JPH0224120A - Optical shaping method - Google Patents
Optical shaping methodInfo
- Publication number
- JPH0224120A JPH0224120A JP63172682A JP17268288A JPH0224120A JP H0224120 A JPH0224120 A JP H0224120A JP 63172682 A JP63172682 A JP 63172682A JP 17268288 A JP17268288 A JP 17268288A JP H0224120 A JPH0224120 A JP H0224120A
- Authority
- JP
- Japan
- Prior art keywords
- light
- base
- window
- transmission window
- light transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003287 optical effect Effects 0.000 title claims description 14
- 238000007493 shaping process Methods 0.000 title abstract 2
- 229920005989 resin Polymers 0.000 abstract description 21
- 239000011347 resin Substances 0.000 abstract description 21
- 230000001678 irradiating effect Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 8
- 238000000926 separation method Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002601 oligoester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0888—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using transparant moulds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は光硬化性樹脂に光を照射して目的形状の硬化体
を製造する光学的造形法に関する。詳しくは、容器に設
けた透光窓から容器内の光硬化性樹脂に向って光を照射
する光学的造形法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an optical modeling method for producing a cured product having a desired shape by irradiating a photocurable resin with light. Specifically, the present invention relates to an optical modeling method in which light is irradiated from a light-transmitting window provided in a container toward a photocurable resin inside the container.
［従来の技術］
光硬化性樹脂に光束を照射して、該照射部分を硬化させ
、この硬化部分を水平方向に連続させると共に、さらに
その上側に光硬化性樹脂を供給して同様にして硬化させ
ることにより上下方向にも硬化体を連続させ、これを繰
り返すことにより目的形状の硬化体を製造する光学的造
形法は特開昭６０−２４７５１５号、６２−３５９６６
号、６２−１０１４０８号などにより公知である。光束
を走査する代りにマスクを用いる方法も公知である。[Prior art] A photocurable resin is irradiated with a light beam to cure the irradiated portion, and this cured portion is continued in the horizontal direction, and a photocurable resin is further supplied above it and cured in the same manner. An optical modeling method in which the cured body is made to continue in the vertical direction by repeating this process to produce a cured body in the desired shape is disclosed in Japanese Patent Application Laid-open Nos. 60-247515 and 62-35966.
No. 62-101408. It is also known to use a mask instead of scanning the beam.
かかる光学的造形法として、底面又は側面に透光窓を有
する容器と、この透光窓を通して容器内に光を照射する
装置と、該容器内において透光窓から離反する方向へ８
動可能に設けられたベースを有するものがある。この光
学的造形法について第２図を参照して説明する。Such an optical modeling method includes a container having a light-transmitting window on the bottom or side surface, a device that irradiates light into the container through the light-transmitting window, and a device that irradiates light into the container through the light-transmitting window, and a device that emits light into the container in a direction away from the light-transmitting window.
Some have a movably mounted base. This optical modeling method will be explained with reference to FIG. 2.
第２図において、容器１１内には光硬化性樹脂１２が収
容されている。容器１１の底面には、石英ガラス等の透
光板よりなる透光窓１３が設けられており、該透光窓１
３に向けて光束１４を照射するように、レンズを内蔵し
た光出射部１５、光ファイバー１６、光出射部１５を水
平面内のＸ−Ｙ方向（Ｘ、Ｙは直交する２方向）に移動
させるｘ−Ｙ８ｉ！ｊｌ装置１７、光源２０等よりなる
光学系（照射装置）が設けられている。In FIG. 2, a photocurable resin 12 is housed in a container 11. As shown in FIG. A transparent window 13 made of a transparent plate such as quartz glass is provided on the bottom of the container 11.
moving the light emitting unit 15 with a built-in lens, the optical fiber 16, and the light emitting unit 15 in the X-Y direction (X and Y are two orthogonal directions) in a horizontal plane so as to irradiate the light beam 14 toward -Y8i! An optical system (irradiation device) including a jl device 17, a light source 20, etc. is provided.
