Automatic product marking device

Abstract

The invention relates to the field of packaging technologies, in particular to an automatic product marking device which comprises a base, a positioning assembly, a marking assembly, a storage roller and a discharging roller, the storage roller and the discharging roller are rotatably connected to the surface of the base at intervals, the positioning assembly comprises at least two positioning rollers and a plurality of positioning rings, the at least two positioning rollers are rotatably connected to the surface of the base at intervals, and the positioning rings are arranged on the positioning rollers. Every two positioning rings form a group, the multiple groups of positioning rings are connected to the surface of the base at intervals, a positioning gap for a label tape to penetrate through is reserved between every two positioning rings, the marking assembly is connected to the base, and the marking assembly can adsorb a label on the surface of the label tape between every two positioning gaps and adhere to the surface of a product. According to the automatic marking device, the positioning roller and the positioning ring are arranged, the marking assembly accurately adsorbs a label on the surface of the label belt between the two positioning gaps and adheres the label to the surface of a product, automatic marking of the product is completed, the position of the label belt does not need to be directionally corrected by workers, and therefore the marking efficiency of the product is improved.

Description

Technical Field

[0001] The present application relates to the field of packaging technology, and in particular to an automatic product marking device. Background Art

[0002] Automatic labeling device is a device that sticks rolls of self-adhesive paper labels on products or specified packaging.

[0003] During the operation of the automatic marking device, the label tape is wound on the reel, and the pneumatic suction cup absorbs the label on the label tape and sticks it on the surface of the product, thereby completing the automatic marking of the product surface; however, during the process of the reel rotating to pull the label tape out, the position of the label tape toward the adsorption end of the pneumatic suction cup is prone to deviation, making it impossible for the pneumatic suction cup to accurately absorb the label on the label tape. The staff needs to correct the position of the label tape in time, thereby reducing the marking efficiency of the product. Summary of the invention

[0004] In order to improve the problem of product marking efficiency, the present application provides an automatic product marking device.

[0005] This application provides an automatic product marking device, which adopts the following technical solution: A product automatic marking device comprises a base, a positioning component, a marking component, a storage roller and a feeding roller, wherein the storage roller and the feeding roller are connected to the surface of the base in rotation at intervals, and the roller surfaces of the storage roller and the feeding roller are both provided for winding of label tapes, and the positioning component comprises at least two positioning rollers and a plurality of positioning rings, at least two of the positioning rollers are connected to the surface of the base in rotation at intervals, the axes of the positioning rollers and the axes of the storage rollers are parallel to each other, and the roller surfaces of the positioning rollers are in rolling contact with the surface of the label tape, and every two of the positioning rings form a group, and a plurality of groups of the positioning rings are connected to the surface of the base at intervals, and each group of the positioning rings corresponds to the positioning rollers one by one, and the inner rings of the two positioning rings of the same group are provided for the positioning rollers to pass through, and the two positioning rings are provided for the positioning rollers to pass through. A positioning gap is left between the positioning rings for the label tape to pass through, the end of the label tape on the storage roller passes through the positioning gaps on the two positioning rollers in turn and is wound around the roller surface of the unloading roller, the marking component is connected to the base, and the marking component can absorb the label on the surface of the label tape between the two positioning gaps and stick it on the surface of the product; the marking component includes a positioning plate, a displacement cylinder, a lifting cylinder and a pneumatic suction cup, the positioning plate is connected to the surface of the base, the surface of the positioning plate is for the product to be placed, and the surface of the positioning plate is provided with a positioning cavity for the label tape to pass through, the end of the label tape on the storage roller passes through the positioning gap on one of the positioning rollers, the positioning cavity and the positioning gap on the other positioning roller in turn and is wound around Wrapped on the roller surface of the unloading roller, the inner wall of the positioning cavity presses against the surface of the label belt and drives the end of the label to separate from the surface of the label belt, the displacement cylinder is connected to the surface of the base, the lifting cylinder is connected to the end of the piston rod of the displacement cylinder, the displacement cylinder can drive the lifting cylinder to approach the product on the surface of the positioning plate, the pneumatic suction cup is connected to the piston rod of the lifting cylinder, the lifting cylinder drives the pneumatic suction cup to approach the positioning plate, the pneumatic suction cup absorbs the label on the surface of the positioning plate, the displacement cylinder drives the lifting cylinder to approach the product, and the pneumatic suction cup sticks the label to the surface of the product; the base is connected to a cleaning component, the cleaning component includes a power plate, a power piston and an elastic member, and the base is close to the positioning plate The surface is provided with a power channel for the sliding of the power piston, the sliding direction of the power piston and the axis of the piston rod of the lifting cylinder are parallel to each other, one end of the elastic member in the elastic direction is connected to the inner wall of the power channel, and the other end of the elastic member in the elastic direction is connected to the surface of the power piston, the elastic member has the elastic force to drive the power piston to slide in the direction away from the power channel, and the end of the power piston has a tendency to protrude from the surface of the base, one end of the power plate is connected to the surface of the power piston protruding from the base, and the other end of the power plate abuts against the rod surface of the lifting cylinder piston rod, an air outlet is provided on the surface of the base, the air outlet is connected to the power channel, and the outlet opening faces the label surface on the label tape.

[0006] The label tape is wound on the roller surface of the storage roller, and the end portion of the label tape on the storage roller is sequentially passed through the positioning gaps on the two positioning rollers and wound on the roller surface of the feeding roller, and the label tape between the storage roller and the feeding roller is in a taut state, and the two positioning rings of the same group clamp the two ends of the label tape toward the surface of the positioning gap to form a positioning, so that the storage roller rotates to drive the label tape to be pulled out. The roller surface of the positioning roller is in rolling contact with the label tape, reducing the wear between the positioning roller and the label tape, and extending the service life of the automatic marking device for the product. The marking component accurately absorbs the label on the surface of the label tape between the two positioning gaps and sticks it on the surface of the product, and completes the automatic marking of the product without the need for the staff to perform directional correction on the position of the label tape, thereby improving the marking efficiency of the product; the end portion of the label tape on the storage roller sequentially passes through the positioning gap on one of the positioning rollers, the positioning cavity and the positioning gap on the other positioning roller and is wound on the roller surface of the feeding roller, and the inner wall of the positioning cavity is pressed against the surface of the label tape and drives The label end is separated from the surface of the label belt, and the label surface faces the adsorption end of the pneumatic suction cup. The lifting cylinder drives the pneumatic suction cup to approach the positioning plate, and the pneumatic suction cup adsorbs the surface of the positioning plate. The displacement cylinder drives the lifting cylinder to approach the product, and the label pasting end faces the product surface. The lifting cylinder drives the pneumatic suction cup to slide in the direction close to the product, and the pneumatic suction cup drives the label to be pasted and fixed on the surface of the product, thereby completing the automated marking process of the product. When the lifting cylinder drives the pneumatic suction cup to approach the positioning plate, the rod surface of the lifting cylinder piston abuts against the surface of the power plate and drives the power plate to slide in the direction close to the power flow channel, driving the power piston to overcome the elastic force of the elastic member and slide in the direction close to the power flow channel, the air pressure in the power flow channel increases, and the power flow channel is connected to the air outlet. The air in the power flow channel is discharged from the air outlet and impacts the label surface on the label belt, taking away impurities on the label surface, and realizing directional cleaning of the label surface, so that the label is not easy to separate from the adsorption end of the pneumatic suction cup, thereby improving the stability of the pneumatic suction cup on the label adsorption.

