Constant-temperature fused deposition modeling system based on carbon nano cloth

Abstract

The utility model provides a constant-temperature fused deposition modeling system based on carbon nano cloth, which comprises a shell and a fused deposition printing system, and the fused deposition printing system is positioned in an internal cavity of the shell; wherein each face of the shell is provided with a panel, so that an inner cavity of the shell forms a closed space, and the panels on the periphery of the shell are provided with a heat preservation system, so that the inner cavity of the shell is kept at a constant temperature; the thermal insulation system comprises a first carbon nano cloth layer, a second carbon nano cloth layer and a heating layer arranged between the first carbon nano cloth layer and the second carbon nano cloth layer; the heating layer comprises a plurality of heating devices connected in parallel, the heating devices are arranged in the printing deposition direction, a first distance is kept between every two adjacent heating devices, and a second distance is kept between the heating device located on the edge and the shell. According to the system disclosed by the utility model, the thermal insulation system consisting of the carbon nano cloth and the heating layer is arranged, so that the internal cavity is kept at constant temperature and balanced in temperature, the printing range is not influenced while the printing quality is improved, and the light weight and convenience of the whole system are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fused deposition molding, in particular to a constant temperature fused deposition molding system based on carbon nano cloth. Background Art

[0002] FDM 3D (Fused Deposition Modeling) is a common 3D printing technology, also known as fused deposition modeling, which builds three-dimensional objects by stacking molten plastic layer by layer. Compared with traditional processing methods, FDM 3D printing technology has the advantages of low cost, fast production speed, and the ability to manufacture complex structures.

[0003] Traditional FDM printers are generally open-type, and the ambient temperature for material molding is consistent with room temperature. After the material is extruded from the nozzle, it quickly cools to room temperature, resulting in a loose adhesion between the deposited layer and the printing platform. In addition, the internal stress of the material is relatively large after cooling and solidifying, and the molded material is prone to warping during the printing process.

[0004] In order to solve the above problems, the prior art uses a heat insulation baffle to reduce heat loss, so that the FDM printing system is located in an insulation chamber for printing. This ensures the temperature of the printing system to a certain extent, but this method cannot ensure balanced temperature rise, let alone a balanced temperature in the printing chamber during the insulation process. If the temperature around the printed sample is not balanced, it may cause defects on the sample. In addition, the use of a heat insulation board will increase the weight of the printer and limit the size of the printing area, thereby reducing the working range of the print head. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the prior art and provide a constant temperature fused deposition molding system based on carbon nanocloth. By arranging a thermal insulation system composed of carbon nanocloth and a heating layer on the outer shell, the internal chamber is heated up quickly and evenly, and a constant temperature is maintained during the subsequent printing process. The temperature distribution in the printing system is uniform and the temperature difference is small. The printing quality is improved without affecting the printing range, and the lightness and convenience of the entire system are ensured.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A constant temperature fused deposition modeling system based on carbon nanocloth comprises: a housing and a fused deposition printing system, wherein the fused deposition printing system is located in an internal chamber of the housing;

[0008] Wherein, each surface of the shell is provided with a panel so that the internal chamber of the shell forms a closed space, and the panels around the shell are provided with a heat preservation system so that the internal chamber of the shell maintains a constant temperature;

[0009] The heat preservation system comprises a first carbon nanocloth layer, a second carbon nanocloth layer, and a heating layer arranged between the first carbon nanocloth layer and the second carbon nanocloth layer; the heating layer comprises a plurality of heating devices arranged in an insulating high temperature resistant heat conductive substrate, the heating devices are arranged in parallel along a printing deposition direction and are located at different positions, and a first spacing is maintained between adjacent heating devices;

[0010] The heating layer is configured to maintain the internal chamber at a desired temperature when the heating layer is in operation, and to evenly insulate the internal chamber through the first carbon nanocloth layer and the second carbon nanocloth layer.

[0011] Preferably, the thickness of the first carbon nanocloth layer and the second carbon nanocloth layer are both 30-40 μm.

[0012] Preferably, the first spacing is set according to the thickness of the printed layer.

[0013] Preferably, the first distance ranges from 5 to 10 cm.

[0014] Preferably, the second interval ranges from 5 to 10 cm.

[0015] Preferably, the number of heating devices is set according to the size of the panel.

