JP3396529B2 - Stereolithography - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereolithography apparatus, in particular, an uncured material having fluidity containing a photocurable resin is housed in a modeling tank, and the uncured material is selectively irradiated with light. Thus, the present invention relates to an apparatus for forming a hardened layer having a required shape and sequentially stacking the hardened layers to form a three-dimensional object.

[0002]

2. Description of the Related Art Conventionally, in this type of optical molding apparatus, an upper irradiation type of irradiating the uncured material contained in the molding tank with light from above is used, and a transparent molding apparatus provided at the bottom of the molding tank. There is a lower irradiation type in which light is irradiated to the uncured material from the lower side through a light window. An example of the top irradiation type is disclosed in Japanese Patent Laid-Open No. 3-227222. In this device, the liquid surface of the molding tank containing the uncured material is scanned with laser light to cure the uncured material liquid near the liquid surface into a desired shape on the elevating table, and the cured layer is moved to the elevating table. After it is sunk downward by descending, the next layer is bonded and laminated on it.

On the other hand, as the lower irradiation type, for example, there is one described in Japanese Utility Model Laid-Open No. 2-11331. In this device, light is applied to the uncured material layer between the translucent window at the bottom of the molding tank and the elevating table to cure the resin layer in a desired pattern, and the elevating table is separated from the translucent window by one layer at a time. While curing layers are laminated.

[0004]

However, in the conventional top-illumination type stereolithography apparatus, the height of the liquid surface is always kept constant because of the relationship with the intensity of the light that irradiates the liquid surface. It is necessary to always store a certain amount of uncured material in the molding tank. Therefore, even when the molded product is small, the same amount of uncured material as in the case where the molded product is large is used, and there is a drawback that it is easy to deteriorate or stain the very expensive uncured material. .

On the other hand, in the conventional lower-illumination type optical molding apparatus, since the light irradiation surface is at a fixed position regardless of the amount of resin in the molding tank, the amount corresponding to the size of the modeled object is reduced. There is an advantage that the resin may be stored in the modeling tank, but it is not easy to peel the cured layer laminate (model) from the light-transmitting window every time when one cured layer is formed, and the cured layer is laminated. Not only the work is difficult, but also the cured layer is easily damaged. Further, since the modeling tank is installed at a high position for lower irradiation, it is not easy to replenish the uncured material or take out the modeled object.

Further, in both types of stereolithography equipment,
When using a relatively high-viscosity photo-curable resin that has low odor and low volatility, it is on the cured layer that is lowered by one layer from the liquid level, or on the cured layer and the translucent window separated from the translucent window. It is difficult to rapidly feed the uncured material into the space for one layer between. On the other hand, for example, it is possible to move the lifting table much larger than one layer to facilitate the material supply.
The problem remains that it takes time to settle the uncured material.

The present invention has been made in order to solve the above-mentioned unsolved problems of the prior art. By adopting an upper irradiation method, the stacking work can be facilitated and the hardened layer can be prevented from being damaged, and its drawbacks can be solved. However, the first object is to provide an optical modeling apparatus capable of performing a required modeling operation with a minimum required amount of uncured material. Further, even when a relatively high-viscosity material is used, A second object is to enable a modeling work to be performed quickly.

[0008]

In order to achieve the first object, the invention according to claim 1 has an upper opening and a bottom wall.
A molding tank having an expandable bellows-shaped peripheral wall part between and containing an uncured material having fluidity including a photo-curable resin, and a bottom wall part that can be moved up and down so that the storage amount is variable,
A table that is vertically movable in the molding tank while keeping a predetermined gap with the peripheral wall and that forms an uncured material layer with a predetermined thickness on the upper surface side and selectively irradiates the uncured material layer with light. And a material supply means for supplying an uncured material to the modeling tank by dividing the material into a predetermined amount a plurality of times by a predetermined amount, and curing the light on the table. It is characterized in that the table is lowered so that the layers are sequentially laminated and an uncured material layer is formed in the vicinity of the upper opening of the modeling tank.