[0007] Optionally, it also includes a robot arm connected to the surface of the base, which can absorb the product and place it on the positioning plate surface. When the pneumatic suction cup sticks the label on the product surface, the robot arm absorbs the product and detaches from the positioning plate surface.

[0008] By adopting the above technical solution, the robot absorbs the unprocessed product and places it on the positioning plate surface, the pneumatic suction cup sticks the label on the product surface, the robot absorbs the product and detaches from the positioning plate surface, realizing automatic loading and unloading of the product, eliminating the need for staff to manually load and unload the product, further improving the marking efficiency of the product.

[0009] Optionally, the cleaning assembly also includes a directional plate, a one-way valve 1 and a one-way valve 2, the directional plate being connected to the inner wall of the power channel near the air outlet, the directional plate having two power chambers spaced apart on the plate surface facing the power channel, the directional plate having two installation chambers spaced apart on the plate surface facing the air outlet, the installation chambers correspond to and are connected with the power chambers one by one, an air inlet is formed on the surface of the base facing one of the installation chambers, the air inlet is connected to one of the installation chambers, and the air outlet is connected to the other installation chamber, the one-way valve 1 is connected to the inner wall of one of the installation chambers, the one-way valve 1 supplies air in the air inlet to enter the installation chamber, the one-way valve 2 is connected to the inner wall of the other installation chamber, and the one-way valve 2 supplies air in the installation chamber to enter the air outlet.

[0010] By adopting the above technical scheme, when the rod surface of the lifting cylinder piston rod abuts against the surface of the power plate and drives the power plate to slide in the direction close to the power flow channel, the power piston is driven to slide in the direction close to the power flow channel, and the air pressure in the power flow channel increases. The air in the power flow channel passes through the power chamber, the installation chamber and the one-way valve 2 and impacts the label surface on the label tape from the air outlet, thereby realizing directional cleaning of the label; when the lifting cylinder piston rod is retracted, the elastic force of the elastic part 1 drives the power piston to slide in the direction away from the power flow channel, and the air pressure in the power flow channel decreases. The outside air passes through the air inlet, the one-way valve 1, and the installation chamber in turn and enters the power flow channel from the power chamber, thereby promoting the gas flow near the label tape and improving the efficiency of cleaning impurities on the label surface.

[0011] Optionally, a heat dissipation channel is opened in the positioning roller close to the storage roller, and the heat dissipation channel penetrates the roller surface of the positioning roller toward the inner ring of the positioning ring. The inner ring of the positioning ring is opened with a heat dissipation ring channel, and the surface of the positioning ring facing the positioning gap is opened with heat dissipation holes, and the heat dissipation channel connects the heat dissipation ring channel and the heat dissipation holes.

[0012] By adopting the above technical solution, the roller surface of the positioning roller is in rolling contact with the label tape, and the roller surface of the positioning roller converts part of the kinetic energy into heat energy, the positioning roller heats up, and the inner wall of the heat dissipation loop is in full contact with the air in the heat dissipation loop and performs heat exchange, thereby cooling the inner wall of the heat dissipation loop; at the same time, the air in the heat dissipation loop heats up and expands, is discharged from the heat dissipation holes through the heat dissipation loop and impacts the label surface on the label tape, so that the positioning roller is not easily worn out due to long-term operation in a high temperature state, thereby extending the service life of the product automatic marking device.

[0013] Optionally, the directional plate is slidably connected to the inner wall of the power flow channel, the base is connected to a heat dissipation component, the heat dissipation component includes a thermal expansion and contraction arc strip, a gear, an abutment block and a rack, a heat dissipation cavity is opened on the surface of the base facing the heat dissipation flow channel, the heat dissipation cavity connects the power flow channel and the heat dissipation flow channel, the gear is rotatably connected to the inner wall of the heat dissipation cavity, the gear axis and the positioning roller axis are parallel to each other, the abutment block is connected to the surface of the gear rotation shaft, one end of the thermal expansion and contraction arc strip is connected to the inner wall of the heat dissipation cavity close to the positioning roller rotation shaft, and the other end of the thermal expansion and contraction arc strip abuts The surface of the abutment block is connected, the axis line of the thermal expansion and contraction arc strip coincides with the axis line of the gear, one end of the rack is connected to the plate surface of the directional plate facing the heat dissipation cavity, the other end of the rack meshes with the gear, and the surface of the base close to the positioning roller is provided with an air supply hole, and the air supply hole is connected to the heat dissipation cavity. When the thermal expansion and contraction arc strip heats up and expands, the gear is driven to rotate, driving the directional plate to slide toward the direction close to the heat dissipation cavity, the one-way valve 1 is connected to the air supply hole, the one-way valve 2 is connected to the heat dissipation channel, and the plate surface of the directional plate is pressed against the inner wall of the power channel and closes the air inlet and outlet holes.

[0014] By adopting the above technical scheme, when the positioning roller rotates on the surface of the base, the positioning roller converts part of the kinetic energy into thermal energy, the positioning roller heats up, and the thermal expansion and contraction arc strip is located on the inner wall of the heat dissipation cavity close to the rotating shaft of the positioning roller. The positioning roller transfers part of the thermal energy to the thermal expansion and contraction arc strip through the inner wall of the heat dissipation cavity. The thermal expansion and contraction arc strip heats up and expands, and the end face of the thermal expansion and contraction arc strip abuts the surface of the abutment block and drives the gear to rotate. The rack meshes with the gear, driving the directional plate to slide along the inner wall of the power flow channel toward the direction close to the heat dissipation cavity. The one-way valve 1 is connected to the air supply hole, and the one-way valve 2 is connected to the heat dissipation flow channel. The plate surface of the directional plate abuts against the inner wall of the power flow channel and closes the air inlet and outlet. The air hole, when the air pressure in the power flow channel increases, the air in the power flow channel passes through the power cavity, the installation cavity, and the one-way valve two in turn and enters the heat dissipation flow channel. The air in the heat dissipation flow channel fully contacts the inner wall of the heat dissipation flow channel for heat exchange and is discharged from the heat dissipation hole through the heat dissipation ring channel; when the air pressure in the power flow channel decreases, the outside air passes through the air supply hole, the one-way valve one, the installation cavity and the power cavity in turn and enters the power flow channel, realizing the directional supply of air in the power flow channel. There is no need for an external air supply device to supply air to the heat dissipation flow channel, reducing the cost investment and the production cost of the product automatic marking device, thereby reflecting the concept of energy saving.

