A laser marking machine for food production and packaging

Abstract

The invention discloses a laser marking machine for food production packaging, relates to the technical field of laser marking of packaging bags, comprises a conveyor and a laser marking head, and also comprises: a bracket; a displacement mechanism, used for driving the laser marking head to move; a sealing mechanism, used for sealing the packaging bag during the marking process; a fixed-point smoke removal mechanism, used for fixed-point cleaning of smoke generated by multi-position marking of the packaging bag in the sealing mechanism; the laser marking machine for food production packaging, by sealing the top space of the packaging bag, when the laser marking head performs multi-position marking on the packaging bag, smoke generated by laser marking inside the sealing cover will not be dispersed, thus solving the problem in the prior art that smoke can only be collected after it diffuses, resulting in incomplete smoke collection, and eliminating the problem in the prior art that a thinner and lighter packaging bag is easily offset or folded on the conveyor and difficult to mark normally by arranging an exhaust structure on one side of the packaging bag.

Description

Technical Field

[0001] The invention relates to the technical field of laser marking of packaging bags, and in particular to a laser marking machine for food production packaging. Background Art

[0002] Laser processing uses the energy of light to reach a high energy density at the focal point after being focused by a lens, and relies on the photothermal effect for processing. Laser processing does not require tools, has a fast processing speed, and has small surface deformation. It can process a variety of materials, including food packaging bags, which can also be marked on the outside using a low-power laser machine.

[0003] The existing laser marking machine will generate a lot of smoke when marking the packaging bags, which has a serious impact on the working environment. In the prior art, the smoke is extracted by setting an exhaust structure on the conveyor. However, when the smoke is extracted, the smoke has already diffused, and it is difficult to completely and directionally extract the generated smoke, so there will be smoke remaining in the working environment. Therefore, a laser marking machine that can seal the packaging bags and exhaust smoke at a fixed point is needed. Summary of the invention

[0004] The purpose of the present invention is to provide a laser marking machine for food production and packaging, so as to solve the problem that the laser marking machine in the prior art will generate a lot of smoke when marking the packaging bag, which has a serious impact on the working environment. In the prior art, the smoke generated is extracted by arranging an exhaust structure on the conveyor, but when the smoke is extracted, the smoke has already diffused, and it is difficult to completely and directionally extract the generated smoke, so there will be a problem of smoke remaining in the working environment.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a laser marking machine for food production and packaging, comprising a conveyor and a laser marking head, and also comprising:

[0006] a bracket, which is mounted on top of the conveyor;

[0007] A displacement mechanism, which is mounted on the bracket and is used to drive the laser marking head to move;

[0008] A closing mechanism, which is arranged above the conveyor and is used to close the packaging bag during the marking process;

[0009] A fixed-point smoke removal mechanism, which is connected to the closing mechanism and is used to perform fixed-point cleaning of smoke generated by marking multiple positions of packaging bags in the closing mechanism;

[0010] The flattening and separating integrated mechanism is connected to the closing mechanism and is used to automatically flatten the packaging bag before closing the packaging bag, and is also used to separate the packaging bag from the closing mechanism after marking is completed;

[0011] The sealing mechanism comprises two cylinders fixedly connected to the inner wall of the top of the bracket and sealing covers installed at the extended ends of the two cylinders;

[0012] The flattening and separating integrated mechanism is provided with two and is respectively installed on the outer walls on both sides of the sealing cover; the flattening and separating integrated mechanism comprises a plurality of sleeves installed on the outer wall of one side of the sealing cover and a fixing strip fixedly connected to the inner wall of the bracket.

[0013] Further, the displacement mechanism includes a screw rod rotatably connected to the inner side wall of the bracket and a motor installed on the outer wall of one side of the bracket;

[0014] The output end of the motor is fixedly connected to one end of the screw rod;

[0015] The outside of the screw rod is threaded with a connecting shell, the laser marking head is slidably connected to the inside of the connecting shell, and the top of the connecting shell is slidably connected to the inner wall of the top of the bracket.

[0016] Furthermore, a first slide groove is provided on the top of the sealing cover, a first support block is slidably connected inside the first slide groove, and the laser marking head is installed inside the first support block;

[0017] Two first telescopic curtains are also installed inside the first sliding groove, and opposite ends of the two first telescopic curtains are respectively fixedly connected to two ends of the first supporting block.

[0018] Furthermore, the fixed-point smoke removal mechanism includes second slide grooves respectively provided on the outer walls of both sides of the sealing cover and an exhaust pipe installed at one end of the sealing cover;

[0019] A second support block is slidably connected to the inner walls of the two second slide grooves, and an air intake pipe is installed on the second support block. The air intake end of the air intake pipe is arranged upward.

