CN-224210562-U - Hot end component of three-dimensional printer, three-dimensional printing head and three-dimensional printer

Abstract

A hot end assembly of a three-dimensional printer, a three-dimensional printing head and the three-dimensional printer comprise a heating component, a nozzle and a flow limiting valve, wherein the inner side of the heating component comprises a material flow passage for penetrating through consumable materials, the material flow passage forms a flow passage opening at an outlet of the heating component, the nozzle is internally provided with a discharging passage, the discharging passage is communicated with the flow passage opening, the flow limiting valve is arranged on the inner side of the discharging passage, the diameter of the flow limiting valve is larger than the diameter of an outlet of the nozzle or the diameter of the flow passage opening, the nozzle is blocked, and the consumable materials in a molten state are prevented from flowing out of the nozzle, so that leakage prevention of the three-dimensional printer is realized.

Inventors

• LIU HAO

Assignees

• 深圳拓竹科技有限公司

Dates

Publication Date

20260508

Application Date

20250318

Claims (15)

1. 1. A hot end assembly for a three-dimensional printer, comprising: the heat dissipation fins are arranged on the inner side of the heat dissipation plate, The heating component is connected with the radiating fins, and the inner side of the heating component comprises a material flow passage for passing through consumable materials, and the material flow passage forms a flow passage opening at the outlet of the heating component; The nozzle is internally provided with a discharging channel which is communicated with the runner port; the flow limiting valve is arranged on the inner side of the discharging channel and is in sliding connection with the discharging channel, and the diameter of the flow limiting valve is larger than that of the flow channel opening.
2. 2. The hot end assembly of claim 1, further comprising a support member disposed inside the discharge channel; the support member is in contact with the restrictor valve.
3. 3. The hot end assembly of claim 2, wherein the inner side of the discharge channel is provided with a stepped surface toward the flow limiting valve, the support member comprises an elastic member, and the inner diameter of the elastic member is smaller than the diameter of the flow limiting valve; the elastic piece is arranged on the step surface and between the step surface and the flow limiting valve.
4. 4. The hot side assembly of claim 1, wherein the hot side assembly comprises a first magnetic member, the restrictor valve comprising a metal; The first magnetic piece is fixedly arranged on the periphery or the surface of the heating component, and the first magnetic piece is positioned on one side of the runner port away from the inlet of the nozzle.
5. 5. The hot end assembly of any one of claims 1-4, wherein the discharge passage comprises at least a first portion and a second portion, the first portion having an inner diameter greater than an inner diameter of the second portion; The first part is connected with the runner port, and the flow limiting valve is connected to the inner side of the first part in a sliding way; the second portion communicates with the outlet of the nozzle.
6. 6. The hot end assembly of claim 1, wherein the restrictor valve abuts the flow port in a natural state.
7. 7. A hot end assembly for a three-dimensional printer, comprising: the heat dissipation fins are arranged on the inner side of the heat dissipation plate, The heating component is connected with the radiating fins, and the inner side of the heating component comprises a material runner for penetrating through the consumable, and the material runner forms a runner port on the heating component; The nozzle is internally provided with a discharging channel, the discharging channel comprises a first part and a second part, and the inner diameter of the first part is larger than that of the second part; the flow limiting valve is connected to the inner side of the first part in a sliding way, and the diameter of the flow limiting valve is larger than the inner diameter of the second part.
8. 8. The hot end assembly of claim 7, wherein the first portion comprises a tubular discharge passage and the second portion comprises a funnel-shaped discharge passage.
9. 9. The hot end assembly of claim 8, wherein the surface of the tubular discharge passage is grooved and the diameter of the restrictor valve is less than the outer diameter of the tubular discharge passage.
10. 10. The hot end assembly of claim 9, wherein the diameter of the restrictor valve is equal to or greater than the inner diameter of the tubular discharge passage.
11. 11. The hot side assembly of claim 7, wherein the flow restrictor valve comprises a metal, the hot side assembly further comprising: And the second magnetic part is arranged around or on the surface of the nozzle corresponding to the flow limiting valve, and the second magnetic part slides along the length direction of the heating part.
12. 12. The three-dimensional printer hot side assembly of claim 7, wherein the restrictor valve comprises metal, the hot side assembly further comprising: The electromagnetic piece is fixedly connected to the outer side of the nozzle, is positioned on the same horizontal plane with the runner port and is used for forming suction force with the flow limiting valve when being electrified, and the electromagnetic piece acts on the suction force on the flow limiting valve to drive the flow limiting valve to move when the electromagnetic piece slides along the axial direction of the nozzle.
13. 13. The three-dimensional printer hot end assembly of any one of claims 1-12, wherein the restrictor valve is a spherical slider or a conical restrictor valve.
14. 14. A three-dimensional printhead comprising an extrusion structure and a hot side assembly of a three-dimensional printer according to any one of claims 1 to 6 or claims 7 to 13, the extrusion structure being adapted to transfer consumables to the hot side assembly.
15. 15. A three-dimensional printer comprising a printing platform and the three-dimensional printhead of claim 14, the three-dimensional printhead being disposed above the printing platform.

