Block lamination method of multilayer ceramic capacitor and equipment thereof

Abstract

The invention relates to the technical field of capacitor manufacturing, and discloses a block lamination method of a multilayer ceramic capacitor, which comprises the following steps of: feeding protective films, cutting the protective films in a protective film conveying process, stacking a plurality of protective films on a protective film stripping table, and simultaneously adsorbing the plurality of protective films to a lamination carrying table; laminating a bottom protective film, feeding a dielectric film roll, and cutting in a dielectric film conveying process; the dielectric diaphragms are laminated, and the in-place identification mode of the dielectric diaphragms is optimized; laminating a top protective film; the invention also discloses a block lamination device of the multilayer ceramic capacitor, the protective film conveying mechanism is provided with a first vertical cutting assembly and a first transverse cutting assembly, and the dielectric film conveying mechanism is provided with a second vertical cutting assembly and a second transverse cutting assembly; according to the invention, the lamination efficiency of the block lamination is improved, so that the dielectric diaphragm only needs to be provided with a mark point and does not need to be provided with a stripping mark point, the width required by the dielectric diaphragm is reduced, and materials are saved and dangerous waste materials are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor manufacturing, and particularly to a bar stack device for multi-layer ceramic capacitors. Background Art

[0002] In the field of multi-layer ceramic capacitors (MLCC), the lamination in the key process is to stack the protective layer (protective film sheet) coated in the previous process and the dielectric layer (dielectric film sheet) in the screen printing process together according to the design formula to form a bar of multi-layer ceramic capacitors; since the protective layer is a uniform ceramic dielectric and no alignment is required during the lamination process, when the lamination device is started up, the conveyance of the protective layer can be automatically paused on the protective layer peeling table, the conveying device cuts the protective film on the protective layer peeling table to form the required protective film sheet, then adsorbs and transfers it to the lamination stage, and the conveying device repeats the above actions until the number of stacked protective film sheets meets the preset requirements. After the conveying device moves to the protective layer peeling table, it needs to be cut first before adsorption, and at this time, the cutting time is included in the production cycle time, and the protective film sheets are transferred layer by layer to the lamination stage, so the overall efficiency is low; moreover, there are two types of marking points in the dielectric film sheet. One is the marking mark point for identifying whether the conveying device and the dielectric film sheet are accurately matched; the other is the peeling mark point for identifying the arrival of the next dielectric film sheet. Usually, the peeling mark point is located on the outer periphery of the dielectric film sheet. The internal electrode dielectric pattern, the marking mark point, and the peeling mark point in the dielectric film sheet are all colored. The detection head for detecting the peeling mark point will make its detection range on the outer periphery of the dielectric film sheet during installation, so that only the peeling mark point can be recognized. Therefore, when the signal of the detection head changes from white to black, that is, when it is recognized that the next dielectric film sheet arrives, the width of the peeling mark point occupying the dielectric film sheet is relatively wide, resulting in more material waste and the generation of hazardous waste, and greatly increasing the recycling cost of the subsequent hazardous waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a bar stack device for multi-layer ceramic capacitors, which improves the lamination efficiency of bar stacking, enables the dielectric film sheet to only set marking points without setting peeling mark points, reduces the required width of the dielectric film sheet, and realizes material saving and reduction of hazardous waste.

[0004] To achieve the above purpose, on the one hand, the present invention provides a bar stack device for multi-layer ceramic capacitors, including the following steps:

[0005] Step 1, feeding of the protective film sheet; conveying a protective film roll through a protective film conveying mechanism, the protective film roll including a first base film and a plurality of protective films arranged along the length direction of the first base film, the protective film conveying mechanism cutting the protective films on the protective film roll during conveyance to form protective film sheets, and conveying the protective film sheets to a protective film peeling station;

[0006] Step 2, bottom protective film sheet lamination: The conveying device moves to the protective film peeling station to adsorb the protective film sheet, and then repeats Step 1, so that the next protective film sheet is conveyed to the protective film peeling station. The conveying device then adsorbs the next protective film sheet, and at the same time, the conveying device presses down so that the next protective film sheet adheres to the adsorbed protective film sheet until the number of adsorbed protective film sheets on the conveying device reaches the preset requirement. The conveying device moves all the adsorbed protective film sheets to the lamination stage for pressing;

