CN111169008B

CN111169008B - 3D printing nozzle

Info

Publication number: CN111169008B
Application number: CN202010140147.6A
Authority: CN
Inventors: 王海军; 王涛; 田�健; 曹林; 苏唐芹
Original assignee: Tianjin Bosheng Rui Chong Technology Co ltd
Current assignee: TIANJIN BOSHENG RUI CHONG TECHNOLOGY CO.,LTD.
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2022-02-18
Anticipated expiration: 2040-03-03
Also published as: CN111169008A

Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printing spray head which comprises a feed hopper, a curing pipe and a bullet-shaped discharge pipe, wherein the top of the feed hopper is communicated with a material injection pipe; the bottom of the feed hopper is communicated with the top end of the curing tube; an annular mounting groove is formed in the inner wall of the curing tube; the inner wall of the annular mounting groove is fixedly connected with a transparent glass tube; nano scattering ions are injected into the transparent glass tube; according to the invention, the ultraviolet light emitted by the laser head is scattered under the synchronous action of the scattering tube and the transparent glass tube, the inner side and the outer side of the light curing material can be synchronously irradiated, so that the curing is more uniform, and the interior of the transparent glass tube is scraped through the mutual matching of the linkage ring and the scraping ring, so that the light curing material is prevented from being adhered to the inner wall of the transparent glass tube, and the blockage is avoided.

Description

3D printing nozzle

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printing nozzle.

Background

The photocuring printing technology is that a three-dimensional solid model is designed through CAD, the model is sliced by using a discrete program, a scanning path of laser is designed, and the motion of a laser scanner and a lifting platform is accurately controlled by using generated data. And then irradiating the surface of the light-cured material by using laser with specific wavelength and intensity according to a designed scanning path, solidifying the light-cured material from point to line and from line to surface sequentially, so that one layer of resin in a specific area of the surface is cured, then descending the lifting platform by the height of one layer of the resin in the vertical direction, covering another layer of liquid resin on the cured layer, then scanning a second layer, curing another layer of the resin, and firmly bonding the second cured layer on the previous cured layer, thus forming a three-dimensional entity by stacking the layers.

Some technical schemes for 3D printing nozzles also appear in the prior art, for example, a chinese patent with application number 201710083137.1 discloses a 3D printing nozzle, which includes a nozzle body with an inner cavity, an opaque injection head and a transparent injection head coaxially arranged are fixed at the bottom of the nozzle body, and the transparent injection head is fixed at the bottom of the opaque injection head; the inner cavity of the nozzle body is communicated with the inner cavities of the light-tight injection head and the light-permeable injection head.

In the prior art, the 3D printing nozzle cures the light curing material by irradiating ultraviolet rays, but in the process of injecting the curing material by the 3D printing nozzle, the inner wall of the curing section in the 3D printing nozzle can cure the adjacent light-cured material more thoroughly, but the curing of the inner side of the light-cured material can not be synchronous, the ultraviolet light can not be irradiated on the light-cured material uniformly, the flow capacity of the inner side of the light-cured material is larger than that of the outer side, the quality of a printed model is influenced, and the photocuring material is in the solidification process on 3D printing shower nozzle inner wall, and the intensity of solidification is the same, causes easily that the photocuring material just obtains stronger solidification when not annotating the shower nozzle, influences the circulation of photocuring material, and the material produces the adhesion with printing the shower nozzle inner wall easily at the in-process through printing the shower nozzle inner wall, and then causes the jam of printing the shower nozzle easily.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that in the prior art, a 3D printing nozzle is not uniform in curing of a photo-curing material, the photo-curing material is easy to adhere to the inner wall of the 3D printing nozzle, and the printing nozzle is easy to block.

