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CN-224210572-U - 3D prints mixing head

CN224210572UCN 224210572 UCN224210572 UCN 224210572UCN-224210572-U

Abstract

The utility model relates to an FDM printer, and discloses a 3D printing mixing head which comprises a feeding assembly, a heating assembly, a spray head and a cooling assembly, wherein the feeding assembly comprises a feeding pipe, a mounting seat and a venturi which are sequentially connected from top to bottom, a first channel is arranged on the mounting seat, a second channel is arranged on the venturi, the heating assembly is arranged at the bottom of the venturi and is provided with a heating channel and a mixing groove, the spray head is arranged at the mixing groove of the heating assembly and is communicated with the mixing groove, the cooling assembly is arranged on the mounting seat and is used for cooling the venturi and the spray head, the feeding pipe is provided with at least three feeding pipes, the number of the first channels, the number of the second channels and the number of the heating channels are the same and are communicated with each other in a one-to-one correspondence manner, the diameter of each heating channel is gradually increased from top to bottom, and the diameter of each heating channel is gradually decreased from top to bottom. The utility model can solve the problems of reducing the volume and improving the mixing uniformity of different raw materials.

Inventors

  • CHEN ZHIJIN
  • WANG SHENGBO
  • MENG XIANG
  • CHEN JIAQI
  • LIU YUHENG
  • FANG ZHONGMIN

Assignees

  • 厦门城市职业学院(厦门开放大学)

Dates

Publication Date
20260508
Application Date
20250609

Claims (8)

  1. 1. A 3D printing mix head, comprising: The feeding assembly comprises a feeding pipe, a mounting seat and a throat pipe which are sequentially connected from top to bottom, wherein a first channel is arranged on the mounting seat, and a second channel is arranged on the throat pipe; The heating assembly is arranged at the bottom of the throat pipe and is provided with a heating channel and a mixing groove, the heating assembly is used for heating and melting raw materials in the heating channel and the mixing groove, and the spray head is arranged at the mixing groove of the heating assembly and is communicated with the mixing groove; The cooling component is arranged on the mounting seat and used for cooling the throat pipe and the spray head; The feeding pipe is provided with at least three, the quantity of the feeding pipe, the first channels, the second channels and the heating channels are the same and are communicated in one-to-one correspondence, the discharging ends of the heating channels are communicated with the mixing tank, the diameter of the first channels is gradually increased from top to bottom, and the diameter of the heating channels is gradually reduced from top to bottom.
  2. 2. The 3D printing mixing head according to claim 1, wherein the feeding assembly further comprises a heat dissipation block, the heat dissipation block is arranged between the mounting seat and the throat and is provided with third channels, the first channels, the second channels and the third channels are the same in number and correspond to each other one by one, the third channels are used for communicating the corresponding first channels and second channels, and the heat dissipation block comprises a plurality of heat dissipation fin parts which are evenly distributed at intervals.
  3. 3. The 3D printing mix head of claim 2 wherein the cooling assembly comprises: The first cooling fan is arranged on the mounting seat and is opposite to the positions of the radiating block and the throat pipe, and the first cooling fan is used for cooling the radiating block and the throat pipe; The cooling device comprises a mounting seat, a first cooling fan and a cooling shell, wherein the cooling shell is arranged on the mounting seat and is provided with a cooling air channel, the first cooling fan is arranged on the cooling shell and is opposite to the air inlet of the cooling air channel, the air outlet of the cooling air channel is opposite to the spray head, and the cooling air channel is combined with the cooling shell to cool the spray head.
  4. 4. The 3D printing mixing head according to claim 3, wherein two second cooling fans and two diversion shells are arranged, and the two diversion shells are oppositely arranged on the first cooling fans in a bilateral symmetry mode.
  5. 5. The 3D printing mix head of claim 3 or 4 wherein the cooling assembly further comprises: The magnetic fixing block is arranged between the guide shell and the mounting seat, and is fixedly connected with the guide shell and the mounting seat so as to locate the guide shell on the mounting seat; The fan shell is fixedly arranged on the outer side of the first cooling fan and is in magnetic attraction connection with the magnetic attraction fixing block so as to enable the first cooling fan to be arranged on the mounting seat.
  6. 6. The 3D printing mix head of claim 2 wherein each of the feed tube, first channel, second channel, third channel and heating channel are arranged in a ring or star-like spaced arrangement.
  7. 7. The 3D printing mix head according to any one of claims 1, 2, 3, 4 and 6, wherein the heating assembly comprises a heating block, a heating rod and a thermistor, the heating block is provided with the heating channel and the mixing tank, the thermistor and the heating rod are both inserted on the heating block, the heating rod is used for heating raw materials in the heating channel and the mixing tank, and the thermistor is used for detecting an actual temperature value of the heating block.
  8. 8. The 3D printing mix head of claim 7 wherein an insulation layer is sleeved outside the heating block.

