A watch lens shading inkjet device

Abstract

This invention discloses a light-shielding inkjet device for watch lenses. Key technical features include a product conveyor line, and further comprising: a feeding mechanism, a dot-jet mechanism, an ink-wiping mechanism, a pre-curing mechanism, and a discharging mechanism. The dot-jet mechanism is movably equipped with an inkjet head, which is controlled by a piezoelectric jet valve for ink ejection. The feeding mechanism, dot-jet mechanism, and pre-curing mechanism are arranged sequentially, and the product conveyor line extends from the feeding mechanism to the pre-curing mechanism. This invention, through the coordination of multiple mechanisms and the continuous connection of the product conveyor line, achieves fully automated operation of the entire process for watch lenses, from raw material feeding, precise inkjet printing, inkjet head cleaning, ink pre-curing, to finished product discharging. Furthermore, the inkjet head is controlled by a piezoelectric jet valve, effectively improving the product yield.

Description

Technical Field

[0001] This invention relates to the field of lens light-blocking technology, and more specifically to a light-blocking inkjet device for watch lenses. Background Technology

[0002] In watch lens manufacturing, specific areas need to be light-shielded to meet the optical requirements of the watch's internal display module and overall design specifications. Previously, this was achieved using light-shielding adhesive in conjunction with dispensing. Now, to reduce adhesive thickness, black ink is sprayed for light shielding. However, currently, there is no fully automated equipment on the market capable of handling the entire inkjet process for watch lens light shielding, resulting in low production efficiency. Furthermore, because the ink is relatively thin, traditional equipment produces a sparse ink that is prone to scattering, leading to a low yield rate. Therefore, we have developed a fully automated inkjet printing system to solve these problems, enabling the entire light-shielding process for watch lenses. Summary of the Invention

[0003] The purpose of this invention is to design a fully automatic inkjet device to achieve full automation of the inkjet light-blocking process for watch lenses. To achieve the above objective, this invention provides the following technical solution:

[0004] A watch lens light-shielding inkjet printing device includes a product conveyor line and further comprises: a loading mechanism that sequentially transports products from a tray to the product conveyor line and unloads empty trays; the product conveyor line transports the products to a dot-jet printing mechanism; a dot-jet printing mechanism having a movable inkjet head controlled by a piezoelectric jet valve to spray ink onto the light-shielding surface of the product; the inkjet head being movable to a wiping mechanism; a wiping mechanism having a movable cloth roll that wipes the inkjet head by moving the cloth, and also having a spray nozzle for spraying cleaning liquid onto the cloth roll; a pre-curing mechanism having a platform module and a heating module; the heating module pre-curing the product by heating, while the platform module drives the product to rotate; and an unloading mechanism that transports the pre-cured products to an empty tray and unloads full trays; the loading mechanism, dot-jet printing mechanism, and pre-curing mechanism are arranged sequentially, and the product conveyor line extends from the loading mechanism to the pre-curing mechanism.

[0005] The present invention is further configured such that: the feeding mechanism includes a feeding machine platform, the feeding machine platform is provided with a receiving conveyor line, a product handling module, an intermediate transfer platform, and an empty tray handling module; the tray enters the feeding machine platform from the receiving conveyor line, the product handling module sequentially picks up the products in the tray and places them onto the intermediate transfer platform, the intermediate transfer platform conveys the products toward the product conveyor line, the product conveyor line picks up the products from the intermediate transfer platform and sends them to the dot spraying mechanism, and the empty tray handling module picks up the empty tray from the receiving conveyor line.

[0006] The invention is further configured such that: the loading machine platform is equipped with an empty tray buffer module and an empty tray lifting assembly; the empty tray buffer module includes an empty tray conveyor line, the length of which is at least greater than the length of two trays; the empty tray lifting assembly includes a lifting guide rail arranged vertically, and two support frames for placing trays are slidably connected to the lifting guide rail; the support frames extend above the empty tray conveyor line, and the two support frames are respectively located on both sides of the empty tray conveyor line; the empty tray handling module grabs empty trays from the receiving conveyor line and stacks them onto the support frames; after a stack is full, the support frames descend to place the trays on the empty tray conveyor line; the empty tray conveyor line can drive the trays to move.

[0007] The present invention is further configured such that an ion wind component is provided on the conveying path of the intermediate transfer platform, the ion wind component being used to eliminate static electricity from the product.

[0008] The present invention is further configured such that: the dot-jet printing mechanism includes a dot-jet printing machine platform; a Y-axis slide rail is arranged horizontally on the dot-jet printing machine platform; a product placement platform is slidably connected to the Y-axis slide rail; an X-axis slide rail is arranged horizontally on the dot-jet printing machine platform and above the Y-axis slide rail, perpendicular to the Y-axis slide rail; a vertically arranged Z-axis slide rail is slidably connected to the X-axis slide rail; an inkjet head is slidably connected to the Z-axis slide rail; an R-axis platform is rotatably connected to the product placement platform; the rotation axis of the R-axis platform is parallel to the Y-axis slide rail; a U-axis platform for placing products is rotatably connected to the R-axis platform; the rotation axis of the U-axis platform is perpendicular to the Y-axis slide rail; the U-axis platform includes a detachably connected fixture; a CCD camera module is also arranged on the dot-jet printing machine platform and above the Y-axis slide rail; and a backlight plate that cooperates with the CCD camera module is arranged on the R-axis platform.

[0009] The present invention is further configured such that: the ink wiping mechanism includes an ink wiping housing, on which a feeding wheel and a take-up wheel are rotatably connected; the roll of cloth is wound between the feeding wheel and the take-up wheel; the take-up wheel drives the roll of cloth to move; a flexible block is provided on the ink wiping housing; the flexible block is fitted to the other side of the point where the roll of cloth abuts against the inkjet head; the nozzle is disposed inside the flexible block; the flexible block has a spray hole on the side facing the roll of cloth; and the nozzle sprays cleaning liquid onto the roll of cloth through the spray hole.

