Magnetic core surface conductive silver paste transfer printing device and using method

Abstract

The invention belongs to the technical field of transfer printing equipment, and discloses a magnetic core surface conductive silver paste transfer printing device and a using method, specifically, the magnetic core surface conductive silver paste transfer printing device comprises a rack, and a feeding assembly, a transfer printing assembly, a drying assembly and a discharging assembly which are arranged on the rack, and the rack is slidably connected with a moving seat; the transfer printing assembly comprises a rotating frame, a scraper and a pushing rod, wherein the scraper and the pushing rod are fixedly connected to the end of the rotating frame. A guide rail plate is fixedly installed on one side of the fixing frame, a groove which is communicated end to end is formed in one side of the guide rail plate, a rotating plate is fixedly installed on the rotating frame, a sliding rod is fixedly installed on one side of the rotating plate, the sliding rod is arranged in the groove in a sliding fit mode, and the inner side of the groove is of a parallelogram structure. Automatic pad printing operation is achieved through movement of the movable base, independent driving equipment does not need to be additionally arranged to control the material pushing rod and the scraper, and the manufacturing cost of the device is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of pad printing equipment, and in particular relates to a device for pad printing conductive silver paste on the surface of a magnetic core and a use method thereof. Background Art

[0002] Conductive electrodes can be formed on the surface of the magnetic core by pad printing silver paste, which is convenient for connecting to the circuit. The pad printing of the magnetic core is carried out by a movable pad printing head that picks up silver paste in a silver paste box and then moves it to the magnetic core for printing, and finally the magnetic core is dried. Before the pad printing head picks up silver paste in the silver paste box, it needs to use a push rod to push the silver paste into the silver paste box to cover the pad printing pattern, and then use a scraper to scrape off excess silver paste, so that the pad printing head can pick up the silver paste in the pad printing pattern. In order to avoid the space between the push rod and the scraper limiting the amount of silver paste pushed each time, the push rod and the scraper are often alternately in conflict with the silver paste box. The existing push rod and the scraper are often respectively lifted and lowered by two electric push rods, which makes the manufacturing cost of the equipment high; in addition, the existing drying structure often sets an open magnetic core inlet and outlet, so that part of the heat overflows and diffuses from the inlet and outlet of the magnetic core, causing waste of resources and affecting the drying efficiency. Summary of the invention

[0003] The object of the present invention is to provide a conductive silver paste pad printing device for a magnetic core surface, so as to solve the problems of high manufacturing cost and heat loss of a drying box in the existing conductive silver paste pad printing device for a magnetic core surface.

[0004] To achieve the above object, the present invention provides the following technical solutions: A conductive silver paste pad printing device for a magnetic core surface comprises a frame and a loading component, a pad printing component, a drying component and a unloading component arranged on the frame, wherein the drying component is slidably arranged above the unloading component, a moving seat is slidably connected to the frame, and a groove for placing a magnetic core is arranged on the moving seat; The pad printing assembly includes a fixed frame fixed on the frame and a silver paste box fixed on one side of the fixed frame, one side of the fixed frame is located above the silver paste box and is slidably connected to a first slide seat, the inner bottom surface of the silver paste box is provided with a pad printing pattern, a mounting frame is fixedly installed on one side of the first slide seat, a lifting frame is vertically slidably connected to one side of the first slide seat, a pad printing head is fixedly installed at the bottom of the lifting frame, the bottom of the mounting frame is rotatably connected to an inverted V-shaped rotating frame, and both ends of the bottom of the rotating frame are respectively fixedly connected to a scraper and a push rod; A guide rail plate is fixedly installed on one side of the fixed frame, and a groove connected from end to end is provided on one side of the guide rail plate. A rotating plate is fixedly installed on the rotating frame, and a sliding rod is fixedly installed on one side of the rotating plate. The sliding rod is slidably fitted in the groove, and the inner side of the groove is a parallelogram structure.

[0005] Preferably, the pad printing assembly also includes a baffle fixed on the frame and a fork material rack slidably connected to the frame, the baffle and the fork material rack are respectively located on both sides of the movable seat, a first electric push rod is fixedly mounted on the frame, and the fork material rack is fixedly connected to the telescopic end of the first electric push rod.

[0006] Preferably, a first screw rod which is screwed and penetrates the first slide seat is rotatably provided on the fixing frame, and a fifth screw rod which is screwed and extends into the top of the lifting frame is rotatably provided on the top of the fixing frame.

[0007] Preferably, a third screw rod is rotatably provided on the frame, and the third screw rod is screwed and penetrates the movable seat.

[0008] Preferably, the loading assembly includes a material picking rack fixed on the frame and a plurality of guide rails for storing magnetic cores, the material picking rack is slidably connected to a second slide, the material picking rack is rotatably provided with a second screw rod that screws through the second slide, a third electric push rod is fixedly installed on the bottom of the second slide, a material picking plate is fixedly installed on the bottom end of the third electric push rod, and a plurality of electromagnetic suction cups corresponding to the plurality of grooves on the moving seat are provided at the bottom of the material picking plate.

