A conductive silver paste printing device suitable for various types of thin film sensors

Abstract

The present invention discloses a conductive silver paste printing device suitable for various types of thin film sensors, comprising a base, a partition, and a semi-enclosed shell, wherein the top of the base is fixedly mounted to the bottom edge of the partition. The present invention realizes that when an inner insert rod a and an inner insert rod b are displaced toward each other along a slide groove, two sets of connecting rods a and connecting rods b between the two sets respectively drive two push rods to deflect inward, thereby pushing two extrusion rods to displace toward each other, so that the rectangular space enclosed by the connecting rods a, connecting rod b, inner insert rod a, and inner insert rod b gradually decreases. Furthermore, a slurry collecting scraper and a combined scraper at the inner bottom push inward the rectangular protrusions formed on the upper surface of the screen printing medium due to the accumulation of conductive silver paste, thereby remixing the new and old conductive silver pastes, accelerating the utilization of the conductive silver paste added earlier, preventing the conductive silver paste from being exposed to oxygen in the external environment for a long time, reducing the content of oxidized silver, thereby improving the slurry dispersion rate and ensuring printing quality.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, in particular to a conductive silver paste printing device suitable for various types of thin film sensors. Background Art

[0002] The piezoelectric film sensor consists of a rectangular piezoelectric film element connected to a plastic housing and a coaxial cable. The film element is screen-printed with conductive silver paste on both the top and bottom layers, then folded in half to create a self-shielded operating area, enabling the product to be used in high-EMI environments. The conductive silver paste screen-printed on the film element's surface is made from a blend of ultrafine silver powder and low-temperature curing thermoplastic resin. It exhibits excellent printability, conductivity, oxidation resistance, hardness, and strong adhesion.

[0003] Silver paste printing needs to go through three stages from pouring out of the silver paste tank to finally printing on the substrate to form a film: the first is transfer, which refers to the transfer of the silver paste from the silver paste tank to the screen printing screen; the second is printing, which refers to the silver paste passing through the mesh under the action of the scraper and being distributed on the substrate in the form of ink dots according to the distribution of the mesh holes on the screen; the third is film formation, which refers to the silver paste printed on the substrate being leveled and forming a film under the action of gravity.

[0004] In the prior art, Chinese patent application CN108770237A discloses a printer for silver paste through-holes on PCB boards. The key points of its technical solution are: it includes a workbench, a lifting frame arranged on the workbench, a screen installed on the lifting frame, and a controller for controlling the lifting of the lifting frame. The workbench located below the screen is provided with a pad for placing the circuit board, the workbench is provided with a cleaning brush for cleaning the pad, and the workbench is provided with a driving device for driving the cleaning brush to move back and forth along the surface of the pad for cleaning. The driving device is electrically connected to the controller for controlling the operation of the driving device. The lifting frame and the driving device work asynchronously, which has the advantage of reducing the occurrence of pad contamination.

[0005] However, in the prior art, a screen printing machine usually includes a screen and a slurry scraper. The slurry scraper scrapes the conductive silver paste from one side of the printing area to the other side, and the conductive silver paste is printed on the component to be printed through the screen. In the process of the slurry scraper scraping back and forth, the conductive silver paste on the outside will be pushed by the scraper, and a rectangular silver paste gathering bulge will be formed on the upper surface of the screen at the edge of the scraper's movement range. The outer side of the bulge formed by the silver paste gathering cannot be pushed back to the screen printing area for utilization by the slurry scraper scraping back and forth. When exposed to the air of the external environment for a long time, the conductive silver paste will not only be dried to a certain extent, but the silver inside it will also undergo oxidation reaction with the oxygen in the air to form brown-black powder silver oxide, which makes the slurry poorly dispersed, resulting in the problem of paint film granulation and black color after it is subsequently printed, which greatly affects the printing quality. In addition, the scraping effect is poor and the scraper efficiency is low due to the one-way reciprocating scraper. Summary of the Invention

