KR101990308B1 - Three-dimensional object - Google Patents

Abstract

According to the present invention, A work table installed inside the chamber, the work table having a plurality of powder layers sequentially stacked; And a case installed along the periphery of the work table.

Description

A three-dimensional printer

The present invention relates to a three-dimensional printer.

[0003] Referring to the background art described in Korean Patent No. 1705696, a printer generally refers to a device that prints letters, figures, etc. on a print object. Printer devices that are connected to a computer and print on the paper are widely used for business, .

Generally, as a three-dimensional printer, a device that creates a real model as if it prints three-dimensional machine parts in a computer file designed by a CAD program is called a three-dimensional printer.

In the three-dimensional printer method, SLA (Stereo Lithographic Apparatus) which uses the principle that a scanned portion is cured by injecting a laser beam to a photo-curable resin and a functional polymer or metal powder are used in place of the photo- SLS (Selective Laser Sintering) using the principle of solidification and molding, Laminated Object Manufacturing (LOM) in which the paper coated with the adhesive is cut by a laser beam in a desired cross section, And Ballistic Particle Manufacturing (BPM) using Ink-Jet printer technology. Laser-based methods were developed at the University of Texas at UOT in Austin, USA in the early 1980's / early 1990's and are known as 3D printing or selective laser sintering.

SLS technology has enabled the direct production of three-dimensional articles with high resolution and dimensional accuracy from a variety of powder materials including conventional polymer powders. Selective Laser Sintering (SLS) is described in U.S. Patent No. 4,863,568, which is incorporated herein by reference in its entirety. Selective laser sintering was commercialized by DTM Corporation. Selective laser sintering involves spreading a thin layer of powder on a flat surface.

The powder is spread on a worktable using a tool developed for use in a selective laser sintering process known in the art as a counter-rolling mechanism or a counter-roller. Continuous powder layers are sieved on a layer that has already been formed using a counter-roller and then sintered or melted with a laser. After the powder layer is deposited on the surface, the laser energy is applied to the powder in a predetermined two-dimensional pattern using a laser. The laser sinter or melt the powder together in the region where the laser beam energy impinges. The powder may be a plastic, a metal, a polymer, a ceramic or a composite.

However, in the conventional three-dimensional printer, in the process of stacking the powder layer on the work table to work the molded article, when the powder material scattered in the movement and forming process of the work table falls down and falls down the work table, There is a problem that the operation of the work table is unstable due to the accumulation of powder in the gap between the work tables and the work table is not flat and the precision of the formed article is lowered.

It is an object of the present invention to provide a three-dimensional printer capable of preventing powder from dropping below a work table or preventing dust from accumulating in a work table.

According to an aspect of the present invention, there is provided a plasma display apparatus comprising: a chamber having an internal space; A work table installed inside the chamber, the work table having a plurality of powder layers sequentially stacked; And a case installed around the work table.

The case includes an inner case in which a plurality of holes are formed in a part of an area in order to remove flying dust when the powder is stacked in a plurality of powder layers, an outer case installed along the periphery of the inner case, And may include a desorbing portion for desorbing dust to remove dusts that have been introduced into the plurality of holes.

The work table may further include a cover for covering the plurality of holes to prevent the inflow of the dust to the outside.

The three-dimensional printer according to the present invention has the effect of preventing the powder from falling down below the work table.

Further, when the powder falls down below the work table, the powder can be prevented from accumulating in the work table gap.

Further, there is an effect that after the dust is blown into the work table, the blown dust can be prevented from falling and accumulating on the work table surface.

Further, when the work table is moved up and down, the work table can be prevented from being safely moved or asymmetrically operated by the accumulated powder.

Thus, the molded product is manufactured in a desired shape, thereby improving the molding accuracy.

1 illustrates a three-dimensional printer according to an embodiment of the present invention,
FIG. 2 is a view showing a state where a work table and a case of the three-dimensional printer shown in FIG.
FIG. 3 is a view showing an inner case of the case shown in FIG. 2,
FIG. 4 is a view showing a lid unit coupled to an outer case of the case shown in FIG. 2;
FIG. 5 is a view illustrating a state in which the work table shown in FIG. 2 is moved upward and a plurality of holes are covered with the lid.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

FIG. 1 is a view showing a three-dimensional printer according to an embodiment of the present invention. FIG. 2 is a view illustrating a state where a work table and a case of the three-dimensional printer shown in FIG. Fig. 4 is a view showing the lid part coupled to the outer case of the case shown in Fig. 2, Fig. 5 is a view showing the state in which the work table shown in Fig. In which the holes are covered.

1 to 5, a three-dimensional printer according to an embodiment of the present invention includes a chamber 100, a work table 200, and a case 300.

In the chamber 100, an inner space is formed.

