A raw material drying device for processing plastic wrap

Abstract

This invention relates to the field of food preservation film technology and discloses a raw material drying device for food preservation film processing, comprising: a drying cabinet and a functional box disposed in the drying cabinet, and further comprising: a support component fixed inside the drying cabinet; a vibrating tray fixed above the support component; a drying component fixed above the vibrating tray and below inside the drying cabinet; and a heat circulation component fixed on the functional box. This invention uses high-frequency vibration generated by an ultrasonic oscillator to synchronously throw the raw material in the vibrating tray up and down, causing the raw material to briefly remain suspended in the air when it rises to its highest point. The control module captures the vibration signal of the ultrasonic oscillator in real time through a vibration phase detection algorithm, and combines this with the vibration piston position data fed back by the displacement sensor on the guide column to precisely control the timing of opening and closing the hot air channel. When the raw material is thrown into the air and remains suspended, the control module immediately triggers the opening of the hot air channel, and the hot air flows out through the hot air outlet pipe from the jet hole, directly acting on the suspended raw material.

Description

Technical Field

[0001] This invention relates to the field of food preservation film technology, and more specifically to a raw material drying device for food preservation film processing. Background Technology

[0002] In the production and processing of plastic wrap, the dryness of the raw materials (such as polyethylene granules) directly affects the quality of the final product. Since plastic wrap raw materials are mostly high-molecular-weight polymer granules, they easily absorb moisture from the air due to changes in ambient humidity during storage and transportation, forming surface-adsorbed water and free water between the particles. If this moisture is not completely removed, it will rapidly vaporize at high temperatures during the subsequent melt extrusion process, leading to defects such as bubbles and pinholes inside the film. In severe cases, it can also cause uneven film thickness and decreased mechanical properties, directly affecting the product qualification rate.

[0003] Traditional raw material drying equipment mostly uses static hot air drying, where raw materials are piled up in trays. The lower layer of raw materials is easily blocked by the upper layer, resulting in uneven heating and insufficient drying. At the same time, the moisture evaporated from the raw materials during the drying process tends to accumulate at the bottom of the tray, keeping the tray in a damp state for a long time. Some dried raw materials will absorb moisture again after coming into contact with the damp tray, further reducing the drying effect. Summary of the Invention

[0004] This invention provides a raw material drying device for processing cling film, which effectively dries the raw materials for cling film.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A raw material drying device for processing plastic wrap includes: a drying cabinet and a functional box disposed in the drying cabinet, and further includes:

[0007] Support components are fixed inside the drying cabinet; vibrating trays are fixed above the support components; drying components are fixed above the vibrating trays and below inside the drying cabinet; heat circulation components are fixed on the function box; and a control module is used to control the movement of the drying components to dry the raw materials as they rise.

[0008] The system comprises: a vibrating support plate fixed to the inner wall of the drying cabinet; a vibrating cylinder fixed to the end of the vibrating support plate away from the drying cabinet; a pad fixed below the vibrating tray; a vibrating upper plate fixed below the pad; a vibrating piston slidably disposed inside the vibrating cylinder; a guide column slidably disposed on the vibrating cylinder, one end fixed to the vibrating upper plate and the other end fixed to the vibrating piston; an ultrasonic oscillator fixed below the vibrating upper plate and located between the lower part of the vibrating upper plate and the upper part of the vibrating cylinder; a vibrating spring fixed at one end inside the vibrating cylinder and the other end fixed to the vibrating piston; a hot air cylinder fixed at the top inside the vibrating cylinder; a hot air pipe slidably disposed at one end inside the hot air cylinder; a hot air spring fixed at one end inside the hot air cylinder and the other end fixed to the hot air pipe; a hot air channel located on the vibrating cylinder; a hot air inlet pipe fixed above the vibrating cylinder; a flexible air tube fixed to the hot air inlet pipe; a hot air outlet pipe fixed at one end below the vibrating cylinder and the other end fixed below the vibrating tray; and an air jet hole located at the bottom inside the vibrating tray and connected to the hot air outlet pipe.

[0009] Furthermore, a sealing rubber ring is fixed below the hot air pipe; and an intercepting mesh plate is fixed to the jet hole.

[0010] Furthermore, the support member includes:

[0011] The support plate is fixed inside the drying cabinet; the telescopic cylinder is fixed on the support plate; the telescopic core rod is slidably inserted into the telescopic cylinder from below; the support plate is fixed above the telescopic core rod; and the support spring is fixed at one end to the support plate and at the other end below the support plate.

[0012] Furthermore, the support member also includes:

[0013] The pressure sensor is fixed above the support plate; the support pad is fixed below the pressure sensor and above the bottom of the vibration tray.

[0014] Furthermore, the thermal cycling component includes:

[0015] The hot air box is fixed inside the functional box; the electric heating element is fixed inside the hot air box; the air filter plate is fixed on the functional box and connected to the hot air box; the temperature sensor is fixed at the air outlet of the hot air box; the turbine fan is fixed inside the functional box; one end of the hot air inlet pipe is fixed to the air outlet of the hot air box, and the other end is fixed to the turbine fan; the hot air delivery pipe is fixed to the turbine fan at the top and extends into the drying cabinet at the bottom; the hot air branch pipe is fixed to both sides of the hot air delivery pipe at one end and to the flexible air pipe at the other end; the flow control valve is fixed to the hot air branch pipe; and the temperature controller is fixed inside the functional box.