容器１１内にはベース２１が設置され、該ベース２１は
エレベータ２２により昇降可能とされている。これら移
動装置１７、エレベータ２２はコンピュータ２３により
制御される。A base 21 is installed inside the container 11, and the base 21 can be raised and lowered by an elevator 22. These moving device 17 and elevator 22 are controlled by a computer 23.
上記装置により硬化体を製造する場合、まずベース２１
を透光窓１３よりもわずか上方に位置させ、光束１４を
目的形状物の水平断面に倣って走査させる。この走査は
コンピュータ制御されたｘ−ｙ８動装置により行なわれ
る。When producing a cured body using the above device, first the base 21
is positioned slightly above the transparent window 13, and the light beam 14 is scanned along the horizontal cross section of the target object. This scanning is performed by a computer controlled x-y eight motion system.
目的形状物の一つの水平断面（この場合は底面又は上面
に相当する部分）のすべてに光を照射した後、ベース２
１をわずかに上昇させ、硬化物２４と透光窓２１との間
に未硬化の光硬化性樹脂を流入させた後、上記と同様の
光照射を行なう。After irradiating the entire horizontal cross section of the target shape (in this case, the part corresponding to the bottom or top surface), the base 2
1 is slightly raised to flow the uncured photocurable resin between the cured material 24 and the light-transmitting window 21, and then the same light irradiation as above is performed.
この手順を繰り返すことにより、目的形状の硬化体が多
層積層体として得られる。By repeating this procedure, a cured product having the desired shape can be obtained as a multilayer laminate.
［発明が解決しようとする課題］
上記の光学的造形法においては、容器１１内に光硬化性
樹脂１２を注ぎ込んだりした際にベース２１の表面や透
光窓１３の容器内側面に気泡が付着してしまい、照射さ
れた光を散乱させたり、光がベース２１と透光窓１３と
の間に流入することを妨げたりする等の支障が生じてい
た。また、ベース面上に付着した気泡が硬化物に取り込
まれ、目的形状体に空孔部を生じさせるおそれもあった
。[Problems to be Solved by the Invention] In the optical modeling method described above, when the photocurable resin 12 is poured into the container 11, air bubbles adhere to the surface of the base 21 and the inner surface of the container of the transparent window 13. This causes problems such as scattering the irradiated light and preventing light from flowing between the base 21 and the light-transmitting window 13. In addition, there was also a risk that air bubbles adhering to the base surface would be incorporated into the cured product, creating voids in the target shaped body.
［課題を解決するための手段］
本発明は、容器の透光窓から光を照射すると共にベース
を徐々に透光窓から離反させ、目的形状体の断面に相当
する光硬化性樹脂の硬化層を多数積層することにより目
的形状体を造形するようにした光学的造形法において、
造形工程に先立ってベースを透光窓に密着又は近接させ
、該ベースと透光窓との間から気泡を追い出すようにし
たものである。[Means for Solving the Problems] The present invention irradiates light from a light-transmitting window of a container, gradually moves the base away from the light-transmitting window, and forms a cured layer of a photocurable resin corresponding to a cross section of a target shaped object. In an optical modeling method that creates a target shape by laminating a large number of
Prior to the modeling process, the base is brought into close contact with or close to the light-transmitting window, and air bubbles are expelled from between the base and the light-transmitting window.
［作用］
かかる本発明方法にあっては、ベース表面及び透光窓の
容器内側面から気泡が確実に除去されるので、照射され
た光が散乱されることなく光硬化性樹脂に照射される。[Operation] In the method of the present invention, air bubbles are reliably removed from the base surface and the inner surface of the container of the light-transmitting window, so that the irradiated light is irradiated onto the photocurable resin without being scattered. .
また、光硬化性樹脂がベースと透光窓との間に円滑に流
入する。さらに、光硬化性樹脂の硬化物中には気泡が取
り込まれない。Furthermore, the photocurable resin smoothly flows between the base and the light-transmitting window. Furthermore, air bubbles are not incorporated into the cured product of the photocurable resin.
［実施例］ 以下、図面を用いて実施例について説明する。[Example] Examples will be described below with reference to the drawings.
