CN113650295A

CN113650295A - 3D is shower nozzle for printer

Info

Publication number: CN113650295A
Application number: CN202110924332.9A
Authority: CN
Inventors: 崔京华
Original assignee: Hebei Chemical and Pharmaceutical College
Current assignee: Hebei Chemical and Pharmaceutical College
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-11-16

Abstract

The invention provides a spray head for a 3D printer, which comprises a base plate, an inner pipe, an outer pipe and an adjusting piece, wherein the inner pipe is rotatably arranged on the base plate and is provided with an inner channel; the outer pipe sleeve is arranged outside the inner pipe and movably arranged on the base plate, an outer channel is limited between the outer pipe and the base plate as well as between the outer pipe and the inner pipe, an outer feeding hole communicated with the outer channel is formed in the base plate, an outer discharging hole is formed in the bottom end of the outer pipe respectively, the distance between the outer discharging hole and the inner discharging hole is adjustable due to the fact that the outer pipe moves relative to the base plate, the adjusting piece is arranged on the outer pipe and can be rotatably arranged on the outer pipe around the axis of the adjusting piece, a plurality of adjusting holes are formed in the adjusting piece, and each adjusting hole can be at least partially overlapped with the outer discharging hole. The spray head for the 3D printer is beneficial to improving the discharging effect of the outer channel, and the spray head has different discharging structures, so that the flexibility of the spray head in use is improved.

Description

3D is shower nozzle for printer

Technical Field

The invention relates to the technical field of 3D printing, in particular to a spray head for a 3D printer.

Background

3D printing, which is one of the rapid prototyping technologies, is also called additive manufacturing, which is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and the like, and by printing layer by layer, based on a digital model file.

The 3D printer has the same working principle as a common printer, but the printing materials are different, the printing materials of the common printer are ink and paper, the 3D printer is internally provided with different printing materials such as metal, ceramic, plastic, sand and the like, and the printing materials are actual raw materials, and after the printer is connected with a computer, the printing materials can be superposed layer by layer through the control of the computer, and finally, a blueprint on the computer is changed into an actual object.

The nozzle in the 3D printer is the main structure for discharging, and usually, the material in a flowing state flows out through a discharging channel in the nozzle. However, due to the fixed structure of the nozzle, the use function is single, for example, only a single solid material can be printed, which not only has the problem of material waste, but also causes the flexibility of the whole printing process to be low.

Disclosure of Invention

In view of this, the present invention provides a nozzle for a 3D printer to improve printing effect.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

A3D is shower nozzle for printer, includes: a substrate; the inner tube is rotatably arranged on the base plate and is provided with an inner channel, an inner feed inlet communicated with the inner channel is formed in the inner tube, an inner discharge outlet is formed in the bottom end of the inner tube, and a stirring part is arranged on the outer shaft wall of the inner tube; the outer tube is sleeved outside the inner tube and movably arranged on the base plate, an outer channel is defined between the outer tube and the base plate as well as between the outer tube and the inner tube, an outer feed inlet communicated with the outer channel is arranged on the base plate, outer feed outlets are respectively arranged at the bottom end of the outer tube, and the distance between the outer feed outlet and the inner feed outlet is adjustable due to the movement of the outer tube relative to the base plate; the regulating part is arranged on the outer pipe and can be rotationally arranged on the outer pipe around the axis of the regulating part, corresponding to the outer material outlet, a plurality of regulating holes are arranged on the regulating part, and the regulating holes can be at least partially overlapped with the outer material outlet due to the rotation of the regulating part.

Further, the stirring part is spirally arranged on the helical blade on the inner pipe, and the specification of the helical blade is gradually reduced along the discharging direction.

Furthermore, be equipped with a plurality of through-holes on the helical blade, the diameter of through-hole sets up along the direction of ejection of compact is gradually littleer.

Furthermore, a threaded hole is formed in the base plate, and the top of the outer tube is movably connected to the base plate through the threaded hole.

