JP2020142438A - Molding method, molding apparatus and molding program - Google Patents

Abstract

To provide a molding method, a molding apparatus, and a molding program capable of maintaining a molding quality while stabilizing a meniscus in discharging means.SOLUTION: In a molding method of the present invention, a waste molding layer is formed before and after a molding layer is formed, and the waste molding layer before molding an outbound molding layer and the waste molding layer before molding an inbound molding layer are molded by ejecting a molding material with a first pulse. And, the waste molding layer after molding the outbound molding layer and the waste molding layer after molding the inbound molding layer are molded by ejecting the molding material with a second pulse.SELECTED DRAWING: Figure 1

Description

The present invention relates to a modeling method, a modeling device and a modeling program.

Conventionally, when a 3D object is formed by ejecting and laminating a modeling material into the cross-sectional shape of the 3D data based on the 3D data, the modeled object is placed on the modeling table to stabilize the meniscus in the ejection means. Apart from that, a technique for performing empty discharge is known.

For example, in Patent Document 1, ink is ejected to form a layer for forming a three-dimensional structure for the purpose of providing a forming apparatus and a forming method capable of forming a three-dimensional structure with high accuracy. A recording unit, a maintenance unit for maintaining the recording unit, and a control unit for controlling the recording unit are provided, and the control unit is located between a position where the recording unit is maintained by the maintenance unit and a position where layer formation is started. A configuration is disclosed in which the ink is controlled to be preliminarily ejected (empty ejection is performed).

However, in the prior art, it was not possible to stabilize the meniscus in the discharge means while maintaining the molding quality.

The present invention has been made in view of the above, and an object of the present invention is to provide a modeling method, a modeling device, and a modeling program capable of maintaining the modeling quality while stabilizing the meniscus in the discharging means. To do.

In order to solve the above-mentioned problems and achieve the object, the present invention is a modeling method in which a discharge means for discharging a modeling material and a modeling table scan relatively reciprocally to form a modeling layer. The waste modeling layer is formed before and after the layer is formed, and the waste modeling layer before forming the outbound modeling layer and the waste modeling layer before forming the inbound modeling layer are the modeling materials with the first pulse. The waste modeling layer after modeling the outbound modeling layer and the waste modeling layer after modeling the inbound modeling layer are modeled by discharging the modeling material with the second pulse.

According to the present invention, it is possible to provide a modeling method, a modeling device, and a modeling program capable of maintaining the modeling quality while stabilizing the meniscus in the discharging means.

FIG. 1 is a diagram showing an example of the configuration of the modeling system of the embodiment. FIG. 2 is a diagram showing an example of the hardware configuration of the control device of the embodiment. FIG. 3 is a diagram showing an example of the function of the control device of the embodiment. FIG. 4 is a diagram for explaining the empty discharge method of the embodiment. FIG. 5 is a diagram for explaining an empty discharge method of the embodiment. FIG. 6 is a diagram for explaining the empty discharge method of the embodiment. FIG. 7 is a diagram for explaining the empty discharge method of the embodiment. FIG. 8 is a diagram showing an example of a drive waveform when one droplet is ejected with a single pulse. FIG. 9 is a diagram showing an example of a drive waveform when one droplet is ejected with multiple pulses. FIG. 10 is a flowchart showing an operation example of the control unit of the embodiment. FIG. 11 is a diagram for explaining a discharge method of a modified example. FIG. 12 is a diagram for explaining a discharge method of a modified example.

