JP3422039B2 - Optical shaping method and optical shaping apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical molding method and an optical molding apparatus for molding a desired resin model by scanning and irradiating a light curable resin such as an ultraviolet curable resin with a light beam. In particular, the present invention relates to an optical modeling method and an optical modeling apparatus capable of preventing deformation of a resin model and shortening modeling time.

[0002]

2. Description of the Related Art For example, a surface of a tank containing an ultraviolet curable resin liquid is scanned while an ultraviolet laser is turned on and off, and a scanning curable layer cured by this is sequentially stacked to obtain a desired resin model. It has been attempted to model. Since such a resin model is used as, for example, a master model of a product, it is necessary to improve molding accuracy, interlayer adhesiveness, molding efficiency, and the like when molding.

In the conventional optical modeling method, ultraviolet rays are generated from an ultraviolet laser, and an ultraviolet laser is turned on / off by an optical system having a galvanometer mirror and a shutter.
Irradiation is performed on the surface of the tank containing the ultraviolet curable resin liquid while controlling the scanning directions of F and light rays. An elevator capable of blocking the ultraviolet laser and moving up and down is installed in the tank, and the resin liquid interposed between the resin liquid surface and the elevator is cured by the ultraviolet laser.

Then, in the first stage of the molding process, the elevator is raised and the resin liquid interposed between the resin liquid surface and the elevator is cured by an ultraviolet laser to form the first scan-cured layer. After that, the elevator is lowered by one layer, and the second scan-cured layer is formed on the first scan-cured layer in the same procedure as that of the first layer. In the same manner, scan-cured layers are sequentially laminated (hereinafter also referred to as “deposition”), and when the formation of the final scan-cured layer is completed, the elevator is raised and the model is taken out from the resin liquid, and then the final In order to perform proper curing, the entire model is irradiated with ultraviolet rays for a long time using an ultraviolet lamp or the like.

Hereinafter, in the present specification, a plane in the same movement pitch of the above-mentioned elevator will be referred to as a "contour section".
However, in this one contour section, there are a region where the resin liquid is hardened and a region where the resin liquid is not hardened, depending on the three-dimensional shape of the target model.

Then, the ultraviolet beam generated from the ultraviolet laser oscillator is scanned by the optical system along the scanning direction. At this time, the ultraviolet laser is turned on (actually, the shutter AOM is opened) in the area where the resin liquid is cured. The ultraviolet laser is turned off (actually, the shutter AOM is closed) in a region where the resin liquid is not cured. When the scanning of one scanning line is completed, the optical system is controlled to phase the scanning line by the scanning pitch, and the same scanning is performed again in the scanning direction.

When an ultraviolet beam is applied to the inside of the resin liquid, the resin liquid gradually reduces the light energy. Therefore, microscopically, the irradiation area with a sharp tip (that is,
A scan hardening layer) will be formed.

In this manner, the scan-cured layer having a uniform cross-section is formed. When the scan-cured layers are sequentially laminated, the lower layer is also irradiated with the ultraviolet beam when the scan-cured layer as the upper layer is formed. Such a light intensity, that is, the curing depth in the contour cross section is controlled to be larger than the laminated thickness to enhance the adhesion between the layers.

[0009]

By the way, when the shape of the scanning hardening layer in one contour section is a closed region surrounded by contour lines, in the conventional modeling method, the contour lines are first recognized and then the contour lines are recognized. , An area that performs vector scanning along the contour line in the inner area surrounded by the contour line, and an area that is inside the area and that performs mutually orthogonal raster scanning (main scanning and sub-scanning) And separate on the data,
In performing the raster scan, the optical system was controlled so that the main scan and the sub scan had the same scanning speed and the same curing depth.

However, in such a scanning method, since the scanning speed is set to a relatively low speed in order to secure the modeling accuracy of raster scanning, the time required for modeling becomes long, which is an improvement in terms of production efficiency. There was room.

Further, in terms of modeling accuracy, when one scan is performed at a low speed, the volume of resin that is cured at one time is large, so that the amount of deformation at the time of curing is large, and further, such curing of the resin takes a long time. Then, there is a problem that the deformation is further promoted. In particular, when the resin model to be molded is large, such a problem becomes remarkable.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to perform molding in a short time while preventing deformation of a closed region surrounded by a contour line. .

