Plastic product labeling device

Abstract

The present invention belongs to the technical field of plastic product processing, and specifically is a plastic product printing device, comprising: a conveyor belt; a fixing frame, fixedly connected to one end of the top of the conveyor belt; a printing head, arranged below the fixing frame; a bracket, fixedly connected to the top of the conveyor belt, and connected to a rotating plate by rotation of a rotating rod; a drying box, fixedly connected to the other end of the top of the conveyor belt, for air-drying ink; through the cooperation of a first spring, a filter cartridge and a lifting plate, the ink in a mixing barrel enters through a feed hopper, and when the ink passes through the filter cartridge, an ink filter layer is arranged on the filter cartridge to filter out larger ink particles, fibers, iron fines and other impurities, wherein under the action of the gravity of the ink and the elastic force of the first spring, the lifting plate vibrates back and forth up and down, and the impurities on the inner wall of the filter cartridge are scraped off by the lifting plate to prevent the impurities from blocking the filter cartridge, reducing the filtering effect, and achieving a rapid filtering effect; after a period of time, the filtered ink is stirred by a stirring paddle to increase fluidity and maintain a consistent ink concentration.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic product processing, in particular to a plastic product marking device. Background Art

[0002] Plastic products are a general term for daily and industrial products made of plastic as the main raw material. Plastic products are widely used in life because of their light weight, excellent chemical stability, poor electrical insulation performance, and sound-absorbing and shock-absorbing effects. At present, when processing plastic products, it is necessary to print the company's logo on its surface to prove that it is a product of a certain company, so as to achieve the purpose of packaging and advertising.

[0003] A Chinese patent with announcement number CN207509979U discloses a plastic product printing device, including a printing body and a movable block, a hydraulic pump is fixedly installed in the middle of the upper end of the printing body, the bottom end of the hydraulic pump is fixedly connected to a hydraulic cavity, a hydraulic rod is arranged inside the hydraulic cavity, and the bottom end of the hydraulic rod is fixedly connected to the upper end of the movable block; a movable cavity is arranged inside the printing body, and springs A and spring B are arranged at the left and right ends of the movable cavity respectively; an ink dropper is fixedly installed inside the bottom end of the hydraulic rod, an ink storage box is fixedly installed on the right side of the upper end of the printing body, and an ink delivery tube is fixedly connected to the right side of the ink dropper; ink absorbing cotton A is fixedly installed inside the upper end of the movable block, the bottom end of the ink dropper is fixedly connected to the upper end of the ink absorbing cotton A, and an ink brush is connected to the bottom end of the ink absorbing cotton A; a printing head is arranged at the bottom end of the movable block, and a rotating shaft A and a rotating shaft B are respectively connected to the left and right ends of the printing head, and a motor is fixedly installed on the right end of the movable block; a hot fan is installed on the right side of the bottom of the printing body; thereby optimizing the automatic ink change of the printing device and making the device work more stably.

[0004] In the above technology, the continuity of printing is achieved and the quality of printing is guaranteed by automatic ink replenishment. However, the ink in the ink storage tank has poor ink quality due to the large particles of some ink and impurities such as fibers and iron fines. As a result, plastic products have a granular feel when printed and the printing effect is poor. In addition, long-term sedimentation may cause inconsistent concentrations at the bottom and top of the ink storage tank, resulting in stratification, which affects the appearance of the printed mark.

[0005] To this end, the present invention provides a plastic product marking device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a plastic product marking device described in the present invention comprises:

[0008] Conveyor belts;

[0009] A fixed frame, fixed to one end of the top of the conveyor belt;

[0010] The label printing head is arranged below the fixing frame;

[0011] The bracket is fixed to the top of the conveyor belt and is rotatably connected to a rotating plate via a rotating rod;

[0012] The drying box is fixed to the other end of the conveyor belt and is used to air dry the ink;

[0013] A mixing barrel, fixedly connected to the top of the fixed frame;

[0014] A filtering mechanism is arranged inside the mixing barrel;

[0015] The filtering mechanism comprises a filter cartridge, a lifting plate, and a first spring; the top of the filter cartridge is threadedly connected to the barrel cover of the mixing barrel; the bottom of the filter cartridge is fixedly connected to the first spring; the top of the first spring is fixedly connected to the lifting plate, and the lifting plate slides on the inner wall of the mixing barrel; the barrel cover of the mixing barrel is connected and fixedly connected to the feed hopper;

[0016] The top of the fixing frame is fixedly connected with a hydraulic cylinder; the output shaft of the hydraulic cylinder is fixedly connected with a mounting frame; the printing head is fixedly connected between the mounting frames; the top of the printing head is fixedly connected with a material distribution box; the bottom of the mixing barrel is connected and fixedly connected to the material distribution box through a telescopic tube; a solenoid valve is installed on the telescopic tube; a liquid level meter is fixedly connected in the material distribution box; an ink-absorbing cotton is arranged in the printing head;

[0017] The bottom of the mixing barrel is rotatably connected to a stirring rod via a rotating shaft; a plurality of stirring paddles are fixedly connected to the stirring rod.

