CN109420767B - 三维造型装置 - Google Patents
三维造型装置 Download PDFInfo
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- 239000000843 powder Substances 0.000 claims abstract description 82
- 229910052751 metal Inorganic materials 0.000 claims abstract description 72
- 239000002184 metal Substances 0.000 claims abstract description 72
- 238000000465 moulding Methods 0.000 claims abstract description 44
- 239000011261 inert gas Substances 0.000 claims abstract description 39
- 239000004071 soot Substances 0.000 claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000007873 sieving Methods 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 238000010894 electron beam technology Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 11
- 238000007254 oxidation reaction Methods 0.000 abstract description 11
- 239000000428 dust Substances 0.000 abstract description 8
- 238000004880 explosion Methods 0.000 abstract description 8
- 239000000779 smoke Substances 0.000 abstract description 4
- 238000003475 lamination Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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Abstract
本发明提供一种三维造型装置,在回收的金属粉末和烟尘的输送路径中抑制金属粉末的氧化、进而抑制以该一下子的氧化为原因的粉尘爆炸。在能够达成上述课题的、具有造型工作台(31)、涂刮器(32)、烧结装置、切削装置的三维造型装置中,设有输送路径(4),该输送路径用于将经过所述切削装置的切削后排出到造型箱(1)的外侧的金属粉末和烟尘、以及未达到所述层积而排出到处于包围造型箱(1)的状态的腔室(2)的外侧的金属粉末分别输送到位于粉末箱(6)的上侧的筛选机(5),在各输送路径(4)的入口(40)设置不与金属粉末反应的惰性气体的供给装置,由此达成上述课题。
Description
技术领域
本发明以三维造型装置为技术领域,该三维造型装置立足于如下基本构成,即,在基于利用涂刮器的行进进行金属粉末的层积、利用激光束或电子束的照射进行烧结、利用刀具的旋转进行切削这样的各工序的三维造型装置中,向造型后回收的金属粉末和烟尘(fume,烟、烟气)的输送路径供给惰性气体。
背景技术
在以金属粉末为原材料的三维造型装置中,向处于包围了可上下动地支撑造型物的造型工作台的状态的造型箱内,供给氮气、氖气、氩气那样的不与金属粉末反应的惰性气体,由此使造型箱内的氧的浓度降低且抑制金属粉末的氧化,这属于周知的技术常识。
在这样的三维造型装置中,在处于包围了造型工作台的状态的造型箱的外侧回收因切削而产生的烟尘和金属粉末,而且,在配置于造型箱的周围且处于包围了该造型箱的状态的腔室的外侧排出并回收并未实现层积的金属粉末后,经由筛选机而使之收纳于粉末箱,进而向粉末供给装置输送,由此对金属粉末进行再利用,这也是周知的技术事项。
然而,在从造型箱和腔室排出金属粉末后到达筛选机的输送路径中,作为输送对象的金属粉末会氧化,有时会在该金属粉末的再利用时产生障碍。
而且,在钛、铝等可燃性金属粉末的输送时,有时会产生因金属粉末一下子氧化而引起粉尘爆炸这样的事故,尤其是,在输送路径中位于金属粉末即将下落到筛选机之前的最顶部的阶段,由于金属粉末彼此的碰撞而存在易于产生这样的爆炸的倾向。
然而,在以往技术中,并未在技术上考虑到在从造型箱回收的烟尘和金属粉末的到筛选机的输送路径、以及从腔室回收的金属粉末的到筛选机的输送路径中,抑制金属粉末的氧化。
例如,专利文献1和专利文献2公开了如下的构成:向烟尘收集器供给氮气,进而从该烟尘收集器回收氮气,从而加以再利用(专利文献1的图1、2和0025段、专利文献2的图1、2和0030段)。
但是,在上述构成中,却并未对向直到烟尘收集器为止的烟尘的输送路径供给氮气有所公开或者启示,更不用说对向用于再利用金属粉末的输送路径供给氮气有任何的公开或者启示。
专利文献
专利文献1:日本特开2016-216773号公报
专利文献2:日本特开2017-48408号公报
发明内容
发明要解决的课题
本发明的课题是,提供一种在回收的金属粉末和烟尘的输送路径中抑制金属粉末的氧化、进而抑制因一下子进行了该氧化导致的粉尘爆炸的三维造型装置的构成。
用于解决课题的手段
为了解决上述课题,本发明的基本构成由三维造型装置构成,该三维造型装置具有在造型箱内上升和下降的造型工作台、通过水平方向移动来散布金属粉末且形成该金属粉末的层积的涂刮器、利用激光束或电子束的照射的烧结装置、以及利用刀具的旋转的切削装置,在该三维造型装置中,设有输送路径,该输送路径用于将经过所述切削装置的切削后排出到造型箱的外侧的金属粉末和烟尘、以及未达到构成所述层积而排出到处于包围造型箱的状态的腔室的外侧的金属粉末分别输送到位于粉末箱的上侧的筛选机,通过用设置于各输送路径的入口的压缩机对不与金属粉末反应的惰性气体进行压入和/或用设置于各输送路径的末端的吸引装置对所述惰性气体进行吸入,一举实现所述惰性气体的供给、以及所述输送路径中的金属粉末和烟尘的输送。
发明效果
在立足于上述基本构成的本发明中,通过抑制回收的金属粉末在输送路径中的氧化、进而抑制以一下子的氧化为原因的粉尘爆炸,能够在安全状态下对已净化了的金属粉末进行再利用。
附图说明
图1是表示实施例1的构成的示意图。
图2是表示实施例2的构成的示意图。
图3是表示上述基本构成的示意图。
标号说明
1 造型箱
10 三维造型物
11 造型箱中的上侧排出口
12 造型箱中的下侧排出口
13 回收器
14 下落管
15 连通惰性气体的排出口和输送路径的管
2 腔室
21 回收器
22 下落管
31 造型工作台
32 涂刮器
4 输送路径
40 输送路径的入口
41 反馈路径
5 筛选机(筛网机)
6 粉末箱
61 氧浓度计
62 控制装置
7 粉末供给装置
8 惰性气体的供给装置和压缩机
9 吸引装置
具体实施方式
在上述基本构成中,如图3所示,向造型箱1的外侧排出经过了切削工序的金属粉末和烟尘,将在处于包围了造型箱1的状态的腔室2的外部未形成层积的金属粉末排出到该腔室2的外侧。
这样,从造型箱1排出的金属粉末和烟尘由回收器21回收,经过下端与输送路径4相连通的下落管14后下落到输送路径4内。
同样地,从腔室2排出的属粉末由回收器21回收,经过下端与输送路径4相连通的下落管22后也都下落到输送路径4。
然后,分别下落到输送路径4的金属粉末和烟尘、以及金属粉末都经过输送路径4,然后通过筛选机5的筛选而仅将金属粉末收纳于造型箱1以再利用。
在基本构成中,如图3所示,在各输送路径4的入口40、即输送的起始位置,分别设置惰性气体的供给装置8。
作为惰性气体,不仅包括氖、氩那样的本来的惰性气体、即狭义范围的惰性气体,也包括氮气那样的不与金属反应的广义范围的惰性气体。
但是,考虑到经济成本,在几乎所有的三维造型装置中都利用氮气。
通过这样的惰性气体的供给,能够抑制金属粉末和烟尘一起或者单独地在直到筛选机5为止的输送路径4中的氧化,从而可以进行干净的金属粉末的再利用。
而且,也能够抑制因钛、铝等可燃性金属粉末一下子氧化所导致的粉尘爆炸,从而也可以进行安全状态下的金属粉末的再利用。
为了进行金属粉末和烟尘直到筛选机5为止的输送,必然需要气体流动。
为了引起这样的气体的流动,通常采用产生输送路径4内的压力差的构成、或者产生利用旋转螺旋(螺杆)的流动状态的构成。
在上述基本构成中,作为惰性气体的供给装置8,采用压入惰性气体的压缩机8。
在这样的基本构成中,能够一举实现惰性气体的供给和基于该惰性气体的流动的金属粉末和烟尘的输送。
金属粉末和烟尘在输送路径4内的输送可以不仅通过上述压入,还通过吸引装置9来实现,该吸引装置9通过在烟尘和金属粉末的输送路径4的末端的位置产生该输送所需的负压而与惰性气体的供给装置8协作。