[0009] Preferably, the unloading assembly includes a unloading frame fixed on the frame and a pushing rack slidably connected to the frame, a second electric push rod is fixedly mounted on the frame, and the pushing rack is fixedly connected to the telescopic end of the second electric push rod.

[0010] Preferably, the drying assembly includes a drying box slidably connected to one side of the fixed frame and a fixed plate fixed in the drying box, a heating plate is fixedly installed on the bottom of the fixed plate, the bottom of the drying box is provided with a through groove matching the top of the movable seat, a slide frame slidably connected in the drying box with the bottom end sliding through the fixed plate, two sealing plates are symmetrically provided in the drying box above the through groove, one end of the two sealing plates are respectively connected to the inner side of the drying box in a horizontal sliding manner, and the other end of the two sealing plates are respectively rotatably connected to the bottom ends of both sides of the slide frame.

[0011] Preferably, a slider is vertically slidably connected to the top of the fixed plate, and two sliding grooves are symmetrically provided on the top of the fixed plate. A sliding shaft is slidably connected in the two sliding grooves, and a first connecting rod and a second connecting rod are rotatably connected to the outer sides of the two sliding shafts. One end of the two first connecting rods are respectively rotatably connected to the two sides of the slider, and one end of the two second connecting rods are respectively rotatably connected to the two ends of the slide.

[0012] Preferably, a fourth screw rod is rotatably provided on the top of the fixing frame, and the bottom end of the fourth screw rod slides through the top of the drying box and is screwed and connected with the slider.

[0013] A method for pad printing conductive silver paste on a magnetic core surface comprises the following steps: Step 1: Slide the movable seat to the bottom of the loading assembly, and use the loading assembly to transfer the multiple magnetic cores to the multiple grooves on the movable seat respectively; Step 2: The sliding movable seat moves to the bottom of the pad printing assembly, and the sliding first slide drives the lifting frame and the pad printing head to move above the pad printing pattern in the silver paste box. When the first slide moves, the mounting frame drives the rotating frame to move synchronously, so that the rotating plate drives the sliding rod to move in the groove on the guide plate. At this time, an oblique side of the parallelogram on the inner side of the groove on the guide plate guides the sliding rod to the lower half of the groove, so that the sliding rod pushes the rotating plate to drive the rotating frame to rotate, so that the bottom of the scraper contacts the inner bottom surface of the silver paste box, and the push rod separates from the inner bottom surface of the silver paste box. Then the sliding rod slides along the groove in the lower half, and the scraper scrapes the excess silver paste in the pad printing pattern back to the end of the silver paste box. Then the lifting frame is moved down to make the bottom of the pad printing head extend into the silver paste box and pick up the silver paste from the pad printing pattern. Then the lifting frame is moved up to move the pad printing head out of the silver paste box. Step 3: Slide the first slide to drive the lifting frame and the pad printing head to move to the top of the moving seat. When the first slide moves, the mounting frame drives the rotating frame to move synchronously, so that the rotating plate drives the slide bar to move in the groove on the guide plate. The other oblique side of the parallelogram on the inner side of the groove on the guide plate guides the slide bar to the upper half of the groove, so that the slide bar pushes the rotating plate to drive the rotating frame to rotate, so that the bottom of the scraper is separated from the inner bottom surface of the silver paste box, and the push rod contacts the inner bottom surface of the silver paste box. Then the slide bar slides along the upper groove, and the push rod pushes the silver paste to the top of the pad printing pattern. Then the lifting frame is moved down to make the bottom of the pad printing head contact with the surfaces of multiple magnetic cores on the moving seat and apply a set pressure, so that the stained silver paste is pad printed on the surface of the magnetic core, and then the lifting frame is moved up to separate the pad printing head from the magnetic core. Step 4: Slide the movable seat to the bottom of the drying assembly, slide the drying assembly downward so that the drying assembly is sleeved on the outside of the movable seat, and allow the drying assembly to dry the silver paste on the surface of the magnetic core; Step 5: After the silver paste on the surface of the magnetic core is dried, move the drying assembly upward, and then use the blanking assembly to push the magnetic core out of the blanking.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention is provided with a guide plate, a rotating frame and a sliding rod. When the rotating frame moves toward the moving seat, the oblique side of the parallelogram on the inner side of the groove on the guide plate guides the sliding rod on one side of the rotating plate to the upper half of the groove, so that the rotating plate drives the rotating frame to rotate so that the bottom of the push rod contacts the inner bottom surface of the silver paste box, and the bottom of the scraper is away from the silver paste box. When the rotating frame is away from the moving seat, the other oblique side of the parallelogram on the inner side of the groove on the guide plate guides the sliding rod on one side of the rotating plate to the lower half of the groove, so that the rotating plate drives the rotating frame to rotate so that the bottom of the scraper contacts the inner bottom surface of the silver paste box, and the bottom of the push rod is away from the silver paste box, thereby realizing that the push rod and the scraper alternately contact the silver paste box, without the need to set up a separate driving device, thereby reducing the manufacturing cost of the device.