[0016] Furthermore, the heat cycle component also includes:

[0017] The dehumidification box is fixed inside the function box; the suction pipe is fixed at one end to the dehumidification box and extends to the drying cabinet at the other end; the exhaust fan is fixed inside the function box and its working end is fixed to the suction pipe; the suction hole is opened at the inner top of the drying cabinet and is connected to the suction pipe; the circulating air duct is fixed at one end to the dehumidification box and at the other end to the hot air box.

[0018] Furthermore, a pad is provided under the drying cabinet, and a double cabinet door is rotatably provided at the front end of the drying cabinet. The double cabinet door is rotatably provided with a locking plate, and the double cabinet door is fixed with a locking groove plate.

[0019] Furthermore, the control module monitors the vibration signal of the ultrasonic oscillator in real time using a vibration phase detection algorithm, extracts key phase points within the vibration cycle, and simultaneously collects real-time position data of the vibrating piston using a displacement sensor integrated into the guide column. A "vibration phase - piston position" spectral correlation model is constructed using Fourier transform. When the ultrasonic oscillator is detected to enter the rising vibration stage, the control module triggers the pneumatic control unit to close the hot gas channel, and the hot gas flow is blocked by the sealing rubber ring between the vibrating piston and the end face of the hot gas pipe. When the ultrasonic oscillator is detected to enter the falling vibration stage, the vibrating piston descends to the bottom and simultaneously triggers the opening of the hot gas channel, allowing the hot gas flow to be ejected through the hot gas outlet pipe and jet hole, ensuring that the hot gas flow injection and the raw material throwing trajectory are phase synchronized.

[0020] Furthermore, the control module processes the initial weight data of the raw materials collected by the pressure sensor based on a fuzzy adaptive PID control algorithm. By establishing a fuzzy rule base, it achieves dynamic matching between ultrasonic power and hot air flow: when the raw material weight is in the low range, the ultrasonic oscillator is controlled to operate at 40% of its rated power, matching the hot air flow with the flow control valve at 30% opening; when the raw material weight is in the middle range, the ultrasonic oscillator power is automatically adjusted to 60%–75% of its rated power, and the hot air temperature is simultaneously increased to 75°C; when the raw material weight is in the high range, the ultrasonic oscillator is controlled to operate at 90% of its rated power, and the flow control valve of the hot air branch pipe is opened and adjusted to 85% opening. By increasing the vibration frequency, the dispersion of the raw material is improved, enhancing the heat and mass transfer efficiency.

[0021] Furthermore, the control module uses a Kalman filter algorithm to denoise the real-time weight data collected by the pressure sensor and combines it with the hot air temperature data from the temperature sensor to construct a state-space model of the drying process: when the weight decay rate drops to 0.3% / min, it is determined that the raw material is close to the drying endpoint, and the PID parameter self-tuning program is automatically started to gradually reduce the power of the ultrasonic oscillator to 30% of the rated power and lower the hot air temperature to 55℃; when the weight decay rate changes by less than 0.05% for 5 consecutive sampling cycles, it is determined that the drying is complete, the ultrasonic oscillator is stopped, the flow control valve is closed, and the exhaust fan is started to run for 12 seconds to remove residual moisture; if the hot air temperature deviation is detected to exceed ±3℃ or the ultrasonic oscillator vibration frequency deviation exceeds 8%, the fuzzy neural network fault diagnosis system is immediately triggered to identify the fault type through feature parameter comparison and execute the corresponding safety protection strategy, while storing the fault code in EEPROM.

[0022] The above-described solution of the present invention has at least the following beneficial effects:

[0023] This invention utilizes high-frequency vibrations generated by an ultrasonic oscillator to synchronously scatter the raw materials within a vibrating tray, creating a brief suspended state when the materials reach their highest point. The control module captures the vibration signal from the ultrasonic oscillator in real time using a vibration phase detection algorithm, combined with vibration piston position data from a displacement sensor on the guide column, to precisely control the opening and closing of the hot air channel. When the raw materials are scattered and suspended in the air, the control module immediately triggers the opening of the hot air channel, allowing hot air to flow directly from the exhaust port through the hot air outlet pipe, directly acting on the suspended raw materials. At this point, the raw materials are completely detached from the vibrating tray, and the hot air can envelop each particle without obstruction, efficiently removing surface and interstitial moisture. Conversely, when the raw materials fall back with the vibration, the control module simultaneously closes the hot air channel, preventing the hot air from directly impacting the bottom of the tray. This control module-led "vibration-hot air" synergistic mechanism not only ensures more thorough contact between the hot air and the raw materials, significantly improving drying efficiency, but also fundamentally prevents moisture accumulation within the vibrating tray, keeping the tray dry and clean at all times. This reduces the risk of secondary moisture absorption by the raw materials due to contact with a damp tray, providing a stable and dry raw material foundation for subsequent processing.

