An automatic opening and closing filtering exhaust mechanism applied to fused deposition 3D printing

Abstract

The utility model discloses an automatic open and close filter exhaust mechanism for fused deposition 3D printing, which comprises a host computer, a steering engine, a rotating push rod, a connecting rod and a louver, the side of the host computer is provided with a protruding fixing table, one side of the fixing table is provided with a clamping groove, the inside of the host computer is provided with a cavity, and the end face of the host computer is provided with a ventilation opening; the steering engine is connected with the fixing table through fasteners; the rotating push rod has a first connecting arm and a second connecting arm, the first connecting arm can be clamped in the clamping groove, one end of the second connecting arm is provided with a clamping table, and the steering engine can drive the rotating push rod to rotate; the connecting rod is fixed to one side of the host computer, the connecting rod is provided with a vertical moving groove, the clamping table can be clamped in the moving groove, and the clamping table can move up and down in the moving groove under the action of the rotating push rod; the connecting rod is provided with uniformly distributed fixing holes; one side of the louver is provided with an L-shaped support, one end of the L-shaped support can be inserted into the fixing hole, and the L-shaped support can rotate in the fixing hole.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printing technology, and specifically relates to an automatic opening and closing filter exhaust mechanism applied to fused deposition modeling 3D printing. Background Technology

[0002] Fused Deposition Modeling (FFF), a mainstream 3D printing technology, is widely used in industrial manufacturing, medical, educational, and personal creative fields. Its basic principle is to heat thermoplastic material to a molten state through a heated nozzle, extruding and stacking it layer by layer to ultimately construct a three-dimensional solid. During the printing process, the internal temperature environment of the equipment has a crucial impact on print quality.

[0003] However, most existing FFF 3D printers suffer from significant technical deficiencies in their temperature control design, making them ill-suited for printing diverse materials. Currently, most 3D printers on the market employ a fixed structural design, typically featuring fixed ventilation holes or mesh windows on the chassis. Some machines are equipped with manually operated fans or simple temperature control systems. This design exhibits clear limitations when dealing with different materials: when printing common materials (such as PLA and ABS), the machine requires excellent heat dissipation to prevent excessive internal temperatures, avoiding poor interlayer adhesion or deformation due to insufficient material cooling; while when printing high-temperature engineering materials (such as PEEK, PEI, and nylon), the machine needs to maintain a high-temperature, sealed environment to prevent problems such as internal stress, cracking, or decreased adhesion caused by rapid material cooling. Existing technology lacks an intelligent exhaust system that can automatically adjust ventilation based on material type, forcing users to manually adjust fans, close vents, or install insulation covers when changing materials—a cumbersome and error-prone process.

[0004] Furthermore, manual adjustment cannot achieve precise temperature control, easily causing temperature fluctuations that affect printing accuracy and finished product quality. More seriously, some devices, due to ineffective sealing during high-temperature printing, experience continuous heat loss, making it difficult to maintain the printing platform temperature and directly impacting printing success rates. Therefore, the problems of poor material adaptability, inaccurate temperature control, complex operation, and low printing efficiency in existing technologies have become key technical bottlenecks restricting the intelligent and universal development of 3D printing equipment. How to design an intelligent mechanism that can automatically identify printing materials and dynamically adjust exhaust and heat preservation states has become a pressing technical challenge in this field. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a 3D printing exhaust mechanism that can automatically open and close louvers and link the start and stop of the fan according to the type of printing material, so as to realize intelligent control of the internal temperature of the equipment, improve printing quality, material compatibility and automation level.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: an automatic opening and closing filter exhaust mechanism for fused deposition modeling 3D printing, comprising: a main unit, a protruding fixing platform on the side of the main unit, a slot on one side of the fixing platform, a cavity inside the main unit, and a ventilation port on the end face of the main unit;

[0007] A servo motor, which is connected to the fixed platform via fasteners;

[0008] A rotating push rod is provided, which has a first connecting arm and a second connecting arm. The first connecting arm can be engaged in the slot, and one end of the second connecting arm is provided with a locking platform. The servo motor can drive the rotating push rod to rotate.

