JP2948893B2 - Photocurable resin three-dimensional molding device - Google Patents
Photocurable resin three-dimensional molding deviceInfo
- Publication number
- JP2948893B2 JP2948893B2 JP2260700A JP26070090A JP2948893B2 JP 2948893 B2 JP2948893 B2 JP 2948893B2 JP 2260700 A JP2260700 A JP 2260700A JP 26070090 A JP26070090 A JP 26070090A JP 2948893 B2 JP2948893 B2 JP 2948893B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- resin liquid
- molding
- modeling
- bottom plate
- 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.)
- Expired - Lifetime
Links
- 239000011347 resin Substances 0.000 title claims description 108
- 229920005989 resin Polymers 0.000 title claims description 108
- 238000000465 moulding Methods 0.000 title claims description 35
- 239000007788 liquid Substances 0.000 claims description 93
- 238000001816 cooling Methods 0.000 claims description 26
- 238000013459 approach Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 239000000110 cooling liquid Substances 0.000 claims 1
- 230000003028 elevating effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007493 shaping process 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
- B29C64/129—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 characterised by the energy source therefor, e.g. by global irradiation combined with a mask
- B29C64/135—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 characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光硬化樹脂の未硬化樹脂液から立体物を積
層造形する光硬化樹脂立体造形装置に関し、特にその造
形槽の底板部を介して槽内の樹脂液を露光する光硬化樹
脂立体造形装置に関する。Description: TECHNICAL FIELD The present invention relates to a photocurable resin three-dimensional molding apparatus for laminating and molding a three-dimensional object from an uncured resin liquid of a photocurable resin, and in particular, through a bottom plate portion of the molding tank. The present invention relates to a three-dimensional photocurable resin molding apparatus for exposing a resin liquid in a bath.
近時、製版技術の応用によって光硬化樹脂の立体物を
造形する立体造形装置が開発され、電子計算機を併用す
ることにより製品開発時の雛型や模型等の複雑な物体を
造形できる装置として注目されている。Recently, a three-dimensional molding device that forms a three-dimensional object of photocurable resin has been developed by applying plate making technology, and it has attracted attention as a device that can form complex objects such as templates and models at the time of product development by using an electronic computer together Have been.
この種の光硬化樹脂立体造形装置としては、例えば特
開昭62−35966号公報に記載されたものがあり、この装
置では、未硬化の光硬化樹脂液を収容した造形槽の所定
平面を作業面として、この作業面近傍の樹脂液に光を照
射し硬化させて造形物の一断面層を形成するとともに、
これを移動させながら隣接する断面層を順次接着しつつ
積層することにより３次元の物体を造形するようになっ
ている。この光硬化樹脂は例えば紫外線硬化型の樹脂で
あり、造形物の形状やその要求精度に応じて可動スポッ
トビームによる描画やマスキングによる選択的な露光法
等を採用できる。また、前記作業面としては樹脂液の液
面を用いることができるが、外部からの振動により作業
面が波打ったり表面張力の影響を受けたりするため、断
面層の厚みが不安定になってしまい、更に造形物に気泡
やゴミ等が混入する虞もある。そこで、造形槽の底板部
を光透過性の材質から形成するとともに、この底板部に
接近・離間する昇降式の造形棚を設け、前記作業面を造
形槽の底面側に設定して、底板部と造形棚の間の樹脂液
に造形槽の下方から光を照射するようにしたものが提案
されている。この場合、造形棚が造形槽の底面から離間
するよう一定量引き上げられると、樹脂液は造形棚又は
上方の断面層と底板部との間隙に入り込み（例えば毛細
管現象により入り込み）、薄い一定厚さの断面槽が形成
される。したがって、造形物の各断面層の厚みを均一に
することができ、安定した造形作業ができるとともに、
造形槽に収容する未硬化樹脂液の量も少なくて済む。An example of this type of three-dimensional photocurable resin molding apparatus is described in Japanese Patent Application Laid-Open No. 62-35966. In this apparatus, a predetermined plane of a molding tank containing an uncured photocurable resin liquid is worked. As a surface, while irradiating the resin liquid in the vicinity of this work surface with light and curing it to form one cross-sectional layer of the modeled object,
