Feeding system of full-automatic plastic tableware packaging production line

Abstract

The invention provides a feeding system of a full-automatic plastic tableware packaging production line, and belongs to the technical field of plastic product packaging. The feeding system comprises a conveyor and a discharging mechanism, the discharging mechanism comprises an inclined sliding plate and a plurality of jigs capable of containing different kinds of tableware, a stock bin is fixed to the upper end of the inclined sliding plate, a plurality of discharging sliding ways are arranged at the lower end of the inclined sliding plate, the interior of the stock bin is divided into a plurality of installation grooves through a plurality of partition plates, and the jigs are fixed in the installation grooves. The discharging slideways are in one-to-one correspondence with the mounting grooves, square discharging frames are arranged at outlets of the discharging slideways, and the stock bin is further provided with a circulating grabbing assembly which adsorbs the tableware in the jigs one by one and transfers the tableware to the discharging slideways. Different tableware is discharged in order in the transfer process of the circulating grabbing assembly, the tableware with knives, forks and spoons slide into respective rails at intervals, finally all the tableware fall into the same square fence from the square discharging frame and are neatly and transversely arranged and stacked to be combined into a whole set of tableware, and then the whole set of tableware enters a packaging machine to be heated and sealed.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic product packaging and relates to a feeding system of a fully automatic packaging production line for plastic tableware. Background Art

[0002] Most of the plastic tableware such as knives, forks and spoons are disposable, especially in the current developed take-out industry. These plastic tableware are injection molded and packaged in plastic film bags, which has low manufacturing costs. Some factories still rely on manual unloading. Workers need to take knives, forks and spoons from multiple storage boxes and put them on the same conveyor. The conveyor belt then transfers them to the plastic film of the packaging host. The packaging host finally heats and seals them to complete the packaging. The conveyor belt at the end transports the packaged products to the assembly line workbench, and workers pack the products according to the counting and packaging specifications. For this reason, people have designed an automatic unloading mechanism for knives, forks and spoons.

[0003] For example, the invention patent with Chinese patent number [201510077920.8] discloses a feeding device for a knife, fork and spoon packaging machine, including a feeding guide rail, a feeding guide rail, a feeding mechanism and a conveying mechanism. The feeding guide rail is used to place materials, the feeding guide rail is connected to the feeding guide rail, and the feeding mechanism is used to push the materials along the feeding guide rail. The feeding guide rail includes an arc-shaped transition portion and a guiding portion. The guiding portion is U-shaped, including a first vertical portion, an arc-shaped curved portion and a second vertical portion. The arc-shaped transition portion is connected to the feeding guide rail, and the curved portion is located at the bottom to connect the first vertical portion and the second vertical portion. The first vertical portion is connected to the arc-shaped transition portion, and the end of the second vertical portion is open. When unloading, the spoons are first arranged and stacked on the unloading guide rail. The unloading guide rail adopts a straight inclined shape. The spoons will enter the U-shaped guide part through the arc transition part, and then the spoons will be driven by the feeding mechanism to feed downward along the first vertical part of the guide part, and then pass through the arc bending part and feed upward along the second vertical part, slowly advancing, and feeding continuously in sequence until the unloading guide rail is full. The spoons at the opening of the second vertical part will be sensed by the detection photoeye, and the feeding mechanism will be controlled to stop feeding. If there is a vacancy in the unloading guide rail, the spoons in the second vertical part will drop, and the detection photoeye will restart to control the material to continue feeding. Therefore, the above-mentioned spoons after feeding will eventually stay at the opening of the second vertical part. This section is in an up and down stacking state. When it is transported by the conveying mechanism, multiple materials will not be unloaded at the same time. They will only be transported one by one to the packaging positioning position for packaging under the action of the conveying mechanism. This unloading device has a complex structure, a slow unloading speed, and cannot unload materials at the same time, and the production efficiency is relatively low.

