Printing ink screen printing device

Abstract

The utility model relates to an ink screen printing device which comprises a base, a jig bottom frame is fixedly connected to the top wall of the base, a jig top plate is placed on the edge of the top side of the jig bottom frame, a longitudinal positioning block and a transverse positioning block are fixedly connected to the bottom wall of the jig top plate, and fine adjustment indexing rotating rods are arranged on the front side wall and the transverse side wall of the jig bottom frame. The surface of the jig top plate is used for placing a circuit board, the base is fixedly connected with a stand column, the stand column is slidably provided with a vertical sliding seat, the stand column is provided with a vertical lead screw mechanism, a lead screw nut of the vertical lead screw mechanism is fixedly connected with the vertical sliding seat, the vertical sliding seat is in a transverse cuboid shape, the vertical sliding seat is slidably provided with a transverse sliding seat, the vertical sliding seat is provided with two synchronous wheels, and the synchronous wheels are arranged on the two synchronous wheels. A synchronous belt is wound around the two synchronous wheels, the belt section of the synchronous belt is fixedly connected with a transverse sliding seat, the transverse sliding seat is fixedly connected with a mounting seat, and the mounting seat is slidably connected with two scraping plates. According to the utility model, the circuit board can be accurately and reliably positioned, so that the ground color ink layer can be uniformly distributed on the surface of the circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB silk screen printing, in particular to an ink silk screen printing device. Background Art

[0002] PCBs require printing ink to insulate the circuits. After the base ink layer is applied, a second layer of markings is printed on the surface of the base ink layer to facilitate soldering and positioning of components like capacitors and resistors.

[0003] The printing of the base ink layer is particularly critical. The thickness of the base ink layer needs to be uniform everywhere so that there will be no tiny bumps in the base ink layer after drying, and the subsequent welding accuracy of electrical components can be ensured to ensure the overall quality of the circuit board.

[0004] In the prior art, before the base ink layer is printed, the circuit board is not accurately and reliably positioned and fixed, resulting in the circuit board spontaneously tilting and jumping slightly during the printing process, which causes the base ink layer to fail to be evenly distributed on the circuit board, resulting in the formation of fine bumps after drying. Utility Model Content

[0005] The purpose of the utility model is to provide an ink screen printing device, which can accurately and reliably position a circuit board, thereby ensuring that a base color ink layer can be evenly distributed on the surface of the circuit board.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An ink screen printing device includes a base, a jig bottom frame is fixedly connected to the top wall of the base, a jig top plate is placed on the top side edge of the jig bottom frame, a longitudinal positioning block and a transverse positioning block are fixedly connected to the bottom wall of the jig top plate, the front side wall and the transverse side wall of the jig bottom frame are provided with a fine-tuning indexing rotating rod, the surface of the jig top plate is used to place a circuit board, a column is fixedly connected to the base, the column is slidably provided with a vertical slide, the column is provided with a vertical screw mechanism, the screw nut of the vertical screw mechanism is fixedly connected to the vertical slide, the vertical slide is a transverse rectangular parallelepiped, the vertical slide is slidably provided with a transverse slide, the vertical slide is provided with two synchronous wheels, two The synchronous wheel is wound with a synchronous belt, a section of the synchronous belt is fixedly connected to the transverse slide, the transverse slide is fixedly connected to a mounting seat, the mounting seat is slidably connected to two scrapers, the scrapers can move vertically relative to the mounting seat, the mounting seat is fixedly connected to two vertical cylinders, the piston rods of the vertical cylinders are fixedly connected to the scrapers matched therewith, the vertical slide is fixedly connected to two mounting racks, the mounting racks are fixedly connected to mounting grooves, the grooves of the mounting grooves are laterally facing inward, the upper groove walls of the mounting grooves are threadedly connected to a number of clamping parts, the two mounting grooves jointly support a film pressing frame, the horizontal side frame bars of the film pressing frame and the lower groove wall of the mounting grooves jointly press the ink color film.

[0008] Specifically, the top wall of the jig top plate is provided with a contoured countersunk hole, which is used to place the circuit board. A secondary countersunk hole is provided in the middle of the contoured countersunk hole, and an exhaust hole is provided on the bottom wall of the secondary countersunk hole. An exhaust channel is provided in the jig top plate, one end of the exhaust channel is connected to the exhaust hole, and the other end of the exhaust channel is connected to negative pressure.

[0009] Specifically, a connecting strip is fixedly connected to the outer wall of the installation groove strip, a dovetail groove is provided on the outer wall of the connecting strip, and a dovetail convex strip is provided on the inner side wall of the mounting frame, and the dovetail convex strip is slidably matched with the dovetail groove.