[0007] Step 3, dielectric film roll feeding: The dielectric film conveying mechanism conveys the dielectric film roll. The dielectric film roll includes a second base film and a plurality of dielectric films arranged along the length direction of the second base film. The dielectric film conveying mechanism cuts the dielectric films on the dielectric film roll during the conveying process to form dielectric film sheets, and conveys the dielectric film sheets to the comparison station; wherein, the dielectric film sheets include a plurality of inner electrode dielectric patterns and a filling area surrounding the inner electrode dielectric patterns, and marking points are provided on the filling area; the distance between two adjacent inner electrode dielectric patterns in two adjacent dielectric film sheets is the first step distance, and the distance between two adjacent inner electrode dielectric patterns along the length direction in the same dielectric film sheet is the second step distance, and the length of the first step distance is greater than the length of the second step distance;

[0008] Step 4, dielectric film sheet lamination;

[0009] 4.1. Input the first step distance parameter into the control center;

[0010] 4.2. The control center records the start of the cycle when the detector on the dielectric film conveying mechanism senses the transition from the inner electrode dielectric pattern to the filling area, and records the end of the cycle when the detector senses the transition from the filling area to the inner electrode dielectric pattern, and records the time of each cycle;

[0011] 4.3. When the control center collects that the current cycle time changes from the previous cycle time, the dielectric film conveying mechanism pauses the operation of the dielectric film roll. The control center calculates the actual running distance of the dielectric film roll in the current cycle according to the running speed of the dielectric film roll and the current cycle time, and the control center compares the actual running distance with the first step distance;

[0012] 4.4. When the difference between the actual running distance and the first step distance is within the allowable error range, the comparison is successful. The dielectric film conveying mechanism continues to convey the dielectric film sheet to the calibration station. The conveying device moves to the calibration station. When the identifier on the conveying device accurately identifies the marking point on the dielectric film sheet, the conveying device adsorbs the dielectric film sheet and moves it to the lamination stage for pressing; when the identifier on the conveying device does not identify the marking point on the dielectric film sheet, the dielectric film conveying mechanism continues to convey the dielectric film roll, and repeats Step 4.3;

[0013] 4.5. Until the number of dielectric diaphragms transferred by the transfer device to the stacking stage reaches the preset requirement;

[0014] Step 5. Stacking of top protective diaphragms: The transfer device moves to the protective film peeling station to adsorb the protective diaphragm, and then repeats Step 1 above, so that the next protective diaphragm is conveyed to the protective film peeling station. The transfer device adsorbs the next protective diaphragm, and at the same time, the transfer device presses down so that the next protective diaphragm adheres to the adsorbed protective diaphragm until the number of adsorbed protective diaphragms on the transfer device reaches the preset requirement. The transfer device transfers all the adsorbed protective diaphragms to the stacking stage for pressing, completing the stacking of the bar blocks.

[0015] As a preferred solution of the present invention, in Step 4.4, when the difference between the actual running distance and the first step distance reaches the preset length, the control center gives an alarm.

[0016] As a preferred solution of the present invention, in Step 4.4, when the number of repetitions of Step 4.3 reaches the set number, the identifier on the transfer device still fails to identify the marking point on the dielectric diaphragm, and the control center gives an alarm.

[0017] On the other hand, the present invention provides a bar block stacking device for a multi-layer ceramic capacitor, which is used to implement the bar block stacking method of the multi-layer ceramic capacitor. The bar block stacking device for the multi-layer ceramic capacitor includes a frame and a transfer device, a stacking stage, a protective film conveying mechanism, and a dielectric film conveying mechanism provided on the frame;