[0004] At present, the most widely used fully automatic packaging production line for plastic tableware is the four-in-one fully automatic four-side sealed pillow packaging machine for disposable tableware. The Chinese patent number is [201721327998.1]. The patent introduces an automatic unloading system, which includes a paper towel unloading machine, a chopstick unloading machine, a toothpick unloading machine, and a spoon unloading machine. The paper towel unloading machine is installed on one side of the conveyor, the chopstick unloading machine is installed above the conveyor, the toothpick unloading machine is installed on one side of the spoon unloading machine, the spoon unloading machine is installed on the right side of the conveyor, the packaging host is installed on the other side of the conveyor, and the assembly line workbench is installed on one side of the packaging host. The conveyor is connected with the paper towel unloading machine, the chopstick unloading machine, the toothpick unloading machine, the spoon unloading machine, and the packaging host. This automatic unloading system occupies a large area and has high equipment costs. Each tableware corresponds to a unloading machine, and multiple unloading machines are arranged in a line along the assembly line. In addition, when replacing tableware of different types and sizes, complex adjustments are required, such as the height position of the spoon jig and the distance between the spoon jig and the turntable robot. These all need to be adjusted manually, and the adjustment time is long, high precision is required, and the applicability is low. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a feeding system for a fully automatic packaging production line for plastic tableware. Different types of tableware are integrated into one unloading mechanism. Multiple types of tableware can be unloaded in sequence, and knives, forks and spoons of different sizes and shapes can be adjusted. The adjustment speed is fast and convenient, and it is suitable for plastic tableware of various sizes and types.

[0006] The object of the present invention can be achieved through the following technical solutions: a feeding system for a fully automatic packaging production line for plastic tableware, comprising a conveyor and a unloading mechanism, characterized in that the unloading mechanism comprises an inclined slide plate, a plurality of jigs that can respectively place different types of tableware, a material bin is fixed at the upper end of the inclined slide plate, a plurality of discharge chutes are provided at the lower end of the inclined slide plate, the material bin is divided into a plurality of mounting grooves by a plurality of partitions, the jigs are fixed in the mounting grooves, the discharge chutes correspond to the mounting grooves one by one, a square discharge frame is provided at the outlet of the discharge chute, and a circulating grabbing assembly is also provided on the material bin for adsorbing and transferring the tableware in a plurality of jigs one by one to the discharge chute; the conveyor comprises a feeding rack and an annular conveyor belt, a column is fixed on one side of the feeding rack, the inclined slide plate is fixed on the upper end of the column, a square fence for accommodating tableware is fixed on the annular conveyor belt, and the square discharge frame is located above the annular output belt.

[0007] Plastic tableware such as knives, forks and spoons are arranged in rows and placed into their respective fixtures. The circulating grabbing component transfers the various tableware to the discharging chute one by one in an orderly manner. The tableware falls from the square discharging frame into the square fence of the circular conveyor belt. After a set of tableware is completed, it moves forward one grid. The circular conveyor belt then sends the entire set of tableware to the packaging machine.

[0008] Furthermore, the circulating material grabbing assembly includes a motor, an air pump, an adsorption spindle and an adsorption tube. The adsorption spindle is rotatably connected to the front end of the silo. The adsorption spindle is a hollow tube with one end closed. The motor and the air pump are respectively fixed on both sides of the silo. The motor drives the adsorption spindle to rotate through a gear set. The air pump is rotatably connected and communicated with the other end of the adsorption spindle through a connecting head. A number of adjusting sleeves are slidably sleeved on the adsorption spindle. The adsorption tube is inserted into the side of the adjusting sleeve and communicated with the adjusting sleeve. A locking bolt that can fix the adjusting sleeve on the adsorption spindle is threaded on the other side of the adjusting sleeve.

[0009] The adjustment sleeve can slide and rotate relative to the adsorption spindle, and the two can be tightly locked by tightening the locking bolt. The angle of each adjustment sleeve can be adjusted as needed. In order to avoid multiple tableware being unloaded at the same time, causing them to slide into the square discharge frame together and cause blockage, the angles of each adjustment sleeve and the adsorption tube can be staggered, so that when the adsorption spindle rotates, the time for each tableware to fall on the discharge chute can be staggered. The adsorption spindle rotates one circle, and the tableware in each fixture is grabbed and placed into the discharge chute. Therefore, after waiting for a set of tableware to slide into the same square fence, the circular conveyor belt moves forward one grid, and the next empty square fence enters directly below the square discharge frame.

[0010] Furthermore, the adsorption main shaft has a plurality of strip-shaped air suction holes arranged transversely along the axial direction, and the adjusting sleeve has a strip-shaped connecting hole arranged vertically, and both ends of the connecting hole are respectively connected to the air suction hole and the adsorption tube.