[0009] A connecting rod is fixed to one side of the main unit. The connecting rod has a vertical moving groove, and the locking platform can be locked into the moving groove. Under the action of the rotating push rod, the locking platform can move up and down in the moving groove. The connecting rod has evenly distributed fixing holes.

[0010] The blinds have an L-shaped support on one side, one end of which can be inserted into the fixing hole, and the L-shaped support can rotate in the fixing hole.

[0011] Compared to existing technologies, the advantages of this invention are as follows: This invention achieves automatic opening and closing control of the ventilation openings during fused deposition modeling (FDM) 3D printing through the coordinated design of the main unit, servo motor, rotating push rod, connecting rod, and louvers. The main unit, as the core carrier, provides precise mounting interfaces for the servo motor and rotating push rod through its protruding side mounting platform and slot, ensuring the stability of the mechanical transmission. The servo motor is fixed to the mounting platform with fasteners, and its driving force directly acts on the rotating push rod. The first connecting arm of the rotating push rod engages with the slot, and the mounting platform of the second connecting arm cooperates with the moving slot of the connecting rod to form a mechanical linkage structure. The fixing hole of the connecting rod inserts into the L-shaped support of the louvers, allowing the L-shaped support to rotate within the fixing hole, thereby converting the rotational motion of the servo motor into the opening and closing action of the louver blades. Through precise rotation angle control of the servo motor, the opening and closing degree of the louvers can adapt to the printing requirements of different materials. The snap-fit ​​design between the card slot and the first connecting arm, the sliding fit between the moving slot and the card table, and the rotating connection between the L-shaped support column and the fixing hole all adopt standardized mechanical interfaces, reducing gaps and wear between components and extending the service life of the equipment. Users do not need to manually adjust the ventilation openings; they only need to preset the material type in the software, and the system will automatically trigger the opening and closing of the louvers, simplifying the operation process and reducing human error. Through the dynamic adjustment of the louvers, the same equipment can seamlessly switch between printing modes for common materials (such as PLA) and special materials (such as ABS), expanding the application range of the equipment.

[0012] The aforementioned exhaust mechanism also includes a fan. The main unit has a fan vent on its upper part, and the fan can be embedded in the fan vent. The fan is located behind the louvers, and the fan vent is connected to the louvers.

[0013] In the aforementioned exhaust mechanism, a first fixing plate is provided on the back of the fan, the first fixing plate protruding from the end face of the fan, and screw holes are provided on the first fixing plate.

[0014] The aforementioned exhaust mechanism includes a rotating shaft on the louver, which is located on one side of the L-shaped support column and can be integrally formed with the louver.

[0015] In the aforementioned exhaust mechanism, the louver is provided with louvers, the upper end of the louvers is fixed to the ventilation opening of the main unit via the rotating shaft, and the side of the louvers is fixed to the connecting rod via the L-shaped support column.

[0016] In the aforementioned exhaust mechanism, the louvers are rotatable along the rotation axis. When the louvers are open, there is an air intake channel between the louvers and the vent. When the louvers are closed, the louvers cover the vent.

[0017] The exhaust mechanism described above has a second fixing plate on the back of the main unit, and the screw holes are provided on the second fixing plate.

[0018] The exhaust mechanism described above has a support cavity located below the main unit, and the support cavity has an L-shaped structure.

[0019] In the aforementioned exhaust mechanism, the louvers are rectangular in shape.

[0020] In the aforementioned exhaust mechanism, a positioning card is provided on the outer edge of the rear end face of the main unit, and the positioning card can be engaged with an external device. Attached Figure Description

[0021] Figure 1 This is one of the schematic diagrams of the exhaust mechanism structure according to an embodiment of the present utility model;

[0022] Figure 2 This is a second schematic diagram of the exhaust mechanism structure according to an embodiment of the present utility model;

[0023] Figure 3 This is the third schematic diagram of the exhaust mechanism structure according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the rotating push rod structure according to an embodiment of the present utility model;