Description

Hot end component of three-dimensional printer, three-dimensional printing head and three-dimensional printer Technical Field The utility model relates to the field of additive manufacturing, in particular to a hot end component of a three-dimensional printer, a three-dimensional printing head and a three-dimensional printer. Background The nozzles of the three-dimensional printer heat the consumable material in a high temperature state to form a material in a molten state. The nozzle extrudes the melted material to create a print model. However, due to gravity, the material in a molten state naturally leaks out of the nozzle when printing is stopped. The missing material of the nozzle can cause defects in the printed model. Disclosure of utility model The utility model provides a hot end component of a three-dimensional printer, a three-dimensional printing head and the three-dimensional printer, which are used for solving the problem of nozzle leakage of the three-dimensional printer. A hot end assembly of a three-dimensional printer, comprising: A heating member, the inner side including a material flow passage for passing through a consumable, the material flow passage forming a flow passage opening at an outlet of the heating member; The nozzle is internally provided with a discharging channel which is communicated with the runner port; the flow limiting valve is arranged on the inner side of the discharging channel and is in sliding connection with the discharging channel, and the diameter of the flow limiting valve is larger than that of the flow channel opening. Optionally, the device also comprises a supporting part, wherein the supporting part is arranged on the inner side of the discharging channel; the support member is in contact with the restrictor valve. Optionally, a step surface is arranged on the inner side of the discharging channel towards the flow limiting valve, the supporting part comprises an elastic piece, and the inner diameter of the elastic piece is smaller than the diameter of the flow limiting valve; the elastic piece is arranged on the step surface and between the step surface and the flow limiting valve; One end of the elastic piece is contacted with the end face of the discharging channel far away from the flow passage opening, the diameter of the surrounding area of the step surface on the end face is larger than that of the elastic piece, the diameter is used for limiting the circumferential movement range of the elastic piece, the other end of the elastic piece is contacted with the flow limiting valve, elastic potential energy is stored when the elastic piece is compressed, and when the elastic piece recovers to be long, the elastic potential energy is released to apply supporting force to the flow limiting valve. Optionally, the hot end assembly comprises a first magnetic member, the flow limiting valve comprising a metal; The first magnetic piece is fixedly arranged on the periphery or the surface of the heating component, and the first magnetic piece is positioned on one side of the runner port away from the inlet of the nozzle. Optionally, the discharging channel at least comprises a first part and a second part, wherein the inner diameter of the first part is larger than that of the second part; The first part is connected with the runner port, and the flow limiting valve is connected to the inner side of the first part in a sliding way; the second portion communicates with the outlet of the nozzle. A hot end assembly of a three-dimensional printer, comprising: a heating part, the inner side of which comprises a material flow passage for passing through the consumable, wherein the material flow passage forms a flow passage opening on the heating part; The nozzle is internally provided with a discharging channel, the discharging channel comprises a first part and a second part, and the inner diameter of the first part is larger than that of the second part; the flow limiting valve is connected to the inner side of the first part in a sliding way, and the diameter of the flow limiting valve is larger than the inner diameter of the second part. Optionally, the first portion comprises a tubular discharge channel and the second portion comprises a funnel-shaped discharge channel. Optionally, a groove is formed on the surface of the tubular discharging channel, and the diameter of the flow limiting valve is smaller than the outer diameter of the tubular discharging channel. Optionally, the diameter of the restrictor valve is equal to or greater than the inner diameter of the tubular discharge channel. Optionally, the flow limiting valve comprises metal, and the hot end assembly further comprises: and the second magnetic piece is arranged around or on the surface of the nozzle corresponding to the flow limiting valve, and the second magnetic piece is connected with the nozzle in a sliding way along the length direction of the heating component. Optionally, the flow limitin