上述吸引在与上述压入协作的情况下,能够实现切实的输送,但通过将吸引的程度设定得大,从而能够不与上述压入协作地独自实现输送。
由筛选机5筛选并收纳于造型箱1内的金属粉末经由进一步的输送路径4而被输送到向涂刮器32供给金属粉末的粉末供给装置7。
在上述基本构成中,如图3所示,设有从粉末箱6向将金属粉末供给到涂刮器32的粉末供给装置7输送的输送路径4,通过连通该输送路径4和上述吸引装置9,能够将从吸引装置9排出的惰性气体的一部分或全部供给到该输送路径4。
通过这样的输送路径4的进一步的设置,能够极为高效地再利用惰性气体。
在上述基本构成中,图3的虚线所示,能够采用将从吸引装置9排出的惰性气体的一部分或全部返回到输送路径4的入口40和/或输送路径4的最高位置的反馈路径41。
此外,图3中示出了与输送路径4的入口40和输送路径4的最高位置这双方相连的反馈路径41的情况,但当然也可以采用仅与它们的一方相连的反馈路径41。
在返回到各输送路径4的入口40的实施方式的情况下,能够实现惰性气体的高效的再利用,在反馈到最高位置的实施方式的情况下,能够高效地抑制由在这样的位置可燃性金属粉末彼此的碰撞所导致的粉尘爆炸。
实施例
以下,按照实施例进行说明。
【实施例1】
在实施例1中,其特征在于,如图1所示,供给到造型箱1内的惰性气体的在该造型箱1的排出口11与各输送路径4的入口40相连通,从而造型箱1与惰性气体的供给装置8相当。
在这样的实施例1中,在回收的金属粉末和烟尘的输送路径4中再利用供给到了腔室2内的惰性气体,从而可进行惰性气体的高效的再利用。
在上述实施例1的情况下,在造型箱1的上侧设置惰性气体的排出口11而在该造型箱1的下侧设置氧的排出口12的情况下,能够高效地分离侵入到造型箱1内的氧,从而对于从造型箱1排出的惰性气体可进行浓度高的惰性气体的再利用。
【实施例2】
在实施例2中,其特征在于,如图2所示,在粉末箱6内配置氧浓度计61,并且设置按照该氧浓度计61的氧浓度来调整对惰性气体的供给量的控制装置62。
在这样的实施例2中,能够根据造型箱1内的氧浓度来调整向各输送路径4供给的惰性气体的浓度的量,从而能够将金属粉末的供给量设为适当的状态。
【实施例3】
在实施例3中,其特征在于,如图3所示,形成各输送路径4的金属管接地。
在这样的实施方式3中,接地的管的电位为零,从而能防止各输送路径4中的金属粉末的带电且能够进一步抑制与带电相伴的金属粉末的氧化,并且,也能够抑制金属粉尘的爆炸导致的事故。
产业上的可利用性
这样,本发明能够以抑制了从造型箱和腔室排出并回收的金属粉末的氧化的状态进行净化了的金属粉末的再利用,所以能够利用于广泛构成的三维造型装置。
Claims (6)
1.一种三维造型装置,该三维造型装置具有在造型箱内上升和下降的造型工作台、通过水平方向移动来散布金属粉末且形成该金属粉末的层积的涂刮器、利用激光束或电子束的照射的烧结装置、以及利用刀具的旋转的切削装置,在该三维造型装置中,
设有输送路径,该输送路径用于将经过所述切削装置的切削后排出到造型箱的外侧的金属粉末和烟尘、以及未达到构成所述层积而排出到处于包围造型箱的状态的腔室的外侧的金属粉末分别输送到位于粉末箱的上侧的筛选机,通过用设置于各输送路径的入口的压缩机对不与金属粉末反应的惰性气体进行压入和/或用设置于各输送路径的末端的吸引装置对所述惰性气体进行吸入,一举实现所述惰性气体的供给、以及所述输送路径中的金属粉末和烟尘的输送,
设有反馈路径,所述反馈路径将从所述吸引装置排出的所述惰性气体的一部分或全部返回到所述输送路径的入口和/或所述输送路径的最高位置,
所述反馈路径与所述输送路径的入口和/或所述输送路径的最高位置连接。
2.如权利要求1所述的三维造型装置,其特征在于,
供从造型箱排出的所述金属粉末和烟尘下落的下落管的下端和供从腔室排出的金属粉末下落的下落管的下端与所述各输送路径相连通。
3.如权利要求1或2所述的三维造型装置,其特征在于,
供给到了造型箱内的惰性气体在该造型箱的排出口与各输送路径的入口相连通,由此造型箱相当于惰性气体的供给装置。
4.如权利要求3所述的三维造型装置,其特征在于,
在造型箱的上侧设置惰性气体的排出口,而在该造型箱的下侧设置氧的排出口。
5.如权利要求1或2所述的三维造型装置,其特征在于,
在粉末箱内设置氧浓度计,并且,设置按照该氧浓度计的氧浓度来调整对惰性气体的供给量的控制装置。
6.如权利要求1或2所述的三维造型装置,其特征在于,
形成各输送路径的管接地。
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