[0011] A strip-shaped suction hole is provided so that when the adjusting sleeve moves a short distance along the axial direction, the adsorption main shaft and the adsorption tube can always be connected; a strip-shaped connecting hole is provided so that when the adjusting sleeve rotates around the adsorption main shaft at a small angle, the adsorption main shaft and the adsorption tube can always be connected.

[0012] Furthermore, the inlet end of the connector is connected to the suction port of the vacuum pump, and the outlet end of the connector is embedded with a sealed bearing, the inner ring of which is fixedly sleeved on the adsorption main shaft and rotates synchronously with the adsorption main shaft. The function of the connector is to allow the vacuum pump to inhale when the adsorption main shaft rotates, and the sealed bearing improves the sealing of the connection when the adsorption main shaft rotates.

[0013] Furthermore, the adsorption tube is also provided with a swing valve which automatically controls the opening and closing of the adsorption tube. The swing valve includes a valve body connected to the adsorption tube and a valve stem which is rotatably connected to the valve body. A return spring is connected to the inner end of the valve stem, and the end of the return spring is connected to the valve body. When the valve stem swings, it opens or closes the valve body. A lifting groove is opened on the partition plate, and a height adjustment screw is rotatably connected in the lifting groove. A switch baffle is slidably provided in the lifting groove, and a threaded hole which is threadedly connected to the height adjustment screw is opened at one end of the switch baffle. An adjustment handle is fixedly connected to the upper end of the height adjustment screw. The other end of the switch baffle extends out of the lifting groove and can push the valve stem to swing when the adsorption tube rotates.

[0014] The motor drives the adsorption spindle to rotate, and the adsorption spindle rotates with the adsorption tube to the front end of the fixture. The adsorption tube continues to rotate downward. When the distance between the front end of the adsorption tube and the tableware just fits or reaches the easiest adsorption point, the valve stem on the swing valve will be blocked by the switch baffle, thereby opening the valve. At this time, the adsorption tube quickly adsorbs the tableware in front. As the adsorption spindle continues to rotate, the strong suction force of the adsorption tube pulls the tableware out of the fixture. The adsorption tube continues to rotate to allow the valve stem to pass the switch baffle. The valve stem returns to its original position under the action of the reset spring, and the swing valve closes the adsorption tube. At this time, the tableware falls from the adsorption tube into the discharge chute.

[0015] Turn the adjustment handle to rotate the height adjustment screw to drive the switch baffle to rise and fall. It is used to adjust the height of the switch baffle to change the opening and closing time of the adsorption tube. For example, if some tableware needs to be adsorbed on the upper end, the switch baffle is raised to open the swing valve in advance; if some tableware needs to be adsorbed on the lower end, the switch baffle is lowered to delay the opening time of the swing valve.

[0016] As another solution, the adsorption tube is also provided with a magnetic induction valve which automatically controls the opening and closing of the adsorption tube. A lifting groove is provided on the partition plate, and a height adjustment screw is rotatably connected in the lifting groove. A switch baffle is slidably provided in the lifting groove, and a threaded hole which is threadedly connected to the height adjustment screw is provided at one end of the switch baffle. The outer end of the switch baffle extends out of the lifting groove and a magnet is fixed on the outer end. When the adsorption tube rotates to the switch baffle, the magnetic induction valve senses the magnetic field of the magnet and opens the adsorption tube.

[0017] The magnetic induction valve is simpler than the swing valve. When the adsorption tube rotates with the magnetic induction valve to the vicinity of the magnetic block, the magnetic induction valve automatically opens. When it moves away from the magnetic block, the magnetic induction valve automatically closes.

[0018] Furthermore, the jig is in the shape of an elongated strip, and is provided with a material storage chute that matches the contour of the tableware, and an elastic material blocking rod is fixed to the front end of the jig. The material blocking rod can be a rubber rod or a wire, and because the thickness of the tableware is relatively thin and the slope of the inclined slide plate is relatively large, the tableware automatically slides out of the front end of the material storage chute of the jig under the action of gravity, and can be blocked by the material blocking rod without falling, but when the suction port of the adsorption tube faces the tableware, the tableware will be adsorbed and pulled away from the jig, and the elastic material blocking rod will be pushed outward, and the tableware will still be adsorbed by the adsorption tube after leaving the jig and will be led to the discharging chute, and when the adsorption tube is away from the switch baffle, the adsorption tube will be automatically closed, and the tableware will fall into the discharging chute after losing the adsorption force, and slide into the square discharging frame along the discharging chute.

