Polyimide foaming equipment for conformal foaming of pipe fittings in space
By introducing a microwave infrared integrated device, a rotation and oscillation mechanism, and a nitrogen circulation system and precise control into the polyimide foaming equipment, the problem of poor foaming uniformity in space has been solved, achieving efficient and uniform foaming results and adapting to the application needs of different environments.
Patent Information
- Application Number
- CN202520141796.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing polyimide foaming equipment suffers from poor foaming uniformity, low processing efficiency, and poor adaptability during conformal foaming, especially in the weightless environment of space where the distribution of polyester ammonium salt powder is uneven, resulting in poor foaming quality.
By employing a microwave-infrared integrated device combined with a rotation and oscillation mechanism, microwave heating is used in space to ensure uniform distribution of polyester ammonium salt powder in a weightless environment. Combined with a nitrogen circulation system and precise temperature and pressure control, an efficient and uniform foaming process is achieved. Infrared heating is used on the ground to adapt to different environments.
It achieves efficient and uniform conformal foaming in space, ensuring the uniformity and quality of polyimide foam during the foaming process. It is highly adaptable and can be used in different environments, improving foaming efficiency and material performance.
Smart Images
Figure CN223685865U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of foaming, and particularly relates to a polyimide foaming equipment for conformal foaming of a rod in space. BACKGROUND
[0002] In a space environment, the performance of materials and the processing technology are more demanding. Carbon fiber composite materials not only have light weight, but also have excellent corrosion resistance and thermal stability. Using carbon fiber composite material structures to replace metal materials such as aluminum alloys and titanium alloys in the previous truss structures can effectively reduce the structural mass of a spacecraft and increase the effective load. Polyimide foam has excellent properties such as high strength and rigidity, high and low temperature resistance, good heat insulation, solvent resistance, and radiation resistance, and is a key material for improving the rigidity of support structure rods and an important material indispensable in the field of aerospace.
[0003] Polyester ammonium salt precursor powder foamed polyimide can obtain polyimide foam with uniform cells, low density, and high specific surface area, and has excellent performance. Moreover, the polyester ammonium salt precursor powder is chemically stable, easy to store, and easy to carry in space. Compared with foaming on the ground without weightlessness, foaming in space without weightlessness can lead to a more uniform bubble structure and a more delicate cell, with a cell size of several to several hundred microns and a tendency to be spherical, forming a more uniform foam structure.
[0004] Conformal foaming is a specific polyimide foaming technology that involves foaming according to a specific shape or structure. This technology is usually used to produce products with complex shapes or specific space-filling properties. Filling polyimide foam into a rod can greatly improve the bending modulus of the rod.
[0005] Microwave technology and infrared heating technology have been applied to the preparation of polyimide foam materials. Microwave heating can produce a spherical heat field, has the advantages of fast heating speed and low energy consumption, and can uniformly heat the foam material without causing layering of the foam morphology as with single-directional heat sources. Infrared heating technology has the advantages of high efficiency and controllable temperature. Compared with traditional heating methods, infrared energy has higher utilization efficiency, does not require preheating, and can quickly achieve heating effects. Therefore, microwave heating and infrared heating have unparalleled advantages for the manufacture of large-volume foam materials.
[0006] However, existing polyimide foaming equipment uses extrusion foaming and injection molding foaming, and when conformal foaming is performed, there are usually problems such as poor foaming uniformity, low processing efficiency, and poor adaptability. Therefore, a polyimide foaming equipment that can efficiently and uniformly conformally foam a rod in space is needed. SUMMARY
[0007] The polyimide foaming equipment can efficiently and uniformly foam the rod in space.
