CN113478827A - 一种高温激光选区烧结装备的高温活动式密封机构 - Google Patents

一种高温激光选区烧结装备的高温活动式密封机构 Download PDF

Info

Publication number
CN113478827A
CN113478827A CN202110876851.2A CN202110876851A CN113478827A CN 113478827 A CN113478827 A CN 113478827A CN 202110876851 A CN202110876851 A CN 202110876851A CN 113478827 A CN113478827 A CN 113478827A
Authority
CN
China
Prior art keywords
carbon fiber
temperature
metal arm
conveyor belt
synchronous conveyor
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.)
Pending
Application number
CN202110876851.2A
Other languages
English (en)
Inventor
闫春泽
陈鹏
王卫
史玉升
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Huake Three Dimensional Technology Co ltd
Original Assignee
Zhejiang Huake Three Dimensional Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Huake Three Dimensional Technology Co ltd filed Critical Zhejiang Huake Three Dimensional Technology Co ltd
Priority to CN202110876851.2A priority Critical patent/CN113478827A/zh
Publication of CN113478827A publication Critical patent/CN113478827A/zh
Pending legal-status Critical Current

Links

Images

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
    • B29C64/20—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
    • B29C64/205—Means for applying layers
    • B29C64/218—Rollers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Furnace Details (AREA)

Abstract

本发明于先进制造配套设备技术领域，公开了一种高温激光选区烧结装备的高温活动式密封结构，包括成形腔、铺粉辊、运动通道、碳纤维布、碳纤维夹层、碳纤维密封刷、金属臂、石墨隔层板、步进电机、同步传送带、晶格散热片。高温活动式密封结构主要针对高温铺粉辊的运动机构进行活动式密封，实现装备内部成形时的氧含量低于0.8％，同时隔绝装备内部热量外散，保证成形腔内的温度均匀性、以及外部步进电机和同步传送带的使用寿命。

