Automatic silk screen printing device for chamfering mark of shading sheet

Abstract

The present invention relates to the technical field of printing devices, and in particular to an automatic silk-screen printing device for marking the chamfer of a shading sheet, comprising a table and a bracket, a lifting electric cylinder is installed on the upper side of the bracket, a positioning shell is fixed to the telescopic end of the lifting electric cylinder, and further comprising: a positioning mechanism arranged on the positioning shell for positioning the shading sheet; a fixed cylinder is fixed to the lower end of the positioning shell, a rotating cylinder is rotatably connected to the lower end of the fixed cylinder, and three marking mechanisms arranged in a circle are inserted at the lower end of the rotating cylinder. The present invention first positions the shading sheet through the positioning mechanism, and then drives the three marking mechanisms to separate synchronously through the driving mechanism, so that the marking ball in each marking mechanism is attached to the chamfered surface of the inner hole of the shading sheet, and a marking point is generated on the chamfered surface of the inner hole of the shading sheet, so that a mark can be made on the chamfer of the inner hole of the shading sheet, so as to facilitate the simple and rapid distinction between the front and back sides of the shading sheet, and prevent the shading sheet from being installed upside down when the lens is assembled.

Description

Technical Field

[0001] The invention relates to the technical field of printing devices, and in particular to an automatic silk-screen printing device for chamfering marking of a light-shielding sheet. Background Art

[0002] In order to improve the imaging effect of the camera, a shading sheet needs to be installed in the lens. Since the base material in the middle of the lens shading sheet is PET material, and the upper and lower parts are carbon-coated, after precision punching, its cut surface has a mirror effect. The light is reflected by the smooth cut surface, which produces lens stray light. Chamfering the middle ring of the shading sheet can better reduce mirror reflection, thereby effectively reducing glare.

[0003] When assembling the light shield in the camera lens, the side with the chamfer needs to face outward, so as to reduce the reflection at the edge of the inner hole of the light shield. However, for a smaller camera lens, the size of the light shield is also smaller, and the light shield is usually black, which makes it difficult to distinguish the side where the chamfer of the light shield is located during assembly. Therefore, it is easy to install the light shield upside down, which fails to reduce the reflection.

[0004] Therefore, an additional processing step is needed in the production of the shading sheet, that is, to mark the chamfered surface of the inner hole of the shading sheet through a printing device. During assembly, the chamfered surface can be determined by observing the mark, which reduces the difficulty of assembling the shading sheet and ensures the accuracy of the assembly direction of the shading sheet.

[0005] After searching, the Chinese patent with announcement number: CN109454987B discloses an automatic rolling printing device for plastic products, including a base, a horizontally movable printing mechanism, a product mounting table, a printing support table, an ink loading table and a plastic product. The horizontally movable printing mechanism includes two sliding rods, four limit blocks, two positioning sliders, roller track one, roller track two and a printing roller. A lower track is provided on the arc-shaped slide rail, an upper track is provided on the roller track two, a support rod is slidably provided in the upper track, an arc-shaped rack is provided at the bottom of the lower track, a rotating gear is provided in the two lower tracks, a rotating shaft is provided between the two rotating gears, the printing roller is arranged on the rotating shaft, an L-shaped support plate is provided at the lower end of the two support rods, a rotating motor is provided on the L-shaped support plate, and the output shaft of the rotating motor is connected to the rotating shaft.

[0006] Based on the above search and combined with actual problems, it was found that: it is difficult for existing printing devices to print marks on the chamfers of smaller shading sheets. First, it is impossible to position the shading sheets with a very small volume. Second, since the surface area of ​​the chamfer of the shading sheet is very small, the mark cannot be accurately made on the chamfered surface. If the mark is offset to other positions of the shading sheet except the chamfer, it is easy to contact with other objects and cause the mark to be erased. Summary of the invention

[0007] The object of the present invention is to provide an automatic silk screen printing device for chamfering marking of a shading sheet, so as to solve the problems raised in the above-mentioned background technology.

