KR20220014478A - Raw material extrusion device for 3d printer - Google Patents

Abstract

Provided is a raw material extrusion device for a 3D printer. The raw material extrusion device for a 3D printer may comprise: a raw material supplying part supplying a printing raw material for 3D printing; an extrusion and transfer part comprising an extrusion body part which has a receiving space therein, an extrusion screw which is provided in the receiving space to rotate and compress the printing raw material filled therein, and a discharge part which discharges the printing raw material compressed by the extrusion screw; and an extrusion control part adjusting a sealing pressure of the receiving space in response to concentration of the printing raw material, disposed between the extrusion screw and the extrusion body part, and surrounding the extrusion screw. According to the present invention, loss of the printing raw material can be prevented.

Description

Raw material extrusion device for 3D printer {RAW MATERIAL EXTRUSION DEVICE FOR 3D PRINTER}

The present invention relates to a raw material extrusion device for a 3D printer, and more specifically, by controlling the internal sealing pressure to prevent the loss of the printing raw material due to the reverse flow generated by the rotation of the screw, and to facilitate the transfer of the printing raw material and to accurately discharge the printing material It relates to a raw material extrusion device for a 3D printer that can make this possible.

In general, a 3D printer is a device for manufacturing a three-dimensional object by spraying a continuous layer of material based on a three-dimensional design created by a specific software. It is widely used in all fields of industry, such as architecture, medicine, food, etc., and is also being used for the purpose of custom-producing products with their own style and design. Depending on the type of raw material used, it may be classified into a Fused Filament Fabrication (FFF), a Fused Deposition Modeling (FDM) method, a Digital Light Processing (DLP) method, and a Selective Laser Sintering (SLS) method. Here, in the FFF and FDM methods, a solid filament may be used as a raw material, in the DLP method, a liquid raw material may be used, and in the SLS method, a raw material in a powder form may be used.

On the other hand, the direct injection (DW, Direct Writing) technique can form a pattern of a desired shape by directly controlling the position of the nozzle through the transport system while directly applying pressure to the fluid and discharging it through the nozzle.

Conventionally, the raw material may be extruded by being supplied to the nozzle by the rotation of the roller. However, due to the rotation of the roller, the raw material may flow backwards into the raw material inlet or into the upper end of the roller, resulting in loss of raw material.

That is, the loss of printing raw material may occur, and the printing raw material may be exhausted or cut off in the middle, resulting in a problem in the supply of raw materials, which may cause a problem in that it is impossible to make a precise product.

Republic of Korea Patent Registration No. 10-1502342 (March 09, 2015)

The problem to be solved by the present invention is to provide an apparatus for extruding a raw material for a 3D printer.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A raw material extrusion apparatus for a 3D printer according to an embodiment of the present invention for solving the above-described problems, a raw material supply unit for supplying a printing raw material for 3D printing; Extrusion comprising an extrusion body having a receiving space therein, an extrusion screw provided in the receiving space to rotate and compress the printing material filled therein, and a discharge unit for discharging the printing material compressed by the extrusion screw transfer unit; and an extrusion control unit that adjusts the sealing pressure of the receiving space in response to the concentration of the printing material, is disposed between the extrusion screw and the extrusion body, and surrounds the extrusion screw.

In one embodiment of the present invention, the raw material supply unit, the extruded body formed in a cylindrical shape to have a predetermined inner diameter spaced apart from the maximum outer diameter and a predetermined interval when the rotation means is rotated corresponding to the rotation means of the lower end of the extrusion screw It is disposed through the inside of the discharge transfer unit, and may be formed to be inclined downward to correspond to the traveling direction of the extrusion screw.

In one embodiment of the present invention, the extrusion control unit, at least a portion of one side is fixed to the outer surface of the upper end of the extrusion screw that is not provided with the rotating means, and at least a portion of the other side is outside the extrusion body It is fixed to the side, and the lower surface may be fixedly disposed on the upper surface of the discharge transfer unit.

In one embodiment of the present invention, the extrusion control unit, the sealing pressure control unit is rotationally coupled to the inner surface of the extrusion body portion movable vertically; an elastic member having an elastic force in the longitudinal direction corresponding to the vertical movement of the sealing pressure adjusting unit; the rotating unit disposed between the sealing pressure adjusting unit and the elastic member and rotating in response to the rotation of the sealing pressure adjusting unit; and a sealing part provided on the lower surface of the elastic member to block the movement path of the printing material.

