JP2018043462A - Three dimensional molding device and manufacturing method of three dimensional molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress solidification and fastening of a photocurable resin and viscosity reduction around a transmission window of curing light (molding light) and enable a molding stage and a molded part moving easily at high speed.SOLUTION: A three dimensional molding device has: a container 5 for accommodating a photocurable resin 1; a molding stage 3 for supporting a solid molded article by photocuring the photocurable resin 1 in a liquid state; a light source 8 for irradiating curing light which photocures the photocurable resin 1; a mirror unit 9 and a lens unit 10. The curing light is irradiated to the photocurable resin 1 of a molding area 11 via a light transmission plate 6. An oxygen absorptive film 12 as a carrying member of solidification inhibiting gas is arranged between the light transmission plate 6 and the photocurable resin 1, and the oxygen absorption film 12 is transported between the light transmission plate 6 and the photocurable resin 1 by a guide roller 12a and a winding device 15.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a three-dimensional modeling apparatus for manufacturing a three-dimensional structure by irradiating a photocurable resin accommodated in a container with light, and a method for manufacturing the three-dimensional structure.

  In recent years, development of a three-dimensional modeling technique for forming a modeled object by repeating a process of exposing and solidifying (curing) an uncured photocurable resin has been advanced. In this type of three-dimensional modeling apparatus, a configuration is known in which a photocurable resin of a material is applied to a modeling stage or a solidified modeled object (work) one by one with an application roller or the like, and light irradiation is repeated. In addition, a modeling stage (or a modeled part of a modeled object) is immersed in a photocurable resin contained in a container, and light irradiation is performed from below or above to perform layer modeling, and a modeling stage for modeling the next layer There is also known a configuration for moving the upper or lower side.

  The latter configuration does not use a coating mechanism like the former configuration, so there is an advantage that, for example, the mechanical configuration and control of the modeling apparatus is simple, but the modeling speed in the stacking direction is a problem. (Patent Document 1). One of the factors that reduce the modeling speed is a problem that the photocurable resin is fixed (or increased in viscosity) in a resin container, for example, a portion of a light transmitting member that transmits cured light, depending on modeling conditions. In this case, for example, when one stage is formed and then the stage is moved up and down for the next layer, it is necessary to forcibly peel off the part where sticking or viscosity increase has occurred. Decreases. There is also a problem that a large driving force is required for the moving device of the modeling stage. Another factor that reduces the modeling speed is that when the modeling stage is moved after modeling one layer, the photocurable resin is supplied to the space that forms the next modeling layer, depending on the modeling conditions. Is a problem that does not happen quickly.

  In order to facilitate the peeling of the light transmission surface or light irradiation surface and the light solidified layer, the light transmission surface or light irradiation surface portion is made of a movable film material. The structure which performs photocuring is proposed (patent document 2).

  In addition, there has been proposed a method of forming a state that inhibits the curing (polymerization) of the photocurable resin in a specific region of the container, for example, a spatial region in the vicinity of the light transmitting member that transmits the curing light (Patent Document 3). . In this configuration, for example, a light transmissive member facing the photocurable resin in the container is formed of a gas permeable member, and a gas (for example, oxygen) that inhibits the curing (polymerization) of the photocurable resin into the photocurable resin from the outside. Permeate those containing atoms). According to this configuration, curing (polymerization) of the photocurable resin is prevented in the space near the light transmitting member by the gas that has passed through the gas transmitting member. Therefore, the fixing to the light transmission member and the stage moving speed are reduced, and the decrease in the supply speed of the molten resin for the next layer is suppressed. With such a configuration, there is a possibility that continuous and high-speed layered modeling operation can be performed by, for example, irradiating curing light as a moving image and performing continuous stage movement.

US Patent Application Publication No. 2015/54198 JP 2006-1259 A U.S. Pat. No. 9,216,546

  However, in the configuration in which the solidified (or increased viscosity) portion is peeled off while moving the film as in Patent Document 2, the peel resistance increases due to the cured area, and the hardened layer is caused by the problem of difficulty in peeling or the load at the time of peeling. There was a problem of deformation.

  In particular, since the thickness of the oxygen-inhibiting layer is as thin as about 0.02 mm to 0.2 mm in the modeling method in which the curing light is continuously irradiated in a moving image format and the modeling stage is continuously moved synchronously with this, It took time to sequentially feed the material in its thinness.

  Therefore, in order to increase the supply speed of the photo-curing resin, a technique for reducing the cross-sectional area in each layer of the modeled object or dividing the modeled object into a plurality of blocks is performed. In addition, measures to use a low viscosity material for the photocurable resin may be taken. In order to reduce the cross-sectional area in each layer of the modeled object, for example, if the modeled layer is made small or divided like a lattice structure, there arises a problem that the strength of the modeled product is lowered. In the first place, a structure such as a lattice shape may not necessarily match the structure of an intended model to be manufactured.

  In addition, when using a material with low viscosity for the photocurable resin, there is a problem that the shrinkage at the time of solidification increases and deformation of the molded article, or the degree of polymerization at the time of photocuring does not increase, resulting in a decrease in strength, There is a possibility that problems such as low heat resistance may occur.

