KR20020087250A - Three-dimensional printer - Google Patents

Abstract

PURPOSE: A three-dimensional printer is provided to reduce size of system by arranging a powder feed unit to a slider, while preventing deformation of sample product and achieving uniform distribution of powder. CONSTITUTION: A three-dimensional printer comprises a working unit(110) for production of sample product of three-dimensional shape; a pair of first guide bars(120) installed above the work unit; a slider(130) moving in forward and rearward directions along the pair of first guide bars; a driving unit for moving the slider along the first guide bar; a powder feed unit(210) installed to the slider, and which feeds powder to the surface of the work unit; a smoothing head unit(220) arranged in the vicinity of the powder feed unit, and which smooths powder fed by the powder feed unit; and a binder injection unit(230) arranged in the vicinity of the smoothing head unit, and which moves, along a second guide bar(231), in the direction perpendicular to the advance direction of the slider, and injects binder at the smoothed surface of the work unit.

Description

3D Printer Unit {THREE-DIMENSIONAL PRINTER}

The present invention relates to a three-dimensional printer device, and more specifically, it does not deform the sculptures produced during powder supply, can evenly distribute the powder on the whole work surface, and spray the binder immediately after supplying and smoothing the powder The present invention relates to a three-dimensional printer device that can shorten the working time.

In general, in order to produce a prototype having a three-dimensional solid shape, there are a wood-based production method made by hand and a manufacturing method by CNC milling, etc., depending on the drawings. However, the mock-up manufacturing method is difficult by elaborate numerical control and takes a lot of time because of manual work, and the manufacturing method by CNC milling is capable of precise numerical control, but many shapes are difficult to process by tool interference. Therefore, in recent years, a so-called three-dimensional printer method has emerged, in which a prototype of a three-dimensional three-dimensional shape is manufactured using a computer storing data generated by three-dimensional modeling created by a designer and a designer of a product.

In this three-dimensional printer method, SLA (StereoLithograhhic Apparatus) using the principle that the laser beam is irradiated to the photocurable resin is cured, and a functional polymer or metal powder is used instead of the photocurable resin in the SLA. Selective Laser Sintering (SLS) using the principle of scanning, solidifying and molding, and LOM (Laminated Object Manufacturing) for cutting and laminating the paper coated with adhesive to the desired cross section by laminating it with laser beam. And Ballistic Particle Manufacturing (BPM) using Ink-Jet printer technology.

In particular, the BPM method is suitable for making a sculpture having a complex and sophisticated three-dimensional shape unlike other methods using a laser.

1 is a front view schematically showing a three-dimensional printer device using a conventional inkjet printer technology. As shown, the powder supply unit 20 for supplying the powder 11, the work unit 30 is supplied to the powder 11 from the powder supply unit 20 to produce a prototype having a three-dimensional shape, and the powder supply unit Slidingly coupled to a pair of first guide bar 60 installed in the working direction on the upper end of the 20 and the working part 30 is moved by a driving unit (not shown) and the lower part from the powder supply part 20 to the working part ( 30 and a slider 40 having a smoothing head 41 for smoothing the working surface of the work part 30 and conveying the powder 11, and a direction perpendicular to the working direction on one side of the slider 40. It is coupled to the second guide bar 51 formed by the movement means (not shown) is composed of a binder spraying unit 50 for spraying a binder (binder).

The powder supply unit 20 forms a supply chamber 21 for storing the powder 11, installs a supply plate 22 in the lower part of the supply chamber 21, and then the powder 11 is filled in the supply chamber 21. . The supply plate 22 has a first vertical movement shaft 23 coupled to a lower surface thereof, and a first operating means (not shown) such as a motor or a hydraulic cylinder is mechanically attached to a lower end of the first vertical movement shaft 23. Are combined. Therefore, while the supply plate 22 is raised by a certain height by the first operating means, the powder 11 is raised above the working surface of the powder supply part 20. The powder 11 raised above the work surface of the powder supply part 20 is transferred to the work part 30 by the smoothing head 41 of the slider 40.

The work part 30 forms the work room 31 which manufactures the prototype 70 of a three-dimensional shape, and the work plate 32 is installed in the lower part of this work room 31. The work plate 32 is coupled to the lower surface of the second vertical movement shaft 33, the second operation means (not shown) such as a motor, a hydraulic cylinder is mechanically attached to the lower end of the second vertical movement shaft 33 Are combined. Therefore, when the work plate 32 is lowered by a certain height by the second operating means, the smoothing head 41 and the binder spraying unit 50 stack and solidify the layers at a constant height to produce a three-dimensional prototype.

