JP2020199724A - Shaping method and shaping apparatus - Google Patents

Abstract

To provide a shaping method capable of easily and efficiently removing a poorly shaped protrusion.SOLUTION: A method of shaping a three-dimensional object by repeating lamination of a shaping layer with a shaping material on a shaping stage, the method comprising: a layer shaping step of ejecting the shaping material from a nozzle to shape the shaping layer on the shaping stage; and a cutting step of cutting a poorly shaped protrusion formed on the shaping layer in the layer shaping step, while tilting at least one of the nozzle and the shaping stage.SELECTED DRAWING: Figure 1

Description

The present invention relates to a modeling method and a modeling apparatus.

In recent years, a modeling device called a 3D (3-Dimensional) printer has become widespread as a device for modeling a three-dimensional model without using a mold or the like.

As such a modeling device, for example, a device for discharging a modeling material from a nozzle is known (see, for example, Patent Document 1).

An object of the present invention is to provide a modeling method capable of easily and efficiently removing a molding defective protrusion.

The modeling method of the present invention as a means for solving the above-mentioned problems is a modeling method for modeling a three-dimensional model by repeating stacking of modeling layers with a modeling material on a modeling stage, and the modeling material is used. At least one of the nozzle and the modeling stage is tilted at least in the layer modeling step in which the modeling layer is formed on the modeling stage by discharging from the nozzle and the molding defect protrusion formed in the modeling layer in the layer modeling process. Includes a cutting step of cutting.

According to the present invention, it is possible to provide a molding method capable of easily and efficiently removing a molding defective protrusion.

FIG. 1 is a schematic view showing an embodiment of the modeling apparatus of the present invention. FIG. 2 is a schematic view showing an example of how the layer forming means forms a forming layer. FIG. 3A is a schematic view showing an example of a state in which stringing of a modeling material occurs in a conventional modeling apparatus. FIG. 3B is a schematic view showing an example of a state in which the modeling material is solidified while being stringed in the conventional modeling apparatus. FIG. 4A is a schematic view showing a state in which the nozzle is tilted after discharging the modeling material in the modeling apparatus according to the embodiment of the present invention. FIG. 4B is a schematic view showing a state in which the tilted nozzle is returned in the modeling apparatus according to the embodiment of the present invention. FIG. 5A is a schematic view showing a state in which the modeling stage is tilted after discharging the modeling material in the modeling apparatus according to the embodiment of the present invention. FIG. 5B is a schematic view showing a state in which the tilted modeling stage is returned in the modeling apparatus according to the embodiment of the present invention.

(Modeling method and modeling equipment)
The modeling method of the present invention is a modeling method for modeling a three-dimensional model by repeating stacking of modeling layers with a modeling material on a modeling stage, and the modeling material is discharged from a nozzle to model the modeling layer on the modeling stage. Includes a layer forming step of cutting, and a cutting step of cutting the defectively formed protrusion formed on the forming layer in the layer forming step by tilting at least one of the nozzle and the forming stage, and further, if necessary, other Includes steps.
The modeling device of the present invention is a modeling device that creates a three-dimensional model by repeating stacking of modeling layers with a modeling material on the modeling stage, and discharges the modeling material from a nozzle to model the modeling layer on the modeling stage. It has a layer forming means for cutting, and a cutting means for cutting a poorly formed protruding portion formed on the forming layer by the layer forming means by tilting at least one of a nozzle and the forming stage, and further, if necessary, other Has the means of.
The modeling method of the present invention can be suitably performed by the modeling apparatus of the present invention, the layer modeling step can be preferably performed by the layer modeling means, the cutting step can be preferably performed by the cutting means, and other steps. Can be done by other means.

Here, the "improperly shaped protruding part" is a part that is unnecessary for a three-dimensional modeled product that is a finished product, and is unintentionally caused by, for example, "threading" (a state in which a thread is stretched). It means the part formed by protruding. The "modeling layer" means a single layer, the "modeling object" means an aggregate of a plurality of modeling layers, and the "three-dimensional modeled object" means a finished product.

In the modeling method of modeling a three-dimensional model by repeating the lamination of the model layer with the model material on the model stage, after the model layer is modeled, the discharge of the model material is stopped and the nozzle is moved each time. Stringing of the modeling material may occur from the modeling layer. When stringing occurs from the modeling layer, the stringing portion of the modeling layer, that is, the protruding portion with defective modeling becomes burrs, and the work of removing the burrs from the three-dimensional modeled object occurs. The technique described in Patent Document 1 in which a valve is provided inside the nozzle for the purpose of preventing the generation of burrs has the following problems.