The three-dimensional object is formed by sequentially adhering and laminating adjacent cross-sectional layers while moving the object. The photocurable resin is, for example, an ultraviolet curable resin, and a selective exposure method using drawing or masking with a movable spot beam can be adopted according to the shape of the modeled object and the required accuracy. In addition, the working surface may be a liquid surface of a resin liquid, but the working surface may be wavy or affected by surface tension due to external vibration, so that the thickness of the sectional layer becomes unstable. In addition, there is a possibility that air bubbles, dust, and the like may be mixed into the molded article. Therefore, the bottom plate portion of the modeling tank is formed from a light-transmitting material, and an elevating modeling shelf is provided to approach or separate from the bottom plate portion, and the work surface is set on the bottom side of the modeling tank, There has been proposed a device in which the resin liquid between the mold and the molding shelf is irradiated with light from below the molding tank. In this case, when the modeling shelf is pulled up by a predetermined amount so as to be separated from the bottom surface of the modeling tank, the resin liquid enters the gap between the modeling shelf or the upper section layer and the bottom plate portion (for example, enters by a capillary phenomenon), and has a small thickness. Is formed. Therefore, it is possible to make the thickness of each cross-sectional layer of the molded article uniform, and to perform a stable molding operation,
The amount of the uncured resin liquid stored in the modeling tank can be small.
しかしながら、このような従来の光硬化樹脂立体造形
装置にあっては、所定量の未硬化樹脂液を造形槽に収容
し、その造形槽の底板部と造形棚の間の樹脂液に造形槽
の下方から光を照射する構成であったため、次のような
問題があった。However, in such a conventional three-dimensional photocurable resin molding apparatus, a predetermined amount of an uncured resin liquid is stored in a molding tank, and the resin liquid between the bottom plate of the molding tank and the molding shelf is added to the molding tank. Since the configuration is such that light is irradiated from below, there are the following problems.
（イ）造形作業が進んで硬化した断面層が液面上まで引
き上げられると、それに伴って液面高さが変化してしま
い、造形槽内の樹脂液量が少ないこともあって、造形棚
下への樹脂液の入り込み具合が変化していた。このた
め、特に各断面層が薄い場合に不完全な造形になってし
まうことがあった。(A) As the molding work progresses and the cured cross-section layer is pulled up above the liquid level, the liquid level changes accordingly, and the amount of resin liquid in the modeling tank is small. The degree of penetration of the resin liquid into the resin was changed. For this reason, especially when each cross-sectional layer is thin, incomplete modeling may be caused.
（ロ）造形槽の底板部が露光により加熱され続けて高温
になり、既に硬化した隣接断面層の光硬化樹脂に熱応力
が生じて造形物に変形が生じていた。(B) The bottom plate portion of the modeling tank was continuously heated by the exposure and became high in temperature, and a thermal stress was generated in the already cured photocurable resin of the adjacent cross-sectional layer, resulting in deformation of the molded article.
これに対し、例えば造形槽内に冷却コイル等の冷却手
段を設けることも考えられるが、部分的な冷却手段では
樹脂液の少ない造形槽内において均一で且つ安定した冷
却効果を発揮させることが構造上困難である。On the other hand, for example, it is conceivable to provide a cooling means such as a cooling coil in a modeling tank. However, it is necessary to provide a uniform and stable cooling effect in a modeling tank with little resin liquid by a partial cooling means. It is difficult.
そこで、本発明は、造形槽内の未硬化樹脂液の液面高
さを一定に保ちつつ、樹脂液自体により造形槽の底板部
を確実に冷却することのできる光硬化樹脂立体造形装置
を提供することを目的とするものである。Accordingly, the present invention provides a photocurable resin three-dimensional molding apparatus that can reliably cool the bottom plate of the molding tank by the resin liquid itself while maintaining the liquid level of the uncured resin liquid in the molding tank constant. It is intended to do so.
