Printing apparatus

Abstract

The utility model discloses a printing device, which belongs to the technical field of printing equipment and comprises a frame, a multi-axis linkage mechanism, a camera mechanism, a clamping mechanism, a steel mesh supporting mechanism, a scraper mechanism, a wiping mechanism and a solder paste supplementing mechanism. The multi-axis linkage mechanism is installed on the rack, the camera mechanism is arranged on the rack in a sliding mode, the clamping mechanism is installed on the multi-axis linkage mechanism, the steel mesh supporting mechanism is installed on the rack and located above the multi-axis linkage mechanism, and the scraper mechanism is installed on the rack in a sliding mode. The scraper mechanism comprises a scraper body; the scraper body is rotationally installed to adjust the included angle between the scraper body and the steel mesh body, the wiping mechanism is slidably installed on the rack, and the solder paste supplementing mechanism is slidably installed on the rack. The printing device can improve the printing quality and the printing efficiency of the steel mesh body.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a printing device. Background Art

[0002] In stencil printing technology, the complete process of solder paste printing can be summarized as follows: installing the corresponding stencil body according to the product (PCB board), adjusting the width of the CV group according to the product size, cleaning the stencil body, adding solder paste material to the stencil body and stirring it evenly, clamping the product with a clamping mechanism, identifying the mark points with a camera body, precise alignment adjustment of the multi-axis linkage mechanism, and completing the printing by sliding a scraper across the stencil body.

[0003] The scraper body of the solder paste printer currently on the market does not match the angle of the stencil body, resulting in poor printing quality and low printing efficiency of the stencil body. Utility Model Content

[0004] The purpose of the embodiment of the present utility model is to provide a printing device that can improve the printing quality and printing efficiency of the steel mesh body.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A printing device, comprising:

[0007] frame;

[0008] A multi-axis linkage mechanism is installed on the frame;

[0009] a camera mechanism, slidably mounted on the frame;

[0010] a clamping mechanism, mounted on the multi-axis linkage mechanism and used to clamp the substrate on the multi-axis linkage mechanism;

[0011] A steel mesh support mechanism is installed on the frame and located above the multi-axis linkage mechanism;

[0012] A scraper mechanism is slidably mounted on the frame; the scraper mechanism includes a scraper body; the scraper body is rotatably mounted to adjust the angle between the scraper body and the steel mesh body;

[0013] A wiping mechanism, used for wiping the steel mesh body on the steel mesh supporting mechanism; the wiping mechanism is slidably mounted on the frame;

[0014] as well as

[0015] A solder paste replenishing mechanism is used to add solder paste to the steel mesh body on the steel mesh supporting mechanism; the solder paste replenishing mechanism is slidably mounted on the frame.

[0016] Optionally, the scraper mechanism also includes a first slide mounted on the frame in a sliding manner, a first slide seat mounted on the first slide in an up and down sliding manner, a knife seat mounted on the first slide in a rotatable manner, and a first elastic member connecting the first slide and the knife seat; the scraper body is rotatably mounted on the knife seat and is located above the steel mesh support mechanism, the rotation axis of the knife seat is parallel to the sliding direction of the first slide, the rotation axis of the knife seat is perpendicular to the rotation axis of the scraper body, and there are several scraper bodies that are arranged in sequence along the rotation axis of the knife seat.

[0017] Optionally, the solder paste replenishing mechanism includes a second slide seat slidably mounted on the first slide, a switching seat slidably mounted on the second slide, a cylinder mounted on the switching seat, and an extrusion seat connected to the output of the cylinder; the second slide is provided with a plurality of loading positions for placing solder paste cans, and the loading positions are located on the moving path of the extrusion seat.

[0018] Optionally, the multi-axis linkage mechanism includes an X-axis moving component, a Y-axis moving component mounted on the X-axis moving component, a Z-axis rotation component rotatably mounted on the Y-axis moving component, a first Z-axis moving component mounted on the Z-axis rotation component, a second Z-axis moving component mounted on the first Z-axis moving component, and a workbench mounted on the second Z-axis moving component; the workbench is located on the moving path of the clamping mechanism.

[0019] Optionally, the clamping mechanism includes a second slide and a third slide that can be relatively slidably mounted on the first Z-axis moving assembly, a first clamping seat provided on the second slide, a first pressure seat slidably mounted on the first clamping seat, a second clamping seat provided on the third slide, and a second pressure seat slidably mounted on the second clamping seat; the second slide and the third slide are arranged at intervals, and the workbench is located between the second slide and the third slide.

[0020] Optionally, the camera mechanism includes a fourth slide mounted on the frame in a sliding manner, and a coaxial camera body mounted on the fourth slide.

[0021] Optionally, the wiping mechanism includes a fifth slide mounted on a frame in a sliding manner, a spray pipe, a paper placer, a lifting wiping absorber, and a paper reel arranged in sequence on the fifth slide; the fourth slide is detachably connected to the fifth slide.

[0022] Optionally, the steel mesh support mechanism includes a first support beam slidably mounted on the frame and a second support beam slidably mounted on the frame; an accommodating space for accommodating the steel mesh body is formed between the first support beam and the second support beam.

[0023] Optionally, the printing device further comprises a conveying mechanism having a conveying channel for conveying the substrate; the conveying channel is located above the multi-axis linkage mechanism.

[0024] Optionally, the printing device also includes a loading mechanism having a loading channel for conveying the substrate and a unloading mechanism having a unloading channel for conveying the substrate; the loading channel, the conveying channel, and the loading channel are connected in sequence, and the steel mesh support mechanism, the conveying channel, and the multi-axis linkage mechanism are arranged in sequence from top to bottom.

