KR101646773B1 - 3D printer - Google Patents

Abstract

The present invention relates to an apparatus for machining a three-dimensionally formed article. According to an embodiment of the present invention, a 3D printer comprises: a chamber unit for shape machining; a raw material supplying unit inserting a raw material having a power shape into the chamber unit; a raw material moving unit enabling the raw material to continue to be supplied, and pushing and moving the raw material inserted by the raw material supplying unit; a forming unit forming the raw material moved by the raw material moving unit; a laser machining unit fusing and forming the raw material by irradiating a laser beam to the raw material seated on the forming unit; and a control unit controlling the forming unit to be lowered after the laser machining unit machines a single line so as to machine an overall three-dimensionally formed article.

Description

3D printer {3D printer}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional printer for producing a three-dimensional molded article, and more particularly to a three-dimensional printer for producing a three-dimensional molded article using a metal powder as an object to be molded.

Conventionally, conventional processing methods such as casting and forging have been used to produce three-dimensional molded articles. Also, in order to maintain the quality of the product when using such a manufacturing method, a skilled worker had to perform it.

In recent years, three-dimensional printers have begun to be used as apparatuses for processing three-dimensional molded products. 3D printers are gradually replacing traditional processing methods because of the advantage that non-specialists can easily produce three-dimensional molded parts.

Korean Patent Laid-Open Publication No. 10-2009-0049608 is disclosed as a technique for a three-dimensional printer. The important thing about these 3D printers is that they can work quickly and improve the quality of products.

In particular, when metal powder, which is the raw material of molding, is fed, the blades that move the metal powder to the forming position are continuously worn, so they must be replaced after a certain period of time.

In the conventional three-dimensional printer, since the blades are formed in a straight shape, they must be replaced when abrasion occurs. Therefore, when manufacturing a product having a long molding time, there is a problem that the quality of the product may be lowered because the operation is interrupted to replace the blade.

Also, when the forming operation is performed in a closed space such as a chamber, the working environment in the chamber may be changed by replacing the blades. In addition, in order to improve the productivity, it is necessary to properly maintain the conditions and processing conditions in the chamber.

Korean Patent Publication No. 10-2009-0049608 (2009.05.18)

The present invention proposes a three-dimensional printer capable of continuously supplying blades, minimizing a work interruption time, obtaining a high-quality product while allowing quick work.

The present invention also provides a three-dimensional printer capable of improving productivity by properly maintaining conditions in a chamber in which processing is performed and conditions at the time of processing.

Other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

According to an embodiment of the present invention, there is provided an apparatus for processing a three-dimensional molded product, the apparatus comprising: a chamber section for shaping; a raw material supply section for supplying powdered raw material to the chamber section; A molding part for molding a raw material on which the raw material moved by the raw material moving part is placed and a raw material placed on the molding part is melted by laser irradiation to form a raw material, And a control unit for controlling the machining unit to process the entire three-dimensional molded product by causing the forming unit to move down after machining a line to be processed by the laser.

The raw material moving unit may include a blade of a soft material, and when the blade is in a predetermined condition, the blade may be wound so that a new surface of the blade can be used for the work.

Here, the raw material moving unit may include: a body that moves along the horizontal direction of the chamber and has a groove formed at an end thereof, a blade coupled to the groove of the body, a feed roller to which one end of the blade is coupled, And a collection roller that is coupled to another end of the blade and winds up the blade.

And a guide member coupled to one side of the body and guiding the blade when the blade is wound.

In addition, at both ends of both sides of the blade, an inclined surface having different angles may be formed, and the raw material may be pushed to the one inclined surface and the raw material may be pressed to the other inclined surface.

On the other hand, a glove capable of entering into the inside of the chamber part and being able to work can be mounted on the chamber part.

The raw material supply unit may include a charging plate coupled to a bottom surface of the chamber unit and moved up and down. The raw materials disposed on the charging plate may be pushed into a hole formed in the bottom of the chamber unit to introduce the raw material.

The forming unit includes a forming plate that is moved up and down, and heat can be supplied to the forming plate so that preheating can be performed.