Specifically, even if a valve is provided inside the nozzle as in the technique described in Patent Document 1, the modeling material at the tip of the nozzle located downstream of the valve and the modeling material discharged to the modeling stage cannot be cut. There is a problem that it is not effective for molding defects caused by stringing or the like. In addition, when a resin such as super engineering plastic that melts at high viscosity and high viscosity is used as the modeling material, rubber or the like cannot be used for the valve sealing portion (crimping portion), and it is difficult to make the valve function. There's a problem. In addition, if the modeling material enters the moving part of the valve and the modeling material staying in the nozzle deteriorates due to carbonization or scorching at a high temperature, the movement of the valve may be hindered, and the altered modeling material is discharged. There is a problem that the quality of the three-dimensional model is deteriorated.

Therefore, in the modeling method of the present invention, after the modeling layer is modeled on the modeling stage, at least one of the nozzle and the modeling stage is tilted to cut the molding defective protrusion generated by stringing or the like. As a result, in the modeling method of the present invention, even a modeling material that melts at high temperature and high viscosity, such as super engineering plastic, can be cut by adhering a molding defect protrusion to the tip of the nozzle, so that it is easy and efficient. Molding defects The protruding parts can be removed.
In the following, super engineering plastics may be referred to as "super engineering plastics".

<Layer molding process and layer molding means>
The layer modeling process is a process of ejecting a modeling material from a nozzle to form a modeling layer on a modeling stage.
The layer modeling means is a means for ejecting a modeling material from a nozzle to form a modeling layer on a modeling stage.
Specifically, the layer modeling process and the layer modeling means discharge the modeling material from the nozzle to form the modeling layer on the modeling stage so as to form the cross section of the three-dimensional model based on the slice data of the three-dimensional model. To do.
The slice data of the three-dimensional model is processed based on the 3D data of the three-dimensional model, and means coordinate data indicating a location where the modeling material is discharged for each modeling layer.

The layer forming means is not particularly limited as long as it has a nozzle for discharging the forming material, and can be selected according to the purpose.
Examples of the layer forming means include a discharge module (head) in which a filament-shaped modeling material is melted and fluidized, and the modeling material is discharged from a nozzle.
The shape, structure, size, and material of the layer forming means are not particularly limited and may be appropriately selected according to the purpose, and a plurality of may be provided in the forming apparatus, and a plurality of layers may be provided in one layer forming means. Nozzles may be arranged.

<< Nozzle >>
The shape, structure, size, and material of the nozzle are not particularly limited as long as they can discharge the modeling material, and can be appropriately selected according to the purpose.
The shape of the discharge port of the nozzle is not particularly limited and may be appropriately selected depending on the intended purpose, but it is preferably substantially circular.
The diameter of the discharge port of the nozzle is not particularly limited and can be appropriately selected according to the purpose, and can be changed according to the quality such as the shape material to be discharged and the smoothness and resolution of the three-dimensional model. Here, the diameter of the discharge port means the diameter of the discharge port when the shape of the discharge port is substantially circular. When the shape of the discharge port is substantially circular, the diameter of the discharge port of the nozzle is preferably 0.1 mm or more and 20 mm or less, more preferably 0.3 mm or more and 5 mm or less, and 0.3 mm or more and 0.6 mm or less. More preferred.

<< Modeling material >>
The modeling material is not particularly limited and can be selected according to the intended purpose. Examples thereof include thermoplastic resin, glass and metal. These may be used alone or in combination of two or more. Among these, a thermoplastic resin is preferable.
Further, the modeling material may be divided into a model material that serves as a model portion that is a portion having a desired shape in the three-dimensional modeled object and a support material that serves as a support portion that supports the model portion. Moreover, each modeling material may be discharged from another nozzle of the layer forming means. The model material and the support material may use the same modeling material or different modeling materials.

-Thermoplastic resin-
Thermoplastic resin means a resin that plasticizes and melts when heat is applied.
The thermoplastic resin is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include crystalline resin, non-crystalline resin and liquid crystal resin. Among these, select from polyphthalamide, polyphenylene sulfide, liquid crystal polymer, polysulfone, polyethersulfone, polyetherimide, polyamideimide, polyetheretherketone, and polytetrafluoroethylene, which are called "super engineering plastics". It is preferable that the amount is at least one. When the thermoplastic resin is super engineering plastic, the tensile strength, heat resistance, chemical resistance, and flame retardancy of the three-dimensional model to be modeled can be improved, and the three-dimensional model can be used for industrial purposes. Is advantageous.