[0025] The beneficial effects of the utility model are as follows: the scraper body of the scraper mechanism of the printing device is rotatably installed. During printing, the scraper body can rotate relative to the steel mesh body, thereby adjusting the angle between the scraper body and the steel mesh body, so that the angle of the scraper body and the steel mesh body matches, thereby improving the printing quality and printing efficiency of the steel mesh body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 It is a structural schematic diagram of a printing device;

[0028] Figure 2 An exploded view of the printing device;

[0029] Figure 3 It is a structural diagram of the frame, camera mechanism, scraper mechanism, wiping mechanism, and solder paste replenishing mechanism;

[0030] Figure 4 It is a structural diagram of the multi-axis linkage mechanism, clamping mechanism, conveying mechanism, loading mechanism, and unloading mechanism;

[0031] Figure 5 It is a structural diagram of the conveying mechanism, loading mechanism and unloading mechanism;

[0032] Figure 6 It is a structural diagram of a multi-axis linkage mechanism;

[0033] Figure 7 It is a structural diagram of the scraper mechanism and solder paste replenishing mechanism;

[0034] Figure 8 Schematic diagram of the wiping mechanism.

[0035] Description of the accompanying drawings:

[0036] 11. Frame; 12. Multi-axis linkage mechanism; 13. Camera mechanism; 14. Clamping mechanism; 15. Stencil support mechanism; 16. Scraper mechanism; 17. Wiping mechanism; 18. Solder paste replenishing mechanism; 19. Conveying mechanism; 20. Loading mechanism; 21. Unloading mechanism; 22. Stencil body; 23. Base plate; 24. First guide rail; 25. Second guide rail; 26. Third guide rail; 27. Fourth guide rail; 28. First screw module;

[0037] 121. X-axis moving assembly; 122. Y-axis moving assembly; 123. Z-axis rotation assembly; 124. First Z-axis moving assembly; 125. Second Z-axis moving assembly; 126. Workbench;

[0038] 1211, first slide plate; 1212, first driver;

[0039] 1221, second skateboard;

[0040] 1231, turntable; 1232, third driver; 1233, second elastic member;

[0041] 1241, first lifting platform; 1242, first guide rod; 1243, first driving rod; 1244, first transmission belt;

[0042] 1251, second lifting platform; 1252, second guide rod; 1253, second driving rod; 1244, second transmission belt;

[0043] 131. Fourth slide; 132. Coaxial camera body; 133. Connecting hole; 134. Fifth screw module;

[0044] 141. Second slide; 142. Third slide; 143. First clamping seat; 144. Second clamping seat; 145. First pressing seat; 146. Second pressing seat;

[0045] 151. First support beam; 152. Second support beam;

[0046] 161. Scraper body; 162. First carriage; 163. First slide seat; 164. Scraper seat; 165. Screw body; 166. First rotating shaft;

[0047] 171. Fifth carriage; 172. Paper placer; 173. Lifting and wiping absorber; 174. Paper reel; 175. First lifter; 176. Cleaning paper;

[0048] 1731, second lifter; 1732, top plate; 1733, card slot; 1734, adsorption channel;

[0049] 181. Second slide; 182. Switching seat; 183. Cylinder; 184. Extrusion seat; 185. Solder paste tank;

[0050] 191. First reference frame; 192. First adjustment frame; 193. First transmission wheel assembly;

[0051] 201, second reference frame; 202, second screw module; 203, second adjustment frame; 204, second transmission wheel assembly;

[0052] 211. Third reference frame; 212. Third screw rod module; 213. Third adjustment frame; 214. Third transmission wheel assembly. DETAILED DESCRIPTION

[0053] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0054] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "fixed," "connected," "communicated," "abutted," "clamped," etc. should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0055] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0056] In the description herein, it should be understood that terms such as "upper," "lower," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0057] Throughout this specification, references to terms such as "one embodiment" and "example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example.

[0058] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0059] Unless specifically stated or defined otherwise, the term “and / or” used in the present invention includes any and all combinations of one or more of the associated listed items.

[0060] For the convenience of description, unless otherwise specified, the following terms "upper and lower" and "lower" are Figure 1 The up and down directions are consistent with the left and right directions mentioned below. Figure 1 The left and right directions of the device are consistent, and the front and back mentioned below are consistent with Figure 1 The projection direction itself is consistent.

[0061] The stencil cleaning device of the present application is used to clean solder paste from the stencil itself. The stencil itself (also known as the SMT stencil) is a special SMT mold. Its main function is to facilitate the deposition of solder paste, with the goal of transferring the correct amount of solder paste to the correct position on the blank PCB board.

[0062] like Figures 1 to 8 As shown, this embodiment provides a printing device, including a frame 11, a multi-axis linkage mechanism 12, a camera mechanism 13, a clamping mechanism 14, a steel mesh supporting mechanism 15, a scraper mechanism 16, a wiping mechanism 17, and a solder paste replenishing mechanism 18.

[0063] The multi-axis linkage mechanism 12 is mounted on the frame 11. The multi-axis linkage mechanism 12 is used to drive the substrate 23 (PCB board) to move. The multi-axis linkage mechanism 12 can drive the substrate 23 to move in one or more combinations of horizontal movement, vertical movement, rotation along a vertical axis, and other modes of movement. In this embodiment, the multi-axis linkage mechanism 12 can drive the substrate 23 to move along two mutually perpendicular horizontal directions, along a vertical direction, and along a vertical axis. The steel mesh support mechanism 15 is mounted on the frame 11 and is located above the multi-axis linkage mechanism 12. The steel mesh support mechanism 15 is used to place and support the steel mesh body 22 so that the steel mesh body 22 is located above the substrate 23 and aligned with the substrate 23. The camera mechanism 13 is slidably mounted on the frame 11. The camera mechanism 13 can identify the steel mesh body 22 on the steel mesh support mechanism 15 and the substrate 23 below the steel mesh body 22. The clamping mechanism 14 is installed on the multi-axis linkage mechanism 12 and is used to clamp the substrate 23 on the multi-axis linkage mechanism 12. When there is a substrate 23 on the multi-axis linkage mechanism 12, the substrate 23 is fixed by the clamping mechanism 14, so that the solder paste on the steel mesh body 22 is transferred to the accurate position on the empty PCB board.

