Plastic dryer

Abstract

The utility model is used for the technical field of plastics processing, disclose a plastic drying machine, including support table board, the upper end fixed mounting of support table board has drying barrel, and the upper end of drying barrel is provided with sealed bung, the upper surface fixed setting of sealed bung has feeding hopper, and the middle section fixed setting of feeding hopper has transparent protective cover, and the upper end fixed setting of feeding hopper has feeding barrel, the lower end of feeding barrel penetrates the inside top surface of feeding hopper. The plastic drying machine, through the fixed heat dissipation box on the support table board, the heat dissipation fan on the upper end of the heat dissipation box can accelerate air flow, cooperate the horn mouth structure of " small on the upper end of cooling cavity big " and the upper end closed design, then pass through the low temperature transmission of guide cooling block to the hollow cooling fin of sticking of cooling cavity, build stable low temperature working environment for the distance measuring sensor of cooling cavity upper end inside, completely solve the defect of traditional ultrasonic wave material level meter " poor temperature resistance, can't work in high temperature closed environment ".

Description

Technical Field

[0001] This utility model relates to the field of plastic processing technology, specifically to a plastic dryer. Background Technology

[0002] In the plastics processing industry, plastic dryers are indispensable equipment. Their performance directly affects the quality of plastic products and production efficiency. There are many problems with existing plastic dryers that need to be solved. In terms of material level detection, most similar products do not have the function of measuring material level. Some equipment equipped with material level detection mostly use mechanical level gauges, which can only detect fixed material levels and have poor flexibility. Although photoelectric level gauges can achieve multi-segment detection, their detection accuracy is limited. Ultrasonic level gauges face problems of insufficient accuracy and poor temperature resistance, and cannot meet the accurate measurement requirements in high-temperature and dry environments. Moreover, these traditional level gauges are either expensive and require the use of high-temperature resistant components, or they are difficult to work stably in high-temperature and closed environments, and cannot achieve real-time accurate measurement of material level height and synchronous monitoring of temperature and humidity inside the tank. In addition, the feeding method of existing dryers is mostly to fill the barrel at once. This method has obvious drawbacks when producing small batches or trial molding and prototyping. When the amount of material used is small, filling the barrel at full capacity not only wastes materials and energy, but also causes the excess plastic to dry excessively, which leads to changes in the physical properties of the plastic and seriously affects the performance and quality of subsequent products, making it unable to meet diverse production needs. Therefore, developing a plastic dryer with high-precision material level detection and energy-saving feeding method has become the key to solving the current pain points of the industry and improving the quality and efficiency of plastic processing. Utility Model Content

[0003] The purpose of this invention is to provide a plastic dryer to solve the problems mentioned in the background art, such as insufficient material level detection accuracy, inability to adapt to high temperature environments and high cost, as well as the problem that the feeding method easily causes material and energy waste and affects the physical properties of plastics in small-batch production.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a plastic dryer, including a support table, a drying barrel fixedly installed on the upper end of the support table, and a sealing barrel cover provided on the upper end of the drying barrel. A feeding hopper is fixedly installed on the upper surface of the sealing barrel cover, and a transparent protective cover is fixedly installed in the middle section of the feeding hopper. A feeding bucket is fixedly installed on the upper end of the feeding hopper, and the lower end of the feeding bucket penetrates the inner top surface of the feeding hopper. An electric flip-top is installed on the end of the feeding bucket located inside the feeding hopper. An air inlet pipe penetrates the outer surface of the drying barrel, and a discharge hopper is provided at the lower end of the drying barrel. A heat dissipation box is fixedly installed on the upper surface of the support table, and a cooling fan is fixedly installed inside the upper end of the heat dissipation box. A cooling cavity is fixedly installed inside the lower end of the heat dissipation box, and a circuit board is fixedly installed on the outer surface of the cooling cavity. A distance measuring sensor is fixedly installed inside the upper end of the cooling cavity. A cooling block is fixedly installed on the upper end face of the cooling cavity, and a heat sink is installed inside the heat sink box.

[0005] Preferably, the lower end of the feeding hopper is designed with a slope, and the lower end of the feeding hopper is completely in contact with the upper surface of one end of the electric flip cover.