Here, the forming plate includes a base plate on which a three-dimensional molded product is molded, an upper limit movable plate which is disposed below the base plate and through which the raw material flowing out to the outside flows, and the upper limit is disposed below the plate And a heat plate to which heat is applied to generate heat.

The laser irradiation may be disposed outside the chamber portion.

And an air concentration maintaining unit for maintaining the oxygen concentration inside the chamber unit, wherein the air concentration holding unit includes an oxidation prevention gas supply unit for injecting the oxidation prevention gas into the chamber unit, And the amount of the antioxidant gas is controlled according to the concentration of oxygen detected by the oxygen sensor so that the concentration of oxygen can be controlled to be constant.

Here, the oxygen concentration is controlled by controlling the internal oxygen concentration at predetermined time intervals by the control unit to operate the control loop. When the internal oxygen concentration is lower than a predetermined concentration, the rate of introduction of the antioxidant gas is decreased, The supply rate of the oxidation-preventing gas is maintained at a basic rate, and if the internal oxygen concentration is equal to or higher than a predetermined concentration, the rate of introduction of the oxidation-preventing gas is increased so that the oxygen concentration in the control section can be adjusted within a certain range.

The air circulation unit may include a filter motor driven to suck air in the chamber, a filter for filtering the air sucked by the filter motor, and an air circulation unit for filtering the air in the chamber, And a discharge line through which air filtered by the filter is supplied into the chamber portion.

The raw material moving unit is controlled to move the raw material rapidly when moving the raw material supplying unit at a high speed, and when moving the forming unit, the raw material moving unit moves at a low speed to be controlled so as to place the raw material on the forming unit.

According to the embodiment of the present invention, since the blades can be continuously supplied, there is no danger of replacing the blades during processing, and a three-dimensional molded product of stable quality can be obtained.

Further, according to the embodiment of the present invention, it is possible to improve the productivity in the chamber in which the machining is carried out, and in the maintenance of the conditions during machining.

The effects of the present invention will be clearly understood and understood by those skilled in the art, either through the specific details described below, or during the course of practicing the present invention.

1 is a perspective view of a three-dimensional printer according to an embodiment of the present invention;
2 is an exploded perspective view of a chamber portion of a three-dimensional printer according to the embodiment shown in FIG.
Figure 3 is a perspective view of the moving part of the raw material employed in the embodiment shown in Figure 1;
4 is a perspective view of a molded part employed in the embodiment shown in Fig.
Fig. 5 is a conceptual diagram showing that the laser employed in the embodiment shown in Fig. 1 forms an air curtain in the study. Fig.
Figure 6 is a flow diagram illustrating a method of adjusting oxygen concentration in a chamber portion employed in the embodiment shown in Figure 1;
Fig. 7 is a conceptual view showing the operation of the air circulation part employed in the embodiment shown in Fig. 1; Fig.
FIG. 8 is a conceptual diagram illustrating an operation of a three-dimensional printer according to the embodiment shown in FIG. 1;

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It will be possible. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Hereinafter, a three-dimensional printer according to an embodiment of the present invention will be described in detail with reference to the drawings. In the present specification, the same reference numerals are assigned to the same components in different embodiments, and the description thereof is replaced with the first explanation.

The three-dimensional printer 100 according to the embodiment of the present invention includes a chamber 1, a raw material supply unit 2, a raw material moving unit 3, a molding unit 4, a laser processing unit 5, and a control unit 6 .

In the chamber part 1, the shape processing of the three-dimensional molded product is performed. The raw material supplying section 2 supplies the powder raw material to the chamber section 1. The supplied raw material is moved to the forming section 4 by the raw material moving section 3.

Here, the raw material moving section 3 is made to be continuously supplied. Since the raw material moving part 3 pushes the raw material and moves to the forming part 4, abrasion occurs due to contact with the raw material. It is possible to continuously supply the raw material moving part 3, and thereby it is possible to proceed to a new part free from wear when the raw material moving part 3 is worn.