[0015] Optionally, the heat dissipation assembly further comprises a guide pipe, one end of which is connected to the surface of the positioning ring facing the label tape, the inner cavity of the guide pipe is connected to the heat dissipation hole, and the other end of the guide pipe faces the label surface on the label tape.

[0016] By adopting the above technical solution, one end of the guide pipe is connected to the inner cavity of the heat dissipation hole, and the other end of the guide pipe is directed to the label surface on the label tape. The air in the heat dissipation hole impacts the label surface through the inner cavity of the guide pipe, thereby achieving accurate cleaning of impurities on the label surface.

[0017] Optionally, the positioning plate is connected to a limit assembly, and the limit assembly includes a contact switch, a limit piston, an electromagnet, an elastic member 2 and a magnetic block. A limit flow channel for sliding of the limit piston is provided on the surface of the positioning plate close to the positioning cavity, and the sliding direction of the limit piston is parallel to the axis of the piston rod of the lifting cylinder. A storage gas channel is provided on the surface of the positioning plate, and the storage gas channel is connected to the inner cavity of the limit flow channel. The electromagnet is connected to the inner wall of the limit flow channel close to the storage gas channel, and the magnetic block is connected to the surface of the limit piston facing the electromagnet. The contact switch is connected to the surface of the positioning plate, and the contact switch is located on the side of the limit flow channel away from the positioning cavity. The contact switch is electrically connected to the electromagnet. When the inner wall of the positioning cavity is pressed against the label When the belt surface drives the end of the label to separate from the surface of the label belt and cover the opening of the limit flow channel, the contact switch abuts the label surface and is turned on, the electromagnet is energized and has magnetic force, the electromagnet and the magnetic block repel each other with the same poles, driving the limit piston to slide in the direction away from the air storage channel, the external air pressure presses against the label surface and limits the label to the surface of the positioning plate, and at the same time, the external air enters the limit flow channel through the air storage channel; one end of the elastic part 2 in the elastic force direction is connected to the inner wall of the limit flow channel, and the other end of the elastic part 2 in the elastic force direction is connected to the surface of the limit piston, the elastic force of the elastic part 2 is smaller than the magnetic force between the electromagnet and the magnetic block, and the elastic part 2 has a tendency to drive the limit piston to slide in the direction close to the air storage channel.

[0018] When the pressure on the label is too low, the pressure on the label is too low, and the pressure on the label surface is too low, so the pressure on the label surface ... so the pressure on the label surface is too low, and the pressure on the label surface is too low, so the pressure on the label surface is too low, so the pressure on the label surface is too low, so the pressure on the label surface is

[0019] Optionally, the limiting flow channel penetrates the surface of the positioning plate in the depth direction, and the surface of the positioning plate facing away from the pneumatic suction cup is connected to a positioning nozzle, one end of the positioning nozzle is connected to the inner cavity of the limiting flow channel, and the other end of the positioning nozzle faces the surface of the label tape without a label.

[0020] By adopting the above technical scheme, the limiting flow channel runs through the surface of the positioning plate. When the limiting piston slides back and forth on the inner wall of the limiting flow channel, the air in the limiting flow channel is driven to impact the surface of the label tape without a label through the positioning nozzle. The surface of the label tape is fully in contact with the air and heat exchange is carried out, thereby achieving cooling of the label tape, making it difficult for the label tape wound on the surface of the unloading roller to transfer heat energy to the surface of the unloading roller, thereby ensuring the stability of the temperature of the surface of the unloading roller.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. With the positioning roller and the positioning ring, the marking component can accurately absorb the label on the surface of the label tape between the two positioning gaps and stick it on the surface of the product, so as to achieve automatic marking of the product. There is no need for the staff to make directional corrections to the position of the label tape, thereby improving the marking efficiency of the product. 2. The positioning plate, displacement cylinder, lifting cylinder and pneumatic suction cup are set up. The lifting cylinder drives the pneumatic suction cup to slide towards the product, and the pneumatic suction cup drives the label to be attached and fixed on the surface of the product, so as to complete the automatic marking process of the product; 3. The setting of the robot realizes automatic loading and unloading of products, eliminating the need for staff to manually load and unload products, further improving the marking efficiency of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0023] Figure 2 It is a partial cross-sectional view in an embodiment of the present application, mainly showing the limiting component.

[0024] Figure 3 It is a partial cross-sectional view in an embodiment of the present application, mainly showing the cleaning component.

[0025] Figure 4 It is a schematic diagram of the overall structure of the oriented board in the embodiment of the present application.

[0026] Figure 5 It is a cross-sectional view of the positioning roller and the positioning ring in the embodiment of the present application.

[0027] Figure 6 It is a schematic diagram of the partial structure of the heat dissipation component in the embodiment of the present application.

[0028] Description of the reference numerals: 1. base; 11. power flow channel; 12. air outlet; 13. air inlet; 14. heat dissipation cavity; 15. air supply hole; 2. positioning assembly; 21. positioning roller; 211. heat dissipation flow channel; 22. positioning ring; 221. positioning gap; 222. heat dissipation ring channel; 223. heat dissipation hole; 3. marking assembly; 31. positioning plate; 311. positioning cavity; 312. limiting flow channel; 3121. limiting section 1; 3122. limiting section 2; 313. air storage channel; 32. displacement cylinder; 33. lifting cylinder; 34. pneumatic suction cup; 4. storage Material roller; 5. Feeding roller; 6. Robot; 7. Label tape; 8. Limit assembly; 81. Contact switch; 82. Limit piston; 83. Electromagnet; 84. Elastic part 2; 85. Magnetic block; 9. Cleaning assembly; 91. Power plate; 92. Power piston; 93. Elastic part 1; 94. Orienting plate; 941. Power chamber; 942. Installation chamber; 95. One-way valve 1; 96. One-way valve 2; 10. Positioning nozzle; 16. Guide pipe; 17. Heat dissipation assembly; 171. Thermal expansion and contraction arc strip; 172. Gear; 173. Abutment block; 174. Rack. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 This application is described in further detail.

