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CN-122008545-A - Granule material type 3D printer discharge port double-gear accurate control assembly and design method thereof

CN122008545ACN 122008545 ACN122008545 ACN 122008545ACN-122008545-A

Abstract

The invention provides a granular material type 3D printer discharge port double-gear accurate control component and a design method thereof, which belong to the technical field of 3D printers, the invention adopts a double-gear flow control component with a driving gear meshed with a driven gear to be arranged at a 3D printer discharge port, utilizes the reverse rotation of the gears to convey liquid and forms a sealing barrier when the gears stop rotating, the cooperation screw rod direction heating shell melts the processing to granular material, provides pressure buffering through the liquid storage area, and through the area of transition guide surface guide liquid entering gear meshing, finally by the accurate discharge of discharging pipe, solved 3D printer discharge gate flow control precision not enough and can't realize the technical problem that instantaneous seal blocked.

Inventors

  • LIU SHOUXIN
  • TONG HUI
  • LI YANG

Assignees

  • 青岛瀚海常青科技有限公司

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. The utility model provides a granule material type 3D printer discharge gate double-gear accurate control subassembly, which comprises a housin, the pushing equipment and accuse flow subassembly, the casing is located pushing equipment and accuse flow subassembly's outside, pushing equipment's top is connected with 3D printer's driving system, accuse flow subassembly sets up in pushing equipment's bottom, a serial communication port, accuse flow subassembly includes driving gear and driven gear, driving gear and driven gear meshing setting, driving gear's central point puts and rotary rod fixed connection, driven gear's central point puts and bracing piece fixed connection, make the liquid seal that pushing equipment carried through driving gear and driven gear's meshing in pushing equipment and accuse flow subassembly the rotation drive liquid through rotary rod and bracing piece and carry accuse flow subassembly's below, driving gear and driven gear stop rotatory when the meshing position of driving gear and driven gear form the physical barrier of complete seal and stop the natural flow of liquid under the action of gravity.
  2. 2. The granular material type 3D printer discharge port double-gear precise control assembly according to claim 1, wherein the shell comprises a screw guiding heating shell and a liquid sealing shell, the screw guiding heating shell is sleeved outside the pushing assembly, and the liquid sealing shell is arranged at the bottom of the shell and covers the middle position of the pushing assembly and the flow control assembly.
  3. 3. The granular material type 3D printer discharge port double-gear precise control assembly according to claim 2, wherein the screw guide heating shell is of a cylindrical structure, and a spiral heating channel is formed between the inner wall surface of the screw guide heating shell and the outer spiral surface of the pushing assembly.
  4. 4. The granular material type 3D printer discharge port double-gear precise control assembly according to claim 3, wherein the screw guide heating shell is made of an aluminum alloy material, a plurality of longitudinal heat dissipation ribs are arranged on the outer wall surface of the screw guide heating shell, and the heat dissipation ribs are uniformly distributed along the axial direction of the screw guide heating shell.
  5. 5. The particulate material type 3D printer discharge port double-gear precise control assembly of claim 4, wherein the liquid seal housing has a flat cylindrical cavity structure, and the diameter of the inner cavity of the liquid seal housing is matched with the sum of the diameters of the tooth top circles of the driving gear and the driven gear.
  6. 6. The granular material type 3D printer discharge port double-gear precise control assembly according to claim 5, wherein a liquid storage area is arranged between the pushing assembly and the flow control assembly, and the liquid storage area is of an annular cavity structure.
  7. 7. The granular material type 3D printer discharge port double-gear accurate control assembly according to claim 6, wherein a discharge pipe is arranged at the bottom of the liquid sealing shell, the discharge pipe is in through connection with the liquid sealing shell, and the discharge pipe is in a cone frustum structure.
  8. 8. The precise control assembly for the discharge port double gears of the granular material type 3D printer according to claim 7, wherein the number of teeth of the driving gear is 12-18, and the diameter of the addendum circle of the driven gear is equal to the diameter of the addendum circle of the driving gear.
  9. 9. The design method of the granule material type 3D printer discharge port double-gear accurate control assembly is characterized by being used for designing the granule material type 3D printer discharge port double-gear accurate control assembly according to any one of claims 1 to 8, determining basic parameters of a driving gear and a driven gear according to material conveying flow requirements of a 3D printer, collecting liquid conveying flow data of a plurality of groups of double-gear assemblies at different rotating speeds, establishing a related data set of gear parameters and conveying volumes, designing the volume of a liquid storage area by taking single meshing conveying volume as a reference, determining an optimal value range of a ratio coefficient, establishing an upper game model with optimal sealing performance as a target and a lower game model with maximum conveying efficiency as a target, associating by taking a gear meshing contact area as a coupling item, calculating optimal meshing gaps and optimal meshing depths by adopting the upper game model, calculating optimal tooth widths by adopting the lower game model, and determining the coefficient value range in tooth width calculation.
  10. 10. The method of claim 9, wherein the associated data set is created by pairing the tooth slot depth, tooth width, root radius, tip radius and corresponding single mesh delivery volume measured under different gear parameter combinations to form a multi-dimensional data table comprising gear geometry parameters and delivery performance parameters.