[0013]

In order to achieve the above-mentioned object, the optical modeling method of the present invention comprises irradiating a photocurable resin liquid with a light beam having a strength for curing the photocurable resin liquid. In the optical molding method of sequentially forming the three-dimensional resin molding to form a three-dimensional resin molding,
And a second contour line that defines a second region along the inside by approximately the dimension of the cured portion of the photocurable resin liquid caused by the irradiation of the light rays with respect to the first contour line, defining a third region prior to the photocurable resin liquid in the region of the third
A third scanning speed in scanning the light beam and
A third contour line along the inner side of the second contour line is determined at intervals according to strength, and the photocurable resin liquid in the third region within the third contour line is determined. in, until the lower layer of the photocured layer is scanning the light beam in the non cured third scanning rate, in the photocurable resin liquid in said second region in said second contour, the second Cured to reach the lower photo-cured layer in the entire area,
And scanning the light beam at a second scanning speed smaller than the third scanning speed, and in the photocurable resin liquid in the first region between the second contour line and the first contour line, The light beam is scanned along the first contour line at a first scanning speed that reaches the lower photocurable layer.

The light in the second and third regions
The curable resin liquid is raster-scanned with the light beam.

In the second and third regions,
The light rays are substantially orthogonal to each other in the photocurable resin liquid.
Raster scanning in the direction is preferable.

Further, in order to achieve the above object, in the optical modeling method of the present invention, the photocurable resin liquid is irradiated with a light beam having a strength for curing the photocurable resin liquid to sequentially form photocurable layers. In the optical molding method for forming a three-dimensional resin molded article, the outermost first contour line of the photocurable layer to be formed, and the photocurability by irradiating the first contour line with the light beam. Along the inner side of the resin resin hardened portion approximately the second dimension
A second contour line defining the regions, the light beam to the photocurable resin liquid in the region of the third defining a third region
Depending on the third scanning speed when scanning and the intensity of the light beam,
A third contour line along the inner side with respect to the second contour line is determined at equal intervals, and the second contour line and the first contour line are determined.
The photocurable resin liquid in the first region between the contour lines of the first scanning line with the first scanning line at a first scanning speed to reach the lower photocurable layer, said photocurable resin liquid in said third region within 3 outline, to the lower layer of the photocured layer is scanning the light beam in the non cured third scanning rate, in the second contour The photocurable resin liquid in the second region is cured so as to reach the lower photocurable layer in the entire second region, and at a second scanning speed lower than the third scanning speed. Scan the light beam.

The light in the second and third regions
The curable resin liquid is raster-scanned with the light beam.

In the second and third regions,
The light rays are substantially orthogonal to each other in the photocurable resin liquid.
Raster scanning in the direction is preferable.

Further, in order to achieve the above-mentioned object, the optical modeling apparatus of the present invention is suitable for curing a photocurable resin liquid tank containing a photocurable resin liquid and the photocurable resin liquid. Optical scanning means for generating a light beam having a different wavelength and scanning the light beam, an elevating means for elevating and lowering a cured resin generated by irradiating the surface of the photocurable resin liquid with the light beam, and the optical scanning means. And a control means for controlling the elevating means, wherein the control means comprises a three-dimensional modeling information storage section for storing at least a part of three-dimensional modeling information for three-dimensional modeling, and the elevating means. A scan hardening layer information extraction unit that extracts information about a scan hardening layer formed by scanning and irradiating the light beam in a non-operating state from the stereoscopic information stored in the stereoscopic modeling information storage unit; Love A contour line detection unit that detects the outermost first contour line of the photo-cured layer to be formed based on the scanning hardened layer information obtained from the extraction unit, and the first contour line detection unit that obtains the contour line detection unit. A second contour line that defines a second region along the inner side of the contour line by approximately the dimension of the cured portion of the photocurable resin liquid by irradiation of the light beam, and a third region that defines the third region. Photocurable resin liquid in the region of
And a third scanning speed when scanning the light beam to the
Means for determining a third contour line along the inner side of the second contour line at intervals according to the strength of the line, and the second contour line and the first contour line. The photocurable resin liquid in the first region between the lines is scanned with the light beam along the first contour line at a first scanning speed that allows the photocurable resin liquid to reach the lower photocurable layer, said photocurable resin liquid in said third region within the contour, to the lower layer of the photocured layer is scanning the light beam in the non cured third scanning rate, the first in the second contour The photocurable resin liquid in the second region is cured so as to reach the lower photocurable layer in the entire second region, and the third region
The light scanning means is controlled to scan the light beam at a second scanning speed smaller than the scanning speed of.

