Double-sided printing current breakdown resistant thick film resistor preparation equipment

Abstract

The invention discloses double-sided printing current breakdown resistant thick film resistor preparation equipment which comprises a support, two transverse guide rails are fixed in the middle of the support, a first silk screen frame and a second silk screen frame which are staggered up and down are arranged between the two transverse guide rails in a sliding mode, and a lifting frame is arranged in the support above the transverse guide rails in a sliding mode. A sliding block is arranged in the lifting frame in a sliding mode, and a printing roller and a cleaning roller are arranged on the two sides of the sliding block correspondingly. A bottom plate frame is arranged at the position, corresponding to the printing roller, below the transverse guide rail, a bottom plate is arranged in the bottom plate frame, and a water tank is arranged at the position, corresponding to the cleaning roller, below the transverse guide rail. Compared with the prior art, the device has the advantages of synchronous double-station operation, self-adaptive bottom plate overturning and dynamic directional liquid supply, and the industrial problems of low efficiency, alignment deviation, uneven coating and the like in double-sided printing of the thick-film resistor are systematically solved.

Description

Technical Field

[0001] The invention relates to the technical field of resistor preparation, in particular to equipment for preparing a thick-film resistor capable of double-sided printing and resisting current breakdown. Background Art

[0002] In high-end electronics manufacturing, thick-film resistors are widely used as core components in high-voltage circuits, power modules, and precision instruments. As electronic devices evolve toward miniaturization and higher power, double-sided printed thick-film resistors have become a key path to overcoming technical bottlenecks. By simultaneously constructing conductive layers on both sides of the substrate, they significantly disperse the current load, avoiding breakdown failure caused by concentrated heat on one side. Furthermore, the double-sided design increases resistance density per unit area, supporting more complex circuit integration.

[0003] The current industry relies primarily on three technical solutions, all of which have significant limitations. The single-machine, step-by-step printing model uses two independent machines to process the front and back sides separately. After the first machine completes printing on the front side, the substrate must be manually removed, cleaned, flipped, and repositioned before the second machine prints the back side. Semi-automatic flipping machines, while integrating a mechanical flipping mechanism within a single machine, still fail to address the fundamental issue. A robotic arm grips the substrate, flips it 180°, and then prints the second time. However, the screen requires manual cleaning every one or two prints, which takes up time. The flipped substrate lacks an adaptive support structure, making it prone to misalignment or micro-cracks due to uneven force. Fixed-angle liquid supply pipes cause delayed slurry spraying during roller reversal, resulting in localized accumulation or wetting defects. Dual-station parallel machines attempt to improve efficiency by placing parallel stations, but this introduces new challenges. Separate front and back printing stations increase equipment footprint and capital costs. Mechanical vibration during substrate transfer can easily cause micro-cracks in the printed coating. The separation of the cleaning and printing stations prevents simultaneous operation, further limiting overall efficiency.

[0004] Therefore, it is necessary to provide a double-sided printed thick film resistor preparation device that is resistant to current breakdown to solve the problems raised in the above background technology. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for preparing a thick-film resistor with double-sided printing and current breakdown resistance, comprising a bracket, two transverse guide rails fixed in the middle of the bracket, a first wire mesh frame and a second wire mesh frame staggered in upper and lower directions slidably disposed between the two transverse guide rails, a lifting frame slidably disposed in the bracket above the transverse guide rails, a slider slidably disposed in the lifting frame, a printing roller and a cleaning roller respectively disposed on either side of the slider;

[0006] A bottom plate frame is provided at a position corresponding to the printing roller below the transverse guide rail, a bottom plate is provided in the bottom plate frame, and a water tank is provided at a position corresponding to the cleaning roller below the transverse guide rail.

[0007] Furthermore, preferably, a first telescopic bar connected to the lifting frame is provided above the bracket.

[0008] Furthermore, preferably, a second telescopic rod connected to the slider is provided on one side of the lifting frame.

