High-rigidity bio-based tableware and method for manufacturing the same

Abstract

The application discloses a high-rigidity bio-based tableware and a manufacturing method thereof. The bio-based tableware comprises an upper box body, a lower box body and a cover body. The plate of the box body is curved to form a connecting part with a convex surface and a concave surface. The upper box body and the lower box body are both hollow box bodies with one side being open. The upper box body is provided with a right-angle clamping groove along the opening. The concave surface of the connecting part is clamped in the end part of the lower box body close to the opening. The convex surface of the connecting part is embedded and connected with the right-angle clamping groove. Compared with the prior art double-layer lunch box, one box cover is reduced, but the same effect of isolating food can be achieved. The upper box body is usually used for placing rice, and the lower box body can usually place soup or dishes. After the opening of the upper box body is covered by the cover body, the upper box body is inverted to make the cover body clamped with the lower box body. The bio-based tableware is not only environmentally friendly, but also lighter in weight than the prior art stainless steel or glass, causes less use burden to the user, and better meets the use demand.

Description

Technical Field

[0001] This invention belongs to the field of tableware technology, specifically relating to a high-rigidity bio-based tableware and its manufacturing method. Background Technology

[0002] In the prior art, users usually use double-layered lunch boxes to separate food from food. These double-layered lunch boxes are usually made of stainless steel or glass, which makes them relatively heavy. For users who need to carry them by hand, the weight of the lunch box plus the weight of the food will create a burden and reduce the frequency of use. Therefore, this invention proposes a high-rigidity bio-based tableware and its manufacturing method. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a high-rigidity bio-based tableware and its manufacturing method, thereby changing the structure of the tableware and reducing the burden of use.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A high-rigidity bio-based tableware is characterized by comprising an upper box body, a lower box body, and a lid body. The lid body has a bent edge to form a connecting part with one side being raised and the other side being grooved. Both the upper box body and the lower box body are hollow boxes with an opening on one side. The upper box body has a right-angle slot along the opening. The groove of the connecting part is fitted into the end of the lower box body near the opening. The raised part and the right-angle slot of the connecting part are fitted together.

[0006] Furthermore, the lower box body is provided with a round rod and a partition plate. The round rod is located at the center of the lower box body. One side of the partition plate is provided with an arc-shaped fitting plate that fits the shape of the round rod. The other side fits the inner wall of the lower box body. The length of the partition plate is equal to the vertical distance between the round rod and the inner wall. When the partition plate is perpendicular to the inner wall of the lower box body, the partition plate is embedded between the round rod and the inner wall of the lower box body.

[0007] A method for preparing a high-rigidity bio-based tableware includes the following steps: a) Grinding dried straw into 50-70 mesh straw powder, comprising raw materials including straw, polylactic acid, starch, talc, and a silane coupling agent; using 70-80 mesh for polylactic acid and 180-230 mesh for talc; and preparing a 2%-5% water-soluble silane coupling agent. The straw grinding is performed using a grinding device, which includes a cutting device, a crushing device, and a milling device. First, cut the straw powder into small pieces using a cutting device, then crush and sieve it using the blades of a crushing device, and finally grind it into powder that meets the requirements using a grinding device; b, mix 45-60 parts of straw powder, 30-40 parts of polylactic acid, 50-60 parts of starch, and 7-10 parts of talc powder evenly, and stir the mixture with a silane coupling agent water solvent until it is fully mixed into a ball and no more water solvent can seep out; c, hot press the mixture in b into an upper box, a lower box, a lid, and a partition plate.

[0008] Furthermore, the cutting device includes a conveyor roller and a blade roller. The conveyor roller is set above the blade roller, and the two conveyor rollers are arranged opposite each other. The gap between the transmission rollers is used to convey straw. The blade roller includes a first rotating rod and a blade plate. The blade plate is provided with a first blade along its edge. The blade plate is connected to the first rotating rod through a connecting rod. The end of the conveyor cylinder is provided with a first gear. One end of the first rotating rod is provided with a second gear, and the other end is provided with a first rotating motor. The first gears of adjacent transmission rollers mesh with each other, and the first gear and the second gear mesh. The specific cutting process is as follows: (1) The straw is fed into the conveyor cylinder set above the conveyor roller. The straw is fed into the blade roller through the rotating conveyor roller. (2) The blade roller rotates until the first blade faces the straw, cutting the straw into small segments.

[0009] Furthermore, the crushing device includes a crushing cylinder, a filter plate, and a second rotary motor. The crushing cylinder is vertically connected, with the bottom of the crushing cylinder serving as the outlet. The filter plate is rotatably connected to the end of the crushing cylinder near the outlet. The filter plate is equipped with a second blade, and the center of the filter plate is equipped with a first threaded rod. A pressure plate is threaded onto the first threaded rod. A first transmission wheel is fixed on the first threaded rod, and a second transmission wheel is provided at the output end of the second rotary motor. A transmission belt is fitted between the first transmission wheel and the second transmission wheel. The specific crushing process is as follows: (1) While the straw cut into small pieces is conveyed to the crushing cylinder through the screw, the second rotary motor starts and drives the first threaded rod to rotate counterclockwise, causing the pressure plate to move away from the filter plate along the axis of the first threaded rod, ensuring that the straw entering the crushing cylinder is between the filter plate and the pressure plate. (2) The rotation direction of the second rotary motor is changed, causing the first threaded rod to rotate clockwise. After being crushed, the straw in the crushing cylinder passes through the filter plate and is sieved. The pressure plate moves towards the filter plate along the axis of the first threaded rod, ensuring that the pressure plate always presses the straw tightly, so that the straw can be fully cut by the second blade.

[0010] Furthermore, a conveying device is provided between the cutting device and the crushing device. The conveying device includes a conveying cylinder, inside which is a screw. The screw is equipped with a fifth rotating motor, so that the straw cut into small pieces is conveyed to the crushing cylinder through the rotating screw.

[0011] Furthermore, a transition shell is provided between the crushing device and the grinding device. The transition shell contains a metering hopper, a pushing device, and a sensor. The metering hopper is used to transport the straw received from the crushing device to the grinding device. One end of the metering hopper is rotatably connected to the transition shell, and the other end is movably connected to the connecting block of the pushing device. The pushing device also includes a support, a second threaded rod, a second rotating rod, and a third rotating motor. The connecting block has a through hole, and a sleeve is provided inside the through hole. The sleeve is threaded to the outside of the second threaded rod, and a spring is fitted on the outside of the sleeve. The spring is located below the connecting block. The sensor includes a transmitter and a receiver, which are located on both sides of the metering hopper for sensing the connecting block. The second rotating rod is movably connected to the support. The second threaded rod has a first bevel gear, and the second rotating rod has a second bevel gear. The first bevel gear and the second bevel gear are meshed. The output of the three rotary motors is connected; the specific transportation process is as follows: when the solenoid valve is activated, the measuring hopper receives a certain weight of straw, and the connecting block at one end of the measuring hopper moves downward to compress the spring. When the connecting block descends to a certain position, it blocks the optical path from the transmitter to the receiver. The receiver sends a signal to the controller, which commands the solenoid valve at the outlet of the crushing device to close and simultaneously commands the third rotary motor to open. The second rotating rod, through the meshing of the first and second bevel gears, causes the second threaded rod to rotate. The rotation of the second threaded rod drives the sleeve to move along the axial direction of the second threaded rod, causing the measuring hopper to tilt at an angle, thereby feeding the crushed straw in the measuring hopper into the grinding device. Then, the third rotary motor reverses, causing the sleeve to move to the original position on the threaded rod. At this point, after all the crushed straw in the measuring hopper has been conveyed, the spring presses against the connecting block, and the measuring hopper returns to its original state. Then the solenoid valve is activated again, and the program repeats.

[0012] Furthermore, the first bevel gear has a ball bearing at its end, and the second bevel gear has a limiting block at its end. The limiting block and the second rotating rod are rotatably connected. The limiting block has a limiting groove, which is used to limit the movement of the ball bearing.

[0013] Furthermore, the grinding device includes a fixed plate, a gear ring, an external gear, and a blower. The external gear has a first through hole, and the fixed plate has a second through hole. The end of the external gear is fixed to the fixed plate, and the first and second through holes are interconnected. An internal gear is provided on the inner wall of the gear ring, and a sieve plate is provided at one end of the gear ring. The sieve plate and the gear form a grinding chamber. The blower includes a fourth rotary motor and a volute. An impeller is provided inside the volute. The output shaft of the fourth rotary motor is connected to the impeller, and an extension shaft is provided at the end of the output shaft. The extension shaft passes through the air inlet of the volute and connects to the sieve plate. The external gear limits... Located inside the grinding chamber, it meshes with the inner gear of the gear ring, so that the straw crushed material fills the gap between the inner gear and the outer gear and is ground by the relatively rotating inner gear and the outer gear; the specific grinding process is as follows: (1) The straw crushed material enters the grinding chamber through the first through hole and the second through hole, the fourth rotary motor is started, the gear ring rotates, the inner gear and the outer gear rotate relative to each other, and the straw crushed material is fully ground; (2) The impeller in the blower generates negative pressure, so that the ground straw powder passes through the sieve plate and is screened out through the blower outlet.

[0014] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0015] This invention includes an upper box body, a lower box body, and a lid. The edges of the box bodies are bent to form a connecting part with one side protruding and the other side grooved. Both the upper and lower box bodies are hollow boxes with an opening on one side. The upper box body has a right-angle slot along the opening. The groove of the connecting part is engaged with the end of the lower box body near the opening. The protrusion and the right-angle slot of the connecting part are fitted together. Compared with existing double-layer lunch boxes, one lid is eliminated, but the same function of isolating food is achieved. The upper box body is usually used to hold rice, and the lower box body is usually used to hold soup or dishes. After the opening of the upper box body is sealed with the lid, the upper box body is inverted so that the lid engages with the lower box body. Furthermore, bio-based tableware is not only environmentally friendly, but also lighter than existing stainless steel or glass tableware, placing less burden on the user and better meeting usage needs. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram (a) of the internal structure of the grinding device in this invention;

[0018] Figure 2 This is a schematic diagram of the metering hopper and the pushing device in this invention;

[0019] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram (II) of the internal structure of the grinding device in this invention;

[0021] Figure 5 This is a schematic diagram (III) of the internal structure of the grinding device in this invention;

[0022] Figure 6 This is a partial diagram of the grinding device in this invention;

[0023] Figure 7 This is a top view of the gear ring in this invention;

[0024] Figure 8 This is a schematic diagram of the external gear in this invention;

[0025] Figure 9 This is a schematic diagram of the internal structure of the bio-based tableware in this invention;

[0026] Figure 10 for Figure 9 Enlarged view of point B in the middle;

[0027] Figure 11 This is a partial structural diagram of the lower box body in this invention;

[0028] Figure 12 for Figure 11 A magnified view of point C in the middle.

[0029] In the diagram, 1-Conveying cylinder; 2-First gear; 3-Second gear; 4-First rotary motor; 5-First transmission wheel; 6-Pressure plate; 7-Crushing cylinder; 8-Filter plate; 9-First threaded rod; 10-Screw; 11-Measuring hopper; 12-Pushing device; 13-Fixing plate; 14-Vortex housing; 15-Fourth rotary motor; 16-Connecting block; 17-Sleeve; 18-Spring; 19-First bevel gear; 20-Second bevel gear; 21-Limiting block; 22-Limiting groove; 23-Support; 24-Second rotating rod; 25-Third rotary motor; 26-Second blade; 27-Outlet; 28-Transmitter; 29-Receiver; 30-Fifth Rotary Motor; 31-First Rotating Rod; 32-Connecting Rod; 33-Blade Plate; 34-Transmitting Roller; 35-Air Inlet; 36-Air Outlet; 37-Gear Ring; 38-Grinding Chamber; 39-External Gear; 40-First Through Hole; 41-Sieve Plate; 42-Upper Box Body; 43-Right Angle Slot; 44-Connecting Part; 45-Cover Body; 46-Lower Box Body; 47-Divider Plate; 48-Arc Fitting Plate; 49-Round Rod; 50-Ball Ball; 51-Transmitting Cylinder; 52-Second Threaded Rod; 53-Extension Shaft. Detailed Implementation

[0030] like Figures 1 to 12As shown, this invention provides a high-rigidity bio-based tableware, comprising an upper box 42, a lower box 46, and a lid 45. The lid 45 has a bent edge forming a connecting part 44 with one side protruding and the other side grooved. Both the upper box 42 and the lower box 46 are hollow boxes with an opening on one side. The upper box 42 has a right-angle slot 43 along the opening. The groove of the connecting part 44 is engaged with the end of the lower box 46 near the opening. The protrusion of the connecting part 44 and the right-angle slot 43 are fitted together. Compared with existing double-layer lunch boxes, this invention eliminates the need for a lid, while still effectively isolating food. The upper box 42 is typically used for rice, and the lower box 46 is typically used for soups or dishes. After the opening of the upper box 42 is sealed with the lid 45, the upper box 42 is inverted so that the lid 45 engages with the lower box 46. Furthermore, this bio-based tableware is not only environmentally friendly but also lighter than existing stainless steel or glass tableware, reducing the burden on users and better meeting their needs.

[0031] The lower box body 46 is provided with a round rod 49 and a partition plate 47. The round rod 49 is located at the center of the lower box body 46. One side of the partition plate 47 has an arc-shaped fitting plate 48 that fits into the shape of the round rod 49. The other side fits into the inner wall of the lower box body 46. The length of the partition plate 47 is equal to the vertical distance between the round rod 49 and the inner wall. When the partition plate 47 is perpendicular to the inner wall of the lower box body 46, the partition plate 47 is embedded between the round rod 49 and the inner wall of the lower box body 46. Unlike the partition plate 47 of the prior art, the partition plate 47 of the present invention can reasonably allocate the space of the lower box body 46 as needed, so that different quantities of vegetables or soups can be reasonably accommodated in the lower box body 46.

[0032] An embodiment of the preparation method of a high-rigidity bio-based tableware of the present invention includes the following steps: a) The raw materials include straw, polylactic acid, starch, talc powder and silane coupling agent. The dried straw is ground into 60-mesh straw powder; the particle size of polylactic acid is 75 mesh, the particle size of talc powder is 210 mesh, and the silane coupling agent is prepared as a 4% water solvent. The straw grinding is carried out using a grinding device, which includes a cutting device, a crushing device and a grinding device. The straw is first cut into small pieces by the cutting device, then crushed and sieved by the blades of the crushing device, and finally ground into powder that meets the requirements by the grinding device. In the prior art, straw is wasted a lot during grinding because of its different shapes and sizes, and it will also cause great damage to the existing equipment. The present invention produces straw powder of the required mesh size by cutting-crushing-grinding. The product made from straw powder of this mesh size will have a granular texture, but will not be too rough. b. Mix 50 parts of straw powder, 35 parts of polylactic acid, 55 parts of starch and 9 parts of talc powder evenly, and stir the mixture with silane coupling agent water solvent until it is fully mixed into a ball and no water solvent can seep out; c. Hot press the mixture in b into a high-rigidity upper box 42, lower box 46, cover 45 and partition plate 47.

[0033] The cutting device includes a conveyor roller 34 and a blade roller. The conveyor roller 34 is set above the blade roller. The two conveyor rollers 34 are arranged opposite each other. The gap between the conveyor rollers is used to convey straw. The blade roller includes a first rotating rod 31 and a blade 33. The blade 33 is provided with a first blade along its edge. The blade 33 is connected to the first rotating rod 31 through a connecting rod 32. A first gear 2 is provided at the end of the conveyor roller. A second gear 3 is provided at one end of the first rotating rod 31 and a first rotating motor 4 is provided at the other end. The first gears 2 of adjacent conveyor rollers mesh with each other. The first gear 2 and the second gear 3 mesh with each other. The specific cutting process is as follows: (1) The straw is fed into the conveyor cylinder 1 set above the conveyor roller 34. The straw is squeezed by the rotating conveyor roller 34 to reduce the hardness and size of the straw and is fed into the blade roller. (2) The blade roller rotates until the first blade faces the straw and cuts the straw into small segments.

[0034] The crushing device includes a crushing cylinder 7, a filter plate 8, and a second rotary motor. The crushing cylinder 7 is vertically connected, and the bottom of the crushing cylinder 7 is the outlet 27. The filter plate 8 is rotatably connected to the end of the crushing cylinder 7 near the outlet 27. The filter plate 8 is provided with a second blade 26, and the center of the filter plate 8 is provided with a first threaded rod 9. The first threaded rod 9 is threadedly connected to a pressure plate 6. The first threaded rod 9 is fixed with a first transmission wheel 5. The output end of the second rotary motor is provided with a second transmission wheel. A transmission belt is sleeved between the first transmission wheel 5 and the second transmission wheel. The specific crushing process is as follows: (1) A conveying device is provided between the cutting device and the crushing device. The conveying device includes a conveying cylinder 51. The conveying cylinder 51 is provided with a screw 10. One end of the screw 10 is provided with a fifth rotary motor. The motor 30 is connected to the crushing cylinder 7 at the other end, so that the straw cut into small pieces is conveyed into the crushing cylinder 7 through the rotating screw 10. At the same time, the second rotary motor starts and drives the first threaded rod 9 to rotate counterclockwise, so that the pressure plate 6 moves away from the filter plate 8 in the axial direction of the first threaded rod 9, ensuring that the straw entering the crushing cylinder 7 is between the filter plate 8 and the pressure plate 6. (2) Change the rotation direction of the second rotary motor so that the first threaded rod 9 rotates clockwise. After the straw in the crushing cylinder 7 is crushed, it passes through the filter plate 8 and is screened. The pressure plate 6 moves closer to the filter plate 8 in the axial direction of the first threaded rod 9, ensuring that the pressure plate 6 always presses the straw tightly, so that the straw can be fully cut by the second blade 26. The above structure can ensure that most of the straw can be cut and crushed by the second blade 26, avoiding the first blade from spinning idly. The second rotary motor can be a bidirectional motor.

[0035] A transition shell is provided between the crushing device and the grinding device. Inside the transition shell are a metering hopper 11, a pushing device 12, and a sensor. The metering hopper 11 is used to transport the crushed straw received from the crushing device to the grinding device. One end of the metering hopper 11 is rotatably connected to the transition shell, and the other end is movably connected to the connecting block 16 of the pushing device 12. The pushing device 12 also includes a support 23, a second threaded rod 52, a second rotating rod 24, and a third rotating motor 25. The connecting block 16 has a through hole, and a sleeve 17 is provided inside the through hole. The sleeve 17 is threaded... A spring 18 is sleeved on the outside of the sleeve 17 connected to the second threaded rod 52. The spring 18 is located below the connecting block 16. The sensor includes a transmitter 28 and a receiver 29, which are located on both sides of the measuring hopper 11 for sensing the connecting block 16. The second rotating rod 24 is movably connected to the support 23. The second threaded rod 52 is provided with a first bevel gear 19, and the second rotating rod 24 is provided with a second bevel gear 20. The first bevel gear 19 and the second bevel gear 20 are meshed. The second rotating rod 24 is connected to the output end of the third rotating motor 25. The specific transportation process is as follows: when the solenoid valve is activated, and the measuring hopper 11 receives a certain weight of straw, the connecting block 16 at one end of the measuring hopper 11 moves downward to compress the spring 18. When the connecting block 16 descends to a certain position, it blocks the light path from the transmitter 28 to the receiver 29. The receiver 29 sends a signal to the controller, which commands the solenoid valve at the outlet 27 of the crushing device to close and simultaneously commands the third rotating motor 25 to open. The second rotating rod 24 passes through the first bevel gear 19 and the first bevel gear 20. The meshing of the second bevel gear 9 and the second bevel gear 20 causes the second threaded rod 52 to rotate. The rotation of the second threaded rod 52 drives the sleeve 17 to move axially along the second threaded rod 52, causing the measuring hopper 11 to tilt at an angle. This allows the crushed straw in the measuring hopper 11 to be fed into the grinding device. Then, the third rotary motor 25 reverses, causing the sleeve 17 to move back to its original position on the threaded rod. At this point, all the crushed straw in the measuring hopper 11 has been fed in. The spring 18 then presses against the connecting block 16, and the measuring hopper 11 returns to its original position. Then, the solenoid valve is activated, and the program repeats. This method can control the amount of crushed straw being ground each time, thus ensuring that the crushed straw is fully ground.

[0036] The first bevel gear 19 has a ball bearing 50 at its end, and the second bevel gear 20 has a limiting block 21 at its end. The limiting block 21 is rotatably connected to the second rotating rod 24. The limiting block 21 has a limiting groove 22, which is used to limit the movement of the ball bearing 50, so that the first bevel gear 19 and the second bevel gear 20 remain meshed.

[0037] The grinding device includes a fixed plate 13, a gear ring 37, an external gear 39, and a blower. The external gear 39 has a first through hole 40, and the fixed plate 13 has a second through hole. The end of the external gear 39 is fixed to the fixed plate 13. The first through hole 40 and the second through hole are connected. An internal gear is provided on the inner wall of the gear ring 37. A sieve plate 41 is provided at one end of the gear ring 37. The sieve plate 41 and the gear form a grinding chamber 38. The blower includes a fourth rotary motor 15 and a volute 14. An impeller is provided inside the volute. The output shaft of the fourth rotary motor 15 is connected to the impeller. An extension shaft 53 is provided at the end of the output shaft. The extension shaft 53 passes through the air inlet 35 of the volute 14 and connects to the sieve plate. 41. The external gear 39 is limited in the grinding chamber 38 and cooperates with the tooth surface of the internal gear of the gear ring 37, so that the straw crushed material fills the gap between the internal gear and the external gear 39 and is ground by the relatively rotating internal gear and the external gear 39; the specific grinding process is as follows: (1) The straw crushed material enters the grinding chamber 38 through the first through hole 40 and the second through hole, the fourth rotary motor 15 is started, the gear ring 37 rotates, the internal gear and the external gear 39 rotate relative to each other, and the straw crushed material is fully ground; (2) The impeller in the blower generates negative pressure, so that the ground straw powder passes through the sieve plate 41 and is screened out through the blower outlet 36.

[0038] The entire straw grinding process is as follows: Straw is placed into conveyor cylinder 1 and compressed relative to conveyor cylinder 34, reducing the hardness of the straw. After being cut by the blade roller, it is divided into several segments. The smaller segments of straw enter the conveyor cylinder and are conveyed to the crushing cylinder 7 by screw 10. When conveying the smaller segments of straw, the first threaded rod 9 rotates counterclockwise, increasing the distance between the pressure plate 6 and the filter plate 8, allowing the smaller segments of straw to enter between the pressure plate 6 and the filter plate 8. The rotation direction of the first threaded rod 9 is changed, and the second blade 26 on the filter plate 8 cuts and crushes the straw. At the same time, the pressure plate 6 moves towards the filter plate 8 along the axis of the first threaded rod 9 to press down the straw, ensuring that the straw is fully crushed. The solenoid valve is activated, and the crushed straw after sieving is poured into the metering hopper 11 from the outlet 27. After receiving the planned weight, the connecting block 16 on one side of the metering hopper 11 compresses the spring 18 to the lowest point. After the optical path between transmitter 28 and receiver 29 is blocked by 16, receiver 29 sends a command to controller. Controller starts third rotary motor 25. The rotation of second rotating rod 24 drives second bevel gear 20 to rotate. Second bevel gear 20 transmits power to first bevel gear 19, causing second threaded rod 52 to rotate. The rotation of second threaded rod 52 causes sleeve 17, threaded onto second threaded rod 52, to move upwards along the axis of second threaded rod. Measuring hopper 11 is tilted at an angle, quantitatively feeding the crushed straw in measuring hopper 11 into grinding chamber 38. The crushed straw is further ground through the toothed surface of gear ring 35 and external gear 39. After grinding, the qualified straw powder enters the air inlet 35 of volute 14 under the negative pressure of blower and finally flows out from air outlet 36. At this time, a collection bag can be set at air outlet 36 to facilitate the collection of straw powder.

[0039] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A method for preparing a high-rigidity bio-based tableware, the high-rigidity bio-based tableware comprising an upper box body, a lower box body, and a lid body, wherein the lid body is bent along its edge to form a connecting part with one side being a protrusion and the other side being a groove, both the upper box body and the lower box body are hollow boxes with one side opening, the upper box body is provided with a right-angle slot along the opening, the groove of the connecting part is fitted into the end of the lower box body near the opening, the protrusion of the connecting part and the right-angle slot are fitted together, the lower box body is provided with a round rod and a partition plate, the round rod is located at the center of the lower box body, one side of the partition plate is provided with an arc-shaped fitting plate, the arc-shaped fitting plate and the round rod are fitted together, the other side is fitted into the inner wall of the lower box body, and the length of the partition plate is equal to the vertical distance between the round rod and the inner wall, when the partition plate is perpendicular to the inner wall of the lower box body, the partition plate is fitted between the round rod and the inner wall of the lower box body; Its features are: Includes the following steps: a. The raw materials include straw, polylactic acid, starch, talc, and silane coupling agent. The dried straw is ground into straw powder of 50-70 mesh. The particle size of polylactic acid is 70-80 mesh, the particle size of talc is 180-300 mesh, and the silane coupling agent is prepared as a 2%-5% water solvent. The straw grinding is carried out using a grinding device, which includes a cutting device, a crushing device, and a grinding device. The straw is first cut into small pieces by the cutting device, then crushed and sieved by the blades of the crushing device, and finally ground into powder that meets the requirements by the grinding device. b. Mix 45-60 parts of straw powder, 30-40 parts of polylactic acid, 50-60 parts of starch and 7-10 parts of talc powder evenly, and stir the mixture with silane coupling agent water solvent until it is fully mixed into a ball and no water solvent can seep out. c. Hot-press the mixture in b into an upper box, a lower box, a lid, and a partition plate; A transition shell is provided between the crushing device and the grinding device. The transition shell contains a metering hopper, a pushing device, and a sensor. The metering hopper is used to transport the straw received from the crushing device to the grinding device. One end of the metering hopper is rotatably connected to the transition shell, and the other end is movably connected to the connecting block of the pushing device. The pushing device also includes a support, a second threaded rod, a second rotating rod, and a third rotating motor. The connecting block has a through hole, and a sleeve is provided in the through hole. The sleeve is threaded to the outside of the second threaded rod, and a spring is fitted on the outside of the sleeve. The spring is located below the connecting block. The sensor includes a transmitter and a receiver, which are located on both sides of the metering hopper for sensing the connecting block. The second rotating rod is movably connected to the support. The second threaded rod has a first bevel gear, and the second rotating rod has a second bevel gear. The first bevel gear and the second bevel gear are meshed. The second rotating rod is connected to the output end of the third rotating motor. The specific transportation process is as follows: The solenoid valve is activated. When the measuring hopper receives a certain weight of straw, the connecting block at one end of the measuring hopper moves downwards to compress the spring. When the connecting block descends to a certain position, it blocks the optical path from the transmitter to the receiver. The receiver sends a signal to the controller, which commands the solenoid valve at the outlet of the crushing device to close and simultaneously commands the third rotary motor to open. The second rotating rod, through the meshing of the first and second bevel gears, causes the second threaded rod to rotate. The rotation of the second threaded rod drives the sleeve to move axially along the second threaded rod, causing the measuring hopper to tilt at an angle, thus feeding the crushed straw from the measuring hopper into the grinding device. Then, the third rotary motor reverses, causing the sleeve to move back to its original position on the threaded rod. At this point, after all the crushed straw in the measuring hopper has been conveyed, the spring presses against the connecting block, and the measuring hopper returns to its original state. Then the solenoid valve is activated again, and the program repeats.

2. The method for preparing a high-rigidity bio-based tableware according to claim 1, characterized in that: The cutting device includes a conveyor roller and a blade roller. The conveyor roller is positioned above the blade roller, and the two conveyor rollers are arranged opposite each other. The gap between the conveyor rollers is used to convey straw. The blade roller includes a first rotating rod and a blade plate. The blade plate is provided with a first blade along its edge. The blade plate is connected to the first rotating rod via a connecting rod. A first gear is provided at the end of the conveyor roller. A second gear is provided at one end of the first rotating rod, and a first rotary motor is provided at the other end. The first gears of adjacent conveyor rollers mesh with each other, and the first gear and the second gear mesh with each other. The specific cutting process is as follows: (1) The straw is fed into the conveyor cylinder set above the conveyor roller. The straw is squeezed into a surface by the rotating conveyor roller and fed into the blade roller; (2) The blade roller rotates until the first blade faces the straw and cuts the straw into small sections.

3. The method for preparing a high-rigidity bio-based tableware according to claim 1, characterized in that: The crushing device includes a crushing cylinder, a filter plate, and a second rotary motor. The crushing cylinder is vertically connected, with the bottom of the crushing cylinder serving as the outlet. The filter plate is rotatably connected to the end of the crushing cylinder near the outlet. The filter plate is equipped with a second blade, and a first threaded rod is located at the center of the filter plate. A pressure plate is threaded onto the first threaded rod. A first transmission wheel is fixed on the first threaded rod, and a second transmission wheel is located at the output end of the second rotary motor. A transmission belt is fitted between the first transmission wheel and the second transmission wheel. The specific crushing process is as follows: (1) The straw cut into small pieces is conveyed to the crushing cylinder through the screw. At the same time, the second rotary motor starts and drives the first threaded rod to rotate counterclockwise, so that the pressure plate moves away from the filter plate in the axial direction of the first threaded rod, ensuring that the straw entering the crushing cylinder is between the filter plate and the pressure plate. (2) Change the rotation direction of the second rotary motor so that the first threaded rod rotates clockwise. After the straw in the crushing cylinder is crushed, it passes through the filter plate and is screened. The pressure plate moves towards the filter plate in the axial direction of the first threaded rod, ensuring that the pressure plate always presses the straw tightly, so that the straw can be fully cut by the second blade.

4. The method for preparing a high-rigidity bio-based tableware according to claim 3, characterized in that: A conveying device is provided between the cutting device and the crushing device. The conveying device includes a conveying cylinder, inside which is a screw. The screw is equipped with a fifth rotating motor, so that the straw cut into small pieces is conveyed to the crushing cylinder through the rotating screw.

5. The method for preparing a high-rigidity bio-based tableware according to claim 1, characterized in that: The first bevel gear has a ball bearing at its end, and the second bevel gear has a limiting block at its end. The limiting block and the second rotating rod are rotatably connected. The limiting block has a limiting groove, which is used to limit the movement of the ball bearing.

6. The method for preparing a high-rigidity bio-based tableware according to claim 1, characterized in that: The grinding device includes a fixed plate, a gear ring, an external gear, and a blower. The external gear has a first through hole, and the fixed plate has a second through hole. The end of the external gear is fixed to the fixed plate. The first and second through holes are connected. An internal gear is provided on the inner wall of the gear ring. A sieve plate is provided at one end of the gear ring. The sieve plate and the gear ring form a grinding chamber. The blower includes a fourth rotary motor and a volute. An impeller is provided inside the volute. The output shaft of the fourth rotary motor is connected to the impeller. An extension shaft is provided at the end of the output shaft. The extension shaft passes through the air inlet of the volute and connects to the sieve plate. The external gear is limited in the grinding chamber and engages with the tooth surface of the internal gear of the gear ring, so that the straw crushed material fills the gap between the internal gear and the external gear and is ground by the relatively rotating internal gear and the external gear. The specific grinding process is as follows: (1) The straw crushed material enters the grinding chamber through the first and second through holes. The fourth rotary motor is started, the gear ring rotates, and the internal gear and external gear rotate relative to each other to fully grind the straw crushed material; (2) The impeller in the blower generates negative pressure, so that the ground straw powder passes through the sieve plate and is screened out through the blower's air outlet.

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