CN112519205B

CN112519205B - Quick 3D prints shower nozzle

Info

Publication number: CN112519205B
Application number: CN202010971785.2A
Authority: CN
Inventors: 廖力达; 凌宇亮; 黄斌
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2022-06-10
Anticipated expiration: 2040-09-16
Also published as: CN112519205A

Abstract

The application provides a quick 3D prints shower nozzle, including feed inlet, grinder, auger delivery ware, separator, outer hole, casing, go up filter screen, nozzle down. The feeding material is crushed into tiny particles by the crusher, the material is pushed to the front end by the screw conveyor and is respectively guided into the outer hole and the inner hole by the separator, the material falling into the outer hole is heated to be in a liquid state, the material in the inner hole absorbs less heat and keeps a solid state to reach the upper part of the nozzle through the upper filter screen, the solid state is wrapped by the liquid material flowing in from the lower filter screen, and the liquid material flows out from the nozzle under the extrusion operation of the screw conveyor. The application provides a pair of quick 3D prints shower nozzle only needs heating some to print the material, and the cooling after corresponding shaping is also faster, has improved the liquefaction ejection of compact speed and the shaping cooling solidification rate of material greatly.

Description

Quick 3D prints shower nozzle

Technical Field

The invention relates to the field of 3D printing, and provides a rapid 3D printing nozzle which can be used for separating fed materials and heating partial fed materials to improve the 3D printing speed.

Background

At present, the slow printing speed is a serious trouble of Fused Deposition Modeling (FDM)3D printers, and meanwhile, the heat dissipation effect is not ideal. The problem that the printing speed is improved and the heating value is reduced cannot be solved by an existing 3D printing spray head.

The invention aims to provide a rapid 3D printing nozzle which can improve the 3D printing speed and improve the overheating phenomenon of the nozzle. The invention has simple structure, can replace the spray head used by the prior FDM3D printer, has high discharging speed and small heat productivity, and can solidify more quickly.

Disclosure of Invention

The invention provides a rapid 3D printing nozzle, wherein a printing material enters the nozzle from a feed inlet and is crushed into tiny particles by a crusher, the material is pushed to the front end by a screw conveyor and is respectively guided into an outer hole and an inner hole by a separator, the material falling into the outer hole is heated to be in a liquid state, the material in the inner hole absorbs less heat, the solid state is kept to reach the upper part of a nozzle through an upper filter screen and is wrapped by a liquid material flowing in from a lower filter screen, and the liquid material flows out from the nozzle under the extrusion operation of the screw conveyor. Only need heat some printing materials, reduced heating time, make printing materials can flow out fast after the short-term dwell in the shower nozzle, improved the liquefaction ejection of compact speed of material greatly, the cooling solidification after corresponding shaping is also faster simultaneously.

The technical scheme adopted by the invention for solving the technical problems is as follows: comprises a feed inlet, a crusher, a spiral conveyor, a separator, an outer hole, an inner hole, a shell, an upper filter screen, a lower filter screen and a nozzle; the upper part of the pulverizer is connected with the feed inlet and is connected with a screw conveyor in a lower mode; the upper part of the separator is a step-shaped inclined section, the high side of the separator is a closed inclined plane, and the low side of the separator is communicated with the inner hole; the outer hole surrounds the separator, and the bottom of the outer hole is provided with a lower filter screen which is distributed in a tubular shape; the inner hole is positioned in the separator, and the bottom end of the inner hole is provided with an upper filter screen; the upper filter screen is positioned at the upper part of the lower filter screen; the lower filter screen is positioned at the upper part of the nozzle.

The printing material crushed by the crusher is pushed by the screw conveyor to flow downward. One part of the water drops on the high side of the separator and slides into the outer hole along the inclined plane on the high side; the other part falls on the lower side of the separator and slides into the inner hole along the inclined plane on the lower side. The periphery of the outer hole is a shell of the whole spray head, and a heater is arranged below the shell. The material falling into the outer hole is heated to be liquid by the heater; and the material falling into the inner hole is far away from the heater, and the material hardly absorbs heat and keeps a solid state. The material falling into the inner bore reaches the upper part of the nozzle through the upper filter screen in solid form and falls from the upper filter screen. The material in the heated outer holes flows out of the lower filter screen in a liquid state, and when the solid material falls from the upper filter screen, the solid material is wrapped, and the flowing characteristic of the whole body is still kept. The mixed printing material has liquid outer layer and solid inner layer, and flows out from the nozzle under the action of the thrust and self weight of the screw conveyer.

