KR20200019273A - 3d printer having adhesive coating function and operating method thereof - Google Patents

Abstract

Disclosed by the present invention are a 3D printer having an adhesive application function and a driving method thereof. According to an embodiment of the present invention, the 3D printer includes: a printing bed; a first printing nozzle unit which discharges a first material onto the printing bed; a second printing nozzle unit which discharges a second material onto the printing bed; an adhesive output unit which outputs and applies adhesive having a predetermined adhesive force to the upper or side surface of the discharged first material or the second material; and a control unit which alternately drives the first printing nozzle unit and the second printing nozzle unit, sequentially drives the adhesive output unit whenever the first printing nozzle unit or the second printing nozzle unit is driven, and controls a sculpture of a 3D model to be formed on the printing bed by bonding and laminating a plurality of layers formed with at least one of the first material and the second material. The present invention improves adhesion between materials without deteriorating quality.

Description

3D printer with adhesive application function and driving method thereof 3D PRINTER HAVING ADHESIVE COATING FUNCTION AND OPERATING METHOD THEREOF

The present invention relates to a 3D (3Dimension) printer, and more particularly to a 3D printer having an adhesive coating function for the output of the composite and a driving method thereof.

In general, the construction and machinery sectors use composites of different materials to improve the limits of strength, ductility, and brittleness of a single material. For example, materials with high fracture strength but low ductility may be susceptible to impact or bending loads. To improve this, the ductility of the composite can be increased by mixing the ductile material between the strong materials. In this case, the breakdown strength is reduced, but the ductility is increased, and the total energy absorbed by the material is expected to be increased as compared with the strong single material.

With the recent growth of the 3D printer market and the development of technology, it is relatively easy to manufacture a composite material in which two or more materials are mixed in a complicated form using a 3D printer.

In particular, when a dual extruder 3D printer is used, a composite material can be output using two materials. After the materials are set in the 3D modeling file and input into the 3D printer, the two nozzles are alternately outputted to produce the composite material.

Dual-injection 3D printers output composites using one structural material, one supporter material, or two structural materials. When the supporter material is output from one nozzle, the structure material and the supporter material are mixed, but the supporter material can be easily dissolved by water or other processing after the output is completed, so as to produce a single injection 3D printer. It can make a tough structure. When two structural materials are used, the combined action of the two materials results in different physical properties than a single material.

However, in the printing process of the 3D model, the bonding between the materials may not be performed well depending on the combination of the two materials. If the separation of the two materials easily occurs, even if a slight load is applied, there is a problem that the separation between the materials occurs to lose the original function.

Some of the problems of separation between materials can be improved by utilizing functions generally provided by 3D printers such as temperature control, cooling, and ironing. The thermostat increases the nozzle temperature, allowing the two materials to bond in a liquid state, which results in a slight improvement in adhesion between the materials. Cooling is a function that cools the heat by starting the fan as soon as the material is discharged from the nozzle. The ironing function is a process in which a hot nozzle smoothly unfolds the top surface of an already printed part. However, these features were not enough to prevent separation between materials, and instead of improving the adhesion between materials, the quality of the result was reduced.

When fabricating a specific structure of two materials with an existing dual injection 3D printer, it is difficult to realize the adhesion between the materials required for the functional model mentioned above to function properly. Therefore, when manufacturing a specific functional model consisting of two materials, as the strength of the adhesion between the two materials is required, it is necessary to develop a 3D printer equipped with a performance capable of realizing this.

Patent Application Publication No. 10-1641709, Publication Date July 29, 2016 Patent Application Publication No. 10-1648767, Publication Date August 17, 2016

In order to solve the problems of the prior art, an object of the present invention is to include two nozzle parts for outputting a material and one output part for outputting an adhesive, and to drive two nozzle parts alternately, one nozzle part being the first The present invention provides a 3D printer having an adhesive coating function and a driving method thereof, in which an output part injects an adhesive to the top or side of the first material and then another nozzle part outputs a second material.

However, the object of the present invention is not limited to the above objects, and may be variously expanded within a range without departing from the spirit and scope of the present invention.