  Therefore, in order to speed up the material supply to the solidified layer using a material with low viscosity, there is also a method of rapidly executing the modeling phase that performs photocuring by moving image projection etc. and performing the post cure method as a post-processing step after the modeling phase It is considered. In this post-cure method, in order to increase the strength of the resin, a step of curing the uncured portion by applying light or heat is performed. However, when secondary curing is performed by post-cure, problems such as dimensional changes and deformation during curing may occur.

  As described above, taking into consideration the supply rate of the photocurable resin, it is not an essential solution to subdivide the shaped article (solidified layer) or reduce the viscosity of the photocurable resin. In addition, there are problems that various other undesirable side effects occur. For this reason, when performing solid modeling with a small amount of lightening parts without reducing the viscosity of the photo-curing resin, it has conventionally been in a narrow space for the next layer after moving the stage. The filling time of uncured material with high precision tends to increase.

  Further, even in a method of allowing a curing-inhibiting gas to permeate as in Patent Document 3, in the case of a high-viscosity resin or a one-layer shaped article having a large irradiation (curing) area, for example, a next layer having a thickness of 25 to 35 μm It is not so easy to shorten the time for filling the space for the material.

  In view of the above problems, an object of the present invention is to easily and rapidly form a modeling stage and a molded article while suppressing the solidification, fixation, and viscosity reduction of the photocurable resin in the vicinity of a light transmitting member that transmits the curing light. It is to be able to move the part.

  In order to solve the above-described problems, in the three-dimensional modeling apparatus of the present invention, a container that contains a photocurable resin, a base that supports a molded part where the photocurable resin is photocured, and the base A moving device for moving the light, a light irradiation device for irradiating light for photocuring the photocurable resin, a light transmissive member provided between the light irradiation device and the base, and the photocurable property Facing the resin, a supply member that supplies a gas having curing inhibition to the photocurable resin, and a transport device that moves the supply member between the light transmitting member and the photocurable resin; The structure with was adopted.

  With the above configuration, the present invention moves the modeling stage and the modeled part easily and at high speed while suppressing the solidification, fixation, and viscosity reduction of the photocurable resin in the vicinity of the light transmitting member that transmits the curing light. be able to.

It is explanatory drawing which showed the structure of the three-dimensional modeling apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which expanded and showed the modeling area vicinity of FIG. It is explanatory drawing which showed the structure of the three-dimensional modeling apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing which showed the cross-section of the supply member which supplies hardening inhibitory gas. It is explanatory drawing which showed the structure of the three-dimensional modeling apparatus which concerns on Embodiment 3 of this invention. It is the block diagram which showed the structural example of the control system of the three-dimensional modeling apparatus which concerns on this invention. It is the flowchart figure which showed the three-dimensional modeling control procedure which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to embodiments shown in the accompanying drawings. The following embodiment is merely an example, and for example, a detailed configuration can be appropriately changed by those skilled in the art without departing from the gist of the present invention. Moreover, the numerical value taken up by this embodiment is a reference numerical value, Comprising: This invention is not limited.

<Embodiment 1>
FIG. 1 shows a configuration of a three-dimensional modeling apparatus for manufacturing a three-dimensional modeled object as a cross-sectional structure in the first embodiment. In FIG. 1, a photocurable resin 1 in a molten (uncured) state is accommodated in a container 5.

  The photocurable resin 1 is, for example, an acrylate material as a radical polymerization resin material. Particularly in that case, the material of the photocurable resin 1 is selected from urethane acrylate, epoxy acrylate, polyester acrylate, acrylic acrylate, and the like as the oligomer.

  In the present embodiment, light is transmitted from above the container 5 through a light transmission plate 6 and a supply member that supplies a gas having a curing inhibition property to the photocurable resin 1 such as an oxygen adsorption film 12 described later. Light irradiation for curing the curable resin 1 is performed. The oxygen adsorbing film 12 as the gas supply member having the curing inhibition property can be made of a flexible material that can be wound into a film shape or a shape like a film roll 13 described later. A more detailed configuration example of the oxygen adsorption film 12 will be described later.

  The modeling stage 3 functions as a base for supporting the molded part of the modeled object 2, and the modeling stage 3 is moved downward by the lifting device 4 as the modeled object 2 is solidified and the modeling proceeds. As the modeling stage 3 moves, the photocurable resin 1 for the next layer is supplied above the molded part of the model 2. Then, the next layer is irradiated with light for modeling.

  The curing light is irradiated from a light irradiation unit including a light source 8, a mirror unit 9, and a lens unit 10, for example. The light source 8 is, for example, a laser light source, and when the photocurable resin 1 is, for example, an ultraviolet curable type, the wavelength of the irradiation light of the light source 8 is suitable for conditions such as the material of the photocurable resin 1, for example. It is selected in the range of about 200 to 400 nm. As a typical light wavelength of the curing light, 254 nm or 365 nm is used. However, the wavelength of the irradiation light of the light source 8 is not necessarily limited to the ultraviolet region, and irradiation light in other wavelength regions may be used depending on the material of the photocurable resin 1. The mirror unit 9 is constituted by a galvanometer mirror unit or the like, and scans the irradiation spot of the light source 8 in the XY directions via the lens unit 10. Thereby, the site | part corresponding to the shape for one layer corresponding to the specific height of the molded article 2 of the photocurable resin 1 can be hardened.

  Further, the light irradiation unit including the light source 8, the mirror unit 9, and the lens unit 10 is not limited to the light irradiation method by plane scanning of the laser spot, but depending on characteristics such as the material and viscosity of the photocurable resin 1. You may comprise as a projector which irradiates an image surface.