[0006] The purpose of the present invention is to provide a conductive silver paste printing device suitable for various types of thin film sensors, so as to solve the problem proposed in the above background technology that the screen printing machine usually includes a screen and a paste scraper. The paste scraper scrapes the conductive silver paste from one side of the printing area to the other side, and the conductive silver paste is printed on the component to be printed through the screen. In the process of the paste scraper scraping back and forth, the conductive silver paste on the outside will be pushed by the scraper, and a rectangular silver paste gathering bulge will be formed on the upper surface of the screen at the edge of the scraper's movement range. The outside of the bulge formed by the silver paste gathering cannot be pushed to the screen printing area for use again by the reciprocating paste scraper. When exposed to the air of the external environment for a long time, the conductive silver paste will not only be dried to a certain extent, but the silver inside it will also undergo oxidation reaction with the oxygen in the air to form brown-black powder silver oxide, which makes the paste poorly dispersed, resulting in the problem of paint film granulation and black color after it is subsequently printed.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a conductive silver paste printing device suitable for various types of thin film sensors, comprising a base, a partition, and a semi-enclosed shell, wherein the top of the base is fixedly mounted to the bottom edge of the partition, and the top edge of the partition is fixedly mounted to the bottom edge of the semi-enclosed shell, a double-layer reciprocating workbench is movably mounted on the top of one end of the partition, and a printing device is movably mounted on the top of the other end of the partition, a clamping screen is movably clamped on the inner side of the bottom of the printing device, and a slurry pushing assembly is movably mounted on the inner side of the clamping screen;

[0008] The printing device includes a longitudinal adjustment seat, a transverse adjustment rod, and a transfer rod. One end of the longitudinal adjustment seat is movably mounted on one end of the transverse adjustment rod, and the other end of the transverse adjustment rod is fixedly mounted on one end of the transfer rod. Two pneumatic telescopic rods a are fixedly mounted on the top of the other end of the transfer rod, and a lifting frame a is fixedly mounted on the top of the two pneumatic telescopic rods a. A back-slurry scraper is fixedly mounted on the bottom end of one of the lifting frames a, and a scraper is fixedly mounted on the bottom end of the other lifting frame a.

[0009] The pushing assembly includes two extrusion rods, the inner sides of the two extrusion rods are penetrated by a sliding groove, an inner plug rod a is slidably installed between one end of the two sliding grooves, and an inner plug rod b is slidably installed between the other ends of the two sliding grooves, two connecting rods a are movably installed at both ends of the inner plug rod a, and two connecting rods b are movably installed at both ends of the inner plug rod b, a pushing rod is movably installed between the two groups of the connecting rods a and the connecting rods b, one end of the two pushing rods is fixedly installed on one side of the two extrusion rods, and a slurry scraper is fixedly installed on the bottom of the two extrusion rods, a telescopic groove is penetrated on the inner sides of the inner plug rod a and the inner plug rod b, and a combined scraper is movably installed on the inner side of the telescopic groove.

[0010] Preferably, the combined scraper includes a plurality of card blocks, the bottom of each card block is movably plugged into the bottom of the telescopic slot, and an insert block is movably plugged between every two card blocks, and the bottom end of each insert block is movably plugged into the bottom of the telescopic slot, and a push plate is fixedly installed on the bottom end of each insert block and card block.

[0011] Preferably, a double-threaded screw rod is movably connected between the tops of the inner insert rod a and the inner insert rod b, and two sets of reverse threads are opened on the outer side of the double-threaded screw rod, and a rotating motor is installed at one end of the double-threaded screw rod.

[0012] Preferably, the clamping screen plate includes an outer frame and a silk-screen screen, and the inner side of the bottom of the outer frame is fixedly mounted to the outer side of the silk-screen screen.

[0013] Preferably, a limiting rod is fixedly mounted on the inner side of one end of the outer frame, and the bottom of the limiting rod is fixedly mounted on the outer side of the top of the rotating motor.

[0014] Preferably, two clamping rods are fixedly installed on both sides of the lateral adjustment rod, and pneumatic telescopic rods b are movably installed on the top of the two clamping rods, and lifting frames b are fixedly installed on the top of the two pneumatic telescopic rods b, two fixing rods are symmetrically fixedly installed between the bottom ends of the two lifting frames b, and two grooved steels are symmetrically and movably installed between the two fixing rods, the tops of the two grooved steels are threadedly connected with fastening bolts, and the bottoms of the fastening bolts are movably engaged with the top of the outer frame.

[0015] Preferably, a transmission belt is movably mounted on the inner side of the transverse adjustment rod, and a driving motor is mounted on the inner side of one end of the transmission belt, and one side of the transmission belt is fixedly mounted to one end of the transfer rod.

[0016] Preferably, two guide rails are symmetrically fixedly installed on the inner side of the longitudinal adjustment seat, and a sliding rod is movably installed between the two guide rails. One end of the sliding rod is fixedly installed on the outer side of the transverse adjustment rod, and a lifting screw rod is movably inserted at the central axis of the sliding rod, and a screw motor is connected to the bottom of the lifting screw rod.

