Partitioned hot bed gantry double printing head 3D printer and control method

Abstract

This invention discloses a partitioned heated bed gantry dual-printhead 3D printer and its control method. The 3D printer includes a printer body, an exhaust chamber assembly, a consumable storage box assembly, a display screen assembly, a printer structural frame assembly, a partitioned heated bed assembly, a Z-axis dual-motor drive assembly, a print chamber sealing assembly, and a dual-head gantry motion assembly. This invention, through the partitioned heated bed assembly, enables on-demand heating of the heated bed in different zones, thereby achieving precise temperature control of each zone, significantly reducing heat energy consumption, and adapting to the parallel printing requirements of dual printheads. The collaborative drive of the Z-axis dual stepper motors increases the magnetic resistance torque, effectively solving the problem of gantry sagging during power outages. The exhaust chamber assembly integrates multiple functions, optimizes the overall machine layout, and improves integration; combined with the sealed structure of the consumable storage box, it isolates moisture, ensures consumable dryness, improves print quality, and solves the problems of low equipment integration and susceptibility to moisture in consumables.

Description

Technical Field

[0001] This invention relates to the field of 3D printer technology, specifically to a partitioned heated bed gantry dual-printhead 3D printer and its control method. Background Technology

[0002] Fused Deposition Modeling (FDM) is a 3D printing method that uses various thermoplastic filament materials (such as PLA, ABS, and nylon) to form a 3D model. Its core principle involves feeding the thermoplastic material into an extruder, where it melts through a heated nozzle and is extruded. The extruded material fuses with the previous layer. After one layer is deposited, the printing platform or print head moves in predetermined increments to continue melt-blowing deposition until the entire solid part is printed. This technology is widely used in industrial manufacturing, model making, product development, and many other fields due to its low equipment cost, ease of operation, and broad material compatibility.

[0003] As 3D printing technology develops towards higher efficiency, higher precision, and more multifunctionality, the gantry dual-printhead structure, due to its ability to achieve parallel printing and improve printing efficiency, has gradually become an important development direction for FDM 3D printers. However, the inventors of this application have discovered through research that existing gantry dual-printhead FDM 3D printers have many significant shortcomings in practical applications, making it difficult to meet the printing requirements of high precision, low energy consumption, and high integration, as detailed below: First, traditional gantry dual-printhead 3D printers all use an integral heated bed as the support platform. This design has obvious shortcomings: on the one hand, the integral heated bed needs to heat the entire platform throughout the entire process. Even when printing small parts or local areas, it still consumes a lot of electricity, resulting in high thermal energy consumption and low heat utilization. On the other hand, the integral heated bed has an uneven thermal field distribution, which is prone to thermal deformation, leading to a decrease in the flatness of the printing platform. This directly affects the dimensional accuracy and surface quality of the formed parts. At the same time, it cannot achieve on-demand heating according to the printing path and extrusion state, further increasing energy consumption and easily causing warping and deformation of the printed parts.

[0004] Secondly, the dual-printhead structure requires four stepper motors to drive the two printheads respectively, which significantly increases the weight of the entire gantry and shifts the center of gravity to the rear half of the gantry. Existing equipment often uses a single stepper motor to drive the Z-axis lifting, but the magnetic reluctance torque of a single stepper motor is relatively small. When all motors are turned off after printing, the magnetic reluctance torque cannot support the weight of the gantry, causing it to sag. This results in the printhead directly impacting the heated bed, damaging both the printhead and the heated bed, severely affecting the accuracy of subsequent prints, and shortening the equipment's lifespan.

[0005] Finally, the exhaust chambers of existing FDM 3D printers are mostly located separately at the rear of the printer, and are installed separately from the extruder, lighting components, etc., resulting in low equipment integration and a loose overall layout. This not only occupies more installation space but also increases the complexity of equipment assembly. At the same time, the consumable supply of existing equipment mostly adopts an open or semi-open structure, which makes the consumables easy to absorb moisture from the air, causing the consumables to soften and clump, affecting the extrusion smoothness and printing quality, and thus reducing the mechanical properties and surface precision of the printed parts. Summary of the Invention

[0006] In view of this, the present invention provides a partitioned heated bed gantry dual printhead 3D printer and control method to solve the technical problems of high energy consumption, gantry collapse during power failure, low integration, and easy moisture absorption of consumables in existing equipment, thereby improving the printing accuracy, operational reliability and practicality of the equipment.