  In the configuration of FIG. 1, since light irradiation for curing the photocurable resin 1 is performed from above the container 5, a light transmissive member made of a light transmissive material, that is, a light transmissive material, is formed on the top of the container 5. Place the lid. In FIG. 1, the light transmitting plate 6 corresponds to this light transmitting lid. Further, the side wall portion of the container 5 can also be made of a light-transmitting material for the purpose of visually recognizing the progress of modeling or photographing with a camera (not shown).

  The light transmissive plate 6 is made of a light transmissive material such as PTFE, PFA, PE, PP, PC, PMMA, quartz, or glass.

  In the present embodiment, the uncured and liquid photocurable resin 1 can be supplied by the supply device 7 so that the liquid level is at the lower surface of the light transmission plate 6 or at a very close height. For example, the supply device 7 is configured to automatically supply the photocurable resin 1 into the container 5 in accordance with the output of a liquid level detection unit (not shown) that detects the liquid level of the photocurable resin 1. May be.

  In the present embodiment, the oxygen adsorbing film 12 is transported on the lower surface of the light transmission plate 6 so that almost the entire lower surface of the light transmission plate 6 is not directly touched by the photocurable resin 1. For this reason, the oxygen adsorption film 12 has a width substantially corresponding to the lower surface of the light transmission plate 6. Here, the “width” direction of the oxygen adsorption film 12 is a dimension corresponding to the depth direction of FIG.

  The oxygen adsorbing film 12 has a gas adsorbing property and corresponds to a supply member that supplies a gas having a curing inhibiting property to the photocurable resin 1. The gas having a curing inhibitory property is a gas containing an allotrope such as oxygen as a simple substance, that is, oxygen or ozone, for example, pure oxygen or air. However, for example, when a material different from the above-mentioned acrylic acrylate type is used for the photocurable resin 1, a material other than oxygen as a simple substance is included as a gas having a curing inhibition property for the material. Can be used. In that case, as the oxygen adsorbing film 12 of this embodiment, a film having an adsorptive property to a gas having a curing inhibition property containing a substance other than oxygen as the simple substance is used.

  FIG. 4 shows an example of a cross-sectional structure of the oxygen adsorption film 12. In the example of FIG. 4, it is comprised from three layers of the gas permeable layer 23 arrange | positioned at the modeling area | region 11 side, the oxygen adsorption layer 22, and the hard layer 24 arrange | positioned at the light transmissive board 6 side.

  As the oxygen adsorption layer 22 of the oxygen adsorption film 12, for example, a perfluoro compound, iron powder, activated carbon, or a thermoplastic resin filled with these is used. Further, as the gas permeable layer 23, polyvinylidene chloride-coated biaxially stretched polypropylene, polyvinylidene chloride-coated polyester, or the like is used. The total thickness of the oxygen adsorption film 12 is about 0.02 mm to 0.2 mm. However, the total thickness of the oxygen adsorbing film 12 may be appropriately selected in consideration of the size of the modeling area, the type of resin, the viscosity, and the wettability, strength, oxygen inhibition, and the like.

  In the configuration of FIG. 1, the hard layer 24 is in contact with the light transmission plate 6, and the gas transmission layer 23 is in contact with the photocurable resin 1 in the container 5. When a radical polymerization system or an acrylate system is used for the photocurable resin 1, oxygen and ozone held by the oxygen adsorption layer 22 of the oxygen adsorption film 12 are uncured in contact with the oxygen adsorption film 12 through the gas permeable layer 23. Curing of the photocurable resin 1 is inhibited. That is, even when the curing light is irradiated, the curing of the photocurable resin 1 in the vicinity of the modeling region 11 is inhibited.

  The thickness of each layer of the oxygen adsorption film 12 can be variously changed according to the type and viscosity of the resin used and the supply amount of oxygen and ozone to the film. For example, the gas permeable layer 23 may have a range of 0.005 mm to 0.1 mm, the oxygen adsorption layer 22 may have a range of 0.01 mm to 0.3 mm, and the hard layer 24 may have a range of 0.005 mm to 0.3 mm.

  The hard layer 24 may be made of a gas permeable material such as polyvinylidene chloride-coated biaxially stretched polypropylene or polyvinylidene chloride-coated polyester, which has a higher hardness than the gas permeable layer 23. Thereby, hardening of resin which entered between the hard layer 24 and the light transmissive board 6 can be suppressed.

  The oxygen adsorbing film 12 is unwound by the winding force of the winding device 15 from the state wound in the form of the film roll 13, and between the light transmission plate 6 and the uncured resin, particularly the light transmission plate 6. It is conveyed so as to pass through the lower surface. Inside the winding device 15, a winding roller (not shown), an electric motor for generating a winding driving force, a speed reducer for forming an appropriate winding speed, and the like are arranged.

  The oxygen adsorbing film 12 is conveyed by a winding device 15 that generates a driving force for unwinding the roll-shaped oxygen adsorbing film 12, and an oxygen adsorbing that is unwound between the light transmission plate 6 and the photocurable resin 1. Guide rollers 12a for guiding the film 12 are provided.