[0017] Preferably, the double-layer reciprocating workbench includes two limit rails, the bottom of the two limit rails are fixedly installed on the top of the partition, a bottom workbench is movably installed between the bottoms of the two limit rails, and a top workbench is movably installed between the tops of the two limit rails, a controllable pneumatic rod a is installed at one end of the bottom workbench, and a controllable pneumatic rod b is installed at one end of the top workbench.

[0018] Preferably, a plurality of through holes are evenly opened on the inner sides of the top workbench and the bottom workbench, an air guide port is fixedly installed at the bottom of one end of the partition, and the bottom end of the air guide port is connected to an air pump.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the rotary motor drives the double-threaded screw to rotate forward after being turned on. Since the two sets of threads on the outer surface of the double-threaded screw are set in opposite directions, when it rotates, the inner rod a and the inner rod b will be displaced toward each other along the slide groove, thereby driving the two push rods to deflect inward through the two sets of connecting rods a and connecting rod b therebetween, and then pushing the two extrusion rods to displace toward each other along the inner rod a and inner rod b, so that the rectangular space surrounded by the connecting rods a, connecting rod b, inner rod a and inner rod b gradually decreases, and through the slurry collecting scraper and combined scraper at the bottom of the inner side, the rectangular protrusion formed on the upper surface of the screen printing net due to the accumulation of conductive silver paste is pushed inward, so that the new and old conductive silver pastes are mixed again, thereby accelerating the utilization of the conductive silver paste added in the early stage, avoiding the conductive silver paste from being exposed to oxygen in the external environment for a long time, reducing the content of silver oxide, thereby improving the slurry dispersion rate and ensuring printing quality.

[0021] 2. In the present invention, the top workbench and the bottom workbench are alternately moved to the bottom of the clamped screen and the printing device to print the silver material, thereby saving the time required for unloading and loading the material after printing a film, and can print continuously, thereby improving the printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a schematic structural diagram of a conductive silver paste printing device suitable for various types of thin film sensors according to the present invention;

[0023] Figure 2 This is a front structural schematic diagram of a printing device of a conductive silver paste printing device applicable to various types of thin film sensors of the present invention;

[0024] Figure 3 This is a schematic diagram of the back structure of a printing device of a conductive silver paste printing device applicable to various types of thin film sensors of the present invention;

[0025] Figure 4 This is a structural schematic diagram of a clamped screen plate of a conductive silver paste printing device applicable to various types of thin film sensors of the present invention;

[0026] Figure 5 This is a structural schematic diagram of a paste pushing assembly of a conductive silver paste printing device applicable to various types of thin film sensors of the present invention;

[0027] Figure 6 This is a schematic structural diagram of a combined scraper of a conductive silver paste printing device applicable to various types of thin film sensors of the present invention;

[0028] Figure 7 for Figure 4 A is an enlarged schematic diagram;

[0029] Figure 8 This is a structural schematic diagram of a double-layer reciprocating workbench of a conductive silver paste printing device suitable for various types of thin film sensors of the present invention;

[0030] Figure 9 The present invention is a structural schematic diagram of an air guide port of a conductive silver paste printing device suitable for various types of thin film sensors.

[0031] In the picture:

[0032] 1. Base; 10. Partition; 101. Air guide port; 102. Air pump;

[0033] 2. Semi-enclosed shell;

[0034] 3. Double-layer reciprocating workbench; 30. Limit rail; 31. Top workbench; 310. Controllable pneumatic rod b; 32. Bottom workbench; 320. Controllable pneumatic rod a; 321. Through hole;

[0035] 4. Printing device; 40. Longitudinal adjustment seat; 401. Guide rail; 402. Slide rod; 403. Lifting screw; 404. Screw motor; 41. Horizontal adjustment rod; 410. Drive motor; 411. Transmission belt; 42. Clamping rod; 43. Adapter rod; 430. Pneumatic telescopic rod a; 431. Lifting frame a; 432. Backslurry scraper; 433. Squeegee; 44. Pneumatic telescopic rod b; 440. Lifting frame b; 46. Fixing rod; 47. Grooved steel; 470. Fastening bolts;

[0036] 5. Clamping screen; 50. Outer frame; 501. Limit rod; 51. Silk screen screen;

