Screen printing machine

Abstract

The utility model relates to a screen printing machine which comprises a printing mechanism and an auxiliary replacement mechanism. The printing mechanism comprises a printing hanging frame and a glue scraping assembly installed on the printing hanging frame. The auxiliary replacement mechanism comprises a fixing part, a connecting part and a recovery tank; the fixing part is detachably connected with the printing hanging frame, the recycling groove is located below the glue scraping assembly, one end of the connecting part is connected with the fixing part, and the other end of the connecting part is connected with the recycling groove. When a glue scraping plate of a printing mechanism is replaced, the recovery tank of the auxiliary replacement mechanism of the screen printing machine can recover dry slurry or foreign matters which are adhered to the glue scraping plate and fall off from the bottom, so that the dry slurry and the foreign matters are prevented from falling on a printing screen below, inner electrode slurry during next printing is prevented from being polluted, and the quality of an MLCC product is improved.

Description

Technical Field

[0001] This application relates to the technical field of MLCC printing, and in particular to a screen printing machine. Background Technology

[0002] MLCC (Multi-layer Ceramic Capacitor), also known as multilayer capacitor or laminated capacitor, is the most widely used type of capacitor. MLCC is formed by stacking ceramic dielectric films with printed electrodes (internal electrodes) in an alternating pattern, sintering them at high temperature to form a ceramic block, and then sealing the ends of the ceramic block with metal layers (external electrodes).

[0003] The internal electrode printing process of MLCC is usually screen printing, which involves printing the internal electrode paste onto the ceramic film through a printing screen, and then drying it to obtain a clear and complete dielectric film.

[0004] Screen printing machines typically include a printing platform and a printing mechanism set above the printing platform. A printing screen is set on the printing platform. After the printing screen covers the ceramic film to be printed, the printing mechanism drives the squeegee at its bottom to scrape the inner electrode paste evenly into the mesh of the printing screen by moving horizontally.

[0005] In traditional technology, when the squeegee is replaced, the dried paste and foreign matter adhering to the squeegee fall onto the printing screen below. During the next printing operation, the dried paste or foreign matter mixes into the internal electrode paste, thus contaminating the internal electrode paste and reducing the quality of MLCC products. Utility Model Content

[0006] Therefore, it is necessary to provide a screen printing machine that can solve the above-mentioned technical problems.

[0007] The above-mentioned objective of this application is achieved through the following technical solution:

[0008] This application provides a screen printing machine, including a printing mechanism and an auxiliary changing mechanism;

[0009] The printing mechanism includes a printing rack and a scraping assembly mounted on the printing rack;

[0010] The auxiliary replacement mechanism includes a fixing part, a connecting part, and a recycling tank; the fixing part is detachably connected to the printing hanger, the recycling tank is located below the glue scraping assembly, one end of the connecting part is connected to the fixing part, and the other end of the connecting part is connected to the recycling tank.

[0011] In one embodiment, the printing rack is I-shaped, with vertical plates on both sides and a horizontal plate in the middle connecting the two vertical plates. The glue scraping assembly is installed on the horizontal plate. The fixing part, the connecting part, and the recycling trough are all located between the two vertical plates, and the fixing part is detachably connected to the horizontal plate.

[0012] In one embodiment, the scraping assembly includes a scraping cylinder and a scraping frame connected to each other, the scraping cylinder being mounted above the horizontal plate and the scraping frame being mounted below the horizontal plate, the scraping frame having a scraping blade mounted on it;

[0013] The fixing part includes two parts, and the two fixing parts are detachably connected to the horizontal plate on both sides of the glue scraping cylinder;

[0014] The connecting part includes two corresponding parts, one end of the two connecting parts is connected to the corresponding fixing part, and the other end of the two connecting parts is connected to the recycling tank.

[0015] In one embodiment, the other end of the connecting part is connected to the rear side of the recycling tank, and the fixing part includes a horizontal fixing plate, which is placed on the horizontal plate. The rear end of the horizontal fixing plate extends to be flush with the rear side of the recycling tank so that the connecting part is vertically arranged.