  That is, the conveyance path of the oxygen adsorption film 12 is defined by the guide rollers 12a, 12a. The oxygen adsorbing film 12 passes through the slit 6 a penetrating the vicinity of the right end portion of the light transmission plate 6 in the drawing and enters the lower surface of the light transmission plate 6. The oxygen adsorption film 12 that has passed through the lower surface of the light transmission plate 6 passes through the slit 6a penetrating the vicinity of the left end of the light transmission plate 6 and again passes above the light transmission plate 6 to guide the guide roller 12a, It winds up by the winding device 15 through 12a ....

  The oxygen adsorbing film 12 passes through the gas supply device 14 disposed downstream of the film roll 13 and upstream of the slit 6 a on the carry-in side to the lower surface of the light transmission plate 6. The gas supply device 14 supplies a gas that inhibits the polymerization or cross-linking of the photocurable resin 1, and thus the curing thereof, and adsorbs it on the oxygen adsorption film 12. The gas supplied by the gas supply device 14 is, for example, a gas containing oxygen as a simple substance, for example, air, a gas containing pure oxygen, or ozone. The gas supply device 14 can be configured by, for example, a corona discharge or streamer discharge type ozone generator, or an oxygen supply device that supplies pure oxygen from a container such as a cylinder. The oxygen and ozone supplied from the gas supply device 14 to the oxygen adsorption film 12 may be generated not only by electrical driving but also by a chemical generation method.

  The oxygen and ozone supplied by the gas supply device 14 pass through the gas permeable layer 23 shown in FIG. 2, reach the oxygen adsorption layer 22, and are adsorbed by the perfluoro compound, iron powder, and activated carbon in the oxygen adsorption layer 22. Retained. The control conditions such as the amount of oxygen supplied from the gas supply device 14 to the oxygen adsorption film 12 and the transport speed of the oxygen adsorption film 12 by the winding device 15 depend on the type, density, and viscosity of the photocurable resin 1. Can be determined. For example, the conveyance speed of the oxygen adsorption film 12 on the lower surface of the light transmission plate 6 can be selected from a value of about several mm to several tens mm / s.

  FIG. 2 is an enlarged view of the structure near the modeling region 11 in the configuration of FIG. In the structure of FIG. 2, the light exit surface 16 of the light transmissive plate 6 is configured as a gentle curved surface by a convex surface that is convex in the direction of the photocurable resin 1, for example, a cylindrical surface. Due to the curved surface structure of the emission surface 16, the light transmission plate 6 can be optically functioned as a convex lens.

  The oxygen adsorption film 12 is conveyed from the right to the left in the drawing along the emission surface 16 of the light transmission plate 6 having a curved surface configuration by the driving force of the winding device 15. With such a curved surface structure of the emission surface 16, the oxygen adsorption film 12 can be conveyed while being in close contact with the light transmission plate 6.

  Further, by appropriately designing the curved surface shape of the emission surface 16, it is possible to prevent distortion of the curing light that is scanned by, for example, the mirror unit 9 and travels toward the periphery of the modeling region 11. For example, by appropriately selecting the curved surface shape of the exit surface 16, it is possible to prevent the peripheral portion from being distorted when the curing light spreads, and to allow the curing light to penetrate vertically over the entire target cured layer. As described above, by appropriately selecting the curved surface shape of the emission surface 16, the curing light can be irradiated vertically without distorting the entire cured layer. Equal photocuring shape accuracy can be obtained.

  By irradiating the curing light from the light source 8, the photocurable resin 1 is cured at the site of the modeling region 11 below the light transmission plate 6 and the oxygen adsorption film 12. In the case of continuous modeling, for example, the modeling stage 3 can be continuously lowered by the lifting device 4 while irradiating the curing light from the light source 8 in the form of a moving image. Further, in the case of intermittent modeling by one layer, after the mirror unit 9 performs plane scanning of the curing light at the site of the modeling region 11 to model one layer, the lifting device 4 moves the modeling stage 3 to an appropriate distance, for example, 0. Move it down 02 mm to 0.2 mm.

  In the present embodiment, when the modeling stage 3 is moved, the film winding device 15 is operated simultaneously with the stage movement or after the movement is completed, and the oxygen adsorption film 12 is conveyed on the lower surface of the light transmission plate 6. That is, the gas adsorption device 12 sequentially carries in the lower surface of the light transmission plate 6 the oxygen adsorbing film 12 that has newly adsorbed a gas having curing inhibition properties such as oxygen and ozone. Thereby, the gas which has hardening inhibitory property near the modeling area | region 11, for example, oxygen and ozone, can be supplied.

  FIG. 5 shows the configuration of the control system of the modeling apparatus of FIG. 1 (the same applies to the configuration of Embodiment 2 in FIG. 3 described later).

  In the configuration of FIG. 6, a ROM 602, a RAM 603, interfaces 604 and 608, a network interface 609, and the like are arranged around a CPU 601 responsible for the main function of the control device.

  The CPU 601 is connected to a ROM 602, a RAM 603, and various interfaces 604, 608, and 609. The ROM 602 stores basic programs such as BIOS. The storage area of the ROM 602 may include a rewritable device such as E (E) PROM. The RAM 603 is used as a work area for temporarily storing the calculation processing result of the CPU 601. The CPU 601 executes a later-described modeling control procedure by executing a program recorded (stored) in the ROM 602.

