Laser black marking device for glass surface

Abstract

The invention discloses a glass surface black mark laser marking device, which relates to the technical field of automatic glass deep processing production lines and comprises a machine body displacement mechanism, a laser marking mechanism, a coiled material conveying and recycling mechanism, a cleaning mechanism and a pressing and positioning mechanism. The machine body displacement mechanism of a specific structure is adopted, the overall position of the device and the vertical height of the laser marking mechanism can be flexibly adjusted, a galvanometer and field lens assembly in the laser marking mechanism is matched for application, it is ensured that laser beams can accurately deflect and focus, and a laser marking coiled material is tightly attached to the surface of glass in combination with the pressing and positioning mechanism; gaps are prevented from being generated in the marking process, and the forming precision and consistency of marks are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of automated glass deep processing production line technology, and more specifically, to a device for laser marking black marks on glass surfaces. Background Technology

[0002] Glass, with its transparency, corrosion resistance, and stable mechanical properties, is widely used in various fields such as electronics, medical devices, daily utensils, the automotive industry, and architectural decoration. In practical applications, it is often necessary to create permanent markings on the glass surface, such as trademarks, serial numbers, production dates, and barcodes, to achieve functions such as product traceability and brand identification. Traditional glass marking methods mainly include screen printing and inkjet printing; however, these methods have significant drawbacks: screen-printed markings have poor adhesion and are prone to wear and peeling over long-term use; the inks used in inkjet printing may contain harmful substances, failing to meet environmental protection requirements, and the markings lack durability.

[0003] Laser marking technology has gradually become the preferred solution for glass marking due to its advantages such as permanence, non-contact processing, high precision, and environmental friendliness. However, ordinary soda-lime glass has high transmittance in the near-infrared band, such as the commonly used 1064nm fiber laser, making it difficult to form effective marks by direct laser irradiation. Existing direct ablation methods not only easily cause micro-cracks in the glass, affecting its structural integrity, but also form white, easily detachable, fragmented marks with low contrast, and their aesthetics and durability fail to meet practical application requirements. To improve the effect of laser marking on glass, two main directions of improvement have emerged in existing technologies: one is to use a laser-sensitive coating with a specific formula, forming a mark through the interaction between the coating and the laser; the other is to use an ultrafast laser and adjust the laser parameters to optimize the marking effect. However, the former method has the problem of complex process, requiring additional coating and cleaning processes, which prolongs the production cycle; the latter method has the problem of high cost of ultrafast lasers, which leads to a significant increase in equipment investment costs. Moreover, both methods are difficult to achieve stable preparation of black markings, and the marking color is relatively monotonous. Therefore, developing a laser marking device that is simple in process, low in cost, and can form high-contrast, strong and durable black markings on ordinary glass has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] In view of the problems in related technologies, the present invention proposes a device for laser marking black marks on glass surfaces to overcome the aforementioned technical problems existing in the existing related technologies.

[0005] The technical solution of this invention is implemented as follows:

[0006] A device for laser marking black marks on glass surfaces includes: a body displacement mechanism, a laser marking mechanism, a roll material conveying and recycling mechanism, a cleaning mechanism, and a clamping and positioning mechanism;

[0007] The machine displacement mechanism is used to drive the entire device to reciprocate along the X-axis and adjust the vertical height of the laser marking mechanism; the laser marking mechanism is used to emit laser and focus it on the glass surface to form a black mark; the roll material conveying and recycling mechanism is used to convey and recycle the laser marking roll material; the cleaning mechanism is used to clean the area to be laser marked; and the pressing and positioning mechanism is used to press the laser marking roll material tightly against the glass surface.

[0008] Furthermore, the machine body displacement mechanism includes: an assembly plate, on which a first drive motor is fixedly mounted, the output end of which is used to engage with the crossbeam of the equipment frame platform; an adjustment plate is fixedly mounted on one side of the assembly plate, a threaded rod is inserted into the adjustment plate, the end of the threaded rod is connected to the output end of a second drive motor mounted on the adjustment plate, and a threaded block is engaged on the threaded rod, the threaded block is connected to a support plate, and a bearing plate is fixedly connected to one side of the support plate; the laser marking mechanism, the roll material conveying and recycling mechanism, the cleaning mechanism, and the pressing and positioning mechanism are respectively mounted on the support plate.

