Carbon fiber material molding autoclave

Abstract

The present invention relates to the field of carbon fiber material molding, and specifically to a carbon fiber material molding autoclave. The carbon fiber material molding autoclave includes a tank body, an oil tank, an oil tank heating mechanism and an air heating mechanism. The tank body is provided with a pressurizing channel for pressurizing the inside thereof, and is provided with an air temperature monitoring device for detecting the air temperature in the tank body; the oil tank is located in the tank body, is filled with oil, and is provided with an oil temperature monitoring device for detecting the oil temperature, the surface of the oil is covered with soft silicone for wrapping a workpiece, and the outer ring of the soft silicone is sealed and connected to the oil tank; the oil tank heating mechanism is installed in the oil tank, and is used to work according to the oil temperature monitored by the oil temperature monitoring device; the air heating mechanism is installed in the tank body, and is used to work according to the air temperature monitored by the air temperature monitoring device. The present invention can keep the temperature constant during the material molding process to improve the quality of the workpiece.

Description

Technical Field

[0001] The invention relates to the field of carbon fiber material molding, and in particular to a carbon fiber material molding autoclave. Background Art

[0002] An autoclave is a special pressure vessel that can withstand and regulate a range of temperature and pressure. The autoclave forming process is to seal the composite blank, honeycomb sandwich structure or adhesive structure on the mold with a vacuum bag, and then place it in the autoclave under vacuum (or non-vacuum) conditions, through heating, pressurization, heat preservation (medium or high temperature), cooling and pressure relief processes to make it into the required shape and quality. The manufactured components can be used in the main and secondary load-bearing structures in the aerospace field. The autoclave forming process is mainly suitable for the forming of most thermosetting composite materials, honeycomb sandwich structures and adhesive structures.

[0003] Traditional autoclave molding generally uses heated air to conduct heat and constant heat. The inventor of this patent found that due to the low heat capacity of air, temperature fluctuations are easily caused during the heating process, resulting in local differences in material molding and affecting the overall strength of the material.

[0004] Therefore, it is urgent to design a carbon fiber material molding autoclave to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a carbon fiber material molding autoclave, which can keep the temperature constant during the material molding process to improve the quality of the workpiece.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a carbon fiber material molding autoclave, comprising:

[0007] The tank body is provided with a pressurizing passage for pressurizing the inside thereof and an air temperature monitoring device for detecting the air temperature inside the tank body;

[0008] An oil tank is located in the tank body, filled with oil and provided with an oil temperature monitoring device for detecting the oil temperature, the surface of the oil is covered with soft silicone for wrapping the workpiece, and the outer ring of the soft silicone is sealed and connected to the oil tank;

[0009] an oil tank heating mechanism, used to operate according to the oil temperature monitored by the oil temperature monitoring device to heat the oil tank;

[0010] The air heating mechanism is used to operate according to the air temperature monitored by the air temperature monitoring device to heat the air in the tank body.

[0011] A specific structure and installation position of an oil tank heating mechanism is further provided. The oil tank heating mechanism comprises a plurality of electromagnetic heating plates. A space is left between the bottom of the oil tank and the bottom of the tank body. The electromagnetic heating plates are tightly attached to the bottom of the oil tank in the space.

[0012] In order to further ensure that the air temperature in the tank is constant, circulation fans are respectively arranged at both ends of the space to blow out the air in the space and make the air in the tank flow.

[0013] In order to better maintain the temperature in the oil tank at the set temperature, the carbon fiber material molding autoclave also includes a heating cover, which is connected to the top of the tank body through a lifting drive mechanism, and the lifting drive mechanism is used to drive the heating cover to rise to a point where it does not interfere with the workpiece entering and exiting the oil tank and to descend to cover the oil tank; wherein,

[0014] A microwave heating device is arranged in the bottom of the heating cover, and a portion of the heating cover avoiding the microwave heating device is filled with a heat insulating material. The microwave heating device is used to work according to the oil temperature monitored by the oil temperature monitoring device.