[0025] The reference numerals are as follows: 100 Main unit, 110 Fixed platform, 111 Slot, 120 Cavity, 130 Ventilation port, 140 Fan port, 150 Second fixed plate, 160 Support cavity, 170 Positioning card, 200 Servo motor, 300 Rotating push rod, 310 First connecting arm, 320 Second connecting arm, 321 Slot, 400 Connecting rod, 410 Moving slot, 420 Fixing hole, 500 Louver, 510 L-shaped support column, 520 Rotating shaft, 530 Louver, 600 Fan, 610 First fixed plate, 620 Screw hole. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below, with reference to Figures 1 to 4 This utility model provides an automatic opening and closing filter exhaust mechanism for fused deposition modeling 3D printing, comprising: a main unit 100, a servo motor 200, a rotating push rod 300, a connecting rod 400, and louvers 500. A protruding fixing platform 110 is provided on the side of the main unit 100, and a slot 111 is provided on one side of the fixing platform 110. A cavity 120 is provided inside the main unit 100, and a vent 130 is provided on the end face of the main unit 100. The servo motor 200 is connected to the fixing platform 110 via fasteners. (See reference...) Figure 4The rotating push rod 300 has a first connecting arm 310 and a second connecting arm 320. The first connecting arm 310 can be engaged in the slot 111, and one end of the second connecting arm 320 is provided with a mounting plate 321. The servo motor 200 can drive the rotating push rod 300 to rotate. The connecting rod 400 is fixed to one side of the main unit 100. The connecting rod 400 is provided with a vertical moving slot 410. The mounting plate 321 can be engaged in the moving slot 410, and the mounting plate 321 can move up and down in the moving slot 410 under the action of the rotating push rod 300. The connecting rod 400 is provided with evenly distributed fixing holes 420. One side of the louver 500 is provided with an L-shaped support column 510. One end of the L-shaped support column 510 can be inserted into the fixing hole 420, and the L-shaped support column 510 can rotate in the fixing hole 420. This invention achieves automatic opening and closing control of the ventilation opening 130 during fused deposition modeling (FDM) 3D printing through the coordinated design of the main unit 100, servo motor 200, rotating push rod 300, connecting rod 400, and louver 500. The main unit 100, as the core carrier, provides precise mounting interfaces for the servo motor 200 and rotating push rod 300 via its side-protruding fixed platform 110 and slot 111, ensuring the stability of the mechanical transmission. The servo motor 200 is fixed to the fixed platform 110 with fasteners, and its driving force directly acts on the rotating push rod 300. The first connecting arm 310 of the rotating push rod 300 is engaged in the slot 111, and the locking platform 321 of the second connecting arm 320 cooperates with the moving slot 410 of the connecting rod 400 to form a mechanical linkage structure. The fixing hole 420 of the connecting rod 400 is inserted into the L-shaped support column 510 of the louver 500, allowing the L-shaped support column 510 to rotate within the fixing hole 420, thereby converting the rotational motion of the servo motor 200 into the opening and closing action of the louver 500 blades. Through precise rotation angle control of the servo motor 200, the opening and closing degree of the louver 500 can adapt to the printing needs of different materials. The snap-fit ​​design between the slot 111 and the first connecting arm 310, the sliding fit between the moving slot 410 and the slot table 321, and the rotational connection between the L-shaped support column 510 and the fixing hole 420 all adopt standardized mechanical interfaces, reducing gaps and wear between components and extending the service life of the equipment. Users do not need to manually adjust the vent 130; they only need to preset the material type through software, and the system can automatically trigger the opening and closing action of the louver 500, simplifying the operation process and reducing human error. Through the dynamic adjustment of the louver 500, the same equipment can seamlessly switch between printing modes for common materials (such as PLA) and special materials (such as ABS), expanding the application range of the equipment.