[0024] After the ultrasonic oscillator is activated, its up-and-down vibrations cause the vibrating tray to move synchronously. When vibrating upwards, the upper vibrating plate moves the vibrating piston upwards via the guide rail, blocking the sealing rubber ring of the hot air pipe and obstructing the hot air passage. The hot air cannot be ejected from the jet hole through the hot air outlet pipe. At this time, the hot air pipe retracts into the hot air cylinder and compresses the hot air spring to ensure a proper seal, and the raw material is lifted with the tray. When vibrating downwards, the raw material will briefly linger in the air at its highest point, and the vibrating piston will move downwards with the help of the vibrating spring. The hot air pipe extends out of the hot air cylinder under the action of the hot air spring. After the vibrating piston is no longer blocking, the hot air will sequentially pass through the hot air passage, the hot air cylinder, the hot air pipe, and the hot air outlet pipe before being ejected from the jet hole to dry the raw material in the air. When the vibrating piston moves to the lowest point, the ultrasonic oscillator vibrates upwards again, the vibrating piston re-seals, the raw material falls back onto the tray, and the hot air stops being ejected. This cycle repeats continuously. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the drying cabinet structure of a raw material drying device for processing cling film provided in an embodiment of the present invention;

[0026] Figure 2 A raw material drying device for processing cling film is provided in an embodiment of the present invention. Figure 1 Enlarged view of point A;

[0027] Figure 3 A raw material drying device for processing cling film is provided in an embodiment of the present invention. Figure 1 Enlarged view of point B;

[0028] Figure 4 This is a schematic diagram of the overall structure of a raw material drying device for processing cling film provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the hot air delivery pipe structure of a raw material drying device for processing cling film provided in an embodiment of the present invention;

[0030] Figure 6 A raw material drying device for processing cling film is provided in an embodiment of the present invention. Figure 5 Enlarged view of point C;

[0031] Figure 7 This is a schematic diagram of the pressure sensor structure of a raw material drying device for processing cling film provided in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the hot air inlet pipe structure of a raw material drying device for processing cling film provided in an embodiment of the present invention;

[0033] Figure 9 A raw material drying device for processing cling film is provided in an embodiment of the present invention. Figure 8Enlarged view of point D;

[0034] Figure 10 A cross-sectional view of the vibrating cylinder of a raw material drying device for processing cling film provided in an embodiment of the present invention;

[0035] Figure 11 A flowchart of the control module of a raw material drying device for processing cling film provided in an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] In the diagram: 1. Drying cabinet; 101. Pad block; 102. Double cabinet door; 103. Locking plate; 104. Locking groove plate; 2. Functional box; 3. Support components; 301. Support plate; 302. Telescopic cylinder; 303. Telescopic core rod; 304. Support plate; 305. Support spring; 306. Pressure sensor; 307. Support pad; 4. Vibrating tray; 5. Drying components; 501. Vibrating support plate; 502. Vibrating cylinder; 503. Pad column; 504. Vibrating upper plate; 505. Vibrating piston; 506. Guide column; 507. Ultrasonic oscillator; 508. Vibrating spring; 509. Hot air cylinder; 5010. Hot air pipe; 5011. 5012. Hot air spring; 5013. Hot air inlet pipe; 5014. Flexible air pipe; 5015. Hot air outlet pipe; 5016. Jet nozzle; 5017. Sealing rubber ring; 5018. Interception mesh plate; 6. Heat circulation components; 601. Hot air box; 602. Electric heating element; 603. Air filter plate; 604. Temperature sensor; 605. Turbine fan; 606. Hot air inlet pipe; 607. Hot air delivery pipe; 608. Hot air branch pipe; 609. Flow control valve; 6010. Thermostat; 6011. Dehumidification box; 6012. Suction pipe; 6013. Exhaust fan; 6014. Suction hole; 6015. Circulating air duct. Detailed Implementation

[0038] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0039] like Figures 1 to 10As shown, an embodiment of the present invention provides a raw material drying device for processing cling film, including: a drying cabinet 1 and a functional box 2 disposed in the drying cabinet 1, and further including: a support 3 fixed inside the drying cabinet 1; a vibrating tray 4 fixed above the support 3; a drying component 5 fixed above the vibrating tray 4 and below inside the drying cabinet 1; a heat circulation component 6 fixed on the functional box 2; and a control module for controlling the movement state of the drying component 5 to dry the raw material when it rises.

[0040] A vibrating support plate 501 is fixed to the inner wall of the drying cabinet 1; a vibrating cylinder 502 is fixed to the end of the vibrating support plate 501 away from the end connected to the drying cabinet 1; a pad column 503 is fixed below the vibrating tray 4; a vibrating upper plate 504 is fixed below the pad column 503; a vibrating piston 505 is slidably disposed inside the vibrating cylinder 502; a guide column 506 is slidably disposed on the vibrating cylinder 502, with one end fixed to the vibrating upper plate 504 and the other end fixed to the vibrating piston 505; an ultrasonic oscillator 507 is fixed below the vibrating upper plate 504 and located between the lower part of the vibrating upper plate 504 and the upper part of the vibrating cylinder 502; a vibrating spring 508 has one end fixed inside the vibrating cylinder 502 and the other end fixed to the vibrating piston 505; and a hot air cylinder 509 is fixed... The following components are fixed at the top of the vibrating cylinder 502: a hot air pipe 5010, one end of which is slidably disposed inside the hot air cylinder 509; a hot air spring 5011, one end of which is fixed inside the hot air cylinder 509 and the other end of which is fixed to the hot air pipe 5010; a hot air channel 5012, which is opened on the vibrating cylinder 502; a hot air inlet pipe 5013, which is fixed above the vibrating cylinder 502; a flexible air pipe 5014, which is fixed to the hot air inlet pipe 5013; a hot air outlet pipe 5015, one end of which is fixed below the vibrating cylinder 502 and the other end of which is fixed below the vibrating tray 4; a jet nozzle 5016, which is opened at the bottom of the vibrating tray 4 and is connected to the hot air outlet pipe 5015; a sealing rubber ring 5017 is fixed below the hot air pipe 5010; and an intercepting mesh plate 5018 is fixed to the jet nozzle 5016.