Description

Granule material type 3D printer discharge port double-gear accurate control assembly and design method thereof Technical Field The invention belongs to the technical field of 3D printers, and particularly relates to a granular material type 3D printer discharge port double-gear accurate control assembly and a design method thereof. Background In the 3D printing technology of the granular material type, a conventional discharge control system mainly adopts a single screw extrusion or single gear pumping mode to convey the molten material to a printing nozzle. The single screw extrusion system controls the discharge flow by adjusting the rotation speed of the screw, but because a fixed gap exists between the screw and the shell, molten materials can continuously flow out from the discharge port under the action of gravity, and accurate flow regulation and instantaneous cutoff cannot be realized. While single gear pumping systems can provide stable delivery pressures, the single-sided seal between the gear and the housing is difficult to form an effective physical barrier, resulting in slow leakage of material under its own weight at shut-down. In the current granular material 3D printing application, as a discharging system cannot form a complete sealing state when a gear stops rotating, material dripping and wiredrawing phenomena frequently occur in the printing process, and the surface quality and the dimensional accuracy of a printed piece are seriously affected. That is, in the prior art, there is a technical problem that the flow control precision of the discharge port of the 3D printer is insufficient and instantaneous seal blocking cannot be realized. Disclosure of Invention In view of the above, the invention provides a granular material type 3D printer discharge port double-gear accurate control assembly and a design method thereof, which can solve the technical problems that in the prior art, the flow control precision of the 3D printer discharge port is insufficient and instantaneous sealing blocking cannot be realized. The invention provides a granular material type 3D printer discharge port double-gear accurate control assembly and a design method thereof, wherein the flow control assembly comprises a driving gear and a driven gear, the driving gear is meshed with the driven gear, the central position of the driving gear is fixedly connected with a rotary rod, the central position of the driven gear is fixedly connected with a supporting rod, liquid conveyed by a pushing assembly is sealed at a position between the pushing assembly and the flow control assembly through the meshing of the driving gear and the driven gear, the liquid is driven to be conveyed to the lower part of the flow control assembly through the rotation of the rotary rod and the supporting rod, and when the driving gear and the driven gear stop rotating, the meshing position of the driving gear and the driven gear forms a completely sealed physical barrier to block the natural flow of the liquid under the action of gravity. The shell comprises a screw rod guiding heating shell and a liquid sealing shell, the screw rod guiding heating shell is sleeved outside the pushing component, and the liquid sealing shell is arranged at the bottom of the shell and covers the middle position of the pushing component and the flow control component. The screw rod guiding heating shell is of a cylindrical structure, and a spiral heating channel is formed between the inner wall surface of the screw rod guiding heating shell and the outer spiral surface of the pushing component. The screw guide heating shell is made of an aluminum alloy material, a plurality of longitudinal radiating ribs are arranged on the outer wall surface of the screw guide heating shell, and the radiating ribs are uniformly distributed along the axial direction of the screw guide heating shell. The liquid sealing shell is of a flat cylindrical cavity structure, and the diameter of an inner cavity of the liquid sealing shell is matched with the sum of the diameters of tooth top circles of the driving gear and the driven gear. Wherein, be provided with the liquid storage district between pushing away material subassembly and the accuse flow subassembly, the liquid storage district is annular cavity structure. The bottom of the liquid sealing shell is provided with a discharging pipe, the discharging pipe is connected with the liquid sealing shell in a penetrating way, and the discharging pipe is of a cone frustum structure. The number of teeth of the driving gear is 12-18, and the diameter of the addendum circle of the driven gear is equal to that of the driving gear. The precise control assembly for the discharge port double gears of the granular material type 3D printer is used for designing the precise control assembly for the discharge port double gears of the granular material type 3D printer according to the material conveying flow requirement of the 3D printer, deter