Paper-plastic wet pressing rapid heating device based on electromagnetic induction

Abstract

The utility model belongs to heating device technical field especially based on paper and plastic wet pressure quick heating device of electromagnetic induction, including the support plate of fixed paper and plastic wet pressure upper forming die top, four groups of electromagnetic coils are fixed on the support plate, the top of support plate is equipped with the air supply and exhaust component that is used for four groups of electromagnetic coils heat dissipation, the utility model discloses through the inside of paper and plastic wet pressure upper forming die forming cavity directly built -in electromagnetic coil, when electromagnetic coil heats up can directly heat the upper die, and then can quickly improve the heating efficiency of upper die, through the heat dissipation fan in air supply and exhaust component can produce strong airflow, and strong airflow via the air pipe can accurately cool the wind directly blows to four groups of electromagnetic coils, realizes the directional, initiative forced heat dissipation to heat source, and starts drive mechanism can synchronous drive four U type plug pole to separate filter screen, and then realizes the instantaneous release to all filter screen restriction.

Description

Technical Field

[0001] This utility model relates to the field of heating device technology, specifically to a rapid heating device for paper-plastic wet pressing based on electromagnetic induction. Background Technology

[0002] Paper-plastic wet pressing is a key process in the production of molded pulp products such as environmentally friendly packaging and tableware. Its core is to dehydrate and shape the wet pulp blank through heating and pressure. Traditional heating methods mainly rely on embedding heat-conducting oil pipes or electric heating tubes inside the mold to heat the mold through heat conduction. However, this traditional method has inherent defects: it often takes a long time to rise from room temperature to the working temperature, which seriously restricts the production cycle; heat energy must be transferred from the inside to the mold surface, resulting in large energy loss and low efficiency; and the heating tubes are prone to damage and oil leakage, resulting in high maintenance costs. Therefore, we propose a rapid heating device for paper-plastic wet pressing based on electromagnetic induction to solve the above problems. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a rapid heating device for paper-plastic wet pressing based on electromagnetic induction, which solves the problems mentioned in the background section.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] The paper-plastic wet pressing rapid heating device based on electromagnetic induction includes a support plate fixed on the top of the forming mold of paper-plastic wet pressing, four sets of electromagnetic coils are fixed on the support plate, and a ventilation assembly for heat dissipation of the four sets of electromagnetic coils is installed on the top of the support plate.

[0008] The ventilation assembly includes a U-shaped plate fixed to the top of a support plate. Two air inlets are fixed to the top of the U-shaped plate, and a cooling fan is fixed inside each air inlet. Two air ducts are fixed to the outer walls of each air inlet, and the other ends of each air duct pass through the support plate and extend into the interior of the paper-plastic wet pressing mold. A blower hood is fixed to one end of each air duct. Exhaust ducts connected to the top of the support plate are provided on both sides of the U-shaped plate. Filters are installed at the top of the two air inlets and the two exhaust ducts. U-shaped rods for limiting the position of the filters are slidable on the two air inlets and the two exhaust ducts. The U-shaped rods are respectively inserted into the corresponding filters. A drive mechanism for driving the four sets of U-shaped rods to move synchronously in opposite directions is installed on the U-shaped plate.

[0009] Furthermore, the driving mechanism includes a cylinder fixed to the top of the U-shaped plate, a circular plate fixed to the top end of the cylinder, and four connecting rods rotatably connected to the bottom of the circular plate via pins. The other ends of the connecting rods are rotatably connected to corresponding U-shaped inserts via pins.

[0010] Furthermore, two telescopic sleeves are fixed to the top of the U-shaped plate, and the top ends of the telescopic sleeves are fixedly connected to the bottom of the circular plate.

[0011] Furthermore, sealing rings are fixed inside the two air inlets and the two air outlets, and the tops of the sealing rings are tightly fitted to the bottoms of the corresponding filter screens.

[0012] Furthermore, aluminum heat sinks are fixed on each of the four sets of electromagnetic coils, and the number of aluminum heat sinks fixed on the same electromagnetic coil is six sets.

