Aluminum foil container piercing mold and piercing forming method

Abstract

The application discloses an aluminum foil container puncture die and a puncture forming method, which comprises a lower die base, an upper die base, a lower die and an upper die, and further comprises: a puncture cutter movably arranged in the lower die; a crimping cutter movably arranged in the upper die; the puncture cutter is moved towards the crimping cutter to puncture the container and form a hem on the edge of the puncture point; the crimping cutter is moved towards the puncture cutter to deform and roll the hem in a crimping forming cavity. The aluminum foil container puncture die and the puncture forming method provided by the application can make the aluminum foil raw material into a container through the upper die and the lower die, and can make the puncture cutter puncture the container and form a hem through the movement of the puncture cutter towards the crimping cutter, and then the hem is rolled through the movement of the crimping cutter towards the puncture cutter, so that the aluminum foil can be formed into a container, the container can be punctured, and the hem formed by the puncture point can be rolled, thereby effectively eliminating the burrs formed by the puncture point.

Description

Technical Field

[0001] This invention relates to the field of aluminum foil container production mold technology, and more specifically to an aluminum foil container piercing mold and piercing forming method. Background Technology

[0002] Aluminum foil trays are a type of disposable tableware, mainly made of aluminum foil. They are often used to hold barbecued and baked foods. In order to reduce the amount of cooking oil residue in the tray, oil leakage holes need to be made in the aluminum foil tray. In the existing technology, stamping dies are used to puncture and open the holes.

[0003] According to the invention patent application with publication number CN116060496B and publication date of August 4, 2023, a high-precision aluminum foil lunch box calendering CNC forming machine is disclosed, including a base plate, a support platform located in the middle of the top surface of the base plate, an unwinding machine on one side of the top surface of the base plate, a conveyor on the other side of the top of the base plate, a winding machine on the base plate below the conveyor, a lifting plate above the top surface of the support platform, a lower die platform in the middle of the top surface of the support platform, and a calendering mechanism below the lifting plate. Its main technical effects are: through the cooperation of the calendering mechanism, the air blowing component, and the blowing component, it is convenient to carry out continuous stamping and forming operations on aluminum foil lunch boxes, and can quickly demold the formed aluminum foil lunch boxes. At the same time, by winding up the aluminum foil waste, it can automatically move the demolded aluminum foil lunch boxes to the guide plate, which can improve the automatic blowing function of the demolded aluminum foil lunch boxes, making it easy for the formed aluminum foil lunch boxes to be quickly moved to the guide plate, thus improving the efficiency and convenience of aluminum foil lunch box production.

[0004] Existing technologies for opening holes include two solutions: puncture and complete removal. When using puncture, simple puncture leaves puncture edges at the damaged edge, which poses a safety hazard of cutting hands during use. On the other hand, the complete removal solution leaves waste material inside the cavity, requiring additional waste collection or cleaning processes. Therefore, this paper proposes an aluminum foil container puncture mold and puncture forming method, aiming to provide an aluminum foil container production mold that can ensure that the puncture edges do not cut hands and that no waste material remains. Summary of the Invention

[0005] The purpose of this invention is to provide an aluminum foil container piercing mold and piercing forming method, aiming to provide an aluminum foil container production mold that can ensure that the pierced edge will not cut hands and that there is no waste residue.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A perforation mold for an aluminum foil container includes a lower mold base and an upper mold base movably connected to the lower mold base. The lower mold base contains a lower mold, and the upper mold base contains an upper mold. The mold also includes: A piercing tool is set inside the lower mold, and the piercing tool is provided with a piercing tip; An edge-curling cutter is movable within the upper mold, and the edge-curling cutter is provided with an edge-curling forming cavity; The upper mold base moves toward the lower mold base, so that the upper mold and the lower mold cooperate to form the raw material into a container; The piercing blade moves toward the edge-folding blade, causing the piercing blade to pierce the container and forming a folded edge at the piercing point. The edge-rolling cutter moves toward the piercing cutter, causing the edge-rolling forming cavity to come into contact with the folded edge, thus deforming and rolling the folded edge into the edge-rolling forming cavity.