In the forming section 4, the raw material moved by the raw material moving section 3 is placed and the raw material is molded. The molding is carried out by means of a laser (5). The laser welding unit 5 irradiates the laser beam L onto the raw material placed on the forming unit 4 to melt it. Processing of one end face of the molded article is completed by this process.

The controller 6 moves the forming part 4 downward and repeats the above process to control the processing of the three-dimensional molded product.

In such a three-dimensional printer, even when the raw material moving part 3 is worn out when forming a large or complicated molded product, a new part can be supplied to perform the operation, so that a high-quality product can be obtained. In addition, maintenance is easy, and the worker waits and saves the trouble of monitoring work progress.

Hereinafter, the configuration of each part will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a three-dimensional printer according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a chamber part of a three-dimensional printer according to the embodiment shown in FIG.

The chamber part 1 is a part where the product is molded. The raw material supply part 2, the raw material moving part 3, the molding part 4, and the control part 6 are connected to the chamber part 1 to insert and form the raw material.

The chamber part 1 is composed of a chamber 11 and a chamber cover 12 and a chamber block 13 and the chamber cover 12 is hinged to the chamber 11 to open the chamber 11 . Two slits 111 are formed in one side wall of the chamber 11, and the connecting member 38 of the raw material moving part 3 is passed through the slit 111.

Three holes are formed in the chamber block 13 and are connected to the raw material supplying portion 2, the forming portion 4 and the raw material collecting portion 9 (see Fig. 8) from the right side to the left side in Fig. In the raw material collecting part 9, the raw material moving part 3 is filled in the forming part 4 and the remaining raw materials are collected.

The chamber cover 12 is equipped with a glove 121 which can enter into the chamber 11 and can be operated. In the three-dimensional printer 100 of the present embodiment, dust is generated because the powder is used as a raw material. Further, dust may also be generated when the chamber 11 is opened and closed. Such dusts pollute the working environment.

The use of the glove 121 mounted on the chamber cover 12 is advantageous in that the chamber 11 can be operated without being opened and the possibility that the inside of the chamber 11 is contaminated with dust can be reduced. In particular, it is possible to fix the insert plate 21 and the forming plate 41, to remove the basic raw material powder, and to planarize the raw material powder at the beginning of the operation.

Further, the interior of the chamber 11 needs oxygen concentration control or air filtering for the molding operation. This will be described later.

The raw material supplying section 2 is connected to the bottom surface of the chamber section 1 and pushes the raw material into a hole formed in the bottom surface of the chamber section 1 to supply the raw material.

The raw material supply unit 2 is coupled to the housing 22 having a space therein so that the insertion plate 21 is in close contact with the inner wall of the housing 22. [ The plate can also be raised and lowered by a driver such as a linear motor.

The powdery raw material is placed on the charging plate 21 and the charging plate 21 rises to supply the raw material into the chamber 11 through the holes formed in the chamber block 13.

The throwing plate 21 raises a certain distance each time the laser 5 works to form the cross-section line of the product, and supplies a certain amount of raw material into the chamber 11. [

The raw material moving section 3 spreads the raw material supplied from the raw material supplying section 2 to a machining area of the forming section 4 in a thin manner.

The raw material moving section 3 includes a blade 32 of a soft material wound on a roller, and when a certain condition is satisfied, the blade 32 is wound so that a new surface of the blade can be used for the work.

Referring to Fig. 3, the raw material moving section 3 includes a body 31, a blade 32, a feed roller 33 and a collecting roller 34. As shown in Fig.

The body 31 moves along the horizontal direction of the chamber 11, and a groove is formed at an end thereof, and the blade 32 is coupled to the groove. An actuator 36 is provided outside the chamber 11 and the belt 37 is rotated by the driving of the actuator 36 so that the movement of the belt 37 is transmitted to the connecting member 38 so that the body 31 moves along the horizontal direction of the chamber 11. [0064]

The actuator 36 and the belt 37 that move the body 31 of the blade 32 can be installed in a separate auxiliary chamber 14 so as to be closed.

On the other hand, one end of the blade 32 is coupled to the supply roller 33, the blade 32 is wound and installed, and the other end of the blade 32 is coupled to the collecting roller 34 and the blade 32 is wound and collected . A driver for collecting the blades can be coupled to the collection roller, and the collection can be made to take a certain amount of time after the lapse of the predetermined time.