[0013] Furthermore, the cooling fan installed inside the air inlet duct is a high static pressure axial flow fan, and there are two sets of cooling fans installed inside the same air inlet duct.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a rapid heating device for paper-plastic wet pressing based on electromagnetic induction, which has the following beneficial effects:

[0016] This invention integrates electromagnetic coils directly into the forming cavity of a paper-plastic wet-press molding die. When the electromagnetic coils heat up, they directly heat the die, thus rapidly improving heating efficiency. A powerful airflow is generated by a cooling fan in the air supply and exhaust assembly. This powerful airflow, via the air duct, precisely blows cooling air directly onto the four sets of electromagnetic coils, achieving directional and active forced cooling of the heat source. Furthermore, activating the drive mechanism simultaneously drives the four U-shaped rods to detach from the filters, instantly releasing all filter restrictions. This makes subsequent cleaning or filter replacement faster and reduces equipment downtime for maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the support plate structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the blower cover structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the electromagnetic coil structure of this utility model;

[0021] Figure 5 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 6 This is a schematic diagram of the filter structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the U-shaped insert structure of this utility model.

[0024] In the diagram: 1. Support plate; 2. Electromagnetic coil; 3. Air supply and exhaust assembly; 31. U-shaped plate; 32. Air inlet duct; 33. Cooling fan; 34. Air supply pipe; 35. Air exhaust duct; 36. Filter screen; 37. U-shaped insert; 38. Drive mechanism; 381. Cylinder; 382. Circular plate; 383. Connecting rod; 384. Telescopic sleeve; 39. Sealing ring; 310. Air blower hood; 4. Aluminum heat dissipation fins. Detailed Implementation

[0025] 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.

[0026] Example

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, an embodiment of the present invention proposes a paper-plastic wet pressing rapid heating device based on electromagnetic induction, including a support plate 1 fixed on the top of the forming mold on the paper-plastic wet pressing, four sets of electromagnetic coils 2 fixed on the support plate 1, and a ventilation assembly 3 for dissipating heat from the four sets of electromagnetic coils 2 installed on the top of the support plate 1.

[0028] The ventilation assembly 3 includes a U-shaped plate 31 fixed to the top of the support plate 1. Two air inlets 32 are fixed to the top of the U-shaped plate 31, and a cooling fan 33 is fixed inside each air inlet 32. Two air ducts 34 are fixedly connected to the outer walls of each air inlet 32. The other ends of each air duct 34 penetrate the support plate 1 and extend into the interior of the paper-plastic wet pressing mold. A blower hood 310 is fixedly connected to one end of each air duct 34. Exhaust ducts 35 connected to the top of the support plate 1 are provided on both sides of the U-shaped plate 31. A filter screen 36 is installed at the top of each of the two air inlets 32 and the two exhaust ducts 35. The interiors of each of the two air inlets 32 and the two exhaust ducts 35 are fixedly connected to the top of the support plate 1. A sealing ring 39 is provided, and the top of the sealing ring 39 is tightly fitted to the bottom of the corresponding filter screen 36. The sealing ring 39 can enhance the tightness between the filter screen 36 and the air inlet duct 32 and the air outlet duct 35, and prevent external dust from entering the cavity formed by the support plate 1 and the paper-plastic wet pressing mold through the gaps, thus avoiding affecting the use of the electromagnetic coil 2. U-shaped insert rods 37 for limiting the filter screen 36 are slidable on the two air inlet ducts 32 and the two air outlet ducts 35. The U-shaped insert rods 37 are respectively inserted into the corresponding filter screen 36. A drive mechanism 38 for driving the four sets of U-shaped insert rods 37 to move synchronously in opposite directions is installed on the U-shaped plate 31.