[0020] Furthermore, two second telescopic curtains are installed inside the second slide groove, and opposite ends of the two second telescopic curtains are fixedly connected to two ends of the second support block respectively.

[0021] Furthermore, a linkage block is fixedly connected to the top of the second support block, and the other end of the linkage block is connected to the laser marking head. When the laser marking head moves, the second support block and the air intake pipe are driven to move synchronously through the linkage block.

[0022] Furthermore, a piston is installed inside the sleeve, a fixing rod is fixed to the top of the piston, the top of the fixing rod is fixed to the bottom of the fixing bar, and the distance between the lower edge of the second support block and the upper edge of the fixing rod is greater than the distance that the second support block needs to move downward;

[0023] A conduit is installed at the bottom of the sleeve, and a telescopic rubber ring is installed at the other end of the conduit;

[0024] A plurality of hidden grooves are provided at the bottom of the sealing cover, and the telescopic rubber ring is located inside the hidden grooves.

[0025] Compared with the prior art, the laser marking machine for food production and packaging provided by the present invention has the following beneficial effects:

[0026] By driving the sealing cover to press down on the top of the packaging bag, the space on the top of the packaging bag is sealed. When the displacement mechanism drives the laser marking head to move, the first support block slides synchronously along the inner wall of the first slide slot, thereby driving the two first telescopic curtains to telescope synchronously, and the first slide slot is always sealed. The smoke generated by the laser marking inside the sealing cover will not be dispersed, which solves the problem of incomplete smoke collection in the prior art that the smoke can only be collected after it diffuses, and solves the problem of the prior art that the thinner and lighter packaging bags are easily offset or folded on the conveyor and difficult to mark normally by setting an exhaust structure on one side of the packaging bag;

[0027] When the laser marking head moves to mark multiple positions of the packaging bag, the air intake pipe is driven to move synchronously with the laser marking head, and then when the inside of the sealing cover is evacuated through the exhaust pipe, the gas enters the sealing cover from both sides of the laser marking head, so that the smoke generated by the laser marking head at the current position can be accurately and quickly taken away, preventing the smoke from being discharged in time and accumulating inside the sealing cover to affect the marking effect of the laser marking head;

[0028] When the sealing cover moves down, the packaging bag can be quickly tightened by simultaneously pumping air into multiple retractable rubber rings to keep the packaging bag flat, thereby ensuring the clarity of subsequent laser marking and avoiding the problem of marking font separation;

[0029] After the packaging bag is marked, the sealing cover is driven upward to discharge the gas inside the sleeve through the telescopic rubber ring, thereby separating the packaging bag from the bottom of the sealing cover, avoiding the problem of the sealing cover sticking to the packaging bag after pressing down on the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the displacement mechanism, the sealing mechanism, the fixed-point smoke removal mechanism and the flattening and separating integrated mechanism of the present invention from a first-view perspective;

[0033] Figure 3 It is a schematic structural diagram of the displacement mechanism, the sealing mechanism, the fixed-point smoke removal mechanism and the flattening and separating integrated mechanism of the present invention from a second viewing angle;

[0034] Figure 4 It is a schematic diagram of the structure of the flattening and separating integrated mechanism of the present invention;

[0035] Figure 5 It is a schematic diagram of the internal structure of the sleeve of the present invention.

[0036] Description of reference numerals:

[0037] 1. Conveyor; 2. Laser marking head; 3. Bracket; 4. Screw; 5. Motor; 6. Connecting shell; 7. Cylinder; 8. Sealing cover; 9. First slide slot; 10. First support block; 11. First telescopic curtain; 12. Second slide slot; 13. Exhaust pipe; 14. Second support block; 15. Inlet pipe; 16. Second telescopic curtain; 17. Linkage block; 18. Sleeve; 19. Fixing strip; 20. Piston; 21. Fixing rod; 22. Conduit; 23. Telescopic rubber ring. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Example: See Figure 1 - Figure 5 A laser marking machine for food production packaging, comprising a conveyor 1 and a laser marking head 2. A paging machine can be arranged at one end of the conveyor 1 to guide the packaging bags to the conveyor 1 at equal distances, and cooperate with the conveyor 1 to transport the packaging bags at equal distances. It also includes:

[0040] The bracket 3 is installed on the top of the conveyor 1. A laser sensor is installed on the bracket 3. When the packaging bag moves to the bottom of the sealing cover 8, the conveyor 1 is controlled to stop running.