[0015] Furthermore, the air heating mechanism includes at least one heating plate installed in the tank body.

[0016] In order to further evenly distribute the adhesive material of the workpiece, the carbon fiber material molding autoclave further includes a plurality of ultrasonic vibrators, and the plurality of ultrasonic vibrators are closely attached to the wall of the oil tank.

[0017] In order to further facilitate cooling of the workpiece, the carbon fiber material molding autoclave also includes a cooling channel connected to the oil tank, which is located above the soft silicone and extends to the outside of the tank body.

[0018] Furthermore, the tank body has an openable and closable hatch.

[0019] After adopting the above technical solution, the present invention has the following beneficial effects:

[0020] 1. The oil bath structure used in the autoclave of the present invention can greatly increase the heat capacity in the autoclave, so that the temperature is kept constant. In addition, the temperature is easier to control by using multi-layer temperature control, which is less affected by the outside world, and the temperature of the workpiece is further guaranteed to be constant. In addition, the workpiece is wrapped with soft silicone, so that the workpiece is heated constantly in all directions, and the strength of the workpiece is more uniform. Therefore, the present invention uses the oil bath structure, multi-layer temperature control and soft silicone to work together to keep the workpiece in a constant temperature environment with no local difference, thereby improving the overall strength and uniformity of the workpiece and improving the quality of the workpiece.

[0021] 2. The present invention is provided with a circulation fan to achieve good circulation of air in the tank, better ensure constant temperature of various parts in the tank, heat the oil tank through the heating cover, and isolate the air, so that the multi-layer temperature control effect is better.

[0022] 3. The present invention transmits ultrasonic waves along the oil to the workpiece being processed through the effect of ultrasonic waves, so that the adhesive in the workpiece flows more smoothly and evenly, achieving the purpose of balanced distribution and further improving the quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram showing that the heating cover of the oil tank of the carbon fiber material molding autoclave of the present invention is raised to a high position;

[0024] Figure 2 It is a structural schematic diagram showing that the heating cover of the oil tank of the carbon fiber material molding autoclave of the present invention is lowered to a low position;

[0025] In the figure, 1. tank body; 11. pressurized channel; 12. hatch; 2. air temperature monitoring device; 3. oil tank; 31. soft silicone; 32. cooling channel; 4. oil temperature monitoring device; 5. oil tank heating mechanism; 6. air heating mechanism; 7. circulating fan; 8. heating cover; 81. microwave heating device; 82. thermal insulation material; 9. lifting drive mechanism; 10. ultrasonic vibrator. DETAILED DESCRIPTION

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0027] Embodiment 1

[0028] like Figure 1 and Figure 2 As shown, a carbon fiber material molding autoclave comprises:

[0029] The tank body 1 is provided with a pressurizing channel 11 for pressurizing the inside thereof, and is provided with an air temperature monitoring device 2 for detecting the air temperature in the tank body 1, and the tank body 1 is pressurized through the pressurizing channel 11;

[0030] The oil tank 3 is located in the tank body 1, and is filled with oil. An oil temperature monitoring device 4 for detecting the oil temperature is provided. The surface of the oil is covered with a soft silica gel 31 for wrapping the workpiece. The outer ring of the soft silica gel 31 is sealed and connected to the oil tank 3.

[0031] The oil tank heating mechanism 5 is installed in the oil tank 3 and is used to work according to the oil temperature monitored by the oil temperature monitoring device 4 to heat the oil tank 3;

[0032] The air heating mechanism 6 is installed in the tank body 1 and is used to work according to the air temperature monitored by the air temperature monitoring device 2 to heat the air in the tank body 1 .