[0016] Preferably, the heating device is a heating wire.

[0017] Preferably, a plurality of temperature detection devices are provided in the internal chamber of the housing for detecting the instantaneous temperature of the internal chamber.

[0018] Preferably, the heating devices at different positions along the printing deposition direction can be independently and / or jointly controlled to perform temperature compensation so that the internal chamber maintains a constant temperature and temperature balance during the printing process.

[0019] Preferably, one of the panels around the housing is configured as an openable and closable structure, and is used as an inlet and outlet for workpieces.

[0020] Preferably, the constant temperature fused deposition modeling system is also provided with a feedback and control system for receiving instant temperature feedback and regulating the heating device for temperature compensation as required.

[0021] In combination with the carbon nanocloth-based constant temperature fused deposition molding system of the above embodiment, an insulation system consisting of a carbon nanocloth and a heating layer is arranged on the outer shell. By arranging the heating layer between two layers of carbon nanocloth, the internal chamber can be heated up rapidly while ensuring the temperature balance in the chamber. When the internal chamber rises to the required temperature, the double-layer carbon nanocloth keeps the internal chamber at a constant temperature during the subsequent printing process and ensures that the temperature distribution in the printing system is uniform. When the temperature of the internal chamber is insufficient or unbalanced, temperature compensation is performed by adjusting the heating device at the corresponding position, thereby ensuring that the temperature difference of the printing environment of the printing system is small and avoiding printing defects caused by temperature difference.

[0022] The utility model proposes a constant temperature fused deposition molding system based on carbon nanocloth, and the heating device is arranged along the printing deposition direction. During the printing process, the heating condition of the heating device is regulated in real time according to the printing position, so as to reduce the warping and deformation of the material caused by uneven cooling during the printing process. The adjacent heating devices are kept at a distance to avoid defects such as cracking and porosity caused by uneven local heating of the printed part, thereby improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a carbon nanocloth-based constant temperature fused deposition molding system of the utility model.

[0024] Figure 2 It is a structural schematic diagram of a carbon nanocloth-based constant temperature fused deposition molding system of the utility model.

[0025] Figure 3 It is a structural schematic diagram of the heat preservation system of the carbon nanocloth-based constant temperature fused deposition molding system of the utility model.

[0026] Figure 4 It is a schematic diagram of the heating layer structure of the thermal insulation system of the utility model.

[0027] Figure 5 It is a working schematic diagram of the constant temperature fused deposition molding system based on carbon nanocloth of the utility model.

[0028] Explanation of the accompanying drawings: 1. Shell; 11. First track; 12. Second track; 13. Third track; 14. Connecting rod; 2. Fused deposition printing system; 21. Print head; 22. Printing platform; 221. Temperature detection device; 3. Insulation system; 31. First carbon nanocloth layer; 32. Second carbon nanocloth layer; 33. Heating layer; 331. Heating device; 4. Feedback and control system; 5. Feeding system. DETAILED DESCRIPTION

[0029] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0030] Various aspects of the utility model are described in this disclosure with reference to the accompanying drawings, in which many illustrative embodiments are shown. The embodiments of the present disclosure are not necessarily intended to include all aspects of the utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways.

[0031] Constant temperature fused deposition modeling system based on carbon nanocloth

[0032] Combination Figure 1-4 As shown, in a preferred embodiment of the utility model, a constant temperature fused deposition modeling system based on carbon nanocloth is provided, comprising: a shell 1 and a fused deposition printing system 2, wherein the fused deposition printing system 2 is located in an internal chamber of the shell 1.

[0033] The outer shell 1 is a hollow frame, and each surface of the frame is provided with a panel so that the inner chamber of the outer shell 1 forms a closed space. The panels around the outer shell are provided with a heat preservation system 3 so that the inner chamber of the outer shell 1 maintains a constant temperature.

[0034] Furthermore, the insulation system 3 is arranged on a side of the panel close to the fused deposition printing system 2. It can be understood that the panel serves as a support for the insulation system and can be made of glass or other hard materials. It only needs to form an enclosed space in the internal cavity of the shell and support the insulation system at the same time. Epoxy AB glue can be used to smoothly adhere the insulation system 3 to the panel.