[0007] One aspect of the present invention provides a partitioned heated bed gantry dual printhead 3D printer, comprising: a 3D printer body, an exhaust chamber assembly, a consumable storage box assembly, a display screen assembly, a printer structural frame assembly, a partitioned heated bed assembly, a Z-axis dual motor drive assembly, a print chamber sealing assembly, and a dual-head gantry motion assembly; The partitioned heating bed assembly includes a heating bed frame body, a PEI textured heating bed plate, a heating bed substrate, a mica isolation block, a heating bed connector, an isolation block base, and a heating bed plate positioning component. The heating bed frame body is fixedly installed on the frame body, providing rigid support for the entire heating bed assembly. Four heating bed substrates are used to achieve partitioned temperature control. Mica isolation blocks and isolation block bases are installed in the mounting holes on the back of each heating bed substrate and are integrally set on the heating bed frame body. The mica isolation blocks are used to achieve thermal isolation of the heating areas. The heating bed plate positioning component is installed on the heating bed frame body and located at the rear of the heating bed substrate, used to position the heating bed substrate. The PEI textured heating bed plate is laid on top of the heating bed substrate to improve the demolding effect of the printed parts and, in conjunction with the partitioned heating structure, reduce warping deformation of the printed parts. The heating bed connector is used to achieve fixed assembly and rigid connection between the heating bed frame body and the frame body.

[0008] Another aspect of the present invention provides a control method for the above-mentioned partitioned heated bed gantry dual printhead 3D printer, comprising: S101: Preheating Start. After the printer starts the printing program, the host computer receives the start command and controls all heating zones of the partitioned heating bed assembly to start synchronously and heat them to the preset temperature. At the same time, the printer head is heated until the print head and all heating bed zones reach the preset temperature. Then the printer enters the printing ready state and begins to execute the printing job. S102: Real-time monitoring. During the printing process, the host computer reads the real-time position data of the two print heads in the dual-head gantry motion assembly and monitors whether the extruder of the print head is in the filament extrusion state, so as to realize the synchronous monitoring of print head position and filament extrusion state. S103: Zone Judgment and Retention. When the printhead is detected to pass through a heating zone of the zoned heating bed assembly, the host computer immediately determines whether the corresponding extruder is in the filament extrusion state. If the extruder is extruding filament, the heated bed zone that has been passed is determined to be the zone required for printing. The host computer controls the zone to maintain the preset temperature and continues to maintain the working state. S104: Zone shutdown and subsequent temperature control. After the printer completes the first layer printing job, the host computer summarizes the monitoring data during the first layer printing process, filters out the hot bed zones that were not passed by the print head or passed by but did not extrude consumables, and controls these unused zones to stop heating. Only the hot bed zones used in the first layer printing are kept to maintain the preset temperature until the entire printing job is completed. After printing is completed, all working hot bed zones are controlled to gradually cool down. Once the temperature drops to the safe threshold, the hot bed control loop is shut down.

[0009] The partitioned heated bed gantry dual printhead 3D printer and control method provided by the present invention have the following beneficial effects: 1. By setting up a zoned heating bed component, the heated bed is heated in zones on demand, which greatly reduces heat energy consumption; the mica isolation block avoids heat interference, improves temperature control accuracy, and can reduce warping and deformation of printed parts, thus solving the technical defects of traditional integral heated beds.

[0010] 2. By using dual stepper motors to drive the Z-axis in tandem, the magnetic resistance torque is increased, which effectively solves the problem of the gantry falling when the power is off, avoids the print head from colliding with the heated bed, extends the equipment life, and ensures the Z-axis lifting accuracy.

[0011] 3. The exhaust chamber component integrates multiple functions, optimizes the overall layout of the machine, and improves the integration level; together with the sealed structure of the consumable storage box, it can isolate moisture, ensure the dryness of consumables, improve the printing quality, and solve the problems of low equipment integration and easy moisture absorption of consumables.

[0012] 4. The aluminum profile splicing frame components are rigid and lightweight, and the linear guide rails ensure accurate alignment of the dual printheads, adapting to parallel printing needs and improving efficiency; the overall layout is reasonable, the operation is convenient, the cost is controllable, and the practicality is strong.

[0013] 5. The zoned heated bed control method has a rigorous logic and combines energy saving and abnormal protection functions, which improves the safety of equipment operation and printing stability, and further ensures the quality of printed parts. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of a partitioned heated bed gantry dual printhead 3D printer provided in an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the exhaust chamber assembly; Figure 3 This is a structural schematic diagram of the consumables storage box assembly; Figure 4 This is a structural diagram of the display screen assembly; Figure 5 This is a structural diagram of the printer's frame components; Figure 6 This is a schematic diagram of a zoned heating bed assembly (excluding the PEI textured heating bed plate). Figure 7 A schematic diagram of a zoned heating bed assembly; Figure 8 This is a schematic diagram of the Z-axis dual-motor drive assembly; Figure 9 This is a structural diagram of the printing chamber sealing assembly; Figure 10 This is a schematic diagram of the structure of a dual-headed gantry motion assembly; Figure 11 A flowchart illustrating the control method for a partitioned heated bed gantry dual-printhead 3D printer provided in an embodiment of the present invention. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0016] Please see Figures 1 to 10 The embodiment of the present invention provides a partitioned heated bed gantry dual printhead 3D printer, including: a 3D printer body 1000, an exhaust chamber assembly 1100, a consumable storage box assembly 1200, a display screen assembly 1300, a printer structural frame assembly 1400, a partitioned heated bed assembly 1500, a Z-axis dual motor drive assembly 1600, a print chamber sealing assembly 1700, and a dual-head gantry motion assembly 1800.