[0007] Preferably, the hemming forming cavity includes a first forming edge and a second forming edge, wherein the first forming edge is connected to the second forming edge.

[0008] Preferably, the edge-rolling cutter has a deformation receiving cavity, which has a tip receiving cavity and a guide portion. The tip receiving cavity is located at the end of the guide portion of the wedge-shaped structure.

[0009] Preferably, the puncture tool has a puncture tip at its end and a rolled edge abutment groove on the puncture tool, the rolled edge abutment groove being symmetrically distributed on both sides of the puncture tip.

[0010] Preferably, the device also includes a puncture mechanism, which includes a puncture movable plate and a movable drive unit. The puncture movable plate is movably disposed in the lower mold base, and the puncture tool is inserted into the puncture movable plate. The lower mold has a through hole for the puncture tool to pass through. The movable drive unit drives the puncture movable plate to move in the lower mold base, so that the puncture tool passes through the through hole.

[0011] Preferably, the active drive unit includes a mounting base, a rotating part, and a guide abutment part. The mounting base is fixedly mounted on the lower mold, the rotating part is rotatably connected to the mounting base, and the guide abutment part is rotatably connected to both ends of the rotating part. One end of the rotating part is located in the lower mold, and the other end is located outside the lower mold.

[0012] Preferably, the puncture mechanism further includes a reset plate and a limiting cylinder. The reset plate is movably connected to the lower mold and abuts against a guide abutment provided at one end of the rotating part.

[0013] Preferably, an upper cylinder is provided on the upper mold base, the upper mold is connected to the output end of the upper cylinder, and a pressure plate is connected to the upper mold base, the pressure plate being slidably connected to the upper mold.

[0014] A piercing forming method for the aforementioned aluminum foil container piercing mold includes the following steps: The upper mold base is driven to move downwards, and the material is cut by the pressure plate and pressed onto the reset plate. The upper mold is driven to move downwards, shaping the raw material into a container; The active drive unit drives the puncture active plate to move, so that the puncture knife on the puncture active plate passes through the lower mold. The puncture tip of the puncture knife pierces the container and continues to move toward the edge-rolling knife. The puncture tip of the puncture knife is inserted into the deformation receiving cavity. The puncture tip abuts against the tip receiving cavity, pushing the edge-rolling knife to move, so that the aluminum foil at the puncture point of the container moves along the guide part of the deformation receiving cavity and the side wall of the puncture knife to form a folded edge. The edge-rolling cutter is driven to move toward the piercing cutter, while the upper mold base rises, the clamping plate and the reset plate rise synchronously, and the piercing cutter and the edge-rolling cutter descend synchronously. As the curling cutter moves toward the piercing cutter, the first forming edge of the curling forming cavity abuts against the folded edge, causing the folded edge to deform around the first forming edge. During the deformation of the folded edge, it abuts against the second forming edge, and the folded edge further abuts against the curling abutment groove, causing the folded edge to be rolled into a folded edge roll. At this time, the piercing cutter returns to the lower mold.

