WO2018155998A1

WO2018155998A1 - Resin tank for 3d printer

Info

Publication number: WO2018155998A1
Application number: PCT/KR2018/002405
Authority: WO
Inventors: 김대훈; 주용호; 유상욱; 김동혁
Original assignee: 주식회사 쓰리딜라이트
Priority date: 2017-02-27
Filing date: 2018-02-27
Publication date: 2018-08-30
Also published as: KR20180098886A; KR101935924B1

Abstract

The present invention relates to a 3D printer using photocurable plastic and, more specifically, to a resin tank for a 3D printer, comprising: a base frame which forms the lower surface of the tank; a side frame which forms the side surface of the tank so as to allow the accommodation of a liquid photocurable resin and is coupled to the upside of the base frame; a middle frame coupled between the base frame and the side frame; a transparent plate inserted between the base frame and the middle frame; and a film inserted between the middle frame and the side frame.

Description

Resin Tank for 3D Printer

The present invention relates to a 3D printer using a photocurable plastic, and more particularly, to a resin tank of a 3D printer containing a liquid in which the photocurable plastic is dissolved.

3D printer was developed to make a prototype before the product was released. Instead of making a real product to find out what is wrong with the actual product, a 3D printer is used to produce the same prototype as the actual product, saving cost and time. In addition, it can be used in large corporations and factories because it can identify problems with real products.

Such a three-dimensional printer converts a three-dimensional shape modeled through software such as a CAD system into slice data divided into a plurality of thin cross-sectional layers, and then uses it to form a plate-like sheet, and stacks it to complete the sculpture. In this way, a rapid forming method has been developed as a method of forming a sheet in the form of a plate.

Such rapid forming methods include rapid forming methods using powders such as gypsum or nylon powder, rapid forming methods using plastic liquids using liquids (resins) in which photocurable plastics are dissolved, and solids produced by plastics like threads. It can be divided into a rapid molding method using a plastic thread.

Among them, the rapid molding method using a plastic liquid irradiates light to a tank containing a photocurable resin that hardens when light is applied, and the photocurable resin irradiated with light hardens according to the shape of the light, and when a thin plate-like sheet is produced, As a method of laminating | stacking, there exist a regulation liquid surface system and a free liquid surface system.

Among them, the regulated liquid surface method irradiates light from the bottom of the tank having a bottom surface formed of a transparent plate, and places a bed in the tank to cure the resin in the tank. Subsequently, the resin cured product is formed and laminated while transferring the bed with the cured resin cured product upward. At this time, a film having a certain elasticity is attached between the bed and the transparent plate so that the bed with the resin cured material is easily detached from the water tank. Over time, the film is less elastic, and the surface is damaged, so it will be replaced after a certain time.

The conventional water tank is not easy to replace the film, when the bonding portion of the water tank is located in the upper side of the tank, the remaining liquid photocurable plastic in the process of discarding the remaining liquid photo-curable plastic solidified in the resin tank is generated Due to the cargo, disassembly and assembly of the tank is not easy, and there is a problem in that cost and time are wasted in removing the cured resin.

The present invention has been made to solve the above problems, and an object of the present invention is to form a resin tank of a 3D printer, which is easy to disassemble and assemble even if a resin cured product is formed around the upper side of the tank by forming a coupling portion of the water tank. In providing.

In particular, it is to provide a resin tank of the 3D printer to facilitate the exchange of the film by changing the film through the lower coupling portion of the tank.

In addition, the groove is formed along the periphery of the coupling portion, and the periphery of the film is configured to be fitted in the groove to facilitate the formation of the tension of the film when bonding the water tank, and to provide a resin tank that prevents the leakage of the photocurable liquid contained in the tank. .

Resin tank of the 3D printer according to an embodiment of the present invention, the base frame to form a lower surface of the tank; A side frame which forms a side surface of the tank to accommodate the liquid photocurable resin, and is coupled to an upper side of the base frame; A mid frame coupled between the base frame and the side frame; A transparent plate sandwiched between the base frame and the mid frame; And a film sandwiched between the mid frame and the side frame. It includes.

The resin bath may include a sealing member provided between the mid frame and the film and formed along a circumference of the film; It further includes.

