KR20240077496A - AN apparatus for 3D printing having a temperature-controlled roller and a method for 3D printing using the same - Google Patents

Abstract

One embodiment of the present invention provides a technology for forming a means for pressurizing a laminated layer generated during 3D printing, and for performing temperature control for such a pressurizing means. A 3D printing device equipped with a temperature control roller according to an embodiment of the present invention includes: a laminated head having an extruder that melts laminated material received from the outside and extrudes the laminated material, and a nozzle that receives the laminated material from the extruder and ejects the same to form a laminated layer; a roller unit formed adjacent to the nozzle, pressurizing the laminated layer while moving along the nozzle, and having a flow path formed inside; and a fluid supply unit that supports the roller unit by being coupled to the roller unit and supplies a temperature control fluid as a fluid to the flow path of the roller unit.

Description

3D printing apparatus and 3D printing method having a temperature-controlled roller {AN apparatus for 3D printing having a temperature-controlled roller and a method for 3D printing using the same}

The present invention relates to a 3D printing device and a 3D printing method having a temperature control roller, and more specifically, to forming a means for pressurizing the laminated layer created during 3D printing, and to controlling the temperature of such pressurizing means. It's about technology that makes it possible.

Carbon Fiber Reinforced Plastic (CFRP) is a material and product that combines carbon fiber with high strength and elastic modulus (stiffness) and polymer resin. CFRP is divided into thermosetting CFRP and thermoplastic CFRP depending on the type of resin. Depending on the length of the carbon fiber, it is divided into short fiber, long fiber, and continuous fiber CFRP. Such carbon fiber-reinforced composites have excellent mechanical properties, and the scope of application in various industrial technology fields is expanding.

In particular, carbon fiber-reinforced composites are widely used in automobile and aircraft parts, and accordingly, the number of cases of manufacturing large-sized parts using carbon fiber-reinforced composites is increasing. When manufacturing large parts with a 3D printer, there is an advantage in realizing products with complex shapes and reducing the total number of parts assembled.

To perform 3D printing of large products, FDM (Fused Deposition Modeling) method, SLA (Stereo Lithography Apparatus) method, Wire Melt Manufacturing (WAAM) method, Binder Jet method, etc. are used. Carbon fiber reinforced In 3D printing using composite materials, the FDM method is mainly used.

The FDM method, also called the FFF method, is a method of additive manufacturing by melting the material with heat and extruding it through a nozzle at a certain pressure. The material used in this FDM method is supplied and used in the form of a continuous filament or a plurality of segmented filaments (Choppered CFRP).

In Republic of Korea Patent No. 10-2033459 (title of the invention: 3D printer), a forming nozzle that performs a printing operation by spraying the used material; an X-axis mover that moves the molding nozzle in the X-axis direction (left and right); a Y-axis mover that moves the molding nozzle in the Y-axis direction (forward-backward direction); a Z-axis mover that moves the molding nozzle in the Z-axis direction (vertical direction); a protective wall provided to install the forming nozzle, the A plurality of infrared heaters provided to generate radiant heat in the printed product according to the operation of the forming nozzle, X-axis mover, Y-axis mover, and Z-axis mover; a position changer for varying the positions of the plurality of infrared heaters; a direction controller for controlling the irradiation direction of infrared rays emitted by the plurality of infrared heaters; And operating the direction controller based on the programmed size, shape, printing material, and printing speed of the printed product to set the direction of infrared irradiation by the plurality of infrared heaters, and turning on/off the plurality of infrared heaters. A 3D printer including a controller for controlling OFF is disclosed.

Republic of Korea Patent No. 10-2033459

The purpose of the present invention to solve the above problems is to form a means for pressurizing the laminated layer created during 3D printing and to control the temperature of this pressing means.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

The configuration of the present invention for achieving the above object includes an extruder that melts the laminated material received from the outside and extrudes the laminated material, and a nozzle that receives the laminated material from the extruder and discharges it to form a laminated layer. lamination head; a roller portion formed adjacent to the nozzle, rotating while moving along the nozzle to press the laminated layer, and having a flow path formed therein; And a fluid supply part that is coupled to the roller part to support the roller part and supplies a temperature control fluid as a fluid to the flow path of the roller part, wherein the temperature of the roller part is varied by the temperature control fluid passing through the roller part. It is characterized by

In an embodiment of the present invention, the laminated material may include carbon fiber reinforced composite (CFRP).