本発明は、上記目的達成のため、底板部から所定高さ
に位置する流出口を造形槽に形成するとともに、該流出
口を通して造形槽内の未硬化樹脂液をオーバーフローさ
せながら循環させる循環手段を設け、該循環手段の循環
経路に、造形槽に流入する樹脂液を冷却する冷却手段を
設けたことを特徴とするものであり、 好ましくは、循環手段が、循環経路中に所定容量の樹
脂液タンクと、該タンクからの未硬化樹脂液を造形槽に
送出するポンプとを有するもの、 更には、樹脂液タンクが、前記冷却手段の冷却器を構
成するものである。The present invention, in order to achieve the above object, while forming an outlet located at a predetermined height from the bottom plate portion in the modeling tank, circulating means for circulating the uncured resin liquid in the modeling tank through the outlet while overflowing. Wherein a cooling means for cooling the resin liquid flowing into the modeling tank is provided in a circulation path of the circulation means. Preferably, the circulation means has a predetermined volume of resin liquid in the circulation path. A pump having a tank and a pump for sending the uncured resin liquid from the tank to a modeling tank. Further, the resin liquid tank constitutes a cooler of the cooling means.
本発明では、底板部から所定高さに位置する流出口を
通して、循環手段が造形槽内の未硬化樹脂液をオーバー
フローさせながら循環させ、その循環経路に設けられた
冷却手段が造形槽に流入する樹脂液を冷却する。したが
って、造形物が液面上に引き上げられても液面高さが変
化することはなく、造形槽内の樹脂液量が少くとも造形
棚下への樹脂液の入り込み具合は一定になるとともに、
造形槽の底板部が露光により加熱され続けても、造形槽
に流入する冷却樹脂液によって底板部が常時確実に冷却
される。In the present invention, the circulating means circulates the uncured resin liquid in the modeling tank while overflowing through the outlet located at a predetermined height from the bottom plate portion, and the cooling means provided in the circulation path flows into the modeling tank. Cool the resin liquid. Therefore, the liquid level does not change even if the molded object is pulled up on the liquid surface, and the degree of the resin liquid entering under the modeling shelf becomes constant even if the amount of the resin liquid in the modeling tank is small,
Even if the bottom plate portion of the modeling tank continues to be heated by exposure, the bottom plate portion is always reliably cooled by the cooling resin liquid flowing into the modeling tank.
また、循環経路中に設けた所定容量の樹脂液タンクと
ポンプとによって樹脂液を循環させると、造形物の引き
上げに伴って減少する樹脂液を樹脂液タンクから補充し
ながら循環させる簡素な循環手段となる。In addition, when the resin liquid is circulated by a pump and a resin tank having a predetermined capacity provided in the circulation path, a simple circulating means for circulating the resin liquid reduced with the lifting of the model while replenishing the resin liquid from the resin liquid tank. Becomes
さらに、この樹脂液タンクが、使用される光硬化樹脂
全体の冷却器として作用するので、造形槽内における冷
却が均一且つ安定して行われる。Further, since the resin liquid tank acts as a cooler for the entire photocurable resin to be used, cooling in the modeling tank is performed uniformly and stably.
以下、本発明に係る光硬化樹脂立体造形装置の一実施
例を図面に基づいて具体的に説明する。Hereinafter, an embodiment of a three-dimensional photocurable resin molding apparatus according to the present invention will be specifically described with reference to the drawings.
まず、構成を説明する。 First, the configuration will be described.