[0016] The projection of the front end of the horizontal fixing plate in the vertical direction is located in the recycling trough, so that the projection of the center of gravity of the auxiliary replacement mechanism in the vertical direction falls on the contact surface between the horizontal fixing plate and the horizontal plate.

[0017] In one embodiment, the fixing part further includes a vertical limiting plate, which is disposed at the front end of the horizontal fixing plate and is vertically downward.

[0018] In one embodiment, the bottom of the horizontal fixing plate is provided with an anti-slip layer, which is used to increase the friction between the bottom of the horizontal fixing plate and the surface of the horizontal plate.

[0019] In one embodiment, the recycling tank includes a bottom plate and enclosing side plates, the bottom plate being inclined with its rear side higher than its front side.

[0020] In one embodiment, the side plate includes a front side plate located in front of the base plate, the two ends of the front side plate being detachably connected to the side plates on the left and right sides, and the front side plate being rotatably connected to the front side of the base plate about the left and right side axes of the base plate.

[0021] In one embodiment, the fixing part, the connecting part, and the recycling tank are made of stainless steel.

[0022] This application has the following beneficial effects:

[0023] This application incorporates an auxiliary replacement mechanism on a screen printing machine. This mechanism is detachably mounted on the printing hanger of the printing mechanism via a fixing part. When replacing the squeegee of the printing mechanism, the recovery tank of this auxiliary replacement mechanism can collect dried paste or foreign matter that has adhered to the squeegee and fallen from the bottom, preventing dried paste and foreign matter from falling onto the printing screen below, thus avoiding contamination of the internal electrode paste for the next printing and improving the quality of MLCC products. The auxiliary replacement mechanism used in the screen printing machine of this application has a simple structure, is easy to use, and can be easily fixed and disassembled on the printing hanger, while also facilitating the cleaning of collected dried paste or foreign matter. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a screen printing machine in an exemplary embodiment;

[0025] Figure 2 for Figure 1 Cross-sectional view;

[0026] Figure 3 This is a schematic diagram of the structure of an auxiliary replacement device in an exemplary embodiment.

[0027] Explanation of icon numbers:

[0028] 100. Screen printing machine; 10. Printing mechanism; 11. Printing hanger; 111. Vertical plate; 112. Horizontal plate; 12. Squeegee assembly; 121. Squeegee blade; 122. Squeegee cylinder; 123. Squeegee frame; 124. Slot; 125. Locking fastener; 20. Auxiliary replacement mechanism; 21. Fixing part; 211. Horizontal fixing plate; 212. Vertical limiting plate; 22. Connecting part; 23. Recycling tank; 231. Base plate; 232. Side plate; 2321. Front side plate. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, a detailed description of specific embodiments of this application is provided below. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] To address the technical problems mentioned in the background section, this application provides a screen printing machine, such as... Figure 1 As shown, in one embodiment, the screen printing machine 100 includes a printing mechanism 10 and an auxiliary replacement mechanism 20. The printing mechanism 10 is disposed above a printing platform 30, on which a printing screen (not shown) is mounted. After the printing screen covers the ceramic film (not shown) to be printed, the printing mechanism 10 drives the squeegee 121 at its bottom to move horizontally, uniformly scraping the inner electrode paste into the mesh of the printing screen. The auxiliary replacement mechanism 20 is used to recover the dried paste and foreign matter that adheres to the squeegee 121 and falls off when the squeegee is replaced, so as to prevent the dried paste and foreign matter from falling onto the printing screen below.

[0033] Specifically, such as Figure 1-3 As shown, the printing mechanism 10 includes a printing hanger 11 and a scraper assembly 12 mounted on the printing hanger 11. The printing hanger 11 is positioned above the printing platform 30. The structure of the printing hanger 11 includes a part connected to a horizontal moving device mounted on the printing platform 30 and a part on which the scraper assembly 12 is mounted. Under the drive of the horizontal moving device on the printing platform 30, the printing hanger 11 drives the scraper assembly 12 to move horizontally as a whole to achieve the scraping operation.