In an embodiment of the present invention, the roller unit includes a roller shaft having a circular bar shape and performing rotation; and a roller body formed in a cylindrical shape surrounding the roller shaft and rotating to press the laminated layer.

In an embodiment of the present invention, the roller shaft may be formed in a shape penetrating in the longitudinal direction of the roller shaft and may be provided with an axial flow path through which the temperature control fluid passes.

In an embodiment of the present invention, the roller body may be formed in a shape that penetrates a portion of the roller body and may be provided with a body passage that passes the temperature control fluid.

In an embodiment of the present invention, the fluid supply unit includes a storage tank that stores the temperature control fluid and varies the temperature of the temperature control fluid; and a pump that receives the temperature control fluid from the storage tank, pressurizes the temperature control fluid, and delivers it to the roller unit.

In an embodiment of the present invention, the fluid supply unit may further include a support portion formed at a lower portion of the fluid supply portion and coupled to the roller portion to support the roller portion.

In an embodiment of the present invention, a roller temperature sensor that measures the temperature of the roller unit may be further included.

In an embodiment of the present invention, it may further include a control unit that receives temperature information of the roller unit from the roller temperature sensor and transmits a control signal to the fluid supply unit to adjust the temperature of the temperature control fluid.

In an embodiment of the present invention, a gas injector may be further included to control the temperature of the roller unit by spraying gas toward the surface of the roller unit.

The configuration of the present invention for achieving the above object includes: a first step in which a lamination material is discharged from the nozzle provided in the lamination head to form a lamination layer; A second step in which the roller temperature sensor measures the temperature of the roller unit and the temperature information of the roller unit is transmitted from the roller temperature sensor to the control unit; A third step in which a control signal is transmitted from the control unit to a storage tank provided in the fluid supply unit to vary the temperature of the temperature control fluid; And a fourth step in which the temperature control fluid is supplied to the roller unit to change the temperature of the roller unit.

In an embodiment of the present invention, in the third step, when the control unit determines that the temperature of the roller unit needs to be increased, a control signal is transmitted from the control unit to the fluid heater of the storage tank, so that the temperature control fluid is It can be heated.

In an embodiment of the present invention, in the third step, when the control unit determines that the temperature of the roller unit should be reduced, a control signal is transmitted from the control unit to the cooling coil of the storage tank, so that the temperature control fluid is It can be cooled.

The effect of the present invention according to the above configuration is that by using a roller that pressurizes the laminated layer during 3D printing, the bonding force between the uppermost laminated layer of the already laminated layer and the laminated layer being laminated is increased, so that one laminated layer and By reducing the lamination error between the different lamination layers on top, the manufacturing error of the laminated product manufactured by the 3D printing device of the present invention can be reduced and the quality can be improved.

Additionally, the effect of the present invention is that by cooling the roller unit, the durability of the roller unit that presses the laminated layer being laminated can be maintained and deformation of the roller unit due to improved durability of the roller unit can be prevented.

And, the effect of the present invention is that the cooling of the laminated layer is performed by the roller unit, and the cooling efficiency of the laminated layer is increased.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a schematic diagram of the configuration of a 3D printing device according to an embodiment of the present invention.
Figure 2 is a schematic diagram of the configuration of a lamination head according to an embodiment of the present invention.
Figure 3 is a schematic diagram of the configuration of a fluid supply unit according to an embodiment of the present invention.
Figures 4 and 5 are schematic diagrams of the formation of an axial flow path and a body flow path in a roller unit according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the attached drawings. However, the present invention may be implemented in various different forms and, therefore, is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts unrelated to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, combined)" with another part, this means not only "directly connected" but also "indirectly connected" with another member in between. "Includes cases where it is. Additionally, when a part is said to “include” a certain component, this does not mean that other components are excluded, but that other components can be added, unless specifically stated to the contrary.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a schematic diagram of the configuration of a 3D printing device according to an embodiment of the present invention, Figure 2 is a schematic diagram of the configuration of a lamination head according to an embodiment of the present invention, and Figure 3 is an embodiment of the present invention. This is a schematic diagram of the configuration of the fluid supply unit 200 according to .