[0008] The technical solution of the present invention is: an automatic silk-screen printing device for chamfering marking of a shading sheet, comprising a table and a bracket, a lifting electric cylinder is installed on the upper side of the bracket, a positioning shell is fixed to the telescopic end of the lifting electric cylinder, and also includes: a positioning mechanism arranged on the positioning shell for positioning the shading sheet; a fixed cylinder is fixed to the lower end of the positioning shell, the lower end of the fixed cylinder is rotatably connected to a rotating cylinder, three circularly arranged marking mechanisms are inserted at the lower end of the rotating cylinder, a driving mechanism is arranged between the three marking mechanisms and the fixed cylinder and the rotating cylinder, and the driving mechanism drives the three marking mechanisms to merge or separate; the marking mechanism comprises an ink storage tube slidably inserted at the lower end of the rotating cylinder, an ink outlet tube is eccentrically arranged at one end of the ink storage tube, an inner end of the ink outlet tube is rotatably connected to a marking ball, and a filling tube is inserted at one side of the ink storage tube.

[0009] Preferably, a pressing plate is slidably connected to the inner side of the ink storage tube, and one side of the pressing plate is elastically connected to one end of the inner side of the ink storage tube via a pressing spring.

[0010] Preferably, the driving mechanism includes a driving electric cylinder installed on the inner side of the fixed cylinder and three side plates fixed at one end of each ink storage tube. The telescopic end of the driving electric cylinder is fixed with a sliding rod through a cross plate, and a conical head is fixed to the lower end of the sliding rod. A rotating mechanism for driving the rotating cylinder to rotate is also provided between the sliding rod and the rotating cylinder.

[0011] Preferably, the rotating mechanism includes a sliding pin fixed on one side of the sliding rod and a fixed plate fixed on the upper end of the inner side of the rotating cylinder, a sliding groove cylinder sleeved on the outer side of the sliding rod is fixed to the lower end of the fixed plate, a vertical sliding groove and a spiral sliding groove are provided on the side of the sliding groove cylinder close to the sliding pin, the vertical sliding groove and the spiral sliding groove are smoothly connected, and the sliding pin is slidably connected to the inner sides of the vertical sliding groove and the spiral sliding groove.

[0012] Preferably, the upper ends of the three side plates are each provided with a concave groove matched with the outer side of the conical head, and one side of the three side plates is connected to a return spring sleeved on the outer side of the ink storage tube.

[0013] Preferably, two sleeve rods are fixed on the inner side of the fixed cylinder, guide rods are slidably inserted into the lower ends of the two sleeve rods, and the lower ends of the two guide rods are fixedly connected to the upper side of the horizontal plate.

[0014] Preferably, the distance between each of the marking balls and the lower end of the rotating cylinder is equal to half the thickness of the shading sheet.

[0015] Preferably, the positioning mechanism includes a positioning motor installed on the inner side of the positioning shell and three circumferentially arranged positioning vertical rods slidably inserted on the side of the positioning shell. Three circumferentially arranged rotating rods are fixed to the driving end of the positioning motor, and one end of the three rotating rods are rotatably connected to the upper ends of the three positioning vertical rods through connecting rods.

[0016] Preferably, positioning needle rollers are rotatably inserted into the lower ends of the three positioning vertical rods, and the lower end of each positioning needle roller is flush with the lower end of the rotating cylinder.

[0017] Preferably, a feeding mechanism is provided at one end of the upper side of the table, and the feeding mechanism includes a storage barrel and a pushing electric cylinder arranged on the upper side of the table, and the distance between the lower end of the storage barrel and the table is 1.5 times the thickness of the shading film, and the telescopic end of the pushing electric cylinder is fixed with a pushing plate that can extend between the lower end of the storage barrel and the table, and one end of the push plate is provided with a V-shaped groove.

[0018] The present invention provides an automatic screen printing device for chamfering marking of a shading sheet through improvement, which has the following improvements and advantages compared with the prior art:

[0019] First, the present invention first positions the shading sheet through a positioning mechanism, and then drives the three marking mechanisms to separate synchronously through a driving mechanism, so that the marking ball in each marking mechanism fits on the chamfered surface of the inner hole of the shading sheet, and generates a marking point on the chamfered surface of the inner hole of the shading sheet, so that a mark can be made on the chamfer of the inner hole of the shading sheet, thereby facilitating a simple and quick distinction between the front and back sides of the shading sheet, and preventing the shading sheet from being installed upside down when the lens is assembled.

