Aluminum foil meal box pressing die

Abstract

The utility model discloses an aluminum foil meal box pressing die, which relates to the technical field of stamping dies, and comprises an upper die plate and a lower die plate, the lower end face of the upper die plate is fixedly connected with an upper shearing plate, and the inner side of the upper shearing plate is provided with a concave die driven by a first linear driving mechanism to lift. The outer side of the upper shearing plate is sleeved with a discharging plate connected with the upper die plate in a sliding mode. The upper end face of the lower die plate is fixedly connected with a male die matched with the female 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 the outer side of the blank holder is sleeved with a lower shearing plate fixedly connected with the lower die plate. An upper hemming groove and a lower hemming groove are formed in the side, adjacent to the blank holder, of the upper shearing plate. According to the aluminum foil meal box pressing mold, the female mold capable of ascending and descending relative to the upper shearing plate is arranged, and the upper hemming groove with the small arc length is formed, so that demolding is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a pressing die for an aluminum foil lunch box. Background Art

[0002] Aluminum foil is a highly plastic material that can be used to produce containers for general consumables. When producing aluminum foil containers, most of them are processed by stamping.

[0003] A stamping die for processing aluminum foil containers is disclosed in Chinese utility model patent application No. CN202221795520.2. The die includes an upper die and a lower die. The lower die is connected to the upper die through a buffer column. A workbench is provided on the top surface of the lower die. A plurality of matching holes are provided on the workbench. A lower forming die is matched in the matching holes. A plurality of curling forming cores extending into the matching holes are provided on the lower die below the workbench. A cylinder mechanism is provided on the lower die below the matching holes.

[0004] The stamping die for processing the aluminum foil container can realize the stamping forming of the aluminum foil and perform the curling operation on it. However, since the aluminum foil piece itself has a certain amount of rebound, it fits tightly with the upper forming die, making it difficult to demould.

[0005] Therefore, it is necessary to propose an aluminum foil lunch box pressing die to solve the above problems. Utility Model Content

[0006] (1) Technical problems solved

[0007] The purpose of the utility model is to provide an aluminum foil lunch box pressing die to solve the problem of inconvenience in demoulding the aluminum foil parts proposed in the above background technology.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: an aluminum foil lunch box pressing mold, comprising an upper template and a lower template, the lower end surface of the upper template is fixedly connected to an upper shearing plate, the inner side of the upper shearing plate is provided with a concave die driven up and down by a first linear drive mechanism, and the outer side of the upper shearing plate is provided with a discharge plate slidably connected to the upper template;

[0010] The upper end surface of the lower template is fixedly connected to a punch adapted to the die, the outer side of the punch is sleeved with a blank holder driven up and down by a second linear drive mechanism, and the outer side of the blank holder is sleeved with a lower shear plate fixedly connected to the lower template;

[0011] An upper curling groove and a lower curling groove are respectively provided on one side of the upper shear plate adjacent to the pressure ring.

[0012] Preferably, when the die is lowered to the limit position relative to the upper shear plate, the lower end edge of the die is flush with the upper curling groove.

[0013] Preferably, an annular boss is provided on the inner side of the top end of the lower shear plate close to the blank holder ring.

[0014] Preferably, the upper curling groove and the lower 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.

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

[0016] Preferably, exhaust holes are provided in the middle of the concave mold and the convex mold.

[0017] Preferably, there are multiple second linear drive mechanisms, and the multiple second linear drive mechanisms are evenly distributed below the blank holder.

[0018] Preferably, the first linear drive mechanism and the second linear drive mechanism are both cylinders.

[0019] (3) Beneficial effects

[0020] Compared with the prior art, the present invention provides an aluminum foil lunch box pressing die, which has the following beneficial effects:

[0021] The aluminum foil lunch box pressing mold is provided with a first linear drive mechanism to drive the female mold to rise and fall relative to the upper shear plate, and at the same time, with the cooperation of the lunch box curling, the female mold is demoulded, thereby making demoulding more convenient; in addition, an upper curling groove with a smaller arc length is provided, so that after the female mold is demoulded, the curling of the lunch box is separated from the upper curling groove, making demoulding more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional schematic diagram of the structure of the utility model;

[0023] Figure 2 For this utility model Figure 1 A magnified schematic diagram of .

[0024] In the figure: 1. Upper template; 2. First linear drive mechanism; 3. Die; 4. Upper shear plate; 5. Unloading plate; 6. Lower shear plate; 7. Pressure ring; 8. Punch; 10. Lower template; 11. Second linear drive mechanism; 12. Guide column; 13. Upper curling groove; 14. Lower curling groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] See also Figure 1-2 As shown, a pressing die for an aluminum foil lunch box includes an upper template 1 and a lower template 10. The lower end surface of the upper template 1 is fixedly connected to an upper shearing plate 4. The inner side of the upper shearing plate 4 is provided with a die 3 driven up and down by a first linear drive mechanism 2. The outer side of the upper shearing plate 4 is provided with a stripper plate 5 slidably connected to the upper template 1. The upper end surface of the lower template 10 is fixedly connected to a punch 8 adapted to the die 3. The outer side of the punch 8 is provided with a blank holder 7 driven up and down by a second linear drive mechanism 11. The outer side of the blank holder 7 is provided with a lower shearing plate 6 fixedly connected to the lower template 10. The upper shearing plate 4 is provided with an upper curling groove 13 and a lower curling groove 14 on one side adjacent to the blank holder 7. Preferably, the first linear drive mechanism 2 and the second linear drive mechanism 11 are both cylinders.

