Vacuum medium-temperature hot-pressing curing oven

Abstract

A vacuum medium-temperature hot-pressing curing oven comprises a tank body and a tank door capable of being opened and closed, a plurality of soaking screens are fixedly arranged on the inner side wall of the tank body in a surrounding mode, a plurality of heat insulation screens are evenly fixedly arranged between the soaking screens and the inner side wall of the tank body, a plurality of heating elements are arranged between the heat insulation screens and the soaking screens, and a high-temperature-resistant draught fan is arranged on the inner side face of the tank door. After the soaking screen is additionally arranged, through secondary radiation of the soaking screen, the radiation temperature is high, the area is large, the uniformity is good, and the temperature rise speed and the temperature uniformity are well balanced; the fan for circulation is arranged at the top of the tank body, gas in the tank body is circulated through the gap between the heat screen and the soaking screen, heating can be conducted under the condition that gas exists, forced circulation of the fan is achieved, the temperature is uniform, temperature rise is rapid, the problem of slow temperature rise can be solved through preheating in advance, and the working efficiency of equipment is improved. According to the utility model, heating can be carried out under vacuum or in the presence of air, so that the adaptability is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum heating furnaces, and particularly to a vacuum warm hot pressing and curing furnace. Background Art

[0002] A vacuum heating furnace is a furnace that uses a vacuum pump to evacuate the gas in the furnace to a vacuum state, and uses heating elements to radiate heat to heat workpieces under vacuum. The working temperature is generally 800°C to 3000°C, and it is commonly used for vacuum heat treatment and part curing and forming under vacuum. In a vacuum state, without the heat transfer effect of air, heat can only be transferred by radiation. Since the radiation efficiency of the heating element is proportional to the fourth power of the temperature, the lower the temperature, the lower the heating efficiency. If the surface temperature of the heating element is high and the required temperature of the workpiece is low, there will be too large a temperature difference between the heated surface and the non-heated surface of the workpiece, resulting in uneven thermal deformation of the workpiece, thus affecting the quality of the workpiece. If the surface temperature of the heating element is low, there will be too long a heating-up time and too low production efficiency. In this way, a conventional vacuum heating furnace cannot work below 500°C, but many workpieces need to be processed within the temperature range of 100°C to 300°C under vacuum, such as curing and impregnation treatment, but the current vacuum heating furnace is difficult to meet the above requirements. Content of the Utility Model

[0003] In order to solve the above problems, the purpose of the utility model is to provide a vacuum warm hot pressing and curing furnace.

[0004] To achieve the above purpose, the technical solution of the utility model is: a vacuum warm hot pressing and curing furnace, including a tank body and an openable tank door. A plurality of heat equalizing screens are fixedly arranged around the inner side wall of the tank body. A plurality of heat insulating screens are fixedly arranged between the heat equalizing screens and the inner side wall of the tank body at equal intervals. A plurality of heating elements are arranged between the heat insulating screens and the heat equalizing screens. A high-temperature resistant blower is arranged on the inner side surface of the tank door.

[0005] Further, the heat equalizing screen is made of an arc-shaped plate-like heat conducting material, and the heat insulating screen is made of an arc-shaped plate-like heat insulating material.

[0006] Further, the motor driving the blower is located outside the tank door, and a high-temperature resistant sealing structure is sleeved on the part where the motor shaft penetrates the tank door.

[0007] Further, a support is arranged outside the tank body. A rotating swing arm is fixedly arranged on the outer side surface of the tank door. The fulcrum part of the rotating swing arm is rotatably connected to the top of the support outside the tank body. One end of the power arm of the rotating swing arm is rotatably connected to an opening cylinder, and the other end of the opening cylinder is rotatably connected to the bottom of the support.

[0008] Further, a plurality of legs support the bottom of the tank body, and a drain port is arranged at the center of the bottom of the tank body. The tank body is provided with a vacuum pumping port.

[0009] Furthermore, the heating element is one of an electric heating tube, an electric heating tape or an electric heating wire.

[0010] Furthermore, the tank body is provided with a temperature sensor.

[0011] With the above settings, after adding the heat equalizing screen to the present utility model, through the secondary radiation of the heat equalizing screen, the radiation temperature is fast, the area is large, and the uniformity is good, which better balances the problems of the heating rate and the temperature uniformity; a fan for circulation is provided at the top of the tank body, and the gap between the heat insulation screen and the heat equalizing screen is utilized to circulate the gas in the tank body, so that heating can be carried out in the presence of gas. The fan forces the circulation, and the temperature rises uniformly and rapidly, which can solve the problem of slow heating by preheating in advance and improve the working efficiency of the equipment.

[0012] In summary, the present utility model can be heated under vacuum or in the presence of air, and has stronger adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the drawings.

[0014] Figure 1 It is a schematic diagram of the internal structure of the front view of the present utility model;

[0015] Figure 2 It is a schematic diagram of the top view structure of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] As Figure 1-2 shown, a vacuum warm pressing and curing furnace includes a tank body 1 and an openable tank door 2. A plurality of heat equalizing screens 3 are fixedly arranged around the inner side wall of the tank body 1. A plurality of heat insulation screens 4 are fixedly arranged between the heat equalizing screens 3 and the inner side wall of the tank body 1 at equal intervals. A plurality of heating elements 5 are arranged between the heat insulation screens 4 and the heat equalizing screens 3. The heating element 5 is one of an electric heating tube, an electric heating tape or an electric heating wire. The tank body 1 is provided with a temperature sensor for conveniently monitoring the internal temperature in real time. A high-temperature resistant fan 6 is arranged on the inner side surface of the tank door 2.

