CN106476276B - Micro-droplet jetting device and ink-jet printing device - Google Patents
Micro-droplet jetting device and ink-jet printing device Download PDFInfo
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- CN106476276B CN106476276B CN201611018211.3A CN201611018211A CN106476276B CN 106476276 B CN106476276 B CN 106476276B CN 201611018211 A CN201611018211 A CN 201611018211A CN 106476276 B CN106476276 B CN 106476276B
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- 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
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Abstract
The invention provides a micro-droplet spraying device suitable for spraying high-viscosity liquid materials, which comprises a substrate, wherein at least two spraying ports are arranged on the substrate; the material storage element is used for storing the material to be sprayed, and a plurality of discharge holes corresponding to the piezoelectric tubes are formed in the bottom of the material storage element; the elastic film is connected with the material storage element through an adhesive, and the elastic film is connected with the piezoelectric element through an adhesive; and a piezoelectric element on which at least two piezoelectric tubes arranged at a set interval are disposed, hollow portions of the piezoelectric tubes each corresponding to the ejection port, so that the material to be ejected is ejected from the ejection port by pressurizing the piezoelectric tube.
Description
Technical Field
The present invention relates to a micro-droplet jetting apparatus suitable for jetting a liquid material, particularly for jetting a material having a high viscosity, and an inkjet printing apparatus using the same.
Background
With the development of technologies in the field of printers, more and more research is focused on 3D printers for implementing 3D printing technologies. The printing material used for 3D printing is typically a bondable material such as powdered metal or plastic to print. Among them, in the case of using a material such as plastic, the plastic material used tends to have a high viscosity, which puts new demands on a micro-droplet jetting apparatus (head) used for a 3D printer. The common micro-droplet ejection device mainly has two driving modes of thermal foaming and micro-piezoelectric type.
The thermal foaming technology is to make liquid generate bubbles by heating a nozzle and spray the bubbles onto a printing medium, and belongs to the high-temperature and high-pressure printing technology. However, since this technique requires generation of bubbles, generation of bubbles may be difficult for a material having high viscosity despite heating. Therefore, this technique is disadvantageous when the material to be sprayed has a high viscosity.
The micro-piezoelectric jetting technology belongs to the normal temperature and pressure printing technology, and is characterized by that several small piezoelectric ceramics are placed near the nozzle of printing head, and under the action of voltage change at two ends of the piezoelectric ceramics, the piezoelectric ceramics have the characteristic of bending deformation, and when the image information voltage is applied to the piezoelectric ceramics, the stretching vibration deformation of the piezoelectric ceramics can be changed along with the change of image information voltage, and the liquid in the jetted stored liquid can be uniformly and accurately jetted out liquid drop under the stable state of normal temperature and pressure. However, when a piezoelectric tube is used as the above-mentioned piezoelectric ceramic, a glass tube is often provided inside the piezoelectric tube in the prior art to prevent direct contact of the material with the inner surface of the piezoelectric tube, and in this case, particularly for a material having high viscosity, the pressure applied to the material by the piezoelectric tube tends to be insufficient due to the obstruction of the glass tube, thereby lowering the operation accuracy.
Obviously, due to the problems in the prior art described above, there is much room for improvement in a micro-droplet ejection apparatus for a 3D printer.
Therefore, a micro-droplet jetting apparatus suitable for jetting a material having a high viscosity and high in operation accuracy has been desired.
Disclosure of Invention
Problems to be solved by the invention
Based on the above description, an object of the present invention is to provide a micro-droplet jetting apparatus suitable for jetting a material having a high viscosity and having an advantage of high operation accuracy. In the present invention, "high viscosity" means that the viscosity measured by a rotational viscometer is in the range of 5000 to 20000 mpa.s.
Means for solving the problems
Through diligent efforts of the present inventors, the present inventors have found that the following technical solutions can solve the above technical problems. The present invention provides a micro-droplet jetting apparatus, comprising:
a substrate on which at least two ejection ports are provided;
the material storage element is used for storing the material to be sprayed, and a plurality of discharge holes corresponding to the piezoelectric tubes are formed in the bottom of the material storage element;
a piezoelectric element on which at least two piezoelectric tubes arranged at a set interval are disposed, hollow portions of the piezoelectric tubes each corresponding to the ejection port, so that a material to be ejected is ejected from the ejection port by pressurizing the piezoelectric tube;
wherein the substrate is connected with the storage element through an adhesive, the storage element is connected with the elastic film through the adhesive, and the elastic film is connected with the piezoelectric element through the adhesive.
