A cup lid forming device applicable to biodegradable materials

Abstract

The present application provides a cup lid forming device suitable for biodegradable materials, including: an upper mold, a lower mold and a grasping device. The surface of the upper mold close to the lower mold has a plurality of first forming cavities, and a punching and cutting assembly is arranged in the first forming cavities. The punching and cutting assembly is used for punching the edge and punching holes during the cup lid forming process; the surface of the lower mold close to the upper mold has a plurality of second forming cavities, and the second forming cavities are arranged in one-to-one correspondence with the first forming cavities; a forming assembly is arranged inside the second forming cavities, and the forming assembly is used for forming the sheet material into a cup lid; the grasping device is used for simultaneously taking out a plurality of processed cup lids and automatically stacking them neatly; through the above structure, the present application can punch holes and punch the edge of the sheet material simultaneously through the cooperation of the upper mold and the lower mold to form a cup lid, improving the processing effect and having low cost; in addition, the processed cup lids are grasped and stacked neatly by the grasping device, without the need for re-stacking and alignment, thereby reducing the additional labor cost.

Description

Technical Field

[0001] This application relates to the technical field of cup lid forming, and particularly relates to a cup lid forming device suitable for biodegradable materials. Background Art

[0002] With the changes of the times and the improvement of living standards, people's life rhythm is getting faster and faster, and the fast food culture is also becoming popular. The basis of the fast food culture lies in food boxes, beverage cups and disposable tableware that are convenient, hygienic and easy to carry. Common beverage cups are generally disposable paper cups and plastic cups, which are mainly used for holding beverages in daily dining.

[0003] Existing cup lid forming devices basically adopt side punching devices, which punch holes and edges on sheet-shaped raw materials respectively, resulting in long processing time and low efficiency; at the same time, the side punching devices are very expensive, causing the processing cost to increase; in addition, the cup lids need to be re-stacked after falling, which will also increase additional costs. Summary of the Invention

[0004] The purpose of this application is to provide a cup lid forming device suitable for biodegradable materials for the above problems.

[0005] This application provides a cup lid forming device suitable for biodegradable materials, including: an upper mold, a lower mold and a grasping device;

[0006] The surface of the upper mold close to the lower mold has a plurality of first forming cavities, and a punching and cutting assembly is arranged in the first forming cavity, and the punching and cutting assembly is used for punching edges and holes during the cup lid forming process;

[0007] The surface of the lower mold close to the upper mold has a plurality of second forming cavities, and the second forming cavities are arranged in one-to-one correspondence with the first forming cavities; a forming assembly is arranged inside the second forming cavity, and the forming assembly is used for forming a sheet into a cup lid;

[0008] A grasping device, which is used to simultaneously take out a plurality of processed cup lids and automatically stack them neatly.

[0009] According to the technical solution provided by this application, the forming assembly includes: a first ejecting block, a second ejecting block and an air suction member. The air suction member is arranged between the first ejecting block and the second ejecting block. The air suction member is communicated with a vacuum assembly. The air suction member is used to suck the sheet during the cup lid forming process; a support structure is arranged at the bottom of the air suction member, and the inside of the support structure is hollow and the support structure is communicated with the air suction member; the support structure is used to leave a gap between the edge of the cup lid and the surface of the lower mold close to the upper mold to prevent a negative pressure cavity from being formed between the cup lid and the second forming cavity.

[0010] According to the technical solution provided by the present application, a die backing plate is arranged on the surface of the lower die close to the upper die, the second forming cavity penetrates through the die backing plate, and a plurality of first air holes communicating with the second forming cavity are arranged on the side wall of the die backing plate.

[0011] According to the technical solution provided by the present application, a plurality of second air holes communicating with the second forming cavity are arranged on the side wall of the lower die.

[0012] According to the technical solution provided by the present application, the punching and cutting assembly includes: a first cutting member, a second cutting member, and a punching structure. The first cutting member circumferentially surrounds the edge of the first forming cavity and is located on the side close to the second forming cavity. The first cutting member is used for cutting out the edge of the cup lid; the second cutting member is arranged in the first forming cavity and corresponds to the second ejecting block. The second cutting member is used for cutting out the drinking port; the punching structure is arranged in the first forming cavity and corresponds to the first ejecting block. The punching structure is used for forming the air outlet.