[0020]

[0021]

[0022]

[0023]

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, the configuration of an optical modeling apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the basic configuration of the optical modeling apparatus of the present invention.

The optical modeling apparatus of this embodiment has a photo-curable resin liquid tank 2, and the photo-curable resin liquid 1 contained in this tank causes addition polymerization by irradiation with light. A material that cures and cures. For example, vinyl monomers such as styrene, methyl methacrylate, and vinyl acetate can be polymerized by irradiation with light in the absence of a photopolymerization initiator or in the presence of a sensitizer or dye that absorbs ultraviolet light. cause.

However, the type of the photocurable resin liquid 1 used in the present invention is not particularly limited, and may be a resin that is liquid when it is uncured and solidifies by curing. Further, the light LB to be irradiated is not particularly limited, and light other than ultraviolet light may be selected according to the photocurable resin 1 used.

In the photocurable resin liquid tank 2, there is provided an elevator 4a having a pedestal for blocking a light beam and for mounting a cured resin thereon.
The elevator 4b can move up and down inside the photocurable resin liquid tank 2. The lift 4b has a function of mechanically moving the elevator 4a up and down, and a control function of controlling the lifting operation. The command signal to the elevator 4b is given from the general control section 5a of the control means 5, but the optical scanning means 3
The general control section 5a outputs a command signal to the elevator 4b on the basis of information from the optical scanning means 3 or the optical scanning means 3.

For example, when the optical scanning means 3 detects that the scanning of one contour section has been completed, the general control section 5a issues a command to the elevator 4b in order to shift to the scanning of the next contour section. It outputs a signal, which allows the elevator 4b
Lowers the elevator 4a by a predetermined pitch (that is, the pitch becomes the laminated thickness T in the contour section).

On the other hand, the optical scanning means 3 according to this embodiment is a laser oscillator 3a for generating a light beam such as an ultraviolet laser.
And an optical system 3b for scanning the surface of the photocurable resin liquid with a light beam generated by the laser oscillator 3a according to a predetermined locus, and an optical system controller 3c for controlling the optical system 3b. ing. Optical system 3b
For example, a shutter device (AOM) for passing / blocking a light beam, a voltage application device for changing the direction of the light beam, a galvanometer mirror, and the like are provided in the O.
It has the functions of N / OFF, change of light intensity, change of optical path, control of scanning speed of light, and the like. Then, to the optical system 3b, the optical system controller 3c outputs a command signal relating to an optical scanning condition according to a previously taught locus.

The operation of the optical scanning means 3 in the present invention is basically based on the basic locus data previously input to the general control section 5a, but the three-dimensional modeling information storage section 5 described later is used.
b, the scanning hardening layer information extraction unit 5c, the contour line detection unit 5d, the contour hardening information extraction unit 5e, the intermediate area information extraction unit 5f, and the internal area information extraction unit 5g, the optical system controller 3c.
A command signal is output to, and the detailed optical scanning conditions are changed.

The control means 5 according to this embodiment controls the elevating means 4 and the optical scanning means 3 while associating them with each other based on the data inputted in advance in accordance with the desired resin model. 5a. In addition to the general control unit 5a, the three-dimensional modeling information storage unit 5b, the scanning hardening layer information extracting unit 5c, the contour line detecting unit 5d, the contour hardening information extracting unit 5e, the intermediate region information extracting unit 5f, and the internal region information extracting unit. 5g is provided.