[0030] The present application embodiment discloses a product automatic marking device. Figure 1 The product automatic marking device includes a base 1, a positioning component 2, a marking component 3, a storage roller 4, a feeding roller 5 and a manipulator 6. The bottom of the base 1 abuts the ground to form a support. The manipulator 6 is installed on the surface of the base 1. The manipulator 6 can clamp the unmarked product and place it on the base 1 and remove the marked product. The storage roller 4 and the feeding roller 5 are connected to the surface of the base 1 with interval rotation. The axis of the storage roller 4 and the axis of the feeding roller 5 are parallel to each other, and the axis of the storage roller 4 and the width direction of the base 1 are parallel to each other. One end of the label tape 7 is wound on the roller surface of the storage roller 4, and the other end of the label tape 7 is wound on the roller surface of the feeding roller 5. The positioning component 2 is installed on the base 1. The positioning component 2 can accurately position the label tape 7 pulled out by the storage roller 4, so that the label tape 7 is not easy to deviate. The marking component 3 can absorb the label on the label tape 7 and stick it on the product surface, so as to realize the automatic marking of the product, and there is no need for the staff to perform directional correction on the position of the label tape 7, thereby improving the marking efficiency of the product.

[0031] Reference Figure 1The positioning assembly 2 includes at least two positioning rollers 21 and a plurality of positioning rings 22. In the embodiment of the present application, the number of positioning rollers 21 is two, and the number of positioning rings 22 is four. The two positioning rollers 21 are connected to the surface of the base 1 by rotation at intervals. The axes of the positioning rollers 21 and the axes of the storage rollers 4 are parallel to each other. The roller surfaces of the positioning rollers 21 are in rolling contact with the surface of the label belt 7, and the two positioning rollers 21 are located between the storage rollers 4 and the unloading rollers 5. The four positioning rings 22 are divided into two groups. The two groups of positioning rings 22 are fixed on the surface of the base 1 at intervals. Each group of positioning rings 22 corresponds to the positioning rollers 21 one by one. The axes of the two positioning rings 22 in the same group coincide with the axes of the positioning rollers 21. The inner rings of the two positioning rings 22 are passed through the ends of the positioning rollers 21, and the roller surfaces of the positioning rollers 21 are in rolling contact with the inner rings of the positioning rings 22.

[0032] Reference Figure 1 A positioning gap 221 is left between the two positioning rings 22 on the positioning roller 21 for the label tape 7 to pass through. The surfaces of the two positioning rings 22 facing each other are pressed against the two sides of the label tape 7 to form a limit. The end of the label tape 7 on the storage roller 4 passes through the positioning gaps 221 on the two positioning rollers 21 in turn and is wound around the roller surface of the unloading roller 5, ensuring that the storage roller 4 rotates to drive the label tape 7 to be pulled out without easy deviation, thereby improving the stability of the label adsorption component 3.

[0033] Reference Figure 1 and Figure 2 The marking assembly 3 includes a positioning plate 31, a displacement cylinder 32, a lifting cylinder 33 and a pneumatic suction cup 34. The positioning plate 31 is fixed on the surface of the base 1. The positioning plate 31 is located between the two positioning rollers 21. The surface of the positioning plate 31 close to the manipulator 6 is used for placing products. The top surface of the positioning plate 31 is provided with a positioning cavity 311 for the label belt 7 to pass through. The positioning cavity 311 passes through the surface of the positioning plate 31 along its depth direction. The end of the label belt 7 on the storage roller 4 passes through one of the positioning rollers 21 in turn. The positioning gap 221, the positioning cavity 311, and the positioning gap 221 on the other positioning roller 21 are wound around the roller surface of the unloading roller 5. The label tape 7 between the unloading roller 5 and the storage roller 4 is in a taut state. When the storage roller 4 rotates to pull the label tape 7 out, the label tape 7 passes through the positioning cavity 311. The inner wall of the positioning cavity 311 close to the manipulator 6 presses against the surface of the label tape 7 and drives the end of the label to detach from the surface of the label tape 7 and abut against the surface of the positioning plate 31, and the label surface faces the adsorption end of the marking component 3.

[0034] Reference Figure 1 and Figure 2, the displacement cylinder 32 is fixed to the surface of the base 1 by bolts, the axis of the piston rod of the displacement cylinder 32 is parallel to the length direction of the base 1, the end of the piston rod of the displacement cylinder 32 faces the manipulator 6, the lifting cylinder 33 is fixed to the end of the piston rod of the displacement cylinder 32, the axis of the piston rod of the lifting cylinder 33 is parallel to the height direction of the base 1, the piston rod of the lifting cylinder 33 faces the surface of the positioning plate 31, and the pneumatic suction cup 34 is fixed to the end of the piston rod of the lifting cylinder 33, and the adsorption end of the pneumatic suction cup 34 faces the label surface on the positioning plate 31; when the lifting cylinder 33 is fixed to the end of the piston rod of the lifting cylinder 33, the suction end of the pneumatic suction cup 34 faces the label surface on the positioning plate 31; When the cylinder 33 drives the pneumatic suction cup 34 to slide in the direction close to the label, the pneumatic suction cup 34 absorbs the label on the surface of the positioning plate 31, the lifting cylinder 33 drives the pneumatic suction cup 34 to slide in the direction away from the positioning plate 31, and the label is separated from the surface of the positioning plate 31, the displacement cylinder 32 drives the lifting cylinder 33 to slide in the direction close to the product, and the label pasting end faces the product surface, the lifting cylinder 33 drives the pneumatic suction cup 34 to slide in the direction close to the product, and the pneumatic suction cup 34 pastes and fixes the label on the surface of the product, thereby completing the automatic marking of the product.

[0035] Reference Figure 1 and Figure 2 The positioning plate 31 is provided with a limit assembly 8, which can limit the label to the surface of the positioning plate 31. The limit assembly 8 includes a contact switch 81, a limit piston 82, an electromagnet 83, an elastic member 84 and a magnetic block 85. The material of the limit piston 82 can be rubber or silicone. In the embodiment of the present application, the material of the limit piston 82 is rubber, which has a certain deformation ability. The elastic member 84 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 84 is a compression spring, which has a certain deformation ability. The positioning plate 31 is provided with a limit piston 82 on the surface of the label. The sliding limit flow channel 312, the sliding direction of the limit piston 82 and the height direction of the base 1 are parallel to each other, the top surface of the positioning plate 31 is provided with a gas storage channel 313, the gas storage channel 313 is connected to the inner cavity of the limit flow channel 312, the electromagnet 83 is installed on the inner wall of the limit flow channel 312 close to the gas storage channel 313, the magnetic block 85 is installed on the surface of the limit piston 82 facing the electromagnet 83, the contact switch 81 is installed on the surface of the positioning plate 31 facing the label, the contact switch 81 is located on the side of the limit flow channel 312 away from the positioning cavity 311, and the contact switch 81 is electrically connected to the electromagnet 83.

