Edge-folded aluminum foil meal box compression molding die

Abstract

The utility model discloses an edge-folded aluminum foil lunch box pressing forming die, and relates to the technical field of lunch box processing, and the edge-folded aluminum foil lunch box pressing forming die comprises an upper die plate, the lower end face of the upper die plate is fixedly connected with an upper shearing plate, and the outer side of the upper shearing plate is sleeved with a discharging plate which is in sliding connection with the upper die plate; a female die driven by a first linear driving mechanism to ascend and descend is arranged on the inner side of the upper shearing plate, the female die comprises a containing cavity forming area, an edge folding forming area is arranged in the circumferential direction of the containing cavity forming area, and a pressing ring is arranged between the containing cavity forming area and the edge folding forming area. The upper end face of the lower die plate is fixedly connected with a lower shearing plate and a male die, the outer side of the male die is sleeved with a blank holder driven by a second linear driving mechanism to ascend and descend, and an annular groove matched with the pressing ring is formed in the female die. According to the edge-folded aluminum foil lunch box pressing forming die, the n-shaped folded edges are formed, so that the structural strength of a lunch box formed through pressing is improved, and deformation of the lunch box is avoided.

Description

Technical Field

[0001] This utility model relates to the field of lunch box processing technology, specifically a folded aluminum foil lunch box pressing and forming mold. Background Technology

[0002] In the design and use of aluminum foil food containers, manufacturers typically incorporate folded edges to effectively prevent burns from direct contact with hot food. This design provides a safe, insulated area for the user, making it easy to hold without being burned.

[0003] However, for larger aluminum foil food containers, especially when containing large amounts of soup or liquid food, the edges are prone to deformation and inward folding due to the relatively large distance between the support points at both ends of the container. This can easily lead to spillage of soup or liquid, resulting in food waste and potentially causing inconvenience or even safety hazards for users.

[0004] Therefore, it is necessary to propose a folded aluminum foil lunch box pressing mold to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a mold for pressing and forming aluminum foil lunch boxes with folded edges, so as to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a folded aluminum foil lunchbox pressing mold, comprising:

[0009] Upper template: The lower end face of the upper template is fixedly connected to an upper shear plate. The outer side of the upper shear plate is fitted with a stripper plate that is slidably connected to the upper template. The inner side of the upper shear plate is provided with a concave mold that is driven to rise and fall by a first linear drive mechanism. The concave mold includes a cavity forming area and a folding forming area is provided along the circumference of the cavity forming area. A pressure ring is provided between the cavity forming area and the folding forming area.

[0010] Lower template: The upper end face of the lower template is fixedly connected to a lower shear plate and a punch. A pressure ring driven to rise and fall by a second linear drive mechanism is sleeved on the outer side of the punch. An annular groove adapted to the pressure ring is opened on the punch.

[0011] Preferably, the cross-section of the pressure ring at the end away from the die is spherical.

[0012] Preferably, the punch has an annular groove that matches the outline of the lunchbox, and the die has an annular pressing block that matches the annular groove.

[0013] Preferably, the inner edges of the upper shear plate and the pressing ring are respectively provided with an upper edge curling groove and a lower edge curling groove; the upper edge curling groove and the lower edge curling groove are combined to form an annular cavity with an opening on the inner side, and the cross-section of the annular cavity is circular.

[0014] Preferably, when the die descends to its limit position relative to the upper shear plate, the lower edge of the die is flush with the upper edge groove.

[0015] Preferably, the cross-sections of both the upper and lower edge-curling grooves are arc-shaped, and the arc length of the upper edge-curling groove cross-section is smaller than the arc length of the lower edge-curling groove cross-section.

[0016] Preferably, both the first linear drive mechanism and the second linear drive mechanism are cylinders.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a mold for pressing and forming aluminum foil lunch boxes with folded edges, which has the following beneficial effects:

[0019] 1. The folded aluminum foil lunch box pressing mold, by setting a pressure ring and a ring groove, forms a geometric folded edge under their cooperation, thereby improving the structural strength of the pressed lunch box and preventing it from deforming.

