CN109641228B - 工业打印头 - Google Patents

工业打印头 Download PDF

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CN109641228B
CN109641228B CN201780053230.6A CN201780053230A CN109641228B CN 109641228 B CN109641228 B CN 109641228B CN 201780053230 A CN201780053230 A CN 201780053230A CN 109641228 B CN109641228 B CN 109641228B
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fluid
industrial
flow channel
wave concentrator
industrial printhead
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CN109641228A (zh
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艾伦·赫德
阿尔贝特·科奇斯
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Jetronica Ltd
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Jetronica Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/025—Ink jet characterised by the jet generation process generating a continuous ink jet by vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04575—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads of acoustic type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2002/16567—Cleaning of print head nozzles using ultrasonic or vibrating means

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

一种工业打印头(100)，其包括封闭在腔室中的流动通道，其中所述流动通道(102)具有至少一个流体入口(102a)和至少一个流体出口(102b)，其中所述流动通道通过振动分配器(104)在使用中谐振，所述振动分配器包括以轴向构造布置的质量谐振器(103)、压电激振器(108)和波聚集器(110)。

Description

工业打印头
技术领域
本发明涉及工业打印头。
背景技术
已知压电致动的针基于PCT/HU1999/000015中描述的机制可用于流体的沉积。然而，该技术的工业应用要求改进系统的许多操作特性，以确保一致的操作并实现多种应用所需的对于具有高粘度和/或对小或大颜料颗粒有较高固体装载量的流体的印刷。
PCT/HU1999/000015中描述的打印头设计由于其结构小而具有若干限制。这些限制包括：操作功率；以及由于小的散热表面和小的压电元件，使得如果出现过载，可能会发生“去极化(depolarized)”或者机械功能停止。
在本专利申请中描述了一种打印头设计，其克服了先前描述的发明的工业限制，包括以下：主要较大的换能器零件和增加的振动质量，较高的输入功率以及每种部件材料的尺寸和数量已经变型为以增加印刷喷嘴的流速(如图2所示，包括质量谐振器，压电激振器和波聚集器)。
本文描述了工业打印头的构造的发明，该构造克服了PCT/HU1999/000015中描述的构造的限制，以产生一种压电致动流道沉积原理的新颖且工业上可应用的实施方式，其具有性能加强的流体，这种流体具有高粘度和/或对小或大颜料颗粒的高固体装载量。
发明内容
本发明的一方面提供了一种工业打印头，该工业打印头包括封闭在腔室中的流动通道，其中，所述流动通道具有至少一个流体入口和至少一个流体出口，其中所述流动通道通过振动分配器在使用中谐振，所述振动分配器包括以轴向构造布置的质量谐振器、压电激振器和波聚集器。
有利的是，根据本发明上述方面的工业打印头能够分配粘度为100-1000cP的粘性流体以及/或者粒度为20-500微米的具有不同的各向异性(different anisotropy)的粘性流体。
在一个实施例中，所述质量谐振器具有比所述波聚集器更大的质量密度。
有利的是，这种结构通过波聚集器提供了更高的振动幅度。
在一个实施例中，波聚集器是圆锥形的。
圆锥形的波聚集器为流动通道提供聚焦的谐振。
在一个实施例中，至少一个流体出口包括两个或更多个流体出口。在另一个实施例中，两个或更多个流体出口中的每一个所具有的流动方向垂直于流体通道的流动方向。
压电驱动流道沉积器的构造形成可在工业上用作可靠的数字打印头的阵列，这种压电驱动流道沉积器的构造有助于打印具有高粘度和/或对小或大颜料颗粒有高固体承载量的流体。
本发明的一个方面提供了一种工业打印头，该工业打印头包括封闭在腔室中的单个压电致动流动通道分配器。由于打印头的三维形状较大，各个喷嘴不能以低间距堆叠，因此还开发了多喷嘴结构，该多喷嘴结构包括单个振动系统以驱动多个喷射喷嘴。
附图说明
图1示出了现有技术的工业打印头的侧视图；
图2示出了图1的工业打印头的俯视图；
图3示出了与图1的现有技术工业打印头相比的根据本发明的各方面的工业打印头的一个实施例；
图4示出了多孔口喷嘴板设计的三维视图。
具体实施方式
图1和图2示出了申请人开发的现有技术的工业打印头设计。图1和图2中所示的现有技术的工业打印头(10)包括流动通道(12)，流动通道(12)具有流体入口(12a)和流体出口(12b)。振动分配器(14)定位为与流动通道(12)接触。振动分配器包括安装在板谐振器(18)上的压电激振器(16)。在激活压电激振器(16)时，板谐振器振动以使粘性流体能够从流体入口(12a)通过流动通道(12)到达流体出口(12b)。图1和图2中所示的现有技术工业打印头(10)构造成二维形状，以使得各个喷嘴能够以2.54毫米(mm)的紧密间距放置，以通过单独地打开或关闭每个针来实现足够的打印分辨率。
图3中示出了根据本发明的工业打印头(100)的第一实施例。工业打印头(100)包括流动通道(102)，流动通道(102)具有流体入口(102a)和流体出口(102b)。振动分配器(104)定位为与流动通道(102)接触。振动分配器(104)包括轴向对准的质量谐振器(106)、压电激振器(108)和波聚集器(110)，使得压电激振器(108)位于质量谐振器(106)和波聚集器(110)之间。通过使用轴向紧固件(未示出)(如，螺钉)将质量谐振器(106)、压电激振器(108)和波聚集器轴向对准地夹紧在一起。
振动分配器(104)是大致圆柱形的，并且波聚集器(110)形成圆锥形，使得波聚集器(110)的直径及其质量沿着其长度向远离压电激振器(108)的方向减小。质量谐振器(106)由高密度材料制成，例如钢或黄铜。波聚集器(110)也由高密度材料制成，但波聚集器(110)的材料的质量密度低于质量谐振器(106)的质量密度。波聚集器(110)可以由例如钛或铝制成。
图4示出了本发明的第二实施例。图4所示的工业打印头(200)包括流动通道(202)，流动通道(202)具有流体入口(202a)和多个流体出口(202b)。图3中所示的振动分配器(104)定位为与流动通道(202)接触，使得振动分配器(104)可以驱动流体通过多个流体出口(202b)中的每一个。图4中设想的实施例要求多个流体出口(202b)中的每一个都从共同的流体源供应流体。共同的流体源可包括温度调节装置(未示出)，以调节其中所容纳流体的温度。
尽管图4通过参考多个流体出口(202b)中的每一个从共同的流体源供应流体来描述，但是应当理解，多个流体出口(202b)中的每一个也可以从各个独立的流体源供应流体。在这样的实施例中，将需要另外的流体控制元件。