In order to achieve the above second object, the invention according to claim 2 is such that the material supplying means has an inclined surface that becomes deeper as it is separated from the upper opening of the modeling tank, at least in the left-right direction of the table. It moves along the material tank provided on one side, the inclined surface of the material tank and the upper opening of the molding tank, and scrapes a predetermined amount of uncured material from the material tank to the molding tank side and introduces it into the upper opening. The invention according to claim 3, wherein the dipper blade is moved to a modeling tank side from a state where the dipper blade is immersed in the deepest part in the material tank, The invention is characterized in that a predetermined amount of uncured material is weighed by causing the uncured material to overflow from the upper end portion toward the rear side in the moving direction by the movement. An uncured material layer shaping means is provided which has a doctor blade that works to spread the uncured material and smoothes the upper surface of the uncured material layer on the table, and moves the doctor blade in conjunction with a dipper blade. It is characterized by that.

[0010]

According to the invention of claim 1, the uncured material layer on the table is selectively irradiated with light by the light irradiation means,
When a hardened layer having a required shape is formed in the material layer, the table is lowered by the layer thickness of the next uncured material layer, and
The bottom wall of the modeling tank moves downward, the storage amount of the modeling tank increases by a predetermined amount, and a predetermined amount of uncured material is supplied to the modeling tank by the material supply means. Therefore, it is only necessary to prepare the uncured material in the material supply means in an amount corresponding to the capacity of the modeling tank that increases corresponding to the stacking height of the cured layer, and the expensive uncured material is used excessively. It does not deteriorate or get dirty.

According to the second aspect of the present invention, the dipper blade moves along the inclined surface of the material tank and the upper opening of the modeling tank, so that a predetermined amount of the uncured material is scraped out of the material tank toward the modeling tank. And is introduced into the upper opening. Therefore, even when a photocurable material having a relatively high viscosity is used, the material can be rapidly supplied, and a simple material supply means is provided. Further, since the liquid level in the material tank has no influence on the modeling, it is easy to replenish the uncured material.

According to the third aspect of the present invention, the dipper blade is moved from the state of being immersed in the deepest portion of the material tank to the modeling tank side, and the uncured material is overflowed from the upper end portion to the rear side in the moving direction to a predetermined amount. Weigh the uncured material. Therefore, a predetermined amount of uncured material can be easily measured and supplied without complicatedly controlling the movement of the dipper blade, and the material supply means has a simpler configuration.

In the invention according to claim 4, the uncured material layer shaping means moves the doctor blade in conjunction with the dipper blade to spread the uncured material in cooperation with the dipper blade and the uncured material on the table. The upper surface of the material layer is smoothed. Therefore, even if the uncured material has a relatively high viscosity, the uncured material is quickly spread and smoothed on the table while keeping the movement of the table only by the layer thickness.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 are views showing an embodiment of a stereolithography apparatus according to the invention described in claims 1 to 4. First, the configuration will be described.

In FIGS. 1 to 3, reference numeral 1 denotes a fluid uncured material containing a photocurable resin, for example, a liquid photocurable resin having a predetermined viscosity, or the resin having high non-contractibility. It is a material in which substances having a fine particle diameter are mixed. The photocurable resin used in this material 1 is a known resin having a property of being cured by light in the ultraviolet region (or may be light in the infrared ultraviolet region, visible light, or the like). Reference numeral 10 denotes a molding tank for containing the uncured material 1, which has an upper opening 11 having a predetermined shape (for example, a circular shape), a bottom wall portion 12 which can be moved up and down, and an expandable bellows-shaped peripheral wall portion 13 therebetween. is doing. Further, 15 is a table provided in the modeling tank 10 so as to be movable up and down, and this table 15 is a bottom wall portion 12 of the modeling tank 10.
Supported by. Bottom wall 12 and table 15 of molding tank 10
Is vertically moved relative to the upper opening 11 by an elevating and lowering drive means (not shown), and corresponds to the thickness (layer thickness) of each cured layer 2a constituting the modeled object (cured layer laminate 2) at the time of modeling. The amount of movement to be performed is defined as one movement amount, from the modeling start position shown in FIG. 2 toward the bottom of each figure (upper opening 11
A plurality of times) (in a direction away from), and when the stacking is completed, it is moved from the position at that time to the molding start position at one time. That is, the molding tank 10 is configured such that the bottom wall portion 12 can be moved up and down to make the accommodation amount variable, and when the table 15 that moves integrally with the bottom wall portion 12 of the molding tank 10 moves downward, the table 15 is moved. Upper opening of the molding tank 10 on the upper surface 15a side of the
An uncured material layer 1a having a predetermined thickness is formed inside 11 (details will be described later). The elevating and lowering drive means can be configured by using, for example, a stepping motor, a ball screw mechanism, or the like (not shown). Also, the molding tank
There is a predetermined gap between the peripheral wall portion 13 of 10 and the outer peripheral portion of the table 15 so that the peripheral wall portion 13 and the table 15 do not come into contact with each other when the bottom wall portion 12 moves up and down.

