CN214188479U

CN214188479U - Micro nozzle for 3D printer

Info

Publication number: CN214188479U
Application number: CN202023039285.XU
Authority: CN
Inventors: 王博; 张淮
Original assignee: Senbo Yancheng 3d Technology Co ltd
Current assignee: Senbo Yancheng 3d Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-09-14
Anticipated expiration: 2030-12-17

Abstract

The utility model discloses a micro nozzle for a 3D printer, which comprises a motor, a screw rod, a nozzle and a shell, wherein the shell comprises a fixed plate and a cover body, the cover body is fixedly arranged at one end of the fixed plate, the cover body is internally provided with an accommodating cavity which is filled with plastic particles, a motor mounting hole and a feeding hole are arranged on a fixing plate, a discharging hole is coaxially arranged at the position of the cover body corresponding to the motor mounting hole, the motor is fixedly arranged on the fixing plate, an output shaft of the motor extends into the accommodating cavity through the motor mounting hole to be connected with the screw rod, a discharge pipeline is horizontally and fixedly connected at the discharge hole on the cover body, an inner thread is arranged on an inner hole at one end of the discharge pipeline far away from the cover body, the section of internal thread is connected with a nozzle through a thread, a heating device is arranged at the position, close to the nozzle, of the discharging pipeline, the heating device can melt plastic particles, and the molten plastic particles are extruded out from a spray hole in the nozzle under the driving of a motor.

Description

Micro nozzle for 3D printer

Technical Field

The utility model relates to a 3D prints technical field, in particular to micro nozzle for 3D printer.

Background

The 3D printer, also called three-dimensional printer, is a machine of an accumulative manufacturing technique, i.e. a rapid prototyping technique, which is a machine based on a digital model file, and manufactures a three-dimensional object by printing a layer of adhesive material by using a special wax material, powdered metal or plastic and the like. State of the art three-dimensional printers are used to manufacture products. Techniques for building objects in a layer-by-layer printing manner. The principle of the 3D printer is that data and raw materials are put into the 3D printer, and the machine can build the product layer by layer according to the program. Most of the nozzles of the existing printer are large in size, complex in structure, single in function and incapable of controlling the heating temperature, so that the nozzles of the existing printer need to be redesigned in the prior art.

SUMMERY OF THE UTILITY MODEL

According to the not enough of above prior art, the utility model provides a micro nozzle for 3D printer.

In order to solve the technical problem, the utility model provides a micro nozzle for 3D printer, which comprises a motor, a screw rod, a nozzle and a shell, wherein the shell comprises a fixed plate and a cover body, the cover body is fixedly arranged at one end of the fixed plate, a containing cavity is arranged in the cover body, plastic particles are filled in the containing cavity, the containing cavity is cut along a front symmetrical central plane and a rear symmetrical central plane to form a trapezoid, a motor mounting hole and a feeding hole are arranged on the fixed plate, the position of the cover body corresponding to the motor mounting hole is coaxially provided with a discharging hole, the motor is fixedly arranged on the fixed plate, an output shaft of the motor extends into the containing cavity through the motor mounting hole to be connected with the screw rod, the screw rod and a motor output shaft are coaxially designed, one end of the screw rod extends out through the discharging hole, a discharging pipeline is horizontally and fixedly connected at the discharging hole on the cover body, the inner diameter of the discharging pipeline is in clearance fit with the thread major diameter of the screw rod, an inner thread is arranged on an inner hole at one end of the discharging pipeline far away from the cover body, a nozzle is in threaded connection with the inner thread, a spray hole is formed in the nozzle, when the nozzle is screwed into the discharging pipeline completely, a gap of 3-5MM is reserved between the right end face of the nozzle and the left end face of the screw, and a heating device is arranged at the position, close to the nozzle, of the discharging pipeline.

Preferably, heating device includes through double-screw bolt connection together last heating block and lower heating block, and the lower terminal surface of going up the heating block is opened there is last semicircular groove, and the up end of lower heating block is opened has lower semicircular groove, goes up the semicircular groove and constitutes a round hole form heating channel down between the semicircular groove, and the internal diameter of heating channel suits with the external diameter of ejection of compact pipeline, go up and all open the patchhole on heating block and the lower heating block, install the heating rod in the patchhole.

Preferably, one side of the discharge pipeline close to the cover body is provided with a heat dissipation device, and the heat dissipation device comprises a plurality of circles of heat dissipation fins arranged on the outer ring of the discharge pipeline.

Preferably, four adjusting holes are uniformly distributed on the left end face of the cover body and communicated with the accommodating cavity, and the four adjusting holes are communicated with the air pressure adjusting valve through pipelines.