[0018] The protective film conveying mechanism includes a first unwinding roller, a first winding roller, a protective film peeling table, a first vertical cutting assembly, and a first horizontal cutting assembly. One end of the protective film roll is wound around the first unwinding roller, and the other end of the protective film roll is wound around the first winding roller. The protective film peeling table is located between the first unwinding roller and the first winding roller. The first vertical cutting assembly and the first horizontal cutting assembly are located between the first unwinding roller and the protective film peeling table. The first vertical cutting assembly includes a roller rotatably connected to the frame, a vertical cutting bracket arranged above the roller, and two circular knives rotatably connected to the vertical cutting bracket. The two circular knives respectively cut the left and right ends of the protective film on the protective film roll. The first horizontal cutting assembly includes a horizontal cutting base plate, a horizontal cutting bracket, a horizontal cutting knife, and a horizontal cutting driver. The horizontal cutting driver is arranged on the horizontal cutting bracket. The output end of the horizontal cutting driver is connected to the horizontal cutting knife and can drive the horizontal cutting knife to cut the protective film of the protective film roll located on the horizontal cutting base plate. The dielectric film conveying mechanism includes a second unwinding roller, a second winding roller, a dielectric film peeling table, a second vertical cutting assembly, a second horizontal cutting assembly, and a detector. One end of the dielectric film roll is wound around the second unwinding roller, and the other end of the dielectric film roll is wound around the second winding roller. The dielectric film peeling table is located between the second unwinding roller and the second winding roller. The second vertical cutting assembly and the second horizontal cutting assembly are located between the second unwinding roller and the dielectric film peeling table. The second vertical cutting assembly has the same structure as the first vertical cutting assembly, and the second horizontal cutting assembly has the same structure as the first horizontal cutting assembly. The detector detects the protective film of the moving protective film roll and generates a falling edge when sensing the transition from the inner electrode dielectric pattern to the filling area and generates a rising edge when sensing the transition from the filling area to the inner electrode dielectric pattern.

[0019] As a preferred solution of the present invention, the protective film conveying mechanism and the dielectric film conveying mechanism are respectively arranged on both sides of the lamination stage.

[0020] As a preferred solution of the present invention, a telescopic bracket is arranged on the vertical cutting bracket. The telescopic bracket includes a connecting rod and a spring. A fitting hole for slidingly fitting with the connecting rod up and down is arranged on the vertical cutting bracket. A limiting member is arranged in the middle of the connecting rod. The spring is sleeved on the upper section of the connecting rod. The upper end of the spring is connected to the vertical cutting bracket, and the lower end of the spring is connected to the limiting member. The circular knife is rotatably connected to the bottom of the connecting rod.

[0021] As a preferred solution of the present invention, the horizontal cutting driver includes a horizontal cutting driving cylinder and a horizontal cutting guide rail. The output end of the horizontal cutting driving cylinder is connected to the horizontal cutting knife and drives the horizontal cutting knife to move up and down. The horizontal cutting guide rail is connected between the horizontal cutting knife and the horizontal cutting bracket.

[0022] As a preferred embodiment of the present invention, there are two sets of cross-cutting guide rails, which are respectively located on both sides of the cross-cutting driver.

[0023] As a preferred embodiment of the present invention, the top surface of the roller, the top surface of the cross-cutting backing plate, the top surface of the dielectric film peeling table, and the top surface of the protective film peeling table are all on the same plane.

[0024] As a preferred embodiment of the present invention, the roller is a suction roller.

[0025] Compared with the prior art, the beneficial effects of the block laminating device for multi-layer ceramic capacitors in the embodiment of the present invention are as follows:

[0026] In the present invention, the protective film is cut during the conveying process to form protective film pieces, and stacking is performed on the protective film peeling table by cooperating with the adhesion between the protective film pieces, so that the conveying device can adsorb multiple protective film pieces to the laminating stage at the same time, improving the laminating efficiency of the protective film pieces; the dielectric film is cut during the conveying process to form dielectric film pieces. In this way, when the upper dielectric film piece is transferred to the laminating stage for lamination, the lower dielectric film piece can be pre-cut, and the cut dielectric film piece is transferred to the calibration station through the dielectric film peeling table for fiducial point calibration, saving the cutting time of each layer of dielectric film piece and improving the laminating efficiency of the dielectric film pieces; the method for identifying the arrival of the dielectric film piece is optimized, so that the dielectric film piece only needs to be provided with fiducial points without being provided with peeling fiducial points, reducing the required width of the dielectric film piece, realizing material saving and reducing hazardous waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0028] Figure 1 It is a schematic structural diagram of a block laminating device for multi-layer ceramic capacitors provided by the present invention;

[0029] Figure 2 It is a schematic structural diagram of the first vertical cutting assembly provided by the present invention;

[0030] Figure 3 It is a schematic layout diagram of the first cross-cutting assembly provided by the present invention;

[0031] Figure 4 It is a schematic structural diagram of the dielectric film piece provided by the present invention;

[0032] Figure 5 It is a schematic structural diagram of a conventional dielectric film piece;