In the present embodiment, the information processing devices such as the elevator 4b, the optical system controller 3c, and the control means 5 are shown in FIG. 1 as a concrete example in which they are separately constructed. These are described for easy understanding of the respective functions, and as a matter of course, as long as the functions described above are provided, these may be combined in any combination to form an information processing apparatus.

Next, the three-dimensional modeling information storage unit 5 according to the present invention.
b, each processing procedure in the scanning hardening layer information extraction unit 5c, the contour detection unit 5d, the contour hardening information extraction unit 5e, the intermediate area information extraction unit 5f, and the internal area information extraction unit 5g will be described. In order to facilitate understanding of the general idea, as shown in FIG. 2, a specific example in which a modeling area surrounded by a contour line in one contour plane is molded will be described.

First, the three-dimensional modeling information storage unit 5b is a memory that stores information about the three-dimensional shape of the model to be modeled, and all the information about the three-dimensional shape of the model, or at least all of the modeling area surrounded by the contour line. Information about the three-dimensional shape of the contour cross section is stored.

The scanning hardening layer information extraction unit 5c extracts only the information concerning the scanning hardening layer, which is the modeling area in a certain contour section, from the three-dimensional information stored in the three-dimensional modeling information storage unit 5b. In other words, the general controller 5a discriminates between the hardened region and the non-hardened region in one contour section, and thereby turns on / off the light in the optical system.
The scanning hardened layer information extraction unit 5c selects and reads only the information related to the hardened area, and uses this as basic information for the following modeling method.

The contour line detecting section 5d reads the information of only the hardening region extracted by the scanning hardening layer information extracting section 5c,
Based on this information, the contour line OL of the hardening region in the same contour section is recognized.

The contour hardening information extraction unit 5e is a contour line detection unit.
In addition to the original contour line OL detected in 5d, shown in FIG.
In this way, the distance from the original contour line OL to the inside of the closed area is
Separation r ₀Another contour line OL separated by₀Is calculated to obtain.
This other contour line OL₀However, the
It will form the centerline of the torrel scan. Therefore, distance
Separation r₀Is the radius of the ultraviolet beam LB (strictly speaking, the ultraviolet beam
It is preferable to set the radius equal to
Yes.

Further, in the intermediate area information extraction unit 5f, in addition to the original contour line OL detected by the contour line detection unit 5d and another contour line OL ₀ obtained by the contour hardening information extraction unit 5e, FIG. As shown, yet another contour line OL _A separated from the original contour line OL by a distance r ₁ inside the closed region.
Is calculated to obtain. This further contour line OL _A constitutes the outer edge of the raster scan in the intermediate region R ₁ described later.

In the internal area information extraction unit 5g, the original outline OL detected by the outline detection unit 5d, another outline OL ₀ obtained by the outline hardening information extraction unit 5e, and the intermediate area information extraction unit 5f. Another contour line OL _{A found in}
In addition, as shown in FIG. 3, another contour line OL is separated from the original contour line OL by a distance r ₂ inside the closed region.
Calculate _B to obtain. This further contour line OL _B
This will form the outer edge of the raster scan in the inner region R ₂ described later. In this case, the relative size of the intermediate region R ₁ and the internal region R ₂ is set based on the scanning accuracy (scanning speed, ultraviolet laser intensity, etc.) that can be ensured when the internal region R ₂ is scanned at high speed. . For example, when the inner region R ₂ is scanned at the maximum speed, it is preferable to set the distance r ₂ large because the modeling accuracy of the scanned outer edge is not so expected.

The contour line information obtained by the contour hardening information extraction unit 5e is output to the optical system controller 3c, and the scanning of the light LB based on this information is performed on the contour line (actually OL ₀ ). Vector scan along the line. That is,
As shown in FIG. 6, the start point / end point position and the scanning direction are not particularly limited, but scanning is performed by tracing the contour line OL ₀ .

On the other hand, the information on the intermediate region R ₁ and the internal region R ₂ obtained by the intermediate region information extracting unit 5f and the internal region information extracting unit 5g is also output to the optical system controller 3c, and the light LB based on this information is output. The scanning is a so-called raster scanning, that is, scanning in the same direction along one scanning axis having scanning coordinates (which means both unidirectional scanning and reciprocal scanning).