[0015] The aluminum foil container piercing mold and piercing forming method provided by the present invention, as described above, have the following beneficial effects: This invention uses an upper and lower mold to form aluminum foil raw materials into containers. The piercing tool moves towards the edge-rolling tool, which pierces the container and forms a folded edge. Then, the edge-rolling tool moves towards the piercing tool to roll up the folded edge. This process can form aluminum foil into containers, pierce the container, and roll up the folded edge formed at the piercing point. This effectively eliminates burrs formed at the piercing point and does not generate waste, thus effectively improving the production speed of aluminum foil containers. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection structure between the upper mold base and the lower mold base provided in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the connection relationship between the upper and lower molds provided in an embodiment of the present invention. Figure 4This is a schematic diagram illustrating the connection relationship between the upper mold and the upper mold base provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the upper mold assembly structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the driving air chamber structure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram showing the connection relationship between the pneumatic piston and the drive chamber provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the initial state of the reset plate provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the reset plate in a downward moving state provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the initial state three-dimensional cross-section provided in an embodiment of the present invention; Figure 11 This is a three-dimensional sectional view of the mold-closed state provided in an embodiment of the present invention; Figure 12 This is a schematic cross-sectional view of the mold closing state provided in an embodiment of the present invention; Figure 13 This is a three-dimensional sectional view of the edge-rolling cutter under pressure, provided in an embodiment of the present invention. Figure 14 This is a schematic cross-sectional view of the pressing state of the edge-rolling cutter provided in an embodiment of the present invention; Figure 15 This is a three-dimensional cross-sectional view of the edge-rolling cutter and the positioning plate in contact state provided in an embodiment of the present invention; Figure 16 This is a schematic cross-sectional view of the edge-rolling cutter and the positioning plate in contact state provided in an embodiment of the present invention; Figure 17 This is a schematic diagram of the upper and lower mold reset states provided in an embodiment of the present invention; Figure 18 This is a schematic diagram of the three-dimensional structure of the edge-rolling tool provided in an embodiment of the present invention; Figure 19 This is a three-dimensional structural diagram of the puncture tool provided in an embodiment of the present invention; Figure 20 This is a schematic diagram of the initial state of the piercing tool and the edge-rolling tool provided in an embodiment of the present invention; Figure 21 This is a schematic diagram of the mold closing process provided in an embodiment of the present invention; Figure 22 This is an enlarged schematic diagram of point A provided in an embodiment of the present invention; Figure 23 This is a schematic diagram showing the state of the puncture tip piercing the aluminum foil, provided in an embodiment of the present invention. Figure 24This is an enlarged schematic diagram of point B provided in an embodiment of the present invention; Figure 25 This is a schematic diagram of the aluminum foil abutting against the side wall of the piercing tool according to an embodiment of the present invention; Figure 26 This is an enlarged schematic diagram of point C provided in an embodiment of the present invention; Figure 27 This is a schematic diagram of the piercing tool lifting the edge-rolling tool according to an embodiment of the present invention; Figure 28 This is an enlarged schematic diagram of point D provided in an embodiment of the present invention; Figure 29 This is a schematic diagram of the edge-rolling cutter starting to roll up the folded edge according to an embodiment of the present invention; Figure 30 This is an enlarged schematic diagram of point E provided in an embodiment of the present invention; Figure 31 This is a schematic diagram of the state during the folding and winding process provided in an embodiment of the present invention; Figure 32 This is an enlarged schematic diagram of point F provided in an embodiment of the present invention; Figure 33 This is a schematic diagram of the folded and rolled-up state provided in an embodiment of the present invention; Figure 34 This is an enlarged schematic diagram of point G provided in an embodiment of the present invention; Figure 35 This is a schematic diagram of the lower mold assembly structure provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Lower mold base; 11. Lower mold; 111. Support plate; 112. Punch; 113. Positioning and fixing plate; 2. Upper mold base; 21. Upper mold; 211. Limiting plate; 212. Positioning plate; 213. Die; 214. Receiving groove; 215. Movable cavity; 216. Pneumatic piston; 217. Drive air chamber; 22. Upper cylinder; 23. Clamping plate; 24. Pushing cylinder; 3. Piercing tool; 31. Piercing tip; 32. Edge curling. 4. Anvil groove; 41. Edge curling cutter; 41. Edge curling forming cavity; 411. First forming edge; 412. Second forming edge; 42. Deformation receiving cavity; 421. Tip receiving cavity; 422. Guide part; 43. Limiting block; 5. Puncture moving mechanism; 51. Puncture moving plate; 52. Moving drive unit; 521. Mounting base; 522. Rotating part; 523. Guide abutment part; 53. Reset plate; 54. Limiting cylinder; 6. Forming cylinder. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Please see Figures 1 to 35 A perforation mold for aluminum foil containers includes a lower mold base 1 and an upper mold base 2 movably connected to the lower mold base 1. The lower mold base 1 houses a lower mold 11, and the upper mold base 2 houses an upper mold 21. The mold also includes: The piercing tool 3 is set inside the lower mold 11, and the piercing tool 3 is provided with a piercing tip 31; An edge-curling cutter 4 is set inside the upper mold 21, and an edge-curling forming cavity 41 is provided on the edge-curling cutter 4. The upper mold base 2 moves toward the lower mold base 1, so that the upper mold 21 and the lower mold 11 cooperate to form the raw material into a container; The piercing knife 3 moves toward the edge-folding knife 4, causing the piercing knife 3 to pierce the container and forming a folded edge at the piercing point. As the edge-rolling cutter 4 moves toward the piercing cutter 3, the edge-rolling forming cavity 41 comes into contact with the folded edge, causing the folded edge to deform and roll up in the edge-rolling forming cavity 41.

