An electromagnetic induction hot press that allows for rapid heating and cooling

Abstract

This utility model discloses an electromagnetic induction hot press with rapid heating and cooling. The technical solution of this utility model includes a hot press body, which comprises a frame and an upper mold and a lower mold disposed within the frame. The upper mold and the lower mold are respectively connected to a rapid heating module and a rapid cooling module. The rapid heating module includes an electromagnetic heating plate fixedly connected to the upper mold or the lower mold, and an electromagnetic heating coil is disposed within the electromagnetic heating plate. The electromagnetic heating coil is connected to an induction coil junction box. The rapid cooling module includes a cooling plate fixedly connected to the electromagnetic heating plate and a base plate, and a cooling water channel is disposed within the cooling plate. It also includes a high-frequency heater and a chiller connected to the cooling water channel. The high-frequency heater is electrically connected to the induction coil junction box. The solution provided by this utility model has a small footprint, rapid heating, high thermal efficiency, and is energy-saving and environmentally friendly.

Description

Technical Field

[0001] This utility model relates to the field of hot press technology, and in particular to an electromagnetic induction hot press that allows for rapid heating and cooling. Background Technology

[0002] Currently, hot presses or hot bending machines used for molding composite materials, metal materials, and glass generally employ traditional resistance heating rods or heat transfer oil heating methods. These heating methods suffer from problems such as large equipment footprint, low thermal management efficiency, high energy consumption, and pollution of the workshop environment.

[0003] Resistance heating rod method: Although the heating rod has a simple structure, it requires a transition fit with the mounting holes on the mold, resulting in high precision requirements for mold hole machining and extended processing time. In addition, the heating rod is a consumable part, requiring frequent replacement, which increases the number of production downtimes and affects continuous production.

[0004] Heating method for heat transfer oil: The heating and cooling processes of heat transfer oil are relatively slow, resulting in high system thermal inertia. Long-term operation of the oil pipes under high temperature and high pressure conditions poses safety hazards. Furthermore, the oil mist emitted during production pollutes the workshop environment, hinders 5S management, and increases the risk of workers slipping and falling. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the main purpose of this utility model is to provide an electromagnetic induction heating hot press that is small in size, heats up quickly, has high thermal efficiency, and is energy-saving and environmentally friendly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electromagnetic induction hot press for rapid heating and rapid cooling, comprising a hot press body, the hot press body including a frame and an upper mold and a lower mold disposed in the frame, the upper mold and the lower mold being respectively connected to a rapid heating module and a rapid cooling module, the rapid heating module including an electromagnetic heating plate fixedly connected to the upper mold or the lower mold, an electromagnetic heating coil disposed within the electromagnetic heating plate, the electromagnetic heating coil being connected to an induction coil junction box, the rapid cooling module including a cooling plate fixedly connected to the electromagnetic heating plate and a base plate, the cooling plate being disposed of with a cooling water channel, and further including a high-frequency heater and a chiller connected to the cooling water channel, the high-frequency heater being electrically connected to the induction coil junction box.

[0007] Preferably, the electromagnetic heating coil is arranged in a multi-turn serpentine loop shape within the electromagnetic heating plate.

[0008] Preferably, the frame is equipped with two chillers, and each chiller is connected to a chilled water plate.

[0009] Preferably, induction coil junction boxes connected to the electromagnetic heating coil are respectively provided on both sides of the electromagnetic heating plate.

[0010] This invention has the following advantages over existing technologies: 1. The equipment occupies approximately 0.5*0.5 square meters, which is 2 / 3 smaller than that of general oil temperature controllers and steam / high-temperature water heating equipment. 2. Theoretically, electromagnetic heating can reach about 20 degrees Celsius per second; while oil temperature controllers can only reach about 3 degrees Celsius per second; and steam / high-temperature water heating can theoretically reach 5-10 degrees Celsius per second, thus greatly improving the heating speed. 3. The energy consumption of electromagnetic induction heating is generally 1 / 5 that of steam or oil temperature heating because electromagnetic heating can be intermittently pulsed, while steam / high-pressure water and oil temperature controllers need to operate continuously to maintain the working temperature, making it more energy-efficient. 4. Electromagnetic induction heating and cooling can be switched according to a signal or can be performed simultaneously, while steam / high-pressure water and oil temperature controllers require the medium "steam" or "oil" to be discharged before injecting cold medium "steam" or "oil". 5. Long-term high temperatures in steam / high-temperature water can lead to the formation of calcium and magnesium substances, causing blockages or rust in the pipes, while electromagnetic heating pipes do not have this problem, allowing for long-term continuous production. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an electromagnetic induction hot press for rapid heating and rapid cooling according to the present invention.

[0012] Figure 2 This is a half-section view of the lower mold, electromagnetic heating plate, cooling plate and base plate after assembly;

[0013] Figure 3 This is a cross-sectional view of the lower mold, electromagnetic heating plate, cooling plate, and base plate after assembly.

[0014] Figure 4 This is a perspective view of the lower mold, electromagnetic heating plate, cooling plate, and base plate after assembly.

[0015] In the diagram: 1. Hot press body; 2. Frame; 3. Upper mold; 4. Lower mold; 5. Base plate; 6. Electromagnetic heating plate; 7. Cooling plate; 9. Electromagnetic heating coil; 10. Induction coil junction box; 11. Cooling water circuit; 12. Chiller; 13. High frequency heater; 14. Induction heating circuit; 15. Water circuit. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1As shown, an electromagnetic induction hot press with rapid heating and rapid cooling includes a hot press body 1. The hot press body 1 includes a frame 2 and an upper mold 3 and a lower mold 4 disposed in the frame 2. The upper mold 3 and the lower mold 4 are respectively connected to a rapid heating module and a rapid cooling module. The rapid heating module includes an electromagnetic heating plate 6 fixedly connected to the upper mold 3 or the lower mold 4. An electromagnetic heating coil 9 is disposed in the electromagnetic heating plate 6. The electromagnetic heating coil 9 is connected to an induction coil junction box 10. The rapid cooling module includes a cooling plate 7 fixedly connected to the electromagnetic heating plate 6 and a base plate 5. A cooling water channel 11 is disposed in the cooling plate 7. It also includes a high-frequency heater 13 and a chiller 12 connected to the cooling water channel 11. The high-frequency heater 13 is electrically connected to the induction coil junction box 10.