[0064] The scraper mechanism 16 is slidably mounted on the frame 11. The scraper mechanism 16 includes a scraper body 161. The solder paste replenishing mechanism 18 is used to add solder paste to the steel mesh body 22 on the steel mesh support mechanism 15. The solder paste replenishing mechanism 18 is slidably mounted on the frame 11. The scraper body 161 can scrape the upper surface of the steel mesh body 22 so that the solder paste will be drawn across at a uniform speed and fill the holes on the printing steel mesh body 22, thereby ensuring the subsequent printing quality. The scraper body 161 is rotatably mounted to adjust the angle between the scraper body 161 and the steel mesh body 22. Different angles between the scraper body 161 and the steel mesh body 22 will produce different printing effects. The angle between the scraper body 161 of the present application and the upper surface of the steel mesh body 22 is adjustable. The printing device can adjust the printing device according to the quality requirements of the printing to avoid poor printing quality due to the mismatch of the angle between the scraper body 161 and the steel mesh body 22.

[0065] After printing on the stencil body 22, the wiping mechanism 17 removes any residual solder paste from the stencil body 22. The wiping mechanism 17 is used to wipe the stencil body 22 on the stencil support mechanism 15. The wiping mechanism 17 is slidably mounted on the frame 11. After printing on the stencil body 22, the wiping mechanism 17 wipes any residual solder paste from the stencil body 22, separating the solder paste from the stencil body 22. The wiping mechanism 17 wipes the lower surface of the stencil body 22, thereby cleaning the stencil body 22.

[0066] Key References Figure 1 、 Figure 3 、 Figure 7The scraper mechanism 16 also includes a first slide 162 slidably mounted on the frame 11, a first slide 163 slidably mounted on the first slide 162, a knife seat 164 rotatably mounted on the first slide 163, and a first elastic member connecting the first slide 163 and the knife seat 164. The first elastic member is a torsion spring. The knife seat 164 is rotatably mounted on the first slide 163 via the first rotating shaft 166. The first elastic member is sleeved on the first rotating shaft 166 and connects the first slide 163 and the knife seat 164. The frame 11 is provided with a fourth guide rail 27 and a fourth slider slidably mounted on the fourth guide rail 27. The fourth guide rail 27 extends along a horizontal straight direction. The first slide 162 is provided on the fourth slider. The first slide 163 is located above the steel mesh support mechanism 15. The scraper body 161 is rotatably mounted on the knife seat 164 via the screw body 165 and is located above the steel mesh support mechanism 15. The rotation axis of the knife seat 164 is parallel to the sliding direction of the first slide 162 and both extend horizontally. The rotation axis of the knife seat 164 and the rotation axis of the scraper body 161 are both horizontally arranged and perpendicular to the rotation axis of the knife seat 164 and the rotation axis of the scraper body 161. There are a plurality of scraper bodies 161 and they are arranged in sequence along the rotation axis of the knife seat 164.

[0067] The scraper mechanism 16 features both adjustable angles and adaptability. The adjustable angle refers to the adjustable angle between the scraper body 161 and the upper surface of the stencil body 22. The scraper body 161 is rotated by driving the screw body 165. Adaptability refers to the fact that when the scraper body 161 contacts the upper surface of the stencil body 22, the first elastic member and the first rotating shaft 166 cooperate to compensate for any uneven or incomplete contact between the scraper body 161 and the upper surface of the stencil body 22, enhancing practicality.

[0068] Optionally, the solder paste replenishing mechanism 18 is installed on the scraper mechanism 16, and the scraper mechanism 16 can drive the solder paste replenishing mechanism 18 to move together. The solder paste replenishing mechanism 18 moves along the sliding path of the scraper mechanism 16 without additional drive. At the same time, the solder paste replenishing mechanism 18 can also slide in a direction perpendicular to the sliding path of the scraper mechanism 16 to achieve sliding in two directions, making the structure of the solder paste replenishing mechanism 18 simpler and occupying less space in the printing device.

[0069] The solder paste replenishing mechanism 18 comprises a second slide 181 slidably mounted on the first slide 162, a switching base 182 slidably mounted on the second slide 181, a cylinder 183 mounted on the switching base 182, and an extrusion base 184 connected to the output of the cylinder 183. The second slide 181 is provided with multiple loading positions for placing solder paste cans 185, located within the travel path of the extrusion base 184. A third guide rail 26 is provided on the first slide 162. The third and fourth guide rails 26 and 27 extend horizontally and perpendicularly to each other. The second slide 181 is slidably mounted on the third guide rail 26. The switching seat 182 is slidably installed on the second slide 181 through the seventh screw module. The sliding direction of the switching seat 182 is parallel to the sliding direction of the second slide 181. Multiple loading positions are arranged at intervals below the cylinder 183 along the sliding direction of the switching seat 182. The extrusion seat 184 on the output end of the cylinder 183 extends vertically downward to squeeze the solder paste in the solder paste tank 185 directly below onto the steel mesh body 22. When the solder paste in the solder paste tank 185 is used up, the switching seat 182 drives the cylinder 183 to slide above another solder paste tank 185, and then the solder paste can be quickly continued to be transported to the steel mesh body 22. There is no need to frequently replace the solder paste tank 185, thereby improving printing efficiency. The solder paste replenishing mechanism 18 has the functions of automatically monitoring the solder paste residue on the steel mesh body 22 and automatically adding solder paste. The second slide 181 is provided with at least one additional solder paste tank 185 as a backup. In large-scale printing production, the solder paste can be replenished in time according to the situation, the number of times the solder paste is replaced can be reduced, and the standby time due to the suspension of work due to the filling of the solder paste in the solder paste tank 185 can be reduced, thereby increasing the sustainable working time, and the printing device has more advantages in production.

[0070] Key References Figure 1 、 Figure 4 、 Figure 6In one embodiment, the multi-axis linkage mechanism 12 includes an X-axis moving assembly 121, a Y-axis moving assembly 122 mounted on the X-axis moving assembly 121, a Z-axis rotation assembly 123 rotatably mounted on the Y-axis moving assembly 122, a first Z-axis moving assembly 124 mounted on the Z-axis rotation assembly 123, a second Z-axis moving assembly 125 mounted on the first Z-axis moving assembly 124, and a workbench 126 mounted on the second Z-axis moving assembly 125. The workbench 126 is located on the moving path of the clamping mechanism 14. The workbench 126 is detachably mounted on the second Z-axis moving assembly 125, and can be replaced with workbench 126 of different types and sizes depending on the type and size of the substrate 23. Both the X-axis moving assembly 121 and the Y-axis moving assembly 122 can achieve horizontal linear motion of the substrate 23. The direction in which the X-axis moving assembly 121 moves the substrate 23 is perpendicular to the direction in which the Y-axis moving assembly 122 moves the substrate 23. The Z-axis rotating assembly 123 can drive the substrate 23 to rotate along a vertical axis. The first Z-axis moving assembly 124 and the second Z-axis moving assembly 125 can both realize the movement of the substrate 23 in the vertical direction, wherein the clamping mechanism 14 is installed in the first Z-axis moving assembly 124, and the first Z-axis moving assembly 124 can simultaneously drive the clamping mechanism 14 and the workbench 126 to move in the vertical direction, and the second Z-axis moving assembly 125 can drive the workbench 126 to move relative to the clamping mechanism 14 in the vertical direction. In this way, the second Z-axis moving assembly 125 can drive the workbench 126 to move to the clamping mechanism 14 according to the type of substrate 23, so that the clamping mechanism 14 can accurately clamp different substrates 23, and then the first Z-axis moving assembly 124 drives the clamping mechanism 14, the workbench 126, and the substrate 23 on the workbench 126 to move together, so that the clamping mechanism 14 and the substrate 23 are all in contact with the lower surface of the steel mesh body 22, avoiding uneven printing or missing content caused by incomplete fitting of the substrate 23 and the lower surface of the steel mesh body 22.

[0071] Optionally, the X-axis moving assembly 121 includes a fifth guide rail disposed on the frame 11, a first slide 1211 slidably mounted on the fifth guide rail, and a first driver 1212 in transmission connection with the first slide 1211. The Y-axis moving assembly 122 includes a sixth guide rail disposed on the first slide 1211, a second slide 1221 slidably mounted on the sixth guide rail, and a second driver in transmission connection with the second slide 1221. Both the X-axis moving assembly 121 and the Y-axis moving assembly 122 utilize linear guides, servo motors, and linear grating dual feedback, enabling precise control of the X-axis moving assembly 121 and the Y-axis moving assembly 122 to drive the movement of the substrate 23.

[0072] The Z-axis rotation assembly 123 includes a turntable 1231 rotatably mounted on the second slide 1221, a third driver 1232 mounted on the second slide 1221, and a second elastic member 1233 connected to the output of the third driver 1232. The second elastic member 1233 is connected to the turntable 1231. The second elastic member 1233 is a spring that, through a spring connection, converts the linear motion of the third driver 1232 into rotation about the Z-axis. The X-axis movement assembly 121, the Y-axis movement assembly 122, and the Z-axis rotation assembly 123 combine to adjust the product's position within a two-dimensional plane, allowing for subsequent alignment compensation.

[0073] Furthermore, a seventh guide rail is provided on the second slide plate 1221 , a seventh slider is provided on the seventh guide rail, and the output end of the third driver 1232 is transmission-connected to the second elastic member 1233 via the seventh slider.

[0074] The first Z-axis movement assembly 124 includes a first guide rod 1242 slidably mounted on the second slide 1221, a first drive rod 1243 threadedly connected to the second slide 1221, a first lifting platform 1241 mounted on the first drive rod 1243, a first transmission belt 1244, and a fourth actuator. Multiple first guide rods 1242 and first drive rods 1243 are provided and spaced apart. The first transmission belt 1244 is sleeved around multiple first drive rods 1243. The fourth actuator is in transmission connection with any first drive rod 1243, rotating the first drive rod 1243 through the fourth actuator, thereby causing the first lift platform 1241 to move up and down relative to the second slide 1221. Similarly, the second Z-axis movement assembly 125 includes a second guide rod 1252 slidably mounted on the first lifting platform 1241, a second drive rod 1253 threadedly connected to the second lifting platform 1251, the second lifting platform 1251 mounted on the second drive rod 1253, a second transmission belt 1244, and a fifth actuator. The fifth actuator drives the second lifting platform 1251 to move up and down relative to the first lifting platform 1241. The workbench 126 is mounted on the first lifting platform 1241.

[0075] In this way, the second lifting platform 1251 and the workbench 126 of the present application lift the substrate 23 to the highest point of the clamping position of the clamping mechanism 14, and the first lifting platform 1241 lifts the substrate 23 to the height of the printing position and makes slight adjustments to assist the coaxial camera body 132 of the camera mechanism 13 to complete visual focus, realizing the main functions of loading and lifting the substrate 23, identifying and positioning, and compensating for the camera working distance. After two lifts, the upper surface of the clamping mechanism 14 and the printing surface of the substrate 23 are in full contact with the lower surface of the steel mesh body 22, eliminating the gap between the printing surface of the substrate 23 and the steel mesh body 22, ensuring the integrity of the printed content and good printing quality.

[0076] The fourth and fifth drivers use servo motors and are combined with linear gratings to form a dual feedback form of closed-loop control, ensuring the motion accuracy and repeat positioning accuracy in the Z direction, and reducing the risk of the first Z-axis moving component 124 and the second Z-axis moving component 125 falling as a whole due to sudden power failure.

[0077] In one embodiment, the clamping mechanism 14 includes a second slide 141 and a third slide 142 slidably mounted on the first Z-axis moving assembly 124, a first clamping seat 143 disposed on the second slide 141, a first pressing seat 145 slidably mounted on the first clamping seat 143, a second clamping seat 144 disposed on the third slide 142, and a second pressing seat 146 slidably mounted on the second clamping seat 144. The second slide 141 and the third slide 142 are spaced apart, and the workbench 126 is located between the second slide 141 and the third slide 142. Specifically, a first screw module 28 is provided on the first lifting platform 1241, a second slide 141 is fixedly mounted relative to the first lifting platform 1241, and a third slide 142 is slidably mounted on the first lifting platform 1241. The third slide 142 can move closer to or farther from the second slide 141, thereby causing the first clamping seat 143 and the second clamping seat 144 to move closer to or farther from each other. When the first clamping seat 143 and the second clamping seat 144 move closer to each other, they can clamp the substrate 23 to achieve positioning. The first pressure seat 145 and the second pressure seat 146 can slide relative to the first clamping seat 143 and the second clamping seat 144, respectively, and extend between the first clamping seat 143 and the second clamping seat 144 to achieve squeezing and positioning of the substrate 23. The first pressure seat 145 and the second pressure seat 146 press down the substrate 23 to prevent product warping and deformation caused by excessive or insufficient clamping force of the first clamping seat 143 and the second clamping seat 144. The first clamping seat 143 and the second clamping seat 144 stably clamp and secure the substrate 23, and cooperate with the camera mechanism 13 to capture the upper and lower points, ensuring accurate alignment compensation between the substrate 23 and the stencil body 22. In addition, the first pressure seat 145 and the second pressure seat 146 prevent the second Z-axis moving assembly 125 from lifting the substrate 23 too much and exceeding the upper surface of the first clamping seat 143 and the second clamping seat 144, effectively preventing the substrate 23 from warping or deformation.

[0078] Furthermore, the clamping mechanism 14 also includes a rangefinder. This rangefinder can monitor the deformation of the substrate 23 in real time and actively adjust the clamping force of the first clamping seat 143 and the second clamping seat 144 to prevent the substrate 23 from warping and excessive deformation. The clamping mechanism 14 provides a reference surface and identification holes for initial positioning and identification, making identification and positioning more convenient. The clamping mechanism 14 can also have a vacuum adsorption function to ensure that the upper surface of the clamping mechanism 14 and the lower surface of the steel mesh body 22 are completely in contact with each other, avoiding any gaps between them.

[0079] Key References Figures 1 to 3Furthermore, the camera mechanism 13 includes a fourth slide 131 slidably mounted on the frame 11 and a coaxial camera body 132 mounted on the fourth slide 131. Specifically, the frame 11 is provided with a fourth screw module, which is in driving connection with the fourth slide 131. The coaxial camera body 132 is a camera having two optical paths distributed vertically, and the coaxial camera body 132 can simultaneously identify two mark points (identification points).

[0080] Existing cameras have difficulty compensating for misaligned upper and lower point recognition errors, and precision compensation for products of varying specifications is particularly challenging. The coaxial camera body 132 identifies the upper and lower points of the stencil body 22 and the clamping mechanism 14, providing feedback to the multi-axis linkage mechanism 12 for adjustment, thereby aligning the printed portion of the substrate 23 with the printed portion of the stencil body 22. The coaxial camera body 132 also eliminates the assembly errors caused by the misalignment of the two cameras when capturing the upper and lower recognition points. This improves compensation accuracy, ensures printing quality, and reduces printing errors.

[0081] Key References Figure 1 、 Figure 8 The wiping mechanism 17 includes a fifth slide 171 slidably mounted on the frame 11, a spray pipe, a paper dispenser 172, a lifting and wiping absorber 173, and a paper reel 174, all of which are sequentially arranged on the fifth slide 171. The spray pipe can spray detergent, the paper dispenser 172 can release cleaning paper 176, and the paper reel 174 can engrave and wind used cleaning paper 176. The lifting and wiping absorber 173 can lift the cleaning paper 176 released by the paper dispenser 172 so that the cleaning paper 176 can wipe the steel mesh body 22. In addition, the suction channel 1734 of the lifting and wiping absorber 173 is connected to an external vacuum pump to generate negative pressure, which absorbs the residual solder paste on the steel mesh body 22 onto the cleaning paper 176. The cleaning paper 176 prevents the solder paste from entering the suction channel 1734 or the vacuum pump pipeline. The fourth slide 131 and the fifth slide 171 are detachably connected. When the fourth slide 131 is connected to the fifth slide 171, the camera mechanism 13 can drive the wiping mechanism 17 to move together. When the fourth slide 131 is separated from the fifth slide 171, the camera mechanism 13 and the wiping mechanism 17 can move independently, thereby simplifying the structure of the printing device.

[0082] Optionally, the lifting and wiping absorber 173 includes a second lifter 1731 mounted on the fifth carriage 171, a top plate 1732 connected to the output end of the second lifter 1731, and a top bar disposed in a slot 1733 on the top plate 1732. An adsorption channel 1734 is provided on the top plate 1732.

[0083] Optionally, a fifth screw module 134 is provided on the fourth slide 131, and the coaxial camera body 132 is transmission-connected to the fifth screw module 134. The movement direction of the output end of the fourth screw module is perpendicular to the movement direction of the output end of the fifth screw module 134, so that the coaxial camera body 132 can slide horizontally forward, backward, left, and right.