[0034] The auxiliary replacement mechanism 20 includes a fixing part 21, a connecting part 22, and a recycling tank 23; the fixing part 21 is detachably connected to the printing hanger 11, the recycling tank 23 is located below the scraping assembly 12, one end of the connecting part 22 is connected to the fixing part 21, and the other end of the connecting part 22 is connected to the recycling tank 23.

[0035] In this embodiment, the fixing part 21 and the printing hanger 11 are detachably connected. That is, when it is necessary to replace the squeegee 121 at the bottom of the squeegee assembly 12, the fixing part 21 is connected to the printing hanger 11 so that the recovery tank 23 is located below the squeegee assembly 12 and above the printing screen on the printing platform 30. Thus, the recovery tank 23 can collect the dried paste and foreign objects that adhere to the squeegee 121 and fall off, preventing the dried paste and foreign objects from falling onto the printing screen below. After replacing the squeegee 121, the connection between the fixing part 21 and the printing hanger 11 can be separated or removed, that is, the auxiliary replacement mechanism 20 can be removed from the printing hanger 11 as a whole, so as not to affect the normal operation of the screen printing machine.

[0036] In this embodiment, the fixing part 21 may be connected to the part of the printing hanger 11 that is connected to the horizontal moving device or the part that installs the scraper assembly 12. Its detachable connection method may be a threaded fastening connection, a clamping connection, a snap-fit ​​connection using a buckle or lock, a snap-fit ​​connection using a bayonet or slot, a connection maintained by the friction between the fixing part 21 and the printing hanger 11, or a fitting connection achieved by the fit of the geometric shape and size between the fixing part 21 and the printing hanger 11.

[0037] like Figure 1 As shown, in one embodiment, the printing hanger 11 is H-shaped, with vertical plates 111 on the left and right sides and a horizontal plate 112 connecting the two vertical plates in the middle. The vertical plates 111 on both sides are connected to the horizontal moving device set on the printing platform 30, and the horizontal plate 112 is the part for mounting the squeegee assembly 12. The squeegee assembly 12 is mounted on the horizontal plate 112; the fixing part 21, the connecting part 22, and the recycling groove 23 are all located between the two vertical plates 111. The fixing part 21 moves in a direction parallel to the vertical plates 111 and is detachably connected to the horizontal plate 112 between the two vertical plates 111. In this embodiment, the printing hanger 11 needs to be connected to the horizontal moving device through the vertical plates 111 on both sides. Therefore, to facilitate the installation and disassembly of the auxiliary replacement mechanism 20, the auxiliary replacement mechanism 20 in this embodiment moves from the front or rear side of the printing hanger 11 to connect with the printing hanger 11.

[0038] like Figure 1-2 As shown, in one embodiment, the scraper assembly 12 includes a scraper cylinder 122 and a scraper frame 123 connected to each other. The scraper cylinder 122 is installed above the horizontal plate 112, and the scraper frame 123 is installed below the horizontal plate 112. The scraper plate 121 is installed on the scraper frame 123. The scraper cylinder 122 is connected to the scraper frame 123 through a hole in the horizontal plate 112 and is used to control the scraper frame 123 to move up and down, so as to drive the scraper plate 121 to move up and down.

[0039] like Figure 1-2 As shown, in one embodiment, the bottom of the scraper 123 of this application embodiment has a downward-opening groove 124, into which the scraper 121 is inserted. Simultaneously, a plurality of fixing holes are provided on the side wall of the groove 124, and a plurality of locking fasteners 125 pass through the fixing holes to lock the scraper 121 into the groove 124. In this embodiment, the locking fasteners can be screws or locking pins, etc.

[0040] In this embodiment, to avoid obstructing the scraping cylinder 122, preferably, the fixing part 21 includes two parts, and the two fixing parts 21 are detachably connected to the horizontal plate 112 on the left and right sides of the scraping cylinder 122, respectively. Correspondingly, the connecting part 22 in this embodiment also includes two parts, one end of the two connecting parts 22 is connected to the corresponding fixing part 21, and the other end of the two connecting parts 22 is connected to the recycling tank 23.