The technical scheme adopted by the invention for solving the technical problems is as follows: the 3D printing nozzle comprises a feed hopper, a curing pipe and a bullet-shaped discharge pipe, wherein the top of the feed hopper is communicated with a material injection pipe; the bottom of the feed hopper is communicated with the top end of the curing tube; an annular mounting groove is formed in the inner wall of the curing tube; the inner wall of the annular mounting groove is fixedly connected with a transparent glass tube; nano scattering ions are injected into the transparent glass tube; one side of the inner wall of the annular mounting groove, which is far away from the transparent glass tube, is fixedly connected with laser heads which are linearly arranged; the top end and the bottom end of the inner wall of the annular mounting groove are fixedly connected with reflectors; the positions of the top end and the bottom end on the inner wall of the curing tube, which correspond to the reflector, are fixedly connected with light conveying pipes; the end part of the light conveying pipe is communicated to the inside of the annular mounting groove and is opposite to the reflecting surface of the reflector; a scattering tube is fixedly communicated between the two light conveying tubes; the scattering tube is positioned at the middle position inside the curing tube; nanometer reflective particles are arranged inside the scattering tube; the bottom of the curing tube is fixedly communicated with a bullet-shaped discharge tube; when the ultraviolet curing device works, a light curing material is injected into the feeding hopper through the material injection pipe, the light curing material enters the curing pipe through the drainage of the feeding hopper, the laser head provides an ultraviolet light source, under the scattering action of nano scattering particles in the transparent glass pipe, ultraviolet light irradiates and cures the outer side of the light curing material passing through the curing pipe, under the action of the reflectors at the top end and the bottom end of the inner wall of the annular mounting groove, the ultraviolet light is reflected into the light conveying pipe, under the conveying action of the light conveying pipe, the ultraviolet light is conveyed into the scattering pipe, and is scattered under the action of the nano scattering particles in the scattering pipe, so that the inner side of the passing light curing material is scattered, the area of the ultraviolet light synchronously received by the light curing material is increased, and the light curing levels of the inner side and the outer side of the light curing material are basically consistent, and then make the interior outside flow condition of photocuring material unanimous to shine more evenly to photocuring material.

Preferably, the transparent glass tube is formed by fixedly connecting a plurality of glass tubes; the diameters of the nanometer scattering ions in the glass tubes of different sections in the transparent glass tube are different; the diameters of the nanometer scattering ions in the transparent glass tube are sequentially reduced from bottom to top; during operation, because the diameter of the nanometer scattering ion of transparent glass pipe reduces from supreme down in proper order, consequently transparent glass pipe also reduces from last to down gradually to the scattering ability of ultraviolet ray light, consequently makes the curing tube strengthen gradually to the curing ability of the inside photocuring material that passes through, avoids having been avoided by the problem of excessive solidification before the photocuring material is not through the curing tube, avoids influencing the circulation of photocuring material at the curing tube.

Preferably, the inner diameter of the upper section of the bullet-shaped discharge pipe is larger than that of the curing pipe; when the device works, the inner diameter of the upper section of the bullet-shaped discharge pipe is larger than that of the curing pipe, so that the circulation space is increased, and the circulation of the cured light-cured material is facilitated.

Preferably, the inner wall of the bullet-shaped discharge pipe is connected with a linkage ring in a sliding manner; the linkage ring is formed by alternately and fixedly connecting a fixed block and a rubber block; the outer side surface of the fixed block is fixedly connected with a connecting slide block; the inner wall of the bullet-shaped discharge pipe is provided with a sliding groove at a position corresponding to the connecting sliding block; the connecting sliding block is connected to the inner wall of the sliding groove in a sliding manner; the top of the linkage ring is connected with a scraping ring through a connecting rope; the scraping ring is connected to the inner wall of the transparent glass tube in a sliding manner; the scraping ring is positioned between the two light conveying pipes; both sides of the top of the scraping ring are fixedly connected with return springs; the top end of the return spring is fixedly connected with a connecting block; the side surface of the connecting block is fixedly connected to the inner wall of the curing tube; when the device works, the linkage ring is formed by fixedly connecting the fixed block and the rubber block alternately, so the linkage ring has elastic expansion capacity, the linkage ring is connected on the inner wall of the chute in a sliding way through the surface of the connecting sliding block, the effect of connecting the linkage ring on the inner wall of the bullet-shaped discharge pipe in a sliding way is achieved, the light-cured material can flow into the bullet-shaped discharge pipe after passing through the curing pipe, the light-cured material can generate pressure on the top of the linkage ring through the linkage ring to drive the linkage ring to move downwards, the linkage ring synchronously drives the scraping ring to move downwards through the connecting rope, so that the light-cured material to be adhered on the inner wall of the transparent glass pipe is scraped, the adhesion of the light-cured material on the inner wall of the transparent glass pipe is avoided, the scraping ring can stretch the reset spring while moving downwards, the reset spring can generate certain reset elastic force, when the pulling force of the scraping ring by the connecting rope is smaller than the upward reset force of the reset spring, the scraping ring can move upwards under the action of the reset force, and under the mutual matching of the scraping ring and the linkage ring, the effect of avoiding the adhesion of the light-cured material on the inner wall of the transparent glass tube is achieved, so that the circulation of the light-cured material in the curing tube is smoother, and the blockage of the printing nozzle is avoided.