Numeral 18 indicates that the uncured material layer 1a is selectively irradiated with light so that the uncured material layer 1a has a cured layer 2 having a desired shape.
It is a light irradiation means for forming a. This light irradiation means 18 is
The light emitted from a light source (for example, a laser light source) can be shaped, reflected, deflected and condensed on the liquid surface of the uncured material 1, and can be scanned in the main and sub scanning directions orthogonal to each other.
The light emitted from the light source is light suitable for the properties of the uncured material 1, for example, light in the ultraviolet region (or light in the infrared region, visible light, etc.). Further, the drawing pattern by the light scanning of the light irradiating means 18 corresponds to each shape of the plurality of cured layers constituting the modeled object, and the liquid surface of the uncured material 1 in the modeling tank 10 and the table 15 are formed. Uncured material layer 1 between
By selectively exposing and curing a corresponding to this drawing pattern, the cured layer 2a having a required shape is formed.

On the other hand, in the vicinity of the modeling tank 10, there is provided a material supply means 20 for supplying the uncured material 1 into the modeling tank 10 by dividing the uncured material 1 into a predetermined number of times, and this material supply means 20 is a table. It is necessary to form the uncured material layer 1a in the upper opening 11 of the molding tank 10 when the table 15 is lowered so as to stack the next uncured material layer 1a on the uppermost cured layer 2a on the top 15. An amount of uncured material 1 or a slightly higher amount is supplied.

Specifically, the material supplying means 20 is a molding tank 10.
Material tanks 21L and 21R that are provided on both left and right sides (at least one side) of the table 15 and that have an inclined surface 21a that becomes deeper away from the upper opening 11 of the
Moving along the inclined surfaces 21a of L and 21R and the upper opening 11 of the molding tank 10, a predetermined amount of uncured material 1 is scraped from the material tanks 21L and 21R to the molding tank 10 side and introduced into the upper opening 11. And a dipper blade 22. The dipper blade 22 moves to the modeling tank 10 side from the state of being immersed in the deepest part 21b in the material tanks 21L and 21R, and the movement causes the uncured material 1 to overflow from the upper end 22a to the rear side in the moving direction. A certain amount of uncured material 1 can be weighed.
Alternatively, depending on the degree of fluidity (viscosity or consistency) of the uncured material 1, the lower end of the dipper blade 22 and the inclined surface
The dipper blade 22 may be moved so as to maintain a predetermined gap (a gap that increases when the viscosity of the uncured material 1 is high) with the 21a to perform the measurement.

Further, the dipper blade 22 is supported by a plurality of shafts 23 extending in the vertical direction and spaced apart in the front-back direction of the molding tank 10 (direction orthogonal to the paper surface of FIG. 1). 1. A carriage 24 that moves in the left-right direction in the middle is fitted movably in the vertical direction. Carriage 24
Is guided by a pair of front and rear parallel horizontal guides 25, and is driven in the left-right direction by a feed mechanism such as a feed screw and a motor (not shown). In addition, each shaft 23
Is connected to a cam follower member 27 that engages with a lift cam 26, and when the carriage 24 moves from the moving end on one of the left and right sides to the modeling tank 10 side, the dipper blade 22 causes the inclined surface of each material tank 21L, 21R. The shaft 23 is lifted by the lift cam 26 so as to move along the opening 21a and the upper opening 11 of the modeling tank 10.

Further, a pair of left and right doctor blades 31, 32 are mounted on the carriage 24 in parallel so as to be at the same height. These doctor blades 31 and 32 move together with the carriage 24 when the dipper blade 22 moves to the left and right in conjunction with the carriage 24, and the material tank
The uncured material 1 scraped out from either 21L or 21R is spread near the dipper blade 22 and the table
The upper surface of the uncured material layer 1a on 15 is smoothed. That is, the shaft 23, the carriage 24, the horizontal guide 25, the lift cam 26, the cam follower member 27, and the feeding mechanism cooperate with the dipper blade 22 by moving the dipper blade 22 and the doctor blades 31, 32 in an interlocking manner. The uncured material layer shaping means 30 for shaping the uncured material layer 1a is constituted.