In order to achieve the object of the present invention, a 3D printer according to an aspect of the present invention is a printing bed; A first printing nozzle unit for discharging a first material on the printing bed; A second printing nozzle unit for discharging a second material on the printing bed; An adhesive output unit configured to output and apply an adhesive having a predetermined adhesive force to an upper side or a side surface of the discharged first material or the second material; And alternately driving the first printing nozzle unit and the second printing nozzle unit, and sequentially driving the adhesive output unit whenever the first printing nozzle unit or the second printing nozzle unit is driven. It may include a control unit for controlling a plurality of layers of at least one of the two materials to be laminated by adhesive bonding to form a 3D model sculpture on the printing bed.

In addition, the adhesive output unit may be an injector for spraying the adhesive on the top or side of the first material or the second material.

In addition, the adhesive output unit may be a nozzle for discharging the adhesive on the top or side of the first material or the second material.

In addition, when the thickness of the adhesive to be formed through the adhesive output unit is set to a, the first printing nozzle unit to reduce and output each of the thickness of the first material and the thickness of the second material by a / 2. And driving the second printing nozzle unit.

In addition, the first printing nozzle unit and the second printing nozzle unit may be arranged side by side, move together, and be driven to discharge any one of the first material and the second material.

In addition, the 3D printer according to the present invention may further include a transfer unit for moving the first printing nozzle unit, the adhesive output unit, the second printing nozzle unit in the first axis direction and the second axis direction perpendicular to each other on the same horizontal plane. Can be.

In addition, the 3D printer according to the present invention is connected to the first printing nozzle portion and the second printing nozzle portion, any one of the first printing nozzle portion and the second printing nozzle portion to output the material to the printing bed It may further include a nozzle driving unit for moving in the vertical direction with respect to.

In addition, the 3D printer according to the present invention may further include a bed transfer unit for moving the printing bed in the vertical direction.

In addition, when the layer is formed of two materials of the first material and the second material, the first material and the second material may be formed by alternately stacking at least one or more times in the vertical direction or the horizontal direction. have.

According to another aspect of the present invention, there is provided a method of driving a 3D printer, comprising: a 3D model input step of obtaining information on each layer by dividing the 3D model into a plurality of layers when receiving a 3D model; A material discharging step of discharging a first material or a second material based on the obtained information on each layer; An adhesive output step of outputting and applying an adhesive having a predetermined adhesive force to an upper side or a side surface of the discharged first material or the second material; And repeatedly performing the material discharging step and the adhesive output step to laminate a plurality of layers of the first material and the second material by adhesive bonding to complete the sculpture of the 3D model. It may include a step.

In addition, the adhesive output step may be applied by spraying the adhesive to the top or side of the first material or the second material using an injector.

In addition, in the adhesive output step, the adhesive may be discharged and applied to the upper side or the side surface of the first material or the second material by using a nozzle.

As described above, the present invention includes two nozzle parts for outputting a material and one output part for outputting an adhesive, and when two nozzle parts are alternately driven, one nozzle part outputs a first material. After the output part sprays the adhesive, the other nozzle part outputs the second material, such as a laminated structure in which two or more materials are stacked or a complex structure that must be manufactured using two materials such as a joint made of bone and ligaments. In manufacturing, it may be possible to improve the adhesion between materials and further develop the adhesion as desired by the manufacturer.

In addition, the present invention can reduce the occurrence of cracks or induce crack shapes to increase the total amount of energy absorbed before the composite is destroyed.

However, the effects of the present invention are not limited to the above effects, and may be variously expanded within a range without departing from the spirit and scope of the present invention.

1A to 1B are diagrams illustrating a 3D printer according to an embodiment of the present invention.
2 is a view for explaining the principle of movement of the printing bed shown in FIG.
3 is a view for explaining the principle of movement of the transfer unit shown in FIG.
4 is a view showing a detailed configuration of the dual printing nozzle unit shown in FIG.
5 is a view for explaining the principle of operation of the nozzle drive unit.
6 is a view for explaining the principle of operation of the material supply unit shown in FIG.
7 is a view showing a method of driving a 3D printer according to an embodiment of the present invention.
8 is a view for explaining the principle of material stacking according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, a 3D printer having an adhesive coating function and a driving method thereof according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings. In particular, the present invention includes two nozzle portions for outputting a material and one output portion for outputting an adhesive, and when two nozzles are alternately driven, but one nozzle portion outputs the first material, the upper portion of the first material or A new scheme is proposed in which the output nozzle sprays the adhesive on the side and the other nozzle outputs the second material.

In detail, a dual extruder 3D printer may be used to produce a model composed of two materials without a separate bonding operation. When the 3D modeling file to be produced is input to the 3D printer, the two nozzles are alternately outputted to output the respective materials according to the input 3D model to complete the production. However, in the printing process of the model, there is no adhesion between the parts made of separate materials, and other materials are output directly on the already printed material, so the adhesion between the materials is difficult.

Therefore, the present invention is equipped with an additional adhesive injector to the two nozzles for outputting the material of such a conventional dual injection 3D printer, by filling a specific adhesive in the adhesive injector to be sprayed when the model is manufactured .

1A to 1B are diagrams illustrating a 3D printer according to an embodiment of the present invention.

1A to 1B, a 3D printer according to an embodiment of the present invention may produce an input model while the materials are output from the nozzle by FDM (Fused Deposition Modeling) and stacked one by one. The dual injection 3D printer includes a frame 110, a printing bed 120, a bed conveying part 122, a conveying part 130, a dual printing nozzle part 140, a material supply part 150, and an adhesive agent. The output unit 160 may include an adhesive supply unit 170 and a controller 180.

The frame 110 may form the overall frame of the 3D printer. The frame 110 may be formed in a hexahedron having an overall outer shape, but is not limited thereto.

The printing bed 120 may provide a plane on which a predetermined three-dimensional model is formed. The bed transfer unit 121 may move the printing bed 120 in the third axis direction relative to the dual printing nozzle unit 140 linearly moving in the first axis direction and the second axis direction. Here, the first axis direction indicates the X axis direction, the second axis direction indicates the Y axis direction, and the third axis direction indicates the Z axis direction.

2 is a view for explaining the principle of movement of the printing bed shown in FIG.

Referring to FIG. 2, the bed conveying unit 121 according to an exemplary embodiment of the present invention is disposed below the printing bed 120 and ascends or descends in the third axial direction, thereby printing 120 disposed above. ) Can be moved, ie, raised or lowered in the third axis direction. For example, the bed transfer unit 121 may lower the printing bed 120 in the third axis direction by a predetermined distance whenever each layer of the 3D model is stacked on the printing bed 120. In this case, the bed transfer unit 121 may lower the printing bed 120 by the height stacked on the printing bed 120.

The transfer unit 130 is coupled to the dual printing nozzle unit 140 and the adhesive output unit 160 to linearly move the dual printing nozzle unit 140 and the adhesive output unit 160 in the first axis direction and the second axis direction. Can be. The transfer unit 130 may include a first transfer unit 131 and two second transfer units 132 disposed perpendicular to each other on a horizontal plane.

3 is a view for explaining the principle of movement of the transfer unit shown in FIG.

Referring to FIG. 3A, the transfer unit 130 according to an embodiment of the present invention includes a first transfer unit 131 and two second transfer units 132, and the first transfer unit 131 is dual. Coupled to one side of the printing nozzle unit 140, it is possible to linearly move the dual printing nozzle unit 140 in the first axis direction.

Referring to FIG. 3B, the transfer unit 130 according to an embodiment of the present invention includes a first transfer unit 131 and two second transfer units 132, and two second transfer units 132. The both ends of the first transfer unit 131 is coupled, it is possible to linearly move the dual printing nozzle unit 140 in the second axis direction.

The dual printing nozzle unit 140 may be implemented with two nozzles to form a composite by outputting different materials on the printing bed 120 through each of the two nozzles. For example, by forming a composite material by mixing a material of high strength and a material of high ductility through the dual printing nozzle unit 140, a composite material having reduced breaking strength but increasing ductility and increasing the total energy absorbed by the material can be obtained. .

4 is a view showing a detailed configuration of the dual printing nozzle unit shown in FIG.