[0018] Preferably, the outer wall of the distribution box is fixedly connected to a second motor; the output shaft of the second motor is fixedly connected to a bidirectional ball screw; both ends of the bidirectional ball screw are rotatably connected to the distribution box through bearings; the outer side of the bidirectional ball screw is symmetrically threaded with two movable plates; the bottom of the movable plate is fixedly connected to a sealing plate; the bottom of the sealing plate is in contact with the bottom inner wall of the distribution box; two guide rods are fixedly connected inside the distribution box; and the movable plates slide on the two guide rods.

[0019] Preferably, a plurality of third through holes are provided at the bottom of the material distribution box; a plurality of second through holes are provided at the top of the printing head; the second through holes correspond to the third through holes; a plurality of first through holes are provided on the sealing plate; the first through holes cooperate with the second through holes and the third through holes respectively.

[0020] Preferably, a cavity is provided on the fixed frame; the bottom of the stirring rod extends into the cavity and is fixedly connected to a first gear; a second gear is provided on one side of the first gear; the first gear is meshed with the second gear; a first motor is fixedly connected to the bottom of the fixed frame; the output shaft of the first motor extends into the cavity and is fixedly connected to the second gear.

[0021] Preferably, connecting plates are fixedly connected to the two side walls of the fixing frame close to the bracket; the connecting plates are rotatably connected to reciprocating screws via bearings; the bottoms of the reciprocating screws are rotatably connected to the conveyor belt via bearings; the reciprocating screws are threadedly connected to side plates; and a baffle is fixedly connected between the two side plates.

[0022] Preferably, the top of the reciprocating screw rods are fixedly connected to a rotating wheel; a belt is provided between the two rotating wheels; an L-shaped plate is fixedly connected to the top of one of the connecting plates; a third motor is fixedly connected to the top of the L-shaped plate; and the output shaft of the third motor is fixedly connected to the top of the reciprocating screw rod.

[0023] Preferably, the rotating plate is fixedly connected to the end of the rotating rod away from the baffle; the end of the rotating rod close to the baffle is fixedly connected to the third gear; the top of the bracket is fixedly connected to a fixed seat; the top of the fixed seat is fixedly connected to an electric push rod; the output end of the electric push rod is fixedly connected to a push plate; one end of the push plate is fixedly connected to a rack; the rack is meshed with the third gear; two sliding rods are fixedly connected between the two inner side walls of the fixed seat; two slide plates are fixedly connected to the side wall of the rack; the slide plates are all slidably connected on the sliding rods; a defective box is provided on one side of the conveyor belt; the defective box cooperates with the rotating plate; and a camera is fixedly connected to the bottom of the bracket.

[0024] Preferably, the drying box includes a heating rod, a fan and a ventilation plate; the ventilation plate is fixedly connected to the bottom of the drying box, facing the surface of the conveyor belt; a heating rod is provided on the top of the ventilation plate; the heating rod is arranged in a spiral shape; three fans are provided on the top of the ventilation plate; the fans are all fixedly connected to the top inner wall of the drying box.

[0025] Preferably, one end of the conveyor belt close to the drying box body is rotatably connected to a guide plate via a rotating shaft; a finished product box is provided below the guide plate; three second springs are fixed to the bottom of the guide plate; and the bottom of the second spring is fixed to the side wall of the finished product box.

[0026] Preferably, two limit blocks are symmetrically fixed to the bottom of one end of the conveyor belt close to the fixed frame; the limit blocks are all set to be trapezoidal; the inner side walls of the limit blocks are rotatably connected to a plurality of rollers through bearings.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. A plastic product printing device described in the present invention, through the cooperation of a first spring, a filter cartridge and a lifting plate, the ink in the mixing barrel enters through the feed hopper, and when the ink passes through the filter cartridge, an ink filter layer is arranged on the filter cartridge to filter out larger ink particles, fibers, iron fines and other impurities, wherein under the action of the ink gravity and the elastic force of the first spring, the lifting plate reciprocates up and down to scrape off impurities on the inner wall of the filter cartridge through the lifting plate to prevent the impurities from clogging the filter cartridge and reducing the filtering effect, thereby achieving a rapid filtering effect; after a period of time, the filtered ink is stirred by a stirring paddle to increase fluidity and maintain a consistent ink concentration.