Slider 40 is coupled to the pair of first guide bar 60 installed in the working direction on the upper end of the powder supply unit 20 and the work unit 30 and the first guide bar 60 by the drive unit (not shown) It is moved to the guide, the lower side is provided with a smoothing head 41 for smoothing and transporting the powder 11, which is raised from the powder supply unit 20 to the work unit 30 when moving in the working direction by the drive unit, On one side, a binder spraying unit 50 is provided.

The binder spraying unit 50 is coupled to a second guide bar 51 formed on one side of the slider 40 in a direction orthogonal to the working direction, and guided to the second guide bar 51 to move the vehicle (not shown). It consists of a binder sprayer 52 which moves by and sprays a binder.

The binder injector 52 divides the stored three-dimensional shape into respective layers and outputs a cross-sectional shape corresponding to the divided layer to output a binder on the smooth working surface of the work unit 30 by a control signal of a computer (not shown). Spray 12. The principle of spraying the binder 12 by the binder sprayer 52 is the same as that of the inkjet printer.

2A to 2C are cross-sectional views illustrating a process of manufacturing a prototype having a three-dimensional shape in a working part of the conventional three-dimensional printer device shown in FIG. 1.

As shown in FIG. 2A, the smoothing head of the slider 40 is driven by the driving unit of the powder 11 protruding upward of the powder supply unit 20 by the supply plate 22 raised to a certain height by the first operating means. 41 is smoothed at the same time while conveying on the working surface of the work part 30. When the smoothing operation is completed, the slider 40 is moved to the original position by the drive unit. The slider 40 moved to its original position is moved back to the work surface of the work part 30 as shown in FIG. 2B, and the binder sprayer 52 has a cross-sectional shape corresponding to each layer generated in the three-dimensional modeling. Controlled by a computer storing data, printing is performed with the binder 12 on the work surface.

Meanwhile, when the binder 12 is sprayed on the particles of the powder 11, the particles of the powder 11 are solidified, and when the particles of the powder 11 are solidified in a desired shape, the work plate 32 of the work part 30 is fixed. Descend to depth. By repeating the operation as shown in Figure 2a and 2b on the lowered working surface to form a working layer, the respective working layers are combined with each other to produce a prototype 70 of the three-dimensional shape as shown in FIG.

However, the conventional three-dimensional printer device as described above has the following problems.

First, since the powder supply part is located on the side of the work part, the volume of the equipment is increased, and when the powder is moved from the powder supply part to the work part by the smoothing head, it is difficult to distribute the powder evenly over the work space. have.

Second, since the smoothing head is located in the reverse direction of the working direction than the binder injector, after the powder transfer and smoothing work is finished, the binder sprayer moves to the original position with the slider and then sprays the binder while moving in the working direction again. It is consumed more than twice and the smoothing head is moved over the smooth working surface when the binder is sprayed there is a problem causing damage to the smoothed surface.

The present invention is to solve the above-mentioned conventional problems, the object of the present invention is to reduce the volume of the device can be miniaturized, do not deform the prototype during the powder supply, evenly spread the powder on the entire work surface It is to provide a three-dimensional printer device that can be distributed.

Another object of the present invention is that the powder feeder is located on the opposite side of the process progress direction of the smoothing head to spray the binder immediately after the supply and smoothing of the powder to shorten the working time, the surface smoothed by the smoothing head during the binder spraying It is to provide a three-dimensional printer device for preventing damage.

The present invention for realizing the above object is a working unit for producing a three-dimensional prototype; A pair of first guide bars installed on an upper portion of the working part; A slider that moves back and forth along the pair of first guide bars; A drive unit for moving the slider along the first guide bar; A powder supply part installed on the slider and supplying powder to a work surface of the work part; A smoothing head portion installed adjacent to the rear of the powder supply portion on the slider and smoothing the powder supplied by the powder supply portion; It is installed adjacent to the back of the smoothing head portion on the slider, characterized in that it comprises a binder spraying portion for spraying the binder on the smooth working surface while moving in a direction orthogonal to the direction of travel of the slider along the second guide bar.

1 is a front view schematically showing a three-dimensional printer device using a conventional inkjet printer technology,

2a to 2c is a cross-sectional view showing a process for manufacturing a three-dimensional prototype in the working portion of the conventional three-dimensional printer device shown in FIG.

3 is a perspective view showing a three-dimensional printer device according to the present invention,

4 is a cross-sectional view of the three-dimensional printer device according to the present invention shown in FIG.

5 is a cross-sectional view showing a powder supply unit of the three-dimensional printer device according to the invention shown in FIG.

6A and 6B are sectional views showing the smoothing head portion of the three-dimensional printer device according to the present invention shown in FIG.