[0037] 6. Pushing slurry assembly; 60. Extrusion rod; 601. Slide; 602. Slurry collecting scraper; 61. Insert rod a; 610. Telescopic slot; 62. Combined scraper; 620. Insert block; 621. Block; 622. Push plate; 63. Pushing rod; 64. Connecting rod b; 640. Connecting rod a; 65. Insert rod b; 66. Double-threaded screw; 67. Rotating motor. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown: A conductive silver paste printing device suitable for various types of thin film sensors, including a base 1, a partition 10, and a semi-enclosed shell 2. The top of the base 1 is fixedly installed with the bottom edge of the partition 10, and the top edge of the partition 10 is fixedly installed with the bottom edge of the semi-enclosed shell 2. A double-layer reciprocating workbench 3 is movably installed on the top of one end of the partition 10, and a printing device 4 is movably installed on the top of the other end of the partition 10. The bottom inner side of the printing device 4 is movably connected with a clamping screen 5; the double-layer reciprocating workbench 3 includes two limit rails 30, the bottoms of the two limit rails 30 are fixedly installed with the top of the partition 10, a bottom workbench 32 is movably installed between the bottoms of the two limit rails 30, and a top workbench 31 is movably installed between the tops of the two limit rails 30, one end of the bottom workbench 32 is installed with a controllable pneumatic rod a320, and one end of the top workbench 31 is installed with a controllable pneumatic rod b310.

[0040] When using this device, two films can be placed on the upper surfaces of the top workbench 31 and the bottom workbench 32 of the double-layer reciprocating workbench 3, respectively. The top workbench 31 will be pulled by the length contraction of the controllable pneumatic rod b310, carrying the film to the printing device 4 and the clamping screen 5 for screen printing. When the film on the upper surface of the top workbench 31 is screen printed, the controllable pneumatic rod b310 is extended, and the top workbench 31 carrying the printed film is displaced along the top of the two limit rails 30 toward the outside of the semi-enclosed shell 2. At the same time, the controllable pneumatic rod a320 is extended, pushing the bottom workbench 32 carrying the film on its top to move along the two limit rails 30 toward the printing device 4 and the clamping screen 5 on the inner side of the semi-enclosed shell 2 for screen printing. Through the cyclic operation of the top workbench 31 and the bottom workbench 32 of the double-layer reciprocating workbench 3, continuous film printing and loading and unloading can be performed.

[0041] A clamping screen 5 is movably mounted on the inner side of the bottom of the printing device 4, and a slurry pusher assembly 6 is movably mounted on the inner side of the clamping screen 5. The clamping screen 5 includes an outer frame 50 and a screen printing screen 51. The inner side of the bottom of the outer frame 50 is fixedly mounted to the outer side of the screen printing screen 51. Conductive silver material is poured onto the upper surface of the screen printing screen 51 within the outer frame 50. The inner side of the screen printing screen 51 has holes formed on it according to the pattern to be formed by the conductive silver paste. When the squeegee 433 of the printing device 4 scrapes the conductive silver paste onto the upper surface of the holes, the conductive silver paste is squeezed out due to its own gravity and the downward pressure of the squeegee 433, and printed onto the upper surface of the film at the bottom of the screen printing screen 51.

[0042] The printing device 4 includes a longitudinal adjustment seat 40, a transverse adjustment rod 41, and a transfer rod 43. One end of the longitudinal adjustment seat 40 is movably installed with one end of the transverse adjustment rod 41, and the other end of the transverse adjustment rod 41 is fixedly installed with one end of the transfer rod 43. A transmission belt 411 is movably installed on the inner side of the transverse adjustment rod 41, and a driving motor 410 is installed on the inner side of one end of the transmission belt 411. A driving wheel is fixedly installed on the output end of the driving motor 410, and the driving wheel is abutted against the transmission belt 411. When the driving wheel is driven to rotate by the driving motor 410, it can drive the transmission belt 411 to move. One side of the transmission belt 411 is fixedly installed with one end of the transfer rod 43, and two pneumatic telescopic rods a430 are fixedly installed on the top of the other end of the transfer rod 43, and a lifting frame a431 is fixedly installed on the top of the two pneumatic telescopic rods a430. The bottom end of one lifting frame a431 is fixedly installed with a back-slurry scraper 432, and the bottom end of the other lifting frame a431 is fixedly installed with a scraper plate 433.