[0020] Secondly: The present invention can drive the rotating mechanism in the driving mechanism to drive the three marking mechanisms to separate synchronously and then drive the rotating cylinder to rotate a certain angle. The rotating cylinder drives the three marking mechanisms at the lower end to rotate synchronously, so that the three marking mechanisms can slide along the chamfered surface of the inner hole of the shading plate. The marking ball in each marking mechanism rolls along the chamfered inner hole of the shading plate, thereby drawing the marking points into marking lines, which improves the visibility of the marking and enables workers to better distinguish the front and back sides of the shading plate during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the marking state of the shading sheet in the present invention;

[0024] Figure 3 It is a schematic diagram of the first structure inside the fixed cylinder and the rotating cylinder in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the positioning mechanism in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the marking mechanism in the present invention;

[0027] Figure 6 It is a structural schematic diagram of the marking state when the shading sheet in the present invention is placed in the forward direction;

[0028] Figure 7 It is a structural schematic diagram of the marking state when the shading sheet in the present invention is placed in reverse;

[0029] Figure 8 It is a second structural schematic diagram of the interior of the fixed cylinder and the rotating cylinder in the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the chamfer marking line of the inner hole of the light shielding plate in the present invention;

[0031] Fig.10 It is a structural schematic diagram of the feeding mechanism in the present invention pushing the shading sheet.

[0032] Reference numerals:

[0033] 1. Table; 2. Bracket; 3. Lifting electric cylinder; 4. Positioning shell; 101. Fixed cylinder; 102. Rotating cylinder; 103. Driving electric cylinder; 104. Horizontal plate; 105. Sliding rod; 106. Sliding pin; 107. Fixed plate; 108. Sliding groove cylinder; 109. Vertical sliding groove; 110. Spiral sliding groove; 111. Conical head; 112. Side plate; 113. Return spring; 114. Sleeve rod; 115 , guide rod; 116, concave groove; 201, ink storage tube; 202, ink outlet tube; 203, marking ball; 204, extrusion plate; 205, extrusion spring; 206, filling tube; 301, positioning motor; 302, rotating rod; 303, connecting rod; 304, positioning vertical rod; 305, positioning needle roller; 401, storage barrel; 402, pushing electric cylinder; 403, pushing plate; 404, V-shaped groove. DETAILED DESCRIPTION

[0034] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0035] The present invention provides an automatic screen printing device for chamfering marking of a shading sheet through improvement. The technical solution of the present invention is:

[0036] like Figures 1 to 10 As shown, an embodiment of the present invention provides an automatic silk-screen printing device for chamfering marking of a shading sheet, comprising a table 1 and a bracket 2, a lifting electric cylinder 3 is installed on the upper side of the bracket 2, a positioning shell 4 is fixed to the telescopic end of the lifting electric cylinder 3, and further comprising: a positioning mechanism arranged on the positioning shell 4 for positioning the shading sheet; a fixed cylinder 101 is fixed to the lower end of the positioning shell 4, a rotating cylinder 102 is rotatably connected to the lower end of the fixed cylinder 101, three marking mechanisms arranged in a circle are inserted at the lower end of the rotating cylinder 102, a driving mechanism is arranged between the three marking mechanisms and the fixed cylinder 101 and the rotating cylinder 102, the driving mechanism drives the three marking mechanisms to merge or separate (the three marking mechanisms are synchronously retracted toward the inner side of the rotating cylinder 102 or synchronously extended toward the outer side of the rotating cylinder 102); the marking mechanism comprises an ink storage tube 201 slidably inserted at the lower end of the rotating cylinder 102, an ink outlet tube 202 is eccentrically arranged at one end of the ink storage tube 201 (such as Figure 5 As shown in the figure, a marking ball 203 is rotatably connected to one end of the inner side of the ink outlet tube 202, and a filling tube 206 is inserted into one side of the ink storage tube 201.

[0037] Furthermore, a pressing plate 204 is slidably connected to the inner side of the ink storage tube 201, and one side of the pressing plate 204 is elastically connected to one end of the inner side of the ink storage tube 201 through a pressing spring 205;

[0038] By applying a certain thrust to the extrusion plate 204 through the extrusion spring 205, the extrusion plate 204 can apply a certain pressure to the ink inside the ink storage tube 201, so that the ink can always be squeezed on the outside of the marking ball 203, making the ink on the outside of the marking ball 203 more evenly distributed, thereby ensuring the clarity of the marking line and improving the marking effect.