In this embodiment, a three-dimensional CAD system is used to design a modeled object (three-dimensional object) which is the laminate 2, and the light irradiation means 18 is used based on the modeling data including each layer shape of the modeled object. The drawing pattern and the amount of movement of the table 15 by the elevating and lowering means, and the data necessary for the operation of the material supplying means 20 and the uncured material layer shaping means 30 are created, and the data controls the respective means (not shown). It is stored in the storage unit of the control device. Further, this control device calculates the scanning amount of the light irradiation means 18 in both the main and sub scanning directions from the drawing pattern data, and the table 15, the light irradiation means 18, the material supplying means 20, and the uncured material layer shaping means. The operation timing of 30 is set, and those data are retained in the storage unit.

Next, the operation will be described. In this embodiment, the table 15 is positioned at the modeling start position shown in FIG. 2 and the uncured material 1 is stored in the modeling tank 10 and the material tanks 21L and 21R prior to the modeling operation. If a cylindrical member slidably fitted to the outer peripheral surface of the table 15 is fixedly provided on the upper opening 11 side of the molding tank 10, the uncured material 1 is stored in the molding tank 10. No work required.

Next, the control device controls the operations of the elevating and lowering drive means, the light irradiation means 18, the material supply means 20, and the uncured material layer shaping means 30 to start the molding operation. First, move the table 15 to the upper opening 11 from the molding start position 1
A dipper blade is operated by moving the material supplying means 20 and the uncured material layer shaping means 30 while lowering the layer.
22 and doctor blades 31, 32 to the material tanks 21L, 21
Either one of R, for example, the material tank 21L side is moved to the modeling tank 10 side. At this time, the dipper blade 22
Is the deepest part 21 in one of the material tanks 21L (or 21R)
While being immersed in b, it is moved to the modeling tank 10 side along the inclined surface 21a while being interlocked with the carriage 24 and being lifted by the lift cam 26, and the uncured material 1 is moved from the upper end 22a to the rear side in the moving direction. The uncured material 1 is weighed by overflowing (or further by letting the uncured material 1 from the gap between the inclined surface 21a) (state shown in FIG. 2).

Next, the dipper blade 22 is further moved to the modeling tank 10 side, so that one of the material tanks 21L (or
21R), the amount of uncured material 1 necessary for forming the uncured material layer 1a or slightly larger than that is scraped out to the molding tank 10 side, and the doctor blade 32 (or 31) and the dipper blade 22 on one side It is introduced into the upper opening 11 from the space. In addition, the dipper blade 22 moves along the upper opening 11, and the doctor blades 31, 32 (in particular, the one on the rear side in the moving direction) that moves integrally with the carriage 24 cooperate with the dipper blade 22 to be placed on the table 15. The upper surface of the uncured material 1 is smoothed while being spread, and the upper surface is the upper opening
The uncured material layer 1a is shaped in (near) the upper opening 11 so as to have the same height. The surplus uncured material 1 is scraped out from the upper opening 11 to the other material tank 21R (or 21L) by the dipper blade 22 and the doctor blades 31 and 32, and is stored therein. Further, when only one of the left and right material tanks (21L or 21R) is provided in the material tank, the surplus uncured material 1 flows through the upper opening 11 and then flows through a toy (not shown) again. It is stored in the material tank.

Next, the dipper blade 22 and the doctor blades 31, 32 pass over the upper opening 11, and the dipper blade 22 descends along the inclined surface 21a of the other material tank 21R (or 21R) to reach the deepest portion 21b. Move to the right (or left) with the carriage 24 until it is reached. on the other hand,
When the uncured material layer 1a having a predetermined layer thickness is formed on the table 15, the uncured material layer 1a on the table 15 is scanned with light by the light irradiation means 18 to selectively irradiate the uncured material layer 1a. A hardened layer 2a having a required shape is formed in the layer 1a. This light irradiation is opened by the dipper blade 22 at the top.
You may go after passing 11 and before reaching the deepest part 21b.