[0021] This invention uses the upper mold 21 and the lower mold 11 to form aluminum foil raw material into a container. The piercing tool 3 moves toward the edge-rolling tool 4, which can pierce the container and form a folded edge. Then, the edge-rolling tool 4 moves toward the piercing tool 3 to roll up the folded edge. This process can form aluminum foil into a container, pierce the container, and roll up the folded edge formed at the piercing point. This can effectively eliminate the burrs formed at the piercing point and generate no waste, thereby effectively improving the production speed of aluminum foil containers.

[0022] As an embodiment of the present invention, the piercing tool 3 has a piercing tip 31 at its end, and a rolled edge abutment groove 32 is formed on the piercing tool 3, which is symmetrically distributed on both sides of the piercing tip 31. A deformation receiving cavity 42 is formed on the rolled edge tool 4, which has a tip receiving cavity 421 and a guide portion 422. Specifically, the guide portion 422 has a wedge-shaped structure, and the tip receiving cavity 421 is located at the end of the wedge-shaped guide portion 422. When the piercing tool 3 and the rolled edge tool 4 are engaged, the tip receiving cavity 421 can accommodate the piercing tip 31, while the guide portion 422 can guide the material when the piercing tool 3 and the rolled edge tool 4 are engaged, causing the material to move against the outer wall of the piercing tool 3. Figure 28 As shown, a gap is left between the piercing tool 3 and the through hole on the die 213 for the edge-rolling tool 4, so that the aluminum foil can be deformed.

[0023] As an embodiment of the present invention, the puncture mechanism 5 includes a puncture movable plate 51 and a movable drive unit 52. The puncture movable plate 51 is movably disposed in the lower mold 11, and the puncture knife 3 is inserted into the puncture movable plate 51. A through hole is provided on the lower mold 11 for the puncture knife 3 to pass through. The movable drive unit 52 is fixedly disposed on the lower mold base 1. The puncture movable plate 51 is driven to slide inside the lower mold 11 by the movable drive unit 52, so that the puncture knife 3 disposed on the puncture movable plate 51 passes through the through hole and penetrates the lower mold 11.

[0024] As an embodiment of the present invention, the puncture active plate 51 includes a needle fixing plate and a positioning connecting plate. The positioning connecting plate is fixedly connected to the needle fixing plate. A positioning hole for positioning the puncture knife 3 is provided on the positioning connecting plate. The end of the puncture knife 3 is fixedly connected to the positioning hole. Preferably, the puncture knife 3 is glued to the positioning hole with glue.

[0025] Furthermore, the lower mold 11 includes a support plate 111, a positioning and fixing plate 113, and a punch 112. There are four support plates 111 arranged in a rectangular array on the lower mold base 1. The positioning and fixing plate 113 is fixedly connected to the four support plates 111. The punch 112 is fixedly connected to the positioning and fixing plate 113. A cavity for forming aluminum foil is provided on the punch 112. A through groove for the piercing tool 3 to pass through is provided on both the punch 112 and the positioning and fixing plate 113.

[0026] As an embodiment of the present invention, the active drive unit 52 includes a mounting base 521, a rotating part 522, and a guide abutment part 523. The mounting base 521 is fixedly mounted on the outer wall of one side of the lower mold base 1 by bolts. The rotating part 522 is rotatably connected to the mounting base 521 by a rotating pin. The rotating part 522 has an overall "L" shaped structure. The guide abutment part 523 has a circular structure. The circular guide abutment part 523 is rotatably connected to both ends of the rotating part 522.

