A flat printing ink supply structure, ink extrusion structure and flat printing equipment

Abstract

The present invention discloses a planar printing ink supply structure, an ink extrusion structure and a planar printing device, and relates to the field of planar printing technology. The planar printing ink supply structure includes: an ink supply working surface; an ink storage cavity with a variable volume, which is provided on one side of the ink supply working surface, and its ink supply port is exposed on the surface of the other side of the ink supply working surface; a driving component, which controls the volume change of the ink storage cavity and extrude the ink from the ink storage cavity to the surface of the other side of the ink supply working surface; a brushing component, which is provided on the other side of the ink supply working surface and obtains the extruded ink by contacting with the surface of the ink supply working surface and generating relative movement. In the embodiment of the present invention, the ink supply structure is designed to be an extrusion structure on a plane to avoid problems such as phase separation and leakage of inks with high viscosity and easy phase separation. In addition, the ink supply structure has a simple structure, is easy to process and implement, and is also easy to clean the ink supply surface.

Description

Technical Field

[0001] The present invention belongs to the technical field of planar printing, and in particular relates to a planar printing ink supply structure, an ink extrusion structure and a planar printing device. Background Art

[0002] Printed electronics is an emerging process technology that applies traditional printing (or coating) technology to the manufacture of electronic components and products. Electronic paste is one of the basic materials in the printed electronics industry. Among them, conductive paste mainly includes silver paste, aluminum paste, gold paste, copper paste, etc., which are widely used in many fields such as the front and back electrodes of solar panels, RFID electronic tags, mobile phone antennas, contactless IC card antenna circuits, etc. However, the melting points of the metal components of the above-mentioned conductive pastes are relatively high. After sintering, the conductive phase is still in particle contact, so the contact resistance is relatively large. Low-melting-point elemental metals or alloys have low melting points, high conductivity, are liquid at room temperature, and have good fluidity. Conductive inks made from low-melting-point metals can replace electronic pastes and are widely used in the printed electronics industry.

[0003] Low-melting-point metals have extremely strong fluidity and surface tension in liquid state, which cannot meet the requirements of adhesion to the printing roller well. Therefore, conductive particles are generally added to the low-melting-point metal to modify the low-melting-point metal into a more viscous slurry to reduce its fluidity and surface tension and increase the adhesion effect. Traditional inking structures generally use an ink fountain in conjunction with a roller-to-roller ink transfer and ink distribution structure to achieve uniform ink application. However, for the modified low-melting-point metal ink mentioned above, setting the gap pressure is a relatively serious problem. If the gap pressure is set too high, the low-melting-point metal and the added conductive particles in the low-melting-point metal ink are very likely to separate into phases, resulting in the failure of the previous modification effect, and a large amount of conductive particles will accumulate in the gap. If the gap pressure is set too low, it will cause ink to leak from the gap and the ink distribution effect to be poor. In other words, the ink supply structure in the existing technology is extremely difficult to meet the requirements of stable inking of low-melting-point metal inks. Summary of the Invention

[0004] In view of this, one object of the present invention is to propose a planar printing ink supply structure to solve the problem that the ink supply structure in the prior art cannot meet the good inking requirements of high-viscosity and easily phase-separated inks.

[0005] In some illustrative embodiments, the planar printing ink supply structure includes: an ink supply working surface; a variable-volume ink storage chamber, disposed on one side of the ink supply working surface, with its ink supply port exposed on the surface of the other side of the ink supply working surface; a driving component, controlling the volume change of the ink storage chamber to extrude ink from the ink storage chamber to the surface of the other side of the ink supply working surface; and a brushing component, disposed on the other side of the ink supply working surface, for obtaining the extruded ink by contacting the surface of the ink supply working surface and generating relative movement.

[0006] In some optional embodiments, there are multiple ink supply ports, which are distributed at intervals on the ink supply working surface.

[0007] In some optional embodiments, the brushing component is a roller structure; multiple ink supply ports are evenly spaced on the ink supply working surface; during the relative movement between the brushing component and the ink supply working surface, each ink supply port contacts a different area of ​​the brushing component.

[0008] In some optional embodiments, there are multiple ink storage chambers, and each ink storage chamber has at least one ink supply port; the driving component can control the ink extrusion amount of each ink storage chamber separately, or control the ink storage chambers to maintain an equal ink extrusion amount at the same time.