[0010] The present invention is further configured such that: a positioning housing is provided on the ink wiping housing, the flexible block is disposed inside the positioning housing, the top of the positioning housing has an opening, the top of the flexible block has a protruding abutting part protruding from the opening, the abutting part is in contact with the rolled cloth, the positioning housing includes a detachably connected upper housing and a lower housing, the flexible block has a limiting part protruding from its periphery, and the upper housing is in contact with the upper end face of the limiting part.

[0011] The present invention is further configured such that: the pre-fixation mechanism includes a conveying guide rail, the platform module is slidably connected to the conveying guide rail, the heating module is disposed above the conveying guide rail, and the heating module includes two heating components arranged along the conveying direction of the conveying guide rail, the heating ports of the two heating components are arranged facing each other, and the heating ports of the two heating components are inclined downward.

[0012] The present invention is further configured such that: a first protective cover is provided on the platform module, the top of the first protective cover has an opening, and a second protective cover is provided on the heating module, the bottom of the second protective cover has an opening.

[0013] Compared with the prior art, the present invention has at least the following advantages: 1. Through the coordination of multiple mechanisms and the seamless connection of the product conveyor line, the entire process of watch lens production, from raw material feeding, precision inkjet printing, inkjet head cleaning, ink pre-curing to finished product unloading, is fully automated. No manual intervention is required, significantly reducing labor costs and greatly improving production efficiency. This solves the problem of low production efficiency caused by the lack of fully automated equipment in existing technologies. Furthermore, the inkjet head is controlled by a piezoelectric jet valve, which improves the spraying accuracy compared to traditional spraying methods, controls the scattering, avoids excessive ink thinning and diffusion, ensures uniform thickness of the light-blocking layer, and effectively improves the product yield.

[0014] 2. The feeding mechanism automatically completes the entire feeding process of "material tray feeding - product grabbing and transfer - product docking with subsequent workstations - empty tray recycling" by mechanical modules, completely replacing the traditional manual operation mode of transferring lenses and manually sorting empty trays, greatly reducing labor costs, and unifying the feeding rhythm with the subsequent processing rhythm, effectively improving the operating efficiency of the entire production line.

[0015] 3. The ink wiping mechanism, through the elastic support of the flexible block, creates uniform and sufficient contact pressure between the rolled cloth and the inkjet head nozzle, ensuring that the rolled cloth fits snugly and wraps around the inkjet head properly. Furthermore, through the nozzles and spray holes set in the flexible block, cleaning liquids such as alcohol can be sprayed onto the rolled cloth simultaneously, achieving a dual cleaning mode of physical wiping + chemical dissolution. Compared with wiping with a rolled cloth alone, it can quickly dissolve stubborn residual ink and greatly improve the cleaning effect.

[0016] 4. The two heating components are located on the front and rear sides of the product and tilted downwards towards the product, which can form a wrap-around hot air coverage from the front and rear sides of the product. Combined with the rotation of the product driven by the stage module, the heat can be evenly received in all areas of the lens, solving the problems of inconsistent curing effect and curing blind spots caused by traditional unidirectional heating, significantly improving the pre-curing effect and ensuring the product yield.

[0017] 5. The first protective cover of the stage module and the second protective cover of the heating module form a protective structure that works together to gather hot air, reduce heat loss, improve heating efficiency and reduce energy consumption, and isolate external dust and impurities to prevent the lens surface from being contaminated during the pre-curing process. At the same time, it can prevent hot air turbulence from affecting surrounding equipment. Attached Figure Description

[0018] Figure 1 : Overall schematic diagram of this embodiment; Figure 2 Schematic diagram of the feeding mechanism; Figure 3 Top view of the feeding mechanism; Figure 4 Schematic diagram of the material receiving conveyor line; Figure 5 Schematic diagram of product handling module, intermediate transfer platform, and product conveyor line; Figure 6 Schematic diagram of the empty disk handling module; Figure 7 : A schematic diagram of an empty disk cache module; Figure 8 : Schematic diagram of the lifting guide rail; Figure 9 : First perspective view of the dot spray mechanism; Figure 10 : A second perspective view of the dot spray mechanism; Figure 11 : Schematic diagram of the product placement platform for the dot spraying mechanism; Figure 12 : A diagram showing the backlight panel and fixture being removed; Figure 13 : Schematic diagram of the jig; Figure 14 Schematic diagram of a gantry frame; Figure 15 Front view of the ink erasing mechanism; Figure 16 : Schematic diagram of the positioning housing part; Figure 17 : A three-dimensional sectional view of the positioning housing portion; Figure 18 : Rear view of the ink erasing mechanism; Figure 19 : Schematic diagram of the pre-fixed mechanism; Figure 20 : Schematic diagram of the explosion of the second protective shield; Figure 21 : Structural diagram of the platform module; Figure 22 : Schematic diagram of the heating module; Figure 23 : Schematic diagram of the heating box body.