[0009] Furthermore, preferably, two racks distributed up and down are slidably arranged in the transverse guide rail, a gear is rotatably arranged between the two racks, and the gear is engaged with the two racks, and the two racks are respectively fixed to the first wire mesh frame and the second wire mesh frame.

[0010] Further, as a preference, a first driving motor connected to the gear is provided in the bracket.

[0011] Furthermore, as a preference, a spraying pipe and a cleaning pipe are rotatably provided in the sliders above the printing roller and the cleaning roller, respectively, and the spraying pipe and the cleaning pipe are fixedly connected together by a connecting shaft.

[0012] Furthermore, preferably, a pawl is fixed at the center of the connecting shaft, a ratchet bar perpendicular to the connecting shaft is fixed in the lifting frame above the connecting shaft, and the pawl is fitted into the ratchet bar.

[0013] Furthermore, as a preference, the bottom plate frame is a frame that penetrates from top to bottom, and two rotating wheels are rotatably provided on the front and back sides thereof, and two support bars are fixed to the edges of the rotating wheels.

[0014] Furthermore, as a preference, the front and rear faces of the bottom frame are rotatably connected to lifting plates, the lifting plates are slidably arranged in transverse guide rails, and a third telescopic bar is arranged between the transverse guide rails and the lifting plates.

[0015] Furthermore, as a preference, side bevel gears are fixed to opposite sides of the two runners on the same surface, a central bevel gear is fixed in the lifting plate, and the central bevel gear is meshed with both side bevel gears;

[0016] A second drive motor is provided in the lifting plate, and a rotating shaft of the second drive motor rotatably passes through the central bevel gear and is fixed to the bottom plate frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention uses an innovative gear-rack linkage mechanism to drive the first and second screen frames to slide synchronously in opposite directions, achieving automatic switching between the printing and cleaning stations. While one screen frame is printing the resistive coating, the other screen frame simultaneously completes screen cleaning, completely eliminating the downtime required for screen replacement in traditional equipment. The second drive motor and bevel gear set collaboratively control the automatic flipping function of the base frame, and the support strips adaptively switch to the back of the base, eliminating the need for manual intervention in flipping and positioning operations during the double-sided printing process. This dual-station synchronous operation mode shortens the single-piece production cycle and significantly increases production capacity.

[0019] In the present invention, the third telescopic rod dynamically adjusts the height of the base frame to ensure that the base is always in close contact with the screen, eliminating pattern deformation caused by printing gaps; the horizontal guide rail controls the parallel movement of the double screen frames to minimize the alignment error of the front and back resistor patterns; the liquid supply direction adaptive system composed of the pawl and the ratchet bar ensures that the paint and detergent are accurately sprayed in front of the roller in the direction of travel, thereby improving the uniformity of slurry infiltration and ensuring the uniformity of the thickness of the thick film coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a device for preparing a double-sided printed thick film resistor with current breakdown resistance;

[0021] Figure 2 A schematic diagram of the side structure of a device for preparing a double-sided printed thick film resistor with current breakdown resistance;

[0022] Figure 3 Schematic diagram of the structure of the bottom plate frame;

[0023] Figure 4 Schematic diagram of the upper surface structure of the bottom plate frame;

[0024] Figure 5 This is a structural diagram of the bottom plate frame rotating to a horizontal state;

[0025] Figure 6 This is a structural diagram of the bottom plate frame rotating to a vertical state;

[0026] In the figure: 1. Bracket; 2. Horizontal guide rail; 21. First wire mesh frame; 22. Second wire mesh frame; 23. Rack; 24. Gear; 3. Lifting frame; 31. First telescopic bar; 32. Ratchet bar; 4. Slider; 41. Second telescopic bar; 42. Printing roller; 43. Cleaning brush; 44. Spray pipe; 45. Cleaning pipe; 46. Connecting shaft; 47. Ratchet; 5. Bottom plate frame; 51. Rotating wheel; 52. Side bevel gear; 53. Center bevel gear; 54. Support bar; 6. Bottom plate; 7. Water tank; 8. First drive motor; 9. Second drive motor; 10. Lifting plate; 11. Third telescopic bar. DETAILED DESCRIPTION