[0036] Reference Figure 1 and Figure 2When the inner wall of the positioning cavity 311 is pressed against the surface of the label belt 7, the end of the label is driven to separate from the surface of the label belt 7 and cover the opening of the limiting flow channel 312, the contact switch 81 is pressed against the surface of the label and is turned on, the electromagnet 83 is energized and has magnetic force, the electromagnet 83 and the magnetic block 85 repel each other with the same poles, and drive the limiting piston 82 to slide in the direction away from the label, the air pressure in the limiting flow channel 312 is reduced, and the air pressure in the limiting flow channel 312 is less than the external air pressure. The external air pressure presses against the surface of the label and limits the label to the surface of the positioning plate 31, so that the label is not easily displaced on the surface of the positioning plate 31; at the same time, the air storage channel 313 is connected to the limiting flow channel 312, and the external air enters the limiting flow channel 312 through the air storage channel 313, so as to realize the pressure regulation in the limiting flow channel 312, and the external atmospheric pressure is equal to the air pressure in the limiting flow channel 312, so that the pressure of the external air on the label disappears, and the pneumatic suction cup 34 stably adsorbs the label on the surface of the positioning plate 31.

[0037] Reference Figure 1 and Figure 2 The limiting flow channel 312 penetrates the surface of the positioning plate 31 along its own depth, and the limiting piston 82 separates the limiting flow channel 312 into a limiting section 1 3121 and a limiting section 2 3122. The limiting section 1 3121 is connected to the flow storage channel 313. One end of the elastic member 2 84 in the elastic direction is connected to the inner wall of the limiting section 2 3122, and the other end of the elastic member 2 84 in the elastic direction is connected to the surface of the limiting piston 82. The elastic force of the elastic member 2 84 is smaller than the magnetic force between the electromagnet 83 and the magnetic block 85. The elastic member 2 84 has a tendency to drive the limiting piston 82 to slide toward the direction close to the magnetic block 85.

[0038] Reference Figure 1 and Figure 2 When the pneumatic suction cup 34 absorbs the label on the surface of the positioning plate 31 and drives the label away from the surface of the positioning plate 31, the abutment effect between the contact switch 81 and the label disappears, the electromagnet 83 is powered off and loses its magnetic force, and the elastic force of the elastic member 84 drives the limit piston 82 to slide in the direction close to the magnetic block 85, driving the air in the limit section 1 3121 to be discharged through the air storage channel 313 and impact the surface of the positioning plate 31, thereby achieving directional cleaning of the surface of the positioning plate 31; the surface of the positioning plate 31 facing away from the pneumatic suction cup 34 is fixed with a positioning nozzle 10 through a flange, and the positioning nozzle 1 0 The inner cavity is connected to the limiting section 2 3122, and the end of the positioning nozzle 10 away from the positioning plate 31 is oriented toward the surface of the label belt 7 without a label affixed thereto; when the limiting piston 82 slides in the direction away from the air storage passage 313, the air in the limiting section 2 3122 is driven to impact the surface of the label belt 7 without a label affixed thereto through the positioning nozzle 10, and the air is in full contact with the surface of the label belt 7 and performs heat exchange, thereby achieving cooling of the label belt 7, making it difficult for the label belt 7 wound on the unloading roller 5 to transfer heat energy to the unloading roller 5, thereby ensuring the stability of the operation of the unloading roller 5.

[0039] Reference Figure 1 and Figure 3 The base 1 is equipped with a cleaning component 9, which can clean the label surface on the label belt 7 to prevent impurities from adhering to the label surface, thereby ensuring the stability of the pneumatic suction cup 34 in adsorbing the label; the cleaning component 9 includes a power plate 91, a power piston 92, an elastic member 93, an directional plate 94, a one-way valve 95 and a one-way valve 96. The material of the power piston 92 can be rubber or silicone. In the embodiment of the present application, the material of the power piston 92 is rubber, which has a certain deformation ability. The elastic member 93 can be a compression spring or a tension spring. In the embodiment of the present application, In the example, the elastic member 93 is a compression spring with a certain deformation ability. A power channel 11 for the power piston 92 to slide is provided on the surface of the base 1 close to the positioning plate 31. The sliding direction of the power piston 92 is parallel to the height direction of the base 1. One end of the elastic member 93 in the elastic force direction is connected to the bottom wall of the power channel 11, and the other end of the elastic member 93 in the elastic force direction is connected to the surface of the power piston 92. The elastic member 93 has the elastic force to drive the power piston 92 to slide in the direction away from the power channel 11, and the end of the power piston 92 tends to protrude from the surface of the base 1.

[0040] Reference Figure 1 and Figure 3 One side of the power plate 91 is fixed to the end of the power piston 92 protruding from the base 1, and the other side of the power plate 91 abuts against the piston rod surface of the lifting cylinder 33. When the piston rod of the lifting cylinder 33 is extended and retracted, the power piston 92 is driven by the power plate 91 to slide back and forth on the inner wall of the power flow channel 11; the surface of the base 1 is provided with air outlet holes 12 and air inlet holes 13 at intervals, and the openings of the air outlet holes 12 and the air inlet holes 13 are located on both sides of the label belt 7, and the openings of the air outlet holes 12 face the label surface on the label belt 7, and the air outlet holes 12 and the air inlet holes 13 are both connected to the power flow channel 11.

[0041] Reference Figure 1 and Figure 4 The directional plate 94 is slidably connected to the inner wall of the power channel 11 near the air outlet 12. In the embodiment of the present application, the directional plate 94 is equivalent to a piston. The plate surface of the directional plate 94 facing the power channel 11 is provided with two power chambers 941, and the plate surface of the positioning plate 31 facing the air outlet 12 is provided with two installation chambers 942, one of which connects the power chamber 941 and the air inlet 13, and the other installation chamber 942 connects the power chamber 941 and the air outlet 12. A one-way valve 95 is installed on the inner wall of one of the installation chambers 942, and the one-way valve 95 supplies the air in the air inlet 13 to enter the installation chamber 942. A one-way valve 96 is installed on the inner wall of the other installation chamber 942, and the one-way valve 96 supplies the air in the installation chamber 942 to enter the air outlet 12.