[0013] According to the technical solution provided by the present application, the punching structure includes:

[0014] A guiding block is arranged in the first forming cavity. An elastic member is arranged at the bottom of the guiding block. The elastic member is arranged at the bottom of the guiding block. One end of the elastic member is connected to the guiding block, and the other end of the elastic member is connected to the bottom wall of the first forming cavity; at least one first through hole is arranged through the guiding block along a first direction; the first direction is perpendicular to the bottom wall of the first forming cavity;

[0015] A thimble is arranged in the first forming cavity along the first direction, and one end of the thimble extends into the first through hole;

[0016] The elastic member has a first state and a second state. When in the first state, the elastic member is in a released state, and at this time the thimble is in the first through hole; when in the second state, the elastic member is in a compressed state, and at this time the thimble extends out of the first through hole and punches the sheet material to form the air outlet.

[0017] According to the technical solution provided by the present application, a lifting structure is arranged at the bottom of the thimble, and the lifting structure is used for controlling the extending height of the thimble.

[0018] According to the technical solution provided by the present application, the lifting structure includes:

[0019] A lifting rod, which is arranged inside the upper mold. One end of the lifting rod extends into the first forming cavity, and the driving end of the lifting rod is connected to the ejector pin.

[0020] A displacement sensor, which is arranged on the top of the ejector pin. The displacement sensor is used to monitor the distance change between the ejector pin and the sheet material to ensure the penetration depth of the ejector pin into the sheet material.

[0021] According to the technical solution provided by this application, the edges of the second ejector block and the first ejector block are arc-shaped.

[0022] According to the technical solution provided by this application, the grasping device includes: a robotic arm, a connecting plate is connected to the driving end of the robotic arm, and a plurality of suction cups are arranged at the bottom of the connecting plate. The suction cups are arranged in one-to-one correspondence with the second forming cavities.

[0023] Compared with the prior art, the beneficial effects of this application are as follows:

[0024] This application provides a cup lid forming device suitable for biodegradable materials, including: an upper mold, a lower mold and a grasping device. The surface of the upper mold close to the lower mold has a plurality of first forming cavities, and a punching and cutting assembly is arranged inside the first forming cavities. The punching and cutting assembly is used for punching the edge and punching holes during the cup lid forming process; the surface of the lower mold close to the upper mold has a plurality of second forming cavities, and the second forming cavities are arranged in one-to-one correspondence with the first forming cavities; a forming assembly is arranged inside the second forming cavities, and the forming assembly is used to form the sheet material into a cup lid; the grasping device is used to simultaneously take out multiple processed cup lids and automatically stack them neatly; when this application is in use, the sheet material is placed on the lower mold, and then the upper mold is controlled to move towards the lower mold. The upper mold punches from top to bottom, and a plurality of the forming assemblies and a plurality of the punching and cutting assemblies cooperate with each other to form a plurality of cup lids; after the cup lids are manufactured, the upper mold is controlled to move away from the lower mold, and then the grasping device simultaneously takes out multiple processed cup lids and places them at the designated position at the same time. At this time, the cup lids are arranged and placed in order; through the above structure, this application can simultaneously punch the edge and punch holes in the sheet material through the cooperation of the upper mold and the lower mold to form a cup lid, saving processing time and improving processing efficiency; at the same time, the equipment structure is simple and the cost is low; in addition, the processed cup lids are grasped and stacked neatly by the grasping device, eliminating the need for re-stacking and alignment, thereby reducing additional labor costs.

[0025] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that specific technical features, technical solutions or beneficial effects are included in at least one embodiment. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in this embodiment, the following will briefly introduce the drawings required for the description of the embodiment. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the lower mold of a cup lid forming device applicable to biodegradable materials provided in Embodiment 1 of this application;

[0028] Figure 2 Internal schematic diagram of the second forming cavity;

[0029] Figure 3 Schematic diagram of the upper mold of a cup lid forming device applicable to biodegradable materials provided in Embodiment 1 of this application;

[0030] Figure 4 Internal schematic diagram of the first forming cavity.