この実施例の装置は、造形槽11、造形棚12を備えてお
り、造形槽11には光硬化樹脂、例えば紫外線（以下、UV
ともいう）硬化樹脂の未硬化樹脂液ｌが収容されてい
る。造形槽11は所定の光であるUV光を透過する平板状の
底板部13を有しており、この底板部13に上方から接近・
離間するよう造形棚12が昇降手段14に支持されている。
昇降手段14は、詳細は図示しないが例えばサーボモータ
とボールネジ機構を有し、造形棚12を底板部13に微小間
隙を隔てて対向させ、必要に応じて所定量（後述する断
面層ｑの厚さに対応する量）ずつ上昇させることができ
る。また、底板部13の下方にはUV光を出射する図示しな
いUV光源が設けられており、この光源からのUV光は、可
動スポットビームとして、或は、マスキングによる所定
パターンの光として整形され、底板部13を介して、造形
棚12と底板部13の間の樹機液層を露光する。ここで、UV
光の整形パターンは、造形物を複数の断面層ｑからなる
立体物Ｑとしたときの断面層ｑに対応するパターンであ
り、このUV光により造形棚12と底板部13の間の樹脂液ｌ
が所定形状の断面層ｑに硬化する。なお、造形棚12が底
板部13に最も接近した位置で前記露光がなされるとき、
最初の断面層ｑが形成されるととに造形棚12に接着さ
れ、以後底板部13の移動に伴って各断面層ｑが積層造形
されながら造形棚12に支持されていく。また、底板部13
の上面には断面層ｑの底板部13からの剥離を容易にする
剥離剤がコーティングされている。The apparatus of this embodiment includes a modeling tank 11 and a modeling shelf 12, and the modeling tank 11 is provided with a photocurable resin, for example, an ultraviolet ray (hereinafter, referred to as UV).
(Also referred to as "cured resin"). The modeling tank 11 has a flat bottom plate portion 13 that transmits UV light as a predetermined light, and approaches the bottom plate portion 13 from above.
The modeling shelf 12 is supported by the elevating means 14 so as to be separated therefrom.
Although not shown in detail, the elevating means 14 has, for example, a servomotor and a ball screw mechanism, and makes the modeling shelf 12 face the bottom plate 13 with a small gap therebetween, and if necessary, a predetermined amount (thickness of a section layer q described later). (Corresponding amount). Further, a UV light source (not shown) that emits UV light is provided below the bottom plate portion 13, and the UV light from this light source is shaped as a movable spot beam or light of a predetermined pattern by masking, The tree liquid layer between the modeling shelf 12 and the bottom plate 13 is exposed through the bottom plate 13. Where UV
The light shaping pattern is a pattern corresponding to the sectional layer q when the modeled object is a three-dimensional object Q including a plurality of sectional layers q.
Is cured into a cross-section layer q having a predetermined shape. When the exposure is performed at a position where the modeling shelf 12 is closest to the bottom plate portion 13,
When the first section layer q is formed, it is adhered to the modeling shelf 12, and thereafter each section layer q is supported by the modeling shelf 12 as the bottom plate portion 13 moves while being stacked and formed. Also, the bottom plate 13
Is coated with a release agent for facilitating release of the sectional layer q from the bottom plate portion 13.
一方、造形槽11には底板部13から所定高さに位置する
流出口15及び流入口16が形成されている。流出口15は、
造形槽11に一定量以上の樹脂液ｌが供給されたとき、樹
脂液ｌをオーバーフローさせて造形槽11内の液面を一定
に保つものであり、造形槽11へは循環手段20により流入
口16を通して樹脂液ｌが供給される。この循環手段20
は、樹脂液ｌを貯留する樹脂液タンク21と、樹脂液タン
ク21からの樹脂液ｌを造形槽11に送出するポンプ22と、
樹脂液タンク21及びポンプ22を造形槽11に接続する循環
配管23と、ポンプ22から造形槽11への樹脂流入量を調整
可能な調整バルブ24とからなり、ポンプ22から送出され
て造形槽11内に流入した樹脂液ｌは流出口15からオーバ
ーフローして樹脂液タンク21に戻るようになっている。On the other hand, an outflow port 15 and an inflow port 16 located at a predetermined height from the bottom plate portion 13 are formed in the modeling tank 11. Outlet 15
When a certain amount or more of the resin liquid 1 is supplied to the modeling tank 11, the resin liquid 1 overflows to keep the liquid level in the modeling tank 11 constant. The resin liquid 1 is supplied through 16. This circulation means 20
A resin liquid tank 21 for storing the resin liquid 1, a pump 22 for sending the resin liquid 1 from the resin liquid tank 21 to the modeling tank 11,
It comprises a circulation pipe 23 connecting the resin liquid tank 21 and the pump 22 to the modeling tank 11, and an adjusting valve 24 capable of adjusting the amount of resin flowing from the pump 22 to the modeling tank 11. The resin liquid 1 flowing into the inside overflows from the outlet 15 and returns to the resin liquid tank 21.