[0019] Explanation of reference numerals in the attached figures: 100. Feeding mechanism; 101. Feeding machine; 102. Receiving conveyor line; 103. Empty pallet handling module; 1031. First moving track; 1032. First lifting cylinder; 1033. First gripper; 104. Product handling module; 1041. Multi-axis arm; 1042. Second gripper; 1043. Vision camera; 105. Transfer platform; 1051. Second moving track; 1052. Platform; 107. Empty pallet buffer module; 1071. Empty pallet conveyor line; 1072. Lifting guide rail; 1073. Support frame; 108. Positioning plate; 109. Guide surface; 110. Baffle plate; 111. Position sensor; 112. Ionizing air assembly; 200. Dot-jet printing mechanism; 201. Dot-jet printing machine base; 202. Y-axis slide rail; 203. Product placement platform; 204. X-axis slide rail; 205. Z-axis slide rail; 206. Inkjet head; 207. R-axis platform; 208. U-axis platform; 2081. CC motor; 2082. Fixture; 2083. Vacuum nozzle; 2084. Connecting tray; 2085. Placement tray; 209. CCD camera module; 2091. Camera... 2092. Camera; 210. Light source; 211. Backlight panel; 212. Through hole; 213. First mounting slot; 214. First connecting hole; 215. Mounting post; 216. Second mounting slot; 217. Second connecting hole; 218. Drive motor; 219. Harmonic reducer; 220. Gantry frame; 221. Piezoelectric jet valve; 222. Grating ruler; 222. Linear motor; 223. Servo motor; 224. Heating lamp assembly; 300. Ink wiping mechanism; 301. Ink wiping housing; 302. Feeding roller; 303. Receiving roller; 304. Cloth roll; 305. Flexible block; 3051. Abutting part; 3052. Limiting part; 306. Nozzle; 307. Nozzle tube; 308. Directional wheel; 309. Positioning housing; 3091. Upper housing; 3092. Lower housing; 310. Cleaning section; 311. Photoelectric sensor; 312. Drive motor; 313. Synchronous belt; 314. Ink discharge cup; 315. Spacing wheel; 316. Groove photoelectric sensor; 317. Controller; 318. Tensioning wheel; 400. Pre-fixing mechanism; 401. Conveying guide rail; 402. Platform module; 4021. Platform frame; 4022. Placement platform; 4023. Vacuum nozzle; 4024. Platform motor; 403. Heating module; 4031. Heating frame; 4032. Mounting bracket; 4033. Heating assembly; 4034. Heating box; 4035. Air inlet; 4036. Air outlet; 4037. Thermocouple; 404. First protective cover; 405. Second protective cover; 406. First adjusting slide; 407. Mounting hole; 408. Second adjusting slide; 409. Mounting slot; 500. Product conveyor line; 501. Third moving track; 502. Third lifting cylinder; 503. Third gripper; 600. Unloading mechanism; 700. Lens; 800. Material tray. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] like Figure 1 As shown, a watch lens light-shielding inkjet device includes a product conveyor line 500, and further includes: a loading mechanism 100, a dot-jet mechanism 200, an ink-wiping mechanism 300, a pre-fixing mechanism 400, and a unloading mechanism 600. The loading mechanism 100 sequentially transports the products (lenses 700) in the material tray 800 to the product conveyor line 500, and unloads the empty material tray 800, conveying the products to the dot-jet mechanism 200. The dot-jet mechanism 200 is movably equipped with an inkjet head 206, which sprays ink through a piezoelectric jet valve. The inkjet head 206 sprays ink onto the light-shielding surface of the product. The inkjet head 206 can be moved to the ink-wiping mechanism 300. The ink-wiping mechanism 300 is movably equipped with a roll of ink... The cloth 304 is used to wipe the inkjet head 206 by moving the cloth 304. It is also equipped with a nozzle 307 for spraying cleaning liquid onto the cloth 304. The pre-curing mechanism 400 is equipped with a platform module 402 and a heating module 403. The heating module 403 heats and pre-cures the product, while the platform module 402 drives the product to rotate. The unloading mechanism 600 transports the pre-cured product into the empty material tray 800 and unloads the full material tray 800.

[0022] The feeding mechanism 100, the inkjet printing mechanism 200, and the pre-fixing mechanism 400 are arranged in sequence. The product conveyor line 500 extends from the feeding mechanism 100 to the pre-fixing mechanism 400. The product conveyor line 500 picks up the product from the feeding mechanism 100 and puts it into the inkjet printing mechanism 200. After the product completes inkjet printing in the inkjet printing mechanism 200, it is picked up by the product conveyor line 500 and put into the pre-fixing mechanism 400.

[0023] like Figures 2 to 8 As shown, the feeding mechanism 100 includes a feeding machine 101, which is equipped with a receiving conveyor line 102, a product handling module 104, an intermediate transfer platform 105, and an empty tray handling module 103. The product conveyor line 500 extends outside the feeding machine 101 and into the subsequent workstations. A tray full of products enters the feeding machine 101 from the receiving conveyor line 102. The product handling module 104 sequentially picks up the products from the tray and places them onto the intermediate transfer platform 105. The intermediate transfer platform 105 then transports the products towards the product conveyor line. The product conveyor line picks up products from the intermediate transfer platform 105 and delivers them to subsequent processing stations such as spraying. After all the products in a tray have been picked up, the empty tray handling module 103 picks up the empty tray from the receiving conveyor line 102. This completes a fully automated process of tray feeding, product picking and transfer, product entry into the subsequent workstation, and empty tray recycling.

[0024] Specifically, the receiving conveyor 102 is a drive structure where a motor and rollers drive a synchronous belt. The receiving conveyor 102 extends inward from the edge of the loading platform 101, and a tray filled with products is manually placed onto the synchronous belt for transport. A baffle plate 110 protrudes vertically from the end of the receiving conveyor 102, and a position sensor 111, electrically connected to the receiving conveyor 102, is located at the front end of the baffle plate 110. The position sensor 111 uses a laser sensor, which is triggered when the tray blocks the laser. When the position sensor 111 detects material, it controls the receiving conveyor 102 to stop, allowing the product handling module 104 to grasp the product from the tray. At this time, the side wall of the tray is in contact with the baffle plate 110, forming a dual positioning mechanism through physical obstruction, ensuring that the tray remains within a uniform and accurate position range each time it stops.

[0025] The product handling module 104 includes a multi-axis arm 1041. In this embodiment, a four-axis arm is used, which is a commercially available technology. The end of the arm can move to any position within a circular range and can extend and retract vertically. The ends of the receiving conveyor line 102 and the intermediate transfer table 105 are both within the range of movement of the multi-axis arm 1041. A second gripper 1042 for gripping products is provided at the end of the multi-axis arm 1041. The second gripper 1042 is a vacuum nozzle. The product handling module 104 also includes a CCD vision camera 1043 mounted on the frame above the receiving conveyor line 102. The camera 1043 is positioned so that the product in the tray can be visually positioned, thereby controlling the multi-axis arm 1041 to grip the products sequentially.