Next, the table 15 together with the bottom wall portion 12 of the modeling tank 10 is lowered by the layer thickness of the next uncured material layer 1a, and the capacity of the modeling tank 10 is increased by a predetermined amount.
Thus, the uncured material 1 for forming the next uncured material layer 1a is supplied from the other material tank 21R (or 21L) side to the modeling tank 10 in the same manner as described above, and the uncured material layer shaping means is provided. The uncured material 1 is spread on the cured layer 2a (the lower material layer including the layer) by 30 and the next uncured material layer 1a is shaped.

Thereafter, the same light irradiation and table as described above are used.
The descending operation of 15 and the work of forming the uncured material layer 1a by the material supply means 20 and the uncured material layer shaping means 30 are repeated. If the uncured material 1 is likely to run short in the course of modeling, the uncured material 1 is appropriately replenished in the material tanks 21L and 21R. Then, a plurality of hardened layers 2a are laminated on the table 15, and a three-dimensional object as a laminate is formed,
When a series of stacking work is completed, the table 15 returns upward to the modeling start position, and the modeled object can be taken out from the table 15.

As described above, in this embodiment, the uncured material in an amount sufficient to fill the voids in the molding tank 10 in the initial state,
The material tanks 21L and 21R are made of uncured material that is commensurate with the capacity of the modeling tank 10 that increases corresponding to the stacking height of the hardened layer 2a.
Therefore, it is not necessary to store the uncured material in a full molding tank in order to maintain the height of the liquid surface to be irradiated with light as in the case of the conventional top irradiation method. Therefore, an optical modeling apparatus capable of performing the required modeling work with the minimum amount of uncured material while eliminating the drawbacks while aiming at the easiness of stacking work and the prevention of damage to the hardened layer, which are advantages of the top irradiation method. Becomes In addition, since the liquid level in the material tanks 21L and 21R does not affect the molding at all, the uncured material 1 can be easily supplied to the material tanks 21L and 21R (at least one tank) without being too careful during the molding. can do. Further, by simply changing the dimension of the dipper blade 22 in the vertical direction in FIG. 1 according to the fluidity of the uncured material 1, it is possible to adjust the moving range and the vertical position of the dipper blade 22 without complicated control. The hardened material 1 can be easily measured and supplied to the modeling tank 10, and even when the uncured material 1 having a relatively high viscosity is used, the material can be rapidly supplied, and further, the material supply can be performed. The means 20 has a simple structure. Further, the uncured material layer shaping means 30 moves the doctor blades 31 and 32 in conjunction with the dipper blade 22, and cooperates with the dipper blade 22 to extend the uncured material 1 and the uncured material on the table 15. Since the upper surface of the layer 1a is smoothed, even if the uncured material 1 has a relatively high viscosity, it is not necessary to form the uncured material layer by making the table movement amount much larger than the layer thickness. The uncured material 1 can be rapidly spread and smoothed on the table 15 at the time of supplying the material while keeping the descending amount of the table 15 only for the layer thickness.

In the above-described embodiment, the pair of material tanks 21L and 21R are provided on both left and right sides of the molding tank 10, but only one of the material tanks 21L and 21R is provided and the dipper blade 22 is used. Needless to say, it may be configured to reciprocate every time. Further, the molding tank in the present invention is not limited to the one in which the peripheral wall portion is expandable / contractible as in the above-mentioned embodiment, and for example, as shown in FIG. 4, a piston 42 that moves up and down is provided in the cylinder 41. It is also possible to use the modeling tank 40 having 42 as the bottom wall. The point is that the amount of accommodation can be changed by moving the bottom wall portion up and down. Of course, the table 15 in the above embodiment
The upper opening is slidably fitted to the outer periphery within the lifting range of
A combination is also possible in which a cylinder forming 11 is provided, and a peripheral wall portion that can expand and contract like the peripheral wall portion 13 is provided below the cylinder.

[0030]

According to the first aspect of the present invention, while adopting the upper irradiation method, it is sufficient to prepare an uncured material corresponding to the size of the modeled object, instead of always filling the modeling tank.
We provide a stereolithography system that is capable of performing the required modeling work with the minimum amount of uncured material while eliminating the drawbacks while aiming for ease of stacking work and prevention of damage to the hardened layer, which are advantages of the top irradiation method. can do.