[0020] 2. The pressing mold for the folded aluminum foil lunch box, by setting the upper and lower edge rolling grooves, makes the edge of the aluminum foil board curl, further improving the structural strength of the folded edge, and at the same time effectively avoiding the safety hazards that may be caused by the sharp edges of the aluminum foil lunch box. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of the structure of this utility model;

[0022] Figure 2 This is an enlarged schematic diagram of the hemmed groove of this utility model;

[0023] Figure 3 This is a top view of the punch of this utility model.

[0024] In the diagram: 1. Upper template; 2. First linear drive mechanism; 3. Die; 4. Upper shear plate; 5. Stripper plate; 6. Lower shear plate; 7. Pressure ring; 8. Punch; 10. Lower template; 11. Second linear drive mechanism; 12. Guide post; 13. Upper hemming groove; 14. Lower hemming groove; 15. Pressure ring; 16. Annular groove; 18. Annular pressure groove; 19. Receiving cavity forming area; 20. Folding forming area. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figure 1-3 As shown, a folded aluminum foil lunch box pressing mold includes an upper template 1 and a lower template 10. An upper shear plate 4 is fixedly connected to the lower end face of the upper template 1. A stripper plate 5, slidably connected to the upper template 1, is sleeved on the outer side of the upper shear plate 4. A concave mold 3, driven and lifted by a first linear drive mechanism 2, is provided on the inner side of the upper shear plate 4. The concave mold 3 includes a cavity forming area 19, and a folding forming area 20 is provided circumferentially along the cavity forming area 19. A pressure ring 15 is provided between the cavity forming area 19 and the folding forming area 20. A lower shear plate 6 and a punch 8 are fixedly connected to the upper end face of the lower template 10. A pressure ring 7, driven and lifted by a second linear drive mechanism 11, is sleeved on the outer side of the punch 8. An annular groove 16 adapted to the pressure ring 15 is provided on the punch 8. Specifically, both the first linear drive mechanism 2 and the second linear drive mechanism 11 are cylinders.

[0027] The process of pressing and shaping lunch boxes includes the following steps:

[0028] Material feeding: The upper template 1 is driven by the stamping equipment to move down along the guide post 12. When the unloading plate 5 contacts the lower shear plate 6, the aluminum foil is clamped. Then the upper shear plate 4 contacts the pressure ring 7 and moves down synchronously. Under the action of the upper shear plate 4 and the lower shear plate 6, the aluminum foil is punched.

[0029] Forming: As the concave mold 3 and the convex mold 8 align, they pull the aluminum foil sheet towards the center and press it into shape. At this time, the upper template 1 moves down to the limit position, and the pressure ring 15 presses the aluminum foil sheet into the ring groove 16, forming a geometric fold between the receiving cavity and the folded edge of the lunch box.

[0030] Demolding: When the lower edge groove 14 rises to be flush with the lower end face edge of the die 3, the die 3 rises with the upper template 1. Because the workpiece itself has a certain amount of springback, it fits tightly with the die 3, thereby driving it to detach from the lower shear plate 6. When the upper template 1 rises to the limit position, the first linear drive mechanism 2 drives the die 3 to rise, so that the lunch box detaches from the die 3.

[0031] With the cooperation of the pressure ring 15 and the ring groove 16, a geometric fold is formed, thereby improving the structural strength of the pressed lunch box and preventing it from deforming.

[0032] To prevent the aluminum foil from breaking due to an excessively small bend angle, the cross-section of the end of the pressure ring 15 furthest from the die 3 is spherical. This reduces localized stress, prevents the aluminum foil from breaking or being damaged, and ensures its forming rate.

[0033] To further enhance the structural strength of the lunchbox, the punch 8 has an annular groove 18 that matches the contour of the lunchbox, and the die 3 has an annular pressing block that matches the annular groove 18. Together, they form an annular indentation to strengthen the lunchbox's structure.