[0041] In one embodiment, such as Figure 1 and Figure 2 As shown, in order to simplify the structure of the auxiliary replacement mechanism 20 of this application and without affecting its fixing effect with the printing hanger 11, the other end of the connecting part 22 is connected to the rear side of the recycling tank 23. The fixing part 21 includes a horizontal fixing plate 211, which is placed on the horizontal plate 112. The rear end of the horizontal fixing plate 211 extends to be flush with the rear side of the recycling tank 23 in the vertical direction, so that the connecting part 22 is vertically set and connects the rear end of the horizontal fixing plate 211 to the rear end of the recycling tank 23.

[0042] In this embodiment, the projection of the front end of the horizontal fixing plate 211 in the vertical direction is located in the recycling trough 23, so that the projection of the center of gravity of the auxiliary replacement mechanism 20 in the vertical direction falls on the contact surface between the horizontal fixing plate 211 and the horizontal plate 112. Therefore, when the horizontal fixing plate 211 and the horizontal plate 112 are connected by friction, the auxiliary replacement mechanism 20 will not tilt, thus the auxiliary replacement mechanism 20 can be fixed more stably on the horizontal plate 112, so that the auxiliary replacement mechanism 20 remains stable during use.

[0043] Since dried slurry and foreign matter falling into the recycling tank 23 during the replacement of the scraper blade 121 may affect the stability of the auxiliary replacement mechanism 20, in a preferred embodiment, an anti-slip layer is provided on the bottom of the horizontal fixing plate 211. Specifically, the anti-slip layer may be an anti-slip coating with a high coefficient of friction applied to the bottom of the horizontal fixing plate 211, or it may be an anti-slip layer made of materials such as rubber, rubber granule mixture, or other materials adhered to the bottom of the horizontal fixing plate 211. In other examples, the anti-slip layer may also be a rough surface layer formed on the bottom of the horizontal fixing plate 211 by creating tiny scratches or textures.

[0044] To further maintain the stability of the auxiliary replacement mechanism 20 during use, such as Figure 1 and Figure 3 As shown, in one embodiment, the fixing part 21 further includes a vertical limiting plate 212, which is disposed at the front end of the horizontal fixing plate 211 and is disposed vertically downward, so that the auxiliary replacement mechanism 20 as a whole will not detach from the connection with the horizontal plate 112 due to sliding to the rear.

[0045] To better recover the dried pulp and foreign objects adhering to the scraper 121, and to prevent them from being ejected outside the recovery tank 23 due to rebound force when they fall into the recovery tank 23, in one embodiment, the recovery tank 23 includes a bottom plate and enclosing side plates. The bottom plate is inclined, with its rear side higher than its front side. That is, after the dried pulp and foreign objects fall onto the bottom plate of the recovery tank 23, they will move towards the front of the bottom plate, thus preventing them from being ejected to the rear or left and right sides outside the recovery tank 23.

[0046] In one embodiment, this application cleans the dried slurry or foreign matter in the recycling tank 23 by scraping with a scraper. For easier cleaning, such as... Figure 3 As shown, the side plate of the recycling tank 23 includes a front side plate 2321 located in front of the bottom plate 231. The two ends of the front side plate 2321 are detachably connected to the side plates on the left and right sides. The front side plate 2321 is rotatably connected to the front side of the bottom plate 231 around the left and right side axis directions of the bottom plate 231.

[0047] In this embodiment, the front side plate 2321 can be rotatably connected to the front side of the bottom plate 231 by a hinge, wherein the rotatable connection is a sealed type to prevent dry slurry or foreign objects from falling from the connection between the two. The left and right sides of the front side plate 2321 can be connected to the front ends of the left and right side plates by a snap-fit ​​connection to fix the front side plate 2321. When the front side plate 2321 is disengaged from the connection between the left and right side plates and rotated open, the dry slurry or foreign objects in the recycling tank 23 can be easily cleaned by scraping from back to front with a scraper.