In one embodiment of the present invention, the sealing portion, the upper surface is fixedly coupled to the lower surface of the elastic member, at least one side is fixedly coupled to the outer surface of the upper end of the extrusion screw, the other side is inside the extruded body portion a first fixing means arranged to be spaced apart from the side surface at a predetermined interval; a first sealing means fixedly coupled to a lower surface of the first fixing means and disposed with both sides of which are spaced apart from each other at a predetermined interval between the outer surface of the upper end of the extrusion screw and the inner surface of the extrusion body; The lower surface is fixedly coupled to the upper surface of the discharge transfer unit, at least one side is fixedly coupled to the inner surface of the extrusion body, and the other side is spaced apart from the outer surface of the upper end of the extrusion screw by a predetermined distance. method; and a second sealing means fixedly coupled to the upper surface of the second fixing means and disposed with both side surfaces spaced apart from each other at a predetermined interval between the outer surface of the upper end of the extrusion screw and the inner surface of the extrusion body.

In one embodiment of the present invention, the first and second sealing means may be made of the same or different materials, and the first and second fixing means may be made of the same or different materials.

In one embodiment of the present invention, when the extrusion screw rotates, when the sealing pressure control unit rotates and moves downward, the elastic member is compressed downward by the pressure of the sealing pressure control unit, and the pressure of the elastic member Thus, the first and second fixing means and the first and second sealing means may be compressed in the downward direction.

In one embodiment of the present invention, when the compression of the elastic member is fixed by the sealing pressure adjusting unit, the first sealing means and the first fixing means rotate in response to the rotation direction of the extrusion screw, The second sealing means and the second sealing means may be fixed without rotating in response to the rotation direction of the extrusion screw.

In an embodiment of the present invention, the rotating part is disposed between the first and second rotating members and a first rotating member fixedly coupled to the sealing pressure adjusting unit, a second rotating member fixedly coupled to the elastic member, and a rotation connection ring supporting the rotation unit in an axial direction, wherein the second rotation member and the elastic member may rotate in response to the rotation direction of the extrusion screw.

In one embodiment of the present invention, the raw material supply unit, composed of a cylindrical hole, the printing raw material is injected into the injection hole, the coupling member is coupled to the screw thread coupling portion; may further include.

Other specific details of the invention are included in the detailed description and drawings.

According to the present invention, by providing an extrusion control unit in the raw material extrusion device for a 3D printer, the sealing pressure inside the raw material extrusion device for a 3D printer is uniformly adjusted to block the reverse flow generated by the rotation of the screw, thereby reducing the loss of the printing raw material. can be prevented

According to the present invention, by providing an extrusion control unit in the raw material extrusion device for a 3D printer, a uniform force is transmitted to the inside of the raw material extrusion device for a 3D printer by the extrusion control unit, thereby smoothing the transfer of the printing material and precise ejection This makes it possible to manufacture precise products.

According to the present invention, by providing an extrusion control unit in the raw material extrusion device for a 3D printer, the sealing pressure inside the raw material extrusion device for a 3D printer is adjusted according to the concentration of the printing material by the extrusion control unit to facilitate the transfer of the printing material This enables precise dispensing to produce precise products.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a view for explaining an apparatus for extruding a raw material for a 3D printer according to an embodiment of the present invention.
FIG. 2 is a partially cutaway schematic perspective view of the extrusion control unit shown in FIG. 1 .
FIG. 3 is a view for explaining the raw material supply unit shown in FIG. 1 .
4 and 5 are views for explaining the operation of the raw material extrusion apparatus for a 3D printer.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully understand the scope of the present invention to those skilled in the art, and the present invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components in addition to the stated components. Like reference numerals refer to like elements throughout, and "and/or" includes each and every combination of one or more of the recited elements. Although "first", "second", etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may be the second component within the spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein will have the meaning commonly understood by those of ordinary skill in the art to which this invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless specifically defined explicitly.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining an apparatus for extruding a raw material for a 3D printer according to an embodiment of the present invention, FIG. 2 is a partially cutaway schematic perspective view of the extrusion control unit shown in FIG. 1, and FIG. 3 is the raw material shown in FIG. It is a view for explaining the supply unit, and Figures 4 and 5 are views for explaining the operation of the raw material extrusion device for a 3D printer.