[0017] The printer structural frame assembly 1400 serves as the mounting base for the entire device and is installed inside the 3D printer body 1000. The printer structural frame assembly 1400 includes an exhaust chamber crossbar 1401, a frame body 1402, a linear guide rail 1403, and a crossbar connector 1404. The frame body 1402 is assembled from multiple aluminum profiles and provides a rigid mounting base for the zoned heated bed assembly 1500, the dual-head gantry motion assembly 1800, and other supporting components. The linear guide rail 1403 is fixedly installed on the column of the frame body 1402, providing stable motion guidance for the dual-head gantry motion assembly 1800 and ensuring precise alignment of the dual print heads with each zone of the heated bed. The exhaust chamber crossbar 1401 is fixedly connected to the frame body 1402 through the crossbar connector 1404 and is jointly installed and fixed on the top of the frame body 1402 for assembling the exhaust chamber assembly 1100.

[0018] The partitioned heating bed assembly 1500 is installed in the middle of the printer structural frame assembly 1400, providing a support platform for the printed workpiece and enabling partitioned on-demand heating. The partitioned heating bed assembly 1500 includes a heating bed frame body 1501, a PEI textured heating bed plate 1502, a heating bed base plate 1503, a mica isolation block 1504, a heating bed connector 1505, an isolation block base 1506, and a heating bed plate positioning component 1507. The heating bed frame body 1501 is fixedly installed on the frame body 1402, providing rigid support for the entire heating bed assembly. In this embodiment, there are four heating bed base plates 1503. In practice, one or more heating bed base plates 1503 can be individually controlled to activate heating, thereby achieving partitioned temperature control. Mica isolation block 1504 and isolation block base 1506 are installed in the mounting holes on the back of 1503 and are integrally set on the heated bed frame body 1501. The mica isolation block 1504 is used to achieve thermal isolation of the heated bed heating area, avoid heat interference between different areas, and improve temperature control accuracy. The heated bed plate positioning component 1507 is installed on the heated bed frame body 1501 and located at the rear of the heated bed heating substrate 1503, and is used to achieve precise positioning of the heated bed heating substrate 1503. The PEI textured heated bed plate 1502 is laid on the heated bed heating substrate 1503 to improve the demolding effect of the printed parts and reduce the warping deformation of the printed parts in conjunction with the partitioned heating structure. The heated bed connector 1505 is used to achieve fixed assembly and rigid connection between the heated bed frame body 1501 and the frame body 1402.

[0019] The Z-axis dual-motor drive assembly 1600 is installed at the bottom of the printer structural frame assembly 1400 and connected to the partitioned heated bed assembly 1500. It drives the partitioned heated bed assembly 1500 to achieve high-precision lifting, ensuring accurate alignment of the dual printheads with each partition of the heated bed. This also solves the technical problems of uneven weight distribution in the gantry and impact damage during power outages caused by the dual printheads. The Z-axis dual-motor drive assembly 1600 includes a Z-axis dual-motor drive base cover 1601, two stepper motors 1602, and an idler wheel 1603. The components include a closed-loop synchronous belt 1604, a Z-axis reduction gearbox 1605, a Z-axis synchronous belt 1606, a large synchronous pulley 1607, an idler pulley fixing bolt 1608, a Z-axis dual-motor drive base front cover 1609, a front cover fixing bolt 1610, a stepper motor fixing bolt 1611, a tension idler pulley fixing bolt 1612, a tensioner body 1613, a tension knob 1614, a tensioning bolt 1615, and a small synchronous pulley 1616; the two stepper motors 1602 work together to increase the magnetic resistance torque and prevent the gantry frame from breaking. The electric drop mechanism ensures the reliability of equipment operation and printing accuracy; the Z-axis reduction gearbox 1605 is installed below the bottom corner of the frame body 1402; the large synchronous pulley 1607 is located inside the Z-axis reduction gearbox 1605, and the Z-axis synchronous belt 1606 is sleeved on the output shaft of the Z-axis reduction gearbox 1605; the idler pulley 1603 is installed on the rear cover 1601 of the Z-axis dual motor drive base by the idler pulley fixing bolt 1608, and is assembled to the tensioner body 1613 by the tension idler pulley fixing bolt 1612; the tensioning pulley... A tension bolt 1615 passes through the tension groove of the tensioner body 1613, with its head inserted into the groove and its tail fitted with a tension knob 1614. The front cover 1609 of the Z-axis dual-motor drive base is fixedly connected to the rear cover 1601 of the Z-axis dual-motor drive base by a front cover fixing bolt 1610. The two stepper motors 1602 are fixedly installed on the rear cover 1601 of the Z-axis dual-motor drive base by stepper motor fixing bolts 1611, providing power for Z-axis lifting and lowering, and simultaneously increasing the magnetic resistance torque to prevent the gantry from falling. The closed-loop synchronous belt 1604 is sleeved between the small synchronous pulley 1616 and the large synchronous pulley 1607 of the two sets of stepper motors 1602 to achieve stable power transmission. The large synchronous pulley 1607 is coaxially linked with the Z-axis synchronous belt 1606 to operate synchronously. Through the transmission ratio of the large and small synchronous pulleys, speed reduction and torque increase are effectively achieved, improving the Z-axis drive load-bearing capacity and operating stability.