[0019] Furthermore, a locking screw is fixed on the lower end surface of the fixture, and a long strip-shaped adjustment hole is fixed in the mounting groove. The locking screw is inserted into the adjustment hole and is locked and fixed by a nut. The locking screw can slide back and forth in the adjustment hole, and the front and rear position of the fixture can be finely adjusted so that the tableware in the front row is closest to the adsorption tube, so that tableware of different sizes and thicknesses can be firmly adsorbed by the adsorption tube.

[0020] Furthermore, an inlet is opened on one side of the square discharging frame, and the inlet is connected to the outlet of the discharging slideway.

[0021] Furthermore, the discharging chute includes a straight chute and an inclined chute connected to the rear end of the straight chute, and the angle between the inclined chute and the straight chute is 120° to 150°. After the tableware is transferred from the circulating material grabbing assembly to the discharging chute, it first slides vertically down along the straight chute, slides into the inclined chute, and then slides horizontally and obliquely down until it slides into the square discharging frame. Therefore, when the tableware falls from the square discharging frame to the square fence, it falls horizontally and will not fall vertically and get stuck or tilt and fall outside the square fence.

[0022] Compared with the existing technology, the feeding system of this plastic tableware automatic packaging production line has the following advantages:

[0023] 1. Different tableware is unloaded in an orderly manner during the transfer of the circulating grabbing component. Knives, forks and spoons slide into their respective tracks at intervals, and finally fall from the square discharge frame into the same square fence, where they are neatly arranged and stacked horizontally to form a complete set of tableware, and then enter the packaging machine for heating and sealing.

[0024] 2. The adjusting sleeve can be rotated so that the angles between the adsorption tubes are staggered. Instead, a variety of tableware are adsorbed on their respective adsorption tubes in an orderly manner and discharged one by one. In this way, they will not be discharged together, causing them to collide with each other after sliding out of the discharge chute and blocking the square discharge frame.

[0025] 3. The circulating grabbing component can slide the adjustment sleeve horizontally along the adsorption main axis to facilitate the adjustment of the adsorption point of the adsorption tube in the horizontal direction and accurately adsorb tableware of various sizes and shapes.

[0026] 4. The circulating material grabbing component can adjust the height of the switch baffle, which is convenient for adjusting the adsorption point of the adsorption tube in the longitudinal direction, and accurately adsorbing tableware of various sizes and shapes.

[0027] 5. The front and rear positions of the fixture can be adjusted so that the distance between the tableware in the front row and the adsorption tube reaches the optimal adsorption distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the feeding system of the fully automatic packaging production line for plastic tableware.

[0029] Figure 2 It is a three-dimensional structural diagram of the blanking mechanism.

[0030] Figure 3 It is a structural diagram of an inclined sliding plate.

[0031] Figure 4 It is a structural schematic diagram of the circulating material grabbing component.

[0032] Figure 5 It is a cross-sectional view of the circulating grab assembly.

[0033] Figure 6 It is a structural schematic diagram of the adsorption spindle.

[0034] Figure 7 It is a schematic diagram of the internal structure of the swing valve.

[0035] Figure 8 It is a structural diagram of the fixture.

[0036] Fig. 9 It is a structural schematic diagram of the switch baffle.

[0037] Fig.10 It is a structural diagram of the conveyor.

[0038] In the figure, 1, inclined slide plate; 2, silo; 21, partition; 211, lifting slot; 212, height adjustment screw; 213, switch baffle; 214, adjustment handle; 215, threaded hole; 23, mounting slot; 231, adjustment hole; 24, fixture; 241, storage chute; 242, blocking rod; 243, locking screw; 3, discharge slide; 31, straight slide; 32, inclined slide; 4, circulating grab assembly ; 41. Motor; 42. Vacuum pump; 43. Adsorption spindle; 44. Adsorption tube; 45. Gear set; 46. Adjustment sleeve; 47. Swing valve; 471. Valve body; 472. Valve stem; 473. Return spring; 48. Suction hole; 49. Connecting hole; 410. Connecting head; 411. Locking bolt; 5. Feeding rack; 6. Ring conveyor belt; 61. Square fence; 7. Column; 8. Square discharge frame. DETAILED DESCRIPTION