Description

3D prints mixing head Technical Field The utility model relates to an FDM printer, in particular to a 3D printing mixing head. Background In recent years, with rapid development of technology, 3D printing technology is gradually moving from the professional field to the mass consumer market. Among them, fused Deposition Modeling (FDM) technology is one of the most widely used 3D printing technologies by virtue of its advantages of relatively low equipment cost, simple operation, wide material selection, and the like. The FDM type 3D printer finally constructs the three-dimensional solid model by heating the thermoplastic wires (such as PLA, ABS, TPU and the like) to a molten state and extruding and stacking the thermoplastic wires layer by layer. However, the 3D printing mixing head of the conventional FDM type 3D printer usually adopts a single nozzle structure, which only supports wire printing with single color or single material property, and cannot meet the high-end application requirements of multi-material combination or color gradient. If color or multi-material printing is required, the existing solution relies on a multi-nozzle system, that is, wires with different colors or characteristics are extruded respectively by arranging a plurality of independent nozzles in parallel to realize material combination or color superposition. However, this solution has the following problems: firstly, the multi-nozzle scheme can obviously increase the volume of the 3D printing mixing head, so that the whole printing equipment occupies a larger space and is not suitable for desktop-level or compact application scenes. Second, the number of jets directly determines the number of colors or material types that can be supported, making it difficult for the color gradient and material combining capability to break through the limitations of the number of jets. And the defects of uneven color, unsatisfactory material characteristics and the like of a printed finished product can be caused by simple superposition and combination of materials or colors outside the spray head. In view of this, it is necessary to develop a 3D printing mix head to address the drawbacks of the conventional multi-jet scheme. Disclosure of utility model (One) solving the technical problems The utility model provides a 3D printing mixing head which at least can solve the technical problems of reducing the volume and improving the mixing uniformity of different raw materials. (II) technical scheme In order to solve the technical problems, the utility model provides the following technical scheme that the 3D printing mixing head comprises: The feeding assembly comprises a feeding pipe, a mounting seat and a throat pipe which are sequentially connected from top to bottom, a first channel is arranged on the mounting seat, and a second channel is arranged on the throat pipe; The heating assembly is arranged at the bottom of the throat pipe and is provided with a heating channel and a mixing groove, the heating assembly is used for heating and melting raw materials in the heating channel and the mixing groove, and the nozzle is arranged at the mixing groove of the heating assembly and is communicated with the mixing groove; the cooling component is arranged on the mounting seat and is used for cooling the throat pipe and the spray head; Wherein, the inlet pipe is equipped with at least three, and inlet pipe, first passageway, second passageway and heating channel's quantity is the same and one-to-one intercommunication, and the discharge end of each heating channel all communicates with the mixing tank, and the diameter from the top down of first passageway increases gradually and sets up, and the diameter from the top down of heating channel reduces gradually and sets up. Further set up, foretell feed assembly still includes the radiating block, and the radiating block is located between mount pad and the choke to be equipped with the third passageway, the quantity of first passageway, second passageway and third passageway is the same and the one-to-one, and the third passageway is used for the first passageway and the second passageway that correspond of intercommunication, and the radiating block includes a plurality of evenly spaced heat dissipation wing portions of arranging. Further provided, the aforementioned cooling assembly comprises: The first cooling fan is arranged on the mounting seat and is opposite to the positions of the radiating block and the throat pipe, and the first cooling fan is used for cooling the radiating block and the throat pipe; The second cooling fan and the guide shell are arranged on the mounting seat and are provided with guide air channels, the second cooling fan is arranged on the guide shell and is arranged opposite to the air inlet of the guide air channels, the air outlet of the guide air channels is arranged opposite to the spray head, and the second cooling fan and the guide shell are combined to be used f