Claims (16)

1.一种工业打印头，其包括封闭在腔室中的流动通道和单个振动分配器，所述振动分配器包括以轴向构造布置的质量谐振器、压电激振器和波聚集器，其中，所述流动通道通过所述振动分配器在使用中谐振；其特征在于：所述流动通道具有至少一个流体入口和两个或更多个流体出口，并且，其中所述波聚集器的形状为圆锥形，使得所述波聚集器的直径及其质量沿着其长度向远离所述压电激振器的方向减小。
2.根据权利要求1所述的工业打印头，其中，所述两个或更多个流体出口中的每一个所具有的流动方向垂直于所述流动通道的流动方向。
3.根据权利要求1或2所述的工业打印头，其中，所述质量谐振器具有比所述波聚集器更大的质量密度。
4.根据权利要求1或2所述的工业打印头，其中，所述振动分配器具有大致圆柱形的横截面。
5.根据权利要求1或2所述的工业打印头，其中，所述质量谐振器由诸如钢或黄铜的高密度材料形成。
6.根据权利要求1或2所述的工业打印头，其中，所述波聚集器由密度低于钢或黄铜的高密度材料制成，这种高密度材料包括铝或钛。
7.根据权利要求1或2所述的工业打印头，其中，所述振动分配器连接到所述流动通道。
8.根据权利要求1或2所述的工业打印头，其中，所述质量谐振器、所述压电激振器和所述波聚集器使用轴向紧固件轴向地夹紧在一起。
9.根据权利要求1或2所述的工业打印头，其中，所述流动通道构造为接收粘度在20-1000cP之间的流体。
10.根据权利要求1或2所述的工业打印头，其中，所述流动通道构造成接收具有1微米至500微米的颜料尺寸范围的流体，并且/或者接收具有不同的各向异性颗粒的流体。
11.根据权利要求1或2所述的工业打印头，其中，所述两个或更多个流体出口中的每一个与相邻的流体出口间隔开2.54毫米。
12.根据权利要求1或2所述的工业打印头，其中，所述两个或更多个流体出口中的每一个的流体由共同的流体源供应。
13.根据权利要求1或2所述的工业打印头，其中，所述两个或更多个流体出口中的每一个的流体由独立的流体源供应。
14.根据权利要求12所述的工业打印头，其中，所述流体源或每个流体源设有加热装置，以加热容纳在其中的流体。
15.根据权利要求13所述的工业打印头，其中，所述流体源或每个流体源设有加热装置，以加热容纳在其中的流体。
16.根据权利要求1或2所述的工业打印头，其中所述波聚集器具有比所述质量谐振器低的质量密度。
CN201780053230.6A 2016-08-30 2017-08-29 工业打印头 Active CN109641228B (zh)

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GB1614637.5A GB2553300A (en) 2016-08-30 2016-08-30 Industrial printhead
GB1614637.5 2016-08-30
PCT/GB2017/052516 WO2018042165A1 (en) 2016-08-30 2017-08-29 Industrial printhead

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BR (1) BR112019003922B1 (zh)
DK (1) DK3507024T3 (zh)
ES (1) ES2835123T3 (zh)
GB (1) GB2553300A (zh)
HU (1) HUE053151T2 (zh)
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GB201614637D0 (en) 2016-10-12
EP3507024A1 (en) 2019-07-10
US11479035B2 (en) 2022-10-25
CN109641228A (zh) 2019-04-16
BR112019003922A2 (pt) 2019-05-21
WO2018042165A1 (en) 2018-03-08
EP3507024B1 (en) 2020-11-11
ES2835123T3 (es) 2021-06-21
BR112019003922B1 (pt) 2022-08-16
DK3507024T3 (da) 2020-12-07
PT3507024T (pt) 2020-12-04
HUE053151T2 (hu) 2021-06-28
GB2553300A (en) 2018-03-07
US20210300017A1 (en) 2021-09-30

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