The invention has the beneficial effects that: adding a crusher to crush the feed material, and enabling the crushed feed material to enter the outer hole and the inner hole respectively through a separator; only the material in the outer hole needs to be heated into liquid state, so that the retention time of the material in the spray head is reduced, and the discharging speed is accelerated; meanwhile, the middle of the printed mixed material is solid, and only the outer layer of liquid material needs to be cooled and solidified, so that the forming speed is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic external view of the present invention;

FIG. 2 is a schematic view of an overall sectional structure;

FIG. 3 is a schematic view of the screw conveyor;

figure 4 is a schematic diagram of a separator.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 4, the rapid 3D printing nozzle comprises a feed port (1), a pulverizer (2), a screw conveyor (3), a separator (4), an outer hole (5), an inner hole (6), a shell (7), an upper filter screen (8), a lower filter screen (9) and a nozzle (10); the upper part of the pulverizer (2) is connected with the feed inlet (1) and is connected with a screw conveyor (3) in a lower way; the upper part of the separator (4) is a step-shaped inclined section, the high side is a closed inclined plane, and the low side is communicated with the inner hole (6); the outer hole (5) surrounds the separator (4), the bottom of the outer hole is provided with a lower filter screen (9) which is distributed in a tubular shape, and the periphery of the outer hole (5) is provided with a shell (7); the inner hole (6) is positioned inside the separator (4), and the bottom end of the inner hole is provided with an upper filter screen (8); the upper filter screen (8) is positioned at the upper part of the lower filter screen (9); the lower filter screen (9) is positioned at the upper part of the nozzle (10); the lower part of the shell (7) is provided with a heater (11).

The working principle of the device is as follows:

the printing material enters the spray head from the feed port (1), and is crushed by the crusher (2) below the feed port (1). The printing material crushed by the crusher is pushed by the screw conveyor (3) to flow downwards. One part of the water drops on the high side of the separator (4) and slides into the outer hole (5) along the inclined plane of the high side; the other part falls on the lower side of the separator (4) and slides into the inner hole (6) along the inclined plane of the lower side. The periphery of the outer hole (5) is a shell (7) of the whole spray head, and a heater (11) is arranged below the shell (7). The material falling into the outer hole (5) is heated to be in a liquid state by the heater (4); and the material falling into the inner hole (6) is far away from the heater, and the material absorbs little heat and keeps a solid state. The material falling into the inner bore (6) reaches the upper part of the nozzle (10) through the upper filter screen (8) in a solid state and falls from the upper filter screen (8). The material in the heated outer holes (5) flows out of the lower filter screen (9) in a liquid state, and meets the solid material falling from the upper filter screen (8) to form a package, so that the flowing characteristic of the whole body is still maintained. The outer layer of the mixed printing material is liquid, the inner layer of the mixed printing material is solid, and the mixed printing material flows out from the nozzle (10) under the action of the thrust and the self-weight of the screw conveyor (3); the flowing material is formed into a required shape along with the movement of the spray head, and is solidified and formed after being cooled.

The above embodiments are only for illustrating the technical solution of the present invention and are not limited thereto, and any modifications or equivalent substitutions which do not depart from the spirit and scope of the present invention should be covered within the technical solution of the present invention.

Claims

1. The utility model provides a quick 3D prints shower nozzle which characterized in that: comprises a feed inlet (1), a pulverizer (2), a spiral conveyor (3), a separator (4), an outer hole (5), an inner hole (6), a shell (7), an upper filter screen (8), a lower filter screen (9) and a nozzle (10); the upper part of the pulverizer (2) is connected with the feed inlet (1) and is connected with a screw conveyor (3) in a lower connection mode; the upper part of the separator (4) is a step-shaped inclined section, the high side of the separator is a closed inclined plane, and the low side of the separator is communicated with the inner hole (6); the outer hole (5) surrounds the separator (4), and the bottom of the outer hole is provided with a lower filter screen (9) which is distributed in a tubular shape; the inner hole (6) is positioned inside the separator (4), and the bottom end of the inner hole is provided with an upper filter screen (8); the upper filter screen (8) is positioned at the upper part of the lower filter screen (9); the lower filter screen (9) is positioned at the upper part of the nozzle (10).