In the above droplet ejection apparatus, the piezoelectric tube includes, in order from the center to the outside, a first electrode, at least one piezoelectric ceramic layer, and a second electrode.
In the above-mentioned micro droplet jetting apparatus, the piezoelectric tube further includes a protective layer, and the protective layer is disposed on an innermost side of a center of the piezoelectric tube.
In the above droplet discharge apparatus, the piezoelectric ceramic layer is made of PZT.
In the above-described micro-droplet jetting apparatus, the protective layer is made of parylene.
In the above-mentioned micro-droplet jetting apparatus, the cross section of the jetting orifice is trapezoidal, and the storage element is provided with the heating element.
In the above-described micro-droplet jetting apparatus, the substrate is made of one of metal, resin, and ceramic.
In the above-described micro droplet jetting apparatus, the plurality of piezoelectric tubes may be individually controlled, or may be controlled in combination of two or more.
The micro-droplet jetting device further comprises a temperature control element, wherein the temperature control element is a cooling water circulation system, and the cooling water circulation system covers the periphery of the piezoelectric element.
Another object of the present invention is to provide an ink jet printer which can perform printing operation using a micro-droplet jetting apparatus capable of jetting a highly viscous material with high printing accuracy.
The invention provides an ink-jet printing device for achieving the aim, which comprises the micro-droplet jetting device.
ADVANTAGEOUS EFFECTS OF INVENTION
The invention provides a micro-droplet jetting device which is suitable for jetting materials with high viscosity and has the advantage of high operation precision. According to the above constitution of the present invention, it can be seen that the micro droplet spray device of the present invention can be widely used for spraying single component or multi component materials. In addition, since the inside of the piezoelectric tube of the present invention is covered with only parylene, pressure can be more easily applied to the material inside according to an electrical signal, and thus, the micro droplet jetting apparatus of the present invention is particularly suitable for jetting a material having high viscosity.
Drawings
Fig. 1 is a schematic cross-sectional view of a micro-droplet jetting apparatus according to one embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a piezoelectric tube according to an embodiment of the present invention.
Detailed Description
One embodiment of the present invention is described in detail below, however, the present invention is not limited thereto.
Fig. 1 is a schematic cross-sectional view of a micro-droplet jetting apparatus according to one embodiment of the present invention. As shown in fig. 1, the micro droplet jetting apparatus of the present invention includes: a substrate 1, a piezoelectric element 2 and a storage element 3. A plurality of ejection ports having a trapezoidal cross section are provided on the substrate 1. The piezoelectric element 2 is constituted by a plurality of piezoelectric tubes arrayed at equal intervals, and hollow portions of the plurality of piezoelectric tubes each correspond to a plurality of ejection ports on the substrate 1. An elastic film is arranged on the storage element 3, the piezoelectric element 2 is arranged on the elastic film, the elastic film in the invention is a metal foil, and in the operation process of the micro-droplet jetting device, the piezoelectric tube shrinks from the outer peripheral surface to the center thereof through responding to an electric signal, so that pressure is applied to the hollow part of the piezoelectric tube, and the material to be jetted which is already in the hollow part can be jetted out from the jetting port on the substrate 1. A plurality of discharge ports corresponding to the piezoelectric tubes are provided on the bottom of the storage member 3 for storing the material to be ejected, thereby supplying the material to the piezoelectric tubes.
The substrate 1, the piezoelectric element 2, and the reservoir element 3 of the present invention are connected to each other by using an adhesive such as an epoxy adhesive.
Hereinafter, each part of the micro droplet jetting apparatus according to one embodiment of the present invention is described in detail.
1. Substrate
As described above, the substrate of the present invention is provided with a plurality of ejection ports having a trapezoidal cross section. In the present invention, there is no particular limitation on the size of the ejection orifice, and the specific size of the ejection orifice may vary depending on the actual use, but the diameter of the widest part of the ejection orifice is preferably 100 to 200 μm.
Examples of the material for forming the substrate include: metals such as aluminum, copper, stainless steel, etc.; resins such as polyimide, polyethylene terephthalate, polycarbonate, and the like; or a ceramic. Among them, from the viewpoint of easy molding and basic stability, a metal or a resin is preferable, and polyimide is particularly preferable.