[0031] In the figure: 1. Upper mold; 11. First forming cavity; 12. First cutting piece; 13. Second cutting piece; 14. Guide block; 15. First through hole; 2. Lower mold; 21. Second forming cavity; 22. First ejector block; 23. Second ejector block; 24. Suction piece; 25. Support structure; 26. Mold backing plate; 27. First air hole; 28. Second air hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of this application. Specifically, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] Embodiment 1

[0035] Please refer to Figures 1 - 4 As shown, a schematic diagram of a cup lid forming device applicable to biodegradable materials provided in this embodiment includes: an upper mold 1, a lower mold 2, and a grasping device;

[0036] The surface of the upper mold 1 close to the lower mold 2 has a plurality of first forming cavities 11, and a punching and cutting assembly is arranged in the first forming cavities 11. The punching and cutting assembly is used for punching the edge and punching holes during the cup lid forming process;

[0037] The surface of the lower mold 2 close to the upper mold 1 has a plurality of second forming cavities 21, and the second forming cavities 21 are arranged in one-to-one correspondence with the first forming cavities 11; a forming assembly is arranged inside the second forming cavities 21, and the forming assembly is used to form a sheet into a cup lid;

[0038] A grasping device, which is used to simultaneously take out a plurality of processed cup lids and automatically stack them neatly.

[0039] In this embodiment, the lower mold 2 is fixedly placed on a placement platform, the upper mold 1 is arranged above the lower mold 2, the upper mold 1 is connected to a driving device, and the driving device is used to drive the upper mold 1 to move up and down; the grasping device is also fixedly placed on the placement platform;

[0040] In some embodiments, the gripping device includes: a robotic arm, a connecting plate is connected to the driving end of the robotic arm, a plurality of suction cups are arranged at the bottom of the connecting plate, and the suction cups are arranged in one-to-one correspondence with the second forming cavity 21; a plurality of suction cups are all connected to a gas source; after the cup lid is formed, the robotic arm drives the plurality of suction cups to move between the upper die 1 and the lower die 2, at this time the suction cups are in one-to-one correspondence with the cup lids, and then the robotic arm drives the suction cups to move downward to take out the formed cup lids at the same time; and the robotic arm drives the plurality of cup lids to move to a designated position and arranges them in sequence; after the next group of cup lids is formed, the robotic arm automatically stacks the next group of cup lids above the previous group of cup lids, without the need for manual re-stacking and alignment of the cup lids, reducing the additional labor cost;

[0041] Working principle: When this embodiment is in use, the sheet material is placed on the lower die 2, and then the upper die 1 is controlled to move towards the lower die 2. The upper die 1 punches downward from top to bottom, and a plurality of forming components and a plurality of punching components cooperate one by one to form a plurality of cup lids; after the cup lids are manufactured, the upper die 1 is controlled to move away from the lower die 2, and then the gripping device takes out the processed plurality of cup lids at the same time and places them at a designated position at the same time. At this time, the cup lids are arranged in sequence; through the above structure, the present application can punch and trim the sheet material at the same time through the cooperation of the upper die 1 and the lower die 2 to form cup lids, the equipment structure is simple and the cost is low; at the same time, the processed cup lids are grabbed and stacked by the gripping device, without the need for re-stacking and alignment, thereby reducing the additional labor cost.

[0042] In some embodiments, the forming component includes: a first ejector block 22, a second ejector block 23 and a suction member 24. The suction member 24 is arranged between the first ejector block 22 and the second ejector block 23. The suction member 24 is communicated with a vacuum assembly. The suction member 24 is used to suck the sheet material during the forming process of the cup lid; a support structure 25 is arranged at the bottom of the suction member 24. The inside of the support structure 25 is hollow, and the support structure 25 is communicated with the suction member 24; the support structure 25 is used to leave a gap between the edge of the cup lid and the surface of the lower die 2 close to the upper die 1 to prevent a negative pressure cavity from being formed between the cup lid and the second forming cavity 21.

[0043] Specifically, as Figure 2 shown, the forming component includes: a first ejector block 22, a second ejector block 23 and a suction member 24; wherein: the first ejector block 22 and the second ejector block 23 are used to form a convex portion adapted to the surface of the cup lid on the surface of the cup lid, so as to form a specific shape on the surface of the cup lid;

[0044] Specifically, the air suction member 24 is arranged between the first ejector block 22 and the second ejector block 23, and the air suction member 24 is connected to the vacuum assembly; during the forming process of the cup lid, after the sheet is placed on the lower mold 2, the sheet is sucked by air suction to prevent the sheet from moving; subsequently, the upper mold 1 presses downward from top to bottom, and multiple forming components and multiple punching components cooperate one by one to form multiple cup lids.