[0041] The displacement mechanism is installed on the bracket 3 and is used to drive the laser marking head 2 to move. The displacement mechanism includes a screw rod 4 rotatably connected to the inner wall of the bracket 3 and a motor 5 installed on the outer wall of one side of the bracket 3; the output end of the motor 5 is fixedly connected to one end of the screw rod 4; the outer part of the screw rod 4 is screwed with a connecting shell 6, the laser marking head 2 is slidably connected to the inside of the connecting shell 6, and the top of the connecting shell 6 is slidably connected to the inner wall of the top of the bracket 3;

[0042] By controlling the motor 5 to drive the screw rod 4 to rotate clockwise, the connecting shell 6 is driven to move forward, thereby driving the laser marking head 2 to move forward, and the laser marking head 2 is driven to move to the set position and then stop, so that multiple positions of the packaging bag can be marked respectively;

[0043] By controlling the motor 5 to drive the screw rod 4 to rotate counterclockwise, the connecting shell 6 is driven to move backward, thereby driving the laser marking head 2 to move backward, and driving the laser marking head 2 to move to the set position and then stop, so that multiple positions of the packaging bag can be marked separately.

[0044] The closing mechanism is arranged above the conveyor 1 and is used to close the packaging bag during the marking process. The closing mechanism includes two cylinders 7 fixedly connected to the inner wall of the top of the bracket 3 and a sealing cover 8 installed at the extended ends of the two cylinders 7; a first slide groove 9 is provided on the top of the sealing cover 8, a first support block 10 is slidably connected inside the first slide groove 9, and the laser marking head 2 is installed inside the first support block 10; two first telescopic curtains 11 are also installed inside the first slide groove 9, and the opposite ends of the two first telescopic curtains 11 are respectively fixedly connected to the two ends of the first support block 10;

[0045] When the packaging bag is conveyed to the bottom of the sealing cover 8, the conveyor 1 stops running, and the sealing cover 8 is driven to press down on the top of the packaging bag by controlling the cylinder 7 to seal the top space of the packaging bag. When the displacement mechanism drives the laser marking head 2 to move, the first support block 10 slides synchronously along the inner wall of the first slide groove 9, thereby driving the two first telescopic curtains 11 to extend and retract synchronously, and the first slide groove 9 is always sealed. The smoke generated by laser marking inside the sealing cover 8 will not dissipate, which solves the problem of incomplete smoke collection in the prior art that smoke can only be collected after it diffuses.

[0046] A fixed-point smoke removal mechanism, which is connected to the sealing mechanism, is used for fixed-point cleaning of smoke generated by multi-position marking of packaging bags in the sealing mechanism. The fixed-point smoke removal mechanism includes second slide grooves 12 respectively arranged on the outer walls of both sides of the sealing cover 8 and an exhaust pipe 13 installed at one end of the sealing cover 8. The exhaust pipe 13 is connected to the exhaust fan, and the exhaust end of the exhaust fan is connected to the air purification device to purify the exhausted smoke; second support blocks 14 are slidably connected to the inner walls of the two second slide grooves 12, and the second support block 14 is installed with an air intake pipe 15, and the air intake end of the air intake pipe 15 is arranged upward, and two second telescopic curtains 16 are installed inside the second slide groove 12, and the opposite ends of the two second telescopic curtains 16 are respectively fixedly connected to the two ends of the second support block 14, and a linkage block 17 is fixedly connected to the top of the second support block 14, and the other end of the linkage block 17 is connected to the laser marking head 2. When the laser marking head 2 moves, the linkage block 17 drives the second support block 14 and the air intake pipe 15 to move synchronously;

[0047] When the laser marking head 2 moves to mark multiple positions of the packaging bag, the linkage block 17 drives the second support block 14 to slide synchronously along the inner wall of the second slide groove 12, so that the air inlet pipe 15 moves synchronously with the laser marking head 2, and then when the inside of the sealing cover 8 is evacuated through the exhaust pipe 13, the gas enters the sealing cover 8 from both sides of the laser marking head 2, so that the smoke generated by the laser marking head 2 at the current position can be accurately and quickly taken away, and the problem of smoke being accumulated inside the sealing cover 8 due to untimely exhaust and affecting the marking effect of the laser marking head 2 can be prevented;

[0048] When the second support block 14 moves, it drives the second telescopic curtains 16 on both sides thereof to extend and retract synchronously, thereby always sealing the second slide groove 12 to prevent the smoke inside the sealing cover 8 from being discharged through the second slide groove 12 .