[0020] The exhaust chamber assembly 1100 is installed on top of the printer structural frame assembly 1400, providing support for the stable operation of the partitioned heated bed assembly 1500. It integrates exhaust, filament extrusion, and lighting functions, improving equipment integration and solving the technical problem of low integration in common FDM 3D printers where the exhaust chamber is installed at the rear of the printer. It integrates two synchronous extruders and LED lights, making the overall structure more compact. Simultaneously, with an independent filament sealing box, it better ensures filament drying and improves print quality. The exhaust chamber assembly 1100 includes an exhaust pipe 1101, an exhaust chamber shell 1102, an exhaust chamber control board 1103, two stepper motors 1104, two synchronous filament extruders 1105, an exhaust chamber base connector 1106, a filament buffer 1107, an LED light bracket 1108, a pneumatic connector 1109, an exhaust fan 1110, an LED light 1111, and an exhaust chamber base 1112. The exhaust chamber assembly 1100 is installed above the printer structural frame assembly 1400, eliminating the need for conventional methods. The common rear-mounted design optimizes the installation position and improves integration, providing support for exhaust gas discharge and precise filament feeding during the printing process. The exhaust chamber base connector 1106 is connected to the exhaust chamber base 1112 and is jointly fixed to the printer structural frame assembly 1400. The exhaust chamber base 1112 is equipped with two stepper motors 1104, two filament synchronous extruders 1105, two pneumatic connectors 1109, and an exhaust fan 1110, integrating the synchronous extruders with the exhaust chamber, eliminating the need for a separate extruder mounting structure. An exhaust pipe 1101 is located above the exhaust fan 1110 to promptly discharge exhaust gas generated during printing. The exhaust chamber shell 1102 covers the exhaust chamber base 1112 and is fixedly connected to it, enclosing the components above the exhaust chamber base 1112. The LED light bracket 1108 is fixed below the exhaust chamber base 1112, and the LED light 1111 is mounted on the LED light bracket 1108, integrated with the exhaust chamber. The consumable buffer 1107 is configured such that its two ends are connected to the discharge port of the consumable synchronous extruder 1105 and the inlet of the pneumatic connector 1109, respectively, to achieve stable delivery of consumables. The exhaust chamber control board 1103 drives the two consumable synchronous extruders 1105, the exhaust fan 1110, and the LED light 1111, respectively, to provide supporting drive for equipment operation. At the same time, the exhaust chamber assembly 1100 and the independent sealed box of the consumable storage box assembly 1200 work together to isolate external moisture and ensure that the consumables are dry.

[0021] The dual-head gantry motion assembly 1800 is mounted on the printer structural frame assembly 1400 and is used to cooperate with the partitioned heated bed assembly 1500 to achieve multi-area parallel printing. It includes a motion structural frame 1801, an X-axis body 1803, a right print head 1802, a left print head 1804, a timing belt tensioner 1805, and a stepper motor 1806, a timing belt 1807, and a moving slider 1808 for driving the movement of the dual print heads. The moving slider 1808 slides in cooperation with the linear guide rail 1403 to ensure that the dual-head gantry motion assembly 1800 runs smoothly and is guided accurately. The X-axis body 1803 is fixed to the motion structure frame 1801. The left print head 1804 and the right print head 1802 are respectively mounted on the X-axis body 1803 via movable sliders. They are driven by stepper motors on both sides in conjunction with synchronous belts 1807 and synchronous belt tensioners 1805, so that the two print heads can move independently or collaboratively in the X-axis and Y-axis directions, accurately adapting to the partitioned printing needs of the partitioned heated bed assembly 1500 and improving printing efficiency.

[0022] The consumable storage box assembly 1200 is installed on the printer structural frame assembly 1400 to provide a stable supply of consumables for partitioned printing and to prevent the consumables from getting damp and affecting the printing quality. The consumable storage box assembly 1200 includes a pneumatic connector 1201, a Teflon tube 1202, a sealed box 1203, 3D printing consumables 1204, a consumable bracket 1205, and a sealed box support frame 1206. The sealed box support frame 1206 is fixedly installed on the printer structural frame assembly 1400, and the sealed box 1203 is placed inside the sealed box support frame 1206. The consumable bracket 1205 is provided inside the sealed box 1203, and the 3D printing consumables 1204 are installed on the consumable bracket 1205. A pneumatic connector 1201 is installed on the top cover of the sealed box 1203, and the Teflon tube 1202 is connected to the pneumatic connector 1201 to achieve stable delivery of consumables.

