CN217258427U

CN217258427U - 3D printing nozzle device

Info

Publication number: CN217258427U
Application number: CN202121747469.3U
Authority: CN
Inventors: 姚彩虹; 罗盟; 王轩; 顾成言
Original assignee: Shenzhen Collaborative Innovation High Tech Development Co ltd
Current assignee: Shenzhen Collaborative Innovation High Tech Development Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-08-23
Anticipated expiration: 2031-07-27

Abstract

The application discloses a 3D printing nozzle device, which comprises a feeding mechanism and a nozzle mechanism; the feeding mechanism is used for feeding raw materials to the spray head mechanism; the spray head mechanism is used for printing the composite material containing the continuous fibers and comprises a support frame, a first driving piece, a second driving piece, a spray head and a shearing knife; the first driving piece is arranged on the support frame and is in driving connection with the spray head so as to drive the spray head to stretch and retract; the second driving piece is arranged on the supporting frame and is in driving connection with the shearing knife so as to drive the shearing knife to shear; the shearing knives are arranged on two sides of the spray head, when the spray head stretches out and prints, the shearing knives are used for avoiding the spray head, when the spray head contracts, the shearing knives are closed to shear continuous fibers sprayed by the spray head, and the shearing position when the shearing knives are closed to shear corresponds to the material spraying opening of the spray head when the spray head stretches out.

Description

3D printing nozzle device

Technical Field

The application relates to the field of 3D printing, in particular to a 3D printing spray head device.

Background

Continuous carbon fiber printing in the field of 3D printing is to form a composite material carrying continuous fibers by mixing fiber wires and thermoplastic matrix materials and then extruding the mixture, but in the printing process, skip point printing is often required, and if continuous fibers are continuous in the skip point printing process, the quality of printed parts can be affected, or parts which are not consistent with required parts are generated in the printing process.

In order to solve the problem that the jumping point printing continuous fiber is not continuous, the existing printer cuts the continuous fiber by additionally arranging a cutting mechanism outside or additionally arranging a cutting mechanism inside a spray head, the former uses the cutting mechanism to cut off the continuous fiber between a spray nozzle and a part of the spray head, but a section of fiber filament is left at the spray nozzle of the spray head in the mode, and a section of fiber filament is left between the internal cutting position of the spray head and the spray nozzle after the latter cuts, so that the section of fiber filament is required to be retracted or extended to the spray nozzle during secondary printing after the jumping point, the size is not easy to control and the error is easy to occur, and a section of fiber filament is easily left at the breakpoint position of the part in the two modes, so that the quality of the part is influenced.

SUMMERY OF THE UTILITY MODEL

The application provides a 3D prints shower nozzle device, through the shrink shower nozzle, makes to cut the sword and can cut the breakpoint department of part, has guaranteed the quality of part when guaranteeing the precision that the secondary was printed behind the jumping point.

The application discloses a 3D printing nozzle device, which comprises a feeding mechanism and a nozzle mechanism;

the feeding mechanism is used for feeding raw materials to the spray head mechanism;

the spray head mechanism is used for printing a composite material containing continuous fibers and comprises a support frame, a first driving piece, a second driving piece, a spray head and a shearing knife;

the first driving piece is arranged on the support frame and is in driving connection with the spray head so as to drive the spray head to stretch;

the second driving piece is arranged on the supporting frame and is in driving connection with the shearing knife so as to drive the shearing knife to shear;

the shearing knives are arranged on two sides of the sprayer, when the sprayer stretches out and prints, the shearing knives are opposite to the sprayer, when the sprayer shrinks, the continuous fibers sprayed by the sprayer are sheared by the closing of the shearing knives, and the shearing positions of the shearing knives when the shearing knives are sheared are corresponding to the material spraying openings of the sprayer when the sprayer stretches out.