[0029] 2. A plastic product printing device described in the present invention, through the cooperation of the first through hole, the second through hole and the third through hole, when ink needs to be replenished, the second motor is turned on, and the bidirectional ball screw is driven to rotate by the second motor. Since a ball nut seat is provided at the connection between the bidirectional ball screw and the movable plate, the radial movement of the movable plate is guaranteed by the ball nut seat, and the movable plate is driven to move in the opposite direction by the bidirectional ball screw, and the movable plate drives the blocking plate to move in the opposite direction through the blocking plate and the distribution box. When the blocking plate drives the first through hole to move, when the first through hole is connected with the second through hole and the third through hole, the ink in the distribution box flows into the printing head through the first through hole and penetrates into the ink-absorbing cotton; when the first through hole is completely staggered with the second through hole and the third through hole, the ink in the distribution box cannot flow into the printing head; the size of the connecting aperture of the first through hole and the second through hole and the third through hole can change the amount of ink flowing into the printing head through the first through hole, which is convenient for adjusting the ink replenishment amount for different printing area sizes, and realizes the function of automatic ink replenishment.

[0030] 3. The plastic product printing device described in the present invention turns on the camera through the cooperation of the third gear and the rack, and the pictures taken by the camera are uploaded to the computer. When color difference is found after computer analysis, the computer starts the electric push rod, and the electric push rod drives the vertical plate to move, which drives the rack to move through the vertical plate, and the rack drives the third gear to rotate, and the third gear drives the rotating rod and the rotating plate to rotate, and the rotating plate pushes the plastic product into the defective box; when no color difference occurs, it can continue to move to the drying box. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 is a first stereogram of the present invention;

[0033] Figure 2 is a second stereogram of the present invention;

[0034] Figure 3 is a cross-sectional view of a mixing barrel in the present invention;

[0035] Figure 4 It is a structural schematic diagram of the blocking plate in the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the filter cartridge in the present invention;

[0037] Figure 6 It is an exploded view of the sealing plate, the material distribution box and the printing head in the present invention;

[0038] Figure 7 It is a structural schematic diagram of the baffle in the present invention;

[0039] Figure 8 It is a structural schematic diagram of the drying box in the present invention;

[0040] Fig. 9 It is a schematic diagram of the structure of the bracket in the present invention;

[0041] Fig.10 It is a structural schematic diagram of the transfer plate of the present invention;

[0042] Fig.11 It is a structural schematic diagram of the guide plate in the present invention;

[0043] In the figure: 1. conveyor belt; 11. stop block; 12. roller; 2. fixed frame; 21. mixing barrel; 22. feeding hopper; 23. filter cartridge; 24. lifting plate; 25. first spring; 26. stirring rod; 27. stirring paddle; 28. first motor; 29. ​​first gear; 210. second gear; 211. telescopic tube; 212. solenoid valve; 213. liquid level gauge; 3. hydraulic cylinder; 31. mounting frame; 32. material distribution box; 33. printing head; 34. ink-absorbing cotton; 35. blocking plate; 36. moving plate; 37. two-way ball screw; 38. guide rod; 39. first gear; 310. second gear; 311. telescopic tube; 312. solenoid valve; 313. liquid level gauge; 314. hydraulic cylinder; 315. mounting frame; 32. material distribution box; 33. printing head; 34. ink-absorbing cotton; 35. blocking plate; 36. moving plate; 37. two-way ball screw; 38. guide rod; 39. first gear; 316. second gear; 317. second gear; 318. second gear; 319. second gear; 320. second gear; 321. second gear; 322. second gear; 323. second gear; 324. second gear; 325. second gear; 326. second gear; 327. second gear; 328. second gear; 329. second gear; 330. second gear; 331. second gear; 3329. second gear; 3330. second gear; 3349. second gear; 335. second gear; 3369. second gear; 337. second gear; 338. second gear; 33 Second motor; 310, first through hole; 311, second through hole; 312, third through hole; 4, baffle; 41, connecting plate; 42, side plate; 43, reciprocating screw; 44, rotating wheel; 45, belt; 46, third motor; 5, drying box; 51, heating rod; 52, fan; 53, ventilation plate; 6, bracket; 61, rotating plate; 62, rotating rod; 63, third gear; 64, push plate; 65, rack; 66, electric push rod; 67, fixed seat; 68, slide plate; 69, slide rod; 7, defective box; 71, second spring; 72, finished product box; 73, drainage plate. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0045] like Figures 1 to 11As shown, a plastic product marking device according to an embodiment of the present invention comprises: a conveyor belt 1; a fixing frame 2, fixedly connected to one end of the top of the conveyor belt 1; a marking head 33, arranged below the fixing frame 2; a bracket 6, fixedly connected to the top of the conveyor belt 1, and rotatably connected to a rotating plate 61 through a rotating rod 62; a drying box 5, fixedly connected to the other end of the top of the conveyor belt 1, for air-drying ink; a mixing barrel 21, fixedly connected to the top of the fixing frame 2; a filtering mechanism, arranged inside the mixing barrel 21; the filtering mechanism comprises a filter cartridge 23, a lifting plate 24, and a first spring 25; the top of the filter cartridge 23 is threadedly connected to the barrel cover of the mixing barrel 21; the bottom of the filter cartridge 23 is fixedly connected to the first spring 25; the top of the first spring 25 is fixedly connected to the lifting plate 24 The lifting plate 24 slides on the inner wall of the mixing barrel 21; the barrel cover of the mixing barrel 21 is connected and fixedly connected with the feeding hopper 22; the top of the fixed frame 2 is fixedly connected with the hydraulic cylinder 3; the output shaft of the hydraulic cylinder 3 is fixedly connected with the mounting frame 31; the printing head 33 is fixedly connected between the mounting frames 31; the top of the printing head 33 is fixedly connected with the dispensing box 32; the bottom of the mixing barrel 21 is connected and fixedly connected to the dispensing box 32 through the telescopic tube 211; the solenoid valve 212 is installed on the telescopic tube 211; the dispensing box 32 is fixedly connected with a liquid level meter 213; the printing head 33 is provided with an ink-absorbing cotton 34; the bottom of the mixing barrel 21 is rotatably connected with the stirring rod 26 through a rotating shaft; a plurality of stirring paddles 27 are fixedly connected to the stirring rod 26.

