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CN-121989447-A - Flexible screw extrusion type 3D printer

CN121989447ACN 121989447 ACN121989447 ACN 121989447ACN-121989447-A

Abstract

The invention relates to the field of 3D printing equipment, in particular to a flexible screw extrusion type 3D printer, which is used for directly plasticizing a solid material into a molten material and continuously extruding the molten material through arranging a material extruding device, receiving and three-dimensional printing of the molten material through arranging a 3D printing device, transmitting the molten material between the material extruding device and the 3D printing device through arranging a flexible connecting pipe, and solving the problems of overlarge loading on a platform, high motion inertia, limited dynamic printing precision and difficulty in improving printing speed caused by the fact that an extruding mechanism and a printing motion mechanism are highly integrated on the same mobile platform in the existing 3D printer.

Inventors

  • MA XIANGNUAN
  • CHEN WEIJIE

Assignees

  • 广州市哈尔技术有限公司

Dates

Publication Date
20260508
Application Date
20260311

Claims (10)

  1. 1. A flexible screw extrusion type 3D printer is characterized by comprising: the material extrusion device is used for plasticizing the solid material and continuously extruding the molten material; the 3D printing device is used for receiving the molten materials and executing three-dimensional printing; And one end of the flexible connecting pipe is connected with the discharge end of the material extruding device, and the other end of the flexible connecting pipe is connected with the feed end of the 3D printing device and is used for conveying molten materials between the material extruding device and the 3D printing device.
  2. 2. The flexible screw extrusion 3D printer as claimed in claim 1, wherein the 3D printing device comprises: A bracket; The 3D printing head is connected with the flexible connecting pipe and is used for extruding molten materials; The object carrying plate is used for carrying the printed 3D workpiece; The X-axis moving assembly is connected with the 3D printing head and used for driving the 3D printing head to move along the X-axis direction; the Y-axis moving assembly is arranged on the bracket and connected with the X-axis moving assembly and used for driving the X-axis moving assembly to move along the Y-axis direction; the Z-axis moving assembly is arranged on the bracket and connected with the carrying plate and used for driving the carrying plate to move along the Z-axis direction; the first controller is arranged on the bracket and is electrically connected with the X-axis moving assembly, the Y-axis moving assembly and the Z-axis moving assembly respectively.
  3. 3. The flexible screw extrusion 3D printer of claim 2, wherein said X-axis moving assembly comprises: A bottom plate arranged along the X-axis direction; The first sliding rod is arranged along the X-axis direction, and two ends of the first sliding rod are fixedly connected to the bottom plate; The first sliding block is connected to the first sliding rod in a sliding manner and is fixedly connected with the 3D printing head; the X-axis driving device is electrically connected with the first controller, the driving end is connected with the bottom plate, and the output end is in transmission connection with the first sliding block through the X-axis transmission assembly; the X-axis limit sensor is electrically connected with the first controller, arranged on the bottom plate and positioned on the same straight line with the first sliding block.
  4. 4. The flexible screw extrusion type 3D printer of claim 3, wherein the X-axis transmission assembly comprises a first synchronous wheel, a second synchronous wheel and a first synchronous belt, the first synchronous wheel is arranged at the output end of the X-axis driving device, the driving end of the X-axis driving device is connected to one end of the bottom plate, a supporting rod is arranged at the other end of the bottom plate, the second synchronous wheel is arranged at the top end of the supporting rod, and the first synchronous wheel, the second synchronous wheel and the first sliding block are in transmission connection through the first synchronous belt.
  5. 5. The flexible screw extrusion 3D printer of claim 3, wherein said Y-axis movement assembly comprises: the second slide bar is arranged along the Y-axis direction and is mutually perpendicular to the first slide bar, and two ends of the second slide bar are fixedly connected to the bracket; the second sliding block is fixedly connected with the bottom plate and is connected with the second sliding rod in a sliding way; The Y-axis driving device is electrically connected with the first controller, the driving end is connected with the bracket, and the output end is in transmission connection with the second sliding block through the Y-axis transmission assembly; the Y-axis limit sensor is electrically connected with the first controller, is arranged on the bracket and is positioned on the same straight line with the bottom plate.
  6. 6. The flexible screw extrusion type 3D printer according to claim 5, wherein the Y-axis transmission assembly comprises a first transmission shaft, a second transmission shaft, a third synchronizing wheel, a second transmission belt and a third transmission belt, wherein the first transmission shaft and the second transmission shaft are arranged along the X-axis direction, are respectively connected to the support in a rotating mode and are positioned on two sides of the first sliding rod, the first transmission shaft is provided with a fourth synchronizing wheel, two ends of the first transmission shaft are provided with fifth synchronizing wheels, two ends of the second transmission shaft are provided with sixth synchronizing wheels, the third synchronizing wheel is fixed to the output end of the Y-axis driving device, the second transmission belt is in transmission connection with the third synchronizing wheel and the fourth synchronizing wheel, and the third transmission belt is in transmission connection with the fifth synchronizing wheel, the sixth synchronizing wheel and the second sliding block.
  7. 7. The flexible screw extrusion 3D printer of claim 5, wherein the Z-axis movement assembly comprises: the Z-axis driving device is arranged on the bracket and is electrically connected with the first controller; One end of the screw rod is connected with the output end of the Z-axis driving device and is in threaded connection with the object carrying plate; The Z-axis limiting sensor is electrically connected with the first controller, is installed at the top of the support, and is provided with a limiting column at the top of the object carrying plate, and the sensing ends of the limiting column and the Z-axis limiting sensor are located on the same straight line.
  8. 8. The flexible screw extrusion 3D printer of claim 7, wherein the X-axis drive, the Y-axis drive and the Z-axis drive are rotating motors.
  9. 9. The flexible screw extrusion 3D printer as set forth in claim 1, wherein the material extrusion device comprises: A barrel for holding the material; The hopper is arranged at the feeding end of the machine barrel; the screw rod is accommodated in the machine barrel; The output end of the extrusion driving device is connected with one end of the screw rod and used for driving the screw rod to rotate; the heating component is arranged at the outer side of the discharging cylinder and is used for heating materials; And the second controller is used for controlling the extrusion process and is respectively and electrically connected with the extrusion driving device and the heating component.
  10. 10. The flexible screw extrusion type 3D printer according to claim 9, wherein the material extrusion device further comprises a melt pressure sensor, a temperature controller and a man-machine interaction display screen which are electrically connected with the second controller, the melt pressure sensor is arranged near a discharge hole of the machine barrel, and the temperature controller is electrically connected with the heating component.