[0042] Reference Figure 1 and Figure 4When the piston rod of the lifting cylinder 33 is extended, the power piston 92 is driven by the power plate 91 to slide in the direction close to the power flow channel 11, and the air pressure in the power flow channel 11 increases. The air in the power flow channel 11 passes through the power chamber 941, the installation chamber 942, and the one-way valve 96 in turn and is discharged from the air outlet 12 to impact the label surface on the label belt 7, thereby realizing directional cleaning of impurities on the label surface; when the piston rod of the lifting cylinder 33 is retracted, the power piston 92 is driven by the power plate 91 to slide in the direction away from the power flow channel 11, and the air pressure in the power flow channel 11 decreases. The outside air passes through the air inlet 13, the one-way valve 95, the installation chamber 942, and the power chamber 941 in turn to enter the power flow channel 11, thereby realizing directional replenishment of air in the power flow channel 11. There is no need for an external air pump to blow away impurities on the label surface on the label belt 7, thereby reducing energy loss and reflecting the concept of energy saving.

[0043] Reference Figure 1 and Figure 5 A heat dissipation channel 211 is provided in the positioning roller 21 close to the storage roller 4, and the heat dissipation channel 211 penetrates the roller surface of the positioning roller 21 toward the direction close to the inner ring wall of the positioning ring 22. A heat dissipation channel 222 is coaxially provided on the inner ring of the positioning ring 22. A heat dissipation hole 223 is provided on the surface of the positioning ring 22 facing the positioning gap 221. The heat dissipation channel 222 connects the heat dissipation hole 223 and the heat dissipation channel 211. A guide pipe 16 is fixed to the surface of the positioning ring 22 facing the positioning gap 221 through a flange. One end of the guide pipe 16 is connected to the heat dissipation hole 223, and the other end of the guide pipe 16 faces the label surface on the label belt 7. When the roller surface of the positioning roller 21 rolls in contact with the surface of the label belt 7, the positioning roller 21 converts part of the kinetic energy into heat energy, and the inner wall of the heat dissipation channel 211 transfers the heat energy to the air, the air heats up and expands, and the air in the heat dissipation channel 211 passes through the heat dissipation channel 222 and the heat dissipation hole 223 and impacts the label surface on the label belt 7 from the guide pipe 16, taking away impurities on the label surface, thereby achieving directional cleaning of the label surface.

[0044] Reference Figure 3 and Figure 6The base 1 is equipped with a heat dissipation component 17, which can drive the air in the power channel 11 into the heat dissipation channel 211. The heat dissipation component 17 includes a thermal expansion and contraction arc strip 171, a gear 172, an abutment block 173 and a rack 174. The material of the thermal expansion and contraction arc strip 171 can be a memory alloy or nylon. In the embodiment of the present application, the material of the thermal expansion and contraction arc strip 171 is a memory alloy with a good thermal expansion coefficient. The heat dissipation channel 211 penetrates the surface of the positioning roller 21 in the direction close to the base 1. The surface of the base 1 facing the heat dissipation channel 211 is provided with a heat dissipation cavity 14, and the heat dissipation cavity 14 is connected to The power flow channel 11 and the heat dissipation flow channel 211, the gear 172 is rotatably connected to the inner wall of the heat dissipation chamber 14, the axis of the gear 172 and the axis of the positioning roller 21 are parallel to each other, the end of the abutment block 173 is connected to the surface of the rotating shaft of the gear 172, one end of the rack 174 is fixed to the plate surface of the directional plate 94 facing the heat dissipation chamber 14, the other end of the rack 174 meshes with the tooth surface of the gear 172, one end of the thermal expansion and contraction arc bar 171 is fixed to the inner wall of the heat dissipation chamber 14 close to the rotating shaft of the positioning roller 21, the other end of the thermal expansion and contraction arc bar 171 abuts against the surface of the abutment block 173, and the axis line of the thermal expansion and contraction arc bar 171 coincides with the axis of the gear 172.

[0045] Reference Figure 1 and Figure 3 An air supply hole 15 is provided on the surface of the base 1 near the positioning roller 21. The air supply hole 15 passes through the outer wall of the base 1 along its own axis and is connected to the heat dissipation cavity 14. When the rotating shaft of the positioning roller 21 rotates continuously and converts part of the kinetic energy into thermal energy, the rotating shaft of the positioning roller 21 heats up, and the positioning roller 21 transfers part of the thermal energy to the thermal expansion and contraction arc strip 171 through the inner wall of the heat dissipation cavity 14. The thermal expansion and contraction arc strip 171 heats up and expands. The thermal expansion and contraction arc strip 171 drives the gear 172 to rotate through the abutment block 173, and the rack 174 engages with the gear 172, driving the directional plate 94 to slide toward the direction close to the heat dissipation cavity 14. The one-way valve 1 95 is connected to the air supply hole 15, and the one-way valve 2 96 is connected to the heat dissipation channel 211. The plate surface of the directional plate 94 is pressed against the inner wall of the power channel 11 and closes the air inlet 13 and the air outlet 12.

[0046] Reference Figure 3 and Figure 5When the power piston 92 slides toward the direction close to the power flow channel 11, the air pressure in the power flow channel 11 increases, and the air in the power flow channel 11 passes through the power cavity 941, the installation cavity 942 and the one-way valve 96 in sequence and enters the heat dissipation flow channel 211. The air fully contacts the inner wall of the heat dissipation flow channel 211 and performs heat exchange, thereby cooling the inner wall of the heat dissipation flow channel 211. The air pressure in the heat dissipation flow channel 211 increases, and the air in the heat dissipation flow channel 211 rushes out from the heat dissipation hole 223 through the heat dissipation ring channel 222. The label surface on the label belt 7 is hit to realize directional cleaning of impurities on the label surface; when the power piston 92 slides in the direction away from the power flow channel 11, the air pressure in the power flow channel 11 is reduced, and the outside air passes through the air supply hole 15, the one-way valve 95, the installation cavity 942 and enters the power flow channel 11 from the power cavity 941 in sequence, thereby realizing directional replenishment of air in the power flow channel 11, and no external air supply device is needed to supply air to the heat dissipation flow channel 211, thereby reducing energy loss, thereby embodying the concept of energy saving.