  When a program for executing the modeling control procedure described later is recorded (stored) in the ROM 602, this recording medium constitutes a computer-readable recording medium storing a control procedure for carrying out the present invention. Note that a program for executing the control procedure described later is stored in a fixed recording medium such as the ROM 602 or a removable computer-readable recording medium such as various flash memories or optical (magnetic) disks. May be. Such a storage form can be used when a program for executing a control procedure for carrying out the present invention is installed or updated. Further, when installing or updating such a control program, a method of downloading a program from the network 611 via the network interface 609 can be used in addition to using the removable recording medium as described above.

  The CPU 601 can communicate with other resources on a network (not shown) that communicates using a protocol such as TCP / IP connected via the network interface 609 via the interface 609. The network interface 609 can be configured by various network communication methods such as a wired connection (such as IEEE 802.3) and a wireless connection (such as IEEE 802.xx). A modeling control program described later can be downloaded from a server arranged in the network 611 and installed in the ROM 602 or the HDD 604, or an already installed program can be updated to a new version.

  Three-dimensional (3D) data for three-dimensionally (3D) modeling the modeling object 2 is transmitted from the host device 610 via the interface 608 in a data format such as 3DCAD, for example. The interface 608 can be configured based on various serial or parallel interface standards, for example. The host device 610 can also be connected to the network 611 as a network terminal. In this case as well, the host device 610 can supply modeling data to the modeling apparatus as described above.

  The CPU 601 controls the light source 8 and the mirror unit 9 via the interface 604 and the light irradiation control unit 605. The CPU 601 controls the lifting / lowering of the lifting device 4 via the interface 604 and the stage control unit 607. The CPU 601 controls the gas supply device 14 and the winding device 15 via the interface 604 and the film control unit 606. CPU601 advances the whole modeling process by controlling these each part according to a predetermined modeling sequence.

  The interface 604 can be configured based on various serial or parallel interface standards, for example. In FIG. 6, the interface 604 is shown as one block for simplification. However, the interface 604 may be configured by interface circuits having different communication schemes according to the communication specifications of each unit illustrated on the right side of the interface 604.

  Next, the operation in the above configuration will be described with reference to FIG. 1, FIG. 2, and FIG. FIG. 7 shows the flow of the modeling control procedure in the apparatus of FIG. 7 is described as a control program that can be read and executed by the CPU 601 (control device: computer), for example, and can be stored in, for example, the ROM 602 (or an external storage device not shown).

  Prior to modeling, the supply device 7 supplies the photocurable resin 1 in a dissolved (uncured) state into the container 5. Alternatively, this procedure may be performed manually by the operator. In the configuration in which the photocurable resin 1 is supplied by the supply device 7, the photocurable resin 1 in the container 5 is changed according to the output of an appropriate liquid level detecting means for detecting the liquid level of the photocurable resin 1. Automatic control may be performed so that the amount is automatically controlled to an appropriate amount. Further, when the supply device 7 is arranged, a resin recovery device that sucks and discharges the photocurable resin 1 from the container 5 is added, and the light is transferred from the resin recovery device to the resin supply device and again to the container 5. A configuration in which the curable resin 1 is circulated may be employed.

  The 3D modeling data of the model 2 is transmitted in advance from the host device 610 or the like. By converting the 3D modeling data into, for example, (cross-sectional) shape data of a plurality of modeling layers, modeling data for a plurality of layers constituting the model 2 is generated. When the photocurable resin 1 is supplied into the container 5 and the modeling data of the model 2 to be modeled is acquired, the CPU 601 determines whether or not modeling is started in step S0 of FIG. This determination of modeling start is performed by determining whether a modeling start command has been received from the host device 610 or the like, or by determining whether a predetermined modeling start operation has been performed on an operation panel (not shown). Do by.

  The steps shown in steps S10 and S13 in FIG. 7 correspond to a control procedure for modeling one layer of the modeled object 2. That is, these steps are light irradiation (S10) and modeling stage movement (S13). By repeatedly executing steps S10 to S15, the modeled object 2 can be modeled in a stacked manner.

  In step S <b> 10 of FIG. 7, the CPU 601 turns on the light source 8 via the light irradiation control unit 605 and causes the mirror unit 9 to scan the irradiation light of the light source 8 according to the shape of the modeling layer. Thereby, the curing light from the light source 8 is transmitted from the mirror unit 9 and the lens unit 10 to the light transmission plate 6 and the oxygen adsorption film 12 and irradiated to the photocurable resin 1 in the vicinity of the modeling region 11 to cure the part. . In step S13, the CPU 601 moves the modeling stage 3 via the stage control unit 607, for example, lowers the modeling stage 3 in the configuration of FIG.

  As mentioned earlier, there are so-called continuous modeling methods and intermittent modeling methods as modeling methods. For example, in the continuous modeling method, light irradiation (S10) and modeling stage movement (S13) are performed synchronously and in parallel. In the case of continuous modeling, a moving image projection unit or the like is used instead of the mirror unit 9, and the CPU 601 continuously radiates the curing light as a moving image. What is necessary is just to determine the speed which moves the modeling stage 3 continuously via the stage control part 607 according to the frame rate etc. of the hardening light of a moving image structure.

  On the other hand, in the intermittent modeling method, the CPU 601 alternately executes light irradiation (S10) and modeling stage movement (S13). In the light irradiation (S10), the CPU 601 controls the mirror unit 9 to scan the vicinity of the modeling region 11 with the curing light so as to cover the shape corresponding to one layer of the modeling object 2. At this time, the modeling stage 3 is stopped, and when the light irradiation for one layer (S10) is completed, the modeling stage 3 is moved by an amount substantially corresponding to the thickness of one layer via the stage control unit 607, for example, FIG. In the configuration of 1, it is lowered.