[0009] In some optional embodiments, the driving component includes: a power source and an extrusion component connected to the power source, and the extrusion component acts on each ink storage cavity with an equal external force under the drive of the power source, thereby controlling the ink storage cavity to maintain an equal amount of ink extrusion at the same time.

[0010] In some optional embodiments, the power source is a motor, a hydraulic mechanism or a pneumatic mechanism.

[0011] In some optional embodiments, the ink storage chamber is a piston chamber structure or a flexible chamber structure controlled by the driving component.

[0012] In some optional embodiments, the planar printing ink supply structure further includes: an ink supply workbench; the ink supply workbench has the ink supply working surface; the ink storage chamber is arranged inside the ink supply workbench, and the driving component is assembled on the ink supply workbench.

[0013] In an embodiment of the present invention, a planar printing ink supply structure is provided, which squeezes the ink in the ink storage chamber onto the ink supply working surface by a driving component, and then takes away the squeezed ink by moving the brush component on the ink supply working surface. Compared with the ink supply structure of a traditional ink fountain, the squeezed ink is always on the surface of the ink supply workbench, and there is no need to consider the phase separation and leakage problems of the ink. In addition, the ink supply structure is simple, easy to implement and easy to clean.

[0014] Another object of the present invention is to provide an ink extrusion structure to solve the technical problems existing in the prior art.

[0015] In some illustrative embodiments, the ink extrusion structure includes: an ink supply working surface; a variable-volume ink storage cavity, disposed on one side of the ink supply working surface, with its ink supply port exposed on the surface on the other side of the ink supply working surface; and a driving component, controlling the volume change of the ink storage cavity to extrude ink from the ink storage cavity to the surface on the other side of the ink supply working surface.

[0016] Another object of the present invention is to provide a planar printing device to solve the technical problems existing in the prior art.

[0017] In some illustrative embodiments, the planar printing device includes any one of the planar printing ink supply structures or the ink extrusion structures described above.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] In the embodiment of the present invention, the ink supply structure is designed to be extruded on a plane to avoid problems such as phase separation and leakage of high-viscosity, easily phase-separated inks. In addition, the ink supply structure has a simple structure, is easy to process and implement, and the ink supply surface is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a side sectional view of Example 1 of a planar printing ink supply structure in an embodiment of the present invention;

[0021] Figure 2 is a top view of Example 1 of a planar printing ink supply structure in an embodiment of the present invention;

[0022] Figure 3 1 is a structural diagram of Example 2 of a planar printing ink supply structure in an embodiment of the present invention;

[0023] Figure 4 1 is a schematic structural diagram of Example 3 of a planar printing ink supply structure in an embodiment of the present invention;

[0024] Figure 51 is a structural diagram of Example 4 of the planar printing ink supply structure in an embodiment of the present invention;

[0025] Figure 6 1 is a structural diagram of Example 5 of the planar printing ink supply structure in an embodiment of the present invention;

[0026] Figure 7 is a side sectional view of Example 6 of the planar printing ink supply structure in an embodiment of the present invention;

[0027] Figure 8 It is a three-dimensional diagram of Example 6 of the planar printing ink supply structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following description and the accompanying drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process and other changes. The examples represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The scope of the embodiments of the invention includes the entire scope of the claims, and all available equivalents of the claims. In this article, these embodiments of the invention may be referred to individually or collectively by the term "invention", which is merely for convenience and is not intended to automatically limit the scope of the application to any single invention or inventive concept if more than one invention is in fact disclosed.

[0029] It should be noted that the various technical features in the embodiments of the present invention can be combined with each other without conflict.

[0030] The embodiment of the present invention discloses a planar printing ink supply structure, such as Figure 1 and Figure 2 As shown, Figure 1 It is a schematic side view of the structure of the planar printing ink supply structure in an embodiment of the present invention; Figure 2The figure is a schematic top view of the structure of a planar printing ink supply structure in an embodiment of the present invention. The planar printing ink supply structure includes: an ink supply working surface 10, an ink storage chamber 20, a driving component 30, and a brushing component 40. The ink storage chamber 20 is used to store ink 50. It is a variable-volume structure and is located on one side of the ink supply working surface 10. Its ink supply port 21 is exposed on the surface on the other side of the ink supply working surface 10, so that the ink 50 flowing out through the ink supply port 21 of the ink storage chamber 20 can reach the surface on the other side of the ink supply working surface 10. The driving component 30 forms a cooperative relationship with the ink storage chamber 20. By controlling the volume change of the ink storage chamber 20, the ink storage chamber 20 is squeezed, and its cavity structure is compressed, so that the ink 50 is squeezed out of the ink storage chamber 20 and onto the surface of the ink supply working surface 10. The brushing component 40 is provided on the other side of the ink supply working surface 10 . When the inking process is required, the brushing component 40 contacts the surface of the ink supply working surface 10 and moves relative thereto to obtain the ink 50 squeezed out from the ink supply working surface 10 .