[0008] To achieve the above object, the present application adopts the following technical scheme: a polyimide foaming equipment for shape foaming of a pipe in space, comprising an outer cavity, an inner cavity, a microwave-infrared integrated device, a rotating mechanism, a swinging mechanism, a control cabinet and a fan, the inner cavity is fixed in the outer cavity through an inner cavity frame and a bearing, the microwave-infrared integrated device is fixed on the inner cavity wall through bolts to introduce heat into the inner cavity, the rotating mechanism is fixed on the inner cavity frame, the swinging motor is fixed at the bottom of the outer cavity, and the control cabinet and the fan are fixed outside the outer cavity.
[0009] Before foaming, the polyester amine salt powder is uniformly placed in the carbon fiber rod pipe cavity, and the carbon fiber rod pipe cavity is placed in the shaping device and fixed through a quick-release clamp. In the weightless environment in space, the polyester amine salt powder will float disorderly in the carbon fiber rod pipe cavity. During the foaming process, the rotating motor rotates, passes through the shaft coupling and the speed reducer, drives the rod through the shaft sleeve to rotate at a set speed, the swinging motor drives the inner cavity frame and the entire inner cavity to swing through the belt drive, so that the polyester amine salt powder is uniformly distributed in the rod pipe cavity; the microwave-infrared integrated device performs microwave heating on the working area, and the foaming treatment is performed at 70-160 DEG C for 1-2 h; the fan runs the nitrogen circulation system to provide a nitrogen environment; the outer wall of the shaping device has small holes to exhaust the gas generated during the foaming process; during the foaming process, the temperature controller, the pressure controller and the time controller in the control cabinet are used to monitor the temperature, humidity and pressure in the inner cavity to accurately control various parameters of the foaming process. After foaming, the polyimide foam is filled in the carbon fiber rod pipe cavity, improving the stiffness and strength of the rod. On the ground, the microwave-infrared integrated device can be used to perform infrared heating foaming on the working area during the foaming process.
[0010] The polyimide foaming equipment for shape foaming of a rod in space, the outer cavity is made of high-temperature-resistant ABS material, the outer side is connected with the fan and the control box, and the inner side is connected with the inner cavity through the bearing and the inner cavity frame.
[0011] The polyimide foaming equipment for the conformal foaming of a rod in space, the fan operation nitrogen circulation system provides a nitrogen environment, ensures uniform foaming, reduces byproduct production, and helps to maintain the structure and performance of the material during high-temperature foaming.
[0012] The polyimide foaming equipment for the conformal foaming of a rod in space, the control cabinet contains a temperature controller, a pressure controller and a time controller to accurately control various parameters of the foaming process, the operation of the equipment is controlled by controlling the heating of the microwave infrared integrated device, the operation of the fan, the rotation of the rotating mechanism and the swing of the swing mechanism, and the normal and stable operation of the equipment is ensured.
[0013] The polyimide foaming equipment for the conformal foaming of a rod in space, the inner cavity is made of high-temperature-resistant lightweight alumina fiber material, the outer side is connected with the outer cavity and the swing mechanism, and the inner side is connected with the microwave infrared integrated device and the rotating mechanism.
[0014] The polyimide foaming equipment for the conformal foaming of a rod in space, the inner cavity frame is fixed with the inner cavity, the inner cavity is connected with the outer cavity through a bearing, the belt pulley on the inner cavity frame is rotated by the swing motor of the swing mechanism, and then the inner cavity swings.
[0015] The polyimide foaming equipment for the conformal foaming of a rod in space, the microwave infrared integrated device is fixed on the inner wall of the inner cavity by bolts, microwave heating is used for foaming in space, and infrared heating is used for foaming on the ground. There are temperature, humidity and pressure sensors in the inner cavity, according to the sensor data, the control cabinet controls the heating power of the microwave infrared integrated device, and then controls the foaming process.
[0016] The polyimide foaming equipment for the conformal foaming of a rod in space, the shaping device is placed on the shaft sleeve, the two ends are designed with quick-release clamps, and the spring locking pin is used for fixation, when disassembling, the shaping device can be released by pulling the spring locking pin. The shaping device is placed inside the rod. There are small holes in the outer wall of the shaping device, which can discharge the gas generated during the foaming process.