[0010] Specifically, the front end of the mounting groove is fixedly connected to a mounting plate, the mounting plate is rotatably connected to a fine-tuning screw, and the fine-tuning screw is threadedly connected to the front end of the mounting bracket.

[0011] Specifically, the middle section of the pressing piece is a threaded section, and the bottom of the pressing piece is a pressing disc.

[0012] Specifically, a protrusion is provided on the lateral side wall of the bottom frame of the jig, and a fine-tuning hole is provided on the protrusion. A locking screw is threadedly connected to the lateral edge of the bottom wall of the top plate of the jig, and the locking screw passes through the fine-tuning hole. A rotating handle is fixed to the bottom end of the locking screw, and the locking screw is fixed to a locking disk. The locking disk is located on the lower side of the bottom wall of the protrusion.

[0013] Specifically, the two scrapers are arranged in the longitudinal direction, two sliding rods are fixedly connected to the top of the scrapers, a guide sliding sleeve is fixedly passed through the mounting seat, and the sliding rod is slidably passed through the guide sliding sleeve.

[0014] Specifically, the scraper is fixedly connected to a scraper blade, and the scraper blade is made of a heat-conducting material.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] After the jig top plate of the utility model is placed on the top side edge of the jig bottom frame, the position of the jig top plate can be fine-tuned by the fine-tuning indexing rotating rod on the front side and the fine-tuning indexing rotating rod on the side. In addition, after the circuit board is placed in the contoured countersunk hole, the secondary countersunk hole on the lower side will generate negative pressure to tightly adsorb it, thereby ensuring the accurate and reliable positioning of the circuit board, thereby ensuring the quality of subsequent printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a three-dimensional view of the ink screen printing device;

[0019] Figure 2 It is a partial view of the ink screen printing device;

[0020] Figure 3 This is a view of the jig top plate and related structures;

[0021] Figure 4 It is a partial view of the ink screen printing device;

[0022] Figure 5 It is a partial view of the ink screen printing device;

[0023] Figure 6 This is a partial view of the ink screen printing device.

[0024] In the picture:

[0025] 1. Jig bottom frame; 11. Jig top plate; 111. Longitudinal positioning block; 112. Horizontal positioning block; 113. Contoured countersunk hole; 114. Secondary countersunk hole; 115. Exhaust hole; 12. Fine-tuning indexing rod; 13. Circuit board; 14. Bump; 141. Fine-tuning avoidance hole; 15. Locking screw; 151. Locking plate;

[0026] 2. Vertical column; 21. Vertical slide; 211. Synchronous pulley; 212. Synchronous belt; 22. Vertical screw mechanism; 23. Horizontal slide; 24. Mounting bracket; 241. Dovetail rib;

[0027] 3. Mounting seat; 31. Vertical cylinder; 32. Guide sleeve;

[0028] 4. Scraper; 41. Sliding rod; 42. Scraper;

[0029] 5. Install the groove; 51. Pressing piece; 52. Connecting strip; 53. Install the plate; 54. Fine-tuning screw;

[0030] 6. Film pressing frame;

[0031] 7. Ink color film. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See Figures 1 to 6An ink screen printing device includes a base, the top wall of which is fixedly connected to a jig base frame 1. A jig top plate 11 is placed on the top edge of the jig base frame 1. A longitudinal positioning block 111 and a lateral positioning block 112 are fixedly connected to the bottom wall of the jig top plate 11. Fine-tuning indexing rods 12 are provided on the front and lateral side walls of the jig base frame 1. A circuit board 13 is placed on the surface of the jig top plate 11.

[0034] A vertical column 2 is fixedly attached to the base, and a vertical slide 21 is slidably mounted on the column 2. A vertical screw mechanism 22 is mounted on the column 2, and the screw nut of the vertical screw mechanism 22 is fixedly mounted on the vertical slide 21. The vertical slide 21 is a horizontal rectangular parallelepiped, and a horizontal slide 23 is slidably mounted on the vertical slide 21. The vertical slide 21 is equipped with two synchronous pulleys 211, which are wrapped with a synchronous belt 212. A section of the synchronous belt 212 is fixedly mounted on the horizontal slide 23.

[0035] The horizontal slide 23 is fixedly connected to a mounting base 3, and the mounting base 3 is slidably connected to two scrapers 4, which can move vertically relative to the mounting base 3. The mounting base 3 is fixedly connected to two vertical cylinders 31, and the piston rods of the vertical cylinders 31 are fixedly connected to the scrapers 4 matched therewith.