As shown in Figures 1 to 3, the 3D printing device of the present invention has an extruder 310 that melts the laminated material received from the outside and extrudes the laminated material, and receives and discharges the laminated material from the extruder 310. A lamination head provided with a nozzle 320 to form a lamination layer 10; A roller unit formed adjacent to the nozzle 320, moves along the nozzle 320 and rotates to press the laminated layer 10, and has a flow path formed therein; and a fluid supply unit 200 that is coupled to the roller unit to support the roller unit and supplies temperature control fluid, which is a fluid, to the flow path of the roller unit.

The laminated material may include carbon fiber reinforced composite (CFRP). Specifically, a piece of carbon fiber reinforced composite (chopped CFRP) having a piece-shaped length in millimeters (mm) is supplied to the extruder 310 of the lamination head as a lamination material, and such a piece of carbon fiber reinforced composite is supplied to the extruder ( After being melted and moved under pressure at 310, the laminated material may be discharged from the nozzle 320 to form the laminated layer 10.

In the 3D printing device of the present invention using the carbon fiber reinforced composite as described above, the carbon fiber reinforced composite can be manufactured by 3D printing. In the embodiment of the present invention, it is explained that a piece of carbon fiber reinforced composite is used as a laminated material, but of course, the carbon fiber reinforced composite can be supplied in the form of filament, wire, etc.

The temperature of the roller unit may vary depending on the temperature control fluid passing through the roller unit. The fluid supply unit 200 combined with the roller unit can control the temperature of the temperature control fluid and supply it to the roller unit. As the temperature control fluid flows through the inside of the roller unit, heat exchange is performed between the roller unit and the temperature control fluid. , the temperature of the roller unit can be varied by the temperature control fluid.

As the temperature control fluid, various types of refrigerants used in the prior art may be used, and in addition to the refrigerant in the form of a fluid, a gas in the form of a gas may also be used.

The laminated layer 10 discharged from the nozzle 320 is laminated on the previously laminated layer 10 in a heated state, and the roller unit can flatten the upper surface of the laminated layer 10 being laminated. By increasing the bonding force between the uppermost layer 10 of the laminated layer 10 and the laminated layer 10 being laminated, the durability of the laminated product manufactured using the 3D printing device of the present invention is improved, and at the same time, one laminated layer By reducing the stacking error between (10) and the other laminated layer 10 on top thereof, the manufacturing error of the laminated product manufactured by the 3D printing device of the present invention can be reduced and the quality can be improved.

However, when the roller unit presses the laminated layer 10 being discharged from the nozzle 320 and being laminated in a heated state as described above, the heat energy of the laminated layer 10 being laminated is transferred to the roller unit, and the temperature of the roller unit may also increase. Accordingly, the thermal fatigue of the roller unit may increase due to the continuous supply of heat energy, and the durability of the roller unit may decrease.

As described above, in order to prevent the durability of the roller unit from being deteriorated due to thermal fatigue, a temperature control fluid at a temperature capable of cooling the roller unit is supplied to the roller unit to cool the roller unit, thereby increasing the durability of the roller unit that presses the laminated layer 10 being laminated. It can be maintained and the quality can be improved by preventing deformation of the roller part due to improved durability of the roller part and consequently reducing manufacturing errors in the laminate manufactured by the 3D printing device of the present invention.

In addition, since cooling of the laminated layer 10 can be performed by the roller unit while pressing the laminated layer 10 being laminated in a cooled state as described above, the laminated layer 10 can be cooled using separate equipment. Even if cooling is not performed, cooling of the laminated layer 10 is performed by the roller unit, thereby increasing the cooling efficiency of the laminated layer 10 and at the same time reducing the installation space of the 3D printing device of the present invention to increase space utilization. It may be possible.

Additionally, there may be cases where the laminated layer 10 being laminated is heated or the already laminated layer 10 is heated. Specifically, when maintaining or increasing the temperature of the laminated layer 10 being laminated for subsequent processes such as molding, the temperature of the roller unit is increased by supplying a temperature control fluid having the temperature necessary for heating to the roller unit. This can cause the laminated layer 10 being laminated to be heated.

In addition, when the cooling of the already laminated layer 10 is delayed or the uppermost layer 10 of the already laminated layer 10 is heated to increase the bonding force with the laminated layer 10 to be laminated, the lamination layer 10 is heated. The operation of the head can be stopped and a relatively high temperature temperature control fluid can be supplied to the roller unit to heat the previously laminated layer 10 with the heated roller unit.