[0027] Furthermore, the puncture mechanism 5 also includes a reset plate 53 and a limiting cylinder 54. An embedding hole is provided on the lower mold base 1, the limiting cylinder 54 is installed in the embedding hole, the reset plate 53 is movably connected to the lower mold 11, and the outer wall of the reset plate 53 abuts against the output end of the limiting cylinder 54.

[0028] A clearance groove is provided on the lower mold 11, and the rotating part 522 is located in the clearance groove, such that one end of the rotating part 522 is located inside the lower mold 11, and the other end is located outside the lower mold 11. The guide abutment part 523 of the rotating part 522 located inside the lower mold 11 abuts against the piercing movable plate 51. The guide abutment part 523 of the rotating part 522 located outside the lower mold 11 abuts against the reset plate 53.

[0029] Preferably, the clearance groove is formed on the support plate 111 of the lower mold 11.

[0030] Preferably, the overall weight of the puncture movable plate 51 is greater than that of the reset plate 53, so that when no external force is applied, the puncture movable plate 51 always abuts against the guide abutment part 523 located at one end of the rotating part 522 inside the lower mold 11.

[0031] The piercing moving plate 51 is driven by the moving drive unit 52 of the mechanical structure. At the same time, the driving force comes from the mold closing, which makes the movement of the piercing cutter 3 more stable. Meanwhile, by controlling the mold closing stroke, the timing of the piercing tip 31 piercing the aluminum foil can be controlled, so as to more effectively control the piercing deformation.

[0032] like Figure 35 As shown, a lubricating oil guide groove 12 is provided on the lower mold base 1. The lubricating oil guide groove 12 is connected to the mounting position of the mounting base 521 on the lower mold base 1. A lubricating oil collection groove 13 is provided at the end of the lubricating oil guide groove 12. During the movement of the movable drive unit 52, lubrication is achieved through lubricating oil. At the same time, the lubricating oil guide groove 12 and the lubricating oil collection groove 13 can collect excess lubricating oil for subsequent processing.

[0033] As a further embodiment of the present invention, a forming cylinder 6 is also included. The forming cylinder 6 is fixedly installed on the lower mold base 1. When the output end of the forming cylinder 6 extends, it abuts against the reset plate 53 and pushes the reset plate 53 to slide outside the lower mold 11. Preferably, there are four forming cylinders 6, which are arranged on the lower mold base 1 and located on the outer side of the four corners of the lower mold 11.

[0034] As an embodiment of the present invention, the upper mold 21 includes a limiting plate 211, a positioning plate 212 and a die 213. The limiting plate 211 is fixedly installed on the outer wall of one side of the positioning plate 212, and the die 213 is fixedly installed on the outer wall of the other side of the positioning plate 212. A receiving groove 214 is provided on the positioning plate 212, so that a movable cavity 215 for the curling cutter 4 to move is formed between the positioning plate 212 and the outer wall of the die 213.

[0035] Furthermore, such as Figure 4 and Figure 5 As shown, a number of mounting holes are provided on the positioning plate 212, and a pneumatic piston 216 is movably arranged in the mounting holes. The number and distribution of the pneumatic piston 216 are adapted to the number and distribution of the edge-rolling cutter 4. The pneumatic piston 216 pushes the edge-rolling cutter 4 to move toward the lower mold 11.

[0036] like Figure 6 and Figure 7As shown, a connecting groove is provided on the edge of the positioning plate 212 near the side wall of the limiting plate 211, and a sealing strip is embedded in the connecting groove. A driving air chamber 217 is provided on the side wall of the positioning plate 212 near the limiting plate 211. After the limiting plate 211 and the positioning plate 212 are connected, the driving air chamber 217 is sealed to the outside by the sealing strip in the connecting groove. The mounting hole is opened in the driving air chamber 217 and passes through the positioning plate 212. A connecting air hole is provided on the limiting plate 211, which is connected to the driving air chamber 217. An external air source can be connected to the driving air chamber 217, and the pneumatic piston 216 in the mounting hole is driven by the external air source.