The shape of the molding material to be supplied to the layer molding means is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a filament shape.

<< Modeling stage >>
The modeling stage is a base on which the layer modeling means can discharge the modeling material, and there is no particular limitation as long as the modeling layers can be laminated, and it can be appropriately selected according to the purpose.
The shape of the modeling stage is not particularly limited and may be appropriately selected depending on the intended purpose, but it is preferably flat. At this time, the normal direction of the modeling stage is not particularly limited and may be appropriately selected depending on the intended purpose, but the direction in which the layer modeling means discharges the modeling material is preferable.
The structure, size, and material of the modeling stage are not particularly limited and can be appropriately selected according to the purpose.

The gap between the modeling stage or the modeling layer and the nozzle when the modeling material is discharged from the nozzle is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 0.1 mm or more and 0.4 mm or less. .. In this case, the gap is often narrower than the diameter of the discharge port of the nozzle, which is advantageous in that the adhesive force of the discharged modeling material to the modeling stage or the modeling layer can be enhanced.

<< Other Department >>
The other parts are not particularly limited and may be appropriately selected depending on the purpose, but a backflow suppressing part that suppresses the backflow of the supplied modeling material and a fluidization part that fluidizes the supplied modeling material. It is preferable to have.

-Backflow suppression unit-
The backflow suppressing unit suppresses the backflow of the modeling material in the layered modeling means by cooling the modeling material. As a result, the backflow suppressing unit can suppress ejection defects due to clogging of the modeling material in the layered modeling means.
The backflow suppressing unit is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a known cooling device.
The amount of backflow of the modeling material in the layered modeling means can be controlled by the temperature distribution of the backflow suppressing portion, the shape of the flow path of the layered modeling means, and the like.

The timing at which the backflow suppression unit operates is not particularly limited and can be appropriately selected according to the purpose. The layer forming means may always operate when discharging the modeling material, or the layer forming means may operate. It may operate when moving away from the stage. Further, when the layer forming means moves away from the forming stage, the backflow suppressing portion may make the cooling of the forming material stronger. This makes it possible to more reliably suppress the backflow of the modeling material when moving away from the modeling stage (such as when the layer modeling means is retracted during modeling).

-Fluidization section-
Examples of the fluidized portion include a known heat source capable of melting the thermoplastic resin if the modeling material is a thermoplastic resin.

Further, it is preferable that the cutting means tilts the nozzle so as not to obstruct the supply of the molding material to the layer molding means. As a result, even if the cutting means tilts the nozzle, the modeling material can be smoothly supplied to the layered modeling means.

<Cutting process and cutting means>
The cutting step is a step of inclining at least one of a nozzle and a molding stage to cut a molding defective protrusion formed on the molding layer in the layer molding step.
The cutting means is a means for cutting a molding defective protrusion formed in the molding layer by the layer molding means by tilting at least one of a nozzle and a molding stage.
In addition, tilting the modeling stage has the same meaning as tilting the modeling layer or the modeled object on the modeling stage, and when a modeling defect protrusion is formed on the modeling layer laminated on the modeled object, the modeling stage By tilting, the protruding portion with poor modeling can be cut.

As the cutting means, it is preferable to tilt at least one of the nozzle and the modeling stage so that the tip of the nozzle comes into contact with the poorly shaped protrusion and the poorly shaped protrusion is cut.
Here, the "tip of the nozzle" means a discharge surface and a side surface at the tip of the nozzle. The “nozzle discharge surface” means a surface including the nozzle discharge port.

The shape, structure, size, and material of the cutting means are not particularly limited as long as at least one of the nozzle and the modeling stage can be tilted to cut the defectively formed protrusion of the modeling layer, and can be appropriately selected according to the purpose. ..
The cutting means is not particularly limited and may be appropriately selected depending on the intended purpose, but a nozzle tilting mechanism or a tilting adjusting mechanism is preferable.