Hereinafter, embodiments of a modeling method, a modeling device, and a modeling program according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing an example of the configuration of the modeling system of the present embodiment. As shown in FIG. 1, the modeling system includes a modeling table 1, a head module 2, and a control device 100. The modeling table 1 is a table in which the modeling layer 11 and the waste modeling layers 12a and 12b are held. The control device 100 controls the operation of the head module 2. In this modeling system, under the control of the control device 100, the modeling table 1 and the head module 2 are in the X direction (main scanning direction) corresponding to the left-right direction of FIG. 1 and the Y direction corresponding to the depth direction of FIG. Droplets (modeling materials) are repeatedly ejected and cured from the head module 2 onto the modeling table 1 while moving relative to the Z direction (stacking direction) corresponding to the vertical direction in FIG. 1 (secondary scanning direction). , The modeling layer 11 is formed on the modeling table 1. Further, waste modeling layers 12a and 12b are formed on both ends of the modeling table 1 in the main scanning direction by empty discharge. In the following description, when the waste modeling layers 12a and 12b are not distinguished, they are simply referred to as "disposal modeling layer 12".

The empty discharge (preliminary discharge) means that the droplets (modeling material) are discharged to a region other than the modeling region where the modeling layer 11 is formed in the region on the modeling table 1. In FIG. 1, the regions at both ends outside the modeling region of the modeling table 1 are regions where the waste modeling layer 12 is formed. In the present specification, the modeling layer formed by this empty discharge is referred to as a "disposal modeling layer". By forming the waste modeling layer 12 separately from the modeling layer 11 based on the modeling data, the ejection accuracy of the head module 2 can be improved.

The head module 2 is an example of a ejection means for ejecting a molding material, and includes a print head for ejecting droplets, a liquid drop curing means for curing the droplets (for example, a UV light source), and uncured droplets. It is equipped with a roller for smoothing. For example, it may be considered that the print head mounted on the head module 2 corresponds to the "discharging means for ejecting the modeling material". The print head, the liquid drop curing means, and the rollers may be integrated or separate. The modeling layer 11 and the waste modeling layers 12a and 12b can be formed by scanning the head module back and forth in the main scanning direction. Further, for example, by using a long head module 2 in the Y direction (secondary scanning direction), the relative movement with the modeling table 1 may be limited to the X direction (main scanning direction) and the Z direction (stacking direction). it can. The head module 2 may remain fixed and the modeling table 1 may move, or the modeling table 1 may remain fixed and the head module 2 may move. This allows the print head to eject the liquid drops on the outward and return paths. At the time of modeling, droplets may be ejected on the outward path and the return path in all the modeling layers 11, or may be changed for each modeling layer 11. The droplet curing means and rollers may be driven in all the modeling layers 11 on the outward path and the returning path, or may be changed for each modeling layer 11.

Next, the hardware configuration of the control device 100 will be described with reference to FIG. FIG. 2 is a diagram showing an example of the hardware configuration of the control device 100.

The control device 100 includes a main control device 100A including a CPU (Central Processing Unit) 101, a ROM (Reed Only Memory) 102, and a RAM (Random Access Memory) 103.

The CPU 101 controls the entire modeling system. The ROM 102 stores a modeling program including a program for causing the CPU 101 to control the modeling operation including the control according to the present invention, and other fixed data. The RAM 103 temporarily stores modeling data and the like.

The control device 100 includes a non-volatile memory (NVRAM; Non-Volatile RAM) 104 for holding data even while the power of the device is cut off. Further, the control device 100 includes an ASIC (Application Specific Integrated Circuit) 105 that processes image processing that performs various signal processing on image data and other input / output signals for controlling the entire device.

The modeling data creation device 200 is an device that creates two-dimensional data (modeling data) indicating a cut surface obtained by slicing a modeled object (three-dimensional modeled object) in the final form for each modeling layer, and is an information processing device such as a personal computer. It is built with.

The control device 100 includes an I / O (Input / Output) 107 for capturing detection signals of various sensors.

The control device 100 includes a head drive control unit 108 that drives and controls the print head mounted on the head module 2.

The control device 100 includes a motor drive unit 110 that drives a motor that constitutes an X-direction scanning mechanism 130 that moves the head module 2 in the X direction, and a motor that constitutes a Y-direction scanning mechanism 140 that moves the head module 2 in the Y direction. The motor drive unit 111 for driving the motor drive unit 111 is provided.

