CN110549629A - 立体打印装置 - Google Patents

立体打印装置 Download PDF

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Publication number
CN110549629A
CN110549629A CN201810553065.7A CN201810553065A CN110549629A CN 110549629 A CN110549629 A CN 110549629A CN 201810553065 A CN201810553065 A CN 201810553065A CN 110549629 A CN110549629 A CN 110549629A
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trough
origin
containing groove
printing apparatus
target
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黄澄富
李安修
周金源
林财亿
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Kinpo Electronics Inc
XYZ Printing Inc
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Kinpo Electronics Inc
XYZ Printing Inc
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Priority to CN201810553065.7A priority Critical patent/CN110549629A/zh
Priority to US16/132,489 priority patent/US10753781B2/en
Priority to JP2019006803A priority patent/JP6634170B2/ja
Priority to EP19154109.3A priority patent/EP3575061B1/en
Priority to ES19154109T priority patent/ES2834385T3/es
Publication of CN110549629A publication Critical patent/CN110549629A/zh
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    • 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
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/227—Driving means
    • B29C64/241—Driving means for rotary motion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • 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
    • 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
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • 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
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/255—Enclosures for the building material, e.g. powder containers
    • 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
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet

Abstract

本发明提供一种立体打印装置，包括机体、盛槽、原点标靶、传感器以及控制模块。盛槽可旋转地组装于机体，盛槽用以盛装液态成型材。原点标靶设置于盛槽且随盛槽旋转。传感器设置于机体且位于液态成型材的上方以感测液态成型材的液面高度。控制模块电性连接盛槽与传感器并驱动盛槽旋转。传感器位于原点标靶的旋转路径的上方，控制模块通过传感器感测到原点标靶而定位盛槽的旋转原点。