Referring to FIG. 4, the dual printing nozzle unit 140 according to an embodiment of the present invention may include a first printing nozzle unit 141, a second printing nozzle unit 142, a nozzle driving unit 143, and a connection unit 144. It may include.

The first printing nozzle unit 141 may output the first material, and the second printing nozzle unit 142 may output the second material. The first printing nozzle unit 141 and the second printing nozzle unit 142 may be disposed side by side at a predetermined distance, move together, and be driven to discharge any one of the first material and the second material.

The nozzle driver 143 includes a plurality of motors, and linearly moves in the X-axis direction along the first transfer unit 131 using the motor, or the first printing nozzle unit 141 and the second printing nozzle unit 142. ) Can be linearly moved in the Z-axis direction.

The connection part 144 may connect the dual printing nozzle part 140 to the first transfer part 131.

5 is a view for explaining the principle of operation of the nozzle drive unit.

Referring to FIG. 5A, the nozzle driving unit 143 may lower the first printing nozzle unit 141 by a certain distance in the Z-axis direction by using a motor when outputting the first material. When the output of the first printing nozzle unit 141 is finished, the nozzle driver 143 may raise the nozzle driving unit 141 again by a distance of lowering the first printing nozzle unit 141.

Referring to FIG. 5B, when the nozzle driver 143 intends to output the second material, the nozzle driving unit 143 may lower the second printing nozzle unit 142 by a certain distance in the Z-axis direction by using a motor. When the output of the second printing nozzle unit 142 is finished, the nozzle driving unit 143 may raise the first printing nozzle unit 142 again by a distance lowered.

The nozzle driving unit 143 is supplied to the first printing nozzle unit 141 and the second printing nozzle unit 142 in addition to the motor for driving the first printing nozzle unit 141 and the second printing nozzle unit 142. The apparatus may further include a heater for making the solid state material into the liquid state material. In addition, the nozzle driver 143 may further include a fan for cooling the heat of the material in the liquid state output through the first printing nozzle unit 141 and the second printing nozzle unit 142.

The material supply unit 150 may supply a filament-shaped material in a solid state made of a thermoplastic material like a thread to the dual printing nozzle unit 140 through a predetermined path. The material supply unit 150 supplies a first material supply unit 151 for supplying a first material to the first printing nozzle unit 141 and a second material supply unit 152 for supplying a second material to the second printing nozzle unit 142. ) May be included.

At this time, the thermoplastic material may typically include a PLA (Poly Lactic Acid) resin, PVC (Polyvinyl Chloride) resin, ABS (Acrylonitrile Butadiene Styrene) resin, PPS (Poly Phenylene Sulfide) resin.

6 is a view for explaining the principle of operation of the material supply unit shown in FIG.

Referring to FIG. 6, the material supply unit 150, that is, the first material supply unit 151 and the second material supply unit 152, according to an embodiment of the present invention, respectively, is a material supply reel 153 and a material feeding unit 154. ) May be included.

The material supply reel 153 is wound around the filament-shaped material, and the material feeding part 154 is implemented by two gears, and the two gears rotate to press the filament-shaped material to the dual printing nozzle unit 140. Can supply In this case, the present invention has been described as an example of implementing the material feeding unit 152 with two gears, but is not necessarily limited thereto and may be implemented in various forms.

At this time, between the material supply unit 150 and the dual printing nozzle unit 140, that is, between the material supply unit 150 and the first printing nozzle unit 141, between the material supply unit 150 and the second printing nozzle unit 142. A filament guide portion for transferring the filamentary material may be disposed.

The adhesive output unit 160 is spaced apart from the dual printing nozzle unit 140 by a predetermined distance and driven independently, and may be moved in the same direction as the moving direction of the dual printing nozzle unit 140. The adhesive output unit 160 outputs the first material when the first printing nozzle unit 141 of the dual printing nozzle unit 140 outputs the first material or the second printing nozzle unit 142 outputs the second material. An adhesive can be output to the top or side surface of a 1st material or a 2nd material. Here, the adhesive output unit 160 will be described as an example of spraying the adhesive.