[0017] The polyimide foaming equipment for the conformal foaming of a rod in space, one end of the shaft sleeve is placed on the support through a bearing, and the other end is connected with the rotating mechanism through a key, the rotating mechanism drives the shaft sleeve to rotate, the shaft sleeve drives the shaping device to rotate, and then the carbon fiber rod realizes rotation, ensuring uniform heating during the foaming process.
[0018] The polyimide foaming equipment for the conformal foaming of a rod in space comprises a rotating mechanism, a swinging mechanism and an inner cavity.
[0019] The polyimide foaming equipment for the conformal foaming of a rod in space comprises a rotating mechanism, a swinging mechanism and an inner cavity.
[0020] The polyimide foaming equipment for the conformal foaming of a rod in space comprises a rotating mechanism, a swinging mechanism and an inner cavity.
[0021] The polyimide foaming equipment for the conformal foaming of a rod in space comprises a rotating mechanism, a swinging mechanism and an inner cavity.
[0022] The polyimide foaming equipment for the conformal foaming of a rod in space comprises a rotating mechanism, a swinging mechanism and an inner cavity.
[0023] Compared with the prior art, the polyimide foaming equipment for the conformal foaming of a rod in space has the following beneficial effects:
[0024] (1) The device has strong applicability and can be applied to the foaming of polyimide in space and the foaming of polyimide on the ground, and has a wide application prospect.
[0025] (2) The device uses a microwave infrared integrated device to heat, and has rapid heating, high foaming efficiency and low safety risk, and meets the green, energy-saving and efficient development.
[0026] (3) The device uses a microwave infrared integrated device, a swinging mechanism and a rotating mechanism to ensure that the polyester ammonium salt precursor powder is uniformly distributed in the rod, and improves the foaming quality.
[0027] (4) To adapt to the weightless environment, this equipment has precise foaming process control capabilities, automatically adjusts the speed of bubble generation and solidification, and ensures that high-quality foam materials can still be produced in space. Attached Figure Description
[0028] Figure 1 A schematic diagram of the appearance of a polyimide foaming device for conformal foaming of rods in space according to the present invention.
[0029] Figure 2 This invention provides a schematic diagram of the internal components of a polyimide foaming device for conformal foaming of rods in space.
[0030] Figure 3 This invention provides a front view schematic diagram of the inner cavity of a polyimide foaming device for conformal foaming of rods in space. Figure 2 AA section view
[0031] Figure 4 This invention provides a front sectional view of a polyimide foaming device for conformal foaming of rods in space. Figure 2 BB cross-sectional view
[0032] Figure 5 This invention relates to a schematic diagram of the inner cavity of a polyimide foaming device for conformal foaming of rods in space.
[0033] In the figure, the corresponding names of the attached reference numerals are: 1-outer cavity, 2-fan, 3-control cabinet, 4-inner cavity, 5-rotary motor, 6-coupling, 7-reducer, 8-inner cavity frame, 9-shaft sleeve, 10-support, 11-microwave infrared integrated device, 12-shaping device, 13-rear shaft sleeve, 14-pulley, 15-oscillating motor. Detailed Implementation
[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0035] This invention provides a polyimide foaming device for conformal foaming of rods in space, employing the following technical solution: a polyimide foaming device for conformal foaming of rods in space, such as... Figures 1-4 As shown, the system includes an outer cavity 1, an inner cavity 4, a microwave infrared integrated device 11, a rotating mechanism, a swinging mechanism, a control cabinet 3, and a fan 2. The inner cavity 4 is fixed to the outer cavity 1 by an inner cavity frame 8 and bearings. The microwave infrared integrated device 11 is fixed to the wall of the inner cavity 4 by bolts to introduce heat into the inner cavity. The rotating mechanism is fixed to the inner cavity frame 8. The swinging motor 15 is fixed to the bottom of the outer cavity 1. The control cabinet 3 and the fan 2 are respectively fixed to the outside of the outer cavity 1.