Further, the regulating part is located including rotating the outside regulating spindle of outer tube to and can dismantle connect in the regulating plate of regulating spindle bottom, the regulation hole is located on the regulating plate, and at least one of them the center of regulation hole with interval between the regulating spindle varies.

Furthermore, the adjusting plate is provided with a plurality of adjusting arms which are circumferentially arranged at intervals, and the adjusting holes are respectively arranged on the corresponding adjusting arms.

Furthermore, the edge of the adjusting arm corresponding to the adjusting hole is provided with a chamfer.

Furthermore, an annular guide groove is formed in the base plate corresponding to the top end of the adjusting shaft, and the top end of the adjusting shaft slides in the guide groove in a guiding mode.

Further, in be equipped with the connecting hole on the regulating plate, be equipped with the lug on the internal perisporium of connecting hole, corresponding to the lug, in the mounting groove has been constructed on the periphery wall of regulating spindle bottom, the mounting groove includes along axially extended first portion to and link to each other with the first portion, and along the second portion that circumference set up, and in the first portion with the department of linking to each other of second portion is equipped with spacing arch, the lug via the first portion gets into the second portion, and quilt spacing arch limit in the second portion.

Furthermore, the outer surface of the limiting bulge is arc-shaped.

Compared with the prior art, the invention has the following advantages:

(1) according to the spray head for the 3D printer, the stirring part is arranged on the outer peripheral wall of the inner pipe, so that the discharging effect of the outer channel is improved, the distance between the outer discharging opening and the inner discharging opening can be adjusted through the movement of the outer pipe relative to the substrate, different discharging structures of the spray head are improved, the flexibility of the spray head in use is improved, the position and the size of the outer discharging opening are changed through the superposition of at least part of the outer discharging opening through the adjusting hole in the adjusting piece, and the flexibility of the spray head for the 3D printer in use is further improved.

(2) Helical blade's simple structure, stirring effect is good, and helical blade's specification is gradually littleer along the direction of the ejection of compact, then does benefit to and reduces helical blade in use's resistance.

(3) Through the through holes on the helical blades, the resistance in use is further reduced.

(4) The outer tube is installed on the base plate in a threaded connection mode, and is adjustable relative to the position of the base plate, so that the position of the outer discharge hole can be conveniently adjusted.

(5) The adjusting shaft and the adjusting plate are simple in structure and convenient to mount on the outer pipe, and the distance between the center of at least one adjusting hole and the adjusting shaft is unequal, so that the use flexibility of the spray head is improved.

(6) The adjusting arm and the adjusting hole are simple in structure and good in using effect.

(7) The edge of the adjusting arm is provided with the chamfer, so that the adjusting arm can rotate to the outer discharging port, the outer discharging port is matched with the adjusting hole, and meanwhile, the material discharged by the outer discharging port and the inner discharging port can be cut off conveniently.

(8) Through setting up the guide way, do benefit to and improve the stability of regulating spindle when rotating along with the outer tube.

(9) The adjusting plate is conveniently arranged on the adjusting shaft by the first part and the second part which are slid into the mounting groove through the convex block and are positioned in the second part under the limit of the limit bulge.

(10) The outer surface of the limiting bulge is arc-shaped, so that the lug can conveniently cross the limiting bulge, and the adjusting plate and the adjusting shaft can be conveniently mounted and dismounted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a nozzle for a 3D printer according to an embodiment of the present invention at a viewing angle;

fig. 2 is a schematic structural diagram of a nozzle for a 3D printer according to another viewing angle in the embodiment of the present invention;

fig. 3 is a top view of a nozzle for a 3D printer according to an embodiment of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic structural diagram of a substrate according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an outer tube according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of an inner tube according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of an adjustment member according to an embodiment of the present invention;

FIG. 9 is an enlarged view of portion B of FIG. 8;

description of reference numerals:

1. a substrate; 2. an inner tube; 3. an outer tube; 4. a second motor; 5. an adjustment shaft;

101. an annular projection; 102. a convex ring; 103. a first motor; 1031. a driving wheel; 104. an outer feed port;

201. a driven wheel; 202. an inner feed inlet; 203. a transmission belt; 204. a connecting section; 205. a helical blade; 206. a through hole; 207. an inner nozzle;

301. an outer nozzle; 302. an upper mounting block; 303. a lower mounting block; 304. an external thread;

401. a driving gear;

501. an adjusting arm; 5011. an adjustment hole; 502. a driven gear; 503. mounting grooves; 5031. a second portion; 5032. a first portion; 5033. a limiting bulge; 504. and connecting the holes.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The embodiment relates to a 3D is shower nozzle for printer, and on the whole constitutes, this 3D is shower nozzle for printer includes base plate 1, inner tube 2, outer tube 3 and regulating part. Wherein, the inner tube 2 is rotatably arranged on the base plate 1 and is provided with an inner channel, the inner tube 2 is provided with an inner feeding hole 202 communicated with the inner channel, the bottom end of the inner tube 2 is provided with an inner discharging hole, and the outer shaft wall of the inner tube 2 is provided with a stirring part.

Outer tube 3 cover is located outside inner tube 2 to on movably locating base plate 1, inject out outer passageway between outer tube 3 and base plate 1 and the inner tube 2, be equipped with the outer feed inlet 104 that is linked together with outer passageway on the base plate 1, the bottom of outer tube 3 is equipped with out the discharge gate respectively, and because of outer tube 3 for the removal of base plate 1, the interval between outer discharge gate and the interior discharge gate is adjustable. The adjusting member is arranged on the outer tube 3 and can be rotatably arranged on the outer tube 3 around the axis of the adjusting member, a plurality of adjusting holes 5011 are arranged on the adjusting member corresponding to the outer material outlet, and each adjusting hole 5011 can be at least partially overlapped with the outer material outlet due to the rotation of the adjusting member.

Based on the above design concept, an exemplary structure of the nozzle for the 3D printer of the present embodiment is shown in fig. 1 and fig. 2, wherein the substrate 1 is used as a mounting base, and the structure is simple and is convenient for design and implementation. The inner tube 2 is constructed as shown in fig. 3, 4 and 7, and in order to facilitate the installation of the inner tube 2 on the base plate 1, in the present embodiment, a bearing is provided on the base plate 1, a connecting section 204 is provided on the top of the inner tube 2, the connecting section 204 has a radial cross-sectional area smaller than that of the inner tube 2, and the connecting section 204 is installed on the inner ring of the bearing and is provided to protrude from the base plate 1. The inner feed port 202 is disposed at the top of the connecting section 204.

In this embodiment, an inner nozzle 207 is connected to the inner discharge hole of the inner tube 2, and the bottom of the inner nozzle 207 is tapered, and can be connected to the bottom end of the inner tube 2 by a screw connection. In order to realize the rotatable installation of the inner tube 2 on the substrate 1, as shown in fig. 1 to fig. 3, a first motor 103 is disposed on the upper surface of the substrate 1, a driving wheel 1031 is connected to a power output end of the first motor 103, a driven wheel 201 is disposed on the connecting section 204, and a transmission belt 203 is sleeved on the driving wheel 1031 and the driven wheel 201. Under the driving of the first motor 103, the driving wheel 1031 drives the driven wheel 201 to drive the inner tube 2 to rotate through the transmission belt 203.

The stirring section in this embodiment is a helical blade 205 that is helically provided on the inner tube 2, and the helical blade 205 is formed so that its size is gradually reduced in the discharge direction. As shown in fig. 4, the spiral blades 205 are arranged spirally downward in the direction from top to bottom so as to improve the stirring effect of the material in the outer passage. The specification of the spiral blade 205 means that the distance between the edge of the spiral blade 205 and the axis of the inner tube 2 is set to be gradually smaller in the direction from the top to the bottom. So do benefit to when stirring the material, reduce the resistance of stirring.