-Nozzle tilt mechanism-
The nozzle tilting mechanism is a mechanism capable of tilting the nozzle, and when the layer forming means integrates the nozzle, the layer forming means can be tilted.
The nozzle tilting mechanism is not particularly limited and may be appropriately selected depending on the intended purpose, but it is preferable to have a drive source such as a motor for tilting the nozzle and a movable portion serving as a movable axis of the nozzle. ..
As the movable portion, a movable portion by a ball joint or a biaxial movable portion is preferable. This is advantageous in that the nozzle tilting mechanism does not limit the direction in which the nozzle is tilted.
The installation position of the movable portion is not particularly limited and may be appropriately selected depending on the purpose, but it is preferably located above the nozzle. When the movable part is located above the nozzle, the position of the nozzle insertion port for supplying the filament-shaped modeling material is less likely to move before and after tilting the nozzle, so that the filament-shaped modeling material is smoothly supplied to the nozzle. can do.

-Inclination adjustment mechanism-
The tilt adjusting mechanism is a means for adjusting the tilt of the modeling stage.
The inclination adjusting mechanism is not particularly limited and can be appropriately selected depending on the intended purpose. For example, a mechanism capable of adjusting the heights of the four corners of a modeling stage which is a quadrangle when viewed in a plan view can be mentioned.

<Other processes and other means>
The other steps are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a cooling step, a cleaning step, and a control step.
The other means are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include cooling means, cleaning means, and control means.
The cooling step can be preferably performed by the cooling means, the cleaning step can be preferably performed by the cleaning means, and the control step can be preferably performed by the control means.

<< Cooling process and cooling means >>
The cooling step is a step of cooling the molding material discharged from the molding material in the layer molding step. As a result, in the cooling step, the viscosity can be reduced by lowering the temperature of the modeling material, so that stringing of the modeling material can be made less likely to occur.
The cooling means is a means for cooling the molding material discharged by the layer molding means.
Examples of the cooling means include a blowing means for blowing air to the molding material discharged by the layer molding means, a contact means for directly contacting a material having good thermal conductivity, a heat pipe, and the like for cooling.

<< Cleaning process and cleaning means >>
The cleaning step is a step of cleaning the tip of the nozzle. As a result, since the tip of the nozzle can be cleaned, it is possible to prevent the modeling material attached to the tip of the nozzle from adhering to the modeling layer, the modeled object, or the three-dimensional modeled object, and the quality of the three-dimensional modeled object can be maintained.
The cleaning means is a means for cleaning the tip of the nozzle.
Examples of the cleaning means include a wiping means in which the tip of the nozzle is moved to a fixed metal plate, a brush, or the like to wipe the nozzle.

<< Control process and control means >>
The control process is a process of executing various programs and controlling the operation of the entire modeling apparatus.
The control means is a means for executing various programs and controlling the operation of the entire modeling apparatus.
The control means is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a CPU (Central Processing Unit) and an FPGA (Field Programmable Gate Array).

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As an embodiment of the present invention, a three-dimensional modeling apparatus for modeling a three-dimensional model by a fused deposition modeling (FFF) method will be described. The modeling apparatus in the present invention is not limited to the one using the Fused Deposition Modeling method, and any method for modeling a three-dimensional model by ejecting a modeling material from a nozzle and laminating a modeling layer on a modeling stage. The modeling device of can be used.

FIG. 1 is a schematic view showing an embodiment of the modeling apparatus of the present invention.
As shown in FIG. 1, the modeling apparatus 1 includes an extruder 10, a discharge module 20 as a layer modeling means, a movable shaft 31 as a movable portion of a nozzle tilting mechanism (cutting means), and a modeling stage 40. The filament-shaped modeling material F as the modeling material is a string-shaped solid material composed of a resin composition having a thermoplastic resin as a matrix, and is supplied to the discharge module 20 by being drawn by the extruder 10.

The extruder 10 has feed rollers 11 and 12 and a motor 13. The feed rollers 11 and 12 are driven by the motor 13 to sandwich the modeling material F and supply it to the discharge module 20.
In this embodiment, the extruder 10 is fixed so as not to be tilted integrally with the discharge module 20.

The discharge module 20 receives the modeling material F supplied from the extruder 10 at the upper opening, melts the modeling material F through the internal transfer path 20a, and discharges the modeling material so as not to flow back.
The discharge module 20 has a cooling block 21 as a backflow suppression unit, a guide 22, a heating block 23 as a fluidization unit, and a nozzle 24.