25は、樹脂液タンク21に取り付けられた冷却コイルで
あり、この冷却コイル25は図示しない圧縮機、凝縮器、
膨張弁等と共に公知の冷凍サイクルを構成しており、冷
却コイル25内を流れる低温の冷媒（熱媒）によって樹脂
液タンク21内の樹脂液ｌが冷却される。すなわち、樹脂
液タンク21は冷却コイル25と共に樹脂液ｌを冷却する冷
却手段の冷却器となっている。また、冷却コイル25内を
流れる冷媒の流量は、造形槽11の底板部13側で樹脂液温
度を検知する温度センサ19の出力信号に応じ、この温度
センサ19の出力に応動する制御バルブ26の開度変化によ
り制御されるようになっている。Reference numeral 25 denotes a cooling coil attached to the resin liquid tank 21, and the cooling coil 25 includes a compressor (not shown), a condenser,
A known refrigeration cycle is formed together with the expansion valve and the like, and the resin liquid 1 in the resin liquid tank 21 is cooled by a low-temperature refrigerant (heat medium) flowing in the cooling coil 25. That is, the resin liquid tank 21 serves as a cooler of cooling means for cooling the resin liquid 1 together with the cooling coil 25. The flow rate of the refrigerant flowing through the cooling coil 25 is determined by the output signal of the temperature sensor 19 that detects the temperature of the resin liquid on the bottom plate 13 side of the modeling tank 11. It is controlled by a change in the opening.
次に、その造形手順と共に作用を説明する。 Next, the operation will be described together with the molding procedure.
まず、造形槽11内に流出口15に達するまでUV硬化樹脂
の未硬化樹脂液ｌが収容されるとともに樹脂液タンク21
にもこの樹脂液ｌが貯留される。次いで、造形槽11内の
樹脂液ｌに浸るよう昇降手段14によって造形棚12が下降
され、造形棚12と底板部13が微小間隙を隔てた位置で造
形棚12が停止する。次いで、造形槽11の下方から上述の
整形されたUV光が底板部13を介して造形槽11内に照射さ
れ、造形棚12と底板部13の間の樹脂液ｌが露光されて、
造形棚12に接着した状態で最初の断面層ｑが形成され
る。次いで、昇降手段14により造形棚12が所定量移動
（上昇）されると、造形槽11内の樹脂液ｌが例えば毛細
管現象によって、造形棚12に支持された断面層ｑと底板
部13の間に入り込み、次の所定パターンのUV光によって
この樹脂液ｌが露光されると、前の断面層ｑに積層硬化
した次の断面層ｑが形成される。以下、同様な底板部13
の移動と各断面層ｑに対応するパターン露光によって順
次断面層ｑが形成され、複数の断面層ｑを積層した立体
物Ｑが造形される。First, the uncured resin liquid 1 of the UV curable resin is stored in the modeling tank 11 until the resin liquid tank 21 reaches the outlet 15.
This resin liquid 1 is also stored. Next, the modeling shelf 12 is lowered by the elevating means 14 so as to be immersed in the resin liquid 1 in the modeling tank 11, and the modeling shelf 12 stops at a position where the modeling shelf 12 and the bottom plate 13 are separated by a minute gap. Next, the shaped UV light is irradiated into the modeling tank 11 through the bottom plate 13 from below the modeling tank 11, and the resin liquid 1 between the modeling shelf 12 and the bottom plate 13 is exposed,
The first sectional layer q is formed in a state of being adhered to the modeling shelf 12. Next, when the modeling shelf 12 is moved (elevated) by a predetermined amount by the elevating means 14, the resin liquid 1 in the modeling tank 11 is moved between the bottom layer 13 and the section layer q supported by the modeling shelf 12 by, for example, capillary action. When the resin liquid 1 is exposed by the next predetermined pattern of UV light, the next section layer q laminated and cured on the previous section layer q is formed. Hereinafter, the same bottom plate 13
The cross-section layer q is sequentially formed by the movement of and the pattern exposure corresponding to each cross-section layer q, and a three-dimensional object Q in which a plurality of cross-section layers q are stacked is formed.