[0015] (2) The present invention is provided with a moving seat, and the movement of the moving seat drives the magnetic core to sequentially undergo loading, pad printing, drying and unloading, thereby realizing the automated production of pad printing operations of conductive silver paste on the surface of the magnetic core. The present invention is suitable for mass production and greatly improves the efficiency of magnetic core production. In addition, the multiple grooves on the moving seat separate the multiple magnetic cores to avoid adhesion of silver paste on adjacent magnetic cores after pad printing, thereby ensuring product quality.

[0016] (3) The present invention is provided with a fork frame and a baffle, and the magnetic core on the movable seat is clamped by the fork frame and the baffle before the magnetic core is transferred to the movable seat. On the one hand, the magnetic core is positioned to facilitate the transfer head to transfer multiple magnetic cores at the same time to avoid deviation. On the other hand, the magnetic core is conveniently separated from the transfer head after transfer printing to avoid adhesion.

[0017] (4) The present invention is provided with a slide and a sealing plate. After the movable seat moves to the bottom of the drying assembly, the drying box moves downward so that the through groove at the bottom of the drying box is sleeved on the movable seat, so that the magnetic core is in a closed space. Then the slide is moved upward to slide the two sealing plates on both sides of the box, so that the magnetic core is connected to the inside of the drying box to dry the magnetic core. The sealing plate can keep the inside of the drying box in a closed state when the drying operation is not performed, thereby achieving a heat preservation effect, avoiding heat loss, and reducing waste of resources.

[0018] (5) As described above, the up and down movement of the slide is controlled by the slider moving up and down above the fixed plate. When the slider moves down, the two first connecting rods push the two sliding shafts to slide to both sides in the two sliding grooves, so that the ends of the two second connecting rods push the slide to move upward in the drying box to open the sealing plate; conversely, when the slider moves upward, the slide moves downward in the drying box to close the sealing plate.

[0019] (6) The present invention sets a fourth screw rod. Before the through groove at the bottom of the drying box contacts the movable seat, the gravity of the drying box and the fixed plate applies a downward force to the first connecting rod through the slide groove and the sliding shaft, so that the connection between the first connecting rod and the sliding shaft has a tendency to move toward the middle in the slide groove, so that the second connecting rod pulls the slide so that the bottom end of the slide always contacts the bottom of the drying box, so that the drying box always remains in a closed state before contacting the bottom movable seat, so that when the fourth screw rod is rotated to make the screw-connected slider move up and down, the drying assembly also moves up and down synchronously; after the through groove at the bottom of the drying box contacts the top of the movable seat, when the fourth screw rod is rotated to make the slider move downward, the drying box cannot move downward, so that the slider moves downward in the drying box, so that the drying box can realize the opening of the sealing plate only after it contacts the movable seat, so that the lifting and opening and closing of the drying assembly can be completed only by the fourth screw rod, the structure is simple, and there is no heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a first stereogram of the present invention; Figure 2 is a second stereogram of the present invention; Figure 3 is a first cross-sectional view of the present invention; Figure 4 is a second cross-sectional view of the present invention; Figure 5 is a third cross-sectional view of the present invention; Figure 6 A stereogram of the turret assembly of the present invention; Figure 7 It is a stereogram of the assembly of the feeding assembly of the present invention; Figure 8 It is a three-dimensional diagram of the assembly of the material taking frame of the present invention; Fig. 9 It is a cross-sectional view of the drying assembly assembly of the present invention; Fig.10 It is a stereogram of the fixing plate assembly of the present invention; In the figure: 1-frame, 2-drying box, 3-fixed frame, 4-first screw rod, 5-first slide, 6-lifting frame, 7-mounting frame, 8-rotating frame, 9-scraper, 10-silver paste box, 11-pad printing head, 12-feeding frame, 13-second slide, 14-second screw rod, 15-multi-track guide rail, 16-moving seat, 17-fork material frame, 18-first electric push rod, 19-pushing frame, 20-second electric Push rod, 21-third screw rod, 22-unloading frame, 23-guide plate, 24-rotating plate, 25-pushing rod, 26-feeding plate, 27-third electric push rod, 28-sealing plate, 29-heating plate, 30-fixed plate, 31-slide groove, 32-slide rack, 33-sliding block, 34-fourth screw rod, 35-first connecting rod, 36-second connecting rod, 37-fifth screw rod, 38-sliding rod, 39-baffle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 10 As shown, the present invention provides the following technical solutions: A conductive silver paste pad printing device for a magnetic core surface comprises a frame 1 and a loading assembly, a pad printing assembly, a drying assembly and a blanking assembly arranged on the frame 1, wherein the drying assembly is slidably arranged above the blanking assembly, a moving seat 16 is slidably connected to the frame 1, and a groove for placing a magnetic core is arranged on the moving seat 16; The pad printing assembly includes a fixed frame 3 fixed on the frame 1 and a silver paste box 10 fixed on one side of the fixed frame 3, a pad printing pattern is provided on the inner bottom surface of the silver paste box 10, a first slide 5 is slidably connected to one side of the fixed frame 3 located above the silver paste box 10, a mounting frame 7 is fixedly installed on one side of the first slide 5, a lifting frame 6 is vertically slidably connected to one side of the first slide 5, a pad printing head 11 is fixedly installed at the bottom of the lifting frame 6, an inverted V-shaped rotating frame 8 is rotatably connected to the bottom of the mounting frame 7, and a scraper 9 and a push rod 25 are fixedly connected to both ends of the bottom of the rotating frame 8 respectively; A guide rail plate 23 is fixedly installed on one side of the fixed frame 3, and a groove connecting the end to the end is provided on one side of the guide rail plate 23. A rotating plate 24 is fixedly installed on the rotating frame 8, and a slide bar 38 is fixedly installed on one side of the rotating plate 24. The slide bar 38 slides in the groove, and the inner side of the groove is a parallelogram structure. The pad printing assembly further includes a baffle 39 fixed on the frame 1 and a fork material frame 17 slidably connected to the frame 1, the baffle 39 and the fork material frame 17 are respectively located on both sides of the moving seat 16, a first electric push rod 18 is fixedly installed on the frame 1, and the fork material frame 17 is fixedly connected to the telescopic end of the first electric push rod 18; A first screw rod 4 is rotatably provided on the fixed frame 3 and is screwed through the first sliding seat 5. A fifth screw rod 37 is rotatably provided on the top of the fixed frame 3 and is screwed into the top of the lifting frame 6. A third screw rod 21 is rotatably provided on the frame 1 and is screwed through the movable seat 16.