[0036] The vertical slide 21 is fixedly connected to two mounting brackets 24, which are fixed to mounting grooves 5, with the grooves of the mounting grooves 5 facing inward. Several compression members 51 are threadedly connected to the upper wall of the mounting grooves 5. The two mounting grooves 5 jointly support a film pressing frame 6. The lateral side bars of the film pressing frame 6 and the lower wall of the mounting grooves 5 work together to compress the ink film 7.

[0037] Specifically, the top wall of the jig top plate 11 is provided with a contoured countersunk hole 113 for accommodating the circuit board 13. A secondary countersunk hole 114 is located in the middle of the contoured countersunk hole 113, and an air extraction hole 115 is located on the bottom wall of the secondary countersunk hole 114. An air extraction channel (not shown) is provided within the jig top plate 11. One end of the air extraction channel is connected to the air extraction hole 115, and the other end is connected to a negative pressure source (not shown).

[0038] Specifically, a connecting strip 52 is fixedly connected to the outer wall of the installation groove 5 , a dovetail groove is provided on the outer wall of the connecting strip 52 , and a dovetail convex strip 241 is provided on the inner side wall of the mounting frame 24 , and the dovetail convex strip 241 is slidably matched with the dovetail groove.

[0039] Specifically, a mounting plate 53 is fixed to the front end of the mounting groove 5 , a fine-tuning screw 54 is rotatably connected to the mounting plate 53 , and the fine-tuning screw 54 is threadedly connected to the front end of the mounting bracket 24 .

[0040] Specifically, the middle section of the pressing member 51 is a threaded section, and the bottom of the pressing member 51 is a pressing disc.

[0041] Specifically, a protrusion 14 is provided on the lateral sidewall of the jig bottom frame 1, and a fine-tuning hole 141 is provided on the protrusion 14. A locking screw 15 is threadedly connected to the lateral edge of the bottom wall of the jig top plate 11, and the locking screw 15 passes through the fine-tuning hole 141. A rotating handle is fixed to the bottom end of the locking screw 15, and a locking plate 151 is fixed to the locking screw 15. The locking plate 151 is located on the lower side of the bottom wall of the protrusion 14.

[0042] Specifically, the two scrapers 4 are arranged in the longitudinal direction, and two slide bars 41 are fixedly connected to the top of the scrapers 4. The mounting base 3 is fixedly provided with a guide sleeve 32, and the slide bar 41 is slidably provided in the guide sleeve 32.

[0043] Specifically, the scraper 4 is fixed with a scraper blade 42 , and the scraper blade 42 is made of a heat-conducting material.

[0044] The working principle of the ink screen printing device of this utility model is as follows:

[0045] First, place the jig top plate 11 on the top side of the edge of the jig bottom frame 1, so that the longitudinal positioning block 111 abuts the front fine-tuning indexing rod 12, and the transverse positioning block 112 abuts the side fine-tuning indexing rod 12. By adjusting the front fine-tuning indexing rod 12 and the side fine-tuning indexing rod 12, the position of the jig top plate 11 can be fine-tuned. After adjusting the position of the jig top plate 11, swing the handle at the bottom end of the locking screw 15 to move the adjustment locking screw 15 upward in the axial direction, thereby moving the locking plate 151 upward and pressing the protrusion 14, thereby fixing the jig top plate 11 on the top side of the edge of the jig bottom frame 1, and achieving the positioning of the jig top plate 11.

[0046] Next, the unprinted circuit board 13 is placed in the contoured countersunk hole 113, which is sized to fit the circuit board 13, securing it in place. Next, a negative pressure device (not shown) is activated, causing the exhaust holes 115 to draw air, thereby creating a negative pressure in the secondary countersunk hole 114. This firmly attaches the circuit board 13 to the contoured countersunk hole 113, securing it in place.

[0047] Next, the lateral edges of the ink film 7 are placed in the notches of the mounting grooves 5 on both sides, and the film pressing frame 6 is placed in the notches of the mounting grooves 5 on both sides, so that the lateral frames of the film pressing frame 6 press against the lateral edges of the ink film 7. Next, the pressing members 51 are twisted so that they jointly press against the lateral frames of the film pressing frame 6, thereby pressing the ink film 7.

[0048] Next, the vertical screw mechanism 22 controls the vertical movement of the vertical slide 21, thereby controlling the downward movement of the vertical slide 21, causing the ink film 7 to move downward until it rests against the top wall of the printed circuit board 13. Subsequently, the synchronous belt 212 drives the mounting base 3 in a reciprocating lateral motion, driving the two scrapers 42 to sweep back and forth across the top wall of the ink film 7. During this process, the scraper 4 is powered and generates heat, which is transferred to the scrapers 42, causing them to heat up, thereby heating the ink film 7, causing it to melt and thus print ink on the top wall of the printed circuit board 13.