[0046] Because some ink particles are large and contain impurities such as fibers and iron fines, the ink quality is poor, resulting in a granular feel when printing on plastic products, and the printing effect is poor; and long-term sedimentation may lead to inconsistent concentration and stratification, affecting the appearance of the printed label;

[0047] Based on the above, when the filtering mechanism provided by the present invention is used, the plastic product is first placed on the conveyor belt 1, and is transported to the bottom of the printing head 33 through the conveyor belt 1, and is printed by the printing head 33; after the printing, the plastic products with unqualified printing are screened out by the rotating plate 61, and the plastic products with qualified printing can be dried; the ink required by the printing head 33 passes through the material distribution box 32, and when the ink in the material distribution box 32 is insufficient, the solenoid valve 212 is opened by the computer through the liquid level meter 213, and then the ink in the mixing barrel 21 can be transported to the material distribution box 32 through the telescopic tube 211, and reaches a predetermined depth, and the liquid level meter 21 3 induction controls the electromagnetic valve 212 to be closed through the computer; the ink in the mixing barrel 21 enters through the hopper 22, and when the ink passes through the filter cartridge 23, an ink filter layer is arranged on the filter cartridge 23 to filter out larger ink particles, fibers, iron fines and other impurities, wherein under the action of the ink gravity and the elastic force of the first spring 25, the lifting plate 24 reciprocates up and down to scrape off the impurities on the inner wall of the filter cartridge 23 through the lifting plate 24 to prevent the impurities from blocking the filter cartridge 23 and reducing the filtering effect, thereby achieving the effect of rapid filtering; after a period of time, the filtered ink is stirred by the stirring paddle 27 to increase the fluidity and keep the ink concentration consistent.

[0048] like Figure 3 and Figure 4 As shown, the outer wall of the distribution box 32 is fixedly connected to a second motor 39; the output shaft of the second motor 39 is fixedly connected to a bidirectional ball screw 37; both ends of the bidirectional ball screw 37 are rotatably connected to the distribution box 32 through bearings; the outer side of the bidirectional ball screw 37 is symmetrically threaded with two movable plates 36; the bottom of the movable plate 36 is fixedly connected to a sealing plate 35; the bottom of the sealing plate 35 is in contact with the bottom inner wall of the distribution box 32; two guide rods 38 are fixedly connected to the inside of the distribution box 32; and the movable plates 36 slide on the two guide rods 38.

[0049] The blocking plate 35 provided by the present invention is used to block the dispensing box 32 when in use, and the second motor 39 is turned on. The bidirectional ball screw 37 is driven to rotate by the second motor 39. Since a ball nut seat is provided at the connection between the bidirectional ball screw 37 and the movable plate 36, the radial movement of the movable plate 36 is guaranteed by the ball nut seat. The movable plate 36 is driven to move in the opposite direction by the bidirectional ball screw 37, and the movable plate 36 drives the blocking plate 35 to move in the opposite direction. The blocking plate 35 cooperates with the dispensing box 32 to achieve the function of blocking and opening the dispensing box 32.