The adhesive output unit 160 may have a different output form according to the type, volume, and the like of the adhesive. For example, the adhesive output unit 160 may be implemented as an injector capable of injecting an adhesive or a nozzle capable of ejecting an adhesive.

The adhesive supply unit 170 may supply the adhesive to the adhesive output unit 160. The adhesive supplier 170 may supply the adhesive to the adhesive output unit 160 using pressure. The adhesive uses two materials, that is, the adhesive strength is good with the first material and the second material, and the adhesive force between the materials has more than the strength of the weak material among the two materials.

In this case, an adhesive guide unit, for example, an adhesive guide tube, may be disposed between the adhesive supply unit 170 and the adhesive output unit 160 to transfer the adhesive.

The controller 180 receives the 3D model and divides the same into a plurality of layers, and drives the first printing nozzle unit 141 and the second printing nozzle unit 142 alternately each time each layer is formed. Each time the first printing nozzle unit 141 or the second printing nozzle unit 142 is driven, the adhesive output unit 160 is sequentially driven to form a layer made of at least one of the first material and the second material. By repeating the process a plurality of times, it is possible to control to produce a sculpture of a 3D model in which a plurality of layers are finally stacked.

7 is a view showing a method of driving a 3D printer according to an embodiment of the present invention.

Referring to FIG. 7, a driving method of a 3D printer according to an exemplary embodiment of the present invention includes a 3D model input step S710, a material discharge step S720, an adhesive output step S730, and a sculpture completion step S740. can do.

In step 3710 of inputting the 3D model, when the controller 180 receives an input of the 3D model, the controller 180 may divide the input 3D model into N layers to obtain information about each layer, for example, cross-sectional information.

At this time, the controller 180 sets the variable i = 1 representing the number of divided floors and performs the next step. Where the number of floors i = 1 at the bottom of the 3D model is i = 1.

In the material discharging step (S720), the controller 180 may discharge the first material by driving the first printing nozzle unit based on the obtained information on each layer, or discharge the second material by driving the second printing nozzle unit. have. In this case, the controller 180 may alternately drive the first printing nozzle unit and the second printing nozzle unit to discharge the first material or the second material.

In the adhesive output operation S730, the controller 180 drives the second printing nozzle part immediately after the first printing nozzle part is driven or does not directly drive the first printing nozzle part after the second printing nozzle part is driven, Before driving the printing nozzle unit or the first printing nozzle unit, the adhesive output unit may be driven to output and apply an adhesive having a predetermined adhesive force to the upper side or the side surface of the first material or the second material.

In this case, one layer may be made of only one material or may be made of a plurality of materials. That is, one layer may be formed of only the first material or the second material or may be formed by alternately stacking the first material and the second material at least once in the vertical direction or the horizontal direction.

8 is a view for explaining the principle of material stacking according to an embodiment of the present invention.

Referring to FIG. 8, a laminated structure consisting of five layers L1, L2, L3, L4, and L5 is shown. Among the five L1, L2, L3, L4, and L5, L1, L3, and L5 layers are formed of two materials ( It can be seen that 10 and 20 are alternately stacked, and the L2 and L4 layers are formed of only one material 20.

Therefore, the controller 180 determines whether the layer i is completed after the first material or the second material is discharged, and if the layer i is not completed, the controller 180 outputs the adhesive and then performs the material discharge step again.

On the other hand, if it is determined that the corresponding floor is completed, the controller 180 determines whether the variable i = N representing the number of divided floors is determined, and if the variable i = N, the controller 180 determines that all the floors are completed. It is judged that the layer is not completed, the variable i is increased by 1, the adhesive is output, and then the material discharge step is performed again.

At this time, when the adhesive does not spread widely and has a volume, a gap may be arbitrarily made between the two materials. For example, when the thickness of the adhesive is set to a, the controller 180 drives the first printing nozzle unit and the second printing nozzle unit to reduce and output the thickness of the first material and the thickness of the second material by a / 2. Can be controlled.

In the completed sculpture step S740, when the controller 180 determines that all the layers are completed, the controller 180 may complete the sculpture of the 3D model in which the plurality of layers are finally stacked.