[0039] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0040] like Figure 1-3 As shown, the feeding system of the fully automatic packaging production line for plastic tableware includes a conveyor and a unloading mechanism, wherein the unloading mechanism includes an inclined slide plate 1, a plurality of jigs 24 for placing different types of tableware respectively, a silo 2 is fixed at the upper end of the inclined slide plate 1, a plurality of discharge chutes 3 are provided at the lower end of the inclined slide plate 1, the silo 2 is divided into a plurality of mounting grooves 23 by a plurality of partitions 21, the jigs 24 are fixed in the mounting grooves 23, the discharge chutes 3 correspond to the mounting grooves 23 one by one, a square discharge frame 8 is provided at the outlet of the discharge chute 3, and a circulating grasping component 4 is also provided on the silo 2 for adsorbing the tableware in the plurality of jigs 24 one by one and transferring them to the discharge chute 3.

[0041] like Fig.10 As shown, the conveyor includes a feeding rack 5 and an annular conveyor belt 6, a column 7 is fixed to one side of the feeding rack 5, an inclined slide 1 is fixed to the upper end of the column 7, a square fence 61 for accommodating tableware is fixed on the annular conveyor belt 6, and a square discharge frame 8 is located above the annular conveyor belt 6.

[0042] Specifically, if Figure 4-5As shown, the circulating material grabbing assembly 4 includes a motor 41, an air pump 42, an adsorption spindle 43 and an adsorption tube 44. The adsorption spindle 43 is rotatably connected to the front end of the silo 2. The adsorption spindle 43 is a hollow tube with one end closed. The motor 41 and the air pump 42 are respectively fixed on both sides of the silo 2. The closed end of the adsorption spindle 43 and the output shaft of the motor 41 are powered by a gear set 45. The motor 41 drives the adsorption spindle 43 to rotate. The air pump 42 is rotatably connected and communicated with the open end of the adsorption spindle 43 through a connector 410. A plurality of adjusting sleeves 46 are slidably sleeved on the adsorption spindle 43. The adsorption tube 44 is inserted into the side of the adjusting sleeve 46 and communicated with the adjusting sleeve 46. A locking bolt 411 that can fix the adjusting sleeve 46 on the adsorption spindle 43 is threadedly connected on the other side of the adjusting sleeve 46.

[0043] The inlet end of the connector 410 is connected to the suction port of the vacuum pump 42, and a sealed bearing is embedded in the outlet end of the connector 410. The inner ring of the sealed bearing is fixedly sleeved on the adsorption main shaft 43 and rotates synchronously with the adsorption main shaft 43. The function of the connector 410 is to allow the vacuum pump 42 to suction air when the adsorption main shaft 43 rotates, and the sealed bearing improves the sealing of the connection when the adsorption main shaft 43 rotates.

[0044] The adjustment sleeve 46 can slide and rotate relative to the adsorption main shaft 43, and the two can be tightly locked by tightening the locking bolt 411. The angle of each adjustment sleeve 46 can be adjusted as needed. In order to avoid multiple tableware being discharged together, causing them to slide into the square discharge frame 8 together and cause blockage, the angles of each adjustment sleeve 46 and the adsorption tube 44 are staggered, so that when the adsorption main shaft 43 rotates, the time for each tableware to fall on the discharge chute 3 can be staggered. The adsorption main shaft 43 rotates one circle, and the tableware in each fixture 24 is grabbed and placed into the discharge chute 3. Therefore, after waiting for a set of tableware to slide into the same square fence 61, the circular conveyor belt 6 moves forward one grid, and the next empty square fence 61 enters directly below the square discharge frame 8.

[0045] like Figure 6 As shown, the adsorption main shaft 43 has a plurality of laterally arranged strip-shaped air suction holes 48 along the axial direction, and the adjusting sleeve 46 has a vertically arranged strip-shaped connecting hole 49, and both ends of the connecting hole 49 are respectively connected to the air suction hole 48 and the adsorption tube 44.

[0046] A strip-shaped suction hole 48 is provided so that when the adjusting sleeve 46 moves a short distance along the axial direction, the adsorption main shaft 43 and the adsorption tube 44 can always be connected; a strip-shaped connecting hole 49 is provided so that when the adjusting sleeve 46 rotates around the adsorption main shaft 43 at a small angle, the adsorption main shaft 43 and the adsorption tube 44 can always be connected.