The work table 200 is installed inside the chamber 100, and the powders are sequentially stacked with a plurality of powder layers. The work table 200 may also include a bed 210. Here, the bed 210 may have powder deposited thereon. That is, the powder layer may be sequentially deposited on the bed 210 and may be deposited as a product to be manufactured. In addition, a piston 212 is installed below the bed 210. The piston 212 can move vertically in the z-axis direction. When the powder material placed on the upper surface of the bed 210 is sintered by the laser installed on the upper portion of the bed 210 and is vertically lowered by the piston 212 to be sintered, So that the new powder material can be laminated to a certain thickness.

The case 300 is installed along the periphery of the work table or bed 210. The case 300 may include an inner case 310, an outer case 320, and a detachable portion 330. The inner case 310 may be formed with a plurality of holes 312 in order to remove the blowing dust when the powder stacked in the bed 210 is laminated with a plurality of powder layers. Referring to FIG. 3, the plurality of holes 312 are formed in a certain area, but this is only an example, and the holes 312 may be formed in the entire area. Also, the plurality of holes 312 may be formed on both sides as well as all the inner case 310. The outer case 320 may be installed along the circumference of the inner case 310. That is, an empty space is formed between the inner case 310 and the outer case 320. These empty spaces accumulate blown dust.

The detachable portion 330 may be detachably attached to one side of the outer case 320 to remove dust accumulated in the empty space formed between the inner case 310 and the outer case 320. Therefore, the dust does not accumulate on the bed 210, but flows into the plurality of holes, and is accumulated in the empty space between the inner case 310 and the outer case 320. Therefore, dust accumulated through the desorption unit 330 can be easily removed.

Meanwhile, as shown in FIG. 5, the work table 200 may further include a cover 220. Herein, the work table 200 will be described using the same words as the bed 210. That is, when the powder layer is accumulated on the bed 210, the bed 210 moves upward or downward. At this time, in order to prevent the dust that has already flowed into the plurality of holes 312 from flowing back to the outside, the plurality of holes 312 may be covered with the lid part 330 in accordance with the moving direction of the bed 210, . This can prevent the already introduced dust from flowing back to the outside. Also, the lid part 330 may be coupled to one side of the bed by taping. However, this is merely an example, and any structure can be used as long as it has a structure for attaching or bonding. Also, the lid part 330 may be made of a rubbery material, a material capable of flapping, or a metal. In addition, although the length of the cover portion 330 is not shown, it may be shorter or longer than the cover portion 330 of FIG.

On the other hand, the powder supply part 110 and the like are disposed in the inner space of the chamber 100. The powder feeder 110 is located adjacent to the bed 210. The powder supply unit 110 may further include a powder storage unit 112 that forms a powder layer on the top of the bed 210 and stores the remaining powder.

The powder supply part 110 is preferably arranged in line with the bed 210 together with the powder storage part 112. The nose is moved from the powder feeder 110 to the bed 210 and the powder layer is formed flat on the bed 210 so that the cotter 114 moves from the bed 210 to the powder feeder 110 A powder layer is formed on the bed 210, and the remaining powder is stored while being transferred to the powder storage part 112.

The cotter 114 preferably includes a separate moving member (not shown) and a vacuum member (not shown). The moving member (not shown) serves to move the coater 114 from the upper part of the bed 210 to the left and right and the vacuum member (not shown) causes the coater 114 to move the powder stored in the powder supplying part 110 And discharges it to the upper portion of the bed 210 after the suction.

The powder supply part 110 and the powder storage part 112 are connected to a separate lifting mechanism 116 to move up and down in the chamber 100 by the operation of the lifting mechanism 116, . Since the lifting mechanism 116 is controlled by a control unit (not shown), the lifting and lowering of the bed 210 is controlled by a control unit (not shown).

The work table 200 and the case 300 are also applicable to the powder supply unit 110 and the powder storage unit 112.

As described above, according to the three-dimensional printer of the present invention, it is possible to prevent the powder from falling down below the work table.

Further, when the powder falls down below the work table, the powder can be prevented from accumulating in the work table gap.

Further, there is an effect that after the dust is blown into the work table, the blown dust can be prevented from falling and accumulating on the work table surface.

Further, when the work table is moved up and down, the work table can be prevented from being safely moved or asymmetrically operated by the accumulated powder.

Thus, the molded product is manufactured in a desired shape, thereby improving the molding accuracy.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: chamber
110: Powder supply part
112: powder storage part
114: Coater machine
116: lifting mechanism
200: Work table
210: Bed
212: piston
220:
300: Case
310: inner case
312: a plurality of holes
320: outer case
330:

Claims (3)

A chamber provided with an internal space;
A work table installed inside the chamber, the work table having a plurality of powder layers sequentially stacked; And
And a case installed along the circumference of the work table,
In this case,
An inner case in which a plurality of holes are formed in a part of the area to remove flying dust when the powder is laminated with a plurality of powder layers,
An outer case installed along the periphery of the inner case,
And a removable attachment / detachment unit installed on one side of the outer case to remove dust adhering to the plurality of holes. delete The method according to claim 1,
The work table includes:
Further comprising a lid part covering the plurality of holes to prevent the inflowing dust from flowing out to the outside.

Images