As described above, the temperature of the temperature control fluid supplied to the roller unit can be varied according to the purpose, and the configuration for controlling the temperature of the roller unit will be described in detail below.

Figures 4 and 5 are schematic diagrams of the formation of the axial flow path 111 and the body flow path 121 in the roller unit according to an embodiment of the present invention.

As shown in Figures 4 and 5, the roller unit includes a roller shaft 110 that has a circular bar shape and performs rotation; and a roller body 120 that is formed in a cylindrical shape surrounding the roller shaft 110 and rotates to press the laminated layer 10.

The roller part rotates using the longitudinal central axis of the roller shaft 110 as the rotation axis, and the roller body 120 surrounding the outside of the roller shaft 110 rotates according to the rotation of the roller shaft 110 and is stacked. Pressurization may be performed on the layer 10.

The roller shaft 110 may be made of metal or synthetic resin, and the roller body 120 may also be made of metal or synthetic resin. Here, synthetic resin may be a material that has heat resistance and relatively excellent thermal conductivity. In the embodiment of the present invention, it is explained that the roller shaft 110 and the roller body 120 are formed of the same material as above, but the present invention is not limited thereto.

The roller shaft 110 may be formed in a shape penetrating in the longitudinal direction of the roller shaft 110 and may be provided with an axial passage 111, which is a passage through which a temperature control fluid passes. The temperature control fluid supplied to the roller unit can flow through the roller shaft 110 through the shaft flow path 111, and at this time, the temperature of the roller shaft 110 is increased by heat exchange between the temperature control fluid and the roller shaft 110. As is varied, the temperature of the roller unit may vary.

Specifically, when the temperature control fluid heated by the fluid supply unit 200 is supplied to the roller shaft 110, the temperature of the roller unit increases, and the temperature control fluid cooled by the fluid supply unit 200 is supplied to the roller shaft 110. When supplied, the temperature of the roller unit may decrease.

And, as shown in FIG. 4, the axial flow path 111 may be formed in a straight line penetrating the roller shaft 110, and in another form, the axial flow path 111 has a direction penetrating the roller shaft 110. It can be formed in various shapes such as wave, zigzag, and spiral.

The roller body 120 may be formed in a shape that penetrates a portion of the roller body 120 and may be provided with a body passage 121, which is a passage through which a temperature control fluid passes. The temperature control fluid supplied to the roller unit can flow through the roller body 120 through the body flow path 121, and at this time, the temperature of the roller body 120 is increased by heat exchange between the temperature control fluid and the roller body 120. As is varied, the temperature of the roller unit may vary.

Specifically, when the temperature control fluid heated by the fluid supply unit 200 is supplied to the roller shaft 110, the temperature of the roller body 120 increases, and the temperature control fluid cooled by the fluid supply unit 200 is supplied to the roller body. When supplied to (120), the temperature of the roller part may decrease.

In addition, Figure 5 (a) shows one embodiment of the body flow path 121 formed in the roller body 120, and Figure 5 (b) shows the body flow path 121 formed in the roller body 120. This is about another embodiment.

As shown in (a) of FIG. 5, the body passage 121 extends in the longitudinal direction of the roller body 120 in a spiral shape with the rotation axis of the roller part as the central axis within the roller body 120, thereby forming the roller body 120. It may be formed while penetrating the interior of (120).

And, as shown in (b) of FIG. 5, the body passage 121 extends in the longitudinal direction of the roller body 120 in a zigzag shape inside the roller body 120 and penetrates the inside of the roller body 120. It can be formed while Here, the zigzag shape may be formed as a single flow path, or may be formed by connecting a plurality of zigzag shaped flow paths. The direction of the zigzag may also be formed in various directions, such as the longitudinal direction of the roller body 120 or a direction perpendicular to the longitudinal direction.

In the embodiment of the present invention, the shape of the body passage 121 formed inside the roller body 120 is described as above, but the shape of the body passage 121 is not necessarily limited to this, and the temperature control The body passage 121 may be formed in various shapes that can improve heat exchange efficiency by increasing the contact area between the fluid and the roller body 120.

By forming the body flow path 121 as described above, heat exchange between the temperature control fluid flowing along the body flow path 121 and the entire area of the roller body 120 is facilitated, and accordingly, the roller body ( 120), the heat exchange efficiency can be improved, and as a result, the temperature of the roller part can be easily varied by the temperature control fluid.