[0023] The display screen assembly 1300 is used to realize equipment parameter adjustment, zoned heated bed temperature control and printing process monitoring. It includes a display screen housing 1301, an LCD touch screen module 1302, a display screen bracket 1303, a bracket fixing seat 1304 and display screen buttons 1305. The LCD touch screen module 1302 is installed inside the display screen housing 1301, and the display screen housing 1301 is fixedly installed on the display screen bracket 1303. The bracket fixing seat 1304 is connected to the display screen bracket 1303 and is fixedly installed on the frame body 1402 together.

[0024] The printing chamber sealing assembly 1700 is used to seal the printing chamber, ensuring the temperature stability of the partitioned heated bed assembly 1500 and reducing heat loss. It includes an upper sealing plate 1701, a sealing plate hinge 1702, a left sealing plate 1703, a sealing plate center fixing member 1704, fixing bolts 1705, sealing plate corner fixing members 1706, a rear sealing plate 1707, a right sealing plate 1708, a door handle 1709, a front right sealing plate 1710, a door magnetic attraction movable member 1711, a door magnetic attraction fixing member 1712, and a front left sealing plate 1713. The upper sealing plate 1701 is fixedly installed above the frame body 1402 by four sealing plate corner fixing members 1706. The left sealing plate 1703 is fixed by four sealing plate corner fixing members 1706 and four sealing plate center fixing members. Component 1704 is fixedly installed on the left side of the frame body 1402; the right sealing plate 1708 is fixedly installed on the right side of the frame body 1402 through four sealing plate corner fixing components 1706 and four sealing plate middle fixing components 1704; the front right sealing plate 1710 and the front left sealing plate 1713 are respectively fixed to the right and left sides of the front of the frame body 1402 through three sealing plate hinges 1702; two door magnetic suction movable components 1711 are installed on each of the front right sealing plate 1710 and the front left sealing plate 1713, and the door magnetic suction movable components 1711 are all located on the upper and lower sides of the sealing plate near the frame body 1402; there are four door magnetic suction fixing components 1712, which are fixedly installed on the frame body 1402 corresponding to the positions of the door magnetic suction movable components 1711.

[0025] Please see Figure 11 Another embodiment of the present invention also provides a control method for the above-mentioned partitioned heated bed gantry dual-printhead 3D printer, used to achieve precise temperature control of each heating partition and adapt to the requirements of dual-printhead partitioned parallel printing. The method includes: S101: Preheating Start. After the printer starts the printing program, the host computer receives the start command and controls all heating zones of the partitioned heating bed assembly 1500 to start synchronously and heat them to the preset temperature. At the same time, the printer head is heated until the print head and all heating bed zones reach the preset temperature. Then the printer enters the printing ready state and begins to execute the printing job. S102: Real-time monitoring. During the printing process, the host computer reads the real-time position data of the two print heads in the dual-head gantry motion assembly 1800 in real time, and at the same time monitors whether the extruder of the print head is in the consumable extrusion state, so as to realize the synchronous monitoring of the print head position and the consumable extrusion state. S103: Zone judgment and retention. When the print head is detected to pass through a heating zone of the zoned heating bed assembly 1500, the host computer immediately judges whether the corresponding extruder is in the consumable extrusion state. If the extruder is extruding consumables, the heated bed zone that has been passed is determined to be the zone required for printing. The host computer controls the zone to maintain the preset temperature and continues to maintain the working state. S104: Zone shutdown and subsequent temperature control. After the printer completes the first layer printing job, the host computer summarizes the monitoring data during the first layer printing process, filters out the hot bed zones that were not passed by the print head or passed by but did not extrude consumables, and controls these unused zones to stop heating. Only the hot bed zones used in the first layer printing are kept to maintain the preset temperature until the entire printing job is completed. After printing is completed, all working hot bed zones are controlled to gradually cool down. Once the temperature drops to the safe threshold, the hot bed control loop is shut down.

[0026] In the control method, the preset temperature of each heating zone can be input through the LCD touch screen module 1302 of the display component 1300 or set through a preset printing program. The temperature adjustment range is 0-150℃, the temperature control accuracy is ±1℃, and it can be manually fine-tuned through the display button 1305 to adapt to the temperature control requirements of different printing materials. At the same time, the mica isolation block 1504 can effectively isolate the heat of each zone, avoid the affected heat of the working zone by the closed zone, and further reduce energy consumption.

[0027] In this embodiment, the control method further includes an abnormal protection step. When the host computer detects an abnormal temperature in a certain heated bed zone (higher than the preset upper limit or lower than the preset lower limit), or does not detect the printhead position or filament extrusion status signal, it immediately cuts off the heating power supply of the abnormal zone and issues an alarm prompt through the display screen component 1300. At the same time, it maintains the normal operation of the remaining normal zones and printing jobs to avoid affecting the overall printing process and improve the safety of equipment operation.