Preferably, the top and the bottom of the scraping ring are both fixedly connected with annular blades; the inner side of the annular blade is provided with an arc-shaped surface; during operation, the scraping rings can synchronously drive the annular blade to scrape on the inner wall of the transparent glass tube, and under the action of the arc-shaped surface, the scraped photocuring material can be pushed inwards, so that the scraping rings are prevented from causing large resistance.

Preferably, the inner diameter of the lower section of the bullet-shaped discharge pipe is larger than the inner diameter of the upper section of the bullet-shaped discharge pipe; the during operation, the link ring is under photocuring material's drive, the hypomere in-process of bullet form discharging pipe is removed to from the upper segment inside of bullet form discharging pipe, the link ring can be at the increase of internal diameter under the pulling of link block, thereby make photocuring material pass through the link ring fast, reduce the effort to the link ring, so that reset spring's restoring force is greater than photocuring material and to the decurrent effort of link ring, make link ring and scraping ring reset, make the scraping ring can upwards scrape, the reciprocal scraping from top to bottom of realization to the clear glass intraductal wall, avoid causing the jam to the clear glass pipe, help photocuring material circulation in the curing pipe.

Preferably, a compression spring is fixedly connected between the inner sides of the two opposite fixed blocks; the compression springs are mutually staggered; the during operation, through setting up compression spring, make the light-cured material obtain compression spring's hindrance before through the link ring, the effort of light-cured material to the link ring has been increased, make the link ring can the longer distance of downstream, so that the link ring drives the sufficient distance of scraper ring downstream through connecting the rope, scrape in order to satisfy whole inner wall to the clear glass pipe, after compression spring is certain distance by accumulational light-cured material downwardly stretching, can produce great space between the compression spring, light-cured material can pass through open space fast, avoid causing the jam.

The invention has the following beneficial effects:

1. the invention relates to a 3D printing nozzle, which is characterized in that a feed hopper, a material injection pipe, a curing pipe, an annular mounting groove, a transparent glass pipe, a laser head, a reflector, a light conveying pipe and a scattering pipe are arranged, a light curing material is injected into the feed hopper through the material injection pipe, the light curing material enters the curing pipe through the drainage of the feed hopper, the laser head provides an ultraviolet light source, the ultraviolet light is irradiated and cured on the outer side of the light curing material passing through the curing pipe under the scattering action of nano scattering particles in the transparent glass pipe, the ultraviolet light is reflected into the light conveying pipe under the action of the reflectors at the top end and the bottom end of the inner wall of the annular mounting groove, the ultraviolet light is conveyed into the scattering pipe under the conveying action of the light conveying pipe, the ultraviolet light is scattered under the action of the nano scattering particles in the scattering pipe, and the inner side of the light curing material is synchronously scattered, therefore, the area of ultraviolet light synchronously received by the light-cured material is increased, the light-cured material is irradiated more uniformly, and the problem that the light-cured material cannot be irradiated uniformly by ultraviolet light in the process of injecting the cured material by the 3D printing nozzle is solved.