[0084] Furthermore, a connecting hole 133 is provided on the fourth slide 131, and a first lifter 175 is provided on the fifth slide 171. The connecting hole 133 is located on the moving path of the output end of the first lifter 175. The output end of the first lifter 175 is inserted into the connecting hole 133 when it is extended, and leaves the connecting hole 133 when the output end of the first lifter 175 is retracted. By extending and retracting the output end of the first lifter 175, the camera mechanism 13 and the wiping mechanism 17 are connected together or separated, which can reduce the error caused by the camera mechanism 13 itself.

[0085] The frame 11 is provided with a first guide rail 24. The second slide 141 of the camera mechanism 13 and the fifth slide 171 of the wiping mechanism 17 are both slidably mounted on the first guide rail 24, simplifying the structure of the camera mechanism 13 and the wiping mechanism 17 and reducing their space requirements. The camera mechanism 13 and the wiping mechanism 17 share a common set of linear guides. When cleaning is required, the camera mechanism 13 and the wiping mechanism 17 are locked together and moved. When cleaning is not required, the wiping mechanism 17 is moved to a side edge of the frame 11, simplifying the design and reducing space requirements. A spray tube sprays a specific cleaning agent onto the cleaning paper roll, and a vacuum-assisted lift-up wiper absorber 173 wipes and absorbs solder paste residue, ensuring smooth removal. A sensor integrated into the wiping mechanism 17 counts the number of cleaning paper rolls, ensuring sufficient paper remaining and prompt replacement when insufficient. In other embodiments, the cleaning paper roll can be replaced with other cleaning methods to meet the cleaning needs of different working conditions.

[0086] Key References Figures 1 to 3In one embodiment, the steel mesh support mechanism 15 includes a first support beam 151 slidably mounted on the frame 11 and a second support beam 152 slidably mounted on the frame 11. The first support beam 151 has a first support portion, and the second support beam 152 has a second support portion. The first support beam 151 and the second support beam 152 are both mounted on the frame 11 through the second guide rail 25. A storage space for accommodating the steel mesh body 22 is formed between the first support beam 151 and the second support beam 152. The first support portion and the second support portion are located in the storage space, and the two ends of the steel mesh body 22 abut against the first support portion and the second support portion, respectively. Specifically, two sixth screw modules are provided on the frame 11, and the two sixth screw modules are respectively connected to the first support beam 151 and the second support beam 152 in a transmission manner, so that the first support beam 151 and the second support beam 152 are close to or far away from each other, thereby meeting the support positioning of steel mesh bodies 22 of different sizes and different printing contents. In addition, a height adjustment mechanism can be provided on the first support beam 151 and the second support beam 152 , and the height adjustment mechanism can adjust the installation height of the steel mesh body 22 to assist the camera mechanism 13 in completing focus recognition.

[0087] Key References Figures 4 and 5 In one embodiment, the printing device further includes a conveying mechanism 19 having a conveying channel for conveying the substrate 23. The conveying channel is located above the multi-axis linkage mechanism 12. The conveying mechanism 19 can deliver the substrate 23 to the top of the multi-axis linkage mechanism 12.

[0088] Furthermore, the printing device also includes a loading mechanism 20 having a loading channel for conveying substrates 23 and a unloading mechanism 21 having a unloading channel for conveying substrates 23. The loading channel, conveying channel, and loading channel are connected in sequence, and the steel mesh support mechanism 15, conveying channel, and multi-axis linkage mechanism 12 are arranged in sequence from top to bottom. The loading mechanism 20 can deliver the printed substrate 23 to the conveying mechanism 19. After the substrate 23 is printed, it is sent from the conveying mechanism 19 to the unloading mechanism 21, and finally unloaded by the unloading mechanism 21. The loading mechanism 20, conveying mechanism 19, and unloading mechanism 21 form a complete transportation mechanism, which is responsible for the transportation link of the substrate 23 in the entire printing process.

[0089] Furthermore, the conveying mechanism 19 includes a first reference frame 191 mounted on the second carriage 141, a first adjustment frame 192 mounted on the third carriage 142, and a first transmission wheel assembly 193. Both the first reference frame 191 and the first adjustment frame 192 are equipped with a first transmission wheel assembly 193, which includes a first synchronous wheel, a first synchronous belt, a first tensioning pulley, and other components. A conveying channel is formed on two spaced-apart first synchronous belts. As the third carriage 142 drives the first adjustment frame 192 toward or away from the first reference frame 191, the distance between the two spaced-apart first synchronous belts changes, thereby adjusting the size of the conveying channel to accommodate different substrates 23.

[0090] The feeding mechanism 20 includes a second screw module 202 disposed on the frame 11, a second reference frame 201 mounted on the frame 11, a second adjustment frame 203 mounted on the second screw module 202, and a second transmission wheel assembly 204. Both the second reference frame 201 and the second adjustment frame 203 are mounted with a second transmission wheel assembly 204. The second transmission wheel assembly 204 includes a second synchronous wheel, a second synchronous belt, a second tensioning wheel, and other components. The feeding channel is formed on two spaced-apart second synchronous belts. The second screw module 202 drives the second adjustment frame 203 toward or away from the second reference frame 201, changing the distance between the two spaced-apart second synchronous belts. This allows the size of the feeding channel to be adjusted to accommodate different substrates 23.

[0091] Similarly, the unloading mechanism 21 includes a third screw module 212 disposed on the frame 11, a third reference frame 211 mounted on the frame 11, a third adjustment frame 213 mounted on the third screw module 212, and a third transmission wheel assembly 214. Both the third reference frame 211 and the third adjustment frame 213 are mounted with a third transmission wheel assembly 214. The third transmission wheel assembly 214 includes a third synchronous wheel, a third synchronous belt, a third tensioning pulley, and other components. The unloading channel is formed on two spaced-apart third synchronous belts. The third screw module 212 drives the third adjustment frame 213 toward or away from the third reference frame 211, changing the distance between the two spaced-apart third synchronous belts. This allows the size of the unloading channel to be adjusted to accommodate different substrates 23.