As described above, in a three-dimensional printer using powder, a blade for applying powder is formed and mounted on a roll unit, and the friction surface expected to be worn is automatically recovered by the recovery roller, thereby preventing the quality of the molded product from deteriorating due to damage to the blade can do.

In addition, there is no danger of replacing the blade during machining, so that the worker can be relieved of the work that is always waiting and stable three-dimensional printing quality can be obtained. It is also possible to work continuously on long workpieces.

The blade 32 serves to spread the powder thinly. The blade (32) is mounted in the groove of the body (31) for easy replacement. The blade 32 is a synthetic resin material having elasticity, and may be a silicone or rubber-based material.

A guide groove is formed in the groove of the end of the body 31 so that the blade 32 is inserted and supported. On the other hand, on both sides of the blade 32, a guide projection 321 inserted into the guide groove is formed. The guide groove and guide protrusion 321 may be formed in the body 31 and the blade 32, respectively.

When guide projections are formed in the body 31 and guide grooves are formed in the blades 32, there is no part protruded when the blades 32 are wound while being wound, so that the lamination can be smoothly performed and the blades can be easily supplied and recovered.

The silicone or rubber-based blades 32 are soft and do not collide with the moldings, but are easily worn and often need to be replaced. Particularly, there is a disadvantage in that replacement is very difficult during long processing time. If the blade 32 wears during machining, the machining quality is drastically lowered and the merchantability of the product disappears.

And a guide member 35 coupled to a side surface of the body 31 and guiding the blade 32 when the blade 32 is wound. The guide member 35 may be provided on both the supply roller 33 side and the recovery roller 34 side. The guide member 35 may have a curved surface in contact with the blade 32. By providing the guide member 35, damage to the blade 32 can be prevented.

Referring to the cross-sectional view of the blade 32 shown in FIG. 3, the blade 32 has sloped surfaces at angles different from each other at the ends of both sides thereof. The raw material is supplied to one sloped surface, .

At this time, it is preferable that the raw material is supplied to the steeply sloped surface 322 and the raw material which has been formed is pressed on the mild surface 323.

With such a configuration, it is possible to supply, planarize, and compress the material by using one blade, so that the cross-sectional lines of the molded article can be stably formed and the supply of the raw material for forming the subsequent layer can be smoothly performed .

The forming part 4 is a part for actually processing a product and is provided with a forming plate 41 which is coupled to the bottom surface of the chamber part 1 and can move up and down, Once the line is formed, the forming plate 41 can be lowered to form the next section line.

The forming unit 4 is coupled to the housing 42 having a space therein in the same manner as the raw material supplying unit 2 so that the forming plate 41 is in close contact with the inner wall of the housing 42. Further, the forming plate 41 can be raised and lowered by a driver such as a linear motor.

The powdery raw material moved by the raw material moving part 3 is placed on the forming plate 41 and the cross-section line of the molded product is formed by the laser beam 5.

The shaping plate 41 makes it possible to form one section line corresponding to the position by lowering a certain distance each time the laser 5 works to form the section line of the product.

On the other hand, the forming plate 41 of the forming part 4 can be preheated by supplying heat.

4, the forming plate 41 includes a base plate 411, which is located at the uppermost position and on which a molded product is molded, a base plate 411 disposed below the base plate 411, And a heat plate 413 for generating heat by inserting the heat plate 414 and the upper plate 412.

The thermoelectric generator 414 generates heat by energization, and the heat is transferred to the base plate 411 via the upper plate 412 to preheat the raw material placed on the forming section 4 and the workpiece in operation. As a result, it is possible to cause the melting of the raw material to occur quickly at the time of the first molding, and to adhere well to the previous line even when molding the next section line.

The laser welding unit 5 melts the powdery raw material placed on the forming unit 4 to form a cross-section line of the product.