<Explanation of symbols for the main parts of the drawings>

110; Working part 120; 1st guide bar

130; Slider 210; Powder supply part

211; Powder storage containers 212; Powder Supply Pan

220; Smoothing head portion 221; Combined groove

222; Solenoid 223; Smooth head

230; Binder injection unit 231; 2nd guide bar

232; Binder injector 233; Joining member

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

As described above, according to a preferred embodiment of the present invention, as shown in a perspective view showing a three-dimensional printer device according to the present invention of Figure 3, the working part 110 and the working part (100) where a prototype of a three-dimensional shape is manufactured; The first guide bar 120 includes a pair of first guide bars 120 installed at an upper portion of the 110, a slider 130 moving back and forth along the pair of first guide bars 120, and a slider 130. The driving unit 140 moving along the 120, the powder supply unit 210 is installed on the slider 130 and supplies the powder 11 to the working surface of the working unit 110, and the powder supply unit on the slider 130 It is installed adjacent to the rear of the 210 and the smoothing head portion 220 to smooth the powder 11 supplied by the powder supply unit 210, and adjacent to the rear of the smoothing head portion 220 on the slider 130 And is moved along the second guide bar 231 in a direction perpendicular to the advancing direction of the slider 130. Consists of a binder spraying unit 230 for spraying the binder 12 to the active working surface.

4 is a cross-sectional view showing the front of the three-dimensional printer device according to the present invention shown in FIG. As shown, the working portion 110 forms a working chamber 111 in which a prototype having a three-dimensional shape is manufactured inward, and a work plate 112 is mounted at a lower portion thereof, and a vertical portion is formed at the lower portion of the work plate 112. A feed shaft 113 is installed, and an operating means (not shown) such as a motor, an inflow cylinder, and the like are mechanically coupled to the vertical feed shaft 113. Therefore, the working plate 112 is moved vertically by the operating means.

A plurality of first guide bars 120 formed in the working direction is installed on the upper portion of the work part 110, and FIG. 3 shows that the plurality of first guide bars 120 are installed in two. Both ends of the slider 130 formed in the first direction and the orthogonal direction of the first guide bar 120 are slidably coupled to the first guide bar 120, respectively, and the slider 130 coupled to the first guide bar 120. ) Is guided and moved to the first guide bar 120 by the driving unit 140.

The driving unit 140 for driving the slider 130 is connected to the rotary pulley 141 and the shaft 142a of the motor 142, respectively, installed at a predetermined place by a belt 143, and the belt 143 is a slider ( One end of 130). Therefore, the slider 130 moves in the working direction or the direction opposite to the working direction by the rotation of the motor 142.

One side of the slider 130 is coupled to the powder supply unit 210 for supplying the powder 11 to the working surface of the working unit 110. As shown in the cross-sectional view showing a powder supply unit of the three-dimensional printer device according to the present invention of Figure 5, it is composed of a powder storage container 211, a powder supply pan 212, and a rotary drive (not shown).

The powder storage container 211 is a container having a cylindrical shape that is coupled to one side of the slider 130 and stores the powder 11 and forms a supply groove 211a in the longitudinal direction on the lower side.

The powder supply pan 212 having a plurality of wings 212a is coupled to the inside of the powder storage container 211, and the powder supply pan 212 is rotated by a rotation driving unit.

The rotary drive unit is preferably formed by extending the rotary shaft at one end of the powder supply fan 212, for example, by having a motor connected to the belt by the rotary shaft, thereby rotating the powder supply fan 212 by the rotational force of the motor. . Therefore, the powder 11 stored in the powder storage container 211 by the rotation of the powder supply pan 212 is supplied to the working surface of the working unit 110 through the supply groove 211a.

On the other hand, the inlet 211b is formed to inject powder into the powder storage container 211, the stopper 211c is coupled to the inlet 211b can be easily opened and closed the inlet 211b.

The powder 11 supplied to the working surface of the working part 110 is smoothed by the smoothing head part 220 installed adjacent to the back of the powder supply part 210 on the slider 130 as soon as it is supplied. For example, the smoothing head part 220 forms a coupling groove 221 in the lower side of the slider 130, as shown in the cross-sectional view of the smoothing head part of the three-dimensional printer device according to the present invention of FIG. The solenoid 222 having the post 222a is mounted on the coupling groove 221 and the smoothing head 223 having the upper end 223a coupled to the post 222a of the solenoid 222 is coupled to the coupling groove 221. 221 may be slidingly coupled. In order to couple the upper end 223a of the smoothing head 223 to the post 222a of the solenoid 222, a groove 222b is formed at the end of the post 222a, and the groove corresponding to the groove 222b is smoothed. It may be formed on the upper end 223a of the 223 to be coupled to each other.