[0092] The printing device of the present application can adjust the front-end transportation and the rear-end transportation according to different needs and different working conditions to meet the transportation, clamping, identification and printing of various substrates 23. The following uses a 350×350 sized PCB board as an example to illustrate the working process of the printing device.

[0093] The printing device, following the established process flow, has pre-assembled a stencil body 22 of the corresponding specifications onto the stencil support mechanism 15 and cleaned it. The widths of the loading mechanism 20, conveyor mechanism 19, and unloading mechanism 21 are adjusted to accommodate a 350×350 substrate 23, and the corresponding worktable 126 is installed on the multi-axis linkage mechanism 12. The solder paste replenishing mechanism 18 then adds an appropriate amount of solder paste to the stencil body 22 and stirs it evenly. When the previous substrate 23 completes printing and leaves the conveyor mechanism 19 and enters the unloading mechanism 21, the next substrate 23 is transported from the loading mechanism 20 to the conveyor mechanism 19. During this process, the camera mechanism 13 provides feedback on the position stop.

[0094] When the substrate 23 stops at the conveying mechanism 19, the first pressure seat 145 and the second pressure seat 146 of the clamping mechanism 14 extend, and the multi-axis linkage mechanism 12 cooperates with the workbench 126 to lift the substrate 23 upward, so that the substrate 23 is separated from the conveying mechanism 19 until the substrate 23 is lifted to the first pressure seat 145 and the second pressure seat 146. The clamping mechanism 14 then clamps and fixes the substrate 23, completing the rough positioning of the substrate 23. The camera mechanism 13 then sequentially identifies the identification holes on the clamping mechanism 14, the mark points on the substrate 23, and the mark points on the steel mesh body 22, and feeds the image results back to the control system, thereby controlling the multi-axis linkage mechanism 12 to perform micro-step position adjustments, completing the two steps of upper and lower point identification and acquisition and precise alignment. In addition, the rangefinder can monitor the deformation of the substrate 23 in real time throughout the clamping process, actively adjust the clamping force, and reduce the effects of poor printing quality and printing defects caused by deformation of the substrate 23.

[0095] After alignment is complete, the camera mechanism 13 retreats to its standby position. The first Z-axis motion assembly 124 lifts the entire clamping mechanism 14 to the printing height, offsetting the working height of the camera mechanism 13. The clamping mechanism 14 then uses vacuum suction to securely hold the stencil body 22 in place. At this point, the upper surface of the clamping mechanism 14, the printing surface of the substrate 23, and the lower surface of the stencil body 22 are all in full contact, allowing the printing process to proceed.

[0096] After the scraper body 161 of the scraper mechanism 16 descends steadily, the scraper mechanism 16 as a whole moves at a uniform speed along the linear guide rail, and the solder paste will be drawn at a uniform speed and fill the holes on the steel mesh body 22. Then the scraper mechanism 16 moves back at a uniform speed along the linear guide rail to fill the steel mesh holes again to ensure that the printed content is saturated and there is no loss, thus completing the printing cycle.

[0097] After the printing process is completed, the first Z-axis moving assembly 124 and the second Z-axis moving assembly 125 descend, the first clamping seat 143 and the second clamping seat 144 release the substrate 23, and the first pressing seat 145 and the second pressing seat 146 retract, and the printed substrate 23 is placed back on the conveying mechanism 19. The printed substrate 23 is then transported to the unloading mechanism 21 and enters the next process. At the same time, the substrate 23 in the loading mechanism 20 is transported to the conveying mechanism 19, and the above printing process is repeated.

[0098] When several printings are completed and the printing steel mesh needs to be cleaned, the camera mechanism 13 will move to the wiping mechanism 17 and be connected and fixed thereto. The wiping mechanism 17 will start vacuum adsorption and follow the camera mechanism 13 to move back and forth once along the linear guide rail. At this time, the cleaning paper roll sprayed with detergent by the spray pipe will be tightly attached to the lower surface of the printing steel mesh body 22, and the solder paste residue in and near the holes of the steel mesh body 22 can be removed.

[0099] The printing device of the present application integrates the functions of transport docking, positioning of the steel mesh body 22, precise alignment and lifting of the substrate 23, identification and positioning, clamping and fixing, scraper printing, solder paste replenishment and replacement, and subsequent cleaning. It can complete different printing tasks according to different products, meet the necessary process flow of solder paste printing, and at the same time have the functions of subsequent material replenishment, pollution cleaning, machine docking, etc., which enhances the overall practicality and applicability of the printing device. The transport docking adopts a three-stage transport mechanism design of a loading mechanism 20, a conveying mechanism 19, and a unloading mechanism 21, so that the structures actually involved in the printing process are fewer, the space occupied is smaller, and the counterweight is lighter, further reducing the range of error control, improving the alignment accuracy, and not affecting the structural docking of the previous and next processes.

[0100] The multi-axis linkage mechanism 12 utilizes an innovative design that combines a first Z-axis moving assembly 124 with a second Z-axis moving assembly 125. This design eliminates the gap between the printing surface of substrate 23 and the lower surface of the stencil, and simultaneously lifts substrate 23 to the printing position. This simultaneously achieves both loading and lifting, and compensating for the camera's working distance. This ensures uniform printing and excellent results, reduces the difficulty of compensation in high-volume printing production, and meets necessary process flow requirements. The combination of the multi-axis linkage mechanism 12 and the camera mechanism 13 eliminates assembly errors caused by the misalignment of the two cameras' upper and lower axes, improving alignment and compensation accuracy.

[0101] When the printing device is printing, the fixed steel mesh body 22 is used as a reference, and the overall orientation of the multi-axis linkage mechanism 12 is adjusted and the substrate 23 is lifted through the feedback of the camera mechanism 13. That is, in a single printing, the stationary steel mesh body 22 is used as a reference, and the printing errors can be compensated and corrected by adjusting the multi-axis linkage mechanism 12, thereby reducing the error accumulation caused by different references and improving the compensation accuracy in large-scale printing production.