Next, the operation will be described. 2 to 6 are plan views showing the modeling method according to the present embodiment, and FIG. 7 is a flowchart showing the processing procedure in the control means of the same embodiment. In the conventional optical modeling method, the entire closed region is raster-scanned at the same speed and the same depth, but in the present embodiment, the inner region R ₂ is fast and shallowly scanned, and then the intermediate region R ₁ is scanned. Slow and deep raster scanning. Particularly, in the embodiment shown in FIGS. 2 to 6, the intermediate region R ₁
And another contour line OL in which the inner region R ₂ is offset inward from the original contour line OL by distances r ₁ and r ₂ , respectively.
_A and OL _B.

First, the light scanning means 3a, 3b, 3c generate a light beam LB having a wavelength suitable for curing the photocurable resin liquid 1, and the photocurable resin liquid tank 2 stores the photocurable resin LB. The resin liquid 1 is scanned with the light beam LB. When the scanning of one contour section is completed, the cured resin 6 generated by the irradiation of the light beam LB is moved up and down by the moving means 4a and 4b.
The scanning hardened layer 6 is sequentially laminated by raising and lowering by and repeating such a procedure.

At this time, first, the light beam LB is formed by scanning and irradiating the light beam LB from the three-dimensional modeling information storage section 5b which stores at least a part of the three-dimensional modeling information to be three-dimensionally modeled, without operating the elevator 4a. The information about the scanning hardened layer 6 is extracted by the scanning hardened layer information extraction unit 5c. At the same time, the designated values of the scanning speed of each area and the intensity of the ultraviolet laser are read, and the offset amounts r ₀ , r ₁ and r ₂ are obtained based on these values (steps 1 and 2).

Then, based on the scanning hardening layer information obtained from the scanning hardening layer information extracting section 5c, the contour line detecting section 5
After detecting the contour line position OL of the scanning hardened layer 6 by d, the contour line position O obtained from the contour line detection unit 5d is detected.
A position O inside L by a predetermined distance r ₀
The contour hardening information extraction unit 5e calculates L ₀ as locus information (step 3, FIG. 3).

At the same time, in the intermediate area information extraction unit 5f, the original contour line OL detected by the contour line detection unit 5d and another contour line O obtained by the contour hardening information extraction unit 5e.
In addition to L ₀ , another contour line OL _A that is separated from the original contour line OL by a distance r ₁ inside the closed region is calculated and obtained. In the internal area information extraction unit 5g, the original outline OL detected by the outline detection unit 5d, another outline OL ₀ obtained by the outline hardening information extraction unit 5e, and the intermediate area information extraction unit 5f. Another contour line OL _{A found}
In addition, the distance r from the original contour line OL to the inside of the closed area
Another contour line OL _B separated by ₂ is calculated (step 3, FIG. 3).

Then, the intersection points at which the intermediate area information and the internal area information respectively obtained by the intermediate area information extracting section 5f and the internal area information extracting section 5g intersect the scanning lines are calculated, and written in the span data file (step 4, 5). Then, first, the span data regarding the internal region R ₂ is read, and this information is read by the optical system controller 3c.
(Step 6), and the inner region R ₂ is scanned at high speed and shallowly (step 7, FIG. 4). In this step, since the internal region R ₂ is scanned at a high speed and at a depth that does not reach the lower layer,
Most of the modeling area can be modeled in a short time, and the volume of resin that cures at one time is reduced by scanning at high speed. In addition to this, because the scanning does not reach the lower layer, deformation during curing Will be significantly suppressed.

After that, the span data concerning the intermediate region R ₁ is read, this information is output to the optical system controller 3c (step 8), and the intermediate region R ₁ is scanned at a low speed and deeply (step 9, FIG. 5). In this step, since the intermediate region R ₁ is scanned at a low speed and at a depth reaching the lower layer, the problems with respect to the adhesiveness with the lower layer and the modeling accuracy with respect to the internal region R ₂ modeled by the high speed and shallow scanning are solved. be able to. As a result, the overall molding time can be shortened while suppressing the deformation during curing.