[0018] Preferably, the electromagnetic heating coil 9 is arranged in a multi-turn serpentine loop shape within the electromagnetic heating plate 6.

[0019] Preferably, the frame 2 is equipped with two chillers 12, and each chiller 12 is connected to a chilled water plate.

[0020] Preferably, induction coil junction boxes 10 connected to electromagnetic heating coils 9 are respectively provided on both sides of the electromagnetic heating plate 6.

[0021] This solution presents a rapid heating and cooling electromagnetic induction hot press. Based on a traditional hot press, it utilizes electromagnetic heating to replace the traditional heating rods or oil heating structure. The hot press employs a traditional frame structure, manufactured using welding. Traditionally, heating rods or oil passages are placed by drilling holes in the base plate 5. In this solution, a cooling plate 7 and an electromagnetic heating plate 6 are placed on the base plate 5, followed by the forming mold. The cooling plate 7 contains a cooling water passage 11, and a chiller 12 provides cooling water to the cooling plate 7 through a water passage 15, effectively dissipating heat. The chiller 12 quickly removes the heat generated during hot pressing from the upper mold 3 or lower mold 4. The electromagnetic heating plate 6 contains an electromagnetic heating coil 9, employing the principle of electromagnetic induction heating. The principle of electromagnetic induction heating is primarily based on Faraday's law of electromagnetic induction, utilizing an alternating magnetic field to generate eddy currents in a conductive material, forming resistance heating, which is then transferred to the mold surface through heat conduction. The induction coil junction box 10 transmits the high-frequency, high-current (up to several thousand to tens of thousands of amperes) from the high-frequency heater 13 to the electromagnetic heating coil 9 via the induction heating circuit 14 from the output copper busbar / cable of the high-frequency power supply. The structure and principle of the induction coil junction box 10 are existing technologies and will not be described in detail here.

[0022] The working process of the hot press is as follows: First, the hot press is powered on, the chiller 12 is powered on and the high-frequency heating machine 13 is powered on and the water is supplied. The cooling plate 7, the electromagnetic heating plate 6, and the induction coil junction box 10 are installed on the upper mold 3 and the lower mold 4. The controller switch is turned on, and the water circuit 15 and the circuit are checked to see if they are normal. The mold is installed on the hot press, and various metal or non-metal composite materials are placed on it. The mold is closed, electromagnetic induction heating is applied, the hot press is pressurized, the electromagnetic heating is stopped, and then rapid cooling is performed. The hot press opens the mold and ejects the product.

[0023] The advantages of this solution are:

[0024] 1. The equipment occupies an area of ​​approximately 0.5*0.5 square meters, which is 2 / 3 smaller than that of ordinary oil temperature controllers and high-temperature steam water equipment.

[0025] 2. Theoretically, electromagnetic heating can reach about 20 degrees Celsius per second; while oil heating can only reach about 3 degrees Celsius per second; and steam heating can theoretically reach 5-10 degrees Celsius per second, so its heating speed is greatly improved.

[0026] 3. The energy consumption of electromagnetic induction heating is generally 1 / 5 of that of steam or oil heating. This is because electromagnetic heating can be intermittent and pulsed, while steam, high-pressure water, and oil heating require continuous operation to maintain the working temperature, making it more energy-efficient.

[0027] 4. Electromagnetic induction heating and cooling can be switched according to a signal or can be heated and cooled simultaneously. However, for steam, high-pressure water, and oil, the medium "steam" or "oil" needs to be discharged before the cold medium "steam" or "oil" is injected.

[0028] 5. High-temperature steam and water form calcium and magnesium substances over long periods of time, which can cause blockages or rust in the pipes. However, electromagnetic heating pipes do not have this problem and can produce continuously for a long time.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An electromagnetic induction hot press for rapid heating and cooling, comprising a hot press body, wherein the hot press body includes a frame and an upper mold and a lower mold disposed in the frame, characterized in that: The upper mold and lower mold are respectively connected to a rapid heating module and a rapid cooling module. The rapid heating module includes an electromagnetic heating plate fixedly connected to the upper mold or the lower mold. An electromagnetic heating coil is provided inside the electromagnetic heating plate. The electromagnetic heating coil is connected to an induction coil junction box. The rapid cooling module includes a cooling plate fixedly connected to the electromagnetic heating plate and the base plate. A cooling water channel is provided inside the cooling plate. It also includes a high-frequency heater and a chiller connected to the cooling water channel. The high-frequency heater is electrically connected to the induction coil junction box.

2. The electromagnetic induction hot press for rapid heating and rapid cooling according to claim 1, characterized in that: The electromagnetic heating coil is arranged in a multi-turn serpentine loop shape inside the electromagnetic heating plate.

3. The electromagnetic induction hot press for rapid heating and rapid cooling according to claim 1, characterized in that: The frame contains two chillers, each connected to a chilled water plate.

4. The electromagnetic induction hot press for rapid heating and rapid cooling according to claim 1, characterized in that: The electromagnetic heating plate has induction coil junction boxes on both sides that are connected to the electromagnetic heating coil.

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