第１図は実施例方法において、造形に先立ってベース２
１を透光窓１３に密着させた状態を示している。なお、
第１図のその他の構成は前述した第２図と同じであり、
同一部材に同一符号を付しである。Figure 1 shows the base 2
1 is shown in close contact with a transparent window 13. In addition,
The other configurations in FIG. 1 are the same as those in FIG. 2 described above,
The same members are given the same reference numerals.
このようにベース２１を透光窓１３に密着させることに
より、ベース２１の下面や透光窓１３の上面に付着して
いた気泡は完全にベース２１と透光窓１３との間から追
い出される如くして除去される。なお、このようにベー
ス２１を透光窓１３に密着させてから離反させるように
すると、第１層目の硬化層を形成するための初期間隙（
ベース２１と透光窓１３との間隔）を正確に予定値に設
定できる。従って、第１層目の硬化層の厚さの精度が高
い。By bringing the base 21 into close contact with the transparent window 13 in this way, air bubbles that have adhered to the lower surface of the base 21 and the upper surface of the transparent window 13 can be completely expelled from between the base 21 and the transparent window 13. removed. Note that by bringing the base 21 into close contact with the transparent window 13 and then separating it in this way, the initial gap for forming the first hardened layer (
The distance between the base 21 and the transparent window 13 can be accurately set to the expected value. Therefore, the accuracy of the thickness of the first hardened layer is high.
上記のように気泡が除去された後、ベース２１を所定距
離だけ（例えば０．１〜１ｍｍ程度）だけ透光窓１３か
ら離反させ、次いで光を照射することによりまず第１Ｎ
目の硬化層２４を形成する。次いで、ベース２１を所定
距離だけさらに透光窓１３から離反させた後、光を照射
し、第２層目の硬化層２４を形成する。なお、光硬化性
樹脂２４の硬化物はベース２１と透光窓１３との間に生
成し、これらベース２１及び透光窓１３の双方の表面に
硬化物が付着するが、硬化物がベース２１の表面により
強力に付着するようにベース２１及び透光窓１３の表面
構成がなされている。After the air bubbles are removed as described above, the base 21 is moved away from the transparent window 13 by a predetermined distance (for example, about 0.1 to 1 mm), and then the first N
A hardened layer 24 is formed. Next, after the base 21 is further separated from the transparent window 13 by a predetermined distance, light is irradiated to form a second hardened layer 24. Note that the cured product of the photocurable resin 24 is generated between the base 21 and the light-transmitting window 13, and the cured product adheres to the surfaces of both the base 21 and the light-transmitting window 13. The surfaces of the base 21 and the light-transmitting window 13 are structured so that they adhere more strongly to the surface of the base 21 and the light-transmitting window 13.
従って、第１層目、第２層目又はそれに引き続く硬化層
を形成した後ベース２１を移動させるときは、硬化物２
４と透光窓１３の表面との間が剥離し、硬化物２４と透
光窓１３との間が前記所定距離だけ離反する。Therefore, when moving the base 21 after forming the first layer, the second layer, or the subsequent cured layer, the cured product 2
4 and the surface of the light-transmitting window 13 are separated, and the cured material 24 and the light-transmitting window 13 are separated by the predetermined distance.
目的形状体のすべての層を形成した後、硬化物２４をベ
ース２１から取り外し、必要に応じ仕上げ処理を施して
目的形状体を得ることができる。After forming all the layers of the object with the desired shape, the cured product 24 is removed from the base 21 and finishing treatment can be performed as necessary to obtain the object with the desired shape.
上記実施例ではベース２１を透光窓１３に密着させてい
るが、本発明にあっては、ベース２１と透光窓１３との
間から気泡を追い出し得る程度にベース２１を透光窓１
３に近接させるようにしても良い。In the embodiment described above, the base 21 is brought into close contact with the light-transmitting window 13, but in the present invention, the base 21 is brought into close contact with the light-transmitting window 13 to the extent that air bubbles can be expelled from between the base 21 and the light-transmitting window 13.
It may be arranged to be close to 3.