[0026] The intermediate transfer platform 105 includes a second moving track 1051, which extends from the product handling module 104 towards the product conveyor line. A platform 1052 for placing products is movably mounted on the second moving track 1051, and the second moving track 1051 can drive the platform 1052 to move along its length. After the product handling module 104 picks up the product, it is placed on the platform 1052. A vacuum nozzle is provided in the middle of the platform 1052 to fix the product in place. Processing stations can also be added along the running path of the intermediate transfer platform 105, such as ion air jetting, to remove static electricity from the product before it is loaded to the subsequent spraying station.

[0027] The product conveyor line 500 includes a third moving track 501, which extends from above the end of the intermediate transfer platform 105 beyond the loading platform 101 and to subsequent workstations such as spraying. A third lifting cylinder 502 is movably mounted on the third moving track 501, driving it to move along its length. A third gripper 503 for grasping products is mounted on the output shaft of the third lifting cylinder 502, employing a vacuum nozzle. When the platform 1052 moves below the third gripper, the vacuum nozzle of the platform 1052 releases, the third gripper descends to contact the product, and the vacuum nozzle opens to grasp it.

[0028] The empty tray handling module 103 includes a first moving track 1031, which extends from above the receiving conveyor line 102 to above the empty tray handling module 103. A first lifting cylinder 1032 is movably mounted on the first moving track 1031, driving the first lifting cylinder 1032 to move along its length. A first gripper 1033 for gripping the tray is mounted on the output shaft of the first lifting cylinder 1032. The first gripper 1033 includes an adjustable mounting frame with four vacuum nozzles. The four vacuum nozzles grip the four corners of the tray securely. Furthermore, by adjusting the distance between the two crossbars of the mounting frame and adjusting the position of the vacuum nozzles on the crossbars, the size of the rectangle formed by the four vacuum nozzles can be adjusted to accommodate trays of different sizes.

[0029] In this embodiment, the first moving track 1031, the second moving track 1051, and the third moving track can be driven by rodless cylinders or motors in conjunction with lead screws, or other existing drive methods.

[0030] The loading platform 101 is also equipped with an empty tray buffer module, which includes an empty tray conveyor line 1071. The empty tray conveyor line 1071 is arranged in a direction perpendicular to the receiving conveyor line 102, and its length is at least greater than the length of two trays, so that multiple trays can be arranged simultaneously. The empty tray handling module 103 picks up empty trays from the receiving conveyor line 102 and stacks them onto the empty tray conveyor line 1071. When the stack reaches a preset height, it forms a complete stack. At this time, the empty tray conveyor line 1071 moves the trays forward one station, and the operator can then remove the entire stack of empty trays.

[0031] The empty tray buffer module also includes an empty tray lifting assembly, which includes a lifting guide rail 1072 vertically positioned at the beginning of the empty tray conveyor line 1071. Two support frames 1073 for placing trays are slidably connected to the lifting guide rail 1072. The two support frames 1073 move synchronously and can be driven by a motor screw, cylinder, or other existing methods. The support frames 1073 extend above the empty tray conveyor line 1071, and the two support frames 1073 are located on opposite sides of the empty tray conveyor line 1071. This ensures that when the support frames 1073 are filled with a full stack of trays, and the support frames 1073 move downwards to below the empty tray conveyor line 1071, the trays will be supported on the empty tray conveyor line 1071.

[0032] Since the empty tray conveyor line 1071 is set at a low position to facilitate the handling of trays by workers, the lifting distance of the empty tray handling module 103 when stacking trays is shortened by setting up an empty tray lifting component, thereby improving operating efficiency.

[0033] Positioning plates 108 are respectively provided on both sides of the empty tray conveyor line 1071. The positioning plates 108 extend vertically, and the sidewalls of the tray are positioned by fitting against the positioning plates 108. When the tray is placed in a preset position on the support frame 1073, there may be a small gap between the sides of the tray and the positioning plates 108, or the friction between the two may be small, or the tray may be directly fitted against the positioning plates 108. The positioning plates 108 are used to keep the trays neatly stacked and prevent them from tilting or collapsing.

[0034] Furthermore, a guide surface 109 is provided at the top of the positioning plate 108. The guide surface 109 is inclined inward from top to bottom, and the guide surfaces 109 of the two positioning plates 108 are symmetrically arranged inward to form a shape similar to a trumpet. When there is a slight deviation during the material tray handling process, the guide can be corrected to prevent the material tray from getting stuck when it enters between the two positioning plates 108.

[0035] The working process of the feeding mechanism 100 is as follows: Workers place a tray filled with products onto the receiving conveyor line 102. The tray stops when it reaches its end. At this time, the vision camera 1043 takes a picture of the tray to locate the product position. The multi-axis arm 1041 picks up the products one by one and places them on the platform 1052. The platform 1052 moves the products to below the product conveyor line. During the movement, the products undergo pretreatment at the added ion wind static elimination station. Then the product conveyor line picks up the products and puts them into the subsequent station to complete the product loading. When the products in the tray are all picked up, the empty tray is picked up by the empty tray handling module 103 and placed on the support frame 1073. When the support frame 1073 is full of a whole stack, the support frame 1073 is lowered and the whole stack of empty trays is placed on the empty tray conveyor line 1071. The empty tray conveyor line 1071 moves the whole stack of empty trays one station to buffer them. The staff then remove the empty trays from the empty tray conveyor line 1071.

[0036] like Figures 9 to 14As shown, the dot-jet printing mechanism 200 includes a dot-jet printing machine base 201. A Y-axis slide rail 202 is horizontally arranged on the dot-jet printing machine base 201. A product placement platform 203 is slidably connected to the Y-axis slide rail 202. An R-axis platform 207 is rotatably connected to the product placement platform 203. The rotation axis of the R-axis platform 207 is parallel to the Y-axis slide rail 202. A U-axis platform 208 for placing products (lenses) is rotatably connected to the R-axis platform 207. The rotation axis of the U-axis platform 208 is perpendicular to the Y-axis slide rail 202, thus enabling the product placement module to form a three-axis linkage. An X-axis slide rail 204 is horizontally arranged on the dot-jet printing machine base 201 and above the Y-axis slide rail 202, perpendicular to the Y-axis slide rail 202. A vertically arranged Z-axis slide rail 205 is slidably connected to the X-axis slide rail 204. An inkjet head 206 is slidably connected to the Z-axis slide rail 205, thus enabling the printhead module to form a two-axis linkage. The product placement module and the nozzle module work together to form a five-axis structure, enabling full-dimensional attitude and position control.