[0050] like Figure 3 , Figure 4 and Figure 6As shown, a plurality of third through holes 312 are provided at the bottom of the material distribution box 32; a plurality of second through holes 311 are provided at the top of the printing head 33; the second through holes 311 correspond to the third through holes 312; a plurality of first through holes 310 are provided on the sealing plate 35; the first through holes 310 cooperate with the second through holes 311 and the third through holes 312 respectively.

[0051] When the first through hole 310, the second through hole 311 and the third through hole 312 provided by the present invention are in use, when the blocking plate 35 drives the first through hole 310 to move, when the first through hole 310 is connected with the second through hole 311 and the third through hole 312, the ink in the material distribution box 32 flows into the printing head 33 through the first through hole 310 and penetrates into the ink-absorbing cotton 34; when the first through hole 310 is completely staggered with the second through hole 311 and the third through hole 312, the ink in the material distribution box 32 cannot flow into the printing head 33; the size of the connecting opening between the first through hole 310 and the second through hole 311 and the third through hole 312 can change the amount of ink flowing into the printing head 33 through the first through hole 310, which is convenient for adjusting the ink replenishment amount for different printing area sizes, thereby realizing the function of automatic ink replenishment.

[0052] like Figure 3 and Figure 5 As shown, a cavity is opened on the fixing frame 2; the bottom of the stirring rod 26 extends into the cavity and is fixedly connected to a first gear 29; a second gear 210 is provided on one side of the first gear 29; the first gear 29 is meshed with the second gear 210; a first motor 28 is fixedly connected to the bottom of the fixing frame 2; the output shaft of the first motor 28 extends into the cavity and is fixedly connected to the second gear 210.

[0053] The first gear 29 and the second gear 210 provided by the present invention are convenient for driving the stirring rod 26 to rotate when in use. By turning on the first motor 28, the first motor 28 drives the second gear 210 to rotate, and the second gear 210 drives the first gear 29 to rotate, and the first gear 29 drives the stirring rod 26 and the stirring paddle 27 to rotate, thereby realizing the function of stirring and mixing the ink.

[0054] like Figure 2 and Figure 4 As shown, connecting plates 41 are fixedly connected to the two side walls of the fixing frame 2 close to the bracket 6; the connecting plates 41 are rotatably connected to reciprocating screws 43 via bearings; the bottoms of the reciprocating screws 43 are rotatably connected to the conveyor belt 1 via bearings; the reciprocating screws 43 are threadedly connected to side plates 42; and a baffle 4 is fixedly connected between the two side plates 42.

[0055] When printing, inaccurate positioning of plastic products may lead to printing errors. When the baffle 4 provided by the present invention is in use, when the plastic products are transported, the two reciprocating screws 43 are driven to rotate, and the reciprocating screws 43 drive the side plates 42 to reciprocate up and down, and the side plates 42 drive the baffle 4 to reciprocate up and down. When the baffle 4 moves and contacts the surface of the conveyor belt 1, it stops moving, which can block the plastic products being transported and determine the position of the plastic products. After printing, the baffle 4 can be driven to move upward to achieve the positioning effect of the plastic products.

[0056] like Figure 7 As shown, the top of the reciprocating screw rod 43 is fixedly connected to a rotating wheel 44; a belt 45 is sleeved between the two rotating wheels 44; an L-shaped plate is fixedly connected to the top of one of the connecting plates 41; a third motor 46 is fixedly connected to the top of the L-shaped plate; and the output shaft of the third motor 46 is fixedly connected to the top of the reciprocating screw rod 43.

[0057] The rotating wheel 44 and the belt 45 provided by the present invention are used to drive the two reciprocating screws 43 to rotate when in use. The third motor 46 is turned on, and the reciprocating screw 43 connected to the output shaft is driven to rotate by the third motor 46. The reciprocating screw 43 drives the rotating wheel 44 at the top to rotate, and the rotating wheel 44 drives the belt 45 to rotate. The belt 45 drives another rotating wheel 44 to rotate, and the rotating wheel 44 drives the connected reciprocating screw 43 to rotate, thereby achieving the effect of synchronous rotation of the two reciprocating screws 43.