[0009] Furthermore, the laser marking mechanism includes: a fiber laser body and a fiber laser lens, the fiber laser body and the fiber laser lens are connected by fiber optic coupling, the fiber laser body is disposed on an assembly plate, the fiber laser lens is disposed on the carrier plate, and the light-emitting end of the fiber laser lens is provided with a galvanometer field lens assembly; and the fiber laser body emits near-infrared laser with a wavelength of 1064nm.

[0010] Furthermore, the roll material conveying and recycling mechanism includes: an unwinding roller, a first recycling roller, and a second recycling roller respectively disposed on one side of the assembly plate. The first recycling roller and the second recycling roller are respectively located on one side of the unwinding roller, and servo motors are respectively connected to the ends of the unwinding roller, the first recycling roller, and the second recycling roller. The unwinding roller is used to hold the laser-engraved roll material.

[0011] Furthermore, the cleaning mechanism includes a dust cleaning brush disposed on one side of the assembly plate, the dust cleaning brush being disposed on one side of the unwinding roller.

[0012] Furthermore, the clamping and positioning mechanism includes: a microcrystalline plate disposed on one side of the assembly plate, clamping rollers and a telescopic cylinder, wherein there are at least two sets of clamping rollers, and the two sets of clamping rollers are disposed on both sides of the microcrystalline plate, and the output end of the telescopic cylinder is provided with a suction cup, which is connected to the microcrystalline plate; the microcrystalline plate is adapted to the fiber laser lens.

[0013] Furthermore, it also includes an auxiliary control module, which is electrically connected to the first drive motor, the second drive motor, the fiber laser body, the servo motor, and the telescopic cylinder.

[0014] The beneficial effects of this invention are:

[0015] This invention integrates a body displacement mechanism, a laser marking mechanism, a roll material conveying and recycling mechanism, a cleaning mechanism, and a clamping and positioning mechanism into one unit. This achieves fully automated operation from cleaning the area to be marked, conveying and bonding the laser-engraved roll material, to precise laser marking and roll material recycling. This significantly simplifies the production process, eliminating the need for additional complex processes such as coating and cleaning, effectively shortening the production cycle, and adapting to mass production needs. By employing a specifically structured body displacement mechanism, the overall position of the device and the vertical height of the laser marking mechanism can be flexibly adjusted. Combined with the application of the galvanometer and field lens components in the laser marking mechanism, this ensures precise deflection and focusing of the laser beam. The clamping and positioning mechanism tightly adheres the laser-engraved roll material to the glass surface, avoiding gaps during marking and significantly improving the forming accuracy and consistency of the markings. Laser marking roll material uses a high-temperature resistant, high-transmittance polyester film as the substrate and is coated with a special absorption layer. It can efficiently absorb near-infrared laser energy and transfer it to the glass surface, causing a stable black mark to form. This solves the problems of unstable black mark preparation and limited color options in existing technologies. Furthermore, the resulting black mark has strong adhesion to the glass surface, excellent aesthetics, and meets the visual and functional requirements of practical applications. Simultaneously, the cleaning mechanism uses soft, wear-resistant nylon bristles to clean dust and dirt from the marking area without scratching the glass surface. The microcrystalline plate of the clamping and positioning mechanism has excellent high-temperature resistance and wear resistance. Combined with the non-contact laser processing method, it effectively prevents micro-cracks from forming in the glass during marking, ensuring the structural integrity of the glass. It eliminates the need for expensive ultrafast lasers, resulting in lower equipment investment costs. Moreover, the entire marking process does not use inks containing harmful substances, meeting environmental protection requirements. This provides a simple, cost-effective, efficient, and reliable solution for the preparation of permanent black marks on glass surfaces. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a device for laser marking black marks on a glass surface according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of a device for laser marking black marks on a glass surface according to an embodiment of the present invention;

[0019] Figure 3 This is a front view of a device for laser marking black marks on a glass surface according to an embodiment of the present invention;

[0020] Figure 4 This is a side view of a device for laser marking black marks on a glass surface according to an embodiment of the present invention;