[0102] The camera mechanism 13 and the wiping mechanism 17 share a set of guide rails. When cleaning is required, the camera mechanism 13 and the wiping mechanism 17 are connected and move together. When cleaning is not required, the wiping mechanism 17 is fixed in a standby position, which does not affect the printing process, simplifies the mechanical design, and optimizes the spatial layout. The stencil support mechanism 15, loading mechanism 20, conveying mechanism 19, and unloading mechanism 21 can be adjusted to accommodate products of different sizes and materials, meeting the actual needs of various working conditions, reducing machine replacements in large-scale printing production, and lowering production costs.

[0103] The scraper mechanism 16 has angle adjustment function and adaptability. It can adjust the angle between the scraper body 161 and the steel mesh body 22 according to different printing materials and printing quality to achieve the most ideal printing effect. It can also automatically eliminate the problem of uneven contact between the scraper body 161 and the surface of the steel mesh body 22 to ensure uniform printing and printing quality of the solder paste.

[0104] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A printing device, characterized in that include: Rack (11); A multi-axis linkage mechanism (12) is mounted on the frame (11); A camera mechanism (13) is slidably mounted on the frame (11); a clamping mechanism (14), mounted on the multi-axis linkage mechanism (12) and used for clamping a substrate (23) on the multi-axis linkage mechanism (12); A steel mesh support mechanism (15) is installed on the frame (11) and is located above the multi-axis linkage mechanism (12); A scraper mechanism (16) is slidably mounted on the frame (11); the scraper mechanism (16) comprises a scraper body (161); the scraper body (161) is rotatably mounted to adjust the angle between the scraper body (161) and the steel mesh body (22); A wiping mechanism (17) is used for wiping the steel mesh body (22) on the steel mesh supporting mechanism (15); the wiping mechanism (17) is slidably mounted on the frame (11); as well as A solder paste replenishing mechanism (18) is used to add solder paste to the steel mesh body (22) on the steel mesh supporting mechanism (15); the solder paste replenishing mechanism (18) is slidably mounted on the frame (11).

2. The printing device according to claim 1, wherein The scraper mechanism (16) also includes a first slide (162) slidably mounted on the frame (11), a first slide (163) slidably mounted on the first slide (162) up and down, a knife seat (164) rotatably mounted on the first slide (163), and a first elastic member connecting the first slide (163) and the knife seat (164); the scraper body (161) is rotatably mounted on the knife seat (164) and is located above the steel mesh support mechanism (15), the rotation axis of the knife seat (164) is parallel to the sliding direction of the first slide (162), the rotation axis of the knife seat (164) is perpendicular to the rotation axis of the scraper body (161), and there are several scraper bodies (161) and they are arranged in sequence along the rotation axis of the knife seat (164).

3. The printing device according to claim 2, wherein: The solder paste replenishing mechanism (18) includes a second slide (181) slidably mounted on the first slide (162), a switching seat (182) slidably mounted on the second slide (181), a cylinder (183) mounted on the switching seat (182), and an extrusion seat (184) connected to the output of the cylinder (183); the second slide (181) is provided with a plurality of loading positions for placing solder paste cans (185), and the loading positions are located on the moving path of the extrusion seat (184).

4. The printing device according to any one of claims 1 to 3, characterized in that: The multi-axis linkage mechanism (12) includes an X-axis moving component (121), a Y-axis moving component (122) mounted on the X-axis moving component (121), a Z-axis rotating component (123) rotatably mounted on the Y-axis moving component (122), a first Z-axis moving component (124) mounted on the Z-axis rotating component (123), a second Z-axis moving component (125) mounted on the first Z-axis moving component (124), and a workbench (126) mounted on the second Z-axis moving component (125); the workbench (126) is located on the moving path of the clamping mechanism (14).

5. The printing device according to claim 4, characterized in that The clamping mechanism (14) includes a second slide (141) and a third slide (142) which can be relatively slidably mounted on the first Z-axis moving component (124), a first clamping seat (143) provided on the second slide (141), a first pressure seat (145) slidably mounted on the first clamping seat (143), a second clamping seat (144) provided on the third slide (142), and a second pressure seat (146) slidably mounted on the second clamping seat (144); the second slide (141) and the third slide (142) are arranged at intervals, and the workbench (126) is located between the second slide (141) and the third slide (142).

6. The printing device according to any one of claims 1 to 3, characterized in that: The camera mechanism (13) comprises a fourth slide (131) slidably mounted on the frame (11) and a coaxial camera body (132) mounted on the fourth slide (131).

7. The printing device according to claim 6, characterized in that The wiping mechanism (17) comprises a fifth slide (171) slidably mounted on the frame (11), a spray pipe, a paper dispenser (172), a lifting and wiping absorber (173), and a paper reel (174) which are sequentially arranged on the fifth slide (171); the fourth slide (131) is detachably connected to the fifth slide (171).

8. The printing device according to any one of claims 1 to 3, characterized in that: The steel mesh support mechanism (15) comprises a first support beam (151) slidably mounted on the frame (11) and a second support beam (152) slidably mounted on the frame (11); an accommodating space for accommodating the steel mesh body (22) is formed between the first support beam (151) and the second support beam (152).

9. The printing device according to any one of claims 1 to 3, characterized in that: It also includes a conveying mechanism (19) having a conveying channel for conveying the substrate (23); the conveying channel is located above the multi-axis linkage mechanism (12).

10. The printing device according to claim 9, wherein It also includes a loading mechanism (20) having a loading channel for conveying a substrate (23) and a unloading mechanism (21) having a unloading channel for conveying a substrate (23); the loading channel, the conveying channel, and the loading channel are connected in sequence, and the steel mesh support mechanism (15), the conveying channel, and the multi-axis linkage mechanism (12) are arranged in sequence from top to bottom.

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