[0031] In the embodiment of the present invention, the ink supply structure is designed to be extruded on a plane to avoid problems such as phase separation and leakage of high-viscosity, easily phase-separated inks. In addition, the ink supply structure has a simple structure, is easy to process and implement, and the ink supply surface is easy to clean.

[0032] The ink supply working surface 10 in the embodiment of the present invention is an overall rigid structure, and can be constructed from a rigid material, or it can be composited with an elastic layer on its surface to facilitate contact and inking with the brushing component 40. Specifically, when the ink supply working surface 10 contacts the brushing component 40, the brushing component 40 can achieve sufficient contact with the ink 50 by applying appropriate force, thereby removing the ink 50 from the ink supply working surface 10. Furthermore, the brushing component 40 can be made of a surface material that easily adheres to the ink 50, while the ink supply working surface 10 can be made of a surface material that does not adhere to the ink 50, or has poor adhesion to the ink 50, to further ensure that the ink 50 is separated from the ink supply working surface 10 and adheres to the brushing component 40.

[0033] The materials involved in this embodiment that adhere to or do not adhere to the ink can be selected based on the specific surface properties of the ink 50 used. For example, for a low-melting-point metallic ink mixed with metal particles, the surface of the ink supply surface 10 can be made of stainless steel, polytetrafluoroethylene, polished glass, etc., and the coating component 40 can be made of nitrile rubber, polyurethane, etc. It should be understood by those skilled in the art that many other surface materials that can meet the above requirements exist in the prior art, and the present invention is not limited thereto.

[0034] The brushing component 40 in the embodiment of the present invention can be selected from Figure 1 The roller structure shown, Figure 3The brush structure shown in the figure can be a roller with a smooth surface or an anilox roller with a specific texture. In addition, the brush coating component 40 of the roller structure can be a single roller structure, such as an ink supply roller, a coating roller, an inking roller, etc. Preferably, the brush coating component 40 can directly use only one coating roller. After the inking is completed, the coating roller can directly print on the printing substrate without the need for ink transfer and ink distribution processes in the middle. There is no need to add other functional rollers, such as ink distribution rollers, ink diversion rollers, ink transfer rollers, etc., which simplifies the complexity of the equipment structure, reduces equipment costs, and avoids the unsuitability of the roller-to-roller structure for high-viscosity and easily phase-separated inks.

[0035] The variable volume structure of the ink storage chamber 20 in the embodiment of the present invention can be a flexible chamber structure or a piston chamber structure. For example, the flexible chamber structure may be an ink bag structure, which stores ink 50 and deforms under external force, thereby causing the ink 50 to be expelled from the ink supply port 21. A piston chamber structure is a dynamic chamber whose cavity wall is partially formed by a piston member. When the piston moves into the cavity, the volume of the cavity decreases, causing the ink 50 to be expelled from the ink supply port 21.

[0036] like Figure 4 As shown, the driving component 30 in the embodiment of the present invention mainly controls the volume change of the ink storage chamber 20 through mechanical action, such as the extrusion action of motor drive, hydraulic drive, and air pressure drive. The extrusion of the ink storage chamber 20 can apply horizontal and / or vertical extrusion force to the ink storage chamber 20 through the corresponding linkage structure; in addition, the driving component 30 can also apply extrusion force in any other direction to the ink storage chamber 20 through other structures, and there is no specific limitation on this. Preferably, the driving component 30 in the embodiment of the present invention includes: a power source 31 and an extrusion component 32 (such as a piston body) connected to the power source 31. The power source 31 can be the above-mentioned motor displacement drive mechanism, or a hydraulic drive mechanism, and an air pressure control mechanism. The power source 31 directly acts on the extrusion component 32, and the extrusion component 32 then acts on the ink storage chamber 20. In the case where the ink storage chamber 20 adopts a piston cavity structure, the extrusion component 32 can be the piston body constituting the cavity. Among them, Figure 4 , a diagram of the power source 31 consisting of an air pressure control mechanism (such as an air pump) is shown.

