A gasket laser marking apparatus and method of use

Abstract

The application provides a sealing gasket laser marking device and a use method, which comprise a feeding mechanism, a conveying mechanism, a marking mechanism and a control assembly, the feeding mechanism comprises a feeding bin, a vibrating disc and a guide groove, the feeding bin is arranged above the vibrating disc and is used for putting the sealing gaskets into the vibrating disc; the vibrating disc comprises a vibrating disc hopper and a spiral track arranged in the vibrating disc hopper, the spiral track is arranged in a spiral shape towards the opening direction of the vibrating disc hopper; a first code reader and a first air pipe are arranged through the vibrating disc hopper on the side of the spiral track, and the control sources of the first code reader and the first air pipe are in communication connection with the control assembly; one end of the guide groove is connected with the outlet of the vibrating disc hopper, and the other end is connected with the end of the conveying mechanism. The application solves the problems of low automation degree of the marking device, complicated double-side marking operation of the sealing gasket and the problem that the marking contents of the front and back sides of the sealing gasket cannot be associated in the prior art.

Description

Technical Field

[0001] This invention relates to the field of marking equipment for bottle cap sealing gaskets, and in particular to a laser marking device for sealing gaskets and its usage method. Background Technology

[0002] In the beverage processing industry, a sealing gasket is typically added to the inside of the bottle cap, and markings are usually applied to the gasket for traceability and recording. Currently, most operations involve manually loading the gasket into a gasket holder, which then guides the gasket into the marking equipment's working range. The marking equipment marks the gasket, and after marking, the gasket is manually unloaded and removed. Defective gaskets are then manually inspected and rejected. This process is fraught with inconsistencies and requires improvement.

[0003] In addition, some beverage companies on the market currently add promotional patterns or text to the sealing gaskets of their drinks to increase sales and seize market share, thereby stimulating consumption. This requires double-sided marking of the sealing gaskets. If the existing technology is used, manual feeding is required twice, which greatly increases labor costs. Furthermore, manual attention is required to ensure that the blank side of the sealing gasket is facing up during double-sided marking. Some merchants also require that the marking content on both sides of the sealing gasket be linked, thus requiring higher intelligence from the marking equipment. Therefore, there is an urgent need to improve the existing marking equipment. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a laser marking device and method for sealing gaskets, which can perform both single-sided and double-sided marking, and can link the marking content on both sides or make the marking content on both sides independent. This solves the problems of low automation of marking devices, cumbersome double-sided marking operation of sealing gaskets, and inability to link the marking content on both sides in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides a laser marking device for sealing gaskets, including a feeding mechanism, a transmission mechanism, a marking mechanism, and a control component. The feeding mechanism includes a feeding hopper, a vibrating plate, and a guide groove. The feeding hopper is located above the vibrating plate and is used to feed the sealing gasket into the vibrating plate. The vibrating plate includes a vibrating plate hopper and a spiral track disposed within the vibrating plate hopper. The spiral track is spirally arranged towards the opening of the vibrating plate hopper. A first barcode reader and a first air pipe are disposed through the vibrating plate hopper on the side of the spiral track. The control sources of the first barcode reader and the first air pipe are both communicatively connected to the control component. One end of the guide groove is connected to the outlet of the vibrating plate hopper, and the other end is connected to the end of the transmission mechanism. The sealing gasket flows into the transmission mechanism through the guide groove. A second barcode reader is disposed below the guide groove and is communicatively connected to the control component.

[0006] Preferably, the sealing gasket laser marking equipment further includes a verification mechanism and a defective product separation mechanism, and the control component is communicatively connected to the transmission mechanism, the marking mechanism, the verification mechanism, and the defective product separation mechanism.

[0007] Preferably, the transmission mechanism includes a transmission base frame, a transmission drive motor, a drive shaft, a driven shaft, a transmission belt, and a guide rail. The drive shaft and the driven shaft are located at both ends of the transmission base frame, and bearing end caps are provided at both axial ends of the drive shaft and the driven shaft. The transmission drive motor is connected to the drive shaft for transmission. The drive shaft is connected to the driven shaft through the transmission belt. The guide rail is located on the top surface of the bearing end caps and the transmission base frame to guide the movement of the sealing gasket on the transmission belt.

[0008] Preferably, the marking mechanism includes a marking bracket, a laser marking head, and a marking head controller. The transmission mechanism passes through the marking bracket, and the laser marking head marks the sealing gasket on the transmission mechanism. The marking head controller is communicatively connected to the control component and the laser marking head.

[0009] Preferably, the marking bracket is internally provided with a marking base plate and a marking head lifting plate. Both the marking base plate and the marking head lifting plate are provided with a screw and several guide rods. The guide rods are connected to the marking base plate by a linear bearing. The screw is connected to the marking head lifting plate by a thread. A handwheel is also fixedly provided on the screw. The laser marking head is provided on the marking head lifting plate.