2. Piezoelectric element
As described above, the piezoelectric element of the present invention is constituted by a plurality of piezoelectric tubes arrayed at equal intervals. The piezoelectric tubes can be controlled individually through different wire connection modes or controlled in a combination of more than two. When the piezoelectric tubes are controlled individually or in groups, the micro-droplet jetting apparatus of the present invention can jet different kinds of materials according to actual use, for example, two components of AB glue. However, the order of spraying the different kinds of materials is not particularly limited.
Fig. 2 is a schematic cross-sectional view of a piezoelectric tube according to an embodiment of the present invention. As shown in fig. 2, the piezoelectric tube constituting the piezoelectric element of the present invention includes a protective layer, a first electrode, at least one piezoelectric ceramic layer, and a second electrode in this order from the center to the outside. The piezoelectric element of the micro-droplet jetting apparatus of the present invention includes two, three, four or more piezoelectric ceramic layers to achieve a relatively large displacement with a relatively low voltage output, thereby being suitable for printing of high-viscosity materials.
The protective layer has heat insulation and corrosion prevention functions and is arranged for heating the material to be sprayed or causing adverse effects on the first electrode by the material to be sprayed. The protective layer is composed of parylene. Examples of the parylene include N-type, C-type, D-type, H-type and T-type. Among them, the forms C and D are preferable from the viewpoint of permeability of parylene.
In addition, the material of the piezoelectric ceramic layer used for the piezoelectric tube of the present invention is PZT. In a practical process, a through hole may be formed by digging a hole in the piezoelectric ceramic layer of the piezoelectric tube using a laser for introducing a lead wire. Even when the piezoelectric ceramic layer has such through-holes, short-circuiting between the first electrode and the second electrode does not occur.
The piezoelectric tube of the present invention may have a height of 1 to 3mm, an inner diameter of 0.3 to 1.0mm, and an outer diameter of 0.8 to 1.2 mm.
3. Material storage element
The magazine element of the present invention is an element for storing the material to be ejected. When the micro-droplet jetting apparatus of the present invention is used to jet different kinds of materials, the storage component of the present invention may be partitioned into a plurality of different cells for storing different kinds of materials. Set up heating element on the storage component for heat the material when cold weather or spraying high viscosity material in order to guarantee that the material is in the fluid state.
And a plurality of discharge holes corresponding to the piezoelectric tubes are formed in the bottom of the material storage element. The shape and size of the discharge port are not particularly limited and may be changed according to the kind of material to be ejected and the size of the piezoelectric tube.
In another embodiment of the present invention, the micro-droplet jetting apparatus of the present invention may further include a temperature control element in addition to the substrate, the piezoelectric element, and the reservoir element as described above. The temperature control element can keep the material to be sprayed at a specific temperature depending on the actual application, which is advantageous for materials with a high viscosity. The temperature control element in the invention is a cooling water circulation system, the piezoelectric element is wrapped by waterproof materials and then soaked in the cooling water circulation system, and the flow of water is controlled by a circulating water pump, so that the work of the multilayer piezoelectric ceramic is not influenced by the high temperature of the storage element.
The micro-droplet jetting device is particularly suitable for jetting materials with high viscosity, and therefore is particularly suitable for being used as a jetting head of a 3D printer, and is also suitable for other technical fields such as adhesive coating and the like which need to jet materials with high viscosity.
While the present invention has been particularly described with reference to the above embodiments, it is to be understood that the scope of the invention is not limited to the disclosed embodiments. Modifications may be made to the embodiments of the invention without departing from the spirit thereof.
Claims (7)
1. A micro-droplet ejection device, comprising:
a substrate on which at least two ejection ports are provided;
the material storage element is used for storing materials to be sprayed, and a plurality of discharge holes corresponding to the piezoelectric tubes are formed in the bottom of the material storage element;
the elastic film is connected with the material storage element through an adhesive, and the elastic film is connected with the piezoelectric element through an adhesive;
a piezoelectric element on which at least two piezoelectric tubes arranged at a set interval are disposed, hollow portions of the piezoelectric tubes each corresponding to the ejection port, so that a material to be ejected is ejected from the ejection port by pressurizing the piezoelectric tube; the piezoelectric tube comprises a first electrode, at least one piezoelectric ceramic layer and a second electrode in sequence from the center to the outer side, the piezoelectric tube further comprises a protective layer, the protective layer is arranged on the innermost side of the center of the piezoelectric tube, and the protective layer is composed of parylene.