[0037] Optionally, in the embodiment of the present invention, the number of ink supply ports 21 located on the surface of the ink supply working surface 10 is multiple, and the intervals are respectively on the surface of the ink supply working surface 10; wherein, when the brush component 40 adopts a roller structure (such as a coating roller), the working surface 10 between each ink supply port 21 is in contact with the coating roller with a certain pressure, which can meet the ink uniformity on the coating roller. Further, the multiple ink supply ports 21 in this embodiment can be distributed on the surface of the ink supply working surface 10 at equal intervals, so that during the relative movement of the brush component 40 and the ink supply working surface 10, each ink supply port 21 contacts different areas of the brush component 40, avoiding a large amount of ink adhering to the same area, and ensuring the ink uniformity effect of the ink supply working surface 10 on the ink on the coating roller. wherein, each ink supply port 21 is a hole arrangement structure along the axial direction of the coating roller; further, the hole arrangement structure can also be a hole arrangement structure with a porous structure, so that the ink and the coating roller are inked as much as possible through multi-point distribution to ensure the uniformity of the ink application.

[0038] Furthermore, when a coating roller is selected as the brush component 40, the length of the ink supply working surface 10 can be consistent with the length of the circumference of the coating roller, and the ink supply port 21 is evenly distributed along the moving direction of the coating roller on the ink supply working surface 10, so that the coating roller can achieve the inking and ink distribution effect of the coating roller with just one movement on the ink supply working surface 10.

[0039] Alternatively, as Figure 5 As shown, in the case where there are multiple ink supply ports 21 on the ink supply working surface 10, there are also multiple ink storage chambers 20, each of which has at least one ink supply port 21; the driving component 30 can control the amount of ink extruded from each ink storage chamber 20 individually, or control the ink storage chambers 20 to maintain an equal amount of ink extruded at the same time. Specifically, the driving component 30 can control the amount of ink extruded from each ink storage chamber 20 individually by using an independent driving structure for each ink storage chamber 20 to achieve separate control of the amount of ink extruded from each ink storage chamber 20. Alternatively, this embodiment can simultaneously control the amount of ink extruded from each ink storage chamber 20 to achieve an equal amount of ink extruded from each ink storage chamber 20 at the same time. Figure 5 The power source 31 shown in FIG. 3 may be a hydraulic control mechanism (eg, a hydraulic pump).

[0040] like Figure 6As shown, in other embodiments, in order to control the ink storage chamber 20 to maintain a uniform amount of ink extruded at the same time by the driving component 30, the driving component 30 may be configured as a structure in which multiple extrusion components 32 are simultaneously driven by a single power source 31 (e.g., via a linkage 33). That is, the multiple extrusion components 32 are linked together to ensure that each extrusion component 32, driven by the power source 31, exerts a uniform external force on each ink storage chamber, thereby controlling the ink storage chambers to maintain a uniform amount of ink extruded at the same time. In this embodiment, the power source 31 may be a drive motor.

[0041] Optionally, the end of the ink storage chamber 20 near the ink supply port 21 in the embodiment of the present invention is a constricted structure for guiding the ink in a convergent manner.

[0042] Preferably, if Figure 7 and Figure 8 As shown, the planar printing ink supply structure in the embodiment of the present invention may further include: an ink supply table 100; the ink supply table 100 has an ink supply working surface 10; an ink storage chamber 20 is provided inside the ink supply table 100, and a driving component 30 is assembled on the ink supply table 100. Specifically, the ink supply table 100 is a horizontally placed structure, and its upper surface serves as the ink supply working surface 10. The ink supply table 100 has a plurality of through holes 101 in the vertical direction. A piston body (such as the above-mentioned extrusion component 32) is assembled at the lower part of each through hole 101, and the lower part of the through hole 101 is sealed by the piston body. The upper end of the through hole serves as the ink supply port 21 exposed on the ink supply working surface 10. That is, the through hole of the ink supply table, the piston body and the ink supply port 21 constitute an ink storage chamber 20; the driving motor (such as the above-mentioned power source 31) is assembled below the ink supply table 100 and is connected to each piston body through a linkage mechanism (such as the above-mentioned linkage member 33) to achieve unified control. Furthermore, a sealing ring is provided at the fitting position between the piston body and the through hole 101 to further ensure the sealing effect of the ink.