[0027] Furthermore, the exhaust mechanism proposed in this application also includes a fan 600. A fan vent 140 is provided on the upper part of the main unit 100, and the fan 600 can be embedded in the fan vent 140. The fan 600 is located behind the louvers 500, and the fan vent 140 communicates with the louvers 500. The fan 600 is embedded in the fan vent 140 on the upper part of the main unit 100, located behind the louvers 500, and communicates with the ventilation opening 130, forming an airflow guiding channel. When the louvers 500 are open, the fan 600 starts to accelerate airflow, effectively expelling particulate matter and volatile organic compounds (VOCs) generated during the printing process, reducing the health risks to operators, and preventing contaminant deposition that could affect printing accuracy. When the louvers 500 are closed, the fan 600 stops working, reducing heat loss and ensuring that the internal temperature of the main unit 100 remains stable within the high-temperature range required by the special material (such as ABS), thereby preventing problems such as warping and poor interlayer bonding. The connection between the fan vent 140 and the louver 500 ensures that airflow is discharged along a fixed path, preventing turbulent airflow from causing the printing material to cool too quickly or overheat in certain areas, thus improving the surface quality and dimensional accuracy of the printed product. The fan 600 only operates when the louver 500 is open, reducing unnecessary energy consumption; at the same time, the linkage design between the fan 600 and the louver 500 reduces operating noise and improves the operating environment.

[0028] Furthermore, referring to Figure 3 A first fixing plate 610 is provided on the back of the fan 600. The first fixing plate 610 protrudes from the end face of the fan 600 and has screw holes 620. The screw holes 620 of the first fixing plate 610, protruding from the end face of the fan 600, cooperate with the fixing structure of the host 100 to form a double fixing point. The structural design of the fixing plate disperses the vibration stress of the fan 600 during operation, preventing loosening or component detachment due to vibration, and ensuring the long-term stable operation of the fan 600. The first fixing plate 610 can also be connected to other external devices. Further, refer to... Figure 1 and Figure 2The louver 500 is equipped with a rotating shaft 520, located on one side of the L-shaped support column 510. The rotating shaft 520 is integrally formed with the louver 500. The louver 500 has louvers 530, the upper end of which is fixed to the ventilation opening 130 of the main unit 100 via the rotating shaft 520. The side of the louver 530 is fixed to the connecting rod 400 via the L-shaped support column 510. The rotating shaft 520, serving as the rotation center of the louver 500, is integrally formed with the L-shaped support column 510, eliminating the loose connection problems that may occur in traditional split designs. The integrally formed rotating shaft 520 and L-shaped support column 510 form a rigid connection, reducing frictional resistance during rotation and extending the service life of the louver 500. The precision machining of the rotating shaft 520 ensures that the louvers 500 are tightly closed, effectively preventing external air from entering the main unit 100 and maintaining a high-temperature environment. The integrated design reduces the number of parts and assembly steps, lowering production costs and improving equipment consistency. The upper end of the louver 530 is fixed to the vent 130 of the main unit 100 via a rotating shaft 520, and the side is fixed to the connecting rod 400 via an L-shaped support column 510. This dual fixing by the rotating shaft 520 and the L-shaped support column 510 prevents the louver 500 from shifting due to external forces or vibrations, ensuring precise control of the opening and closing angle of the vent 130. The sliding fit between the L-shaped support column 510 and the connecting rod 400 allows the louver 500 to move smoothly in the vertical direction, while the rotational freedom of the rotating shaft 520 ensures flexible opening and closing of the blades, meeting dynamic adjustment requirements.

[0029] Furthermore, the louver 530 can rotate along the rotation axis 520. When the louver 500 is open, there is an air intake channel between the louver 530 and the vent 130. When the louver 500 is closed, the louver 530 covers the vent 130. The ventilation mode automatically switches according to material characteristics, accelerating heat dissipation when printing ordinary materials and maintaining heat when printing special materials, significantly improving printing success rate and finished product quality. In the closed state, heat loss is reduced, lowering energy consumption; in the open state, airflow is precisely controlled to avoid excessive cooling that could degrade material performance. Furthermore, refer to... Figure 3The main unit 100 has a second fixing plate 150 on its back, with screw holes 620. The second fixing plate 150 is rigidly connected to the main unit 100 body, providing additional mounting points. The second fixing plate 150 can distribute the force on the main unit 100, preventing structural deformation caused by long-term use or external impact. Furthermore, the main unit 100 can be connected to external devices via the second fixing plate 150. Further, a support cavity 160 with an L-shaped structure is provided below the main unit 100. The L-shaped structure can distribute ground pressure and enhance anti-tipping ability. The L-shaped structure of the support cavity 160 increases the contact area between the device and the ground, preventing shaking caused by vibration or uneven load during printing. In high-temperature or high-load environments, the structural design of the support cavity 160 can effectively absorb thermal expansion stress, preventing deformation of the main unit 100.