[0021] Figure 5 This is a top view of a device for laser marking black marks on a glass surface according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the operation of a laser marking device for black marking on a glass surface according to an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Body displacement mechanism; 2. Laser marking mechanism; 3. Roll material conveying and recycling mechanism; 4. Cleaning mechanism; 5. Pressing and positioning mechanism;

[0025] 11. Assembly plate; 12. First drive motor; 13. Adjusting plate; 14. Threaded rod; 15. Second drive motor; 16. Support plate; 17. Bearing plate; 18. Threaded block;

[0026] 21. Fiber laser body; 22. Fiber laser lens;

[0027] 31. Unwind roller; 32. First take-up roller; 33. Second take-up roller; 34. Servo motor;

[0028] 41. Dust cleaning brush;

[0029] 51. Microcrystalline plate; 52. Pressing roller; 53. Telescopic cylinder; 54. Suction cup. Detailed Implementation

[0030] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0031] According to an embodiment of the present invention, a device for laser marking black marks on a glass surface is provided.

[0032] like Figures 1-5As shown, the glass surface laser marking device according to an embodiment of the present invention includes: a body displacement mechanism 1, a laser marking mechanism 2, a roll material conveying and recycling mechanism 3, a cleaning mechanism 4, and a pressing and positioning mechanism 5;

[0033] Among them, such as Figure 6 As shown, the body displacement mechanism 1 includes: an assembly plate 11, on which a first drive motor 12 is fixedly mounted. The output end of the first drive motor 12 is used to mesh with the crossbeam of the equipment frame platform to realize the reciprocating movement of the entire device along the X-axis.

[0034] An adjusting plate 13 is fixedly provided on one side of the assembly plate 11. A threaded rod 14 is inserted into the adjusting plate 13. The end of the threaded rod 14 is connected to the output end of the second drive motor 15 provided on the adjusting plate 13. A threaded block 18 is engaged on the threaded rod 14. The threaded block 18 is connected to a support plate 16. A bearing plate 17 is fixedly connected to one side of the support plate 16. The laser marking mechanism 2, the roll material conveying and recycling mechanism 3, the cleaning mechanism 4, and the pressing and positioning mechanism 5 are respectively assembled on the support plate 16.

[0035] The laser marking mechanism 2 includes: a fiber laser body 21 and a fiber laser lens 22. The fiber laser body 21 and the fiber laser lens 22 are connected by fiber coupling. The fiber laser body 21 is disposed on the mounting plate 11, and the fiber laser lens 22 is disposed on the carrier plate 17. The light-emitting end of the fiber laser lens 22 is provided with a galvanometer field lens assembly.

[0036] Specifically, such as Figure 2 As shown, the second drive motor 15 drives the threaded rod 14 to drive the threaded block 18 and the linkage adjustment plate 13, so as to realize the vertical lifting of the assembly plate 11 and the fiber laser lens 22, thereby adjusting the distance between the fiber laser lens 22 and the glass surface. The galvanometer field lens assembly is installed at the light output end of the fiber laser lens 22 to realize the precise deflection and focusing of the laser beam.

[0037] The roll material conveying and recycling mechanism 3 includes: an unwinding roller 31, a first recycling roller 32, and a second recycling roller 33 respectively disposed on one side of the assembly plate 11. The first recycling roller 32 and the second recycling roller 33 are respectively located on one side of the unwinding roller 31, and the ends of the unwinding roller 31, the first recycling roller 32, and the second recycling roller 33 are respectively connected to a servo motor 34. The unwinding roller 31 is used to mount the laser-engraved roll material.

[0038] In this technical solution, servo motors 34 are respectively mounted on the other side of the assembly plate 11. The laser-etched roll material is wound on the unwinding roller 31. The laser-etched roll material uses a high-temperature resistant, high-transmittance polyester film as the substrate, and the surface is coated with a special absorption layer, which can absorb near-infrared laser energy and transfer it to the glass surface, promoting the formation of black markings on the glass surface. The first take-up roller 32 and the second take-up roller 33 are respectively located on the other side of the fiber laser lens 22.