[0036] The polyimide foaming equipment for shape foaming of a rod in space, before foaming, polyester amine salt powder is uniformly placed in the carbon fiber rod pipe cavity, and the rod is placed in the shaping device 12 and fixed through the quick release clamp. In the weightlessness environment in space, the polyester ammonium salt powder will be randomly floating in the carbon fiber rod pipe cavity. In the foaming process, the rotating motor 5 rotates, passes through the shaft coupling 6, the speed reducer 7, drives the rod to rotate at 20-120 r / min through the shaft sleeve 9, the swing motor 15 drives the inner cavity frame 8 and the whole inner cavity 4 to swing through belt transmission, so that the polyester ammonium salt powder is uniformly distributed in the rod pipe cavity; the microwave infrared integrated device 11 is used for microwave heating on the working area, and the foaming treatment is carried out at 70-160 DEG C for 1-2 h; the fan 2 runs the nitrogen circulation system to provide a nitrogen environment; the outer wall of the shaping device 12 has a small hole, which can discharge the gas generated in the foaming process; in the foaming process, the temperature, humidity and pressure sensors in the inner cavity are monitored, and the temperature controller, pressure controller and time controller in the control cabinet 3 are used for accurately controlling various parameters of the foaming process, such as Figure 5 After foaming, the polyimide foam is filled in the carbon fiber rod pipe cavity, and the stiffness and strength of the rod are improved. On the ground, the microwave infrared integrated device 11 can be used for infrared heating foaming on the working area in the foaming process.
[0037] The polyimide foaming equipment for shape foaming of a rod in space, the outer cavity 1 is made of high-temperature-resistant ABS material, the outer side is connected with the fan 2 and the control cabinet 3, and the inner side of the outer cavity 1 is connected with the inner cavity 4 through bearings and the inner cavity frame 8.
[0038] The polyimide foaming equipment for shape foaming of a rod in space, the fan 2 runs the nitrogen circulation system to provide a nitrogen environment, ensures uniform foaming, reduces byproduct production, and helps to maintain the structure and performance of the material in the high-temperature foaming process.
[0039] The polyimide foaming equipment for shape foaming of a rod in space, the control cabinet 3 contains temperature controllers, pressure controllers and time controllers, which are used for accurately controlling various parameters of the foaming process, and the operation of the equipment is controlled by controlling the heating of the microwave infrared integrated device 11, the operation of the fan 2, the rotation of the rotating mechanism and the swing of the swing mechanism, so that the equipment can work normally and stably.
[0040] The polyimide foaming equipment for shape foaming of a rod in space, the inner cavity 4 is made of high-temperature-resistant lightweight alumina fiber material, the outer side is connected with the outer cavity 1 and the swing mechanism, and the inner side of the inner cavity 4 is connected with the microwave infrared integrated device 11 and the rotating mechanism.
[0041] The polyimide foaming equipment for the shape foaming of a rod in space, the inner cavity frame 8 is fixed with the inner cavity 4, the inner cavity 4 is connected with the outer cavity 1 through a bearing, the inner cavity frame 8 is rotated by the rotation of the pulley 14 driven by the swing motor 15 of the swing mechanism, and then the inner cavity is swung.
[0042] The polyimide foaming equipment for the shape foaming of a rod in space, the microwave infrared integrated device 11 is fixed on the inner wall of the inner cavity 4 by bolts, and is used for microwave heating in space foaming and infrared heating on the ground.
[0043] The polyimide foaming equipment for the shape foaming of a rod in space, the shaping device 12 is placed on the shaft sleeve 9, and the two ends are designed to be quickly disassembled and clamped by a spring lock pin.
[0044] The polyimide foaming equipment for the shape foaming of a rod in space, one end of the shaft sleeve 9 is placed on the support through a bearing, and the other end is connected with the rotating mechanism through a key.