Referring to the drawings, the laser apparatus 51 of the laser machining apparatus 5 is disposed outside the chamber unit 1, which makes it possible to make the chamber 11 small and to create a low-oxygen environment, The laser processing head can be disposed in a clean environment by positioning the laser processing head outside the chamber 1. [

As shown in FIG. 5, air is discharged through the nozzle 52 to generate an air curtain, so that the laser can protect the lens of the work 5 more safely. The air curtain may be formed by discharging air from one side nozzle, by sucking air from the other side nozzle, or by discharging air from both side nozzles.

The control unit 6 controls the laser 5 to move the forming unit 4 downward after machining one line to process the entire three-dimensional molded product. Actually, the control unit 6 controls the chamber 1, the raw material supply unit 2, the raw material moving unit 3, the molding unit 4, and the laser welding unit 5 to operate organically.

The three-dimensional printer 100 according to the embodiment of the present invention may further include an air concentration holding unit 7 for maintaining the oxygen concentration in the chamber 1. 2, the air concentration holding unit 7 includes an antioxidant gas feeder 71 for injecting an antioxidant gas into the chamber 1, and an oxygen concentration sensor for detecting the concentration of oxygen in the chamber 1 It is possible to control the concentration of oxygen to be constant by adjusting the amount of the antioxidant gas to be supplied according to the concentration of oxygen detected by the oxygen sensor 73,

The antioxidant gas supply unit 71 injects the antioxidant gas at a constant flow rate from the nozzle 72 in the chamber 11 through a pneumatic filter, a pressure sensor, a flow rate controller, The antioxidant gas is a stable gas such as nitrogen, argon, and helium, and inhibits unstable reaction in the chamber.

The oxygen detection sensor 73 detects the oxygen concentration in the chamber 11 to control the oxygen concentration. As shown in FIG. 6, for example, the internal oxygen concentration is measured at predetermined time intervals to operate the control loop, When the oxygen concentration is equal to or lower than a predetermined concentration, the charging rate of the oxidation preventing gas is decreased. When the internal oxygen concentration is within a certain concentration, the charging rate of the oxidation preventing gas is maintained at the basic rate. It is possible to adjust the oxygen concentration within a certain concentration in the control section by increasing the feed rate.

Oxygen contributes to the oxidation reaction and degrades the quality of the molded product. By adjusting the oxygen concentration as described above, it is possible to produce a high quality product.

In addition, it may further comprise an air circulation section 8 for air circulation inside the chamber. The air purifier filters the air inside the chamber 11 and supplies it to the chamber 11 again.

The air circulating section 8 is provided with a filter motor driven to suck air in the chamber 11 at the filter air input end 81, a filter 82 that filters the air sucked by the filter motor, And a discharge pipe 83 for allowing air to be supplied into the chamber part 1.

The filter 82 and the motor are disposed on the rear surface of the chamber 11. More specifically, it is possible to attach the air circulation unit 8 to the auxiliary chamber 14 after having the separate auxiliary chamber 14 so that the raw material moving unit 3 is hermetically sealed.

The air inside the chamber 11 enters the filter 82 through the air hole 112 formed at the lower end of the chamber 11 and the filtered air flows through the discharge pipe 83 into the chamber 11, As shown in FIG. By this process, the fine dust (all the dusts larger than 0.1 mu m) is filtered. If there is a large amount of dust, the dust absorbs the laser beam and contaminates the optical parts. The dust can be removed by filtering to protect the laser equipment 51 and the optical parts.

On the other hand, the antioxidant gas is supplied from the upper portion of one side of the chamber 11. FIG. 7 is a conceptual diagram showing the circulation of air inside the chamber 11 by the operation of the air circulation unit 8 employed in the embodiment shown in FIG. 1. In this way, The air can be circulated. The circulation of the air is controlled by the control unit 6.

By thus recirculating the internal air, the air in the chamber can be kept clean while preventing the loss of the oxidation preventing gas.

The three-dimensional printer configured as above operates as follows.

FIG. 8 is a conceptual diagram showing the operation of the three-dimensional printer according to the embodiment shown in FIG. The three-dimensional printer 100 of the present invention can be represented by a simplified structure as shown. Although not clearly shown, the blades mounted on the earthed portion of the raw material are made of silicon and can be continuously supplied in a roll type.