In addition, in order to further reduce the resistance of the spiral blade 205 in use, in the present embodiment, a plurality of through holes 206 are provided on the spiral blade 205, and the diameter of the through holes 206 is set to be smaller along the discharging direction. Preferably, the through holes 206 on two adjacent helical blade 205 segments are staggered.

In this embodiment, the outer tube 3 is cylindrical and has an open top. The outer tube 3 is arranged coaxially with the inner tube 2. To facilitate the installation of the outer tube 3, in the present embodiment, a threaded hole is provided on the base plate 1, and the top of the outer tube 3 is movably connected to the base plate 1 via the threaded hole. Specifically, as shown in fig. 5 and 6, an external thread 304 is provided on the outer peripheral wall of the top of the outer tube 3, a collar 102 is provided on the bottom of the base plate 1 corresponding to the outer tube 3, and an internal thread is provided on the inner wall surface of the collar 102. The outer tube 3 is connected to the base plate 1 by a threaded connection of the external thread 304 and the internal thread. Further, an outer nozzle 301 is screwed to an outer port at the bottom of the outer tube 3, and the bottom of the outer nozzle 301 is tapered.

In this embodiment, the outer tube 3 is connected to the base plate 1 in a threaded connection manner, which is convenient to install, and the position of the outer tube 3 can be adjusted only by changing the length of the threaded connection between the protrusion and the outer tube 3, so as to change the distance between the discharge ports of the outer nozzle 301 and the inner nozzle 207. In this embodiment, the discharging effect of the nozzle can be changed by changing the distance between the discharge ports of the outer nozzle 301 and the inner nozzle 207 and the discharging condition of the inner tube 2 and/or the outer tube 3.

Specifically, when only the inner tube 2 or the outer tube 3 is discharged, a single solid structure can be excluded, and when the inner tube 2 and the outer tube 3 are discharged separately, solid materials can be discharged. When the distance between the discharge ports of the outer nozzle 301 and the inner nozzle 207 is large, the specification of the material between the inner tube 2 and the outer tube 3 is large, and conversely, the specification of the material is small.

The adjusting part in this embodiment includes that the rotation locates the outside regulating spindle 5 of outer tube 3 to and can dismantle the regulating plate of connecting in regulating spindle 5 bottom, adjust on the hole 5011 locates the regulating plate, and the interval between the center of at least one of its regulating hole 5011 and regulating spindle 5 varies.

In particular, referring to fig. 1, 2, and 8, the adjustment shaft 5 in the present embodiment is arranged parallel to the axial direction of the outer tube 3. In order to facilitate the installation of the adjusting shaft 5, in the present embodiment, the outer peripheral wall of the outer tube 3 is provided with upper and lower mounting

blocks

302 and 303 arranged at intervals in the height direction, on which upper and lower bearings are respectively mounted, and the adjusting shaft 5 is disposed through inner rings of the upper and lower bearings. The lower mounting plate is provided with a second motor 4, the second motor 4 is provided with a driving gear 401, a driven gear 502 is arranged on the adjusting shaft 5 corresponding to the driving gear 401, and the driving gear 401 and the driven gear 502 are in meshing transmission under the driving of the second motor 4 so as to drive the adjusting shaft 5 to rotate.

The adjusting plate in this embodiment is connected to the bottom end of the adjusting shaft 5, and has three adjusting arms 501 arranged circumferentially around the adjusting shaft at intervals, and three adjusting holes 5011 are respectively provided on the corresponding adjusting arms 501. The two second adjusting holes 5011 have the same distance between the centers and the adjusting shaft 5, but have different diameters. When the adjusting hole 5011 with larger specification in the two holes rotates to the discharge hole of the outer nozzle 301, the adjusting hole 5011 and the discharge hole are completely overlapped. When the adjusting hole 5011 with smaller specification in the two parts rotates to the discharge port of the outer nozzle 301, the adjusting hole 5011 is coaxial with the discharge port, but covers the periphery of the discharge port, so that the area of the actual discharge port is reduced.