Temperature control fluid may be supplied to the shaft flow path 111 through one flow path from the fluid supply unit 200, and temperature control fluid may be supplied to the body flow path 121 from the fluid supply unit 200 through another flow path. In contrast, as shown in FIGS. 4 and 5, the axial flow path 111 and the body flow path 121 may be connected to each other.

When the axial flow path 111 and the body flow path 121 are connected to each other, the temperature control fluid discharged from the fluid supply unit 200 is first introduced into the axial flow path 111, and then the temperature control fluid flowing into the axial flow path 111 is controlled. Fluid may be injected into the body passage 121 connected to the axial passage 111.

In the above case, the temperature control fluid passing through one passage connected from the fluid supply unit 200 to the roller unit can be supplied to both the shaft passage 111 and the body passage 121, so the temperature control fluid is quickly transferred to the roller unit. can be supplied, the heat exchange efficiency between the temperature control fluid and the roller unit can be increased.

The fluid supply unit 200 includes a storage tank 210 that stores a temperature control fluid and changes the temperature of the temperature control fluid; And it may be provided with a pump 220 that receives the temperature control fluid from the storage tank 210, pressurizes the temperature control fluid, and delivers it to the roller unit. In addition, the fluid supply unit 200 may further include a support unit 230 formed at the lower portion of the fluid supply unit 200 and coupled with the roller unit to support the roller unit.

The storage tank 210 and the pump 220 are formed inside the fluid supply unit 200, the storage tank 210 is formed in the upper part of the fluid supply unit 200, and the pump 220 is formed in the lower part of the storage tank 210. It can be. In addition, the storage tank 210 can store a temperature control fluid inside, and the storage tank 210 includes a fluid heater 211, which is a heater for heating the temperature control fluid stored inside; and a cooling coil 212 for cooling the temperature control fluid stored therein.

The support unit 230 includes a first support unit 231 having the shape of a bar, one end of which is coupled to the lower end of the fluid supply unit 200, and the other end of which is coupled with one end of the roller shaft 110; and a second support 232 having the shape of a bar, one end of which is coupled to the lower end of the fluid supply unit 200, and the other end of which is coupled with the other end of the roller shaft 110.

In addition, the first support 231 is formed to extend in the longitudinal direction of the first support 231 and is provided with a first transmission passage 231a, which is a passage formed in a shape that penetrates the interior of the first support 231. can do. In addition, the second support 232 is formed to extend in the longitudinal direction of the second support 232 and is provided with a second transmission passage 232a, which is a passage formed in a shape that penetrates the interior of the second support 232. can do.

According to the combination of the roller part and the support part 230, the lower end of the first transmission passage 231a is connected to one end of the axial passage 111, and the lower end of the second transmission passage 232a is connected to the other end of the axial passage 111. It can be connected to a stage. Additionally, the upper end of the first delivery passage 231a may be connected to the pump 220, and the upper end of the second delivery passage 232a may be connected to the storage tank 210.

Accordingly, the temperature control fluid flowing along the first delivery passage 231a is introduced into one end of the axial passage 111, flows along the axial passage 111, and is discharged to the other end of the axial passage 111. The temperature control fluid may flow along the second delivery passage (232a).

At this time, the temperature control fluid is injected into the axial flow path 111, flows along the body flow path 121 connected to the axial flow path 111, and is then discharged from the body flow path 121 back to the axial flow path 111 for second delivery. It may flow in the direction of the flow path 232a.

One part of the pump 220 may be connected to the storage tank 210, and another part of the pump 220 may be connected to the top of the first delivery passage 231a as described above. Additionally, the pump 220, which has received the temperature control fluid from the storage tank 210, can pressurize the temperature control fluid and deliver it to the first delivery passage 231a.

And, as described above, the temperature control fluid that has passed through the first delivery passage 231a and then the axial passage 111 and the body passage 121 flows along the second delivery passage 232a and then flows into the storage tank 210. It can be transmitted as .

As described above, the temperature control fluid can circulate and flow in the fluid supply unit 200 and the roller unit. Accordingly, temperature control of the roller unit can be performed using the temperature control fluid without discharging the temperature control fluid to the outside. You can. By circulating the temperature control fluid in this way, it is possible to prevent a decrease in temperature control efficiency due to loss of the temperature control fluid.