Therefore, as shown in FIG. 6A, when the slider 130 proceeds in the working direction by the driving unit, the solenoid 222 protrudes the post 222a to lower the smoothing head 223. At this time, the lowering position of the smoothing head 223 is positioned on the working surface to smooth the powder 11 supplied on the working surface of the working part 110.

In addition, as shown in FIG. 6B, the solenoid 222 raises the smoothing head 223 by inserting the post 222a when the slider 130 is returned to its original position by the driving unit. Therefore, after completion of the spraying operation of the binder 12 to be described later, the smoothing head 223 rises to a certain height from the working surface on which the spraying operation of the binder 12 is completed at the original position for the next operation so that the working surface is not damaged.

On the working surface smoothed by the smoothing head part 220, the binder 12 which sprays the particles of the powder 11 is injected by the binder spraying part 230. The binder spraying unit 230 is formed side by side in the longitudinal direction of the slider 130, the binder spraying machine 232 is coupled to the second guide bar 231, both ends of which are coupled to the slider 130. The binder sprayer 232 slides the second guide bar 231 to the guide hole by using a coupling member 233 having a guide hole at one end for coupling with the second guide bar 231, and the second guide. The binder sprayer 232 may be coupled to one side of the coupling member 233 coupled to the bar 231.

On the other hand, the binder sprayer 232 is provided with a moving means to be guided and moved to the second guide bar 231, the moving means is a binder sprayer 232 to the belt connected to the shaft of the pulley and the motor installed at a predetermined position, for example Connect the binder sprayer 232 can be moved by the rotation of the motor.

The binder spraying machine 232 divides the stored three-dimensional shape into respective layers and outputs a cross-sectional shape corresponding to the divided layer on the smooth working surface of the work unit 110 by a control signal of a computer (not shown). The binder 12 is sprayed. The principle of spraying the binder 12 by the binder injector 232 is the same as that of the inkjet printer.

The slider 130 is returned to its original position by the drive unit when the operation of one layer is completed by spraying the binder 12 on the working surface by the binder sprayer 232 to solidify the particles of the powder 11 sprayed. At this time, the work plate 111 coupled to the lower part of the work unit 110 is lowered down by a certain length, and the work is repeatedly performed in the order of supply of powder, smoothing and spraying of the binder to stack the respective working layers. At the same time, the three-dimensional prototype 70 (shown in FIG. 2) is manufactured by being bonded to each other.

As described above, in the present invention, the powder supply part is provided in the slider to reduce the volume of the system and evenly distribute the powder on the entire working surface without deforming the prototype being produced during the powder supply, the powder according to the working progress direction By placing the feeder, the smoothing head, and the binder sprayer in order, the binder can be sprayed immediately after the powder is fed and smoothed, thereby shortening the working time.

As described above, the three-dimensional printer device according to the present invention

First, the powder supply part is provided in the slider to reduce the volume of the system and does not deform the prototype being produced when the powder is supplied, and has the effect of evenly distributing the powder evenly on all the working surfaces,

Second, by placing the powder supply part, the smoothing head and the binder spraying part according to the work progress direction, the binder can be sprayed immediately after the powder supply and smoothing, which shortens the working time, and the working surface is damaged by the smoothing head when the binder is sprayed. It has the effect of preventing it.

What has been described above is only one embodiment for implementing a three-dimensional three-dimensional printer device according to the present invention, the present invention is not limited to the above embodiment, as claimed in the following claims of the present invention Without departing from the gist of the present invention, one of ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (3)

In the three-dimensional printer device, A work part in which a three-dimensional prototype is manufactured; A pair of first guide bars installed on an upper portion of the work part; A slider moving back and forth along the pair of first guide bars; A driving unit to move the slider along the first guide bar; A powder supply part installed at the slider and supplying powder to a working surface of the work part; A smoothing head part disposed adjacent to the rear of the powder supply part on the slider and smoothing the powder supplied by the powder supply part; It is installed adjacent to the rear of the smoothing head portion on the slider, and comprises a binder spraying portion for spraying a binder on a smooth working surface while moving in a direction orthogonal to the traveling direction of the slider along a second guide bar 3D printer device. The method of claim 1, wherein the powder supply unit, A cylindrical powder storage container having a feeding groove formed at a lower side thereof in a longitudinal direction, and having an opening for opening and closing with a stopper so as to inject the powder therein; A powder supply fan installed inside the powder storage container and having a plurality of wings; Three-dimensional printer device characterized in that consisting of a rotary drive for rotating the powder supply pan. The method of claim 1, wherein the smoothing head portion, A smoothing head for smoothing the powder supplied from the powder supply part to the work part; Three-dimensional printer device characterized in that consisting of a solenoid for moving the smoothing head up and down.