[0034] In some embodiments, the inner edges of the upper shear plate 4 and the pressure ring 7 are respectively provided with an upper edge curling groove 13 and a lower edge curling groove 14; the upper edge curling groove 13 and the lower edge curling groove 14 together form an annular cavity with an opening on the inner side, and the cross-section of the annular cavity is circular. When the die 3 descends to its limit position relative to the upper shear plate 4, the lower edge of the die 3 is flush with the upper edge curling groove 13.

[0035] After the die 3 and the punch 8 are engaged, the edge of the aluminum foil moves into the lower curling groove 14. Then the upper template 1 moves upward, and the second linear drive mechanism 11 drives the pressure ring 7 and the upper shear plate 4 to move upward synchronously. Under the action of the first linear drive mechanism 2, the die 3 continues to press the workpiece. The edge of the aluminum foil curls and forms a curl under the action of the upper curling groove 13 and the lower curling groove 14. Then the demolding operation can be performed.

[0036] The rolled edge design further reinforces the edges of the lunchbox, making the overall structure more stable. It also effectively avoids potential safety hazards from the sharp edges of aluminum foil lunchboxes, ensuring safe use.

[0037] Both the upper edge-rolling groove 13 and the lower edge-rolling groove 14 have arc-shaped cross-sections, with the arc length of the upper edge-rolling groove 13 being smaller than that of the lower edge-rolling groove 14. By setting the upper edge-rolling groove 13 with a smaller arc length, the rolled edge of the lunch box can be separated from the upper edge-rolling groove 13 after the die 3 is demolded.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold for pressing and forming aluminum foil lunch boxes with folded edges, characterized in that, include: Upper template (1): The lower end face of the upper template (1) is fixedly connected to an upper shear plate (4). The outer side of the upper shear plate (4) is fitted with a stripper plate (5) that is slidably connected to the upper template (1). The inner side of the upper shear plate (4) is provided with a concave mold (3) driven to rise and fall by a first linear drive mechanism (2). The concave mold (3) includes a cavity forming area (19). A folding forming area (20) is provided along the circumference of the cavity forming area (19). A pressure ring (15) is provided between the cavity forming area (19) and the folding forming area (20). Lower template (10): The upper end face of the lower template (10) is fixedly connected to a lower shear plate (6) and a punch (8). The outer side of the punch (8) is fitted with a pressure ring (7) driven to rise and fall by a second linear drive mechanism (11). The punch (8) has an annular groove (16) adapted to the pressure ring (15).

2. The folded aluminum foil lunch box pressing mold according to claim 1, characterized in that: The cross-section of the pressure ring (15) at the end away from the die (3) is spherical.

3. The folded aluminum foil lunch box pressing mold according to claim 1, characterized in that: The punch (8) has an annular groove (18) that matches the outline of the lunch box, and the die (3) has an annular pressing block that matches the annular groove (18).

4. The folded aluminum foil lunch box pressing mold according to claim 1, characterized in that: The upper shear plate (4) and the pressing ring (7) are respectively provided with an upper edge groove (13) and a lower edge groove (14); the upper edge groove (13) and the lower edge groove (14) are combined to form an annular cavity with an opening on the inner side, and the cross-section of the annular cavity is circular.

5. The folded aluminum foil lunch box pressing mold according to claim 4, characterized in that: When the die (3) descends to its limit position relative to the upper shear plate (4), the lower edge of the die (3) is flush with the upper edge groove (13).

6. The folded aluminum foil lunch box pressing mold according to claim 4, characterized in that: The cross-sections of the upper edge groove (13) and the lower edge groove (14) are both arc-shaped, and the arc length of the cross-section of the upper edge groove (13) is smaller than the arc length of the cross-section of the lower edge groove (14).

7. The folded aluminum foil lunch box pressing mold according to claim 1, characterized in that: Both the first linear drive mechanism (2) and the second linear drive mechanism (11) are cylinders.

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