1 and 2, the raw material extrusion apparatus 1 for a 3D printer according to an embodiment of the present invention is supplied through a raw material supply unit 10, a raw material supply unit 10 for supplying printing raw materials for 3D printing. It may include an extrusion transfer unit 20 for extruding and discharging the received printing material by the extrusion screw 24 and an extrusion control unit 30 for adjusting the sealing pressure of the receiving space in response to the concentration of the printing material. In this case, the raw material extrusion apparatus 1 for the 3D printer may include a driving motor for generating rotational power.

According to an embodiment, the raw material extrusion apparatus 1 for a 3D printer may include a control unit (not shown) for controlling the operation of the raw material extrusion apparatus for a 3D printer, but is not limited thereto.

The raw material supply unit 10 is a hopper for supplying a printing raw material for 3D printing, and in this embodiment, a liquid raw material, for example, a viscous fluid material such as a ceramic paste, is disclosed, but is not limited thereto.

The raw material supply unit 10 includes an outlet 12 and an inlet 14 and may be configured as a cylindrical hole.

The outlet 12 penetrates the inside of the extrusion body 22 of the extrusion transfer unit 20 to supply a printing raw material to the receiving space of the extrusion transfer unit 20 . At this time, the raw material supply unit 10 may be formed to be inclined downward to correspond to the moving direction of the extrusion screw 24 . Accordingly, the outlet 12 may be formed so as to be in contact with the vertical surface of the inner surface of the extruded body 22 , that is, the supply hole 220 and downward inclined.

The injection port 14 may receive a printing raw material from the outside.

According to an embodiment, the injection hole 14 may include a screw thread coupling portion 140 to which the coupling member 16 is coupled.

For example, referring to FIG. 3 , the coupling member 16 of the one-touch type tube may be coupled to the screw thread coupling unit 140 in a threaded manner.

The raw material supply unit 10 having such a configuration is formed to be inclined downward toward the discharge unit 26 , so that the feed flow of the printing material can be smoothly discharged in response to the rotation of the extrusion screw 24 .

The extrusion transfer unit 20 includes an extrusion body 22 having a receiving space therein, an extrusion screw 24 provided in the receiving space and rotating and compressing the printing raw material filled therein, and the extrusion screw 24. It may include a discharge unit 26 for discharging the compressed printing material.

The extrusion body 22 may include a supply hole 220 , a discharge transfer unit 222 , and an inner rotation coupling unit 224 .

The supply hole 220 is a hole formed by the outlet 12 of the raw material supply unit 10 , and may be formed to correspond to the outlet 12 of the raw material supply unit 10 .

In the inner accommodation space, the discharge transfer unit 222 may be formed in a cylindrical shape by being spaced apart from the rotating unit 240 by a predetermined distance to correspond to the rotating unit 240 of the extrusion screw 24 . That is, the discharge transfer unit 222 may be formed in a cylindrical shape having a predetermined inner diameter spaced apart from the maximum outer diameter when the rotation means 240 is rotated.

In the present embodiment, the discharge transfer unit 222 may be formed to correspond to the formation position of the raw material supply unit 10 . Accordingly, the supply hole 220 may be formed on the inner surface of the discharge transfer unit 222 . The inner rotation coupling portion 224 is to be formed on the upper surface of the inner surface 226 of the extrusion body portion 22 . can That is, the inner rotation coupling portion 224 may be formed to correspond to the sealing pressure adjusting portion 32 to be described later. At this time, the sealing pressure of the receiving space may be adjusted according to the rotational coupling depth of the inner rotation coupling part 224 .

The extrusion screw 24 may include a rotating means 240 composed of a single screw or two or more screws.

The rotating means 240 may be formed to correspond to the discharge transfer unit 222 .

The extrusion transfer unit 20 having such a configuration may extrude the printing material supplied through the raw material supply unit 10 by the extrusion screw 24 .

The extrusion control unit 30 may include a sealing pressure control unit 32 , a rotation unit 34 , an elastic member 36 , and a sealing unit 38 .

The sealing pressure adjusting unit 32 may include an outer rotating coupling unit 320 that is rotationally coupled to the inner surface 226 of the extruded body 22 . That is, the sealing pressure adjusting unit 32 is rotationally coupled to the inner rotation coupling part 224 and the outside rotation coupling part 320 of the extruded body part 22 so that it can easily move up and down.