一方、このような造形作業中において、樹脂液タンク
21内の樹脂液がポンプ22により送出され、流入口16を通
して造形槽11に流入するとともに、流出口15からオーバ
ーフローした樹脂液ｌが樹脂液タンク21に戻る。したが
って、造形作業が進み、造形棚12に支持された断面層ｑ
が造形槽11内の液面より上に引き上げられても、樹脂液
タンク21から補充される樹脂液ｌによって造形槽11内の
液面高さは常に一定に保たれ、造形棚12下への樹脂液ｌ
の入り込み具合も一定に保たれる。この結果、断面層ｑ
が薄い場合であっても、各断面層ｑを十分な形状に造形
して、造形作業の信頼性を高めることができる。また、
樹脂液タンク21内の樹脂液ｌが温度センサ19の検知温度
に応じて冷却コイル25により冷却され、この冷却された
樹脂液ｌが常に造形槽11に流入する。したがって、底板
部13へのUV光の照射及び前記UV光源からの熱によって底
板部13が加熱されても、その加熱量に対応して冷却され
る樹脂液ｌによって底板部13が確実に冷却される。この
結果、造形棚12に支持された断面層ｑの硬化樹脂が熱応
力により変形するようなことが防止され、更に、造形槽
11内の樹脂液ｌの状態が安定したものとなって気泡の発
生等が防止される。On the other hand, during such modeling work, the resin liquid tank
The resin liquid in 21 is pumped out by pump 22 and flows into modeling tank 11 through inlet 16, and resin liquid 1 overflowing from outlet 15 returns to resin liquid tank 21. Accordingly, the modeling operation proceeds, and the sectional layer q supported by the modeling shelf 12 is formed.
Even if is raised above the liquid level in the modeling tank 11, the liquid level in the modeling tank 11 is always kept constant by the resin liquid l replenished from the resin liquid tank 21. Resin liquid
Is kept constant. As a result, the sectional layer q
Is thin, it is possible to form each cross-sectional layer q into a sufficient shape to enhance the reliability of the forming operation. Also,
The resin liquid 1 in the resin liquid tank 21 is cooled by the cooling coil 25 according to the temperature detected by the temperature sensor 19, and the cooled resin liquid 1 always flows into the modeling tank 11. Therefore, even if the bottom plate 13 is heated by the irradiation of the UV light to the bottom plate 13 and the heat from the UV light source, the bottom plate 13 is surely cooled by the resin liquid 1 cooled according to the heating amount. You. As a result, the cured resin of the sectional layer q supported by the modeling shelf 12 is prevented from being deformed by thermal stress, and furthermore, the modeling tank is
The state of the resin liquid 1 in the liquid 11 becomes stable, and generation of bubbles and the like is prevented.
本発明によれば、造形作業中における造形棚下への樹
脂液の入り込み具合を一定にして、造形物の断面層が薄
い場合であっても完全な造形を行うことができ、露光に
より加熱される底板部に対し、造形槽に流入する冷却樹
脂液によって常時安定した冷却効果を発揮させることが
できる。ADVANTAGE OF THE INVENTION According to this invention, it is possible to perform complete modeling even when the cross-section layer of the modeled object is thin, while keeping the degree of entry of the resin liquid below the modeling shelf during the modeling operation, and heating by exposure. A stable cooling effect can be constantly exerted on the bottom plate by the cooling resin liquid flowing into the modeling tank.
また、造形物の引き上げに伴って減少する樹脂液を循
環経路中に設けた所定容量の樹脂液タンクから補充する
とともに、ポンプによって樹脂液を循環させることがで
き、簡素で信頼性の高い循環手段を実現することができ
る。A simple and highly reliable circulating means, which can replenish the resin liquid that decreases as the molded object is pulled up from a predetermined-capacity resin liquid tank provided in the circulation path and circulate the resin liquid by a pump. Can be realized.
