An ultra-thin multilayer piezoelectric ceramic side electrode printing device and printing method

Abstract

The invention discloses an ultra-thin multilayer piezoelectric ceramic side electrode printing device and a printing method, belonging to the field of printing, the printing device comprises: a screen printing tool, a side electric dip printing jig and a printing positioning tool; the screen printing tool is used to fix a blank organic film and print a silver paste pattern on the blank organic film; the side electric dip printing jig is used to insert a plurality of piezoelectric ceramic sheets, and the side surfaces of the same side of the plurality of piezoelectric ceramic sheets are flush; a printing area is provided on the printing positioning tool, the side electric dip printing jig is detachably arranged in the printing area, the printing positioning tool is used to fix the organic film with a silver paste pattern, and print the silver paste pattern on the organic film onto the piezoelectric ceramic sheet; it replaces screw fixing, thereby avoiding damage to the piezoelectric ceramic; the silver paste pattern on the organic film is printed on a plurality of piezoelectric ceramic sheets at the same time by the printing positioning tool, instead of printing one sheet at a time, thereby improving printing efficiency.

Description

Technical Field

[0001] The invention belongs to the field of printing, and in particular to an ultra-thin multilayer piezoelectric ceramic side electrode printing device and a printing method. Background Art

[0002] There are many printing methods for the existing ceramic stacking side electrode printing. One of them is to directly stack multiple piezoelectric ceramics together, place them in a stacking tool, fasten them with metal screws, and use the printing tool to position the sides of multiple piezoelectric ceramics to form a large plane, and then print them directly on the ceramics through a screen to complete the side electrode printing; the other is to first print a side electrode strip on a roller, and then push the ceramics piece by piece through a limiting groove for side electrode printing.

[0003] The first method of fixing ceramics with screws by brushing has a very high ceramic breakage rate, and the side electrode wrapping height is difficult to control, resulting in poor appearance. The second method of side electrode roller printing has high device cost and can only print one piece at a time, which is not easy to operate and is not suitable for ultra-thin multilayer piezoelectric ceramics. It has low efficiency. Therefore, it is necessary to design an ultra-thin multilayer piezoelectric ceramic side electrode printing device and printing method that will not damage the piezoelectric ceramics and has higher printing efficiency. Summary of the invention

[0004] In order to overcome the above technical defects, the present invention provides an ultra-thin multilayer piezoelectric ceramic side electrode printing device and printing method to solve the problems involved in the background technology.

[0005] The present invention provides an ultra-thin multilayer piezoelectric ceramic side electrode printing device, comprising: a screen printing tool, a side electric dip printing jig and a printing positioning tool; the screen printing tool is used to fix a blank organic film and print a silver paste pattern on the blank organic film; the side electric dip printing jig is used to insert a plurality of piezoelectric ceramic sheets, and the side surfaces of the same side of the plurality of piezoelectric ceramic sheets are flush; a printing area is provided on the printing positioning tool, the side electric dip printing jig is detachably arranged in the printing area, and the printing positioning tool is used to fix the organic film with a silver paste pattern, and print the silver paste pattern on the organic film onto the piezoelectric ceramic sheet.

[0006] Preferably or optionally, the screen printing tool includes a negative pressure adsorption tank for adsorbing a blank organic film, a metal plate is provided in the negative pressure adsorption tank, a plurality of adsorption holes are provided on the metal plate, a printing screen is provided on the negative pressure adsorption tank, and the blank organic film is placed between the printing screen and the metal plate, and the screen printing tool is used to print a silver paste pattern on the blank organic film.

[0007] Preferably or optionally, the side electro-dip printing jig includes a support body and a fixed plate, the fixed plate is fixedly connected to the support body, the fixed plate is provided with a plurality of vertically arranged slots, the slots are used to insert the piezoelectric ceramic sheets, the plurality of slots are evenly arranged along the length direction of the support body, the support body is provided with a thermal peeling tape, the thermal peeling tape is used to fix the piezoelectric ceramic sheets.

[0008] Preferably or optionally, the fixing plate is made of elastic resin, and the support body is made of metal.

[0009] Preferably or optionally, the printing positioning tooling comprises a base plate, a TPU film and a fixed frame arranged in sequence from bottom to top; an organic film with a silver paste pattern is arranged between the TPU film and the fixed frame; the printing area is arranged on the fixed frame, the side electric dip printing jig is placed sideways in the printing area, the side surface of the piezoelectric ceramic sheet corresponds to the printing area, and the printing positioning tooling is used to print the silver paste pattern of the organic film onto the side surface of the piezoelectric ceramic sheet.

[0010] Preferably or optionally, at least one second positioning post is provided on the side electro-dip printing jig.

[0011] Preferably or optionally, a second positioning hole is provided on the fixing frame, and the second positioning column of the side electro-dipping printing jig matches with the second positioning hole on the printing area.

[0012] Preferably or optionally, the organic film is a PET film, and the thickness of the blank organic film is 30-35 μm.

[0013] The present invention also discloses a method for printing side electrodes of ultra-thin multilayer piezoelectric ceramics, comprising the following steps:

[0014] S1: printing a silver paste pattern onto a blank PET film, the thickness of the blank PET film being 30-35 μm;

[0015] S2: inserting a plurality of piezoelectric ceramic sheets on a side electro-dipping jig, so that the side surfaces of the plurality of piezoelectric ceramic sheets on the same side are flush with each other;

[0016] S3: Install the PET film with the silver paste pattern into the printing positioning tooling;

[0017] S4: placing the side electric dip printing jig with the piezoelectric ceramic sheets on the printing positioning tool, with the side surfaces of the piezoelectric ceramic sheets facing downward, and pressing the side electric dip printing jig downward to complete printing;

[0018] S5: After pressing one side, the electrode is thermally cured at 100°C for 5 minutes, and then the other side is dip-printed;

[0019] S6: After printing on both sides, place the side electro-dip printing jig in a baking oven for baking at a temperature of 125±5°C for 30 to 50 seconds until the thermal peeling tape fails and the piezoelectric ceramic sheet falls off automatically.

[0020] Preferably or optionally, the S1 includes:

[0021] S101: placing the PET film on a metal plate with adsorption holes and turning on negative pressure;

[0022] S102: Add silver electrode paste on the printing screen, and print the silver paste pattern on the PET film with a scraper;

[0023] S103: After printing is completed, the PET film is taken out.

[0024] By adopting the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The multiple piezoelectric ceramic sheets of the present invention are inserted into a side electro-dip printing jig instead of being fixed with screws, thereby avoiding damage to the piezoelectric ceramics; the side surfaces of the multiple piezoelectric ceramic sheets are arranged flush with each other, and the side electro-dip printing jig is detachably arranged in the printing area, and the silver paste pattern on the organic film is simultaneously printed onto the multiple piezoelectric ceramic sheets through the printing positioning tooling, instead of printing one sheet at a time, thereby improving the printing efficiency.

[0026] (2) The negative pressure adsorption tank of the present invention is used to adsorb a blank organic film, which can prevent the organic film from shaking when printing a silver paste pattern. At the same time, the negative pressure adsorption tank is used to fix the organic film. Compared with other methods such as screw fixing, the organic film will not be damaged, and the organic film can be fixed in a shorter time, which is more convenient for installation and disassembly.

[0027] (3) The slots of the present invention are used to insert piezoelectric ceramic sheets. Multiple slots are evenly arranged along the length direction of the support body. The side surfaces of the multiple piezoelectric ceramic sheets are arranged flush with each other, so that the side surfaces of the multiple piezoelectric ceramic sheets form a large plane, which is convenient for printing positioning tooling and printing at the same time. Thermal peeling tape is used to fix the piezoelectric ceramic sheets, which will not damage the piezoelectric ceramic sheets and is more convenient to install and disassemble.

[0028] (4) The material of the fixing plate of the present invention is elastic resin. Compared with other materials, the fixing plate made of elastic resin will not scratch the piezoelectric ceramic sheet.

[0029] (5) The second positioning column of the side electro-dip printing jig of the present invention cooperates with the second positioning hole on the printing area, so as to facilitate the rapid placement of the side electro-dip printing jig to a predetermined position. At the same time, when the side electro-dip printing jig is pressed downward, the movement of the side electro-dip printing jig is prevented to affect printing.

[0030] (6) The present invention performs thermal curing of the electrode at a temperature of 100°C for 5 minutes, and the curing effect is better; the baking temperature is 125±5°C, and the baking time is 30 to 50 seconds, the thermal peeling tape will fail, and the ceramic sheet can fall off automatically, which is more convenient to disassemble than other fixing methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an exploded view of the screen printing tooling of the present invention.

[0032] Figure 2 It is a schematic structural diagram of the side electro-dip printing jig of the present invention.

[0033] Figure 3 It is an exploded view of the printing positioning tooling of the present invention.