[0030] Furthermore, this application does not limit the specific shape of the louvers 530; preferably, the louvers 530 are rectangular. A regular geometric shape reduces airflow resistance, making the air intake of the vent 130 more uniform and avoiding localized overheating or cooling. At the same time, a standardized shape facilitates mass production, reduces mold costs, and improves production efficiency. Further, referring to… Figure 3 The rear end of the main unit 100 has a positioning card 170 on its outer edge, which can be snapped into an external device. The positioning card 170 at the rear of the main unit 100 simplifies the connection between the device and external systems. The snap-in function of the positioning card 170 ensures accurate installation positioning, and the snap-in design of the positioning card 170 allows for device alignment without additional tools, shortening installation time.

[0031] It should be noted that in the description of this utility model, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0032] In the description of this utility model, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is mentioned, it is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An automatic opening and closing filter exhaust mechanism for fused deposition modeling 3D printing, characterized in that, include: The host (100) has a protruding fixing platform (110) on its side, a slot (111) on one side of the fixing platform (110), a cavity (120) inside the host (100), and a vent (130) on the end face of the host (100). Servo motor (200), the servo motor (200) is connected to the fixed platform (110) by fasteners; A rotating push rod (300) is provided, which has a first connecting arm (310) and a second connecting arm (320). The first connecting arm (310) can be engaged with the slot (111), and one end of the second connecting arm (320) is provided with a mounting plate (321). The servo motor (200) can drive the rotating push rod (300) to rotate. A connecting rod (400) is fixed to one side of the main unit (100). The connecting rod (400) has a vertical moving groove (410). The locking platform (321) can be locked into the moving groove (410), and the locking platform (321) can move up and down in the moving groove (410) under the action of the rotating push rod (300). The connecting rod (400) has evenly distributed fixing holes (420). A louver (500) is provided on one side with an L-shaped support (510), one end of which can be inserted into the fixing hole (420) and can rotate in the fixing hole (420).

2. The exhaust mechanism according to claim 1, characterized in that, It also includes a fan (600), and the main unit (100) has a fan port (140) on its upper part. The fan (600) can be embedded in the fan port (140). The fan (600) is located behind the louver (500), and the fan port (140) is connected to the louver (500).

3. The exhaust mechanism according to claim 2, characterized in that, The fan (600) has a first fixing plate (610) on its back side. The first fixing plate (610) protrudes from the end face of the fan (600) and has screw holes (620) on it.

4. The exhaust mechanism according to claim 3, characterized in that, The louver (500) is provided with a rotating shaft (520), which is located on one side of the L-shaped support (510) and can be integrally formed with the louver (500).

5. The exhaust mechanism according to claim 4, characterized in that, The louver (500) is provided with louvers (530), the upper end of the louver (530) is fixed to the ventilation opening (130) of the host (100) through the rotating shaft (520), and the side of the louver (530) is fixed to the connecting rod (400) through the L-shaped support (510).

6. The exhaust mechanism according to claim 5, characterized in that, The louver (530) can rotate along the rotation axis (520). When the louver (500) is open, there is an air intake channel between the louver (530) and the vent (130). When the louver (500) is closed, the louver (530) covers the vent (130).

7. The exhaust mechanism according to claim 6, characterized in that, The back of the host (100) is provided with a second fixing plate (150), and the second fixing plate (150) is provided with the screw holes (620).

8. The exhaust mechanism according to claim 7, characterized in that, The host (100) is provided with a support cavity (160) below it, and the support cavity (160) has an L-shaped structure.

9. The exhaust mechanism according to claim 8, characterized in that, The louvers (530) are rectangular in shape.

10. The exhaust mechanism according to claim 9, characterized in that, The rear end face of the host (100) is provided with a positioning card (170), which can be snapped into an external device.

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