[0033] In the figure, there are frame 1, conveying device 2, stacking platform 3, protective film conveying mechanism 4, first unwinding roller 41, first winding roller 42, protective film peeling table 43, first vertical cutting assembly 44, roller 441, vertical cutting support 442, circular knife 443, connecting rod 444, spring 445, first horizontal cutting assembly 45, horizontal cutting backing plate 451, horizontal cutting support 452, horizontal cutting knife 453, horizontal cutting driving cylinder 454, horizontal cutting guide rail 455, dielectric film conveying mechanism 5, second unwinding roller 51, second winding roller 52, dielectric film peeling table 53, second vertical cutting assembly 54, second horizontal cutting assembly 55, detector 56, protective film roll 6, protective film sheet 61, dielectric film roll 7, dielectric film sheet 71, inner electrode dielectric pattern 72, marking point 73, marking mark point 74, peeling marking point 75, and first step distance A. Detailed implementation manner

[0034] The following will further describe in detail the specific implementation manner of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] As Figures 1 to 4 shown, a method for laminating the bar of a multi-layer ceramic capacitor according to a preferred embodiment of the present invention includes the following steps:

[0037] Step 1, feeding the protective film sheet; the protective film roll 6 is conveyed through the protective film conveying mechanism 4. The protective film roll 6 includes a first base film and a plurality of protective films arranged along the length direction of the first base film. The protective film conveying mechanism 4 cuts the protective films on the protective film roll 6 during the conveying process to form the protective film sheet 61, and conveys the protective film sheet 61 to the protective film peeling station.

[0038] Step 2, laminating the bottom protective film sheet; the conveying device 2 moves to the protective film peeling station to adsorb the protective film sheet 61, and then repeats Step 1, so that the next protective film sheet 61 is conveyed to the protective film peeling station. The conveying device 2 adsorbs the next protective film sheet 61, and at the same time, the conveying device 2 presses down so that the next protective film sheet 61 adheres to the adsorbed protective film sheet 61 until the number of adsorbed protective film sheets 61 on the conveying device 2 reaches the preset requirement. The conveying device 2 moves all the adsorbed protective film sheets 61 to the stacking platform 3 for pressing.

[0039] Step 3: Feed the dielectric film roll 7; the dielectric film conveying mechanism 5 conveys the dielectric film roll 7. The dielectric film roll 7 includes a second base film and a plurality of dielectric films arranged along the length direction of the second base film. The dielectric film conveying mechanism 5 cuts the dielectric films on the dielectric film roll 7 during conveyance to form dielectric film pieces 71, and conveys the dielectric film pieces 71 to the comparison station. Among them, the dielectric film piece 71 includes a plurality of inner electrode dielectric patterns 72 and a filling area surrounding the inner electrode dielectric patterns 72, and marking points 73 are provided on the filling area. The distance between two adjacent inner electrode dielectric patterns 72 in two adjacent dielectric film pieces 71 is a first step distance A, and the distance between two adjacent inner electrode dielectric patterns 72 along the length direction in the same dielectric film piece 71 is a second step distance, and the length of the first step distance A is greater than the length of the second step distance. It should be noted that the step distance is a length set by the process, so it can ensure that the step distance (the first step distance A) of any two adjacent dielectric film pieces 71 in the entire dielectric film roll 7 is consistent;

[0040] Step 4: Stack the dielectric film pieces;

[0041] 4.1. Input the parameter of the first step distance A into the control center;

[0042] 4.2. The control center records the start of the cycle when the detector 56 on the dielectric film conveying mechanism 5 senses the transition from the inner electrode dielectric pattern 72 to the filling area, and records the end of the cycle when the detector 56 senses the transition from the filling area to the inner electrode dielectric pattern 72, and records the time of each cycle;

[0043] 4.3. When the control center collects that the current cycle time changes from the previous cycle time, the dielectric film conveying mechanism 5 pauses the operation of the dielectric film roll 7. The control center calculates the actual running distance of the dielectric film roll 7 in the current cycle according to the running speed of the dielectric film roll 7 and the current cycle time, and the control center compares the actual running distance with the first step distance A;