According to the second aspect of the invention, the dipper blade is moved along the inclined surface of the material tank and the upper opening of the modeling tank so that a predetermined amount of uncured material is scraped out from the material tank to the modeling tank side. Therefore, even when an uncured material having a relatively high viscosity is used, the material can be rapidly supplied, and the material supply means can be simply configured. Further, since the height of the liquid surface in the material tank has no influence on the modeling, the uncured material can be easily replenished to the material tank even during modeling.

According to the third aspect of the invention, the dipper blade is moved from the deepest portion in the material tank to the modeling tank side, and the uncured material is weighed while overflowing the uncured material from the upper end portion thereof. A predetermined amount of uncured material can be easily measured without complicatedly controlling the movement of the blade, and the material supply means can have a simpler configuration.

According to the invention as set forth in claim 4, the uncured material layer shaping means having a doctor blade for spreading the uncured material in cooperation with the dipper blade and smoothing the upper surface of the uncured material layer on the table. Since the uncured material has a relatively high viscosity, the uncured material can be quickly spread and smoothed on the table while keeping the movement of the table only for the layer thickness.

[Brief description of drawings]

FIG. 1 is a front sectional view showing the overall configuration of an embodiment of a stereolithography apparatus according to the present invention.

FIG. 2 is a diagram showing a state of the modeling tank at the start of modeling.

FIG. 3 is a diagram showing a state of the modeling tank during the modeling work.

FIG. 4 is a cross-sectional view showing another aspect of the modeling tank.

[Explanation of symbols] 1 uncured material 1a uncured material layer 2a Hardened layer 10, 40 modeling tank 11 Top opening 15 tables 18 Light irradiation means 20 Material supply means 21L, 21R material tank 21a Inclined surface 21b deepest part 22 dipper blade 23 shaft 24 carriage 25 Horizontal guide 26 lift cam 27 Cam follower member 31, 32 Doctor blade 31, 32 30 Unhardened material layer shaping means 42 Piston (bottom wall)

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 67/00

Claims (4)

(57) [Claims] 1. A telescopic device between the upper opening (11) and the bottom wall (12).
A bottom wall portion (12) having an existing bellows-shaped peripheral wall portion (13 ) for accommodating a fluid uncured material (1) containing a photocurable resin.
The molding tank (1
0) and the peripheral wall portion (13) in the modeling tank (10) so as to be vertically movable while maintaining a predetermined gap, and the uncured material layer (1a) having a predetermined thickness is formed on the upper surface side of the table ( 15), a light irradiation means (18) for selectively irradiating the uncured material layer (1a) with light to form a cured layer (2a) having a desired shape in the material layer (1a), and an uncured material Modeling tank (10) by dividing the material (1) into multiple parts by a predetermined amount
And a material supply means (20) for supplying the material to the inside, and lowering the table (15) so as to sequentially stack the hardened layer (2a) on the table (15) and opening the upper opening (11) of the modeling tank (10). ), An uncured material layer (1a) is formed in the vicinity thereof. 2. The material supply means (20) has an inclined surface (21a) which becomes deeper as it is separated from the upper opening (11) of the modeling tank (10), and at least on one side in the left-right direction of the table (15). Material tanks (21L, 21R) provided, inclined surfaces (21a) of the material tanks (21L, 21R), and modeling tank
Move along the upper opening (11) of the (10) and open the material tank (21
L, 21R) A predetermined amount of uncured material (1) is molded into the molding tank (10)
The stereolithography apparatus according to claim 1, further comprising a dipper blade (22) that is scraped to the side and introduced into the upper opening (11). 3. The dipper blade (22) moves from the state of being immersed in the deepest part (21b) in the material tank (21L, 21R) to the modeling tank (10) side, and by the movement, the upper end ( 22a)
The stereolithography apparatus according to claim 2, wherein the uncured material (1) is overflowed to the rear side in the moving direction and a predetermined amount of the uncured material (1) is weighed. 4. A doctor blade (31) for cooperating with the dipper blade (22) to spread the uncured material (1) and smooth the upper surface of the uncured material layer (1a) on the table (15). , 32) having an uncured material layer shaping means (30) for moving the doctor blade (31, 32) in conjunction with the dipper blade (22). Modeling equipment.