[0027] Please refer to Figures 1-6 In the embodiment of the present application, a double-sided printing anti-current breakdown thick film resistor preparation device comprises a support 1, two horizontal guide rails 2 are fixed in the middle of the support 1, a first screen frame 21 and a second screen frame 22 are slidably arranged between the two horizontal guide rails 2, a lifting frame 3 is slidably arranged in the support 1 above the horizontal guide rails 2, a sliding block 4 is slidably arranged in the lifting frame 3, and a printing roller 42 and a cleaning roller 43 are arranged on the two sides of the sliding block 4 respectively.

[0028] A bottom plate frame 5 is arranged at a position corresponding to the printing roller 42 below the horizontal guide rail 2, a bottom plate 6 is arranged in the bottom plate frame 5, and a water tank 7 is arranged at a position corresponding to the cleaning roller 43 below the horizontal guide rail 2.

[0029] The first screen frame 21 and the second screen frame 22 are respectively provided with screens engraved with front and back surfaces of thick film resistors, and by sliding the first screen frame 21 and the second screen frame 22, the printing roller 42 can print the front and back coatings on the bottom plate 6 of the bottom plate frame 5 in turn, and the screen on the first screen frame 21 or the second screen frame 22 under the cleaning roller 43 can be cleaned by the cleaning roller 43.

[0030] In the embodiment, a first telescopic rod 31 connected to the lifting frame 3 is arranged above the support 1.

[0031] The height of the lifting frame 3 can be controlled by the first telescopic rod 31, so as to control the height of the printing roller 42 and the cleaning brush 43, so that they are attached to the surface of the first screen frame 21 or the second screen frame 22.

[0032] In the embodiment, a second telescopic rod 41 connected to the sliding block 4 is arranged on one side of the lifting frame 3.

[0033] The sliding position of the sliding block 4 can be controlled by the second telescopic rod 41, so that the printing roller 42 and the cleaning roller 43 move along the surface of the first screen frame 21 or the second screen frame 22 for printing or cleaning.

[0034] In the embodiment, two upper and lower distribution racks 23 are slidably arranged in the horizontal guide rail 2, a gear 24 is rotatably arranged between the two racks 23, the gear 24 is engaged with the two racks 23, and the two racks 23 are respectively fixed in the first screen frame 21 and the second screen frame 22.

[0035] In the embodiment, a first drive motor 8 connected to the gear 24 is arranged in the support 1.

[0036] That is to say, the first drive motor 8 drives the gear 24 to drive the two racks 23 to slide in opposite directions synchronously, so that the first wire mesh frame 21 and the second wire mesh frame 22 always slide in opposite directions synchronously to switch between the printing roller 42 and the cleaning roller 43.

[0037] In this embodiment, a spraying pipe 44 and a cleaning pipe 45 are rotatably provided in the slider 4 above the printing roller 42 and the cleaning roller 43 , respectively. The spraying pipe 44 and the cleaning pipe 45 are fixedly connected together by a connecting shaft 46 .

[0038] The slurry and the cleaning agent can be sprayed into the printing roller 42 and the cleaning roller 43 respectively through the spraying pipe 44 and the cleaning pipe 45 to perform real-time liquid supply.

[0039] In this embodiment, a pawl 47 is fixed at the center of the connecting shaft 46 , and a ratchet bar 32 perpendicular to the connecting shaft 46 is fixed in the lifting frame 3 above the connecting shaft 46 , and the pawl 47 fits into the ratchet bar 32 .

[0040] When the slider 4 slides in one direction, the pawl 47 is blocked by the ratchet bar 32, causing the connecting shaft 46 to rotate a certain angle, thereby driving the spray pipe 44 and the cleaning pipe 45 to tilt in the sliding direction of the slider 4, ensuring that the slurry and detergent can always be sprayed in front of the printing roller 42 and the cleaning roller 43 in the direction of travel.