[0017] The heat equalizing screen 3 is made of an arc-shaped plate-like heat-conducting material, such as a metal heat-conducting material. The heat insulation screen 4 is made of an arc-shaped plate-like heat-insulating material, such as a high-temperature resistant heat-insulating asbestos, etc. The motor driving the fan 6 is located outside the tank door 2, and a high-temperature resistant sealing structure is sleeved on the part where the motor shaft penetrates the tank door 2 to ensure the normal operation of the fan 6.

[0018] For the convenience of opening the door, a bracket 7 is provided on the outer side of the tank body 1. A rotating swing arm 8 is fixed on the outer side surface of the tank door 2. The fulcrum part of the rotating swing arm 8 is rotatably connected to the top of the bracket 7 on the outer side of the tank body 1. One end of the power arm of the rotating swing arm 8 is rotatably connected to an opening cylinder 9, and the other end of the opening cylinder 9 is rotatably connected to the bottom of the bracket 7. Multiple legs 10 are supported at the bottom of the tank body 1, and a drain port is provided at the center of the bottom of the tank body 1. The tank body 1 is provided with a vacuum pumping port.

[0019] The usage process of the present utility model is as follows: When the pressure inside the tank is normal pressure or positive pressure, the heating element heats up, the fan starts circulating, and the air circulation is utilized to heat the inside of the tank. After the temperature reaches, vacuum degassing is carried out, and at the same time, the heating element heats under vacuum to ensure a constant temperature. Keep warm for the specified time, then cool down, and take out the workpiece.

[0020] The working principle of the present utility model: During heating, after the heating element heats up, the heat is radiated to the heat equalizing screen, and then radiated to the workpiece through the heat equalizing screen. The heat equalizing screen has a larger heating area than the heating element, which can improve the efficiency and uniformity of radiative heat transfer. By setting the heat equalizing screen, the problem of low heating efficiency in the temperature range of 100°C to 300°C is solved. In the absence of a heat equalizing screen, if the power of the heating element is too high, the surface temperature of the workpiece directly irradiated will rise rapidly, while the temperature in the unirradiated area is low, resulting in a large temperature difference. If the power of the heating element is low, the heating rate will be too slow and the heating efficiency will be low. After the heat equalizing screen is added to the present utility model, through the secondary radiation of the heat equalizing screen, the radiation temperature is fast, the area is large, and the uniformity is good, which better balances the problems of heating rate and temperature uniformity.

[0021] A fan for circulation is provided at the top of the tank body. Utilizing the gap between the heat insulation screen and the heat equalizing screen, the gas inside the tank is circulated, and heating can be carried out in the presence of gas. The fan forces the circulation, and the temperature rises evenly and rapidly. This can solve the problem of slow heating by preheating in advance and improve the working efficiency of the equipment. The present utility model can heat under vacuum or in the presence of air, with stronger adaptability.

[0022] The above is only the schematic specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present utility model shall fall within the scope of protection of the present utility model.

Claims

1. A warm pressing and curing furnace in vacuum, comprising a tank body (1) and an openable and closable tank door (2), characterized in that: A plurality of heat equalizing screens (3) are fixedly arranged around the inner side wall of the tank body (1), and a plurality of heat insulation screens (4) are evenly arranged and fixed between the heat equalizing screen (3) and the inner side wall of the tank body (1). A number of heating elements (5) are arranged between the heat insulation screen (4) and the heat equalizing screen (3), and a high-temperature resistant fan (6) is arranged on the inner side surface of the tank door (2).

2. The vacuum warm pressing and curing furnace according to claim 1, wherein: The heat equalizing screen (3) is made of an arc-shaped plate-like heat-conducting material, and the heat insulation screen (4) is made of an arc-shaped plate-like heat-insulating material.

3. The vacuum warm pressing and curing furnace according to claim 1, wherein: The motor driving the fan (6) is located outside the tank door (2), and a high-temperature resistant sealing structure is sleeved on the part where the motor shaft penetrates through the tank door (2).

4. The vacuum warm pressing and curing furnace according to claim 1, wherein: A bracket (7) is arranged outside the tank body (1), and a rotary swing arm (8) is fixed on the outer side surface of the tank door (2). The fulcrum part of the rotary swing arm (8) is rotatably connected to the top of the bracket (7) outside the tank body (1). One end of the power arm of the rotary swing arm (8) is rotatably connected to an opening cylinder (9), and the other end of the opening cylinder (9) is rotatably connected to the bottom of the bracket (7).

5. A vacuum warm pressing and curing furnace as claimed in claim 1, wherein: A plurality of legs (10) support the bottom of the tank body (1), and an emptying port is arranged at the center of the bottom of the tank body (1). The tank body (1) is provided with a vacuum pumping port.

6. The vacuum warm pressing and curing furnace according to claim 1, wherein: The heating element (5) is one of an electric heating tube, an electric heating tape or an electric heating wire.

7. The vacuum warm pressing and curing furnace according to claim 1, characterized in that: The tank body (1) is provided with a temperature sensor.

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