[0043] When it is necessary to print the film directly below the clamped screen 5, the drive motor 410 is started and drives the lateral adjustment rod 41, the transfer rod 43 and the back-paste scraper 432 and the scraper plate 433 at the bottom thereof to perform lateral displacement through the transmission belt 411. First, the two lifting frames a431 and the back-paste scraper 432 at the bottom thereof, which are respectively controlled by the two pneumatic telescopic rods a430, contact the upper surface of the silk-screen mesh 51, and the scraper plate 433 is at a higher height and does not contact the upper surface of the silk-screen mesh 51. At this time, when the lateral adjustment rod 41 is displaced to one side, the back-paste scraper 432 will scrape the conductive silver material on the other side of the silk-screen mesh 51 to one side of the silk-screen mesh 51, so that the conductive silver material covers the upper surface of the silk-screen mesh 51 containing pattern holes. Next, when the lateral adjustment rod 41 moves to the other side, the two lifting frames a431 and the back-paste scraper 432 at the bottom, which are respectively controlled by the two pneumatic telescopic rods a430, are lifted to separate them from the upper surface of the silk-screen mesh 51, and the scraper plate 433 is lowered in height and squeezed against the upper surface of the silk-screen mesh 51. When the scraper plate 433 moves to the other side of the silk-screen mesh 51, it will squeeze the conductive silver material on the upper surface of the silk-screen mesh 51 downward, so that the conductive silver material passes through the holes in the silk-screen mesh 51 and is printed on the upper surface of the film at the bottom.

[0044] Reference Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown: the pusher assembly 6 includes two extrusion rods 60, and the inner sides of the two extrusion rods 60 are penetrated by a slide groove 601, an inner plug rod a61 is slidably installed between one end of the two slide grooves 601, and an inner plug rod b65 is slidably installed between the other ends of the two slide grooves 601, two connecting rods a640 are movably installed at both ends of the inner plug rod a61, two connecting rods b64 are movably installed at both ends of the inner plug rod b65, and a push rod 63 is movably installed between the two groups of connecting rods a640 and the connecting rod b64. One end of the two push rods 63 is fixedly installed on one side of the two extrusion rods 60 respectively. The bottom of the two extrusion rods 60 are fixedly installed with a slurry scraper 602, and a double-threaded screw rod 66 is movably inserted between the top of the inner rod a61 and the inner rod b65, and two sets of reverse threads are provided on the outside of the double-threaded screw rod 66. A rotating motor 67 is installed at one end of the double-threaded screw rod 66, and a limiting rod 501 is fixedly installed on the inner side of one end of the outer frame 50, and the bottom of the limiting rod 501 is fixedly installed on the outer side of the top of the rotating motor 67. The inner sides of the inner rod a61 and the inner rod b65 are penetrated by a telescopic groove 610, and the inner side of the telescopic groove 610 is movably installed with a combined scraper 62.

[0045] The overall inner diameter of the pushing assembly 6 will shrink, and the edges of the movement range of the return scraper 432 and the scraper 433, and the rectangular protrusions formed on the upper surface of the screen printing mesh 51 due to the accumulation of conductive silver paste, will be pushed inwards to mix the old and new conductive silver pastes again, thereby accelerating the utilization of the conductive silver paste added in the early stage and avoiding the long-term exposure of the conductive silver paste in the external environment to the oxygen of the above-mentioned part. The specific process is as follows: After the rotating motor 67 is turned on, it drives the double-threaded screw 66 to rotate forward. Since the two sets of threads opened on the outer surface of the double-threaded screw 66 are set in opposite directions, when it rotates, the inner rod a61 and the inner rod b65 will be displaced toward each other along the slide groove 601, thereby driving the two push rods 63 to deflect inwards through the two sets of connecting rods a640 and connecting rod b64 between the two, and then pushing the two extrusion rods 60 to displace toward each other along the inner rod a61 and the inner rod b65, so that the connecting rods a640 and b65 are displaced toward each other. The rectangular space enclosed by the connecting rod b64, the inner rod a61, and the inner rod b65 gradually decreases, and the lumps gathered by the conductive silver paste are scraped inward by the slurry collecting scraper 602 and the combined scraper 62 at the inner bottom to complete the mixing; when the slurry returning scraper 432 moves to the other side of the silk screen mesh 51 and follows the lifting frame a431 on its top to move downward, the rotating motor 67 starts to reverse, so that the rectangular space enclosed by the connecting rod a640, the connecting rod b64, the inner rod a61, and the inner rod b65 gradually expands.