2. According to the 3D printing nozzle, the transparent glass tube is made of the plurality of sections of glass tubes, the diameters of nanometer scattering ions of the transparent glass tube are sequentially reduced from bottom to top, so that the scattering capacity of the transparent glass tube on ultraviolet light is gradually reduced from top to bottom, the curing capacity of the curing tube on internally-passing light curing materials is gradually enhanced from top to bottom, the problem that the light curing materials are over-cured before passing through the curing tube is solved, and the circulation of the light curing materials in the curing tube is prevented from being influenced.

3. The invention relates to a 3D printing nozzle, which is characterized in that a linkage ring, a fixed block, a rubber block, a connecting slide block, a chute, a connecting rope, a scraping ring, a reset spring, a connecting block and an annular blade are arranged, light-cured materials can flow into a bullet-shaped discharge pipe after passing through a curing pipe, the light-cured materials can generate pressure on the top of the linkage ring through the linkage ring to drive the linkage ring to move downwards, the linkage ring synchronously drives the scraping ring to move downwards through the connecting rope, so that the light-cured materials to be adhered on the inner wall of a transparent glass pipe are scraped, the adhesion of the light-cured materials to the inner wall of the transparent glass pipe is avoided, the linkage ring is driven by the light-cured materials and moves from the inside of the upper section of the bullet-shaped discharge pipe to the lower section of the bullet-shaped discharge pipe, the inner diameter of the linkage ring is increased under the pulling of the connecting slide block, so that the light-cured materials can rapidly pass through the linkage ring, the acting force on the linkage ring is reduced, so that the resetting force of the resetting spring is greater than the downward acting force of the photocuring material on the linkage ring, the linkage ring and the scraping ring are reset, the scraping ring can be upwards scraped, the up-and-down reciprocating scraping on the inner wall of the transparent glass tube is realized, and the problem that the photocuring material is adhered to the inner wall of the transparent glass tube and is easy to block is solved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is a perspective view of the coupling ring and scraper ring of the present invention;

in the figure: the device comprises a feed hopper 1, a material injection pipe 11, a curing pipe 2, an annular mounting groove 21, a transparent glass pipe 22, a laser head 23, a reflective mirror 24, a light conveying pipe 25, a scattering pipe 26, a bullet-shaped discharge pipe 3, a linkage ring 4, a fixed block 41, a rubber block 42, a connecting slide block 43, a sliding groove 44, a connecting rope 45, a scraping ring 46, a return spring 47, a connecting block 48, an annular blade 5 and a compression spring 6.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the 3D printing nozzle according to the present invention includes a feeding hopper 1, a curing pipe 2 and a bullet discharging pipe 3, wherein the top of the feeding hopper 1 is communicated with a material injection pipe 11; the bottom of the feed hopper 1 is communicated with the top end of the curing tube 2; an annular mounting groove 21 is formed in the inner wall of the curing tube 2; the inner wall of the annular mounting groove 21 is fixedly connected with a transparent glass tube 22; nano reflective particles are injected into the transparent glass tube 22; one side of the inner wall of the annular mounting groove 21, which is far away from the transparent glass tube 22, is fixedly connected with laser heads 23 which are linearly arranged; the top end and the bottom end of the inner wall of the annular mounting groove 21 are fixedly connected with a reflecting mirror 24; the positions of the top end and the bottom end of the inner wall of the curing tube 2, which correspond to the reflector 24, are fixedly connected with a light conveying pipe 25; the end part of the light conveying pipe 25 is communicated to the inside of the annular mounting groove 21 and is opposite to the reflecting surface of the reflector 24; a scattering tube 26 is fixedly communicated between the two light conveying tubes 25; the scattering tube 26 is located at an intermediate position inside the curing tube 2; nano scattering ions are injected into the scattering tube 26; the bottom of the curing tube 2 is fixedly communicated with a bullet-shaped discharge tube 3; when the ultraviolet curing light source device works, a light curing material is injected into the feed hopper 1 through the material injection pipe 11, the light curing material enters the curing pipe 2 through the drainage of the feed hopper 1, the laser head 23 provides an ultraviolet light source, the ultraviolet light performs light curing on the outer side of the light curing material passing through the curing pipe 2 under the scattering effect of nano scattering particles in the transparent glass pipe 22, the ultraviolet light is reflected into the light conveying pipe 25 under the effect of the reflectors 24 at the top end and the bottom end of the inner wall of the annular mounting groove 21, the ultraviolet light is conveyed into the scattering pipe 26 under the conveying effect of the light conveying pipe 25, the ultraviolet light is scattered under the effect of the nano scattering particles in the scattering pipe 26, the inner side of the passing light curing material is scattered, the area of ultraviolet light illumination synchronously received by the light curing material is increased, and the light curing levels on the inner side and the outer side of the light curing material are basically consistent, and then make the interior outside flow condition of photocuring material unanimous, it is more even to the solidification of photocuring material.