  In the control example of FIG. 7, the gas supply device 14 and the winding device 15 are activated before performing the light irradiation (S10) and the modeling stage movement (S13) in both the continuous modeling method and the intermittent modeling method. Then, the conveyance of the oxygen adsorption film 12 is started (S4). As a result, a new portion of the oxygen adsorption film 12 which always holds a gas having a polymerization (solidification) inhibition property, for example, oxygen or ozone, is sent in small amounts between the light transmission plate 6 and the modeling region 11.

  In step S14, it is determined whether or not the modeling of the model 2 has been completed, for example, whether or not the light irradiation (S10) and the modeling stage movement (S13) have been performed using all the model data that forms the model 2. The light irradiation (S10) and the modeling stage movement (S13) are repeatedly executed until all the modeling data forming the model 2 is processed.

  When the modeling of the modeled object 2 is completed, the process proceeds to step S15, the gas supply device 14 and the winding device 15 are stopped, and the conveyance of the oxygen adsorption film 12 is terminated.

  As described above, according to the present embodiment, the solidification reaction of the photocurable resin 1 in the portion facing the modeling region 11, particularly the oxygen adsorption film 12, is inhibited and can be controlled so as not to be cured. For this reason, in particular, it is possible to reliably suppress the sticking of the molded article 2 and the unnecessary increase in the viscosity of the photocurable resin 1 near the interface between the modeling region 11 and the light transmission plate 6 or the oxygen adsorption film 12. it can.

  Therefore, in the present embodiment, in the case of intermittent modeling, an operation of peeling the modeled object 2 from the film for each photocuring of one layer becomes unnecessary, and the modeling stage 3 can be moved at high speed. Further, in the case of continuous modeling, the lifting device 4 can continuously move the modeling stage 3 without receiving unnecessary resistance.

  In addition, by continuing to convey the oxygen adsorption film 12 in contact with the photocurable resin 1 at a constant speed, a flow is generated in the vicinity of the modeling region 11, particularly in the vicinity of the low pressure portion generated by the movement of the modeling stage 3. The part can be stirred. Thereby, the inflow to the modeling area | region 11 vicinity of the photocurable resin 1 used as the material for the modeling layer solidified next can be accelerated | stimulated. Thereby, the inflow speed to the modeling area | region 11 vicinity of the photocurable resin 1 used as the material for the modeling layer to solidify can be improved, and the curing light for the next layer can be irradiated rapidly, The speed of three-dimensional modeling can be increased.

<Embodiment 2>
FIG. 3 shows the structure of the three-dimensional modeling apparatus according to the second embodiment in a format according to FIG. Also in the three-dimensional modeling apparatus of FIG. 3, the control system structure and modeling control procedure can be substantially the same as those shown in FIGS. 6 and 7 of the first embodiment. Moreover, in this embodiment, the same reference number is attached | subjected to the same thru | or equivalent member as Embodiment 1, and the overlapping description shall be abbreviate | omitted about them.

  Also in the present embodiment, the oxygen adsorption film 12 corresponds to a supply member that supplies a gas having a curing inhibition property to the photocurable resin. Also in the present embodiment, the oxygen adsorbing film 12 is unwound from the form of the film roll 13 by the driving force of the winding device 15, and in the state of being in contact with the light transmission plate 6 by the guide rollers 12a, 12a. Be transported.

  3 is different from FIG. 1 in that a resin adhering device 20 and a cleaning device 21 are arranged in FIG. The resin adhering device 20 is disposed at a position upstream of the oxygen adsorbing film 12 being carried into the lower surface of the light transmission plate 6. The cleaning device 21 is disposed at a downstream position after the oxygen adsorbing film 12 is unloaded from the lower surface of the light transmission plate 6. The resin adhering device 20 and the cleaning device 21 can be configured as, for example, bowl-shaped containers each having a longitudinal direction in the drawing. As shown in the figure, the oxygen adsorbing film 12 is guided by the guide rollers 12a, 12a... From the resin adhering device 20 to the lower surface of the light transmitting plate 6 and then carried out through the cleaning device 21.

  The resin adhering device 20 accommodates the same liquid resin as the photocurable resin 1 in the inside thereof, and adheres it to both surfaces of the oxygen adsorbing film 12 that passes through the resin material by the resin supply rollers 20a arranged to face each other.

  On the other hand, the cleaning device 21 includes a guide roller 21b and a cleaning blade 21a disposed to face each other. The cleaning blade 21 a scrapes off the photocurable resin adhering to both surfaces of the oxygen adsorption film 12 carried out from the lower surface of the light transmission plate 6 and collects it in the cleaning device 21.