[0034] The accompanying drawings are marked as follows:

[0035] Screen printing tooling 1,

[0036] Negative pressure adsorption tank 11, first positioning column 111, second cavity 112, third cavity 113, partition 114, air suction hole 115, printing screen 12, screen 121, frame 122, first cavity 123, first positioning hole 124, metal plate 13, adsorption hole 131,

[0037] Side electro-dipping jig 2, support body 21, fixing plate 22, slot 221, thermal stripping tape 23, second positioning column 24,

[0038] Printing positioning tool 3, bottom plate 31, third positioning column 311, TPU film 32, fourth positioning hole 321, fixing frame 33, fifth positioning hole 331, printing area 332,

[0039] Organic film 4, third positioning hole 41,

[0040] Piezoelectric ceramic sheet 5. DETAILED DESCRIPTION

[0041] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0047] (Example 1)

[0048] See also Figures 1 to 3 The ultra-thin multilayer piezoelectric ceramic side electrode printing device of this embodiment includes: a screen printing tool 1, a side electric dip printing fixture 2 and a printing positioning tool 3.

[0049] The screen printing tool 1 comprises a negative pressure adsorption tank 11 and a printing screen 12. The printing screen 12 is detachably mounted on the upper end surface of the negative pressure adsorption tank 11, and is convenient to mount and dismount.

[0050] In a further embodiment, the printing screen 12 includes a screen 121 and a frame 122. The screen 121 is fixed under the frame 122. A first cavity 123 is formed between the screen 121 and the frame 122. The first cavity 123 is used to contain the silver electrode paste required for printing. The silver electrode paste is known to those skilled in the art.

[0051] In a further embodiment, first positioning columns 111 are provided at the four corners of the upper end surface of the negative pressure adsorption tank 11, and first positioning holes 124 are provided at the four corners of the frame 122. The first positioning holes 124 are inserted into the first positioning holes 124 to fix the printing screen 12 on the negative pressure adsorption tank 11, which is convenient for installation and disassembly.

[0052] In a further embodiment, a second cavity 112 is provided on the upper surface of the negative pressure adsorption tank 11, and the upper surface of the second cavity 112 continues to be recessed downward to form a plurality of third cavities 113, and partitions 114 are provided between adjacent third cavities 113, and an air suction hole 115 is provided on the side of the screen printing tooling 1, and the air suction hole 115 is communicated with the third cavity 113.

[0053] In a further embodiment, the screen printing tool 1 also includes a metal plate 13, which is provided with a plurality of adsorption holes 131, and the adsorption holes 131 penetrate the upper and lower end surfaces of the metal plate 13. When the metal plate 13 is placed in the second cavity 112, the partition 114 supports the metal plate 13, and the adsorption holes 131 on the metal plate 13 correspond to the third cavity 113, and the suction holes 115 can absorb air through the adsorption holes 131.

[0054] In a further embodiment, a blank organic film 4 is provided between the metal plate 13 and the printing screen 12, and a third positioning hole 41 is provided on the blank organic film 4. When in use, the third positioning hole 41 corresponds to the first positioning hole 124 of the frame 122 and the first positioning column 111 on the negative pressure adsorption groove 11. The first positioning column 111 is inserted into the third positioning hole 41 and the first positioning hole 124 from bottom to top in sequence to prevent the organic film 4 and the printing screen 12 from shaking during printing.

[0055] In a further embodiment, a scraper is used to press and scrape the silver electrode paste in the first cavity 123, so as to form a silver paste pattern on the blank organic film 4, and the suction hole 115 of the negative pressure adsorption tank 11 absorbs air. The blank organic film 4 is tightly adsorbed on the metal plate 13 due to its airtightness, which can prevent the blank organic film 4 from wrinkling when the scraper is pressed and scraped. Compared with other methods such as screw fixing, the organic film 4 will not be damaged, and the organic film 4 can be fixed in a shorter time, and the installation and disassembly are also convenient.

[0056] In a further embodiment, the side electro-dip printing jig 2 includes a support body 21 and a fixed plate 22. Two fixed plates 22 are provided. The two fixed plates 22 have the same structure. The two fixed plates 22 are respectively fixed on the front and rear end surfaces of the support body 21. The fixed plate 22 is provided with a plurality of vertically arranged slots 221. The plurality of slots 221 are evenly arranged along the length direction of the support body 21. The slots 221 are used to insert the piezoelectric ceramic sheet 5 instead of fixing it with screws, thereby avoiding damage to the piezoelectric ceramic.

[0057] In a further embodiment, the side surfaces of the same side of the multiple piezoelectric ceramic sheets 5 inserted in the slots 221 are flush, so that the side surfaces of the same side of the multiple piezoelectric ceramic sheets 5 form a large plane, and the printing positioning tooling 3 can print the silver paste pattern on the organic film 4 onto the multiple piezoelectric ceramic sheets 5 at the same time, instead of printing one by one, thereby improving the printing efficiency.