As an embodiment of the present invention, the transparent glass tube 22 is formed by fixedly connecting a plurality of glass tubes; the diameters of the nanometer scattering ions in the glass tubes of different sections in the transparent glass tube 22 are different; the diameters of the nanometer scattering ions in the transparent glass tube 22 are sequentially reduced from bottom to top; during operation, because the diameter of the nanometer scattering ion of transparent glass pipe 22 reduces from bottom to top in proper order, consequently transparent glass pipe 22 also reduces from top to bottom gradually to the scattering ability of ultraviolet light, consequently strengthens gradually from top to bottom to the curing ability of the inside photocuring material that passes through of curing tube 2, avoids photocuring material not through curing tube 2 before the problem by the overcuring, avoids influencing the normal circulation of photocuring material in curing tube 2.

In one embodiment of the invention, the inner diameter of the upper section of the bullet-shaped discharge pipe 3 is greater than the inner diameter of the solidification pipe 2; when the device works, the inner diameter of the upper section of the bullet-shaped discharge pipe 3 is larger than that of the curing pipe 2, so that the circulation space is increased, and the circulation of the cured light-cured material is facilitated.

As an embodiment of the invention, a linkage ring 4 is connected to the inner wall of the bullet-shaped discharge pipe 3 in a sliding manner; the linkage ring 4 is formed by alternately and fixedly connecting a fixed block 41 and a rubber block 42; the outer side surface of the fixed block 41 is fixedly connected with a connecting slide block 43; a sliding groove 44 is formed in the inner wall of the bullet-shaped discharge pipe 3 at a position corresponding to the connecting slide block 43; the surface of the connecting slide block 43 is connected with the inner wall of the sliding groove 44 in a sliding way; the top of the linkage ring 4 is connected with a scraping ring 46 through a connecting rope 45; the scraping ring 46 is connected to the inner wall of the transparent glass tube 22 in a sliding manner; the scraper ring 46 is positioned between the two light conveying pipes 25; two sides of the top of the scraping ring 46 are fixedly connected with a return spring 47; the top end of the return spring 47 is fixedly connected with a connecting block 48; the side surface of the connecting block 48 is fixedly connected to the inner wall of the curing tube 2; when the device works, the linkage ring 4 is formed by fixedly connecting the fixed block 41 and the rubber block 42 alternately, the linkage ring 4 has elastic expansion capacity, is connected to the inner wall of the chute 44 in a sliding manner through the connecting slide block 43, plays a role of connecting the linkage ring 4 to the inner wall of the bullet-shaped discharge pipe 3 in a sliding manner, the light-cured material passes through the curing pipe 2 and then flows into the bullet-shaped discharge pipe 3, the light-cured material passes through the linkage ring 4 to generate pressure on the top of the linkage ring 4 to drive the linkage ring 4 to move downwards, the linkage ring 4 synchronously drives the scraping ring 46 to move downwards through the connecting rope 45, so that the light-cured material to be adhered to the inner wall of the transparent glass pipe 22 is scraped, the adhesion of the light-cured material to the inner wall of the transparent glass pipe 22 is avoided, the resetting spring 47 is stretched while the scraping ring 46 moves downwards, and the resetting spring 47 generates certain resetting elastic force, when the scraping ring 46 is pulled by the connecting rope 45 and is smaller than the upward resetting force of the resetting spring 47, the scraping ring 46 can move upwards under the action of the resetting force, and the scraping ring 46 and the linkage ring 4 are mutually matched, so that the effect of preventing the photo-curing material from being adhered to the inner wall of the transparent glass tube 22 is achieved, and the blockage of the printing spray head is avoided.