[0049] The flattening and separating integrated mechanism is connected with the closing mechanism and is used to automatically flatten the packaging bag before closing the packaging bag, and is also used to separate the packaging bag from the closing mechanism after marking is completed. There are two flattening and separating integrated mechanisms, which are respectively installed on the outer walls on both sides of the sealing cover 8; the flattening and separating integrated mechanism includes a plurality of sleeves 18 installed on the outer wall of one side of the sealing cover 8 and a fixing bar 19 fixedly connected to the inner wall of the bracket 3; a piston 20 is installed inside the sleeve 18, a fixing rod 21 is fixedly connected to the top of the piston 20, the top of the fixing rod 21 is fixedly connected to the bottom of the fixing bar 19, and the distance between the lower edge of the second support block 14 and the upper edge of the fixing rod 21 is greater than the distance that the second support block 14 needs to move downward; a conduit 22 is installed at the bottom of the sleeve 18, and a telescopic rubber ring 23 is installed at the other end of the conduit 22; a plurality of hidden grooves are provided at the bottom of the sealing cover 8, and the telescopic rubber ring 23 is located on the inner side of the hidden groove;

[0050] When the sealing cover 8 moves down, each telescopic rubber ring 23 first contacts the top of the packaging bag. As the sealing cover 8 continues to move down, the telescopic rubber ring 23 shrinks into the hidden groove and is tightly attached to the top of the packaging bag until the sealing cover 8 is pressed on the top of the packaging bag. At the same time, the sleeve 18 moves downward synchronously with the sealing cover 8. Since the fixing strip 19 and the fixing rod 21 are fixedly arranged, the piston 20 moves upward relative to the sleeve 18, thereby pumping air into the telescopic rubber ring 23 through the conduit 22. By pumping air into multiple telescopic rubber rings 23 at the same time, the packaging bag can be quickly tightened to keep the packaging bag flat, thereby ensuring the clarity of subsequent laser marking and avoiding the problem of marking font separation.

[0051] After the packaging bag is marked, the sealing cover 8 is driven to move upward, and the sleeve 18 moves upward accordingly. The piston 20 moves downward relative to the sleeve 18, and the gas inside the sleeve 18 is discharged through the conduit 22 and the telescopic rubber ring 23, so that the packaging bag is separated from the bottom of the sealing cover 8, avoiding the problem of the sealing cover 8 sticking to the packaging bag after pressing down on the packaging bag. Finally, the conveyor 1 is started to drive the marked packaging bag to continue to move.

[0052] Working principle: When in use, the packaging bags are transported equidistantly by the conveyor 1. When the packaging bags are transported to the bottom of the sealing cover 8, the conveyor 1 stops running, and the sealing cover 8 is driven to press down on the top of the packaging bag by controlling the cylinder 7 to seal the top space of the packaging bag. When the sealing cover 8 moves down, each telescopic rubber ring 23 first abuts against the top of the packaging bag. As the sealing cover 8 continues to move down, the telescopic rubber ring 23 shrinks into the hidden groove and fits tightly against the top of the packaging bag until the sealing cover 8 is pressed on the top of the packaging bag. At the same time, the sleeve 18 moves downward synchronously with the sealing cover 8. Due to the fixing strip 19 and the fixing The fixed rod 21 is fixedly arranged, so the piston 20 will move upward relative to the sleeve 18, thereby pumping air into the telescopic rubber ring 23 through the conduit 22. Pumping air into multiple telescopic rubber rings 23 at the same time can quickly tighten the packaging bag to keep the packaging bag flat, thereby ensuring the clarity of subsequent laser marking and avoiding the problem of separation of marking fonts. By controlling the motor 5 to drive the screw rod 4 to rotate, the laser marking head 2 can be driven to move back and forth to mark multiple positions of the packaging bag. When the laser marking head 2 moves, the first support block 10 slides synchronously along the inner wall of the first slide groove 9, thereby driving the two first telescopic The curtain 11 is synchronously extended and retracted to always seal the first slide groove 9, and the smoke generated by the laser marking inside the sealing cover 8 will not be dispersed, which solves the problem of incomplete smoke collection in the prior art that the smoke can only be collected after it diffuses. When the laser marking head 2 moves to mark multiple positions of the packaging bag, the second support block 14 is driven by the linkage block 17 to slide synchronously along the inner wall of the second slide groove 12, so that the air inlet pipe 15 moves synchronously with the laser marking head 2, and then when the inside of the sealing cover 8 is evacuated through the exhaust pipe 13, the gas enters the inside of the sealing cover 8 from both sides of the laser marking head 2, thereby It can accurately and quickly take away the smoke generated by the laser marking head 2 when marking at the current position, and prevent the smoke from being discharged in time and accumulating inside the sealing cover 8, which will affect the marking effect of the laser marking head 2. After the marking of the packaging bag is completed, the sealing cover 8 is driven to move upward, and the sleeve 18 moves upward accordingly. The piston 20 moves downward relative to the sleeve 18, and the gas inside the sleeve 18 is discharged through the conduit 22 and the telescopic rubber ring 23, so that the packaging bag is separated from the bottom of the sealing cover 8, avoiding the problem that the sealing cover 8 is easy to stick to the packaging bag after pressing down the packaging bag. Finally, the conveyor 1 is started to drive the marked packaging bag to continue to move.