The rotating unit 34 is disposed between the sealing pressure adjusting unit 32 and the elastic member 36 , and may rotate in response to the rotation of the sealing pressure adjusting unit 32 .

Here, the rotating part 34 includes a first rotating ring 340 fixedly coupled to the lower surface of the sealing pressure adjusting unit 32 , a second rotating ring 344 fixedly coupled to the upper surface of the elastic member 36 , and a second A rotation connection ring 342 disposed between the first rotation ring 340 and the second rotation ring 344 may be included. At this time, it is possible to minimize friction during rotation of the sealing pressure adjusting unit 32 by the rotation connecting ring 342 .

On the other hand, when the sealing pressure adjusting unit 32 moves up and down, the rotating unit 34 rotates according to the rotation, but when the sealing pressure adjusting unit 32 rotates while the sealing pressure adjusting unit 32 is fixed, the sealing pressure The adjusting unit 32 and the first rotating ring 340 may not rotate in response to the rotation direction of the extrusion screw 24 .

Friction generated between the sealing pressure adjusting unit 32 and the elastic member 36 may be minimized by the rotating unit 34 having such a structure, and a uniform force may be transmitted to the sealing unit 38 .

The elastic member 36 is a member having an elastic force in the longitudinal direction in response to vertical movement of the sealing pressure adjusting unit 32 , and is disclosed as a compression spring in the present embodiment, but is not limited thereto.

Here, the elastic member 36 may be disposed so that a portion of the inner rotation coupling portion 224 overlaps.

The sealing part 38 is provided between the outer surface of the upper end 242 of the extrusion screw 24 and the inner surface 226 of the extrusion body 22 to block the movement path of the printing material. Here, the sealing part 38 may not be overlapped with the inner rotation coupling part 224 .

Specifically, the sealing part 38 may include a first fixing means 380 , a first sealing means 382 , a second sealing means 384 , and a second fixing means 386 .

The first fixing means 380 has an upper surface fixedly coupled to the lower surface of the elastic member 36, and at least one side is fixed to the outer surface of the upper end 242 where the rotation means 240 of the extrusion screw 24 is not provided. It is coupled, and the other side may be disposed to be spaced apart from the inner surface 226 of the extruded body 22 at a predetermined interval. At this time, the first fixing means 380 is fixedly coupled to the outer surface of the upper end 242 where the rotation means 240 of the extrusion screw 24 is not provided, so as to be rotated corresponding to the rotation direction of the extrusion screw 24 . can That is, regardless of whether or not the sealing pressure adjusting unit 32 is fixed, it can be rotated corresponding to the rotational direction of the extrusion screw 24 .

This first fixing means 380 may be made of a flexible material. For example, it may be made of a material having excellent sealing properties, such as a rubber material. In addition, the first fixing means 380 may fix and support the first sealing means 382 .

The first sealing means 382 is fixedly coupled to the lower surface of the first fixing means 380, both sides of which are the outer surface of the upper end 242 of the extrusion screw 24 and the inner surface 226 of the extrusion body 22. It may be disposed to be spaced apart from each other at a predetermined interval. At this time, the first sealing means 382 is fixedly coupled to the lower surface of the first fixing means 380 , so that it can rotate in response to the rotational direction of the first fixing means 380 .

The first sealing means 382 may be made of a material resistant to friction and abrasion. For example, as a material that has a fine abrasive surface and thus has excellent sealing power and resists abrasion well, alumina ceramic and carbon set or Teflon (PTFE) and ceramic (alumina, etc.) set together with a second sealing means 384 to be described later It may consist of at least one set among a plurality of sets consisting of, but is not limited thereto.

The second sealing means 384 is fixed to the upper surface of the second fixing means 386 , and both sides are between the outer surface of the upper end 242 of the extrusion screw 24 and the inner surface 226 of the extrusion body 22 . may be spaced apart from each other at a predetermined interval. At this time, the second sealing means 384 may be fixedly coupled to the upper surface of the discharge transfer unit 222 , thereby being fixed without being rotated in response to the rotational direction of the extrusion screw 24 .

This second sealing means 384 may be made of the same material as the first sealing means 382 and resistant to friction and abrasion, but is not limited thereto. For example, at least one set of a plurality of sets consisting of alumina ceramic and carbon set or Teflon (PTFE) and ceramic (alumina, etc.) It may consist of, but is not limited thereto.