The control device 100 includes a motor drive unit 112 that drives the motor of the Z-direction elevating means 150 that elevates and lowers the modeling table 1 in the Z direction. The head module 2 may be moved up and down in the Z direction.

The control device 100 includes a motor drive unit 113 that drives a motor 160 that rotationally drives a flattening roller mounted on the head module 2, and a maintenance drive unit 114 that drives a maintenance mechanism 170 of a print head mounted on the head module. ing.

The control device 100 includes a curing control unit 115 that controls ultraviolet irradiation by the UV irradiation unit 180 mounted on the head module.

A detection signal such as a temperature / humidity sensor 190 that detects temperature and humidity as an environmental condition of the device and a detection signal of other sensors are input to the I / O 107 of the control device 100.

An operation panel 122 for inputting and displaying information necessary for this device is connected to the control device 100.

The control device 100 receives the modeling data from the modeling data creating device 200. The control device 100 is driven to form a modeled object (three-dimensional modeled object) according to the input modeling data. As a result, the desired modeled object is modeled in the modeling system.

FIG. 3 is a diagram showing an example of the function of the control device 100. As shown in FIG. 3, the control device 100 has a control unit 300. The control unit 300 is an example of a "control unit", and controls the modeling of the waste modeling layer 12 before and after modeling the modeling layer 11, and is combined with the waste modeling layer 12 before modeling the outward modeling layer 11. The waste modeling layer 12 before modeling the return modeling layer is formed by discharging the modeling material with the first pulse, and the waste modeling layer 12 after modeling the outward modeling layer 11 and the returning modeling layer. The waste modeling layer 12 after modeling 11 controls the modeling by discharging the modeling material with the second pulse. The first pulse and the second pulse are different, and in this embodiment, the first pulse is a single pulse and the second pulse is a multi-pulse. More specific contents will be described later.

As shown in FIG. 3, the control unit 300 includes a discharge control unit 301, an irradiation control unit 302, and a movement control unit 303. The discharge control unit 301 controls the discharge of droplets from the head module 2. Specifically, the discharge control unit 301 controls the operation of the head drive control unit 108 and the like. The irradiation control unit 302 controls ultraviolet irradiation that cures the droplets ejected on the modeling table 1. Specifically, the irradiation control unit 302 controls the operation of the curing control unit 115 and the like. The movement control unit 303 controls the relative movement of the modeling table 1 and the head module 2. Specifically, the movement control unit 303 controls the operation of the motor drive units 110, 111, 112 and the like. The function of the control unit 300 described above is realized by a combination of the functions of the discharge control unit 301, the irradiation control unit 302, and the movement control unit 303, but is not limited thereto. Various functions possessed by the control unit 300 are realized by the CPU 101 executing a program stored in the ROM 102 or the like, but the present invention is not limited to this, and for example, some or all of the various functions possessed by the control unit 300. However, it may be realized by a dedicated hardware circuit (for example, a semiconductor integrated circuit or the like).

Hereinafter, the empty discharge method of the present embodiment will be described. As shown in FIG. 4, the modeling layer 11 and the waste modeling layers 12a and 12b are formed by bidirectional printing. Bidirectional printing means that the head module 2 is ejected on the outward path and the return path by the relative movement of the modeling table 1 and the head module 2. In the example of FIG. 4, the droplet size of the droplet 22a (modeling material) discharged on the outward path of the waste modeling layer 12a is equal to the droplet size of the droplet 32b ejected on the return path of the waste modeling layer 12b, and the waste modeling is performed. Since the droplet size of the droplet 22b ejected on the outward path of the layer 12b is equal to the droplet size of the droplet 32a ejected on the return path of the layer 12a and the main scanning resolutions of the outward path and the return path are the same, the waste modeling In the layers 12a and 12b, two layers having different thicknesses are laminated by bidirectional printing, and the laminated thicknesses of the two layers are the same.

