamber 311 is in the air supply zone b and the first chamber 311 exits the drying zone a. Furthermore, the dehydrated first absorbent can dry the high-humidity air flow in the air supply zone b, and the second absorbent can be dehydrated in the drying zone a to restore the moisture absorption capacity of the second absorbent.

[0072] In this way, the continuous drying of the high-humidity air flow is realized, and then the raw material to be processed in the feeding device 20 is dried by the dried air flow, ensuring the drying effect and the continuity of the drying process.

[0073] In some embodiments of the present application, a heating assembly is provided in the drying zone a. The heating assembly is used to heat the absorbent in the drying zone a to evaporate and remove the moisture in the absorbent in the drying zone a.

[0074] Through heating, the moisture in the absorbent in the drying zone a is evaporated by heat, and then the absorbent in the drying zone a is dehydrated and restored to its moisture absorption capacity.

[0075] In some embodiments of the present application, the drying cylinder assembly 31 is further provided with a third chamber 313, and a third absorbent is loaded in the third chamber 313. The drying device 30 is further divided into a cooling zone c. During the rotation of the drying cylinder assembly 31, the first chamber 311, the second chamber 312, and the third chamber 313 are sequentially switched between the drying zone a, the cooling zone c, and the air supply zone b.

[0076] When the first chamber 311 is in the air supply zone b, the second chamber 312 is in the drying zone a. At this time, the third chamber 313 is in the cooling zone c.

[0077] The first absorbent absorbs moisture in the air supply area b. At the same time, the second absorbent dehydrates in the drying area a to restore its moisture absorption capacity. Since the absorbent restores its moisture absorption capacity by heating and evaporation, the absorbent in the drying area a has a higher temperature. When the second chamber 312 enters the drying area a from the air supply area b, the third chamber 313 enters the cooling area c from the drying area a. The temperature of the third absorbent removed from the drying area a is relatively high. If it directly enters the air supply area b to absorb and dry the circulating air flow, it will cause the temperature of the circulating air flow to be too high, reducing the quality of the raw material to be processed, or even scrapping the raw material to be processed. Therefore, a third chamber 313 is provided in the drying cylinder assembly 31, and a cooling area c is defined in the drying device 30. When the second chamber 312 enters the drying area a from the air supply area b, the third chamber 313 enters the cooling area c from the drying area a, and then the third absorbent after restoring its moisture absorption capacity is cooled in the cooling area c.

[0078] After a set time, the rotating assembly 34 drives the drying cylinder assembly 31 to rotate relative to the air inlet assembly 32 and the air outlet assembly 33, so that the first absorbent that has absorbed moisture in the air supply area b enters the drying area a, the second absorbent that has restored its moisture absorption capacity in the drying area a enters the cooling area c, and the third absorbent that has been cooled in the cooling area c enters the air supply area b. In this way, the cooled third absorbent dries the high-humidity air flow in the air supply area b, the first absorbent that has absorbed moisture dehydrates in the drying area a to restore its moisture absorption capacity, and the second absorbent after high-temperature dehydration is cooled in the cooling area c.

[0079] In this cycle, continuous drying of the high-humidity air flow is achieved, and then the raw material to be processed in the feeding device 20 is dried by the dried air flow, ensuring the drying effect and the continuity of the drying process, and preventing the raw material to be processed from being damaged by high temperature.

[0080] In some embodiments of the present application, the drying temperature in the drying area a is configured to be 120°C - 180°C, the cooling temperature in the cooling area c is configured to be 70°C - 90°C, and the dew point temperature of the dried gas discharged from the air supply area c is configured to be greater than -40°C.

[0081] The absorbent is heated to 120°C - 180°C in the drying area a, so that the moisture in the absorbent can be quickly evaporated, thereby improving the dehydration efficiency and dehydration effect of the absorbent in the drying area a, and further restoring the moisture absorption capacity of the absorbent to the expected state.

[0082] Since PET materials are prone to deformation and melting when heated, if the temperature of the drying air is too high, it will cause a decline in the quality of PET materials or even caking and scrapping. By cooling the absorbent to 70°C - 90°C in the cooling area c, it is possible to avoid too high a temperature of the drying air, so that while maintaining a good moisture absorption effect during the moisture absorption process of the drying air on PET materials, the product quality of PET materials will not be reduced.

[0083] Since the PET material has strong moisture absorption ability and is prone to hydrolysis, the moisture content in the PET material is relatively high. If the moisture content in the PET material is too high, it will lead to too high moisture content in the PET heat-shrinkable film, and then the PET heat-shrinkable film is prone to hydrolysis, resulting in a reduction in the structural strength and product durability of the PET heat-shrinkable film. After the air is dried, the dew point temperature of the dried air is above -40°C, so as to ensure that the moisture absorption ability of the drying meets the expected requirements, ensure the moisture absorption effect of the dried air on the PET material, so that the dried air can effectively reduce the humidity in the PET material, and then improve the structural strength and durability of the PET heat-shrinkable film to meet the expected requirements.