The cooling block 21 is provided at the uppermost portion of the discharge module 20 and has a cooling source for cooling the modeling material F. As a result, the cooling block 21 prevents backflow of the modeling material to the upper portion of the discharge module 20, an increase in resistance for pushing out the modeling material, or clogging in the transfer path 20a due to solidification of the modeling material.
A guide 22 is provided between the heating block 23 and the cooling block 21.

The heating block 23 is arranged downstream of the guide 22 in the transfer direction of the modeling material, and has a heat source such as a heater and a thermocouple for controlling the temperature of the heater. The heating block 23 heats and melts the modeling material F transferred via the guide 22 and supplies it to the nozzle 24.

The nozzle 24 is provided at the lowermost part of the discharge module 20, and the lower surface thereof is a discharge surface 24a including a discharge port. The nozzle 24 discharges the molten or semi-molten modeling material supplied from the heating block 23 so as to be linearly extruded onto the modeling stage 40. The discharged modeling material is cooled and solidified to form a modeling layer having a predetermined shape. Further, the nozzle 24 stacks a new modeling layer on the modeling layer by repeating the operation of ejecting the molten or semi-melted modeling material in a linear manner. In this way, the modeling device 1 models a three-dimensional modeled object.

The movable shaft 31 as a movable portion of the nozzle tilting mechanism is arranged above the discharge module 20. As a result, since the positions of the movable shaft 31 and the opening of the discharge module 20 are close to each other, the position of the opening does not move significantly even if the discharge module 20 is tilted, so that the modeling material F is supplied from the extruder 10. The nozzle 24 can be tilted so as not to hinder. Further, the nozzle tilting mechanism can tilt the discharge module 20 (including the nozzle 24) around the movable shaft 31 in the direction shown by R1 in FIG. 1 by a driving force from a motor or the like to which a driving pulse signal is input.

The discharge module 20 can rotate independently of the extruder 10 in the direction shown by R2 in FIG. 1 with the axis (transfer path 20a) of the modeling material F supplied from the extruder 10 as the rotation axis. This is because the extruder 10 sandwiches the modeling material F, so if the modeling material F also moves when it is rotated or the like integrally with the discharge module 20, the modeling material F will be supplied depending on the arrangement and structure. May interfere. Therefore, by allowing the discharge module 20 to rotate independently of the fixed extruder 10, the supply of the modeling material F from the extruder 10 can be prevented from being obstructed. Further, since the discharge module 20 can rotate in the direction R2, the tip of the nozzle 24 to which the modeling material with the thread is attached can be made the same, so that the part to be cleaned by the cleaning means can be limited to a part of the nozzle 24 for cleaning. Becomes easier.

In the present embodiment, the extruder 10 is prevented from tilting and rotating, but the present invention is not limited to this, and the extruder 10 may be tilted and rotated. In this case, it should be noted that the tilt and rotation of the extruder 10 do not interfere with the supply of the modeling material F.
Further, whether or not the discharge module 20 is tilted may be determined based on, for example, the material and temperature of the modeling material F. As a control method for tilting the discharge module 20, for example, when a retract command for retracting the discharge module 20 to the outside of the modeling stage 40 is input, the direction and tilt amount of the nozzle 24 are tilted based on the immediately preceding discharge direction and / or scanning direction. May be calculated and tilted. Alternatively, the direction and amount of inclination of the nozzle 24 may be calculated and tilted based on the 3D data of the three-dimensional model.

FIG. 2 is a schematic view showing an example of how the layer forming means forms a forming layer.
As shown in FIG. 2, the nozzle 24 forms the modeling layer L by scanning while discharging the modeling material FM toward the modeling stage 40 side. When the modeling material FM is discharged in this way, the discharged modeling material FM is formed into a single line along the movement of the nozzle 24. Further, the nozzle 24 discharges the modeling material FM and presses it onto the modeling stage 40 to form the modeling layer L. As a result, the adhesive force between the modeling stage 40 and the modeling layer L or the adhesive force between the modeling layers L can be improved, and the peeling of the modeling layer L can be suppressed.
In FIG. 2, the modeling material FM is discharged onto the modeling stage 40, but when modeling a modeled object, the modeling material FM is discharged onto the modeling layer L to stack the modeling layers.

Next, in the conventional modeling apparatus, the appearance of stringing of the modeling material will be described with reference to FIGS. 3A and 3B.