[0023] Based on the above disclosed structure, when performing the pad printing operation of conductive silver paste on the surface of the magnetic core: First, the third screw rod 21 is driven to rotate so that the screw-connected movable seat 16 moves to the top of the loading assembly, and then the plurality of magnetic cores are transferred to the movable seat 16 through the taking assembly, and the plurality of magnetic cores are arranged in a plurality of grooves on the movable seat 16, so that there is a gap between adjacent magnetic cores, thereby preventing the conductive silver paste on adjacent magnetic cores from sticking during pad printing; Then, the third screw rod 21 is driven to rotate so that the moving seat 16 drives the multiple magnetic cores to move to the bottom of the pad printing assembly, and one end of the moving seat 16 contacts the baffle 39, and then the first electric push rod 18 is started to push out the telescopic end, so that the multiple ends of the fork material rack 17 are respectively inserted into the multiple grooves on the moving seat 16, so that the multiple ends of the fork material rack 17 and the baffle 39 clamp and fix the multiple magnetic cores; Conductive silver paste is stored in the silver paste box 10, and the first screw rod 4 is driven to rotate so that the first slide 5 drives the lifting frame 6 and the pad printing head 11 to move above the pad printing pattern in the silver paste box 10. When the first slide 5 moves, the mounting frame 7 drives the rotating frame 8 to move synchronously, so that the rotating plate 24 drives the slide bar 38 to move in the groove on the guide plate 23. At this time, a hypotenuse of the parallelogram on the inner side of the groove on the guide plate 23 guides the slide bar 38 to the lower half of the groove, so that the slide bar 38 pushes the rotating plate 24 to drive the rotating frame 8 to rotate. The bottom of the scraper 9 contacts the bottom surface of the silver paste box 10, the push rod 25 separates from the bottom surface of the silver paste box 10, and the slide bar 38 slides along the groove of the lower half, and the scraper 9 scrapes the excess silver paste in the pad printing pattern back to the end of the silver paste box 10, and then drives the fifth screw rod 37 to rotate so that the lifting frame 6 drives the pad printing head 11 to move downward and extend into the silver paste box 10, so that the bottom of the pad printing head 11 is dipped into the silver paste in the pad printing pattern, and then the fifth screw rod 37 is driven to rotate in the reverse direction, so that the lifting frame 6 drives the pad printing head 11 to move upward and leave the silver paste box 10; Then, the first screw rod 4 is driven in the reverse direction to rotate so that the first slide 5 drives the lifting frame 6 and the pad printing head 11 to move above the moving seat 16. When the first slide 5 moves, the mounting frame 7 drives the rotating frame 8 to move synchronously, so that the rotating plate 24 drives the slide bar 38 to move in the groove on the guide plate 23. The other oblique side of the parallelogram on the inner side of the groove on the guide plate 23 guides the slide bar 38 to the upper part of the groove, so that the slide bar 38 pushes the rotating plate 24 to drive the rotating frame 8 to rotate, so that the bottom of the scraper 9 is aligned with the bottom of the scraper 9. The inner bottom surface of the silver paste box 10 is separated, and the push rod 25 contacts the inner bottom surface of the silver paste box 10, and then the slide rod 38 moves and slides along the upper groove, and the push rod 25 pushes the silver paste to the top of the pad printing pattern, and then the fifth screw rod 37 is driven to rotate again to make the lifting frame 6 drive the pad printing head 11 to move down and contact the surface of the magnetic core, and the pad printing head 11 applies a set pressure to the magnetic core, so that the conductive silver paste is transferred to the surface of the magnetic core, and then the fifth screw rod 37 is driven in the reverse direction to rotate so that the lifting frame 6 drives the pad printing head 11 to move up and separate from the magnetic core; Then, the third screw rod 21 is driven to rotate so that the movable seat 16 drives the multiple magnetic cores after pad printing to move to the bottom of the drying component, and then the drying component is moved down so that the drying component is sleeved on the outside of the movable seat 16, so that the drying component dries the silver paste on the surface of the magnetic core. After the silver paste on the surface of the magnetic core is dried, the drying component is moved up again, and then the blanking component is used to push the magnetic core out of the blanking, thereby completing the pad printing operation of the conductive silver paste on the surface of the magnetic core.