[0084] In some embodiments of the present application, the first chamber 311, the second chamber 312, and the third chamber 313 are all filled with a honeycomb structure.

[0085] By setting the honeycomb structure, the contact area between the absorbent and the air flow is increased, thereby improving the drying efficiency and the dehydration efficiency of the absorbent.

[0086] In some embodiments of the present application, the circulation device 40 includes: a wet gas pipeline 41, a dry gas pipeline 42, and a power component 43. The wet gas pipeline 41 connects the wet gas outlet hole of the feeding device 20 and the wet gas inlet hole of the drying device 30. The dry gas pipeline 42 connects the dry gas outlet hole of the drying device 30 and the dry gas inlet hole of the feeding device 20. The power component 43 is used to provide power for the circulation of the air flow.

[0087] In some embodiments of the present application, the power component 43 is arranged on the wet gas pipeline 41.

[0088] In the description of this specification, the description with reference to terms such as "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0089] In addition, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A PET heat shrink film mixed material drying equipment, characterized in that, include: A feeding device, the feeding device is used to provide the raw materials to be processed to the processing equipment; A drying device, the drying device is used to provide a dry air flow to the feeding device; A circulation device, the circulation device is used to form a circulating airflow between the feeding device and the drying device; Among them, after the airflow is dried in the drying device, it is transported to the feeding device through the circulation device. After the dry airflow absorbs moisture in the raw materials to be processed in the feeding device, it is transported to the drying device through the circulation device. The drying device dries the airflow after absorbing moisture.

2. The PET heat shrink film mixed material drying equipment according to claim 1, characterized in that: The feeding device comprises: A loading component, the loading component is used to load the raw material to be processed; A hopper assembly is used to replenish the raw materials to be processed to the loading assembly.

3. The PET heat shrinkable film mixed material drying equipment according to claim 2, characterized in that: The loading assembly comprises: A material receiving bin, the material receiving bin is connected to the hopper assembly; A feed bin, which is used to feed materials to the processing equipment; A drying bin, the drying bin being arranged between the material receiving bin and the material supply bin; Wherein, a first control valve is provided between the receiving bin and the drying bin, and a second control valve is provided between the drying bin and the feeding bin; The first control valve is used to control the connection and disconnection between the material receiving bin and the drying bin, and the second control valve is used to control the connection and disconnection between the drying bin and the material supply bin; The circulation device is connected to the drying chamber so that the circulating airflow passes through the drying chamber.

4. The PET heat shrink film mixed material drying equipment according to claim 3, characterized in that: The inlet of the receiving bin is provided with a first sensor, the outlet of the drying bin is provided with a second sensor, and the outlet of the feeding bin is provided with a third sensor; The first sensor, the second sensor and the third sensor are all used to detect the presence or absence of raw materials to be processed.

5. The PET heat shrink film mixed material drying equipment according to claim 1, characterized in that: The drying device comprises: A drying cylinder assembly, wherein the drying cylinder assembly is provided with a first chamber and a second chamber, wherein the first chamber is loaded with a first absorbent, and the second chamber is loaded with a second absorbent; An air intake assembly, the air intake assembly is rotatably and airtightly connected to the drying cylinder assembly, and the air intake assembly is provided with an air inlet; An air outlet assembly, the air outlet assembly is rotatably and airtightly connected to the drying cylinder assembly, and the air outlet assembly is provided with an air outlet; A rotating assembly, the rotating assembly is used to drive the drying cylinder assembly to rotate; Wherein, the drying device is divided into a drying area and an air supply area, the air inlet corresponds to one side of the air supply area and is in gas communication with each other, and the air outlet corresponds to the other side of the air supply area and is in gas communication with each other; During the rotation of the drying cylinder assembly, the first chamber and the second chamber are switched between the drying area and the air supply area.

6. The PET heat shrink film mixed material drying equipment according to claim 5, characterized in that: The drying cylinder assembly is also provided with a third compartment, and a third absorbent is loaded in the third compartment; The drying device is also divided into a cooling zone; During the rotation of the drying cylinder assembly, the first chamber, the second chamber and the third chamber are switched in sequence between the drying zone, the cooling zone and the air supply zone respectively.

7. The PET heat shrink film mixed material drying equipment according to claim 6, characterized in that: The first chamber, the second chamber and the third chamber are all filled with a honeycomb structure.

8. The PET heat shrink film mixed material drying equipment according to claim 6, characterized in that: The drying zone is provided with a heating component, and the heating component is used to heat the absorbent in the drying zone so that the water in the absorbent in the drying zone evaporates and escapes.

9. The PET heat shrink film mixed material drying equipment according to claim 1, characterized in that: The circulation device comprises: A moisture pipeline, the moisture pipeline connecting the moisture outlet of the feeding device and the moisture inlet of the drying device; A dry gas pipeline, the dry gas pipeline connecting the dry gas outlet of the drying device and the dry gas inlet of the feeding device; A power assembly is used to provide power for the circulation of airflow.

10. The PET heat shrink film mixed material drying equipment according to claim 9, characterized in that: The power assembly is arranged on the wet gas pipeline.

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