FIG. 3A is a schematic view showing an example of a state in which stringing of a modeling material occurs in a conventional modeling apparatus. FIG. 3B is a schematic view showing an example of a state in which the modeling material is solidified while being stringed in the conventional modeling apparatus.
In FIG. 3A, the nozzle 24 starts ejecting the modeling material FM and stops the ejection at the ejection stop position E while pressing the modeling material FM against the modeling stage 40 to perform the retract operation, and then the nozzle 24 starts to move toward the next operation. .. At this time, the nozzle 24 is located on the right side in FIG. 3A with respect to the discharge stop position E, and the modeling material FM is discharged from the nozzle 24 even after the discharge is stopped, and stringing occurs. FIG. 3B shows a state in which the nozzle 24 is further moved to the right side in FIG. 3A as compared with the state shown in FIG. 3A. Therefore, the stringing shape of the modeling material FM remains as it is at the end of the modeling layer L (the stringing portion shown by S in FIG. 3B), and when this solidifies, it becomes a burr.
As described above, since there is no process of separating the modeling layer L and the modeling material FM remaining in the nozzle 24, stringing of the modeling material FM occurs, and the thread of the modeling material FM remaining at the end of the modeling layer L. The pull shape becomes a burr.

FIG. 4A is a schematic view showing a state in which the nozzle 24 is tilted after discharging the modeling material in the modeling apparatus according to the embodiment of the present invention. FIG. 4B is a schematic view showing a state in which the tilted nozzle 24 is returned in the modeling apparatus according to the embodiment of the present invention.
As shown in FIGS. 4A and 4B, in the modeling apparatus according to the embodiment of the present invention, the threading portion S shown in FIGS. 3A and 3B is tilted by tilting the nozzle 24 in the direction shown by R1 in FIG. 4A. It can be attached to the tip of the nozzle 24. Therefore, in the modeling apparatus according to the embodiment of the present invention, the stringing portion S can be easily and efficiently removed.
A cleaning means or the like may be provided so that the modeling material FM attached to the tip of the nozzle 24 does not stain the modeling layer, the modeled object, the three-dimensional modeled object, or the inside of the device.

In the present embodiment, the nozzle 24 is tilted in order to easily and efficiently remove the stringing portion S, but the present invention is not limited to this. For example, at the discharge stop position E, the discharge is stopped and the retract operation is executed, and at the same time, the gap between the nozzle 24 and the modeling stage 40 is widened (the operation of relatively raising the nozzle 24), the nozzle 24 is rotated, and then the gap is reopened. It may be narrowed to cut the string of the modeling material FM. Alternatively, the stringing of the modeling material FM may be cut by rotating the nozzle 24 in the direction shown by R2 in FIG. 1, or the nozzle 24 may be cut by the linear motion after the rotation. In this case, as the linear operation, it may move from the upper side to the lower side, or may move to the left or right. Further, the rotational operation and the linear operation of the nozzle 24 may be combined. As the timing of cutting, the machine may be cut immediately after the discharge is stopped at the discharge stop position E, or may be cut after a cooling time by the cooling means is provided.

Further, in the present embodiment, the nozzle 24 is tilted in order to easily and efficiently remove the protruding portion of the molding defect, but the present invention is not limited to this. For example, after discharging the modeling material F, the modeling stage 40 may be tilted by the tilt adjusting mechanism as shown in FIG. 5A to cut the stringing of the modeling material as shown in FIG. 5B.

As described above, the modeling method of the present invention is a modeling method for modeling a three-dimensional model by repeating stacking of modeling layers with a modeling material on a modeling stage, and the modeling material is discharged from a nozzle for modeling. It includes a layer modeling step of modeling a layer on a modeling stage, and a cutting step of cutting a molding defective protrusion formed on the modeling layer in the layer modeling process by tilting at least one of a nozzle and a modeling stage.
As a result, the modeling method of the present invention can easily and efficiently remove the projecting defect.