That is, in the present embodiment, each of the waste modeling layer 12a before modeling the outward modeling layer 11 and the waste modeling layer 12b before modeling the return modeling layer 11 is discharged from the head module 2. The size of the droplets (modeling material) to be formed is substantially the same, and each of the waste modeling layer 12b after modeling the outward modeling layer 11 and the waste modeling layer 12a after modeling the return modeling layer 11 is modeled. The size of the droplets ejected from the head module 2 is substantially the same, and the layer thickness of the waste modeling layer 12 after the reciprocating scanning is substantially the same as the layer thickness of the modeling layer 11. With such a configuration, the droplet sizes of the droplets 22a and 32b at the time of scanning in the main scanning direction and at the time of empty ejection performed before laminating the modeling layer 11 are adjusted for stabilizing the pressure in the head liquid chamber. Since the droplet sizes of the droplets 22b and 32a at the time of empty ejection performed after laminating the modeling layer 11 can be adjusted so as to form the same height as the modeling layer 11, they are formed by reciprocating printing in the main scanning direction. It is possible to make the laminated thickness of the waste modeling layers 12a and 12b the same as the laminated thickness of the modeling layer 11.

Further, the droplet size of the droplet 21 ejected in the outward path in the main scanning direction of the modeling layer 11 and the droplet size of the droplet 31 ejected in the return path may be the same, and the droplet size may be increased only in the return path. The droplet 31> the droplet 21 may be set, or the droplet size may be set to the droplet 21> the droplet 31 by reducing the discharge amount only on the return path. Regarding the control of the droplet size, a method of controlling by the weight of the ejected droplet, a method of controlling the droplet landing on the media by the diameter measured on the XY plane, and a method of using the height of the droplet landing on the media in the Z direction. It can be carried out by using any one of these or a plurality of these.

FIG. 5 is a diagram showing the results of measuring the diameters of the liquid drops 22a and the liquid drops 32a landing on the modeling table 1 on the XY plane. D2a shown in FIG. 5 indicates the diameter of the liquid drops 22a, and D3a. Indicates the diameter of the liquid drop 32a.

FIG. 6 is a diagram showing the results of measuring the heights of the liquid drops 22a and the liquid drops 32a landing on the modeling table 1 in the Z direction, and H2a shown in FIG. 6 indicates the height of the liquid drops 22a. H3a indicates the diameter of the liquid drop 32a.

Here, the droplets that land on the modeling table 1 are referred to as "dots". In the present embodiment, droplets discharged from the head module when modeling each of the waste modeling layer 12a before modeling the outward modeling layer 11 and the waste modeling layer 12b before modeling the return modeling layer 11. The diameters of the dots formed by (22a, 32b) are substantially the same, and the waste modeling layer 12b after modeling the outward modeling layer 11 and the waste modeling layer 12a after modeling the return modeling layer 11 The diameters of the dots formed by the droplets (22b, 32a) ejected from the head module when each is modeled are substantially the same. The layer thickness of the waste modeling layer 12 after the reciprocating scanning is substantially the same as the layer thickness of the modeling layer 11.

Further, droplets (22a) discharged from the head module 2 when modeling each of the waste modeling layer 12a before modeling the outward modeling layer 11 and the waste modeling layer 12b before modeling the return modeling layer 11 , 32b), the heights of the dots are substantially the same, and the waste modeling layer 12b after modeling the outward modeling layer 11 and the waste modeling layer a after modeling the return modeling layer 11 respectively. The heights of the dots formed by the droplets (22b, 32a) ejected from the head module 2 at the time of modeling are substantially the same. The layer thickness of the waste modeling layer 12 after the reciprocating scanning is substantially the same as the layer thickness of the modeling layer 11.

Further, in the present embodiment, the control unit 300 ejects droplets from the head module 2 when modeling the waste modeling layer 12a before modeling the modeling layer 11, and the head when modeling the modeling layer 11. Control is performed so that the drive has a lower frequency than the ejection of droplets from the module 2. More specifically, as shown in FIG. 7, the control unit 300 uses a single pulse and a low frequency (2 kHz or less) as the first pulse for the droplets 22a and 32b at the time of empty ejection before modeling the modeling layer 11. The droplets 21 and 31 when the modeling layer 11 is formed are ejected by the head drive of the above, and then the droplets 22b at the time of empty ejection after the modeling layer 11 is formed after being ejected by the head drive of a high frequency (14 kHz or the like). Control is performed to discharge 32a as a second pulse by driving a multi-pulse head.