[0010] Preferably, a dust collection assembly is also provided on the lower side of the laser marking head. The dust collection assembly includes a fixed connecting block, a top frame, a bottom frame, and an outer peripheral glass cover. The fixed connecting block is vertically fixed on the transmission mechanism. The top frame and the bottom frame are both set on the fixed connecting block, with the top frame located above the bottom frame. The outer peripheral glass cover is set between the top frame and the bottom frame. The top frame is set on the outer periphery of the laser marking head, and a smoke extraction port is opened on the top frame. The smoke extraction port is connected to an external smoke treatment assembly.

[0011] Preferably, the top of the marking bracket is provided with an adapter plate, the adapter plate is provided with a rotating seat, and the rotating seat is provided with a control panel; the control panel includes a display screen, a keyboard, and function keys, and the control component is communicatively connected to the display screen, keyboard, and function keys.

[0012] Preferably, the verification mechanism includes a third barcode reader, a verification base, and a light source. The third barcode reader is located above the transmission mechanism and is used to verify the marking code on the sealing gasket in the transmission mechanism. The verification base is located on the transmission mechanism below the third barcode reader and has through holes running through its top and bottom. The light source is located on the verification base. The third barcode reader is communicatively connected to the control component.

[0013] Preferably, the defective product separation mechanism includes a second air pipe, a solenoid valve for controlling the opening and closing of the air passage in the second air pipe, a baffle, and a defective product collection box. The second air pipe passes through the side wall of the calibration base. The baffle is located in the direction of air ejection in the second air pipe. The defective product collection box is located below the baffle. The solenoid valve is communicatively connected to the control component.

[0014] To achieve the above or other objectives, the present invention also discloses a method for using a laser marking device for sealing gaskets, wherein the laser marking device for sealing gaskets described above comprises the following steps:

[0015] S1: The sealing gasket to be marked is fed into the vibratory feeder through the feeding hopper, and the working sealing gasket of the vibratory feeder enters the spiral track;

[0016] S2: The first barcode reader on the side of the spiral track detects the end face of the sealing gasket facing the first barcode reader. If a marking code is detected, the first barcode reader feeds back information to the control component. The control component opens the first air pipe, and the first air pipe works to spray the sealing gasket back into the vibratory feeder hopper.

[0017] S3: The sealing gasket on the spiral track enters the transmission mechanism through the guide groove. The second barcode reader below the guide groove detects that the sealing gasket is facing the end face of the second barcode reader and feeds back information to the control component based on the detection result. The control component sends information to the marking mechanism based on the feedback information.

[0018] S4: The transmission mechanism transmits the sealing gasket to the working area of ​​the marking mechanism, and the marking mechanism marks the end face of the sealing gasket according to the information sent by the control component.

[0019] As described above, the sealing gasket laser marking equipment and method of the present invention have the following beneficial effects:

[0020] The present invention relates to a laser marking device and method for sealing gaskets, comprising a vibratory feeder, a transmission mechanism, and a guide groove, with the vibratory feeder and the transmission mechanism connected to opposite ends of the guide groove. A first code reader and a first air pipe are disposed on the side of the spiral track of the vibratory feeder. When the first code reader detects a marking code on the end face of the sealing gasket, the first air pipe blows the sealing gasket back into the vibratory feeder (the end face of the sealing gasket facing the first code reader will be upward in the guide groove, i.e., the marked side will face upward). When the sealing gasket enters the guide groove, the second barcode reader on the lower side of the guide groove detects the bottom surface of the sealing gasket. If the bottom surface of the sealing gasket is blank, it proves that both the top and bottom surfaces of the sealing gasket are blank. The second barcode reader feeds the information back to the control component, and the control component calls the corresponding program. If there is a marking code on the bottom surface of the sealing gasket, it proves that there is a marking code on the bottom surface and no marking code on the top surface. The second barcode reader feeds the information back to the control component, and the control component calls the corresponding program to make the marking code on the top surface of the sealing gasket the same as, match, or be independent of the marking code on the bottom surface. This solves the problems of low automation of marking equipment, cumbersome double-sided marking operation of sealing gaskets, and inability to associate the marking content on the front and back sides of the sealing gasket in the existing technology. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the sealing gasket laser marking equipment of the present invention;

[0022] Figure 2 This is a spatial schematic diagram of the vibratory feeder of the laser marking equipment for sealing gaskets of the present invention;

[0023] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 4 This is a first-angle spatial schematic diagram of the marking mechanism of the laser marking equipment for sealing gaskets of the present invention;

[0025] Figure 5 This is a second-angle spatial schematic diagram of the marking mechanism of the laser marking equipment for sealing gaskets of the present invention;

[0026] Figure 6 This is a third-angle spatial schematic diagram of the marking mechanism of the laser marking equipment for sealing gaskets of the present invention; (marking bracket removed).