[0029] The working principle and usage process of this utility model are as follows: When it is necessary to heat the paper-plastic wet pressing mold, the four sets of electromagnetic coils 2 are energized to generate an alternating magnetic field. At this time, the paper-plastic wet pressing mold can be heated quickly by using the principle of electromagnetic induction, thereby realizing the rapid wet pressing process of paper-plastic materials.

[0030] During the heating process, the electromagnetic coil 2 will generate heat due to electromagnetic induction. In order to avoid the temperature from being too high and affecting the performance of the equipment, the cooling fan 33 inside the two air inlet ducts 32 will start. When the cooling fan 33 starts, it can draw outside air into the air inlet duct 32. Then, the drawn air can be transported to the inside of the paper-plastic wet pressing mold through the air supply pipe 34 connected to the outer wall of the air inlet duct 32. Finally, the air is evenly blown to the electromagnetic coil 2 and the inside of the mold through the blower hood 310 at the end of the air supply pipe 34. The air used by the blower will be discharged through the two exhaust ducts 35, thereby removing the heat.

[0031] When it is necessary to clean or replace the filters 36 on the two air inlets 32 and the two exhaust ducts 35, the drive mechanism 38 can be activated to drive the four sets of U-shaped rods 37 to move synchronously in the opposite direction. After the U-shaped rods 37 move, they will disengage from the filters 36. At this time, after the limit on the filters 36 is released, the filters 36 can be removed. During installation, the drive mechanism 38 can be reversed to allow the U-shaped rods 37 to be reinserted into the filters 36, thus fixing the filters 36.

[0032] like Figure 2As shown, in some embodiments, the drive mechanism 38 includes a cylinder 381 fixed to the top of the U-shaped plate 31. A circular plate 382 is fixed to the top end of the cylinder 381. Two telescopic sleeves 384 are fixed to the top of the U-shaped plate 31. The top ends of the telescopic sleeves 384 are fixedly connected to the bottom of the circular plate 382, ​​which can provide auxiliary support and guidance for the circular plate 382, ​​thereby making it more stable during up-and-down movement. Four connecting rods 383 are rotatably connected to the bottom of the circular plate 382 through pins. The other ends of the connecting rods 383 are rotatably connected to the corresponding U-shaped insert rods 37 through pins, so that... When in use, the cylinder 381 extends, causing the circular plate 382 to move upward. As the circular plate 382 moves upward, it can simultaneously drive the four U-shaped rods 37 to retract and move towards the center position with the cooperation of the four connecting rods 383. At this time, the U-shaped rods 37 can be separated from the filter screen 36. When fixed, the cylinder 381 retracts, causing the circular plate 382 to move downward. As the circular plate 382 moves downward, it can simultaneously drive the four U-shaped rods 37 to expand and move outward in a synchronous manner with the cooperation of the four connecting rods 383. At this time, the U-shaped rods 37 can be inserted and fixed to the filter screen 36.

[0033] like Figure 4 As shown, in some embodiments, aluminum heat sink fins 4 are fixed on all four sets of electromagnetic coils 2, and the number of aluminum heat sink fins 4 fixed on the same electromagnetic coil 2 is six sets. When the electromagnetic coil 2 is energized and heated, it generates heat itself. The aluminum heat sink fins 4 are fixed on the surface of the electromagnetic coil 2, which can quickly conduct the concentrated heat of the coil to the fins. Each set of coils is equipped with six sets of fins, which greatly increases the contact area between the coil and the air, making it easier for heat to dissipate into the surrounding environment. In addition, the thermal conductivity of aluminum is much higher than that of the copper core insulation material commonly used in coils, which can quickly receive the heat generated by the coil and transfer it outward. At the same time, aluminum is lightweight and easy to process, which will not increase the overall weight of the coil, and the regular fin structure can allow airflow to carry away heat more smoothly.