[0039] The cleaning mechanism 4 includes a dust cleaning brush 41 located on one side of the assembly plate 11. The dust cleaning brush 41 is located on one side of the unwinding roller 31 and is used to clean the area to be laser-marked.

[0040] The dust cleaning brush 41 is fixed on the assembly plate 11 by a bracket and is located in front of the laser marking area. Its bristles are made of soft and wear-resistant nylon material to avoid scratching the glass surface.

[0041] like Figure 3 As shown, the clamping and positioning mechanism 5 includes: a microcrystalline plate 51 disposed on one side of the assembly plate 11, clamping rollers 52 and telescopic cylinder 53. There are at least two sets of clamping rollers 52, and the two sets of clamping rollers 52 are disposed on both sides of the microcrystalline plate 51. The output end of the telescopic cylinder 53 is provided with a suction cup 54, and the suction cup 54 is connected to the microcrystalline plate 51.

[0042] In this technical solution, the fiber laser lens 22 is adapted to the microcrystalline plate 51, and the laser-etched roll is wound sequentially by the unwinding roller 31 onto one side pressing roller 52, the microcrystalline plate 51, the other side pressing roller 52, the first take-up roller 32, and the second take-up roller 33. The microcrystalline plate 51 is used to bond the laser-etched roll to the glass surface.

[0043] Among them, the microcrystalline plate 51 is made of high-strength microcrystalline material, which has good high temperature resistance and wear resistance. The telescopic cylinder 53 drives the microcrystalline plate 51 to press down, so that the laser-engraved roll material is tightly attached to the glass surface, avoiding gaps between the laser-engraved roll material and the glass during the marking process, which would affect the marking quality.

[0044] In addition, it also includes: an auxiliary control module, which is used to electrically connect to the first drive motor 12, the second drive motor 15, the fiber laser body 21, the servo motor 34 and the telescopic cylinder 53 respectively.

[0045] Specifically, the auxiliary control module is a PLC controller, which can be a Siemens S7-200SMART series.

[0046] Using the above technical solution, the specific operational steps during implementation are as follows:

[0047] The glass to be marked is placed on the equipment frame table in advance, and the glass is fixed according to the glass size. The marking pattern, such as trademark, serial number, marking size and marking position, is preset.

[0048] The auxiliary control module issues a work command, and the first drive motor 12 in the body displacement mechanism 1 works with the crossbeam to move the whole device to the designated marking position. Simultaneously, the dust cleaning brush 41 cleans the marking area to remove dust and dirt from the glass surface.

[0049] Servo motor 34 controls the first rewind roller 32 to release the laser-etched roll material, and drives the first rewind roller 32 and the second rewind roller 33 to rotate. Together with the clamping roller 52, the laser-etched roll material is transported to the marking area and laid between the glass surface and the microcrystalline plate 51.

[0050] The second drive motor 15 drives the threaded rod 14 to drive the threaded block 18 and the linkage adjustment plate 13, so that the assembly plate 11 and the fiber laser lens 22 move downward in the vertical direction. When the fiber laser lens 22 is at a suitable distance from the glass table, the transmission stops.

[0051] The telescopic cylinder 53 is activated to drive the microcrystalline plate 51 to press down, tightly adhering the laser-etched roll material to the glass surface; the fiber laser body 21 is activated to emit a near-infrared laser with a wavelength of 1064nm. After the laser beam is deflected and focused by the galvanometer and field mirror assembly of the fiber laser lens 22, it acts on the glass surface through the laser-etched roll material. The laser energy is absorbed by the glass surface, causing local microstructural changes on the glass surface, forming a black mark.

[0052] After marking is completed, the fiber laser body 21 stops working, the telescopic cylinder 53 resets, and the microcrystalline plate 51 is lifted; and the fiber laser lens 22 is driven to rise and reset; the first recycling roller 32 and the second recycling roller 33 continue to rotate to recycle the used laser marking roll; the operator can remove the marked glass, and the device returns to its initial state, waiting for the next operation.