[0006] By adopting the above technical solution, the inclined design at the bottom of the feeding hopper fits tightly with the electric flip cover. During feeding, by controlling the opening and closing of the electric flip cover, the plastic raw material can slide smoothly down the inclined surface under the action of gravity, achieving precise quantitative feeding. This avoids the waste of materials and energy caused by traditional one-time full-bucket feeding. It is especially suitable for small-batch production or trial molding and sampling, effectively preventing the plastic from drying out too much and causing changes in physical properties, and ensuring the performance and quality of subsequent products.

[0007] Preferably, the air inlet pipe has an L-shaped design, and one end of the air inlet pipe inside the drying barrel is located inside the lower end of the drying barrel.

[0008] Using the above technical solution, the L-shaped air inlet pipe introduces the hot drying airflow from the bottom of the drying barrel, allowing the hot airflow to diffuse evenly from bottom to top and fully contact the plastic material inside the barrel. Compared with the traditional air inlet pipe design, this solution greatly improves the uniformity of drying, avoids the problem of insufficient or excessive drying in some areas, effectively improves drying efficiency, and reduces overall drying time and energy consumption.

[0009] Preferably, the cooling cavity has a flared design with a smaller top and a larger bottom, and the upper end of the cooling cavity is a closed design.

[0010] By adopting the above technical solution, the flared design of the cooling chamber, which is smaller at the top and larger at the bottom, increases the contact area with air. Combined with the closed design at the top, it not only improves the heat dissipation efficiency, but also effectively blocks the intrusion of high-temperature airflow generated by the drying barrel. This provides a stable low-temperature working environment for the circuit board installed on its outer surface and the distance sensor inside the top, ensuring the stable control of the circuit board over the various components of the dryer. At the same time, it enables the distance sensor to accurately measure the material level height in the high-temperature drying environment and to monitor temperature and humidity simultaneously.

[0011] Preferably, the upper end of the cooling block is in contact with the lower surface of the heat sink, and the heat sink has a hollow design.

[0012] Using the above technical solution, the cooling block transfers the low temperature of the cooling chamber to the hollow heat sink. The hollow heat sink has a larger heat dissipation area, which can quickly dissipate heat into the air. Working together with the cooling fan, it further optimizes the heat dissipation effect, creates a more stable low temperature environment for the circuit board and the ranging sensor, ensures their stable operation for a long time, improves the reliability and service life of the entire plastic dryer, and ensures that the drying process is efficient and accurate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This plastic dryer: 1. By using the heat dissipation box fixed on the support table, the cooling fan at the top of the heat dissipation box can accelerate the airflow. Combined with the "small at the top and large at the bottom" flared structure of the cooling chamber and the closed design at the top, the low temperature of the cooling chamber is transferred to the fitting hollow heat dissipation fins through the cooling block. This creates a stable low temperature working environment for the ranging sensor inside the upper part of the cooling chamber, completely solving the defects of traditional ultrasonic level gauges that are "poor temperature resistance and cannot work in high temperature and closed environment". 2. The distance sensor can accurately measure the material level in the drying drum in real time. Compared with the limitations of mechanical level gauges that can only detect fixed material levels and the problem of insufficient accuracy of photoelectric level gauges, the detection accuracy is significantly improved. It also supports multi-segment and dynamic material level monitoring to meet the material level control needs in different production scenarios. At the same time, it does not require the use of expensive high-temperature resistant special components, which greatly reduces the cost of the detection module.

[0014] 3. The lower end of the feeding hopper adopts a sloping design, which is completely in contact with the upper surface of the electric flip cover. The opening angle and duration of the electric flip cover are controlled by the detection results of the distance sensor. The amount of material fed from the feeding hopper to the feeding hopper can be precisely controlled, avoiding the "full hopper feeding" mode of traditional dryers. In small batch production or trial molding and sampling, there is no need to feed the hopper full. On the one hand, it reduces the drying energy consumption occupied by excess material, and on the other hand, it avoids the "physical property changes" caused by excessive drying of excess plastic over a long period of time. This effectively ensures the performance and quality of subsequent plastic products and adapts to diversified production needs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the cross-sectional view connecting the supporting table, drying barrel, and air inlet pipe of this utility model. Figure 4 This is a three-dimensional structural diagram showing the connection between the sealing bucket lid, the feed hopper, and the heat dissipation box of this utility model. Figure 5This is a three-dimensional structural diagram of the cross-sectional view connecting the heat dissipation box, cooling cavity, and distance sensor of this utility model. Figure 6 This is a three-dimensional structural diagram of the cross-sectional view of the connection between the heat sink box and the heat sink fins of this utility model.