上記実施例は、透光窓１３を容器の底面に設は光を容器
の下方から照射するようにしているが、本発明において
は容器１１の側面に透光窓を設け、該容器１１の側面か
ら光を照射するようにしても良い。この場合、ベースを
成形過程において徐々に側方に移動させれば良い。In the above embodiment, the light-transmitting window 13 is provided on the bottom surface of the container so that light is irradiated from below the container, but in the present invention, the light-transmitting window 13 is provided on the side surface of the container 11. Light may also be irradiated from. In this case, the base may be gradually moved laterally during the molding process.
上記実施例では、ｘ −ｙ ｙ）動装置１７により光束
１４を走査しているが、光源からの光をミラー（図示略
）で反射させた後、レンズで収束させて光硬化性樹脂に
照射する光学系を採用しても良い、この場合はミラーを
回転させることにより光束を走査できる。In the above embodiment, the light beam 14 is scanned by the x-y-y moving device 17, but the light from the light source is reflected by a mirror (not shown), converged by a lens, and irradiated onto the photocurable resin. In this case, the light beam can be scanned by rotating the mirror.
上記実施例では光束１４を走査することにより硬化物２
４を創成しているが、本発明はこれを公知のマスク法に
適用し、例えば第３図の如く目的形状物の断面に相当す
るスリット２５を有したマスク２６を用いても良い、符
号２７は平行光束を示す、第３図のその他の符号は第１
．２図と同一部材を示している。In the above embodiment, by scanning the light beam 14, the cured product 2 is
4, but the present invention applies this to a known mask method, and for example, as shown in FIG. 3, a mask 26 having a slit 25 corresponding to the cross section of the target shape may be used. indicates a parallel light beam; other symbols in Fig. 3 indicate the first
．． The same members as in Figure 2 are shown.
本発明において、前記光硬化性樹脂としては、光照射に
より硬化する種々の樹脂を用いることができ、例えば変
性ポリウレタンメタクリレート、オリゴエステルアクリ
レート、ウレタンアクリレート、エポキシアクリレート
、感光性ポリイミド、アミノアルキドを挙げることがで
キル。In the present invention, various resins that are cured by light irradiation can be used as the photocurable resin, such as modified polyurethane methacrylate, oligoester acrylate, urethane acrylate, epoxy acrylate, photosensitive polyimide, and amino alkyd. Gade kill.
前記光としては、使用する光硬化性樹脂に応じ、可視光
、紫外光等種々の光を用いることができる。該光は通常
の光としても良いが、レーザ光とすることにより、エネ
ルギーレベルを高めて造形時間を短縮し、良好な集光性
を利用して造形精度を向上させ得るという利点を得るこ
とができる。As the light, various types of light such as visible light and ultraviolet light can be used depending on the photocurable resin used. Although the light may be ordinary light, using laser light has the advantages of increasing the energy level, shortening the modeling time, and improving the modeling accuracy by utilizing good light focusing. can.
［効果］
以上の通り、本発明の光学的造形法によれば、ベース表
面及び透光窓面から気泡が除去されるので、光を散乱さ
せることなく予定されていた箇所に所要強度の光を照射
できる。また、光硬化性樹脂がベースと透光窓との間あ
るいは硬化物と透光窓との間に円滑に流入するようにな
る。これらのことから、本発明方法によると寸法精度の
高い造形体を予定通りの製造時間で造形できる。また、
硬化物中に気泡が取り込まれることも確実に防止される
。[Effect] As described above, according to the optical modeling method of the present invention, air bubbles are removed from the base surface and the light-transmitting window surface, so light of the required intensity can be directed to the planned location without scattering the light. Can be irradiated. Furthermore, the photocurable resin can smoothly flow between the base and the light-transmitting window or between the cured product and the light-transmitting window. For these reasons, according to the method of the present invention, a molded object with high dimensional accuracy can be manufactured within a scheduled manufacturing time. Also,
Air bubbles are also reliably prevented from being incorporated into the cured product.