Finally, the locus information obtained from the contour hardening information extraction unit 5e is output to the optical system controller 3c (step 10), and the vector scanning along the above-mentioned contour line OL ₀ is executed (step 11, FIG. 6). As a result, the modeling accuracy in the vicinity of the contour line is significantly improved without reducing the spot diameter of the light beam or the scanning pitch.

It should be noted that each of the embodiments described above is described for facilitating the understanding of the present invention, and not for limiting the invention. Therefore, each element disclosed in each of the above-described embodiments is intended to include all design changes and equivalents within the technical scope of the present invention. For example, for a photocurable resin liquid having a small volume contraction rate when cured by light irradiation, an offset r _{1 is applied} when raster-scanning the intermediate region in the inner region of the contour line.
Can be omitted. Further, the values of the offset amounts r ₀ , r ₁ , r ₂ from the contour line are not limited to those in the above-described embodiment, and the offset amount of the contour line to be offset may be changed depending on the part. It is possible. In addition, steps 10 and 1 of FIG.
The scanning of the contour area shown in 1 may be performed before the scanning of the internal area and the intermediate area.

[0051]

According to the present invention, before the photocurable resin liquid in the second region is scanned with the light beam at the second scanning speed,
The photocurable resin liquid in the third region within the contour line is scanned with light rays at a third scanning speed that does not cure the lower photocurable layer. The scanning of the light beam at the third scanning speed is
Since the scanning is performed at a speed higher than the second scanning speed, the volume of resin that is cured at one time becomes small, and since the scanning does not cure even the lower photocurable layer, deformation during curing is significantly suppressed. As described above, after molding most of the second region in a short time while suppressing the deformation during curing, the entire second region is irradiated, so that the resin of Since the amount of curing is reduced, deformation during curing is suppressed as a whole. Therefore, as compared with the conventional method in which the scanning of the second area is performed twice, the modeling time is shortened by the amount of scanning the light beam in the third area at the third scanning speed higher than the second scanning speed. be able to. As described above, according to the present invention, not only the molding time can be shortened but also the deformation of the model due to curing shrinkage can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of an optical modeling apparatus of the present invention.

FIG. 2 is a plan view showing a first step of the modeling method according to the embodiment of the present invention.

FIG. 3 is a plan view showing a second step similar to FIG.

FIG. 4 is a plan view and a cross-sectional view showing a third step similar to FIGS. 2 and 3.

FIG. 5 is a plan view and a cross-sectional view showing a fourth step similarly to FIGS.

FIG. 6 is a plan view and a cross-sectional view showing a fifth step similar to FIGS.

FIG. 7 is a flowchart showing a processing procedure in the control means of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Photocurable resin liquid 2 ... Photocurable resin liquid tank 3 ... Optical scanning means 3a ... Laser oscillator 3b ... Optical system 3c ... Optical system controller 4 ... Elevating means 4a ... Elevator 4b ... Elevator 5 ... Control means 5a ... General control section 5b ... 3D modeling information storage section 5c ... Scan hardening layer information extracting section 5d ... Contour line detecting section 5e ... Contour hardening information extracting section 5f ... Intermediate area information extracting section 5g ... Internal area information extracting section 6 ... Scan hardening layer LB ... light T ... laminate thickness R ₁ ... intermediate region R ₂ ... interior region OL ... shaped region of the contour line OL _a ... intermediate region of the contour line (boundary line) OL _B ... internal region of the contour line (boundary line)

Claims (7)