[0037] The upper mold 21 has a through hole for the crimping cutter 4 to pass through. For example... Figure 18 As shown, a limiting block 43 is provided at the end of the hemming cutter 4. The hemming cutter 4 is slidably connected to the through hole and is limited in the upper mold 21 by the limiting block 43. Specifically, a through hole is provided on the cavity 213, and the hemming cutter 4 is slidably connected to the through hole. One end of the hemming cutter 4 with the limiting block 43 is located inside the movable cavity 215. When the hemming cutter 4 moves toward the lower mold 11, it abuts against the outer wall of the cavity 213 through the limiting block 43, thus restricting the movement of the hemming cutter 4.

[0038] An upper cylinder 22 is fixedly installed on the upper mold base 2. The output end of the upper cylinder 22 is connected to the upper mold 21. The upper mold 21 is driven to move toward the lower mold 11 by the upper cylinder 22.

[0039] As an embodiment of the present invention, a pusher cylinder 24 is installed inside the upper mold base 2. The pusher cylinder 24 is fixedly installed inside the upper mold base 2. There are four pusher cylinders 24, which are distributed in a rectangular array. Through holes are provided on the limiting plate 211, the positioning plate 212 and the die 213 for the output end of the pusher cylinder 24 to pass through. During the resetting process of the upper mold 21, the formed container is pushed out of the upper mold 21 through the through hole by the output end of the pusher cylinder 24, thus completing the material discharge.

[0040] A piercing forming method for the above-mentioned aluminum foil container piercing mold includes the following steps: Drive the upper mold base 2 to move to the lower mold base 1, cut the raw material through the clamping plate 23, and press the raw material onto the reset plate 53; Drive the upper mold 21 to move to the lower mold 11, so that the raw material is formed into a container; The active drive unit 52 drives the piercing active plate 51 to move, so that the piercing knife 3 provided on the piercing active plate 51 passes through the lower mold 11, the piercing tip 31 of the piercing knife 3 pierces the container, and continues to move toward the edge-rolling knife 4. The piercing tip 31 of the piercing knife 3 is inserted into the deformation receiving cavity 42. The piercing tip 31 abuts against the tip receiving cavity 421, pushing the edge-rolling knife 4 to move, so that the aluminum foil at the piercing point of the container moves along the guide part 422 of the deformation receiving cavity 42 and the side wall of the piercing knife 3 to form a folded edge. The edge-rolling cutter 4 is driven to move toward the piercing cutter 3. At the same time, the upper mold base 2 rises, the clamping plate 23 and the reset plate 53 rise synchronously, and the piercing cutter 3 and the edge-rolling cutter 4 fall synchronously. During the movement of the curling cutter 4 toward the piercing cutter 3, the first forming edge 411 of the curling forming cavity 41 abuts against the folded edge, causing the folded edge to deform around the first forming edge 411. During the deformation of the folded edge, it abuts against the second forming edge 412, and the folded edge further abuts against the curling abutment groove 32, causing the folded edge to be rolled into a folded edge roll. At this time, the piercing cutter 3 returns to the lower mold 11.