[0047] The implementation principle of the automatic product marking device of the embodiment of the present application is as follows: when the product is marked, the manipulator 6 absorbs the unmarked product and places it on the surface of the positioning plate 31, the storage roller 4 and the unloading roller 5 rotate, and the label belt 7 stretched by the storage roller 4 passes through the positioning gap 221, the positioning cavity 311 on one of the positioning rollers 21, and the positioning gap 221 on the other positioning roller 21 and is wound around the roller surface of the unloading roller 5. The surfaces of the two positioning rings 22 facing each other are pressed against the two sides of the label belt 7 to form a limit, so that the storage roller 4 rotates to drive the label belt 7 to rotate. The label strip 7 is not easy to deviate during the pulling out process. The inner wall of the positioning cavity 311 presses against the surface of the label strip 7 to drive the end of the label away from the surface of the label strip 7 and cover the opening of the limiting flow channel 312. The contact switch 81 presses against the surface of the label and is turned on. The electromagnet 83 is energized and has magnetic force. The electromagnet 83 and the magnetic block 85 repel each other with the same poles, driving the limiting piston 82 to slide away from the label. The air pressure in the limiting flow channel 312 is reduced. The air pressure in the limiting flow channel 312 is less than the external air pressure. The external air pressure presses against the surface of the label and limits the label to the positioning plate 3 1 board surface, so that the label is not easy to move on the board surface of the positioning plate 31; at the same time, the air storage channel 313 is connected to the limiting channel 312, and the outside air enters the limiting channel 312 through the air storage channel 313 to achieve pressure regulation in the limiting channel 312. The outside atmospheric pressure is equal to the air pressure in the limiting channel 312, so that the pressure of the outside air on the label disappears, and the lifting cylinder 33 drives the pneumatic suction cup 34 to slide in the direction close to the label, and the pneumatic suction cup 34 absorbs the label on the board surface of the positioning plate 31, and the lifting cylinder 33 drives the pneumatic suction cup 34 away from the label. The positioning plate 31 slides in the direction, the label is separated from the surface of the positioning plate 31, the displacement cylinder 32 drives the lifting cylinder 33 to slide in the direction close to the product, the label pasting end faces the product surface, the lifting cylinder 33 drives the pneumatic suction cup 34 to slide in the direction close to the product, the pneumatic suction cup 34 fixes the label on the surface of the product, and the robot 6 absorbs the marked product and separates it from the surface of the positioning plate 31, thereby completing the automatic marking of the product. There is no need for the staff to perform directional correction on the position of the label belt 7, thereby improving the marking efficiency of the product.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Automatic product marking device, characterized by: The invention comprises a base (1), a positioning component (2), a marking component (3), a storage roller (4) and a discharge roller (5), wherein the storage roller (4) and the discharge roller (5) are connected to the surface of the base (1) in an intermittent manner, and the roller surfaces of the storage roller (4) and the discharge roller (5) are both used for winding the label tape (7). The positioning component (2) comprises at least two positioning rollers (21) and a plurality of positioning rings (22), wherein at least two of the positioning rollers (21) are connected to the surface of the base (1) in an intermittent manner, and the axes of the positioning rollers (21) and the storage rollers (4) are parallel to each other, and the roller surfaces of the positioning rollers (21) are in rolling contact with the surface of the label tape (7), and each two of the positioning rings (22) form a group, and a plurality of groups of positioning rings (22) are connected to the surface of the base (1) in an intermittent manner. The positioning rings (22) are connected to the surface of the base (1) at intervals, and each group of the positioning rings (22) corresponds to the positioning roller (21) one by one. The inner rings of the two positioning rings (22) of the same group are both provided for the positioning roller (21) to pass through, and a positioning gap (221) is reserved between the two positioning rings (22) for the label tape (7) to pass through. The end of the label tape (7) on the storage roller (4) passes through the positioning gaps (221) on the two positioning rollers (21) in turn and is wound around the roller surface of the unloading roller (5). The marking component (3) is connected to the base (1), and the marking component (3) can absorb the label on the surface of the label tape (7) between the two positioning gaps (221) and stick it on the surface of the product. The marking assembly (3) comprises a positioning plate (31), a displacement cylinder (32), a lifting cylinder (33) and a pneumatic suction cup (34); the positioning plate (31) is connected to the surface of the base (1); the surface of the positioning plate (31) is for placing products; the surface of the positioning plate (31) is provided with a positioning cavity (311) for the label tape (7) to pass through; the end of the label tape (7) on the storage roller (4) passes through the positioning gap (221) on one of the positioning rollers (21), the positioning cavity (311) and the positioning gap (221) on the other positioning roller (21) in sequence and is wound around the roller surface of the unloading roller (5); the inner wall of the positioning cavity (311) is pressed against the surface of the label tape (7) and The end of the label is driven to separate from the surface of the label belt (7), the displacement cylinder (32) is connected to the surface of the base (1), the lifting cylinder (33) is connected to the end of the piston rod of the displacement cylinder (32), the displacement cylinder (32) can drive the lifting cylinder (33) close to the product on the surface of the positioning plate (31), the pneumatic suction cup (34) is connected to the piston rod of the lifting cylinder (33), the lifting cylinder (33) drives the pneumatic suction cup (34) close to the positioning plate (31), the pneumatic suction cup (34) absorbs the label on the surface of the positioning plate (31), the displacement cylinder (32) drives the lifting cylinder (33) close to the product, and the pneumatic suction cup (34) sticks the label on the surface of the product;The base (1) is connected to a cleaning assembly (9), and the cleaning assembly (9) includes a power plate (91), a power piston (92) and an elastic member (93). A power flow channel (11) for the power piston (92) to slide is provided on the surface of the base (1) close to the positioning plate (31). The sliding direction of the power piston (92) and the axis of the piston rod of the lifting cylinder (33) are parallel to each other. One end of the elastic member (93) in the elastic force direction is connected to the inner wall of the power flow channel (11), and the other end of the elastic member (93) in the elastic force direction is connected to the surface of the power piston (92). The elastic member 1 (93) has elastic force to drive the power piston (92) to slide in a direction away from the power flow channel (11), and the end of the power piston (92) tends to protrude from the surface of the base (1). One end of the power plate (91) is connected to the surface of the power piston (92) protruding from the base (1), and the other end of the power plate (91) abuts against the piston rod surface of the lifting cylinder (33). The surface of the base (1) is provided with an air outlet (12), the air outlet (12) is connected to the power flow channel (11), and the opening of the air outlet (12) faces the label surface on the label belt (7). ; 2. The automatic product marking device according to claim 1, characterized in that: The invention also includes a robot arm (6), which is connected to the surface of the base (1). The robot arm (6) can absorb the product and place it on the surface of the positioning plate (31). When the pneumatic suction cup (34) sticks the label on the surface of the product, the robot arm (6) absorbs the product and detaches from the surface of the positioning plate (31).