Description

立体打印装置
技术领域
本发明涉及一种立体打印装置。
背景技术
随着科技的日益发展，许多利用逐层建构模型等加成式制造技术(additivemanufacturing technology)来建造物理三维(three-dimensional,3-D)模型的不同方法已纷纷被提出。一般而言，加成式制造技术是将利用电脑辅助设计(computer-aideddesign,CAD)等软件建构的3D模型的设计数据转换为连续堆叠的多个薄(准二维)横截面层。
目前已发展出许多可以形成多个薄横截面层的方式。举例来说，光敏树脂(photopolymer)作为多数立体打印装置所用的液态成型材，通过在液态成型材中设置移动平台，并依据3D模型的设计数据建构的X-Y-Z坐标驱动光源沿着X-Y坐标移动照射液态成型材，从而将液态成型材固化出正确的横截面层形状。接着，随着移动平台沿Z轴移动，液态成型材便可在逐层固化及堆叠的状态下进而在移动平台上形成立体物件。
然而，立体打印过程中需对液态成型材在盛槽内的储量以及盛槽旋转状态分别进行监控，前者可确保液态成型材在立体打印过程中不致匮乏，而后者则是通过旋转运动而调整盛槽的位置，以使成型的立体物件顺利地从盛槽脱离，或是避免盛槽以重复区域进行立体打印而容易导致损耗集中的情形。
发明内容
本发明是针对一种立体打印装置，除了以传感器感测液态成型材在盛槽内的液面高度外，还能以传感器对盛槽的原点进行辨识与定位。
根据本发明的实施例，立体打印装置，包括机体、盛槽、原点标靶、传感器以及控制模块。盛槽可旋转地组装于机体，盛槽用以盛装液态成型材，且液态成型材在盛槽内的液面高度存在可变范围。原点标靶设置于盛槽且随盛槽旋转，原点标靶相对于盛槽的高度位于液面高度的可变范围之外。传感器设置于机体且位于液态成型材的上方以感测液态成型材的液面高度。控制模块电性连接盛槽与传感器并驱动盛槽旋转。传感器位于原点标靶的旋转路径的上方，控制模块通过传感器感测到原点标靶而定位盛槽的旋转原点。
基于上述，立体打印装置通过在盛槽设置原点标靶，以让原点标靶随着盛槽而旋转，且让原点标靶在盛槽上的高度位置是在液态成型材的液面高度的可变范围之外。同时，还在液态成型材的上方设置传感器，且让传感器位于原点标靶的旋转路径的上方。如此一来，传感器除了作为感测液态成型材在盛槽内的液面高度外，当原点标靶行经传感器下方时也能被感测，因而让控制模块得以辨识出盛槽的原点位置，而由此作为基准而能对盛槽施予进一步的旋转控制。据此，立体打印装置是以同一个传感器即能完成液态成型材的液面高度感测以及盛槽的定位等需求。
附图说明
包含附图以便进一步理解本发明，且附图并入本说明书中并构成本说明书的一部分。附图说明本发明的实施例，并与描述一起用于解释本发明的原理。
图1是依据本发明一实施例的立体打印装置的示意图；
图2是图1的立体打印装置于另一状态的示意图；
图3是图1的立体打印装置部分构件的驱动关系图；
图4是立体打印装置的局部剖视图；
图5是依据本发明另一实施例的盛槽的局部示意图；
图6是图5的盛槽的局部剖视图。
附图标号说明
100：立体打印装置；
110：机体；
112：基座；
114：龙门架；
120：成型平台；
130、330：盛槽；
131、331：槽顶；
132、332：内部槽底；
140：传感器；
150：原点标靶；
160：控制模块；
200：液态成型材；
210：液面高度；
333：凹陷；
350：外部基底；
A1、A2、A3、A4：高度；
C1、C2：剖面。
具体实施方式
现将详细地参考本发明的示范性实施例，示范性实施例的实例说明于附图中。只要有可能，相同元件符号在附图和描述中用来表示相同或相似部分。
图1是依据本发明一实施例的立体打印装置的示意图。图2是图1的立体打印装置于另一状态的示意图。图3是图1的立体打印装置部分构件的驱动关系图。图4是立体打印装置的局部剖视图。请同时参考图1至图4，在本实施例中，立体打印装置100例如是立体光刻设备(stereolithographyapparatus,SLA)，其包括机体110、成型平台120、盛槽130、传感器140、原点标靶150以及控制模块160。同时，立体打印装置100通过设置于盛槽130底部的固化光源(未示出)，以让控制模块160驱动固化光源以提供固化光线，并使固化光线穿过透明的盛槽130底部，而能对盛槽130内的液态成型材200进行照射固化。
详细来说，机体110包括基座112与设置在基座112上的龙门架114，盛槽130通过其驱动单元(未示出)而受控于控制模块160，以使盛槽130可旋转地位于基座112上。再者，成型平台120可上、下移动地设置于龙门架114，以让成型平台120通过其驱动单元(未示出)而受控制于控制模块160，以使成型平台120能移入或移出盛槽130。
在立体打印过程中，控制模块160控制并驱动成型平台120移入盛槽130以接触(或浸入)其内的液态成型材200，接着，控制模块160便依据所欲成型立体物件的轮廓的相关数字信息，而驱动固化光源提供固化光线以对特定位置的液态成型材200进行扫描照射并固化，以在成型平台120与盛槽130底部之间形成固化层，而后在成型平台120处于固定状态时再驱动盛槽130旋转，以让固化层从盛槽130底部脱离。随着重复上述固化、脱离等动作，便能让多个固化层逐次堆叠在成型平台120上，直至完成立体物件。在此需说明的是，上述仅略说相关立体打印动作，其余未提及者已能从现有技术中得知故不再赘述。
请再参考图4，其是图1或图2的立体打印装置100沿剖面C1所产生的局部剖视图。如前述，为了达到监控液态成型材200在盛槽130内的储存量，以作为立体打印是否需补充注液的判断依据，本实施例将原点标靶150设置于盛槽130以随着盛槽130旋转。同时，传感器140通过支架结构组装于机体110的基座112且延伸至盛槽130内而位于液态成型材200的上方，以藉此对盛槽130提供定位功能，而有利于控制模块160以此作为判别打印的位置信息，而决定适当的打印区域及位置，进一步地避免盛槽130因在固定位置进行打印动作而造成白化耗损。
在此，传感器140例如是超音波液面计或激光液面计，用以感测液态成型材200在盛槽130内的液面高度210(或其变化)，以供控制模块160监控盛槽130内的液态成型材200的储量。再者，原点标靶150是设置于盛槽130上的挡片，其从盛槽130的槽壁延伸至液态成型材200的上方。如此一来，当原点标靶150随着盛槽130而旋转时，传感器140实质上位于原点标靶150的旋转路径的上方。
更重要的是，以盛槽130作为基准，液态成型材200在盛槽130内的液面高度210受限于盛槽130的容积深度，也就是盛槽130的内部槽底132(最低点)与槽顶131(最高点)之间，而存在位于高度A1与高度A2之间的可变范围(内部槽底132具有高度A1，槽顶131具有高度A2，高度A1≦液面高度210≦高度A2)。同时，原点标靶150相对于盛槽130的高度则是在所述可变范围之外，而在本实施例中，原点标靶150的高度是图4所示的高度A3，也就是本实施例的原点标靶150相对于盛槽130的高度A3是高于盛槽130的最高点，所述最高点即是前述槽顶131的高度A2。
据此，当原点标靶150旋转行经传感器140的下方时，因原点标靶150的高度异于液态成型材200的液面高度而被感测到且明显不在液面高度210的可变范围内，进而使控制模块160得以辨识并定位出盛槽130的旋转原点，即原点标靶150被视为盛槽130在旋转过程中的原点。因此，控制模块160便能以原点标靶150为基准，而据以对盛槽130提供定位功能，并藉此判别立体打印的位置信息，使盛槽130受控旋转而得以避免上述问题发生，进而得以提升立体打印品质与延长盛槽130的寿命。
基于上述，本发明的立体打印装置100得以通过单一传感器140而同时对液态成型材200在盛槽130内的液面高度210进行感测，以及通过辨识出原点标靶150而定位出盛槽130的原点。
图5是依据本发明另一实施例的盛槽的局部示意图。图6是图5的盛槽的局部剖视图，其是沿着剖面C2所产生。请同时参考图5与图6，在本实施例中，盛槽330具有凹陷333，且前述实施例的传感器140在本实施例中是设置在凹陷333的旋转路径上方。再者，盛槽330还具有位于凹陷333处的外部基底350，从图6可明显得知，液态成型材200在盛槽330内的液面高度210同样存在位于高度A1(内部槽底332)与高度A2(槽顶331)之间的可变范围，而与前述实施例不同的是，本实施例的原点标靶则是前述位于凹陷333处的外部基底350，其具有高度A4，且高度A4<高度A1，也就是外部基底350在盛槽330的高度A4是低于盛槽330的最低点，所述最低点即是盛槽330的内部槽底332。
更进一步地说，盛槽330还具有相邻凹陷333的局部，所述局部也就是图5所示的槽顶331，因此在盛槽330的旋转过程中，无论是以槽顶331与凹陷333的顺序行经传感器140，或以凹陷333与槽顶331的顺序行经传感器140，由于凹陷333处有外部基底350的存在，因此对传感器140而言，其所感测到的高度差为高度A2-高度A4，明显大于所述液面高度210的可变范围(高度A2-高度A1)，由此通过感测到高度差的突然巨变，而让控制模块160得以定位出盛槽330的原点即在于凹陷333处的外部基底350(原点标靶)。
综上所述，在本发明的上述实施例中，立体打印装置通过同一个传感器设置在液态成型材的上方，以在盛槽旋转时，液态成型材与原点标靶皆能轮流受到传感器的感测，因此立体打印装置的控制模块能据以对液态成型材的液面高度进行监控，也能在感测到原点标靶时，通过原点标靶的高度异于液面高度的可变范围，或是原点标靶与盛槽相邻局部的高度差大于所述可变范围，进而定位出盛槽的旋转原点，由此作为控制模块进一步控制盛槽旋转状态的依据。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (11)