[0041] A pad 101 is provided at the bottom of the drying cabinet 1. A double cabinet door 102 is provided at the front of the drying cabinet 1. A locking plate 103 is provided at the double cabinet door 102. A locking groove plate 104 is fixed to the double cabinet door 102.

[0042] Specifically, the double cabinet door 102 is used to open the drying cabinet 1. The locking plate 103 is rotated and engaged in the locking groove plate 104, so that the double cabinet door 102 can be in a closed and sealed state.

[0043] In a preferred embodiment of the present invention, the support member 3 includes: a support plate 301, fixed inside the drying cabinet 1; a telescopic cylinder 302, fixed on the support plate 301; a telescopic core rod 303, slidably inserted into the telescopic cylinder 302 from below; a support plate 304, fixed above the telescopic core rod 303; and a support spring 305, one end fixed on the support plate 301 and the other end fixed below the support plate 304. The support member 3 also includes: a pressure sensor 306, fixed above the support plate 304; and a support pad 307, fixed below the pressure sensor 306 and above the bottom of the vibrating tray 4.

[0044] Specifically, the telescopic cylinder 302, the telescopic core rod 303, and the support spring 305 are used to provide elastic support, facilitating the up-and-down vibration of the vibrating tray 4; the pressure sensor 306 is used to detect the weight of the raw materials in the vibrating tray 4.

[0045] In a preferred embodiment of the present invention, the heat circulation component 6 includes: a hot air box 601, fixed inside the functional box 2; an electric heating element 602, fixed inside the hot air box 601; an air filter plate 603, fixed on the functional box 2 and connected to the hot air box 601; a temperature sensor 604, fixed at the air outlet end of the hot air box 601; a turbine fan 605, fixed inside the functional box 2; a hot air inlet pipe 606, one end fixed to the air outlet end of the hot air box 601, and the other end fixed to the turbine fan 605; a hot air delivery pipe 607, fixed at the top to the turbine fan 605 and extending to the drying cabinet 1 at the bottom; a hot air branch pipe 608, one end fixed to both sides of the hot air delivery pipe 607, and the other end fixed to the flexible air pipe 5014; a flow control valve 609, fixed to the hot air branch pipe 608; and a temperature controller 6010, fixed inside the functional box 2.

[0046] The heat circulation component 6 also includes: a dehumidification box 6011, fixed inside the functional box 2; an air suction pipe 6012, one end of which is fixed to the dehumidification box 6011 and the other end extends to the drying cabinet 1; an exhaust fan 6013, fixed inside the functional box 2, with its working end fixed to the air suction pipe 6012; an air suction hole 6014, located at the inner top of the drying cabinet 1 and connected to the air suction pipe 6012; and a circulating air pipe 6015, one end of which is fixed to the dehumidification box 6011 and the other end of which is fixed to the hot air box 601.

[0047] Specifically, the thermostat 6010 is used to control the temperature of the heating element 602; a molecular sieve or silica gel dryer can be installed in the dehumidification box 6011 to remove moisture from the hot air flow and return the hot air flow to the hot air box 601, saving energy consumption.

[0048] This invention is used to dry the raw materials of cling film. During storage and transportation, the raw materials of cling film will absorb moisture from the air due to the humidity of the environment, forming surface adsorbed water or free water between particles. If this moisture is not removed, it will vaporize due to high temperature in the subsequent melt extrusion process, thus forming bubbles or pinholes, resulting in problems such as holes and uneven thickness in the cling film.

[0049] When in use, the raw materials can be evenly distributed in the vibrating tray 4, or the raw materials can be spread flat in the small grid frame, and then the grid frame containing the raw materials can be placed in the vibrating tray 4. With the help of the grid frame, it is convenient to remove the material after drying. The grid frame can be fixedly connected to the vibrating tray 4 by clamps or snap-fit. The vibrating trays 4 are arranged in two rows in the drying cabinet 1, and their number can be increased or decreased according to the needs when producing the drying equipment.

[0050] The support plate 301, telescopic cylinder 302, telescopic core rod 303, support plate 304, support spring 305, pressure sensor 306, and support pad 307 together constitute the support structure, which supports the vibrating tray 4. The telescopic cylinder 302, telescopic core rod 303, and support spring 305 provide elastic support. The pressure sensor 306 is used to detect the initial weight of the vibrating tray 4, as well as the total weight of the grid frame and the raw materials, so as to match the appropriate power of the ultrasonic oscillator 507.

[0051] The electric heating element 602 inside the hot air box 601 is activated, generating heat. Simultaneously, the turbine fan 605 is activated, drawing air from the hot air box 601 through the hot air inlet pipe 606. The temperature sensor 604 detects the temperature at the outlet of the hot air box 601, which draws in outside air through the air filter plate 603. The heated airflow enters the hot air delivery pipe 607, which delivers the hot airflow to the hot air branch pipes 608. Each hot air branch pipe 608 is equipped with a flow control valve 609, which controls a corresponding vibrating tray 4. When the flow control valve 609 is open, the hot air branch pipe 608 is connected to the flexible air pipe 5014. The flow control valve 609 controls the flow rate of the hot airflow within the hot air branch pipe 608.

[0052] The hot air flow in the flexible air tube 5014 enters the hot air inlet pipe 5013, then flows through the hot air channel 5012 into the vibrating cylinder 502, and then flows out of the vibrating cylinder 502 from the hot air outlet pipe 5015; the hot air flow enters the jet hole 5016 through the hot air outlet pipe 5015, and finally is ejected from the jet hole 5016, contacting the raw material and drying it.