[0037] The U-axis platform 208 includes a detachably connected fixture 2082. A CCD camera module 209 and a heating lamp assembly 224 are also provided on the spray gun 201 and above the Y-axis slide rail 202. A backlight plate 210 that cooperates with the CCD camera module 209 is provided on the R-axis platform 207. The backlight plate 210 is also detachably connected to the R-axis platform 207.

[0038] Specifically, a through hole 211 is provided in the middle of the backlight panel 210. The U-axis platform 208 includes a DD motor 2081 fixed on the R-axis platform 207. The fixture 2082 is detachably connected to the output shaft of the DD motor 2081. The DD motor 2081 drives the fixture 2082 to rotate 360°. The fixture 2082 passes through the through hole 211 and rotates in place along the through hole 211. The product is fixed on the fixture 2082. The size of the backlight panel 210 is set to be larger than the size of the product so that it can completely cover the bottom of the product.

[0039] The fixture 2082 includes a vacuum nozzle 2083, which adsorbs and fixes the product to the top of the fixture 2082. A connecting plate 2084 is provided on the peripheral side wall of the vacuum nozzle 2083. The output shaft of the DD motor 2081 has several first mounting slots 212. The connecting plate 2084 has a first connecting hole 213 corresponding to the first mounting slot 212. The connecting plate 2084 is connected to the first mounting slot 212 by bolts or pins passing through the first connecting holes 213, thereby realizing a detachable connection.

[0040] A ring-shaped placement tray 2085 is fitted around the peripheral wall of the vacuum nozzle 2083. The top of the placement tray 2085 is not lower than the top of the vacuum nozzle 2083. In this embodiment, the top of the placement tray 2085 is flush with the top of the vacuum nozzle 2083. By attaching the product to the placement tray 2085, the contact area with the product is increased, making the product more stable and providing support for the product, thus preventing micro-deformation of the product due to localized stress caused by vacuum adsorption.

[0041] Four mounting posts 214 are vertically arranged on the R-axis platform 207 and outside the DD motor 2081. Each mounting post 214 has a second mounting groove 215 at its top. The backlight plate 210 has second connecting holes 216 at its four bottom corners, corresponding to the second mounting grooves 215. The backlight plate 210 is connected to the second mounting grooves 215 via bolts or pins passing through the second connecting holes 216, thus achieving a detachable connection. When the fixture 2082 needs to be disassembled, first remove the placement tray 2085 from the vacuum nozzle 2083, then remove the backlight plate 210 from the mounting posts 214, and finally remove the fixture 2082 from the DD motor 2081, allowing for individual replacement of the fixture 2082.

[0042] In this embodiment, the two ends of the R-axis platform 207 are rotatably connected to the product placement platform 203. A drive motor 217, which is a servo motor 223, is mounted on the product placement platform 203. A harmonic reducer 218 is connected to the output shaft of the drive motor 217, and the rotation shaft of the R-axis platform 207 is connected to the harmonic reducer 218. The drive motor 217 drives the R-axis platform 207 to rotate. Through the harmonic reducer 218 and the servo motor 223, the concentricity of the rotation shaft is ensured, and the rotation angle can reach 90°.

[0043] A gantry 219 is installed on the spray gun 201. The gantry 219 passes over the Y-axis slide rail 202, the X-axis slide rail 204 is installed on one side of the gantry 219, and the heating lamp group 224 is installed on the other side of the gantry 219.

[0044] The heating module uses a thermosetting lamp, which is installed on the moving path of the Y-axis slide rail 202. When the product is loaded onto the product placement table 203, the Y-axis slide rail 202 first moves the product placement table 203 to the bottom of the heating module to preheat the product before continuing the inkjet operation, thereby improving the adhesion of the ink on the product.

[0045] The CCD camera module 209 is fixed on the inkjet head 206 and moves synchronously with the inkjet head 206 along the X and Y axes. The CCD camera module 209 includes a vertically downward-facing camera 2091, and a light source 2092 below the camera 2091. It works in conjunction with the backlight panel 210 on the product placement platform 203 to take pictures of the product. The dot-jet path planning is confirmed by the D-dimension of the product. The dot-jet action is realized by a five-axis linkage system.

[0046] In this embodiment, the inkjet head 206 includes a piezoelectric jet valve 220, equipped with a precision pressure regulating valve to control the inkjet pressure, and a switching valve for pressure relief during ink replacement. By employing the piezoelectric jet valve 220 for inkjet printing, the speckle phenomenon is controlled, and the uniformity of ink thickness is improved.

[0047] In this embodiment, both the Y-axis slide rail 202 and the X-axis slide rail 204 are driven by linear motors 222, while the Z-axis slide rail 205 is driven by a servo motor 223 and a lead screw. A grating ruler 221 is provided along the length of both the Y-axis slide rail 202 and the X-axis slide rail 204.

[0048] like Figures 15 to 18 As shown, the ink wiping mechanism 300 includes an ink wiping housing 301. A feed roller 302 and a take-up roller 303 are rotatably connected to the ink wiping housing 301. A roll of cloth 304 is wound between the feed roller 302 and the take-up roller 303. The take-up roller 303 is driven to rotate by a drive component, thereby driving the roll of cloth 304 to move from the feed roller 302 to the take-up roller 303. The inkjet equipment moves the inkjet head to abut against the roll of cloth 304, so that the roll of cloth 304 wipes the inkjet head during the winding process.