Aspects of the present invention are, for example, as follows.
<1> A modeling method for modeling a three-dimensional model by repeating stacking of modeling layers with a modeling material on a modeling stage.
A layer modeling process in which the modeling material is discharged from a nozzle to form the modeling layer on the modeling stage.
A cutting step in which at least one of the nozzle and the molding stage is tilted to cut a molding defective protrusion formed in the molding layer in the layer molding step.
It is a modeling method characterized by including.
<2> The modeling method according to <1>, wherein at least one of the nozzle and the modeling stage is tilted so that the tip of the nozzle abuts on the defective molding projecting portion and the defective modeling projecting portion is cut. Is.
<3> The modeling method according to any one of <1> to <2>, wherein the nozzle is tilted by a nozzle tilting mechanism capable of tilting the nozzle.
<4> The molding material is at least one selected from polyphthalamide, polyphenylene sulfide, liquid crystal polymer, polysulfone, polyether sulfone, polyetherimide, polyamideimide, polyetheretherketone and polytetrafluoroethylene. The modeling method according to any one of <1> to <3>.
<5> The molding method according to any one of <1> to <4>, further including a cooling step of cooling the molding material discharged in the layer molding step.
<6> A modeling device that creates a three-dimensional model by repeating stacking of modeling layers with a modeling material on the modeling stage.
A layer forming means for ejecting the modeling material from a nozzle to form the modeling layer on the modeling stage, and
A cutting means for cutting at least one of the nozzle and the modeling stage by tilting the molding defective protrusion formed on the modeling layer by the layer modeling means.
It is a modeling device characterized by having.
<7> The cutting means is a nozzle tilting mechanism capable of tilting the nozzle.
The modeling device according to <6>, wherein the nozzle tilting mechanism has a movable portion by a ball joint or a biaxial movable portion.
<8> The modeling apparatus according to <7>, wherein the nozzle tilting mechanism tilts the nozzle so as not to obstruct the supply of the modeling material to the layered modeling means.
<9> The modeling device according to any one of <7> to <8>, wherein the movable portion is located above the nozzle.
<10> The modeling apparatus according to any one of <6> to <9>, further comprising a cooling means for cooling the modeling material discharged by the layer modeling means.

According to the modeling method according to any one of <1> to <5> and the modeling apparatus according to any one of <6> to <10>, the conventional problems are solved and the object of the present invention is achieved. Can be achieved.

Japanese Unexamined Patent Publication No. 2018-154061

1 Modeling device 10 Extruder 20 Discharge module (layer modeling means)
20a Transfer path 21 Cooling block 23 Heating block 24 Nozzle 24a Discharge surface 31 Movable shaft (movable part)
40 Modeling stage E Discharge stop position F Modeling material FM Modeling material L Modeling layer S Threading part (protruding part with defective modeling)

Claims (10)

It is a modeling method that creates a three-dimensional model by repeating the lamination of the modeling layer with the modeling material on the modeling stage.
A layer modeling process in which the modeling material is discharged from a nozzle to form the modeling layer on the modeling stage.
A cutting step in which at least one of the nozzle and the molding stage is tilted to cut a molding defective protrusion formed in the molding layer in the layer molding step.
A modeling method characterized by including. The modeling method according to claim 1, wherein at least one of the nozzle and the modeling stage is tilted so that the tip of the nozzle abuts on the defective modeling protrusion to cut the defective modeling project. The modeling method according to any one of claims 1 to 2, wherein the nozzle is tilted by a nozzle tilting mechanism capable of tilting the nozzle. Claim 1 in which the modeling material is at least one selected from polyphthalamide, polyphenylene sulfide, liquid crystal polymer, polysulfone, polyether sulfone, polyetherimide, polyamideimide, polyetheretherketone and polytetrafluoroethylene. The modeling method according to any one of 3 to 3. The molding method according to any one of claims 1 to 4, further comprising a cooling step of cooling the molding material discharged in the layer molding step. It is a modeling device that models a three-dimensional model by repeating the lamination of modeling layers with the modeling material on the modeling stage.
A layer forming means for ejecting the modeling material from a nozzle to form the modeling layer on the modeling stage, and
A cutting means for cutting at least one of the nozzle and the modeling stage by tilting the molding defective protrusion formed on the modeling layer by the layer modeling means.
A modeling device characterized by having. The cutting means is a nozzle tilting mechanism capable of tilting the nozzle.
The modeling device according to claim 6, wherein the nozzle tilting mechanism has a movable portion by a ball joint or a biaxial movable portion. The modeling apparatus according to claim 7, wherein the nozzle tilting mechanism tilts the nozzle so as not to interfere with the supply of the modeling material to the layer modeling means. The modeling apparatus according to any one of claims 7 to 8, wherein the movable portion is located above the nozzle. The modeling apparatus according to any one of claims 6 to 9, further comprising a cooling means for cooling the modeling material discharged by the layer modeling means.

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