[0044] 4.4. When the difference between the actual running distance and the first step distance A is within the allowable error range, the comparison is successful. At this time, the detector 56 is located at the first inner electrode dielectric pattern 72 of the next dielectric film sheet 71 (along the conveying direction of the dielectric film roll 7). The dielectric film conveying mechanism 5 continues to convey the dielectric film sheet 71 to the calibration station, and the transfer device 2 moves to the calibration station. When the identifier on the transfer device 2 accurately identifies the marking point 73 on the dielectric film sheet 71, the transfer device 2 adsorbs the dielectric film sheet 71 and transfers it to the stacking stage 3 for pressing; when the identifier on the transfer device 2 fails to identify the marking point 73 on the dielectric film sheet 71, the control center determines that the inner electrode dielectric pattern 72 in the dielectric film sheet 71 is damaged, resulting in the internal damage width in the middle of the inner electrode dielectric pattern 72 being the same as the first step distance A, or the edge damage width of the inner electrode dielectric pattern 72 combined with the second step distance achieving the same as the first step distance A, thus causing misidentification. Then, the dielectric film conveying mechanism 5 continues to convey the dielectric film roll 7 and repeats step 4.3 to effectively prevent a series of quality problems such as damage to the inner electrode dielectric pattern 72 from occurring;

[0045] 4.5. Until the number of dielectric film sheets 71 transferred by the transfer device 2 to the stacking stage 3 reaches the preset requirement;

[0046] Step 5. Stacking of the top protective film sheets; The transfer device 2 moves to the protective film peeling station to adsorb the protective film sheet 61, and then repeats the above step 1, so that the next protective film sheet 61 is conveyed to the protective film peeling station. The transfer device 2 adsorbs the next protective film sheet 61, and at the same time, the transfer device 2 presses down to make the next protective film sheet 61 adhere to the already adsorbed protective film sheet 61 until the number of adsorbed protective film sheets 61 on the transfer device 2 reaches the preset requirement. The transfer device 2 transfers all the adsorbed protective film sheets 61 to the stacking stage 3 for pressing to complete the stacking of the bar blocks.

[0047] Exemplarily, in the above step 4.4, when the difference between the actual running distance and the first step distance A reaches the preset length, the control center gives an alarm to remind the operator to check the equipment and the dielectric film roll 7.

[0048] Further, in the above step 4.4, when the number of repetitions of step 4.3 reaches the set number and the identifier on the transfer device 2 still fails to identify the marking point 73 on the dielectric film sheet 71, the control center gives an alarm to remind the operator to check the equipment and the dielectric film roll 7 to avoid misjudgment.

[0049] In addition, the present invention also discloses a bar block laminating device for a multi-layer ceramic capacitor, which is used to implement the bar block laminating method of the multi-layer ceramic capacitor. The bar block laminating device for the multi-layer ceramic capacitor includes a frame 1 (the complete frame is not shown in the figure), and a conveying device 2, a laminating stage 3, a protective film conveying mechanism 4, and a dielectric film conveying mechanism 5 arranged on the frame 1;

[0050] The protective film conveying mechanism 4 includes a first unwinding roller 41, a first winding roller 42, a protective film peeling table 43, a first vertical cutting assembly 44 and a first horizontal cutting assembly 45. One end of the protective film roll 6 is wound around the first unwinding roller 41, and the other end of the protective film roll 6 is wound around the first winding roller 42. The protective film peeling table 43 is located between the first unwinding roller 41 and the first winding roller 42. The first vertical cutting assembly 44 and the first horizontal cutting assembly 45 are located between the first unwinding roller 41 and the protective film peeling table 43. The first vertical cutting assembly 44 includes a drum 441 rotatably connected to the frame 1, a vertical cutting support 442 disposed above the drum 441, and two circular knives 443 rotatably connected to the vertical cutting support 442. The two circular knives 443 respectively cut the left and right ends of the protective film on the protective film roll 6. The circular knives 443 are in contact with the drum 441 through the protective film roll 6 (dielectric film roll 7). In this embodiment, the drum 441 is preferably a suction drum 441 to prevent the protective film roll 6 and the dielectric film roll 7 from shifting. The first horizontal cutting assembly 45 includes a horizontal cutting base plate 451, a horizontal cutting support 452, a horizontal cutting knife 453 and a horizontal cutting driver. The horizontal cutting driver is disposed on the horizontal cutting support 452. The output end of the horizontal cutting driver is connected to the horizontal cutting knife 453 and can drive the horizontal cutting knife 453 to cut the protective film of the protective film roll 6 located on the horizontal cutting base plate 451 to form a protective film sheet 61. The protective film peeling table 43 transfers the protective film sheet 61 to the protective film peeling station, enabling the transfer device 2 to adsorb the protective film sheet 61 at the protective film peeling station. The protective film peeling table 43 moves back and forth in the conveying direction of the protective film sheet 61. The dielectric film conveying mechanism 5 includes a second unwinding roller 51, a second winding roller 52, a dielectric film peeling table 53, a second vertical cutting assembly 54, a second horizontal cutting assembly 55 and a detector 56. One end of the dielectric film roll 7 is wound around the second unwinding roller 51, and the other end of the dielectric film roll 7 is wound around the second winding roller 52. The dielectric film peeling table 53 is located between the second unwinding roller 51 and the second winding roller 52. The second vertical cutting assembly 54 and the second horizontal cutting assembly 55 are located between the second unwinding roller 51 and the dielectric film peeling table 53. The second vertical cutting assembly 54 has the same structure as the first vertical cutting assembly 44. The two circular knives 443 of the second vertical cutting assembly 54 respectively cut the left and right ends of the dielectric film on the dielectric film roll 7. The second horizontal cutting assembly 55 has the same structure as the first horizontal cutting assembly 45. The horizontal cutting knife 453 of the second horizontal cutting assembly 55 cuts the dielectric film of the dielectric film roll 7 to form a dielectric film sheet 71. The detector 56 detects the protective film of the moving protective film roll 6 and generates a falling edge when sensing the transition from the inner electrode dielectric pattern 72 to the filling area and a rising edge when sensing the transition from the filling area to the inner electrode dielectric pattern 72.The dielectric film stripping table 53 transfers the dielectric film sheet 71 to the comparison station for comparison. After successful comparison, the dielectric film stripping table 53 transfers the initially qualified dielectric film sheet 71 to the calibration station. After successful calibration, the conveying device 2 adsorbs the dielectric film sheet 71 at the calibration station, and the dielectric film stripping table 53 moves back and forth in the conveying direction of the protective film sheet 61. Among them, the conveying device 2, the stacking stage 3, the protective film stripping table 43, and the dielectric film stripping table 53 are of existing structures and will not be repeated here.