[0039] Furthermore, the driving mechanism includes a driving electric cylinder 103 installed on the inner side of the fixed cylinder 101 and three side plates 112 fixed on one end of each ink storage tube 201. The telescopic end of the driving electric cylinder 103 is fixed with a slide rod 105 through a horizontal plate 104. A conical head 111 is fixed to the lower end of the slide rod 105. A rotating mechanism for driving the rotating cylinder 102 to rotate is also provided between the slide rod 105 and the rotating cylinder 102. Two sleeve rods 114 are fixed on the inner side of the fixed cylinder 101. Guide rods 115 are slidably inserted at the lower ends of the two sleeve rods 114. The lower ends of the two guide rods 115 are fixedly connected to the upper side of the horizontal plate 104.

[0040] The driving mechanism drives the three marking mechanisms to separate synchronously, so that the marking ball 203 in each marking mechanism fits onto the chamfered surface of the inner hole of the shading plate, and a marking point is generated on the chamfered surface of the inner hole of the shading plate, so that a mark can be made on the chamfer of the inner hole of the shading plate, thereby facilitating a simple and quick distinction between the front and back sides of the shading plate, and preventing the shading plate from being installed upside down when the lens is assembled.

[0041] Furthermore, the rotating mechanism includes a sliding pin 106 fixed to one side of the sliding rod 105 and a fixed plate 107 fixed to the upper end of the inner side of the rotating cylinder 102. A slide groove cylinder 108 sleeved on the outer side of the sliding rod 105 is fixed to the lower end of the fixed plate 107. A vertical slide groove 109 and a spiral slide groove 110 are provided on the side of the slide groove cylinder 108 close to the sliding pin 106. The vertical slide groove 109 and the spiral slide groove 110 are smoothly connected. The sliding pin 106 is slidably connected to the inner sides of the vertical slide groove 109 and the spiral slide groove 110.

[0042] The sliding pin 106 of the rotating mechanism is driven downward by the sliding rod 105 in the driving mechanism, and the sliding pin 106 of the rotating mechanism slides from the inner side of the vertical sliding groove 109 into the inner side of the spiral sliding groove 110. Through the sliding cooperation between the sliding pin 106 and the spiral sliding groove 110, as the sliding rod 105 moves downward, the sliding groove cylinder 108 can be driven to rotate a certain angle. The sliding groove cylinder 108 drives the rotating cylinder 102 to rotate a certain angle through the fixed plate 107. The rotating cylinder 102 drives the three marking mechanisms at the lower end to rotate synchronously, so that the three marking mechanisms can slide along the chamfered surface of the inner hole of the shading plate, and the marking ball 203 in each marking mechanism rolls along the chamfered inner hole of the shading plate, thereby drawing the marking point into a marking line, thereby improving the visibility of the mark.

[0043] Furthermore, the upper ends of the three side plates 112 are provided with concave grooves 116 adapted to the outer side of the conical head 111, and one side of the three side plates 112 is connected to a return spring 113 sleeved on the outer side of the ink storage tube 201;

[0044] The concave groove 116 can make the upper end of the side plate 112 fully fit with the conical surface of the conical head 111 (combined with Figure 5 and Figure 8), ensuring that the three side plates 112 are synchronously merged or separated (synchronously move toward the axis of the rotating cylinder 102 and synchronously move toward the side wall of the rotating cylinder 102), thereby ensuring that the three marking mechanisms are synchronously merged or separated (the three marking mechanisms are synchronously retracted toward the inside of the rotating cylinder 102 and synchronously extended toward the outside of the rotating cylinder 102), so that the marking ball 203 in each marking mechanism can fit with the chamfered surface of the inner hole of the shading plate, and through the reset spring 113, after the conical head 111 moves up and resets, a reverse force can be applied to the three side plates 112, and the three side plates 112 respectively drive the three marking mechanisms to retract toward the inside of the rotating cylinder 102 at the same time, thereby merging the three marking mechanisms.

[0045] Furthermore, the distance between each marking ball 203 and the lower end of the rotating cylinder 102 is equal to one-half of the thickness of the light shielding sheet;

[0046] When marking the shading sheet, no matter whether the chamfer of the shading sheet is facing upward or downward, the marking ball 203 in the marking mechanism can be at a similar height as the chamfer of the inner hole of the shading sheet, so that the marking ball 203 can always be in contact with the chamfered surface of the inner hole of the shading sheet, so that the marking line can be marked on the chamfered surface of the inner hole of the shading sheet. During assembly, the staff can see the marking line by facing the chamfered surface, but not the marking line on the chamfered surface, so that the front and back sides of the shading sheet can be quickly determined.