[0024] In addition, regarding the loading assembly, the preferred loading assembly includes a loading rack 12 fixed on the frame 1 and a multi-track guide rail 15 for storing magnetic cores, the loading rack 12 is slidably connected to a second slide 13, the loading rack 12 is rotatably provided with a second screw rod 14 that screws through the second slide 13, a third electric push rod 27 is fixedly installed on the bottom of the second slide 13, a loading plate 26 is fixedly installed on the bottom end of the third electric push rod 27, and a plurality of electromagnetic suction cups corresponding to the plurality of grooves on the movable seat 16 are provided at the bottom of the loading plate 26. Based on this, the magnetic cores are neatly arranged in the multi-track guide rail 15, and then the second screw rod 14 is driven to rotate so that the second slide 13 moves to above the end of the multi-track guide rail 15, and then the third electric push rod 27 is started to push out the telescopic end so that the material picking plate 26 drives the multiple electromagnetic suction cups to move downward and contact with the multiple magnetic cores, and then the multiple electromagnetic suction cups are energized to adsorb the multiple magnetic cores respectively, and then the third electric push rod 27 is started to retract the telescopic end, so that the material picking plate 26 takes the multiple magnetic cores out of the multi-track guide rail 15 through the multiple electromagnetic suction cups, and then the second screw rod 14 is driven in reverse to rotate so that the second slide 13 moves to above the moving seat 16, and then the third electric push rod 27 is started to push out the telescopic end so that the material picking plate 26 drives the multiple electromagnetic suction cups to move downward, and the multiple magnetic cores are placed in the multiple grooves on the moving seat 16, and then the electromagnetic suction cups are de-energized, and then the third electric push rod 27 is started to retract the telescopic end, so that the material picking plate 26 drives the multiple electromagnetic suction cups to move upward and separate from the multiple magnetic cores, thereby completing the loading operation.

[0025] As mentioned above, the drying component is preferably provided with the following structure: The drying assembly includes a drying box 2 slidably connected to one side of a fixed frame 3 and a fixed plate 30 fixed in the drying box 2, a heating plate 29 is fixedly installed at the bottom of the fixed plate 30, a through groove matching the top of the movable seat 16 is provided at the bottom of the drying box 2, a slide 32 whose bottom end slides through the fixed plate 30 is slidably connected in the drying box 2, two sealing plates 28 are symmetrically arranged above the through groove in the drying box 2, one end of the two sealing plates 28 is respectively horizontally slidably connected to the inner side of the drying box 2, and the other end of the two sealing plates 28 is respectively rotatably connected to the bottom ends of both sides of the slide 32; A slider 33 is vertically slidably connected to the top of the fixed plate 30. Two slide grooves 31 are symmetrically arranged on the top of the fixed plate 30. A slide shaft is slidably connected in the two slide grooves 31. The outer sides of the two slide shafts are rotatably connected to the first connecting rod 35 and the second connecting rod 36. One end of the two first connecting rods 35 is rotatably connected to the two sides of the slider 33, and one end of the two second connecting rods 36 is rotatably connected to the two ends of the slide frame 32. A fourth screw rod 34 is rotatably provided at the top of the fixing frame 3 , and the bottom end of the fourth screw rod 34 slides through the top of the drying box 2 and is screwed and connected with the slider 33 .