In addition, the upper surface of the mid frame, the sealing member insertion groove is formed recessed downward so that the sealing member is seated.

The side frame may further include a pressing protrusion protruding downwardly along a lower circumference of the side frame so as to sequentially press the film and the sealing member when combined with the mid frame; It includes.

The mid frame and the side frame may be bolted or screwed to each other, and the bolt or screw may pass through the circumference of the mid frame and the film at the lower side of the mid frame and upwardly formed at the lower side of the side frame. It is characterized in that coupled to.

In addition, the anti-foam film provided between the upper surface of the transparent plate and the lower surface of the film; It includes more.

In addition, embossing is formed on the upper surface, the lower surface, or the upper and lower surfaces of the anti-foaming film.

In addition, the embossing is formed by coating an adhesive material on the lower surface of the anti-foam film, or is formed integrally with the anti-foam film.

In addition, the side frame, spouts are formed in any one of the upper peripheral edge.

The resin bath of the 3D printer of the present invention having the above-described configuration has an advantage of easy disassembly and assembly even when the cured resin is generated on the upper side of the bath, and easy removal of the cured resin to maintain the resin bath.

In addition, since the film is replaced through the bottom joining portion of the water tank, and the tension is formed by inserting the circumference of the film in the groove formed along the joining portion, the replacement of the film is easy, thereby reducing the cost and time for the film replacement. have.

In addition, there is an effect of preventing the leakage of the photocurable liquid contained in the resin tank by forming an airtight structure through the coupling portion.

1 is a perspective view of a 3D printer using a photocurable plastic applied to the resin tank of the present invention

Figure 2 is a cross-sectional view of the 3D printer using a photocurable plastic applied to the resin tank of the present invention

Figure 3 is a perspective view of the resin tank of the present invention

Figure 4 is an exploded perspective view of the resin tank of the present invention

Figure 5 is a cross-sectional view and a partial enlarged view of the resin tank of the present invention

Figure 6 is an enlarged exploded cross-sectional view of the resin tank of the present invention.

Figure 7 is a cross-sectional view of the film and the transparent plate bonding of the present invention

8 is a cross-sectional view of the anti-foam film of various embodiments of the present invention

Description of the sign

1000: 3D Printer

100: resin tank

110: base frame

120: mid frame

130: sealing member

150: side frame

G: transparent plate

F: film

AF: Bubble-proof film

200: light irradiation means

300: bed part

Hereinafter, an embodiment of the present invention as described above will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a 3D printer 1000 using a photocurable plastic applied to the resin tank 100 according to an embodiment of the present invention, Figure 2 is a resin tank 100 according to an embodiment of the present invention A cross-sectional view of the 3D printer 1000 using photocurable plastic to which is applied is shown.

As shown, the 3D printer 1000 is made of a regulated liquid surface method, and the bottom is transparent to the resin tank 100 and the resin tank 100 is located below the irradiation of light to the bottom of the resin tank 100 The light irradiation means 200 and the bed portion 300 which is positioned above the resin tank 100 and moves the bed up and down so that the bed is located inside the resin tank 100 is configured.

The 3D printer 1000 of the above configuration accommodates the liquid in which the photocurable plastic is dissolved in the resin tank 100, and is placed on the bottom surface of the bed through the light irradiation means 200 in a state where the bed is placed in the resin tank 100. The resin is cured by irradiating with light. Subsequently, the 3D molded object is printed by forming and stacking the resin cured product while transferring the bed to which the cured resin cured product is attached upward.

Hereinafter, the resin tank 100 of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view of a resin tank 100 according to an embodiment of the present invention. As shown, the resin water tank 100 is not significantly different from the conventional resin water tank, and is formed such that a liquid resin is accommodated therein. However, the resin tank 100 of the present invention is any one of the upper edge portion of the water tank 100 to minimize the liquid resin remaining around the upper side of the water tank 100 when pouring out the remaining liquid resin to cure Spout 151 is formed. Therefore, the liquid resin is discharged only through the spout 151 to prevent the liquid resin from remaining around the spout 151 and hardening.

Hereinafter, a detailed configuration of the resin water tank 100 of the present invention will be described in detail with reference to the accompanying drawings.