さらに、前記樹脂液タンクを使用される光硬化樹脂液
全体の冷却器として作用させるので、造形槽内における
冷却を均一で且つ安定したものにすることができる。Further, since the resin liquid tank functions as a cooler for the entire photocurable resin liquid used, cooling in the modeling tank can be made uniform and stable.
図は本発明に係る光硬化樹脂立体造形装置の一実施例を
示すその概略構成図である。 11……造形槽、 12……造形棚、 13……底板部、 15……流出口、 20……循環手段、 21……樹脂液タンク（冷却器）、 22……ポンプ、 23……循環配管（循環経路）、 25……冷却コイル（冷却手段）、 ｌ……未硬化樹脂液、 Ｑ……立体物、 ｑ……断面層。FIG. 1 is a schematic configuration diagram showing an embodiment of a three-dimensional photocurable resin molding apparatus according to the present invention. 11: Modeling tank, 12: Modeling shelf, 13: Bottom plate, 15: Outlet, 20: Circulation means, 21: Resin liquid tank (cooler), 22: Pump, 23: Circulation Pipe (circulation path), 25: cooling coil (cooling means), l: uncured resin liquid, Q: three-dimensional object, q: sectional layer.
Claims (3)
光硬化樹脂の未硬化樹脂液を収容する造形槽と、造形槽
内の樹脂液に浸されて底板部と接近および離間する造形
棚と、底板部の下方から造形槽内に所定の光を照射する
光源と、を備え、前記底板部と造形棚の間の樹脂液を光
源からの光により所定パターンで硬化され、造形棚の移
動に伴って立体物を積層造形する光硬化樹脂立体造形装
置において、 前記造形槽に底板部から所定高さに位置する流出口を形
成するとともに、該流出口を通して造形槽内の未硬化樹
脂液をオーバーフローさせながら循環させる循環手段を
設け、該循環手段の循環経路に、造形槽に流入する樹脂
液を冷却する冷却手段を設けたことを特徴とする光硬化
樹脂立体造形装置。A molding tank for storing an uncured resin liquid of a photo-curable resin on the bottom plate, and a bottom plate which is immersed in the resin liquid in the molding tank to approach the bottom plate. A molding shelf to be separated, and a light source for irradiating predetermined light into the modeling tank from below the bottom plate portion, and the resin liquid between the bottom plate portion and the modeling shelf is cured in a predetermined pattern by light from the light source, In a photocurable resin three-dimensional molding apparatus that laminates and molds a three-dimensional object with the movement of a molding shelf, an outlet located at a predetermined height from a bottom plate portion is formed in the molding tank, and an outlet in the molding tank is formed through the outlet. A three-dimensional photocurable resin molding apparatus, comprising: a circulating means for circulating the cured resin liquid while overflowing the cooling liquid; and a cooling means for cooling the resin liquid flowing into the molding tank in a circulation path of the circulating means.
液タンクと、該タンクからの未硬化樹脂液を造形槽に送
出するポンプとを有することを特徴とする請求項１記載
の光硬化樹脂立体造形装置。2. The light according to claim 1, wherein the circulation means includes a resin liquid tank having a predetermined volume in a circulation path, and a pump for sending the uncured resin liquid from the tank to a molding tank. Cured resin three-dimensional molding device.
構成することを特徴とする請求項２記載の光硬化樹脂立
体造形装置。3. The three-dimensional photocurable resin molding apparatus according to claim 2, wherein a resin liquid tank forms a cooler of said cooling means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2260700A JP2948893B2 (en) | 1990-09-28 | 1990-09-28 | Photocurable resin three-dimensional molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2260700A JP2948893B2 (en) | 1990-09-28 | 1990-09-28 | Photocurable resin three-dimensional molding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04135827A JPH04135827A (en) | 1992-05-11 |
| JP2948893B2 true JP2948893B2 (en) | 1999-09-13 |
Family
ID=17351562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2260700A Expired - Lifetime JP2948893B2 (en) | 1990-09-28 | 1990-09-28 | Photocurable resin three-dimensional molding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2948893B2 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPH04135827A (en) | 1992-05-11 |
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