[0047] Furthermore, the positioning mechanism includes a positioning motor 301 installed on the inner side of the positioning shell 4 and three circumferentially arranged positioning vertical rods 304 slidably inserted on the side of the positioning shell 4, and the driving end of the positioning motor 301 is fixed with three circumferentially arranged rotating rods 302, one end of the three rotating rods 302 is rotatably connected to the upper ends of the three positioning vertical rods 304 through connecting rods 303, and the lower ends of the three positioning vertical rods 304 are rotatably inserted with positioning needle rollers 305, and the lower end of each positioning needle roller 305 is flush with the lower end of the rotating cylinder 102;

[0048] The three positioning needle rollers 305 in the positioning mechanism can be separated or merged synchronously. When separated, the three positioning needle rollers 305 can be pressed against the inner side of the inner hole of the shading sheet, so that the shading sheet can be positioned and fixed, and the shading sheet can be made concentric with the positioning shell 4, the fixed cylinder 101, and the rotating cylinder 102, thereby facilitating marking of the chamfer of the shading sheet and improving the accuracy of the marking position.

[0049] Furthermore, a feeding mechanism is provided at one end of the upper side of the table 1, and the feeding mechanism includes a storage barrel 401 and a pushing electric cylinder 402 provided on the upper side of the table 1, the distance between the lower end of the storage barrel 401 and the table 1 is 1.5 times the thickness of the shading sheet, and a pushing plate 403 that can extend between the lower end of the storage barrel 401 and the table 1 is fixed to the telescopic end of the pushing electric cylinder 402, and a V-shaped groove 404 is provided at one end of the pushing plate 403;

[0050] When the telescopic end of the pushing electric cylinder 402 is extended, it drives the pushing plate 403 to move toward the lower end of the storage barrel 401. The V-shaped groove 404 at one end of the pushing plate 403 can push the lowest light-shielding sheet to move to the lower position of the positioning shell 4. When the lowest light-shielding sheet is completely pushed out, the telescopic end of the pushing electric cylinder 402 drives the pushing plate 403 to move in the opposite direction and reset. When the pushing plate 403 is completely reset, the light-shielding sheet of the second layer on the lower side of the storage barrel 401 will fall on the upper side of the table 1.

[0051] Working principle: The shading sheets to be marked are stacked on the inner side of the storage barrel 401. The shading sheet at the bottom layer falls on the upper side of the table 1 under the action of gravity. During each processing, the telescopic end of the push cylinder 402 of the feeding mechanism is extended once and then retracted. When the telescopic end of the push cylinder 402 is extended, it drives the push plate 403 to move toward the lower end of the storage barrel 401. Since the distance between the lower end of the storage barrel 401 and the table 1 is 1.5 times the thickness of the shading sheet, the V-shaped groove 40 at one end of the push plate 403 4 can push the light shielding sheet of the lowest layer to move to the lower position of the positioning shell 4, while the upper half of the light shielding sheet of the second layer on the lower side is blocked by the storage barrel 401 and cannot be pushed. When the light shielding sheet of the lowest layer is completely pushed out, the light shielding sheet of the second layer on the lower side falls on the upper side of the push plate 403 under the action of gravity, and the telescopic end of the push cylinder 402 drives the push plate 403 to move in the opposite direction and reset. When the push plate 403 is completely reset, the light shielding sheet of the second layer on the lower side of the storage barrel 401 will slide from the upper side of the push plate 403 to the upper side of the table 1;

[0052] After the shading sheet is pushed to the bottom of the positioning shell 4, the telescopic end of the lifting electric cylinder 3 is controlled to extend to drive the positioning shell 4, the fixed cylinder 101 and the rotating cylinder 102 to move vertically downward, so that the lower end of the rotating cylinder 102 contacts the upper side of the table 1, and at the same time, the rotating cylinder 102 and the three positioning vertical rods 304 of the positioning mechanism are located inside the circular hole in the middle of the shading sheet. First, the driving end of the positioning motor 301 of the positioning mechanism is controlled to rotate a certain angle, thereby driving the three rotating rods 302 to rotate, and the three rotating rods 302 drive the three connecting rods 303 to rotate. The three positioning vertical rods 304 are telescopically moved, so that the three positioning vertical rods 304 are synchronously extended to the outside of the positioning shell 4, so that the three positioning vertical rods 304 can be separated from each other, and the three positioning vertical rods 304 respectively drive the three positioning needle rollers 305 to separate, and the three positioning needle rollers 305 are pressed against the inner side of the inner hole of the light shielding sheet, so that the light shielding sheet can be positioned and fixed, and the light shielding sheet is concentric with the positioning shell 4, the fixed cylinder 101, and the rotating cylinder 102, so as to facilitate marking the chamfer of the light shielding sheet and improve the accuracy of the marking position;