[0053] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in the field understand the principle of the above invention, the specific details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is to automatically control by a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in the field; the above only describes some exemplary embodiments of the present invention by way of explanation. Undoubtedly, for ordinary technicians in the field, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A laser marking machine for food production and packaging, comprising a conveyor (1) and a laser marking head (2), characterized in that: Also includes: A bracket (3) mounted on the top of the conveyor (1); A displacement mechanism, which is mounted on the bracket (3) and is used to drive the laser marking head (2) to move; A closing mechanism, which is arranged above the conveyor (1) and is used to close the packaging bag during the marking process; A fixed-point smoke removal mechanism, which is connected to the closing mechanism and is used to perform fixed-point cleaning of smoke generated by marking multiple positions of packaging bags in the closing mechanism; The flattening and separating integrated mechanism is connected to the closing mechanism and is used to automatically flatten the packaging bag before closing the packaging bag, and is also used to separate the packaging bag from the closing mechanism after marking is completed; The sealing mechanism comprises two cylinders (7) fixedly connected to the inner wall of the top of the bracket (3) and sealing covers (8) installed at the extended ends of the two cylinders (7); The flattening and separating integrated mechanism is provided with two and is respectively mounted on the outer walls of both sides of the sealing cover (8); the flattening and separating integrated mechanism comprises a plurality of sleeves (18) mounted on the outer wall of one side of the sealing cover (8) and a fixing strip (19) fixedly connected to the inner wall of the bracket (3); A first slide groove (9) is provided on the top of the sealing cover (8), a first support block (10) is slidably connected inside the first slide groove (9), and the laser marking head (2) is installed inside the first support block (10); Two first telescopic curtains (11) are also installed inside the first sliding groove (9), and opposite ends of the two first telescopic curtains (11) are respectively fixedly connected to two ends of the first support block (10); The fixed-point smoke removal mechanism comprises second slide grooves (12) respectively provided on the outer walls of both sides of the sealing cover (8) and an exhaust pipe (13) installed at one end of the sealing cover (8); A second support block (14) is slidably connected to the inner walls of the two second slide grooves (12), and an air intake pipe (15) is installed on the second support block (14), and the air intake end of the air intake pipe (15) is arranged to face upward.

2. A laser marking machine for food production and packaging according to claim 1, characterized in that: The displacement mechanism comprises a screw rod (4) rotatably connected to the inner wall of the bracket (3) and a motor (5) mounted on the outer wall of one side of the bracket (3); The output end of the motor (5) is fixedly connected to one end of the screw rod (4); The outside of the screw rod (4) is threadedly connected to a connecting shell (6), the laser marking head (2) is slidably connected to the inside of the connecting shell (6), and the top of the connecting shell (6) is slidably connected to the inner wall of the top of the bracket (3).

3. A laser marking machine for food production and packaging according to claim 2, characterized in that: Two second telescopic curtains (16) are installed inside the second sliding groove (12), and opposite ends of the two second telescopic curtains (16) are respectively fixedly connected to two ends of the second support block (14).

4. A laser marking machine for food production and packaging according to claim 3, characterized in that: A linkage block (17) is fixedly connected to the top of the second support block (14); the other end of the linkage block (17) is connected to the laser marking head (2); when the laser marking head (2) moves, the linkage block (17) drives the second support block (14) and the air intake pipe (15) to move synchronously.

5. A laser marking machine for food production and packaging according to claim 4, characterized in that: A piston (20) is installed inside the sleeve (18), a fixing rod (21) is fixedly connected to the top of the piston (20), and a top end of the fixing rod (21) is fixedly connected to the bottom of the fixing bar (19); A conduit (22) is installed at the bottom of the sleeve (18), and a telescopic rubber ring (23) is installed at the other end of the conduit (22); The bottom of the sealing cover (8) is provided with a plurality of hidden grooves, and the telescopic rubber ring (23) is located inside the hidden grooves.

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