The operation of the three-dimensional printer 100 according to an embodiment of the present invention is substantially the same as the operation of a conventional three-dimensional printer.

The raw material (10) in the form of a metal powder is placed in a supply part of the raw material (10) and supplied to the chamber (11) by the rise of the supply plate.

The worker can flatten the raw material 10 placed on the insertion plate 21 by using the glove 121 provided in the chamber cover 12. [

When the raw material 10 is supplied to the chamber 11, the blade 32 of the raw material moving part 3 moves and moves the raw material 10 to the forming part 4. [

At this time, the control unit 6 controls the blade 32 to move at a high speed from the position where the raw material 10 comes out of the raw material supply unit 2 to the position where the machining area comes out to the beginning of the forming unit 4, ), Proceed at low speed.

This is because the fluidity of the raw material 10 in powder form is low, and when the blade 32 pushes the raw material 10 at a high speed, it does not properly fill the gap and it takes time to fill the gap.

The blade 32 allows the raw material 10 to be stretched thinly, for example, on the order of 10 mu m to 200 mu m so as to be placed on the forming plate 41 of the forming part 4. At this time, the blade 32 pushes the raw material 10 by the steeply inclined plane 322, and by using such a surface, the supply of the raw material 10 can be performed quickly and accurately.

The raw material 10 supplied to the forming section 4 and then left is passed through the forming section 4 and recovered in the collecting section 9.

The forming plate 4 can preheat the forming plate 41 before the raw material 10 is supplied. Thus, heat is transferred to the raw material 10 supplied to the forming unit 4 to be preheated.

In this state, the raw material (10) is irradiated with a laser (L) to form the raw material (10) by sintering or melting.

Through this process, the section line of the molded article 20 is formed, and the portion of the raw material 10 in which the laser L is not irradiated remains as the powder.

Since the molded portion may have a rough portion, the blade 32 is returned to the initial position and passes through the forming portion 4 to flatten the rough portion. In this case, since the mildly curved surface 323 of the blade 32 presses the molded portion, the flattening and pressing action can be efficiently performed.

In this case as well, the blade 32 is controlled to move at a high speed from the position where the blade 32 is currently positioned to the position where the machining area is to be formed at the beginning of the forming part 4, have.

Thereafter, the raw material 10 is fed again, and the raw material 10 is thinned by the blade 32 and then collected in the collecting section 9 while the next section line is formed in the forming section 4, And then moved to the initial position to repeat planarization and pressurization. By repeating these operations several times, a three-dimensional molded article can be produced.

On the other hand, if the molded product 20 is large or complicated, the blades 32 may be abraded when a predetermined working time has elapsed, so that the blades 32 used for the operation are wound and recovered.

The predetermined working time is about five hours, and the recovery roller 34 is driven to recover the blade 32 used for the work so that the new surface of the blade 32 can be used for the work. When all the surfaces of the blade 32 are used, the next operation can be performed by replacing the roll unit.

As described above, the three-dimensional printer according to the embodiment of the present invention can replace the operation of periodically replacing blades having a predetermined length and contribute to productivity improvement.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: chamber part
11: chamber 12: chamber cover 13: chamber block 14: auxiliary chamber
111: Slit 112: Air hole 121: Glove
2: raw material supplier
21: input plate 22: housing
3: Eastern raw material
31: Body 32: Blade 33: Feed roller 34:
35: guide member 36: actuator 37: belt 38:
321: guide projection 322: steep slope surface 323: mild slope surface
4: Molded part
41: forming plate 42: housing
411: base plate 412: upper limit copper plate 413: heating plate 414: thermoelectric
5: Laser study
51: laser equipment 52: nozzle
6:
7: air concentration maintaining section
71: antioxidant gas supply device 72: nozzle 73: oxygen sensor
8: Air circulation part
81: Filter air inlet port 82: Filter 83: Discharge piping
9:
10: raw material 20: molded product L: laser
100: 3D printer

Claims (14)