With such a configuration, single pulse and low frequency empty discharge is always performed before laminating the modeling layer 11 during reciprocating printing, so that the modeling layer 11 is in a state where the pressure inside the ejection means is stabilized. By printing, it is possible to prevent deterioration of the quality of the modeled object and realize high productivity. Further, the droplets 22b and 32a at the time of empty ejection after the modeling layer 11 is formed are ejected with multiple pulses to increase the droplet size, so that the droplets 22a and 32b ejected with a single pulse have a thin laminated thickness. It is possible to make the laminated thickness of the waste modeling layers 12a and 12b after the reciprocating scanning the same as that of the modeling layer 11.

FIG. 8 is a diagram showing an example of a drive waveform (waveform of the voltage for driving the print head mounted on the head module 2) when one droplet is ejected in a single pulse, and FIG. 9 is a diagram showing one liquid. It is a figure which shows an example of the drive waveform at the time of ejecting a drop with a multi-pulse.

FIG. 10 is a flowchart showing an operation example of the control unit 300 when modeling the modeling layer 11, the waste modeling layers 12a, and 12b by bidirectional printing. The specific contents of each step are as described above. As shown in FIG. 10, first, the control unit 300 controls to model the waste modeling layer 12a before modeling the modeling layer 11 on the outward route (step S1). Here, as the first pulse, it is discharged by a single pulse head drive. Next, the control unit 300 controls to model the outbound modeling layer 11 (step S2). Next, the control unit 300 controls to form the waste modeling layer 12b after modeling the outbound modeling layer 11 (step S3). Here, as the second pulse, it is ejected by a multi-pulse head drive.

Next, the control unit 300 controls to model the waste modeling layer 12b before modeling the modeling layer 11 on the return path (step S4). Here, as the first pulse, a single pulse is ejected by a low frequency (2 kHz or less) head drive. Next, the control unit 300 controls to model the modeling layer 11 on the return path (step S5). Next, the control unit 300 controls to model the waste modeling layer 12a after modeling the modeling layer 11 on the return path (step S6). Here, as the second pulse, it is ejected by a multi-pulse head drive.

As described above, in the present embodiment, the waste modeling layer 12 is modeled before and after the modeling layer 11 is modeled, and the waste modeling layer 12 before modeling the outward modeling layer 11 and the returning modeling layer 12 are formed. The waste modeling layer 12 before modeling is formed by ejecting the modeling material with the first pulse, and after modeling the outbound modeling layer 11 and the waste modeling layer 12 and the return modeling layer 11. The waste modeling layer 12 of the above is modeled by discharging the modeling material with the second pulse. As described above, the first pulse and the second pulse are different, the first pulse is a single pulse and the second pulse is multiple pulses. As a result, a single pulse of air is discharged before laminating the modeling layer 11 during reciprocating printing, so that the modeling layer 11 can be modeled while the pressure inside the ejection means is stabilized. It is possible to prevent deterioration of quality and realize high productivity. Further, after the modeling layer 11 is formed, a multi-pulse empty ejection is performed to increase the droplet size, so that it is possible to compensate for the thin stacking thickness of the droplets ejected by a single pulse. Further, since the laminated thicknesses of the waste modeling layers 12a and 12b after the reciprocating scanning can be made the same, the gap between the waste modeling object 12 and the nozzle surface during the modeling operation can be kept constant. That is, according to the present embodiment, the gap between the waste modeled object and the nozzle surface during the modeling operation can be kept constant while stabilizing the meniscus in the discharging means.