[0049] The circuit board 13 will clean away the ink covering the surface of the copper wires during the subsequent cleaning process.

[0050] After the jig top plate 11 of the present invention is placed on the top side edge of the jig bottom frame 1, the position of the jig top plate 11 can be fine-tuned by the fine-tuning indexing rotating rod 12 on the front side and the fine-tuning indexing rotating rod 12 on the side. In addition, after the circuit board 13 is placed in the contoured countersunk hole 113, the secondary countersunk hole 114 on the lower side will generate negative pressure to tightly adsorb it, thereby ensuring the accurate and reliable positioning of the circuit board 13, thereby ensuring the quality of subsequent printing.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An ink screen printing device, characterized in that: The utility model comprises a base, the top wall of the base is fixedly connected to the jig bottom frame, the top side edge of the jig bottom frame is placed on the jig top plate, the bottom wall of the jig top plate is fixedly connected to the longitudinal positioning block and the transverse positioning block, the front side wall and the transverse side wall of the jig bottom frame are provided with a fine-tuning indexing rotating rod, the surface of the jig top plate is used to place the circuit board, the base is fixedly connected to the column, the column is slidably provided with a vertical slide, the column is provided with a vertical screw mechanism, the screw nut of the vertical screw mechanism is fixedly connected to the vertical slide, the vertical slide is a transverse cuboid, the vertical slide is slidably provided with a transverse slide, the vertical slide is provided with two synchronous wheels, and the two synchronous wheels rotate around A synchronous belt is provided, a section of the synchronous belt is fixedly connected to the transverse slide, the transverse slide is fixedly connected to a mounting seat, the mounting seat is slidably connected to two scrapers, the scrapers can move vertically relative to the mounting seat, the mounting seat is fixedly connected to two vertical cylinders, the piston rods of the vertical cylinders are fixedly connected to the scrapers matched therewith, the vertical slide is fixedly connected to two mounting racks, the mounting racks are fixedly connected to mounting grooves, the grooves of the mounting grooves are laterally facing inward, the upper groove walls of the mounting grooves are threadedly connected to a number of clamping parts, the two mounting grooves jointly support a film pressing frame, the horizontal side frame bars of the film pressing frame and the lower groove wall of the mounting grooves jointly press the ink color film.

2. The ink screen printing device according to claim 1, characterized in that: The top wall of the jig top plate is provided with a contoured countersunk hole, which is used to place the circuit board. A secondary countersunk hole is provided in the middle of the contoured countersunk hole, and an exhaust hole is provided on the bottom wall of the secondary countersunk hole. An exhaust channel is provided in the jig top plate, one end of the exhaust channel is connected to the exhaust hole, and the other end of the exhaust channel is connected to a negative pressure.

3. The ink screen printing device according to claim 1, characterized in that: The outer wall of the installation groove is fixed with a connecting strip, the outer wall of the connecting strip is provided with a dovetail groove, the inner side wall of the installation frame is provided with a dovetail convex strip, and the dovetail convex strip is slidably matched with the dovetail groove.

4. The ink screen printing device according to claim 1, characterized in that: The front end of the mounting groove is fixedly connected with a mounting plate, the mounting plate is rotatably connected with a fine-tuning screw, and the fine-tuning screw is threadedly connected to the front end of the mounting frame.

5. The ink screen printing device according to claim 1, characterized in that: The middle section of the pressing piece is a threaded section, and the bottom of the pressing piece is a pressing disc.

6. The ink screen printing device according to claim 1, characterized in that: The lateral side wall of the bottom frame of the jig is provided with a protrusion, and the protrusion is provided with a fine-tuning air-avoiding hole. The lateral edge of the bottom wall of the top plate of the jig is threadedly connected with a locking screw, which passes through the fine-tuning air-avoiding hole. The bottom end of the locking screw is fixed with a rotating handle, and the locking screw is fixed with a locking disk. The locking disk is located on the lower side of the bottom wall of the protrusion.

7. The ink screen printing device according to claim 1, characterized in that: The two scrapers are arranged in the longitudinal direction. Two sliding rods are fixedly connected to the top of the scrapers. A guide sliding sleeve is fixedly passed through the mounting seat, and the sliding rod is slidably passed through the guide sliding sleeve.

8. The ink screen printing device according to claim 1, characterized in that: The scraper is fixed with a scraper blade, which is made of heat-conducting material.

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