An apparatus for processing a three-dimensional molded article,
A chamber part in which shaping is performed,
A raw material supply unit for supplying a powdery raw material to the chamber unit,
A raw material supplying unit for supplying raw materials to the raw material supplying unit,
A molding part in which the raw material moved by the raw material moving part is placed and the raw material is molded,
A laser for irradiating and melting a raw material placed on the forming part to form a laser is provided.
And a control unit for controlling the laser to process the entire three-dimensional molded product by causing the forming unit to move down after machining a line to be studied,
Wherein the raw material moving unit includes a blade made of a soft material and when the blade is in a certain condition, the blade is wound so that a new surface of the blade can be used for the work,
Wherein the raw material moving unit includes a body that is moved along a horizontal direction of the chamber and has a groove at an end thereof, a blade coupled to the groove of the body, a feed roller to which one end of the blade is coupled, And a collection roller that is coupled to the other end and winds and collects the blade,
The body and the blade are formed with corresponding guide grooves or guide protrusions, and the guide protrusions are formed on the body, and the guide grooves are formed on the blades,
Wherein the chamber is provided with a chamber and an auxiliary chamber, the actuator is provided in the auxiliary chamber, the belt is rotated by driving of the actuator, and a linear motion of a part of the belt is transmitted through a slit formed in the chamber The raw material is transferred to the body of the moving part so that the body moves along the horizontal direction of the chamber,
The laser is located outside of the chamber portion, and through the nozzle, the laser generates an air curtain by discharging air toward the lens of the study
Three-dimensional printer. delete delete The method according to claim 1,
And a guide member coupled to one side of the body and guiding the blade when the blade is wound. The method according to claim 1 or 4,
The three-dimensional printer according to any one of claims 1 to 4, wherein the blade has an inclined surface at an angle different from that of the blade, and the raw material is fed to the inclined surface at one side and the raw material is pressed at the other inclined surface. The method according to claim 1,
Wherein the chamber part is provided with a glove capable of entering into the chamber part and capable of being operated. The method according to claim 1,
The three-dimensional printer according to claim 1, wherein the raw material supply unit includes a charging plate coupled to a bottom surface of the chamber and moved up and down, and a raw material disposed on the charging plate is pushed into a hole formed in a bottom surface of the chamber, The method according to claim 1,
The three-dimensional printer according to any one of claims 1 to 3, wherein the forming unit includes a forming plate that is moved up and down, and the forming plate is heat-supplyable and can be preheated. 9. The method of claim 8,
The forming plate includes a base plate on which a three-dimensional molded product is formed, an upper plate disposed below the base plate and covering the raw material flowing out to the outside through the base plate, and a lower plate disposed below the upper plate, A three-dimensional printer comprising a heat plate inserted and generating heat. delete The method according to claim 1,
The air concentration maintaining unit may further include an antioxidant gas feeder for injecting an antioxidant gas into the chamber, and a controller for controlling the concentration of oxygen in the chamber, The three-dimensional printer includes an oxygen sensing sensor for sensing an oxygen concentration and controlling an amount of the oxidation-prevention gas to be controlled according to a concentration of oxygen detected by the oxygen sensor. 12. The method of claim 11,
In the control of the oxygen concentration, the control loop measures the internal oxygen concentration at predetermined time intervals in the control unit. When the internal oxygen concentration is below a predetermined concentration, the rate of the antioxidant gas is decreased. If the internal oxygen concentration is within a certain range, The three-dimensional printer adjusts the oxygen concentration within a predetermined range by keeping the charging rate of the preventing gas at the basic speed and increasing the charging rate of the oxidation preventing gas when the internal oxygen concentration is a certain concentration or more. The method according to claim 1,
The air circulation unit may include a filter motor driven to suck air in the chamber, a filter that filters the air sucked by the filter motor, and a filter that filters the air sucked by the filter motor. And a discharge pipe for allowing the air filtered by the filter to be supplied into the chamber portion. The method according to claim 1,
Wherein the raw material moving unit is controlled to move the raw material at a high speed when the raw material supplying unit moves, and to move the raw material at a low speed when the forming unit moves, and to control the raw material to be placed on the forming unit.

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