[0033] In this embodiment, if Figure 1 and Figure 2 As shown, the oil tank heating mechanism 5 may include, but is not limited to, a plurality of electromagnetic heating plates, and a space is left between the bottom of the oil tank 3 and the bottom of the tank body 1, and the electromagnetic heating plates are close to the bottom of the oil tank 3 in the space. The air heating mechanism 6 may include, but is not limited to, at least one heating plate installed in the tank body 1. The carbon fiber material molding autoclave also includes a cooling channel 32 that is connected to the oil tank 3 and is located above the soft silicone 31 and extends to the outside of the tank body 1, and cold air can be blown into the oil tank 3 through the cooling channel 32. The tank body 1 has a hatch 12 that can be opened and closed. The tank body 1 is also provided with a vacuum channel, through which the vacuum bag of the workpiece jacket is vacuumed.

[0034] In this embodiment, the tank body 1 can withstand a certain pressure and temperature. A supporting foot is arranged under the tank body 1. One end of the tank body 1 is closed, and an openable hatch 21 is arranged at the other end. The hatch 21 is connected to the tank cover. An electronic control system is arranged in the tank cover. The air temperature monitoring device 2, the oil temperature monitoring device 4, the air heating mechanism 6 and the oil tank heating mechanism 5 are respectively connected to the electronic control system. The electronic control system controls the air heating mechanism 6 to work according to the temperature feedback from the air temperature monitoring device 2, and controls the oil tank heating mechanism 5 to work according to the temperature feedback from the oil temperature monitoring device 4, so that the oil temperature and the air temperature reach their respective set temperatures.

[0035] During operation, the workpiece is covered with a vacuum bag and placed on the soft silicone 31 of the oil tank 3. After closing the hatch 12, the heating program and pressure program are set according to the process requirements. The electromagnetic heating plate under the oil tank 3 and the heating plate of the tank body 1 start heating. When the temperature reaches the set temperature and maintains a certain temperature, due to the high heat capacity of the oil, the temperature of the workpiece can be easily controlled. At the same time, the pressure in the tank body 1 is adjusted to keep the pressure required by the process. After the time required for the temperature curing process is stabilized, the workpiece can be taken out after the pressure is released and cooled to complete the workpiece processing process.

[0036] The oil bath structure used in the autoclave of this embodiment can greatly increase the heat capacity in the autoclave, so that the temperature is kept constant. In addition, the temperature is easier to control and less affected by the outside world by using multi-layer temperature control to keep the oil temperature in the oil tank 3 constant and the air temperature in the tank body 1 constant, which further ensures that the temperature of the workpiece is constant. In addition, the workpiece is wrapped with soft silicone 31, so that the workpiece is heated constantly in all directions, and the strength of the workpiece is more uniform. Therefore, in this embodiment, the oil bath structure, multi-layer temperature control and soft silicone 31 work together to keep the workpiece in a constant temperature environment with no local difference, thereby improving the overall strength and uniformity of the workpiece and improving the quality of the workpiece.

[0037] Embodiment 2

[0038] Based on the first embodiment, Figure 1 and Figure 2 As shown, circulation fans 7 are respectively arranged at both ends of the space to blow out the air in the space and make the air in the tank body 1 flow.

[0039] Specifically, the present embodiment is provided with a circulation fan 7 to achieve good circulation of air in the tank body 1 and better ensure constant temperature of various parts in the tank body 1 .

[0040] Embodiment 3

[0041] On the basis of Example 1 or Example 2, Figure 1 and Figure 2 As shown, the carbon fiber material molding autoclave also includes a heating cover 8, which is connected to the top of the tank body 1 through a lifting drive mechanism 9, and the lifting drive mechanism 9 is used to drive the heating cover 8 to rise to a position where it does not interfere with the workpiece entering and exiting the oil tank 3 and to descend to cover the oil tank 3; wherein,

[0042] A microwave heating device 81 is provided at the bottom of the heating cover 8 , and a portion of the heating cover 8 away from the microwave heating device 81 is filled with a heat insulating material 82 . The microwave heating device 81 is used to work according to the oil temperature monitored by the oil temperature monitoring device 4 .