2. The micro-droplet ejection device of claim 1, wherein the piezoelectric ceramic layer is PZT.
3. The micro-droplet ejection device of claim 1, wherein the ejection opening has a trapezoidal cross section, and the reservoir member is provided with a heating element.
4. The micro-droplet ejection apparatus of claim 1, wherein the substrate is made of one of metal, resin, and ceramic.
5. The micro-droplet jetting apparatus according to any one of claims 1 to 4, wherein the plurality of piezoelectric tubes are individually controllable, or controllable in combination of two or more.
6. The micro-droplet ejection device according to any one of claims 1-4, further comprising a temperature control element, wherein the temperature control element is a cooling water circulation system, and the cooling water circulation system covers the periphery of the piezoelectric element.
7. An ink jet printing apparatus comprising the micro-droplet jetting apparatus according to any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611018211.3A CN106476276B (en) | 2016-11-20 | 2016-11-20 | Micro-droplet jetting device and ink-jet printing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611018211.3A CN106476276B (en) | 2016-11-20 | 2016-11-20 | Micro-droplet jetting device and ink-jet printing device |
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| CN106476276A CN106476276A (en) | 2017-03-08 |
| CN106476276B true CN106476276B (en) | 2020-06-30 |
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| CN110962344A (en) * | 2019-12-23 | 2020-04-07 | 北京工业大学 | Array type micro-droplet generating device based on pneumatic and electrohydrodynamic hybrid driving |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403281A (en) * | 2001-09-05 | 2003-03-19 | 飞赫科技股份有限公司 | Ink jet for piezoelectric ink jetting head and its making process |
| WO2006070557A1 (en) * | 2004-12-28 | 2006-07-06 | Konica Minolta Holdings, Inc. | Liquid ejection head, liquid ejector and liquid ejecting method |
| CN101037044A (en) * | 2006-03-17 | 2007-09-19 | 精工爱普生株式会社 | Droplet discharging head and droplet discharging apparatus |
| CN103434272A (en) * | 2013-08-23 | 2013-12-11 | 浙江大学 | Piezoelectric type jet nozzle device for micro-droplet generation |
| CN105129769A (en) * | 2015-08-25 | 2015-12-09 | 西北工业大学 | Microdroplet spray device, and method for preparing CNTs film by deposition through microdroplet spray device |
-
2016
- 2016-11-20 CN CN201611018211.3A patent/CN106476276B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403281A (en) * | 2001-09-05 | 2003-03-19 | 飞赫科技股份有限公司 | Ink jet for piezoelectric ink jetting head and its making process |
| WO2006070557A1 (en) * | 2004-12-28 | 2006-07-06 | Konica Minolta Holdings, Inc. | Liquid ejection head, liquid ejector and liquid ejecting method |
| CN101037044A (en) * | 2006-03-17 | 2007-09-19 | 精工爱普生株式会社 | Droplet discharging head and droplet discharging apparatus |
| CN103434272A (en) * | 2013-08-23 | 2013-12-11 | 浙江大学 | Piezoelectric type jet nozzle device for micro-droplet generation |
| CN105129769A (en) * | 2015-08-25 | 2015-12-09 | 西北工业大学 | Microdroplet spray device, and method for preparing CNTs film by deposition through microdroplet spray device |
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Effective date of registration: 20210201 Address after: 1 / F 162, building 1, yard 35, Huilongguan West Street, Changping District, Beijing Patentee after: Beijing Taiwei Huaying Technology Co.,Ltd. Address before: 101300 room 1807, 30 Longxiang Road, Haidian District, Beijing Patentee before: BEIJING AORUN LIANCHUANG MICROELECTRONIC TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Effective date of registration: 20210719 Address after: 271000 No.123 Keji North Street, Eastern New District, Tai'an City, Shandong Province Patentee after: Shandong Zhongkang Jihong Technology Development Co.,Ltd. Address before: 1 / F 162, building 1, yard 35, Huilongguan West Street, Changping District, Beijing Patentee before: Beijing Taiwei Huaying Technology Co.,Ltd. |