  The configuration of the three-dimensional modeling apparatus other than the above and the modeling operation or modeling control are the same as those in the first embodiment. Since the basic part of the modeling operation, the modeling control, and the operation and effect thereof is the same as that of the first embodiment described above, duplication is omitted here. In particular, according to the second embodiment, the resin adhering device 20 and the cleaning device are positioned immediately before the oxygen adsorbing film 12 is carried into the lower surface of the light transmission plate 6 and immediately after it is carried out from the lower surface of the light transmission plate 6. 21 is arranged. Thus, in this embodiment, before the oxygen adsorption film 12 is carried into the lower surface of the light transmission plate 6 or before the oxygen adsorption film 12 is carried into the photocurable resin 1, The photocurable resin 1 is adhered to both sides. Thereby, the familiarity between the oxygen adsorption film 12 passing through the lower surface of the light transmission plate 6 and the photocurable resin 1 in the container 5 is improved, and the oxygen adsorption film 12 can be smoothly moved at an intended conveyance speed. it can. In addition, the oxygen adsorbing film 12 can be carried into the lower surface of the light transmission plate 6 after supplying a solidification-inhibiting gas such as oxygen or ozone to the photocurable resin previously attached to the surface of the oxygen adsorbing film 12. For this reason, the solidification-inhibiting gas can be reliably sent to the vicinity of the modeling region 11 where it is desired to reliably suppress the solidification and the increase in viscosity, particularly to the vicinity of the light transmission plate 6. Furthermore, since the photocurable resin 1 attached to the oxygen adsorbing film 12 can be removed by the cleaning device 21 at a position immediately after being transported from the lower surface of the light transmission plate 6, it is photocurable at an unnecessary position in the three-dimensional modeling apparatus. It is possible to prevent the resin 1 from scattering.

<Embodiment 3>
In the configuration of Embodiments 1 and 2 shown in FIG. 1 or FIG. 3, the basic configuration is shown in which curing light is irradiated from above the container 5 and the modeling stage 3 is lowered as the modeling progresses. However, the irradiation direction of the curing light and the moving direction of the modeling stage 3 can be different from the configurations of the first and second embodiments as shown in FIG. 5 of the present embodiment.

  FIG. 5 shows the configuration of the three-dimensional modeling apparatus according to the third embodiment in the same format as in FIGS. In the configuration of FIG. 5, the container 5 containing the photocurable resin 1 has, for example, an open shape at the top, and a light transmission plate 6 that transmits the curing light is disposed on the bottom surface of the container 5. In the present embodiment, the light source 8, the mirror unit 9, and the lens unit 10 are disposed below the light transmission plate 6 and irradiate the modeling region 11 with the curing light from below through the light transmission plate 6.

  The model 2 is formed on the bottom surface of the modeling stage 3 in the modeling region 11. Accordingly, in the present embodiment, the modeling stage 3 is moved upward by the lifting device 4 as the modeling progresses. The substantial difference between the configuration of FIGS. 1 and 3 and the configuration of FIG. 5 of the present embodiment is the direction in which modeling of the model 2 proceeds, that is, the irradiation direction of the curing light, and the movement direction of the modeling stage 3 associated therewith. Only.

  Also in the present embodiment, the oxygen adsorption film 12 corresponds to a supply member that supplies a gas having a curing inhibition property to the photocurable resin. Also in the present embodiment, the oxygen adsorbing film 12 is unwound from the form of the film roll 13 by the driving force of the winding device 15, and in the state of being in contact with the light transmission plate 6 by the guide rollers 12a, 12a. Be transported.

  In FIG. 5, the cross section of the light transmission plate 6 is shown as a simple rectangle, but the surface in contact with the oxygen adsorption film 12 is convex toward the film or the modeling region 11 as in the example of FIG. 2. It may be configured as a curved surface shape. Thereby, the same effect as what was demonstrated in relation to FIG. 2 can be anticipated.

  Further, in the configuration of FIG. 5, the resin adhering device 20 and the cleaning device 21 are arranged as in the example of FIG. 3. The operations and effects of the resin adhesion device 20 and the cleaning device 21 are the same as those described with reference to FIG. Further, as apparent from the comparison between FIG. 1 and FIG. 3, in the configuration of FIG. 5, the resin adhering device 20 and the cleaning device 21 are not necessarily essential, and a configuration in which these are omitted is also conceivable. In FIG. 5, the supply device 7 that supplies the photocurable resin 1 into the container 5 is not shown, but the same supply device 7 as in the case of FIGS. 1 to 3 may be arranged.

  Even if it is a structure like FIG. 5, as above-mentioned, it can control that the solidification reaction of the photocurable resin 1 of the site | part which faces the modeling area | region 11, especially the oxygen adsorption film 12, is inhibited, and it does not harden | cure. For this reason, in particular, in the vicinity of the interface between the modeling region 11 and the light transmission plate 6 or the oxygen adsorption film 12, it is possible to reliably suppress the fixation of the modeling object 2 and the unnecessary increase in the viscosity of the photocurable resin 1. Can do.

  Therefore, in the present embodiment, in the case of intermittent modeling, an operation of peeling the modeled object 2 from the film for each layer of photocuring is unnecessary, and the modeling stage 3 can be moved at high speed. Further, in the case of continuous modeling, the lifting device 4 can continuously move the modeling stage 3 without receiving unnecessary resistance.

  Further, by continuing to convey the oxygen adsorption film 12 in contact with the photocurable resin 1 at a constant speed, it is possible to agitate the vicinity of the modeling region 11, particularly the vicinity of the low-pressure portion generated by the movement of the modeling stage 3. . Thereby, the inflow to the modeling area | region 11 vicinity of the photocurable resin 1 used as the material for the modeling layer solidified next can be accelerated | stimulated. Thereby, the inflow speed to the modeling area | region 11 vicinity of the photocurable resin 1 used as the material for the modeling layer to solidify can be improved, and the curing light for the next layer can be irradiated rapidly, The speed of three-dimensional modeling can be increased.