Although the embodiment according to the present invention has been described above, the present invention is not limited to the above-described embodiment as it is, and at the implementation stage, the components can be modified and embodied without departing from the gist thereof. In addition, various inventions can be formed by an appropriate combination of the plurality of components disclosed in the above-described embodiment. For example, some components may be removed from all the components shown in the embodiments.

A modified example will be described below. The following modified examples can be combined with the above-described embodiment, or the modified examples can be arbitrarily combined.

(1) Modification 1
For example, the control unit 300 controls to accelerate the scanning speed after starting the modeling of the waste modeling layer 12 before modeling the modeling layer 11 and before starting the modeling of the modeling layer 11. May be good. For example, as shown in FIG. 11, the droplets 22a and 32b at the time of empty ejection before modeling the modeling layer 11 are started to be ejected by a single pulse, low frequency (for example, 2 kHz or less) head drive, and modeling in the main scanning direction. An acceleration region is provided up to the modeling start position of the layer 11, and the droplets 21 and 31 at the time of modeling the modeling layer 11 are discharged by a high frequency (for example, 14 kHz or the like) head drive. The acceleration region may overlap with the latter half of the droplets 22a and 32b at the time of empty ejection before forming the modeled object layer, and at the time of ejecting the droplets 22b and 32a at the time of empty ejection after the modeling layer 11 is formed. It is configured to provide a deceleration area. With the above configuration, it is possible to prevent deterioration of the quality of the modeled object, realize high productivity, and reduce the size of the device in the main scanning direction.

(2) Modification example 2
For example, the control unit 300 may be in a form of controlling so that the waste modeling layer is not formed on the same straight line in the direction intersecting the scanning direction. For example, as shown in FIG. 12, the waste modeling layers 12a and 12b may not be formed on the same straight line in the Y direction (direction intersecting the scanning direction), but the thin plate shapes may be arranged in a zigzag manner. it can. With such a configuration, the waste modeling layers 12a and 12b can have strength in the X direction even when the stacking height is increased, so that the waste modeling layer 12 can be formed with a small amount of droplets. This makes it possible to achieve a reduction in the amount of waste ink.

(3) Modification 3
The modeling material for modeling the modeled object may be a model material or a support material. The model material is not particularly limited as long as it is a liquid that cures by applying energy such as light or heat, and can be appropriately selected according to the purpose. The model material preferably contains a polymerizable monomer such as a monofunctional monomer or a polyfunctional monomer, an oligomer, and a photopolymerization initiator, and further contains other components as necessary. The model material preferably has liquid physical properties such as viscosity and surface tension that can be discharged by the discharging means.

The support material (shape-supporting liquid) contains a monomer (A) having a hydrogen bonding ability, a solvent (B) having a hydrogen bonding ability, and a polymerization initiator (C), and is a solvent having a hydrogen bonding ability (a solvent (C). B) is at least one selected from diols having 3 or more carbon atoms and 6 or less carbon atoms, carboxylic acid compounds, amine compounds, ester compounds, ketone compounds, and urea compounds, and further contains other components as necessary. When the solubility of the support material is increased, the support material becomes easy to remove, but the support performance is insufficient, and when the modeling device is enlarged to increase the modeling volume, the shape supporting capacity is insufficient. is there. The support material preferably has water disintegration property. The water disintegration property means that when immersed in water, the cured product is decomposed into small pieces, and the shape and properties originally possessed cannot be maintained.

(program)
The program executed by the above-mentioned control device 100 is a file in an installable format or an executable format, and is a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versaille Disk), or a USB (Universal Serial Bus). ) Or the like, which may be recorded on a computer-readable recording medium and provided, or may be provided or distributed via a network such as the Internet. In addition, various programs may be configured to be provided by incorporating them into a ROM or the like in advance.