[0058] In a further embodiment, a thermal peeling tape 23 is provided on the upper end surface of the support body 21, and the thermal peeling tape 23 is adhered to the bottom of the piezoelectric ceramic sheet 5 to prevent the piezoelectric ceramic sheet 5 from loosening, and the installation and disassembly are more convenient. At the same time, the thermal peeling tape 23 has a certain adhesive force at room temperature, can play a positioning role, and can meet various precision processing requirements. As long as the temperature is heated to the set temperature, the adhesive force will disappear in 30-50 seconds, and simple peeling can be achieved with less residue and no pollution to the adherend.

[0059] In a further embodiment, the material of the fixing plate 22 is elastic resin, and the material of the support body 21 is metal. Compared with other materials, the fixing plate 22 made of elastic resin will not scratch the piezoelectric ceramic sheet 5.

[0060] In a further embodiment, the printing positioning tooling 3 includes a base plate 31, a TPU film 32 and a fixed frame 33 which are arranged in sequence from bottom to top, the base plate 31 is made of metal, a third positioning column 311 is provided on the base plate 31, a fourth positioning hole 321 is provided on the TPU film 32, and a fifth positioning hole 331 is provided on the fixed frame 33. The third positioning column 311 corresponds to the fourth positioning hole 321 and the fifth positioning hole 331, and the organic film 4 with a silver paste pattern is arranged between the TPU film 32 and the fixed frame 33, and the TPU film 32 and the fixed frame 33 are used to clamp the organic film 4 with a silver paste pattern.

[0061] In a further embodiment, the material of the fixing frame 33 is ABS.

[0062] In a further embodiment, a printing area 332 is provided on the fixed frame 33, and a large plane formed by the side surfaces of the multiple piezoelectric ceramic sheets 5 of the side electro-dipping jig 2 is placed in the printing area 332, and the printing positioning tooling 3 is used to simultaneously print the silver paste pattern of the organic film 4 onto the side surfaces of the multiple piezoelectric ceramic sheets 5.

[0063] In a further embodiment, two second positioning posts 24 are provided on the side electro-dip printing jig 2 . The second positioning posts 24 are located on a surface of the side electro-dip printing jig 2 that is perpendicular to the piezoelectric ceramic sheet 5 .

[0064] In a further embodiment, a second positioning hole is provided on the fixed frame 33, and the second positioning column 24 of the side electro-dip printing jig 2 cooperates with the second positioning hole on the printing area 332, so as to facilitate the side electro-dip printing jig 2 to be quickly placed in a predetermined position, and at the same time, in the process of pressing the side electro-dip printing jig 2 downward, the side electro-dip printing jig 2 is prevented from moving and affecting printing.

[0065] In a further embodiment, the organic film 4 is a PET film, and the thickness of the blank organic film 4 is 30-35 μm.

[0066] In order to facilitate understanding of the technical solution of the present invention, a brief description of its working process is given below:

[0067] First, the PET film is placed on the metal plate 13 with adsorption holes 131, and negative pressure is turned on so that the PET film is adsorbed on the metal plate 13. Silver electrode paste is added to the printing screen 12, and a silver paste pattern is printed on the PET film with a scraper. After printing is completed, the PET film with the silver paste pattern is taken out;

[0068] Secondly, insert multiple piezoelectric ceramic sheets 5 on the side electro-dip printing jig 2, and align the sides of the multiple piezoelectric ceramic sheets 5. Install the PET film with the silver paste pattern into the printing positioning jig 3. Put the side electro-dip printing jig 2 with the piezoelectric ceramic sheets 5 on the printing positioning jig 3. Set the side of the multiple piezoelectric ceramic sheets 5 downward, and press the side electro-dip printing jig 2 downward to complete the printing.

[0069] Then, after pressing one side, the electrode was thermally cured at 100°C for 5 min, and then dip printing was performed on the other side;

[0070] Finally, after printing on both sides, place the side electro-dipping jig 2 in a baking oven for baking at a temperature of 125±5°C for 30 to 50 seconds. When the thermal stripping tape 23 fails and the piezoelectric ceramic sheet 5 automatically falls off, the piezoelectric ceramic sheet 5 is taken out.