(57) [Claims] 1. An optical molding method for forming a three-dimensional resin molded article by irradiating a photocurable resin solution with a light beam having an intensity for curing the photocurable resin solution to sequentially form a photocurable layer. A first contour line which is the outermost portion of the photo-curable layer, and a second region along the inner side of the first contour line by approximately the dimension of the cured portion of the photo-curable resin liquid caused by irradiation of the light rays. Defining a second contour line and a third region defining the third region.
Scanning the light beam onto the photocurable resin liquid in the region of
And a third contour line extending inward with respect to the second contour line at a distance corresponding to the third scanning speed and the intensity of the light beam when the third contour line is determined. of the photocurable resin liquid in said third region within the contour, until the lower layer of the photocurable layer scanning the <br/> third said light beam at a scan rate of not cured, the second contour The photocurable resin liquid in the second region within the line is cured so as to reach the lower photocurable layer in the entire second region, and the second scan speed is lower than the third scanning speed. A first scan in which the light beam is scanned at a scanning speed, and the photocurable resin liquid in the first region between the second contour line and the first contour line reaches the lower photocurable layer. An optical shaping method of scanning the light beam along the first contour line at a velocity. 2. The photocurable resin liquid in the second and third regions is raster scanned with the light beam.
The optical modeling method according to. 3. The optical modeling method according to claim 2, wherein the photocurable resin liquid in the second and third regions is raster-scanned with the light rays in directions substantially orthogonal to each other. 4. An optical modeling method for forming a three-dimensional resin molded article by irradiating a photocurable resin solution with a light beam having a strength for curing the photocurable resin solution to sequentially form a photocurable layer. A first contour line which is the outermost portion of the photo-curable layer, and a second region along the inner side of the first contour line by approximately the dimension of the cured portion of the photo-curable resin liquid caused by irradiation of the light rays. Defining a second contour line and a third region defining the third region.
Scanning the light beam onto the photocurable resin liquid in the region of
And a third contour line along the inner side of the second contour line is determined with a gap according to the third scanning speed and the intensity of the light beam at the time of The photocurable resin liquid in the first region between the contour line and the first contour line at a first scanning speed that allows the photocurable resin liquid to reach the lower photocurable layer, and along the first contour line. scanning the light beam, the light curing resin liquid in said third region within said third contour, said light beam by said <br/> third scan speed up to the lower layer of the photocurable layer not cured Scanning, causing the photocurable resin liquid in the second region within the second contour to cure so as to reach the lower photocurable layer in the entire second region, and the third region An optical shaping method in which the light beam is scanned at a second scanning speed smaller than the scanning speed of. 5. The light beam is raster-scanned onto the photocurable resin liquid in the second and third regions.
The optical modeling method according to. 6. The optical modeling method according to claim 5, wherein the photocurable resin liquid in the second and third regions is raster-scanned with the light rays in directions substantially orthogonal to each other. 7. A photocurable resin liquid tank containing a photocurable resin liquid, and a light scanning means for generating and scanning a light beam having a wavelength suitable for curing the photocurable resin liquid. And an elevating means for elevating and lowering the cured resin generated by irradiating the surface of the photocurable resin liquid with a light beam, and a control means for controlling the light scanning means and the elevating means. In the modeling apparatus, the control unit includes a three-dimensional modeling information storage unit that stores at least a part of three-dimensional modeling information for three-dimensional modeling, and a scan hardening layer formed by scanning and irradiating the light beam without operating the elevating unit. Information regarding the scanning hardening layer information is extracted from the three-dimensional information stored in the three-dimensional modeling information storage unit, and based on the scanning hardening layer information obtained from the scanning hardening layer information extracting unit. Previous A contour line detection unit that detects a first contour line that is the outermost portion of the photocurable layer, and the photocurable resin liquid that is obtained by irradiating the first contour line obtained by the contour line detection unit with the light beam. A second contour line that defines a second region along the inner side of approximately the size of the cured portion of the, and a third region that defines the third region and scans the light beam onto the photocurable resin liquid in the third region. Third scanning speed
The second with a space according to the intensity and the intensity of the light rays .
Means for determining a third contour line along the inner side with respect to the contour line, and the photocurability in a first region between the second contour line and the first contour line. The light ray is scanned along the first contour line at a first scanning speed that causes the resin liquid to reach the lower photocuring layer, and the photocuring in the third region within the third contour line is performed. sexual resin liquid, until the lower layer of the photocurable layer scanning the light beam in the non cured third scanning rate,
The photocurable resin liquid in the second region within the second contour line is cured so as to reach the lower photocurable layer in the entire second region, and the third scanning speed is set. An optical modeling apparatus that controls the optical scanning means to scan the light beam at a second scanning speed that is smaller.