1 Modeling table 2 Head module 11 Modeling layer 12 Waste modeling layer 100 Control device 300 Control unit 301 Discharge control unit 302 Irradiation control unit 303 Movement control unit

JP-A-2016-016568

Claims (12)

It is a modeling method in which the discharging means for discharging the modeling material and the modeling table scan relatively back and forth to form the modeling layer.
Before and after modeling the modeling layer, the waste modeling layer is modeled,
The waste modeling layer before modeling the outward modeling layer and the waste modeling layer before modeling the inbound modeling layer are modeled by discharging the modeling material with the first pulse.
The waste modeling layer after modeling the outward modeling layer and the waste modeling layer after modeling the inbound modeling layer are modeled by ejecting the modeling material with the second pulse.
Modeling method. The first pulse and the second pulse are different,
The modeling method according to claim 1. The first pulse is a single pulse and
The second pulse is a multi-pulse,
The modeling method according to claim 2. The size of the modeling material discharged from the discharging means is substantially the same when modeling each of the waste modeling layer before modeling the outward modeling layer and the waste modeling layer before modeling the return modeling layer.
The size of the modeling material discharged from the discharge means when modeling each of the waste modeling layer after modeling the outward modeling layer and the waste modeling layer after modeling the return modeling layer is substantially the same.
The layer thickness of the waste modeling layer after reciprocating scanning is substantially the same as the layer thickness of the modeling layer.
The modeling method according to any one of claims 1 to 3. The diameter of the dots formed by the modeling material discharged from the discharge means when modeling each of the waste modeling layer before modeling the outward modeling layer and the waste modeling layer before modeling the return modeling layer is Almost the same,
The diameter of the dots formed by the modeling material discharged from the discharge means when modeling each of the waste modeling layer after modeling the outward modeling layer and the waste modeling layer after modeling the return modeling layer is Almost the same,
The layer thickness of the waste modeling layer after reciprocating scanning is substantially the same as the layer thickness of the modeling layer.
The modeling method according to any one of claims 1 to 3. Height of dots formed by the modeling material discharged from the discharge means when modeling each of the waste modeling layer before modeling the outward modeling layer and the waste modeling layer before modeling the return modeling layer. Are almost the same,
Height of dots formed by the modeling material discharged from the ejection means when modeling each of the waste modeling layer after modeling the outward modeling layer and the waste modeling layer after modeling the return modeling layer. Are almost the same,
The layer thickness of the waste modeling layer after reciprocating scanning is substantially the same as the layer thickness of the modeling layer.
The modeling method according to any one of claims 1 to 3. Disposal before modeling the modeling layer The ejection of the modeling material from the discharging means when modeling the modeling layer is driven by a lower frequency than the ejection of the modeling material from the discharging means when modeling the modeling layer. Do, do
The modeling method according to any one of claims 1 to 6. After starting the modeling of the waste modeling layer before modeling the modeling layer, the scanning speed is accelerated before the modeling of the modeling layer is started.
The modeling method according to any one of claims 1 to 7. The waste modeling layer is not formed on the same straight line in the direction intersecting the scanning direction.
The modeling method according to any one of claims 1 to 8. The modeling material is a model material or a support material,
The modeling method according to any one of claims 1 to 9. It is a modeling device in which the discharging means for discharging the modeling material and the modeling table scan relatively back and forth to form the modeling layer.
Control to form the waste modeling layer before and after modeling the modeling layer,
The waste modeling layer before modeling the outward modeling layer and the waste modeling layer before modeling the inbound modeling layer are modeled by discharging the modeling material with the first pulse.
The waste modeling layer after modeling the modeling layer on the outward route and the waste modeling layer after modeling the modeling layer on the return route include a control unit that controls the modeling by discharging the modeling material with the second pulse.
Modeling equipment. For a modeling device that forms a modeling layer by scanning the discharge means that discharges the modeling material and the modeling table relatively reciprocatingly.
Control to form the waste modeling layer before and after modeling the modeling layer,
The waste modeling layer before modeling the outbound modeling layer and the waste modeling layer before modeling the inbound modeling layer are modeled by ejecting the modeling material with the first pulse.
The waste modeling layer after modeling the outbound modeling layer and the waste modeling layer after modeling the inbound modeling layer are used to execute the step of controlling the modeling by discharging the modeling material with the second pulse. Modeling program.

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