[0016] In the diagram: 1. Supporting table; 2. Drying drum; 3. Sealed drum lid; 4. Feed hopper; 5. Transparent protective cover; 6. Feeding drum; 7. Electric flip-top; 8. Air inlet pipe; 9. Discharge hopper; 10. Heat sink; 11. Cooling fan; 12. Cooling chamber; 13. Circuit board; 14. Distance sensor; 15. Cooling block; 16. Heat sink. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-6 This utility model provides a technical solution: a plastic dryer.

[0019] Example 1: This example discloses: a support table 1, a drying barrel 2 fixedly installed on the upper end of the support table 1, a sealing barrel cover 3 provided on the upper end of the drying barrel 2, a feeding hopper 4 fixedly installed on the upper surface of the sealing barrel cover 3, a transparent protective cover 5 fixedly installed in the middle section of the feeding hopper 4, a feeding barrel 6 fixedly installed on the upper end of the feeding hopper 4, the lower end of the feeding barrel 6 penetrating the inner top surface of the feeding hopper 4, and an electric flip cover 7 installed at the end of the feeding barrel 6 located inside the feeding hopper 4, the outer surface of the drying barrel 2 being penetrated by an air inlet pipe 8, and a discharge hopper 9 provided at the lower end of the drying barrel 2; The lower end of the feeding hopper 6 is designed with a slope, and the lower end of the feeding hopper 6 is completely in contact with the upper surface of one end of the electric flip cover 7. The air intake pipe 8 has an L-shaped design, and one end of the air intake pipe 8 inside the drying barrel 2 is located inside the lower end of the drying barrel 2; During the plastic drying process, the plastic raw material to be dried is sucked into the feeding hopper 6 above the support table 1. Because the lower end of the feeding hopper 6 is designed with a slope and is completely flush with the upper surface of one end of the electric flip-top 7, when feeding into the drying hopper 2 is required, the electric flip-top 7 is opened. Under the action of gravity, the plastic raw material smoothly slides along the slope into the feeding hopper 4, and then enters the drying hopper 2. By controlling the opening and closing time and angle of the electric flip-top 7, precise quantitative feeding can be achieved. The sealing lid 3 seals the upper end of the drying hopper 2, ensuring the airtightness of the drying process. The external hot airflow enters the drying barrel 2 through the L-shaped air inlet pipe 8 and the inlet located inside the lower end of the barrel. The hot airflow diffuses from bottom to top and fully contacts the plastic material in the barrel to dry the material. The dried plastic material is discharged through the discharge hopper 9 at the lower end of the drying barrel 2. The transparent protective cover 5 in the middle of the feed hopper 4 allows the operator to observe the material conveying status in the feed hopper 4 in real time to ensure the smooth feeding process. Excess hot air is discharged through the exhaust pipe set at the lower end of the discharge hopper 9 to ensure the continuous injection of hot air.

[0020] Example 2: This example discloses the following based on Example 1: A heat dissipation box 10 is fixedly installed on the upper surface of the support table 1, and a cooling fan 11 is fixedly installed inside the upper end of the heat dissipation box 10. A cooling cavity 12 is fixedly installed inside the lower end of the heat dissipation box 10, and a circuit board 13 is fixedly installed on the outer surface of the cooling cavity 12. A distance measuring sensor 14 is fixedly installed inside the upper end of the cooling cavity 12. The cooling chamber 12 has a flared design with a smaller top and a larger bottom, and the upper part of the cooling chamber 12 is a closed design; During the operation of the plastic dryer, the high temperature inside the drying drum 2 is transferred to the surrounding environment. The cooling fan 11 on the heat dissipation box 10 starts, accelerating the airflow and carrying away the hot air around the heat dissipation box 10. The cooling chamber 12 has a flared design with a smaller top and a larger bottom and a closed top. On the one hand, it increases the contact area with the air and improves the heat dissipation efficiency. On the other hand, it effectively blocks the intrusion of the high-temperature airflow from the drying drum 2. The circuit board 13 installed on the outer surface of the cooling chamber 12 controls the operation of the electrical components of the entire dryer. With the synergistic effect of the cooling fan 11 and the cooling chamber 12, a low operating temperature is maintained to ensure its stable operation. The distance sensor 14 installed inside the upper part of the cooling chamber 12 can accurately measure the material height inside the drying drum 2 in real time in a stable low-temperature environment. By transmitting signals and receiving reflected signals, the actual height of the material is calculated, providing the operator with accurate material level information so as to replenish materials or adjust the drying process in a timely manner.