[0027] Figure 7This is a spatial schematic diagram of the laser marking head and calibration mechanism of the sealing gasket laser marking equipment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Feeding hopper; 2. Vibratory feeder; 201. Vibratory feeder hopper; 202. Spiral track; 203. First barcode reader; 204. First air pipe; 3. Guide groove; 301. Second barcode reader; 4. Transmission mechanism; 401. Transmission base frame; 402. Bearing end cover; 403. Guide track; 5. Marking mechanism; 501. Marking bracket; 502. Adapter plate; 503. Rotary seat; 504. Control panel; 505. Marking base plate; 506. Marking head lifting plate; 507. Screw; 508. Handwheel; 509. Linear... 510. Bearing; 511. Guide rod; 512. Laser marking head; 513. Marking head controller; 6. Sensor; 7. Smoke and dust collection assembly; 701. Top frame; 702. Bottom frame; 703. Outer glass cover; 704. Fixed connecting block; 705. Smoke extraction port; 8. Position adjustment rod; 901. Third barcode reader; 902. Verification base; 903. Baffle; 904. Defective product collection box; 905. Second air pipe; 10. Control assembly; 11. Smoke extractor; 12. Water chiller; 13. Electrical cabinet; 14. Sealing gasket. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0032] This invention discloses a laser marking device for sealing gaskets. For ease of description, as follows: Figure 1 As shown, the transmission direction of transmission mechanism 4 is defined as the left-right direction, the height direction of transmission mechanism 4 is defined as the up-down direction, and the width direction of transmission mechanism 4 is defined as the front-back direction. Therefore, in Figure 1A spatial parameter coordinate system is established, in which the X direction is the left-right direction, the Y direction is the front-back direction, and the Z direction is the up-down direction.

[0033] like Figures 1-7 As shown, the present invention provides a laser marking device for sealing gaskets, including a feeding mechanism, a transmission mechanism 4, a marking mechanism 5, and a control component 10. The feeding mechanism includes a feeding bin 1, a vibrating plate 2, and a guide groove 3. The feeding bin 1 is located above the vibrating plate 2 and is used to feed the sealing gasket 14 into the vibrating plate 2. The vibrating plate 2 includes a vibrating plate hopper 201 and a spiral track 202 disposed within the vibrating plate hopper 201. The spiral track 202 is spirally arranged towards the opening direction of the vibrating plate hopper 201. A first barcode reader 203 and a first air pipe 204 are installed through the wall of the vibratory feeder hopper 201 on the side of the spiral track 202. The control sources of the first barcode reader 203 and the first air pipe 204 are both connected to the control component 10. The left end of the guide groove 3 is connected to the outlet of the vibratory feeder hopper 201, and the right end of the guide groove 3 is connected to the end of the transmission mechanism 4. The sealing gasket 14 flows into the transmission mechanism 4 through the guide groove 3. A second barcode reader 301 is installed on the lower side of the guide groove 3. The second barcode reader 301 is connected to the control component 10.

[0034] The sealing gasket laser marking equipment of the present invention includes a spiral track 202 set in the vibratory feeder hopper 201, and a first code reader 203 and a first air pipe 204 are installed through the vibratory feeder hopper 201 on the side of the spiral track 202. The sealing gasket 14 enters the spiral track 202 under the action of the vibratory feeder 2. The first code reader 203 detects the end face of the sealing gasket 14 facing the first code reader 203. When a marking code is detected, the sealing gasket 14 is blown back into the vibratory feeder 2 through the first air pipe 204, ensuring that the end face of the sealing gasket 14 facing the first code reader 203 is blank (i.e., the top surface of the sealing gasket 14 in the guide groove 3 is blank). After the sealing gasket 14 enters the guide groove 3 from the spiral track 202, the second barcode reader 301 detects the bottom surface of the sealing gasket 14. When a blank is detected, the second barcode reader 301 sends information to the control component 10, and the control component 10 calls the corresponding program to control the marking mechanism 5 to perform marking. When a marking code is detected, the second barcode reader 301 sends information to the control component 10, and the control component 10 calls the corresponding program to control the marking mechanism 5 to perform marking, so that the marking codes on the top and bottom surfaces of the sealing gasket 14 are the same, related, or exist independently. This solves the problems of low automation of marking equipment, cumbersome double-sided marking operation of the sealing gasket 14, and inability to correlate the marking content on the front and back sides in the prior art.

[0035] Preferred, such as Figure 4 , Figure 7As shown, the laser marking equipment for sealing gaskets also includes a verification mechanism and a defective product separation mechanism. The control component 10 is communicatively connected to the transmission mechanism 4, the marking mechanism 5, the verification mechanism, and the defective product separation mechanism. In this embodiment, the verification mechanism is used to detect the quality of the marking code on the top surface of the sealing gasket 14, and the defective product separation mechanism is used to separate the defective product from the good product when the verification mechanism detects a defective product.