さらに、本発明方法によれば、第１７！１目の硬化層を
形成するためのベースと透光窓との初期間隙を精度良く
形成することができるので、第１層目の硬化層の厚さ精
度が極めて高い。Furthermore, according to the method of the present invention, the initial gap between the base and the light-transmitting window for forming the 17th!1st hardened layer can be formed with high precision, so that the thickness of the first hardened layer can be The accuracy is extremely high.
第１図、第２図及び第３図は本発明の実施例に係る方法
を実施するための装置構成図である。
１２・・・光硬化性樹脂、１３・・・透光窓、１６・・
・光ファイバー ２０・・・光源、２１・・・ベース、
２２・・・エレベータ。FIG. 1, FIG. 2, and FIG. 3 are configuration diagrams of an apparatus for carrying out a method according to an embodiment of the present invention. 12... Photocurable resin, 13... Transparent window, 16...
・Optical fiber 20... light source, 21... base,
22...Elevator.
Claims (1)
側面に対して接離方向に移動可能なベース及び該透光窓
を通して容器内へ光を照射する光照射装置を備えた光学
的造形装置を用い、該透光窓を通して光を照射すると共
に前記ベースを徐々に窓から離反方向へ移動させ、目的
形状体の一断面に相当する硬化層を前記ベース上に積み
重ねることにより目的形状体を造形する光学的造形法に
おいて、 まず前記ベースを透光窓に密着又は近接させることによ
りベース面と透光窓との間の気泡を除去した後、該ベー
スを透光窓から離反させ、その後前記光照射及びベース
移動を行なわせて造形するようにしたことを特徴とする
光学的造形法。[Scope of Claims] A container having a light-transmitting window on the side or bottom surface, a base movable toward and away from the inner surface of the container of the light-transmitting window, and a light that irradiates light into the container through the light-transmitting window. Using an optical modeling device equipped with an irradiation device, light is irradiated through the transparent window and the base is gradually moved in a direction away from the window, so that a hardened layer corresponding to one cross section of the target shape is placed on the base. In an optical modeling method in which a target shape is formed by stacking the base on a transparent window, air bubbles between the base surface and the transparent window are removed by first bringing the base into close contact with or close to the transparent window, and then the base is placed in a transparent manner. 1. An optical modeling method characterized in that modeling is performed by moving the object away from the optical window and then performing the light irradiation and base movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63172682A JPH0224120A (en) | 1988-07-13 | 1988-07-13 | Optical shaping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63172682A JPH0224120A (en) | 1988-07-13 | 1988-07-13 | Optical shaping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0224120A true JPH0224120A (en) | 1990-01-26 |
| JPH0533899B2 JPH0533899B2 (en) | 1993-05-20 |
Family
ID=15946410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63172682A Granted JPH0224120A (en) | 1988-07-13 | 1988-07-13 | Optical shaping method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224120A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5089184A (en) * | 1989-01-18 | 1992-02-18 | Mitsui Engineering And Shipbuilding Co., Ltd. | Optical molding method |
| JP4663813B2 (en) * | 2008-02-20 | 2011-04-06 | 裕 道脇 | Both screw body and female screw body |
| JP2019519407A (en) * | 2016-06-27 | 2019-07-11 | フォームラブス, インコーポレーテッドFormlabs, Inc. | Position detection technique for additive manufacturing and related systems and methods |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56144478A (en) * | 1980-04-12 | 1981-11-10 | Hideo Kodama | Stereoscopic figure drawing device |
-
1988
- 1988-07-13 JP JP63172682A patent/JPH0224120A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56144478A (en) * | 1980-04-12 | 1981-11-10 | Hideo Kodama | Stereoscopic figure drawing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5089184A (en) * | 1989-01-18 | 1992-02-18 | Mitsui Engineering And Shipbuilding Co., Ltd. | Optical molding method |
| JP4663813B2 (en) * | 2008-02-20 | 2011-04-06 | 裕 道脇 | Both screw body and female screw body |
| JP2019519407A (en) * | 2016-06-27 | 2019-07-11 | フォームラブス, インコーポレーテッドFormlabs, Inc. | Position detection technique for additive manufacturing and related systems and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0533899B2 (en) | 1993-05-20 |
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