[0028] In summary, the partitioned heated bed gantry dual-printhead 3D printer and control method according to the above embodiments have the following beneficial effects: 1. By setting up a zoned heating bed component, the heated bed is heated in zones on demand, which greatly reduces heat energy consumption; the mica isolation block avoids heat interference, improves temperature control accuracy, and can reduce warping and deformation of printed parts, thus solving the technical defects of traditional integral heated beds.

[0029] 2. By using dual stepper motors to drive the Z-axis in tandem, the magnetic resistance torque is increased, which effectively solves the problem of the gantry falling when the power is off, avoids the print head from colliding with the heated bed, extends the equipment life, and ensures the Z-axis lifting accuracy.

[0030] 3. The exhaust chamber component integrates multiple functions, optimizes the overall layout of the machine, and improves the integration level; together with the sealed structure of the consumable storage box, it can isolate moisture, ensure the dryness of consumables, improve the printing quality, and solve the problems of low equipment integration and easy moisture absorption of consumables.

[0031] 4. The aluminum profile splicing frame components are rigid and lightweight, and the linear guide rails ensure accurate alignment of the dual printheads, adapting to parallel printing needs and improving efficiency; the overall layout is reasonable, the operation is convenient, the cost is controllable, and the practicality is strong.

[0032] 5. The zoned heated bed control method has a rigorous logic and combines energy saving and abnormal protection functions, which improves the safety of equipment operation and printing stability, and further ensures the quality of printed parts.

[0033] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A partitioned heated bed gantry dual-printhead 3D printer, characterized in that, include: The 3D printer body (1000), exhaust chamber assembly (1100), consumable storage box assembly (1200), display screen assembly (1300), printer structural frame assembly (1400), partitioned heated bed assembly (1500), Z-axis dual motor drive assembly (1600), printing chamber sealing assembly (1700), and dual-head gantry motion assembly (1800); The zoned heating bed assembly (1500) includes a heating bed frame body (1501), a PEI textured heating bed plate (1502), a heating bed base plate (1503), a mica isolation block (1504), a heating bed connector (1505), an isolation block base (1506), and a heating bed plate positioning component (1507). The heating bed frame body (1501) is fixedly installed on the frame body (1402) to provide rigid support for the entire heating bed assembly. There are four heating bed base plates (1503) for zoned temperature control. The mica isolation blocks (1504) and isolation block bases (1506) are installed in the mounting holes on the back of the heating bed base plates (1503). The entire structure is mounted on the heated bed frame body (1501), and the mica isolation block (1504) is used to achieve thermal isolation of the heated bed heating area; the heated bed plate positioning component (1507) is installed on the heated bed frame body (1501) and located at the rear of the heated bed heating substrate (1503) to achieve positioning of the heated bed heating substrate (1503); the PEI textured heated bed plate (1502) is laid on top of the heated bed heating substrate (1503) to improve the demolding effect of the printed parts and reduce the warping deformation of the printed parts in conjunction with the partitioned heating structure; the heated bed connector (1505) is used to achieve fixed assembly and rigid connection between the heated bed frame body (1501) and the frame body (1402).

2. The partitioned heated bed gantry dual printhead 3D printer according to claim 1, characterized in that, The Z-axis dual-motor drive assembly (1600) includes a Z-axis dual-motor drive base rear cover (1601), two stepper motors (1602), an idler wheel (1603), a closed-loop synchronous belt (1604), a Z-axis reduction gearbox (1605), a Z-axis synchronous belt (1606), a large synchronous pulley (1607), an idler wheel fixing bolt (1608), a Z-axis dual-motor drive base front cover (1609), a front cover fixing bolt (1610), a stepper motor fixing bolt (1611), a tensioning idler wheel fixing bolt (1612), and a tensioner body (…). 1613), tension knob (1614), tension bolt (1615), and small synchronous pulley (1616); the two stepper motors (1602) drive each other to increase the magnetic resistance torque; the Z-axis reducer (1605) is installed below the bottom corner of the frame body (1402); the large synchronous pulley (1607) is located inside the Z-axis reducer (1605), and the Z-axis synchronous belt (1606) is sleeved on the output shaft of the Z-axis reducer (1605); the idler pulley (1603) is fixed by the idler pulley fixing bolt (1608). The device is mounted on the rear cover (1601) of the Z-axis dual-motor drive base and assembled to the tensioner body (1613) via tension idler wheel fixing bolts (1612); the tension bolt (1615) passes through the tension groove of the tensioner body (1613), with its head inserted into the groove and its tail fitted with a tension knob (1614); the front cover (1609) of the Z-axis dual-motor drive base is fixedly connected to the rear cover (1601) of the Z-axis dual-motor drive base via front cover fixing bolts (1610); the two stepper motors (1602) are connected via step... The stepper motor fixing bolt (1611) is fixedly installed on the rear cover (1601) of the Z-axis dual motor drive base, providing power for Z-axis lifting and lowering, and simultaneously increasing the magnetic resistance torque; the closed-loop synchronous belt (1604) is sleeved between the small synchronous pulley (1616) and the large synchronous pulley (1607) of the two sets of stepper motors (1602), realizing stable power transmission; the large synchronous pulley (1607) is coaxially linked with the Z-axis synchronous belt (1606) to operate synchronously, and through the transmission ratio of the large and small synchronous pulleys, speed reduction and torque increase are achieved, improving the Z-axis drive load-bearing capacity and operating stability.