Preferably, the upper heating block is provided with an induction hole, and a temperature sensor is arranged in the induction hole.

The utility model discloses an gain effect: the utility model discloses a micro nozzle for 3D printer is provided with heating device, and this heating device is inside to be provided with temperature sensor, but through the temperature in the real-time detection heating channel of temperature sensor to can connect outside controller, adjust the temperature of heating rod through the controller, it is convenient more intelligent for prior art, in addition the utility model is still provided with heat abstractor, thereby can help cooling discharge pipe through heat abstractor, make the radiating effect good, and can guarantee that the practical size is less.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a front view of the utility model in full section;

FIG. 3 is a schematic structural view of the heating device of the present invention;

in the figure: the heating device comprises a shell 1, a cover body 101, a discharge hole 1011, a fixing plate 102, a feed hole 1021, a motor mounting hole 1022, a screw rod 2, a motor 3, a discharge pipeline 4, internal threads 401, a heating device 5, an upper heating block 501, a lower heating block 502, a nozzle 6, a spray hole 601, a heating rod 7, an insertion hole 701, a temperature sensor 8, an induction hole 801, an adjusting hole 9, a heat dissipation device 10, a containing cavity 11, a heating channel 12, an upper semicircular groove 1201 and a lower semicircular groove 1202.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In this embodiment, as shown in the figure, the micro nozzle for the 3D printer provided in this embodiment includes a motor 3, a screw rod 2, a nozzle 6, a discharging pipeline 4 and a housing 1, where the screw rod 2 and the discharging pipeline 4 are made of metal materials, the housing 1 includes a fixing plate 102 and a cover 101, the cover 101 is fixedly disposed at one end of the fixing plate 102 by screws, a containing cavity 11 is disposed inside the cover 101, the containing cavity 1 is filled with plastic particles, the containing cavity 1 is sectioned along a front and rear symmetric central plane to form an approximate trapezoid frame, the fixing plate 102 is provided with a motor mounting hole 1022 and a feeding hole 1021, the feeding hole 1021 is disposed above the motor mounting hole 1022, a discharging hole 1011 is disposed on a left end surface of the cover 101 at a position coaxial with the motor mounting hole 1022, the motor 3 is fixedly mounted on the fixing plate 102, and an output shaft of the motor 3 extends into the containing cavity 11 through the motor mounting hole 1022 to be connected with the screw rod 2, the screw rod 2 is coaxially fixed at the tail end of an output shaft of the motor 3, a thread end of the screw rod 2 extends out of an inner hole of the discharge pipeline 4 through a discharge hole 1011, the discharge pipeline 4 is fixedly connected to the position of the discharge hole 1011 of the cover body 101 in a sealing mode, the inner hole of the discharge pipeline 4 is communicated with the accommodating cavity 11, the inner diameter of the discharge pipeline 4 is in clearance fit with the thread large diameter of the screw rod 2, an inner thread 401 is arranged on an inner hole of the discharge pipeline 4 far away from one end of the cover body 101, a nozzle 6 is connected to the section of the inner thread 401 in a threaded mode, a spray hole 601 is formed in the nozzle 6, when the nozzle 601 is completely screwed into the discharge pipeline 4, a 3-5MM clearance is reserved between the right end face of the nozzle 6 and the left end face of the screw rod 2, the section of the clearance is used for temporarily storing materials conveyed by the screw rod 2, and in order to melt plastic particles, and a heating device 5 is arranged at the position, which is close to the nozzle 6, of the discharge pipeline 4.

The heating device 5 comprises an upper heating block 501 and a lower heating block 502 which are connected together through a stud, the upper heating block 501 and the lower heating block 502 are made of metal materials with better thermal conductivity, in this embodiment, aluminum is selected, the lower end surface of the upper heating block 501 is provided with an upper semicircular groove 1201, the upper end surface of the lower heating block 502 is provided with a lower semicircular groove 1202, a round hole-shaped heating channel 12 is formed between the upper semicircular groove 1201 and the lower semicircular groove 1202, the inner diameter of the heating channel 2 is adapted to the outer diameter of the discharge pipe 4, and is coated on the outer side of the discharge pipeline 4, two insertion holes 701 are respectively arranged on the upper heating block 501 and the lower heating block 502, the heating rod 7 is arranged in the insertion holes 701, the upper heating block 501 and the lower heating block 502 can be heated by the heating rod 7, and the heat is transmitted to the discharging pipeline 4 to heat and melt the plastic particles in the discharging pipeline 4.