[0035] Preferably, one of the panels around the shell is configured as an openable and closable structure, used as an entrance and exit for workpieces. For example, the panel is configured as a double door that opens to the left and right, or a single door that opens only to one side, and a sealing piece is provided at the opening and closing so that the opening and closing meets the sealing requirements.

[0036] like Figure 3 As shown, the heat preservation system 3 includes a first carbon nanocloth layer 31 , a second carbon nanocloth layer 32 , and a heating layer 33 disposed between the first carbon nanocloth layer 31 and the second carbon nanocloth layer 32 .

[0037] As an example, the first carbon nanocloth layer 31 and the second carbon nanocloth layer 32 are combined together in a woven form, and the heating layer 33 is built between the two carbon nanocloth layers.

[0038] The heating layer 33 allows the internal chamber to reach a desired temperature, and the first carbon nanocloth layer 31 and the second carbon nanocloth layer 32 are used to evenly insulate the internal chamber.

[0039] like Figure 4As shown, in one example, the heating layer 33 includes a plurality of heating devices 331. For example, the heating devices 331 may be electric heating devices, which are arranged in two layers of insulating high temperature resistant heat conductive substrates. In a preferred embodiment, the plurality of heating devices 331 are arranged along the printing deposition direction (such as Figure 4 The adjacent heating devices 331 are arranged in parallel (arrows in FIG. 1 ) and are located at different positions. A first spacing D1 is maintained between adjacent heating devices 331, and a second spacing D2 is maintained between the heating device located at the edge and the housing.

[0040] It should be understood that the insulating high temperature resistant heat conductive substrate can be a flexible material or a hard material, and can withstand a temperature of at least 250° C. under continuous use conditions. For example, polyimide film, silicone rubber and other materials can be used.

[0041] Optionally, the heating device 331 uses an electric heating wire, which can generate heat with a certain power after being powered on to achieve heating and temperature control of the internal chamber. By arranging in parallel along the printing deposition direction, each heating device can be regulated individually and / or in conjunction, including but not limited to adjusting its working state (on / off) and power to perform temperature compensation, so that the internal chamber maintains a constant temperature and temperature balance during the printing process.

[0042] The first distance between adjacent heating devices 331 is set according to the thickness of the printed layer, and the range of the first distance is preferably 5 to 10 cm, for example 7 cm.

[0043] The second distance between the heating device located at the edge and the housing is preferably 5-10 cm, for example 7 cm.

[0044] Through the above arrangement, the temperature difference in the printing system during the printing process is reduced, the printed part is heated evenly, the warping and deformation caused by uneven cooling of the material during the printing process are reduced, and defects such as cracks and pores caused by uneven local heating of the printed part are avoided.

[0045] Optionally, the distance between the two ends of the heating device 331 and the outer frame is also maintained at the second spacing, preferably 5 to 10 cm, and particularly preferably 7 cm.

[0046] Optionally, the number of heating devices 331 is configured according to the size of the panel and only needs to satisfy the above arrangement.

[0047] Optionally, the carbon nanocloth is made of commercially available materials, with a maximum temperature resistance of 300°C and a thickness of 30 to 40 μm, ensuring sufficient carbon nanotubes for precise temperature control.

[0048] The fused deposition printing system 2 can adopt existing technology. In one exemplary embodiment, it is combined with Figure 1 As shown, the fused deposition printing system 2 includes a print head 21 and a printing platform 22 disposed below the print head 2 .

[0049] The print head 21 is connected to a first movable device disposed on the housing, and the print head 21 is moved in a first direction and a second direction through the first movable device, and the first direction and the second direction are perpendicular to each other; the printing platform 22 is moved toward or away from the print head through a second movable device disposed on the housing.

[0050] The first moving device includes a first track 11 , a second track 12 and a third track 13 . The first track 11 and the second track 12 are arranged in parallel along the top of the housing 1 , and the third track 13 is arranged between the first track 11 and the second track 12 .

[0051] The upper end of the print head 21 is fixed on the third track 13 , and the print head 21 is made to slide back and forth along the third track 13 by a slider, so as to realize the movement of the print head in the first direction.

[0052] Two ends of the third track 13 are connected to the first track 11 and the second track 12 respectively. The third track 13 slides back and forth along the first track 11 and the second track 12 through a slider to achieve movement of the print head 21 in the second direction.