3. The partitioned heated bed gantry dual-printhead 3D printer according to claim 2, characterized in that, The exhaust chamber assembly (1100) includes an exhaust pipe (1101), an exhaust chamber shell (1102), an exhaust chamber control board (1103), two stepper motors (1104), two consumable synchronous extruders (1105), an exhaust chamber base connector (1106), a consumable buffer (1107), an LED light bracket (1108), a pneumatic connector (1109), an exhaust fan (1110), an LED light (1111), and an exhaust chamber base (1112); the exhaust chamber assembly (1100) is equipped with... Above the printer structural frame assembly (1400); the exhaust chamber base connector (1106) is connected to the exhaust chamber base (1112) and together fixed to the printer structural frame assembly (1400); the exhaust chamber base (1112) is equipped with two stepper motors (1104), two consumable synchronous extruders (1105), two pneumatic connectors (1109), and an exhaust fan (1110), realizing the integrated structure of the consumable synchronous extruder (1105) and the exhaust chamber; the exhaust fan (1110) An exhaust pipe (1101) is provided above the exhaust chamber to promptly discharge the exhaust gas generated during the printing process; the exhaust chamber shell (1102) covers the exhaust chamber base (1112) and is fixedly connected to the exhaust chamber base (1112), covering the components above the exhaust chamber base (1112); the LED lamp bracket (1108) is fixed below the exhaust chamber base (1112), and the LED lamp (1111) is mounted on the LED lamp bracket (1108) and integrated with the exhaust chamber; the consumable buffer... The two ends of (1107) are respectively connected to the discharge port of the consumable synchronous extruder (1105) and the feed port of the pneumatic connector (1109) to realize the stable delivery of consumables; the exhaust chamber control board (1103) drives the two consumable synchronous extruders (1105), the exhaust fan (1110), and the LED light (1111) to provide supporting drive for the operation of the equipment; at the same time, the exhaust chamber assembly (1100) and the independent sealed box of the consumable storage box assembly (1200) work together to isolate external moisture and ensure that the consumables are dry.

4. The partitioned heated bed gantry dual printhead 3D printer according to claim 3, characterized in that, The printer structural frame assembly (1400) serves as the installation foundation for the entire device, including an exhaust chamber crossbar (1401), a frame body (1402), a linear guide rail (1403), and a crossbar connector (1404). The frame body (1402) is assembled from multiple aluminum profiles, providing a rigid installation foundation for the zoned heating bed assembly (1500), the dual-head gantry motion assembly (1800), and other supporting components. The linear guide rail (1403) is fixedly installed on the column of the frame body (1402), providing stable motion guidance for the dual-head gantry motion assembly (1800) and ensuring precise alignment of the dual printheads with each zone of the heating bed. The exhaust chamber crossbar (1401) is fixedly connected to the frame body (1402) through the crossbar connector (1404) and is jointly installed and fixed on the top of the frame body (1402) for assembling the exhaust chamber assembly (1100).

5. The partitioned heated bed gantry dual printhead 3D printer according to claim 4, characterized in that, The dual-head gantry motion assembly (1800) is used in conjunction with the partitioned heated bed assembly (1500) to achieve multi-area parallel printing. It includes a motion structure frame (1801), an X-axis body (1803), a right print head (1802), a left print head (1804), a timing belt tensioner (1805), and a stepper motor (1806), a timing belt (1807), and a moving slider (1808) for driving the movement of the dual print heads. The moving slider (1808) slides in conjunction with the linear guide rail (1403) to ensure the dual-head... The gantry motion assembly (1800) operates smoothly and provides precise guidance. The X-axis body (1803) is fixed to the motion structure frame (1801). The left print head (1804) and right print head (1802) are respectively mounted on the X-axis body (1803) via sliding sliders. They are driven by stepper motors on both sides in conjunction with synchronous belts (1807) and synchronous belt tensioners (1805), enabling the dual print heads to move independently or collaboratively in the X-axis and Y-axis directions. This precisely adapts to the partitioned printing requirements of the partitioned heated bed assembly (1500) and improves printing efficiency.