[0045] Specifically, after the cup lid is formed, the cup lid is still sucked by the air suction member 24. At this time, the edge of the cup lid is in close contact with the lower mold 2, and a negative pressure cavity will be formed between the cup lid and the second forming cavity 21; due to the instability of the biodegradable material, when the grasping device sucks the cup lid, although the air suction of the air suction member 24 for sucking the cup lid is cancelled, the negative pressure cavity between the edge of the cup lid and the lower mold 2 still exists, and the suction force of the grasping device is too large, which is likely to form a bulge in the middle of the cup lid; therefore, in this embodiment, to solve the above problems, a support structure 25 is arranged at the bottom of the air suction member 24. In this embodiment, the support structure 25 is a support block, the inside of the support block is hollow, the support block is communicated with the air suction member 24, and the vacuum assembly is communicated with the air suction member 24 through the support block; the support block is used to raise the height of the air suction member 24, so that the top of the air suction member 24 is slightly higher than the upper surface of the lower mold 2, so that after the cup lid is formed, there is a gap between the edge of the cup lid and the upper surface of the lower mold 2, and it is not in close contact with the lower mold 2, avoiding the formation of a negative pressure cavity between the cup lid and the second forming cavity 21, and further avoiding damaging the shape of the cup lid when the grasping device grabs the cup lid; in some embodiments, the height of the edge of the formed cup lid is about 2 cm. Therefore, in this application, the top of the air suction member 24 is slightly higher than the upper surface of the lower mold 2 by 2.5 cm.

[0046] In some embodiments, a mold backing plate 26 is arranged on the surface of the lower mold 2 close to the upper mold 1, the second forming cavity 21 penetrates through the mold backing plate 26, and a plurality of first air holes 27 communicated with the second forming cavity 21 are arranged on the side wall of the mold backing plate 26.

[0047] Specifically, a mold backing plate 26 is arranged on the surface of the lower mold 2 close to the upper mold 1. The mold backing plate 26 is used to make the surface of the lower mold 2 smoother. The second forming cavity 21 penetrates through the mold backing plate 26, and a plurality of first air holes 27 communicated with the second forming cavity 21 are arranged on the side wall of the mold backing plate 26, further avoiding the formation of a negative pressure cavity in the second forming cavity 21.

[0048] In some embodiments, a plurality of second air holes 28 communicated with the second forming cavity 21 are arranged on the side wall of the lower mold 2.

[0049] Specifically, a plurality of second through holes communicated with the second forming cavity 21 are arranged on the side wall of the lower mold 2, further avoiding the formation of a negative pressure cavity in the second forming cavity 21.

[0050] In some embodiments, the punching and cutting assembly includes: a first cutting member 12, a second cutting member 13, and a punching structure. The first cutting member 12 circumferentially surrounds the edge of the first forming cavity 11 and is located on the side close to the second forming cavity 21. The first cutting member 12 is used to cut out the edge of the cup lid. The second cutting member 13 is disposed within the first forming cavity 11 and is correspondingly arranged with the second ejector block 23. The second cutting member 13 is used to cut out the drinking opening. The punching structure is disposed within the first forming cavity 11 and is correspondingly arranged with the first ejector block 22. The punching structure is used to form the air vent.

[0051] Specifically, as Figure 4 shown, the punching and cutting assembly includes: a first cutting member 12, a second cutting member 13, and a punching structure. During the forming process of the cup lid, the upper die 1 presses the lower die 2 from top to bottom. At this time, the first cutting member 12 cuts out the edge of the cup lid, the second cutting member 13 cuts out the drinking opening of the cup lid, and at the same time, the punching structure ejects the air vent of the cup lid.

[0052] In some embodiments, the punching structure includes:

[0053] a guiding block 14, the guiding block 14 is disposed within the first forming cavity 11. An elastic member is provided at the bottom of the guiding block 14. The elastic member is provided at the bottom of the guiding block 14. One end of the elastic member is connected to the guiding block 14, and the other end of the elastic member is connected to the bottom wall of the first forming cavity 11. At least one first through hole 15 is provided through the guiding block 14 along a first direction. The first direction is perpendicular to the bottom wall of the first forming cavity 11.