The second fixing means 386 has a lower surface fixedly coupled to the upper surface of the discharge transfer unit 222, at least one side is fixedly coupled to the inner surface 226 of the extrusion body 22, and the other side is an extrusion screw ( 24) may be disposed to be spaced apart from the upper end 242 at a predetermined interval. At this time, the second fixing means 386 is fixedly coupled to the inner surface 226 of the extrusion body 22 , so that it can be fixed without being rotated in response to the rotation direction of the extrusion screw 24 .

This second fixing means 386 may be made of the same flexible material as the first fixing means 380, but is not limited thereto. For example, it may be made of a material having excellent sealing properties, such as a rubber material. In addition, the second fixing means 386 may fix and support the second sealing means 384 .

The extrusion control unit 30 having such a configuration may adjust the sealing pressure of the accommodation space in response to the concentration of the printing material compressed by the extrusion transfer unit 20 .

For example, when the concentration of the printing raw material is high, as shown in FIG. 4 , the sealing pressure adjusting part 32 is rotated so that the printing raw material is smoothly transferred and precisely discharged to the inner side of the extrusion body part 22 . The rotational coupling part 224 and the outer rotational coupling part 320 are rotationally coupled to move downward, and the elastic member 36 is compressed downward by the lower movement of the sealing pressure adjusting part 32, and the elastic member 36 ), the first sealing means 382 fixed to the first fixing means 380 and the second sealing means 384 fixed to the second fixing means 386 may come into contact with each other by compression. Accordingly, it is possible to block the movement path of the printing raw material leaving the upper part, and to adjust the sealing pressure of the accommodation space uniformly. At this time, strong pressing is generated by the compression of the elastic member 36 on the first sealing means 382 and the second sealing means 384 , so that there is a gap between the first sealing means 382 and the second sealing means 384 . By not forming this, the sealing force becomes stronger and the movement path of the printing raw material can be blocked to the upper part.

On the other hand, when the concentration of the printing raw material is low, as shown in FIG. 5 , the sealing pressure adjusting part 32 is fixed to the upper part so that the printing raw material is smoothly transferred and precise ejection is made, and the The second rotating ring, the elastic member 36, the first fixing means 380 and the first sealing means 382 may rotate in response to the rotation direction. At this time, the second sealing means 384 and the second fixing means 386 fixed to the inner surface 226 of the extruded body 22 may not rotate. At this time, the first sealing means 382 and the second sealing means 384 are weakly pressed by the compression of the elastic member 36 , so that there is a gap between the first sealing means 382 and the second sealing means 384 . may not be formed.

The control unit may operate the raw material extruding device 1 for 3D printer according to a user's manual operation or a control signal to control the driving of the raw material extruding device 1 for 3D printer.

The operation of the raw material extrusion apparatus for a 3D printer according to an embodiment of the present invention having such a structure is as follows.

In the raw material extrusion device 1 for a 3D printer, the printing raw material supplied from the raw material supply unit 10 is compressed by the rotation of the extrusion screw 24, and in response to the concentration of the printing raw material by the extrusion control unit 30, the receiving space 3D printing is possible by controlling the sealing pressure to facilitate the transfer of the printing material through the discharge unit 26 to enable precise discharge.

As described above, when the concentration is high, the first sealing means 382 and the second sealing means 384 are pressed by rotating the sealing pressure adjusting unit 32 to move downward to strengthen the compression of the elastic member 36 . to block the movement path of the printing material leaving the upper part by strengthening the

In addition, when the concentration is low, the sealing pressure adjusting unit 32 is rotated to move upward to weaken the compression of the elastic member 36, thereby weakening the pressing of the first sealing means 382 and the second sealing means 384. It is possible to block the movement path of the printing material leaving the upper part, and to adjust the sealing pressure of the receiving space uniformly.

In addition, friction generated between the sealing pressure adjusting unit 32 and the elastic member 36 is minimized by the rotating unit 34 positioned between the sealing pressure adjusting unit 32 and the elastic member 36, and the sealing unit ( 38), a uniform force can be transmitted.

The steps of a method or algorithm described in relation to an embodiment of the present invention may be implemented directly in hardware, as a software module executed by hardware, or by a combination thereof. A software module may include random access memory (RAM), read only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, hard disk, removable disk, CD-ROM, or this It may reside in any type of computer-readable recording medium well known in the art.