[0041] In this embodiment, the bottom plate frame 5 is a frame that is through-through from top to bottom, and two rotating wheels 51 are rotatably provided on the front and back surfaces thereof, and two supporting bars 54 are fixed to the edges of the rotating wheels 51 .

[0042] The bottom of the base plate 6 can be supported by the support bar 54, and the height of the base plate 6 can be controlled by adjusting the rotation angle of the wheel 51 so that its upper surface is higher than the base plate frame 5, ensuring that it will not be obstructed by the base plate frame 5 when it is attached to the bottom of the wire mesh of the first wire mesh frame 21 or the second wire mesh frame 22.

[0043] In this embodiment, the front and rear surfaces of the bottom frame 5 are rotatably connected to a lifting plate 10 , and the lifting plate 10 is slidably set in the transverse guide rail 2 , and a third telescopic rod 11 is provided between the transverse guide rail 2 and the lifting plate 10 .

[0044] The height of the bottom plate frame 5 can be controlled by the third telescopic rod 11 so that the bottom plate 6 of the bottom plate frame 5 can fit into the bottom of the wire mesh of the first wire mesh frame 21 or the second wire mesh frame 22 .

[0045] In this embodiment, the two rotating wheels 51 on the same side are fixed with side bevel gears 52 on opposite sides, and the lifting plate 10 is fixed with a central bevel gear 53, and the central bevel gear 53 is meshed with the two side bevel gears 52;

[0046] The lifting plate 10 is provided with a second driving motor 9 , and a rotating shaft of the second driving motor 9 rotatably passes through the central bevel gear 53 and is fixed to the bottom plate frame 5 .

[0047] That is to say, the second drive motor 9 can drive the bottom plate frame 5 to flip, so that the bottom plate 6 can be flipped for double-sided printing. During the flipping process of the bottom plate frame 5, the side bevel gear 52 will drive the rotating wheel 51 to rotate under the action of the central bevel gear 53, so that another support bar 54 in the rotating wheel 51 supports the bottom of the bottom plate 6, ensuring that the bottom plate 6 is supported by the support bar 54 no matter which side it is flipped to, and when the bottom plate 6 returns to a horizontal state, the angle of the support bar 54 supports the bottom plate 6 to be higher than the upper surface of the bottom plate frame 5.

[0048] In specific implementation, the screen with the resistor front pattern is loaded into the first screen frame 21, and the screen with the resistor back pattern is loaded into the second screen frame 22. The substrate 6 to be printed is placed in the substrate frame 5 and supported by the support bars 54. Thick film resistor slurry is injected into the spray pipe 44, and a special screen cleaner is injected into the cleaning pipe 45.

[0049] Start the first drive motor 8, the drive gear 24 drives the rack 23 to move in the opposite direction synchronously, so that the first screen frame 21 slides to the printing position (below the printing roller 42), and the second screen frame 22 moves to the cleaning position (below the cleaning roller 43) synchronously;

[0050] The third telescopic lever 11 is activated to lift the bottom plate frame 5, so that the bottom plate 6 is in close contact with the bottom of the screen of the first screen frame 21. The lifting frame 3 is lowered by the first telescopic lever 31, so that the printing roller 42 contacts the screen. The second telescopic lever 41 is activated to push the slider 4 to move horizontally. The printing roller 42 rolls and prints the slurry, completing the front coating transfer. The pawl 47 and the ratchet bar 32 automatically tilt the spray pipe 44 to feed the material forward.

[0051] The second drive motor 9 is started to drive the bottom plate frame 5 to flip 180 degrees. At the same time, the central bevel gear 53 drives the bevel gears 52 on both sides to rotate, causing the rotating wheel 51 to rotate. The support bar 54 automatically switches to the back of the bottom plate 6 to provide support and keep the bottom plate 6 higher than the border of the bottom plate frame 5.