Description

一种高温激光选区烧结装备的高温活动式密封机构
技术领域
本发明属于先进制造配套设备技术领域，更具体地，涉及一种高温激光选区烧结装备的高温活动式密封机构。
背景技术
高温激光选区烧结(High Temperature-Selective Laser Sintering，SLS)是增材制造技术(Additive Manufacturing,AM)的重要分支，其相比于传统激光选区烧结(SLS)技术最大的特点在于成形温度。目前国内外SLS技术主要用于成形较低熔点的热塑性聚合物材料(如尼龙12、尼龙11、TPU、PP、PS及其复合材料)。而对于高性能聚芳醚酮(PAEKs)、聚芳酰胺(Aromafic Polyamides)这类特种聚合物材料来说，其一般具有较高的熔点(例如聚醚醚酮PEEK材料，其熔点约为340℃)。为防止成形过程中零件翘曲变形，要求HT-SLS成形过程中腔体的预热温度设置在330-337℃的(激光烧结窗口)范围内。而对于老化的PEEK粉末其熔点更高，烧结窗口更窄，预热温度设置更是接近400℃。
PEEK粉末材料在330～400℃高温成形时老化问题十分严重，装备的步进电机也极易受损，究其原因主要在于HT-SLS装备铺粉辊运动机构的密封性。一方面，装备内部因铺粉辊运动密封差，导致氧含量升高，PEEK粉末老化严重，必须提高氩气流量才可解决，但这易引起腔室内弥散粉尘，激光保护镜污染，实际烧结功率降低。老化的PEEK粉末白度严重降低，流动性下降，必须混合新粉才能进行打印，导致PEEK粉末的重复利用率大幅降低，HT-SLS加工成本大幅提高。另一方面，步进电机、同步传送带因铺粉辊运动机构密封差，与装备内330～400℃高温成形腔存在热对流，作为长时间工作部件易损坏，更换成本亦导致整个加工成本的大幅提高。因此，必须对整个HT-SLS装备铺粉辊运动机构的密封性进行有效的控制，其技术难点主要集中在以下两点：(1)在成形过程铺粉辊运动时，难以同时保证运动通道的通畅与密封，确保氧含量低于0.8％；(2)铺粉辊通过金属臂连接到装备外部的步进电机，装备内部热量一方面通过运动通道对外部电机进行热对流，另一方面也通过金属臂对传送带和电机进行传热，因此严重影响传送带和步进电机的使用寿命。
发明内容
针对现有技术的以上缺陷或改进需求，本发明提供了一种高温激光选区烧结装备的高温活动式密封机构，主要针对高温铺粉辊的运动机构进行活动式密封，实现装备内部成形时的氧含量低于0.8％，同时隔绝装备内部热量外散，保证外部步进电机、同步传送带的使用寿命。
按照本发明，提供了一种高温激光选区烧结装备的高温活动式密封机构，包括成形腔、铺粉辊、运动通道、碳纤维布、碳纤维夹层、碳纤维密封刷、金属臂、石墨隔层板、步进电机、同步传送带、晶格散热片。
所述铺粉辊置于成形腔内部，通过金属臂穿过运动通道连接到成形腔外部的各个部件。
所述运动通道在成形腔外壁上由内向外依次布置了碳纤维夹层与碳纤维布。其中，碳纤维夹层为两层结构，固定在成形腔外壁上，内置双层碳纤维密封刷，可在金属臂带动铺粉辊运动时进行活动式密封。外侧碳纤维布固定在金属臂上，与金属臂进行联动。
所述碳纤维密封刷为回旋式环状结构，上下左右均存在部分重叠，并为双层内置结构，因而可在活动式密封的同时进行隔热，控制成形腔内部的氧含量，并保护外部的步进电机与同步传送带。
所述金属臂连接到成形腔外部后设置晶格散热片，提高金属臂的散热效率，并减缓热量进一步向外部传导。
所述石墨隔层板在外侧固定于同步传送带上，在内测与金属臂上下连接，因而可在高度方向上隔绝金属臂的传热，防止热量传递至同步传送带，减缓同步传送带固定部位的老化。
所述步进电机通过齿轮传动带动同步传送带运动，进而带动石墨隔层板、金属臂以及铺粉辊进行联动。
总体而言，本发明所构思的以上技术方案与现有技术相比，主要具备以下的技术优点：
1、对于成形腔而言，高温活动式密封机构可在铺粉辊运动时对内部的氧含量进行很好的控制，保证与外部空气的隔绝。同时，避免了散热，保证了温度场的均匀性，这对于高温成形而言是至关重要的；
2、对于腔体外的部件而言，可避免热量外散造成的步进电机老化，同时也减缓了同步传送带的老化，降低了整台装备的维修与折旧成本；
附图说明
图1是按照本发明所构建的高温活动式密封机构的整体结构示意图；
图2是高温活动式密封机构内部的碳纤维结构示意图；
1-成形腔，2-铺粉辊，3-运动通道，31-碳纤维布，32-碳纤维夹层，33-碳纤维密封刷，4-金属臂，5-石墨隔层板，6-步进电机，7-同步传送带,8-晶格散热片。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
下面结合附图1和2一起进行整个工作过程的说明。整体来说，铺粉辊2置于高温环境的成形腔1内部，并通过金属臂4穿过成形腔1外壁的运动通道3连接外部的部件。
当金属臂4伸出成形腔1后，设置晶格散热片8进行初步散热，提高金属臂4的散热效率，并减缓热量进一步向外部传导。而后在金属臂4下方连接石墨隔层板5进行纵向隔热，防止热量传递至同步传送带7，减缓同步传送带7的老化。石墨隔层板5安装在同步传送带7上，并由步进电机6进行驱动运转，从而带动内部铺粉辊2联动铺粉。
在成形腔1外壁的运动通道3上，由内向外依次布置了碳纤维夹层32与碳纤维布31。其中，碳纤维夹层32为两层结构，固定在成形腔1外壁上，内置双层碳纤维密封刷33，可在金属臂4带动铺粉辊2运动时进行活动式密封。外侧碳纤维布31固定在金属臂4上，与金属臂4进行联动。碳纤维密封刷33为回旋式环状结构，上下左右均存在部分重叠，并为双层内置结构。在成形过程中，当铺粉辊2运动时，碳纤维密封刷33的开口跟随金属臂4进行移动，未运动的位置保持密封。同时，外部固定的碳纤维布31在金属臂4移动时紧贴内测的碳纤维夹层32与内置的碳纤维密封刷33，保证了成形腔1内的多层密封。因而可在活动式密封的同时进行隔热，控制成形腔内部的氧含量，并保护外部的步进电机与同步传送带。
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (4)

1.一种高温激光选区烧结装备的高温活动式密封机构，其特征在于，包括成形腔1、铺粉辊2、运动通道3、碳纤维布31、碳纤维夹层32、碳纤维密封刷33、金属臂4、石墨隔层板5、步进电机6、同步传送带7、晶格散热片8。其中：
铺粉辊2置于成形腔1内部，通过金属臂4穿过运动通道3连接到成形腔1外部的石墨隔层板5。石墨隔层板5固定于同步传送带7上，由步进电机6通过齿轮传动带动同步传送带7运动，进而带动石墨隔层板5、金属臂4以及铺粉辊2进行联动。
2.如权利要求1所述的高温活动式密封机构，运动通道3在成形腔1外壁上由内向外依次布置了碳纤维夹层32与碳纤维布31。其中，碳纤维夹层32为两层结构，固定在成形腔1外壁上，内置双层碳纤维密封刷33，可在金属臂4带动铺粉辊2运动时进行活动式密封。外侧碳纤维布31固定在金属臂4上，与金属臂4进行联动。
3.如权利要求1所述的高温活动式密封机构，碳纤维密封刷33为回旋式环状结构，上下左右均存在部分重叠，并为双层内置结构。
4.如权利要求1所述的高温活动式密封机构，金属臂4连接到成形腔1外部后设置晶格散热片8。
CN202110876851.2A 2021-07-31 2021-07-31 一种高温激光选区烧结装备的高温活动式密封机构 Pending CN113478827A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110876851.2A CN113478827A (zh) 2021-07-31 2021-07-31 一种高温激光选区烧结装备的高温活动式密封机构