6. The partitioned heated bed gantry dual printhead 3D printer according to claim 5, characterized in that, The consumable storage box assembly (1200) includes a pneumatic connector (1201), a Teflon tube (1202), a sealed box (1203), 3D printing consumables (1204), a consumable bracket (1205), and a sealed box support frame (1206). The sealed box support frame (1206) is fixedly installed on the printer structural frame assembly (1400), and the sealed box (1203) is placed inside the sealed box support frame (1206). The sealed box (1203) is equipped with a consumable bracket (1205), and the 3D printing consumables (1204) are installed on the consumable bracket (1205). A pneumatic connector (1201) is installed on the top cover of the sealed box (1203), and the Teflon tube (1202) is connected to the pneumatic connector (1201) to achieve stable delivery of consumables.

7. The partitioned heated bed gantry dual printhead 3D printer according to claim 6, characterized in that, The display screen assembly (1300) is used to realize equipment parameter adjustment, zoned heated bed temperature control and printing process monitoring. It includes a display screen housing (1301), an LCD touch screen module (1302), a display screen bracket (1303), a bracket fixing seat (1304), and display screen buttons (1305). The LCD touch screen module (1302) is installed inside the display screen housing (1301), and the display screen housing (1301) is fixedly installed on the display screen bracket (1303). The bracket fixing seat (1304) is connected to the display screen bracket (1303) and is fixedly installed on the frame body (1402).

8. The partitioned heated bed gantry dual printhead 3D printer according to claim 7, characterized in that, The printing chamber sealing assembly (1700) is used to seal the printing chamber, ensure the temperature stability of the partitioned heated bed assembly (1500), and reduce heat loss. It includes an upper sealing plate (1701), a sealing plate hinge (1702), a left sealing plate (1703), a sealing plate center fixing component (1704), fixing bolts (1705), sealing plate corner fixing components (1706), a rear sealing plate (1707), and a right sealing plate (1708). 708), door handle (1709), front right side sealing plate (1710), door magnetic locating component (1711), door magnetic fixing component (1712), and front left side sealing plate (1713); the upper sealing plate (1701) is fixedly installed on the top of the frame body (1402) by four sealing plate corner fixing components (1706); the left sealing plate (1703) is fixedly installed on the top of the frame body (1402) by four sealing plate corner fixing components (1706) and four sealing plate middle parts. The fastener (1704) is fixedly installed on the left side of the frame body (1402); the right sealing plate (1708) is fixedly installed on the right side of the frame body (1402) through four sealing plate corner fasteners (1706) and four sealing plate middle fasteners (1704); the front right sealing plate (1710) and the front left sealing plate (1713) are respectively fixed to the right and left sides of the front of the frame body (1402) through three sealing plate hinges (1702); two door magnetic suction movable parts (1711) are installed on each of the front right sealing plate (1710) and the front left sealing plate (1713), and the door magnetic suction movable parts (1711) are all located on the upper and lower sides of the sealing plate near the frame body (1402); there are four door magnetic suction fasteners (1712), which are fixedly installed on the frame body (1402) respectively, corresponding to the positions of the door magnetic suction movable parts (1711).

9. The control method for the partitioned heated bed gantry dual printhead 3D printer according to claim 8, characterized in that, include: S101: Preheating Start. After the printer starts the printing program, the host computer receives the start command and controls all heating zones of the partitioned heating bed assembly (1500) to start synchronously and heat them to the preset temperature. At the same time, the printer head is heated until the print head and all heating bed zones reach the preset temperature. Then the printer enters the printing ready state and begins to execute the printing job. S102: Real-time monitoring. During the printing process, the host computer reads the real-time position data of the two print heads in the dual-head gantry motion assembly (1800) and monitors whether the extruder of the print head is in the consumable extrusion state, so as to realize the synchronous monitoring of the print head position and the consumable extrusion state. S103: Zone judgment and retention. When the print head is detected to pass through a heating zone of the zoned heating bed assembly (1500), the host computer immediately judges whether the corresponding extruder is in the consumable extrusion state. If the extruder is extruding consumables, the heated bed zone that has been passed is the zone required for printing. The host computer controls the zone to maintain the preset temperature and continues to maintain the working state. S104: Zone shutdown and subsequent temperature control. After the printer finishes printing the first layer, the host computer summarizes the monitoring data during the first layer printing process, filters out the hot bed zones that were not passed by the print head or passed by but did not extrude consumables, and controls these unused zones to stop heating. Only the hot bed zones used in the first layer printing are kept to maintain the preset temperature until the entire printing job is completed. After printing is complete, control all working heated bed zones to gradually cool down, and shut down the heated bed control loop once the temperature drops to a safe threshold.

10. The control method for the partitioned heated bed gantry dual printhead 3D printer according to claim 9, characterized in that, The method also includes an abnormal protection step. When the host computer detects an abnormal temperature in a certain heated bed zone, or fails to detect the printhead position or filament extrusion status signal, it immediately cuts off the heating power to the abnormal zone and issues an alarm prompt through the display screen assembly (1300). At the same time, it maintains the normal operation of the remaining normal zones and printing jobs to avoid affecting the overall printing process and improve the safety of equipment operation.

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