The extruder 310 includes a material heater 312, which is a heater that heats and melts the laminated material supplied into the extruder 310 to produce a laminated material; and a screw 311 that transfers the laminated material from the upper part of the extruder 310 to the lower part so that the laminated material is melted and transported.

The material heater 312 is formed inside the extruder 310 at a position that can heat the laminated material transported by the screw 311 along the longitudinal direction of the screw 311, and the material heater 312 is located at the screw ( 311) can be formed on the outside. The screw 311 rotates to transfer the laminated material, and the laminated material that has been completely transferred by the screw 311 is melted into a laminated material and is discharged through the nozzle 320 coupled to the bottom of the extruder 310. You can.

The 3D printing device of the present invention may further include a base 610 that provides a plane on which the plurality of laminated layers 10 are stacked. The laminated material is discharged toward the upper surface of the flat base 610 and stacked to form the laminated layer 10, and each of the plurality of laminated layers 10 may be sequentially laminated.

A head drive unit 620 that adjusts the position of the extruder 310 may be formed on the upper part of the extruder 310. In addition, the head drive unit 620 can be combined with the gantry 650, and the head drive unit 620 can change the position of the extruder 310 while moving in the longitudinal direction (left and right directions) of the gantry 650. there is. Additionally, the head drive unit 620 can change the position of the extruder 310 while moving the extruder 310 in the vertical direction. As the position of the extruder 310 changes, the position of the nozzle 320 also changes, and the ejection position of the laminated material may also change.

In addition, a supply unit driving unit 630 that adjusts the position of the fluid supply unit 200 may be formed on the upper part of the fluid supply unit 200. Additionally, the supply unit driving unit 630 may be coupled to the gantry 650, and the supply unit driving unit 630 may change the position of the fluid supply unit 200 while moving in the longitudinal direction of the gantry 650. Additionally, the supply unit driving unit 630 can change the position of the fluid supply unit 200 while moving the fluid supply unit 200 in the vertical direction. As the position of the fluid supply unit 200 changes, the position of the roller unit may change.

By the operation of the head drive unit 620 and the operation of the supply unit drive unit 630, the positions of the nozzle 320 and the roller unit are changed to correspond to each other, and accordingly, the laminated material formed by the laminated material discharged from the nozzle 320 When forming the layer 10, pressing the roller unit against the laminated layer 10 can be performed quickly.

A material storage unit 640 may be formed on the upper part of the head driving unit 620 to store the laminated material and transfer the stored laminated material to the extruder 310. As the head driving unit 620 moves, the material storage unit 640 ) and the lamination head move in the same manner, the supply of the lamination material to the extruder 310 can be performed quickly, and the ejection of the lamination material from the nozzle 320 can be easily performed.

It may further include a gas injector 410 that sprays gas toward the surface of the roller unit to control the temperature of the roller unit. In addition, an injection mechanism eastern part 420 that changes the position of the gas injector 410 in the up and down, left and right, and forward and backward directions and rotates the gas injector 410 may be formed.

The injection mechanism eastern part 420 may be combined with the fluid supply unit 200, and accordingly, the position of the injection mechanism eastern part 420 may be changed according to a change in the position of the fluid supply unit 200. The injection mechanism eastern part 420 can store gas and then deliver the gas to the gas injector 410, and the gas injector 410 can pressurize the delivered gas and spray it toward the roller unit.

Here, as the gas, one or more substances selected from the group consisting of air, carbon dioxide (CO ₂ ), and nitrogen dioxide (CN ₂ ) may be used, and in addition, various gases that are easy to cool may be used.

The gas injected from the gas injector 410 toward the roller unit can form a vortex, and the cooling efficiency of the roller unit by the gas can be increased by injection due to the flow of gas.

In addition, when the gas injector 410 is operated by the control signal from the control unit described below, the injection mechanism unit 420 may be operated by the control signal from the control unit, and the gas injector 410 may be operated by the operation of the injection mechanism unit 420. ) The three-dimensional position and rotation angle are changed, and the gas injection position is changed, so that gas can be sprayed throughout the roller unit.