[0043] The planar printing ink supply structure of the present invention can be used with high-viscosity, easily phase-separated inks, but is not limited to such inks and can also be used with low-viscosity inks. Furthermore, when using high-viscosity inks, the ink flowability is poor. The ink supply surface 10 can be tilted depending on the specific flowability of the ink. For extremely high viscosity inks, the ink supply surface 10 can even be positioned vertically or horizontally inverted.

[0044] In an embodiment of the present invention, a planar printing ink supply structure is provided, which squeezes the ink in the ink storage chamber onto the ink supply working surface by a driving component, and then takes away the squeezed ink by moving the brush component on the ink supply working surface. Compared with the ink supply structure of a traditional ink fountain, the squeezed ink is always on the surface of the ink supply workbench, and there is no need to consider the phase separation and leakage problems of the ink. In addition, the ink supply structure is simple, easy to implement and easy to clean.

[0045] Another object of the present invention is to provide an ink extrusion structure to solve the technical problems existing in the prior art.

[0046] In some illustrative embodiments, the ink extrusion structure includes: an ink supply working surface; a variable-volume ink storage cavity, disposed on one side of the ink supply working surface, with its ink supply port exposed on the surface on the other side of the ink supply working surface; and a driving component, controlling the volume change of the ink storage cavity to extrude ink from the ink storage cavity to the surface on the other side of the ink supply working surface.

[0047] The technical details of the ink extrusion structure in this embodiment can be referred to the above-mentioned planar printing ink supply structure, and will not be repeated here.

[0048] Another object of the present invention is to provide a planar printing device, which may include any of the planar printing ink supply structures or the ink extrusion structures described above.

[0049] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein may be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described around their functions. Whether such functions are implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system. A skilled person may implement the described functions in an adaptable manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of this disclosure.

Claims

1. A planar printing ink supply structure, characterized in that: include: An ink supply workbench having an ink supply work surface; An ink storage chamber with a variable volume is provided on one side of the ink supply working surface, and an ink supply port thereof is exposed on the surface of the other side of the ink supply working surface; a driving component for controlling the volume change of the ink storage cavity to squeeze the ink from the ink storage cavity onto the surface on the other side of the ink supply working surface; a coating roller, disposed on the other side of the ink supply working surface, and obtaining the extruded ink by contacting and moving relative to the surface of the ink supply working surface; There are multiple ink supply ports, which are distributed at intervals on the ink supply working surface.

2. The planar printing ink supply structure according to claim 1, characterized in that: The plurality of ink supply ports are distributed on the ink supply working surface at equal intervals; During the relative movement between the coating roller and the ink supply working surface, each of the ink supply ports contacts a different area of ​​the coating roller.

3. The planar printing ink supply structure according to claim 1, characterized in that: There are multiple ink storage chambers, and each of the ink storage chambers has at least one ink supply port; The driving component can control the ink extrusion amount of each ink storage cavity respectively, or control the ink storage cavities to maintain a uniform ink extrusion amount at the same time.

4. The planar printing ink supply structure according to claim 3, characterized in that: The driving component includes: a power source and an extrusion component connected to the power source. Under the drive of the power source, the extrusion component acts on each ink storage cavity with an equal external force, thereby controlling the ink storage cavity to maintain an equal amount of ink extrusion at the same time.

5. The planar printing ink supply structure according to claim 4, characterized in that: The power source is a motor, a hydraulic mechanism or a pneumatic mechanism.

6. The planar printing ink supply structure according to claim 1, characterized in that: The ink storage cavity is a piston cavity structure or a flexible cavity structure controlled by the driving component.

7. The planar printing ink supply structure according to claim 1, characterized in that: The ink storage chamber is arranged inside the ink supply workbench, and the driving component is assembled on the ink supply workbench.

8. An ink extrusion structure, characterized in that: include: An ink supply workbench having an ink supply work surface; An ink storage chamber with a variable volume is provided on one side of the ink supply working surface, and an ink supply port thereof is exposed on the surface of the other side of the ink supply working surface; a driving component for controlling the volume change of the ink storage cavity to squeeze the ink from the ink storage cavity onto the surface on the other side of the ink supply working surface; Wherein, the number of the ink supply ports is multiple and they are distributed at intervals on the ink supply working surface; During printing, a coating roller arranged on the other side of the ink supply working surface away from the ink storage cavity obtains the extruded ink by contacting with the surface of the ink supply working surface and generating relative movement.

9. A flat printing device, characterized in that: The method comprises the planar printing ink supply structure according to any one of claims 1 to 7 or the ink extrusion structure according to claim 8.

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