[0049] A flexible block 305 is provided on the ink wiping housing 301. The flexible block 305 is a silicone pad made of silicone material. The flexible block 305 is attached to the other side of the contact between the roll of cloth 304 and the inkjet head. When the inkjet head presses down on the roll of cloth 304, the flexible block 305 can provide elastic support, so that the roll of cloth 304 fits the shape of the inkjet head better.

[0050] The ink removal housing 301 is also equipped with a cup holder, on which an ink discharge cup 314 is placed. Before the inkjet head sprays ink, it needs to discharge the ink remaining in the spray valve after the last inkjet into the ink discharge cup 314. When the ink discharge cup 314 is full, it can be directly removed from the cup holder and poured out.

[0051] Furthermore, a nozzle 307 for conveying cleaning liquid is also provided within the flexible block 305. The flexible block 305 has spray holes 306 on the side facing the rolled cloth 304, and the nozzle 307 sprays the cleaning liquid onto the rolled cloth 304 through the spray holes 306. In this embodiment, the rolled cloth 304 is a lint-free cloth, and the cleaning liquid is alcohol. This ensures that the lint-free cloth carries alcohol during wiping, which, compared to wiping with a single lint-free cloth, can quickly dissolve stubborn residual ink, significantly improving the cleaning effect. The nozzle 307 extends from the bottom of the flexible block 305 and connects to an alcohol source; the alcohol spray is controlled by a spray valve.

[0052] There is a gap between the outlet of the nozzle 307 and the outlet of the nozzle 306. The gap is set so that the inkjet head will not touch the nozzle 307 when it is pressed down. Since the nozzle 307 is made of hard material, the hard contact is avoided to prevent the inkjet head from being worn or the nozzle 307 from being blocked.

[0053] In this embodiment, two reversing wheels 308 are provided on the top of the ink wiping housing 301. The two reversing wheels 308 are at the same height. After the cloth roll 304 comes out from the feed wheel 302, it first passes through the two reversing wheels 308 and then winds onto the take-up wheel 303, thereby forming a cleaning section 310 that moves in a parallel direction on the top of the ink wiping housing 301. This ensures that when the inkjet head is pressed down, the contact surface between the cloth roll 304 and the inkjet head nozzle is relatively flat and the contact area is uniform. A flexible block 305 is disposed below the cleaning section 310. The opening direction of the nozzle 306 is perpendicular to the moving direction of the cloth roll 304, and the exit direction of the nozzle 307 is parallel to the exit direction of the nozzle 306. That is, both the nozzle 306 and the nozzle 307 are vertically arranged.

[0054] The ink wiping housing 301 is also provided with a positioning housing 309. A flexible block 305 is disposed inside the positioning housing 309. The top of the positioning housing 309 has an opening, and the top of the flexible block 305 has a protruding abutment portion 3051 that fits against the roll of cloth 304. The positioning housing 309 includes a detachably connected upper housing 3091 and a lower housing 3092. The lower housing 3092 is fixed to the side wall of the ink wiping housing 301, and the upper housing 3091 is detachably connected to the lower housing 3092 by bolts. A limiting portion 3052 protrudes from the periphery of the flexible block 305, and the upper housing 3091 fits against the upper end face of the limiting portion 3052. That is, during installation, the flexible block 305 is first placed on the lower housing 3092, and then the upper housing 3091 is placed on top of the flexible block 305 and locked with screws to achieve installation. The upper housing 3091 can be removed to replace and repair the flexible block 305.

[0055] The ink wiping housing 301 is equipped with a photoelectric sensor 311 for detecting whether the roll of cloth 304 is used up. The photoelectric sensor 311 is located on the movement path of the roll of cloth 304 from the feed roller 302 to the deflector roller 308. When the roll of cloth 304 is used up, if the photoelectric sensor 311 does not detect the passage of the roll of cloth 304, it will automatically issue an alarm to remind the operator to replace the roll of cloth 304 immediately.

[0056] The ink wiping housing 301 is provided with a fixed-distance wheel 315. The cloth roll 304 passes over the fixed-distance wheel 315 and then enters the take-up wheel 303. When the cloth roll 304 moves, it drives the fixed-distance wheel 315 to rotate. Through the cooperation of the notched disc on the fixed-distance wheel 315 and the slotted photoelectric 316, the cloth roll 304 moves a certain distance each time.

[0057] A drive motor 312 is mounted on the ink wiping housing 301. A drive wheel is mounted on the rotating shaft of the take-up roller 303, and the output shaft of the drive motor 312 is connected to the drive wheel, thereby driving the take-up roller 303 to rotate. A driven wheel is mounted on the rotating shaft of the feed roller 302. The drive wheel and the driven wheel are connected by a synchronous belt 313, so that the feed roller 302 rotates when the take-up roller 303 rotates. A tensioning roller 318 with a horizontally adjustable position is also provided. By adjusting the position of the tensioning roller 318, the synchronous belt 313 is kept taut even after long-term use. A controller 317 is also provided, and the electrical components on the ink wiping housing 301 are coordinated and controlled by the controller 317.

[0058] The working process of the ink wiping mechanism 300 is as follows: After the inkjet equipment completes one inkjet operation, the inkjet head moves above the cleaning section 310 of the ink wiping mechanism 300 according to the instructions of the control system, and moves downward to press the roll cloth 304 onto the flexible block 305. At this time, the drive motor 312 starts to make the roll cloth 304 move horizontally along the cleaning section 310 at a stable speed. At the same time, the nozzle 307 sprays alcohol onto the roll cloth 304 to wet the roll cloth 304, so that the alcohol-containing roll cloth 304 and the inkjet head nozzle generate relative friction to achieve the wiping function.

[0059] like Figures 19 to 23As shown, the pre-fixing mechanism 400 includes a conveyor rail 401, a platform module 402, and a heating module 403. The conveyor rail 401 is arranged horizontally, serving as the basic track for product conveying. The platform module 402 is slidably connected to the conveyor rail 401, used to support and fix the watch lens product to be pre-fixed, and also has a rotation function, so that the product can be heated evenly during the heating process. The heating module 403 is installed above the conveyor rail 401, and includes two heating components 4033 arranged along the conveying direction. The air outlets 4036 of the two heating components 4033 face each other and are both tilted downwards towards the product on the platform module 402, thereby forming a layout that heats the product from both the front and rear sides simultaneously, effectively covering the product surface.