[0058] like Figure 2 , Fig. 9 and Fig.10 As shown, the rotating plate 61 is fixedly connected to the end of the rotating rod 62 away from the baffle 4; the end of the rotating rod 62 close to the baffle 4 is fixedly connected to the third gear 63; the top of the bracket 6 is fixedly connected to a fixing seat 67; the top of the fixing seat 67 is fixedly connected to an electric push rod 66; the output end of the electric push rod 66 is fixedly connected to a push plate 64; one end of the push plate 64 is fixedly connected to a rack 65; the rack 65 is meshed with the third gear 63; two sliding bars 69 are fixedly connected between the two inner side walls of the fixing seat 67; two slide plates 68 are fixedly connected to the side walls of the rack 65; the slide plates 68 are all slidably connected on the slide bars 69; a defective box 7 is provided on one side of the conveyor belt 1; the defective box 7 cooperates with the rotating plate 61; and a camera is fixedly connected to the bottom of the bracket 6.

[0059] When printing labels on plastic products, sometimes there is enough ink, resulting in black spots on the printed labels; or there is less ink, resulting in the printed labels being too light in color, which requires screening. When the third gear 63 and rack 65 provided by the present invention are used, the camera is turned on, and the pictures taken by the camera are uploaded to the computer. When color difference is found after computer analysis, the computer starts the electric push rod 66, and the electric push rod 66 drives the vertical plate to move, and the rack 65 is driven by the vertical plate to move. The rack 65 drives the third gear 63 to rotate, and the third gear 63 drives the rotating rod 62 and the rotating plate 61 to rotate. The rotating plate 61 pushes the plastic products into the defective box 7; when no color difference occurs, it can continue to move to the drying box 5.

[0060] like Figure 1 and Figure 8 As shown, the drying box 5 includes a heating rod 51, a fan 52 and a ventilation plate 53; the ventilation plate 53 is fixedly connected to the bottom of the drying box 5, facing the surface of the conveyor belt 1; a heating rod 51 is provided on the top of the ventilation plate 53; the heating rod 51 is set in a spiral shape; three fans 52 are provided on the top of the ventilation plate 53; the fans 52 are all fixedly connected to the top inner wall of the drying box 5.

[0061] The ink for printing is not dry and may be scratched when mixed together, resulting in unqualified printing. When the drying box 5 provided by the present invention is in use, the fan 52 and the heating rod 51 are turned on, the heating rod 51 generates heat, and the fan 52 blows the heat to the plastic product through the ventilation plate 53 to achieve the effect of air-drying the printing. The first screening and then drying can not only increase the natural air drying time, ensure that the drying can be completed once when passing through the drying box 5, but also reduce the workload of the drying box 5.

[0062] like Figure 1 and Fig.11 As shown, one end of the conveyor belt 1 close to the drying box 5 is rotatably connected to a guide plate 73 through a rotating shaft; a finished product box 72 is provided below the guide plate 73; three second springs 71 are fixed to the bottom of the guide plate 73; and the bottom of the second spring 71 is fixed to the side wall of the finished product box 72.

[0063] Qualified plastic products fall through one end of the conveyor belt 1. When the guide plate 73 provided by the present invention is in use, the plastic products fall on the guide plate 73. Under the action of the second spring 71, the guide plate 73 rotates to shorten the distance between the plastic products and the finished product box 72, thereby preventing the plastic products from being damaged by falling directly.

[0064] like Figure 1 As shown, two limit blocks 11 are symmetrically fixed to the bottom of one end of the conveyor belt 1 close to the fixed frame 2; the limit blocks 11 are all set to be trapezoidal; the inner side walls of the limit blocks 11 are rotatably connected to multiple rollers 12 through bearings.

[0065] When the limit block 11 provided by the present invention is in use, the plastic product will automatically be limited when passing through the limit block 11 to ensure that the plastic product is printed in the center. The setting of the roller 12 reduces the friction of the plastic product, and the cooperation between the limit block 11 and the baffle 4 realizes the limiting function of the plastic product.