That is, in the present invention, the first printing nozzle unit and the second printing nozzle unit are alternately driven, and each time the first printing nozzle unit or the second printing nozzle unit is driven, the adhesive output unit is sequentially driven to thereby drive the first material and the second material. After completing one layer of at least one of the materials, the printing bed is lowered in the vertical direction to output the next layer, and the process is successively repeated to form all the divided layers, thereby finally completing the 3D model sculpture. can do. Therefore, the controller 180 may end all processes as the sculpture of the 3D model is completed.

As such, in the present invention, not only the adhesive force between the two materials can be strongly implemented using the adhesive, but also the filler can be filled with various kinds of adhesives, so that the adhesive force between the two materials can be realized as the manufacturer wants.

Features, structures, effects, etc. described in the above embodiments are included in one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be interpreted that the contents related to such a combination and modification are included in the scope of the present invention.

In addition, the above description has been made with reference to the embodiment, which is merely an example, and is not intended to limit the present invention. Those skilled in the art to which the present invention pertains may have illustrated the above without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to these modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

110: frame
120: printing bed
121: bed transfer unit
130: transfer unit
140: dual printing nozzle unit
141: first printing nozzle
142: second printing nozzle
143: nozzle drive unit
150: material supply unit
160: adhesive output unit
170: adhesive supply
180: control unit

Claims (12)

Printing bed;
A first printing nozzle unit for discharging a first material on the printing bed;
A second printing nozzle unit for discharging a second material on the printing bed;
An adhesive output unit configured to output and apply an adhesive having a predetermined adhesive force to an upper side or a side surface of the discharged first material or the second material; And
The first printing nozzle unit and the second printing nozzle unit are alternately driven, and the adhesive output unit is sequentially driven every time the first printing nozzle unit or the second printing nozzle unit is driven, thereby the first material and the first agent. And a controller which controls a plurality of layers of at least one of two materials to be laminated by adhesively bonding to form a 3D model sculpture on the printing bed. The method of claim 1,
And the adhesive output portion is an injector for injecting adhesive onto the top or side of the first material or the second material. The method of claim 1,
And the adhesive output portion is a nozzle for discharging the adhesive to the top or the side of the first material or the second material. The method of claim 1,
The control unit,
When the thickness of the adhesive to be formed through the adhesive output unit is set to a, the first printing nozzle unit and the second printing to reduce and discharge each of the thickness of the first material and the thickness of the second material by a / 2. 3D printer which controls the drive of a nozzle part. The method of claim 1,
And the first printing nozzle portion and the second printing nozzle portion are arranged side by side, move together, and are driven to discharge any one of the first material and the second material. The method of claim 1,
And a transfer unit configured to move the first printing nozzle unit, the adhesive output unit, and the second printing nozzle unit in a first axis direction and a second axis direction perpendicular to each other on the same horizontal plane. The method of claim 1,
A nozzle driving unit connected to the first printing nozzle unit and the second printing nozzle unit and moving one of the first printing nozzle unit and the second printing nozzle unit to output material in a vertical direction with respect to the printing bed. Further comprising; a 3D printer. The method of claim 1,
The bed transfer unit for moving the printing bed in the vertical direction; further comprising, 3D printer. The method of claim 1,
When the layer is formed of two materials, the first material and the second material, the first material and the second material are formed by alternately stacking at least one or more times in a vertical direction or a horizontal direction. . Receiving a 3D model, dividing the 3D model into a plurality of layers to obtain information about each layer;
A material discharging step of discharging a first material or a second material based on the obtained information on each layer;
An adhesive output step of outputting and applying an adhesive having a predetermined adhesive force to an upper side or a side surface of the first material or the second material; And
Repeating the material discharging step and the adhesive output step to complete a sculpture of the 3D model by laminating a plurality of layers of the first material and at least one of the second material in a bonding manner A driving method of a 3D printer comprising a. The method of claim 10,
In the adhesive output step, the adhesive is sprayed and applied to the upper side or the side of the first material or the second material by using an injector. The method of claim 10,
In the adhesive output step, the adhesive is discharged and applied to the upper side or the side of the first material or the second material by using a nozzle.

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