As an embodiment of the present invention, the top and the bottom of the scraping ring 46 are fixedly connected with the annular blade 5; the inner side of the annular blade 5 is provided with an arc-shaped surface; during operation, the scraping ring 46 can synchronously drive the annular blade 5 to scrape on the inner wall of the transparent glass tube 22, and under the action of the arc-shaped surface, the scraped photocuring material can be pushed inwards, so that the scraping ring 46 is prevented from causing large resistance, and the scraping ring 46 can scrape on the inner wall of the transparent glass tube 22 more smoothly.

In one embodiment of the invention, the lower internal diameter of the bullet-shaped discharge pipe 3 is greater than the internal diameter of the upper section of the bullet-shaped discharge pipe 3; during operation, link ring 4 is under the drive of photocuring material, the lower segment in-process that moves to bullet form discharging pipe 3 from the upper segment inside of bullet form discharging pipe 3, link ring 4 can be under the pulling effect of link block 43 internal diameter increase gradually, thereby make the photocuring material pass through link ring 4 fast, reduce photocuring material to link ring 4's effort, so that reset spring 47's restoring force is greater than photocuring material and to link ring 4 decurrent effort, make link ring 4 and scraping ring 46 reset, make scraping ring 46 can upwards scrape, the reciprocal scraping from top to bottom of realization to transparent glass pipe 22 inner wall, avoid causing the problem of transparent glass pipe 22 jam because photocuring material adhesion is on 3D beats printer head inner wall, make the inside circulation of photocuring material at transparent glass pipe 22 more smooth and easy.

As an embodiment of the present invention, a compression spring 6 is fixedly connected between the inner sides of the two opposite fixing blocks 41; the compression springs 6 are mutually staggered; the during operation, through setting up compression spring 6, make the light-cured material obtain compression spring 6's hindrance before through link 4, the effort of light-cured material to link 4 has been increased, make link 4 can move longer distance downwards, so that link 4 drives scraper 46 through connecting rope 45 and moves enough distance downwards, scrape to satisfying the whole inner wall of clear glass tube 22, after compression spring 6 is stretched certain distance downwards by accumulational light-cured material, can produce great space between compression spring 6, light-cured material can pass through open space fast, avoid causing the jam.

The specific working process is as follows:

during operation, inject the inside of feeder hopper 1 into through annotating material pipe 11 with photocuring material, photocuring material gets into in the curing tube 2 under the drainage of feeder hopper 1, laser head 23 provides ultraviolet light source, under the scattering effect of ultraviolet light nanometer scattering particle in transparent glass tube 22, make ultraviolet light carry out the photocuring to the photocuring material outside through in the curing tube 2, under the effect of reflector 24 at annular mounting groove 21 inner wall top and bottom, reflect the ultraviolet light to in the light conveyer pipe 25, under the transport of light conveyer pipe 25, ultraviolet light is carried to in the scattering tube 26, scatter ultraviolet light under the effect of the nanometer scattering particle in the scattering tube 26, reach and carry out the scattering to the inboard of the photocuring material that passes through. Because the diameters of the nanometer scattering ions of the transparent glass tube 22 are sequentially reduced from bottom to top, the scattering capacity of the transparent glass tube 22 on ultraviolet light is gradually reduced from top to bottom, so that the curing capacity of the curing tube 2 on internally-passing light-cured materials is gradually enhanced from top to bottom, the problem that the light-cured materials are over-cured before passing through the curing tube 2 is avoided, and the circulation of the light-cured materials in the curing tube 2 is prevented from being influenced; the photocuring material can flow into the bullet-shaped discharge pipe 3 after passing through the curing pipe 2, the photocuring material can generate pressure on the top of the linkage ring 4 through the linkage ring 4 to drive the linkage ring 4 to move downwards, the linkage ring 4 synchronously drives the scraping ring 46 to move downwards through the connecting rope 45, so that the photocuring material to be adhered on the inner wall of the transparent glass pipe 22 is scraped, the adhesion of the photocuring material on the inner wall of the transparent glass pipe 22 is avoided, the linkage ring 4 is driven by the photocuring material to move from the upper section of the bullet-shaped discharge pipe 3 to the lower section of the bullet-shaped discharge pipe 3, the inner diameter of the linkage ring 4 is increased under the pulling of the connecting slide block 43, so that the photocuring material quickly passes through the linkage ring 4, the acting force on the linkage ring 4 is reduced, and the reset force of the reset spring 47 is greater than the downward acting force of the photocuring material on the linkage ring 4, the linkage ring 4 and the scraping ring 46 are reset, so that the scraping ring 46 can scrape upwards, and the up-and-down reciprocating scraping of the inner wall of the transparent glass tube 22 is realized.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a 3D prints shower nozzle, includes feeder hopper (1), curing tube (2) and bullet head form discharging pipe (3), its characterized in that: the top of the feed hopper (1) is communicated with a material injection pipe (11); the bottom of the feed hopper (1) is communicated with the top end of the curing tube (2); an annular mounting groove (21) is formed in the inner wall of the curing tube (2); the inner wall of the annular mounting groove (21) is fixedly connected with a transparent glass tube (22); nano scattering ions are injected into the transparent glass tube (22); one side of the inner wall of the annular mounting groove (21), which is far away from the transparent glass tube (22), is fixedly connected with laser heads (23) which are arranged linearly; the top end and the bottom end of the inner wall of the annular mounting groove (21) are fixedly connected with reflectors (24); the top end and the bottom end of the inner wall of the curing tube (2) are fixedly connected with a light conveying pipe (25) at positions corresponding to the reflector (24); the end part of the light conveying pipe (25) is communicated with the inside of the annular mounting groove (21) and is opposite to the reflecting surface of the reflector (24); a scattering tube (26) is fixedly communicated between the two light conveying tubes (25); the scattering tube (26) is positioned at the middle position inside the curing tube (2); nano reflective particles are arranged inside the scattering tube (26); the bottom of the curing pipe (2) is fixedly communicated with a bullet-shaped discharge pipe (3);

the inner wall of the bullet-shaped discharge pipe (3) is connected with a linkage ring (4) in a sliding way; the linkage ring (4) is formed by alternately and fixedly connecting a fixed block (41) and a rubber block (42); the outer side surface of the fixed block (41) is fixedly connected with a connecting slide block (43); a sliding groove (44) is formed in the inner wall of the bullet-shaped discharge pipe (3) at a position corresponding to the connecting slide block (43); the connecting sliding block (43) is connected to the inner wall of the sliding groove (44) in a sliding manner; the top of the linkage ring (4) is connected with a scraping ring (46) through a connecting rope (45); the scraping ring (46) is connected to the inner wall of the transparent glass tube (22) in a sliding manner; the scraping ring (46) is positioned between the two light conveying pipes (25); both sides of the top of the scraping ring (46) are fixedly connected with a return spring (47); the top end of the return spring (47) is fixedly connected with a connecting block (48); the side surface of the connecting block (48) is fixedly connected to the inner wall of the curing tube (2).

2. The 3D printing head according to claim 1, wherein: the transparent glass tube (22) is formed by fixedly connecting a plurality of glass tubes; the diameters of the nanometer scattering ions in the glass tubes of different sections in the transparent glass tube (22) are different; the diameters of the nanometer scattering ions in the transparent glass tube (22) are reduced from bottom to top in sequence.

3. The 3D printing head according to claim 1, wherein: the inner diameter of the upper section of the bullet-shaped discharge pipe (3) is larger than that of the curing pipe (2).

4. The 3D printing head according to claim 1, wherein: the top and the bottom of the scraping ring (46) are fixedly connected with annular blades (5); the inner side of the annular blade (5) is provided with an arc-shaped surface.

5. The 3D printing head according to claim 1, wherein: the lower section inner diameter of the bullet-shaped discharge pipe (3) is larger than the inner diameter of the upper section of the bullet-shaped discharge pipe (3).

6. The 3D printing head according to claim 1, wherein: a compression spring (6) is fixedly connected between the inner sides of the two opposite fixed blocks (41); the compression springs (6) are mutually staggered.