[0053] The marking ink can be added to the inner side of the ink storage tube 201 through the filling tube 206 of each marking mechanism, and the marking ink will flow to the inner side of the ink outlet tube 202 and adhere to the outer side of the marking ball 203;

[0054] After the shading sheet is positioned, the telescopic end of the driving electric cylinder 103 of the control driving mechanism extends out to drive the cross plate 104 and the sliding rod 105 to move vertically downward. At this time, the sliding pin 106 located on the outside of the sliding rod 105 slides along the inner side of the vertical sliding groove 109, so that the sliding rod 105 does not rotate when it moves downward, and the sliding rod 105 drives the conical head 111 to move downward. Through the sliding cooperation between the conical head 111 and the three concave grooves 116, the conical head 111 can apply a thrust to the three side plates 112 pointing to the outside of the rotating cylinder 102 when it moves downward. Under the action of the thrust, the three side plates 112 and the three marking mechanisms can be pushed to extend synchronously to the outside of the rotating cylinder 102. Moreover, since the distance between each marking ball 203 and the lower end of the rotating cylinder 102 is equal to half the thickness of the shading sheet, each marking mechanism The marking ball 203 is always at the same level as the chamfer of the shading sheet. When marking the shading sheet, no matter whether the chamfer of the shading sheet is facing upward or downward, the marking ball 203 in the marking mechanism and the chamfer of the inner hole of the shading sheet can be at a similar height, so that the marking ball 203 can always contact the chamfered surface of the inner hole of the shading sheet. When the three marking mechanisms extend outward, the three marking balls 203 in the three marking mechanisms can contact the chamfer of the inner hole of the shading sheet, so that the ink adhered to the outer side of the marking ball 203 is transferred to the chamfered surface of the inner hole of the shading sheet, and a marking point is generated on the chamfered surface of the inner hole of the shading sheet, so that a mark can be made on the chamfer of the inner hole of the shading sheet, so as to facilitate the simple and quick distinction between the front and back sides of the shading sheet, and prevent the shading sheet from being installed upside down when the lens is assembled;

[0055] As the telescopic end of the driving electric cylinder 103 drives the slide bar 105 to continue to move downward, the slide bar 105 drives the conical head 111 to continue to move downward. At this time, the concave grooves 116 at the upper ends of the three side plates 112 are separated from the conical surface of the conical head 111 and contact the cylindrical surface of the conical head 111. At this time, the three side plates 112 will not be subjected to the force directed to the outside of the rotating cylinder 102, so the three marking mechanisms will not continue to extend outward, and at this time, the sliding pin 106 of the rotating mechanism slides from the inside of the vertical sliding groove 109 into the inside of the spiral sliding groove 110, and the sliding pin 106 and the spiral sliding groove are connected. The sliding cooperation between 110 can drive the slide groove cylinder 108 to rotate a certain angle as the slide rod 105 moves downward. The slide groove cylinder 108 drives the rotating cylinder 102 to rotate a certain angle through the fixed plate 107. The rotating cylinder 102 drives the three marking mechanisms at the lower end to rotate synchronously. Therefore, the three marking mechanisms can slide along the chamfered surface of the inner hole of the shading plate. The marking ball 203 in each marking mechanism rolls along the chamfered inner hole of the shading plate, thereby drawing the marking point into a marking line, which improves the visibility of the mark and enables workers to better distinguish the front and back sides of the shading plate during assembly.