In one embodiment, the supporting frame is provided with a first guide hole, and the shearing knife is provided with a guide supporting block which is in sliding fit with the first guide hole;

a connecting block is arranged at the driving end of the second driving piece, second guide holes are formed in the two ends of the connecting block, a guide driving block is arranged at one end, away from the cutting edge, of the shearing knife, and the guide driving block passes through the first guide hole and is in sliding fit with the second guide holes;

the second driving piece drives the connecting block to move, and then the second guide hole and the guide driving block are matched to drive the shearing knife to move along the extending direction of the first guide hole.

In one embodiment, the first guide holes are arranged in an opposite inclined manner, and extension lines of the first guide holes converge towards the shearing direction to intersect at a point.

In one embodiment, the guide support block and the guide driving block are cylindrical structures.

In one embodiment, the first guide hole and the second guide hole are oblong holes.

In one embodiment, the cutting edge of the cutting knife extends in a direction parallel to the horizontal plane.

In one embodiment, the spray head comprises a spray nozzle and a heating block provided with a first feed port, a second feed port and a discharge port;

the spraying port is arranged at one end of the nozzle, and the other end of the nozzle is connected with the heating block through the discharging port;

wherein, feeding mechanism passes through first feed inlet sends the fiber wire to the heating piece, feeding mechanism passes through the second feed inlet sends the thermoplasticity matrix material to the heating piece, the heating piece heats the composite material that mixes formation contains continuous fibers to fiber wire and thermoplasticity matrix material, and follow the spout mouth blowout.

In one embodiment, the feeding mechanism comprises a first material tray, a second material tray, a first feeding driving part and a second feeding driving part;

the first feeding driving part is used for feeding the fiber wires of the first material tray to the heating block through the first feeding hole;

and the second feeding driving part is used for feeding the thermoplastic matrix materials of the second material tray to the heating block through the second feeding hole.

In an embodiment, the first feeding driving member and the second feeding driving member are respectively connected with the first feeding port and the second feeding port through guide pipes.

In one embodiment, the showerhead further comprises a heat sink;

the radiating block is connected with the heating block through the second feed inlet so as to radiate heat conducted from the heating block to the thermoplastic matrix material through the second feed inlet.

By last knowing, in the 3D print nozzle device of this application, shrink through setting up first driving piece drive shower nozzle, form one section cellosilk between the material spraying mouth that makes the shower nozzle and the part, the second driving piece drive is cut the cellosilk of sword to the material spraying mouth department of shower nozzle and is carried out the normal position and cut afterwards, make part breakpoint department can not remain one section cellosilk, the quality of part has been guaranteed, under material feeding mechanism's pulling, the cellosilk of remaining in the material spraying mouth of shower nozzle is withdrawed to the shower nozzle in and the position of its breakpoint department is unanimous with the position of shower nozzle material spraying mouth, the precision of secondary printing after the jumping point has been guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printing nozzle device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a nozzle mechanism according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a shearing knife provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of another state of the shearing knife provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of a showerhead provided in an embodiment of the present application.

Detailed Description

The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will make the advantages and features of the present application more readily appreciated by those skilled in the art, and thus will more clearly define the scope of the invention. In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1 and 2, fig. 1 illustrates a structure of a 3D printing head device provided in an embodiment of the present application, and fig. 2 illustrates a structure of a head mechanism provided in an embodiment of the present application.

As shown in fig. 1 and fig. 2, the present application discloses a 3D printing nozzle device, which includes a feeding mechanism 1 and a nozzle mechanism 2; the feeding mechanism 1 is used for feeding raw materials to the spray head mechanism 2; the nozzle mechanism 2 is used for printing composite materials containing continuous fibers and comprises a support frame 21, a first driving part 22, a second driving part 23, a nozzle 24 and a shearing knife 25; the first driving part 22 is arranged on the support frame 21 and is in driving connection with the spray head 24 so as to drive the spray head 24 to extend and retract; the second driving part 23 is arranged on the supporting frame 21 and is in driving connection with the shearing knife 25 so as to drive the shearing knife 25 to shear; wherein, shearing sword 25 is located the both sides of shower nozzle 24, and when shower nozzle 24 stretched out and printed, shearing sword 25 was kept away the position to shower nozzle 24, and when shower nozzle 24 shrink, shearing sword 25 closed was cuted the continuous fiber that shower nozzle 24 jetted out, and the department of cuting when shearing sword 25 closed was cuted corresponds with the material mouth department of shower nozzle 24 when shower nozzle 24 stretched out.