As mentioned above, although embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains know that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

1: Raw material extrusion device for 3D printer
10: raw material supply unit 20: extrusion transfer unit
30: extrusion control unit

Claims (10)

a raw material supply unit for supplying printing raw materials for 3D printing;
Extrusion comprising an extrusion body having a receiving space therein, an extrusion screw provided in the receiving space to rotate and compress the printing material filled therein, and a discharge unit for discharging the printing material compressed by the extrusion screw transfer unit; and
A raw material for a 3D printer comprising; an extrusion control unit that adjusts the sealing pressure of the receiving space in response to the concentration of the printing material, is disposed between the extrusion screw and the extrusion body, and is formed by surrounding the extrusion screw extrusion device. According to claim 1,
The raw material supply unit,
In response to the rotation means of the lower end of the extrusion screw, when the rotation means is rotated, it is spaced apart from the maximum outer diameter by a predetermined interval and is disposed through the inside of the discharge transfer part of the extrusion body formed in a cylindrical shape to have a predetermined inner diameter, the extrusion A raw material extrusion device for a 3D printer, which is inclined downward to correspond to the direction of the screw. 3. The method of claim 2,
The extrusion control unit,
At least a portion of one side is fixed to the outer surface of the upper end of the extrusion screw that is not provided with the rotating means, and at least a portion of the other side is fixed to the outer surface of the extrusion body, and the lower surface is on the upper surface of the discharge transfer unit. A raw material extrusion device for a 3D printer, which is fixedly arranged. 4. The method of claim 3,
The extrusion control unit,
a sealing pressure adjusting unit which is rotationally coupled to the inner surface of the extruded body and is movable up and down;
an elastic member having an elastic force in the longitudinal direction corresponding to the vertical movement of the sealing pressure adjusting unit;
the rotating unit disposed between the sealing pressure adjusting unit and the elastic member and rotating in response to the rotation of the sealing pressure adjusting unit; and
A material extrusion device for a 3D printer, including a; is provided on the lower surface of the elastic member to block the movement path of the printing material. 5. The method of claim 4,
The sealing part,
The upper surface is fixedly coupled to the lower surface of the elastic member, at least one side is fixedly coupled to the outer surface of the upper end of the extrusion screw, and the other side is a first fixing means arranged to be spaced apart from the inner surface of the extruded body by a predetermined distance ;
a first sealing means fixedly coupled to a lower surface of the first fixing means and disposed with both sides of which are spaced apart from each other at a predetermined interval between the outer surface of the upper end of the extrusion screw and the inner surface of the extrusion body;
The lower surface is fixedly coupled to the upper surface of the discharge transfer unit, at least one side is fixedly coupled to the inner surface of the extrusion body, and the other side is spaced apart from the outer surface of the upper end of the extrusion screw by a predetermined distance. method; and
A second sealing means fixedly coupled to the upper surface of the second fixing means, both sides of which are spaced apart from each other at a predetermined interval between the outer surface of the upper end of the extrusion screw and the inner surface of the extruded body; Raw material extrusion equipment. 6. The method of claim 5,
The first and second sealing means are made of the same or different materials from each other,
The first and second fixing means are made of the same or different materials from each other, a raw material extrusion device for a 3D printer. 6. The method of claim 5,
When the extrusion screw rotates, when the sealing pressure control unit rotates and moves downward, the elastic member is compressed downward by the pressure of the sealing pressure control unit, and the first and second fixing units are fixed by the pressure of the elastic member means and the first and second sealing means are compressed in the downward direction, the raw material extrusion apparatus for a 3D printer. 6. The method of claim 5,
When the compression of the elastic member is fixed by the sealing pressure adjusting unit,
The first sealing means and the first fixing means rotate in response to the rotation direction of the extrusion screw,
The second sealing means and the second sealing means are fixed without rotating in response to the rotational direction of the extrusion screw, a raw material extrusion device for a 3D printer. 9. The method of claim 8,
The rotating part is disposed between a first rotating member fixedly coupled to the sealing pressure adjusting unit, a second rotating member fixedly coupled to the elastic member, and the first and second rotating members to rotate to support the rotating unit in an axial direction. including a connecting ring;
The second rotating member and the elastic member rotate in response to the rotation direction of the extrusion screw, a raw material extrusion device for a 3D printer. According to claim 1,
The raw material supply unit,
Consisting of a cylindrical hole, a screw thread coupling part to which a coupling member is coupled to the injection hole into which the printing material is injected; further comprising, a raw material extrusion device for a 3D printer.

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