[0027] When pressing aluminum foil, the following steps are included:

[0028] Blanking: The initial state of the die 3 is as follows Figure 1 As shown, the stamping equipment drives the upper template 1 downward along the guide column 12. When the stripper plate 5 contacts the lower shear plate 6, the aluminum foil plate is clamped. Then the upper shear plate 4 contacts the blank holder 7 and moves downward synchronously. Under the action of the upper shear plate 4 and the lower shear plate 6, the aluminum foil plate is punched.

[0029] Forming: As the die 3 and the punch 8 are aligned, they pull the aluminum foil sheet toward the middle and press it into shape. At this time, the upper template 1 moves downward to the limit position, and the edge of the aluminum foil sheet moves into the lower curling groove 14;

[0030] Curling: Then the upper template 1 moves upward, and the second linear drive mechanism 11 drives the blank holder 7 and the upper shear plate 4 to move upward synchronously. The die 3 continues to press the workpiece under the action of the first linear drive mechanism 2, and the edge of the aluminum foil plate curls and forms a curl under the action of the upper curling groove 13 and the lower curling groove 14;

[0031] Demolding: When the lower curling groove 14 rises to the same level as the edge of the lower end face of the die 3, the die 3 rises along with the upper template 1. Since the workpiece itself has a certain amount of rebound, it fits tightly with the die 3, thereby driving it to separate 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 separates from the die 3, thereby realizing automatic demolding.

[0032] Specifically, when the die 3 is lowered to the limit position relative to the upper shear plate 4, the lower edge of the die 3 is flush with the upper curling groove 13. By controlling the stroke of the die 3, the curling forming position can be controlled.

[0033] To prevent the aluminum foil from sliding during punching, an annular boss is provided on the inner side of the top of the lower shear plate 6 near the blank holder 7. During punching, the stripper plate 5 descends to the annular boss and the stripper plate 5 interacts with the annular boss to clamp the aluminum foil, reducing its force area and increasing its pressure to prevent it from sliding.

[0034] Specifically, the upper curling groove 13 and the lower curling groove 14 are combined to form an annular cavity with an opening inside, and the cross section of the annular cavity is circular. By adopting the cavity with a circular cross section, the edge of the aluminum foil plate can be curled and formed.

[0035] To facilitate demoulding, the cross-sections of the upper and lower curling grooves 13 and 14 are both arc-shaped, and the arc length of the cross-section of the upper curling groove 13 is smaller than that of the cross-section of the lower curling groove 14. By providing the upper curling groove 13 with a smaller arc length, the curling of the lunch box can be separated from the upper curling groove 13 after the die 3 is demoulded.

[0036] Specifically, the middle of the die 3 and the punch 8 are provided with vent holes to allow air to escape during the molding process while preventing negative pressure from being generated and affecting demolding. Preferably, the vent holes are located at the bottom area of ​​the lunch box to avoid affecting the side molding.

[0037] In order to make the lifting and lowering of the blank holder 7 more balanced, there are multiple second linear drive mechanisms 11, and the multiple second linear drive mechanisms 11 are evenly distributed below the blank holder 7.

[0038] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aluminum foil lunch box pressing mold, comprising an upper mold plate (1) and a lower mold plate (10), characterized in that: The lower end surface of the upper template (1) is fixedly connected to an upper shear plate (4), the inner side of the upper shear plate (4) is provided with a die (3) driven to rise and fall by a first linear drive mechanism (2), and the outer side of the upper shear plate (4) is sleeved with a stripper plate (5) slidably connected to the upper template (1); The upper end surface of the lower template (10) is fixedly connected to a punch (8) adapted to the die (3); the outer side of the punch (8) is provided with a blank holder (7) driven to rise and fall by a second linear drive mechanism (11); the outer side of the blank holder (7) is provided with a lower shear plate (6) fixedly connected to the lower template (10); An upper curling groove (13) and a lower curling groove (14) are respectively provided on one side of the upper shear plate (4) adjacent to the pressure ring (7).

2. The aluminum foil lunch box pressing mold according to claim 1, characterized in that: When the die (3) descends to the limit position relative to the upper shear plate (4), the lower end edge of the die (3) is flush with the upper curling groove (13).

3. The aluminum foil lunch box pressing mold according to claim 1, characterized in that: An annular boss is provided on the inner side of the top end of the lower shear plate (6) close to the blank holder ring (7).

4. The aluminum foil lunch box pressing mold according to claim 1, characterized in that: The upper curling groove (13) and the lower curling 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 aluminum foil lunch box pressing mold according to claim 1, characterized in that: The cross-sections of the upper curling groove (13) and the lower curling groove (14) are both arc-shaped, and the arc length of the cross-section of the upper curling groove (13) is smaller than the arc length of the cross-section of the lower curling groove (14).

6. The aluminum foil lunch box pressing mold according to claim 1, characterized in that: The middle parts of the concave mold (3) and the convex mold (8) are both provided with exhaust holes.

7. The aluminum foil lunch box pressing mold according to claim 1, characterized in that: There are multiple second linear drive mechanisms (11), and the multiple second linear drive mechanisms (11) are evenly distributed below the blank holder (7).

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

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