Specifically, the raw materials include fiber strands and a thermoplastic matrix material, and the feeding mechanism 1 feeds the fiber strands and the thermoplastic matrix material to the nozzle 24 to be mixed to form a composite material including continuous fibers and performs ejection printing. The second driving member 23 is drivingly connected to an end of the cutting blade 25 remote from the cutting edge, so as to drive the cutting edges of the cutting blade 25 to close or open toward each other.

When continuous non-breakpoint printing is required, the second driving part 23 drives the shearing cutter 25 to separate and open to avoid the nozzle 24, then the first driving part 22 drives the nozzle 24 to stretch out and print, when skip printing is required, the first driving part 22 drives the nozzle 24 to shrink, under the effect of shrinking, a section of fiber filament is formed between the material spraying opening of the nozzle 24 and a part, then the second driving part 23 drives the shearing cutter 25 to close oppositely to shear the section of fiber filament, because the shearing position corresponds to the material spraying opening of the nozzle 24 when the nozzle 24 stretches out, namely the original point of the part is sheared, the part cannot leave a section of fiber filament, then the second driving part 23 drives the shearing cutter 25 to separate and open to avoid the nozzle 24, the first driving part 22 drives the nozzle 24 to stretch out, under the pulling of the feeding mechanism 1, the fiber filament left in the material spraying opening of the nozzle 24 is withdrawn into the nozzle 24, and the position of the material spraying opening of the nozzle 24 is consistent with the position of the material spraying opening of the nozzle 24 Subsequently, the head mechanism 2 is transferred to the jumping point position, and secondary printing is performed.

It is understood that the first driving member 22 and the second driving member 23 can be driven by a motor, a cylinder, etc. as is common in the art, and therefore, the embodiment of the present application is not limited to the type of the driving member used.

Referring to fig. 3 and 4, fig. 3 shows a structure of a cutting blade provided in an embodiment of the present application, and fig. 4 shows a structure of another state of the cutting blade provided in an embodiment of the present application.

As shown in fig. 3 and 4, the supporting frame 21 is provided with a first guiding hole, and the shearing blade 25 is provided with a guiding supporting block 251 which is in sliding fit with the first guiding hole; a connecting block 231 is arranged at the driving end of the second driving piece 23, second guide holes are formed in the two ends of the connecting block 231, a guide driving block 252 is arranged at one end, far away from the cutting edge, of the shearing knife 25, and the guide driving block 252 passes through the first guide hole and is in sliding fit with the second guide holes; the second driving member 23 drives the connecting block 231 to move, and further drives the shearing blade 25 to move along the extending direction of the first guide hole through the second guide hole and the guide driving block 252 in a matching manner.

Specifically, the supporting frame 21 includes a first supporting plate 211 and a second supporting plate 212, the first supporting plate 212 and the second supporting plate 212 are connected through a cross rod 213, the first driving member 22 is disposed on the first supporting plate 211, the second driving member 23 is disposed on the second supporting plate 212, the first guiding hole is obliquely disposed on the second supporting plate 212 and forms an inverted "eight" shape, and the second guiding hole is transversely disposed at two ends of the connecting block 231. The guiding supporting block 251 is disposed in the middle of the cutting blade 25 to guide and support the cutting blade 25 by sliding fit with the first guiding hole, the guiding driving block 252 is disposed at one end of the cutting blade 25 away from the cutting edge and is located at the same side as the guiding supporting block 251, and the guiding driving block 252 passes through the first guiding hole and is in sliding fit with the second guiding hole, so that the second supporting plate 212 is clamped between the cutting blade 25 and the connecting block 231. The distance between the guide supporting block 251 and the guide driving block 252 is less than the length of the first guide hole so that the guide supporting block 251 and the guide driving block 252 can slide in the first guide hole.