[0053] When the ultrasonic oscillator 507 is activated, it generates up-and-down vibrations, which in turn drive the vibrating tray 4 to vibrate up and down synchronously.

[0054] When the ultrasonic oscillator 507 vibrates upward, it drives the upper vibrating plate 504 and the vibrating tray 4 to move upward. The upper vibrating plate 504 drives the guide column 506 to slide upward inside the vibrating cylinder 502, and the guide column 506 in turn drives the vibrating piston 505 to move upward. When the vibrating piston 505 moves upward, it blocks the sealing rubber ring 5017 of the hot gas pipe 5010, so that the hot gas flow in the hot gas channel 5012 is blocked by the vibrating piston 505 and cannot flow to the hot gas outlet pipe 5015. The jet nozzle 5016 no longer ejects hot air, and the raw material in the vibrating tray 4 is then vibrated upwards. As the vibrating piston 505 moves upwards, the hot air pipe 5010 retracts into the hot air cylinder 509. At the same time, the hot air pipe 5010 compresses the hot air spring 5011. This design ensures that the vibrating piston 505 remains effectively sealed with the sealing rubber ring 5017 of the hot air pipe 5010 during its ascent, thus preventing the hot air from flowing to the hot air outlet pipe 5015.

[0055] When the ultrasonic oscillator 507 vibrates downwards, it drives the upper vibrating plate 504 and the vibrating tray 4 to move downwards. When the material reaches its highest point, there is a slight dwell time. During this dwell time, the vibrating piston 505 begins to move downwards with the help of the vibrating spring 508. Simultaneously, the hot air pipe 5010 extends downwards from the hot air cylinder 509 under the action of the hot air spring 5011. After the hot air pipe 5010 is fully extended from the hot air cylinder 509, the vibrating piston 505 continues to move downwards. At this point, the vibrating piston 505 no longer blocks the sealing rubber ring 5017 opening of the hot air pipe 5010, and the hot air flows from the hot air channel 5012... The gas flows out of cylinder 509 and hot air pipe 5010, enters hot air outlet pipe 5015, and is then ejected through jet hole 5016. At this time, the raw material is still in the air and there is a certain gap between it and the inner bottom of the vibrating tray 4, which is just right for drying when the raw material is in the air. When the vibrating piston 505 moves down to the lowest position, the ultrasonic oscillator 507 vibrates upward again, and the vibrating piston 505 moves upward accordingly, sealing the opening of the sealing rubber ring 5017 of the hot air pipe 5010 again. At this time, the raw material returns to the vibrating tray 4, and the hot air flow no longer ejects from the jet hole 5016. The ultrasonic oscillator 507 vibrates up and down in this way, working in a cycle.

[0056] During the drying process by the hot airflow, the raw material is always detached from the vibrating tray 4. The hot airflow can completely carry the moisture emitted by the raw material upwards, preventing the moisture emitted by the raw material from accumulating in the vibrating tray 4, thereby keeping the inside of the vibrating tray 4 dry and also effectively dissipating heat. Due to the up-and-down vibration of the ultrasonic oscillator 507, the raw material will continuously change the surface facing the hot airflow, achieving efficient drying.

[0057] After the exhaust fan 6013 is started, the exhaust fan 6013 draws out the hot air from inside the drying cabinet 1 through the suction pipe 6012 and the suction hole 6014; the hot air enters the dehumidification box 6011 through the suction pipe 6012, and after the moisture carried in the dehumidification box 6011 is removed, it enters the hot air box 601 through the circulating air pipe 6015, thereby saving energy consumption.

[0058] like Figure 11 As shown, an embodiment of the present invention provides a raw material drying device for processing cling film. The control module monitors the vibration signal of the ultrasonic oscillator 507 in real time through a vibration phase detection algorithm, extracts key phase points within the vibration cycle, and simultaneously collects the real-time position data of the vibrating piston 505 through a displacement sensor integrated in the guide column 506. A "vibration phase - piston position" spectrum correlation model is constructed through Fourier transform. When the ultrasonic oscillator 507 is detected to enter the rising vibration stage, the control module triggers the pneumatic control unit to close the hot air channel 5012, and the hot air flow is blocked by the sealing rubber ring 5017 between the vibrating piston 505 and the end face of the hot air pipe 5010. When the ultrasonic oscillator 507 is detected to enter the falling vibration stage, the vibrating piston 505 descends to the bottom and simultaneously triggers the opening of the hot air channel 5012, so that the hot air flow is ejected through the hot air outlet pipe 5015 and the jet hole 5016, ensuring that the hot air flow injection and the raw material throwing trajectory are phase synchronized.

[0059] The control module processes the initial weight data of the raw materials collected by the pressure sensor 306 based on a fuzzy adaptive PID control algorithm. By establishing a fuzzy rule base, it achieves dynamic matching between ultrasonic power and hot air flow: when the raw material weight is in the low range, the ultrasonic oscillator 507 is controlled to operate at 40% of its rated power, matching the hot air flow with the flow control valve 609 at 30% opening; when the raw material weight is in the middle range, the power of the ultrasonic oscillator 507 is automatically adjusted to 60% to 75% of its rated power, and the hot air temperature is simultaneously increased to 75℃; when the raw material weight is in the high range, the ultrasonic oscillator 507 is controlled to operate at 90% of its rated power, and the flow control valve 609 of the hot air branch pipe 608 is opened and adjusted to 85% opening. By increasing the vibration frequency, the dispersion of the raw materials is improved, and the heat and mass exchange efficiency is enhanced.