[0036] Preferred, such as Figure 1 , Figure 3 As shown, the transmission mechanism 4 includes a transmission base 401, a transmission drive motor, a drive shaft, a driven shaft, a transmission belt, and a guide rail 403. The drive shaft and the driven shaft are located at the left and right ends of the transmission base 401, and bearing end caps 402 are provided at both the front and rear axial ends of the drive shaft and the driven shaft. The transmission drive motor is connected to the drive shaft for transmission, and the drive shaft is connected to the driven shaft through the transmission belt. The guide rail 403 is located on the top surface of the bearing end caps 402 and the transmission base 401 to guide the movement of the sealing gasket 14 on the transmission belt. Furthermore, in this embodiment, the guide rail 403 is composed of two L-shaped plates. The two L-shaped plates are fixed to the bearing end cover 402 in a front-to-back direction. The left ends of the vertical plates of the two L-shaped plates are fixed to the bearing end cover 402 of the driven shaft, and the right ends of the vertical plates of the two L-shaped plates are fixed to the bearing end cover 402 of the drive shaft. The horizontal surfaces of the two L-shaped plates are connected to the front and rear sides of the transmission base frame 401 respectively through connectors to improve the support strength of the L-shaped plates. There is a certain gap between the vertical plates of the two L-shaped plates, which is slightly larger than the diameter of the sealing gasket 14, to achieve the guiding function of the sealing gasket 14.

[0037] Preferred, such as Figures 4-6 As shown, the marking mechanism 5 includes a marking bracket 501, a laser marking head 511, and a marking head controller 512. The transmission mechanism 4 extends through the marking bracket 501 in a left-right direction. The laser marking head 511 marks the sealing gasket 14 in the guide rail 403 of the transmission mechanism 4. The marking head controller 512 is communicatively connected to the control component 10 and the laser marking head 511. Further, as... Figure 6 As shown, the marking head controller 512 is located above the laser marking head 511, and the control component 10 is located above the marking head controller 512.

[0038] Preferred, such as Figure 5 , Figure 6As shown, the marking bracket 501 internally houses a marking base plate 505 and a marking head lifting plate 506. Both the marking base plate 505 and the marking head lifting plate 506 are perforated vertically by screws 507 and several guide rods 510. The guide rods 510 are connected to the marking base plate 505 via linear bearings 509. The screws 507 are threadedly connected to the marking head lifting plate 506. A handwheel 508 is also fixedly mounted on the screws 507. The laser marking head 511 is mounted on the marking head lifting plate 506. In this embodiment, the marking base plate 505 is fastened to the inside of the marking bracket 501 with screws. There are four guide rods 510 and one screw 507, which is fixed at the intersection of the diagonals of the four guide rods 510. The marking head lifting plate 506 has four through holes and a threaded hole at its center. A screw 507 engages with the threaded hole, and the four through holes are respectively fitted with four guide rods 510. When the handwheel 508 is rotated, the screw 507 rotates, and the marking head lifting plate 506 rises and falls under the action of friction, driving the laser marking head 511 to rise and fall. The four guide rods 510 guide the laser marking head 511 during its rise and fall. In this embodiment, the handwheel 508 drives the laser marking head 511 to perform coarse focusing adjustment. Once the height of the laser marking head 511 is basically suitable, fine focusing is performed through the lens of the laser marking head 511 to ensure that the laser emitted by the laser marking head 511 has appropriate energy, thus achieving marking on the sealing gasket 14.

[0039] Furthermore, such as Figure 4 , Figure 7 As shown, a sensor 6 is also provided on the transmission base 401 between the guide groove 3 and the laser marking head 511 to detect whether the sealing gasket 14 has moved to the marking area of ​​the laser marking head 511. The sensor 6 is communicatively connected to the control component 10.

[0040] Preferred, such as Figure 4 , Figure 6As shown, a dust collection assembly 7 (not labeled in the figure) is also provided on the lower side of the laser marking head 511. The dust collection assembly 7 includes a fixing connecting block 704, a top frame 701, a bottom frame 702, and an outer peripheral glass cover 703. The fixing connecting block 704 is vertically fixed to the front side of the transmission base 401. The top frame 701 and the bottom frame 702 are both set on the fixing connecting block 704, with the top frame 701 located above the bottom frame 702. The outer peripheral glass cover 703 is located between the top frame 701 and the bottom frame 702. The top frame 701 is located on the outer periphery of the laser marking head 511, and a smoke extraction port 705 is opened on the left side wall of the top frame 701. The smoke extraction port 705 is connected to an external smoke treatment assembly. In this embodiment, the fixing connecting block 704 is fastened to the front side of the transmission base 401 with screws, providing support for the top frame 701 and the bottom frame 702. The front sides of the top frame 701 and the bottom frame 702 are fitted with fixed sleeves, which are sleeved on the outer periphery of the fixed connecting block 704, thereby connecting the top frame 701 and the bottom frame 702 to the fixed connecting block 704. Furthermore, slots are formed on the bottom surface of the top frame 701 and the top surface of the bottom frame 702, and outer peripheral glass covers 703 are disposed in the slots of the top frame 701 and the bottom frame 702 to prevent the smoke and dust generated by laser marking from escaping. In this embodiment, there are four outer peripheral glass covers 703, and the top frame 701 and the bottom frame 702 are quadrilateral in shape.