Under the driving of the second driving element 23, the connecting block 231 drives the guide driving block 252 through the second guide holes at the two ends, and in the driving process, the guide driving block 252 moves in the extending direction of the first guide hole, so that the shearing blades 25 move along the extending direction of the first guide hole, and the shearing blades 25 are closed toward each other or opened away from each other.

Specifically, one end of each first guide hole in the direction of the cutting position is relatively close to each other and is located at the same height, and one end of each first guide hole, which is far away from the cutting position, is relatively far away from each other and is located at the same height, so that the cutting blades 25 are closed towards each other or opened away from each other under the action of the first guide holes, and the cutting blades between the cutting blades 25 are aligned at the same height, so that the cutting is completed.

In one embodiment, the guide support block 251 and the guide driving block 252 have a cylindrical structure. Through setting up the cylinder structure, can make direction supporting shoe 251 and direction drive block 252 reduce with the area of contact of first guiding hole and second guiding hole, and then reduce frictional force, make the slip of direction supporting shoe 251 and direction drive block 252 at first guiding hole and second guiding hole more laborsaving.

In one embodiment, the first guide hole and the second guide hole are oblong holes. By providing the oblong holes, the cylindrical structures of the guide support block 251 and the guide driving block 252 can be better matched.

In one embodiment, the cutting edge of the shear blade 25 extends parallel to the horizontal plane. So that the cutting edges of the shearing knives 25 are relatively attached to the parts when shearing, and the fiber filaments remained on the parts are sheared more cleanly.

Referring to fig. 5, fig. 5 shows a structure of a showerhead provided in an embodiment of the present application.

As shown in fig. 5, the spray head 24 includes a spray nozzle 241 and a heating block 242 provided with a first inlet, a second inlet and an outlet; the spray opening is arranged at one end of the spray nozzle 241, and the other end of the spray nozzle 241 is connected with the heating block 242 through the discharge opening; the feeding mechanism 1 sends the fiber wire to the heating block 242 through the first feeding hole, the feeding mechanism 1 sends the thermoplastic matrix material to the heating block 242 through the second feeding hole, and the heating block 242 heats and mixes the fiber wire and the thermoplastic matrix material to form a composite material containing continuous fibers, namely a continuous fiber reinforced thermosetting resin matrix composite material wire, and the composite material wire is sprayed out from the spraying hole.

Specifically, a channel is arranged in the heating block 242 and connected with the first feed inlet, the second feed inlet and the discharge outlet, so that the fiber wires and the thermoplastic matrix material enter from the first feed inlet and the second feed inlet respectively and are heated and mixed by the heating block 242 and then are discharged from the discharge outlet, the nozzle 241 is arranged in a through manner, one end of the nozzle 241 is a spray port, the other end of the nozzle 241 is connected with the heating block 242 through the discharge outlet, and the composite material containing continuous fibers and discharged from the discharge outlet flows through the nozzle 241 and is sprayed out from the spray port.

Referring back to fig. 1, the feeding mechanism 1 includes a first tray 11, a second tray 12, a first feeding driving member 13 and a second feeding driving member 14; the first feeding driving part 13 is used for feeding the fiber wires in the first tray 11 to the heating block 242 through the first feeding hole; the second feeder drive 14 is adapted to feed the thermoplastic matrix material from the second tray 12 through the second feed opening to the heating block 242.

Specifically, the first tray 11 and the second tray 12 are of roller structures and are rotatably arranged, the first tray 11 is used for winding and storing fiber wires, the second tray 12 is used for winding and storing thermoplastic matrix materials, the driving end of the first feeding driving part 13 is connected with the fiber wires in a winding manner and is driven by the first feeding driving part 13 to convey the fiber wires to the heating block 242 through the first feeding hole, the driving end of the second feeding driving part 14 is connected with the thermoplastic matrix materials in a winding manner and is driven by the second feeding driving part 14 to convey the thermoplastic matrix materials to the heating block 242 through the second feeding hole.