4 is an exploded perspective view of the resin water tank 100, a cross-sectional view of the resin water tank 100 is shown in FIG. 5, and a partially enlarged exploded cross-sectional view of the resin water tank 100 is shown in FIG. 6.

The resin tank 100 includes a base frame 110 forming a lower portion of the tank, a side frame 150 forming side surfaces of the tank, and a base frame for fixing the transparent plate G and the film F. It is configured to include a mid frame 120 coupled between the 110 and the side frame 150.

Therefore, the transparent plate G may be coupled between the base frame 110 and the mid frame 120, and the film F may be coupled between the mid frame 120 and the side frame 150. In addition, a sealing member 130 for sealing may be provided between the film F and the mid frame 120.

The base frame 110 is formed in the form of a rectangular frame having a space in the center, the transparent plate seating portion 111 is formed on the upper side along the inner circumference. In addition, the mid frame seating portion 112 is formed above the outer circumference of the transparent plate seating portion 111. The transparent plate seating portion 111 is formed to have a height lower than that of the mid frame seating portion 112. When the mid frame 120 is coupled to the mid frame seating portion 112 in a state in which the transparent plate G is seated on the transparent plate seating portion 111 through the above configuration, the transparency formed inside the mid frame 120 is transparent. The plate fixing protrusion 126 presses the upper periphery of the transparent plate G to fix the transparent plate G.

Four corners of the base frame 110 are formed through the first screw coupling hole (110a) up and down. Accordingly, when the base frame 110 and the mid frame 120 are coupled, the screw or bolt penetrates the first screw coupling hole 110a to the first female screw hole 120a recessed upward at four corners of the mid frame 120. Can be combined.

In addition, a plurality of first-first screw coupling holes 110b are formed along the circumference of the base frame 110. Accordingly, when the base frame 110, the mid frame 120, and the side frame 150 are coupled, the screws or bolts are coupled to the first-first screw coupling holes 110b and the second screw coupling holes 121 of the midframe 120. It may be coupled to the second female threaded hole 151 recessed upwardly along the circumference of the side frame 150 through.

The mid frame 120 is formed in the form of a square frame having a space in the center, and the second screw coupling hole 121 may be formed to penetrate up and down along a circumference. Therefore, the second female threaded hole formed by screwing or bolting through the periphery of the second screw coupling hole 121 and the film F at the lower side of the mid frame 120 and recessed upward along the lower periphery of the side frame 150 ( 151.

At this time, the upper surface of the mid frame 120 may be formed with a sealing member insertion groove 125 recessed downward along the circumference, the side frame (with the sealing member 130 is seated in the sealing member insertion groove 125) 150 may be coupled to an upper side of the mid frame 120. Therefore, the sealing member 130 may be formed to correspond to the sealing member insertion groove 125.

Sealing member 130 is made of an elastic material is configured to prevent the liquid resin to be filled in the resin tank 100 is leaked through the coupling portion of the side frame 150 and the mid frame 120.

The base frame 150 is formed in a rectangular frame having a predetermined height to accommodate the liquid resin therein. As described above, the base frame 150 is configured to be coupled to the upper side of the mid frame 120 in which the sealing member 130 is fitted. In this case, the circumference of the film F may be fitted to the coupling surface of the mid frame 120 and the base frame 150. A third screw coupling hole F1 corresponding to the second screw coupling hole 121 may be formed around the film F.

At this time, the lower engaging surface of the side frame 150 may be formed with a pressing protrusion 155 protruding downward along the circumference so as to press the upper surface of the sealing member 130 when engaging with the mid frame 120. The pressing protrusion 155 is configured to pressurize the film F and the sealing member 130 when the side frame 150 and the mid frame 120 are coupled to each other so that the film F is firmly fixed and the film F at the same time. The liquid resin to be filled in the upper side of the side frame 150 and the mid frame 120 is further prevented from leaking through the coupling portion.

The water tank 100 having the above configuration is disposed so that the upper surface of the transparent plate G and the lower surface of the film F come into contact with each other. Due to elasticity of the film F, the film F is spaced apart from the transparent plate G due to the elasticity of the film F, and then the film F is restored to its original position. In this case, the bubble is spaced between the film F and the transparent plate G. May be generated.