[0041] Furthermore, such as Figure 1 , Figure 4 , Figure 5 As shown, an electrical cabinet 13 is also provided on the outer side of the left side of the marking bracket 501. The electrical cabinet 13 contains several electrical components, which are used to enable the sealing gasket laser marking equipment to be powered on and to communicate.

[0042] Preferred, such as Figure 4 As shown, a converter plate 502 is provided on the top of the marking bracket 501, a rotating seat 503 is provided on the converter plate 502, and a control panel 504 is provided on the rotating seat 503. The control panel 504 includes a display screen, a keyboard, and function keys. The control component 10 and the marking head controller 512 are all communicatively connected to the display screen, keyboard, and function keys. The operator inputs the program to be called by the marking mechanism 5 through the keyboard and function keys, and the called program is stored in the marking head controller 512.

[0043] Preferred, such as Figure 7As shown, the verification mechanism includes a third barcode reader 901, a verification base 902, and a light source. The third barcode reader 901 is located above the transmission mechanism 4 and is used to verify the marking code on the top surface of the sealing gasket 14 in the transmission mechanism 4. The verification base 902 is located on the transmission mechanism 4 below the third barcode reader 901, and the verification base 902 has through holes running through its top and bottom. The light source is located on the verification base 902. The third barcode reader 901 is communicatively connected to the control component 10. In this embodiment, the third barcode reader 901 is located on the front side of the transmission base 401. A position adjustment rod 8 is provided between the third barcode reader 901 and the transmission base 401. The position adjustment rod 8 includes a vertical rod and a horizontal rod. The vertical rod is vertically fixed to the front side of the transmission base 401 by screws, and the horizontal rod can be locked onto the vertical rod to adjust the height position of the third barcode reader 901, facilitating the focusing of the third barcode reader 901. The verification base 902 is circular, and a through hole is provided in the center of the verification base 902. The light source is set on the outer circumference of the verification base 902 to provide illumination, increase the contrast between the marking code and the blank area of ​​the sealing gasket 14, and facilitate better recognition by the third code reader 901.

[0044] Preferred, such as Figure 7 As shown, the defective product separation mechanism includes a second air pipe 905, a solenoid valve for controlling the opening and closing of the air passage in the second air pipe 905, a baffle 903, and a defective product collection box 904. The second air pipe 905 penetrates the front side wall of the calibration base 902. The baffle 903 is positioned in the direction of air ejection in the second air pipe 905, and the defective product collection box 904 is positioned below the baffle 903. The solenoid valve is communicatively connected to the control component 10. In this embodiment, the baffle 903 is shaped like a U-shape with its opening facing forward. The top of the baffle 903 has a certain curvature to prevent the sealing gasket 14 from flying around under the blowing of the second air pipe 905.

[0045] Preferably, in this embodiment, the first barcode reader 203, the second barcode reader 301, and the third barcode reader 901 are all industrial cameras. The control source for the first air pipe 204 is also a solenoid valve. The second barcode reader 301 is located on the lower side of the guide groove 3 and is mounted on the transmission base 401 via a position adjustment rod 8. This position adjustment rod 8 has the same structure and function as the position adjustment rod 8 that fixes the third barcode reader 901.

[0046] To achieve the above or other objectives, the present invention also discloses a method for using a laser marking device for sealing gaskets, wherein the steps of using the aforementioned laser marking device for sealing gaskets are as follows:

[0047] A1: First, the sealing gasket 14 to be marked is put into the vibratory feeder 2 through the feeding hopper 1. The vibratory feeder 2 works, and the sealing gasket 14 enters the spiral track 202 and rises along the spiral track 202 as the vibratory feeder 2 vibrates.

[0048] A2: The first barcode reader 203 on the side of the spiral track 202 detects the end face of the sealing gasket 14 facing the first barcode reader 203. When a marking code is detected, the first barcode reader 203 feeds back information to the control component 10. The control component 10 opens the solenoid valve controlling the first air pipe 204, and air is introduced into the first air pipe 204, spraying the sealing gasket 14 back into the vibrating plate hopper 201. When the first barcode reader 203 does not detect a marking code, the sealing gasket 14 enters the guide groove 3 along the spiral track 202. At this time, the end face of the sealing gasket 14 facing the first barcode reader 203 is facing upward, that is, the blank surface detected by the first barcode reader 203 is the marking surface.