[0026] As can be seen from the above, when the movable seat 16 drives the magnetic core after the silver paste is transferred to the bottom of the drying assembly, the fourth screw rod 34 is driven to rotate, so that the screw-connected slider 33 moves down along the fourth screw rod 34, and the heating plate 29 is energized to keep the space below the fixed plate 30 in the drying box 2 at a high temperature. Since the drying box 2 is located above the movable seat 16 and the drying box 2 is not in contact with the movable seat 16, the gravity of the drying box 2 and the fixed plate 30 applies a downward force to the two first connecting rods 35 through the two slide grooves 31 and the two sliding shafts in the two slide grooves 31, respectively, so that the ends of the two first connecting rods 35 connected to the sliding shafts have a tendency to move toward the middle. , so that the ends of the two second connecting rods 36 connected to the sliding shaft also have a tendency to move toward the middle, so that the other ends of the two second connecting rods 36 drive the slide 32 to move downward in the drying box 2, so that the bottom of the slide 32 always conflicts with the bottom of the drying box 2, so that the two sealing plates 28 keep the bottom of the sealed box in a closed state to prevent the heat in the drying box 2 from being lost. At the same time, before the bottom of the drying box 2 contacts the top of the movable seat 16, the drying box 2 and the fixed plate 30 move downward synchronously with the slider 33 until the through groove at the bottom of the drying box 2 is sleeved on the movable seat 16, and a closed space is formed between the movable seat 16 and the drying box 2. Then, the fourth screw rod 34 is driven to rotate to make the slider 33 continue to move downward. At this time, the moving seat 16 supports the drying box 2, so that the fixed plate 30 cannot move downward, thereby making the slider 33 move downward relative to the fixed plate 30 in the drying box 2, so that the two first connecting rods 35 push the two sliding shafts to slide in the two sliding grooves 31 to both sides respectively, and then the ends of the two second connecting rods 36 push the slide 32 to move up in the drying box, thereby driving one end of the two sealing plates 28 to move upward in the drying box 2, so that the other ends of the two sealing plates 28 slide to both sides in the drying box 2, so that the upper closed space of the moving seat 16 is connected with the space below the fixed plate 30 in the drying box 2, and then the magnetic core on the moving seat 16 is dried, thereby avoiding the heat loss in the drying box 2 and reducing the use of energy; After the magnetic core is dried, the fourth screw rod 34 is driven in the reverse direction to rotate and the slider 33 moves up. Before the drying box 2 is separated from the movable seat 16, due to the gravity of the drying box 2 and the fixed plate 30, the slider 33 drives the two first connecting rods 35 to make the two sliding shafts in the two sliding grooves 31 above the fixed plate 30 move toward the middle, so that the slide frame moves down in the drying box 2 through the two second connecting rods 36 until the bottom end of the slide frame 32 contacts the bottom of the drying box 2, and at the same time, the two sealing plates 28 re-seal the bottom of the drying box 2, and then continue to move the slider 33 up. At this time, the slide frame 32 cannot move down, so that the sliding shaft cannot move along the sliding groove 31 through the second connecting rod 36, so that the slider 33 pulls the sliding groove 31 upward through the two first connecting rods 35 and the sliding shaft, thereby driving the fixed plate 30 and the drying box 2 to move up, and in this process, the bottom of the drying box 2 is first sealed before driving the drying box 2 to move up, and there is no heat loss.

[0027] In addition, with regard to the unloading assembly, the unloading assembly preferably includes an unloading frame 22 fixed on the frame 1 and a pusher frame 19 slidably connected to the frame 1, a second electric push rod 20 is fixedly mounted on the frame 1, and the pusher frame 19 is fixedly connected to the telescopic end of the second electric push rod 20. Based on this, after the drying assembly moves upward, the second electric push rod 20 is started to push out the telescopic end, so that the pusher frame 19 approaches the moving seat 16 and pushes out the magnetic cores in the multiple grooves of the moving seat 16 toward the unloading frame 22, until all the multiple magnetic cores fall into the unloading frame 22 for collection, and then the second electric push rod 20 is started to push back the telescopic end, so that the pusher frame 19 is away from the moving seat 16, and then the moving seat 16 can be moved to the bottom of the loading assembly to perform the next pad printing operation, thereby achieving continuous work and improving production efficiency.

[0028] A method for pad printing conductive silver paste on a magnetic core surface comprises the following steps: Step 1: Slide the movable seat 16 to the bottom of the loading assembly, and use the loading assembly to transfer the multiple magnetic cores to the multiple grooves on the movable seat 16 respectively; Step 2: Slide the movable seat 16 to the bottom of the pad printing assembly, slide the first slide 5 to drive the lifting frame 6 and the pad printing head 11 to move above the pad printing pattern in the silver paste box 10, and while the first slide 5 moves, the mounting frame 7 drives the rotating frame 8 to move synchronously, so that the rotating plate 24 drives the slide bar 38 to move in the groove on the guide plate 23. At this time, a hypotenuse of the parallelogram on the inner side of the groove on the guide plate 23 guides the slide bar 38 to the lower half of the groove, so that the slide bar 38 pushes The movable rotating plate 24 drives the rotating frame 8 to rotate, so that the bottom of the scraper 9 contacts the inner bottom surface of the silver paste box 10, and the push rod 25 is separated from the inner bottom surface of the silver paste box 10. When the slide bar 38 moves and slides along the lower groove, the scraper 9 scrapes the excess silver paste in the pad printing pattern back to the end of the silver paste box 10, and then the lifting frame 6 is moved down to make the bottom of the pad printing head 11 extend into the silver paste box 10 and pick up the silver paste from the pad printing pattern, and then the lifting frame 6 is moved up to move the pad printing head 11 out of the silver paste box 10; Step 3: Slide the first slide 5 to drive the lifting frame 6 and the pad printing head 11 to move to the top of the moving seat 16. When the first slide 5 moves, the mounting frame 7 drives the rotating frame 8 to move synchronously, so that the rotating plate 24 drives the slide bar 38 to move in the groove on the guide plate 23. The other oblique side of the parallelogram on the inner side of the groove on the guide plate 23 guides the slide bar 38 to the upper half of the groove, so that the slide bar 38 pushes the rotating plate 24 to drive the rotating frame 8 to rotate, so that the bottom of the scraper 9 is separated from the inner bottom surface of the silver paste box 10, and the push rod 25 contacts the inner bottom surface of the silver paste box 10. When the slide bar 38 moves and slides along the upper half of the groove, the push rod 25 pushes the silver paste to the top of the pad printing pattern, and then the lifting frame 6 is moved down to make the bottom of the pad printing head 11 contact with the multiple magnetic core surfaces on the moving seat 16 and apply a set pressure, so that the stained silver paste is transferred to the surface of the magnetic core, and then the lifting frame 6 is moved up to separate the pad printing head 11 from the magnetic core; Step 4: Slide the movable seat 16 to the bottom of the drying assembly, slide the drying assembly downward so that the drying assembly is sleeved on the outer side of the movable seat, and allow the drying assembly to dry the silver paste on the surface of the magnetic core; Step 5: After the silver paste on the surface of the magnetic core is dried, move the drying assembly upward, and then use the blanking assembly to push the magnetic core out of the blanking.