[0060] A first protective cover 404 is installed on the platform module 402. This protective cover has an overall structure with an open top, used to surround the sides and bottom of the product during heating, reducing heat loss and preventing external contamination. A second protective cover 405 is correspondingly provided on the heating module 403. The second protective cover 405 has an opening at the bottom, allowing the hot air generated by the heating component 4033 to be concentrated and sprayed downwards onto the product surface. Together with the first protective cover 404, it forms a relatively closed heating environment, further improving thermal efficiency and isolating external interference.

[0061] The platform module 402 specifically includes a platform frame 4021, a placement platform 4022, and a drive mechanism. The platform frame 4021 is connected to a conveyor rail 401 via a slider and is driven by the conveyor rail 401 to reciprocate along its length. The conveyor rail 401 is a linear guide with a motor and lead screw structure. The placement platform 4022 is rotatably mounted on the platform frame 4021 via the drive mechanism. A vacuum nozzle 4023 protrudes from the top of the placement platform 4022 for adsorbing and fixing the watch lens, preventing displacement during movement or rotation. In this embodiment, the drive mechanism uses a platform motor 4024, which can be a stepper motor or a servo motor, to achieve precise rotation control of the placement platform 4022 and the product.

[0062] The heating module 403 includes a fixedly installed heating frame 4031, on which two adjustable mounting brackets 4032 are provided along the conveying direction. Each mounting bracket 4032 is equipped with a heating element 4033 via a rotating shaft, so that the spacing of the heating elements 4033 can be adjusted not only in the horizontal direction, but also around the rotating shaft within a certain angle, thereby flexibly adjusting the direction and coverage of the hot air jet.

[0063] To achieve horizontal position adjustment of the mounting bracket 4032, a long, narrow first adjusting slide 406 is machined on the heating frame 4031 along the conveying direction of the conveying guide rail 401. A corresponding mounting hole 407 is provided on the mounting bracket 4032. The mounting hole 407 and the first adjusting slide 406 are fixed together by a first fastener, locking the mounting bracket 4032 in the desired position on the first adjusting slide 406, thus accommodating the heating requirements of products of different sizes. The first fastener can be a T-bolt that slides within the first adjusting slide 406, with a nut locked at one end of the T-bolt protruding from the mounting hole 407.

[0064] The heating component 4033 is rotatably connected to mounting brackets 4032 on both sides via rotating shafts. A second adjusting slide 408 is provided on the mounting bracket 4032, located outside the rotating shaft. The second adjusting slide 408 is arc-shaped and coaxial with the center of the rotating shaft. A mounting groove 409 is provided on the side wall of the heating component 4033. The mounting groove 409 and the second adjusting slide 408 are fixed together by a second fastener, which can fix the tilt angle of the heating component 4033, achieving precise adjustment of the direction of the air outlet 4036. The second fastener can be a bolt that passes through the second adjusting slide 408 and is threaded into the mounting groove 409.

[0065] The heating assembly 4033 mainly includes a heating box 4034, which has an air inlet 4035 and an air outlet 4036. A heating rod and a thermocouple 4037 are installed inside the box. Air supplied by an external air source enters the box through the air inlet 4035, is heated by the heating rod to form hot air, and is blown onto the product surface from the air outlet 4036. Thermocouple 4037 is used to monitor the temperature inside the box in real time, and the temperature is controlled by a temperature control component to achieve closed-loop control of the heating process. To further optimize the hot air parameters, a pressure regulating valve and a speed regulating valve can also be installed on the air supply line of the heating assembly 4033 to adjust the outlet air pressure and air speed, respectively, to adapt to different ink types or curing process requirements.

[0066] This pre-curing mechanism 400 also integrates automated loading and unloading functions. A loading module is installed at the inlet end of the conveyor rail 401. This module typically includes a robotic arm or suction cup device sliding on the conveyor line, used to pick up the lens to be pre-cured from the upstream station and precisely place it on the placement platform 4022 of the platform module 402. A corresponding unloading module is installed at the outlet end. After the product has completed pre-curing, the unloading module removes it from the platform and transfers it to a subsequent station or tray for unloading, achieving fully automated operation.

[0067] The working process of the pre-fixed mechanism 400 is as follows: Before starting the operation, adjust the horizontal distance and tilt angle of the two heating components 4033 according to the size and shape of the lens to be processed to ensure that the hot air can evenly cover the surface of the lens. At the same time, set the appropriate air pressure and air speed through the pressure regulating valve and speed regulating valve, and set the heating temperature through the thermocouple 4037 and temperature control system.

[0068] After the equipment is started, the feeding module picks up the ink-coated lens from the feeding position and places it on the placement platform 4022 of the platform module 402. The vacuum nozzle 4023 is activated to firmly adsorb the lens. Subsequently, the conveyor rail 401 drives the platform module 402 to move the product to the pre-fixation station directly below the heating module 403.

[0069] Upon reaching the designated position, the motor of the stage module 402 starts, driving the placement stage 4022 and the product to rotate at a uniform speed. Simultaneously, the two heating components 4033 activate, blowing hot air from the opposing and downward-sloping air outlets 4036, working together to heat the rotating lens surface. Because the hot air covers the lens from both front and rear directions, combined with the lens's own rotation, all areas of the lens surface, especially the edges and curved parts, receive uniform heat, preventing curing blind spots or excessive temperature differences.

[0070] After pre-fixation, the conveyor rail 401 delivers the platform module 402 to the unloading mechanism's station. The vacuum nozzle 4023 releases the lens, which the unloading mechanism picks up and transfers to the empty tray. The platform module 402 returns to the loading station, ready to receive the next product, thus achieving continuous automated production.