[0034] like Figure 3As shown, in some embodiments, the cooling fans 33 installed inside the air inlet duct 32 are high static pressure axial flow fans, and there are two sets of cooling fans 33 installed inside the same air inlet duct 32. Compared with ordinary axial flow fans, high static pressure axial flow fans can generate higher static pressure, which can effectively overcome the friction resistance along the air supply pipe 34 and the local resistance inside the mold, ensuring that cold air can be smoothly and sufficiently delivered to the heat dissipation area, thus guaranteeing the heat dissipation effect. The installation of two sets of cooling fans 33 in the same air inlet duct 32 can increase the air intake volume, allowing more cold air to enter the system. At the same time, the operation of the two sets of cooling fans 33 can accelerate the air flow speed, thereby allowing external air to reach the surface of the electromagnetic coil 2 more quickly and rapidly remove the heat generated during the heating process. The arrangement of two sets of cooling fans 33 in the same air inlet duct 32 can form redundancy. If one set of cooling fans 33 fails, the other set of cooling fans 33 can still maintain the basic air supply capacity, avoiding the paralysis of the heat dissipation system due to the failure of a single fan, and ensuring the continuity of paper-plastic wet pressing processing.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rapid heating device for paper-plastic wet pressing based on electromagnetic induction, comprising a support plate (1) fixed to the top of the forming mold in paper-plastic wet pressing, characterized in that: Four sets of electromagnetic coils (2) are fixed on the support plate (1), and a ventilation assembly (3) for dissipating heat from the four sets of electromagnetic coils (2) is installed on the top of the support plate (1). The ventilation assembly (3) includes a U-shaped plate (31) fixed to the top of the support plate (1). Two air inlets (32) are fixed to the top of the U-shaped plate (31). A cooling fan (33) is fixed inside each air inlet (32). Two air ducts (34) are fixed to the outer wall of each air inlet (32). The other end of each air duct (34) passes through the support plate (1) and extends into the interior of the paper-plastic wet pressing mold. One end of each air duct (34) is fixed to a blower hood (310). The U-shaped plate (31) Both sides of the 31) are provided with exhaust ducts (35) connected to the top of the support plate (1). The top of the two air inlets (32) and the two exhaust ducts (35) are respectively limited and installed with filters (36). The two air inlets (32) and the two exhaust ducts (35) are each slidably provided with U-shaped inserts (37) for limiting the filters (36). The U-shaped inserts (37) are respectively inserted into the corresponding filters (36). The U-shaped plate (31) is provided with a drive mechanism (38) for driving the four sets of U-shaped inserts (37) to move synchronously in opposite directions.

2. The rapid heating device for paper-plastic wet pressing based on electromagnetic induction according to claim 1, characterized in that: The drive mechanism (38) includes a cylinder (381) fixed to the top of the U-shaped plate (31). A circular plate (382) is fixed to the top end of the cylinder (381). Four connecting rods (383) are rotatably connected to the bottom of the circular plate (382) by a pin. The other end of the connecting rods (383) is rotatably connected to the corresponding U-shaped insert rod (37) by a pin.

3. The rapid heating device for paper-plastic wet pressing based on electromagnetic induction according to claim 2, characterized in that: Two telescopic sleeves (384) are fixed to the top of the U-shaped plate (31), and the top of each telescopic sleeve (384) is fixedly connected to the bottom of the circular plate (382).

4. The rapid heating device for paper-plastic wet pressing based on electromagnetic induction according to claim 1, characterized in that: The interior of each of the two air inlets (32) and the two air outlets (35) is fixed with a sealing ring (39), the top of which is tightly fitted to the bottom of the corresponding filter screen (36).

5. The paper-plastic wet pressing rapid heating device based on electromagnetic induction according to claim 1, characterized in that: Each of the four sets of electromagnetic coils (2) is fixed with aluminum heat dissipation fins (4), and the number of aluminum heat dissipation fins (4) fixed on the same electromagnetic coil (2) is six.

6. The rapid heating device for paper-plastic wet pressing based on electromagnetic induction according to claim 1, characterized in that: The cooling fan (33) installed inside the air inlet duct (32) is a high static pressure axial flow fan, and there are two sets of cooling fans (33) installed inside the same air inlet duct (32).

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