Further, in order to ensure the heat dissipation effect of the discharging pipeline 4 away from the end of the heating device 5, the heat dissipation device 10 is disposed on one side of the discharging pipeline 4 close to the cover body 101 in this embodiment, and the heat dissipation device 10 includes a plurality of rings of heat dissipation fins disposed on the outer ring of the discharging pipeline 4, and can dissipate heat quickly through the heat dissipation fins.

Further, in order to adjust the pressure inside the accommodating cavity 11, four adjusting holes 9 are uniformly distributed on the left end surface of the cover 101 in the present embodiment, and the four adjusting holes 9 are connected together through a pipeline and are communicated with an external air pressure adjusting valve (not shown in the figure).

Furthermore, the upper heating block 501 is provided with an induction hole 801, a temperature sensor 8 is installed in the induction hole 801, the temperature sensor 8 can detect the temperature in the heating channel 12 in real time, and can be connected with an external controller, and the temperature of the heating rod 7 can be adjusted by the controller.

The working principle is as follows: in the embodiment, at first, the feeding hole 1021 is connected with an external feeding cavity, after the communication is completed, the motor 3 starts to work to drive the screw rod 2 to rotate, the screw rod 2 rotates to drive the plastic particles in the accommodating cavity 11, the plastic particles are conveyed into the discharging pipeline 4 through threads similar to a spiral groove, and when the plastic particles pass through the heating device 5, the plastic particles are heated and melted by the heating device 5 and are ejected from the spraying holes 601 of the nozzle 6.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a micro nozzle for 3D printer which characterized in that: the device comprises a motor (3), a screw rod (2), a nozzle (6) and a shell (1), wherein the shell (1) comprises a fixing plate (102) and a cover body (101), the cover body (101) is fixedly arranged at one end of the fixing plate (102), a containing cavity (11) is arranged in the cover body (101), plastic particles are filled in the containing cavity (11), the containing cavity (11) is in a sectioning trapezoid shape along a front symmetrical central plane and a rear symmetrical central plane, a motor mounting hole (1022) and a feeding hole (1021) are formed in the fixing plate (102), a discharging hole (1011) is coaxially formed in the position, corresponding to the motor mounting hole (1022), of the cover body (101), the motor (3) is fixedly arranged on the fixing plate (102), an output shaft of the motor (3) extends into the containing cavity (11) through the motor mounting hole (1022) to be connected with the screw rod (2), and the screw rod (2) and an output shaft of the motor (3) are coaxially designed, and the one end of screw rod (2) stretches out through discharge opening (1011), the horizontal rigid coupling of discharge opening (1011) department has discharge duct (4) on the cover body (101), the internal diameter of discharge duct (4) and the big footpath clearance fit of screw thread of screw rod (2), discharge duct (4) are kept away from and are provided with internal thread (401) on the hole of the cover body (101) one end department, and threaded connection has nozzle (6) on this section internal thread (401), it has orifice (601) to open on nozzle (6), when nozzle (6) precession discharge duct (4) completely, leaves 3-5 MM's clearance between the right-hand member face of nozzle (6) and screw rod (2) left end face, discharge duct (4) are close to nozzle (6) position department and are provided with heating device (5).

2. The micro nozzle for a 3D printer according to claim 1, wherein: heating device (5) are including last heating block (501) and lower heating block (502) that link together through the double-screw bolt, and the lower terminal surface of going up heating block (501) is opened has last semicircular groove (1201), and the up end of lower heating block (502) is opened has lower semicircular groove (1202), and last semicircular groove (1201) and down constitute a round hole form heating passageway (12) between semicircular groove (1202), and the internal diameter of heating passageway (12) suits with the external diameter of ejection of compact pipeline (4), it has patchhole (701) all to open on heating block (501) and lower heating block (502), installs heating rod (7) in patchhole (701).

3. The micro nozzle for a 3D printer according to claim 1, wherein: one side of the discharge pipeline (4) close to the cover body (101) is provided with a heat dissipation device (10), and the heat dissipation device (10) comprises a plurality of circles of heat dissipation fins arranged on the outer ring of the discharge pipeline (4).

4. The micro nozzle for a 3D printer according to claim 1, wherein: four adjusting holes (9) are uniformly distributed on the left end face of the cover body (101), the adjusting holes (9) are communicated with the accommodating cavity (11), and the four adjusting holes (9) are communicated with the air pressure adjusting valve through pipelines.

5. The micro nozzle for a 3D printer according to claim 2, wherein: an induction hole (801) is formed in the upper heating block (501), and a temperature sensor (8) is installed in the induction hole (801).