[0054] a thimble, the thimble is disposed within the first forming cavity 11 along the first direction, and one end of the thimble extends into the first through hole 15.

[0055] The elastic member has a first state and a second state. When in the first state, the elastic member is in a released state, and at this time, the thimble is within the first through hole 15. When in the second state, the elastic member is in a compressed state, and at this time, the thimble extends out of the first through hole 15 and punches the sheet material to form the air vent.

[0056] Specifically, the punching structure includes: a guiding block 14, an elastic member, and a thimble. During the forming process of the cup lid, the upper die 1 presses the lower die 2 from top to bottom. At this time, the first ejector block 22 squeezes the guiding block 14, the elastic member becomes in a compressed state, and the thimble extends out of the first through hole 15 to punch the sheet material to form the air vent of the cup lid.

[0057] After the cup lid is formed, the upper die 1 moves away from the lower die 2. At this time, the elastic member becomes in a released state, the guiding block 14 moves upward, and the thimble is within the first through hole 15. The guiding block 14 is used to protect the thimble and at the same time ensure that the thimble remains stable during the lifting and lowering process, preventing it from tilting or deviating from the original track.

[0058] In some embodiments, a lifting structure is provided at the bottom of the ejector pin, and the lifting structure is used to control the protruding height of the ejector pin.

[0059] Specifically, at present, during the process of forming the air vent of the cup lid, when the ejector pin extends too deep into the cup lid, it is easy to cause the air vent to be too large. At the same time, when the upper mold 1 and the lower mold 2 are separated, the cup lid may get stuck on the ejector pin and is not easily detached. Therefore, in this application, a lifting structure is provided at the bottom of the ejector pin, and the lifting structure is used to control the protruding height of the ejector pin to avoid the ejector pin extending too deep, thereby avoiding the phenomenon that the cup lid is not easily detached from the ejector pin during processing.

[0060] In some embodiments, the lifting structure includes:

[0061] A lifting rod is arranged in the upper mold 1. One end of the lifting rod extends into the first forming cavity 11, and the driving end of the lifting rod is connected to the ejector pin.

[0062] A displacement sensor is arranged on the top of the ejector pin. The displacement sensor is used to monitor the change in the distance between the ejector pin and the sheet material to ensure the depth of penetration of the ejector pin into the sheet material.

[0063] Specifically, the lifting structure includes a lifting rod and a displacement sensor. During the forming process of the cup lid, the upper mold 1 presses the lower mold 2 from top to bottom. At this time, the first ejecting block 22 presses the guiding block 14, and the elastic member becomes in a compressed state. At the same time, the lifting rod is controlled to start, and the lifting rod drives the ejector pin to move. When the displacement sensor monitors that the change in the distance between the ejector pin and the sheet material reaches the set threshold value, the lifting rod drives the ejector pin to move away from the sheet material to ensure the depth of penetration of the ejector pin into the sheet material, thereby avoiding the phenomenon that the cup lid is not easily detached from the ejector pin during processing.

[0064] Specifically, in this embodiment, the lifting rod is an electric lifting rod or a pneumatic lifting rod.

[0065] In some embodiments, the edges of the second ejecting block 23 and the first ejecting block 22 are arc-shaped.

[0066] Specifically, the second ejecting block 23 is arranged corresponding to the drinking port. The second ejecting block 23 is used to form a convex portion adapted thereto on the surface of the cup lid, so as to form a specific shape on the surface of the cup lid. In this embodiment, the edges of the first ejecting block 22 and the second ejecting block 23 are arc-shaped, which avoids excessive stress on the edge of the convex portion on the cup lid and thus reduces the production of defective products.