[0071] (Example 2)

[0072] This embodiment discloses a method for printing side electrodes of ultra-thin multilayer piezoelectric ceramics, comprising the following steps:

[0073] S1: printing a silver paste pattern onto a blank PET film, wherein the thickness of the blank PET film is 30 to 35 μm; S1 includes:

[0074] S101: placing the PET film on the metal plate 13 with adsorption holes 131 and turning on the negative pressure;

[0075] S102: Add silver electrode paste on the printing screen 12, and print the silver paste pattern on the PET film with a scraper;

[0076] S103: After printing is completed, the PET film is taken out.

[0077] S2: inserting a plurality of piezoelectric ceramic sheets 5 on the side electro-dipping jig 2, so that the side surfaces of the plurality of piezoelectric ceramic sheets 5 are flush with each other;

[0078] S3: Install the PET film with the silver paste pattern into the printing positioning tool 3;

[0079] S4: Place the side electro-dipping printing jig 2 with the piezoelectric ceramic sheets 5 installed on the printing positioning tool 3, with the side faces of the piezoelectric ceramic sheets 5 facing downward, and press the side electro-dipping printing jig 2 downward to complete printing;

[0080] S5: After pressing one side, the electrode is thermally cured at 100°C for 5 minutes, and then the other side is dip-printed and the electrode is thermally cured at 100°C for 5 minutes, which has a better curing effect;

[0081] S6: After printing on both sides, place the side electro-dip printing jig 2 in a baking oven for baking at a temperature of 125±5°C for 30 to 50 seconds. When the thermal stripping tape 23 fails, the piezoelectric ceramic sheet 5 automatically falls off. Compared with other fixing methods, disassembly is more convenient.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. An ultra-thin multilayer piezoelectric ceramic side electrode printing device, characterized in that: include: A screen printing tool (1), a side electro-dip printing jig (2) and a printing positioning tool (3); the screen printing tool (1) is used to fix a blank organic film (4) and print a silver paste pattern on the blank organic film (4); the side electro-dip printing jig (2) is used to insert a plurality of piezoelectric ceramic sheets (5), and the side surfaces of the plurality of piezoelectric ceramic sheets (5) on the same side are flush; a printing area (332) is provided on the printing positioning tool (3), the side electro-dip printing jig (2) is detachably arranged in the printing area (332), and the printing positioning tool (3) is used to fix an organic film (4) with a silver paste pattern and print the silver paste pattern on the organic film (4) onto the piezoelectric ceramic sheet (5); The screen printing tool (1) comprises a negative pressure adsorption tank (11) for adsorbing a blank organic film (4), a metal plate (13) is provided in the negative pressure adsorption tank (11), a plurality of adsorption holes (131) are provided on the metal plate (13), a printing screen (12) is provided on the negative pressure adsorption tank (11), the blank organic film (4) is placed between the printing screen (12) and the metal plate (13), and the screen printing tool (1) is used to print a silver paste pattern on the blank organic film (4); The side electro-dip printing jig (2) comprises a support body (21) and a fixing plate (22); the fixing plate (22) is made of elastic resin, the support body (21) is made of metal, and the fixing plate (22) is fixedly connected to the support body (21); the fixing plate (22) is provided with a plurality of vertically arranged slots (221), the slots (221) being used to insert the piezoelectric ceramic sheet (5); the plurality of slots (221) are evenly arranged along the length direction of the support body (21); the support body (21) is provided with a thermal stripping tape (23), the thermal stripping tape (23) being used to fix the piezoelectric ceramic sheet (5); The printing positioning tool (3) comprises a bottom plate (31), a TPU film (32) and a fixing frame (33) which are arranged in sequence from bottom to top; an organic film (4) with a silver paste pattern is arranged between the TPU film (32) and the fixing frame (33); the printing area (332) is arranged on the fixing frame (33), the side electro-dipping jig (2) is placed sideways in the printing area (332), the side of the piezoelectric ceramic sheet (5) corresponds to the printing area (332), and the printing positioning tool (3) is used to print the silver paste pattern of the organic film (4) onto the side of the piezoelectric ceramic sheet (5).

2. According to the ultra-thin multilayer piezoelectric ceramic side electrode printing device according to claim 1, at least one second positioning column (24) is provided on the side electro-dipping printing jig (2).

3. The ultra-thin multilayer piezoelectric ceramic side electrode printing device according to claim 2, characterized in that: The fixing frame (33) is provided with a second positioning hole, and the second positioning column (24) of the side electro-dipping printing jig (2) matches the second positioning hole on the printing area (332).

4. The ultra-thin multilayer piezoelectric ceramic side electrode printing device according to claim 1, characterized in that: The organic film (4) is a PET film, and the thickness of the blank organic film (4) is 30-35 μm.

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