[0060] The control module uses a Kalman filter algorithm to denoise the real-time weight data collected by the pressure sensor 306, and combines it with the hot air temperature data from the temperature sensor 604 to construct a state-space model of the drying process: when the weight decay rate drops to 0.3% / min, it is determined that the raw material is close to the drying endpoint, and the PID parameter self-tuning program is automatically started to gradually reduce the power of the ultrasonic oscillator 507 to 30% of the rated power and lower the hot air temperature to 55℃; when the weight decay rate changes by less than 0.05% for 5 consecutive sampling cycles, it is determined that the drying is complete, the ultrasonic oscillator 507 is stopped, the flow control valve 609 is closed, and the exhaust fan 6013 is started to run for 12 seconds to remove residual moisture; if the hot air temperature deviation is detected to exceed ±3℃ or the vibration frequency deviation of the ultrasonic oscillator 507 exceeds 8%, the fuzzy neural network fault diagnosis system is immediately triggered to identify the fault type through feature parameter comparison and execute the corresponding safety protection strategy, while storing the fault code in the EEPROM.

[0061] Example 1:

[0062] This embodiment provides a basic device for drying raw materials for cling film processing. Its core is to achieve efficient drying of raw materials through the mechanical coordination of vibration and hot air. The device consists of a drying cabinet 1 and a functional box 2 forming the main frame. The drying cabinet 1 is supported by a support 3 to support a vibrating tray 4. A drying component 5 is connected below the tray. A heat circulation component 6 is fixed on the functional box 2, forming a complete structural chain of "support-vibration-heating".

[0063] The support component 3 adopts an elastic support design. The telescopic cylinder 302, telescopic core rod 303, and support spring 305 cooperate to provide stable support for the vibrating tray 4. It can flexibly extend and retract with vibration, avoiding rigid connection that hinders vibration. The pressure sensor 306 is installed between the support plate 304 and the vibrating tray 4, which can detect the weight of the raw material in real time and provide basic data for subsequent drying parameter adjustment. The core of the drying component 5 is the ultrasonic oscillator 507. The up and down vibration generated by the ultrasonic oscillator 507 is transmitted to the vibrating tray 4 through the vibrating upper plate 504 and guide column 506, so that the raw material is synchronously thrown with the tray. At the same time, the vibrating piston 505 slides in the vibrating cylinder 502 with vibration. By contacting and separating with the sealing rubber ring 5017 below the hot air pipe 5010, it precisely controls the opening and closing of the hot air channel 5012. When the raw material rises, it blocks the hot air to avoid vibration. When the tray 4 comes into contact with the raw material, moisture is removed, resulting in moisture adhering to the inside of the vibrating tray 4. When the raw material descends and remains suspended in the air, the channel is opened, and hot air is ejected from the jet hole 5016 through the hot air outlet pipe 5015, directly acting on the suspended raw material. At this time, the raw material is dispersed due to vibration, the heating area is significantly increased, and the moisture evaporation efficiency is greatly improved. The heat circulation component 6 heats the air through the electric heating tube 602 in the hot air box 601, and delivers it to each vibrating tray 4 through the turbine fan 605. The flow control valve 609 can individually adjust the intensity of the hot air flow for each vibrating tray 4. At the same time, the humid hot air is dried by the dehumidification box 6011 and then flows back to the hot air box 601, realizing heat recycling and reducing energy consumption. The double cabinet doors 102 of the drying cabinet 1 are sealed by the locking plate 103 and the locking groove plate 104 to prevent heat loss and further ensure the stability of the drying environment.

[0064] This embodiment is applicable to scenarios with basic requirements for drying efficiency. Through the collaborative design of the mechanical structure, it solves the problems of uneven heating and low heat utilization caused by raw material accumulation in traditional drying. It can effectively remove moisture from the surface of the cling film raw material and the gaps between particles, providing raw materials with the required dryness for the subsequent melt extrusion process.

[0065] Example 2:

[0066] This embodiment adds an intelligent control module to the basic device of embodiment 1. It achieves dynamic adaptation of vibration parameters and hot air parameters through algorithms. The core is a closed-loop control logic of "sensing-analysis-adjustment".

[0067] The control module first captures the vibration signal of the ultrasonic oscillator 507 in real time through a vibration phase detection algorithm, extracting key phase points such as rise and fall within the vibration cycle. The displacement sensor on the guide column 506 synchronously collects the position data of the vibrating piston 505, and establishes a correlation model of "vibration phase - piston position" through Fourier transform to ensure accurate perception of the vibration state. When the ultrasonic oscillator 507 is detected to enter the rising phase, the control module immediately triggers the pneumatic control unit, which closes the hot air channel 5012 through the tight contact between the vibrating piston 505 and the sealing rubber ring 5017. At this time, the raw material rises with the vibrating tray 4, and the hot air injection stops. When entering the falling phase, when the vibrating piston 505 falls to the corresponding position, the control module synchronously opens the hot air channel 5012. The hot air is ejected just when the raw material is suspended in the air, completely synchronized with the raw material throwing trajectory, avoiding efficiency loss caused by "misalignment" between the hot air and the raw material. The hot air effectively removes moisture, keeping the vibrating tray 4 dry.