[0071] The unloading mechanism 600 includes a receiving conveyor line, a product handling module, an intermediate transfer platform, an empty tray handling module, and an empty tray buffer module. Its specific structural composition corresponds to that of the loading mechanism and will not be described in detail here; the difference lies in the working sequence. First, the empty tray handling module moves the empty tray from the empty tray buffer module to the receiving conveyor line. Then, the product handling module grabs the pre-fixed products from the pre-fixing mechanism and places them into the tray. Once the tray is full, the receiving conveyor line delivers the unloaded product.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present invention should be included within the protection scope of the present invention.

[0073] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A light-shielding inkjet device for watch lenses, characterized in that, Including product conveyor lines, and also: The feeding mechanism sequentially transports the products in the material tray to the product conveyor line and unloads the empty material tray. The product conveyor line then transports the products to the dot spraying mechanism. The dot-jet mechanism is equipped with an inkjet head that is movably mounted. The inkjet head is controlled to eject ink through a piezoelectric jet valve. The inkjet head sprays ink onto the light-shielding surface of the product. The inkjet head can be moved to the ink-wiping mechanism. The ink wiping mechanism is equipped with a roll of cloth, which is moved to wipe the inkjet head. It is also equipped with a nozzle for spraying cleaning liquid onto the roll of cloth. The pre-fixing mechanism is equipped with a platform module and a heating module. The heating module heats and pre-fixes the product, while the platform module drives the product to rotate. The unloading mechanism transports the pre-fixed products to an empty tray and unloads the full tray. The feeding mechanism, the dot spraying mechanism, and the pre-fixing mechanism are arranged in sequence, and the product conveying line extends from the feeding mechanism to the pre-fixing mechanism.

2. The watch lens light-shielding inkjet device according to claim 1, characterized in that, The feeding mechanism includes a feeding machine platform, which is equipped with a receiving conveyor line, a product handling module, an intermediate transfer platform, and an empty pallet handling module. The material tray enters the loading machine from the receiving conveyor line. The product handling module picks up the products from the material tray one by one and places them onto the intermediate transfer platform. The intermediate transfer platform transports the products toward the product conveyor line. The product conveyor line picks up the products from the intermediate transfer platform and sends them to the dot spraying mechanism. The empty tray handling module picks up the empty material tray from the receiving conveyor line.

3. The watch lens light-shielding inkjet device according to claim 2, characterized in that, The loading machine platform is equipped with an empty tray buffer module and an empty tray lifting assembly. The empty tray buffer module includes an empty tray conveyor line, the length of which is at least greater than the length of two trays. The empty tray lifting assembly includes a lifting guide rail arranged vertically, and two support frames for placing trays are slidably connected to the lifting guide rail. The support frames extend above the empty tray conveyor line, and the two support frames are respectively located on both sides of the empty tray conveyor line. The empty tray handling module grabs empty trays from the receiving conveyor line and stacks them onto the support frames. After a stack is full, the support frames descend and place the trays on the empty tray conveyor line. The empty tray conveyor line can drive the trays to move.

4. The watch lens light-shielding inkjet device according to claim 2, characterized in that, An ion wind assembly is installed on the conveying path of the intermediate transfer platform, which is used to eliminate static electricity from the product.

5. The watch lens light-shielding inkjet device according to claim 1, characterized in that, The dot-jet printing mechanism includes a dot-jet printing machine platform. A Y-axis slide rail is arranged horizontally on the dot-jet printing machine platform. A product placement platform is slidably connected to the Y-axis slide rail. An X-axis slide rail is arranged horizontally on the dot-jet printing machine platform and above the Y-axis slide rail, perpendicular to the Y-axis slide rail. A vertically arranged Z-axis slide rail is slidably connected to the X-axis slide rail. The inkjet head is slidably connected to the Z-axis slide rail. An R-axis platform is rotatably connected to the product placement platform. The rotation axis of the R-axis platform is parallel to the Y-axis slide rail. A U-axis platform for placing products is rotatably connected to the R-axis platform. The rotation axis of the U-axis platform is perpendicular to the Y-axis slide rail. The U-axis platform includes a detachably connected fixture. A CCD camera module is also provided on the dot spraying machine platform and above the Y-axis slide rail. A backlight plate that cooperates with the CCD camera module is provided on the R-axis platform.

6. The watch lens light-shielding inkjet device according to claim 1, characterized in that, The ink wiping mechanism includes an ink wiping housing, on which a feeding wheel and a take-up wheel are rotatably connected. The roll of cloth is wound between the feeding wheel and the take-up wheel. The take-up wheel drives the roll of cloth to move. A flexible block is provided on the ink wiping housing. The flexible block is attached to the other side of the point where the roll of cloth abuts against the inkjet head. The nozzle is provided inside the flexible block. The flexible block has a spray hole on the side facing the roll of cloth. The nozzle sprays cleaning liquid onto the roll of cloth through the spray hole.

7. The watch lens light-shielding inkjet device according to claim 6, characterized in that, The ink wiping housing is provided with a positioning housing, the flexible block is disposed inside the positioning housing, the top of the positioning housing has an opening, the top of the flexible block has a protruding abutting part that protrudes from the opening, the abutting part is in contact with the rolled cloth, the positioning housing includes a detachably connected upper housing and a lower housing, the flexible block has a limiting part protruding from its periphery, and the upper housing is in contact with the upper end face of the limiting part.

8. The watch lens light-shielding inkjet device according to claim 1, characterized in that, The pre-fixing mechanism includes a conveying guide rail, the platform module is slidably connected to the conveying guide rail, the heating module is disposed above the conveying guide rail, and the heating module includes two heating components arranged along the conveying direction of the conveying guide rail, the heating ports of the two heating components are arranged facing each other, and the heating ports of the two heating components are inclined downward.

9. The watch lens light-shielding inkjet device according to claim 8, characterized in that, The platform module is provided with a first protective cover, the top of which has an opening, and the heating module is provided with a second protective cover, the bottom of which has an opening.

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