Description

Flexible screw extrusion type 3D printer Technical Field The invention relates to the technical field of 3D printing equipment, in particular to a flexible screw extrusion type 3D printer. Background Currently, 3D printing technology is widely applied in the fields of industrial manufacturing, medical modeling, personalized customization and the like, and Fused Deposition Modeling (FDM) 3D printers are favored because of their simple structure and low cost. However, the existing mainstream FDM devices generally adopt a design scheme that an extrusion mechanism (including a motor, a gear, a heating block, a nozzle, and other components) and a printing motion mechanism (such as an X/Y axis sliding table) are highly integrated on the same moving platform. Although the integrated layout simplifies the mechanical structure, the whole mass of the mobile platform is obviously increased, so that larger motion inertia is brought. In the high-speed printing process, the high inertia not only limits acceleration and positioning response capability, but also easily causes vibration and interlayer dislocation, and the dynamic printing precision is seriously affected. Meanwhile, in order to avoid printing failure caused by overlarge inertia, the running speed of equipment is often forced to be reduced, and the improvement of the integral printing efficiency is restricted. Therefore, the extrusion mechanism and the printing motion mechanism of the existing 3D printer are highly integrated on the same mobile platform, so that the problems of overlarge loading of the platform, high motion inertia, limited dynamic printing precision and difficult lifting of printing speed are caused. Disclosure of Invention The problem of extrusion mechanism and printing motion mechanism high integration in same moving platform that current 3D printer exists lead to the platform heavy burden too big, motion inertia is high, the dynamic printing precision is limited and printing speed is difficult to promote is solved. The invention provides a flexible screw extrusion type 3D printer which comprises a material extrusion device, a 3D printing device and a flexible connecting pipe, wherein the material extrusion device is used for plasticizing a solid material and continuously extruding a molten material, the 3D printing device is used for receiving the molten material and executing three-dimensional printing, one end of the flexible connecting pipe is connected with a discharge end of the material extrusion device, the other end of the flexible connecting pipe is connected with a feeding end of the 3D printing device, and the flexible connecting pipe is used for conveying the molten material between the material extrusion device and the 3D printing device. The 3D printing device comprises a support, a 3D printing head, a carrying plate, an X-axis moving assembly, a Y-axis moving assembly, a Z-axis moving assembly and a first controller, wherein a feeding hole of the 3D printing head is connected with a flexible connecting pipe, the 3D printing head is used for extruding molten materials, the carrying plate is used for carrying printed 3D workpieces, the X-axis moving assembly is connected with the 3D printing head and is used for driving the 3D printing head to move along the X-axis direction, the Y-axis moving assembly is arranged on the support and is connected with the X-axis moving assembly, the Y-axis moving assembly is used for driving the X-axis moving assembly to move along the Y-axis direction, the Z-axis moving assembly is arranged on the support and is connected with the carrying plate, and the Z-axis moving assembly is used for driving the carrying plate to move along the Z-axis direction. The X-axis moving assembly comprises a base plate, a first sliding rod, a first sliding block, an X-axis driving device and an X-axis limiting sensor, wherein the base plate is arranged along the X-axis direction, the first sliding rod is arranged along the X-axis direction, two ends of the first sliding rod are fixedly connected to the base plate, the first sliding block is connected to the first sliding rod in a sliding mode and is fixedly connected with the 3D printing head, the X-axis driving device is electrically connected with the first controller, the driving end of the X-axis driving device is connected to the base plate, the output end of the X-axis driving device is in transmission connection with the first sliding block through the X-axis transmission assembly, the X-axis limiting sensor is electrically connected with the first controller, and the X-axis limiting sensor is arranged on the base plate and is positioned on the same straight line with the first sliding block. Preferably, the X-axis transmission assembly comprises a first synchronous wheel, a second synchronous wheel and a first synchronous belt, wherein the first synchronous wheel is arranged at the output end of the X-axis driving device, the driving end of the X-axis dr