[0067] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A cup lid forming device applicable to biodegradable materials, characterized in that, Including: an upper mold (1), a lower mold (2) and a gripping device; The surface of the upper mold (1) close to the lower mold (2) has a plurality of first forming cavities (11), and a punching component is arranged in the first forming cavities (11), and the punching component is used for punching the edge and punching holes during the forming process of the cup lid; The surface of the lower mold (2) close to the upper mold (1) has a plurality of second forming cavities (21), and the second forming cavities (21) are arranged in one-to-one correspondence with the first forming cavities (11); a forming component is arranged inside the second forming cavities (21), and the forming component is used for forming the sheet into a cup lid; a gripping device, which is used for simultaneously taking out a plurality of processed cup lids and automatically aligning them; The forming component includes: a first ejecting block (22), a second ejecting block (23) and a suction member (24). The first ejecting block (22) and the second ejecting block (23) are used for forming a convex portion adapted to the surface of the cup lid. The suction member (24) is arranged between the first ejecting block (22) and the second ejecting block (23). The suction member (24) is communicated with a vacuum assembly, and the suction member (24) is used for sucking the sheet during the forming process of the cup lid; a support structure (25) is arranged at the bottom of the suction member (24), the interior of the support structure (25) is hollow, and the support structure (25) is communicated with the suction member (24); the support structure (25) is used for leaving a gap between the edge of the cup lid and the surface of the lower mold (2) close to the upper mold (1) to prevent a negative pressure cavity from being formed between the cup lid and the second forming cavity (21).

2. The cup lid forming device applicable to biodegradable materials according to claim 1, wherein A mold backing plate (26) is arranged on the surface of the lower mold (2) close to the upper mold (1), the second forming cavity (21) penetrates through the mold backing plate (26), and a plurality of first air holes (27) communicated with the second forming cavity (21) are arranged on the side wall of the mold backing plate (26).

3. The cup lid forming device applicable to biodegradable materials according to claim 2, wherein, A plurality of second air holes (28) communicated with the second forming cavity (21) are arranged on the side wall of the lower mold (2).

4. The cup lid forming device applicable to biodegradable materials according to claim 1, wherein The punching component includes: a first cutting member (12), a second cutting member (13) and a punching structure. The first cutting member (12) circumferentially surrounds the edge of the first forming cavity (11) and is located on the side close to the second forming cavity (21), and the first cutting member (12) is used for cutting out the edge of the cup lid; the second cutting member (13) is arranged in the first forming cavity (11) and corresponds to the second ejecting block (23), and the second cutting member (13) is used for cutting out a drinking port; the punching structure is arranged in the first forming cavity (11) and corresponds to the first ejecting block (22), and the punching structure is used for forming an air outlet.

5. The cup lid forming device applicable to biodegradable materials according to claim 4, wherein The punching structure includes: A guiding block (14) is arranged in the first forming cavity (11). An elastic member is provided at the bottom of the guiding block (14). The elastic member is arranged at the bottom of the guiding block (14). One end of the elastic member is connected to the guiding block (14), and the other end of the elastic member is connected to the bottom wall of the first forming cavity (11). At least one first through hole (15) is arranged through the guiding block (14) along a first direction. The first direction is perpendicular to the bottom wall of the first forming cavity (11). A thimble is arranged in the first forming cavity (11) along the first direction. One end of the thimble extends into the first through hole (15). The elastic member has a first state and a second state. When in the first state, the elastic member is in a released state, and at this time the thimble is in the first through hole (15). When in the second state, the elastic member is in a compressed state, and at this time the thimble extends out of the first through hole (15) and punches the sheet material to form the air outlet hole.

6. The cup lid forming device applicable to biodegradable materials according to claim 5, wherein A lifting structure is arranged at the bottom of the thimble, and the lifting structure is used to control the extending height of the thimble.

7. The cup lid forming device applicable to biodegradable materials according to claim 6, characterized in that, The lifting structure includes: A lifting rod is arranged in the upper mold (1). One end of the lifting rod extends into the first forming cavity (11), and the driving end of the lifting rod is connected to the thimble. A displacement sensor is arranged at the top of the thimble. The displacement sensor is used to monitor the distance change between the thimble and the sheet material to ensure the penetration depth of the thimble into the sheet material.

8. The cup lid forming device applicable to biodegradable materials according to claim 1, characterized in that, The edges of the second ejecting block (23) and the first ejecting block (22) are arc-shaped.

9. The cup lid forming device applicable to biodegradable materials according to claim 1, characterized in that, The gripping device includes: a robotic arm. A connecting plate is connected to the driving end of the robotic arm. A plurality of suction cups are arranged at the bottom of the connecting plate, and the suction cups are arranged in one-to-one correspondence with the second forming cavity (21).

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