[0066] Working principle: First, place the plastic product on the conveyor belt 1. When the plastic product passes through the limit block 11, it will automatically limit the position to ensure that the plastic product is centered and printed. Then, turn on the third motor 46, and drive the reciprocating screw 43 connected to the output shaft to rotate through the third motor 46. The reciprocating screw 43 drives the top wheel 44 to rotate, and the wheel 44 drives the belt 45 to rotate. The belt 45 drives another wheel 44 to rotate, and the wheel 44 drives the connected reciprocating screw 43 to rotate. The reciprocating screw 43 drives the side plate 42 to reciprocate up and down, and the side plate 42 drives the baffle 4 to reciprocate up and down. When the baffle 4 moves and contacts the surface of the conveyor belt 1, it stops moving, so as to block the plastic products being transported and determine the position of the plastic products. ; It is transported to the bottom of the printing head 33 by the conveyor belt 1, and the printing head 33 is driven downward by driving the hydraulic cylinder 3 to print the label. After printing, the baffle 4 is driven to move upward. By turning on the camera, the pictures taken by the camera are uploaded to the computer. When color difference occurs after computer analysis, the computer starts the electric push rod 66, and the electric push rod 66 drives the vertical plate to move, and the vertical plate drives the rack 65 to move, and the rack 65 drives the third gear 63 to rotate, and the third gear 63 drives the rotating rod 62 and the rotating plate 61 to rotate, and the rotating plate 61 pushes the plastic product into the defective box 7; when no color difference occurs, it can continue to travel to the drying box 5 for drying; the ink required by the printing head 33 passes through the material distribution box 32. When the ink in the material distribution box 32 is insufficient, the liquid level meter 21 3 is sensed by the computer to control the electromagnetic valve 212 to open, and then the ink in the mixing barrel 21 can be transported to the material distribution box 32 through the telescopic tube 211, and when it reaches a predetermined depth, the electromagnetic valve 212 is closed by the computer through the sensing of the liquid level meter 213; the ink in the mixing barrel 21 enters through the hopper 22, and when the ink passes through the filter cartridge 23, an ink filter layer is arranged on the filter cartridge 23 to filter out larger ink particles, fibers, iron fines and other impurities, wherein under the action of the gravity of the ink and the elastic force of the first spring 25, the lifting plate 24 reciprocates up and down, and the impurities on the inner wall of the filter cartridge 23 are scraped off by the lifting plate 24 to prevent the impurities from blocking the filter cartridge 23 and reducing the filtering effect, thereby achieving a rapid filtering effect; after a period of time, the filtered ink passes through the stirring paddle 27 Stirring increases fluidity and keeps the ink concentration consistent; when ink needs to be replenished, the second motor 39 is turned on, and the bidirectional ball screw 37 is driven to rotate by the second motor 39. Since a ball nut seat is provided at the connection between the bidirectional ball screw 37 and the movable plate 36, the radial movement of the movable plate 36 is ensured by the ball nut seat, and the movable plate 36 is driven to move in the opposite direction by the bidirectional ball screw 37, and the movable plate 36 drives the blocking plate 35 to move in the opposite direction. The blocking plate 35 cooperates with the material distribution box 32, and when the blocking plate 35 drives the first through hole 310 to move, the first through hole 310 is connected with the second through hole 311 and the third through hole 312, the ink in the material distribution box 32 flows into the printing head 33 through the first through hole 310 and penetrates into the ink-absorbing cotton 34;When the first through hole 310 is completely staggered with the second through hole 311 and the third through hole 312, the ink in the material distribution box 32 cannot flow into the printing head 33; the size of the communication aperture between the first through hole 310 and the second through hole 311 and the third through hole 312 can change the amount of ink flowing into the printing head 33 through the first through hole 310, which is convenient for adjusting the amount of ink replenishment for different printing area sizes, and realizes the function of automatic ink replenishment.;

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A plastic product marking device, comprising: Conveyor belt (1); A fixed frame (2) fixedly connected to one end of the top of the conveyor belt (1); A label printing head (33) is arranged below the fixing frame (2); A bracket (6) is fixedly connected to the top of the conveyor belt (1) and is rotatably connected to a rotating plate (61) via a rotating rod (62); A drying box (5) is fixedly connected to the other end of the top of the conveyor belt (1) and is used for air-drying the ink; A mixing barrel (21) is fixedly connected to the top of the fixing frame (2); A filtering mechanism is arranged inside the mixing barrel (21); The filter mechanism comprises a filter cartridge (23), a lifting plate (24), and a first spring (25); the top of the filter cartridge (23) is threadedly connected to the barrel cover of the mixing barrel (21); the bottom of the filter cartridge (23) is fixedly connected to the first spring (25); the top of the first spring (25) is fixedly connected to the lifting plate (24), and the lifting plate (24) slides on the inner wall of the mixing barrel (21); the barrel cover of the mixing barrel (21) is connected and fixedly connected to the feed hopper (22); A hydraulic cylinder (3) is fixedly connected to the top of the fixing frame (2); an output shaft of the hydraulic cylinder (3) is fixedly connected to a mounting frame (31); the marking head (33) is fixedly connected between the mounting frames (31); a material distribution box (32) is fixedly connected to the top of the marking head (33); the bottom of the mixing barrel (21) is connected and fixedly connected to the material distribution box (32) via a telescopic tube (211); a solenoid valve (212) is installed on the telescopic tube (211); a liquid level meter (213) is fixedly connected to the material distribution box (32); an ink-absorbing cotton (34) is arranged in the marking head (33); The bottom of the mixing barrel (21) is rotatably connected to a stirring rod (26) via a rotating shaft; a plurality of stirring paddles (27) are fixedly connected to the stirring rod (26); The outer wall of the material distribution box (32) is fixedly connected to a second motor (39); the output shaft of the second motor (39) is fixedly connected to a bidirectional ball screw (37); both ends of the bidirectional ball screw (37) are rotatably connected to the material distribution box (32) via bearings; the outer side of the bidirectional ball screw (37) is symmetrically threadedly connected to two moving plates (36); the bottom of the moving plates (36) is fixedly connected to a blocking plate (35); the bottom of the blocking plate (35) is in contact with the bottom inner wall of the material distribution box (32); two guide rods (38) are fixedly connected to the inside of the material distribution box (32); the moving plates (36) slide on the two guide rods (38); The bottom of the material distribution box (32) is provided with a plurality of third through holes (312); the top of the marking head (33) is provided with a plurality of second through holes (311); the second through holes (311) correspond to the third through holes (312); the blocking plate (35) is provided with a plurality of first through holes (310); the first through holes (310) respectively cooperate with the second through holes (311) and the third through holes (312).