[0049] A3: The sealing gasket 14 on the spiral track 202 enters the guide groove 3 and enters the conveyor belt along the guide groove 3; when the sealing gasket 14 moves in the guide groove 3, the second code reader 301 below the guide groove 3 detects the bottom surface of the sealing gasket 14 and feeds back information to the control component 10 according to the detection result.

[0050] A3.1: When the second barcode reader 301 does not detect the marking code, that is, both sides of the sealing gasket 14 are blank, the second barcode reader 301 feeds back the information of the blank side to the control component 10. The control component 10 calls the corresponding program according to the information fed back by the second barcode reader 301 and controls the laser marking head 511 to perform the corresponding marking.

[0051] A3.2: When the second barcode reader 301 detects the marking code, i.e., the top surface of the sealing gasket 14 is blank and the bottom surface is non-blank, the second barcode reader 301 feeds back the information of the bottom surface of the sealing gasket 14 to the control component 10. The control component 10 calls the corresponding program according to the information fed back by the second barcode reader 301. This information is stored in the marking head controller 512, and the marking is performed sequentially according to the entry order of the sealing gasket 14. The marking head controller 512 controls the laser marking head 511 to perform the corresponding marking. The marking content can be the same as the marking content on the bottom surface of the sealing gasket 14, or it can be used for correlation and matching with the marking content on the bottom surface of the sealing gasket 14, or it can be independent content.

[0052] A4: The conveyor belt drives the sealing gasket 14 to move. When the sealing gasket 14 moves into the sensing range of the sensor 6, the sensor 6 sends information to the control component 10, and the control component 10 controls the laser marking head 511 to work. When the sealing gasket 14 enters the marking area of ​​the laser marking head 511 (i.e., the coverage area of ​​the outer peripheral glass cover 703), the laser marking head 511 emits a laser to mark the top surface of the sealing gasket 14. When the sealing gasket 14 moves to the right and is about to leave the outer peripheral glass cover 703, the marking is completed.

[0053] A5: After the laser marking head 511 marks the top surface of the sealing gasket 14, when the sealing gasket 14 moves to the right into the through hole of the verification base 902, the third code reader 901 detects and identifies the marking code on the top surface of the sealing gasket 14 and feeds back the detection result to the control component 10.

[0054] A5.1: When the third barcode reader 901 detects that the marking code on the top surface of the sealing gasket 14 is different from the expected marking code, it will be judged as NG and the next step will be executed directly.

[0055] A5.2: When the third barcode reader 901 detects that the expected barcode on the top surface of the sealing gasket 14 is the same, it will be determined as OK and the next step will be skipped directly.

[0056] A6: Distinguishing defective products. When the third barcode reader 901 feeds back information to the control component 10, the control component 10 compares the feedback information with the expected marking code parameters. When it is determined to be NG, the control component 10 controls the solenoid valve on the second air pipe 905 to work, and air is introduced into the second air pipe 905, blowing the sealing gasket 14 toward the baffle 903. The sealing gasket 14 collides with the baffle 903 and falls into the defective product collection box 904 under the action of gravity.

[0057] A7: The sealing gaskets 14 that are deemed qualified in step A5.2 fall into the good product collection box (not shown) along the conveyor belt for collection.

[0058] Preferably, when the sealing gasket 14 on the guide groove 3 moves toward the transmission belt in step A3, a limiting component can also be provided between the guide groove 3 and the transmission belt to adjust the distance between adjacent sealing gaskets 14 and prevent two sealing gaskets 14 from entering the marking area at the same time (the laser marking head 511 only marks one sealing gasket 14). This limiting component is existing technology.

[0059] Preferably, the guide groove 3 in step A3 is hollow or has a through hole, for the second code reader 301 to collect the marking code information on the bottom surface of the sealing gasket 14;

[0060] Preferably, in step A3, when the second barcode reader 301 collects the marking code information on the bottom surface of the sealing gasket 14, it will also mark the sealing gasket 14 and feed it back to the control component 10 (the mark of the sealing gasket 14 matches the marking program of the sealing gasket 14). The control component 10 stores the mark and performs marking sequentially according to the reading order of the second barcode reader 301.

[0061] Preferably, the transmission mechanism 4 in step A3 is a flight transmission mechanism, which is a prior art technology.

[0062] Preferably, in step A4, the smoke generated by the laser marking head 511 during the marking process is collected through the smoke extraction port 705. The bottom of the marking bracket 501 is also equipped with a smoke extractor 11, which is connected to the smoke extraction port 705 through a pipe.