[0046] The combined scraper 62 includes a plurality of card blocks 621, the bottom of each card block 621 is movably plugged into the bottom of the telescopic slot 610, and an insert block 620 is movably plugged between every two card blocks 621, and the bottom end of each insert block 620 is movably plugged into the bottom of the telescopic slot 610, and a push plate 622 is fixedly installed at the bottom end of each insert block 620 and card block 621. When the two extrusion rods 60 are displaced toward each other, the slurry scraper 602 at the bottom thereof will squeeze the push plate 622 upward in turn when passing under the push plate 622 at the bottom of the combined scraper 62, so that the block 621 and the insert block 620 arranged in the combined scraper 62 are pushed into the telescopic groove 610, thereby ensuring that the two slurry scrapers 602 can be displaced smoothly. The tops of the insert block 620 and the block 621 are connected to the bottom of the telescopic groove 610 through a connecting spring. When the slurry scraper 602 detaches from the bottom of one of the push plates 622, the push plate 622 and the block 621 and the insert block 620 at its top will fall to the initial position to continue scraping the material.

[0047] according to Figure 2 、 Figure 3 and Figure 4As shown, two clamping rods 42 are fixedly installed on both sides of the lateral adjustment rod 41, and pneumatic telescopic rods b44 are movably installed on the tops of the two clamping rods 42, and lifting frames b440 are fixedly installed on the tops of the two pneumatic telescopic rods b44. Two fixing rods 46 are symmetrically fixedly installed between the bottom ends of the two lifting frames b440, and two grooved steels 47 are symmetrically movably installed between the two fixing rods 46. The tops of the two grooved steels 47 are threadedly connected with fastening bolts 470, and the bottoms of the fastening bolts 470 are movably engaged with the top of the outer frame 50; when it is necessary to replace the clamped mesh panels 5 of different sizes, the fastening bolts 470 located on the current outer frame 50 can be loosened, and the two grooved steels 47 can be pushed in opposite directions along the fixing rods 46, so that the distance between the two grooved steels 47 is increased, and the current clamped mesh panel 5 in the middle can be taken out. Next, one side of the newly replaced clamping mesh plate 5 is clamped to the inner side of a groove steel 47 and the fastening bolt 470 on the top is tightened, and then the groove steel 47 on the other side is moved closer to the other side of the clamping mesh plate 5 until it is clamped and the fastening bolt 470 on the top is tightened. Finally, the clamping mesh plate 5 and the groove steels 47 on both sides are displaced and adjusted along the fixing rod 46 until the center line of the clamping mesh plate 5 and the fixing rod 46 coincides, and then the groove steel 47 is fixed to the fixing rod 46 by bolts. This is the existing technology.

[0048] according to Figure 3 As shown, two guide rails 401 are symmetrically fixedly mounted on the inner side of the longitudinal adjustment base 40, and a slide bar 402 is movably mounted between the two guide rails 401. One end of the slide bar 402 is fixedly mounted to the outer side of the transverse adjustment bar 41. A lifting screw 403 is movably inserted at the central axis of the slide bar 402, and the bottom of the lifting screw 403 is connected to a screw motor 404. When it is necessary to adjust the height of the transverse adjustment bar 41, the adapter bar 43, and the return slurry scraper 432 and the scraper 433 at their bottom, the screw motor 404 can be started to drive the lifting screw 403 to rotate, thereby controlling the slide bar 402 on one side of the transverse adjustment bar 41 to adjust its height along the slide bar 402.

[0049] according to Figure 8 and Figure 9 As shown, a plurality of through-holes 321 are evenly distributed through the inner sides of the top workbench 31 and the bottom workbench 32. An air guide port 101 is fixedly mounted on the bottom of one end of the partition 10, and the bottom end of the air guide port 101 is connected to an air pump 102. When the films on the top of the top workbench 31 and the bottom workbench 32 are printed and moved to the top of one end of the partition 10, the air pump 102 will be turned on intermittently, and the upward airflow passes through the through-holes 321 of the top workbench 31 and the bottom workbench 32, blowing the films on the top upward and separating them from the upper surfaces of the top workbench 31 and the bottom workbench 32, facilitating subsequent unloading.