[0051] Exemplarily, the protective film conveying mechanism 4 and the dielectric film conveying mechanism 5 are respectively arranged on both sides of the stacking stage 3, which is convenient for the conveying device 2 to transfer the protective film sheet 61 and the dielectric film sheet 71 to the stacking stage 3 respectively, improving the transfer efficiency.

[0052] Exemplarily, a telescopic bracket is provided on the vertical cutting bracket 442. The telescopic bracket includes a connecting rod 444 and a spring 445. A fitting hole for slidingly fitting with the connecting rod 444 up and down is provided on the vertical cutting bracket 442. A limiting member is provided in the middle of the connecting rod 444. The spring 445 is sleeved on the upper section of the connecting rod 444. The upper end of the spring 445 is connected to the vertical cutting bracket 442, and the lower end of the spring 445 is connected to the limiting member. The circular knife 443 is rotatably connected to the bottom of the connecting rod 444, ensuring that the circular knife 443 does not cut the first base film (PET film) and the second base film (PET film) while cutting the protective film and the dielectric film.

[0053] Exemplarily, the transverse cutting driver includes a transverse cutting drive cylinder 454 and a transverse cutting guide rail 455. The output end of the transverse cutting drive cylinder 454 is connected to the transverse cutting knife 453 and drives the transverse cutting knife 453 to move up and down. The transverse cutting guide rail 455 is connected between the transverse cutting knife 453 and the transverse cutting bracket 452. Further, there are two groups of the transverse cutting guide rails 455, which are respectively located on both sides of the transverse cutting driver, improving the stability of the transverse cutting knife 453 when cutting the front and rear ends of the protective film sheet 61 and the front and rear ends of the dielectric film sheet 71.

[0054] Exemplarily, the top surface of the roller 441, the top surface of the transverse cutting backing plate 451, the top surface of the dielectric film stripping table 53, and the top surface of the protective film stripping table 43 are all on the same plane, which is convenient for the conveying device 2 to operate, and at the same time ensures high accuracy of the detection by the detector 56 and avoids errors.

[0055] In summary, in the present invention, the protective film is cut during the conveying process to form the protective film pieces 61, and stacking is performed on the protective film peeling table 43 in cooperation with the adhesion between the protective film pieces 61, so that the conveying device 2 can adsorb multiple protective film pieces 61 to the lamination stage 3 at the same time, improving the lamination efficiency of the protective film pieces 61; the dielectric film is cut during the conveying process to form the dielectric film pieces 71. In this way, when the upper dielectric film piece 71 is transferred to the lamination stage 3 for lamination, the lower dielectric film piece 71 can be cut in advance, and the cut dielectric film pieces 71 are transferred to the calibration station through the dielectric film peeling table 53 for calibration of the marking points 73, saving the cutting time of each dielectric film piece 71 and improving the lamination efficiency of the dielectric film pieces 71; the method for identifying the arrival of the dielectric film pieces 71 is optimized, so that the dielectric film pieces 71 only need to be provided with marking points 73 without being provided with peeling marking points, reducing the required width of the dielectric film pieces 71, achieving material saving and reduction of hazardous waste.