[0063] Preferably, in step A4, during the marking process, in order to avoid the laser marking head 511 from getting too hot, the laser marking head 511 is also connected to a water chiller 12 to reduce the temperature of the laser marking head 511.

[0064] Preferably, the situations that are judged as NG in step A5.1 include blurry handwriting, incorrect handwriting, distorted handwriting, and problems such as damage or bulging of the coating on the surface of the sealing gasket 14.

[0065] Preferably, in step A7, before the qualified sealing gasket 14 falls into the good product collection box, a counter is also provided on the transfer base 401 to record the number of good products.

[0066] Preferably, in the above steps, the focus of the first barcode reader 203, the second barcode reader 301, and the third barcode reader 901 is adjusted before use, and the height of the laser marking head 511 is also adjusted. The second barcode reader 301 is also provided with the same device as the verification base 902 on its upper side to improve the contrast of the second barcode reader 301.

[0067] In this embodiment, when the first barcode reader 203 detects a foreign object on the corresponding end face, it will directly blow the sealing gasket 14 back into the vibrating plate 2. When the second barcode reader 301 detects a foreign object on the bottom surface of the corresponding sealing gasket 14 (except for single-sided marking errors, where the other side is reused for marking, which can be changed through the program), it will also send information to the control component 10 and directly determine it as NG.

[0068] Furthermore, in this embodiment, when placing the sealing gasket 14 into the vibratory feeder 2, both sides are generally blank and they are placed together, and those marked on one side are placed together. That is, there will generally be no mixed marking, which ensures the stability of the program in the control component 10.

[0069] The present invention relates to a laser marking device and method for sealing gaskets, comprising a first barcode reader 203, a second barcode reader 301, and a third barcode reader 901, all of which are communicatively connected to a control component 10. The first barcode reader 203 prevents the marked side of the sealing gasket 14 from being on the top surface, thus avoiding repeated marking. The second barcode reader 301 reads information from the bottom surface of the sealing gasket 14, thereby communicating with the control component 10 to achieve marking according to a specific program. The third barcode reader 901 reads the information on the top surface of the sealing gasket 14, checks whether the marking information just marked meets the expected requirements, and feeds back the information to the control component 10 to separate defective products. It can mark both one side and both sides of the sealing gasket 14, and can make the marking content on the front and back sides of the sealing gasket 14 interconnected, while also making the marking content on the front and back sides of the sealing gasket 14 independent. It solves the problems of low automation of marking equipment, cumbersome operation of double-sided marking of sealing gasket 14, and inability to associate the marking content on the front and back sides in the existing technology.

[0070] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0071] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for laser marking a gasket, employing a gasket laser marking device, the gasket laser marking device comprising a feeding mechanism, a transmission mechanism (4), a marking mechanism (5), and a control component (10), characterized in that: The feeding mechanism includes a feeding bin (1), a vibrating plate (2), and a guide groove (3). The feeding bin (1) is located on the upper side of the vibrating plate (2) and is used to feed the sealing gasket (14) into the vibrating plate (2). The vibrating plate (2) includes a vibrating plate hopper (201) and a spiral track (202) disposed in the vibrating plate hopper (201). The spiral track (202) is spirally arranged towards the opening of the vibrating plate hopper (201). A through-hole is provided on the vibrating plate hopper (201) on the side of the spiral track (202). The first barcode reader (203) and the first air pipe (204) are connected to the control component (10) via communication. One end of the guide groove (3) is connected to the outlet of the vibrating hopper (201), and the other end is connected to the end of the transmission mechanism (4). The sealing gasket (14) flows into the transmission mechanism (4) through the guide groove (3). A second barcode reader (301) is provided on the lower side of the guide groove (3). The second barcode reader (301) is connected to the control component (10) via communication. When the first barcode reader (203) detects a code on the top surface of the sealing gasket (14), the first barcode reader (203) sends feedback information to the control component (10), and the control component (10) opens the solenoid valve controlling the first air pipe (204), allowing air to enter the first air pipe (204) and spraying the sealing gasket (14) back into the vibrating plate hopper (201); when the first barcode reader (203) does not detect a code on the top surface, the sealing gasket (14) enters the guide groove (3) along the spiral track (202); When the second barcode reader (301) detects a blank bottom surface of the sealing gasket (14), the second barcode reader (301) sends information to the control component (10), and the control component (10) calls the corresponding program to control the marking mechanism (5) to perform marking; when the second barcode reader (301) detects a marking code on the bottom surface of the sealing gasket (14), the second barcode reader (301) sends information to the control component (10), and the control component (10) calls the corresponding program to control the marking mechanism (5) to perform marking, so that the marking codes on the top and bottom surfaces of the sealing gasket (14) are the same, related, matched, or exist independently; The marking mechanism (5) includes a laser marking head (511), which is used to mark the sealing gaskets (14) on the transmission mechanism (4); a limiting component is also provided between the guide groove (3) and the transmission mechanism (4), which is used to adjust the distance between adjacent sealing gaskets (14) to prevent two sealing gaskets (14) from entering the marking area of ​​the laser marking head (511) at the same time, so that the laser marking head (511) marks only one sealing gasket (14) at a time; the guide groove (3) adopts a hollow structure, or A through hole is provided on the guide groove (3) for the second barcode reader (301) to collect the marking code information on the bottom surface of the sealing gasket (14); when the second barcode reader (301) collects the marking code information on the bottom surface of the sealing gasket (14), it marks the sealing gasket (14) and feeds it back to the control component (10). The mark of the sealing gasket (14) matches the marking program of the sealing gasket (14). The control component (10) stores the mark and controls the marking mechanism (5) to mark in sequence according to the reading order of the second barcode reader (301).