[0045] The polyimide foaming equipment for the shape foaming of a rod in space, the rotating mechanism comprises a rotating motor 5, a shaft coupling 6 and a speed reducer 7.
[0046] The polyimide foaming equipment for the shape foaming of a rod in space, the swing mechanism comprises a swing motor 15, a pulley 14 and a belt.
[0047] The polyimide foaming equipment for the shape foaming of a rod in space, the inner cavity 4 and the outer cavity 1 are filled with heat insulation cotton.
Claims
1. A polyimide foaming apparatus for conformal foaming of tubing in space, characterized by: The outer cavity, the inner cavity, the microwave infrared integrated device, the rotating mechanism, the swing mechanism, the control cabinet and the fan, the inner cavity is fixed in the outer cavity through the inner cavity frame and the bearing, the microwave infrared integrated device is fixed on the inner cavity wall through the bolt coupling to introduce heat into the inner cavity, the rotating mechanism is fixed on the inner cavity frame, the swing motor is fixed on the bottom of the outer cavity, the control cabinet and the fan are fixed outside the outer cavity respectively; the polyester amine salt powder is uniformly placed in the carbon fiber rod piece tube cavity, and the carbon fiber rod piece tube cavity is placed in the shaping device and fixed through the quick release clamp.
2. A polyimide foaming apparatus for conformable foaming of tubing in space according to claim 1, wherein: The fan runs the nitrogen circulation system to provide a nitrogen environment, and the shaping device has small holes on the outer wall.
3. The polyimide foaming apparatus for conformable foaming of tubing in space of claim 1, wherein: The outer cavity is made of high-temperature-resistant ABS material.
4. The polyimide foaming apparatus for conformable foaming of tubing in space of claim 1, wherein: The inner cavity is made of high-temperature-resistant lightweight alumina fiber material, the inner cavity frame is fixed with the inner cavity, the inner cavity is connected with the outer cavity through the bearing, the inner cavity frame is driven to rotate by the swing motor of the swing mechanism, and then the inner cavity swings.
5. The polyimide foaming apparatus for conformable foaming of tubing in space of claim 1, wherein: The shaping device is placed on the shaft sleeve, and quick release clamps are designed at both ends and are fixed by spring locking pins.
6. A polyimide foaming apparatus for conformable foaming of tubing in space according to claim 5, wherein: One end of the shaft sleeve is placed on the support through the bearing, and the other end is connected with the rotating mechanism through the key, the rotating mechanism drives the shaft sleeve to rotate, and the shaft sleeve drives the shaping device to rotate.
7. The polyimide foaming apparatus for conformable foaming of tubing in space of claim 1, wherein: The rotating mechanism includes a rotating motor, a shaft coupling and a speed reducer, the rotating motor is fixed on the inner cavity frame, the output shaft of the rotating motor is connected with the shaft coupling, the shaft coupling is connected with the input shaft of the speed reducer, and the output shaft of the speed reducer is connected with the shaft sleeve through the flat key.
8. The polyimide foaming apparatus for conformable foaming of tubing in space of claim 1, wherein: The swing mechanism includes a swing motor, a pulley and a belt, the swing motor is fixed on the bottom surface of the outer cavity and is connected with the inner cavity frame through the pulley belt transmission to realize the swing of the inner cavity.
9. The polyimide foaming apparatus for conformable foaming of tubing in space of claim 1, wherein: The inner cavity and the outer cavity are filled with heat insulation cotton.
10. The polyimide foaming apparatus for conformable foaming of tubing in space of claim 1, wherein: The polyester amine salt powder is packaged with a film before being put into the carbon fiber rod piece tube cavity, the melting point of the film tube is lower than the foaming temperature of the polyester amine salt powder, the length of the film tube is equivalent to that of the carbon fiber rod piece tube cavity, the volume of the film cavity of the film tube is equivalent to that of the polyester amine salt powder, and the film tube packaged with the polyester amine salt powder is placed in the carbon fiber rod piece tube cavity, and the two are fixed in the shaping device.