[0052] The bottom plate frame 5 is lifted again by the third telescopic rod 11 so that the bottom plate 6 is close to the screen, and the first drive motor 8 is started again to move the second screen frame 22 to the printing position, and the above steps are repeated to complete the back printing;

[0053] At the same time, when any wire mesh rack is in the cleaning position, the cleaning roller 43 rolls and wipes the wire mesh, and the cleaning pipe 45 is controlled by the ratchet mechanism to tilt forward and spray the detergent.

[0054] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A double-sided printed thick film resistor preparation device, comprising a bracket (1), two transverse guide rails (2) fixed in the middle of the bracket (1), a first wire mesh frame (21) and a second wire mesh frame (22) staggered in upper and lower directions are slidably arranged between the two transverse guide rails (2), a lifting frame (3) is slidably arranged in the bracket (1) above the transverse guide rails (2), a slider (4) is slidably arranged in the lifting frame (3), a printing roller (42) and a cleaning roller (43) are respectively arranged on both sides of the slider (4); A bottom plate frame (5) is provided below the transverse guide rail (2) at a position corresponding to the printing roller (42), a bottom plate (6) is provided in the bottom plate frame (5), and a water tank (7) is provided below the transverse guide rail (2) at a position corresponding to the cleaning roller (43).

2. The double-sided printed thick film resistor manufacturing device according to claim 1, characterized in that: A first telescopic rod (31) connected to the lifting frame (3) is provided above the bracket (1).

3. The double-sided printed thick film resistor manufacturing device according to claim 1, characterized in that: A second telescopic rod (41) connected to the slider (4) is provided on one side of the lifting frame (3).

4. The double-sided printed thick film resistor manufacturing device according to claim 1, characterized in that: Two racks (23) distributed up and down are slidably arranged in the transverse guide rail (2), a gear (24) is rotatably arranged between the two racks (23), and the gear (24) is engaged with the two racks (23), and the two racks (23) are respectively fixed to the first wire mesh frame (21) and the second wire mesh frame (22).

5. The double-sided printed thick film resistor manufacturing device according to claim 4, characterized in that: A first drive motor (8) connected to a gear (24) is provided in the bracket (1).

6. The double-sided printed thick film resistor manufacturing device according to claim 1, characterized in that: A spraying tube (44) and a cleaning tube (45) are rotatably mounted in the slider (4) above the printing roller (42) and the cleaning roller (43), respectively. The spraying tube (44) and the cleaning tube (45) are fixedly connected together via a connecting shaft (46).

7. The double-sided printed thick film resistor manufacturing device according to claim 6, characterized in that: A ratchet (47) is fixed at the center of the connecting shaft (46), a ratchet bar (32) perpendicular to the connecting shaft (46) is fixed in the lifting frame (3) above the connecting shaft (46), and the ratchet (47) is fitted into the ratchet bar (32).

8. The double-sided printed thick film resistor manufacturing device according to claim 1, characterized in that: The bottom plate frame (5) is a frame that is through-through from top to bottom, and two rotating wheels (51) are rotatably provided on the front and back sides of the frame, and two supporting bars (54) are fixed to the edges of the rotating wheels (51).

9. The double-sided printed thick film resistor manufacturing device according to claim 8, characterized in that: The front and rear surfaces of the bottom plate frame (5) are rotatably connected to a lifting plate (10), and the lifting plate (10) is slidably arranged in the transverse guide rail (2). A third telescopic rod (11) is arranged between the transverse guide rail (2) and the lifting plate (10).

10. The double-sided printed thick film resistor manufacturing device according to claim 9, characterized in that: Side bevel gears (52) are fixed to opposite sides of the two rotating wheels (51) on the same side, a central bevel gear (53) is fixed in the lifting plate (10), and the central bevel gear (53) is meshed with the two side bevel gears (52); A second drive motor (9) is provided in the lifting plate (10), and a rotating shaft of the second drive motor (9) rotatably passes through the central bevel gear (53) and is fixed to the bottom plate frame (5).

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