[0047] like Figure 7 , Fig. 9As shown, the adsorption tube 44 is also provided with a swing valve 47 for automatically controlling the opening and closing of the adsorption tube 44. The swing valve 47 includes a valve body 471 connected to the adsorption tube 44 and a valve stem 472 rotatably connected to the valve body 471. The inner end of the valve stem 472 is connected to a return spring 473, and the end of the return spring 473 is connected to the valve body 471. When the valve stem 472 swings, it opens or closes the valve body 471. A lifting groove 211 is opened on the partition plate 21. A height adjustment screw 212 is rotatably connected in the lifting groove 211. A switch baffle 213 is slidably provided in the lifting groove 211. A threaded hole 215 threadedly connected to the height adjustment screw 212 is opened at one end of the switch baffle 213. An adjusting handle 214 is fixedly connected to the upper end of the height adjustment screw 212. The other end of the switch baffle 213 extends out of the lifting groove 211 and can push the valve stem 472 to swing when the adsorption tube 44 rotates.

[0048] The motor 41 drives the adsorption spindle 43 to rotate, and the adsorption spindle 43 rotates with the adsorption tube 44 to the front end of the fixture 24. The adsorption tube 44 continues to rotate downward. When the distance between the front end of the adsorption tube 44 and the tableware is just in contact or reaches the easiest adsorption point, the valve stem 472 on the swing valve 47 will be blocked by the switch baffle 213, thereby opening the valve. At this time, the adsorption tube 44 quickly adsorbs the tableware in front. As the adsorption spindle 43 continues to rotate, the strong suction force of the adsorption tube 44 pulls the tableware out of the fixture 24. The adsorption tube 44 continues to rotate to allow the valve stem 472 to pass over the switch baffle 213. Under the action of the reset spring 473, the valve stem 472 returns to its original position, and the swing valve 47 closes the adsorption tube 44. At this time, the tableware falls from the adsorption tube 44 into the discharge chute 3.

[0049] The adjusting handle 214 is turned to rotate the height adjusting screw 212 to drive the switch baffle 213 to rise and fall, and the height of the switch baffle 213 is adjusted to change the opening and closing time of the adsorption tube 44. For example, if some tableware needs to be adsorbed on the upper end, the switch baffle 213 is raised to open the swing valve 47 in advance; if some tableware needs to be adsorbed on the lower end, the switch baffle 213 is lowered to delay the opening time of the swing valve 47.

[0050] Of course, the swing valve 47 can be replaced by a magnetic induction valve. In this case, it is necessary to install a magnetic induction valve on the adsorption tube 44 to automatically control the opening and closing of the adsorption tube 44. A lifting groove 211 is provided on the partition 21. A height adjustment screw 212 is rotatably connected in the lifting groove 211. A switch baffle 213 is slidably provided in the lifting groove 211. A threaded hole 215 threadedly connected to the height adjustment screw 212 is provided at one end of the switch baffle 213. The outer end of the switch baffle 213 extends out of the lifting groove 211 and a magnetic block is fixed on the outer end. When the adsorption tube 44 rotates to the switch baffle 213, the magnetic induction valve senses the magnetic field of the magnetic block and opens the adsorption tube 44.

[0051] The magnetic induction valve is simpler than the swing valve 47. When the adsorption tube 44 rotates with the magnetic induction valve to the vicinity of the magnetic block, the magnetic induction valve automatically opens, and when it moves away from the magnetic block, the magnetic induction valve automatically closes.

[0052] like Figure 8 As shown, the jig 24 is in the shape of a long strip, and a storage chute 231 matching the outline of the tableware is opened on the jig 24, and an elastic blocking rod 242 is fixed to the front end of the jig 24. The blocking rod 242 can be a rubber rod or a wire. Since the thickness of the tableware is relatively thin and the slope of the inclined slide 1 is relatively large, the tableware automatically slides out of the front end of the storage chute 231 of the jig 24 under the action of gravity. Due to the blocking of the blocking rod 242, it can be stopped and does not fall. However, when the suction port of the adsorption tube 44 faces the tableware, the tableware will be adsorbed and pulled away from the jig 24, and the elastic blocking rod 242 will be pushed outward. After the tableware is separated from the jig 24, it is still adsorbed by the adsorption tube 44 and is led to the discharging chute 3. When the adsorption tube 44 is away from the switch baffle 213, the adsorption tube 44 is automatically closed, and the tableware loses the adsorption force and falls into the discharging chute 3, and slides into the square discharging frame 8 along the discharging chute 3.