[0041] Working principle: The raw material aluminum foil is fed into the mold via a feeding mechanism or manual feeding. like Figure 10 As shown, the upper mold base 2 is driven to move toward the lower mold base 1 by the driving mechanism of the mold, so that the clamping plate 23 connected on the upper mold base 2 abuts against the reset plate 53 set on the lower mold base 1, and clamps the raw material. It should be noted that in the initial state, the reset plate 53 is lifted up by the forming cylinder 6, so that the top of the reset plate 53 is flush with the top of the lower mold 11. Then the upper cylinder 22 drives the upper mold 21 to move toward the lower mold 11, so that the concave mold 213 of the upper mold 21 and the convex mold 112 of the lower mold 11 cooperate to form the raw material into a container. Subsequently, the upper mold base 2 moves further toward the lower mold base 1. At this time, the output end of the upper cylinder 22 retracts, so that the upper mold base 2 remains sliding relative to the upper mold 21. At this time, the upper mold 21 and the lower mold 11 remain in the mold-closing state. When the upper mold base 2 moves downward, the output end of the forming cylinder 6 retracts synchronously, and the clamping plate 23 pushes the reset plate 53 downward, so that the bottom of the reset plate 53 abuts against the guide abutment part 523 on the rotating part 522 of the movable drive unit 52, thereby driving the rotating part 522 to rotate. While one end of the rotating part 522 rotates, its other end pushes the piercing movable plate 51 located in the lower mold 11 toward the upper mold 21, so that the piercing knife 3 connected on the piercing movable plate 51 penetrates the container. like Figures 23 to 28 As shown, during the process of the piercing tool 3 penetrating the container, the piercing tip 31 of the piercing tool 3 first pierces the container, creating a gap. Since the piercing tip 31 has a wedge-shaped structure, the gap is gradually opened during the movement of the piercing tip 31. When the piercing tip 31 penetrates the container, the piercing tip 31 enters the deformation receiving cavity 42 of the edge-rolling tool 4. As the notch is gradually opened, the guide portion 422 of the deformation receiving cavity 42 of the wedge structure cooperates with the puncture tip 31 of the wedge mechanism, causing the notch to deform along the gap between the guide portion 422 and the puncture tip 31, and gradually fit against the side wall of the puncture tool 3, forming a folded edge structure facing the upper mold 21. Subsequently, the upper mold base 2 rises, the output end of the upper cylinder 22 extends and retracts, and under the action of gravity, the piercing movable plate 51 moves downward in the lower mold 11 and pushes the rotating part 522 to move. The rotating part 522 pushes the reset plate 53 to rise, causing the piercing tool 3 to descend in the lower mold 11. At the same time, the external air source drives the pneumatic piston 216 to move toward the lower mold 11, so that the edge forming cavity 41 of the edge forming tool 4 comes into contact with the folded edge. like Figures 29 to 32 As shown, when the hem forming cavity 41 abuts against the folded edge, the first forming edge 411 abuts against the folded edge first, causing the folded edge to bend and deform. Under the guidance of the first forming edge 411, it enters the second forming edge 412 and is further driven to deform and roll up through the second forming edge 412. When the folded edge deforms and rolls up, it abuts against the hem abutting groove 32 of the piercing tool 3, causing the folded edge to deform and roll up further. like Figure 33 and 34 As shown, the limiting block 43 on the final edge-rolling cutter 4 abuts against the positioning plate 212, and the edge is rolled up into an edge roll. Subsequently, the upper cylinder 22 retracts, causing the upper mold 21 to reset. The upper mold base 2 is reset under the drive of the mold driving mechanism. The output end of the forming cylinder 6 pushes against the reset plate 53, and the reset plate 53 resets. During the reset process of the upper mold 21, the formed container is pushed out of the upper mold 21 through the through hole by the output end of the pushing cylinder 24, thus completing the material discharge.

[0042] It should be noted that the feeding mechanism is a conventional feeding device in the existing technology, and its specific principle and structure will not be described in detail here.

[0043] It should be noted that multiple lower molds 11 can be set on the lower mold base 1, and multiple upper molds 21 can be set on the upper mold base 2 to improve production efficiency.

[0044] The aluminum foil container piercing mold and piercing forming method provided in the embodiments of the present invention also include other functional modules, such as electrical components, control units, etc., which should be known to those skilled in the art and will not be described in detail here.

[0045] Those skilled in the art will understand that other similar connection methods can also achieve the present invention. For example, welding, bonding, or screwing.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A perforation mold for an aluminum foil container, comprising a lower mold base (1) and an upper mold base (2) movably connected to the lower mold base (1), wherein a lower mold (11) is disposed inside the lower mold base (1), and an upper mold (21) is disposed inside the upper mold base (2), characterized in that, Also includes: A piercing tool (3) is set in the lower mold (11), and the piercing tool (3) is provided with a piercing tip (31). An edge-rolling cutter (4) is set in the upper mold (21), and an edge-rolling forming cavity (41) is provided on the edge-rolling cutter (4). The upper mold base (2) moves toward the lower mold base (1), so that the upper mold (21) and the lower mold (11) cooperate to form the raw material into a container; By moving the piercing knife (3) toward the edge-folding knife (4), the piercing knife (3) pierces the container and forms a folded edge at the piercing point. The edge-rolling cutter (4) moves toward the piercing cutter (3) so that the edge-rolling forming cavity (41) comes into contact with the folded edge, and the folded edge is deformed and rolled up in the edge-rolling forming cavity (41).