2. The method for laser marking of sealing gaskets according to claim 1, characterized in that: It also includes a verification mechanism and a defective product separation mechanism. The control component (10) is communicatively connected to the transmission mechanism (4), the marking mechanism (5), the verification mechanism, and the defective product separation mechanism.

3. The method for laser marking of sealing gaskets according to claim 2, characterized in that: The transmission mechanism (4) includes a transmission base (401), a transmission drive motor, a drive shaft, a driven shaft, a transmission belt, and a guide rail (403). The drive shaft and the driven shaft are located at both ends of the transmission base (401), and bearing end caps (402) are provided at both axial ends of the drive shaft and the driven shaft. The transmission drive motor is connected to the drive shaft, and the drive shaft is connected to the driven shaft through the transmission belt. The guide rail (403) is located on the top surface of the bearing end caps (402) and the transmission base (401) to guide the movement of the sealing gasket (14) on the transmission belt.

4. The method for laser marking of sealing gaskets according to claim 2, characterized in that: The marking mechanism (5) includes a marking bracket (501) and a marking head controller (512), and the transmission mechanism (4) passes through the marking bracket (501); the marking head controller (512) is communicatively connected to the control component (10) and the laser marking head (511).

5. The method for laser marking sealing gaskets according to claim 4, characterized in that: The marking bracket (501) is internally provided with a marking base plate (505) and a marking head lifting plate (506). Both the marking base plate (505) and the marking head lifting plate (506) are provided with a screw (507) and several guide rods (510). The guide rods (510) are connected to the marking base plate (505) through a linear bearing (509). The screw (507) is connected to the marking head lifting plate (506) through a thread. A handwheel (508) is also fixedly provided on the screw (507). The laser marking head (511) is provided on the marking head lifting plate (506).

6. The method for laser marking sealing gaskets according to claim 4, characterized in that: A dust collection assembly (7) is also provided on the lower side of the laser marking head (511). The dust collection assembly (7) includes a fixed connecting block (704), a top frame (701), a bottom frame (702), and an outer peripheral glass cover (703). The fixed connecting block (704) is vertically fixed on the transmission mechanism (4). The top frame (701) and the bottom frame (702) are both provided on the fixed connecting block (704), and the top frame (701) is located above the bottom frame (702). The outer peripheral glass cover (703) is provided between the top frame (701) and the bottom frame (702). The top frame (701) is provided on the outer periphery of the laser marking head (511), and a smoke extraction port (705) is provided on the top frame (701). The smoke extraction port (705) is connected to the external flue gas treatment assembly.

7. The method for laser marking of sealing gaskets according to claim 4, characterized in that: The top of the marking bracket (501) is provided with an adapter plate (502), the adapter plate (502) is provided with a rotating seat (503), and the rotating seat (503) is provided with a control panel (504); the control panel (504) includes a display screen, a keyboard, and function keys, and the control component (10) is communicatively connected to the display screen, the keyboard, and the function keys.

8. The method for laser marking of sealing gaskets according to claim 2, characterized in that: The verification mechanism includes a third barcode reader (901), a verification base (902), and a light source. The third barcode reader (901) is located on the upper side of the transmission mechanism (4) and is used to verify the marking code of the sealing gasket (14) in the transmission mechanism (4). The verification base (902) is located on the transmission mechanism (4) below the third barcode reader (901) and has through holes running through its top and bottom. The light source is located on the verification base (902). The third barcode reader (901) is communicatively connected to the control component (10).

9. The method for laser marking of sealing gaskets according to claim 8, characterized in that: The defective product separation mechanism includes a second air pipe (905), a solenoid valve for controlling the opening and closing of the air passage in the second air pipe (905), a baffle (903), and a defective product collection box (904). The second air pipe (905) passes through the side wall of the calibration base (902). The baffle (903) is located in the direction of air ejection in the second air pipe (905). The defective product collection box (904) is located below the baffle (903). The solenoid valve is communicatively connected to the control component (10).

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