[0068] For raw materials of different weights, the control module employs a fuzzy adaptive PID control algorithm, establishing adjustment rules based on the initial weight data collected by pressure sensor 306: When the raw material weight is in the low range (e.g., the single drying amount is less than 30% of the total capacity), the ultrasonic oscillator 507 is controlled to operate at 40% of its rated power, while the flow control valve 609 is adjusted to 30% opening to reduce vibration amplitude and hot air flow, preventing a small amount of raw material from splashing due to violent vibration; when the weight is in the middle range (30%–70%), the ultrasonic oscillator is automatically raised... When the ultrasonic power is at 60%–75%, the hot air temperature is adjusted to 75°C via the temperature controller 6010, and the flow control valve 609 is adjusted to an opening of 50%–65%. At this point, the vibration intensity and heat supply are balanced, ensuring that the raw materials are fully dispersed while avoiding overheating. When the weight is in the high range (above 70%), the ultrasonic power is increased to 90% to enhance the vibration dispersion effect, and the flow control valve 609 is opened to 85%. By increasing the hot air flow, heat and mass exchange is enhanced, ensuring that a large amount of raw materials reach the drying standard within the same time.

[0069] This embodiment uses intelligent algorithms to compensate for the lag of manual adjustment, enabling the equipment to automatically adapt to the optimal parameters according to the amount of raw materials. This improves the uniformity of drying while reducing energy consumption. During the drying process, the raw materials are all suspended in the air, and the hot airflow effectively carries away the moisture, keeping the vibrating tray 4 dry.

[0070] Example 3:

[0071] This embodiment, based on the intelligent control of Embodiment 2, further improves the automation and safety of the entire drying process, and achieves closed-loop production through accurate endpoint determination and fault early warning.

[0072] The control module uses a Kalman filter algorithm to process the real-time weight data collected by the pressure sensor 306, filtering out interference factors such as vibration and airflow. It combines the hot air temperature data from the temperature sensor 604 to construct a drying state model and calculate the raw material weight decay rate (moisture evaporation rate) in real time. When the decay rate drops to 0.3% / min, the system determines that the raw material is close to the drying end point. At this time, the PID parameter self-tuning program is automatically started, gradually reducing the power of the ultrasonic oscillator 507 to 30% and lowering the hot air temperature to 55℃ to reduce vibration and heat input and prevent the raw material from becoming brittle and deteriorating due to over-drying. When the change rate of the weight decay rate is less than 0.05% for 5 consecutive sampling cycles (10 seconds per cycle), the drying is determined to be complete. The ultrasonic vibration and hot air supply are immediately stopped, the flow control valve 609 is closed, and the exhaust fan 6013 is started and runs for 12 seconds to exhaust the residual hot and humid air in the drying cabinet 1 through the suction hole 6014, ensuring that the raw material is in a dry state when it is taken out.

[0073] To ensure stable equipment operation, the system incorporates a built-in fault monitoring mechanism: It compares the detected value of temperature sensor 604 with the set value in real time. If the hot air temperature deviation exceeds ±3℃ (e.g., the set temperature is 75℃ but the actual temperature is lower than 72℃ or higher than 78℃), and vibration signal analysis reveals that the frequency deviation of ultrasonic oscillator 507 exceeds 8%, the fuzzy neural network fault diagnosis system is immediately triggered. This system compares the fault with a pre-set feature parameter library, such as a sudden temperature drop corresponding to a heating element fault or frequency fluctuations corresponding to an oscillator malfunction. It quickly identifies the fault type, such as a damaged heating element, airflow blockage, or oscillator aging, and executes corresponding protection strategies. For minor temperature deviations, it automatically adjusts the heating element power; for serious faults, such as frequency abnormalities, it immediately stops the equipment and issues an audible and visual alarm, while storing the fault code in the EEPROM for maintenance personnel to trace the cause.

[0074] This embodiment solves the quality fluctuation problem caused by the traditional drying process of "judging the endpoint based on experience". It reduces human intervention through automated processes and reduces the risk of equipment damage through fault warning. It is suitable for large-scale production lines with high requirements for production stability and safety.

[0075] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A raw material drying device for processing plastic wrap, comprising: The drying cabinet and the functional box disposed in the drying cabinet are characterized in that they further include: Support components are fixed inside the drying cabinet; vibrating trays are fixed above the support components; drying components are fixed above the vibrating trays and below inside the drying cabinet; heat circulation components are fixed on the function box; and a control module is used to control the movement of the drying components to dry the raw materials as they rise. The system comprises: a vibrating support plate fixed to the inner wall of the drying cabinet; a vibrating cylinder fixed to the end of the vibrating support plate away from the drying cabinet; a pad fixed below the vibrating tray; a vibrating upper plate fixed below the pad; a vibrating piston slidably disposed inside the vibrating cylinder; a guide column slidably disposed on the vibrating cylinder, one end fixed to the vibrating upper plate and the other end fixed to the vibrating piston; an ultrasonic oscillator fixed below the vibrating upper plate and located between the lower part of the vibrating upper plate and the upper part of the vibrating cylinder; a vibrating spring fixed at one end inside the vibrating cylinder and the other end fixed to the vibrating piston; a hot air cylinder fixed at the top inside the vibrating cylinder; a hot air pipe slidably disposed at one end inside the hot air cylinder; a hot air spring fixed at one end inside the hot air cylinder and the other end fixed to the hot air pipe; a hot air channel located on the vibrating cylinder; a hot air inlet pipe fixed above the vibrating cylinder; a flexible air tube fixed to the hot air inlet pipe; a hot air outlet pipe fixed at one end below the vibrating cylinder and the other end fixed below the vibrating tray; and an air jet hole located at the bottom inside the vibrating tray and connected to the hot air outlet pipe. The control module monitors the vibration signal of the ultrasonic oscillator in real time using a vibration phase detection algorithm, extracts key phase points within the vibration cycle, and simultaneously collects real-time position data of the vibrating piston using a displacement sensor integrated into the guide column. A "vibration phase - piston position" spectral correlation model is constructed using Fourier transform. When the ultrasonic oscillator is detected to enter the rising vibration stage, the control module triggers the pneumatic control unit to close the hot gas channel, and the hot gas flow is blocked by the sealing rubber ring between the vibrating piston and the end face of the hot gas pipe. When the ultrasonic oscillator is detected to enter the falling vibration stage, the vibrating piston descends to the bottom and simultaneously triggers the opening of the hot gas channel, allowing the hot gas flow to be ejected through the hot gas outlet pipe and jet hole, ensuring that the hot gas flow injection and the raw material throwing trajectory are phase synchronized.