The 3D printing device of the present invention may further include a roller temperature sensor 510 that measures the temperature of the roller unit. The roller temperature sensor 510 is coupled to the first support 231 or the second support 232 and can measure the temperature of the surface of the roller body 120 using infrared rays. However, the operating method of the roller temperature sensor 510 is not limited to this, and the roller temperature sensor 510 may be installed on the roller shaft 110 or the roller body 120 to measure the temperature of the roller body 120. there is.

In addition, the 3D printing device of the present invention may further include a layer temperature sensor 520 that measures the temperature of the laminated layer 10 being laminated. The layer temperature sensor 520 is installed on the outer surface of the extruder 310 in the direction toward the fluid supply unit 200 and can measure the temperature of the surface of the laminated layer 10 being laminated using infrared rays.

The 3D printing device of the present invention may further include a control unit that receives temperature information of the roller unit from the roller temperature sensor 510 and transmits a control signal to the fluid supply unit 200 to adjust the temperature of the temperature control fluid. . Here, the control unit may receive temperature information of the laminated layer 10 from the layer temperature sensor 520 and use this to generate a control signal.

The roller standard temperature range is stored in the control unit as the standard range for the temperature of the roller part. In addition, the control unit can use the built-in calculation program to calculate the roller reference temperature range by reflecting the real-time temperature of the laminated layer 10 using the temperature information of the layer temperature sensor 520, and this roller reference temperature range is You can control the temperature of the roller unit using .

Here, when the laminated layer 10 is pressed by the roller unit, in response to the current temperature of the laminated layer 10, the minimum temperature of the roller unit and the roller unit temperature that prevents the laminated layer 10 from being overcooled by the roller unit The roller reference temperature range can be set by the maximum temperature of the roller unit to prevent the lamination layer 10 from overheating and the roller unit itself from overheating.

And, based on the temperature information of the roller temperature sensor 510, the control unit can control the temperature and flow of the temperature control fluid by comparing the current temperature of the roller unit with the roller reference temperature range.

Specifically, when the control unit analyzes that the current temperature of the roller unit is below the lowest value of the roller standard temperature range and determines that the temperature of the roller unit must be increased, the control unit operates the fluid heater 211 and pump 220 of the storage tank 210. Control signals can be transmitted.

And, by each control signal, the fluid heater 211 heats the temperature control fluid stored in the storage tank 210, and the heated temperature control fluid is pressurized by the operation of the pump 220 to pass through the first delivery passage 231a. The temperature control fluid that has passed through the first delivery passage (231a) heats the roller unit while passing through the shaft passage (111) and the body passage (121) and is then discharged from the roller unit to the second delivery passage (232a). ) and then can be delivered to the storage tank 210.

If the control unit analyzes that the current temperature of the roller unit exceeds the highest value of the roller standard temperature range and determines that the temperature of the roller unit must be reduced, the control unit operates the cooling coil 212 of the storage beam, the pump 220, and the gas injector ( 410), the control signal can be transmitted.

And, by each control signal, the cooling coil 212 cools the temperature control fluid stored in the storage tank 210, and the cooled temperature control fluid is pressurized by the operation of the pump 220 to pass through the first delivery passage 231a. The temperature control fluid that has passed through the first delivery passage (231a) cools the roller unit while passing through the shaft passage (111) and the body passage (121) and is then discharged from the roller unit to the second delivery passage (232a). ) and then can be delivered to the storage tank 210.

At this time, the gas sprayer 410 is operated to spray gas for cooling toward the roller portion, and cooling by the temperature control fluid and cooling by gas injection are performed in combination, thereby increasing the cooling efficiency of the roller portion. It can increase.

Hereinafter, the 3D printing method of the present invention using the 3D printing device of the present invention will be described.

First, in the first step, the lamination material may be discharged from the nozzle 320 provided in the lamination head to form the lamination layer 10. And, in the second step, the roller temperature sensor 510 measures the temperature of the roller part, and the temperature information of the roller part can be transmitted from the roller temperature sensor 510 to the control unit.

Next, in the third step, a control signal is transmitted from the control unit to the storage tank 210 provided in the fluid supply unit 200, so that the temperature of the temperature control fluid can be varied.

Here, when the control unit determines that the temperature of the roller unit needs to be increased, a control signal is transmitted from the control unit to the fluid heater 211 of the storage tank 210, so that the temperature control fluid can be heated.