1.一种立体打印装置，其特征在于，包括：
机体；
盛槽，可旋转地组装于所述机体，所述盛槽用以盛装液态成型材；
原点标靶，设置于所述盛槽且随所述盛槽旋转；
传感器，设置于所述机体且位于所述液态成型材的上方以感测所述液态成型材在所述盛槽内的液面高度；以及
控制模块，电性连接所述盛槽与所述传感器并驱动所述盛槽旋转，且所述传感器位于所述原点标靶的旋转路径的上方，当所述原点标靶行经所述传感器的下方时，所述控制模块通过所述传感器感测到所述原点标靶而定位出所述盛槽的旋转原点。
2.根据权利要求1所述的立体打印装置，其特征在于，所述原点标靶相对于所述盛槽的高度高于所述盛槽的最高点，或所述原点标靶相对于所述盛槽的高度低于所述盛槽的最低点。
3.根据权利要求2所述的立体打印装置，其特征在于，所述盛槽的最低点是所述盛槽的内部槽底。
4.根据权利要求2所述的立体打印装置，其特征在于，所述原点标靶是所述盛槽的外部基底。
5.根据权利要求4所述的立体打印装置，其特征在于，所述盛槽具有凹陷，所述外部基底位于所述凹陷处。
6.根据权利要求1所述的立体打印装置，其特征在于，所述液态成型材在所述盛槽内的液面高度存在可变范围，且所述原点标靶相对于所述盛槽的高度位于所述可变范围之外。
7.根据权利要求5所述的立体打印装置，其特征在于，在所述原点标靶的旋转路径上，所述盛槽具有邻接于所述原点标靶的至少一局部。
8.根据权利要求7所述的立体打印装置，其特征在于，所述至少一局部是所述盛槽的槽顶。
9.根据权利要求6所述的立体打印装置，其特征在于，所述可变范围大于等于所述盛槽的内部槽底高度，且小于等于所述盛槽的槽顶高度。
10.根据权利要求1所述的立体打印装置，其特征在于，所述原点标靶是设置于所述盛槽上的挡片，从所述盛槽的槽壁延伸至所述液态成型材的上方。
11.根据权利要求1所述的立体打印装置，其特征在于，所述传感器是超音波液面计或激光液面计。
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