  The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program. It can also be realized by processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

  DESCRIPTION OF SYMBOLS 1 ... Photocurable resin, 2 ... Modeling object, 3 ... Modeling stage, 4 ... Elevating device, 5 ... Container, 6 ... Light transmission board, 7 ... Supply apparatus, 8 ... Light source, 9 ... Mirror unit, 10 ... Lens unit , 11 ... modeling area, 12 ... oxygen adsorption film, 13 ... film roll, 14 ... gas supply device, 15 ... winding device, 20 ... resin adhesion device, 21 ... cleaning device, 22 ... oxygen adsorption layer, 23 ... gas permeation Layer, 24 ... hard layer, 601 ... CPU, 602 ... ROM, 603 ... RAM, 604 ... interface, 605 ... light irradiation control unit, 606 ... film control unit, 607 ... stage control unit, 609 ... network interface, 610 ... host apparatus.

Claims (14)

A container containing a photocurable resin;
A base that supports a pre-formed site obtained by photocuring the photocurable resin;
A moving device for moving the base;
A light irradiation device for irradiating light for photocuring the photocurable resin;
A light transmissive member provided between the light irradiation device and the base;
A supply member that faces the photocurable resin and supplies a gas having a curing inhibition property to the photocurable resin;
A transport device for moving the supply member between the light transmissive member and the photocurable resin;
3D modeling device.   The three-dimensional modeling apparatus according to claim 1, wherein the gas includes oxygen, and the supply member is a film that adsorbs the gas.   3. The three-dimensional modeling apparatus according to claim 2, wherein oxygen or ozone is preliminarily adsorbed on the film at a position before the film is carried between the light transmitting member and the photocurable resin by the transport device. A three-dimensional modeling apparatus provided with a suction device.   4. The three-dimensional modeling apparatus according to claim 2, wherein the film includes an oxygen adsorption layer, a hard layer positioned on the light transmission member side of the oxygen adsorption layer, and the photocurable property of the oxygen adsorption layer. A three-dimensional modeling apparatus comprising: a gas permeable layer located on a resin side.   The three-dimensional modeling apparatus according to claim 4, wherein the oxygen adsorption layer is a perfluoro compound, iron powder, activated carbon, or a resin filled with these, and the gas permeable layer is a polyvinylidene chloride-coated biaxially stretched polypropylene, Or the three-dimensional modeling apparatus which is a polyvinylidene chloride coat polyester.   The three-dimensional modeling apparatus according to claim 4 or 5, wherein the thickness of the gas permeable layer is 0.005 mm to 0.1 mm, the thickness of the oxygen adsorption layer is 0.01 mm to 0.3 mm, and the thickness of the hard layer. Is a three-dimensional modeling apparatus having a thickness of 0.005 mm to 0.3 mm.   The three-dimensional modeling apparatus according to any one of claims 1 to 6, wherein the supply member is provided at a position before the supply member is carried between the light transmitting member and the photocurable resin by the transport device. A three-dimensional modeling apparatus provided with a resin adhesion apparatus for adhering the photocurable resin to a member.   The three-dimensional modeling apparatus according to any one of claims 1 to 7, wherein the supply member is provided at a position after the supply device is carried out from between the light transmission member and the photocurable resin by the transport device. A three-dimensional modeling apparatus provided with a cleaning device for removing resin on the surface of a member.   9. The three-dimensional modeling apparatus according to claim 1, wherein a surface of the light transmitting member that is in contact with the supply member has a curved shape that is convex toward the supply member.   10. The three-dimensional modeling apparatus according to claim 1, wherein the transport device generates a driving force that unwinds the roll-shaped supply member, the light transmission member, and the light. A three-dimensional modeling apparatus comprising: a guide roller that guides the supply member unwound between curable resins.   11. The three-dimensional modeling apparatus according to claim 1, wherein, in parallel with light irradiation by the light irradiation device, the supply device supplies the light transmission member and the photocurable resin between the light transmission member and the photocurable resin. A three-dimensional modeling apparatus that continuously performs modeling by moving the base by the moving device while conveying a member. A container that contains a photocurable resin, a base that supports a shaped part obtained by photocuring the photocurable resin, a moving device that moves the base, and the photocurable resin is photocured. A light irradiating device for irradiating light, a light transmitting member provided between the light irradiating device and the base, and facing the light curable resin, and curing inhibition with respect to the light curable resin A supply member that supplies a gas having gas, a transport device that moves the supply member between the light transmitting member and the photocurable resin, and a control that controls the light irradiation device, the moving device, and the transport device In a method for manufacturing a three-dimensional structure, a three-dimensional structure is manufactured by a three-dimensional structure forming apparatus comprising:
A light irradiation step in which the control unit cures the photocurable resin by light irradiation of the light irradiation device;
The control unit moves the base by the moving device; and
A transport step in which the control unit transports the supply member between the light transmitting member and the photocurable resin by the transport device;
The control unit executes the moving step and the transport step in parallel with the light irradiation step, and continuously manufactures a three-dimensional structure.   The control program for making the said control part perform each process of the manufacturing method of the three-dimensional structure according to claim 12.   A computer-readable recording medium storing the control program according to claim 13.

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