Also, when the control unit determines that the temperature of the roller unit needs to be reduced, a control signal is transmitted from the control unit to the cooling coil 212 of the storage tank 210, so that the temperature control fluid can be cooled.

Then, in the fourth step, the temperature control fluid is supplied to the roller unit to change the temperature of the roller unit.

The remaining details of the 3D printing method of the present invention are the same as the description of the 3D printing device of the present invention described above.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as single may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the patent claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

10: Laminated layer
110: roller shaft 111: shaft oil path
120: roller body 121: body passage
200: fluid supply unit 210: storage tank
211: fluid heater 212: cooling coil
220: pump 230: support
231: first support 231a: first transmission channel
232: second support 232a: second transmission channel
310: extruder 311: screw
312: material heater 320: nozzle
410: Gas injector 420: Eastern part of injection mechanism
510: roller temperature sensor 520: layer temperature sensor
610: Base 620: Head driving unit
630: Supply unit driving unit 640: Material storage unit
650: Gantry

Claims (13)

A lamination head including an extruder that melts the lamination material received from the outside and extrudes the lamination material, and a nozzle that receives the lamination material from the extruder and discharges it to form a lamination layer;
a roller portion formed adjacent to the nozzle, rotating while moving along the nozzle to press the laminated layer, and having a flow path formed therein; and
A fluid supply unit coupled to the roller unit to support the roller unit, and supplying a temperature control fluid as a fluid to the flow path of the roller unit,
A 3D printing device equipped with a temperature control roller, characterized in that the temperature of the roller unit is varied by the temperature control fluid passing through the roller unit.
In claim 1,
A 3D printing device with a temperature control roller, wherein the laminated material includes carbon fiber reinforced composite (CFRP).
In claim 1,
The roller part,
A roller shaft having a circular bar shape and performing rotation; and
A 3D printing device with a temperature control roller, characterized in that it has a roller body that is formed in a cylindrical shape surrounding the roller shaft and rotates to pressurize the laminated layer.
In claim 3,
The roller shaft is formed in a shape penetrating in the longitudinal direction of the roller shaft and has an axial flow path that allows the temperature control fluid to pass through. A 3D printing device with a temperature control roller.
In claim 4,
The roller body is formed in a shape that penetrates a portion of the roller body and is provided with a body flow path that passes the temperature control fluid.
In claim 1,
The fluid supply unit,
a storage tank that stores the temperature control fluid and varies the temperature of the temperature control fluid; and
A 3D printing device with a temperature control roller, characterized in that it is provided with a pump that receives the temperature control fluid from the storage tank, pressurizes the temperature control fluid, and delivers it to the roller unit.
In claim 6,
The fluid supply unit is a 3D printing device with a temperature control roller, characterized in that it is formed at the lower part of the fluid supply unit and further includes a support part that is coupled to the roller part to support the roller part.
In claim 1,
A 3D printing device with a temperature control roller, characterized in that it further includes a roller temperature sensor that measures the temperature of the roller unit.
In claim 8,
3D printing with a temperature control roller, characterized in that it further comprises a control unit that receives temperature information of the roller unit from the roller temperature sensor and transmits a control signal to the fluid supply unit to adjust the temperature of the temperature control fluid. Device.
In claim 1,
A 3D printing device with a temperature control roller, characterized in that it further comprises a gas injector that sprays gas toward the surface of the roller unit to control the temperature of the roller unit.
In the 3D printing method using the 3D printing device equipped with the temperature control roller of claim 9,
A first step in which a lamination material is discharged from the nozzle provided in the lamination head to form a lamination layer;
A second step in which the roller temperature sensor measures the temperature of the roller unit and the temperature information of the roller unit is transmitted from the roller temperature sensor to the control unit;
A third step in which a control signal is transmitted from the control unit to a storage tank provided in the fluid supply unit to vary the temperature of the temperature control fluid; and
A 3D printing method comprising a fourth step in which the temperature control fluid is supplied to the roller unit to change the temperature of the roller unit.
In claim 11,
In the third step, when the control unit determines that the temperature of the roller unit needs to be increased, a control signal is transmitted from the control unit to the fluid heater of the storage tank, and the temperature control fluid is heated. 3D printing method.
In claim 11,
In the third step, when the control unit determines that the temperature of the roller unit needs to be reduced, a control signal is transmitted from the control unit to the cooling coil of the storage tank, and the temperature control fluid is cooled. method.