It can be understood that the first feeding driving element 13 and the second feeding driving element 14 can adopt driving elements such as a motor, a cylinder, etc. which are common in the art according to actual situations, and therefore, the embodiment of the present application does not limit the type of the driving elements which are specifically adopted.

In one embodiment, the first and second feed drives 13, 14 are connected to the first and second feed openings, respectively, by guide tubes 15. By providing the guide tube 15, the fiber filament material and the thermoplastic matrix material can be accurately fed into the first feed port and the second feed port, respectively.

In one embodiment, the showerhead 24 further includes a heat sink 243; the heat slug 243 is coupled to the heating block 242 through the second feed port to dissipate heat conducted by the heating block 242 to the thermoplastic matrix material through the second feed port.

Specifically, the heat dissipation block 243 is disposed through to form two openings, one of the openings is connected to the heating block 242 through the second feeding hole, and the other opening is connected to the guide tube 15. Since the heating block 242 easily conducts heat to the thermoplastic matrix material through the second feeding port during heating, the state of the thermoplastic matrix material transferred between the first tray 11 and the heating block 242 is affected, and the printing quality is affected, and the heat is prevented from being conducted to the thermoplastic matrix material through the heat dissipation block 243 to affect the state of the thermoplastic matrix material, so that the printing quality is prevented from being affected.

By last knowing, in the 3D print nozzle device of this application, drive shower nozzle 24 through setting up first driving piece 22 and shrink, form one section cellosilk between the material spraying mouth of messenger's shower nozzle 24 and the part, the cellosilk of second driving piece 23 drive shearing sword 25 department to the material spraying mouth of shower nozzle 24 carries out the normal position shearing afterwards, make part breakpoint department can not remain one section cellosilk, the quality of part has been guaranteed, under the pulling of feeding mechanism 1, the cellosilk of the material spraying mouth of remaining in shower nozzle 24 is withdrawed to the shower nozzle 24 in and the position of its breakpoint department is unanimous with the position of shower nozzle 24 material spraying mouth, the precision of secondary printing after the jumping point has been guaranteed.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.

Claims

1. A3D printing nozzle device is characterized by comprising a feeding mechanism and a nozzle mechanism;

the spray head mechanism is used for printing the composite material containing the continuous fibers and comprises a support frame, a first driving piece, a second driving piece, a spray head and a shearing knife;

the first driving piece is arranged on the support frame and is in driving connection with the spray head so as to drive the spray head to stretch and retract;

2. The 3D printing nozzle device according to claim 1, wherein the supporting frame is provided with a first guiding hole, and the shearing knife is provided with a guiding supporting block which is in sliding fit with the first guiding hole;

3. The 3D printing head device according to claim 2, wherein the first guiding holes are inclined toward each other, and extension lines of the first guiding holes converge toward the shearing direction to intersect at a point.

4. The 3D print head apparatus of claim 2, wherein the guide support block and the guide drive block are cylindrical structures.

5. The 3D printing head device of claim 2, wherein the first and second guide holes are oblong holes.

6. The 3D print head apparatus of claim 1, wherein the cutting edge of the shearing blade extends parallel to a horizontal plane.

7. The 3D printing nozzle device according to claim 1, wherein the nozzle comprises a nozzle and a heating block provided with a first inlet, a second inlet and an outlet;

wherein, feeding mechanism sends fibre wire material to the heating piece through first feed inlet, feeding mechanism sends thermoplastic matrix material to the heating piece through the second feed inlet.

8. The 3D printing nozzle device of claim 7, wherein the feeding mechanism comprises a first tray, a second tray, a first feeding driving member and a second feeding driving member;

the second feeding driving part is used for feeding the thermoplastic matrix materials of the second material disc to the heating block through the second feeding hole.

9. The 3D print head apparatus of claim 8, wherein the first feed drive and the second feed drive are connected to the first feed port and the second feed port, respectively, by guide tubes.

10. The 3D printing nozzle device of claim 7, wherein the nozzle further comprises a heat sink;