[0021] Example 3: This example is based on Example 1 and Example 2: A cooling block 15 is fixedly provided on the upper end face of the cooling cavity 12, and a heat sink 16 is snapped into the inside of the heat sink box 10; The upper end of the heat-conducting block 15 is in contact with the lower surface of the heat sink 16, and the heat sink 16 has a hollow design. The cooling block 15 on the upper surface of the cooling chamber 12 transfers the low temperature of the cooling chamber 12 to the hollow heat sink 16 that is attached to it. The hollow heat sink 16 has a larger heat dissipation area, which can quickly dissipate heat into the air and further reduce the temperature of the cooling chamber 12 and its surrounding environment. The cooling fan 11 runs continuously to accelerate air circulation and works in conjunction with the cooling block 15 and the heat sink 16 to create a more stable low-temperature working environment for the circuit board 13 and the distance sensor 14. Under the low-temperature environment, the circuit board 13 stably controls the feeding of the electric flip cover 7, the operation of the cooling fan 11, and the measurement work of the distance sensor 14, ensuring that the entire plastic dryer operates efficiently and stably. Under the good working environment, the distance sensor 14 accurately measures the material level height in the drying barrel 2, providing comprehensive data support for the drying process and ensuring the quality of plastic drying and production efficiency.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic dryer, comprising a support table (1), wherein a drying drum (2) is fixedly mounted on the upper end of the support table (1), and a sealing lid (3) is provided on the upper end of the drying drum (2), characterized in that: The upper surface of the sealed barrel cover (3) is fixedly provided with a feeding hopper (4), and a transparent protective cover (5) is fixedly provided in the middle section of the feeding hopper (4). A feeding bucket (6) is fixedly provided at the upper end of the feeding hopper (4). The lower end of the feeding bucket (6) penetrates the inner top surface of the feeding hopper (4), and an electric flip cover (7) is installed at one end of the feeding bucket (6) located inside the feeding hopper (4). The outer surface of the drying barrel (2) is penetrated by an air inlet pipe (8), and a discharge hopper (9) is provided at the lower end of the drying barrel (2).

2. The plastic dryer according to claim 1, characterized in that: A heat dissipation box (10) is fixedly installed on the upper surface of the support table (1), and a cooling fan (11) is fixedly installed inside the upper end of the heat dissipation box (10). A cooling cavity (12) is fixedly installed inside the lower end of the heat dissipation box (10), and a circuit board (13) is fixedly installed on the outer surface of the cooling cavity (12). A distance measuring sensor (14) is fixedly installed inside the upper end of the cooling cavity (12).

3. The plastic dryer according to claim 1, characterized in that: The lower end of the feeding hopper (6) is designed with a slope, and the lower end of the feeding hopper (6) is completely in contact with the upper surface of one end of the electric flip cover (7).

4. The plastic dryer according to claim 1, characterized in that: The air inlet pipe (8) is L-shaped, and one end of the air inlet pipe (8) inside the drying barrel (2) is located inside the lower end of the drying barrel (2).

5. The plastic dryer according to claim 2, characterized in that: The cooling cavity (12) is designed with a flared opening that is smaller at the top and larger at the bottom, and the upper end of the cooling cavity (12) is a closed design.

6. The plastic dryer according to claim 2, characterized in that: A cooling block (15) is fixedly installed on the upper end face of the cooling cavity (12), and a heat sink (16) is installed inside the heat sink box (10).

7. The plastic dryer according to claim 6, characterized in that: The upper end of the cooling block (15) is in contact with the lower surface of the heat sink (16), and the heat sink (16) has a hollow design.

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