In this embodiment, when the third adjusting hole 5011 of the three adjusting holes 5011 rotates to the discharge hole of the outer nozzle 301, it is not concentric with the discharge hole, and at the same time, it forms a partial cover for the discharge hole, so that a non-coaxial structural arrangement is formed between the actual discharge hole and the discharge hole of the inner nozzle 207.

It can be understood that, in this embodiment, the number of the adjusting arms 501 can be increased or decreased according to specific requirements, and the specification of the adjusting holes 5011 can also be designed according to specific requirements, as long as the specification of the adjusting outlet is satisfied.

In order to improve the use effect of the adjusting arm 501, in the embodiment, the edge of the adjusting arm 501 corresponding to the adjusting hole 5011 is provided with a chamfer. So set up, not only be convenient for adjusting arm 501 to rotate to the bottom of outer nozzle 301 to the butt is on the bottom surface of outer nozzle 301, but also does benefit to and cuts off inner tube 2 and the discharged material of outer tube 3.

In the present embodiment, an annular guide groove is provided in the base plate 1 corresponding to the tip end of the adjustment shaft 5, and the tip end of the adjustment shaft 5 is guided to slide in the guide groove. In this embodiment, two annular protrusions 101 are disposed at intervals on the substrate 1, and a guide groove is defined between the two annular protrusions 101 and the substrate 1. Through setting up the guide way, do benefit to and improve the stability of adjusting shaft 5 when rotating along with outer tube 3.

In order to facilitate replacement of the adjustment plate, as shown in fig. 9, in the present embodiment, an attachment hole 504 is provided on the adjustment plate, a projection is provided on an inner peripheral wall of the attachment hole 504, a mounting groove 503 is formed on an outer peripheral wall of the bottom end of the adjustment shaft 5 corresponding to the projection, the mounting groove 503 includes a first portion 5032 extending in the axial direction, and a second portion 5031 connected to the first portion 5032 and provided in the circumferential direction, and a stopper protrusion 5033 is provided at a connection between the first portion 5032 and the second portion 5031. Wherein the opening of the first segment 5032 is located at the bottom end of the adjusting shaft 5, the bump can slide into the first segment 5032 along the axial direction of the adjusting shaft 5, and when the end of the first segment 5032 is located, the bump can slide into the second segment 5031 beyond the limit protrusion 5033 by rotating the adjusting plate, and is limited in the second segment 5031 by the limit protrusion 5033.

When the adjusting plate needs to be replaced, the adjusting plate is rotated reversely, the bump is made to pass over the limiting protrusion 5033, and then the bump is slid out from the first portion 5032 along the axial direction of the adjusting shaft 5.

Preferably, in this embodiment, the outer surface of the limit protrusion 5033 is formed in a circular arc shape, so that the protrusion can pass over the limit protrusion 5033, thereby facilitating the installation and removal of the adjusting plate and the adjusting shaft 5. It should be noted that, in order to improve the connection effect between the adjusting plate and the adjusting shaft 5, the adjusting shaft 5 rotates in the same direction as the direction in which the protrusion slides into the second portion 5031.

When the nozzle for the 3D printer shown in this embodiment is used, when there is a material in the outer channel, the first motor 103 is started to drive the inner tube 2 to rotate, and the material in the outer channel is stirred by the helical blade 205. When the specification of the discharge port needs to be changed, the corresponding adjusting hole 5011 is adjusted to the bottom of the discharge port of the outer nozzle 301 by starting the second motor 4.