[0029] This method drives the magnetic core to perform loading, pad printing, drying and unloading operations in sequence through the movement of the movable seat 16, thereby realizing the automated production of the conductive silver paste pad printing operation on the surface of the magnetic core, is suitable for mass production, and greatly improves the efficiency of the production of the magnetic core; in addition, the setting of the guide plate 23 greatly reduces the manufacturing cost of the device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conductive silver paste pad printing device for a magnetic core surface, characterized in that: It comprises a frame (1) and a loading assembly, a pad printing assembly, a drying assembly and a unloading assembly arranged on the frame (1), the drying assembly being slidably arranged above the unloading assembly, a movable seat (16) being slidably connected to the frame (1), and a groove for accommodating a magnetic core being provided on the movable seat (16); The pad printing assembly comprises a fixed frame (3) fixed on a frame (1) and a silver paste box (10) fixed on one side of the fixed frame (3); a pad printing pattern is provided on the inner bottom surface of the silver paste box (10); a first slide seat (5) is slidably connected to one side of the fixed frame (3) located above the silver paste box (10); a mounting frame (7) is fixedly mounted on one side of the first slide seat (5); a lifting frame (6) is vertically slidably connected to one side of the first slide seat (5); a pad printing head (11) is fixedly mounted on the bottom of the lifting frame (6); a rotating frame (8) of an inverted V-shaped structure is rotatably connected to the bottom of the rotating frame (8); a scraper (9) and a push rod (25) are respectively fixedly connected to the two ends of the bottom of the rotating frame (8); A guide rail plate (23) is fixedly mounted on one side of the fixed frame (3), and a groove communicating end to end is provided on one side of the guide rail plate (23). A rotating plate (24) is fixedly mounted on the rotating frame (8), and a sliding rod (38) is fixedly mounted on one side of the rotating plate (24). The sliding rod (38) is slidably fitted in the groove, and the inner side of the groove is a parallelogram structure.

2. The conductive silver paste pad printing device for a magnetic core surface according to claim 1, characterized in that: The pad printing assembly further comprises a baffle (39) fixed on the frame (1) and a fork material rack (17) slidably connected to the frame (1), the baffle (39) and the fork material rack (17) being respectively located on two sides of the movable seat (16), a first electric push rod (18) being fixedly mounted on the frame (1), and the fork material rack (17) being fixedly connected to the telescopic end of the first electric push rod (18).

3. The conductive silver paste pad printing device for a magnetic core surface according to claim 1, characterized in that: The fixing frame (3) is rotatably provided with a first screw rod (4) which is screwed through the first slide seat (5), and the top of the fixing frame (3) is rotatably provided with a fifth screw rod (37) which is screwed at the bottom and extends into the top of the lifting frame (6).

4. The conductive silver paste pad printing device for a magnetic core surface according to claim 1, characterized in that: A third screw rod (21) is rotatably provided on the frame (1), and the third screw rod (21) is screwed and penetrates the movable seat (16).

5. The conductive silver paste pad printing device for a magnetic core surface according to claim 1, characterized in that: The loading assembly comprises a material taking frame (12) fixed on the frame (1) and a multi-track guide rail (15) for storing magnetic cores, the material taking frame (12) is slidably connected to a second slide seat (13), a second screw rod (14) is rotatably provided on the material taking frame (12) and is screwed through the second slide seat (13), a third electric push rod (27) is fixedly installed at the bottom of the second slide seat (13), a material taking plate (26) is fixedly installed at the bottom end of the third electric push rod (27), and a plurality of electromagnetic suction cups corresponding to a plurality of grooves on the moving seat (16) are provided at the bottom of the material taking plate (26).