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110876851.2A CN113478827A (zh) 2021-07-31 2021-07-31 一种高温激光选区烧结装备的高温活动式密封机构

Publications (1)

Publication Number Publication Date
CN113478827A true CN113478827A (zh) 2021-10-08

Family

ID=77943886

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110876851.2A Pending CN113478827A (zh) 2021-07-31 2021-07-31 一种高温激光选区烧结装备的高温活动式密封机构

Country Status (1)

Country Link
CN (1) CN113478827A (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000120877A (ja) * 1998-10-15 2000-04-28 Sando Iron Works Co Ltd 気体処理室のシール装置
CN205008580U (zh) * 2015-08-07 2016-02-03 湖南华曙高科技有限责任公司 一种选择性激光烧结设备
CN206812441U (zh) * 2017-05-23 2017-12-29 北京易加三维科技有限公司 具有加工舱室运动密封结构的选择性激光烧结铺粉机构
DE202019001440U1 (de) * 2019-03-28 2019-04-15 MTU Aero Engines AG Bürstendichtung in einer Anlage zur generativen Herstellung von Bauteilen und Anlage
US20190134715A1 (en) * 2017-11-03 2019-05-09 Concept Laser Gmbh Powder module

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000120877A (ja) * 1998-10-15 2000-04-28 Sando Iron Works Co Ltd 気体処理室のシール装置
CN205008580U (zh) * 2015-08-07 2016-02-03 湖南华曙高科技有限责任公司 一种选择性激光烧结设备
CN206812441U (zh) * 2017-05-23 2017-12-29 北京易加三维科技有限公司 具有加工舱室运动密封结构的选择性激光烧结铺粉机构
US20190134715A1 (en) * 2017-11-03 2019-05-09 Concept Laser Gmbh Powder module
DE202019001440U1 (de) * 2019-03-28 2019-04-15 MTU Aero Engines AG Bürstendichtung in einer Anlage zur generativen Herstellung von Bauteilen und Anlage

Similar Documents

Publication Publication Date Title
US10821675B2 (en) Independently temperature-controlled high-temperature selective laser sintering frame structure
CN105695982A (zh) 一种增材制造铜钨功能梯度材料电触头的方法
CN107379527A (zh) 一种适用于铺粉式增材制造的预热方法以及装置
CN106111986A (zh) 一种激光3d打印设备
CN105014976B (zh) 一种密封式选择性激光熔融设备
CN111250853B (zh) 基于电子束熔丝增材制造的同步冷却装置及方法
CN206139838U (zh) 一种激光3d打印设备
CN113478827A (zh) 一种高温激光选区烧结装备的高温活动式密封机构
CN105693248A (zh) 一种硫化镉靶材制备方法及装置
WO2024082510A1 (zh) 一种锯链及链锯总成
KR20220150196A (ko) 3층 공압출 리튬 이온 배터리 분리막의 제조 방법
WO2004070301A1 (ja) 固体移送スクリューのシール構造およびそれを用いた還元金属の製造方法
CN212451169U (zh) 大尺寸石英坩埚熔制设备
CN107314669B (zh) 氢气隧道炉及陶瓷电路元件加工设备
CN111535005A (zh) 一种用于裁剪多层布料的防熔融裁床
CN111207591A (zh) 步进炉用悬臂辊结构
CN219301304U (zh) 一种工业炉保温罩
KR102635896B1 (ko) 프릿 씰 부재
CN211373238U (zh) 炉底盖板以及炉体
CN111397361A (zh) 一种带有气冷功能的真空氢气炉的炉胆结构
CN115863004B (zh) 一种六氟化硫气体绝缘干式变压器
CN220692120U (zh) 一种电动车锂电池用散热机构
CN218811330U (zh) 一种用于玻璃深加工的热熔机
CN109290575A (zh) 一种带有柔性挡板的增材制造铺粉装置
CN220201757U (zh) 光学玻璃连续二次成型装置

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination