Rubber leaf original state dinner plate and manufacturing method

Abstract

The invention provides a rubber leaf original-state dinner plate and a manufacturing method thereof, the dinner plate is manufactured by taking original-state rubber leaves as main raw materials and rubber leaf powder as auxiliary materials and adopting a hot press molding process, and the manufacturing method comprises the specific steps of screening, cleaning, drying, crushing, paving, pre-pressing, feeding, hot press molding, shaping, trimming, packaging, warehousing and the like. No additive is added in the dinner plate forming process, viscous substances are generated at high temperature and high pressure through lignin and other components contained in the rubber leaves, the effect similar to that of an adhesive is achieved, glue-free gluing is achieved according to the self-adhesion principle, and the dinner plate is green, healthy and environmentally friendly. According to the method, original state forming is used for replacing powder forming or slurry forming and other modes, the possibility that powder or fine fibers fall off and are inhaled by a human body to cause potential hazards is avoided, residual materials obtained after trimming can be smashed again to be used for powder layer paving, energy consumption in the machining process can be reduced, the production efficiency is high, and the production cost is low. The method is a green tableware manufacturing method which can be widely applied.

Description

Technical Field

[0001] The invention relates to a rubber leaf and an original hot pressing molding method thereof, belonging to the technical field of biomass processing, and specifically relates to an original rubber leaf dinner plate and a manufacturing method thereof. Background Art

[0002] Disposable plastic products have brought great convenience to people's lives, but because they are not easy to degrade, disposable plastic products cause great environmental pollution, and it is necessary to find environmentally friendly plastic substitutes. In the rubber industry, the yield of rubber trees between 30 and 40 years old gradually enters the decline period, and the economic value drops sharply, so people will cut them down and plant seedlings. Relatively large trunks are often recycled and transported to processing plants for processing and utilization of furniture and other products, while the remaining branches, treetops, bark, leaves, roots and other smaller parts are often discarded, landfilled or incinerated, with low utilization rate. Rubber leaves, as biomass, have good degradation properties compared to plastics. Therefore, using rubber leaves as a substitute for disposable plastic tableware can not only alleviate the problem of plastic pollution, but also make full use of waste biomass resources.

[0003] The molding process is a key process in the production of molded products. Pulp molding is currently the most widely used process, but it has many steps, including pulping, hot pressing, drying and other processes. The process flow is complicated and energy-intensive, and a variety of chemical additives are added during the pulping process, which reduces its environmental protection level. Therefore, how to simplify the molding process, improve production efficiency, and reduce energy consumption; and how to avoid the use of traditional adhesives and chemical additives, improve the environmental protection level, and avoid the health and environmental risks they may bring are technical problems that need to be solved urgently. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve the problems existing in the above-mentioned existing technologies, the present invention provides a rubber leaf original dinner plate and a manufacturing method. The dinner plate is made of original rubber leaves as the main raw material, supplemented with rubber leaf powder, and is made by hot pressing. The manufacturing method solves the problem of complicated process flow in the existing molding process, and at the same time utilizes the principle of self-adhesion of biomass after hot pressing, avoids the use of traditional adhesives, and reduces the health and environmental risks that may be caused by chemical additives. It is a more environmentally friendly preparation method.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions, a rubber leaf raw dinner plate and a manufacturing method thereof, wherein the rubber leaf tableware raw hot pressing forming method comprises the following specific steps: (1) screening, using machine vision technology to remove inferior rubber leaves with mold and other phenomena; (2) cleaning, using water to clean the remaining rubber leaves to remove impurities and pollutants on the surface of the rubber leaves to ensure that the surface of the leaves is clean; (3) drying, using a drum dryer to adjust the moisture content to a level suitable for hot pressing; (4) crushing, taking part of the dried leaves and crushing them with a crusher for standby use; (5) directional paving, using a directional paving machine for paving, and the material blank after paving is composed of a blade layer, a powder layer and a blade layer from bottom to top; (6) pre-pressing, a flat pressing roller is provided behind each paving head for pre-pressing so that its surface The surface is kept flat for subsequent paving and hot pressing processes; (7) Loading: After paving is completed, it is sent to the lower mold by a conveyor belt so that the paving material covers the entire lower mold. The cutting device is used to cut between the conveyor belt and the lower mold to complete the loading; (8) Hot pressing molding: The lower mold is located on the slide and is located under the preheated hot pressing equipment before the hot pressing begins. Hot pressing is carried out at a certain temperature and pressure. After a period of time, the pressure is released and the hot pressing is completed; (9) Shaping: After the hot pressing is completed, the slide moves to the bottom of the shaping and trimming device through the slide rail. The lifting device controls the lifting of the shaping mold to shape the formed tableware; (10) Trimming: The mold knife on the shaping mold cuts off excess material during the shaping process; (11) Packaging and warehousing: The processed plates are packaged and stored.

[0008] 2. In the step (3), the drum dryer should rotate continuously to ensure uniform drying. The moisture content after drying is controlled between 2% and 30% to make it suitable for hot pressing. The drum dryer is equipped with a moisture content detection device to detect the moisture content of the internal material in real time.

[0009] 3. In the step (4), the powder after crushing should be 20 mesh to 100 mesh to ensure the filling effect of the powder on the gap.

[0010] 4. In the step (5), the equipment used is a paving machine, which specifically includes a blade paving head 1, a powder paving head, a blade paving head 2, an orientation roller, a powder feed port, a blade feed port and a swing plate. The blades dried in step (3) are loaded into the blade feed port, and the amount of blades dropped by the two blade paving heads can be adjusted by the swing of the swing plate. The powder crushed in step (4) is loaded into the powder feed port, and the paving head successively paves the blades, powder and blades evenly onto the conveyor belt. The paving machines all adopt variable frequency speed regulation, and can freely adjust the paving amount, paving ratio and paving density. The total number of blade paving layers should be 8 to 20 layers, and the paving ratio of blades to powder should be between 3:1 and 1:2. The orientation rollers realize the orientation of blades in different directions through different orientation grids, specifically horizontal orientation rollers and vertical orientation rollers, and the orientation rollers can be replaced as needed.

[0011] 5. In the step (8), the equipment used includes a hot pressing device and a sliding device. The hot pressing device specifically includes a heating device 2, an upper mold and a hydraulic device. The sliding device specifically includes a slide rail, a slide table, a heating device 1 and a lower mold. Before the hot pressing begins, the temperature of the upper and lower molds should be preheated to the hot pressing temperature and kept stable. The hot pressing temperature is 100°C to 200°C, the hot pressing pressure is 2Mpa to 16Mpa, and the hot pressing time is 0.5min to 5min to ensure that the internal components are fully softened and self-adhesive.

[0012] 6. In step (9), the equipment used is a shaping and trimming device and a sliding device, and the shaping and trimming device specifically includes a lifting device, a die cutter and a shaping die. The lifting device controls the lifting and lowering of the shaping die, and the formed dinner plate is shaped by the extrusion between the shaping die and the lower die, and the shaping time is 0.5min to 3min.

[0013] 7. In the step (10), the excess material after trimming can be recycled to step (4) as raw material for crushing, which helps to save energy and protect the environment.

[0014] 8. The upper mold, lower mold, shaping mold and mold knife are detachable and can be replaced with matching molds of corresponding shapes as needed.

[0015] (III) Beneficial effects

[0016] This patent provides a rubber leaf original dinner plate and a manufacturing method. It has the following beneficial effects:

[0017] (1) The present invention provides a rubber leaf original dinner plate and a manufacturing method, which utilizes the lignin and other components contained in the rubber leaf itself to generate a sticky substance under high temperature and high pressure, which plays a role similar to that of an adhesive, thereby realizing the principle of self-adhesion and achieving glue-free bonding, thereby improving the environmental protection level of the tableware, and is a more energy-saving and environmentally friendly molding method.

[0018] (2) The present invention provides a rubber leaf raw material dinner plate and a manufacturing method thereof, which uses raw rubber leaves as the main raw material and is supplemented with rubber leaf powder, thereby simplifying the processing steps of the raw materials and requiring only drying and partial crushing. Compared with pulp molding, this method significantly reduces the energy consumption during the raw material rewetting, molding and drying processes, which is beneficial to shortening the process flow and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the manufacturing process of the original rubber leaf dinner plate

[0020] Figure 2 Schematic diagram of hot pressing and trimming process for paving

[0021] Figure 3 Schematic diagram of horizontal directional roller

[0022] Figure 4 Schematic diagram of vertical oriented roller

[0023] Figure 5 Schematic diagram of flat roller

[0024] Figure 6 Schematic diagram of the hot pressing, shaping and trimming machine

[0025] Figure 7 Schematic diagram of the shaping and trimming device

[0026] Figure 8 Schematic diagram of various manufacturable dinner plates

[0027] Fig. 9 Schematic diagram of a mold for efficient production of a small-sized dinner plate

[0028] 1-sliding device, 11-slide rail, 12-slide table, 13-heating device 1, 14-lower mold, 2-hot pressing equipment, 21-heating device 2, 22-upper mold, 23-hydraulic device, 3-forming and trimming device, 31-lifting device, 32-mold knife, 33-forming mold, 4-conveyor belt, 5-directional paving machine, 51-blade paving port 1, 52-powder paving port, 53-blade paving port 2, 54-directional roller, 55-powder feeding port, 56-blade feeding port, 57-swing plate, 6-flat pressing roller, 7-cutting device DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The present invention provides a rubber leaf original dinner plate and a manufacturing method, which can be widely used in the manufacture of rubber leaf tableware. By replacing the mold, tableware of different sizes and shapes can be manufactured, such as round plate, square plate, round bowl, spoon, etc. ( Figure 8 The original molding method is highly efficient and easy to operate. It avoids the use of traditional adhesives in the process, reduces the health and environmental risks that may be caused by chemical additives, and is a more environmentally friendly preparation method. The specific steps include screening, cleaning, drying, crushing, directional paving, pre-pressing, loading, hot pressing, shaping, trimming, packaging and warehousing ( Figure 1 The blade laying direction can be adjusted by different directional rollers, specifically horizontal directional rollers ( Figure 3 ) and vertical directional rollers ( Figure 4), which can be adjusted according to manufacturing needs. The paving machines all use variable frequency speed regulation, which can freely adjust the paving amount, paving ratio and paving density. In addition, if the size of the manufactured dinner plates is small, one mold can realize the manufacture of multiple dinner plates ( Fig. 9 ), which improves production efficiency and reduces the cost of each unit product. The shaping mold, die cutter and forming mold are detachable. At the same time, in order to ensure the flatness and accuracy of the edge of the finished product, the selection of the shaping mold and die cutter must be strictly matched with the forming mold. Therefore, when replacing the forming mold to adapt to different shapes and sizes of dinner plates, the shaping mold and die cutter should also be replaced accordingly with the shaping mold and die cutter that are compatible with the new mold to ensure successful product shaping and correct trimming.

[0031] Embodiment 1: A method for manufacturing a circular dinner plate with high hardness and rigidity, the specific steps are as follows:

[0032] S1 Screening: By collecting leaf images, extracting features such as the color and texture of disease spots, and using machine vision to automatically screen out inferior rubber leaves such as those that are moldy.

[0033] S2 Cleaning: Clean the rubber leaves to remove impurities and contaminants on their surface.

[0034] S3 Drying. Use a drum dryer to dry the material to adjust the moisture content to 10%. Avoid excessive moisture content, as the evaporation of water during hot pressing may cause voids or defects inside the material, thereby reducing the hardness; at the same time, a certain moisture content helps maintain a stable structure and good cross-linking degree inside the material, thereby improving rigidity.

[0035] S4 crushing. Take some of the dried leaves and use a crusher to crush them into 50 mesh powder for later use. The finer rubber leaf powder helps to better fill the gaps between the leaf layers during the hot pressing process, forming a denser structure and improving the hardness of the plate.

[0036] S5 directional paving. Use a directional paving machine (5) to sequentially pave blades, powder, and blades onto a conveyor belt (4). Use directional rollers (54) in different directions. The horizontal directional roller orients the blades perpendicular to the production line, and the vertical directional roller orients the blades along the production line. The vertical paving of the blades can interweave the fibers between the blades to form a tighter structure, which helps to improve the overall strength of the plate. The total number of blade layers is 10, and the ratio of blades to powder is 1:2. Rubber leaf powder is used as a filler. A high powder paving ratio can increase the density of the material and the tightness of the internal structure, thereby increasing the hardness.

[0037] S6 pre-pressing. A flat pressing roller (6) is provided behind each paving opening for pre-pressing.

[0038] S7: Loading. The material blank after paving is sent to the lower mold (14) through the conveyor belt (4), and the cutting device (7) divides the paving material between the conveyor belt (4) and the lower mold (14), thereby completing the loading.

[0039] S8 hot pressing. The lower mold (12) is located on the slide (12), and is moved to the bottom of the hot pressing device (2) through the slide rail (11). The hydraulic device (23) is started to start hot pressing for 1.5 minutes at 150°C and 12Mpa. Under appropriate temperature and pressure, since the powder is easier to soften than the original blade, the dinner plate with a high powder paving ratio requires a shorter hot pressing time to avoid the phenomenon of carbonization caused by excessive hot pressing of the material.

[0040] S9 shaping. After the hot pressing is completed, the shaping and trimming device (3) is used to shape the formed tableware, and the shaping time is 0.5 minutes. After the hot pressing, the inside of the dinner plate with a high powder paving ratio has reached a better solidification state, forming a stable structure, and the required shaping time is shorter.

[0041] S10: trimming. The die cutter (32) on the shaping die (33) simultaneously cuts off the excess material during the shaping process, and the trimming excess material is recycled to step 3.

[0042] S11: Packing and storage. The meal trays processed in step S10 are packaged and stored.

[0043] Embodiment 2: A method for manufacturing a high-toughness round dinner plate, the specific steps are as follows:

[0044] S1 Screening: By collecting leaf images, extracting features such as the color and texture of disease spots, and using machine vision to automatically screen out inferior rubber leaves such as those that are moldy.

[0045] S2 Cleaning: Clean the rubber leaves to remove impurities and contaminants on their surface.

[0046] S3 Drying: Use a drum dryer to dry the rubber leaves to adjust the moisture content to 30%. Properly increasing the moisture content of the leaves avoids the rubber leaf material from losing a certain elasticity and toughness due to being too dry when the moisture content is too low.

[0047] S4 crushing. Take part of the dried leaves and crush them into 20 mesh powder using a crusher for later use. To make high-toughness dinner plates, it is necessary to reduce the powder fineness to prevent the finer rubber leaf powder from forming a denser structure during the hot pressing process, thereby increasing the hardness of the dinner plates.

[0048] S5 Directional paving. Use a directional paving machine (5) to sequentially pave blades, powder, and blades onto a conveyor belt (4). At the same time, use directional rollers (54) in the same direction, vertical directional rollers or horizontal directional rollers, to orient the blades in the same direction. Parallel paving is conducive to uniform heat transfer and uniform pressure distribution, so that a more uniform plate structure is formed during the hot pressing process, thereby improving its toughness. The ratio of blades to powder should be 2:1. Reducing the powder paving ratio can avoid high powder content making it too hard and reducing toughness. To ensure a consistent plate thickness, the total number of blade layers should be increased to 20 layers.

[0049] S6 pre-pressing. A flat pressing roller (6) is provided behind each paving opening for pre-pressing.

[0050] S7: Loading. The material blank after paving is sent to the lower mold (14) through the conveyor belt (4), and the cutting device (7) divides the paving material between the conveyor belt (6) and the lower mold (14), completing the loading;

[0051] S8 hot pressing. The lower mold (14) is located on the slide (12) and moves to the bottom of the hot pressing device (2) through the slide rail (11). The hydraulic device (23) is started to start hot pressing for 4 minutes at 150°C and 12Mpa. Under appropriate temperature and pressure, since the rubber leaf itself has a certain thickness and shape, a longer softening time is required to avoid insufficient softening of the leaf and affect the quality of the plate molding.

[0052] S9 shaping. After the hot pressing is completed, the shaping and trimming device (3) is used to shape the formed tableware, and the shaping time is 2 minutes. The degree of bonding between the blades of the dinner plate with a high blade paving ratio is weaker than that of the dinner plate with a high powder paving ratio, so a longer shaping time is required to ensure the final quality of the dinner plate.

[0053] S10: trimming. The die cutter (32) on the shaping die (33) simultaneously cuts off the excess material during the shaping process, and the trimming excess material is recycled to step 3.

[0054] S11: Packing and storage. The meal trays processed in step S10 are packaged and stored.

[0055] Embodiment 3: A method for manufacturing a five-pointed star-shaped dinner plate with high hardness and rigidity, the specific steps are as follows:

[0056] S1 Screening: By collecting leaf images, extracting features such as the color and texture of disease spots, and using machine vision to automatically screen out inferior rubber leaves such as those that are moldy.

[0057] S2 Cleaning: Clean the rubber leaves to remove impurities and contaminants on their surface.

[0058] S3 Drying. Use a drum dryer to dry the material to adjust the moisture content to 10%. Avoid excessive moisture content, as the evaporation of water during hot pressing may cause voids or defects inside the material, thereby reducing the hardness; at the same time, a certain moisture content helps maintain a stable structure and good cross-linking degree inside the material, thereby improving rigidity.

[0059] S4 crushing. Take some of the dried leaves and use a crusher to crush them into 80 mesh powder for later use. In order to make the stress more evenly distributed in the material, a higher powder fineness should be used in the molding process of complex-shaped dinner plates.

[0060] S5 Directional paving. Use a directed paving machine (5) to sequentially pave blades, powder, and blades onto a conveyor belt (4). Use directed rollers (54) in different directions at the same time. The horizontal directed roller orients the blades perpendicular to the production line, and the vertical directed roller orients the blades along the production line. The vertical paving of the blades can interweave the fibers between the blades to form a tighter structure, which helps to improve the overall strength of the dinner plate. The total number of blade layers is 10, and the ratio of blades to powder is 1:2. For the molding of complex-shaped dinner plates, the powder ratio should be appropriately increased. A high powder paving ratio can not only increase the density of the material and the compactness of the internal structure, but also improve its plasticity.

[0061] S6 pre-pressing. A flat pressing roller (6) is provided behind each paving opening for pre-pressing.

[0062] S7: Loading. The material blank after paving is sent to the lower mold (14) through the conveyor belt (4), and the cutting device (7) divides the paving material between the conveyor belt (6) and the lower mold (14), completing the loading;

[0063] S8 hot pressing. The lower mold (14) is located on the slide (12) and moves to the bottom of the hot pressing device (2) through the slide rail (11). The hydraulic device (23) is started to start hot pressing for 1.5 minutes at 150°C and 20t. Under appropriate temperature and pressure, since the powder is easier to soften than the original blade, the dinner plate with a high powder paving ratio requires a shorter hot pressing time to avoid excessive hot pressing of the material and cause scorching.

[0064] S9 shaping. After the hot pressing is completed, the shaping and trimming device (3) is used to shape the formed tableware, and the shaping time is 3 minutes. Since the structure of the five-pointed star-shaped dinner plate is relatively complex, a longer shaping time should be used to ensure the quality of the dinner plate.

[0065] S10: trimming. The die cutter (32) on the shaping die (33) simultaneously cuts off the excess material during the shaping process, and the trimming excess material is recycled to step 3.

[0066] S11: Packing and storage. The meal trays processed in step S10 are packaged and stored.

Claims

1. A rubber leaf original dinner plate and a manufacturing method, characterized in that: The method comprises the following characteristic steps: S1 Screening: By collecting leaf images, extracting features such as the color and texture of disease spots, and using machine vision to automatically screen out inferior rubber leaves such as those that are moldy; S2 cleaning: cleaning the rubber leaves to remove impurities and contaminants on their surface; S3 Drying: Use a drum dryer to dry the material to adjust its moisture content to a level suitable for hot pressing; S4 crushing: take some of the dried leaves and crush them into powder using a crusher for later use; S5 Directional Paving: Use a directional paving machine (5) to sequentially pave blades, powder, and blades onto a conveyor belt (4), while orienting the blades: S6 pre-pressing: a flat pressing roller (6) is provided behind each paving opening for pre-pressing; S7: Loading: the paved material is sent to the lower mold (14) of the hot pressing, shaping and trimming machine via a conveyor belt (4); the cutting device (7) divides the paved material between the conveyor belt (4) and the hot pressing, shaping and trimming machine to complete the loading; S8 hot pressing: the lower mold (14) is located on the slide (12), and before the hot pressing starts, it is located below the preheated hot pressing equipment (2), and the hydraulic device (23) is started to start the hot pressing; S9 shaping: after the hot pressing is completed, the slide table (12) moves to the bottom of the shaping and trimming device (3) through the slide rail (11), and the lifting device (31) controls the lifting and lowering of the shaping mold (33), and the formed tableware is shaped through the extrusion effect generated by the shaping mold (33) and the lower mold (14); S10 trimming: after the shaping mold (33) is lowered, the mold cutter (32) on the shaping mold (33) simultaneously performs trimming processing on the redundant material; S11 packaging and storage: the meal trays processed in step S10 are packaged and stored.

2. Step 3 according to claim 1, characterized in that: The drum dryer should rotate continuously to ensure uniform drying. The moisture content after drying is controlled between 2% and 30%. A moisture content detection device is provided in the drum dryer to detect the moisture content of the internal material in real time.

3. Step 4 according to claim 1, characterized in that: Rubber leaf crushing raw materials should give priority to leaves with poor appearance such as damage, insect bites, etc. The powder fineness after crushing should be 20 mesh to 100 mesh to ensure the filling effect of the powder on the gaps.

4. Step 5 according to claim 1, characterized in that: The equipment used in step 5 is a paving machine (5), which specifically includes a blade paving head 1 (51), a powder paving head (52), a blade paving head 2 (53), an orientation roller (54), a powder feed port (55), a blade feed port (56) and a swing plate (57). The blades dried in step 3 are loaded into the blade feed port (56). The amount of blades dropped from the blade paving head 1 (51) and the blade paving head 2 (53) can be adjusted by swinging the swing plate (57). The powder crushed in step 4 is loaded into the powder feed port (55). The paving head sequentially evenly spreads the blades, powder and blades onto the conveyor belt. The total number of blade paving layers is 8 to 20 layers, and the paving ratio of blades to powder should be between 3:1 and 1:

2.

5. Step 5 according to claim 1, characterized in that: The blade paving head 1 (51) and the blade paving head (53) are both provided with an orientation roller (54), and the orientation of the blade direction is achieved through different orientation grids. The orientation roller (54) includes a horizontal orientation roller and a vertical orientation roller, and the orientation roller (54) is detachable and replaceable.

6. Step 6 according to claim 1, characterized in that: A flat pressing roller (6) is arranged behind each paving head for pre-pressing to keep the surface flat for the subsequent paving and hot pressing process.

7. Step 8 according to claim 1, characterized in that: The equipment used in step 8 includes a hot pressing device (2) and a sliding device (1). The hot pressing device (2) specifically includes a heating device 2 (21), an upper mold (22) and a hydraulic device (23). The sliding device (1) specifically includes a slide rail (11), a slide table (12), a heating device 1 (13) and a lower mold (14). Before the hot pressing starts, the lower mold (14) and the upper mold (22) are respectively pre-heated to the required hot pressing temperature by the heating device 1 (13) and the heating device 2 (21) to prevent the molding quality from being affected by insufficient temperature during hot pressing.

8. Step 8 according to claim 1, characterized in that: The hot pressing temperature should be between 100℃ and 200℃ to ensure that the lignin is fully softened to produce good self-adhesiveness and to prevent excessive temperature from causing thermal degradation or carbonization of the leaves.

9. Step 8 according to claim 1, characterized in that: Taking the hot pressing of a disc-shaped dinner plate with a radius of 9 cm as an example, the hot pressing pressure should be between 2Mpa and 16Mpa to prevent the pressure from being too low, resulting in poor self-adhesion between the leaves, and the pressure from being too high, resulting in crushing, which affects the molding quality of the dinner plate.

10. Step 8 according to claim 1, characterized in that: The hot pressing time should be between 0.5min and 5min to ensure that the blades are fully self-adhesive and to prevent the blades from being pyrolyzed or carbonized due to excessive time, which would affect their durability and practicality.

11. Step 9 according to claim 1, characterized in that: The equipment used in step 9 is a shaping and trimming device (3) and a sliding device (1). The shaping and trimming device (3) specifically comprises a lifting device (31), a mold knife (32) and a shaping mold (33). The lifting device (31) controls the lifting and lowering of the shaping mold (33). The shaping mold (33) is tightly attached to the lower mold (14) and maintained for 0.5 minutes to 3 minutes to shape the formed tableware.

12. Step 10 according to claim 1, characterized in that: The mold knife (32) is located on the surface of the shaping mold (33). The shaping mold (33) trims the excess material of the dinner plate while shaping the dinner plate. The excess material after trimming can be recycled to step 4 as a crushed raw material, which is beneficial to energy saving and environmental protection.

13. The manufacturing method according to claim 1, characterized in that: The upper mold (22), the lower mold (14), the shaping mold (33) and the mold cutter (32) are detachable and can be replaced with matching molds of corresponding shapes as required.

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