2. A plastic product marking device according to claim 1, characterized in that: The fixing frame (2) is provided with a cavity; the bottom of the stirring rod (26) extends into the cavity and is fixedly connected to a first gear (29); a second gear (210) is provided on one side of the first gear (29); the first gear (29) is meshed with the second gear (210); a first motor (28) is fixedly connected to the bottom of the fixing frame (2); an output shaft of the first motor (28) extends into the cavity and is fixedly connected to the second gear (210).

3. A plastic product marking device according to claim 2, characterized in that: A connecting plate (41) is fixedly connected to both side walls of the fixing frame (2) close to the bracket (6); a reciprocating screw rod (43) is rotatably connected to the connecting plate (41) via a bearing; the bottom of the reciprocating screw rod (43) is rotatably connected to the conveyor belt (1) via a bearing; a side plate (42) is threadedly connected to the reciprocating screw rod (43); and a baffle plate (4) is fixedly connected between the two side plates (42).

4. A plastic product marking device according to claim 3, characterized in that: The top ends of the reciprocating screw rods (43) are fixedly connected to rotating wheels (44); a belt (45) is sleeved between the two rotating wheels (44); an L-shaped plate is fixedly connected to the top of one of the connecting plates (41); a third motor (46) is fixedly connected to the top of the L-shaped plate; and an output shaft of the third motor (46) is fixedly connected to the top of the reciprocating screw rod (43).

5. A plastic product marking device according to claim 4, characterized in that: The rotating plate (61) is fixedly connected to the end of the rotating rod (62) away from the baffle (4); the end of the rotating rod (62) close to the baffle (4) is fixedly connected to the third gear (63); the top of the bracket (6) is fixedly connected to a fixed seat (67); the top of the fixed seat (67) is fixedly connected to an electric push rod (66); the output end of the electric push rod (66) is fixedly connected to a push plate (64); one end of the push plate (64) is fixedly connected to a rack (65); the rack (65) is meshed with the third gear (63); two sliding bars (69) are fixedly connected between the two inner side walls of the fixed seat (67); two sliding plates (68) are fixedly connected to the side wall of the rack (65); the sliding plates (68) are all slidably connected to the sliding bars (69); a defective box (7) is provided on one side of the conveyor belt (1); the defective box (7) cooperates with the rotating plate (61); and a camera is fixedly connected to the bottom of the bracket (6).

6. A plastic product marking device according to claim 5, characterized in that: The drying box (5) comprises a heating rod (51), a fan (52) and a ventilation plate (53); the ventilation plate (53) is fixedly connected to the bottom of the drying box (5) and is opposite to the surface of the conveyor belt (1); a heating rod (51) is provided on the top of the ventilation plate (53); the heating rod (51) is arranged in a spiral shape; three fans (52) are provided on the top of the ventilation plate (53); the fans (52) are all fixedly connected to the top inner wall of the drying box (5).

7. A plastic product marking device according to claim 6, characterized in that: One end of the conveyor belt (1) close to the drying box (5) is rotatably connected to a guide plate (73) via a rotating shaft; a finished product box (72) is provided below the guide plate (73); three second springs (71) are fixedly connected to the bottom of the guide plate (73); and the bottom of the second spring (71) is fixedly connected to the side wall of the finished product box (72).

8. A plastic product marking device according to claim 7, characterized in that: Two limit blocks (11) are symmetrically fixedly connected to the bottom of one end of the conveyor belt (1) close to the fixed frame (2); the limit blocks (11) are all designed to be trapezoidal; and the inner side walls of the limit blocks (11) are rotatably connected to a plurality of rollers (12) via bearings.

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