[0053] Specifically, the device used in this embodiment marks the glass surface, producing a black mark with high contrast and strong adhesion to the glass surface. Adhesion tests, namely the cross-cut adhesion test, show no peeling after tape application, and abrasion tests, namely, rubbing a cotton cloth wrapped with a 500g weight 500 times without significant wear, all of which meet the requirements for industrial applications. Furthermore, no cracks are generated on the glass during the marking process, and the marking is clear and aesthetically pleasing, making it suitable for mass production.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art, upon considering the disclosure in the specification and embodiments, will readily conceive of other embodiments of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0055] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A device for laser marking black marks on a glass surface, characterized in that, include: The machine body displacement mechanism (1), laser marking mechanism (2), roll material conveying and recycling mechanism (3), cleaning mechanism (4) and pressing and positioning mechanism (5); The machine displacement mechanism (1) is used to drive the entire device to move back and forth along the X-axis and adjust the vertical height of the laser marking mechanism (2); the laser marking mechanism (2) is used to emit laser and focus it on the glass surface to form a black mark; the roll material conveying and recycling mechanism (3) is used to convey and recycle the laser marking roll material; the cleaning mechanism (4) is used to clean the area to be laser marked; and the pressing and positioning mechanism (5) is used to press the laser marking roll material tightly against the glass surface.

2. The device for laser marking black marks on glass surfaces according to claim 1, characterized in that, The body displacement mechanism (1) includes: an assembly plate (11), on which a first drive motor (12) is fixedly mounted, the output end of which is used to engage with the crossbeam of the equipment frame table; an adjustment plate (13) is fixedly mounted on one side of the assembly plate (11), a threaded rod (14) is inserted in the adjustment plate (13), the end of the threaded rod (14) is connected to the output end of a second drive motor (15) mounted on the adjustment plate (13), and a threaded block (18) is engaged on the threaded rod (14), the threaded block (18) is connected to a support plate (16), and a bearing plate (17) is fixedly connected to one side of the support plate (16); the laser marking mechanism (2), the roll material conveying and recycling mechanism (3), the cleaning mechanism (4) and the pressing and positioning mechanism (5) are respectively mounted on the support plate (16).

3. The device for laser marking black marks on glass surfaces according to claim 2, characterized in that, The laser marking mechanism (2) includes: a fiber laser body (21) and a fiber laser lens (22). The fiber laser body (21) and the fiber laser lens (22) are connected by fiber coupling. The fiber laser body (21) is mounted on the assembly plate (11), and the fiber laser lens (22) is mounted on the carrier plate (17). The light-emitting end of the fiber laser lens (22) is provided with a galvanometer field lens assembly. The fiber laser body (21) emits near-infrared laser with a wavelength of 1064nm.

4. The device for laser marking black marks on glass surfaces according to claim 3, characterized in that, The roll material conveying and recycling mechanism (3) includes: an unwinding roller (31), a first recycling roller (32), and a second recycling roller (33) respectively disposed on one side of the assembly plate (11). The first recycling roller (32) and the second recycling roller (33) are respectively located on one side of the unwinding roller (31), and the ends of the unwinding roller (31), the first recycling roller (32), and the second recycling roller (33) are respectively connected to a servo motor (34). The unwinding roller (31) is used to mount the laser-engraved roll material.

5. The device for laser marking black marks on glass surfaces according to claim 4, characterized in that, The cleaning mechanism (4) includes a dust cleaning brush (41) disposed on one side of the assembly plate (11), the dust cleaning brush (41) being disposed on one side of the unwinding roller (31).

6. The device for laser marking black marks on a glass surface according to claim 5, characterized in that, The clamping and positioning mechanism (5) includes: a microcrystalline plate (51) disposed on one side of the assembly plate (11), clamping rollers (52) and telescopic cylinder (53). There are at least two sets of clamping rollers (52), and the two sets of clamping rollers (52) are disposed on both sides of the microcrystalline plate (51). The output end of the telescopic cylinder (53) is provided with a suction cup (54), and the suction cup (54) is connected to the microcrystalline plate (51). The microcrystalline plate (51) is adapted to the fiber laser lens (22).

7. The device for laser marking black marks on a glass surface according to claim 6, characterized in that, It also includes an auxiliary control module, which is electrically connected to the first drive motor (12), the second drive motor (15), the fiber laser body (21), the servo motor (34) and the telescopic cylinder (53), respectively.

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