[0056] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A method for stacking blocks of a multi-layer ceramic capacitor, characterized in that, It includes the following steps: Step 1, feeding the protective film sheet; feeding the protective film roll through the protective film conveying mechanism. The protective film roll includes a first base film and a plurality of protective films arranged along the length direction of the first base film. The protective film conveying mechanism cuts the protective film on the protective film roll during the conveying process to form a protective film sheet, and conveys the protective film sheet to the protective film peeling station; Step 2, stacking the bottom protective film sheets; the conveying device moves to the protective film peeling station to adsorb the protective film sheet, and then repeats Step 1, so that the next protective film sheet is conveyed to the protective film peeling station. The conveying device adsorbs the next protective film sheet, and at the same time, the conveying device presses down so that the next protective film sheet adheres to the adsorbed protective film sheet until the number of adsorbed protective film sheets on the conveying device reaches the preset requirement. The conveying device moves all the adsorbed protective film sheets to the stacking platform for pressing; Step 3, feeding the dielectric film roll; the dielectric film conveying mechanism conveys the dielectric film roll. The dielectric film roll includes a second base film and a plurality of dielectric films arranged along the length direction of the second base film. The dielectric film conveying mechanism cuts the dielectric film on the dielectric film roll during the conveying process to form a dielectric film sheet, and conveys the dielectric film sheet to the comparison station; wherein, the dielectric film sheet includes a plurality of inner electrode dielectric patterns and a filling area surrounding the inner electrode dielectric patterns, and marking points are provided on the filling area; the distance between two adjacent inner electrode dielectric patterns in two adjacent dielectric film sheets is a first step distance, and the distance between two adjacent inner electrode dielectric patterns along the length direction in the same dielectric film sheet is a second step distance, and the length of the first step distance is greater than the length of the second step distance; Step 4, stacking the dielectric film sheets; 4.1, inputting the first step distance parameter to the control center; 4.2, the control center records the start point of the cycle when the detector on the dielectric film conveying mechanism senses the transition from the inner electrode dielectric pattern to the filling area, and records the end point of the cycle when the detector senses the transition from the filling area to the inner electrode dielectric pattern, and records the time of each cycle; 4.3, when the control center collects that the current cycle time changes compared with the previous cycle time, the dielectric film conveying mechanism pauses the operation of the dielectric film roll. The control center calculates the actual running distance of the dielectric film roll in the current cycle according to the running speed of the dielectric film roll and the current cycle time, and the control center compares the actual running distance with the first step distance; 4.4, when the difference between the actual running distance and the first step distance is within the allowable error range, the comparison is successful. The dielectric film conveying mechanism continues to convey the dielectric film sheet to the calibration station. The conveying device moves to the calibration station. When the identifier on the conveying device accurately identifies the marking point on the dielectric film sheet, the conveying device adsorbs the dielectric film sheet and moves it to the stacking platform for pressing; when the identifier on the conveying device does not identify the marking point on the dielectric film sheet, the dielectric film conveying mechanism continues to convey the dielectric film roll, and repeats Step 4.3; 4.5, until the number of dielectric film sheets transferred by the conveying device to the stacking platform reaches the preset requirement; Step 5: Stacking the top protective film sheets; The conveying device moves to the protective film peeling station to adsorb the protective film sheets, and then repeats Step 1 above, so that the next protective film sheet is conveyed to the protective film peeling station. The conveying device adsorbs the next protective film sheet, and at the same time, the conveying device presses down so that the next protective film sheet adheres to the adsorbed protective film sheet until the number of adsorbed protective film sheets on the conveying device reaches the preset requirement. The conveying device moves all the adsorbed protective film sheets to the stacking stage for pressing, completing the stacking of the bar blocks.

2. The method for laminating the bar-shaped layers of the multilayer ceramic capacitor according to claim 1, characterized in that, In Step 4.4, when the difference between the actual running distance and the first step distance reaches the preset length, the control center gives an alarm.