2. The raw material drying device for processing plastic wrap according to claim 1, characterized in that, A sealing rubber ring is fixed below the hot air pipe; an intercepting mesh plate is fixed to the air jet hole.

3. The raw material drying device for processing plastic wrap according to claim 1, characterized in that, The support component includes: The support plate is fixed inside the drying cabinet; the telescopic cylinder is fixed on the support plate; the telescopic core rod is slidably inserted into the telescopic cylinder from below; the support plate is fixed above the telescopic core rod; and the support spring is fixed at one end to the support plate and at the other end below the support plate.

4. The raw material drying device for processing plastic wrap according to claim 1, characterized in that, The support component further includes: The pressure sensor is fixed above the support plate; the support pad is fixed below the pressure sensor and above the bottom of the vibration tray.

5. The raw material drying device for processing plastic wrap according to claim 1, characterized in that, The heat cycle component includes: The hot air box is fixed inside the functional box; the electric heating element is fixed inside the hot air box; the air filter plate is fixed on the functional box and connected to the hot air box; the temperature sensor is fixed at the air outlet of the hot air box; the turbine fan is fixed inside the functional box; one end of the hot air inlet pipe is fixed to the air outlet of the hot air box, and the other end is fixed to the turbine fan; the hot air delivery pipe is fixed to the turbine fan at the top and extends into the drying cabinet at the bottom; the hot air branch pipe is fixed to both sides of the hot air delivery pipe at one end and to the flexible air pipe at the other end; the flow control valve is fixed to the hot air branch pipe; and the temperature controller is fixed inside the functional box.

6. The raw material drying device for processing plastic wrap according to claim 1, characterized in that, The heat cycle component also includes: The dehumidification box is fixed inside the function box; the suction pipe is fixed at one end to the dehumidification box and extends to the drying cabinet at the other end; the exhaust fan is fixed inside the function box and its working end is fixed to the suction pipe; the suction hole is opened at the inner top of the drying cabinet and is connected to the suction pipe; the circulating air duct is fixed at one end to the dehumidification box and at the other end to the hot air box.

7. The raw material drying device for processing plastic wrap according to claim 1, characterized in that, A pad is provided under the drying cabinet, and a double cabinet door is rotatably provided at the front end of the drying cabinet. The double cabinet door is rotatably provided with a locking plate, and the double cabinet door is fixed with a locking groove plate.

8. The raw material drying device for processing plastic wrap according to claim 1, characterized in that, The control module processes the initial weight data of the raw materials collected by the pressure sensor based on a fuzzy adaptive PID control algorithm. It achieves dynamic matching of ultrasonic power and hot air flow rate by establishing a fuzzy rule base: when the raw material weight is in the low range, the ultrasonic oscillator is controlled to operate at 40% of its rated power, matching the hot air flow with the flow control valve at 30% opening; when the raw material weight is in the middle range, the ultrasonic oscillator power is automatically adjusted to 60%–75% of its rated power, simultaneously increasing the hot air temperature to 75°C; when the raw material weight is in the high range, the ultrasonic oscillator is controlled to operate at 90% of its rated power, while simultaneously opening the flow control valve of the hot air branch pipe and adjusting it to 85% opening. By increasing the vibration frequency, the raw material dispersion is improved, enhancing heat and mass transfer efficiency.

9. A raw material drying device for processing plastic wrap according to claim 8, characterized in that, The control module uses a Kalman filter algorithm to denoise the real-time weight data collected by the pressure sensor and combines it with the hot air temperature data from the temperature sensor to construct a state-space model of the drying process: when the weight decay rate drops to 0.3% / min, it is determined that the raw material is close to the drying endpoint, and the PID parameter self-tuning program is automatically started to gradually reduce the power of the ultrasonic oscillator to 30% of the rated power and lower the hot air temperature to 55℃; when the change rate of the weight decay rate is less than 0.05% for 5 consecutive sampling cycles, it is determined that the drying is complete, the ultrasonic oscillator is stopped, the flow control valve is closed, and the exhaust fan is started to run for 12 seconds to remove residual moisture; if the hot air temperature deviation is detected to exceed ±3℃ or the ultrasonic oscillator vibration frequency deviation exceeds 8%, the fuzzy neural network fault diagnosis system is immediately triggered to identify the fault type through feature parameter comparison and execute the corresponding safety protection strategy, while storing the fault code in EEPROM.

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