3. The automatic product marking device according to claim 1 is characterized in that: The cleaning assembly (9) further comprises an orientation plate (94), a first check valve (95) and a second check valve (96); the orientation plate (94) is connected to the inner wall of the power channel (11) near the air outlet (12); two power chambers (941) are provided at intervals on the plate surface of the orientation plate (94) facing the power channel (11); two installation chambers (942) are provided at intervals on the plate surface of the orientation plate (94) facing the air outlet (12); the installation chambers (942) correspond to the power chambers (941) one by one and are in communication with each other; the base (1) faces one of the installation chambers (941) An air inlet (13) is provided on the surface of the mounting cavity (942), the air inlet (13) is connected to one of the mounting cavities (942), the air outlet (12) is connected to the other mounting cavity (942), the one-way valve (95) is connected to the inner wall of one of the mounting cavities (942), the one-way valve (95) allows air in the air inlet (13) to enter the mounting cavity (942), the one-way valve (96) is connected to the inner wall of the other mounting cavity (942), the one-way valve (96) allows air in the mounting cavity (942) to enter the air outlet (12).

4. The automatic product marking device according to claim 3 is characterized in that: A heat dissipation channel (211) is provided in the positioning roller (21) close to the material storage roller (4); the heat dissipation channel (211) penetrates the roller surface of the positioning roller (21) in a direction close to the inner ring of the positioning ring (22); a heat dissipation ring channel (222) is provided in the inner ring of the positioning ring (22); a heat dissipation hole (223) is provided on the surface of the positioning ring (22) facing the positioning gap (221); and the heat dissipation channel (211) connects the heat dissipation ring channel (222) and the heat dissipation hole (223).

5. The automatic product marking device according to claim 4 is characterized in that: The directional plate (94) is slidably connected to the inner wall of the power channel (11); the base (1) is connected to a heat dissipation component (17); the heat dissipation component (17) comprises a heat expansion and cold contraction arc strip (171), a gear (172), an abutment block (173) and a rack (174); a heat dissipation cavity (14) is provided on the surface of the base (1) facing the heat dissipation channel (211); the heat dissipation cavity (14) is connected to the power channel (11) and the heat dissipation channel (211); the gear (172) is rotatably connected to the inner wall of the heat dissipation cavity (14); the axis of the gear (172) and the axis of the positioning roller (21) are parallel to each other; the abutment block (173) is connected to the surface of the rotating shaft of the gear (172); one end of the heat expansion and cold contraction arc strip (171) is connected to the inner wall of the heat dissipation cavity (14) close to the rotating shaft of the positioning roller (21); the other end of the heat expansion and cold contraction arc strip (171) abuts against the inner wall of the heat dissipation cavity (14) near the rotating shaft of the positioning roller (21); On the surface of the abutment block (173), the axis of the thermal expansion and contraction arc strip (171) coincides with the axis of the gear (172); one end of the rack (174) is connected to the plate surface of the directional plate (94) facing the heat dissipation cavity (14); the other end of the rack (174) meshes with the gear (172); an air supply hole (15) is provided on the surface of the base (1) close to the positioning roller (21); and the air supply hole (15) is connected to the heat dissipation cavity (14). When the thermal expansion and contraction arc strip (171) heats up and expands, it drives the gear (172) to rotate, driving the directional plate (94) to slide in the direction close to the heat dissipation cavity (14), the one-way valve 1 (95) is connected to the air supply hole (15), the one-way valve 2 (96) is connected to the heat dissipation channel (211), and the plate surface of the directional plate (94) is pressed against the inner wall of the power channel (11) and closes the air inlet hole (13) and the air outlet hole (12).

6. The automatic product marking device according to claim 5, characterized in that: The heat dissipation assembly (17) further comprises a guide pipe (16), one end of which is connected to the surface of the positioning ring (22) facing the label tape (7), the inner cavity of the guide pipe (16) is connected to the heat dissipation hole (223), and the other end of the guide pipe (16) faces the label surface on the label tape (7).

7. The automatic product marking device according to claim 1 is characterized in that: The positioning plate (31) is connected to a limiting assembly (8), the limiting assembly (8) comprising a contact switch (81), a limiting piston (82), an electromagnet (83), a second elastic member (84) and a magnetic block (85). A limiting flow channel (312) for the limiting piston (82) to slide is provided on a plate surface of the positioning plate (31) close to the positioning cavity (311). The sliding direction of the limiting piston (82) is parallel to the axis of the piston rod of the lifting cylinder (33). The plate surface of the positioning plate (31) is provided with a storage flow channel (312). 13), the gas storage channel (313) is connected to the inner cavity of the limiting channel (312), the electromagnet (83) is connected to the inner wall of the limiting channel (312) close to the gas storage channel (313), the magnetic block (85) is connected to the surface of the limiting piston (82) facing the electromagnet (83), the contact switch (81) is connected to the surface of the positioning plate (31), the contact switch (81) is located on the side of the limiting channel (312) away from the positioning cavity (311), and the contact switch (81) and the electromagnet (83) are electrically connected. When the inner wall of the positioning cavity (311) is pressed against the surface of the label belt (7) to drive the end of the label away from the surface of the label belt (7) and cover the opening of the limiting flow channel (312), the contact switch (81) is pressed against the surface of the label and is turned on, the electromagnet (83) is energized to have magnetic force, the electromagnet (83) and the magnetic block (85) repel each other with the same poles, and drive the limiting piston (82) to slide in a direction away from the flow storage channel (313), the external air pressure is pressed against the surface of the label and limits the label to the surface of the positioning plate (31), and at the same time External air enters the limiting flow channel (312) through the air storage channel (313); one end of the elastic member 2 (84) in the elastic direction is connected to the inner wall of the limiting flow channel (312), and the other end of the elastic member 2 (84) in the elastic direction is connected to the surface of the limiting piston (82); the elastic force of the elastic member 2 (84) is smaller than the magnetic force between the electromagnet (83) and the magnetic block (85); the elastic member 2 (84) has a tendency to drive the limiting piston (82) to slide in a direction close to the air storage channel (313).

8. The automatic product marking device according to claim 7, characterized in that: The limiting flow channel (312) penetrates the surface of the positioning plate (31) in the depth direction; the surface of the positioning plate (31) facing away from the pneumatic suction cup (34) is connected to a positioning nozzle (10); one end of the positioning nozzle (10) is connected to the inner cavity of the limiting flow channel (312), and the other end of the positioning nozzle (10) faces the surface of the label tape (7) to which no label is attached.

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