2. The aluminum foil container perforation mold according to claim 1, characterized in that, The rolled edge forming cavity (41) includes a first forming edge (411) and a second forming edge (412), wherein the first forming edge (411) and the second forming edge (412) are connected.

3. The aluminum foil container perforation mold according to claim 1, characterized in that, The edge-rolling cutter (4) has a deformation receiving cavity (42), and the deformation receiving cavity (42) has a tip receiving cavity (421) and a guide portion (422). The tip receiving cavity (421) is located at the end of the guide portion (422) of the wedge structure.

4. The aluminum foil container perforation mold according to claim 1, characterized in that, The puncture tool (3) has a puncture tip (31) at its end and a rolled edge abutment groove (32) on its puncture tool (3). The rolled edge abutment groove (32) is symmetrically distributed on both sides of the puncture tip (31).

5. The aluminum foil container piercing mold according to claim 1, characterized in that, It also includes a puncture mechanism (5), which includes a puncture plate (51) and a drive unit (52). The puncture plate (51) is movably disposed in the lower mold base (1). The puncture tool (3) is inserted into the puncture plate (51). The lower mold (11) has a through hole for the puncture tool (3) to pass through. The drive unit (52) drives the puncture plate (51) to move in the lower mold base (1) so that the puncture tool (3) passes through the through hole.

6. The aluminum foil container piercing mold according to claim 5, characterized in that, The active drive unit (52) includes a mounting base (521), a rotating part (522), and a guide abutment part (523). The mounting base (521) is fixedly installed on the lower mold (11). The rotating part (522) is rotatably connected to the mounting base (521). The guide abutment part (523) is rotatably connected to both ends of the rotating part (522). One end of the rotating part (522) is located in the lower mold (11), and the other end is located outside the lower mold (11).

7. The aluminum foil container perforation mold according to claim 6, characterized in that, The puncture mechanism (5) also includes a reset plate (53) and a limiting cylinder (54). The reset plate (53) is movably connected to the lower mold (11). The reset plate (53) abuts against the guide abutment (523) provided at one end of the rotating part (522).

8. The aluminum foil container piercing mold according to claim 1, characterized in that, An upper cylinder (22) is provided on the upper mold base (2), the upper mold (21) is connected to the output end of the upper cylinder (22), and a pressure plate (23) is connected on the upper mold base (2), the pressure plate (23) is slidably connected to the upper mold (21).

9. A piercing forming method applied to the piercing mold of the aluminum foil container described in claims 1-8, characterized in that, Includes the following steps: Drive the upper mold base (2) to move to the lower mold base (1), cut the raw material through the clamping plate (23), and press the raw material onto the reset plate (53); Drive the upper mold (21) to move to the lower mold (11) to form the raw material into a container; The active drive unit (52) drives the puncture active plate (51) to move, so that the puncture knife (3) provided on the puncture active plate (51) passes through the lower mold (11), the puncture tip (31) of the puncture knife (3) punctures the container and continues to move toward the edge rolling knife (4); The piercing tip (31) of the piercing knife (3) is inserted into the deformation receiving cavity (42). The piercing tip (31) abuts against the tip receiving cavity (421) and pushes the edge-rolling knife (4) to move, so that the aluminum foil at the piercing point of the container moves along the guide part (422) of the deformation receiving cavity (42) and the side wall of the piercing knife (3) to form a folded edge. The edge-rolling cutter (4) is driven to move toward the piercing cutter (3), while the upper mold base (2) rises, the clamping plate (23) and the reset plate (53) rise synchronously, and the piercing cutter (3) and the edge-rolling cutter (4) fall synchronously. During the movement of the curling cutter (4) toward the piercing cutter (3), the first forming edge (411) of the curling forming cavity (41) abuts against the folded edge, causing the folded edge to deform around the first forming edge (411). During the deformation of the folded edge, it abuts against the second forming edge (412), and the folded edge further abuts against the curling abutment groove (32), causing the folded edge to be rolled into a folded edge roll. At this time, the piercing cutter (3) is reset to the lower mold (11).

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