[0053] A locking screw 243 is fixed to the lower end surface of the jig 24, and a long strip-shaped adjustment hole 231 is fixed in the mounting groove 23. The locking screw 243 is inserted into the adjustment hole 231 and is locked and fixed by a nut. The jig 24 can be disassembled and replaced according to production requirements, which is convenient for the production of different types of tableware. The locking screw 243 can slide back and forth in the adjustment hole 231, and the front and rear position of the jig 24 can be finely adjusted so that the tableware in the front row is closest to the adsorption tube 44, so that tableware of different sizes and thicknesses can be firmly sucked by the adsorption tube 44.

[0054] An inlet is provided on one side of the square discharging frame 8, and the inlet is connected to the outlet of the discharging chute 3. The discharging chute 3 includes a straight chute 31 and an inclined chute 32 connected to the rear end of the straight chute 31, and the angle between the inclined chute 32 and the straight chute 31 is 120° to 150°. After the tableware is transferred from the circulating grasping assembly 4 to the discharging chute 3, it starts to slide vertically downward along the straight chute 31, and after sliding into the inclined chute 32, it turns to slide horizontally and obliquely downward until it slides into the square discharging frame 8. Therefore, when the tableware falls from the square discharging frame 8 to the square fence 61, it falls horizontally and will not fall vertically and get stuck or tilt to fall outside the square fence 61.

[0055] Detailed process: Put the plastic tableware such as knives, forks, spoons, etc. into their respective jigs 24 in an orderly manner. The storage chute 231 on the jig 24 matches the contour of the tableware. After the jig 24 is installed on the inclined slide 1, the tableware will automatically slide to the front end due to gravity, and the blocking rod 242 at the front end of the jig 24 will prevent the tableware from sliding out of the storage chute 231. During operation, the motor 41, the vacuum pump 42 and the circular conveyor belt 6 are started, the motor 41 drives the adsorption spindle 43 to rotate, and the adsorption tube 44 rotates toward the fixture 24. When the valve stem 472 on the swing valve 47 is blocked by the switch baffle 213, the swing valve 47 opens the adsorption tube 44, and the air paths of the vacuum pump 42, the adsorption spindle 43 and the adsorption tube 44 are connected. The front end of the adsorption tube 44 adsorbs the tableware, and the adsorption tube 44 continues to rotate to bring the tableware out of the storage chute 231. After the valve stem 472 passes the switch baffle 213, the swing valve 47 is connected, and the tableware automatically falls onto the discharging chute, slides from the discharging chute to the square discharging frame 8, and finally falls into the square fence 61 of the circular conveyor belt 6. After several kinds of tableware fall in turn, the square fence 61 moves forward one grid after a whole set of tableware is gathered. The circular conveyor belt 6 finally sends the whole set of tableware to the packaging machine, which performs heat-sealed packaging.

[0056] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A feeding system for a fully automatic packaging production line for plastic tableware, comprising a conveyor and a feeding mechanism, characterized in that: The unloading mechanism comprises an inclined slide plate (1) and a plurality of jigs (24) for placing different types of tableware respectively. A material bin (2) is fixed at the upper end of the inclined slide plate (1). A plurality of discharge chutes (3) are provided at the lower end of the inclined slide plate (1). The material bin (2) is divided into a plurality of mounting grooves (23) by a plurality of partitions (21). The jigs (24) are fixed in the mounting grooves (23). The discharge chutes (3) correspond to the mounting grooves (23) one by one. A square-shaped A discharge frame (8), the silo (2) is also provided with a circulating material grabbing assembly (4) for sucking and transferring tableware in a plurality of jigs (24) one by one to a discharge chute (3); the conveyor comprises a feeding frame (5) and an annular conveyor belt (6), a column (7) is fixed on one side of the feeding frame (5), an inclined slide (1) is fixed on the upper end of the column (7), a square fence (61) for accommodating tableware is fixed on the annular conveyor belt (6), and the square discharge frame (8) is located above the annular output belt.

2. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 1 is characterized in that: The circulating material grabbing assembly (4) comprises a motor (41), an air pump (42), an adsorption main shaft (43) and an adsorption tube (44). The adsorption main shaft (43) is rotatably connected to the front end of the silo (2). The adsorption main shaft (43) is a hollow tube with one end closed. The motor (41) and the air pump (42) are respectively fixed on both sides of the silo (2). The motor (41) drives the adsorption main shaft (43) to rotate through a gear set (45). The air pump (42) is rotatably connected and communicated with the other end of the adsorption main shaft (43) through a connector (410). A plurality of adjustment sleeves (46) are slidably sleeved on the adsorption main shaft (43). The adsorption tube (44) is inserted into the side of the adjustment sleeve (46) and communicated with the adjustment sleeve (46). A locking bolt (411) capable of fixing the adjustment sleeve (46) on the adsorption main shaft (43) is threadedly connected on the other side of the adjustment sleeve (46).

3. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 2 is characterized in that: The adsorption main shaft (43) is provided with a plurality of strip-shaped air suction holes (48) arranged transversely along the axial direction, and the adjusting sleeve (46) is provided with a strip-shaped connecting hole (49) arranged vertically, and the two ends of the connecting hole (49) are respectively connected with the air suction hole (48) and the adsorption tube (44).

4. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 3 is characterized in that: The inlet end of the connector (410) is connected to the air inlet of the vacuum pump (42), and the outlet end of the connector (410) is embedded with a sealing bearing, the inner ring of which is fixedly sleeved on the adsorption main shaft (43) and rotates synchronously with the adsorption main shaft (43).

5. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 4 is characterized in that: The adsorption tube (44) is also provided with a swing valve (47) for automatically controlling the opening and closing of the adsorption tube (44). The swing valve (47) includes a valve body (471) connected to the adsorption tube (44) and a valve stem (472) rotatably connected to the valve body (471). The inner end of the valve stem (472) is connected to a return spring (473), and the end of the return spring (473) is connected to the valve body (471). When the valve stem (472) swings, it opens or closes the valve body (471). A lifting spring (473) is provided on the partition plate (21). A height adjustment screw (212) is rotatably connected in the lifting groove (211), a switch baffle (213) is slidably provided in the lifting groove (211), a threaded hole (215) threadedly connected to the height adjustment screw (212) is opened at one end of the switch baffle (213), an adjustment handle (214) is fixedly connected to the upper end of the height adjustment screw (212), and the other end of the switch baffle (213) extends out of the lifting groove (211) and can push the valve stem (472) to swing when the adsorption tube (44) rotates.

6. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 4, characterized in that: The adsorption tube (44) is also provided with a magnetic induction valve for automatically controlling the opening and closing of the adsorption tube (44). A lifting groove (211) is provided on the partition plate (21). A height adjustment screw (212) is rotatably connected in the lifting groove (211). A switch baffle (213) is slidably provided in the lifting groove (211). A threaded hole (215) threadedly connected to the height adjustment screw (212) is provided at one end of the switch baffle (213). The outer end of the switch baffle (213) extends out of the lifting groove (211) and a magnetic block is fixed on the outer end. When the adsorption tube (44) rotates to the switch baffle (213), the magnetic induction valve senses the magnetic field of the magnetic block and opens the adsorption tube (44).

7. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 5, characterized in that: The jig (24) is in the shape of an elongated strip and is provided with a material storage chute (241) matching the contour of the tableware. An elastic material blocking rod (242) is fixed to the front end of the jig (24).

8. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 7, characterized in that: A locking screw (243) is fixed on the lower end surface of the jig (24), a long strip-shaped adjustment hole (231) is fixed in the installation groove (23), and the locking screw (243) is inserted into the adjustment hole (231) and is locked and fixed by a nut.

9. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 1, characterized in that: An inlet is formed on one side of the square discharging frame (8), and the inlet is connected to the outlet of the discharging slideway (3).

10. The feeding system of the fully automatic packaging production line for plastic tableware according to claim 1, characterized in that: The discharging chute (3) comprises a straight chute (31) and an inclined chute (32) connected to the rear end of the straight chute (31), and the angle between the inclined chute (32) and the straight chute (31) is 120° to 150°.

Images