3. The method for laminating the bar blocks of the multi-layer ceramic capacitor according to claim 1, characterized in that, In Step 4.4, when the number of repetitions of Step 4.3 reaches the set number, and the identifier on the conveying device still fails to identify the marking point on the dielectric film sheet, the control center gives an alarm.

4. A bar block laminating device for a multilayer ceramic capacitor, characterized in that, A method for stacking bar blocks of a multi-layer ceramic capacitor, which is used to implement the method for stacking bar blocks of a multi-layer ceramic capacitor according to any one of claims 1 to 3. The bar block stacking device of the multi-layer ceramic capacitor includes a frame and a conveying device, a stacking stage, a protective film conveying mechanism, and a dielectric film conveying mechanism provided on the frame; The protective film conveying mechanism includes a first unwinding roller, a first rewinding roller, a protective film peeling table, a first vertical cutting assembly, and a first horizontal cutting assembly. The first unwinding roller winds one end of the protective film roll, and the first rewinding roller winds the other end of the protective film roll. The protective film peeling table is located between the first unwinding roller and the first rewinding roller. The first vertical cutting assembly and the first horizontal cutting assembly are located between the first unwinding roller and the protective film peeling table. The first vertical cutting assembly includes a roller rotatably connected to the frame, a vertical cutting bracket provided above the roller, and two circular knives rotatably connected to the vertical cutting bracket. The two circular knives respectively cut the left and right ends of the protective film on the protective film roll. The first horizontal cutting assembly includes a transverse cutting base plate, a transverse cutting bracket, a transverse cutting knife, and a transverse cutting driver. The transverse cutting driver is provided on the transverse cutting bracket, and the output end of the transverse cutting driver is connected to the transverse cutting knife and can drive the transverse cutting knife to cut the protective film of the protective film roll located on the transverse cutting base plate. The dielectric film conveying mechanism includes a second unwinding roller, a second rewinding roller, a dielectric film peeling table, a second vertical cutting assembly, a second horizontal cutting assembly, and a detector. The second unwinding roller winds one end of the dielectric film roll, and the second rewinding roller winds the other end of the dielectric film roll. The dielectric film peeling table is located between the second unwinding roller and the second rewinding roller. The second vertical cutting assembly and the second horizontal cutting assembly are located between the second unwinding roller and the dielectric film peeling table. The second vertical cutting assembly has the same structure as the first vertical cutting assembly, and the second horizontal cutting assembly has the same structure as the first horizontal cutting assembly. The detector detects the protective film of the moving protective film roll and generates a falling edge when sensing the transition from the inner electrode dielectric pattern to the filling area and generates a rising edge when sensing the transition from the filling area to the inner electrode dielectric pattern.

5. The bar stack device of the multilayer ceramic capacitor according to claim 4, characterized in that, The protective film conveying mechanism and the medium film conveying mechanism are respectively arranged on both sides of the lamination stage.

6. The bar stack device for a multilayer ceramic capacitor according to claim 4, characterized in that, A telescopic bracket is provided on the vertical cutting bracket. The telescopic bracket includes a connecting rod and a spring. A fitting hole for vertically slidingly fitting with the connecting rod is provided on the vertical cutting bracket. A limiting member is provided in the middle of the connecting rod. The spring is sleeved on the upper section of the connecting rod. The upper end of the spring is connected to the vertical cutting bracket, and the lower end of the spring is connected to the limiting member. The circular knife is rotatably connected to the bottom of the connecting rod.

7. The bar stack device for a multilayer ceramic capacitor according to claim 4, characterized in that, The transverse cutting driver includes a transverse cutting drive cylinder and a transverse cutting guide rail. The output end of the transverse cutting drive cylinder is connected to the transverse cutting knife and drives the transverse cutting knife to move up and down. The transverse cutting guide rail is connected between the transverse cutting knife and the transverse cutting bracket.

8. The block stacking device for the multilayer ceramic capacitor according to claim 7, characterized in that, There are two groups of the transverse cutting guide rails, which are respectively located on both sides of the transverse cutting driver.

9. The bar block stacking device for the multi-layer ceramic capacitor according to claim 4, characterized in that, The top surfaces of the roller, the transverse cutting backing plate, the medium film peeling table, and the protective film peeling table are all in the same plane.

10. The bar block stacking device for the multi-layer ceramic capacitor according to claim 4, characterized in that, The roller is a suction roller.

Images