[0050] Place two films on the upper surfaces of the top workbench 31 and the bottom workbench 32 respectively, start the controllable pneumatic rod b310, the controllable pneumatic rod b310 drives the top workbench 31 to move, the top workbench 31 and the film set on its upper surface move to the bottom of the printing device 4 and the clamping screen 5, pour a suitable amount of conductive silver material on the upper surface of the silk screen 51 in the outer frame 50, the silk screen 51 is provided with holes according to the printing area, start the driving motor 410, the driving motor 410 drives the transmission belt 411 to move, the transmission belt 411 drives the transfer rod 43 to move, the transfer rod 43 drives the bottom back-slurry scraper 432 and the scraper plate 433 to move horizontally, and at the same time one of the pneumatic telescopic rods a430 drives the scraper plate 433 to descend, so that the scraper plate 433 contacts the upper surface of the silk screen 51, and as it moves, the squeegee 433 scrapes the conductive silver material flat. Under the pressure of the squeegee 433 and its own gravity, the conductive silver material is printed on the film through the holes in the silk screen 51. The lengths of the squeegee 433 and the return scraper 432 are consistent with the length of the area to be printed on the film. The excess conductive silver material on the silk screen 51 is distributed on one side of the squeegee 433 and on both sides of the silk screen 51 outside the printing area. When the squeegee 433 moves from one side of the silk screen 51 to the other side, the pneumatic telescopic rod a430 drives the squeegee 433 to rise and separate from the surface of the silk screen 51, and the other pneumatic telescopic rod a430 drives the return scraper 432 to descend and contact the surface of the silk screen 51, and the drive motor 410 reverses. The return scraper 432 is driven to move by the transmission belt 411, and the return scraper 432 scrapes the excess conductive silver material on one side of the scraper 433 to the other side of the screen printing mesh 51. When the return scraper 432 is reset and moved to the other side of the screen printing mesh 51, that is, the scraper 433 and the return scraper 432 move from the starting end of one side of the screen printing mesh 51 to the other end and reset and move to the starting end again, the scraper 433 and the return scraper 432 are raised by the pneumatic telescopic rod a430, and the rotating motor 67 is started. The rotating motor 67 drives the double-threaded screw 66 to rotate. The double-threaded screw 66 is threadedly connected to the inner rod a61 and the inner rod b65 to move toward each other, and the distance between the inner rod a61 and the inner rod b65 is shortened and squeezes the corresponding hinged connecting rod a 640, connecting rod b64, connecting rod a640, connecting rod b64 rotates while moving, one side of connecting rod a640, connecting rod b64 is limited by the outer frame 50, connecting rod a640, connecting rod b64 can only rotate in the direction close to the extrusion rod 60, thereby pushing the two extrusion rods 60 to move toward each other, and a rectangular area is formed between the inner insertion rod a61, inner insertion rod b65 and the two extrusion rods 60. Through the movement of the inner insertion rod a61, inner insertion rod b65 and the two extrusion rods 60, this rectangular area gradually shrinks. The movement of the inner insertion rod a61 and the inner insertion rod b65 drives the combined scraper 62 to move, and the movement of the extrusion rod 60 drives the push plate 622 to move, thereby pushing the conductive silver material located outside the printing area of ​​the silk screen 51 to the center area of ​​the silk screen 51.After the silver paste printing of the film is completed, the pneumatic telescopic rod b44 is activated. The pneumatic telescopic rod b44 drives the clamping screen 5 to rise through the lifting frame b440 and the fixed rod 46. The screen printing screen 51 is separated from the surface of the printed film. The controllable pneumatic rod b310 is activated, which drives the top workbench 31 to move out from under the printing device 4 and the clamping screen 5. The printed film on the top workbench 31 is removed and the film to be printed is placed. At the same time, the controllable pneumatic rod a320 drives the bottom workbench 32 to move, and the bottom workbench 32 and the film on its upper surface are moved to under the printing device 4 and the clamping screen 5, and the silver material printing is carried out.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A conductive silver paste printing device suitable for various types of thin film sensors, comprising a base (1), a partition (10), and a semi-enclosed shell (2), wherein the top of the base (1) is fixedly mounted to the bottom edge of the partition (10), and the top edge of the partition (10) is fixedly mounted to the bottom edge of the semi-enclosed shell (2), and characterized in that: A double-layer reciprocating workbench (3) is movably mounted on the top of one end of the partition (10), and a printing device (4) is movably mounted on the top of the other end of the partition (10); a clamping screen (5) is movably clamped on the inner side of the bottom of the printing device (4), and a slurry pushing assembly (6) is movably mounted on the inner side of the clamping screen (5); The printing device (4) includes a longitudinal adjustment seat (40), a transverse adjustment rod (41), and a transfer rod (43); one end of the longitudinal adjustment seat (40) is movably mounted on one end of the transverse adjustment rod (41), and the other end of the transverse adjustment rod (41) is fixedly mounted on one end of the transfer rod (43); two pneumatic telescopic rods a (430) are fixedly mounted on the top of the other end of the transfer rod (43); and a lifting frame a (431) is fixedly mounted on the top of the two pneumatic telescopic rods a (430); a back-paste scraper (432) is fixedly mounted on the bottom end of one of the lifting frames a (431), and a scraper (433) is fixedly mounted on the bottom end of the other lifting frame a (431); The pusher assembly (6) includes two extrusion rods (60), and the inner sides of the two extrusion rods (60) are penetrated by a slide groove (601), an inner rod a (61) is slidably installed between one end of the two slide grooves (601), and an inner rod b (65) is slidably installed between the other ends of the two slide grooves (601), and two connecting rods a (640) are movably installed at both ends of the inner rod a (61), and two connecting rods b (640) are movably installed at both ends of the inner rod b (65). ), a push rod (63) is movably installed between the two groups of connecting rods a (640) and connecting rods b (64), one end of the two push rods (63) is fixedly installed on one side of the two extrusion rods (60), and a slurry collecting scraper (602) is fixedly installed on the bottom of the two extrusion rods (60), and the inner sides of the inner insertion rods a (61) and the inner insertion rods b (65) are penetrated by a telescopic groove (610), and a combined scraper (62) is movably installed on the inner side of the telescopic groove (610).

2. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 1, characterized in that: The combined scraper (62) comprises a plurality of clamping blocks (621), the bottom of each clamping block (621) being movably plugged into the bottom of the telescopic slot (610), an inserting block (620) being movably plugged between every two clamping blocks (621), and the bottom end of each inserting block (620) being movably plugged into the bottom of the telescopic slot (610), and a push plate (622) being fixedly mounted on the bottom end of each inserting block (620) and clamping block (621).

3. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 1, characterized in that: A double-threaded screw rod (66) is movably connected between the tops of the inner insert rod a (61) and the inner insert rod b (65), and two sets of reverse threads are provided on the outer side of the double-threaded screw rod (66). A rotating motor (67) is installed at one end of the double-threaded screw rod (66).

4. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 3, characterized in that: The clamped screen plate (5) comprises an outer frame (50) and a screen printing screen (51), and the inner side of the bottom of the outer frame (50) and the outer side of the screen printing screen (51) are fixedly mounted.

5. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 4, characterized in that: A limiting rod (501) is fixedly mounted on the inner side of one end of the outer frame (50), and the bottom of the limiting rod (501) is fixedly mounted on the outer side of the top of the rotating motor (67).

6. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 5, characterized in that: Two clamping rods (42) are fixedly installed on both sides of the lateral adjustment rod (41), and a pneumatic telescopic rod b (44) is movably installed on the top of the two clamping rods (42), and a lifting frame b (440) is fixedly installed on the top of the two pneumatic telescopic rods b (44). Two fixing rods (46) are symmetrically fixedly installed between the bottom ends of the two lifting frames b (440), and two groove steels (47) are symmetrically movably installed between the two fixing rods (46). The tops of the two groove steels (47) are threadedly connected with fastening bolts (470), and the bottoms of the fastening bolts (470) are movably connected to the top of the outer frame (50).

7. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 1, characterized in that: A transmission belt (411) is movably mounted on the inner side of the transverse adjustment rod (41), and a driving motor (410) is mounted on the inner side of one end of the transmission belt (411). One side of the transmission belt (411) is fixedly mounted to one end of the transfer rod (43).

8. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 1, characterized in that: Two guide rails (401) are symmetrically fixedly installed on the inner side of the longitudinal adjustment seat (40), and a slide rod (402) is movably installed between the two guide rails (401). One end of the slide rod (402) is fixedly installed on the outer side of the transverse adjustment rod (41), and a lifting screw rod (403) is movably inserted at the central axis of the slide rod (402). The bottom of the lifting screw rod (403) is connected to a screw motor (404).

9. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 1, characterized in that: The double-layer reciprocating workbench (3) includes two limit rails (30), the bottoms of the two limit rails (30) are fixedly installed on the top of the partition (10), a bottom workbench (32) is movably installed between the bottoms of the two limit rails (30), and a top workbench (31) is movably installed between the tops of the two limit rails (30), a controllable pneumatic rod a (320) is installed at one end of the bottom workbench (32), and a controllable pneumatic rod b (310) is installed at one end of the top workbench (31).

10. The conductive silver paste printing device applicable to various types of thin film sensors according to claim 9, characterized in that: A plurality of through holes (321) are evenly formed on the inner sides of the top workbench (31) and the bottom workbench (32); an air guide port (101) is fixedly mounted on the bottom of one end of the partition (10), and the bottom end of the air guide port (101) is connected to an air pump (102).

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