This embodiment 3D is shower nozzle for printer, through the stirring portion that sets up on the periphery wall of inner tube 2, do benefit to the ejection of compact effect that improves outer passageway, and through outer tube 3 for base plate 1's removal, and adjustable play discharge gate and interior discharge gate between the interval, thereby make the different ejection of compact structures of shower nozzle, do benefit to the flexibility that improves shower nozzle in use, still through the at least partial coincidence of the outer discharge gate of regulation hole 5011 on the regulating part, and do benefit to and change the position and the size of going out the discharge gate, thereby further improve 3D is shower nozzle for printer in use's flexibility.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a shower nozzle for 3D printer which characterized in that includes:

a substrate (1);

the inner tube (2) is rotatably arranged on the base plate (1) and is provided with an inner channel, an inner feeding hole (202) communicated with the inner channel is formed in the inner tube (2), an inner discharging hole is formed in the bottom end of the inner tube (2), and a stirring part is arranged on the outer shaft wall of the inner tube (2);

the outer tube (3) is sleeved outside the inner tube (2) and movably arranged on the substrate (1), an outer channel is defined between the outer tube (3) and the substrate (1) and between the outer tube and the inner tube (2), an outer feed inlet (104) communicated with the outer channel is arranged on the substrate (1), an outer feed outlet is respectively arranged at the bottom end of the outer tube (3), and the distance between the outer feed outlet and the inner feed outlet is adjustable due to the movement of the outer tube (3) relative to the substrate (1);

the adjusting part is located on outer tube (3) to can locate with rotating around self axis on outer tube (3), corresponding to go out the material mouth, in be equipped with a plurality of regulation holes (5011) on the adjusting part, because of the rotation of adjusting part, each regulation hole (5011) can with go out the material mouth at least partially coincide.

2. The head for a 3D printer according to claim 1, wherein: the stirring part is spirally arranged on a helical blade (205) on the inner pipe (2), and the specification of the helical blade (205) is gradually reduced along the discharging direction.

3. The head for a 3D printer according to claim 2, wherein: the spiral blade (205) is provided with a plurality of through holes (206), and the diameter of the through holes (206) is gradually reduced along the discharging direction.

4. The head for a 3D printer according to claim 1, wherein: the base plate (1) is provided with a threaded hole, and the top of the outer tube (3) is movably connected to the base plate (1) through the threaded hole.

5. The head for a 3D printer according to any one of claims 1 to 4, wherein: the regulating part is located including rotating outer tube (3) outside regulating spindle (5), and can dismantle connect in the regulating plate of regulating spindle (5) bottom, regulation hole (5011) are located on the regulating plate, and at least one of them the center of regulation hole (5011) with interval between regulating spindle (5) varies.

6. The head for a 3D printer according to claim 5, wherein: the adjusting plate is provided with a plurality of adjusting arms (501) which are arranged at intervals in the circumferential direction of the ring, and the adjusting holes (5011) are respectively formed in the corresponding adjusting arms (501).

7. The head for a 3D printer according to claim 6, wherein: the edge of the adjusting arm (501) corresponding to the adjusting hole (5011) is provided with a chamfer.

8. The head for a 3D printer according to claim 5, wherein: corresponding to the top end of the adjusting shaft (5), an annular guide groove is formed in the base plate (1), and the top end of the adjusting shaft (5) slides in the guide groove in a guiding mode.

9. The head for a 3D printer according to claim 5, wherein: the adjusting plate is provided with a connecting hole (504), the inner peripheral wall of the connecting hole (504) is provided with a bump, a mounting groove (503) is formed on the outer peripheral wall of the bottom end of the adjusting shaft (5) corresponding to the bump, the mounting groove (503) comprises a first part (5032) extending along the axial direction and a second part (5031) connected with the first part (5032) and arranged along the circumferential direction, a limiting bulge (5033) is arranged at the connection position of the first part (5032) and the second part (5031), and the bump enters the second part (5031) through the first part (5032) and is limited in the second part (5031) by the limiting bulge (5033).

10. The head for a 3D printer according to claim 9, wherein: the outer surface of the limiting protrusion (5033) is arc-shaped.