[0043] In this embodiment, the lifting drive mechanism 9 can have various structures, such as a hydraulic cylinder, a traction rope, etc. Figure 1 and Figure 2 The drawing rope is shown. The heat insulating material 82 can be heat insulating cotton.

[0044] Specifically, the heating cover 8 is used to auxiliary heat the oil tank 3 and isolate the air, so that the multi-layer temperature control effect is better.

[0045] Embodiment 4

[0046] On the basis of the first embodiment, the second embodiment or the third embodiment, as Figure 1 and Figure 2 As shown, the carbon fiber material molding autoclave further includes a plurality of ultrasonic vibrators 10, and the plurality of ultrasonic vibrators 10 are closely attached to the wall of the oil tank 3. The plurality of ultrasonic vibrators 10 can be closely attached to the bottom of the oil tank 3 in space and spaced apart from the electromagnetic heating plate.

[0047] Specifically, through the effect of ultrasound, the ultrasound is transmitted along the oil to the workpiece being processed, so that the adhesive in the workpiece flows more smoothly and evenly, achieving the purpose of balanced distribution, thereby further improving the strength and uniformity of the workpiece and further improving the quality of the workpiece.

[0048] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A carbon fiber material molding autoclave, characterized in that: include: The tank body (1) is provided with a pressurizing passage (11) for pressurizing the inside thereof, and is provided with an air temperature monitoring device (2) for detecting the air temperature inside the tank body (1); An oil tank (3) is located in the tank body (1), filled with oil and provided with an oil temperature monitoring device (4) for detecting the oil temperature, the surface of the oil being covered with soft silica gel (31) for wrapping the workpiece, the outer ring of the soft silica gel (31) being sealed and connected to the oil tank (3); An oil tank heating mechanism (5) is used to operate according to the oil temperature monitored by the oil temperature monitoring device (4) to heat the oil tank (3); An air heating mechanism (6) is used to operate according to the air temperature monitored by the air temperature monitoring device (2) to heat the air in the tank body (1); A heating cover (8), the heating cover (8) is connected to the top of the tank body (1) via a lifting drive mechanism (9), the lifting drive mechanism (9) is used to drive the heating cover (8) to rise to a point where it does not interfere with the workpiece entering or exiting the oil tank (3) and to descend to cover the oil tank (3); wherein, A microwave heating device (81) is arranged in the bottom of the heating cover (8), and a portion of the heating cover (8) away from the microwave heating device (81) is filled with a heat insulating material (82), and the microwave heating device (81) is used to operate according to the oil temperature monitored by the oil temperature monitoring device (4); The oil tank heating mechanism (5) comprises a plurality of electromagnetic heating plates, a space is left between the bottom of the oil tank (3) and the bottom of the tank body (1), and the electromagnetic heating plates are closely attached to the bottom of the oil tank (3) in the space; There is a gap between the left and right ends of the oil tank (3) and the upper end of the heating cover (8) and the tank body (1).

2. The carbon fiber material molding autoclave according to claim 1, characterized in that: Circulation fans (7) are respectively arranged at the two ends of the space to blow out the air in the space and make the air in the tank body (1) flow.

3. The carbon fiber material molding autoclave according to claim 1, characterized in that: The air heating mechanism (6) comprises at least one heating plate installed in the tank body (1).

4. The carbon fiber material molding autoclave according to claim 1, characterized in that: It also includes a plurality of ultrasonic vibrators (10), which are closely attached to the groove wall of the oil groove (3).

5. The carbon fiber material molding autoclave according to claim 1, characterized in that: It also includes a cooling channel (32) which is connected to the oil tank (3) and is located above the soft silica gel (31) and extends to the outside of the tank body (1).

6. The carbon fiber material molding autoclave according to claim 1, characterized in that: The tank body (1) has a hatch (12) that can be opened and closed.

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