[0048] In a preferred embodiment, the fixing part, connecting part and recycling tank of this application are made of metal, such as stainless steel. Specifically, the vertical limiting plate 212, the horizontal fixing plate 211, the connecting part 22 and the recycling tank 23 are connected by welding.

[0049] This application incorporates an auxiliary replacement mechanism on a screen printing machine. This mechanism is detachably mounted on the printing hanger of the printing mechanism via a fixing part. When replacing the squeegee of the printing mechanism, the recovery tank of this auxiliary replacement mechanism can collect dried paste or foreign matter that has adhered to the squeegee and fallen from the bottom, preventing dried paste and foreign matter from falling onto the printing screen below, thus avoiding contamination of the internal electrode paste for the next printing and improving the quality of MLCC products. The auxiliary replacement mechanism used in the screen printing machine of this application has a simple structure, is easy to use, and can be easily fixed and disassembled on the printing hanger, while also facilitating the cleaning of collected dried paste or foreign matter.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A screen printing machine, characterized in that: Including printing mechanism and auxiliary replacement mechanism; The printing mechanism includes a printing rack and a scraping assembly mounted on the printing rack; The auxiliary replacement mechanism includes a fixing part, a connecting part, and a recycling tank; the fixing part is detachably connected to the printing hanger, the recycling tank is located below the glue scraping assembly, one end of the connecting part is connected to the fixing part, and the other end of the connecting part is connected to the recycling tank.

2. The screen printing machine as described in claim 1, characterized in that: The printing rack is I-shaped, with vertical plates on both sides and a horizontal plate in the middle connecting the two vertical plates. The glue scraping assembly is installed on the horizontal plate. The fixing part, the connecting part, and the recycling tank are all located between the two vertical plates, and the fixing part is detachably connected to the horizontal plate.

3. The screen printing machine as described in claim 2, characterized in that: The glue scraping assembly includes a glue scraping cylinder and a glue scraping frame connected to each other. The glue scraping cylinder is installed above the horizontal plate, and the glue scraping frame is installed below the horizontal plate. A glue scraping plate is installed on the glue scraping frame. The fixing part includes two parts, and the two fixing parts are detachably connected to the horizontal plate on both sides of the glue scraping cylinder; The connecting part includes two corresponding parts, one end of the two connecting parts is connected to the corresponding fixing part, and the other end of the two connecting parts is connected to the recycling tank.

4. The screen printing machine as described in claim 2 or 3, characterized in that: The other end of the connecting part is connected to the rear side of the recycling tank. The fixing part includes a horizontal fixing plate, which is placed on the horizontal plate. The rear end of the horizontal fixing plate extends to be flush with the rear side of the recycling tank so that the connecting part is set vertically. The projection of the front end of the horizontal fixing plate in the vertical direction is located in the recycling trough, so that the projection of the center of gravity of the auxiliary replacement mechanism in the vertical direction falls on the contact surface between the horizontal fixing plate and the horizontal plate.

5. The screen printing machine as described in claim 4, characterized in that: The fixing part also includes a vertical limiting plate, which is disposed at the front end of the horizontal fixing plate and is set vertically downward.

6. The screen printing machine as described in claim 4, characterized in that: The bottom of the horizontal fixing plate is provided with an anti-slip layer, which is used to increase the friction between the bottom of the horizontal fixing plate and the surface of the horizontal plate.

7. The screen printing machine as described in claim 3, characterized in that: The recycling tank includes a bottom plate and enclosing side plates, the bottom plate being inclined, with its rear side higher than its front side.

8. The screen printing machine as described in claim 7, characterized in that: The side plate includes a front side plate located in front of the base plate. The two ends of the front side plate are detachably connected to the side plates on the left and right sides. The front side plate is rotatably connected to the front side of the base plate around the left and right side axes of the base plate.

9. The screen printing machine as described in claim 8, characterized in that: The fixing part, the connecting part, and the recycling tank are made of stainless steel.

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