[0056] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic screen printing device for chamfering marking of a light shielding sheet, comprising a table (1) and a bracket (2), wherein a lifting electric cylinder (3) is installed on the upper side of the bracket (2), and a positioning shell (4) is fixed to the telescopic end of the lifting electric cylinder (3), characterized in that: Also includes: A positioning mechanism provided on the positioning shell (4) and used for positioning the light shielding sheet; A fixed cylinder (101) is fixed to the lower end of the positioning shell (4); the lower end of the fixed cylinder (101) is rotatably connected to a rotating cylinder (102); three marking mechanisms arranged in a circle are inserted into the lower end of the rotating cylinder (102); a driving mechanism is provided between the three marking mechanisms and the fixed cylinder (101) and the rotating cylinder (102); the driving mechanism drives the three marking mechanisms to merge or separate; The marking mechanism comprises an ink storage tube (201) slidably inserted at the lower end of the rotating cylinder (102); an ink outlet tube (202) is eccentrically arranged at one end of the ink storage tube (201); a marking ball (203) is rotatably connected to one end of the inner side of the ink outlet tube (202); and a filling tube (206) is inserted at one side of the ink storage tube (201); The inner side of the ink storage tube (201) is slidably connected to a pressing plate (204), and one side of the pressing plate (204) is elastically connected to one end of the inner side of the ink storage tube (201) via a pressing spring (205); The driving mechanism comprises a driving electric cylinder (103) mounted inside a fixed cylinder (101) and three side plates (112) fixed to one end of each ink storage tube (201); a sliding rod (105) is fixed to the telescopic end of the driving electric cylinder (103) via a transverse plate (104); a conical head (111) is fixed to the lower end of the sliding rod (105); and a rotating mechanism for driving the rotating cylinder (102) to rotate is also provided between the sliding rod (105) and the rotating cylinder (102); The rotating mechanism comprises a sliding pin (106) fixed to one side of the sliding rod (105) and a fixed plate (107) fixed to the upper end of the inner side of the rotating cylinder (102); a sliding groove cylinder (108) sleeved on the outer side of the sliding rod (105) is fixed to the lower end of the fixed plate (107); a vertical sliding groove (109) and a spiral sliding groove (110) are provided on the side of the sliding groove cylinder (108) close to the sliding pin (106); the vertical sliding groove (109) and the spiral sliding groove (110) are smoothly connected; and the sliding pin (106) is slidably connected to the inner sides of the vertical sliding groove (109) and the spiral sliding groove (110); The upper ends of the three side plates (112) are each provided with a concave groove (116) adapted to the outer side of the conical head (111), and one side of the three side plates (112) is connected to a return spring (113) sleeved on the outer side of the ink storage tube (201); Two sleeve rods (114) are fixed inside the fixed cylinder (101), guide rods (115) are slidably inserted into the lower ends of the two sleeve rods (114), and the lower ends of the two guide rods (115) are fixedly connected to the upper side of the horizontal plate (104).

2. The automatic screen printing device for chamfering marking of a light shielding sheet according to claim 1, characterized in that: The distance between each marking rolling ball (203) and the lower end of the rotating cylinder (102) is equal to half the thickness of the light shielding sheet.

3. The automatic screen printing device for chamfering marking of a light shielding sheet according to claim 1, characterized in that: The positioning mechanism comprises a positioning motor (301) mounted on the inner side of the positioning shell (4) and three circumferentially arranged positioning vertical rods (304) slidably inserted on the side of the positioning shell (4); three circumferentially arranged rotating rods (302) are fixed to the driving end of the positioning motor (301); one end of each of the three rotating rods (302) is rotatably connected to the upper ends of the three positioning vertical rods (304) via connecting rods (303).

4. The automatic screen printing device for chamfering marking of a light shielding sheet according to claim 3, characterized in that: A positioning roller (305) is rotatably inserted into the lower ends of the three positioning vertical rods (304), and the lower end of each positioning roller (305) is flush with the lower end of the rotating cylinder (102).

5. The automatic screen printing device for chamfering marking of a light shielding sheet according to claim 1, characterized in that: A feeding mechanism is provided at one end of the upper side of the table (1), the feeding mechanism comprising a material storage barrel (401) and a material pushing electric cylinder (402) provided on the upper side of the table (1), the distance between the lower end of the material storage barrel (401) and the table (1) being 1.5 times the thickness of the light shielding sheet, a pushing plate (403) that can extend between the lower end of the material storage barrel (401) and the table (1) being fixed at the telescopic end of the material pushing electric cylinder (402), and one end of the pushing plate (403) being provided with a V-shaped groove (404).

Images