At this time, if bubbles are generated between the film (F) and the transparent plate (G), since printing defects may occur due to bubbles when light is irradiated into the water tank 100, the present invention is a film (F) and the transparent plate (G) In order to prevent bubbles from occurring, the structure is as follows.

7 shows a perspective view of the combined film F, the antifoam film AF, and the transparent plate G of the present invention, and FIG. 8 is a cross-sectional view of the antifoam film AF of various embodiments.

6 to 8, a bubble prevention film AF is further provided between the film F and the transparent plate G. In more detail, the anti-foam film AF may be attached to the upper surface G1 of the transparent plate G. Fine embossing E may be formed on the top, bottom, or top and bottom surfaces of the anti-foaming film AF. (See FIG. 8) The embossing E may be coated or integrally formed with the anti-foaming film AF. It may be formed. Due to the fine emboss (E) as described above, when the film (F) is restored to its original position, the bubble or oil film is allowed to escape around the film (F) through the fine emboss (E) of the anti-foaming bubble (AF). ) And bubbles are formed between the transparent plate G and the transparent plate G.

When the emboss (E) is formed on the upper surface of the anti-foam film (AF) as shown in Figure 8a due to the fine projection of the emboss (E) located between the film (F) and the anti-foam film (AF) film (F) In the process of desorption of the resin cured resin, the compressive force between the film F and the anti-foam film AF in which the embossing E is formed is removed so that the resin cured resin does not adhere to the film F and the upper stage of the bed part 300 side. There is an advantage to easily attached to.

As shown in FIG. 8B, when the emboss E is present on the lower surface of the anti-foam film AF, bubbles or an oil film is generated between the anti-foam film AF and the transparent plate G due to the fine protrusion of the emboss E. FIG. To prevent.

As shown in FIG. 8C, when the upper and lower surfaces of the anti-foam film AF have emboss (E), both effects described above can be expected. However, when the emboss (E) is formed on both upper and lower surfaces, either If formed on the surface, there is a difference in transparency and correlates with the transparency of the appearance of the output, so one of three methods should be appropriately selected and used according to the purpose of printing.

The technical spirit should not be interpreted as being limited to the above embodiments of the present invention. Various modifications may be made at the level of those skilled in the art without departing from the spirit of the invention as claimed in the claims. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims

A base frame forming a bottom surface of the tank;

A side frame which forms a side surface of the tank to accommodate the liquid photocurable resin, and is coupled to an upper side of the base frame;

A mid frame coupled between the base frame and the side frame;

A transparent plate sandwiched between the base frame and the mid frame;

A film sandwiched between the mid frame and the side frame;

Resin tank of the 3D printer, including.
The method of claim 1,

The resin tank,

A sealing member provided between the mid frame and the film and formed along a circumference of the film;

The resin tank of the 3D printer, further comprising.
The method of claim 2,

On the upper surface of the mid frame,

A resin tank of a 3D printer, in which a sealing member insertion recess is formed recessed downward so that the sealing member is seated.
The method of claim 3, wherein

The side frame,

A pressing protrusion protruding downwardly along a lower circumference of the side frame so as to sequentially press the film and the sealing member when combined with the mid frame; Resin including a 3D printer.
The method of claim 1,

The mid frame and the side frame,

Bolts or screws are combined,

Resin tank of the 3D printer, characterized in that the bolt or screw is coupled to the female screw hole formed through the circumference of the mid frame and the film in the lower side of the mid frame and formed upward from the lower side of the side frame.
The method of claim 1,

An anti-bubble film provided between an upper surface of the transparent plate and a lower surface of the film; The resin tank of the 3D printer, further comprising.
The method of claim 6,

Resin tank of the 3D printer, embossing is formed on the upper surface or the lower surface or the upper and lower surfaces of the bubble prevention film.
The method of claim 7, wherein

The embossed,

Resin tank of the 3D printer, characterized in that formed by coating an adhesive material on the lower surface of the anti-foam film, or integrally formed with the anti-foam film.
The method of claim 1,

In the side frame,

A resin bath of a 3D printer, wherein spouts are formed on any one of the upper peripheral edges.