[0053] The second moving device includes a connecting rod 14 and a power screw arranged on the connecting rod. The connecting rod 14 is fixed to one side of the shell and is perpendicular to the first moving device. One end of the printing platform 22 is connected to the connecting rod 14, so that the printing platform 22 is parallel to the working end surface of the print head 21. The power screw is driven to rotate by the driving mechanism to drive the connecting rod 14 to rotate, thereby moving the printing platform 22 up and down.

[0054] The print head 21 is connected to the feeding system 5 , and a sealing member is provided at the connection between the feeding system and the panel to ensure the sealing of the internal chamber.

[0055] A plurality of temperature detection devices 221 are provided on the printing platform 22 to detect the temperature around the printed workpiece and feed back the real-time temperature to the feedback and control system 4 .

[0056] Working process of the constant temperature fused deposition modeling system based on carbon nanocloth

[0057] like Figure 5 As shown, after the mixed particle raw material is loaded into the feeding system 5, the heating layer 33 is turned on through the feedback and control system 4 to raise the temperature to the required temperature. After the temperature of the internal cavity is constant, part of the heating device can be turned off as needed, and the internal cavity is kept warm through the insulation system 3, and then the printing and molding is started according to the set program;

[0058] During the printing deposition process, the temperature of the internal chamber is monitored in real time by a temperature detection device. When the temperature of the internal chamber is insufficient or unbalanced, the heating device 331 of the corresponding area is turned on and / or off based on the temperature feedback to achieve temperature compensation, so that the temperature of the internal chamber is constant and balanced, and the temperature difference is controlled within 0.1°C to ensure printing quality.

[0059] The carbon nanocloth-based constant temperature fused deposition molding system of the utility model can be used to print materials including but not limited to PLA materials, ABS resin materials, PEEK materials, PEKK materials, nylon materials, PEI materials, PAEK materials, polycarbonate materials, polyimide materials, and polyetherimide materials. The printed molded parts have less warping and deformation, cracking, porosity and other defects, and the molded parts are of high quality.

[0060] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A constant temperature fused deposition modeling system based on carbon nanocloth, characterized in that: include: A housing (1) and a fused deposition printing system (2), wherein the fused deposition printing system (2) is located in an internal chamber defined by the housing (1); Each surface of the shell (1) is provided with a panel so that the internal chamber of the shell (1) forms a closed space, thereby constructing the internal chamber; the panels around the shell are provided with a heat preservation system (3) so that the internal chamber of the shell (1) maintains a constant temperature; The heat preservation system (3) comprises a first carbon nanocloth layer (31), a second carbon nanocloth layer (32), and a heating layer (33) arranged between the first carbon nanocloth layer (31) and the second carbon nanocloth layer (32); the heating layer (33) comprises a plurality of heating devices (331), the heating devices (331) are arranged in parallel along a printing deposition direction, and a first spacing is maintained between adjacent heating devices (331); The heating layer (33) is configured to maintain the internal chamber at a desired temperature when the heating layer (33) is in operation, and to evenly insulate the internal chamber through the first carbon nanocloth layer (31) and the second carbon nanocloth layer (32).

2. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: The thickness of the first carbon nanocloth layer (31) and the second carbon nanocloth layer (32) are both 30 to 40 μm.

3. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: The first spacing is set according to the thickness of the printed layer.

4. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: The first distance ranges from 5 to 10 cm.

5. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: The second distance ranges from 5 to 10 cm.

6. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: The number of heating devices (331) is set according to the size of the panel.

7. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: The heating device (331) is a heating wire.

8. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: A plurality of temperature detection devices (221) are arranged in the internal chamber of the housing (1) for detecting the real-time temperature of the internal chamber.

9. The carbon nanocloth-based constant temperature fused deposition modeling system according to any one of claims 1 to 8, characterized in that: The heating devices (331) at different positions along the printing deposition direction can be independently and / or linked to each other to perform temperature compensation, so that the internal chamber maintains a constant temperature and temperature balance during the printing process.

10. The carbon nanocloth-based constant temperature fused deposition modeling system according to claim 1, characterized in that: The constant temperature fused deposition modeling system is also provided with a feedback and control system (4) for receiving real-time temperature feedback and regulating the heating device for temperature compensation as required.

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