6. The conductive silver paste pad printing device for a magnetic core surface according to claim 1, characterized in that: The material unloading assembly comprises a material unloading frame (22) fixed on the frame (1) and a material pushing frame (19) slidably connected to the frame (1); a second electric push rod (20) is fixedly mounted on the frame (1); and the material pushing frame (19) is fixedly connected to the telescopic end of the second electric push rod (20).

7. The conductive silver paste pad printing device for a magnetic core surface according to claim 1, characterized in that: The drying assembly comprises a drying box (2) slidably connected to one side of a fixed frame (3) and a fixed plate (30) fixed in the drying box (2); a heating plate (29) is fixedly mounted on the bottom of the fixed plate (30); a through groove matching the top of the movable seat (16) is provided at the bottom of the drying box (2); a slide (32) is slidably connected in the drying box (2) and the bottom end of the slide slides through the fixed plate (30); two sealing plates (28) are symmetrically arranged above the through groove in the drying box (2); one end of the two sealing plates (28) is horizontally slidably connected to the inner side of the drying box (2), and the other end of the two sealing plates (28) is rotatably connected to the bottom ends of both sides of the slide (32).

8. The conductive silver paste pad printing device for a magnetic core surface according to claim 7, characterized in that: A slider (33) is vertically slidably connected to the top of the fixed plate (30), two slide grooves (31) are symmetrically provided on the top of the fixed plate (30), a slide shaft is slidably connected in the two slide grooves (31), a first connecting rod (35) and a second connecting rod (36) are rotatably connected to the outer sides of the two slide shafts, one end of the two first connecting rods (35) is rotatably connected to the two sides of the slider (33), and one end of the two second connecting rods (36) is rotatably connected to the two ends of the slide frame (32).

9. The conductive silver paste pad printing device for a magnetic core surface according to claim 8, characterized in that: A fourth screw rod (34) is rotatably provided at the top of the fixing frame (3), and the bottom end of the fourth screw rod (34) slides through the top of the drying box (2) and is screwed together with the slider (33).

10. A method for pad printing conductive silver paste on the surface of a magnetic core performed by the pad printing device for conductive silver paste on the surface of a magnetic core according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Slide the movable seat (16) to the bottom of the loading assembly, and use the loading assembly to transfer the plurality of magnetic cores to the plurality of grooves on the movable seat (16); Step 2: The sliding movable seat (16) moves to the bottom of the pad printing assembly, and the first sliding seat (5) drives the lifting frame (6) and the pad printing head (11) to move to the top of the pad printing pattern in the silver paste box (10). When the first sliding seat (5) moves, the mounting frame (7) drives the rotating frame (8) to move synchronously, so that the rotating plate (24) drives the sliding rod (38) to move in the groove on the guide plate (23). At this time, a hypotenuse of the parallelogram on the inner side of the groove on the guide plate (23) guides the sliding rod (38) to the lower half of the groove, so that the sliding rod (38) pushes The movable rotating plate (24) drives the rotating frame (8) to rotate, so that the bottom of the scraper (9) contacts the inner bottom surface of the silver paste box (10), and the push rod (25) is separated from the inner bottom surface of the silver paste box (10), and then the slide bar (38) slides along the groove of the lower half, and the scraper (9) scrapes the excess silver paste in the pad printing pattern back to the end of the silver paste box (10), and then the lifting frame (6) is moved downward to make the bottom of the pad printing head (11) extend into the silver paste box (10) and pick up the silver paste from the pad printing pattern, and then the lifting frame (6) is moved upward to make the pad printing head (11) move out of the silver paste box (10); Step 3: Slide the first slide (5) to drive the lifting frame (6) and the pad printing head (11) to move to the top of the moving seat (16). When the first slide (5) moves, the mounting frame (7) drives the rotating frame (8) to move synchronously, so that the rotating plate (24) drives the slide bar (38) to move in the groove on the guide plate (23). The other oblique side of the parallelogram on the inner side of the groove on the guide plate (23) guides the slide bar (38) to the upper part of the groove, so that the slide bar (38) pushes the rotating plate (24) to drive the rotating plate (24). The frame (8) rotates so that the bottom of the scraper (9) is separated from the inner bottom surface of the silver paste box (10), and the push rod (25) contacts the inner bottom surface of the silver paste box (10), and then the slide rod (38) slides along the upper groove, and the push rod (25) pushes the silver paste to the top of the pad printing pattern, and then the lifting frame (6) is moved downward to make the bottom of the pad printing head (11) contact with the surfaces of multiple magnetic cores on the movable seat (16) and apply a set pressure, so that the silver paste is transferred to the surface of the magnetic core, and then the lifting frame (6) is moved upward to separate the pad printing head (11) from the magnetic core; Step 4: Slide the movable seat (16) to the bottom of the drying assembly, slide the drying assembly downward so that the drying assembly is sleeved on the outside of the movable seat (16), and allow the drying assembly to dry the silver paste on the surface of the magnetic core; Step 5: After the silver paste on the surface of the magnetic core is dried, move the drying assembly upward, and then use the blanking assembly to push the magnetic core out of the blanking.

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